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] [-z undo_file]\n\n"),
56 static errcode_t
resize_progress_func(ext2_resize_t rfs
, int pass
,
57 unsigned long cur
, unsigned long max
)
59 ext2_sim_progmeter progress
;
63 progress
= (ext2_sim_progmeter
) rfs
->prog_data
;
68 ext2fs_progress_close(progress
);
71 case E2_RSZ_EXTEND_ITABLE_PASS
:
72 label
= _("Extending the inode table");
74 case E2_RSZ_BLOCK_RELOC_PASS
:
75 label
= _("Relocating blocks");
77 case E2_RSZ_INODE_SCAN_PASS
:
78 label
= _("Scanning inode table");
80 case E2_RSZ_INODE_REF_UPD_PASS
:
81 label
= _("Updating inode references");
83 case E2_RSZ_MOVE_ITABLE_PASS
:
84 label
= _("Moving inode table");
87 label
= _("Unknown pass?!?");
90 printf(_("Begin pass %d (max = %lu)\n"), pass
, max
);
91 retval
= ext2fs_progress_init(&progress
, label
, 30,
95 rfs
->prog_data
= (void *) progress
;
98 ext2fs_progress_update(progress
, cur
);
101 ext2fs_progress_close(progress
);
108 static void determine_fs_stride(ext2_filsys fs
)
111 unsigned long long sum
;
112 unsigned int has_sb
, prev_has_sb
= 0, num
;
113 int i_stride
, b_stride
;
114 int flexbg_size
= 1 << fs
->super
->s_log_groups_per_flex
;
119 for (group
= 0; group
< fs
->group_desc_count
; group
++) {
120 has_sb
= ext2fs_bg_has_super(fs
, group
);
121 if (group
== 0 || has_sb
!= prev_has_sb
)
123 b_stride
= ext2fs_block_bitmap_loc(fs
, group
) -
124 ext2fs_block_bitmap_loc(fs
, group
- 1) -
125 fs
->super
->s_blocks_per_group
;
126 i_stride
= ext2fs_inode_bitmap_loc(fs
, group
) -
127 ext2fs_inode_bitmap_loc(fs
, group
- 1) -
128 fs
->super
->s_blocks_per_group
;
129 if (b_stride
!= i_stride
||
131 (flexbg_size
> 1 && (group
% flexbg_size
== 0)))
134 /* printf("group %d has stride %d\n", group, b_stride); */
139 prev_has_sb
= has_sb
;
142 if (fs
->group_desc_count
> 12 && num
< 3)
146 fs
->stride
= sum
/ num
;
150 fs
->super
->s_raid_stride
= fs
->stride
;
151 ext2fs_mark_super_dirty(fs
);
155 printf("Using RAID stride of %d\n", fs
->stride
);
159 static void bigalloc_check(ext2_filsys fs
, int force
)
161 if (!force
&& ext2fs_has_feature_bigalloc(fs
->super
)) {
162 fprintf(stderr
, "%s", _("\nResizing bigalloc file systems has "
163 "not been fully tested. Proceed at\n"
164 "your own risk! Use the force option "
165 "if you want to go ahead anyway.\n\n"));
170 static int resize2fs_setup_tdb(const char *device
, char *undo_file
,
173 errcode_t retval
= ENOMEM
;
174 const char *tdb_dir
= NULL
;
175 char *tdb_file
= NULL
;
176 char *dev_name
, *tmp_name
;
178 /* (re)open a specific undo file */
179 if (undo_file
&& undo_file
[0] != 0) {
180 retval
= set_undo_io_backing_manager(*io_ptr
);
183 *io_ptr
= undo_io_manager
;
184 retval
= set_undo_io_backup_file(undo_file
);
187 printf(_("Overwriting existing filesystem; this can be undone "
188 "using the command:\n"
189 " e2undo %s %s\n\n"),
195 * Configuration via a conf file would be
198 tdb_dir
= getenv("E2FSPROGS_UNDO_DIR");
200 tdb_dir
= "/var/lib/e2fsprogs";
202 if (!strcmp(tdb_dir
, "none") || (tdb_dir
[0] == 0) ||
203 access(tdb_dir
, W_OK
))
206 tmp_name
= strdup(device
);
209 dev_name
= basename(tmp_name
);
210 tdb_file
= malloc(strlen(tdb_dir
) + 11 + strlen(dev_name
) + 7 + 1);
215 sprintf(tdb_file
, "%s/resize2fs-%s.e2undo", tdb_dir
, dev_name
);
218 if ((unlink(tdb_file
) < 0) && (errno
!= ENOENT
)) {
220 com_err(program_name
, retval
,
221 _("while trying to delete %s"), tdb_file
);
225 retval
= set_undo_io_backing_manager(*io_ptr
);
228 *io_ptr
= undo_io_manager
;
229 retval
= set_undo_io_backup_file(tdb_file
);
232 printf(_("Overwriting existing filesystem; this can be undone "
233 "using the command:\n"
234 " e2undo %s %s\n\n"), tdb_file
, device
);
241 com_err(program_name
, retval
, "%s",
242 _("while trying to setup undo file\n"));
246 int main (int argc
, char ** argv
)
255 int force_min_size
= 0;
256 int print_min_size
= 0;
258 blk64_t new_size
= 0;
259 blk64_t max_size
= 0;
260 blk64_t min_size
= 0;
262 char *new_size_str
= 0;
264 ext2fs_struct_stat st_buf
;
266 unsigned int sys_page_size
= 4096;
267 unsigned int blocksize
;
269 int len
, mount_flags
;
270 char *mtpt
, *undo_file
= NULL
;
273 setlocale(LC_MESSAGES
, "");
274 setlocale(LC_CTYPE
, "");
275 bindtextdomain(NLS_CAT_NAME
, LOCALEDIR
);
276 textdomain(NLS_CAT_NAME
);
277 set_com_err_gettext(gettext
);
280 add_error_table(&et_ext2_error_table
);
282 fprintf (stderr
, "resize2fs %s (%s)\n",
283 E2FSPROGS_VERSION
, E2FSPROGS_DATE
);
285 program_name
= *argv
;
287 while ((c
= getopt(argc
, argv
, "d:fFhMPpS:bsz:")) != EOF
) {
305 flags
|= atoi(optarg
);
308 flags
|= RESIZE_PERCENT_COMPLETE
;
311 use_stride
= atoi(optarg
);
314 flags
|= RESIZE_ENABLE_64BIT
;
317 flags
|= RESIZE_DISABLE_64BIT
;
329 device_name
= argv
[optind
++];
331 new_size_str
= argv
[optind
++];
335 io_options
= strchr(device_name
, '?');
340 * Figure out whether or not the device is mounted, and if it is
341 * where it is mounted.
349 retval
= ext2fs_check_mount_point(device_name
, &mount_flags
,
352 com_err("ext2fs_check_mount_point", retval
,
353 _("while determining whether %s is mounted."),
357 if (!(mount_flags
& EXT2_MF_MOUNTED
) || (mtpt
[len
-1] == 0))
363 fd
= ext2fs_open_file(device_name
, O_RDWR
, 0);
365 com_err("open", errno
, _("while opening %s"),
370 ret
= ext2fs_fstat(fd
, &st_buf
);
372 com_err("open", errno
,
373 _("while getting stat information for %s"),
379 retval
= ext2fs_sync_device(fd
, 1);
381 com_err(argv
[0], retval
,
382 _("while trying to flush %s"),
388 if (!S_ISREG(st_buf
.st_mode
)) {
393 #ifdef CONFIG_TESTIO_DEBUG
394 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
395 io_ptr
= test_io_manager
;
396 test_io_backing_manager
= unix_io_manager
;
399 io_ptr
= unix_io_manager
;
401 if (!(mount_flags
& EXT2_MF_MOUNTED
))
402 io_flags
= EXT2_FLAG_RW
| EXT2_FLAG_EXCLUSIVE
;
404 io_flags
|= EXT2_FLAG_64BITS
;
406 retval
= resize2fs_setup_tdb(device_name
, undo_file
, &io_ptr
);
410 retval
= ext2fs_open2(device_name
, io_options
, io_flags
,
413 com_err(program_name
, retval
, _("while trying to open %s"),
415 printf("%s", _("Couldn't find valid filesystem superblock.\n"));
418 fs
->default_bitmap_type
= EXT2FS_BMAP64_RBTREE
;
421 * Before acting on an unmounted filesystem, make sure it's ok,
422 * unless the user is forcing it.
424 * We do ERROR and VALID checks even if we're only printing the
425 * minimimum size, because traversal of a badly damaged filesystem
426 * can cause issues as well. We don't require it to be fscked after
427 * the last mount time in this case, though, as this is a bit less
430 if (!force
&& !(mount_flags
& EXT2_MF_MOUNTED
)) {
433 if (fs
->super
->s_state
& EXT2_ERROR_FS
)
436 if ((fs
->super
->s_state
& EXT2_VALID_FS
) == 0)
439 if ((fs
->super
->s_lastcheck
< fs
->super
->s_mtime
) &&
445 _("Please run 'e2fsck -f %s' first.\n\n"),
452 * Check for compatibility with the feature sets. We need to
453 * be more stringent than ext2fs_open().
455 if (fs
->super
->s_feature_compat
& ~EXT2_LIB_FEATURE_COMPAT_SUPP
) {
456 com_err(program_name
, EXT2_ET_UNSUPP_FEATURE
,
457 "(%s)", device_name
);
461 min_size
= calculate_minimum_resize_size(fs
, flags
);
463 if (print_min_size
) {
464 printf(_("Estimated minimum size of the filesystem: %llu\n"),
469 /* Determine the system page size if possible */
471 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
472 #define _SC_PAGESIZE _SC_PAGE_SIZE
475 sysval
= sysconf(_SC_PAGESIZE
);
477 sys_page_size
= sysval
;
478 #endif /* _SC_PAGESIZE */
479 #endif /* HAVE_SYSCONF */
482 * Get the size of the containing partition, and use this for
483 * defaults and for making sure the new filesystem doesn't
484 * exceed the partition size.
486 blocksize
= fs
->blocksize
;
487 retval
= ext2fs_get_device_size2(device_name
, blocksize
,
490 com_err(program_name
, retval
, "%s",
491 _("while trying to determine filesystem size"));
496 else if (new_size_str
) {
497 new_size
= parse_num_blocks2(new_size_str
,
498 fs
->super
->s_log_block_size
);
500 com_err(program_name
, 0,
501 _("Invalid new size: %s\n"), new_size_str
);
506 /* Round down to an even multiple of a pagesize */
507 if (sys_page_size
> blocksize
)
508 new_size
&= ~((blk64_t
)((sys_page_size
/ blocksize
)-1));
510 /* If changing 64bit, don't change the filesystem size. */
511 if (flags
& (RESIZE_DISABLE_64BIT
| RESIZE_ENABLE_64BIT
)) {
512 new_size
= ext2fs_blocks_count(fs
->super
);
514 if (!ext2fs_has_feature_64bit(fs
->super
)) {
515 /* Take 16T down to 2^32-1 blocks */
516 if (new_size
== (1ULL << 32))
518 else if (new_size
> (1ULL << 32)) {
519 com_err(program_name
, 0, "%s",
520 _("New size too large to be "
521 "expressed in 32 bits\n"));
526 if (!force
&& new_size
< min_size
) {
527 com_err(program_name
, 0,
528 _("New size smaller than minimum (%llu)\n"), min_size
);
531 if (use_stride
>= 0) {
532 if (use_stride
>= (int) fs
->super
->s_blocks_per_group
) {
533 com_err(program_name
, 0, "%s",
534 _("Invalid stride length"));
537 fs
->stride
= fs
->super
->s_raid_stride
= use_stride
;
538 ext2fs_mark_super_dirty(fs
);
540 determine_fs_stride(fs
);
543 * If we are resizing a plain file, and it's not big enough,
544 * automatically extend it in a sparse fashion by writing the
545 * last requested block.
547 new_file_size
= ((__u64
) new_size
) * blocksize
;
548 if ((__u64
) new_file_size
>
549 (((__u64
) 1) << (sizeof(st_buf
.st_size
)*8 - 1)) - 1)
551 if ((new_file_size
> st_buf
.st_size
) &&
553 if ((ext2fs_llseek(fd
, new_file_size
-1, SEEK_SET
) >= 0) &&
554 (write(fd
, "0", 1) == 1))
557 if (!force
&& (new_size
> max_size
)) {
558 fprintf(stderr
, _("The containing partition (or device)"
559 " is only %llu (%dk) blocks.\nYou requested a new size"
560 " of %llu blocks.\n\n"), max_size
,
561 blocksize
/ 1024, new_size
);
564 if ((flags
& RESIZE_DISABLE_64BIT
) && (flags
& RESIZE_ENABLE_64BIT
)) {
565 fprintf(stderr
, _("Cannot set and unset 64bit feature.\n"));
567 } else if (flags
& (RESIZE_DISABLE_64BIT
| RESIZE_ENABLE_64BIT
)) {
568 if (new_size
>= (1ULL << 32)) {
569 fprintf(stderr
, _("Cannot change the 64bit feature "
570 "on a filesystem that is larger than "
574 if (mount_flags
& EXT2_MF_MOUNTED
) {
575 fprintf(stderr
, _("Cannot change the 64bit feature "
576 "while the filesystem is mounted.\n"));
579 if (flags
& RESIZE_ENABLE_64BIT
&&
580 !ext2fs_has_feature_extents(fs
->super
)) {
581 fprintf(stderr
, _("Please enable the extents feature "
582 "with tune2fs before enabling the 64bit "
586 } else if (new_size
== ext2fs_blocks_count(fs
->super
)) {
587 fprintf(stderr
, _("The filesystem is already %llu (%dk) "
588 "blocks long. Nothing to do!\n\n"), new_size
,
592 if ((flags
& RESIZE_ENABLE_64BIT
) &&
593 ext2fs_has_feature_64bit(fs
->super
)) {
594 fprintf(stderr
, _("The filesystem is already 64-bit.\n"));
597 if ((flags
& RESIZE_DISABLE_64BIT
) &&
598 !ext2fs_has_feature_64bit(fs
->super
)) {
599 fprintf(stderr
, _("The filesystem is already 32-bit.\n"));
602 if (mount_flags
& EXT2_MF_MOUNTED
) {
603 bigalloc_check(fs
, force
);
604 retval
= online_resize_fs(fs
, mtpt
, &new_size
, flags
);
606 bigalloc_check(fs
, force
);
607 if (flags
& RESIZE_ENABLE_64BIT
)
608 printf(_("Converting the filesystem to 64-bit.\n"));
609 else if (flags
& RESIZE_DISABLE_64BIT
)
610 printf(_("Converting the filesystem to 32-bit.\n"));
612 printf(_("Resizing the filesystem on "
613 "%s to %llu (%dk) blocks.\n"),
614 device_name
, new_size
, blocksize
/ 1024);
615 retval
= resize_fs(fs
, &new_size
, flags
,
616 ((flags
& RESIZE_PERCENT_COMPLETE
) ?
617 resize_progress_func
: 0));
621 com_err(program_name
, retval
, _("while trying to resize %s"),
624 _("Please run 'e2fsck -fy %s' to fix the filesystem\n"
625 "after the aborted resize operation.\n"),
627 ext2fs_close_free(&fs
);
630 printf(_("The filesystem on %s is now %llu (%dk) blocks long.\n\n"),
631 device_name
, new_size
, blocksize
/ 1024);
633 if ((st_buf
.st_size
> new_file_size
) &&
635 #ifdef HAVE_FTRUNCATE64
636 retval
= ftruncate64(fd
, new_file_size
);
639 /* Only truncate if new_file_size doesn't overflow off_t */
640 if (((off_t
) new_file_size
) == new_file_size
)
641 retval
= ftruncate(fd
, (off_t
) new_file_size
);
644 com_err(program_name
, retval
,
645 _("while trying to truncate %s"),
650 remove_error_table(&et_ext2_error_table
);