source: MondoRescue/branches/3.2/mindi-busybox/e2fsprogs/old_e2fsprogs/mke2fs.c

Last change on this file was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 33.8 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * mke2fs.c - Make a ext2fs filesystem.
4 *
5 * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
6 * 2003, 2004, 2005 by Theodore Ts'o.
7 *
8 * Licensed under GPLv2, see file LICENSE in this source tree.
9 */
10
11/* Usage: mke2fs [options] device
12 *
13 * The device may be a block device or a image of one, but this isn't
14 * enforced (but it's not much fun on a character device :-).
15 */
16
17#include <stdio.h>
18#include <string.h>
19#include <fcntl.h>
20#include <ctype.h>
21#include <time.h>
22#include <getopt.h>
23#include <unistd.h>
24#include <stdlib.h>
25#include <errno.h>
26#include <mntent.h>
27#include <sys/ioctl.h>
28#include <sys/types.h>
29
30#include "e2fsbb.h"
31#include "ext2fs/ext2_fs.h"
32#include "uuid/uuid.h"
33#include "e2p/e2p.h"
34#include "ext2fs/ext2fs.h"
35#include "util.h"
36
37#define STRIDE_LENGTH 8
38
39#ifndef __sparc__
40#define ZAP_BOOTBLOCK
41#endif
42
43static const char * device_name;
44
45/* Command line options */
46static int cflag;
47static int quiet;
48static int super_only;
49static int force;
50static int noaction;
51static int journal_size;
52static int journal_flags;
53static const char *bad_blocks_filename;
54static __u32 fs_stride;
55
56static struct ext2_super_block param;
57static char *creator_os;
58static char *volume_label;
59static char *mount_dir;
60static char *journal_device = NULL;
61static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */
62
63static int sys_page_size = 4096;
64static int linux_version_code = 0;
65
66static int int_log2(int arg)
67{
68 int l = 0;
69
70 arg >>= 1;
71 while (arg) {
72 l++;
73 arg >>= 1;
74 }
75 return l;
76}
77
78static int int_log10(unsigned int arg)
79{
80 int l;
81
82 for (l = 0; arg; l++)
83 arg = arg / 10;
84 return l;
85}
86
87/*
88 * This function sets the default parameters for a filesystem
89 *
90 * The type is specified by the user. The size is the maximum size
91 * (in megabytes) for which a set of parameters applies, with a size
92 * of zero meaning that it is the default parameter for the type.
93 * Note that order is important in the table below.
94 */
95#define DEF_MAX_BLOCKSIZE -1
96static const char default_str[] = "default";
97struct mke2fs_defaults {
98 const char *type;
99 int size;
100 int blocksize;
101 int inode_ratio;
102};
103
104static const struct mke2fs_defaults settings[] = {
105 { default_str, 0, 4096, 8192 },
106 { default_str, 512, 1024, 4096 },
107 { default_str, 3, 1024, 8192 },
108 { "journal", 0, 4096, 8192 },
109 { "news", 0, 4096, 4096 },
110 { "largefile", 0, 4096, 1024 * 1024 },
111 { "largefile4", 0, 4096, 4096 * 1024 },
112 { 0, 0, 0, 0},
113};
114
115static void set_fs_defaults(const char *fs_type,
116 struct ext2_super_block *super,
117 int blocksize, int sector_size,
118 int *inode_ratio)
119{
120 int megs;
121 int ratio = 0;
122 const struct mke2fs_defaults *p;
123 int use_bsize = 1024;
124
125 megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024;
126 if (inode_ratio)
127 ratio = *inode_ratio;
128 if (!fs_type)
129 fs_type = default_str;
130 for (p = settings; p->type; p++) {
131 if ((strcmp(p->type, fs_type) != 0) &&
132 (strcmp(p->type, default_str) != 0))
133 continue;
134 if ((p->size != 0) && (megs > p->size))
135 continue;
136 if (ratio == 0)
137 *inode_ratio = p->inode_ratio < blocksize ?
138 blocksize : p->inode_ratio;
139 use_bsize = p->blocksize;
140 }
141 if (blocksize <= 0) {
142 if (use_bsize == DEF_MAX_BLOCKSIZE) {
143 use_bsize = sys_page_size;
144 if ((linux_version_code < (2*65536 + 6*256)) &&
145 (use_bsize > 4096))
146 use_bsize = 4096;
147 }
148 if (sector_size && use_bsize < sector_size)
149 use_bsize = sector_size;
150 if ((blocksize < 0) && (use_bsize < (-blocksize)))
151 use_bsize = -blocksize;
152 blocksize = use_bsize;
153 super->s_blocks_count /= blocksize / 1024;
154 }
155 super->s_log_frag_size = super->s_log_block_size =
156 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
157}
158
159
160/*
161 * Helper function for read_bb_file and test_disk
162 */
163static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
164{
165 bb_error_msg("Bad block %u out of range; ignored", blk);
166}
167
168/*
169 * Busybox stuff
170 */
171static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
172static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...)
173{
174 va_list ap;
175
176 if (retval) {
177 va_start(ap, fmt);
178 fprintf(stderr, "\nCould not ");
179 vfprintf(stderr, fmt, ap);
180 fprintf(stderr, "\n");
181 va_end(ap);
182 exit(EXIT_FAILURE);
183 }
184}
185
186static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
187static void mke2fs_verbose(const char *fmt, ...)
188{
189 va_list ap;
190
191 if (!quiet) {
192 va_start(ap, fmt);
193 vfprintf(stdout, fmt, ap);
194 fflush(stdout);
195 va_end(ap);
196 }
197}
198
199static void mke2fs_verbose_done(void)
200{
201 mke2fs_verbose("done\n");
202}
203
204static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3)));
205static void mke2fs_warning_msg(int retval, char *fmt, ... )
206{
207 va_list ap;
208
209 if (retval) {
210 va_start(ap, fmt);
211 fprintf(stderr, "\nWarning: ");
212 vfprintf(stderr, fmt, ap);
213 fprintf(stderr, "\n");
214 va_end(ap);
215 }
216}
217
218/*
219 * Reads the bad blocks list from a file
220 */
221static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
222 const char *bad_blocks_file)
223{
224 FILE *f;
225 errcode_t retval;
226
227 f = xfopen_for_read(bad_blocks_file);
228 retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
229 fclose (f);
230 mke2fs_error_msg_and_die(retval, "read bad blocks from list");
231}
232
233/*
234 * Runs the badblocks program to test the disk
235 */
236static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
237{
238 FILE *f;
239 errcode_t retval;
240 char buf[1024];
241
242 sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize,
243 quiet ? "" : "-s ", (cflag > 1) ? "-w " : "",
244 fs->device_name, fs->super->s_blocks_count);
245 mke2fs_verbose("Running command: %s\n", buf);
246 f = popen(buf, "r");
247 if (!f) {
248 bb_perror_msg_and_die("can't run '%s'", buf);
249 }
250 retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
251 pclose(f);
252 mke2fs_error_msg_and_die(retval, "read bad blocks from program");
253}
254
255static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
256{
257 dgrp_t i;
258 blk_t j;
259 unsigned must_be_good;
260 blk_t blk;
261 badblocks_iterate bb_iter;
262 errcode_t retval;
263 blk_t group_block;
264 int group;
265 int group_bad;
266
267 if (!bb_list)
268 return;
269
270 /*
271 * The primary superblock and group descriptors *must* be
272 * good; if not, abort.
273 */
274 must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
275 for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
276 if (ext2fs_badblocks_list_test(bb_list, i)) {
277 bb_error_msg_and_die(
278 "Block %d in primary superblock/group descriptor area bad\n"
279 "Blocks %d through %d must be good in order to build a filesystem\n"
280 "Aborting ...", i, fs->super->s_first_data_block, must_be_good);
281 }
282 }
283
284 /*
285 * See if any of the bad blocks are showing up in the backup
286 * superblocks and/or group descriptors. If so, issue a
287 * warning and adjust the block counts appropriately.
288 */
289 group_block = fs->super->s_first_data_block +
290 fs->super->s_blocks_per_group;
291
292 for (i = 1; i < fs->group_desc_count; i++) {
293 group_bad = 0;
294 for (j=0; j < fs->desc_blocks+1; j++) {
295 if (ext2fs_badblocks_list_test(bb_list,
296 group_block + j)) {
297 mke2fs_warning_msg(!group_bad,
298 "the backup superblock/group descriptors at block %d contain\n"
299 "bad blocks\n", group_block);
300 group_bad++;
301 group = ext2fs_group_of_blk(fs, group_block+j);
302 fs->group_desc[group].bg_free_blocks_count++;
303 fs->super->s_free_blocks_count++;
304 }
305 }
306 group_block += fs->super->s_blocks_per_group;
307 }
308
309 /*
310 * Mark all the bad blocks as used...
311 */
312 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
313 mke2fs_error_msg_and_die(retval, "mark bad blocks as used");
314
315 while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
316 ext2fs_mark_block_bitmap(fs->block_map, blk);
317 ext2fs_badblocks_list_iterate_end(bb_iter);
318}
319
320/*
321 * These functions implement a generalized progress meter.
322 */
323struct progress_struct {
324 char format[20];
325 char backup[80];
326 __u32 max;
327 int skip_progress;
328};
329
330static void progress_init(struct progress_struct *progress,
331 const char *label,__u32 max)
332{
333 int i;
334
335 memset(progress, 0, sizeof(struct progress_struct));
336 if (quiet)
337 return;
338
339 /*
340 * Figure out how many digits we need
341 */
342 i = int_log10(max);
343 sprintf(progress->format, "%%%dd/%%%dld", i, i);
344 memset(progress->backup, '\b', sizeof(progress->backup)-1);
345 progress->backup[sizeof(progress->backup)-1] = 0;
346 if ((2*i)+1 < (int) sizeof(progress->backup))
347 progress->backup[(2*i)+1] = 0;
348 progress->max = max;
349
350 progress->skip_progress = 0;
351 if (getenv("MKE2FS_SKIP_PROGRESS"))
352 progress->skip_progress++;
353
354 fputs(label, stdout);
355 fflush(stdout);
356}
357
358static void progress_update(struct progress_struct *progress, __u32 val)
359{
360 if ((progress->format[0] == 0) || progress->skip_progress)
361 return;
362 printf(progress->format, val, progress->max);
363 fputs(progress->backup, stdout);
364}
365
366static void progress_close(struct progress_struct *progress)
367{
368 if (progress->format[0] == 0)
369 return;
370 printf("%-28s\n", "done");
371}
372
373
374/*
375 * Helper function which zeros out _num_ blocks starting at _blk_. In
376 * case of an error, the details of the error is returned via _ret_blk_
377 * and _ret_count_ if they are non-NULL pointers. Returns 0 on
378 * success, and an error code on an error.
379 *
380 * As a special case, if the first argument is NULL, then it will
381 * attempt to free the static zeroizing buffer. (This is to keep
382 * programs that check for memory leaks happy.)
383 */
384static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num,
385 struct progress_struct *progress,
386 blk_t *ret_blk, int *ret_count)
387{
388 int j, count, next_update, next_update_incr;
389 static char *buf;
390 errcode_t retval;
391
392 /* If fs is null, clean up the static buffer and return */
393 if (!fs) {
394 if (buf) {
395 free(buf);
396 buf = 0;
397 }
398 return 0;
399 }
400 /* Allocate the zeroizing buffer if necessary */
401 if (!buf) {
402 buf = xzalloc(fs->blocksize * STRIDE_LENGTH);
403 }
404 /* OK, do the write loop */
405 next_update = 0;
406 next_update_incr = num / 100;
407 if (next_update_incr < 1)
408 next_update_incr = 1;
409 for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
410 count = num - j;
411 if (count > STRIDE_LENGTH)
412 count = STRIDE_LENGTH;
413 retval = io_channel_write_blk(fs->io, blk, count, buf);
414 if (retval) {
415 if (ret_count)
416 *ret_count = count;
417 if (ret_blk)
418 *ret_blk = blk;
419 return retval;
420 }
421 if (progress && j > next_update) {
422 next_update += num / 100;
423 progress_update(progress, blk);
424 }
425 }
426 return 0;
427}
428
429static void write_inode_tables(ext2_filsys fs)
430{
431 errcode_t retval;
432 blk_t blk;
433 dgrp_t i;
434 int num;
435 struct progress_struct progress;
436
437 if (quiet)
438 memset(&progress, 0, sizeof(progress));
439 else
440 progress_init(&progress, "Writing inode tables: ",
441 fs->group_desc_count);
442
443 for (i = 0; i < fs->group_desc_count; i++) {
444 progress_update(&progress, i);
445
446 blk = fs->group_desc[i].bg_inode_table;
447 num = fs->inode_blocks_per_group;
448
449 retval = zero_blocks(fs, blk, num, 0, &blk, &num);
450 mke2fs_error_msg_and_die(retval,
451 "write %d blocks in inode table starting at %d.",
452 num, blk);
453 if (sync_kludge) {
454 if (sync_kludge == 1)
455 sync();
456 else if ((i % sync_kludge) == 0)
457 sync();
458 }
459 }
460 zero_blocks(0, 0, 0, 0, 0, 0);
461 progress_close(&progress);
462}
463
464static void create_root_dir(ext2_filsys fs)
465{
466 errcode_t retval;
467 struct ext2_inode inode;
468
469 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
470 mke2fs_error_msg_and_die(retval, "create root dir");
471 if (geteuid()) {
472 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
473 mke2fs_error_msg_and_die(retval, "read root inode");
474 inode.i_uid = getuid();
475 if (inode.i_uid)
476 inode.i_gid = getgid();
477 retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
478 mke2fs_error_msg_and_die(retval, "set root inode ownership");
479 }
480}
481
482static void create_lost_and_found(ext2_filsys fs)
483{
484 errcode_t retval;
485 ext2_ino_t ino;
486 const char *name = "lost+found";
487 int i = 1;
488 char *msg = "create";
489 int lpf_size = 0;
490
491 fs->umask = 077;
492 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
493 if (retval) {
494 goto CREATE_LOST_AND_FOUND_ERROR;
495 }
496
497 retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
498 if (retval) {
499 msg = "lookup";
500 goto CREATE_LOST_AND_FOUND_ERROR;
501 }
502
503 for (; i < EXT2_NDIR_BLOCKS; i++) {
504 if ((lpf_size += fs->blocksize) >= 16*1024)
505 break;
506 retval = ext2fs_expand_dir(fs, ino);
507 msg = "expand";
508CREATE_LOST_AND_FOUND_ERROR:
509 mke2fs_error_msg_and_die(retval, "%s %s", msg, name);
510 }
511}
512
513static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
514{
515 errcode_t retval;
516
517 ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
518 fs->group_desc[0].bg_free_inodes_count--;
519 fs->super->s_free_inodes_count--;
520 retval = ext2fs_update_bb_inode(fs, bb_list);
521 mke2fs_error_msg_and_die(retval, "set bad block inode");
522}
523
524static void reserve_inodes(ext2_filsys fs)
525{
526 ext2_ino_t i;
527 int group;
528
529 for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
530 ext2fs_mark_inode_bitmap(fs->inode_map, i);
531 group = ext2fs_group_of_ino(fs, i);
532 fs->group_desc[group].bg_free_inodes_count--;
533 fs->super->s_free_inodes_count--;
534 }
535 ext2fs_mark_ib_dirty(fs);
536}
537
538#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
539#define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */
540#define BSD_LABEL_OFFSET 64
541
542static void zap_sector(ext2_filsys fs, int sect, int nsect)
543{
544 char *buf;
545 char *fmt = "could not %s %d";
546 int retval;
547 unsigned int *magic;
548
549 buf = xmalloc(512*nsect);
550
551 if (sect == 0) {
552 /* Check for a BSD disklabel, and don't erase it if so */
553 retval = io_channel_read_blk(fs->io, 0, -512, buf);
554 if (retval)
555 mke2fs_warning_msg(retval, fmt, "read block", 0);
556 else {
557 magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
558 if ((*magic == BSD_DISKMAGIC) ||
559 (*magic == BSD_MAGICDISK))
560 return;
561 }
562 }
563
564 memset(buf, 0, 512*nsect);
565 io_channel_set_blksize(fs->io, 512);
566 retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
567 io_channel_set_blksize(fs->io, fs->blocksize);
568 free(buf);
569 mke2fs_warning_msg(retval, fmt, "erase sector", sect);
570}
571
572static void create_journal_dev(ext2_filsys fs)
573{
574 struct progress_struct progress;
575 errcode_t retval;
576 char *buf;
577 char *fmt = "%s journal superblock";
578 blk_t blk;
579 int count;
580
581 retval = ext2fs_create_journal_superblock(fs,
582 fs->super->s_blocks_count, 0, &buf);
583 mke2fs_error_msg_and_die(retval, fmt, "init");
584 if (quiet)
585 memset(&progress, 0, sizeof(progress));
586 else
587 progress_init(&progress, "Zeroing journal device: ",
588 fs->super->s_blocks_count);
589
590 retval = zero_blocks(fs, 0, fs->super->s_blocks_count,
591 &progress, &blk, &count);
592 mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)",
593 blk, count);
594 zero_blocks(0, 0, 0, 0, 0, 0);
595
596 retval = io_channel_write_blk(fs->io,
597 fs->super->s_first_data_block+1,
598 1, buf);
599 mke2fs_error_msg_and_die(retval, fmt, "write");
600 progress_close(&progress);
601}
602
603static void show_stats(ext2_filsys fs)
604{
605 struct ext2_super_block *s = fs->super;
606 char *os;
607 blk_t group_block;
608 dgrp_t i;
609 int need, col_left;
610
611 mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count),
612 "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count);
613 os = e2p_os2string(fs->super->s_creator_os);
614 printf( "Filesystem label=%.*s\n"
615 "OS type: %s\n"
616 "Block size=%u (log=%u)\n"
617 "Fragment size=%u (log=%u)\n"
618 "%u inodes, %u blocks\n"
619 "%u blocks (%2.2f%%) reserved for the super user\n"
620 "First data block=%u\n",
621 (int) sizeof(s->s_volume_name),
622 s->s_volume_name,
623 os,
624 fs->blocksize, s->s_log_block_size,
625 fs->fragsize, s->s_log_frag_size,
626 s->s_inodes_count, s->s_blocks_count,
627 s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count,
628 s->s_first_data_block);
629 free(os);
630 if (s->s_reserved_gdt_blocks) {
631 printf("Maximum filesystem blocks=%lu\n",
632 (s->s_reserved_gdt_blocks + fs->desc_blocks) *
633 (fs->blocksize / sizeof(struct ext2_group_desc)) *
634 s->s_blocks_per_group);
635 }
636 printf( "%u block group%s\n"
637 "%u blocks per group, %u fragments per group\n"
638 "%u inodes per group\n",
639 fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "",
640 s->s_blocks_per_group, s->s_frags_per_group,
641 s->s_inodes_per_group);
642 if (fs->group_desc_count == 1) {
643 bb_putchar('\n');
644 return;
645 }
646
647 printf("Superblock backups stored on blocks: ");
648 group_block = s->s_first_data_block;
649 col_left = 0;
650 for (i = 1; i < fs->group_desc_count; i++) {
651 group_block += s->s_blocks_per_group;
652 if (!ext2fs_bg_has_super(fs, i))
653 continue;
654 if (i != 1)
655 printf(", ");
656 need = int_log10(group_block) + 2;
657 if (need > col_left) {
658 printf("\n\t");
659 col_left = 72;
660 }
661 col_left -= need;
662 printf("%u", group_block);
663 }
664 puts("\n");
665}
666
667/*
668 * Set the S_CREATOR_OS field. Return true if OS is known,
669 * otherwise, 0.
670 */
671static int set_os(struct ext2_super_block *sb, char *os)
672{
673 if (isdigit (*os)) {
674 sb->s_creator_os = atoi(os);
675 return 1;
676 }
677
678 if ((sb->s_creator_os = e2p_string2os(os)) >= 0) {
679 return 1;
680 } else if (!strcasecmp("GNU", os)) {
681 sb->s_creator_os = EXT2_OS_HURD;
682 return 1;
683 }
684 return 0;
685}
686
687static void parse_extended_opts(struct ext2_super_block *sb_param,
688 const char *opts)
689{
690 char *buf, *token, *next, *p, *arg;
691 int r_usage = 0;
692
693 buf = xstrdup(opts);
694 for (token = buf; token && *token; token = next) {
695 p = strchr(token, ',');
696 next = 0;
697 if (p) {
698 *p = 0;
699 next = p+1;
700 }
701 arg = strchr(token, '=');
702 if (arg) {
703 *arg = 0;
704 arg++;
705 }
706 if (strcmp(token, "stride") == 0) {
707 if (!arg) {
708 r_usage++;
709 continue;
710 }
711 fs_stride = strtoul(arg, &p, 0);
712 if (*p || (fs_stride == 0)) {
713 bb_error_msg("Invalid stride parameter: %s", arg);
714 r_usage++;
715 continue;
716 }
717 } else if (!strcmp(token, "resize")) {
718 unsigned long resize, bpg, rsv_groups;
719 unsigned long group_desc_count, desc_blocks;
720 unsigned int gdpb, blocksize;
721 int rsv_gdb;
722
723 if (!arg) {
724 r_usage++;
725 continue;
726 }
727
728 resize = parse_num_blocks(arg,
729 sb_param->s_log_block_size);
730
731 if (resize == 0) {
732 bb_error_msg("Invalid resize parameter: %s", arg);
733 r_usage++;
734 continue;
735 }
736 if (resize <= sb_param->s_blocks_count) {
737 bb_error_msg("The resize maximum must be greater "
738 "than the filesystem size");
739 r_usage++;
740 continue;
741 }
742
743 blocksize = EXT2_BLOCK_SIZE(sb_param);
744 bpg = sb_param->s_blocks_per_group;
745 if (!bpg)
746 bpg = blocksize * 8;
747 gdpb = blocksize / sizeof(struct ext2_group_desc);
748 group_desc_count = (sb_param->s_blocks_count +
749 bpg - 1) / bpg;
750 desc_blocks = (group_desc_count +
751 gdpb - 1) / gdpb;
752 rsv_groups = (resize + bpg - 1) / bpg;
753 rsv_gdb = (rsv_groups + gdpb - 1) / gdpb -
754 desc_blocks;
755 if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param))
756 rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param);
757
758 if (rsv_gdb > 0) {
759 sb_param->s_feature_compat |=
760 EXT2_FEATURE_COMPAT_RESIZE_INO;
761
762 sb_param->s_reserved_gdt_blocks = rsv_gdb;
763 }
764 } else
765 r_usage++;
766 }
767 if (r_usage) {
768 bb_error_msg_and_die(
769 "\nBad options specified.\n\n"
770 "Extended options are separated by commas, "
771 "and may take an argument which\n"
772 "\tis set off by an equals ('=') sign.\n\n"
773 "Valid extended options are:\n"
774 "\tstride=<stride length in blocks>\n"
775 "\tresize=<resize maximum size in blocks>\n");
776 }
777}
778
779static __u32 ok_features[3] = {
780 EXT3_FEATURE_COMPAT_HAS_JOURNAL |
781 EXT2_FEATURE_COMPAT_RESIZE_INO |
782 EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */
783 EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */
784 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
785 EXT2_FEATURE_INCOMPAT_META_BG,
786 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
787};
788
789static int PRS(int argc, char **argv)
790{
791 int c;
792 int size;
793 char * tmp;
794 int blocksize = 0;
795 int inode_ratio = 0;
796 int inode_size = 0;
797 int reserved_ratio = 5;
798 int sector_size = 0;
799 int show_version_only = 0;
800 ext2_ino_t num_inodes = 0;
801 errcode_t retval;
802 char * extended_opts = NULL;
803 const char * fs_type = NULL;
804 blk_t dev_size;
805 long sysval;
806
807 /* Update our PATH to include /sbin */
808 e2fs_set_sbin_path();
809
810 tmp = getenv("MKE2FS_SYNC");
811 if (tmp)
812 sync_kludge = atoi(tmp);
813
814 /* Determine the system page size if possible */
815#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
816#define _SC_PAGESIZE _SC_PAGE_SIZE
817#endif
818#ifdef _SC_PAGESIZE
819 sysval = sysconf(_SC_PAGESIZE);
820 if (sysval > 0)
821 sys_page_size = sysval;
822#endif /* _SC_PAGESIZE */
823
824 setbuf(stdout, NULL);
825 setbuf(stderr, NULL);
826 memset(&param, 0, sizeof(struct ext2_super_block));
827 param.s_rev_level = 1; /* Create revision 1 filesystems now */
828 param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE;
829 param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
830
831#ifdef __linux__
832 linux_version_code = get_linux_version_code();
833 if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) {
834 param.s_rev_level = 0;
835 param.s_feature_incompat = 0;
836 param.s_feature_compat = 0;
837 param.s_feature_ro_compat = 0;
838 }
839#endif
840
841 /* If called as mkfs.ext3, create a journal inode */
842 if (last_char_is(applet_name, '3'))
843 journal_size = -1;
844
845 while ((c = getopt (argc, argv,
846 "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) {
847 switch (c) {
848 case 'b':
849 blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
850 mke2fs_warning_msg((blocksize > 4096),
851 "blocksize %d not usable on most systems",
852 blocksize);
853 param.s_log_block_size =
854 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
855 break;
856 case 'c': /* Check for bad blocks */
857 case 't': /* deprecated */
858 cflag++;
859 break;
860 case 'f':
861 size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
862 param.s_log_frag_size =
863 int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
864 mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option");
865 break;
866 case 'g':
867 param.s_blocks_per_group = xatou32(optarg);
868 if ((param.s_blocks_per_group % 8) != 0) {
869 bb_error_msg_and_die("blocks per group must be multiple of 8");
870 }
871 break;
872 case 'i':
873 /* Huh? is "* 1024" correct? */
874 inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024);
875 break;
876 case 'J':
877 parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
878 break;
879 case 'j':
880 param.s_feature_compat |=
881 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
882 if (!journal_size)
883 journal_size = -1;
884 break;
885 case 'l':
886 bad_blocks_filename = optarg;
887 break;
888 case 'm':
889 reserved_ratio = xatou_range(optarg, 0, 50);
890 break;
891 case 'n':
892 noaction++;
893 break;
894 case 'o':
895 creator_os = optarg;
896 break;
897 case 'r':
898 param.s_rev_level = xatoi_positive(optarg);
899 if (param.s_rev_level == EXT2_GOOD_OLD_REV) {
900 param.s_feature_incompat = 0;
901 param.s_feature_compat = 0;
902 param.s_feature_ro_compat = 0;
903 }
904 break;
905 case 's': /* deprecated */
906 if (xatou(optarg))
907 param.s_feature_ro_compat |=
908 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
909 else
910 param.s_feature_ro_compat &=
911 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
912 break;
913#ifdef EXT2_DYNAMIC_REV
914 case 'I':
915 inode_size = xatoi_positive(optarg);
916 break;
917#endif
918 case 'N':
919 num_inodes = xatoi_positive(optarg);
920 break;
921 case 'v':
922 quiet = 0;
923 break;
924 case 'q':
925 quiet = 1;
926 break;
927 case 'F':
928 force = 1;
929 break;
930 case 'L':
931 volume_label = optarg;
932 break;
933 case 'M':
934 mount_dir = optarg;
935 break;
936 case 'O':
937 if (!strcmp(optarg, "none")) {
938 param.s_feature_compat = 0;
939 param.s_feature_incompat = 0;
940 param.s_feature_ro_compat = 0;
941 break;
942 }
943 if (e2p_edit_feature(optarg,
944 &param.s_feature_compat,
945 ok_features)) {
946 bb_error_msg_and_die("Invalid filesystem option set: %s", optarg);
947 }
948 break;
949 case 'E':
950 case 'R':
951 extended_opts = optarg;
952 break;
953 case 'S':
954 super_only = 1;
955 break;
956 case 'T':
957 fs_type = optarg;
958 break;
959 case 'V':
960 /* Print version number and exit */
961 show_version_only = 1;
962 quiet = 0;
963 break;
964 default:
965 bb_show_usage();
966 }
967 }
968 if ((optind == argc) /*&& !show_version_only*/)
969 bb_show_usage();
970 device_name = argv[optind++];
971
972 mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
973
974 if (show_version_only) {
975 return 0;
976 }
977
978 /*
979 * If there's no blocksize specified and there is a journal
980 * device, use it to figure out the blocksize
981 */
982 if (blocksize <= 0 && journal_device) {
983 ext2_filsys jfs;
984 io_manager io_ptr;
985
986#ifdef CONFIG_TESTIO_DEBUG
987 io_ptr = test_io_manager;
988 test_io_backing_manager = unix_io_manager;
989#else
990 io_ptr = unix_io_manager;
991#endif
992 retval = ext2fs_open(journal_device,
993 EXT2_FLAG_JOURNAL_DEV_OK, 0,
994 0, io_ptr, &jfs);
995 mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device);
996 if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) {
997 bb_error_msg_and_die(
998 "Journal dev blocksize (%d) smaller than "
999 "minimum blocksize %d\n", jfs->blocksize,
1000 -blocksize);
1001 }
1002 blocksize = jfs->blocksize;
1003 param.s_log_block_size =
1004 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
1005 ext2fs_close(jfs);
1006 }
1007
1008 if (blocksize > sys_page_size) {
1009 mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)",
1010 blocksize, sys_page_size);
1011 if (!force) {
1012 proceed_question();
1013 }
1014 bb_error_msg("Forced to continue");
1015 }
1016 mke2fs_warning_msg(((blocksize > 4096) &&
1017 (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)),
1018 "some 2.4 kernels do not support "
1019 "blocksizes greater than 4096 using ext3.\n"
1020 "Use -b 4096 if this is an issue for you\n");
1021
1022 if (optind < argc) {
1023 param.s_blocks_count = parse_num_blocks(argv[optind++],
1024 param.s_log_block_size);
1025 mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]);
1026 }
1027 if (optind < argc)
1028 bb_show_usage();
1029
1030 if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1031 if (!fs_type)
1032 fs_type = "journal";
1033 reserved_ratio = 0;
1034 param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV;
1035 param.s_feature_compat = 0;
1036 param.s_feature_ro_compat = 0;
1037 }
1038 if (param.s_rev_level == EXT2_GOOD_OLD_REV &&
1039 (param.s_feature_compat || param.s_feature_ro_compat ||
1040 param.s_feature_incompat))
1041 param.s_rev_level = 1; /* Create a revision 1 filesystem */
1042
1043 check_plausibility(device_name , force);
1044 check_mount(device_name, force, "filesystem");
1045
1046 param.s_log_frag_size = param.s_log_block_size;
1047
1048 if (noaction && param.s_blocks_count) {
1049 dev_size = param.s_blocks_count;
1050 retval = 0;
1051 } else {
1052 retry:
1053 retval = ext2fs_get_device_size(device_name,
1054 EXT2_BLOCK_SIZE(&param),
1055 &dev_size);
1056 if ((retval == EFBIG) &&
1057 (blocksize == 0) &&
1058 (param.s_log_block_size == 0)) {
1059 param.s_log_block_size = 2;
1060 blocksize = 4096;
1061 goto retry;
1062 }
1063 }
1064
1065 mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size");
1066
1067 if (!param.s_blocks_count) {
1068 if (retval == EXT2_ET_UNIMPLEMENTED) {
1069 mke2fs_error_msg_and_die(1,
1070 "determine device size; you "
1071 "must specify\nthe size of the "
1072 "filesystem");
1073 } else {
1074 if (dev_size == 0) {
1075 bb_error_msg_and_die(
1076 "Device size reported to be zero. "
1077 "Invalid partition specified, or\n\t"
1078 "partition table wasn't reread "
1079 "after running fdisk, due to\n\t"
1080 "a modified partition being busy "
1081 "and in use. You may need to reboot\n\t"
1082 "to re-read your partition table.\n"
1083 );
1084 }
1085 param.s_blocks_count = dev_size;
1086 if (sys_page_size > EXT2_BLOCK_SIZE(&param))
1087 param.s_blocks_count &= ~((sys_page_size /
1088 EXT2_BLOCK_SIZE(&param))-1);
1089 }
1090
1091 } else if (!force && (param.s_blocks_count > dev_size)) {
1092 bb_error_msg("Filesystem larger than apparent device size");
1093 proceed_question();
1094 }
1095
1096 /*
1097 * If the user asked for HAS_JOURNAL, then make sure a journal
1098 * gets created.
1099 */
1100 if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
1101 !journal_size)
1102 journal_size = -1;
1103
1104 /* Set first meta blockgroup via an environment variable */
1105 /* (this is mostly for debugging purposes) */
1106 if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
1107 ((tmp = getenv("MKE2FS_FIRST_META_BG"))))
1108 param.s_first_meta_bg = atoi(tmp);
1109
1110 /* Get the hardware sector size, if available */
1111 retval = ext2fs_get_device_sectsize(device_name, &sector_size);
1112 mke2fs_error_msg_and_die(retval, "determine hardware sector size");
1113
1114 if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL)
1115 sector_size = atoi(tmp);
1116
1117 set_fs_defaults(fs_type, &param, blocksize, sector_size, &inode_ratio);
1118 blocksize = EXT2_BLOCK_SIZE(&param);
1119
1120 if (extended_opts)
1121 parse_extended_opts(&param, extended_opts);
1122
1123 /* Since sparse_super is the default, we would only have a problem
1124 * here if it was explicitly disabled.
1125 */
1126 if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO) &&
1127 !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1128 bb_error_msg_and_die("reserved online resize blocks not supported "
1129 "on non-sparse filesystem");
1130 }
1131
1132 if (param.s_blocks_per_group) {
1133 if (param.s_blocks_per_group < 256 ||
1134 param.s_blocks_per_group > 8 * (unsigned) blocksize) {
1135 bb_error_msg_and_die("blocks per group count out of range");
1136 }
1137 }
1138
1139 if (!force && param.s_blocks_count >= (1 << 31)) {
1140 bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n"
1141 "\t (8TB using a blocksize of 4k) are currently supported.");
1142 }
1143
1144 if (inode_size) {
1145 if (inode_size < EXT2_GOOD_OLD_INODE_SIZE ||
1146 inode_size > EXT2_BLOCK_SIZE(&param) ||
1147 inode_size & (inode_size - 1)) {
1148 bb_error_msg_and_die("invalid inode size %d (min %d/max %d)",
1149 inode_size, EXT2_GOOD_OLD_INODE_SIZE,
1150 blocksize);
1151 }
1152 mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE),
1153 "%d-byte inodes not usable on most systems",
1154 inode_size);
1155 param.s_inode_size = inode_size;
1156 }
1157
1158 /*
1159 * Calculate number of inodes based on the inode ratio
1160 */
1161 param.s_inodes_count = num_inodes ? num_inodes :
1162 ((__u64) param.s_blocks_count * blocksize)
1163 / inode_ratio;
1164
1165 /*
1166 * Calculate number of blocks to reserve
1167 */
1168 param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
1169 return 1;
1170}
1171
1172static void mke2fs_clean_up(void)
1173{
1174 if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
1175}
1176
1177int mke2fs_main (int argc, char **argv);
1178int mke2fs_main (int argc, char **argv)
1179{
1180 errcode_t retval;
1181 ext2_filsys fs;
1182 badblocks_list bb_list = 0;
1183 unsigned int i;
1184 int val;
1185 io_manager io_ptr;
1186
1187 if (ENABLE_FEATURE_CLEAN_UP)
1188 atexit(mke2fs_clean_up);
1189 if (!PRS(argc, argv))
1190 return 0;
1191
1192#ifdef CONFIG_TESTIO_DEBUG
1193 io_ptr = test_io_manager;
1194 test_io_backing_manager = unix_io_manager;
1195#else
1196 io_ptr = unix_io_manager;
1197#endif
1198
1199 /*
1200 * Initialize the superblock....
1201 */
1202 retval = ext2fs_initialize(device_name, 0, &param,
1203 io_ptr, &fs);
1204 mke2fs_error_msg_and_die(retval, "set up superblock");
1205
1206 /*
1207 * Wipe out the old on-disk superblock
1208 */
1209 if (!noaction)
1210 zap_sector(fs, 2, 6);
1211
1212 /*
1213 * Generate a UUID for it...
1214 */
1215 uuid_generate(fs->super->s_uuid);
1216
1217 /*
1218 * Initialize the directory index variables
1219 */
1220 fs->super->s_def_hash_version = EXT2_HASH_TEA;
1221 uuid_generate((unsigned char *) fs->super->s_hash_seed);
1222
1223 /*
1224 * Add "jitter" to the superblock's check interval so that we
1225 * don't check all the filesystems at the same time. We use a
1226 * kludgy hack of using the UUID to derive a random jitter value.
1227 */
1228 for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++)
1229 val += fs->super->s_uuid[i];
1230 fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
1231
1232 /*
1233 * Override the creator OS, if applicable
1234 */
1235 if (creator_os && !set_os(fs->super, creator_os)) {
1236 bb_error_msg_and_die("unknown os - %s", creator_os);
1237 }
1238
1239 /*
1240 * For the Hurd, we will turn off filetype since it doesn't
1241 * support it.
1242 */
1243 if (fs->super->s_creator_os == EXT2_OS_HURD)
1244 fs->super->s_feature_incompat &=
1245 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
1246
1247 /*
1248 * Set the volume label...
1249 */
1250 if (volume_label) {
1251 snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label);
1252 }
1253
1254 /*
1255 * Set the last mount directory
1256 */
1257 if (mount_dir) {
1258 snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir);
1259 }
1260
1261 if (!quiet || noaction)
1262 show_stats(fs);
1263
1264 if (noaction)
1265 return 0;
1266
1267 if (fs->super->s_feature_incompat &
1268 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1269 create_journal_dev(fs);
1270 return (ext2fs_close(fs) ? 1 : 0);
1271 }
1272
1273 if (bad_blocks_filename)
1274 read_bb_file(fs, &bb_list, bad_blocks_filename);
1275 if (cflag)
1276 test_disk(fs, &bb_list);
1277
1278 handle_bad_blocks(fs, bb_list);
1279 fs->stride = fs_stride;
1280 retval = ext2fs_allocate_tables(fs);
1281 mke2fs_error_msg_and_die(retval, "allocate filesystem tables");
1282 if (super_only) {
1283 fs->super->s_state |= EXT2_ERROR_FS;
1284 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1285 } else {
1286 /* rsv must be a power of two (64kB is MD RAID sb alignment) */
1287 unsigned int rsv = 65536 / fs->blocksize;
1288 unsigned long blocks = fs->super->s_blocks_count;
1289 unsigned long start;
1290 blk_t ret_blk;
1291
1292#ifdef ZAP_BOOTBLOCK
1293 zap_sector(fs, 0, 2);
1294#endif
1295
1296 /*
1297 * Wipe out any old MD RAID (or other) metadata at the end
1298 * of the device. This will also verify that the device is
1299 * as large as we think. Be careful with very small devices.
1300 */
1301 start = (blocks & ~(rsv - 1));
1302 if (start > rsv)
1303 start -= rsv;
1304 if (start > 0)
1305 retval = zero_blocks(fs, start, blocks - start,
1306 NULL, &ret_blk, NULL);
1307
1308 mke2fs_warning_msg(retval, "can't zero block %u at end of filesystem", ret_blk);
1309 write_inode_tables(fs);
1310 create_root_dir(fs);
1311 create_lost_and_found(fs);
1312 reserve_inodes(fs);
1313 create_bad_block_inode(fs, bb_list);
1314 if (fs->super->s_feature_compat &
1315 EXT2_FEATURE_COMPAT_RESIZE_INO) {
1316 retval = ext2fs_create_resize_inode(fs);
1317 mke2fs_error_msg_and_die(retval, "reserve blocks for online resize");
1318 }
1319 }
1320
1321 if (journal_device) {
1322 make_journal_device(journal_device, fs, quiet, force);
1323 } else if (journal_size) {
1324 make_journal_blocks(fs, journal_size, journal_flags, quiet);
1325 }
1326
1327 mke2fs_verbose("Writing superblocks and filesystem accounting information: ");
1328 retval = ext2fs_flush(fs);
1329 mke2fs_warning_msg(retval, "had trouble writing out superblocks");
1330 mke2fs_verbose_done();
1331 if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG"))
1332 print_check_message(fs);
1333 val = ext2fs_close(fs);
1334 return (retval || val) ? 1 : 0;
1335}
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