[3320] | 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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| 5 | * (C) 1991, 1992 Linus Torvalds.
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| 6 | *
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| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | * 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 | * superblock 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 Mickiewicz <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 superblock 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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| 91 | #include "libbb.h"
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| 92 | #include "minix.h"
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| 93 |
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| 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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| 97 |
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| 98 | struct BUG_bad_inode_size {
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| 99 | char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
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| 100 | #if ENABLE_FEATURE_MINIX2
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| 101 | char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
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| 102 | #endif
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| 103 | };
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| 104 |
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| 105 | enum {
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| 106 | #ifdef UNUSED
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| 107 | MINIX1_LINK_MAX = 250,
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| 108 | MINIX2_LINK_MAX = 65530,
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| 109 | MINIX_I_MAP_SLOTS = 8,
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| 110 | MINIX_Z_MAP_SLOTS = 64,
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| 111 | MINIX_V1 = 0x0001, /* original minix fs */
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| 112 | MINIX_V2 = 0x0002, /* minix V2 fs */
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| 113 | #endif
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| 114 | MINIX_NAME_MAX = 255, /* # chars in a file name */
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| 115 | };
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| 116 |
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| 117 |
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| 118 | #if !ENABLE_FEATURE_MINIX2
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| 119 | enum { version2 = 0 };
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| 120 | #endif
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| 121 |
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| 122 | enum { MAX_DEPTH = 32 };
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| 123 |
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| 124 | enum { dev_fd = 3 };
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| 125 |
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| 126 | struct globals {
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| 127 | #if ENABLE_FEATURE_MINIX2
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| 128 | smallint version2;
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| 129 | #endif
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| 130 | smallint changed; /* is filesystem modified? */
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| 131 | smallint errors_uncorrected; /* flag if some error was not corrected */
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| 132 | smallint termios_set;
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| 133 | smallint dirsize;
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| 134 | smallint namelen;
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| 135 | const char *device_name;
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| 136 | int directory, regular, blockdev, chardev, links, symlinks, total;
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| 137 | char *inode_buffer;
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| 138 |
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| 139 | char *inode_map;
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| 140 | char *zone_map;
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| 141 |
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| 142 | unsigned char *inode_count;
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| 143 | unsigned char *zone_count;
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| 144 |
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| 145 | /* File-name data */
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| 146 | int name_depth;
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| 147 | char *name_component[MAX_DEPTH+1];
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| 148 |
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| 149 | /* Bigger stuff */
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| 150 | struct termios sv_termios;
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| 151 | char superblock_buffer[BLOCK_SIZE];
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| 152 | char add_zone_ind_blk[BLOCK_SIZE];
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| 153 | char add_zone_dind_blk[BLOCK_SIZE];
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| 154 | IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
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| 155 | char check_file_blk[BLOCK_SIZE];
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| 156 |
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| 157 | /* File-name data */
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| 158 | char current_name[MAX_DEPTH * MINIX_NAME_MAX];
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| 159 | };
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| 160 | #define G (*ptr_to_globals)
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| 161 | #if ENABLE_FEATURE_MINIX2
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| 162 | #define version2 (G.version2 )
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| 163 | #endif
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| 164 | #define changed (G.changed )
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| 165 | #define errors_uncorrected (G.errors_uncorrected )
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| 166 | #define termios_set (G.termios_set )
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| 167 | #define dirsize (G.dirsize )
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| 168 | #define namelen (G.namelen )
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| 169 | #define device_name (G.device_name )
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| 170 | #define directory (G.directory )
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| 171 | #define regular (G.regular )
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| 172 | #define blockdev (G.blockdev )
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| 173 | #define chardev (G.chardev )
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| 174 | #define links (G.links )
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| 175 | #define symlinks (G.symlinks )
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| 176 | #define total (G.total )
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| 177 | #define inode_buffer (G.inode_buffer )
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| 178 | #define inode_map (G.inode_map )
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| 179 | #define zone_map (G.zone_map )
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| 180 | #define inode_count (G.inode_count )
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| 181 | #define zone_count (G.zone_count )
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| 182 | #define name_depth (G.name_depth )
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| 183 | #define name_component (G.name_component )
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| 184 | #define sv_termios (G.sv_termios )
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| 185 | #define superblock_buffer (G.superblock_buffer )
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| 186 | #define add_zone_ind_blk (G.add_zone_ind_blk )
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| 187 | #define add_zone_dind_blk (G.add_zone_dind_blk )
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| 188 | #define add_zone_tind_blk (G.add_zone_tind_blk )
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| 189 | #define check_file_blk (G.check_file_blk )
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| 190 | #define current_name (G.current_name )
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| 191 | #define INIT_G() do { \
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| 192 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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| 193 | dirsize = 16; \
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| 194 | namelen = 14; \
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| 195 | current_name[0] = '/'; \
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| 196 | /*current_name[1] = '\0';*/ \
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| 197 | name_component[0] = ¤t_name[0]; \
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| 198 | } while (0)
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| 199 |
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| 200 |
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| 201 | #define OPTION_STR "larvsmf"
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| 202 | enum {
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| 203 | OPT_l = (1 << 0),
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| 204 | OPT_a = (1 << 1),
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| 205 | OPT_r = (1 << 2),
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| 206 | OPT_v = (1 << 3),
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| 207 | OPT_s = (1 << 4),
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| 208 | OPT_w = (1 << 5),
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| 209 | OPT_f = (1 << 6),
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| 210 | };
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| 211 | #define OPT_list (option_mask32 & OPT_l)
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| 212 | #define OPT_automatic (option_mask32 & OPT_a)
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| 213 | #define OPT_repair (option_mask32 & OPT_r)
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| 214 | #define OPT_verbose (option_mask32 & OPT_v)
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| 215 | #define OPT_show (option_mask32 & OPT_s)
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| 216 | #define OPT_warn_mode (option_mask32 & OPT_w)
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| 217 | #define OPT_force (option_mask32 & OPT_f)
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| 218 | /* non-automatic repairs requested? */
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| 219 | #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
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| 220 |
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| 221 |
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| 222 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
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| 223 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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| 224 |
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| 225 | #define Super (*(struct minix_superblock *)(superblock_buffer))
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| 226 |
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| 227 | #if ENABLE_FEATURE_MINIX2
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| 228 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
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| 229 | #else
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| 230 | # define ZONES ((unsigned)(Super.s_nzones))
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| 231 | #endif
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| 232 | #define INODES ((unsigned)Super.s_ninodes)
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| 233 | #define IMAPS ((unsigned)Super.s_imap_blocks)
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| 234 | #define ZMAPS ((unsigned)Super.s_zmap_blocks)
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| 235 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
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| 236 | #define ZONESIZE ((unsigned)Super.s_log_zone_size)
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| 237 | #define MAXSIZE ((unsigned)Super.s_max_size)
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| 238 | #define MAGIC (Super.s_magic)
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| 239 |
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| 240 | /* gcc likes this more (code is smaller) than macro variant */
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| 241 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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| 242 | {
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| 243 | return (size + n-1) / n;
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| 244 | }
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| 245 |
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| 246 | #if !ENABLE_FEATURE_MINIX2
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| 247 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
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| 248 | #else
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| 249 | #define INODE_BLOCKS div_roundup(INODES, \
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| 250 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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| 251 | #endif
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| 252 |
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| 253 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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| 254 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
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| 255 |
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| 256 | /* Before you ask "where they come from?": */
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| 257 | /* setbit/clrbit are supplied by sys/param.h */
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| 258 |
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| 259 | static int minix_bit(const char *a, unsigned i)
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| 260 | {
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| 261 | return (a[i >> 3] & (1<<(i & 7)));
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| 262 | }
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| 263 |
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| 264 | static void minix_setbit(char *a, unsigned i)
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| 265 | {
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| 266 | setbit(a, i);
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| 267 | changed = 1;
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| 268 | }
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| 269 | static void minix_clrbit(char *a, unsigned i)
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| 270 | {
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| 271 | clrbit(a, i);
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| 272 | changed = 1;
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| 273 | }
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| 274 |
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| 275 | /* Note: do not assume 0/1, it is 0/nonzero */
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| 276 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
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| 277 | #define inode_in_use(x) (minix_bit(inode_map,(x)))
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| 278 |
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| 279 | #define mark_inode(x) (minix_setbit(inode_map,(x)))
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| 280 | #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
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| 281 |
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| 282 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
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| 283 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
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| 284 |
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| 285 |
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| 286 | static void recursive_check(unsigned ino);
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| 287 | #if ENABLE_FEATURE_MINIX2
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| 288 | static void recursive_check2(unsigned ino);
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| 289 | #endif
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| 290 |
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| 291 | static void die(const char *str) NORETURN;
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| 292 | static void die(const char *str)
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| 293 | {
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| 294 | if (termios_set)
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| 295 | tcsetattr_stdin_TCSANOW(&sv_termios);
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| 296 | bb_error_msg_and_die("%s", str);
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| 297 | }
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| 298 |
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| 299 | static void push_filename(const char *name)
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| 300 | {
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| 301 | // /dir/dir/dir/file
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| 302 | // ^ ^ ^
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| 303 | // [0] [1] [2] <-name_component[i]
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| 304 | if (name_depth < MAX_DEPTH) {
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| 305 | int len;
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| 306 | char *p = name_component[name_depth];
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| 307 | *p++ = '/';
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| 308 | len = sprintf(p, "%.*s", namelen, name);
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| 309 | name_component[name_depth + 1] = p + len;
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| 310 | }
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| 311 | name_depth++;
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| 312 | }
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| 313 |
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| 314 | static void pop_filename(void)
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| 315 | {
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| 316 | name_depth--;
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| 317 | if (name_depth < MAX_DEPTH) {
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| 318 | *name_component[name_depth] = '\0';
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| 319 | if (!name_depth) {
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| 320 | current_name[0] = '/';
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| 321 | current_name[1] = '\0';
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| 322 | }
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| 323 | }
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| 324 | }
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| 325 |
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| 326 | static int ask(const char *string, int def)
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| 327 | {
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| 328 | int c;
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| 329 |
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| 330 | if (!OPT_repair) {
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| 331 | bb_putchar('\n');
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| 332 | errors_uncorrected = 1;
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| 333 | return 0;
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| 334 | }
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| 335 | if (OPT_automatic) {
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| 336 | bb_putchar('\n');
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| 337 | if (!def)
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| 338 | errors_uncorrected = 1;
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| 339 | return def;
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| 340 | }
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| 341 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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| 342 | for (;;) {
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| 343 | fflush_all();
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| 344 | c = getchar();
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| 345 | if (c == EOF) {
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| 346 | if (!def)
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| 347 | errors_uncorrected = 1;
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| 348 | return def;
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| 349 | }
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| 350 | if (c == '\n')
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| 351 | break;
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| 352 | c |= 0x20; /* tolower */
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| 353 | if (c == 'y') {
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| 354 | def = 1;
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| 355 | break;
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| 356 | }
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| 357 | if (c == 'n') {
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| 358 | def = 0;
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| 359 | break;
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| 360 | }
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| 361 | }
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| 362 | if (def)
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| 363 | printf("y\n");
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| 364 | else {
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| 365 | printf("n\n");
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| 366 | errors_uncorrected = 1;
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| 367 | }
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| 368 | return def;
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| 369 | }
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| 370 |
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| 371 | /*
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| 372 | * Make certain that we aren't checking a filesystem that is on a
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| 373 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
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| 374 | * 1994 Theodore Ts'o. Also licensed under GPL.
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| 375 | */
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| 376 | static void check_mount(void)
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| 377 | {
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| 378 | if (find_mount_point(device_name, 0)) {
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| 379 | int cont;
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| 380 | #if ENABLE_FEATURE_MTAB_SUPPORT
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| 381 | /*
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| 382 | * If the root is mounted read-only, then /etc/mtab is
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| 383 | * probably not correct; so we won't issue a warning based on
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| 384 | * it.
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| 385 | */
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| 386 | int fd = open(bb_path_mtab_file, O_RDWR);
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| 387 |
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| 388 | if (fd < 0 && errno == EROFS)
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| 389 | return;
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| 390 | close(fd);
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| 391 | #endif
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| 392 | printf("%s is mounted. ", device_name);
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| 393 | cont = 0;
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| 394 | if (isatty(0) && isatty(1))
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| 395 | cont = ask("Do you really want to continue", 0);
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| 396 | if (!cont) {
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| 397 | printf("Check aborted\n");
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| 398 | exit(EXIT_SUCCESS);
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| 399 | }
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| 400 | }
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| 401 | }
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| 402 |
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| 403 | /*
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| 404 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
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| 405 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
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| 406 | * if an error was corrected, and returns the zone (0 for no zone
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| 407 | * or a bad zone-number).
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| 408 | */
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| 409 | static int check_zone_nr2(uint32_t *nr, smallint *corrected)
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| 410 | {
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| 411 | const char *msg;
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| 412 | if (!*nr)
|
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| 413 | return 0;
|
---|
| 414 | if (*nr < FIRSTZONE)
|
---|
| 415 | msg = "< FIRSTZONE";
|
---|
| 416 | else if (*nr >= ZONES)
|
---|
| 417 | msg = ">= ZONES";
|
---|
| 418 | else
|
---|
| 419 | return *nr;
|
---|
| 420 | printf("Zone nr %s in file '%s'. ", msg, current_name);
|
---|
| 421 | if (ask("Remove block", 1)) {
|
---|
| 422 | *nr = 0;
|
---|
| 423 | *corrected = 1;
|
---|
| 424 | }
|
---|
| 425 | return 0;
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | static int check_zone_nr(uint16_t *nr, smallint *corrected)
|
---|
| 429 | {
|
---|
| 430 | uint32_t nr32 = *nr;
|
---|
| 431 | int r = check_zone_nr2(&nr32, corrected);
|
---|
| 432 | *nr = (uint16_t)nr32;
|
---|
| 433 | return r;
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | /*
|
---|
| 437 | * read-block reads block nr into the buffer at addr.
|
---|
| 438 | */
|
---|
| 439 | static void read_block(unsigned nr, void *addr)
|
---|
| 440 | {
|
---|
| 441 | if (!nr) {
|
---|
| 442 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 443 | return;
|
---|
| 444 | }
|
---|
| 445 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
| 446 | if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
|
---|
| 447 | printf("%s: bad block %u in file '%s'\n",
|
---|
| 448 | bb_msg_read_error, nr, current_name);
|
---|
| 449 | errors_uncorrected = 1;
|
---|
| 450 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 451 | }
|
---|
| 452 | }
|
---|
| 453 |
|
---|
| 454 | /*
|
---|
| 455 | * write_block writes block nr to disk.
|
---|
| 456 | */
|
---|
| 457 | static void write_block(unsigned nr, void *addr)
|
---|
| 458 | {
|
---|
| 459 | if (!nr)
|
---|
| 460 | return;
|
---|
| 461 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
| 462 | printf("Internal error: trying to write bad block\n"
|
---|
| 463 | "Write request ignored\n");
|
---|
| 464 | errors_uncorrected = 1;
|
---|
| 465 | return;
|
---|
| 466 | }
|
---|
| 467 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
| 468 | if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
|
---|
| 469 | printf("%s: bad block %u in file '%s'\n",
|
---|
| 470 | bb_msg_write_error, nr, current_name);
|
---|
| 471 | errors_uncorrected = 1;
|
---|
| 472 | }
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | /*
|
---|
| 476 | * map_block calculates the absolute block nr of a block in a file.
|
---|
| 477 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
| 478 | * any indirect blocks with errors.
|
---|
| 479 | */
|
---|
| 480 | static int map_block(struct minix1_inode *inode, unsigned blknr)
|
---|
| 481 | {
|
---|
| 482 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
| 483 | int block, result;
|
---|
| 484 | smallint blk_chg;
|
---|
| 485 |
|
---|
| 486 | if (blknr < 7)
|
---|
| 487 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
| 488 | blknr -= 7;
|
---|
| 489 | if (blknr < 512) {
|
---|
| 490 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
| 491 | goto common;
|
---|
| 492 | }
|
---|
| 493 | blknr -= 512;
|
---|
| 494 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
| 495 | read_block(block, ind); /* double indirect */
|
---|
| 496 | blk_chg = 0;
|
---|
| 497 | result = check_zone_nr(&ind[blknr / 512], &blk_chg);
|
---|
| 498 | if (blk_chg)
|
---|
| 499 | write_block(block, ind);
|
---|
| 500 | block = result;
|
---|
| 501 | common:
|
---|
| 502 | read_block(block, ind);
|
---|
| 503 | blk_chg = 0;
|
---|
| 504 | result = check_zone_nr(&ind[blknr % 512], &blk_chg);
|
---|
| 505 | if (blk_chg)
|
---|
| 506 | write_block(block, ind);
|
---|
| 507 | return result;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | #if ENABLE_FEATURE_MINIX2
|
---|
| 511 | static int map_block2(struct minix2_inode *inode, unsigned blknr)
|
---|
| 512 | {
|
---|
| 513 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
| 514 | int block, result;
|
---|
| 515 | smallint blk_chg;
|
---|
| 516 |
|
---|
| 517 | if (blknr < 7)
|
---|
| 518 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
| 519 | blknr -= 7;
|
---|
| 520 | if (blknr < 256) {
|
---|
| 521 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
| 522 | goto common2;
|
---|
| 523 | }
|
---|
| 524 | blknr -= 256;
|
---|
| 525 | if (blknr < 256 * 256) {
|
---|
| 526 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
| 527 | goto common1;
|
---|
| 528 | }
|
---|
| 529 | blknr -= 256 * 256;
|
---|
| 530 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
| 531 | read_block(block, ind); /* triple indirect */
|
---|
| 532 | blk_chg = 0;
|
---|
| 533 | result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
|
---|
| 534 | if (blk_chg)
|
---|
| 535 | write_block(block, ind);
|
---|
| 536 | block = result;
|
---|
| 537 | common1:
|
---|
| 538 | read_block(block, ind); /* double indirect */
|
---|
| 539 | blk_chg = 0;
|
---|
| 540 | result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
|
---|
| 541 | if (blk_chg)
|
---|
| 542 | write_block(block, ind);
|
---|
| 543 | block = result;
|
---|
| 544 | common2:
|
---|
| 545 | read_block(block, ind);
|
---|
| 546 | blk_chg = 0;
|
---|
| 547 | result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
|
---|
| 548 | if (blk_chg)
|
---|
| 549 | write_block(block, ind);
|
---|
| 550 | return result;
|
---|
| 551 | }
|
---|
| 552 | #endif
|
---|
| 553 |
|
---|
| 554 | static void write_superblock(void)
|
---|
| 555 | {
|
---|
| 556 | /*
|
---|
| 557 | * Set the state of the filesystem based on whether or not there
|
---|
| 558 | * are uncorrected errors. The filesystem valid flag is
|
---|
| 559 | * unconditionally set if we get this far.
|
---|
| 560 | */
|
---|
| 561 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
|
---|
| 562 | if (!errors_uncorrected)
|
---|
| 563 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
| 564 |
|
---|
| 565 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
| 566 | if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
| 567 | die("can't write superblock");
|
---|
| 568 | }
|
---|
| 569 |
|
---|
| 570 | static void write_tables(void)
|
---|
| 571 | {
|
---|
| 572 | write_superblock();
|
---|
| 573 |
|
---|
| 574 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
| 575 | die("can't write inode map");
|
---|
| 576 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
| 577 | die("can't write zone map");
|
---|
| 578 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
| 579 | die("can't write inodes");
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | static void get_dirsize(void)
|
---|
| 583 | {
|
---|
| 584 | int block;
|
---|
| 585 | char blk[BLOCK_SIZE];
|
---|
| 586 | int size;
|
---|
| 587 |
|
---|
| 588 | #if ENABLE_FEATURE_MINIX2
|
---|
| 589 | if (version2)
|
---|
| 590 | block = Inode2[MINIX_ROOT_INO].i_zone[0];
|
---|
| 591 | else
|
---|
| 592 | #endif
|
---|
| 593 | block = Inode1[MINIX_ROOT_INO].i_zone[0];
|
---|
| 594 | read_block(block, blk);
|
---|
| 595 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
| 596 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
| 597 | dirsize = size;
|
---|
| 598 | namelen = size - 2;
|
---|
| 599 | return;
|
---|
| 600 | }
|
---|
| 601 | }
|
---|
| 602 | /* use defaults */
|
---|
| 603 | }
|
---|
| 604 |
|
---|
| 605 | static void read_superblock(void)
|
---|
| 606 | {
|
---|
| 607 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
| 608 | if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
| 609 | die("can't read superblock");
|
---|
| 610 | /* already initialized to:
|
---|
| 611 | namelen = 14;
|
---|
| 612 | dirsize = 16;
|
---|
| 613 | version2 = 0;
|
---|
| 614 | */
|
---|
| 615 | if (MAGIC == MINIX1_SUPER_MAGIC) {
|
---|
| 616 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
|
---|
| 617 | namelen = 30;
|
---|
| 618 | dirsize = 32;
|
---|
| 619 | #if ENABLE_FEATURE_MINIX2
|
---|
| 620 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
| 621 | version2 = 1;
|
---|
| 622 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
| 623 | namelen = 30;
|
---|
| 624 | dirsize = 32;
|
---|
| 625 | version2 = 1;
|
---|
| 626 | #endif
|
---|
| 627 | } else
|
---|
| 628 | die("bad magic number in superblock");
|
---|
| 629 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
| 630 | die("only 1k blocks/zones supported");
|
---|
| 631 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
| 632 | die("bad s_imap_blocks field in superblock");
|
---|
| 633 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
| 634 | die("bad s_zmap_blocks field in superblock");
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | static void read_tables(void)
|
---|
| 638 | {
|
---|
| 639 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
| 640 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
| 641 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
| 642 | inode_count = xmalloc(INODES + 1);
|
---|
| 643 | zone_count = xmalloc(ZONES);
|
---|
| 644 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
| 645 | die("can't read inode map");
|
---|
| 646 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
| 647 | die("can't read zone map");
|
---|
| 648 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
| 649 | die("can't read inodes");
|
---|
| 650 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
| 651 | printf("warning: firstzone!=norm_firstzone\n");
|
---|
| 652 | errors_uncorrected = 1;
|
---|
| 653 | }
|
---|
| 654 | get_dirsize();
|
---|
| 655 | if (OPT_show) {
|
---|
| 656 | printf("%u inodes\n"
|
---|
| 657 | "%u blocks\n"
|
---|
| 658 | "Firstdatazone=%u (%u)\n"
|
---|
| 659 | "Zonesize=%u\n"
|
---|
| 660 | "Maxsize=%u\n"
|
---|
| 661 | "Filesystem state=%u\n"
|
---|
| 662 | "namelen=%u\n\n",
|
---|
| 663 | INODES,
|
---|
| 664 | ZONES,
|
---|
| 665 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
| 666 | BLOCK_SIZE << ZONESIZE,
|
---|
| 667 | MAXSIZE,
|
---|
| 668 | Super.s_state,
|
---|
| 669 | namelen);
|
---|
| 670 | }
|
---|
| 671 | }
|
---|
| 672 |
|
---|
| 673 | static void get_inode_common(unsigned nr, uint16_t i_mode)
|
---|
| 674 | {
|
---|
| 675 | total++;
|
---|
| 676 | if (!inode_count[nr]) {
|
---|
| 677 | if (!inode_in_use(nr)) {
|
---|
| 678 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
| 679 | "for file '%s'\n", nr, current_name);
|
---|
| 680 | if (OPT_repair) {
|
---|
| 681 | if (ask("Mark as 'in use'", 1))
|
---|
| 682 | mark_inode(nr);
|
---|
| 683 | else
|
---|
| 684 | errors_uncorrected = 1;
|
---|
| 685 | }
|
---|
| 686 | }
|
---|
| 687 | if (S_ISDIR(i_mode))
|
---|
| 688 | directory++;
|
---|
| 689 | else if (S_ISREG(i_mode))
|
---|
| 690 | regular++;
|
---|
| 691 | else if (S_ISCHR(i_mode))
|
---|
| 692 | chardev++;
|
---|
| 693 | else if (S_ISBLK(i_mode))
|
---|
| 694 | blockdev++;
|
---|
| 695 | else if (S_ISLNK(i_mode))
|
---|
| 696 | symlinks++;
|
---|
| 697 | else if (S_ISSOCK(i_mode));
|
---|
| 698 | else if (S_ISFIFO(i_mode));
|
---|
| 699 | else {
|
---|
| 700 | printf("%s has mode %05o\n", current_name, i_mode);
|
---|
| 701 | }
|
---|
| 702 | } else
|
---|
| 703 | links++;
|
---|
| 704 | if (!++inode_count[nr]) {
|
---|
| 705 | printf("Warning: inode count too big\n");
|
---|
| 706 | inode_count[nr]--;
|
---|
| 707 | errors_uncorrected = 1;
|
---|
| 708 | }
|
---|
| 709 | }
|
---|
| 710 |
|
---|
| 711 | static struct minix1_inode *get_inode(unsigned nr)
|
---|
| 712 | {
|
---|
| 713 | struct minix1_inode *inode;
|
---|
| 714 |
|
---|
| 715 | if (!nr || nr > INODES)
|
---|
| 716 | return NULL;
|
---|
| 717 | inode = Inode1 + nr;
|
---|
| 718 | get_inode_common(nr, inode->i_mode);
|
---|
| 719 | return inode;
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | #if ENABLE_FEATURE_MINIX2
|
---|
| 723 | static struct minix2_inode *get_inode2(unsigned nr)
|
---|
| 724 | {
|
---|
| 725 | struct minix2_inode *inode;
|
---|
| 726 |
|
---|
| 727 | if (!nr || nr > INODES)
|
---|
| 728 | return NULL;
|
---|
| 729 | inode = Inode2 + nr;
|
---|
| 730 | get_inode_common(nr, inode->i_mode);
|
---|
| 731 | return inode;
|
---|
| 732 | }
|
---|
| 733 | #endif
|
---|
| 734 |
|
---|
| 735 | static void check_root(void)
|
---|
| 736 | {
|
---|
| 737 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
|
---|
| 738 |
|
---|
| 739 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
| 740 | die("root inode isn't a directory");
|
---|
| 741 | }
|
---|
| 742 |
|
---|
| 743 | #if ENABLE_FEATURE_MINIX2
|
---|
| 744 | static void check_root2(void)
|
---|
| 745 | {
|
---|
| 746 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
|
---|
| 747 |
|
---|
| 748 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
| 749 | die("root inode isn't a directory");
|
---|
| 750 | }
|
---|
| 751 | #else
|
---|
| 752 | void check_root2(void);
|
---|
| 753 | #endif
|
---|
| 754 |
|
---|
| 755 | static int add_zone_common(int block, smallint *corrected)
|
---|
| 756 | {
|
---|
| 757 | if (!block)
|
---|
| 758 | return 0;
|
---|
| 759 | if (zone_count[block]) {
|
---|
| 760 | printf("Already used block is reused in file '%s'. ",
|
---|
| 761 | current_name);
|
---|
| 762 | if (ask("Clear", 1)) {
|
---|
| 763 | block = 0;
|
---|
| 764 | *corrected = 1;
|
---|
| 765 | return -1; /* "please zero out *znr" */
|
---|
| 766 | }
|
---|
| 767 | }
|
---|
| 768 | if (!zone_in_use(block)) {
|
---|
| 769 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
| 770 | block, current_name);
|
---|
| 771 | if (ask("Correct", 1))
|
---|
| 772 | mark_zone(block);
|
---|
| 773 | }
|
---|
| 774 | if (!++zone_count[block])
|
---|
| 775 | zone_count[block]--;
|
---|
| 776 | return block;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | static int add_zone(uint16_t *znr, smallint *corrected)
|
---|
| 780 | {
|
---|
| 781 | int block;
|
---|
| 782 |
|
---|
| 783 | block = check_zone_nr(znr, corrected);
|
---|
| 784 | block = add_zone_common(block, corrected);
|
---|
| 785 | if (block == -1) {
|
---|
| 786 | *znr = 0;
|
---|
| 787 | block = 0;
|
---|
| 788 | }
|
---|
| 789 | return block;
|
---|
| 790 | }
|
---|
| 791 |
|
---|
| 792 | #if ENABLE_FEATURE_MINIX2
|
---|
| 793 | static int add_zone2(uint32_t *znr, smallint *corrected)
|
---|
| 794 | {
|
---|
| 795 | int block;
|
---|
| 796 |
|
---|
| 797 | block = check_zone_nr2(znr, corrected);
|
---|
| 798 | block = add_zone_common(block, corrected);
|
---|
| 799 | if (block == -1) {
|
---|
| 800 | *znr = 0;
|
---|
| 801 | block = 0;
|
---|
| 802 | }
|
---|
| 803 | return block;
|
---|
| 804 | }
|
---|
| 805 | #endif
|
---|
| 806 |
|
---|
| 807 | static void add_zone_ind(uint16_t *znr, smallint *corrected)
|
---|
| 808 | {
|
---|
| 809 | int i;
|
---|
| 810 | int block;
|
---|
| 811 | smallint chg_blk = 0;
|
---|
| 812 |
|
---|
| 813 | block = add_zone(znr, corrected);
|
---|
| 814 | if (!block)
|
---|
| 815 | return;
|
---|
| 816 | read_block(block, add_zone_ind_blk);
|
---|
| 817 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
| 818 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
|
---|
| 819 | if (chg_blk)
|
---|
| 820 | write_block(block, add_zone_ind_blk);
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 | #if ENABLE_FEATURE_MINIX2
|
---|
| 824 | static void add_zone_ind2(uint32_t *znr, smallint *corrected)
|
---|
| 825 | {
|
---|
| 826 | int i;
|
---|
| 827 | int block;
|
---|
| 828 | smallint chg_blk = 0;
|
---|
| 829 |
|
---|
| 830 | block = add_zone2(znr, corrected);
|
---|
| 831 | if (!block)
|
---|
| 832 | return;
|
---|
| 833 | read_block(block, add_zone_ind_blk);
|
---|
| 834 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
| 835 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
|
---|
| 836 | if (chg_blk)
|
---|
| 837 | write_block(block, add_zone_ind_blk);
|
---|
| 838 | }
|
---|
| 839 | #endif
|
---|
| 840 |
|
---|
| 841 | static void add_zone_dind(uint16_t *znr, smallint *corrected)
|
---|
| 842 | {
|
---|
| 843 | int i;
|
---|
| 844 | int block;
|
---|
| 845 | smallint chg_blk = 0;
|
---|
| 846 |
|
---|
| 847 | block = add_zone(znr, corrected);
|
---|
| 848 | if (!block)
|
---|
| 849 | return;
|
---|
| 850 | read_block(block, add_zone_dind_blk);
|
---|
| 851 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
| 852 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 853 | if (chg_blk)
|
---|
| 854 | write_block(block, add_zone_dind_blk);
|
---|
| 855 | }
|
---|
| 856 |
|
---|
| 857 | #if ENABLE_FEATURE_MINIX2
|
---|
| 858 | static void add_zone_dind2(uint32_t *znr, smallint *corrected)
|
---|
| 859 | {
|
---|
| 860 | int i;
|
---|
| 861 | int block;
|
---|
| 862 | smallint chg_blk = 0;
|
---|
| 863 |
|
---|
| 864 | block = add_zone2(znr, corrected);
|
---|
| 865 | if (!block)
|
---|
| 866 | return;
|
---|
| 867 | read_block(block, add_zone_dind_blk);
|
---|
| 868 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
| 869 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 870 | if (chg_blk)
|
---|
| 871 | write_block(block, add_zone_dind_blk);
|
---|
| 872 | }
|
---|
| 873 |
|
---|
| 874 | static void add_zone_tind2(uint32_t *znr, smallint *corrected)
|
---|
| 875 | {
|
---|
| 876 | int i;
|
---|
| 877 | int block;
|
---|
| 878 | smallint chg_blk = 0;
|
---|
| 879 |
|
---|
| 880 | block = add_zone2(znr, corrected);
|
---|
| 881 | if (!block)
|
---|
| 882 | return;
|
---|
| 883 | read_block(block, add_zone_tind_blk);
|
---|
| 884 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
| 885 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
|
---|
| 886 | if (chg_blk)
|
---|
| 887 | write_block(block, add_zone_tind_blk);
|
---|
| 888 | }
|
---|
| 889 | #endif
|
---|
| 890 |
|
---|
| 891 | static void check_zones(unsigned i)
|
---|
| 892 | {
|
---|
| 893 | struct minix1_inode *inode;
|
---|
| 894 |
|
---|
| 895 | if (!i || i > INODES)
|
---|
| 896 | return;
|
---|
| 897 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 898 | return;
|
---|
| 899 | inode = Inode1 + i;
|
---|
| 900 | if (!S_ISDIR(inode->i_mode)
|
---|
| 901 | && !S_ISREG(inode->i_mode)
|
---|
| 902 | && !S_ISLNK(inode->i_mode)
|
---|
| 903 | ) {
|
---|
| 904 | return;
|
---|
| 905 | }
|
---|
| 906 | for (i = 0; i < 7; i++)
|
---|
| 907 | add_zone(i + inode->i_zone, &changed);
|
---|
| 908 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
| 909 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 | #if ENABLE_FEATURE_MINIX2
|
---|
| 913 | static void check_zones2(unsigned i)
|
---|
| 914 | {
|
---|
| 915 | struct minix2_inode *inode;
|
---|
| 916 |
|
---|
| 917 | if (!i || i > INODES)
|
---|
| 918 | return;
|
---|
| 919 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 920 | return;
|
---|
| 921 | inode = Inode2 + i;
|
---|
| 922 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
| 923 | && !S_ISLNK(inode->i_mode))
|
---|
| 924 | return;
|
---|
| 925 | for (i = 0; i < 7; i++)
|
---|
| 926 | add_zone2(i + inode->i_zone, &changed);
|
---|
| 927 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
| 928 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
| 929 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
| 930 | }
|
---|
| 931 | #endif
|
---|
| 932 |
|
---|
| 933 | static void check_file(struct minix1_inode *dir, unsigned offset)
|
---|
| 934 | {
|
---|
| 935 | struct minix1_inode *inode;
|
---|
| 936 | int ino;
|
---|
| 937 | char *name;
|
---|
| 938 | int block;
|
---|
| 939 |
|
---|
| 940 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
| 941 | read_block(block, check_file_blk);
|
---|
| 942 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
| 943 | ino = *(uint16_t *) (name - 2);
|
---|
| 944 | if (ino > INODES) {
|
---|
| 945 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
| 946 | current_name, namelen, name);
|
---|
| 947 | if (ask("Remove", 1)) {
|
---|
| 948 | *(uint16_t *) (name - 2) = 0;
|
---|
| 949 | write_block(block, check_file_blk);
|
---|
| 950 | }
|
---|
| 951 | ino = 0;
|
---|
| 952 | }
|
---|
| 953 | push_filename(name);
|
---|
| 954 | inode = get_inode(ino);
|
---|
| 955 | pop_filename();
|
---|
| 956 | if (!offset) {
|
---|
| 957 | if (inode && LONE_CHAR(name, '.'))
|
---|
| 958 | return;
|
---|
| 959 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 960 | errors_uncorrected = 1;
|
---|
| 961 | }
|
---|
| 962 | if (offset == dirsize) {
|
---|
| 963 | if (inode && strcmp("..", name) == 0)
|
---|
| 964 | return;
|
---|
| 965 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 966 | errors_uncorrected = 1;
|
---|
| 967 | }
|
---|
| 968 | if (!inode)
|
---|
| 969 | return;
|
---|
| 970 | push_filename(name);
|
---|
| 971 | if (OPT_list) {
|
---|
| 972 | if (OPT_verbose)
|
---|
| 973 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
| 974 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
| 975 | }
|
---|
| 976 | check_zones(ino);
|
---|
| 977 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 978 | recursive_check(ino);
|
---|
| 979 | pop_filename();
|
---|
| 980 | }
|
---|
| 981 |
|
---|
| 982 | #if ENABLE_FEATURE_MINIX2
|
---|
| 983 | static void check_file2(struct minix2_inode *dir, unsigned offset)
|
---|
| 984 | {
|
---|
| 985 | struct minix2_inode *inode;
|
---|
| 986 | int ino;
|
---|
| 987 | char *name;
|
---|
| 988 | int block;
|
---|
| 989 |
|
---|
| 990 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
| 991 | read_block(block, check_file_blk);
|
---|
| 992 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
| 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;
|
---|
| 999 | write_block(block, check_file_blk);
|
---|
| 1000 | }
|
---|
| 1001 | ino = 0;
|
---|
| 1002 | }
|
---|
| 1003 | push_filename(name);
|
---|
| 1004 | inode = get_inode2(ino);
|
---|
| 1005 | pop_filename();
|
---|
| 1006 | if (!offset) {
|
---|
| 1007 | if (inode && LONE_CHAR(name, '.'))
|
---|
| 1008 | return;
|
---|
| 1009 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 1010 | errors_uncorrected = 1;
|
---|
| 1011 | }
|
---|
| 1012 | if (offset == dirsize) {
|
---|
| 1013 | if (inode && strcmp("..", name) == 0)
|
---|
| 1014 | return;
|
---|
| 1015 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 1016 | errors_uncorrected = 1;
|
---|
| 1017 | }
|
---|
| 1018 | if (!inode)
|
---|
| 1019 | return;
|
---|
| 1020 | push_filename(name);
|
---|
| 1021 | if (OPT_list) {
|
---|
| 1022 | if (OPT_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_zones2(ino);
|
---|
| 1027 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 1028 | recursive_check2(ino);
|
---|
| 1029 | pop_filename();
|
---|
| 1030 | }
|
---|
| 1031 | #endif
|
---|
| 1032 |
|
---|
| 1033 | static void recursive_check(unsigned ino)
|
---|
| 1034 | {
|
---|
| 1035 | struct minix1_inode *dir;
|
---|
| 1036 | unsigned offset;
|
---|
| 1037 |
|
---|
| 1038 | dir = Inode1 + ino;
|
---|
| 1039 | if (!S_ISDIR(dir->i_mode))
|
---|
| 1040 | die("internal error");
|
---|
| 1041 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1042 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1043 | errors_uncorrected = 1;
|
---|
| 1044 | }
|
---|
| 1045 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1046 | check_file(dir, offset);
|
---|
| 1047 | }
|
---|
| 1048 |
|
---|
| 1049 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1050 | static void recursive_check2(unsigned ino)
|
---|
| 1051 | {
|
---|
| 1052 | struct minix2_inode *dir;
|
---|
| 1053 | unsigned offset;
|
---|
| 1054 |
|
---|
| 1055 | dir = Inode2 + ino;
|
---|
| 1056 | if (!S_ISDIR(dir->i_mode))
|
---|
| 1057 | die("internal error");
|
---|
| 1058 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1059 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1060 | errors_uncorrected = 1;
|
---|
| 1061 | }
|
---|
| 1062 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1063 | check_file2(dir, offset);
|
---|
| 1064 | }
|
---|
| 1065 | #endif
|
---|
| 1066 |
|
---|
| 1067 | static int bad_zone(int i)
|
---|
| 1068 | {
|
---|
| 1069 | char buffer[BLOCK_SIZE];
|
---|
| 1070 |
|
---|
| 1071 | xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
|
---|
| 1072 | return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
|
---|
| 1073 | }
|
---|
| 1074 |
|
---|
| 1075 | static void check_counts(void)
|
---|
| 1076 | {
|
---|
| 1077 | int i;
|
---|
| 1078 |
|
---|
| 1079 | for (i = 1; i <= INODES; i++) {
|
---|
| 1080 | if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
|
---|
| 1081 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1082 | if (ask("Clear", 1)) {
|
---|
| 1083 | Inode1[i].i_mode = 0;
|
---|
| 1084 | changed = 1;
|
---|
| 1085 | }
|
---|
| 1086 | }
|
---|
| 1087 | if (!inode_count[i]) {
|
---|
| 1088 | if (!inode_in_use(i))
|
---|
| 1089 | continue;
|
---|
| 1090 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1091 | if (ask("Clear", 1))
|
---|
| 1092 | unmark_inode(i);
|
---|
| 1093 | continue;
|
---|
| 1094 | }
|
---|
| 1095 | if (!inode_in_use(i)) {
|
---|
| 1096 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1097 | if (ask("Set", 1))
|
---|
| 1098 | mark_inode(i);
|
---|
| 1099 | }
|
---|
| 1100 | if (Inode1[i].i_nlinks != inode_count[i]) {
|
---|
| 1101 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
| 1102 | i, Inode1[i].i_mode, Inode1[i].i_nlinks,
|
---|
| 1103 | inode_count[i]);
|
---|
| 1104 | if (ask("Set i_nlinks to count", 1)) {
|
---|
| 1105 | Inode1[i].i_nlinks = inode_count[i];
|
---|
| 1106 | changed = 1;
|
---|
| 1107 | }
|
---|
| 1108 | }
|
---|
| 1109 | }
|
---|
| 1110 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
| 1111 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
| 1112 | continue;
|
---|
| 1113 | if (!zone_count[i]) {
|
---|
| 1114 | if (bad_zone(i))
|
---|
| 1115 | continue;
|
---|
| 1116 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1117 | if (ask("Unmark", 1))
|
---|
| 1118 | unmark_zone(i);
|
---|
| 1119 | continue;
|
---|
| 1120 | }
|
---|
| 1121 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
| 1122 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
| 1123 | }
|
---|
| 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1127 | static void check_counts2(void)
|
---|
| 1128 | {
|
---|
| 1129 | int i;
|
---|
| 1130 |
|
---|
| 1131 | for (i = 1; i <= INODES; i++) {
|
---|
| 1132 | if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
| 1133 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1134 | if (ask("Clear", 1)) {
|
---|
| 1135 | Inode2[i].i_mode = 0;
|
---|
| 1136 | changed = 1;
|
---|
| 1137 | }
|
---|
| 1138 | }
|
---|
| 1139 | if (!inode_count[i]) {
|
---|
| 1140 | if (!inode_in_use(i))
|
---|
| 1141 | continue;
|
---|
| 1142 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1143 | if (ask("Clear", 1))
|
---|
| 1144 | unmark_inode(i);
|
---|
| 1145 | continue;
|
---|
| 1146 | }
|
---|
| 1147 | if (!inode_in_use(i)) {
|
---|
| 1148 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1149 | if (ask("Set", 1))
|
---|
| 1150 | mark_inode(i);
|
---|
| 1151 | }
|
---|
| 1152 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
| 1153 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
| 1154 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
| 1155 | inode_count[i]);
|
---|
| 1156 | if (ask("Set i_nlinks to count", 1)) {
|
---|
| 1157 | Inode2[i].i_nlinks = inode_count[i];
|
---|
| 1158 | changed = 1;
|
---|
| 1159 | }
|
---|
| 1160 | }
|
---|
| 1161 | }
|
---|
| 1162 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
| 1163 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
| 1164 | continue;
|
---|
| 1165 | if (!zone_count[i]) {
|
---|
| 1166 | if (bad_zone(i))
|
---|
| 1167 | continue;
|
---|
| 1168 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1169 | if (ask("Unmark", 1))
|
---|
| 1170 | unmark_zone(i);
|
---|
| 1171 | continue;
|
---|
| 1172 | }
|
---|
| 1173 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
| 1174 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
| 1175 | }
|
---|
| 1176 | }
|
---|
| 1177 | #endif
|
---|
| 1178 |
|
---|
| 1179 | static void check(void)
|
---|
| 1180 | {
|
---|
| 1181 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1182 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
| 1183 | check_zones(MINIX_ROOT_INO);
|
---|
| 1184 | recursive_check(MINIX_ROOT_INO);
|
---|
| 1185 | check_counts();
|
---|
| 1186 | }
|
---|
| 1187 |
|
---|
| 1188 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1189 | static void check2(void)
|
---|
| 1190 | {
|
---|
| 1191 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1192 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
| 1193 | check_zones2(MINIX_ROOT_INO);
|
---|
| 1194 | recursive_check2(MINIX_ROOT_INO);
|
---|
| 1195 | check_counts2();
|
---|
| 1196 | }
|
---|
| 1197 | #else
|
---|
| 1198 | void check2(void);
|
---|
| 1199 | #endif
|
---|
| 1200 |
|
---|
| 1201 | int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 1202 | int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 1203 | {
|
---|
| 1204 | struct termios tmp;
|
---|
| 1205 | int retcode = 0;
|
---|
| 1206 |
|
---|
| 1207 | xfunc_error_retval = 8;
|
---|
| 1208 |
|
---|
| 1209 | INIT_G();
|
---|
| 1210 |
|
---|
| 1211 | opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
|
---|
| 1212 | getopt32(argv, OPTION_STR);
|
---|
| 1213 | argv += optind;
|
---|
| 1214 | device_name = argv[0];
|
---|
| 1215 |
|
---|
| 1216 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
| 1217 | if (OPT_manual) {
|
---|
| 1218 | if (!isatty(0) || !isatty(1))
|
---|
| 1219 | die("need terminal for interactive repairs");
|
---|
| 1220 | }
|
---|
| 1221 | xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
|
---|
| 1222 |
|
---|
| 1223 | /*sync(); paranoia? */
|
---|
| 1224 | read_superblock();
|
---|
| 1225 |
|
---|
| 1226 | /*
|
---|
| 1227 | * Determine whether or not we should continue with the checking.
|
---|
| 1228 | * This is based on the status of the filesystem valid and error
|
---|
| 1229 | * flags and whether or not the -f switch was specified on the
|
---|
| 1230 | * command line.
|
---|
| 1231 | */
|
---|
| 1232 | printf("%s: %s\n", applet_name, bb_banner);
|
---|
| 1233 |
|
---|
| 1234 | if (!(Super.s_state & MINIX_ERROR_FS)
|
---|
| 1235 | && (Super.s_state & MINIX_VALID_FS) && !OPT_force
|
---|
| 1236 | ) {
|
---|
| 1237 | if (OPT_repair)
|
---|
| 1238 | printf("%s is clean, check is skipped\n", device_name);
|
---|
| 1239 | return 0;
|
---|
| 1240 | } else if (OPT_force)
|
---|
| 1241 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
| 1242 | else if (OPT_repair)
|
---|
| 1243 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
| 1244 | device_name);
|
---|
| 1245 |
|
---|
| 1246 | read_tables();
|
---|
| 1247 |
|
---|
| 1248 | if (OPT_manual) {
|
---|
| 1249 | tcgetattr(0, &sv_termios);
|
---|
| 1250 | tmp = sv_termios;
|
---|
| 1251 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
| 1252 | tcsetattr_stdin_TCSANOW(&tmp);
|
---|
| 1253 | termios_set = 1;
|
---|
| 1254 | }
|
---|
| 1255 |
|
---|
| 1256 | if (version2) {
|
---|
| 1257 | check_root2();
|
---|
| 1258 | check2();
|
---|
| 1259 | } else {
|
---|
| 1260 | check_root();
|
---|
| 1261 | check();
|
---|
| 1262 | }
|
---|
| 1263 |
|
---|
| 1264 | if (OPT_verbose) {
|
---|
| 1265 | int i, free_cnt;
|
---|
| 1266 |
|
---|
| 1267 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
| 1268 | if (!inode_in_use(i))
|
---|
| 1269 | free_cnt++;
|
---|
| 1270 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
|
---|
| 1271 | 100 * (INODES - free_cnt) / INODES);
|
---|
| 1272 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
| 1273 | if (!zone_in_use(i))
|
---|
| 1274 | free_cnt++;
|
---|
| 1275 | printf("%6u zones used (%u%%)\n\n"
|
---|
| 1276 | "%6u regular files\n"
|
---|
| 1277 | "%6u directories\n"
|
---|
| 1278 | "%6u character device files\n"
|
---|
| 1279 | "%6u block device files\n"
|
---|
| 1280 | "%6u links\n"
|
---|
| 1281 | "%6u symbolic links\n"
|
---|
| 1282 | "------\n"
|
---|
| 1283 | "%6u files\n",
|
---|
| 1284 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
| 1285 | regular, directory, chardev, blockdev,
|
---|
| 1286 | links - 2 * directory + 1, symlinks,
|
---|
| 1287 | total - 2 * directory + 1);
|
---|
| 1288 | }
|
---|
| 1289 | if (changed) {
|
---|
| 1290 | write_tables();
|
---|
| 1291 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
| 1292 | sync();
|
---|
| 1293 | } else if (OPT_repair)
|
---|
| 1294 | write_superblock();
|
---|
| 1295 |
|
---|
| 1296 | if (OPT_manual)
|
---|
| 1297 | tcsetattr_stdin_TCSANOW(&sv_termios);
|
---|
| 1298 |
|
---|
| 1299 | if (changed)
|
---|
| 1300 | retcode += 3;
|
---|
| 1301 | if (errors_uncorrected)
|
---|
| 1302 | retcode += 4;
|
---|
| 1303 | return retcode;
|
---|
| 1304 | }
|
---|