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 #define _LARGEFILE_SOURCE
16 #define _LARGEFILE64_SOURCE
29 #include <sys/types.h>
35 #include "resize2fs.h"
37 #include "../version.h"
40 static char *device_name, *io_options;
42 static void usage (char *prog)
44 fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-P] "
45 "[-p] device [new_size]\n\n"), prog);
50 static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
51 unsigned long cur, unsigned long max)
53 ext2_sim_progmeter progress;
57 progress = (ext2_sim_progmeter) rfs->prog_data;
62 ext2fs_progress_close(progress);
65 case E2_RSZ_EXTEND_ITABLE_PASS:
66 label = _("Extending the inode table");
68 case E2_RSZ_BLOCK_RELOC_PASS:
69 label = _("Relocating blocks");
71 case E2_RSZ_INODE_SCAN_PASS:
72 label = _("Scanning inode table");
74 case E2_RSZ_INODE_REF_UPD_PASS:
75 label = _("Updating inode references");
77 case E2_RSZ_MOVE_ITABLE_PASS:
78 label = _("Moving inode table");
81 label = _("Unknown pass?!?");
84 printf(_("Begin pass %d (max = %lu)\n"), pass, max);
85 retval = ext2fs_progress_init(&progress, label, 30,
89 rfs->prog_data = (void *) progress;
92 ext2fs_progress_update(progress, cur);
95 ext2fs_progress_close(progress);
102 static void determine_fs_stride(ext2_filsys fs)
105 unsigned long long sum;
106 unsigned int has_sb, prev_has_sb = 0, num;
107 int i_stride, b_stride;
112 for (group = 0; group < fs->group_desc_count; group++) {
113 has_sb = ext2fs_bg_has_super(fs, group);
114 if (group == 0 || has_sb != prev_has_sb)
116 b_stride = ext2fs_block_bitmap_loc(fs, group) -
117 ext2fs_block_bitmap_loc(fs, group - 1) -
118 fs->super->s_blocks_per_group;
119 i_stride = ext2fs_inode_bitmap_loc(fs, group) -
120 ext2fs_inode_bitmap_loc(fs, group - 1) -
121 fs->super->s_blocks_per_group;
122 if (b_stride != i_stride ||
126 /* printf("group %d has stride %d\n", group, b_stride); */
131 prev_has_sb = has_sb;
134 if (fs->group_desc_count > 12 && num < 3)
138 fs->stride = sum / num;
142 fs->super->s_raid_stride = fs->stride;
143 ext2fs_mark_super_dirty(fs);
147 printf("Using RAID stride of %d\n", fs->stride);
151 static void bigalloc_check(ext2_filsys fs, int force)
153 if (!force && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
154 EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
155 fprintf(stderr, "%s", _("\nResizing bigalloc file systems has "
156 "not been fully tested. Proceed at\n"
157 "your own risk! Use the force option "
158 "if you want to go ahead anyway.\n\n"));
163 int main (int argc, char ** argv)
172 int force_min_size = 0;
173 int print_min_size = 0;
175 blk64_t new_size = 0;
176 blk64_t max_size = 0;
177 blk64_t min_size = 0;
179 char *new_size_str = 0;
181 ext2fs_struct_stat st_buf;
183 unsigned int sys_page_size = 4096;
185 int len, mount_flags;
189 setlocale(LC_MESSAGES, "");
190 setlocale(LC_CTYPE, "");
191 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
192 textdomain(NLS_CAT_NAME);
193 set_com_err_gettext(gettext);
196 add_error_table(&et_ext2_error_table);
198 fprintf (stderr, "resize2fs %s (%s)\n",
199 E2FSPROGS_VERSION, E2FSPROGS_DATE);
201 program_name = *argv;
203 while ((c = getopt (argc, argv, "d:fFhMPpS:")) != EOF) {
221 flags |= atoi(optarg);
224 flags |= RESIZE_PERCENT_COMPLETE;
227 use_stride = atoi(optarg);
236 device_name = argv[optind++];
238 new_size_str = argv[optind++];
242 io_options = strchr(device_name, '?');
247 * Figure out whether or not the device is mounted, and if it is
248 * where it is mounted.
256 retval = ext2fs_check_mount_point(device_name, &mount_flags,
259 com_err("ext2fs_check_mount_point", retval,
260 _("while determining whether %s is mounted."),
264 if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
270 fd = ext2fs_open_file(device_name, O_RDWR, 0);
272 com_err("open", errno, _("while opening %s"),
277 ret = ext2fs_fstat(fd, &st_buf);
279 com_err("open", errno,
280 _("while getting stat information for %s"),
286 retval = ext2fs_sync_device(fd, 1);
288 com_err(argv[0], retval,
289 _("while trying to flush %s"),
295 if (!S_ISREG(st_buf.st_mode )) {
300 #ifdef CONFIG_TESTIO_DEBUG
301 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
302 io_ptr = test_io_manager;
303 test_io_backing_manager = unix_io_manager;
306 io_ptr = unix_io_manager;
308 if (!(mount_flags & EXT2_MF_MOUNTED))
309 io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
311 io_flags |= EXT2_FLAG_64BITS;
313 retval = ext2fs_open2(device_name, io_options, io_flags,
316 com_err(program_name, retval, _("while trying to open %s"),
318 printf("%s", _("Couldn't find valid filesystem superblock.\n"));
322 if (!(mount_flags & EXT2_MF_MOUNTED)) {
323 if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
324 (fs->super->s_state & EXT2_ERROR_FS) ||
325 ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
327 _("Please run 'e2fsck -f %s' first.\n\n"),
334 * Check for compatibility with the feature sets. We need to
335 * be more stringent than ext2fs_open().
337 if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
338 com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
339 "(%s)", device_name);
343 min_size = calculate_minimum_resize_size(fs, flags);
345 if (print_min_size) {
346 printf(_("Estimated minimum size of the filesystem: %llu\n"),
351 /* Determine the system page size if possible */
353 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
354 #define _SC_PAGESIZE _SC_PAGE_SIZE
357 sysval = sysconf(_SC_PAGESIZE);
359 sys_page_size = sysval;
360 #endif /* _SC_PAGESIZE */
361 #endif /* HAVE_SYSCONF */
364 * Get the size of the containing partition, and use this for
365 * defaults and for making sure the new filesystem doesn't
366 * exceed the partition size.
368 retval = ext2fs_get_device_size2(device_name, fs->blocksize,
371 com_err(program_name, retval, "%s",
372 _("while trying to determine filesystem size"));
377 else if (new_size_str) {
378 new_size = parse_num_blocks2(new_size_str,
379 fs->super->s_log_block_size);
381 com_err(program_name, 0,
382 _("Invalid new size: %s\n"), new_size_str);
387 /* Round down to an even multiple of a pagesize */
388 if (sys_page_size > fs->blocksize)
389 new_size &= ~((sys_page_size / fs->blocksize)-1);
391 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
392 EXT4_FEATURE_INCOMPAT_64BIT)) {
393 /* Take 16T down to 2^32-1 blocks */
394 if (new_size == (1ULL << 32))
396 else if (new_size > (1ULL << 32)) {
397 com_err(program_name, 0, "%s",
398 _("New size too large to be "
399 "expressed in 32 bits\n"));
404 if (!force && new_size < min_size) {
405 com_err(program_name, 0,
406 _("New size smaller than minimum (%llu)\n"), min_size);
409 if (use_stride >= 0) {
410 if (use_stride >= (int) fs->super->s_blocks_per_group) {
411 com_err(program_name, 0, "%s",
412 _("Invalid stride length"));
415 fs->stride = fs->super->s_raid_stride = use_stride;
416 ext2fs_mark_super_dirty(fs);
418 determine_fs_stride(fs);
421 * If we are resizing a plain file, and it's not big enough,
422 * automatically extend it in a sparse fashion by writing the
423 * last requested block.
425 new_file_size = ((__u64) new_size) * fs->blocksize;
426 if ((__u64) new_file_size >
427 (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
429 if ((new_file_size > st_buf.st_size) &&
431 if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
432 (write(fd, "0", 1) == 1))
435 if (!force && (new_size > max_size)) {
436 fprintf(stderr, _("The containing partition (or device)"
437 " is only %llu (%dk) blocks.\nYou requested a new size"
438 " of %llu blocks.\n\n"), max_size,
439 fs->blocksize / 1024, new_size);
442 if (new_size == ext2fs_blocks_count(fs->super)) {
443 fprintf(stderr, _("The filesystem is already %llu blocks "
444 "long. Nothing to do!\n\n"), new_size);
447 if (mount_flags & EXT2_MF_MOUNTED) {
448 bigalloc_check(fs, force);
449 retval = online_resize_fs(fs, mtpt, &new_size, flags);
451 bigalloc_check(fs, force);
452 printf(_("Resizing the filesystem on "
453 "%s to %llu (%dk) blocks.\n"),
454 device_name, new_size, fs->blocksize / 1024);
455 retval = resize_fs(fs, &new_size, flags,
456 ((flags & RESIZE_PERCENT_COMPLETE) ?
457 resize_progress_func : 0));
461 com_err(program_name, retval, _("while trying to resize %s"),
464 _("Please run 'e2fsck -fy %s' to fix the filesystem\n"
465 "after the aborted resize operation.\n"),
467 ext2fs_close_free(&fs);
470 printf(_("The filesystem on %s is now %llu blocks long.\n\n"),
471 device_name, new_size);
473 if ((st_buf.st_size > new_file_size) &&
475 #ifdef HAVE_FTRUNCATE64
476 retval = ftruncate64(fd, new_file_size);
479 /* Only truncate if new_file_size doesn't overflow off_t */
480 if (((off_t) new_file_size) == new_file_size)
481 retval = ftruncate(fd, (off_t) new_file_size);
484 com_err(program_name, retval,
485 _("while trying to truncate %s"),
490 remove_error_table(&et_ext2_error_table);