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
28 #include <sys/types.h>
34 #include "resize2fs.h"
36 #include "../version.h"
38 char *program_name
, *device_name
, *io_options
;
40 static void usage (char *prog
)
42 fprintf (stderr
, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-P] "
43 "[-p] device [new_size]\n\n"), prog
);
48 static errcode_t
resize_progress_func(ext2_resize_t rfs
, int pass
,
49 unsigned long cur
, unsigned long max
)
51 ext2_sim_progmeter progress
;
55 progress
= (ext2_sim_progmeter
) rfs
->prog_data
;
60 ext2fs_progress_close(progress
);
63 case E2_RSZ_EXTEND_ITABLE_PASS
:
64 label
= _("Extending the inode table");
66 case E2_RSZ_BLOCK_RELOC_PASS
:
67 label
= _("Relocating blocks");
69 case E2_RSZ_INODE_SCAN_PASS
:
70 label
= _("Scanning inode table");
72 case E2_RSZ_INODE_REF_UPD_PASS
:
73 label
= _("Updating inode references");
75 case E2_RSZ_MOVE_ITABLE_PASS
:
76 label
= _("Moving inode table");
79 label
= _("Unknown pass?!?");
82 printf(_("Begin pass %d (max = %lu)\n"), pass
, max
);
83 retval
= ext2fs_progress_init(&progress
, label
, 30,
87 rfs
->prog_data
= (void *) progress
;
90 ext2fs_progress_update(progress
, cur
);
93 ext2fs_progress_close(progress
);
100 static void determine_fs_stride(ext2_filsys fs
)
103 unsigned long long sum
;
104 unsigned int has_sb
, prev_has_sb
, num
;
105 int i_stride
, b_stride
;
110 for (group
= 0; group
< fs
->group_desc_count
; group
++) {
111 has_sb
= ext2fs_bg_has_super(fs
, group
);
112 if (group
== 0 || has_sb
!= prev_has_sb
)
114 b_stride
= ext2fs_block_bitmap_loc(fs
, group
) -
115 ext2fs_block_bitmap_loc(fs
, group
- 1) -
116 fs
->super
->s_blocks_per_group
;
117 i_stride
= ext2fs_inode_bitmap_loc(fs
, group
) -
118 ext2fs_inode_bitmap_loc(fs
, group
- 1) -
119 fs
->super
->s_blocks_per_group
;
120 if (b_stride
!= i_stride
||
124 /* printf("group %d has stride %d\n", group, b_stride); */
129 prev_has_sb
= has_sb
;
132 if (fs
->group_desc_count
> 12 && num
< 3)
136 fs
->stride
= sum
/ num
;
140 fs
->super
->s_raid_stride
= fs
->stride
;
141 ext2fs_mark_super_dirty(fs
);
145 printf("Using RAID stride of %d\n", fs
->stride
);
149 int main (int argc
, char ** argv
)
158 int force_min_size
= 0;
159 int print_min_size
= 0;
165 char *new_size_str
= 0;
168 struct stat64 st_buf
;
173 unsigned int sys_page_size
= 4096;
175 int len
, mount_flags
;
179 setlocale(LC_MESSAGES
, "");
180 setlocale(LC_CTYPE
, "");
181 bindtextdomain(NLS_CAT_NAME
, LOCALEDIR
);
182 textdomain(NLS_CAT_NAME
);
185 add_error_table(&et_ext2_error_table
);
187 fprintf (stderr
, "resize2fs %s (%s)\n",
188 E2FSPROGS_VERSION
, E2FSPROGS_DATE
);
190 program_name
= *argv
;
192 while ((c
= getopt (argc
, argv
, "d:fFhMPpS:")) != EOF
) {
210 flags
|= atoi(optarg
);
213 flags
|= RESIZE_PERCENT_COMPLETE
;
216 use_stride
= atoi(optarg
);
225 device_name
= argv
[optind
++];
227 new_size_str
= argv
[optind
++];
231 io_options
= strchr(device_name
, '?');
236 * Figure out whether or not the device is mounted, and if it is
237 * where it is mounted.
245 retval
= ext2fs_check_mount_point(device_name
, &mount_flags
,
248 com_err("ext2fs_check_mount_point", retval
,
249 _("while determining whether %s is mounted."),
253 if (!(mount_flags
& EXT2_MF_MOUNTED
) || (mtpt
[len
-1] == 0))
260 fd
= open64(device_name
, O_RDWR
);
262 fd
= open(device_name
, O_RDWR
);
265 com_err("open", errno
, _("while opening %s"),
271 ret
= fstat64(fd
, &st_buf
);
273 ret
= fstat(fd
, &st_buf
);
276 com_err("open", errno
,
277 _("while getting stat information for %s"),
283 retval
= ext2fs_sync_device(fd
, 1);
285 com_err(argv
[0], retval
,
286 _("while trying to flush %s"),
292 if (!S_ISREG(st_buf
.st_mode
)) {
297 #ifdef CONFIG_TESTIO_DEBUG
298 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
299 io_ptr
= test_io_manager
;
300 test_io_backing_manager
= unix_io_manager
;
303 io_ptr
= unix_io_manager
;
305 if (!(mount_flags
& EXT2_MF_MOUNTED
))
306 io_flags
= EXT2_FLAG_RW
| EXT2_FLAG_EXCLUSIVE
;
307 retval
= ext2fs_open2(device_name
, io_options
, io_flags
,
310 com_err (program_name
, retval
, _("while trying to open %s"),
312 printf (_("Couldn't find valid filesystem superblock.\n"));
317 * Check for compatibility with the feature sets. We need to
318 * be more stringent than ext2fs_open().
320 if (fs
->super
->s_feature_compat
& ~EXT2_LIB_FEATURE_COMPAT_SUPP
) {
321 com_err(program_name
, EXT2_ET_UNSUPP_FEATURE
,
322 "(%s)", device_name
);
327 * XXXX The combination of flex_bg and !resize_inode causes
328 * major problems for resize2fs, since when the group descriptors
329 * grow in size this can potentially require multiple inode
330 * tables to be moved aside to make room, and resize2fs chokes
331 * rather badly in this scenario. It's a rare combination,
332 * except when a filesystem is expanded more than a certain
333 * size, so for now, we'll just prohibit that combination.
334 * This is something we should fix eventually, though.
336 if ((fs
->super
->s_feature_incompat
& EXT4_FEATURE_INCOMPAT_FLEX_BG
) &&
337 !(fs
->super
->s_feature_compat
& EXT2_FEATURE_COMPAT_RESIZE_INODE
)) {
338 com_err(program_name
, 0, _("%s: The combination of flex_bg "
339 "and\n\t!resize_inode features "
340 "is not supported by resize2fs.\n"),
345 min_size
= calculate_minimum_resize_size(fs
);
347 if (print_min_size
) {
348 printf(_("Estimated minimum size of the filesystem: %u\n"),
353 /* Determine the system page size if possible */
355 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
356 #define _SC_PAGESIZE _SC_PAGE_SIZE
359 sysval
= sysconf(_SC_PAGESIZE
);
361 sys_page_size
= sysval
;
362 #endif /* _SC_PAGESIZE */
363 #endif /* HAVE_SYSCONF */
366 * Get the size of the containing partition, and use this for
367 * defaults and for making sure the new filesystem doesn't
368 * exceed the partition size.
370 retval
= ext2fs_get_device_size(device_name
, fs
->blocksize
,
373 com_err(program_name
, retval
,
374 _("while trying to determine filesystem size"));
379 else if (new_size_str
) {
380 new_size
= parse_num_blocks(new_size_str
,
381 fs
->super
->s_log_block_size
);
383 com_err(program_name
, 0,
384 _("Invalid new size: %s\n"), new_size_str
);
389 /* Round down to an even multiple of a pagesize */
390 if (sys_page_size
> fs
->blocksize
)
391 new_size
&= ~((sys_page_size
/ fs
->blocksize
)-1);
394 if (!force
&& new_size
< min_size
) {
395 com_err(program_name
, 0,
396 _("New size smaller than minimum (%u)\n"), min_size
);
399 if (use_stride
>= 0) {
400 if (use_stride
>= (int) fs
->super
->s_blocks_per_group
) {
401 com_err(program_name
, 0,
402 _("Invalid stride length"));
405 fs
->stride
= fs
->super
->s_raid_stride
= use_stride
;
406 ext2fs_mark_super_dirty(fs
);
408 determine_fs_stride(fs
);
411 * If we are resizing a plain file, and it's not big enough,
412 * automatically extend it in a sparse fashion by writing the
413 * last requested block.
415 new_file_size
= ((__u64
) new_size
) * fs
->blocksize
;
416 if ((__u64
) new_file_size
>
417 (((__u64
) 1) << (sizeof(st_buf
.st_size
)*8 - 1)) - 1)
419 if ((new_file_size
> st_buf
.st_size
) &&
421 if ((ext2fs_llseek(fd
, new_file_size
-1, SEEK_SET
) >= 0) &&
422 (write(fd
, "0", 1) == 1))
425 if (!force
&& (new_size
> max_size
)) {
426 fprintf(stderr
, _("The containing partition (or device)"
427 " is only %u (%dk) blocks.\nYou requested a new size"
428 " of %u blocks.\n\n"), max_size
,
429 fs
->blocksize
/ 1024, new_size
);
432 if (new_size
== ext2fs_blocks_count(fs
->super
)) {
433 fprintf(stderr
, _("The filesystem is already %u blocks "
434 "long. Nothing to do!\n\n"), new_size
);
437 if (mount_flags
& EXT2_MF_MOUNTED
) {
438 retval
= online_resize_fs(fs
, mtpt
, &new_size
, flags
);
440 if (!force
&& ((fs
->super
->s_lastcheck
< fs
->super
->s_mtime
) ||
441 (fs
->super
->s_state
& EXT2_ERROR_FS
) ||
442 ((fs
->super
->s_state
& EXT2_VALID_FS
) == 0))) {
444 _("Please run 'e2fsck -f %s' first.\n\n"),
448 printf(_("Resizing the filesystem on "
449 "%s to %u (%dk) blocks.\n"),
450 device_name
, new_size
, fs
->blocksize
/ 1024);
451 retval
= resize_fs(fs
, &new_size
, flags
,
452 ((flags
& RESIZE_PERCENT_COMPLETE
) ?
453 resize_progress_func
: 0));
457 com_err(program_name
, retval
, _("while trying to resize %s"),
460 _("Please run 'e2fsck -fy %s' to fix the filesystem\n"
461 "after the aborted resize operation.\n"),
466 printf(_("The filesystem on %s is now %u blocks long.\n\n"),
467 device_name
, new_size
);
469 if ((st_buf
.st_size
> new_file_size
) &&
471 #ifdef HAVE_FTRUNCATE64
472 retval
= ftruncate64(fd
, new_file_size
);
475 /* Only truncate if new_file_size doesn't overflow off_t */
476 if (((off_t
) new_file_size
) == new_file_size
)
477 retval
= ftruncate(fd
, (off_t
) new_file_size
);
480 com_err(program_name
, retval
,
481 _("while trying to truncate %s"),
486 remove_error_table(&et_ext2_error_table
);