Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * mke2fs.c - Make a ext2fs filesystem. |
| 4 | * |
| 5 | * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
| 6 | * 2003, 2004, 2005 by Theodore Ts'o. |
| 7 | * |
| 8 | * This file may be redistributed under the terms of the GNU Public |
| 9 | * License. |
| 10 | */ |
| 11 | |
| 12 | /* Usage: mke2fs [options] device |
| 13 | * |
| 14 | * The device may be a block device or a image of one, but this isn't |
| 15 | * enforced (but it's not much fun on a character device :-). |
| 16 | */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <string.h> |
| 20 | #include <fcntl.h> |
| 21 | #include <ctype.h> |
| 22 | #include <time.h> |
| 23 | #include <getopt.h> |
| 24 | #include <unistd.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <errno.h> |
| 27 | #include <mntent.h> |
| 28 | #include <sys/ioctl.h> |
| 29 | #include <sys/types.h> |
| 30 | |
| 31 | #include "e2fsbb.h" |
| 32 | #include "ext2fs/ext2_fs.h" |
| 33 | #include "uuid/uuid.h" |
| 34 | #include "e2p/e2p.h" |
| 35 | #include "ext2fs/ext2fs.h" |
| 36 | #include "util.h" |
| 37 | |
| 38 | #define STRIDE_LENGTH 8 |
| 39 | |
| 40 | #ifndef __sparc__ |
| 41 | #define ZAP_BOOTBLOCK |
| 42 | #endif |
| 43 | |
| 44 | static const char * device_name; |
| 45 | |
| 46 | /* Command line options */ |
| 47 | static int cflag; |
| 48 | static int quiet; |
| 49 | static int super_only; |
| 50 | static int force; |
| 51 | static int noaction; |
| 52 | static int journal_size; |
| 53 | static int journal_flags; |
| 54 | static const char *bad_blocks_filename; |
| 55 | static __u32 fs_stride; |
| 56 | |
| 57 | static struct ext2_super_block param; |
| 58 | static char *creator_os; |
| 59 | static char *volume_label; |
| 60 | static char *mount_dir; |
| 61 | static char *journal_device = NULL; |
Denis Vlasenko | b71c668 | 2007-07-21 15:08:09 +0000 | [diff] [blame] | 62 | static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */ |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 63 | |
| 64 | static int sys_page_size = 4096; |
| 65 | static int linux_version_code = 0; |
| 66 | |
| 67 | static int int_log2(int arg) |
| 68 | { |
Denis Vlasenko | b71c668 | 2007-07-21 15:08:09 +0000 | [diff] [blame] | 69 | int l = 0; |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 70 | |
| 71 | arg >>= 1; |
| 72 | while (arg) { |
| 73 | l++; |
| 74 | arg >>= 1; |
| 75 | } |
| 76 | return l; |
| 77 | } |
| 78 | |
| 79 | static int int_log10(unsigned int arg) |
| 80 | { |
| 81 | int l; |
| 82 | |
Denis Vlasenko | b71c668 | 2007-07-21 15:08:09 +0000 | [diff] [blame] | 83 | for (l = 0; arg; l++) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 84 | arg = arg / 10; |
| 85 | return l; |
| 86 | } |
| 87 | |
| 88 | /* |
| 89 | * This function sets the default parameters for a filesystem |
| 90 | * |
| 91 | * The type is specified by the user. The size is the maximum size |
| 92 | * (in megabytes) for which a set of parameters applies, with a size |
| 93 | * of zero meaning that it is the default parameter for the type. |
| 94 | * Note that order is important in the table below. |
| 95 | */ |
| 96 | #define DEF_MAX_BLOCKSIZE -1 |
| 97 | static const char default_str[] = "default"; |
| 98 | struct mke2fs_defaults { |
| 99 | const char *type; |
| 100 | int size; |
| 101 | int blocksize; |
| 102 | int inode_ratio; |
| 103 | }; |
| 104 | |
| 105 | static const struct mke2fs_defaults settings[] = { |
| 106 | { default_str, 0, 4096, 8192 }, |
| 107 | { default_str, 512, 1024, 4096 }, |
| 108 | { default_str, 3, 1024, 8192 }, |
| 109 | { "journal", 0, 4096, 8192 }, |
| 110 | { "news", 0, 4096, 4096 }, |
| 111 | { "largefile", 0, 4096, 1024 * 1024 }, |
| 112 | { "largefile4", 0, 4096, 4096 * 1024 }, |
| 113 | { 0, 0, 0, 0}, |
| 114 | }; |
| 115 | |
| 116 | static void set_fs_defaults(const char *fs_type, |
| 117 | struct ext2_super_block *super, |
| 118 | int blocksize, int sector_size, |
| 119 | int *inode_ratio) |
| 120 | { |
| 121 | int megs; |
| 122 | int ratio = 0; |
| 123 | const struct mke2fs_defaults *p; |
| 124 | int use_bsize = 1024; |
| 125 | |
| 126 | megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024; |
| 127 | if (inode_ratio) |
| 128 | ratio = *inode_ratio; |
| 129 | if (!fs_type) |
| 130 | fs_type = default_str; |
| 131 | for (p = settings; p->type; p++) { |
| 132 | if ((strcmp(p->type, fs_type) != 0) && |
| 133 | (strcmp(p->type, default_str) != 0)) |
| 134 | continue; |
| 135 | if ((p->size != 0) && (megs > p->size)) |
| 136 | continue; |
| 137 | if (ratio == 0) |
| 138 | *inode_ratio = p->inode_ratio < blocksize ? |
| 139 | blocksize : p->inode_ratio; |
| 140 | use_bsize = p->blocksize; |
| 141 | } |
| 142 | if (blocksize <= 0) { |
| 143 | if (use_bsize == DEF_MAX_BLOCKSIZE) { |
| 144 | use_bsize = sys_page_size; |
| 145 | if ((linux_version_code < (2*65536 + 6*256)) && |
| 146 | (use_bsize > 4096)) |
| 147 | use_bsize = 4096; |
| 148 | } |
| 149 | if (sector_size && use_bsize < sector_size) |
| 150 | use_bsize = sector_size; |
| 151 | if ((blocksize < 0) && (use_bsize < (-blocksize))) |
| 152 | use_bsize = -blocksize; |
| 153 | blocksize = use_bsize; |
| 154 | super->s_blocks_count /= blocksize / 1024; |
| 155 | } |
| 156 | super->s_log_frag_size = super->s_log_block_size = |
| 157 | int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | /* |
| 162 | * Helper function for read_bb_file and test_disk |
| 163 | */ |
| 164 | static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk) |
| 165 | { |
| 166 | bb_error_msg("Bad block %u out of range; ignored", blk); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | /* |
| 170 | * Busybox stuff |
| 171 | */ |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 172 | static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 173 | static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) |
| 174 | { |
| 175 | va_list ap; |
| 176 | |
| 177 | if (retval) { |
| 178 | va_start(ap, fmt); |
Denis Vlasenko | f5d8c90 | 2008-06-26 14:32:57 +0000 | [diff] [blame] | 179 | fprintf(stderr, "\nCould not "); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 180 | vfprintf(stderr, fmt, ap); |
| 181 | fprintf(stderr, "\n"); |
| 182 | va_end(ap); |
| 183 | exit(EXIT_FAILURE); |
| 184 | } |
| 185 | } |
| 186 | |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 187 | static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 188 | static void mke2fs_verbose(const char *fmt, ...) |
| 189 | { |
| 190 | va_list ap; |
| 191 | |
| 192 | if (!quiet) { |
| 193 | va_start(ap, fmt); |
| 194 | vfprintf(stdout, fmt, ap); |
| 195 | fflush(stdout); |
| 196 | va_end(ap); |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | static void mke2fs_verbose_done(void) |
| 201 | { |
| 202 | mke2fs_verbose("done\n"); |
| 203 | } |
| 204 | |
Denis Vlasenko | fb79a2e | 2007-07-14 22:07:14 +0000 | [diff] [blame] | 205 | static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3))); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 206 | static void mke2fs_warning_msg(int retval, char *fmt, ... ) |
| 207 | { |
| 208 | va_list ap; |
| 209 | |
| 210 | if (retval) { |
| 211 | va_start(ap, fmt); |
Denis Vlasenko | f5d8c90 | 2008-06-26 14:32:57 +0000 | [diff] [blame] | 212 | fprintf(stderr, "\nWarning: "); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 213 | vfprintf(stderr, fmt, ap); |
| 214 | fprintf(stderr, "\n"); |
| 215 | va_end(ap); |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * Reads the bad blocks list from a file |
| 221 | */ |
| 222 | static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list, |
| 223 | const char *bad_blocks_file) |
| 224 | { |
| 225 | FILE *f; |
| 226 | errcode_t retval; |
| 227 | |
Denis Vlasenko | 5415c85 | 2008-07-21 23:05:26 +0000 | [diff] [blame] | 228 | f = xfopen_for_read(bad_blocks_file); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 229 | retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); |
| 230 | fclose (f); |
| 231 | mke2fs_error_msg_and_die(retval, "read bad blocks from list"); |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Runs the badblocks program to test the disk |
| 236 | */ |
| 237 | static void test_disk(ext2_filsys fs, badblocks_list *bb_list) |
| 238 | { |
| 239 | FILE *f; |
| 240 | errcode_t retval; |
| 241 | char buf[1024]; |
| 242 | |
| 243 | sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize, |
| 244 | quiet ? "" : "-s ", (cflag > 1) ? "-w " : "", |
| 245 | fs->device_name, fs->super->s_blocks_count); |
| 246 | mke2fs_verbose("Running command: %s\n", buf); |
| 247 | f = popen(buf, "r"); |
| 248 | if (!f) { |
| 249 | bb_perror_msg_and_die("cannot run '%s'", buf); |
| 250 | } |
| 251 | retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); |
| 252 | pclose(f); |
| 253 | mke2fs_error_msg_and_die(retval, "read bad blocks from program"); |
| 254 | } |
| 255 | |
| 256 | static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list) |
| 257 | { |
| 258 | dgrp_t i; |
| 259 | blk_t j; |
| 260 | unsigned must_be_good; |
| 261 | blk_t blk; |
| 262 | badblocks_iterate bb_iter; |
| 263 | errcode_t retval; |
| 264 | blk_t group_block; |
| 265 | int group; |
| 266 | int group_bad; |
| 267 | |
| 268 | if (!bb_list) |
| 269 | return; |
| 270 | |
| 271 | /* |
| 272 | * The primary superblock and group descriptors *must* be |
| 273 | * good; if not, abort. |
| 274 | */ |
| 275 | must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks; |
| 276 | for (i = fs->super->s_first_data_block; i <= must_be_good; i++) { |
| 277 | if (ext2fs_badblocks_list_test(bb_list, i)) { |
| 278 | bb_error_msg_and_die( |
| 279 | "Block %d in primary superblock/group descriptor area bad\n" |
| 280 | "Blocks %d through %d must be good in order to build a filesystem\n" |
| 281 | "Aborting ...", i, fs->super->s_first_data_block, must_be_good); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * See if any of the bad blocks are showing up in the backup |
| 287 | * superblocks and/or group descriptors. If so, issue a |
| 288 | * warning and adjust the block counts appropriately. |
| 289 | */ |
| 290 | group_block = fs->super->s_first_data_block + |
| 291 | fs->super->s_blocks_per_group; |
| 292 | |
| 293 | for (i = 1; i < fs->group_desc_count; i++) { |
| 294 | group_bad = 0; |
| 295 | for (j=0; j < fs->desc_blocks+1; j++) { |
| 296 | if (ext2fs_badblocks_list_test(bb_list, |
| 297 | group_block + j)) { |
| 298 | mke2fs_warning_msg(!group_bad, |
| 299 | "the backup superblock/group descriptors at block %d contain\n" |
| 300 | "bad blocks\n", group_block); |
| 301 | group_bad++; |
| 302 | group = ext2fs_group_of_blk(fs, group_block+j); |
| 303 | fs->group_desc[group].bg_free_blocks_count++; |
| 304 | fs->super->s_free_blocks_count++; |
| 305 | } |
| 306 | } |
| 307 | group_block += fs->super->s_blocks_per_group; |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * Mark all the bad blocks as used... |
| 312 | */ |
| 313 | retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter); |
| 314 | mke2fs_error_msg_and_die(retval, "mark bad blocks as used"); |
| 315 | |
| 316 | while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) |
| 317 | ext2fs_mark_block_bitmap(fs->block_map, blk); |
| 318 | ext2fs_badblocks_list_iterate_end(bb_iter); |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * These functions implement a generalized progress meter. |
| 323 | */ |
| 324 | struct progress_struct { |
| 325 | char format[20]; |
| 326 | char backup[80]; |
| 327 | __u32 max; |
| 328 | int skip_progress; |
| 329 | }; |
| 330 | |
| 331 | static void progress_init(struct progress_struct *progress, |
| 332 | const char *label,__u32 max) |
| 333 | { |
| 334 | int i; |
| 335 | |
| 336 | memset(progress, 0, sizeof(struct progress_struct)); |
| 337 | if (quiet) |
| 338 | return; |
| 339 | |
| 340 | /* |
| 341 | * Figure out how many digits we need |
| 342 | */ |
| 343 | i = int_log10(max); |
| 344 | sprintf(progress->format, "%%%dd/%%%dld", i, i); |
| 345 | memset(progress->backup, '\b', sizeof(progress->backup)-1); |
| 346 | progress->backup[sizeof(progress->backup)-1] = 0; |
| 347 | if ((2*i)+1 < (int) sizeof(progress->backup)) |
| 348 | progress->backup[(2*i)+1] = 0; |
| 349 | progress->max = max; |
| 350 | |
| 351 | progress->skip_progress = 0; |
| 352 | if (getenv("MKE2FS_SKIP_PROGRESS")) |
| 353 | progress->skip_progress++; |
| 354 | |
| 355 | fputs(label, stdout); |
| 356 | fflush(stdout); |
| 357 | } |
| 358 | |
| 359 | static void progress_update(struct progress_struct *progress, __u32 val) |
| 360 | { |
| 361 | if ((progress->format[0] == 0) || progress->skip_progress) |
| 362 | return; |
| 363 | printf(progress->format, val, progress->max); |
| 364 | fputs(progress->backup, stdout); |
| 365 | } |
| 366 | |
| 367 | static void progress_close(struct progress_struct *progress) |
| 368 | { |
| 369 | if (progress->format[0] == 0) |
| 370 | return; |
| 371 | printf("%-28s\n", "done"); |
| 372 | } |
| 373 | |
| 374 | |
| 375 | /* |
| 376 | * Helper function which zeros out _num_ blocks starting at _blk_. In |
| 377 | * case of an error, the details of the error is returned via _ret_blk_ |
| 378 | * and _ret_count_ if they are non-NULL pointers. Returns 0 on |
| 379 | * success, and an error code on an error. |
| 380 | * |
| 381 | * As a special case, if the first argument is NULL, then it will |
| 382 | * attempt to free the static zeroizing buffer. (This is to keep |
| 383 | * programs that check for memory leaks happy.) |
| 384 | */ |
| 385 | static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num, |
| 386 | struct progress_struct *progress, |
| 387 | blk_t *ret_blk, int *ret_count) |
| 388 | { |
| 389 | int j, count, next_update, next_update_incr; |
| 390 | static char *buf; |
| 391 | errcode_t retval; |
| 392 | |
| 393 | /* If fs is null, clean up the static buffer and return */ |
| 394 | if (!fs) { |
| 395 | if (buf) { |
| 396 | free(buf); |
| 397 | buf = 0; |
| 398 | } |
| 399 | return 0; |
| 400 | } |
| 401 | /* Allocate the zeroizing buffer if necessary */ |
| 402 | if (!buf) { |
| 403 | buf = xzalloc(fs->blocksize * STRIDE_LENGTH); |
| 404 | } |
| 405 | /* OK, do the write loop */ |
| 406 | next_update = 0; |
| 407 | next_update_incr = num / 100; |
| 408 | if (next_update_incr < 1) |
| 409 | next_update_incr = 1; |
| 410 | for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) { |
| 411 | count = num - j; |
| 412 | if (count > STRIDE_LENGTH) |
| 413 | count = STRIDE_LENGTH; |
| 414 | retval = io_channel_write_blk(fs->io, blk, count, buf); |
| 415 | if (retval) { |
| 416 | if (ret_count) |
| 417 | *ret_count = count; |
| 418 | if (ret_blk) |
| 419 | *ret_blk = blk; |
| 420 | return retval; |
| 421 | } |
| 422 | if (progress && j > next_update) { |
| 423 | next_update += num / 100; |
| 424 | progress_update(progress, blk); |
| 425 | } |
| 426 | } |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | static void write_inode_tables(ext2_filsys fs) |
| 431 | { |
| 432 | errcode_t retval; |
| 433 | blk_t blk; |
| 434 | dgrp_t i; |
| 435 | int num; |
| 436 | struct progress_struct progress; |
| 437 | |
| 438 | if (quiet) |
| 439 | memset(&progress, 0, sizeof(progress)); |
| 440 | else |
| 441 | progress_init(&progress, "Writing inode tables: ", |
| 442 | fs->group_desc_count); |
| 443 | |
| 444 | for (i = 0; i < fs->group_desc_count; i++) { |
| 445 | progress_update(&progress, i); |
| 446 | |
| 447 | blk = fs->group_desc[i].bg_inode_table; |
| 448 | num = fs->inode_blocks_per_group; |
| 449 | |
| 450 | retval = zero_blocks(fs, blk, num, 0, &blk, &num); |
| 451 | mke2fs_error_msg_and_die(retval, |
| 452 | "write %d blocks in inode table starting at %d.", |
| 453 | num, blk); |
| 454 | if (sync_kludge) { |
| 455 | if (sync_kludge == 1) |
| 456 | sync(); |
| 457 | else if ((i % sync_kludge) == 0) |
| 458 | sync(); |
| 459 | } |
| 460 | } |
| 461 | zero_blocks(0, 0, 0, 0, 0, 0); |
| 462 | progress_close(&progress); |
| 463 | } |
| 464 | |
| 465 | static void create_root_dir(ext2_filsys fs) |
| 466 | { |
| 467 | errcode_t retval; |
| 468 | struct ext2_inode inode; |
| 469 | |
| 470 | retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0); |
| 471 | mke2fs_error_msg_and_die(retval, "create root dir"); |
| 472 | if (geteuid()) { |
| 473 | retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode); |
| 474 | mke2fs_error_msg_and_die(retval, "read root inode"); |
| 475 | inode.i_uid = getuid(); |
| 476 | if (inode.i_uid) |
| 477 | inode.i_gid = getgid(); |
| 478 | retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); |
| 479 | mke2fs_error_msg_and_die(retval, "set root inode ownership"); |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | static void create_lost_and_found(ext2_filsys fs) |
| 484 | { |
| 485 | errcode_t retval; |
| 486 | ext2_ino_t ino; |
| 487 | const char *name = "lost+found"; |
| 488 | int i = 1; |
| 489 | char *msg = "create"; |
| 490 | int lpf_size = 0; |
| 491 | |
| 492 | fs->umask = 077; |
| 493 | retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name); |
| 494 | if (retval) { |
| 495 | goto CREATE_LOST_AND_FOUND_ERROR; |
| 496 | } |
| 497 | |
| 498 | retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino); |
| 499 | if (retval) { |
| 500 | msg = "lookup"; |
| 501 | goto CREATE_LOST_AND_FOUND_ERROR; |
| 502 | } |
| 503 | |
| 504 | for (; i < EXT2_NDIR_BLOCKS; i++) { |
| 505 | if ((lpf_size += fs->blocksize) >= 16*1024) |
| 506 | break; |
| 507 | retval = ext2fs_expand_dir(fs, ino); |
| 508 | msg = "expand"; |
| 509 | CREATE_LOST_AND_FOUND_ERROR: |
| 510 | mke2fs_error_msg_and_die(retval, "%s %s", msg, name); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list) |
| 515 | { |
| 516 | errcode_t retval; |
| 517 | |
| 518 | ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO); |
| 519 | fs->group_desc[0].bg_free_inodes_count--; |
| 520 | fs->super->s_free_inodes_count--; |
| 521 | retval = ext2fs_update_bb_inode(fs, bb_list); |
| 522 | mke2fs_error_msg_and_die(retval, "set bad block inode"); |
| 523 | } |
| 524 | |
| 525 | static void reserve_inodes(ext2_filsys fs) |
| 526 | { |
| 527 | ext2_ino_t i; |
| 528 | int group; |
| 529 | |
| 530 | for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) { |
| 531 | ext2fs_mark_inode_bitmap(fs->inode_map, i); |
| 532 | group = ext2fs_group_of_ino(fs, i); |
| 533 | fs->group_desc[group].bg_free_inodes_count--; |
| 534 | fs->super->s_free_inodes_count--; |
| 535 | } |
| 536 | ext2fs_mark_ib_dirty(fs); |
| 537 | } |
| 538 | |
| 539 | #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ |
| 540 | #define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */ |
| 541 | #define BSD_LABEL_OFFSET 64 |
| 542 | |
| 543 | static void zap_sector(ext2_filsys fs, int sect, int nsect) |
| 544 | { |
| 545 | char *buf; |
| 546 | char *fmt = "could not %s %d"; |
| 547 | int retval; |
| 548 | unsigned int *magic; |
| 549 | |
| 550 | buf = xmalloc(512*nsect); |
| 551 | |
| 552 | if (sect == 0) { |
| 553 | /* Check for a BSD disklabel, and don't erase it if so */ |
| 554 | retval = io_channel_read_blk(fs->io, 0, -512, buf); |
| 555 | if (retval) |
| 556 | mke2fs_warning_msg(retval, fmt, "read block", 0); |
| 557 | else { |
| 558 | magic = (unsigned int *) (buf + BSD_LABEL_OFFSET); |
| 559 | if ((*magic == BSD_DISKMAGIC) || |
| 560 | (*magic == BSD_MAGICDISK)) |
| 561 | return; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | memset(buf, 0, 512*nsect); |
| 566 | io_channel_set_blksize(fs->io, 512); |
| 567 | retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf); |
| 568 | io_channel_set_blksize(fs->io, fs->blocksize); |
| 569 | free(buf); |
| 570 | mke2fs_warning_msg(retval, fmt, "erase sector", sect); |
| 571 | } |
| 572 | |
| 573 | static void create_journal_dev(ext2_filsys fs) |
| 574 | { |
| 575 | struct progress_struct progress; |
| 576 | errcode_t retval; |
| 577 | char *buf; |
| 578 | char *fmt = "%s journal superblock"; |
| 579 | blk_t blk; |
| 580 | int count; |
| 581 | |
| 582 | retval = ext2fs_create_journal_superblock(fs, |
| 583 | fs->super->s_blocks_count, 0, &buf); |
| 584 | mke2fs_error_msg_and_die(retval, fmt, "init"); |
| 585 | if (quiet) |
| 586 | memset(&progress, 0, sizeof(progress)); |
| 587 | else |
| 588 | progress_init(&progress, "Zeroing journal device: ", |
| 589 | fs->super->s_blocks_count); |
| 590 | |
| 591 | retval = zero_blocks(fs, 0, fs->super->s_blocks_count, |
| 592 | &progress, &blk, &count); |
| 593 | mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)", |
| 594 | blk, count); |
| 595 | zero_blocks(0, 0, 0, 0, 0, 0); |
| 596 | |
| 597 | retval = io_channel_write_blk(fs->io, |
| 598 | fs->super->s_first_data_block+1, |
| 599 | 1, buf); |
| 600 | mke2fs_error_msg_and_die(retval, fmt, "write"); |
| 601 | progress_close(&progress); |
| 602 | } |
| 603 | |
| 604 | static void show_stats(ext2_filsys fs) |
| 605 | { |
| 606 | struct ext2_super_block *s = fs->super; |
| 607 | char *os; |
| 608 | blk_t group_block; |
| 609 | dgrp_t i; |
| 610 | int need, col_left; |
| 611 | |
| 612 | mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count), |
| 613 | "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count); |
| 614 | os = e2p_os2string(fs->super->s_creator_os); |
| 615 | printf( "Filesystem label=%.*s\n" |
| 616 | "OS type: %s\n" |
| 617 | "Block size=%u (log=%u)\n" |
| 618 | "Fragment size=%u (log=%u)\n" |
| 619 | "%u inodes, %u blocks\n" |
| 620 | "%u blocks (%2.2f%%) reserved for the super user\n" |
| 621 | "First data block=%u\n", |
| 622 | (int) sizeof(s->s_volume_name), |
| 623 | s->s_volume_name, |
| 624 | os, |
| 625 | fs->blocksize, s->s_log_block_size, |
| 626 | fs->fragsize, s->s_log_frag_size, |
| 627 | s->s_inodes_count, s->s_blocks_count, |
| 628 | s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count, |
| 629 | s->s_first_data_block); |
| 630 | free(os); |
| 631 | if (s->s_reserved_gdt_blocks) { |
| 632 | printf("Maximum filesystem blocks=%lu\n", |
| 633 | (s->s_reserved_gdt_blocks + fs->desc_blocks) * |
| 634 | (fs->blocksize / sizeof(struct ext2_group_desc)) * |
| 635 | s->s_blocks_per_group); |
| 636 | } |
| 637 | printf( "%u block group%s\n" |
| 638 | "%u blocks per group, %u fragments per group\n" |
| 639 | "%u inodes per group\n", |
| 640 | fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "", |
| 641 | s->s_blocks_per_group, s->s_frags_per_group, |
| 642 | s->s_inodes_per_group); |
| 643 | if (fs->group_desc_count == 1) { |
Denis Vlasenko | 4daad90 | 2007-09-27 10:20:47 +0000 | [diff] [blame] | 644 | bb_putchar('\n'); |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 645 | return; |
| 646 | } |
| 647 | |
| 648 | printf("Superblock backups stored on blocks: "); |
| 649 | group_block = s->s_first_data_block; |
| 650 | col_left = 0; |
| 651 | for (i = 1; i < fs->group_desc_count; i++) { |
| 652 | group_block += s->s_blocks_per_group; |
| 653 | if (!ext2fs_bg_has_super(fs, i)) |
| 654 | continue; |
| 655 | if (i != 1) |
| 656 | printf(", "); |
| 657 | need = int_log10(group_block) + 2; |
| 658 | if (need > col_left) { |
| 659 | printf("\n\t"); |
| 660 | col_left = 72; |
| 661 | } |
| 662 | col_left -= need; |
| 663 | printf("%u", group_block); |
| 664 | } |
| 665 | puts("\n"); |
| 666 | } |
| 667 | |
| 668 | /* |
| 669 | * Set the S_CREATOR_OS field. Return true if OS is known, |
| 670 | * otherwise, 0. |
| 671 | */ |
| 672 | static int set_os(struct ext2_super_block *sb, char *os) |
| 673 | { |
| 674 | if (isdigit (*os)) { |
| 675 | sb->s_creator_os = atoi(os); |
| 676 | return 1; |
| 677 | } |
| 678 | |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 679 | if ((sb->s_creator_os = e2p_string2os(os)) >= 0) { |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 680 | return 1; |
| 681 | } else if (!strcasecmp("GNU", os)) { |
| 682 | sb->s_creator_os = EXT2_OS_HURD; |
| 683 | return 1; |
| 684 | } |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static void parse_extended_opts(struct ext2_super_block *sb_param, |
| 689 | const char *opts) |
| 690 | { |
| 691 | char *buf, *token, *next, *p, *arg; |
| 692 | int r_usage = 0; |
| 693 | |
| 694 | buf = xstrdup(opts); |
| 695 | for (token = buf; token && *token; token = next) { |
| 696 | p = strchr(token, ','); |
| 697 | next = 0; |
| 698 | if (p) { |
| 699 | *p = 0; |
| 700 | next = p+1; |
| 701 | } |
| 702 | arg = strchr(token, '='); |
| 703 | if (arg) { |
| 704 | *arg = 0; |
| 705 | arg++; |
| 706 | } |
| 707 | if (strcmp(token, "stride") == 0) { |
| 708 | if (!arg) { |
| 709 | r_usage++; |
| 710 | continue; |
| 711 | } |
| 712 | fs_stride = strtoul(arg, &p, 0); |
| 713 | if (*p || (fs_stride == 0)) { |
| 714 | bb_error_msg("Invalid stride parameter: %s", arg); |
| 715 | r_usage++; |
| 716 | continue; |
| 717 | } |
| 718 | } else if (!strcmp(token, "resize")) { |
| 719 | unsigned long resize, bpg, rsv_groups; |
| 720 | unsigned long group_desc_count, desc_blocks; |
| 721 | unsigned int gdpb, blocksize; |
| 722 | int rsv_gdb; |
| 723 | |
| 724 | if (!arg) { |
| 725 | r_usage++; |
| 726 | continue; |
| 727 | } |
| 728 | |
| 729 | resize = parse_num_blocks(arg, |
| 730 | sb_param->s_log_block_size); |
| 731 | |
| 732 | if (resize == 0) { |
| 733 | bb_error_msg("Invalid resize parameter: %s", arg); |
| 734 | r_usage++; |
| 735 | continue; |
| 736 | } |
| 737 | if (resize <= sb_param->s_blocks_count) { |
| 738 | bb_error_msg("The resize maximum must be greater " |
| 739 | "than the filesystem size"); |
| 740 | r_usage++; |
| 741 | continue; |
| 742 | } |
| 743 | |
| 744 | blocksize = EXT2_BLOCK_SIZE(sb_param); |
| 745 | bpg = sb_param->s_blocks_per_group; |
| 746 | if (!bpg) |
| 747 | bpg = blocksize * 8; |
| 748 | gdpb = blocksize / sizeof(struct ext2_group_desc); |
| 749 | group_desc_count = (sb_param->s_blocks_count + |
| 750 | bpg - 1) / bpg; |
| 751 | desc_blocks = (group_desc_count + |
| 752 | gdpb - 1) / gdpb; |
| 753 | rsv_groups = (resize + bpg - 1) / bpg; |
| 754 | rsv_gdb = (rsv_groups + gdpb - 1) / gdpb - |
| 755 | desc_blocks; |
| 756 | if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param)) |
| 757 | rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param); |
| 758 | |
| 759 | if (rsv_gdb > 0) { |
| 760 | sb_param->s_feature_compat |= |
| 761 | EXT2_FEATURE_COMPAT_RESIZE_INODE; |
| 762 | |
| 763 | sb_param->s_reserved_gdt_blocks = rsv_gdb; |
| 764 | } |
| 765 | } else |
| 766 | r_usage++; |
| 767 | } |
| 768 | if (r_usage) { |
| 769 | bb_error_msg_and_die( |
| 770 | "\nBad options specified.\n\n" |
| 771 | "Extended options are separated by commas, " |
| 772 | "and may take an argument which\n" |
| 773 | "\tis set off by an equals ('=') sign.\n\n" |
| 774 | "Valid extended options are:\n" |
| 775 | "\tstride=<stride length in blocks>\n" |
| 776 | "\tresize=<resize maximum size in blocks>\n"); |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | static __u32 ok_features[3] = { |
| 781 | EXT3_FEATURE_COMPAT_HAS_JOURNAL | |
| 782 | EXT2_FEATURE_COMPAT_RESIZE_INODE | |
| 783 | EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */ |
| 784 | EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */ |
| 785 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV| |
| 786 | EXT2_FEATURE_INCOMPAT_META_BG, |
| 787 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */ |
| 788 | }; |
| 789 | |
Bernhard Reutner-Fischer | febe3c4 | 2007-04-04 20:52:03 +0000 | [diff] [blame] | 790 | static int PRS(int argc, char **argv) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 791 | { |
| 792 | int c; |
| 793 | int size; |
| 794 | char * tmp; |
| 795 | int blocksize = 0; |
| 796 | int inode_ratio = 0; |
| 797 | int inode_size = 0; |
| 798 | int reserved_ratio = 5; |
| 799 | int sector_size = 0; |
| 800 | int show_version_only = 0; |
| 801 | ext2_ino_t num_inodes = 0; |
| 802 | errcode_t retval; |
| 803 | char * extended_opts = 0; |
| 804 | const char * fs_type = 0; |
| 805 | blk_t dev_size; |
| 806 | long sysval; |
| 807 | |
| 808 | /* Update our PATH to include /sbin */ |
| 809 | e2fs_set_sbin_path(); |
| 810 | |
| 811 | tmp = getenv("MKE2FS_SYNC"); |
| 812 | if (tmp) |
| 813 | sync_kludge = atoi(tmp); |
| 814 | |
| 815 | /* Determine the system page size if possible */ |
| 816 | #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE)) |
| 817 | #define _SC_PAGESIZE _SC_PAGE_SIZE |
| 818 | #endif |
| 819 | #ifdef _SC_PAGESIZE |
| 820 | sysval = sysconf(_SC_PAGESIZE); |
| 821 | if (sysval > 0) |
| 822 | sys_page_size = sysval; |
| 823 | #endif /* _SC_PAGESIZE */ |
| 824 | |
| 825 | setbuf(stdout, NULL); |
| 826 | setbuf(stderr, NULL); |
| 827 | memset(¶m, 0, sizeof(struct ext2_super_block)); |
| 828 | param.s_rev_level = 1; /* Create revision 1 filesystems now */ |
| 829 | param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE; |
| 830 | param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
| 831 | |
| 832 | #ifdef __linux__ |
| 833 | linux_version_code = get_linux_version_code(); |
| 834 | if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) { |
| 835 | param.s_rev_level = 0; |
| 836 | param.s_feature_incompat = 0; |
| 837 | param.s_feature_compat = 0; |
| 838 | param.s_feature_ro_compat = 0; |
| 839 | } |
| 840 | #endif |
| 841 | |
| 842 | /* If called as mkfs.ext3, create a journal inode */ |
| 843 | if (last_char_is(applet_name, '3')) |
| 844 | journal_size = -1; |
| 845 | |
| 846 | while ((c = getopt (argc, argv, |
| 847 | "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) { |
| 848 | switch (c) { |
| 849 | case 'b': |
| 850 | blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); |
| 851 | mke2fs_warning_msg((blocksize > 4096), |
| 852 | "blocksize %d not usable on most systems", |
| 853 | blocksize); |
| 854 | param.s_log_block_size = |
| 855 | int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); |
| 856 | break; |
| 857 | case 'c': /* Check for bad blocks */ |
| 858 | case 't': /* deprecated */ |
| 859 | cflag++; |
| 860 | break; |
| 861 | case 'f': |
| 862 | size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); |
| 863 | param.s_log_frag_size = |
| 864 | int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE); |
| 865 | mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option"); |
| 866 | break; |
| 867 | case 'g': |
| 868 | param.s_blocks_per_group = xatou32(optarg); |
| 869 | if ((param.s_blocks_per_group % 8) != 0) { |
| 870 | bb_error_msg_and_die("blocks per group must be multiple of 8"); |
| 871 | } |
| 872 | break; |
| 873 | case 'i': |
| 874 | /* Huh? is "* 1024" correct? */ |
| 875 | inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024); |
| 876 | break; |
| 877 | case 'J': |
| 878 | parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); |
| 879 | break; |
| 880 | case 'j': |
| 881 | param.s_feature_compat |= |
| 882 | EXT3_FEATURE_COMPAT_HAS_JOURNAL; |
| 883 | if (!journal_size) |
| 884 | journal_size = -1; |
| 885 | break; |
| 886 | case 'l': |
| 887 | bad_blocks_filename = optarg; |
| 888 | break; |
| 889 | case 'm': |
| 890 | reserved_ratio = xatou_range(optarg, 0, 50); |
| 891 | break; |
| 892 | case 'n': |
| 893 | noaction++; |
| 894 | break; |
| 895 | case 'o': |
| 896 | creator_os = optarg; |
| 897 | break; |
| 898 | case 'r': |
| 899 | param.s_rev_level = xatoi_u(optarg); |
| 900 | if (param.s_rev_level == EXT2_GOOD_OLD_REV) { |
| 901 | param.s_feature_incompat = 0; |
| 902 | param.s_feature_compat = 0; |
| 903 | param.s_feature_ro_compat = 0; |
| 904 | } |
| 905 | break; |
| 906 | case 's': /* deprecated */ |
| 907 | if (xatou(optarg)) |
| 908 | param.s_feature_ro_compat |= |
| 909 | EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
| 910 | else |
| 911 | param.s_feature_ro_compat &= |
| 912 | ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; |
| 913 | break; |
| 914 | #ifdef EXT2_DYNAMIC_REV |
| 915 | case 'I': |
| 916 | inode_size = xatoi_u(optarg); |
| 917 | break; |
| 918 | #endif |
| 919 | case 'N': |
| 920 | num_inodes = xatoi_u(optarg); |
| 921 | break; |
| 922 | case 'v': |
| 923 | quiet = 0; |
| 924 | break; |
| 925 | case 'q': |
| 926 | quiet = 1; |
| 927 | break; |
| 928 | case 'F': |
| 929 | force = 1; |
| 930 | break; |
| 931 | case 'L': |
| 932 | volume_label = optarg; |
| 933 | break; |
| 934 | case 'M': |
| 935 | mount_dir = optarg; |
| 936 | break; |
| 937 | case 'O': |
| 938 | if (!strcmp(optarg, "none")) { |
| 939 | param.s_feature_compat = 0; |
| 940 | param.s_feature_incompat = 0; |
| 941 | param.s_feature_ro_compat = 0; |
| 942 | break; |
| 943 | } |
| 944 | if (e2p_edit_feature(optarg, |
| 945 | ¶m.s_feature_compat, |
| 946 | ok_features)) { |
| 947 | bb_error_msg_and_die("Invalid filesystem option set: %s", optarg); |
| 948 | } |
| 949 | break; |
| 950 | case 'E': |
| 951 | case 'R': |
| 952 | extended_opts = optarg; |
| 953 | break; |
| 954 | case 'S': |
| 955 | super_only = 1; |
| 956 | break; |
| 957 | case 'T': |
| 958 | fs_type = optarg; |
| 959 | break; |
| 960 | case 'V': |
| 961 | /* Print version number and exit */ |
| 962 | show_version_only = 1; |
| 963 | quiet = 0; |
| 964 | break; |
| 965 | default: |
| 966 | bb_show_usage(); |
| 967 | } |
| 968 | } |
| 969 | if ((optind == argc) /*&& !show_version_only*/) |
| 970 | bb_show_usage(); |
| 971 | device_name = argv[optind++]; |
| 972 | |
| 973 | mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); |
| 974 | |
| 975 | if (show_version_only) { |
| 976 | return 0; |
| 977 | } |
| 978 | |
| 979 | /* |
| 980 | * If there's no blocksize specified and there is a journal |
| 981 | * device, use it to figure out the blocksize |
| 982 | */ |
| 983 | if (blocksize <= 0 && journal_device) { |
| 984 | ext2_filsys jfs; |
| 985 | io_manager io_ptr; |
| 986 | |
| 987 | #ifdef CONFIG_TESTIO_DEBUG |
| 988 | io_ptr = test_io_manager; |
| 989 | test_io_backing_manager = unix_io_manager; |
| 990 | #else |
| 991 | io_ptr = unix_io_manager; |
| 992 | #endif |
| 993 | retval = ext2fs_open(journal_device, |
| 994 | EXT2_FLAG_JOURNAL_DEV_OK, 0, |
| 995 | 0, io_ptr, &jfs); |
| 996 | mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device); |
| 997 | if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) { |
| 998 | bb_error_msg_and_die( |
| 999 | "Journal dev blocksize (%d) smaller than " |
| 1000 | "minimum blocksize %d\n", jfs->blocksize, |
| 1001 | -blocksize); |
| 1002 | } |
| 1003 | blocksize = jfs->blocksize; |
| 1004 | param.s_log_block_size = |
| 1005 | int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); |
| 1006 | ext2fs_close(jfs); |
| 1007 | } |
| 1008 | |
| 1009 | if (blocksize > sys_page_size) { |
| 1010 | mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)", |
| 1011 | blocksize, sys_page_size); |
| 1012 | if (!force) { |
| 1013 | proceed_question(); |
| 1014 | } |
| 1015 | bb_error_msg("Forced to continue"); |
| 1016 | } |
| 1017 | mke2fs_warning_msg(((blocksize > 4096) && |
| 1018 | (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)), |
| 1019 | "some 2.4 kernels do not support " |
| 1020 | "blocksizes greater than 4096 using ext3.\n" |
| 1021 | "Use -b 4096 if this is an issue for you\n"); |
| 1022 | |
| 1023 | if (optind < argc) { |
| 1024 | param.s_blocks_count = parse_num_blocks(argv[optind++], |
| 1025 | param.s_log_block_size); |
| 1026 | mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]); |
| 1027 | } |
| 1028 | if (optind < argc) |
| 1029 | bb_show_usage(); |
| 1030 | |
| 1031 | if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { |
| 1032 | if (!fs_type) |
| 1033 | fs_type = "journal"; |
| 1034 | reserved_ratio = 0; |
| 1035 | param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV; |
| 1036 | param.s_feature_compat = 0; |
| 1037 | param.s_feature_ro_compat = 0; |
| 1038 | } |
| 1039 | if (param.s_rev_level == EXT2_GOOD_OLD_REV && |
| 1040 | (param.s_feature_compat || param.s_feature_ro_compat || |
| 1041 | param.s_feature_incompat)) |
| 1042 | param.s_rev_level = 1; /* Create a revision 1 filesystem */ |
| 1043 | |
| 1044 | check_plausibility(device_name , force); |
| 1045 | check_mount(device_name, force, "filesystem"); |
| 1046 | |
| 1047 | param.s_log_frag_size = param.s_log_block_size; |
| 1048 | |
| 1049 | if (noaction && param.s_blocks_count) { |
| 1050 | dev_size = param.s_blocks_count; |
| 1051 | retval = 0; |
| 1052 | } else { |
| 1053 | retry: |
| 1054 | retval = ext2fs_get_device_size(device_name, |
| 1055 | EXT2_BLOCK_SIZE(¶m), |
| 1056 | &dev_size); |
| 1057 | if ((retval == EFBIG) && |
| 1058 | (blocksize == 0) && |
| 1059 | (param.s_log_block_size == 0)) { |
| 1060 | param.s_log_block_size = 2; |
| 1061 | blocksize = 4096; |
| 1062 | goto retry; |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size"); |
| 1067 | |
| 1068 | if (!param.s_blocks_count) { |
| 1069 | if (retval == EXT2_ET_UNIMPLEMENTED) { |
| 1070 | mke2fs_error_msg_and_die(1, |
| 1071 | "determine device size; you " |
| 1072 | "must specify\nthe size of the " |
| 1073 | "filesystem"); |
| 1074 | } else { |
| 1075 | if (dev_size == 0) { |
| 1076 | bb_error_msg_and_die( |
| 1077 | "Device size reported to be zero. " |
| 1078 | "Invalid partition specified, or\n\t" |
| 1079 | "partition table wasn't reread " |
| 1080 | "after running fdisk, due to\n\t" |
| 1081 | "a modified partition being busy " |
| 1082 | "and in use. You may need to reboot\n\t" |
| 1083 | "to re-read your partition table.\n" |
| 1084 | ); |
| 1085 | } |
| 1086 | param.s_blocks_count = dev_size; |
| 1087 | if (sys_page_size > EXT2_BLOCK_SIZE(¶m)) |
| 1088 | param.s_blocks_count &= ~((sys_page_size / |
| 1089 | EXT2_BLOCK_SIZE(¶m))-1); |
| 1090 | } |
| 1091 | |
| 1092 | } else if (!force && (param.s_blocks_count > dev_size)) { |
| 1093 | bb_error_msg("Filesystem larger than apparent device size"); |
| 1094 | proceed_question(); |
| 1095 | } |
| 1096 | |
| 1097 | /* |
| 1098 | * If the user asked for HAS_JOURNAL, then make sure a journal |
| 1099 | * gets created. |
| 1100 | */ |
| 1101 | if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && |
| 1102 | !journal_size) |
| 1103 | journal_size = -1; |
| 1104 | |
| 1105 | /* Set first meta blockgroup via an environment variable */ |
| 1106 | /* (this is mostly for debugging purposes) */ |
| 1107 | if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) && |
| 1108 | ((tmp = getenv("MKE2FS_FIRST_META_BG")))) |
| 1109 | param.s_first_meta_bg = atoi(tmp); |
| 1110 | |
| 1111 | /* Get the hardware sector size, if available */ |
| 1112 | retval = ext2fs_get_device_sectsize(device_name, §or_size); |
| 1113 | mke2fs_error_msg_and_die(retval, "determine hardware sector size"); |
| 1114 | |
| 1115 | if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL) |
| 1116 | sector_size = atoi(tmp); |
| 1117 | |
| 1118 | set_fs_defaults(fs_type, ¶m, blocksize, sector_size, &inode_ratio); |
| 1119 | blocksize = EXT2_BLOCK_SIZE(¶m); |
| 1120 | |
| 1121 | if (extended_opts) |
| 1122 | parse_extended_opts(¶m, extended_opts); |
| 1123 | |
| 1124 | /* Since sparse_super is the default, we would only have a problem |
| 1125 | * here if it was explicitly disabled. |
| 1126 | */ |
| 1127 | if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) && |
| 1128 | !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) { |
| 1129 | bb_error_msg_and_die("reserved online resize blocks not supported " |
| 1130 | "on non-sparse filesystem"); |
| 1131 | } |
| 1132 | |
| 1133 | if (param.s_blocks_per_group) { |
| 1134 | if (param.s_blocks_per_group < 256 || |
| 1135 | param.s_blocks_per_group > 8 * (unsigned) blocksize) { |
| 1136 | bb_error_msg_and_die("blocks per group count out of range"); |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | if (!force && param.s_blocks_count >= (1 << 31)) { |
| 1141 | bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n" |
| 1142 | "\t (8TB using a blocksize of 4k) are currently supported."); |
| 1143 | } |
| 1144 | |
| 1145 | if (inode_size) { |
| 1146 | if (inode_size < EXT2_GOOD_OLD_INODE_SIZE || |
| 1147 | inode_size > EXT2_BLOCK_SIZE(¶m) || |
| 1148 | inode_size & (inode_size - 1)) { |
| 1149 | bb_error_msg_and_die("invalid inode size %d (min %d/max %d)", |
| 1150 | inode_size, EXT2_GOOD_OLD_INODE_SIZE, |
| 1151 | blocksize); |
| 1152 | } |
| 1153 | mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE), |
| 1154 | "%d-byte inodes not usable on most systems", |
| 1155 | inode_size); |
| 1156 | param.s_inode_size = inode_size; |
| 1157 | } |
| 1158 | |
| 1159 | /* |
| 1160 | * Calculate number of inodes based on the inode ratio |
| 1161 | */ |
| 1162 | param.s_inodes_count = num_inodes ? num_inodes : |
| 1163 | ((__u64) param.s_blocks_count * blocksize) |
| 1164 | / inode_ratio; |
| 1165 | |
| 1166 | /* |
| 1167 | * Calculate number of blocks to reserve |
| 1168 | */ |
| 1169 | param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100; |
| 1170 | return 1; |
| 1171 | } |
| 1172 | |
| 1173 | static void mke2fs_clean_up(void) |
| 1174 | { |
| 1175 | if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); |
| 1176 | } |
| 1177 | |
Bernhard Reutner-Fischer | febe3c4 | 2007-04-04 20:52:03 +0000 | [diff] [blame] | 1178 | int mke2fs_main (int argc, char **argv); |
| 1179 | int mke2fs_main (int argc, char **argv) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1180 | { |
| 1181 | errcode_t retval; |
| 1182 | ext2_filsys fs; |
| 1183 | badblocks_list bb_list = 0; |
| 1184 | unsigned int i; |
| 1185 | int val; |
| 1186 | io_manager io_ptr; |
| 1187 | |
| 1188 | if (ENABLE_FEATURE_CLEAN_UP) |
| 1189 | atexit(mke2fs_clean_up); |
Denis Vlasenko | d6855d1 | 2008-09-27 14:03:25 +0000 | [diff] [blame] | 1190 | if (!PRS(argc, argv)) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1191 | return 0; |
| 1192 | |
| 1193 | #ifdef CONFIG_TESTIO_DEBUG |
| 1194 | io_ptr = test_io_manager; |
| 1195 | test_io_backing_manager = unix_io_manager; |
| 1196 | #else |
| 1197 | io_ptr = unix_io_manager; |
| 1198 | #endif |
| 1199 | |
| 1200 | /* |
| 1201 | * Initialize the superblock.... |
| 1202 | */ |
| 1203 | retval = ext2fs_initialize(device_name, 0, ¶m, |
| 1204 | io_ptr, &fs); |
| 1205 | mke2fs_error_msg_and_die(retval, "set up superblock"); |
| 1206 | |
| 1207 | /* |
| 1208 | * Wipe out the old on-disk superblock |
| 1209 | */ |
| 1210 | if (!noaction) |
| 1211 | zap_sector(fs, 2, 6); |
| 1212 | |
| 1213 | /* |
| 1214 | * Generate a UUID for it... |
| 1215 | */ |
| 1216 | uuid_generate(fs->super->s_uuid); |
| 1217 | |
| 1218 | /* |
| 1219 | * Initialize the directory index variables |
| 1220 | */ |
| 1221 | fs->super->s_def_hash_version = EXT2_HASH_TEA; |
| 1222 | uuid_generate((unsigned char *) fs->super->s_hash_seed); |
| 1223 | |
| 1224 | /* |
| 1225 | * Add "jitter" to the superblock's check interval so that we |
| 1226 | * don't check all the filesystems at the same time. We use a |
| 1227 | * kludgy hack of using the UUID to derive a random jitter value. |
| 1228 | */ |
Denis Vlasenko | b71c668 | 2007-07-21 15:08:09 +0000 | [diff] [blame] | 1229 | for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++) |
Denis Vlasenko | c4f623e | 2006-12-26 01:30:59 +0000 | [diff] [blame] | 1230 | val += fs->super->s_uuid[i]; |
| 1231 | fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT; |
| 1232 | |
| 1233 | /* |
| 1234 | * Override the creator OS, if applicable |
| 1235 | */ |
| 1236 | if (creator_os && !set_os(fs->super, creator_os)) { |
| 1237 | bb_error_msg_and_die("unknown os - %s", creator_os); |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * For the Hurd, we will turn off filetype since it doesn't |
| 1242 | * support it. |
| 1243 | */ |
| 1244 | if (fs->super->s_creator_os == EXT2_OS_HURD) |
| 1245 | fs->super->s_feature_incompat &= |
| 1246 | ~EXT2_FEATURE_INCOMPAT_FILETYPE; |
| 1247 | |
| 1248 | /* |
| 1249 | * Set the volume label... |
| 1250 | */ |
| 1251 | if (volume_label) { |
| 1252 | snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label); |
| 1253 | } |
| 1254 | |
| 1255 | /* |
| 1256 | * Set the last mount directory |
| 1257 | */ |
| 1258 | if (mount_dir) { |
| 1259 | snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir); |
| 1260 | } |
| 1261 | |
| 1262 | if (!quiet || noaction) |
| 1263 | show_stats(fs); |
| 1264 | |
| 1265 | if (noaction) |
| 1266 | return 0; |
| 1267 | |
| 1268 | if (fs->super->s_feature_incompat & |
| 1269 | EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { |
| 1270 | create_journal_dev(fs); |
| 1271 | return (ext2fs_close(fs) ? 1 : 0); |
| 1272 | } |
| 1273 | |
| 1274 | if (bad_blocks_filename) |
| 1275 | read_bb_file(fs, &bb_list, bad_blocks_filename); |
| 1276 | if (cflag) |
| 1277 | test_disk(fs, &bb_list); |
| 1278 | |
| 1279 | handle_bad_blocks(fs, bb_list); |
| 1280 | fs->stride = fs_stride; |
| 1281 | retval = ext2fs_allocate_tables(fs); |
| 1282 | mke2fs_error_msg_and_die(retval, "allocate filesystem tables"); |
| 1283 | if (super_only) { |
| 1284 | fs->super->s_state |= EXT2_ERROR_FS; |
| 1285 | fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY); |
| 1286 | } else { |
| 1287 | /* rsv must be a power of two (64kB is MD RAID sb alignment) */ |
| 1288 | unsigned int rsv = 65536 / fs->blocksize; |
| 1289 | unsigned long blocks = fs->super->s_blocks_count; |
| 1290 | unsigned long start; |
| 1291 | blk_t ret_blk; |
| 1292 | |
| 1293 | #ifdef ZAP_BOOTBLOCK |
| 1294 | zap_sector(fs, 0, 2); |
| 1295 | #endif |
| 1296 | |
| 1297 | /* |
| 1298 | * Wipe out any old MD RAID (or other) metadata at the end |
| 1299 | * of the device. This will also verify that the device is |
| 1300 | * as large as we think. Be careful with very small devices. |
| 1301 | */ |
| 1302 | start = (blocks & ~(rsv - 1)); |
| 1303 | if (start > rsv) |
| 1304 | start -= rsv; |
| 1305 | if (start > 0) |
| 1306 | retval = zero_blocks(fs, start, blocks - start, |
| 1307 | NULL, &ret_blk, NULL); |
| 1308 | |
| 1309 | mke2fs_warning_msg(retval, "cannot zero block %u at end of filesystem", ret_blk); |
| 1310 | write_inode_tables(fs); |
| 1311 | create_root_dir(fs); |
| 1312 | create_lost_and_found(fs); |
| 1313 | reserve_inodes(fs); |
| 1314 | create_bad_block_inode(fs, bb_list); |
| 1315 | if (fs->super->s_feature_compat & |
| 1316 | EXT2_FEATURE_COMPAT_RESIZE_INODE) { |
| 1317 | retval = ext2fs_create_resize_inode(fs); |
| 1318 | mke2fs_error_msg_and_die(retval, "reserve blocks for online resize"); |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | if (journal_device) { |
| 1323 | make_journal_device(journal_device, fs, quiet, force); |
| 1324 | } else if (journal_size) { |
| 1325 | make_journal_blocks(fs, journal_size, journal_flags, quiet); |
| 1326 | } |
| 1327 | |
| 1328 | mke2fs_verbose("Writing superblocks and filesystem accounting information: "); |
| 1329 | retval = ext2fs_flush(fs); |
| 1330 | mke2fs_warning_msg(retval, "had trouble writing out superblocks"); |
| 1331 | mke2fs_verbose_done(); |
| 1332 | if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG")) |
| 1333 | print_check_message(fs); |
| 1334 | val = ext2fs_close(fs); |
| 1335 | return (retval || val) ? 1 : 0; |
| 1336 | } |