Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * util.c --- helper functions used by tune2fs and mke2fs |
| 4 | * |
| 5 | * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. |
| 6 | * |
| 7 | * %Begin-Header% |
| 8 | * This file may be redistributed under the terms of the GNU Public |
| 9 | * License. |
| 10 | * %End-Header% |
| 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <string.h> |
| 15 | #include <errno.h> |
| 16 | #include <linux/major.h> |
| 17 | #include <sys/stat.h> |
| 18 | |
| 19 | #include "e2fsbb.h" |
| 20 | #include "e2p/e2p.h" |
| 21 | #include "ext2fs/ext2_fs.h" |
| 22 | #include "ext2fs/ext2fs.h" |
| 23 | #include "blkid/blkid.h" |
| 24 | #include "util.h" |
| 25 | |
| 26 | void proceed_question(void) |
| 27 | { |
| 28 | fputs("Proceed anyway? (y,n) ", stdout); |
| 29 | if (bb_ask_confirmation() == 0) |
| 30 | exit(1); |
| 31 | } |
| 32 | |
| 33 | void check_plausibility(const char *device, int force) |
| 34 | { |
| 35 | int val; |
| 36 | struct stat s; |
| 37 | val = stat(device, &s); |
| 38 | if (force) |
| 39 | return; |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 40 | if (val == -1) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 41 | bb_perror_msg_and_die("cannot stat %s", device); |
| 42 | if (!S_ISBLK(s.st_mode)) { |
| 43 | printf("%s is not a block special device.\n", device); |
| 44 | proceed_question(); |
| 45 | return; |
| 46 | } |
| 47 | |
| 48 | #ifdef HAVE_LINUX_MAJOR_H |
| 49 | #ifndef MAJOR |
| 50 | #define MAJOR(dev) ((dev)>>8) |
| 51 | #define MINOR(dev) ((dev) & 0xff) |
| 52 | #endif |
| 53 | #ifndef SCSI_BLK_MAJOR |
| 54 | #ifdef SCSI_DISK0_MAJOR |
| 55 | #ifdef SCSI_DISK8_MAJOR |
| 56 | #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ |
| 57 | ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \ |
| 58 | ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR)) |
| 59 | #else |
| 60 | #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ |
| 61 | ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR)) |
| 62 | #endif /* defined(SCSI_DISK8_MAJOR) */ |
| 63 | #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR) |
| 64 | #else |
| 65 | #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR) |
| 66 | #endif /* defined(SCSI_DISK0_MAJOR) */ |
| 67 | #endif /* defined(SCSI_BLK_MAJOR) */ |
| 68 | if (((MAJOR(s.st_rdev) == HD_MAJOR && |
| 69 | MINOR(s.st_rdev)%64 == 0) || |
| 70 | (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) && |
| 71 | MINOR(s.st_rdev)%16 == 0))) { |
| 72 | printf("%s is entire device, not just one partition!\n", device); |
| 73 | proceed_question(); |
| 74 | } |
| 75 | #endif |
| 76 | } |
| 77 | |
| 78 | void check_mount(const char *device, int force, const char *type) |
| 79 | { |
| 80 | errcode_t retval; |
| 81 | int mount_flags; |
| 82 | |
| 83 | retval = ext2fs_check_if_mounted(device, &mount_flags); |
| 84 | if (retval) { |
| 85 | bb_error_msg("cannot determine if %s is mounted", device); |
| 86 | return; |
| 87 | } |
| 88 | if (mount_flags & EXT2_MF_MOUNTED) { |
| 89 | bb_error_msg("%s is mounted !", device); |
| 90 | force_check: |
| 91 | if (force) |
| 92 | bb_error_msg("badblocks forced anyways"); |
| 93 | else |
| 94 | bb_error_msg_and_die("it's not safe to run badblocks!"); |
| 95 | } |
| 96 | |
| 97 | if (mount_flags & EXT2_MF_BUSY) { |
| 98 | bb_error_msg("%s is apparently in use by the system", device); |
| 99 | goto force_check; |
| 100 | } |
| 101 | |
| 102 | } |
| 103 | |
| 104 | void parse_journal_opts(char **journal_device, int *journal_flags, |
| 105 | int *journal_size, const char *opts) |
| 106 | { |
| 107 | char *buf, *token, *next, *p, *arg; |
| 108 | int journal_usage = 0; |
| 109 | buf = xstrdup(opts); |
| 110 | for (token = buf; token && *token; token = next) { |
| 111 | p = strchr(token, ','); |
| 112 | next = 0; |
| 113 | if (p) { |
| 114 | *p = 0; |
| 115 | next = p+1; |
| 116 | } |
| 117 | arg = strchr(token, '='); |
| 118 | if (arg) { |
| 119 | *arg = 0; |
| 120 | arg++; |
| 121 | } |
| 122 | if (strcmp(token, "device") == 0) { |
| 123 | *journal_device = blkid_get_devname(NULL, arg, NULL); |
| 124 | if (!journal_device) { |
| 125 | journal_usage++; |
| 126 | continue; |
| 127 | } |
| 128 | } else if (strcmp(token, "size") == 0) { |
| 129 | if (!arg) { |
| 130 | journal_usage++; |
| 131 | continue; |
| 132 | } |
| 133 | (*journal_size) = strtoul(arg, &p, 0); |
| 134 | if (*p) |
| 135 | journal_usage++; |
| 136 | } else if (strcmp(token, "v1_superblock") == 0) { |
| 137 | (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER; |
| 138 | continue; |
| 139 | } else |
| 140 | journal_usage++; |
| 141 | } |
| 142 | if (journal_usage) |
| 143 | bb_error_msg_and_die( |
| 144 | "\nBad journal options specified.\n\n" |
| 145 | "Journal options are separated by commas, " |
| 146 | "and may take an argument which\n" |
| 147 | "\tis set off by an equals ('=') sign.\n\n" |
| 148 | "Valid journal options are:\n" |
| 149 | "\tsize=<journal size in megabytes>\n" |
| 150 | "\tdevice=<journal device>\n\n" |
| 151 | "The journal size must be between " |
| 152 | "1024 and 102400 filesystem blocks.\n\n"); |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Determine the number of journal blocks to use, either via |
| 157 | * user-specified # of megabytes, or via some intelligently selected |
| 158 | * defaults. |
| 159 | * |
| 160 | * Find a reasonable journal file size (in blocks) given the number of blocks |
| 161 | * in the filesystem. For very small filesystems, it is not reasonable to |
| 162 | * have a journal that fills more than half of the filesystem. |
| 163 | */ |
| 164 | int figure_journal_size(int size, ext2_filsys fs) |
| 165 | { |
| 166 | blk_t j_blocks; |
| 167 | |
| 168 | if (fs->super->s_blocks_count < 2048) { |
| 169 | bb_error_msg("Filesystem too small for a journal"); |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | if (size >= 0) { |
| 174 | j_blocks = size * 1024 / (fs->blocksize / 1024); |
| 175 | if (j_blocks < 1024 || j_blocks > 102400) |
| 176 | bb_error_msg_and_die("\nThe requested journal " |
| 177 | "size is %d blocks;\n it must be " |
| 178 | "between 1024 and 102400 blocks; Aborting", |
| 179 | j_blocks); |
| 180 | if (j_blocks > fs->super->s_free_blocks_count) |
| 181 | bb_error_msg_and_die("Journal size too big for filesystem"); |
| 182 | return j_blocks; |
| 183 | } |
| 184 | |
| 185 | if (fs->super->s_blocks_count < 32768) |
| 186 | j_blocks = 1024; |
| 187 | else if (fs->super->s_blocks_count < 256*1024) |
| 188 | j_blocks = 4096; |
| 189 | else if (fs->super->s_blocks_count < 512*1024) |
| 190 | j_blocks = 8192; |
| 191 | else if (fs->super->s_blocks_count < 1024*1024) |
| 192 | j_blocks = 16384; |
| 193 | else |
| 194 | j_blocks = 32768; |
| 195 | |
| 196 | return j_blocks; |
| 197 | } |
| 198 | |
| 199 | void print_check_message(ext2_filsys fs) |
| 200 | { |
| 201 | printf("This filesystem will be automatically " |
| 202 | "checked every %d mounts or\n" |
| 203 | "%g days, whichever comes first. " |
| 204 | "Use tune2fs -c or -i to override.\n", |
| 205 | fs->super->s_max_mnt_count, |
| 206 | (double)fs->super->s_checkinterval / (3600 * 24)); |
| 207 | } |
| 208 | |
| 209 | void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force) |
| 210 | { |
| 211 | errcode_t retval; |
| 212 | ext2_filsys jfs; |
| 213 | io_manager io_ptr; |
| 214 | |
| 215 | check_plausibility(journal_device, force); |
| 216 | check_mount(journal_device, force, "journal"); |
| 217 | io_ptr = unix_io_manager; |
| 218 | retval = ext2fs_open(journal_device, EXT2_FLAG_RW| |
| 219 | EXT2_FLAG_JOURNAL_DEV_OK, 0, |
| 220 | fs->blocksize, io_ptr, &jfs); |
| 221 | if (retval) |
| 222 | bb_error_msg_and_die("cannot journal device %s", journal_device); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 223 | if (!quiet) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 224 | printf("Adding journal to device %s: ", journal_device); |
| 225 | fflush(stdout); |
| 226 | retval = ext2fs_add_journal_device(fs, jfs); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 227 | if (retval) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 228 | bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 229 | if (!quiet) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 230 | puts("done"); |
| 231 | ext2fs_close(jfs); |
| 232 | } |
| 233 | |
| 234 | void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet) |
| 235 | { |
| 236 | unsigned long journal_blocks; |
| 237 | errcode_t retval; |
| 238 | |
| 239 | journal_blocks = figure_journal_size(journal_size, fs); |
| 240 | if (!journal_blocks) { |
| 241 | fs->super->s_feature_compat &= |
| 242 | ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
| 243 | return; |
| 244 | } |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 245 | if (!quiet) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 246 | printf("Creating journal (%ld blocks): ", journal_blocks); |
| 247 | fflush(stdout); |
| 248 | retval = ext2fs_add_journal_inode(fs, journal_blocks, |
| 249 | journal_flags); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 250 | if (retval) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 251 | bb_error_msg_and_die("cannot create journal"); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 252 | if (!quiet) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 253 | puts("done"); |
| 254 | } |
| 255 | |
| 256 | char *e2fs_set_sbin_path(void) |
| 257 | { |
| 258 | char *oldpath = getenv("PATH"); |
| 259 | /* Update our PATH to include /sbin */ |
| 260 | #define PATH_SET "/sbin" |
| 261 | if (oldpath) |
| 262 | oldpath = xasprintf("%s:%s", PATH_SET, oldpath); |
| 263 | else |
| 264 | oldpath = PATH_SET; |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 265 | putenv(oldpath); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 266 | return oldpath; |
| 267 | } |