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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 %u %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;
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
407 for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
408 count = num - j;
409 if (count > STRIDE_LENGTH)
410 count = STRIDE_LENGTH;
411 retval = io_channel_write_blk(fs->io, blk, count, buf);
412 if (retval) {
413 if (ret_count)
414 *ret_count = count;
415 if (ret_blk)
416 *ret_blk = blk;
417 return retval;
418 }
419 if (progress && j > next_update) {
420 next_update += num / 100;
421 progress_update(progress, blk);
422 }
423 }
424 return 0;
425}
426
427static void write_inode_tables(ext2_filsys fs)
428{
429 errcode_t retval;
430 blk_t blk;
431 dgrp_t i;
432 int num;
433 struct progress_struct progress;
434
435 if (quiet)
436 memset(&progress, 0, sizeof(progress));
437 else
438 progress_init(&progress, "Writing inode tables: ",
439 fs->group_desc_count);
440
441 for (i = 0; i < fs->group_desc_count; i++) {
442 progress_update(&progress, i);
443
444 blk = fs->group_desc[i].bg_inode_table;
445 num = fs->inode_blocks_per_group;
446
447 retval = zero_blocks(fs, blk, num, 0, &blk, &num);
448 mke2fs_error_msg_and_die(retval,
449 "write %d blocks in inode table starting at %d.",
450 num, blk);
451 if (sync_kludge) {
452 if (sync_kludge == 1)
453 sync();
454 else if ((i % sync_kludge) == 0)
455 sync();
456 }
457 }
458 zero_blocks(0, 0, 0, 0, 0, 0);
459 progress_close(&progress);
460}
461
462static void create_root_dir(ext2_filsys fs)
463{
464 errcode_t retval;
465 struct ext2_inode inode;
466
467 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
468 mke2fs_error_msg_and_die(retval, "create root dir");
469 if (geteuid()) {
470 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
471 mke2fs_error_msg_and_die(retval, "read root inode");
472 inode.i_uid = getuid();
473 if (inode.i_uid)
474 inode.i_gid = getgid();
475 retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
476 mke2fs_error_msg_and_die(retval, "set root inode ownership");
477 }
478}
479
480static void create_lost_and_found(ext2_filsys fs)
481{
482 errcode_t retval;
483 ext2_ino_t ino;
484 const char *name = "lost+found";
485 int i = 1;
486 char *msg = "create";
487 int lpf_size = 0;
488
489 fs->umask = 077;
490 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
491 if (retval) {
492 goto CREATE_LOST_AND_FOUND_ERROR;
493 }
494
495 retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
496 if (retval) {
497 msg = "lookup";
498 goto CREATE_LOST_AND_FOUND_ERROR;
499 }
500
501 for (; i < EXT2_NDIR_BLOCKS; i++) {
502 if ((lpf_size += fs->blocksize) >= 16*1024)
503 break;
504 retval = ext2fs_expand_dir(fs, ino);
505 msg = "expand";
506CREATE_LOST_AND_FOUND_ERROR:
507 mke2fs_error_msg_and_die(retval, "%s %s", msg, name);
508 }
509}
510
511static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
512{
513 errcode_t retval;
514
515 ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
516 fs->group_desc[0].bg_free_inodes_count--;
517 fs->super->s_free_inodes_count--;
518 retval = ext2fs_update_bb_inode(fs, bb_list);
519 mke2fs_error_msg_and_die(retval, "set bad block inode");
520}
521
522static void reserve_inodes(ext2_filsys fs)
523{
524 ext2_ino_t i;
525 int group;
526
527 for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
528 ext2fs_mark_inode_bitmap(fs->inode_map, i);
529 group = ext2fs_group_of_ino(fs, i);
530 fs->group_desc[group].bg_free_inodes_count--;
531 fs->super->s_free_inodes_count--;
532 }
533 ext2fs_mark_ib_dirty(fs);
534}
535
536#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
537#define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */
538#define BSD_LABEL_OFFSET 64
539
540static void zap_sector(ext2_filsys fs, int sect, int nsect)
541{
542 char *buf;
543 char *fmt = "could not %s %d";
544 int retval;
545 unsigned int *magic;
546
547 buf = xmalloc(512*nsect);
548
549 if (sect == 0) {
550 /* Check for a BSD disklabel, and don't erase it if so */
551 retval = io_channel_read_blk(fs->io, 0, -512, buf);
552 if (retval)
553 mke2fs_warning_msg(retval, fmt, "read block", 0);
554 else {
555 magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
556 if ((*magic == BSD_DISKMAGIC) ||
557 (*magic == BSD_MAGICDISK))
558 return;
559 }
560 }
561
562 memset(buf, 0, 512*nsect);
563 io_channel_set_blksize(fs->io, 512);
564 retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
565 io_channel_set_blksize(fs->io, fs->blocksize);
566 free(buf);
567 mke2fs_warning_msg(retval, fmt, "erase sector", sect);
568}
569
570static void create_journal_dev(ext2_filsys fs)
571{
572 struct progress_struct progress;
573 errcode_t retval;
574 char *buf;
575 char *fmt = "%s journal superblock";
576 blk_t blk;
577 int count;
578
579 retval = ext2fs_create_journal_superblock(fs,
580 fs->super->s_blocks_count, 0, &buf);
581 mke2fs_error_msg_and_die(retval, fmt, "init");
582 if (quiet)
583 memset(&progress, 0, sizeof(progress));
584 else
585 progress_init(&progress, "Zeroing journal device: ",
586 fs->super->s_blocks_count);
587
588 retval = zero_blocks(fs, 0, fs->super->s_blocks_count,
589 &progress, &blk, &count);
590 mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)",
591 blk, count);
592 zero_blocks(0, 0, 0, 0, 0, 0);
593
594 retval = io_channel_write_blk(fs->io,
595 fs->super->s_first_data_block+1,
596 1, buf);
597 mke2fs_error_msg_and_die(retval, fmt, "write");
598 progress_close(&progress);
599}
600
601static void show_stats(ext2_filsys fs)
602{
603 struct ext2_super_block *s = fs->super;
604 char *os;
605 blk_t group_block;
606 dgrp_t i;
607 int need, col_left;
608
609 mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count),
610 "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count);
611 os = e2p_os2string(fs->super->s_creator_os);
612 printf( "Filesystem label=%.*s\n"
613 "OS type: %s\n"
614 "Block size=%u (log=%u)\n"
615 "Fragment size=%u (log=%u)\n"
616 "%u inodes, %u blocks\n"
617 "%u blocks (%2.2f%%) reserved for the super user\n"
618 "First data block=%u\n",
619 (int) sizeof(s->s_volume_name),
620 s->s_volume_name,
621 os,
622 fs->blocksize, s->s_log_block_size,
623 fs->fragsize, s->s_log_frag_size,
624 s->s_inodes_count, s->s_blocks_count,
625 s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count,
626 s->s_first_data_block);
627 free(os);
628 if (s->s_reserved_gdt_blocks) {
629 printf("Maximum filesystem blocks=%lu\n",
630 (s->s_reserved_gdt_blocks + fs->desc_blocks) *
631 (fs->blocksize / sizeof(struct ext2_group_desc)) *
632 s->s_blocks_per_group);
633 }
634 printf( "%u block group%s\n"
635 "%u blocks per group, %u fragments per group\n"
636 "%u inodes per group\n",
637 fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "",
638 s->s_blocks_per_group, s->s_frags_per_group,
639 s->s_inodes_per_group);
640 if (fs->group_desc_count == 1) {
641 bb_putchar('\n');
642 return;
643 }
644
645 printf("Superblock backups stored on blocks: ");
646 group_block = s->s_first_data_block;
647 col_left = 0;
648 for (i = 1; i < fs->group_desc_count; i++) {
649 group_block += s->s_blocks_per_group;
650 if (!ext2fs_bg_has_super(fs, i))
651 continue;
652 if (i != 1)
653 printf(", ");
654 need = int_log10(group_block) + 2;
655 if (need > col_left) {
656 printf("\n\t");
657 col_left = 72;
658 }
659 col_left -= need;
660 printf("%u", group_block);
661 }
662 puts("\n");
663}
664
665/*
666 * Set the S_CREATOR_OS field. Return true if OS is known,
667 * otherwise, 0.
668 */
669static int set_os(struct ext2_super_block *sb, char *os)
670{
671 if (isdigit (*os)) {
672 sb->s_creator_os = atoi(os);
673 return 1;
674 }
675
676 if ((sb->s_creator_os = e2p_string2os(os)) >= 0) {
677 return 1;
678 } else if (!strcasecmp("GNU", os)) {
679 sb->s_creator_os = EXT2_OS_HURD;
680 return 1;
681 }
682 return 0;
683}
684
685static void parse_extended_opts(struct ext2_super_block *sb_param,
686 const char *opts)
687{
688 char *buf, *token, *next, *p, *arg;
689 int r_usage = 0;
690
691 buf = xstrdup(opts);
692 for (token = buf; token && *token; token = next) {
693 p = strchr(token, ',');
694 next = 0;
695 if (p) {
696 *p = 0;
697 next = p+1;
698 }
699 arg = strchr(token, '=');
700 if (arg) {
701 *arg = 0;
702 arg++;
703 }
704 if (strcmp(token, "stride") == 0) {
705 if (!arg) {
706 r_usage++;
707 continue;
708 }
709 fs_stride = strtoul(arg, &p, 0);
710 if (*p || (fs_stride == 0)) {
711 bb_error_msg("Invalid stride parameter: %s", arg);
712 r_usage++;
713 continue;
714 }
715 } else if (!strcmp(token, "resize")) {
716 unsigned long resize, bpg, rsv_groups;
717 unsigned long group_desc_count, desc_blocks;
718 unsigned int gdpb, blocksize;
719 int rsv_gdb;
720
721 if (!arg) {
722 r_usage++;
723 continue;
724 }
725
726 resize = parse_num_blocks(arg,
727 sb_param->s_log_block_size);
728
729 if (resize == 0) {
730 bb_error_msg("Invalid resize parameter: %s", arg);
731 r_usage++;
732 continue;
733 }
734 if (resize <= sb_param->s_blocks_count) {
735 bb_error_msg("The resize maximum must be greater "
736 "than the filesystem size");
737 r_usage++;
738 continue;
739 }
740
741 blocksize = EXT2_BLOCK_SIZE(sb_param);
742 bpg = sb_param->s_blocks_per_group;
743 if (!bpg)
744 bpg = blocksize * 8;
745 gdpb = blocksize / sizeof(struct ext2_group_desc);
746 group_desc_count = (sb_param->s_blocks_count +
747 bpg - 1) / bpg;
748 desc_blocks = (group_desc_count +
749 gdpb - 1) / gdpb;
750 rsv_groups = (resize + bpg - 1) / bpg;
751 rsv_gdb = (rsv_groups + gdpb - 1) / gdpb -
752 desc_blocks;
753 if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param))
754 rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param);
755
756 if (rsv_gdb > 0) {
757 sb_param->s_feature_compat |=
758 EXT2_FEATURE_COMPAT_RESIZE_INO;
759
760 sb_param->s_reserved_gdt_blocks = rsv_gdb;
761 }
762 } else
763 r_usage++;
764 }
765 if (r_usage) {
766 bb_error_msg_and_die(
767 "\nBad options specified.\n\n"
768 "Extended options are separated by commas, "
769 "and may take an argument which\n"
770 "\tis set off by an equals ('=') sign.\n\n"
771 "Valid extended options are:\n"
772 "\tstride=<stride length in blocks>\n"
773 "\tresize=<resize maximum size in blocks>\n");
774 }
775}
776
777static __u32 ok_features[3] = {
778 EXT3_FEATURE_COMPAT_HAS_JOURNAL |
779 EXT2_FEATURE_COMPAT_RESIZE_INO |
780 EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */
781 EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */
782 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
783 EXT2_FEATURE_INCOMPAT_META_BG,
784 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
785};
786
787static int PRS(int argc, char **argv)
788{
789 int c;
790 int size;
791 char * tmp;
792 int blocksize = 0;
793 int inode_ratio = 0;
794 int inode_size = 0;
795 int reserved_ratio = 5;
796 int sector_size = 0;
797 int show_version_only = 0;
798 ext2_ino_t num_inodes = 0;
799 errcode_t retval;
800 char * extended_opts = NULL;
801 const char * fs_type = NULL;
802 blk_t dev_size;
803 long sysval;
804
805 /* Update our PATH to include /sbin */
806 e2fs_set_sbin_path();
807
808 tmp = getenv("MKE2FS_SYNC");
809 if (tmp)
810 sync_kludge = atoi(tmp);
811
812 /* Determine the system page size if possible */
813#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
814#define _SC_PAGESIZE _SC_PAGE_SIZE
815#endif
816#ifdef _SC_PAGESIZE
817 sysval = sysconf(_SC_PAGESIZE);
818 if (sysval > 0)
819 sys_page_size = sysval;
820#endif /* _SC_PAGESIZE */
821
822 setbuf(stdout, NULL);
823 setbuf(stderr, NULL);
824 memset(&param, 0, sizeof(struct ext2_super_block));
825 param.s_rev_level = 1; /* Create revision 1 filesystems now */
826 param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE;
827 param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
828
829#ifdef __linux__
830 linux_version_code = get_linux_version_code();
831 if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) {
832 param.s_rev_level = 0;
833 param.s_feature_incompat = 0;
834 param.s_feature_compat = 0;
835 param.s_feature_ro_compat = 0;
836 }
837#endif
838
839 /* If called as mkfs.ext3, create a journal inode */
840 if (last_char_is(applet_name, '3'))
841 journal_size = -1;
842
843 while ((c = getopt (argc, argv,
844 "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) {
845 switch (c) {
846 case 'b':
847 blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
848 mke2fs_warning_msg((blocksize > 4096),
849 "blocksize %d not usable on most systems",
850 blocksize);
851 param.s_log_block_size =
852 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
853 break;
854 case 'c': /* Check for bad blocks */
855 case 't': /* deprecated */
856 cflag++;
857 break;
858 case 'f':
859 size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
860 param.s_log_frag_size =
861 int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
862 mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option");
863 break;
864 case 'g':
865 param.s_blocks_per_group = xatou32(optarg);
866 if ((param.s_blocks_per_group % 8) != 0) {
867 bb_error_msg_and_die("blocks per group must be multiple of 8");
868 }
869 break;
870 case 'i':
871 /* Huh? is "* 1024" correct? */
872 inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024);
873 break;
874 case 'J':
875 parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
876 break;
877 case 'j':
878 param.s_feature_compat |=
879 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
880 if (!journal_size)
881 journal_size = -1;
882 break;
883 case 'l':
884 bad_blocks_filename = optarg;
885 break;
886 case 'm':
887 reserved_ratio = xatou_range(optarg, 0, 50);
888 break;
889 case 'n':
890 noaction++;
891 break;
892 case 'o':
893 creator_os = optarg;
894 break;
895 case 'r':
896 param.s_rev_level = xatoi_positive(optarg);
897 if (param.s_rev_level == EXT2_GOOD_OLD_REV) {
898 param.s_feature_incompat = 0;
899 param.s_feature_compat = 0;
900 param.s_feature_ro_compat = 0;
901 }
902 break;
903 case 's': /* deprecated */
904 if (xatou(optarg))
905 param.s_feature_ro_compat |=
906 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
907 else
908 param.s_feature_ro_compat &=
909 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
910 break;
911#ifdef EXT2_DYNAMIC_REV
912 case 'I':
913 inode_size = xatoi_positive(optarg);
914 break;
915#endif
916 case 'N':
917 num_inodes = xatoi_positive(optarg);
918 break;
919 case 'v':
920 quiet = 0;
921 break;
922 case 'q':
923 quiet = 1;
924 break;
925 case 'F':
926 force = 1;
927 break;
928 case 'L':
929 volume_label = optarg;
930 break;
931 case 'M':
932 mount_dir = optarg;
933 break;
934 case 'O':
935 if (!strcmp(optarg, "none")) {
936 param.s_feature_compat = 0;
937 param.s_feature_incompat = 0;
938 param.s_feature_ro_compat = 0;
939 break;
940 }
941 if (e2p_edit_feature(optarg,
942 &param.s_feature_compat,
943 ok_features)) {
944 bb_error_msg_and_die("Invalid filesystem option set: %s", optarg);
945 }
946 break;
947 case 'E':
948 case 'R':
949 extended_opts = optarg;
950 break;
951 case 'S':
952 super_only = 1;
953 break;
954 case 'T':
955 fs_type = optarg;
956 break;
957 case 'V':
958 /* Print version number and exit */
959 show_version_only = 1;
960 quiet = 0;
961 break;
962 default:
963 bb_show_usage();
964 }
965 }
966 if ((optind == argc) /*&& !show_version_only*/)
967 bb_show_usage();
968 device_name = argv[optind++];
969
970 mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
971
972 if (show_version_only) {
973 return 0;
974 }
975
976 /*
977 * If there's no blocksize specified and there is a journal
978 * device, use it to figure out the blocksize
979 */
980 if (blocksize <= 0 && journal_device) {
981 ext2_filsys jfs;
982 io_manager io_ptr;
983
984#ifdef CONFIG_TESTIO_DEBUG
985 io_ptr = test_io_manager;
986 test_io_backing_manager = unix_io_manager;
987#else
988 io_ptr = unix_io_manager;
989#endif
990 retval = ext2fs_open(journal_device,
991 EXT2_FLAG_JOURNAL_DEV_OK, 0,
992 0, io_ptr, &jfs);
993 mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device);
994 if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) {
995 bb_error_msg_and_die(
996 "Journal dev blocksize (%d) smaller than "
997 "minimum blocksize %d\n", jfs->blocksize,
998 -blocksize);
999 }
1000 blocksize = jfs->blocksize;
1001 param.s_log_block_size =
1002 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
1003 ext2fs_close(jfs);
1004 }
1005
1006 if (blocksize > sys_page_size) {
1007 mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)",
1008 blocksize, sys_page_size);
1009 if (!force) {
1010 proceed_question();
1011 }
1012 bb_error_msg("Forced to continue");
1013 }
1014 mke2fs_warning_msg(((blocksize > 4096) &&
1015 (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)),
1016 "some 2.4 kernels do not support "
1017 "blocksizes greater than 4096 using ext3.\n"
1018 "Use -b 4096 if this is an issue for you\n");
1019
1020 if (optind < argc) {
1021 param.s_blocks_count = parse_num_blocks(argv[optind++],
1022 param.s_log_block_size);
1023 mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]);
1024 }
1025 if (optind < argc)
1026 bb_show_usage();
1027
1028 if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1029 if (!fs_type)
1030 fs_type = "journal";
1031 reserved_ratio = 0;
1032 param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV;
1033 param.s_feature_compat = 0;
1034 param.s_feature_ro_compat = 0;
1035 }
1036 if (param.s_rev_level == EXT2_GOOD_OLD_REV &&
1037 (param.s_feature_compat || param.s_feature_ro_compat ||
1038 param.s_feature_incompat))
1039 param.s_rev_level = 1; /* Create a revision 1 filesystem */
1040
1041 check_plausibility(device_name , force);
1042 check_mount(device_name, force, "filesystem");
1043
1044 param.s_log_frag_size = param.s_log_block_size;
1045
1046 if (noaction && param.s_blocks_count) {
1047 dev_size = param.s_blocks_count;
1048 retval = 0;
1049 } else {
1050 retry:
1051 retval = ext2fs_get_device_size(device_name,
1052 EXT2_BLOCK_SIZE(&param),
1053 &dev_size);
1054 if ((retval == EFBIG) &&
1055 (blocksize == 0) &&
1056 (param.s_log_block_size == 0)) {
1057 param.s_log_block_size = 2;
1058 blocksize = 4096;
1059 goto retry;
1060 }
1061 }
1062
1063 mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size");
1064
1065 if (!param.s_blocks_count) {
1066 if (retval == EXT2_ET_UNIMPLEMENTED) {
1067 mke2fs_error_msg_and_die(1,
1068 "determine device size; you "
1069 "must specify\nthe size of the "
1070 "filesystem");
1071 } else {
1072 if (dev_size == 0) {
1073 bb_error_msg_and_die(
1074 "Device size reported to be zero. "
1075 "Invalid partition specified, or\n\t"
1076 "partition table wasn't reread "
1077 "after running fdisk, due to\n\t"
1078 "a modified partition being busy "
1079 "and in use. You may need to reboot\n\t"
1080 "to re-read your partition table.\n"
1081 );
1082 }
1083 param.s_blocks_count = dev_size;
1084 if (sys_page_size > EXT2_BLOCK_SIZE(&param))
1085 param.s_blocks_count &= ~((sys_page_size /
1086 EXT2_BLOCK_SIZE(&param))-1);
1087 }
1088
1089 } else if (!force && (param.s_blocks_count > dev_size)) {
1090 bb_error_msg("Filesystem larger than apparent device size");
1091 proceed_question();
1092 }
1093
1094 /*
1095 * If the user asked for HAS_JOURNAL, then make sure a journal
1096 * gets created.
1097 */
1098 if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
1099 !journal_size)
1100 journal_size = -1;
1101
1102 /* Set first meta blockgroup via an environment variable */
1103 /* (this is mostly for debugging purposes) */
1104 if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
1105 ((tmp = getenv("MKE2FS_FIRST_META_BG"))))
1106 param.s_first_meta_bg = atoi(tmp);
1107
1108 /* Get the hardware sector size, if available */
1109 retval = ext2fs_get_device_sectsize(device_name, &sector_size);
1110 mke2fs_error_msg_and_die(retval, "determine hardware sector size");
1111
1112 if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL)
1113 sector_size = atoi(tmp);
1114
1115 set_fs_defaults(fs_type, &param, blocksize, sector_size, &inode_ratio);
1116 blocksize = EXT2_BLOCK_SIZE(&param);
1117
1118 if (extended_opts)
1119 parse_extended_opts(&param, extended_opts);
1120
1121 /* Since sparse_super is the default, we would only have a problem
1122 * here if it was explicitly disabled.
1123 */
1124 if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INO) &&
1125 !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1126 bb_error_msg_and_die("reserved online resize blocks not supported "
1127 "on non-sparse filesystem");
1128 }
1129
1130 if (param.s_blocks_per_group) {
1131 if (param.s_blocks_per_group < 256 ||
1132 param.s_blocks_per_group > 8 * (unsigned) blocksize) {
1133 bb_error_msg_and_die("blocks per group count out of range");
1134 }
1135 }
1136
1137 if (!force && param.s_blocks_count >= (1 << 31)) {
1138 bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n"
1139 "\t (8TB using a blocksize of 4k) are currently supported.");
1140 }
1141
1142 if (inode_size) {
1143 if (inode_size < EXT2_GOOD_OLD_INODE_SIZE ||
1144 inode_size > EXT2_BLOCK_SIZE(&param) ||
1145 inode_size & (inode_size - 1)) {
1146 bb_error_msg_and_die("invalid inode size %d (min %d/max %d)",
1147 inode_size, EXT2_GOOD_OLD_INODE_SIZE,
1148 blocksize);
1149 }
1150 mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE),
1151 "%d-byte inodes not usable on most systems",
1152 inode_size);
1153 param.s_inode_size = inode_size;
1154 }
1155
1156 /*
1157 * Calculate number of inodes based on the inode ratio
1158 */
1159 param.s_inodes_count = num_inodes ? num_inodes :
1160 ((__u64) param.s_blocks_count * blocksize)
1161 / inode_ratio;
1162
1163 /*
1164 * Calculate number of blocks to reserve
1165 */
1166 param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
1167 return 1;
1168}
1169
1170static void mke2fs_clean_up(void)
1171{
1172 if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
1173}
1174
1175int mke2fs_main (int argc, char **argv);
1176int mke2fs_main (int argc, char **argv)
1177{
1178 errcode_t retval;
1179 ext2_filsys fs;
1180 badblocks_list bb_list = 0;
1181 unsigned int i;
1182 int val;
1183 io_manager io_ptr;
1184
1185 if (ENABLE_FEATURE_CLEAN_UP)
1186 atexit(mke2fs_clean_up);
1187 if (!PRS(argc, argv))
1188 return 0;
1189
1190#ifdef CONFIG_TESTIO_DEBUG
1191 io_ptr = test_io_manager;
1192 test_io_backing_manager = unix_io_manager;
1193#else
1194 io_ptr = unix_io_manager;
1195#endif
1196
1197 /*
1198 * Initialize the superblock....
1199 */
1200 retval = ext2fs_initialize(device_name, 0, &param,
1201 io_ptr, &fs);
1202 mke2fs_error_msg_and_die(retval, "set up superblock");
1203
1204 /*
1205 * Wipe out the old on-disk superblock
1206 */
1207 if (!noaction)
1208 zap_sector(fs, 2, 6);
1209
1210 /*
1211 * Generate a UUID for it...
1212 */
1213 uuid_generate(fs->super->s_uuid);
1214
1215 /*
1216 * Initialize the directory index variables
1217 */
1218 fs->super->s_def_hash_version = EXT2_HASH_TEA;
1219 uuid_generate((unsigned char *) fs->super->s_hash_seed);
1220
1221 /*
1222 * Add "jitter" to the superblock's check interval so that we
1223 * don't check all the filesystems at the same time. We use a
1224 * kludgy hack of using the UUID to derive a random jitter value.
1225 */
1226 for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++)
1227 val += fs->super->s_uuid[i];
1228 fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
1229
1230 /*
1231 * Override the creator OS, if applicable
1232 */
1233 if (creator_os && !set_os(fs->super, creator_os)) {
1234 bb_error_msg_and_die("unknown os - %s", creator_os);
1235 }
1236
1237 /*
1238 * For the Hurd, we will turn off filetype since it doesn't
1239 * support it.
1240 */
1241 if (fs->super->s_creator_os == EXT2_OS_HURD)
1242 fs->super->s_feature_incompat &=
1243 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
1244
1245 /*
1246 * Set the volume label...
1247 */
1248 if (volume_label) {
1249 snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label);
1250 }
1251
1252 /*
1253 * Set the last mount directory
1254 */
1255 if (mount_dir) {
1256 snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir);
1257 }
1258
1259 if (!quiet || noaction)
1260 show_stats(fs);
1261
1262 if (noaction)
1263 return 0;
1264
1265 if (fs->super->s_feature_incompat &
1266 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1267 create_journal_dev(fs);
1268 return (ext2fs_close(fs) ? 1 : 0);
1269 }
1270
1271 if (bad_blocks_filename)
1272 read_bb_file(fs, &bb_list, bad_blocks_filename);
1273 if (cflag)
1274 test_disk(fs, &bb_list);
1275
1276 handle_bad_blocks(fs, bb_list);
1277 fs->stride = fs_stride;
1278 retval = ext2fs_allocate_tables(fs);
1279 mke2fs_error_msg_and_die(retval, "allocate filesystem tables");
1280 if (super_only) {
1281 fs->super->s_state |= EXT2_ERROR_FS;
1282 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1283 } else {
1284 /* rsv must be a power of two (64kB is MD RAID sb alignment) */
1285 unsigned int rsv = 65536 / fs->blocksize;
1286 unsigned long blocks = fs->super->s_blocks_count;
1287 unsigned long start;
1288 blk_t ret_blk;
1289
1290#ifdef ZAP_BOOTBLOCK
1291 zap_sector(fs, 0, 2);
1292#endif
1293
1294 /*
1295 * Wipe out any old MD RAID (or other) metadata at the end
1296 * of the device. This will also verify that the device is
1297 * as large as we think. Be careful with very small devices.
1298 */
1299 start = (blocks & ~(rsv - 1));
1300 if (start > rsv)
1301 start -= rsv;
1302 if (start > 0)
1303 retval = zero_blocks(fs, start, blocks - start,
1304 NULL, &ret_blk, NULL);
1305
1306 mke2fs_warning_msg(retval, "can't zero block %u at end of filesystem", ret_blk);
1307 write_inode_tables(fs);
1308 create_root_dir(fs);
1309 create_lost_and_found(fs);
1310 reserve_inodes(fs);
1311 create_bad_block_inode(fs, bb_list);
1312 if (fs->super->s_feature_compat &
1313 EXT2_FEATURE_COMPAT_RESIZE_INO) {
1314 retval = ext2fs_create_resize_inode(fs);
1315 mke2fs_error_msg_and_die(retval, "reserve blocks for online resize");
1316 }
1317 }
1318
1319 if (journal_device) {
1320 make_journal_device(journal_device, fs, quiet, force);
1321 } else if (journal_size) {
1322 make_journal_blocks(fs, journal_size, journal_flags, quiet);
1323 }
1324
1325 mke2fs_verbose("Writing superblocks and filesystem accounting information: ");
1326 retval = ext2fs_flush(fs);
1327 mke2fs_warning_msg(retval, "had trouble writing out superblocks");
1328 mke2fs_verbose_done();
1329 if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG"))
1330 print_check_message(fs);
1331 val = ext2fs_close(fs);
1332 return (retval || val) ? 1 : 0;
1333}
1334
generated by cgit at 2024-05-15 06:46:46 (GMT)