1/* vi: set sw=4 ts=4: */ 2/* 3 * tune2fs.c - Change the file system parameters on an ext2 file system 4 * 5 * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr> 6 * Laboratoire MASI, Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 * 9 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. 10 * 11 * %Begin-Header% 12 * This file may be redistributed under the terms of the GNU Public 13 * License. 14 * %End-Header% 15 */ 16 17/* 18 * History: 19 * 93/06/01 - Creation 20 * 93/10/31 - Added the -c option to change the maximal mount counts 21 * 93/12/14 - Added -l flag to list contents of superblock 22 * M.J.E. Mol (marcel@duteca.et.tudelft.nl) 23 * F.W. ten Wolde (franky@duteca.et.tudelft.nl) 24 * 93/12/29 - Added the -e option to change errors behavior 25 * 94/02/27 - Ported to use the ext2fs library 26 * 94/03/06 - Added the checks interval from Uwe Ohse (uwe@tirka.gun.de) 27 */ 28 29#include <sys/types.h> 30#include <fcntl.h> 31#include <stdio.h> 32#include <stdlib.h> 33#include <string.h> 34#include <time.h> 35#include <unistd.h> 36#include <getopt.h> 37 38#include "e2fsbb.h" 39#include "ext2fs/ext2_fs.h" 40#include "ext2fs/ext2fs.h" 41#include "uuid/uuid.h" 42#include "e2p/e2p.h" 43#include "ext2fs/kernel-jbd.h" 44#include "util.h" 45#include "blkid/blkid.h" 46 47#include "libbb.h" 48 49static char * device_name = NULL; 50static char * new_label, *new_last_mounted, *new_UUID; 51static char * io_options; 52static int c_flag, C_flag, e_flag, f_flag, g_flag, i_flag, l_flag, L_flag; 53static int m_flag, M_flag, r_flag, s_flag = -1, u_flag, U_flag, T_flag; 54static time_t last_check_time; 55static int print_label; 56static int max_mount_count, mount_count, mount_flags; 57static unsigned long interval, reserved_blocks; 58static unsigned reserved_ratio; 59static unsigned long resgid, resuid; 60static unsigned short errors; 61static int open_flag; 62static char *features_cmd; 63static char *mntopts_cmd; 64 65static int journal_size, journal_flags; 66static char *journal_device = NULL; 67 68static const char *please_fsck = "Please run e2fsck on the filesystem\n"; 69 70static __u32 ok_features[3] = { 71 EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_DIR_INDEX, 72 EXT2_FEATURE_INCOMPAT_FILETYPE, 73 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 74}; 75 76/* 77 * Remove an external journal from the filesystem 78 */ 79static void remove_journal_device(ext2_filsys fs) 80{ 81 char *journal_path; 82 ext2_filsys jfs; 83 char buf[1024]; 84 journal_superblock_t *jsb; 85 int i, nr_users; 86 errcode_t retval; 87 int commit_remove_journal = 0; 88 io_manager io_ptr; 89 90 if (f_flag) 91 commit_remove_journal = 1; /* force removal even if error */ 92 93 uuid_unparse(fs->super->s_journal_uuid, buf); 94 journal_path = blkid_get_devname(NULL, "UUID", buf); 95 96 if (!journal_path) { 97 journal_path = 98 ext2fs_find_block_device(fs->super->s_journal_dev); 99 if (!journal_path) 100 return; 101 } 102 103 io_ptr = unix_io_manager; 104 retval = ext2fs_open(journal_path, EXT2_FLAG_RW| 105 EXT2_FLAG_JOURNAL_DEV_OK, 0, 106 fs->blocksize, io_ptr, &jfs); 107 if (retval) { 108 bb_error_msg("Failed to open external journal"); 109 goto no_valid_journal; 110 } 111 if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) { 112 bb_error_msg("%s is not a journal device", journal_path); 113 goto no_valid_journal; 114 } 115 116 /* Get the journal superblock */ 117 if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) { 118 bb_error_msg("Failed to read journal superblock"); 119 goto no_valid_journal; 120 } 121 122 jsb = (journal_superblock_t *) buf; 123 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 124 (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) { 125 bb_error_msg("Journal superblock not found!"); 126 goto no_valid_journal; 127 } 128 129 /* Find the filesystem UUID */ 130 nr_users = ntohl(jsb->s_nr_users); 131 for (i=0; i < nr_users; i++) { 132 if (memcmp(fs->super->s_uuid, 133 &jsb->s_users[i*16], 16) == 0) 134 break; 135 } 136 if (i >= nr_users) { 137 bb_error_msg("Filesystem's UUID not found on journal device"); 138 commit_remove_journal = 1; 139 goto no_valid_journal; 140 } 141 nr_users--; 142 for (i=0; i < nr_users; i++) 143 memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16); 144 jsb->s_nr_users = htonl(nr_users); 145 146 /* Write back the journal superblock */ 147 if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) { 148 bb_error_msg("Failed to write journal superblock"); 149 goto no_valid_journal; 150 } 151 152 commit_remove_journal = 1; 153 154no_valid_journal: 155 if (commit_remove_journal == 0) 156 bb_error_msg_and_die("Journal NOT removed"); 157 fs->super->s_journal_dev = 0; 158 uuid_clear(fs->super->s_journal_uuid); 159 ext2fs_mark_super_dirty(fs); 160 puts("Journal removed"); 161 free(journal_path); 162} 163 164/* Helper function for remove_journal_inode */ 165static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr, 166 int blockcnt EXT2FS_ATTR((unused)), 167 void *private EXT2FS_ATTR((unused))) 168{ 169 blk_t block; 170 int group; 171 172 block = *blocknr; 173 ext2fs_unmark_block_bitmap(fs->block_map,block); 174 group = ext2fs_group_of_blk(fs, block); 175 fs->group_desc[group].bg_free_blocks_count++; 176 fs->super->s_free_blocks_count++; 177 return 0; 178} 179 180/* 181 * Remove the journal inode from the filesystem 182 */ 183static void remove_journal_inode(ext2_filsys fs) 184{ 185 struct ext2_inode inode; 186 errcode_t retval; 187 ino_t ino = fs->super->s_journal_inum; 188 char *msg = "to read"; 189 char *s = "journal inode"; 190 191 retval = ext2fs_read_inode(fs, ino, &inode); 192 if (retval) 193 goto REMOVE_JOURNAL_INODE_ERROR; 194 if (ino == EXT2_JOURNAL_INO) { 195 retval = ext2fs_read_bitmaps(fs); 196 if (retval) { 197 msg = "to read bitmaps"; 198 s = ""; 199 goto REMOVE_JOURNAL_INODE_ERROR; 200 } 201 retval = ext2fs_block_iterate(fs, ino, 0, NULL, 202 release_blocks_proc, NULL); 203 if (retval) { 204 msg = "clearing"; 205 goto REMOVE_JOURNAL_INODE_ERROR; 206 } 207 memset(&inode, 0, sizeof(inode)); 208 ext2fs_mark_bb_dirty(fs); 209 fs->flags &= ~EXT2_FLAG_SUPER_ONLY; 210 } else 211 inode.i_flags &= ~EXT2_IMMUTABLE_FL; 212 retval = ext2fs_write_inode(fs, ino, &inode); 213 if (retval) { 214 msg = "writing"; 215REMOVE_JOURNAL_INODE_ERROR: 216 bb_error_msg_and_die("Failed %s %s", msg, s); 217 } 218 fs->super->s_journal_inum = 0; 219 ext2fs_mark_super_dirty(fs); 220} 221 222/* 223 * Update the default mount options 224 */ 225static void update_mntopts(ext2_filsys fs, char *mntopts) 226{ 227 struct ext2_super_block *sb= fs->super; 228 229 if (e2p_edit_mntopts(mntopts, &sb->s_default_mount_opts, ~0)) 230 bb_error_msg_and_die("Invalid mount option set: %s", mntopts); 231 ext2fs_mark_super_dirty(fs); 232} 233 234/* 235 * Update the feature set as provided by the user. 236 */ 237static void update_feature_set(ext2_filsys fs, char *features) 238{ 239 int sparse, old_sparse, filetype, old_filetype; 240 int journal, old_journal, dxdir, old_dxdir; 241 struct ext2_super_block *sb= fs->super; 242 __u32 old_compat, old_incompat, old_ro_compat; 243 244 old_compat = sb->s_feature_compat; 245 old_ro_compat = sb->s_feature_ro_compat; 246 old_incompat = sb->s_feature_incompat; 247 248 old_sparse = sb->s_feature_ro_compat & 249 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 250 old_filetype = sb->s_feature_incompat & 251 EXT2_FEATURE_INCOMPAT_FILETYPE; 252 old_journal = sb->s_feature_compat & 253 EXT3_FEATURE_COMPAT_HAS_JOURNAL; 254 old_dxdir = sb->s_feature_compat & 255 EXT2_FEATURE_COMPAT_DIR_INDEX; 256 if (e2p_edit_feature(features, &sb->s_feature_compat, ok_features)) 257 bb_error_msg_and_die("Invalid filesystem option set: %s", features); 258 sparse = sb->s_feature_ro_compat & 259 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 260 filetype = sb->s_feature_incompat & 261 EXT2_FEATURE_INCOMPAT_FILETYPE; 262 journal = sb->s_feature_compat & 263 EXT3_FEATURE_COMPAT_HAS_JOURNAL; 264 dxdir = sb->s_feature_compat & 265 EXT2_FEATURE_COMPAT_DIR_INDEX; 266 if (old_journal && !journal) { 267 if ((mount_flags & EXT2_MF_MOUNTED) && 268 !(mount_flags & EXT2_MF_READONLY)) { 269 bb_error_msg_and_die( 270 "The has_journal flag may only be " 271 "cleared when the filesystem is\n" 272 "unmounted or mounted " 273 "read-only"); 274 } 275 if (sb->s_feature_incompat & 276 EXT3_FEATURE_INCOMPAT_RECOVER) { 277 bb_error_msg_and_die( 278 "The needs_recovery flag is set. " 279 "%s before clearing the has_journal flag.", 280 please_fsck); 281 } 282 if (sb->s_journal_inum) { 283 remove_journal_inode(fs); 284 } 285 if (sb->s_journal_dev) { 286 remove_journal_device(fs); 287 } 288 } 289 if (journal && !old_journal) { 290 /* 291 * If adding a journal flag, let the create journal 292 * code below handle creating setting the flag and 293 * creating the journal. We supply a default size if 294 * necessary. 295 */ 296 if (!journal_size) 297 journal_size = -1; 298 sb->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; 299 } 300 if (dxdir && !old_dxdir) { 301 if (!sb->s_def_hash_version) 302 sb->s_def_hash_version = EXT2_HASH_TEA; 303 if (uuid_is_null((unsigned char *) sb->s_hash_seed)) 304 uuid_generate((unsigned char *) sb->s_hash_seed); 305 } 306 307 if (sb->s_rev_level == EXT2_GOOD_OLD_REV && 308 (sb->s_feature_compat || sb->s_feature_ro_compat || 309 sb->s_feature_incompat)) 310 ext2fs_update_dynamic_rev(fs); 311 if ((sparse != old_sparse) || 312 (filetype != old_filetype)) { 313 sb->s_state &= ~EXT2_VALID_FS; 314 printf("\n%s\n", please_fsck); 315 } 316 if ((old_compat != sb->s_feature_compat) || 317 (old_ro_compat != sb->s_feature_ro_compat) || 318 (old_incompat != sb->s_feature_incompat)) 319 ext2fs_mark_super_dirty(fs); 320} 321 322/* 323 * Add a journal to the filesystem. 324 */ 325static void add_journal(ext2_filsys fs) 326{ 327 if (fs->super->s_feature_compat & 328 EXT3_FEATURE_COMPAT_HAS_JOURNAL) { 329 bb_error_msg_and_die("The filesystem already has a journal"); 330 } 331 if (journal_device) { 332 make_journal_device(journal_device, fs, 0, 0); 333 } else if (journal_size) { 334 make_journal_blocks(fs, journal_size, journal_flags, 0); 335 /* 336 * If the filesystem wasn't mounted, we need to force 337 * the block group descriptors out. 338 */ 339 if ((mount_flags & EXT2_MF_MOUNTED) == 0) 340 fs->flags &= ~EXT2_FLAG_SUPER_ONLY; 341 } 342 print_check_message(fs); 343} 344 345/* 346 * Busybox stuff 347 */ 348static char * x_blkid_get_devname(const char *token) 349{ 350 char * dev_name; 351 352 if (!(dev_name = blkid_get_devname(NULL, token, NULL))) 353 bb_error_msg_and_die("Unable to resolve '%s'", token); 354 return dev_name; 355} 356 357#ifdef CONFIG_E2LABEL 358static void parse_e2label_options(int argc, char ** argv) 359{ 360 if ((argc < 2) || (argc > 3)) 361 bb_show_usage(); 362 io_options = strchr(argv[1], '?'); 363 if (io_options) 364 *io_options++ = 0; 365 device_name = x_blkid_get_devname(argv[1]); 366 if (argc == 3) { 367 open_flag = EXT2_FLAG_RW | EXT2_FLAG_JOURNAL_DEV_OK; 368 L_flag = 1; 369 new_label = argv[2]; 370 } else 371 print_label++; 372} 373#else 374#define parse_e2label_options(x,y) 375#endif 376 377static time_t parse_time(char *str) 378{ 379 struct tm ts; 380 381 if (strcmp(str, "now") == 0) { 382 return time(0); 383 } 384 memset(&ts, 0, sizeof(ts)); 385#ifdef HAVE_STRPTIME 386 strptime(str, "%Y%m%d%H%M%S", &ts); 387#else 388 sscanf(str, "%4d%2d%2d%2d%2d%2d", &ts.tm_year, &ts.tm_mon, 389 &ts.tm_mday, &ts.tm_hour, &ts.tm_min, &ts.tm_sec); 390 ts.tm_year -= 1900; 391 ts.tm_mon -= 1; 392 if (ts.tm_year < 0 || ts.tm_mon < 0 || ts.tm_mon > 11 || 393 ts.tm_mday < 0 || ts.tm_mday > 31 || ts.tm_hour > 23 || 394 ts.tm_min > 59 || ts.tm_sec > 61) 395 ts.tm_mday = 0; 396#endif 397 if (ts.tm_mday == 0) { 398 bb_error_msg_and_die("Cannot parse date/time specifier: %s", str); 399 } 400 return mktime(&ts); 401} 402 403static void parse_tune2fs_options(int argc, char **argv) 404{ 405 int c; 406 char * tmp; 407 408 printf("tune2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); 409 while ((c = getopt(argc, argv, "c:e:fg:i:jlm:o:r:s:u:C:J:L:M:O:T:U:")) != EOF) 410 switch (c) 411 { 412 case 'c': 413 max_mount_count = xatou_range(optarg, 0, 16000); 414 if (max_mount_count == 0) 415 max_mount_count = -1; 416 c_flag = 1; 417 open_flag = EXT2_FLAG_RW; 418 break; 419 case 'C': 420 mount_count = xatou_range(optarg, 0, 16000); 421 C_flag = 1; 422 open_flag = EXT2_FLAG_RW; 423 break; 424 case 'e': 425 if (strcmp (optarg, "continue") == 0) 426 errors = EXT2_ERRORS_CONTINUE; 427 else if (strcmp (optarg, "remount-ro") == 0) 428 errors = EXT2_ERRORS_RO; 429 else if (strcmp (optarg, "panic") == 0) 430 errors = EXT2_ERRORS_PANIC; 431 else { 432 bb_error_msg_and_die("bad error behavior - %s", optarg); 433 } 434 e_flag = 1; 435 open_flag = EXT2_FLAG_RW; 436 break; 437 case 'f': /* Force */ 438 f_flag = 1; 439 break; 440 case 'g': 441 resgid = bb_strtoul(optarg, NULL, 10); 442 if (errno) 443 resgid = xgroup2gid(optarg); 444 g_flag = 1; 445 open_flag = EXT2_FLAG_RW; 446 break; 447 case 'i': 448 interval = strtoul(optarg, &tmp, 0); 449 switch (*tmp) { 450 case 's': 451 tmp++; 452 break; 453 case '\0': 454 case 'd': 455 case 'D': /* days */ 456 interval *= 86400; 457 if (*tmp != '\0') 458 tmp++; 459 break; 460 case 'm': 461 case 'M': /* months! */ 462 interval *= 86400 * 30; 463 tmp++; 464 break; 465 case 'w': 466 case 'W': /* weeks */ 467 interval *= 86400 * 7; 468 tmp++; 469 break; 470 } 471 if (*tmp || interval > (365 * 86400)) { 472 bb_error_msg_and_die("bad interval - %s", optarg); 473 } 474 i_flag = 1; 475 open_flag = EXT2_FLAG_RW; 476 break; 477 case 'j': 478 if (!journal_size) 479 journal_size = -1; 480 open_flag = EXT2_FLAG_RW; 481 break; 482 case 'J': 483 parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); 484 open_flag = EXT2_FLAG_RW; 485 break; 486 case 'l': 487 l_flag = 1; 488 break; 489 case 'L': 490 new_label = optarg; 491 L_flag = 1; 492 open_flag = EXT2_FLAG_RW | 493 EXT2_FLAG_JOURNAL_DEV_OK; 494 break; 495 case 'm': 496 reserved_ratio = xatou_range(optarg, 0, 50); 497 m_flag = 1; 498 open_flag = EXT2_FLAG_RW; 499 break; 500 case 'M': 501 new_last_mounted = optarg; 502 M_flag = 1; 503 open_flag = EXT2_FLAG_RW; 504 break; 505 case 'o': 506 if (mntopts_cmd) { 507 bb_error_msg_and_die("-o may only be specified once"); 508 } 509 mntopts_cmd = optarg; 510 open_flag = EXT2_FLAG_RW; 511 break; 512 513 case 'O': 514 if (features_cmd) { 515 bb_error_msg_and_die("-O may only be specified once"); 516 } 517 features_cmd = optarg; 518 open_flag = EXT2_FLAG_RW; 519 break; 520 case 'r': 521 reserved_blocks = xatoul(optarg); 522 r_flag = 1; 523 open_flag = EXT2_FLAG_RW; 524 break; 525 case 's': 526 s_flag = atoi(optarg); 527 open_flag = EXT2_FLAG_RW; 528 break; 529 case 'T': 530 T_flag = 1; 531 last_check_time = parse_time(optarg); 532 open_flag = EXT2_FLAG_RW; 533 break; 534 case 'u': 535 resuid = bb_strtoul(optarg, NULL, 10); 536 if (errno) 537 resuid = xuname2uid(optarg); 538 u_flag = 1; 539 open_flag = EXT2_FLAG_RW; 540 break; 541 case 'U': 542 new_UUID = optarg; 543 U_flag = 1; 544 open_flag = EXT2_FLAG_RW | 545 EXT2_FLAG_JOURNAL_DEV_OK; 546 break; 547 default: 548 bb_show_usage(); 549 } 550 if (optind < argc - 1 || optind == argc) 551 bb_show_usage(); 552 if (!open_flag && !l_flag) 553 bb_show_usage(); 554 io_options = strchr(argv[optind], '?'); 555 if (io_options) 556 *io_options++ = 0; 557 device_name = x_blkid_get_devname(argv[optind]); 558} 559 560#ifdef CONFIG_FINDFS 561static ATTRIBUTE_NORETURN void do_findfs(int argc, char **argv) 562{ 563 if ((argc != 2) || 564 (strncmp(argv[1], "LABEL=", 6) && strncmp(argv[1], "UUID=", 5))) 565 bb_show_usage(); 566 device_name = x_blkid_get_devname(argv[1]); 567 puts(device_name); 568 exit(0); 569} 570#else 571#define do_findfs(x, y) 572#endif 573 574static void tune2fs_clean_up(void) 575{ 576 if (ENABLE_FEATURE_CLEAN_UP && device_name) free(device_name); 577 if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); 578} 579 580int tune2fs_main(int argc, char **argv); 581int tune2fs_main(int argc, char **argv) 582{ 583 errcode_t retval; 584 ext2_filsys fs; 585 struct ext2_super_block *sb; 586 io_manager io_ptr; 587 588 if (ENABLE_FEATURE_CLEAN_UP) 589 atexit(tune2fs_clean_up); 590 591 if (ENABLE_FINDFS && (applet_name[0] == 'f')) /* findfs */ 592 do_findfs(argc, argv); /* no return */ 593 else if (ENABLE_E2LABEL && (applet_name[0] == 'e')) /* e2label */ 594 parse_e2label_options(argc, argv); 595 else 596 parse_tune2fs_options(argc, argv); /* tune2fs */ 597 598 io_ptr = unix_io_manager; 599 retval = ext2fs_open2(device_name, io_options, open_flag, 600 0, 0, io_ptr, &fs); 601 if (retval) 602 bb_error_msg_and_die("No valid superblock on %s", device_name); 603 sb = fs->super; 604 if (print_label) { 605 /* For e2label emulation */ 606 printf("%.*s\n", (int) sizeof(sb->s_volume_name), 607 sb->s_volume_name); 608 return 0; 609 } 610 retval = ext2fs_check_if_mounted(device_name, &mount_flags); 611 if (retval) 612 bb_error_msg_and_die("cannot determine if %s is mounted", device_name); 613 /* Normally we only need to write out the superblock */ 614 fs->flags |= EXT2_FLAG_SUPER_ONLY; 615 616 if (c_flag) { 617 sb->s_max_mnt_count = max_mount_count; 618 ext2fs_mark_super_dirty(fs); 619 printf("Setting maximal mount count to %d\n", max_mount_count); 620 } 621 if (C_flag) { 622 sb->s_mnt_count = mount_count; 623 ext2fs_mark_super_dirty(fs); 624 printf("Setting current mount count to %d\n", mount_count); 625 } 626 if (e_flag) { 627 sb->s_errors = errors; 628 ext2fs_mark_super_dirty(fs); 629 printf("Setting error behavior to %d\n", errors); 630 } 631 if (g_flag) { 632 sb->s_def_resgid = resgid; 633 ext2fs_mark_super_dirty(fs); 634 printf("Setting reserved blocks gid to %lu\n", resgid); 635 } 636 if (i_flag) { 637 sb->s_checkinterval = interval; 638 ext2fs_mark_super_dirty(fs); 639 printf("Setting interval between check %lu seconds\n", interval); 640 } 641 if (m_flag) { 642 sb->s_r_blocks_count = (sb->s_blocks_count / 100) 643 * reserved_ratio; 644 ext2fs_mark_super_dirty(fs); 645 printf("Setting reserved blocks percentage to %u (%u blocks)\n", 646 reserved_ratio, sb->s_r_blocks_count); 647 } 648 if (r_flag) { 649 if (reserved_blocks >= sb->s_blocks_count/2) 650 bb_error_msg_and_die("reserved blocks count is too big (%lu)", reserved_blocks); 651 sb->s_r_blocks_count = reserved_blocks; 652 ext2fs_mark_super_dirty(fs); 653 printf("Setting reserved blocks count to %lu\n", reserved_blocks); 654 } 655 if (s_flag == 1) { 656 if (sb->s_feature_ro_compat & 657 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER) 658 bb_error_msg("\nThe filesystem already has sparse superblocks"); 659 else { 660 sb->s_feature_ro_compat |= 661 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 662 sb->s_state &= ~EXT2_VALID_FS; 663 ext2fs_mark_super_dirty(fs); 664 printf("\nSparse superblock flag set. %s", please_fsck); 665 } 666 } 667 if (s_flag == 0) { 668 if (!(sb->s_feature_ro_compat & 669 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) 670 bb_error_msg("\nThe filesystem already has sparse superblocks disabled"); 671 else { 672 sb->s_feature_ro_compat &= 673 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; 674 sb->s_state &= ~EXT2_VALID_FS; 675 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 676 ext2fs_mark_super_dirty(fs); 677 printf("\nSparse superblock flag cleared. %s", please_fsck); 678 } 679 } 680 if (T_flag) { 681 sb->s_lastcheck = last_check_time; 682 ext2fs_mark_super_dirty(fs); 683 printf("Setting time filesystem last checked to %s\n", 684 ctime(&last_check_time)); 685 } 686 if (u_flag) { 687 sb->s_def_resuid = resuid; 688 ext2fs_mark_super_dirty(fs); 689 printf("Setting reserved blocks uid to %lu\n", resuid); 690 } 691 if (L_flag) { 692 if (strlen(new_label) > sizeof(sb->s_volume_name)) 693 bb_error_msg("Warning: label too long, truncating"); 694 memset(sb->s_volume_name, 0, sizeof(sb->s_volume_name)); 695 safe_strncpy(sb->s_volume_name, new_label, 696 sizeof(sb->s_volume_name)); 697 ext2fs_mark_super_dirty(fs); 698 } 699 if (M_flag) { 700 memset(sb->s_last_mounted, 0, sizeof(sb->s_last_mounted)); 701 safe_strncpy(sb->s_last_mounted, new_last_mounted, 702 sizeof(sb->s_last_mounted)); 703 ext2fs_mark_super_dirty(fs); 704 } 705 if (mntopts_cmd) 706 update_mntopts(fs, mntopts_cmd); 707 if (features_cmd) 708 update_feature_set(fs, features_cmd); 709 if (journal_size || journal_device) 710 add_journal(fs); 711 712 if (U_flag) { 713 if ((strcasecmp(new_UUID, "null") == 0) || 714 (strcasecmp(new_UUID, "clear") == 0)) { 715 uuid_clear(sb->s_uuid); 716 } else if (strcasecmp(new_UUID, "time") == 0) { 717 uuid_generate_time(sb->s_uuid); 718 } else if (strcasecmp(new_UUID, "random") == 0) { 719 uuid_generate(sb->s_uuid); 720 } else if (uuid_parse(new_UUID, sb->s_uuid)) { 721 bb_error_msg_and_die("Invalid UUID format"); 722 } 723 ext2fs_mark_super_dirty(fs); 724 } 725 726 if (l_flag) 727 list_super (sb); 728 return (ext2fs_close (fs) ? 1 : 0); 729} 730