2 * main.c --- ext2 resizer main program
4 * Copyright (C) 1997, 1998 by Theodore Ts'o and
7 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
10 * This file may be redistributed under the terms of the GNU Public
15 #ifndef _LARGEFILE_SOURCE
16 #define _LARGEFILE_SOURCE
18 #ifndef _LARGEFILE64_SOURCE
19 #define _LARGEFILE64_SOURCE
33 #include <sys/types.h>
40 #include "resize2fs.h"
42 #include "../version.h"
45 static char *device_name, *io_options;
47 static void usage (char *prog)
49 fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-P] "
50 "[-p] device [-b|-s|new_size] [-S RAID-stride] "
51 "[-z undo_file]\n\n"),
52 prog ? prog : "resize2fs");
57 static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
58 unsigned long cur, unsigned long max)
60 ext2_sim_progmeter progress;
64 progress = (ext2_sim_progmeter) rfs->prog_data;
69 ext2fs_progress_close(progress);
72 case E2_RSZ_EXTEND_ITABLE_PASS:
73 label = _("Extending the inode table");
75 case E2_RSZ_BLOCK_RELOC_PASS:
76 label = _("Relocating blocks");
78 case E2_RSZ_INODE_SCAN_PASS:
79 label = _("Scanning inode table");
81 case E2_RSZ_INODE_REF_UPD_PASS:
82 label = _("Updating inode references");
84 case E2_RSZ_MOVE_ITABLE_PASS:
85 label = _("Moving inode table");
88 label = _("Unknown pass?!?");
91 printf(_("Begin pass %d (max = %lu)\n"), pass, max);
92 retval = ext2fs_progress_init(&progress, label, 30,
96 rfs->prog_data = (void *) progress;
99 ext2fs_progress_update(progress, cur);
102 ext2fs_progress_close(progress);
109 static void determine_fs_stride(ext2_filsys fs)
112 unsigned long long sum;
113 unsigned int has_sb, prev_has_sb = 0, num;
114 unsigned int flexbg_size = 1U << fs->super->s_log_groups_per_flex;
115 int i_stride, b_stride;
120 for (group = 0; group < fs->group_desc_count; group++) {
121 has_sb = ext2fs_bg_has_super(fs, group);
122 if (group == 0 || has_sb != prev_has_sb)
124 b_stride = ext2fs_block_bitmap_loc(fs, group) -
125 ext2fs_block_bitmap_loc(fs, group - 1) -
126 fs->super->s_blocks_per_group;
127 i_stride = ext2fs_inode_bitmap_loc(fs, group) -
128 ext2fs_inode_bitmap_loc(fs, group - 1) -
129 fs->super->s_blocks_per_group;
130 if (b_stride != i_stride ||
132 (flexbg_size > 1 && (group % flexbg_size == 0)))
135 /* printf("group %d has stride %d\n", group, b_stride); */
140 prev_has_sb = has_sb;
143 if (fs->group_desc_count > 12 && num < 3)
147 fs->stride = sum / num;
151 fs->super->s_raid_stride = fs->stride;
152 ext2fs_mark_super_dirty(fs);
156 printf("Using RAID stride of %d\n", fs->stride);
160 static void bigalloc_check(ext2_filsys fs, int force)
162 if (!force && ext2fs_has_feature_bigalloc(fs->super)) {
163 fprintf(stderr, "%s", _("\nResizing bigalloc file systems has "
164 "not been fully tested. Proceed at\n"
165 "your own risk! Use the force option "
166 "if you want to go ahead anyway.\n\n"));
171 static int resize2fs_setup_tdb(const char *device, char *undo_file,
174 errcode_t retval = ENOMEM;
175 const char *tdb_dir = NULL;
176 char *tdb_file = NULL;
177 char *dev_name, *tmp_name;
179 /* (re)open a specific undo file */
180 if (undo_file && undo_file[0] != 0) {
181 retval = set_undo_io_backing_manager(*io_ptr);
184 *io_ptr = undo_io_manager;
185 retval = set_undo_io_backup_file(undo_file);
188 printf(_("Overwriting existing filesystem; this can be undone "
189 "using the command:\n"
190 " e2undo %s %s\n\n"),
196 * Configuration via a conf file would be
199 tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
201 tdb_dir = "/var/lib/e2fsprogs";
203 if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
204 access(tdb_dir, W_OK))
207 tmp_name = strdup(device);
210 dev_name = basename(tmp_name);
211 tdb_file = malloc(strlen(tdb_dir) + 11 + strlen(dev_name) + 7 + 1);
216 sprintf(tdb_file, "%s/resize2fs-%s.e2undo", tdb_dir, dev_name);
219 if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
221 com_err(program_name, retval,
222 _("while trying to delete %s"), tdb_file);
226 retval = set_undo_io_backing_manager(*io_ptr);
229 *io_ptr = undo_io_manager;
230 retval = set_undo_io_backup_file(tdb_file);
233 printf(_("Overwriting existing filesystem; this can be undone "
234 "using the command:\n"
235 " e2undo %s %s\n\n"), tdb_file, device);
242 com_err(program_name, retval, "%s",
243 _("while trying to setup undo file\n"));
247 int main (int argc, char ** argv)
256 int force_min_size = 0;
257 int print_min_size = 0;
259 int open_flags = O_RDWR;
260 blk64_t new_size = 0;
261 blk64_t max_size = 0;
262 blk64_t min_size = 0;
264 char *new_size_str = 0;
266 ext2fs_struct_stat st_buf;
268 unsigned int sys_page_size = 4096;
269 unsigned int blocksize;
271 int len, mount_flags;
272 char *mtpt, *undo_file = NULL;
273 dgrp_t new_group_desc_count;
274 unsigned long new_desc_blocks;
277 setlocale(LC_MESSAGES, "");
278 setlocale(LC_CTYPE, "");
279 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
280 textdomain(NLS_CAT_NAME);
281 set_com_err_gettext(gettext);
284 add_error_table(&et_ext2_error_table);
286 fprintf (stderr, "resize2fs %s (%s)\n",
287 E2FSPROGS_VERSION, E2FSPROGS_DATE);
289 program_name = *argv;
293 while ((c = getopt(argc, argv, "d:fFhMPpS:bsz:")) != EOF) {
311 flags |= atoi(optarg);
314 flags |= RESIZE_PERCENT_COMPLETE;
317 use_stride = atoi(optarg);
320 flags |= RESIZE_ENABLE_64BIT;
323 flags |= RESIZE_DISABLE_64BIT;
335 device_name = argv[optind++];
337 new_size_str = argv[optind++];
341 io_options = strchr(device_name, '?');
346 * Figure out whether or not the device is mounted, and if it is
347 * where it is mounted.
355 retval = ext2fs_check_mount_point(device_name, &mount_flags,
358 com_err("ext2fs_check_mount_point", retval,
359 _("while determining whether %s is mounted."),
363 if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
370 open_flags = O_RDONLY;
372 fd = ext2fs_open_file(device_name, open_flags, 0);
374 com_err("open", errno, _("while opening %s"),
379 ret = ext2fs_fstat(fd, &st_buf);
381 com_err("open", errno,
382 _("while getting stat information for %s"),
388 retval = ext2fs_sync_device(fd, 1);
390 com_err(argv[0], retval,
391 _("while trying to flush %s"),
397 if (!S_ISREG(st_buf.st_mode )) {
402 #ifdef CONFIG_TESTIO_DEBUG
403 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
404 io_ptr = test_io_manager;
405 test_io_backing_manager = unix_io_manager;
408 io_ptr = unix_io_manager;
410 if (!(mount_flags & EXT2_MF_MOUNTED) && !print_min_size)
411 io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
413 io_flags |= EXT2_FLAG_64BITS | EXT2_FLAG_THREADS;
415 retval = resize2fs_setup_tdb(device_name, undo_file, &io_ptr);
419 retval = ext2fs_open2(device_name, io_options, io_flags,
422 com_err(program_name, retval, _("while trying to open %s"),
424 printf("%s", _("Couldn't find valid filesystem superblock.\n"));
427 fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
430 * Before acting on an unmounted filesystem, make sure it's ok,
431 * unless the user is forcing it.
433 * We do ERROR and VALID checks even if we're only printing the
434 * minimum size, because traversal of a badly damaged filesystem
435 * can cause issues as well. We don't require it to be fscked after
436 * the last mount time in this case, though, as this is a bit less
439 if (!force && !(mount_flags & EXT2_MF_MOUNTED)) {
442 if (fs->super->s_state & EXT2_ERROR_FS)
445 if ((fs->super->s_state & EXT2_VALID_FS) == 0)
448 if ((fs->super->s_lastcheck < fs->super->s_mtime) &&
452 if ((ext2fs_free_blocks_count(fs->super) >
453 ext2fs_blocks_count(fs->super)) ||
454 (fs->super->s_free_inodes_count > fs->super->s_inodes_count))
457 if ((fs->super->s_last_orphan != 0) ||
458 ext2fs_has_feature_journal_needs_recovery(fs->super))
463 _("Please run 'e2fsck -f %s' first.\n\n"),
470 * Check for compatibility with the feature sets. We need to
471 * be more stringent than ext2fs_open().
473 if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
474 com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
475 "(%s)", device_name);
479 min_size = calculate_minimum_resize_size(fs, flags);
481 if (print_min_size) {
482 printf(_("Estimated minimum size of the filesystem: %llu\n"),
483 (unsigned long long) min_size);
485 (void) ext2fs_close_free(&fs);
486 remove_error_table(&et_ext2_error_table);
490 /* Determine the system page size if possible */
492 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
493 #define _SC_PAGESIZE _SC_PAGE_SIZE
496 sysval = sysconf(_SC_PAGESIZE);
498 sys_page_size = sysval;
499 #endif /* _SC_PAGESIZE */
500 #endif /* HAVE_SYSCONF */
503 * Get the size of the containing partition, and use this for
504 * defaults and for making sure the new filesystem doesn't
505 * exceed the partition size.
507 blocksize = fs->blocksize;
508 retval = ext2fs_get_device_size2(device_name, blocksize,
511 com_err(program_name, retval, "%s",
512 _("while trying to determine filesystem size"));
517 else if (new_size_str) {
518 new_size = parse_num_blocks2(new_size_str,
519 fs->super->s_log_block_size);
521 com_err(program_name, 0,
522 _("Invalid new size: %s\n"), new_size_str);
527 /* Round down to an even multiple of a pagesize */
528 if (sys_page_size > blocksize)
529 new_size &= ~((blk64_t)((sys_page_size / blocksize)-1));
531 /* If changing 64bit, don't change the filesystem size. */
532 if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
533 new_size = ext2fs_blocks_count(fs->super);
535 if (!ext2fs_has_feature_64bit(fs->super)) {
536 /* Take 16T down to 2^32-1 blocks */
537 if (new_size == (1ULL << 32))
539 else if (new_size > (1ULL << 32)) {
540 com_err(program_name, 0, "%s",
541 _("New size too large to be "
542 "expressed in 32 bits\n"));
547 /* If using cluster allocations, trim down to a cluster boundary */
548 if (ext2fs_has_feature_bigalloc(fs->super)) {
549 new_size &= ~((blk64_t)(1ULL << fs->cluster_ratio_bits) - 1);
552 new_group_desc_count = ext2fs_div64_ceil(new_size -
553 fs->super->s_first_data_block,
554 EXT2_BLOCKS_PER_GROUP(fs->super));
555 new_desc_blocks = ext2fs_div_ceil(new_group_desc_count,
556 EXT2_DESC_PER_BLOCK(fs->super));
557 if ((new_desc_blocks + fs->super->s_first_data_block) >
558 EXT2_BLOCKS_PER_GROUP(fs->super)) {
559 com_err(program_name, 0,
560 _("New size results in too many block group "
565 if (!force && new_size < min_size) {
566 com_err(program_name, 0,
567 _("New size smaller than minimum (%llu)\n"),
568 (unsigned long long) min_size);
571 if (use_stride >= 0) {
572 if (use_stride >= (int) fs->super->s_blocks_per_group) {
573 com_err(program_name, 0, "%s",
574 _("Invalid stride length"));
577 fs->stride = fs->super->s_raid_stride = use_stride;
578 ext2fs_mark_super_dirty(fs);
580 determine_fs_stride(fs);
583 * If we are resizing a plain file, and it's not big enough,
584 * automatically extend it in a sparse fashion by writing the
585 * last requested block.
587 new_file_size = ((__u64) new_size) * blocksize;
588 if ((__u64) new_file_size >
589 (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
591 if ((new_file_size > st_buf.st_size) &&
593 if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
594 (write(fd, "0", 1) == 1))
597 if (!force && (new_size > max_size)) {
598 fprintf(stderr, _("The containing partition (or device)"
599 " is only %llu (%dk) blocks.\nYou requested a new size"
600 " of %llu blocks.\n\n"), (unsigned long long) max_size,
601 blocksize / 1024, (unsigned long long) new_size);
604 if ((flags & RESIZE_DISABLE_64BIT) && (flags & RESIZE_ENABLE_64BIT)) {
605 fprintf(stderr, _("Cannot set and unset 64bit feature.\n"));
607 } else if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
608 if (new_size >= (1ULL << 32)) {
609 fprintf(stderr, _("Cannot change the 64bit feature "
610 "on a filesystem that is larger than "
614 if (mount_flags & EXT2_MF_MOUNTED) {
615 fprintf(stderr, _("Cannot change the 64bit feature "
616 "while the filesystem is mounted.\n"));
619 if (flags & RESIZE_ENABLE_64BIT &&
620 !ext2fs_has_feature_extents(fs->super)) {
621 fprintf(stderr, _("Please enable the extents feature "
622 "with tune2fs before enabling the 64bit "
627 adjust_new_size(fs, &new_size);
628 if (new_size == ext2fs_blocks_count(fs->super)) {
629 fprintf(stderr, _("The filesystem is already "
630 "%llu (%dk) blocks long. "
631 "Nothing to do!\n\n"),
632 (unsigned long long) new_size,
637 if ((flags & RESIZE_ENABLE_64BIT) &&
638 ext2fs_has_feature_64bit(fs->super)) {
639 fprintf(stderr, _("The filesystem is already 64-bit.\n"));
642 if ((flags & RESIZE_DISABLE_64BIT) &&
643 !ext2fs_has_feature_64bit(fs->super)) {
644 fprintf(stderr, _("The filesystem is already 32-bit.\n"));
647 if (new_size < ext2fs_blocks_count(fs->super) &&
648 ext2fs_has_feature_stable_inodes(fs->super)) {
649 fprintf(stderr, _("Cannot shrink this filesystem "
650 "because it has the stable_inodes feature flag.\n"));
653 if (mount_flags & EXT2_MF_MOUNTED) {
654 retval = online_resize_fs(fs, mtpt, &new_size, flags);
656 bigalloc_check(fs, force);
657 if (flags & RESIZE_ENABLE_64BIT)
658 printf(_("Converting the filesystem to 64-bit.\n"));
659 else if (flags & RESIZE_DISABLE_64BIT)
660 printf(_("Converting the filesystem to 32-bit.\n"));
662 printf(_("Resizing the filesystem on "
663 "%s to %llu (%dk) blocks.\n"),
664 device_name, (unsigned long long) new_size,
666 retval = resize_fs(fs, &new_size, flags,
667 ((flags & RESIZE_PERCENT_COMPLETE) ?
668 resize_progress_func : 0));
672 com_err(program_name, retval, _("while trying to resize %s"),
675 _("Please run 'e2fsck -fy %s' to fix the filesystem\n"
676 "after the aborted resize operation.\n"),
680 printf(_("The filesystem on %s is now %llu (%dk) blocks long.\n\n"),
681 device_name, (unsigned long long) new_size, blocksize / 1024);
683 if ((st_buf.st_size > new_file_size) &&
685 #ifdef HAVE_FTRUNCATE64
686 retval = ftruncate64(fd, new_file_size);
689 /* Only truncate if new_file_size doesn't overflow off_t */
690 if (((off_t) new_file_size) == new_file_size)
691 retval = ftruncate(fd, (off_t) new_file_size);
694 com_err(program_name, retval,
695 _("while trying to truncate %s"),
700 remove_error_table(&et_ext2_error_table);
703 (void) ext2fs_close_free(&fs);
704 remove_error_table(&et_ext2_error_table);