[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * fsck --- A generic, parallelizing front-end for the fsck program.
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| 4 | * It will automatically try to run fsck programs in parallel if the
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| 5 | * devices are on separate spindles. It is based on the same ideas as
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| 6 | * the generic front end for fsck by David Engel and Fred van Kempen,
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| 7 | * but it has been completely rewritten from scratch to support
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| 8 | * parallel execution.
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| 9 | *
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| 10 | * Written by Theodore Ts'o, <tytso@mit.edu>
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| 11 | *
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| 12 | * Miquel van Smoorenburg (miquels@drinkel.ow.org) 20-Oct-1994:
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| 13 | * o Changed -t fstype to behave like with mount when -A (all file
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| 14 | * systems) or -M (like mount) is specified.
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| 15 | * o fsck looks if it can find the fsck.type program to decide
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| 16 | * if it should ignore the fs type. This way more fsck programs
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| 17 | * can be added without changing this front-end.
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| 18 | * o -R flag skip root file system.
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| 19 | *
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| 20 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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| 21 | * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o.
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| 22 | *
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| 23 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 24 | */
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| 25 |
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| 26 | /* All filesystem specific hooks have been removed.
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| 27 | * If filesystem cannot be determined, we will execute
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| 28 | * "fsck.auto". Currently this also happens if you specify
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| 29 | * UUID=xxx or LABEL=xxx as an object to check.
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| 30 | * Detection code for that is also probably has to be in fsck.auto.
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| 31 | *
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| 32 | * In other words, this is _really_ is just a driver program which
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| 33 | * spawns actual fsck.something for each filesystem to check.
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| 34 | * It doesn't guess filesystem types from on-disk format.
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| 35 | */
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| 36 |
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| 37 | #include "libbb.h"
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| 38 |
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| 39 | /* "progress indicator" code is somewhat buggy and ext[23] specific.
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| 40 | * We should be filesystem agnostic. IOW: there should be a well-defined
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| 41 | * API for fsck.something, NOT ad-hoc hacks in generic fsck. */
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| 42 | #define DO_PROGRESS_INDICATOR 0
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| 43 |
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| 44 | /* fsck 1.41.4 (27-Jan-2009) manpage says:
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| 45 | * 0 - No errors
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| 46 | * 1 - File system errors corrected
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| 47 | * 2 - System should be rebooted
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| 48 | * 4 - File system errors left uncorrected
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| 49 | * 8 - Operational error
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| 50 | * 16 - Usage or syntax error
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| 51 | * 32 - Fsck canceled by user request
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| 52 | * 128 - Shared library error
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| 53 | */
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| 54 | #define EXIT_OK 0
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| 55 | #define EXIT_NONDESTRUCT 1
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| 56 | #define EXIT_DESTRUCT 2
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| 57 | #define EXIT_UNCORRECTED 4
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| 58 | #define EXIT_ERROR 8
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| 59 | #define EXIT_USAGE 16
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| 60 | #define FSCK_CANCELED 32 /* Aborted with a signal or ^C */
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| 61 |
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| 62 | /*
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| 63 | * Internal structure for mount table entries.
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| 64 | */
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| 65 | struct fs_info {
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| 66 | struct fs_info *next;
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| 67 | char *device;
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| 68 | char *mountpt;
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| 69 | char *type;
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| 70 | char *opts;
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| 71 | int passno;
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| 72 | int flags;
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| 73 | };
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| 74 |
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| 75 | #define FLAG_DONE 1
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| 76 | #define FLAG_PROGRESS 2
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| 77 | /*
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| 78 | * Structure to allow exit codes to be stored
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| 79 | */
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| 80 | struct fsck_instance {
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| 81 | struct fsck_instance *next;
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| 82 | int pid;
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| 83 | int flags;
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| 84 | #if DO_PROGRESS_INDICATOR
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| 85 | time_t start_time;
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| 86 | #endif
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| 87 | char *prog;
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| 88 | char *device;
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| 89 | char *base_device; /* /dev/hda for /dev/hdaN etc */
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| 90 | };
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| 91 |
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| 92 | static const char ignored_types[] ALIGN1 =
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| 93 | "ignore\0"
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| 94 | "iso9660\0"
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| 95 | "nfs\0"
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| 96 | "proc\0"
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| 97 | "sw\0"
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| 98 | "swap\0"
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| 99 | "tmpfs\0"
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| 100 | "devpts\0";
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| 101 |
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| 102 | #if 0
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| 103 | static const char really_wanted[] ALIGN1 =
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| 104 | "minix\0"
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| 105 | "ext2\0"
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| 106 | "ext3\0"
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| 107 | "jfs\0"
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| 108 | "reiserfs\0"
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| 109 | "xiafs\0"
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| 110 | "xfs\0";
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| 111 | #endif
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| 112 |
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| 113 | #define BASE_MD "/dev/md"
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| 114 |
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| 115 | static char **args;
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| 116 | static int num_args;
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| 117 | static int verbose;
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| 118 |
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| 119 | #define FS_TYPE_FLAG_NORMAL 0
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| 120 | #define FS_TYPE_FLAG_OPT 1
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| 121 | #define FS_TYPE_FLAG_NEGOPT 2
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| 122 | static char **fs_type_list;
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| 123 | static uint8_t *fs_type_flag;
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| 124 | static smallint fs_type_negated;
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| 125 |
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| 126 | static smallint noexecute;
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| 127 | static smallint serialize;
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| 128 | static smallint skip_root;
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| 129 | /* static smallint like_mount; */
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| 130 | static smallint parallel_root;
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| 131 | static smallint force_all_parallel;
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| 132 |
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| 133 | #if DO_PROGRESS_INDICATOR
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| 134 | static smallint progress;
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| 135 | static int progress_fd;
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| 136 | #endif
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| 137 |
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| 138 | static int num_running;
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| 139 | static int max_running;
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| 140 | static char *fstype;
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| 141 | static struct fs_info *filesys_info;
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| 142 | static struct fs_info *filesys_last;
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| 143 | static struct fsck_instance *instance_list;
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| 144 |
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| 145 | /*
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| 146 | * Return the "base device" given a particular device; this is used to
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| 147 | * assure that we only fsck one partition on a particular drive at any
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| 148 | * one time. Otherwise, the disk heads will be seeking all over the
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| 149 | * place. If the base device cannot be determined, return NULL.
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| 150 | *
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| 151 | * The base_device() function returns an allocated string which must
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| 152 | * be freed.
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| 153 | */
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| 154 | #if ENABLE_FEATURE_DEVFS
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| 155 | /*
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| 156 | * Required for the uber-silly devfs /dev/ide/host1/bus2/target3/lun3
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| 157 | * pathames.
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| 158 | */
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| 159 | static const char *const devfs_hier[] = {
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| 160 | "host", "bus", "target", "lun", NULL
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| 161 | };
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| 162 | #endif
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| 163 |
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| 164 | static char *base_device(const char *device)
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| 165 | {
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| 166 | char *str, *cp;
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| 167 | #if ENABLE_FEATURE_DEVFS
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| 168 | const char *const *hier;
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| 169 | const char *disk;
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| 170 | int len;
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| 171 | #endif
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| 172 | str = xstrdup(device);
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| 173 |
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| 174 | /* Skip over "/dev/"; if it's not present, give up */
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| 175 | cp = skip_dev_pfx(str);
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| 176 | if (cp == str)
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| 177 | goto errout;
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| 178 |
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| 179 | /*
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| 180 | * For md devices, we treat them all as if they were all
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| 181 | * on one disk, since we don't know how to parallelize them.
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| 182 | */
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| 183 | if (cp[0] == 'm' && cp[1] == 'd') {
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| 184 | cp[2] = 0;
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| 185 | return str;
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| 186 | }
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| 187 |
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| 188 | /* Handle DAC 960 devices */
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| 189 | if (strncmp(cp, "rd/", 3) == 0) {
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| 190 | cp += 3;
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| 191 | if (cp[0] != 'c' || !isdigit(cp[1])
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| 192 | || cp[2] != 'd' || !isdigit(cp[3]))
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| 193 | goto errout;
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| 194 | cp[4] = 0;
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| 195 | return str;
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| 196 | }
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| 197 |
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| 198 | /* Now let's handle /dev/hd* and /dev/sd* devices.... */
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| 199 | if ((cp[0] == 'h' || cp[0] == 's') && cp[1] == 'd') {
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| 200 | cp += 2;
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| 201 | /* If there's a single number after /dev/hd, skip it */
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| 202 | if (isdigit(*cp))
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| 203 | cp++;
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| 204 | /* What follows must be an alpha char, or give up */
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| 205 | if (!isalpha(*cp))
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| 206 | goto errout;
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| 207 | cp[1] = 0;
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| 208 | return str;
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| 209 | }
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| 210 |
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| 211 | #if ENABLE_FEATURE_DEVFS
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| 212 | /* Now let's handle devfs (ugh) names */
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| 213 | len = 0;
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| 214 | if (strncmp(cp, "ide/", 4) == 0)
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| 215 | len = 4;
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| 216 | if (strncmp(cp, "scsi/", 5) == 0)
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| 217 | len = 5;
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| 218 | if (len) {
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| 219 | cp += len;
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| 220 | /*
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| 221 | * Now we proceed down the expected devfs hierarchy.
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| 222 | * i.e., .../host1/bus2/target3/lun4/...
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| 223 | * If we don't find the expected token, followed by
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| 224 | * some number of digits at each level, abort.
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| 225 | */
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| 226 | for (hier = devfs_hier; *hier; hier++) {
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| 227 | len = strlen(*hier);
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| 228 | if (strncmp(cp, *hier, len) != 0)
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| 229 | goto errout;
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| 230 | cp += len;
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| 231 | while (*cp != '/' && *cp != 0) {
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| 232 | if (!isdigit(*cp))
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| 233 | goto errout;
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| 234 | cp++;
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| 235 | }
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| 236 | cp++;
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| 237 | }
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| 238 | cp[-1] = 0;
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| 239 | return str;
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| 240 | }
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| 241 |
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| 242 | /* Now handle devfs /dev/disc or /dev/disk names */
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| 243 | disk = 0;
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| 244 | if (strncmp(cp, "discs/", 6) == 0)
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| 245 | disk = "disc";
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| 246 | else if (strncmp(cp, "disks/", 6) == 0)
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| 247 | disk = "disk";
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| 248 | if (disk) {
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| 249 | cp += 6;
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| 250 | if (strncmp(cp, disk, 4) != 0)
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| 251 | goto errout;
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| 252 | cp += 4;
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| 253 | while (*cp != '/' && *cp != 0) {
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| 254 | if (!isdigit(*cp))
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| 255 | goto errout;
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| 256 | cp++;
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| 257 | }
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| 258 | *cp = 0;
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| 259 | return str;
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| 260 | }
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| 261 | #endif
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| 262 | errout:
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| 263 | free(str);
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| 264 | return NULL;
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| 265 | }
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| 266 |
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| 267 | static void free_instance(struct fsck_instance *p)
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| 268 | {
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| 269 | free(p->prog);
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| 270 | free(p->device);
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| 271 | free(p->base_device);
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| 272 | free(p);
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| 273 | }
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| 274 |
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| 275 | static struct fs_info *create_fs_device(const char *device, const char *mntpnt,
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| 276 | const char *type, const char *opts,
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| 277 | int passno)
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| 278 | {
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| 279 | struct fs_info *fs;
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| 280 |
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| 281 | fs = xzalloc(sizeof(*fs));
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| 282 | fs->device = xstrdup(device);
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| 283 | fs->mountpt = xstrdup(mntpnt);
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| 284 | if (strchr(type, ','))
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| 285 | type = (char *)"auto";
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| 286 | fs->type = xstrdup(type);
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| 287 | fs->opts = xstrdup(opts ? opts : "");
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| 288 | fs->passno = passno < 0 ? 1 : passno;
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| 289 | /*fs->flags = 0; */
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| 290 | /*fs->next = NULL; */
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| 291 |
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| 292 | if (!filesys_info)
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| 293 | filesys_info = fs;
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| 294 | else
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| 295 | filesys_last->next = fs;
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| 296 | filesys_last = fs;
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| 297 |
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| 298 | return fs;
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| 299 | }
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| 300 |
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| 301 | /* Load the filesystem database from /etc/fstab */
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| 302 | static void load_fs_info(const char *filename)
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| 303 | {
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| 304 | FILE *fstab;
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| 305 | struct mntent mte;
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| 306 | struct fs_info *fs;
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| 307 |
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| 308 | fstab = setmntent(filename, "r");
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| 309 | if (!fstab) {
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| 310 | bb_perror_msg("can't read '%s'", filename);
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| 311 | return;
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| 312 | }
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| 313 |
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| 314 | // Loop through entries
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| 315 | while (getmntent_r(fstab, &mte, bb_common_bufsiz1, COMMON_BUFSIZE)) {
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| 316 | //bb_info_msg("CREATE[%s][%s][%s][%s][%d]", mte.mnt_fsname, mte.mnt_dir,
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| 317 | // mte.mnt_type, mte.mnt_opts,
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| 318 | // mte.mnt_passno);
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| 319 | fs = create_fs_device(mte.mnt_fsname, mte.mnt_dir,
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| 320 | mte.mnt_type, mte.mnt_opts,
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| 321 | mte.mnt_passno);
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| 322 | }
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| 323 | endmntent(fstab);
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| 324 | }
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| 325 |
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| 326 | /* Lookup filesys in /etc/fstab and return the corresponding entry. */
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| 327 | static struct fs_info *lookup(char *filesys)
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| 328 | {
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| 329 | struct fs_info *fs;
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| 330 |
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| 331 | for (fs = filesys_info; fs; fs = fs->next) {
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| 332 | if (strcmp(filesys, fs->device) == 0
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| 333 | || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0)
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| 334 | )
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| 335 | break;
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| 336 | }
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| 337 |
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| 338 | return fs;
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| 339 | }
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| 340 |
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| 341 | #if DO_PROGRESS_INDICATOR
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| 342 | static int progress_active(void)
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| 343 | {
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| 344 | struct fsck_instance *inst;
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| 345 |
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| 346 | for (inst = instance_list; inst; inst = inst->next) {
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| 347 | if (inst->flags & FLAG_DONE)
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| 348 | continue;
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| 349 | if (inst->flags & FLAG_PROGRESS)
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| 350 | return 1;
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| 351 | }
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| 352 | return 0;
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| 353 | }
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| 354 | #endif
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| 355 |
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| 356 |
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| 357 | /*
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| 358 | * Send a signal to all outstanding fsck child processes
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| 359 | */
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| 360 | static void kill_all_if_got_signal(void)
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| 361 | {
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| 362 | static smallint kill_sent;
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| 363 |
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| 364 | struct fsck_instance *inst;
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| 365 |
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| 366 | if (!bb_got_signal || kill_sent)
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| 367 | return;
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| 368 |
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| 369 | for (inst = instance_list; inst; inst = inst->next) {
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| 370 | if (inst->flags & FLAG_DONE)
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| 371 | continue;
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| 372 | kill(inst->pid, SIGTERM);
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| 373 | }
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| 374 | kill_sent = 1;
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| 375 | }
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| 376 |
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| 377 | /*
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| 378 | * Wait for one child process to exit; when it does, unlink it from
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| 379 | * the list of executing child processes, free, and return its exit status.
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| 380 | * If there is no exited child, return -1.
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| 381 | */
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| 382 | static int wait_one(int flags)
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| 383 | {
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| 384 | int status;
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| 385 | int sig;
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| 386 | struct fsck_instance *inst, *prev;
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| 387 | pid_t pid;
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| 388 |
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| 389 | if (!instance_list)
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| 390 | return -1;
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| 391 | /* if (noexecute) { already returned -1; } */
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| 392 |
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| 393 | while (1) {
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| 394 | pid = waitpid(-1, &status, flags);
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| 395 | kill_all_if_got_signal();
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| 396 | if (pid == 0) /* flags == WNOHANG and no children exited */
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| 397 | return -1;
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| 398 | if (pid < 0) {
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| 399 | if (errno == EINTR)
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| 400 | continue;
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| 401 | if (errno == ECHILD) { /* paranoia */
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| 402 | bb_error_msg("wait: no more children");
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| 403 | return -1;
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| 404 | }
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| 405 | bb_perror_msg("wait");
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| 406 | continue;
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| 407 | }
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| 408 | prev = NULL;
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| 409 | inst = instance_list;
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| 410 | do {
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| 411 | if (inst->pid == pid)
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| 412 | goto child_died;
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| 413 | prev = inst;
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| 414 | inst = inst->next;
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| 415 | } while (inst);
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| 416 | }
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| 417 | child_died:
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| 418 |
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| 419 | if (WIFEXITED(status))
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| 420 | status = WEXITSTATUS(status);
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| 421 | else if (WIFSIGNALED(status)) {
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| 422 | sig = WTERMSIG(status);
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| 423 | status = EXIT_UNCORRECTED;
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| 424 | if (sig != SIGINT) {
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| 425 | printf("Warning: %s %s terminated "
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| 426 | "by signal %d\n",
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| 427 | inst->prog, inst->device, sig);
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| 428 | status = EXIT_ERROR;
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| 429 | }
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| 430 | } else {
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| 431 | printf("%s %s: status is %x, should never happen\n",
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| 432 | inst->prog, inst->device, status);
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| 433 | status = EXIT_ERROR;
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| 434 | }
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| 435 |
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| 436 | #if DO_PROGRESS_INDICATOR
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| 437 | if (progress && (inst->flags & FLAG_PROGRESS) && !progress_active()) {
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| 438 | struct fsck_instance *inst2;
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| 439 | for (inst2 = instance_list; inst2; inst2 = inst2->next) {
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| 440 | if (inst2->flags & FLAG_DONE)
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| 441 | continue;
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| 442 | if (strcmp(inst2->type, "ext2") != 0
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| 443 | && strcmp(inst2->type, "ext3") != 0
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| 444 | ) {
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| 445 | continue;
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| 446 | }
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| 447 | /* ext[23], we will send USR1
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| 448 | * (request to start displaying progress bar)
|
---|
| 449 | *
|
---|
| 450 | * If we've just started the fsck, wait a tiny
|
---|
| 451 | * bit before sending the kill, to give it
|
---|
| 452 | * time to set up the signal handler
|
---|
| 453 | */
|
---|
| 454 | if (inst2->start_time >= time(NULL) - 1)
|
---|
| 455 | sleep(1);
|
---|
| 456 | kill(inst2->pid, SIGUSR1);
|
---|
| 457 | inst2->flags |= FLAG_PROGRESS;
|
---|
| 458 | break;
|
---|
| 459 | }
|
---|
| 460 | }
|
---|
| 461 | #endif
|
---|
| 462 |
|
---|
| 463 | if (prev)
|
---|
| 464 | prev->next = inst->next;
|
---|
| 465 | else
|
---|
| 466 | instance_list = inst->next;
|
---|
| 467 | if (verbose > 1)
|
---|
| 468 | printf("Finished with %s (exit status %d)\n",
|
---|
| 469 | inst->device, status);
|
---|
| 470 | num_running--;
|
---|
| 471 | free_instance(inst);
|
---|
| 472 |
|
---|
| 473 | return status;
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | /*
|
---|
| 477 | * Wait until all executing child processes have exited; return the
|
---|
| 478 | * logical OR of all of their exit code values.
|
---|
| 479 | */
|
---|
| 480 | #define FLAG_WAIT_ALL 0
|
---|
| 481 | #define FLAG_WAIT_ATLEAST_ONE WNOHANG
|
---|
| 482 | static int wait_many(int flags)
|
---|
| 483 | {
|
---|
| 484 | int exit_status;
|
---|
| 485 | int global_status = 0;
|
---|
| 486 | int wait_flags = 0;
|
---|
| 487 |
|
---|
| 488 | while ((exit_status = wait_one(wait_flags)) != -1) {
|
---|
| 489 | global_status |= exit_status;
|
---|
| 490 | wait_flags |= flags;
|
---|
| 491 | }
|
---|
| 492 | return global_status;
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 | /*
|
---|
| 496 | * Execute a particular fsck program, and link it into the list of
|
---|
| 497 | * child processes we are waiting for.
|
---|
| 498 | */
|
---|
| 499 | static void execute(const char *type, const char *device,
|
---|
| 500 | const char *mntpt /*, int interactive */)
|
---|
| 501 | {
|
---|
| 502 | int i;
|
---|
| 503 | struct fsck_instance *inst;
|
---|
| 504 | pid_t pid;
|
---|
| 505 |
|
---|
| 506 | args[0] = xasprintf("fsck.%s", type);
|
---|
| 507 |
|
---|
| 508 | #if DO_PROGRESS_INDICATOR
|
---|
| 509 | if (progress && !progress_active()) {
|
---|
| 510 | if (strcmp(type, "ext2") == 0
|
---|
| 511 | || strcmp(type, "ext3") == 0
|
---|
| 512 | ) {
|
---|
| 513 | args[XXX] = xasprintf("-C%d", progress_fd); /* 1 */
|
---|
| 514 | inst->flags |= FLAG_PROGRESS;
|
---|
| 515 | }
|
---|
| 516 | }
|
---|
| 517 | #endif
|
---|
| 518 |
|
---|
| 519 | args[num_args - 2] = (char*)device;
|
---|
| 520 | /* args[num_args - 1] = NULL; - already is */
|
---|
| 521 |
|
---|
| 522 | if (verbose || noexecute) {
|
---|
| 523 | printf("[%s (%d) -- %s]", args[0], num_running,
|
---|
| 524 | mntpt ? mntpt : device);
|
---|
| 525 | for (i = 0; args[i]; i++)
|
---|
| 526 | printf(" %s", args[i]);
|
---|
| 527 | bb_putchar('\n');
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | /* Fork and execute the correct program. */
|
---|
| 531 | pid = -1;
|
---|
| 532 | if (!noexecute) {
|
---|
| 533 | pid = spawn(args);
|
---|
| 534 | if (pid < 0)
|
---|
| 535 | bb_simple_perror_msg(args[0]);
|
---|
| 536 | }
|
---|
| 537 |
|
---|
| 538 | #if DO_PROGRESS_INDICATOR
|
---|
| 539 | free(args[XXX]);
|
---|
| 540 | #endif
|
---|
| 541 |
|
---|
| 542 | /* No child, so don't record an instance */
|
---|
| 543 | if (pid <= 0) {
|
---|
| 544 | free(args[0]);
|
---|
| 545 | return;
|
---|
| 546 | }
|
---|
| 547 |
|
---|
| 548 | inst = xzalloc(sizeof(*inst));
|
---|
| 549 | inst->pid = pid;
|
---|
| 550 | inst->prog = args[0];
|
---|
| 551 | inst->device = xstrdup(device);
|
---|
| 552 | inst->base_device = base_device(device);
|
---|
| 553 | #if DO_PROGRESS_INDICATOR
|
---|
| 554 | inst->start_time = time(NULL);
|
---|
| 555 | #endif
|
---|
| 556 |
|
---|
| 557 | /* Add to the list of running fsck's.
|
---|
| 558 | * (was adding to the end, but adding to the front is simpler...) */
|
---|
| 559 | inst->next = instance_list;
|
---|
| 560 | instance_list = inst;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | /*
|
---|
| 564 | * Run the fsck program on a particular device
|
---|
| 565 | *
|
---|
| 566 | * If the type is specified using -t, and it isn't prefixed with "no"
|
---|
| 567 | * (as in "noext2") and only one filesystem type is specified, then
|
---|
| 568 | * use that type regardless of what is specified in /etc/fstab.
|
---|
| 569 | *
|
---|
| 570 | * If the type isn't specified by the user, then use either the type
|
---|
| 571 | * specified in /etc/fstab, or "auto".
|
---|
| 572 | */
|
---|
| 573 | static void fsck_device(struct fs_info *fs /*, int interactive */)
|
---|
| 574 | {
|
---|
| 575 | const char *type;
|
---|
| 576 |
|
---|
| 577 | if (strcmp(fs->type, "auto") != 0) {
|
---|
| 578 | type = fs->type;
|
---|
| 579 | if (verbose > 2)
|
---|
| 580 | bb_info_msg("using filesystem type '%s' %s",
|
---|
| 581 | type, "from fstab");
|
---|
| 582 | } else if (fstype
|
---|
| 583 | && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */
|
---|
| 584 | && strncmp(fstype, "opts=", 5) != 0
|
---|
| 585 | && strncmp(fstype, "loop", 4) != 0
|
---|
| 586 | && !strchr(fstype, ',')
|
---|
| 587 | ) {
|
---|
| 588 | type = fstype;
|
---|
| 589 | if (verbose > 2)
|
---|
| 590 | bb_info_msg("using filesystem type '%s' %s",
|
---|
| 591 | type, "from -t");
|
---|
| 592 | } else {
|
---|
| 593 | type = "auto";
|
---|
| 594 | if (verbose > 2)
|
---|
| 595 | bb_info_msg("using filesystem type '%s' %s",
|
---|
| 596 | type, "(default)");
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 | num_running++;
|
---|
| 600 | execute(type, fs->device, fs->mountpt /*, interactive */);
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | /*
|
---|
| 604 | * Returns TRUE if a partition on the same disk is already being
|
---|
| 605 | * checked.
|
---|
| 606 | */
|
---|
| 607 | static int device_already_active(char *device)
|
---|
| 608 | {
|
---|
| 609 | struct fsck_instance *inst;
|
---|
| 610 | char *base;
|
---|
| 611 |
|
---|
| 612 | if (force_all_parallel)
|
---|
| 613 | return 0;
|
---|
| 614 |
|
---|
| 615 | #ifdef BASE_MD
|
---|
| 616 | /* Don't check a soft raid disk with any other disk */
|
---|
| 617 | if (instance_list
|
---|
| 618 | && (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1)
|
---|
| 619 | || !strncmp(device, BASE_MD, sizeof(BASE_MD)-1))
|
---|
| 620 | ) {
|
---|
| 621 | return 1;
|
---|
| 622 | }
|
---|
| 623 | #endif
|
---|
| 624 |
|
---|
| 625 | base = base_device(device);
|
---|
| 626 | /*
|
---|
| 627 | * If we don't know the base device, assume that the device is
|
---|
| 628 | * already active if there are any fsck instances running.
|
---|
| 629 | */
|
---|
| 630 | if (!base)
|
---|
| 631 | return (instance_list != NULL);
|
---|
| 632 |
|
---|
| 633 | for (inst = instance_list; inst; inst = inst->next) {
|
---|
| 634 | if (!inst->base_device || !strcmp(base, inst->base_device)) {
|
---|
| 635 | free(base);
|
---|
| 636 | return 1;
|
---|
| 637 | }
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 | free(base);
|
---|
| 641 | return 0;
|
---|
| 642 | }
|
---|
| 643 |
|
---|
| 644 | /*
|
---|
| 645 | * This function returns true if a particular option appears in a
|
---|
| 646 | * comma-delimited options list
|
---|
| 647 | */
|
---|
| 648 | static int opt_in_list(char *opt, char *optlist)
|
---|
| 649 | {
|
---|
| 650 | char *s;
|
---|
| 651 | int len;
|
---|
| 652 |
|
---|
| 653 | if (!optlist)
|
---|
| 654 | return 0;
|
---|
| 655 |
|
---|
| 656 | len = strlen(opt);
|
---|
| 657 | s = optlist - 1;
|
---|
| 658 | while (1) {
|
---|
| 659 | s = strstr(s + 1, opt);
|
---|
| 660 | if (!s)
|
---|
| 661 | return 0;
|
---|
| 662 | /* neither "opt.." nor "xxx,opt.."? */
|
---|
| 663 | if (s != optlist && s[-1] != ',')
|
---|
| 664 | continue;
|
---|
| 665 | /* neither "..opt" nor "..opt,xxx"? */
|
---|
| 666 | if (s[len] != '\0' && s[len] != ',')
|
---|
| 667 | continue;
|
---|
| 668 | return 1;
|
---|
| 669 | }
|
---|
| 670 | }
|
---|
| 671 |
|
---|
| 672 | /* See if the filesystem matches the criteria given by the -t option */
|
---|
| 673 | static int fs_match(struct fs_info *fs)
|
---|
| 674 | {
|
---|
| 675 | int n, ret, checked_type;
|
---|
| 676 | char *cp;
|
---|
| 677 |
|
---|
| 678 | if (!fs_type_list)
|
---|
| 679 | return 1;
|
---|
| 680 |
|
---|
| 681 | ret = 0;
|
---|
| 682 | checked_type = 0;
|
---|
| 683 | n = 0;
|
---|
| 684 | while (1) {
|
---|
| 685 | cp = fs_type_list[n];
|
---|
| 686 | if (!cp)
|
---|
| 687 | break;
|
---|
| 688 | switch (fs_type_flag[n]) {
|
---|
| 689 | case FS_TYPE_FLAG_NORMAL:
|
---|
| 690 | checked_type++;
|
---|
| 691 | if (strcmp(cp, fs->type) == 0)
|
---|
| 692 | ret = 1;
|
---|
| 693 | break;
|
---|
| 694 | case FS_TYPE_FLAG_NEGOPT:
|
---|
| 695 | if (opt_in_list(cp, fs->opts))
|
---|
| 696 | return 0;
|
---|
| 697 | break;
|
---|
| 698 | case FS_TYPE_FLAG_OPT:
|
---|
| 699 | if (!opt_in_list(cp, fs->opts))
|
---|
| 700 | return 0;
|
---|
| 701 | break;
|
---|
| 702 | }
|
---|
| 703 | n++;
|
---|
| 704 | }
|
---|
| 705 | if (checked_type == 0)
|
---|
| 706 | return 1;
|
---|
| 707 |
|
---|
| 708 | return (fs_type_negated ? !ret : ret);
|
---|
| 709 | }
|
---|
| 710 |
|
---|
| 711 | /* Check if we should ignore this filesystem. */
|
---|
| 712 | static int ignore(struct fs_info *fs)
|
---|
| 713 | {
|
---|
| 714 | /*
|
---|
| 715 | * If the pass number is 0, ignore it.
|
---|
| 716 | */
|
---|
| 717 | if (fs->passno == 0)
|
---|
| 718 | return 1;
|
---|
| 719 |
|
---|
| 720 | /*
|
---|
| 721 | * If a specific fstype is specified, and it doesn't match,
|
---|
| 722 | * ignore it.
|
---|
| 723 | */
|
---|
| 724 | if (!fs_match(fs))
|
---|
| 725 | return 1;
|
---|
| 726 |
|
---|
| 727 | /* Are we ignoring this type? */
|
---|
| 728 | if (index_in_strings(ignored_types, fs->type) >= 0)
|
---|
| 729 | return 1;
|
---|
| 730 |
|
---|
| 731 | /* We can and want to check this file system type. */
|
---|
| 732 | return 0;
|
---|
| 733 | }
|
---|
| 734 |
|
---|
| 735 | /* Check all file systems, using the /etc/fstab table. */
|
---|
| 736 | static int check_all(void)
|
---|
| 737 | {
|
---|
| 738 | struct fs_info *fs;
|
---|
| 739 | int status = EXIT_OK;
|
---|
| 740 | smallint not_done_yet;
|
---|
| 741 | smallint pass_done;
|
---|
| 742 | int passno;
|
---|
| 743 |
|
---|
| 744 | if (verbose)
|
---|
| 745 | puts("Checking all filesystems");
|
---|
| 746 |
|
---|
| 747 | /*
|
---|
| 748 | * Do an initial scan over the filesystem; mark filesystems
|
---|
| 749 | * which should be ignored as done, and resolve any "auto"
|
---|
| 750 | * filesystem types (done as a side-effect of calling ignore()).
|
---|
| 751 | */
|
---|
| 752 | for (fs = filesys_info; fs; fs = fs->next)
|
---|
| 753 | if (ignore(fs))
|
---|
| 754 | fs->flags |= FLAG_DONE;
|
---|
| 755 |
|
---|
| 756 | /*
|
---|
| 757 | * Find and check the root filesystem.
|
---|
| 758 | */
|
---|
| 759 | if (!parallel_root) {
|
---|
| 760 | for (fs = filesys_info; fs; fs = fs->next) {
|
---|
| 761 | if (LONE_CHAR(fs->mountpt, '/')) {
|
---|
| 762 | if (!skip_root && !ignore(fs)) {
|
---|
| 763 | fsck_device(fs /*, 1*/);
|
---|
| 764 | status |= wait_many(FLAG_WAIT_ALL);
|
---|
| 765 | if (status > EXIT_NONDESTRUCT)
|
---|
| 766 | return status;
|
---|
| 767 | }
|
---|
| 768 | fs->flags |= FLAG_DONE;
|
---|
| 769 | break;
|
---|
| 770 | }
|
---|
| 771 | }
|
---|
| 772 | }
|
---|
| 773 | /*
|
---|
| 774 | * This is for the bone-headed user who has root
|
---|
| 775 | * filesystem listed twice.
|
---|
| 776 | * "Skip root" will skip _all_ root entries.
|
---|
| 777 | */
|
---|
| 778 | if (skip_root)
|
---|
| 779 | for (fs = filesys_info; fs; fs = fs->next)
|
---|
| 780 | if (LONE_CHAR(fs->mountpt, '/'))
|
---|
| 781 | fs->flags |= FLAG_DONE;
|
---|
| 782 |
|
---|
| 783 | not_done_yet = 1;
|
---|
| 784 | passno = 1;
|
---|
| 785 | while (not_done_yet) {
|
---|
| 786 | not_done_yet = 0;
|
---|
| 787 | pass_done = 1;
|
---|
| 788 |
|
---|
| 789 | for (fs = filesys_info; fs; fs = fs->next) {
|
---|
| 790 | if (bb_got_signal)
|
---|
| 791 | break;
|
---|
| 792 | if (fs->flags & FLAG_DONE)
|
---|
| 793 | continue;
|
---|
| 794 | /*
|
---|
| 795 | * If the filesystem's pass number is higher
|
---|
| 796 | * than the current pass number, then we didn't
|
---|
| 797 | * do it yet.
|
---|
| 798 | */
|
---|
| 799 | if (fs->passno > passno) {
|
---|
| 800 | not_done_yet = 1;
|
---|
| 801 | continue;
|
---|
| 802 | }
|
---|
| 803 | /*
|
---|
| 804 | * If a filesystem on a particular device has
|
---|
| 805 | * already been spawned, then we need to defer
|
---|
| 806 | * this to another pass.
|
---|
| 807 | */
|
---|
| 808 | if (device_already_active(fs->device)) {
|
---|
| 809 | pass_done = 0;
|
---|
| 810 | continue;
|
---|
| 811 | }
|
---|
| 812 | /*
|
---|
| 813 | * Spawn off the fsck process
|
---|
| 814 | */
|
---|
| 815 | fsck_device(fs /*, serialize*/);
|
---|
| 816 | fs->flags |= FLAG_DONE;
|
---|
| 817 |
|
---|
| 818 | /*
|
---|
| 819 | * Only do one filesystem at a time, or if we
|
---|
| 820 | * have a limit on the number of fsck's extant
|
---|
| 821 | * at one time, apply that limit.
|
---|
| 822 | */
|
---|
| 823 | if (serialize
|
---|
| 824 | || (max_running && (num_running >= max_running))
|
---|
| 825 | ) {
|
---|
| 826 | pass_done = 0;
|
---|
| 827 | break;
|
---|
| 828 | }
|
---|
| 829 | }
|
---|
| 830 | if (bb_got_signal)
|
---|
| 831 | break;
|
---|
| 832 | if (verbose > 1)
|
---|
| 833 | printf("--waiting-- (pass %d)\n", passno);
|
---|
| 834 | status |= wait_many(pass_done ? FLAG_WAIT_ALL :
|
---|
| 835 | FLAG_WAIT_ATLEAST_ONE);
|
---|
| 836 | if (pass_done) {
|
---|
| 837 | if (verbose > 1)
|
---|
| 838 | puts("----------------------------------");
|
---|
| 839 | passno++;
|
---|
| 840 | } else
|
---|
| 841 | not_done_yet = 1;
|
---|
| 842 | }
|
---|
| 843 | kill_all_if_got_signal();
|
---|
| 844 | status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
|
---|
| 845 | return status;
|
---|
| 846 | }
|
---|
| 847 |
|
---|
| 848 | /*
|
---|
| 849 | * Deal with the fsck -t argument.
|
---|
| 850 | * Huh, for mount "-t novfat,nfs" means "neither vfat nor nfs"!
|
---|
| 851 | * Why here we require "-t novfat,nonfs" ??
|
---|
| 852 | */
|
---|
| 853 | static void compile_fs_type(char *fs_type)
|
---|
| 854 | {
|
---|
| 855 | char *s;
|
---|
| 856 | int num = 2;
|
---|
| 857 | smallint negate;
|
---|
| 858 |
|
---|
| 859 | s = fs_type;
|
---|
| 860 | while ((s = strchr(s, ','))) {
|
---|
| 861 | num++;
|
---|
| 862 | s++;
|
---|
| 863 | }
|
---|
| 864 |
|
---|
| 865 | fs_type_list = xzalloc(num * sizeof(fs_type_list[0]));
|
---|
| 866 | fs_type_flag = xzalloc(num * sizeof(fs_type_flag[0]));
|
---|
| 867 | fs_type_negated = -1; /* not yet known is it negated or not */
|
---|
| 868 |
|
---|
| 869 | num = 0;
|
---|
| 870 | s = fs_type;
|
---|
| 871 | while (1) {
|
---|
| 872 | char *comma;
|
---|
| 873 |
|
---|
| 874 | negate = 0;
|
---|
| 875 | if (s[0] == 'n' && s[1] == 'o') { /* "no.." */
|
---|
| 876 | s += 2;
|
---|
| 877 | negate = 1;
|
---|
| 878 | } else if (s[0] == '!') {
|
---|
| 879 | s++;
|
---|
| 880 | negate = 1;
|
---|
| 881 | }
|
---|
| 882 |
|
---|
| 883 | if (strcmp(s, "loop") == 0)
|
---|
| 884 | /* loop is really short-hand for opts=loop */
|
---|
| 885 | goto loop_special_case;
|
---|
| 886 | if (strncmp(s, "opts=", 5) == 0) {
|
---|
| 887 | s += 5;
|
---|
| 888 | loop_special_case:
|
---|
| 889 | fs_type_flag[num] = negate ? FS_TYPE_FLAG_NEGOPT : FS_TYPE_FLAG_OPT;
|
---|
| 890 | } else {
|
---|
| 891 | if (fs_type_negated == -1)
|
---|
| 892 | fs_type_negated = negate;
|
---|
| 893 | if (fs_type_negated != negate)
|
---|
| 894 | bb_error_msg_and_die(
|
---|
| 895 | "either all or none of the filesystem types passed to -t must be prefixed "
|
---|
| 896 | "with 'no' or '!'");
|
---|
| 897 | }
|
---|
| 898 | comma = strchr(s, ',');
|
---|
| 899 | fs_type_list[num++] = comma ? xstrndup(s, comma-s) : xstrdup(s);
|
---|
| 900 | if (!comma)
|
---|
| 901 | break;
|
---|
| 902 | s = comma + 1;
|
---|
| 903 | }
|
---|
| 904 | }
|
---|
| 905 |
|
---|
| 906 | static char **new_args(void)
|
---|
| 907 | {
|
---|
| 908 | args = xrealloc_vector(args, 2, num_args);
|
---|
| 909 | return &args[num_args++];
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 | int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 913 | int fsck_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 914 | {
|
---|
| 915 | int i, status;
|
---|
| 916 | /*int interactive;*/
|
---|
| 917 | struct fs_info *fs;
|
---|
| 918 | const char *fstab;
|
---|
| 919 | char *tmp;
|
---|
| 920 | char **devices;
|
---|
| 921 | int num_devices;
|
---|
| 922 | smallint opts_for_fsck;
|
---|
| 923 | smallint doall;
|
---|
| 924 | smallint notitle;
|
---|
| 925 |
|
---|
| 926 | /* we want wait() to be interruptible */
|
---|
| 927 | signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
|
---|
| 928 | signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo);
|
---|
| 929 |
|
---|
| 930 | setbuf(stdout, NULL);
|
---|
| 931 |
|
---|
| 932 | opts_for_fsck = doall = notitle = 0;
|
---|
| 933 | devices = NULL;
|
---|
| 934 | num_devices = 0;
|
---|
| 935 | new_args(); /* args[0] = NULL, will be replaced by fsck.<type> */
|
---|
| 936 | /* instance_list = NULL; - in bss, so already zeroed */
|
---|
| 937 |
|
---|
| 938 | while (*++argv) {
|
---|
| 939 | int j;
|
---|
| 940 | int optpos;
|
---|
| 941 | char *options;
|
---|
| 942 | char *arg = *argv;
|
---|
| 943 |
|
---|
| 944 | /* "/dev/blk" or "/path" or "UUID=xxx" or "LABEL=xxx" */
|
---|
| 945 | if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
|
---|
| 946 | // FIXME: must check that arg is a blkdev, or resolve
|
---|
| 947 | // "/path", "UUID=xxx" or "LABEL=xxx" into block device name
|
---|
| 948 | // ("UUID=xxx"/"LABEL=xxx" can probably shifted to fsck.auto duties)
|
---|
| 949 | devices = xrealloc_vector(devices, 2, num_devices);
|
---|
| 950 | devices[num_devices++] = arg;
|
---|
| 951 | continue;
|
---|
| 952 | }
|
---|
| 953 |
|
---|
| 954 | if (arg[0] != '-' || opts_for_fsck) {
|
---|
| 955 | *new_args() = arg;
|
---|
| 956 | continue;
|
---|
| 957 | }
|
---|
| 958 |
|
---|
| 959 | if (LONE_CHAR(arg + 1, '-')) { /* "--" ? */
|
---|
| 960 | opts_for_fsck = 1;
|
---|
| 961 | continue;
|
---|
| 962 | }
|
---|
| 963 |
|
---|
| 964 | optpos = 0;
|
---|
| 965 | options = NULL;
|
---|
| 966 | for (j = 1; arg[j]; j++) {
|
---|
| 967 | switch (arg[j]) {
|
---|
| 968 | case 'A':
|
---|
| 969 | doall = 1;
|
---|
| 970 | break;
|
---|
| 971 | #if DO_PROGRESS_INDICATOR
|
---|
| 972 | case 'C':
|
---|
| 973 | progress = 1;
|
---|
| 974 | if (arg[++j]) { /* -Cn */
|
---|
| 975 | progress_fd = xatoi_positive(&arg[j]);
|
---|
| 976 | goto next_arg;
|
---|
| 977 | }
|
---|
| 978 | /* -C n */
|
---|
| 979 | if (!*++argv)
|
---|
| 980 | bb_show_usage();
|
---|
| 981 | progress_fd = xatoi_positive(*argv);
|
---|
| 982 | goto next_arg;
|
---|
| 983 | #endif
|
---|
| 984 | case 'V':
|
---|
| 985 | verbose++;
|
---|
| 986 | break;
|
---|
| 987 | case 'N':
|
---|
| 988 | noexecute = 1;
|
---|
| 989 | break;
|
---|
| 990 | case 'R':
|
---|
| 991 | skip_root = 1;
|
---|
| 992 | break;
|
---|
| 993 | case 'T':
|
---|
| 994 | notitle = 1;
|
---|
| 995 | break;
|
---|
| 996 | /* case 'M':
|
---|
| 997 | like_mount = 1;
|
---|
| 998 | break; */
|
---|
| 999 | case 'P':
|
---|
| 1000 | parallel_root = 1;
|
---|
| 1001 | break;
|
---|
| 1002 | case 's':
|
---|
| 1003 | serialize = 1;
|
---|
| 1004 | break;
|
---|
| 1005 | case 't':
|
---|
| 1006 | if (fstype)
|
---|
| 1007 | bb_show_usage();
|
---|
| 1008 | if (arg[++j])
|
---|
| 1009 | tmp = &arg[j];
|
---|
| 1010 | else if (*++argv)
|
---|
| 1011 | tmp = *argv;
|
---|
| 1012 | else
|
---|
| 1013 | bb_show_usage();
|
---|
| 1014 | fstype = xstrdup(tmp);
|
---|
| 1015 | compile_fs_type(fstype);
|
---|
| 1016 | goto next_arg;
|
---|
| 1017 | case '?':
|
---|
| 1018 | bb_show_usage();
|
---|
| 1019 | break;
|
---|
| 1020 | default:
|
---|
| 1021 | optpos++;
|
---|
| 1022 | /* one extra for '\0' */
|
---|
| 1023 | options = xrealloc(options, optpos + 2);
|
---|
| 1024 | options[optpos] = arg[j];
|
---|
| 1025 | break;
|
---|
| 1026 | }
|
---|
| 1027 | }
|
---|
| 1028 | next_arg:
|
---|
| 1029 | if (optpos) {
|
---|
| 1030 | options[0] = '-';
|
---|
| 1031 | options[optpos + 1] = '\0';
|
---|
| 1032 | *new_args() = options;
|
---|
| 1033 | }
|
---|
| 1034 | }
|
---|
| 1035 | if (getenv("FSCK_FORCE_ALL_PARALLEL"))
|
---|
| 1036 | force_all_parallel = 1;
|
---|
| 1037 | tmp = getenv("FSCK_MAX_INST");
|
---|
| 1038 | if (tmp)
|
---|
| 1039 | max_running = xatoi(tmp);
|
---|
| 1040 | new_args(); /* args[num_args - 2] will be replaced by <device> */
|
---|
| 1041 | new_args(); /* args[num_args - 1] is the last, NULL element */
|
---|
| 1042 |
|
---|
| 1043 | if (!notitle)
|
---|
| 1044 | puts("fsck (busybox "BB_VER", "BB_BT")");
|
---|
| 1045 |
|
---|
| 1046 | /* Even plain "fsck /dev/hda1" needs fstab to get fs type,
|
---|
| 1047 | * so we are scanning it anyway */
|
---|
| 1048 | fstab = getenv("FSTAB_FILE");
|
---|
| 1049 | if (!fstab)
|
---|
| 1050 | fstab = "/etc/fstab";
|
---|
| 1051 | load_fs_info(fstab);
|
---|
| 1052 |
|
---|
| 1053 | /*interactive = (num_devices == 1) | serialize;*/
|
---|
| 1054 |
|
---|
| 1055 | if (num_devices == 0)
|
---|
| 1056 | /*interactive =*/ serialize = doall = 1;
|
---|
| 1057 | if (doall)
|
---|
| 1058 | return check_all();
|
---|
| 1059 |
|
---|
| 1060 | status = 0;
|
---|
| 1061 | for (i = 0; i < num_devices; i++) {
|
---|
| 1062 | if (bb_got_signal) {
|
---|
| 1063 | kill_all_if_got_signal();
|
---|
| 1064 | break;
|
---|
| 1065 | }
|
---|
| 1066 |
|
---|
| 1067 | fs = lookup(devices[i]);
|
---|
| 1068 | if (!fs)
|
---|
| 1069 | fs = create_fs_device(devices[i], "", "auto", NULL, -1);
|
---|
| 1070 | fsck_device(fs /*, interactive */);
|
---|
| 1071 |
|
---|
| 1072 | if (serialize
|
---|
| 1073 | || (max_running && (num_running >= max_running))
|
---|
| 1074 | ) {
|
---|
| 1075 | int exit_status = wait_one(0);
|
---|
| 1076 | if (exit_status >= 0)
|
---|
| 1077 | status |= exit_status;
|
---|
| 1078 | if (verbose > 1)
|
---|
| 1079 | puts("----------------------------------");
|
---|
| 1080 | }
|
---|
| 1081 | }
|
---|
| 1082 | status |= wait_many(FLAG_WAIT_ALL);
|
---|
| 1083 | return status;
|
---|
| 1084 | }
|
---|