1 | /*
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2 | * tune2fs.c - Change the file system parameters on an ext2 file system
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3 | *
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4 | * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
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5 | * Laboratoire MASI, Institut Blaise Pascal
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6 | * Universite Pierre et Marie Curie (Paris VI)
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7 | *
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8 | * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
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9 | *
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10 | * %Begin-Header%
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11 | * This file may be redistributed under the terms of the GNU Public
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12 | * License.
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13 | * %End-Header%
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14 | */
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15 |
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16 | /*
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17 | * History:
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18 | * 93/06/01 - Creation
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19 | * 93/10/31 - Added the -c option to change the maximal mount counts
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20 | * 93/12/14 - Added -l flag to list contents of superblock
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21 | * M.J.E. Mol (marcel@duteca.et.tudelft.nl)
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22 | * F.W. ten Wolde (franky@duteca.et.tudelft.nl)
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23 | * 93/12/29 - Added the -e option to change errors behavior
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24 | * 94/02/27 - Ported to use the ext2fs library
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25 | * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de)
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26 | */
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27 |
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28 | #include <sys/types.h>
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29 | #include <fcntl.h>
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30 | #include <stdio.h>
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31 | #include <stdlib.h>
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32 | #include <string.h>
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33 | #include <time.h>
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34 | #include <unistd.h>
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35 | #include <getopt.h>
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36 |
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37 | #include "e2fsbb.h"
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38 | #include "ext2fs/ext2_fs.h"
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39 | #include "ext2fs/ext2fs.h"
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40 | #include "uuid/uuid.h"
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41 | #include "e2p/e2p.h"
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42 | #include "ext2fs/kernel-jbd.h"
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43 | #include "util.h"
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44 | #include "blkid/blkid.h"
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45 |
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46 | #include "busybox.h"
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47 | #include "grp_.h"
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48 | #include "pwd_.h"
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49 |
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50 | static char * device_name = NULL;
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51 | static char * new_label, *new_last_mounted, *new_UUID;
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52 | static char * io_options;
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53 | static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag;
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54 | static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag;
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55 | static time_t last_check_time;
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56 | static int print_label;
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57 | static int max_mount_count, mount_count, mount_flags;
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58 | static unsigned long interval, reserved_ratio, reserved_blocks;
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59 | static unsigned long resgid, resuid;
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60 | static unsigned short errors;
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61 | static int open_flag;
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62 | static char *features_cmd;
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63 | static char *mntopts_cmd;
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64 |
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65 | static int journal_size, journal_flags;
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66 | static char *journal_device = NULL;
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67 |
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68 | static const char *please_fsck = "Please run e2fsck on the filesystem\n";
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69 |
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70 | static __u32 ok_features[3] = {
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71 | EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX,
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72 | EXT2_FEATURE_INCOMPAT_FILETYPE,
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73 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
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74 | };
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75 |
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76 | /*
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77 | * Remove an external journal from the filesystem
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78 | */
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79 | static void remove_journal_device(ext2_filsys fs)
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80 | {
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81 | char *journal_path;
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82 | ext2_filsys jfs;
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83 | char buf[1024];
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84 | journal_superblock_t *jsb;
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85 | int i, nr_users;
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86 | errcode_t retval;
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87 | int commit_remove_journal = 0;
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88 | io_manager io_ptr;
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89 |
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90 | if (f_flag)
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91 | commit_remove_journal = 1; /* force removal even if error */
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92 |
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93 | uuid_unparse(fs->super->s_journal_uuid, buf);
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94 | journal_path = blkid_get_devname(NULL, "UUID", buf);
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95 |
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96 | if (!journal_path) {
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97 | journal_path =
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98 | ext2fs_find_block_device(fs->super->s_journal_dev);
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99 | if (!journal_path)
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100 | return;
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101 | }
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102 |
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103 | io_ptr = unix_io_manager;
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104 | retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
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105 | EXT2_FLAG_JOURNAL_DEV_OK, 0,
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106 | fs->blocksize, io_ptr, &jfs);
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107 | if (retval) {
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108 | bb_error_msg("Failed to open external journal");
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109 | goto no_valid_journal;
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110 | }
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111 | if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
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112 | bb_error_msg("%s is not a journal device", journal_path);
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113 | goto no_valid_journal;
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114 | }
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115 |
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116 | /* Get the journal superblock */
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117 | if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
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118 | bb_error_msg("Failed to read journal superblock");
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119 | goto no_valid_journal;
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120 | }
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121 |
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122 | jsb = (journal_superblock_t *) buf;
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123 | if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
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124 | (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
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125 | bb_error_msg("Journal superblock not found!");
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126 | goto no_valid_journal;
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127 | }
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128 |
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129 | /* Find the filesystem UUID */
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130 | nr_users = ntohl(jsb->s_nr_users);
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131 | for (i=0; i < nr_users; i++) {
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132 | if (memcmp(fs->super->s_uuid,
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133 | &jsb->s_users[i*16], 16) == 0)
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134 | break;
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135 | }
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136 | if (i >= nr_users) {
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137 | bb_error_msg("Filesystem's UUID not found on journal device");
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138 | commit_remove_journal = 1;
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139 | goto no_valid_journal;
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140 | }
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141 | nr_users--;
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142 | for (i=0; i < nr_users; i++)
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143 | memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
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144 | jsb->s_nr_users = htonl(nr_users);
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145 |
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146 | /* Write back the journal superblock */
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147 | if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
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148 | bb_error_msg("Failed to write journal superblock");
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149 | goto no_valid_journal;
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150 | }
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151 |
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152 | commit_remove_journal = 1;
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153 |
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154 | no_valid_journal:
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155 | if (commit_remove_journal == 0)
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156 | bb_error_msg_and_die("Journal NOT removed");
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157 | fs->super->s_journal_dev = 0;
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158 | uuid_clear(fs->super->s_journal_uuid);
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159 | ext2fs_mark_super_dirty(fs);
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160 | puts("Journal removed");
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161 | free(journal_path);
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162 | }
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163 |
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164 | /* Helper function for remove_journal_inode */
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165 | static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
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166 | int blockcnt EXT2FS_ATTR((unused)),
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167 | void *private EXT2FS_ATTR((unused)))
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168 | {
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169 | blk_t block;
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170 | int group;
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171 |
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172 | block = *blocknr;
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173 | ext2fs_unmark_block_bitmap(fs->block_map,block);
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174 | group = ext2fs_group_of_blk(fs, block);
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175 | fs->group_desc[group].bg_free_blocks_count++;
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176 | fs->super->s_free_blocks_count++;
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177 | return 0;
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178 | }
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179 |
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180 | /*
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181 | * Remove the journal inode from the filesystem
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182 | */
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183 | static void remove_journal_inode(ext2_filsys fs)
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184 | {
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185 | struct ext2_inode inode;
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186 | errcode_t retval;
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187 | ino_t ino = fs->super->s_journal_inum;
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188 | char *msg = "to read";
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189 | char *s = "journal inode";
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190 |
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191 | retval = ext2fs_read_inode(fs, ino, &inode);
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192 | if (retval)
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193 | goto REMOVE_JOURNAL_INODE_ERROR;
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194 | if (ino == EXT2_JOURNAL_INO) {
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195 | retval = ext2fs_read_bitmaps(fs);
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196 | if (retval) {
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197 | msg = "to read bitmaps";
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198 | s = "";
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199 | goto REMOVE_JOURNAL_INODE_ERROR;
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200 | }
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201 | retval = ext2fs_block_iterate(fs, ino, 0, NULL,
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202 | release_blocks_proc, NULL);
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203 | if (retval) {
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204 | msg = "clearing";
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205 | goto REMOVE_JOURNAL_INODE_ERROR;
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206 | }
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207 | memset(&inode, 0, sizeof(inode));
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208 | ext2fs_mark_bb_dirty(fs);
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209 | fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
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210 | } else
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211 | inode.i_flags &= ~EXT2_IMMUTABLE_FL;
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212 | retval = ext2fs_write_inode(fs, ino, &inode);
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213 | if (retval) {
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214 | msg = "writing";
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215 | REMOVE_JOURNAL_INODE_ERROR:
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216 | bb_error_msg_and_die("Failed %s %s", msg, s);
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217 | }
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218 | fs->super->s_journal_inum = 0;
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219 | ext2fs_mark_super_dirty(fs);
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220 | }
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221 |
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222 | /*
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223 | * Update the default mount options
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224 | */
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225 | static void update_mntopts(ext2_filsys fs, char *mntopts)
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226 | {
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227 | struct ext2_super_block *sb= fs->super;
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228 |
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229 | if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0))
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230 | bb_error_msg_and_die("Invalid mount option set: %s", mntopts);
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231 | ext2fs_mark_super_dirty(fs);
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232 | }
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233 |
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234 | /*
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235 | * Update the feature set as provided by the user.
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236 | */
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237 | static void update_feature_set(ext2_filsys fs, char *features)
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238 | {
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239 | int sparse, old_sparse, filetype, old_filetype;
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240 | int journal, old_journal, dxdir, old_dxdir;
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241 | struct ext2_super_block *sb= fs->super;
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242 | __u32 old_compat, old_incompat, old_ro_compat;
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243 |
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244 | old_compat = sb->s_feature_compat;
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245 | old_ro_compat = sb->s_feature_ro_compat;
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246 | old_incompat = sb->s_feature_incompat;
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247 |
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248 | old_sparse = sb->s_feature_ro_compat &
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249 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
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250 | old_filetype = sb->s_feature_incompat &
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251 | EXT2_FEATURE_INCOMPAT_FILETYPE;
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252 | old_journal = sb->s_feature_compat &
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253 | EXT3_FEATURE_COMPAT_HAS_JOURNAL;
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254 | old_dxdir = sb->s_feature_compat &
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255 | EXT2_FEATURE_COMPAT_DIR_INDEX;
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256 | if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features))
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257 | bb_error_msg_and_die("Invalid filesystem option set: %s", features);
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258 | sparse = sb->s_feature_ro_compat &
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259 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
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260 | filetype = sb->s_feature_incompat &
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261 | EXT2_FEATURE_INCOMPAT_FILETYPE;
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262 | journal = sb->s_feature_compat &
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263 | EXT3_FEATURE_COMPAT_HAS_JOURNAL;
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264 | dxdir = sb->s_feature_compat &
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265 | EXT2_FEATURE_COMPAT_DIR_INDEX;
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266 | if (old_journal && !journal) {
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267 | if ((mount_flags & EXT2_MF_MOUNTED) &&
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268 | !(mount_flags & EXT2_MF_READONLY)) {
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269 | bb_error_msg_and_die(
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270 | "The has_journal flag may only be "
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271 | "cleared when the filesystem is\n"
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272 | "unmounted or mounted "
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273 | "read-only");
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274 | }
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275 | if (sb->s_feature_incompat &
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276 | EXT3_FEATURE_INCOMPAT_RECOVER) {
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277 | bb_error_msg_and_die(
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278 | "The needs_recovery flag is set. "
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279 | "%s before clearing the has_journal flag.",
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280 | please_fsck);
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281 | }
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282 | if (sb->s_journal_inum) {
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283 | remove_journal_inode(fs);
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284 | }
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285 | if (sb->s_journal_dev) {
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286 | remove_journal_device(fs);
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287 | }
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288 | }
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289 | if (journal && !old_journal) {
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290 | /*
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291 | * If adding a journal flag, let the create journal
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292 | * code below handle creating setting the flag and
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293 | * creating the journal. We supply a default size if
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294 | * necessary.
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295 | */
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296 | if (!journal_size)
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297 | journal_size = -1;
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298 | sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
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299 | }
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300 | if (dxdir && !old_dxdir) {
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301 | if (!sb->s_def_hash_version)
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302 | sb->s_def_hash_version = EXT2_HASH_TEA;
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303 | if (uuid_is_null((unsigned char *) sb->s_hash_seed))
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304 | uuid_generate((unsigned char *) sb->s_hash_seed);
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305 | }
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306 |
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307 | if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
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308 | (sb->s_feature_compat || sb->s_feature_ro_compat ||
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309 | sb->s_feature_incompat))
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310 | ext2fs_update_dynamic_rev(fs);
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311 | if ((sparse != old_sparse) ||
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312 | (filetype != old_filetype)) {
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313 | sb->s_state &= ~EXT2_VALID_FS;
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314 | printf("\n%s\n", please_fsck);
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315 | }
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316 | if ((old_compat != sb->s_feature_compat) ||
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317 | (old_ro_compat != sb->s_feature_ro_compat) ||
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318 | (old_incompat != sb->s_feature_incompat))
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319 | ext2fs_mark_super_dirty(fs);
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320 | }
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321 |
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322 | /*
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323 | * Add a journal to the filesystem.
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324 | */
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325 | static void add_journal(ext2_filsys fs)
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326 | {
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327 | if (fs->super->s_feature_compat &
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328 | EXT3_FEATURE_COMPAT_HAS_JOURNAL) {
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329 | bb_error_msg_and_die("The filesystem already has a journal");
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330 | }
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331 | if (journal_device) {
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332 | make_journal_device(journal_device, fs, 0, 0);
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333 | } else if (journal_size) {
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334 | make_journal_blocks(fs, journal_size, journal_flags, 0);
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335 | /*
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336 | * If the filesystem wasn't mounted, we need to force
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337 | * the block group descriptors out.
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338 | */
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339 | if ((mount_flags & EXT2_MF_MOUNTED) == 0)
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340 | fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
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341 | }
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342 | print_check_message(fs);
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343 | return;
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344 | }
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345 |
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346 | /*
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347 | * Busybox stuff
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348 | */
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349 | static char * x_blkid_get_devname(const char *token)
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350 | {
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351 | char * dev_name;
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352 |
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353 | if (!(dev_name = blkid_get_devname(NULL, token, NULL)))
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354 | bb_error_msg_and_die("Unable to resolve '%s'", token);
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355 | return dev_name;
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356 | }
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357 |
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358 | #ifdef CONFIG_E2LABEL
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359 | static void parse_e2label_options(int argc, char ** argv)
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360 | {
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361 | if ((argc < 2) || (argc > 3))
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362 | bb_show_usage();
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363 | io_options = strchr(argv[1], '?');
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364 | if (io_options)
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365 | *io_options++ = 0;
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366 | device_name = x_blkid_get_devname(argv[1]);
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367 | if (argc == 3) {
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368 | open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK;
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369 | L_flag = 1;
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370 | new_label = argv[2];
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371 | } else
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372 | print_label++;
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373 | }
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374 | #else
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375 | #define parse_e2label_options(x,y)
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376 | #endif
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377 |
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378 | static time_t parse_time(char *str)
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379 | {
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380 | struct tm ts;
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381 |
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382 | if (strcmp(str, "now") == 0) {
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383 | return (time(0));
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384 | }
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385 | memset(&ts, 0, sizeof(ts));
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386 | #ifdef HAVE_STRPTIME
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387 | strptime(str, "%Y%m%d%H%M%S", &ts);
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388 | #else
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389 | sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon,
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390 | &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec);
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391 | ts.tm_year -= 1900;
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392 | ts.tm_mon -= 1;
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393 | if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 ||
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394 | ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 ||
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395 | ts.tm_min > 59 || ts.tm_sec > 61)
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396 | ts.tm_mday = 0;
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397 | #endif
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398 | if (ts.tm_mday == 0) {
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399 | bb_error_msg_and_die("Couldn't parse date/time specifier: %s", str);
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400 | }
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401 | return (mktime(&ts));
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402 | }
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403 |
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404 | static void parse_tune2fs_options(int argc, char **argv)
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405 | {
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406 | int c;
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407 | char * tmp;
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408 |
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409 | printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
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410 | while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF)
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411 | switch (c)
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412 | {
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413 | case 'c':
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414 | if (safe_strtoi(optarg, &max_mount_count) || max_mount_count > 16000) {
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415 | goto MOUNTS_COUNT_ERROR;
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416 | }
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417 | if (max_mount_count == 0)
|
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418 | max_mount_count = -1;
|
---|
419 | c_flag = 1;
|
---|
420 | open_flag = EXT2_FLAG_RW;
|
---|
421 | break;
|
---|
422 | case 'C':
|
---|
423 | if (safe_strtoi(optarg, &mount_count) || mount_count > 16000) {
|
---|
424 | MOUNTS_COUNT_ERROR:
|
---|
425 | bb_error_msg_and_die("bad mounts count - %s", optarg);
|
---|
426 | }
|
---|
427 | C_flag = 1;
|
---|
428 | open_flag = EXT2_FLAG_RW;
|
---|
429 | break;
|
---|
430 | case 'e':
|
---|
431 | if (strcmp (optarg, "continue") == 0)
|
---|
432 | errors = EXT2_ERRORS_CONTINUE;
|
---|
433 | else if (strcmp (optarg, "remount-ro") == 0)
|
---|
434 | errors = EXT2_ERRORS_RO;
|
---|
435 | else if (strcmp (optarg, "panic") == 0)
|
---|
436 | errors = EXT2_ERRORS_PANIC;
|
---|
437 | else {
|
---|
438 | bb_error_msg_and_die("bad error behavior - %s", optarg);
|
---|
439 | }
|
---|
440 | e_flag = 1;
|
---|
441 | open_flag = EXT2_FLAG_RW;
|
---|
442 | break;
|
---|
443 | case 'f': /* Force */
|
---|
444 | f_flag = 1;
|
---|
445 | break;
|
---|
446 | case 'g':
|
---|
447 | if (safe_strtoul(optarg, &resgid))
|
---|
448 | resgid = bb_xgetgrnam(optarg);
|
---|
449 | g_flag = 1;
|
---|
450 | open_flag = EXT2_FLAG_RW;
|
---|
451 | break;
|
---|
452 | case 'i':
|
---|
453 | interval = strtoul (optarg, &tmp, 0);
|
---|
454 | switch (*tmp) {
|
---|
455 | case 's':
|
---|
456 | tmp++;
|
---|
457 | break;
|
---|
458 | case '\0':
|
---|
459 | case 'd':
|
---|
460 | case 'D': /* days */
|
---|
461 | interval *= 86400;
|
---|
462 | if (*tmp != '\0')
|
---|
463 | tmp++;
|
---|
464 | break;
|
---|
465 | case 'm':
|
---|
466 | case 'M': /* months! */
|
---|
467 | interval *= 86400 * 30;
|
---|
468 | tmp++;
|
---|
469 | break;
|
---|
470 | case 'w':
|
---|
471 | case 'W': /* weeks */
|
---|
472 | interval *= 86400 * 7;
|
---|
473 | tmp++;
|
---|
474 | break;
|
---|
475 | }
|
---|
476 | if (*tmp || interval > (365 * 86400)) {
|
---|
477 | bb_error_msg_and_die("bad interval - %s", optarg);
|
---|
478 | }
|
---|
479 | i_flag = 1;
|
---|
480 | open_flag = EXT2_FLAG_RW;
|
---|
481 | break;
|
---|
482 | case 'j':
|
---|
483 | if (!journal_size)
|
---|
484 | journal_size = -1;
|
---|
485 | open_flag = EXT2_FLAG_RW;
|
---|
486 | break;
|
---|
487 | case 'J':
|
---|
488 | parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
|
---|
489 | open_flag = EXT2_FLAG_RW;
|
---|
490 | break;
|
---|
491 | case 'l':
|
---|
492 | l_flag = 1;
|
---|
493 | break;
|
---|
494 | case 'L':
|
---|
495 | new_label = optarg;
|
---|
496 | L_flag = 1;
|
---|
497 | open_flag = EXT2_FLAG_RW |
|
---|
498 | EXT2_FLAG_JOURNAL_DEV_OK;
|
---|
499 | break;
|
---|
500 | case 'm':
|
---|
501 | if(safe_strtoul(optarg, &reserved_ratio) || reserved_ratio > 50) {
|
---|
502 | bb_error_msg_and_die("bad reserved block ratio - %s", optarg);
|
---|
503 | }
|
---|
504 | m_flag = 1;
|
---|
505 | open_flag = EXT2_FLAG_RW;
|
---|
506 | break;
|
---|
507 | case 'M':
|
---|
508 | new_last_mounted = optarg;
|
---|
509 | M_flag = 1;
|
---|
510 | open_flag = EXT2_FLAG_RW;
|
---|
511 | break;
|
---|
512 | case 'o':
|
---|
513 | if (mntopts_cmd) {
|
---|
514 | bb_error_msg_and_die("-o may only be specified once");
|
---|
515 | }
|
---|
516 | mntopts_cmd = optarg;
|
---|
517 | open_flag = EXT2_FLAG_RW;
|
---|
518 | break;
|
---|
519 |
|
---|
520 | case 'O':
|
---|
521 | if (features_cmd) {
|
---|
522 | bb_error_msg_and_die("-O may only be specified once");
|
---|
523 | }
|
---|
524 | features_cmd = optarg;
|
---|
525 | open_flag = EXT2_FLAG_RW;
|
---|
526 | break;
|
---|
527 | case 'r':
|
---|
528 | if(safe_strtoul(optarg, &reserved_blocks)) {
|
---|
529 | bb_error_msg_and_die("bad reserved blocks count - %s", optarg);
|
---|
530 | }
|
---|
531 | r_flag = 1;
|
---|
532 | open_flag = EXT2_FLAG_RW;
|
---|
533 | break;
|
---|
534 | case 's':
|
---|
535 | s_flag = atoi(optarg);
|
---|
536 | open_flag = EXT2_FLAG_RW;
|
---|
537 | break;
|
---|
538 | case 'T':
|
---|
539 | T_flag = 1;
|
---|
540 | last_check_time = parse_time(optarg);
|
---|
541 | open_flag = EXT2_FLAG_RW;
|
---|
542 | break;
|
---|
543 | case 'u':
|
---|
544 | if (safe_strtoul(optarg, &resuid))
|
---|
545 | resuid = bb_xgetpwnam(optarg);
|
---|
546 | u_flag = 1;
|
---|
547 | open_flag = EXT2_FLAG_RW;
|
---|
548 | break;
|
---|
549 | case 'U':
|
---|
550 | new_UUID = optarg;
|
---|
551 | U_flag = 1;
|
---|
552 | open_flag = EXT2_FLAG_RW |
|
---|
553 | EXT2_FLAG_JOURNAL_DEV_OK;
|
---|
554 | break;
|
---|
555 | default:
|
---|
556 | bb_show_usage();
|
---|
557 | }
|
---|
558 | if (optind < argc - 1 || optind == argc)
|
---|
559 | bb_show_usage();
|
---|
560 | if (!open_flag && !l_flag)
|
---|
561 | bb_show_usage();
|
---|
562 | io_options = strchr(argv[optind], '?');
|
---|
563 | if (io_options)
|
---|
564 | *io_options++ = 0;
|
---|
565 | device_name = x_blkid_get_devname(argv[optind]);
|
---|
566 | }
|
---|
567 |
|
---|
568 | #ifdef CONFIG_FINDFS
|
---|
569 | static ATTRIBUTE_NORETURN void do_findfs(int argc, char **argv)
|
---|
570 | {
|
---|
571 | if ((argc != 2) ||
|
---|
572 | (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5)))
|
---|
573 | bb_show_usage();
|
---|
574 | device_name = x_blkid_get_devname(argv[1]);
|
---|
575 | puts(device_name);
|
---|
576 | exit(0);
|
---|
577 | }
|
---|
578 | #else
|
---|
579 | #define do_findfs(x, y)
|
---|
580 | #endif
|
---|
581 |
|
---|
582 | static void tune2fs_clean_up(void)
|
---|
583 | {
|
---|
584 | if (ENABLE_FEATURE_CLEAN_UP && device_name) free(device_name);
|
---|
585 | if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
|
---|
586 | }
|
---|
587 |
|
---|
588 | int tune2fs_main(int argc, char **argv)
|
---|
589 | {
|
---|
590 | errcode_t retval;
|
---|
591 | ext2_filsys fs;
|
---|
592 | struct ext2_super_block *sb;
|
---|
593 | io_manager io_ptr;
|
---|
594 |
|
---|
595 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
596 | atexit(tune2fs_clean_up);
|
---|
597 |
|
---|
598 | if (ENABLE_FINDFS && (bb_applet_name[0] == 'f')) /* findfs */
|
---|
599 | do_findfs(argc, argv); /* no return */
|
---|
600 | else if (ENABLE_E2LABEL && (bb_applet_name[0] == 'e')) /* e2label */
|
---|
601 | parse_e2label_options(argc, argv);
|
---|
602 | else
|
---|
603 | parse_tune2fs_options(argc, argv); /* tune2fs */
|
---|
604 |
|
---|
605 | io_ptr = unix_io_manager;
|
---|
606 | retval = ext2fs_open2(device_name, io_options, open_flag,
|
---|
607 | 0, 0, io_ptr, &fs);
|
---|
608 | if (retval)
|
---|
609 | bb_error_msg_and_die("No valid superblock on %s", device_name);
|
---|
610 | sb = fs->super;
|
---|
611 | if (print_label) {
|
---|
612 | /* For e2label emulation */
|
---|
613 | printf("%.*s\n", (int) sizeof(sb->s_volume_name),
|
---|
614 | sb->s_volume_name);
|
---|
615 | return 0;
|
---|
616 | }
|
---|
617 | retval = ext2fs_check_if_mounted(device_name, &mount_flags);
|
---|
618 | if (retval)
|
---|
619 | bb_error_msg_and_die("Could not determine if %s is mounted", device_name);
|
---|
620 | /* Normally we only need to write out the superblock */
|
---|
621 | fs->flags |= EXT2_FLAG_SUPER_ONLY;
|
---|
622 |
|
---|
623 | if (c_flag) {
|
---|
624 | sb->s_max_mnt_count = max_mount_count;
|
---|
625 | ext2fs_mark_super_dirty(fs);
|
---|
626 | printf("Setting maximal mount count to %d\n", max_mount_count);
|
---|
627 | }
|
---|
628 | if (C_flag) {
|
---|
629 | sb->s_mnt_count = mount_count;
|
---|
630 | ext2fs_mark_super_dirty(fs);
|
---|
631 | printf("Setting current mount count to %d\n", mount_count);
|
---|
632 | }
|
---|
633 | if (e_flag) {
|
---|
634 | sb->s_errors = errors;
|
---|
635 | ext2fs_mark_super_dirty(fs);
|
---|
636 | printf("Setting error behavior to %d\n", errors);
|
---|
637 | }
|
---|
638 | if (g_flag) {
|
---|
639 | sb->s_def_resgid = resgid;
|
---|
640 | ext2fs_mark_super_dirty(fs);
|
---|
641 | printf("Setting reserved blocks gid to %lu\n", resgid);
|
---|
642 | }
|
---|
643 | if (i_flag) {
|
---|
644 | sb->s_checkinterval = interval;
|
---|
645 | ext2fs_mark_super_dirty(fs);
|
---|
646 | printf("Setting interval between check %lu seconds\n", interval);
|
---|
647 | }
|
---|
648 | if (m_flag) {
|
---|
649 | sb->s_r_blocks_count = (sb->s_blocks_count / 100)
|
---|
650 | * reserved_ratio;
|
---|
651 | ext2fs_mark_super_dirty(fs);
|
---|
652 | printf("Setting reserved blocks percentage to %lu (%u blocks)\n",
|
---|
653 | reserved_ratio, sb->s_r_blocks_count);
|
---|
654 | }
|
---|
655 | if (r_flag) {
|
---|
656 | if (reserved_blocks >= sb->s_blocks_count/2)
|
---|
657 | bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks);
|
---|
658 | sb->s_r_blocks_count = reserved_blocks;
|
---|
659 | ext2fs_mark_super_dirty(fs);
|
---|
660 | printf("Setting reserved blocks count to %lu\n", reserved_blocks);
|
---|
661 | }
|
---|
662 | if (s_flag == 1) {
|
---|
663 | if (sb->s_feature_ro_compat &
|
---|
664 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)
|
---|
665 | bb_error_msg("\nThe filesystem already has sparse superblocks\n");
|
---|
666 | else {
|
---|
667 | sb->s_feature_ro_compat |=
|
---|
668 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
|
---|
669 | sb->s_state &= ~EXT2_VALID_FS;
|
---|
670 | ext2fs_mark_super_dirty(fs);
|
---|
671 | printf("\nSparse superblock flag set. %s", please_fsck);
|
---|
672 | }
|
---|
673 | }
|
---|
674 | if (s_flag == 0) {
|
---|
675 | if (!(sb->s_feature_ro_compat &
|
---|
676 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER))
|
---|
677 | bb_error_msg("\nThe filesystem already has sparse superblocks disabled\n");
|
---|
678 | else {
|
---|
679 | sb->s_feature_ro_compat &=
|
---|
680 | ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
|
---|
681 | sb->s_state &= ~EXT2_VALID_FS;
|
---|
682 | fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
|
---|
683 | ext2fs_mark_super_dirty(fs);
|
---|
684 | printf("\nSparse superblock flag cleared. %s", please_fsck);
|
---|
685 | }
|
---|
686 | }
|
---|
687 | if (T_flag) {
|
---|
688 | sb->s_lastcheck = last_check_time;
|
---|
689 | ext2fs_mark_super_dirty(fs);
|
---|
690 | printf("Setting time filesystem last checked to %s\n",
|
---|
691 | ctime(&last_check_time));
|
---|
692 | }
|
---|
693 | if (u_flag) {
|
---|
694 | sb->s_def_resuid = resuid;
|
---|
695 | ext2fs_mark_super_dirty(fs);
|
---|
696 | printf("Setting reserved blocks uid to %lu\n", resuid);
|
---|
697 | }
|
---|
698 | if (L_flag) {
|
---|
699 | if (strlen(new_label) > sizeof(sb->s_volume_name))
|
---|
700 | bb_error_msg("Warning: label too long, truncating\n");
|
---|
701 | memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name));
|
---|
702 | safe_strncpy(sb->s_volume_name, new_label,
|
---|
703 | sizeof(sb->s_volume_name));
|
---|
704 | ext2fs_mark_super_dirty(fs);
|
---|
705 | }
|
---|
706 | if (M_flag) {
|
---|
707 | memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted));
|
---|
708 | safe_strncpy(sb->s_last_mounted, new_last_mounted,
|
---|
709 | sizeof(sb->s_last_mounted));
|
---|
710 | ext2fs_mark_super_dirty(fs);
|
---|
711 | }
|
---|
712 | if (mntopts_cmd)
|
---|
713 | update_mntopts(fs, mntopts_cmd);
|
---|
714 | if (features_cmd)
|
---|
715 | update_feature_set(fs, features_cmd);
|
---|
716 | if (journal_size || journal_device)
|
---|
717 | add_journal(fs);
|
---|
718 |
|
---|
719 | if (U_flag) {
|
---|
720 | if ((strcasecmp(new_UUID, "null") == 0) ||
|
---|
721 | (strcasecmp(new_UUID, "clear") == 0)) {
|
---|
722 | uuid_clear(sb->s_uuid);
|
---|
723 | } else if (strcasecmp(new_UUID, "time") == 0) {
|
---|
724 | uuid_generate_time(sb->s_uuid);
|
---|
725 | } else if (strcasecmp(new_UUID, "random") == 0) {
|
---|
726 | uuid_generate(sb->s_uuid);
|
---|
727 | } else if (uuid_parse(new_UUID, sb->s_uuid)) {
|
---|
728 | bb_error_msg_and_die("Invalid UUID format");
|
---|
729 | }
|
---|
730 | ext2fs_mark_super_dirty(fs);
|
---|
731 | }
|
---|
732 |
|
---|
733 | if (l_flag)
|
---|
734 | list_super (sb);
|
---|
735 | return (ext2fs_close (fs) ? 1 : 0);
|
---|
736 | }
|
---|