1 /*
2 * main.c --- ext2 resizer main program
3 *
4 * Copyright (C) 1997, 1998 by Theodore Ts'o and
5 * PowerQuest, Inc.
6 *
7 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
8 *
9 * %Begin-Header%
10 * This file may be redistributed under the terms of the GNU Public
11 * License.
12 * %End-Header%
13 */
14
15 #ifndef _LARGEFILE_SOURCE
16 #define _LARGEFILE_SOURCE
17 #endif
18 #ifndef _LARGEFILE64_SOURCE
19 #define _LARGEFILE64_SOURCE
20 #endif
21
22 #include "config.h"
23 #ifdef HAVE_GETOPT_H
24 #include <getopt.h>
25 #else
26 extern char *optarg;
27 extern int optind;
28 #endif
29 #include <unistd.h>
30 #ifdef HAVE_STDLIB_H
31 #include <stdlib.h>
32 #endif
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <fcntl.h>
36 #include <libgen.h>
37
38 #include "e2p/e2p.h"
39
40 #include "resize2fs.h"
41
42 #include "../version.h"
43
44 char *program_name;
45 static char *device_name, *io_options;
46
usage(char * prog)47 static void usage (char *prog)
48 {
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);
53
54 exit (1);
55 }
56
resize_progress_func(ext2_resize_t rfs,int pass,unsigned long cur,unsigned long max)57 static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
58 unsigned long cur, unsigned long max)
59 {
60 ext2_sim_progmeter progress;
61 const char *label;
62 errcode_t retval;
63
64 progress = (ext2_sim_progmeter) rfs->prog_data;
65 if (max == 0)
66 return 0;
67 if (cur == 0) {
68 if (progress)
69 ext2fs_progress_close(progress);
70 progress = 0;
71 switch (pass) {
72 case E2_RSZ_EXTEND_ITABLE_PASS:
73 label = _("Extending the inode table");
74 break;
75 case E2_RSZ_BLOCK_RELOC_PASS:
76 label = _("Relocating blocks");
77 break;
78 case E2_RSZ_INODE_SCAN_PASS:
79 label = _("Scanning inode table");
80 break;
81 case E2_RSZ_INODE_REF_UPD_PASS:
82 label = _("Updating inode references");
83 break;
84 case E2_RSZ_MOVE_ITABLE_PASS:
85 label = _("Moving inode table");
86 break;
87 default:
88 label = _("Unknown pass?!?");
89 break;
90 }
91 printf(_("Begin pass %d (max = %lu)\n"), pass, max);
92 retval = ext2fs_progress_init(&progress, label, 30,
93 40, max, 0);
94 if (retval)
95 progress = 0;
96 rfs->prog_data = (void *) progress;
97 }
98 if (progress)
99 ext2fs_progress_update(progress, cur);
100 if (cur >= max) {
101 if (progress)
102 ext2fs_progress_close(progress);
103 progress = 0;
104 rfs->prog_data = 0;
105 }
106 return 0;
107 }
108
determine_fs_stride(ext2_filsys fs)109 static void determine_fs_stride(ext2_filsys fs)
110 {
111 unsigned int group;
112 unsigned long long sum;
113 unsigned int has_sb, prev_has_sb = 0, num;
114 int i_stride, b_stride;
115 int flexbg_size = 1 << fs->super->s_log_groups_per_flex;
116
117 if (fs->stride)
118 return;
119 num = 0; sum = 0;
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)
123 goto next;
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 ||
131 b_stride < 0 ||
132 (flexbg_size > 1 && (group % flexbg_size == 0)))
133 goto next;
134
135 /* printf("group %d has stride %d\n", group, b_stride); */
136 sum += b_stride;
137 num++;
138
139 next:
140 prev_has_sb = has_sb;
141 }
142
143 if (fs->group_desc_count > 12 && num < 3)
144 sum = 0;
145
146 if (num)
147 fs->stride = sum / num;
148 else
149 fs->stride = 0;
150
151 fs->super->s_raid_stride = fs->stride;
152 ext2fs_mark_super_dirty(fs);
153
154 #if 0
155 if (fs->stride)
156 printf("Using RAID stride of %d\n", fs->stride);
157 #endif
158 }
159
bigalloc_check(ext2_filsys fs,int force)160 static void bigalloc_check(ext2_filsys fs, int force)
161 {
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"));
167 exit(1);
168 }
169 }
170
resize2fs_setup_tdb(const char * device,char * undo_file,io_manager * io_ptr)171 static int resize2fs_setup_tdb(const char *device, char *undo_file,
172 io_manager *io_ptr)
173 {
174 errcode_t retval = ENOMEM;
175 const char *tdb_dir = NULL;
176 char *tdb_file = NULL;
177 char *dev_name, *tmp_name;
178
179 /* (re)open a specific undo file */
180 if (undo_file && undo_file[0] != 0) {
181 retval = set_undo_io_backing_manager(*io_ptr);
182 if (retval)
183 goto err;
184 *io_ptr = undo_io_manager;
185 retval = set_undo_io_backup_file(undo_file);
186 if (retval)
187 goto err;
188 printf(_("Overwriting existing filesystem; this can be undone "
189 "using the command:\n"
190 " e2undo %s %s\n\n"),
191 undo_file, device);
192 return retval;
193 }
194
195 /*
196 * Configuration via a conf file would be
197 * nice
198 */
199 tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
200 if (!tdb_dir)
201 tdb_dir = "/var/lib/e2fsprogs";
202
203 if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
204 access(tdb_dir, W_OK))
205 return 0;
206
207 tmp_name = strdup(device);
208 if (!tmp_name)
209 goto errout;
210 dev_name = basename(tmp_name);
211 tdb_file = malloc(strlen(tdb_dir) + 11 + strlen(dev_name) + 7 + 1);
212 if (!tdb_file) {
213 free(tmp_name);
214 goto errout;
215 }
216 sprintf(tdb_file, "%s/resize2fs-%s.e2undo", tdb_dir, dev_name);
217 free(tmp_name);
218
219 if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
220 retval = errno;
221 com_err(program_name, retval,
222 _("while trying to delete %s"), tdb_file);
223 goto errout;
224 }
225
226 retval = set_undo_io_backing_manager(*io_ptr);
227 if (retval)
228 goto errout;
229 *io_ptr = undo_io_manager;
230 retval = set_undo_io_backup_file(tdb_file);
231 if (retval)
232 goto errout;
233 printf(_("Overwriting existing filesystem; this can be undone "
234 "using the command:\n"
235 " e2undo %s %s\n\n"), tdb_file, device);
236
237 free(tdb_file);
238 return 0;
239 errout:
240 free(tdb_file);
241 err:
242 com_err(program_name, retval, "%s",
243 _("while trying to setup undo file\n"));
244 return retval;
245 }
246
main(int argc,char ** argv)247 int main (int argc, char ** argv)
248 {
249 errcode_t retval;
250 ext2_filsys fs;
251 int c;
252 int flags = 0;
253 int flush = 0;
254 int force = 0;
255 int io_flags = 0;
256 int force_min_size = 0;
257 int print_min_size = 0;
258 int fd, ret;
259 blk64_t new_size = 0;
260 blk64_t max_size = 0;
261 blk64_t min_size = 0;
262 io_manager io_ptr;
263 char *new_size_str = 0;
264 int use_stride = -1;
265 ext2fs_struct_stat st_buf;
266 __s64 new_file_size;
267 unsigned int sys_page_size = 4096;
268 unsigned int blocksize;
269 long sysval;
270 int len, mount_flags;
271 char *mtpt, *undo_file = NULL;
272
273 #ifdef ENABLE_NLS
274 setlocale(LC_MESSAGES, "");
275 setlocale(LC_CTYPE, "");
276 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
277 textdomain(NLS_CAT_NAME);
278 set_com_err_gettext(gettext);
279 #endif
280
281 add_error_table(&et_ext2_error_table);
282
283 fprintf (stderr, "resize2fs %s (%s)\n",
284 E2FSPROGS_VERSION, E2FSPROGS_DATE);
285 if (argc && *argv)
286 program_name = *argv;
287
288 while ((c = getopt(argc, argv, "d:fFhMPpS:bsz:")) != EOF) {
289 switch (c) {
290 case 'h':
291 usage(program_name);
292 break;
293 case 'f':
294 force = 1;
295 break;
296 case 'F':
297 flush = 1;
298 break;
299 case 'M':
300 force_min_size = 1;
301 break;
302 case 'P':
303 print_min_size = 1;
304 break;
305 case 'd':
306 flags |= atoi(optarg);
307 break;
308 case 'p':
309 flags |= RESIZE_PERCENT_COMPLETE;
310 break;
311 case 'S':
312 use_stride = atoi(optarg);
313 break;
314 case 'b':
315 flags |= RESIZE_ENABLE_64BIT;
316 break;
317 case 's':
318 flags |= RESIZE_DISABLE_64BIT;
319 break;
320 case 'z':
321 undo_file = optarg;
322 break;
323 default:
324 usage(program_name);
325 }
326 }
327 if (optind == argc)
328 usage(program_name);
329
330 device_name = argv[optind++];
331 if (optind < argc)
332 new_size_str = argv[optind++];
333 if (optind < argc)
334 usage(program_name);
335
336 io_options = strchr(device_name, '?');
337 if (io_options)
338 *io_options++ = 0;
339
340 /*
341 * Figure out whether or not the device is mounted, and if it is
342 * where it is mounted.
343 */
344 len=80;
345 while (1) {
346 mtpt = malloc(len);
347 if (!mtpt)
348 return ENOMEM;
349 mtpt[len-1] = 0;
350 retval = ext2fs_check_mount_point(device_name, &mount_flags,
351 mtpt, len);
352 if (retval) {
353 com_err("ext2fs_check_mount_point", retval,
354 _("while determining whether %s is mounted."),
355 device_name);
356 exit(1);
357 }
358 if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
359 break;
360 free(mtpt);
361 len = 2 * len;
362 }
363
364 fd = ext2fs_open_file(device_name, O_RDWR, 0);
365 if (fd < 0) {
366 com_err("open", errno, _("while opening %s"),
367 device_name);
368 exit(1);
369 }
370
371 ret = ext2fs_fstat(fd, &st_buf);
372 if (ret < 0) {
373 com_err("open", errno,
374 _("while getting stat information for %s"),
375 device_name);
376 exit(1);
377 }
378
379 if (flush) {
380 retval = ext2fs_sync_device(fd, 1);
381 if (retval) {
382 com_err(argv[0], retval,
383 _("while trying to flush %s"),
384 device_name);
385 exit(1);
386 }
387 }
388
389 if (!S_ISREG(st_buf.st_mode )) {
390 close(fd);
391 fd = -1;
392 }
393
394 #ifdef CONFIG_TESTIO_DEBUG
395 if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
396 io_ptr = test_io_manager;
397 test_io_backing_manager = unix_io_manager;
398 } else
399 #endif
400 io_ptr = unix_io_manager;
401
402 if (!(mount_flags & EXT2_MF_MOUNTED))
403 io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
404
405 io_flags |= EXT2_FLAG_64BITS;
406 if (undo_file) {
407 retval = resize2fs_setup_tdb(device_name, undo_file, &io_ptr);
408 if (retval)
409 exit(1);
410 }
411 retval = ext2fs_open2(device_name, io_options, io_flags,
412 0, 0, io_ptr, &fs);
413 if (retval) {
414 com_err(program_name, retval, _("while trying to open %s"),
415 device_name);
416 printf("%s", _("Couldn't find valid filesystem superblock.\n"));
417 exit (1);
418 }
419 fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
420
421 /*
422 * Before acting on an unmounted filesystem, make sure it's ok,
423 * unless the user is forcing it.
424 *
425 * We do ERROR and VALID checks even if we're only printing the
426 * minimum size, because traversal of a badly damaged filesystem
427 * can cause issues as well. We don't require it to be fscked after
428 * the last mount time in this case, though, as this is a bit less
429 * risky.
430 */
431 if (!force && !(mount_flags & EXT2_MF_MOUNTED)) {
432 int checkit = 0;
433
434 if (fs->super->s_state & EXT2_ERROR_FS)
435 checkit = 1;
436
437 if ((fs->super->s_state & EXT2_VALID_FS) == 0)
438 checkit = 1;
439
440 if ((fs->super->s_lastcheck < fs->super->s_mtime) &&
441 !print_min_size)
442 checkit = 1;
443
444 if ((ext2fs_free_blocks_count(fs->super) >
445 ext2fs_blocks_count(fs->super)) ||
446 (fs->super->s_free_inodes_count > fs->super->s_inodes_count))
447 checkit = 1;
448
449 if (checkit) {
450 fprintf(stderr,
451 _("Please run 'e2fsck -f %s' first.\n\n"),
452 device_name);
453 exit(1);
454 }
455 }
456
457 /*
458 * Check for compatibility with the feature sets. We need to
459 * be more stringent than ext2fs_open().
460 */
461 if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
462 com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
463 "(%s)", device_name);
464 exit(1);
465 }
466
467 min_size = calculate_minimum_resize_size(fs, flags);
468
469 if (print_min_size) {
470 printf(_("Estimated minimum size of the filesystem: %llu\n"),
471 min_size);
472 exit(0);
473 }
474
475 /* Determine the system page size if possible */
476 #ifdef HAVE_SYSCONF
477 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
478 #define _SC_PAGESIZE _SC_PAGE_SIZE
479 #endif
480 #ifdef _SC_PAGESIZE
481 sysval = sysconf(_SC_PAGESIZE);
482 if (sysval > 0)
483 sys_page_size = sysval;
484 #endif /* _SC_PAGESIZE */
485 #endif /* HAVE_SYSCONF */
486
487 /*
488 * Get the size of the containing partition, and use this for
489 * defaults and for making sure the new filesystem doesn't
490 * exceed the partition size.
491 */
492 blocksize = fs->blocksize;
493 retval = ext2fs_get_device_size2(device_name, blocksize,
494 &max_size);
495 if (retval) {
496 com_err(program_name, retval, "%s",
497 _("while trying to determine filesystem size"));
498 exit(1);
499 }
500 if (force_min_size)
501 new_size = min_size;
502 else if (new_size_str) {
503 new_size = parse_num_blocks2(new_size_str,
504 fs->super->s_log_block_size);
505 if (new_size == 0) {
506 com_err(program_name, 0,
507 _("Invalid new size: %s\n"), new_size_str);
508 exit(1);
509 }
510 } else {
511 new_size = max_size;
512 /* Round down to an even multiple of a pagesize */
513 if (sys_page_size > blocksize)
514 new_size &= ~((blk64_t)((sys_page_size / blocksize)-1));
515 }
516 /* If changing 64bit, don't change the filesystem size. */
517 if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
518 new_size = ext2fs_blocks_count(fs->super);
519 }
520 if (!ext2fs_has_feature_64bit(fs->super)) {
521 /* Take 16T down to 2^32-1 blocks */
522 if (new_size == (1ULL << 32))
523 new_size--;
524 else if (new_size > (1ULL << 32)) {
525 com_err(program_name, 0, "%s",
526 _("New size too large to be "
527 "expressed in 32 bits\n"));
528 exit(1);
529 }
530 }
531
532 if (!force && new_size < min_size) {
533 com_err(program_name, 0,
534 _("New size smaller than minimum (%llu)\n"), min_size);
535 exit(1);
536 }
537 if (use_stride >= 0) {
538 if (use_stride >= (int) fs->super->s_blocks_per_group) {
539 com_err(program_name, 0, "%s",
540 _("Invalid stride length"));
541 exit(1);
542 }
543 fs->stride = fs->super->s_raid_stride = use_stride;
544 ext2fs_mark_super_dirty(fs);
545 } else
546 determine_fs_stride(fs);
547
548 /*
549 * If we are resizing a plain file, and it's not big enough,
550 * automatically extend it in a sparse fashion by writing the
551 * last requested block.
552 */
553 new_file_size = ((__u64) new_size) * blocksize;
554 if ((__u64) new_file_size >
555 (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
556 fd = -1;
557 if ((new_file_size > st_buf.st_size) &&
558 (fd > 0)) {
559 if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
560 (write(fd, "0", 1) == 1))
561 max_size = new_size;
562 }
563 if (!force && (new_size > max_size)) {
564 fprintf(stderr, _("The containing partition (or device)"
565 " is only %llu (%dk) blocks.\nYou requested a new size"
566 " of %llu blocks.\n\n"), max_size,
567 blocksize / 1024, new_size);
568 exit(1);
569 }
570 if ((flags & RESIZE_DISABLE_64BIT) && (flags & RESIZE_ENABLE_64BIT)) {
571 fprintf(stderr, _("Cannot set and unset 64bit feature.\n"));
572 exit(1);
573 } else if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
574 if (new_size >= (1ULL << 32)) {
575 fprintf(stderr, _("Cannot change the 64bit feature "
576 "on a filesystem that is larger than "
577 "2^32 blocks.\n"));
578 exit(1);
579 }
580 if (mount_flags & EXT2_MF_MOUNTED) {
581 fprintf(stderr, _("Cannot change the 64bit feature "
582 "while the filesystem is mounted.\n"));
583 exit(1);
584 }
585 if (flags & RESIZE_ENABLE_64BIT &&
586 !ext2fs_has_feature_extents(fs->super)) {
587 fprintf(stderr, _("Please enable the extents feature "
588 "with tune2fs before enabling the 64bit "
589 "feature.\n"));
590 exit(1);
591 }
592 } else if (new_size == ext2fs_blocks_count(fs->super)) {
593 fprintf(stderr, _("The filesystem is already %llu (%dk) "
594 "blocks long. Nothing to do!\n\n"), new_size,
595 blocksize / 1024);
596 exit(0);
597 }
598 if ((flags & RESIZE_ENABLE_64BIT) &&
599 ext2fs_has_feature_64bit(fs->super)) {
600 fprintf(stderr, _("The filesystem is already 64-bit.\n"));
601 exit(0);
602 }
603 if ((flags & RESIZE_DISABLE_64BIT) &&
604 !ext2fs_has_feature_64bit(fs->super)) {
605 fprintf(stderr, _("The filesystem is already 32-bit.\n"));
606 exit(0);
607 }
608 if (mount_flags & EXT2_MF_MOUNTED) {
609 retval = online_resize_fs(fs, mtpt, &new_size, flags);
610 } else {
611 bigalloc_check(fs, force);
612 if (flags & RESIZE_ENABLE_64BIT)
613 printf(_("Converting the filesystem to 64-bit.\n"));
614 else if (flags & RESIZE_DISABLE_64BIT)
615 printf(_("Converting the filesystem to 32-bit.\n"));
616 else
617 printf(_("Resizing the filesystem on "
618 "%s to %llu (%dk) blocks.\n"),
619 device_name, new_size, blocksize / 1024);
620 retval = resize_fs(fs, &new_size, flags,
621 ((flags & RESIZE_PERCENT_COMPLETE) ?
622 resize_progress_func : 0));
623 }
624 free(mtpt);
625 if (retval) {
626 com_err(program_name, retval, _("while trying to resize %s"),
627 device_name);
628 fprintf(stderr,
629 _("Please run 'e2fsck -fy %s' to fix the filesystem\n"
630 "after the aborted resize operation.\n"),
631 device_name);
632 ext2fs_close_free(&fs);
633 exit(1);
634 }
635 printf(_("The filesystem on %s is now %llu (%dk) blocks long.\n\n"),
636 device_name, new_size, blocksize / 1024);
637
638 if ((st_buf.st_size > new_file_size) &&
639 (fd > 0)) {
640 #ifdef HAVE_FTRUNCATE64
641 retval = ftruncate64(fd, new_file_size);
642 #else
643 retval = 0;
644 /* Only truncate if new_file_size doesn't overflow off_t */
645 if (((off_t) new_file_size) == new_file_size)
646 retval = ftruncate(fd, (off_t) new_file_size);
647 #endif
648 if (retval)
649 com_err(program_name, retval,
650 _("while trying to truncate %s"),
651 device_name);
652 }
653 if (fd > 0)
654 close(fd);
655 remove_error_table(&et_ext2_error_table);
656 return (0);
657 }
658