aboutsummaryrefslogtreecommitdiff
path: root/e2fsprogs/mke2fs.c
diff options
context:
space:
mode:
Diffstat (limited to 'e2fsprogs/mke2fs.c')
-rw-r--r--e2fsprogs/mke2fs.c1336
1 files changed, 1336 insertions, 0 deletions
diff --git a/e2fsprogs/mke2fs.c b/e2fsprogs/mke2fs.c
new file mode 100644
index 000000000..f25ecfb6c
--- /dev/null
+++ b/e2fsprogs/mke2fs.c
@@ -0,0 +1,1336 @@
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 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 */
11
12/* Usage: mke2fs [options] device
13 *
14 * The device may be a block device or a image of one, but this isn't
15 * enforced (but it's not much fun on a character device :-).
16 */
17
18#include <stdio.h>
19#include <string.h>
20#include <fcntl.h>
21#include <ctype.h>
22#include <time.h>
23#include <getopt.h>
24#include <unistd.h>
25#include <stdlib.h>
26#include <errno.h>
27#include <mntent.h>
28#include <sys/ioctl.h>
29#include <sys/types.h>
30
31#include "e2fsbb.h"
32#include "ext2fs/ext2_fs.h"
33#include "uuid/uuid.h"
34#include "e2p/e2p.h"
35#include "ext2fs/ext2fs.h"
36#include "util.h"
37
38#define STRIDE_LENGTH 8
39
40#ifndef __sparc__
41#define ZAP_BOOTBLOCK
42#endif
43
44static const char * device_name;
45
46/* Command line options */
47static int cflag;
48static int quiet;
49static int super_only;
50static int force;
51static int noaction;
52static int journal_size;
53static int journal_flags;
54static const char *bad_blocks_filename;
55static __u32 fs_stride;
56
57static struct ext2_super_block param;
58static char *creator_os;
59static char *volume_label;
60static char *mount_dir;
61static char *journal_device = NULL;
62static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */
63
64static int sys_page_size = 4096;
65static int linux_version_code = 0;
66
67static int int_log2(int arg)
68{
69 int l = 0;
70
71 arg >>= 1;
72 while (arg) {
73 l++;
74 arg >>= 1;
75 }
76 return l;
77}
78
79static int int_log10(unsigned int arg)
80{
81 int l;
82
83 for (l=0; arg ; l++)
84 arg = arg / 10;
85 return l;
86}
87
88/*
89 * This function sets the default parameters for a filesystem
90 *
91 * The type is specified by the user. The size is the maximum size
92 * (in megabytes) for which a set of parameters applies, with a size
93 * of zero meaning that it is the default parameter for the type.
94 * Note that order is important in the table below.
95 */
96#define DEF_MAX_BLOCKSIZE -1
97static const char default_str[] = "default";
98struct mke2fs_defaults {
99 const char *type;
100 int size;
101 int blocksize;
102 int inode_ratio;
103};
104
105static const struct mke2fs_defaults settings[] = {
106 { default_str, 0, 4096, 8192 },
107 { default_str, 512, 1024, 4096 },
108 { default_str, 3, 1024, 8192 },
109 { "journal", 0, 4096, 8192 },
110 { "news", 0, 4096, 4096 },
111 { "largefile", 0, 4096, 1024 * 1024 },
112 { "largefile4", 0, 4096, 4096 * 1024 },
113 { 0, 0, 0, 0},
114};
115
116static void set_fs_defaults(const char *fs_type,
117 struct ext2_super_block *super,
118 int blocksize, int sector_size,
119 int *inode_ratio)
120{
121 int megs;
122 int ratio = 0;
123 const struct mke2fs_defaults *p;
124 int use_bsize = 1024;
125
126 megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024;
127 if (inode_ratio)
128 ratio = *inode_ratio;
129 if (!fs_type)
130 fs_type = default_str;
131 for (p = settings; p->type; p++) {
132 if ((strcmp(p->type, fs_type) != 0) &&
133 (strcmp(p->type, default_str) != 0))
134 continue;
135 if ((p->size != 0) && (megs > p->size))
136 continue;
137 if (ratio == 0)
138 *inode_ratio = p->inode_ratio < blocksize ?
139 blocksize : p->inode_ratio;
140 use_bsize = p->blocksize;
141 }
142 if (blocksize <= 0) {
143 if (use_bsize == DEF_MAX_BLOCKSIZE) {
144 use_bsize = sys_page_size;
145 if ((linux_version_code < (2*65536 + 6*256)) &&
146 (use_bsize > 4096))
147 use_bsize = 4096;
148 }
149 if (sector_size && use_bsize < sector_size)
150 use_bsize = sector_size;
151 if ((blocksize < 0) && (use_bsize < (-blocksize)))
152 use_bsize = -blocksize;
153 blocksize = use_bsize;
154 super->s_blocks_count /= blocksize / 1024;
155 }
156 super->s_log_frag_size = super->s_log_block_size =
157 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
158}
159
160
161/*
162 * Helper function for read_bb_file and test_disk
163 */
164static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
165{
166 bb_error_msg("Bad block %u out of range; ignored", blk);
167 return;
168}
169
170/*
171 * Busybox stuff
172 */
173static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...)__attribute__ ((format (printf, 2, 3)));
174static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...)
175{
176 va_list ap;
177
178 if (retval) {
179 va_start(ap, fmt);
180 fprintf(stderr,"\nCould not ");
181 vfprintf(stderr, fmt, ap);
182 fprintf(stderr, "\n");
183 va_end(ap);
184 exit(EXIT_FAILURE);
185 }
186}
187
188static void mke2fs_verbose(const char *fmt, ...)__attribute__ ((format (printf, 1, 2)));
189static void mke2fs_verbose(const char *fmt, ...)
190{
191 va_list ap;
192
193 if (!quiet) {
194 va_start(ap, fmt);
195 vfprintf(stdout, fmt, ap);
196 fflush(stdout);
197 va_end(ap);
198 }
199}
200
201static void mke2fs_verbose_done(void)
202{
203 mke2fs_verbose("done\n");
204}
205
206static void mke2fs_warning_msg(int retval, char *fmt, ... )__attribute__ ((format (printf, 2, 3)));
207static void mke2fs_warning_msg(int retval, char *fmt, ... )
208{
209 va_list ap;
210
211 if (retval) {
212 va_start(ap, fmt);
213 fprintf(stderr,"\nWarning: ");
214 vfprintf(stderr, fmt, ap);
215 fprintf(stderr, "\n");
216 va_end(ap);
217 }
218}
219
220/*
221 * Reads the bad blocks list from a file
222 */
223static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
224 const char *bad_blocks_file)
225{
226 FILE *f;
227 errcode_t retval;
228
229 f = xfopen(bad_blocks_file, "r");
230 retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
231 fclose (f);
232 mke2fs_error_msg_and_die(retval, "read bad blocks from list");
233}
234
235/*
236 * Runs the badblocks program to test the disk
237 */
238static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
239{
240 FILE *f;
241 errcode_t retval;
242 char buf[1024];
243
244 sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize,
245 quiet ? "" : "-s ", (cflag > 1) ? "-w " : "",
246 fs->device_name, fs->super->s_blocks_count);
247 mke2fs_verbose("Running command: %s\n", buf);
248 f = popen(buf, "r");
249 if (!f) {
250 bb_perror_msg_and_die("cannot run '%s'", buf);
251 }
252 retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
253 pclose(f);
254 mke2fs_error_msg_and_die(retval, "read bad blocks from program");
255}
256
257static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
258{
259 dgrp_t i;
260 blk_t j;
261 unsigned must_be_good;
262 blk_t blk;
263 badblocks_iterate bb_iter;
264 errcode_t retval;
265 blk_t group_block;
266 int group;
267 int group_bad;
268
269 if (!bb_list)
270 return;
271
272 /*
273 * The primary superblock and group descriptors *must* be
274 * good; if not, abort.
275 */
276 must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
277 for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
278 if (ext2fs_badblocks_list_test(bb_list, i)) {
279 bb_error_msg_and_die(
280 "Block %d in primary superblock/group descriptor area bad\n"
281 "Blocks %d through %d must be good in order to build a filesystem\n"
282 "Aborting ...", i, fs->super->s_first_data_block, must_be_good);
283 }
284 }
285
286 /*
287 * See if any of the bad blocks are showing up in the backup
288 * superblocks and/or group descriptors. If so, issue a
289 * warning and adjust the block counts appropriately.
290 */
291 group_block = fs->super->s_first_data_block +
292 fs->super->s_blocks_per_group;
293
294 for (i = 1; i < fs->group_desc_count; i++) {
295 group_bad = 0;
296 for (j=0; j < fs->desc_blocks+1; j++) {
297 if (ext2fs_badblocks_list_test(bb_list,
298 group_block + j)) {
299 mke2fs_warning_msg(!group_bad,
300 "the backup superblock/group descriptors at block %d contain\n"
301 "bad blocks\n", group_block);
302 group_bad++;
303 group = ext2fs_group_of_blk(fs, group_block+j);
304 fs->group_desc[group].bg_free_blocks_count++;
305 fs->super->s_free_blocks_count++;
306 }
307 }
308 group_block += fs->super->s_blocks_per_group;
309 }
310
311 /*
312 * Mark all the bad blocks as used...
313 */
314 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
315 mke2fs_error_msg_and_die(retval, "mark bad blocks as used");
316
317 while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
318 ext2fs_mark_block_bitmap(fs->block_map, blk);
319 ext2fs_badblocks_list_iterate_end(bb_iter);
320}
321
322/*
323 * These functions implement a generalized progress meter.
324 */
325struct progress_struct {
326 char format[20];
327 char backup[80];
328 __u32 max;
329 int skip_progress;
330};
331
332static void progress_init(struct progress_struct *progress,
333 const char *label,__u32 max)
334{
335 int i;
336
337 memset(progress, 0, sizeof(struct progress_struct));
338 if (quiet)
339 return;
340
341 /*
342 * Figure out how many digits we need
343 */
344 i = int_log10(max);
345 sprintf(progress->format, "%%%dd/%%%dld", i, i);
346 memset(progress->backup, '\b', sizeof(progress->backup)-1);
347 progress->backup[sizeof(progress->backup)-1] = 0;
348 if ((2*i)+1 < (int) sizeof(progress->backup))
349 progress->backup[(2*i)+1] = 0;
350 progress->max = max;
351
352 progress->skip_progress = 0;
353 if (getenv("MKE2FS_SKIP_PROGRESS"))
354 progress->skip_progress++;
355
356 fputs(label, stdout);
357 fflush(stdout);
358}
359
360static void progress_update(struct progress_struct *progress, __u32 val)
361{
362 if ((progress->format[0] == 0) || progress->skip_progress)
363 return;
364 printf(progress->format, val, progress->max);
365 fputs(progress->backup, stdout);
366}
367
368static void progress_close(struct progress_struct *progress)
369{
370 if (progress->format[0] == 0)
371 return;
372 printf("%-28s\n", "done");
373}
374
375
376/*
377 * Helper function which zeros out _num_ blocks starting at _blk_. In
378 * case of an error, the details of the error is returned via _ret_blk_
379 * and _ret_count_ if they are non-NULL pointers. Returns 0 on
380 * success, and an error code on an error.
381 *
382 * As a special case, if the first argument is NULL, then it will
383 * attempt to free the static zeroizing buffer. (This is to keep
384 * programs that check for memory leaks happy.)
385 */
386static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num,
387 struct progress_struct *progress,
388 blk_t *ret_blk, int *ret_count)
389{
390 int j, count, next_update, next_update_incr;
391 static char *buf;
392 errcode_t retval;
393
394 /* If fs is null, clean up the static buffer and return */
395 if (!fs) {
396 if (buf) {
397 free(buf);
398 buf = 0;
399 }
400 return 0;
401 }
402 /* Allocate the zeroizing buffer if necessary */
403 if (!buf) {
404 buf = xzalloc(fs->blocksize * STRIDE_LENGTH);
405 }
406 /* OK, do the write loop */
407 next_update = 0;
408 next_update_incr = num / 100;
409 if (next_update_incr < 1)
410 next_update_incr = 1;
411 for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
412 count = num - j;
413 if (count > STRIDE_LENGTH)
414 count = STRIDE_LENGTH;
415 retval = io_channel_write_blk(fs->io, blk, count, buf);
416 if (retval) {
417 if (ret_count)
418 *ret_count = count;
419 if (ret_blk)
420 *ret_blk = blk;
421 return retval;
422 }
423 if (progress && j > next_update) {
424 next_update += num / 100;
425 progress_update(progress, blk);
426 }
427 }
428 return 0;
429}
430
431static void write_inode_tables(ext2_filsys fs)
432{
433 errcode_t retval;
434 blk_t blk;
435 dgrp_t i;
436 int num;
437 struct progress_struct progress;
438
439 if (quiet)
440 memset(&progress, 0, sizeof(progress));
441 else
442 progress_init(&progress, "Writing inode tables: ",
443 fs->group_desc_count);
444
445 for (i = 0; i < fs->group_desc_count; i++) {
446 progress_update(&progress, i);
447
448 blk = fs->group_desc[i].bg_inode_table;
449 num = fs->inode_blocks_per_group;
450
451 retval = zero_blocks(fs, blk, num, 0, &blk, &num);
452 mke2fs_error_msg_and_die(retval,
453 "write %d blocks in inode table starting at %d.",
454 num, blk);
455 if (sync_kludge) {
456 if (sync_kludge == 1)
457 sync();
458 else if ((i % sync_kludge) == 0)
459 sync();
460 }
461 }
462 zero_blocks(0, 0, 0, 0, 0, 0);
463 progress_close(&progress);
464}
465
466static void create_root_dir(ext2_filsys fs)
467{
468 errcode_t retval;
469 struct ext2_inode inode;
470
471 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
472 mke2fs_error_msg_and_die(retval, "create root dir");
473 if (geteuid()) {
474 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
475 mke2fs_error_msg_and_die(retval, "read root inode");
476 inode.i_uid = getuid();
477 if (inode.i_uid)
478 inode.i_gid = getgid();
479 retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode);
480 mke2fs_error_msg_and_die(retval, "set root inode ownership");
481 }
482}
483
484static void create_lost_and_found(ext2_filsys fs)
485{
486 errcode_t retval;
487 ext2_ino_t ino;
488 const char *name = "lost+found";
489 int i = 1;
490 char *msg = "create";
491 int lpf_size = 0;
492
493 fs->umask = 077;
494 retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
495 if (retval) {
496 goto CREATE_LOST_AND_FOUND_ERROR;
497 }
498
499 retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
500 if (retval) {
501 msg = "lookup";
502 goto CREATE_LOST_AND_FOUND_ERROR;
503 }
504
505 for (; i < EXT2_NDIR_BLOCKS; i++) {
506 if ((lpf_size += fs->blocksize) >= 16*1024)
507 break;
508 retval = ext2fs_expand_dir(fs, ino);
509 msg = "expand";
510CREATE_LOST_AND_FOUND_ERROR:
511 mke2fs_error_msg_and_die(retval, "%s %s", msg, name);
512 }
513}
514
515static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
516{
517 errcode_t retval;
518
519 ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
520 fs->group_desc[0].bg_free_inodes_count--;
521 fs->super->s_free_inodes_count--;
522 retval = ext2fs_update_bb_inode(fs, bb_list);
523 mke2fs_error_msg_and_die(retval, "set bad block inode");
524}
525
526static void reserve_inodes(ext2_filsys fs)
527{
528 ext2_ino_t i;
529 int group;
530
531 for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
532 ext2fs_mark_inode_bitmap(fs->inode_map, i);
533 group = ext2fs_group_of_ino(fs, i);
534 fs->group_desc[group].bg_free_inodes_count--;
535 fs->super->s_free_inodes_count--;
536 }
537 ext2fs_mark_ib_dirty(fs);
538}
539
540#define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */
541#define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */
542#define BSD_LABEL_OFFSET 64
543
544static void zap_sector(ext2_filsys fs, int sect, int nsect)
545{
546 char *buf;
547 char *fmt = "could not %s %d";
548 int retval;
549 unsigned int *magic;
550
551 buf = xmalloc(512*nsect);
552
553 if (sect == 0) {
554 /* Check for a BSD disklabel, and don't erase it if so */
555 retval = io_channel_read_blk(fs->io, 0, -512, buf);
556 if (retval)
557 mke2fs_warning_msg(retval, fmt, "read block", 0);
558 else {
559 magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
560 if ((*magic == BSD_DISKMAGIC) ||
561 (*magic == BSD_MAGICDISK))
562 return;
563 }
564 }
565
566 memset(buf, 0, 512*nsect);
567 io_channel_set_blksize(fs->io, 512);
568 retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
569 io_channel_set_blksize(fs->io, fs->blocksize);
570 free(buf);
571 mke2fs_warning_msg(retval, fmt, "erase sector", sect);
572}
573
574static void create_journal_dev(ext2_filsys fs)
575{
576 struct progress_struct progress;
577 errcode_t retval;
578 char *buf;
579 char *fmt = "%s journal superblock";
580 blk_t blk;
581 int count;
582
583 retval = ext2fs_create_journal_superblock(fs,
584 fs->super->s_blocks_count, 0, &buf);
585 mke2fs_error_msg_and_die(retval, fmt, "init");
586 if (quiet)
587 memset(&progress, 0, sizeof(progress));
588 else
589 progress_init(&progress, "Zeroing journal device: ",
590 fs->super->s_blocks_count);
591
592 retval = zero_blocks(fs, 0, fs->super->s_blocks_count,
593 &progress, &blk, &count);
594 mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)",
595 blk, count);
596 zero_blocks(0, 0, 0, 0, 0, 0);
597
598 retval = io_channel_write_blk(fs->io,
599 fs->super->s_first_data_block+1,
600 1, buf);
601 mke2fs_error_msg_and_die(retval, fmt, "write");
602 progress_close(&progress);
603}
604
605static void show_stats(ext2_filsys fs)
606{
607 struct ext2_super_block *s = fs->super;
608 char *os;
609 blk_t group_block;
610 dgrp_t i;
611 int need, col_left;
612
613 mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count),
614 "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count);
615 os = e2p_os2string(fs->super->s_creator_os);
616 printf( "Filesystem label=%.*s\n"
617 "OS type: %s\n"
618 "Block size=%u (log=%u)\n"
619 "Fragment size=%u (log=%u)\n"
620 "%u inodes, %u blocks\n"
621 "%u blocks (%2.2f%%) reserved for the super user\n"
622 "First data block=%u\n",
623 (int) sizeof(s->s_volume_name),
624 s->s_volume_name,
625 os,
626 fs->blocksize, s->s_log_block_size,
627 fs->fragsize, s->s_log_frag_size,
628 s->s_inodes_count, s->s_blocks_count,
629 s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count,
630 s->s_first_data_block);
631 free(os);
632 if (s->s_reserved_gdt_blocks) {
633 printf("Maximum filesystem blocks=%lu\n",
634 (s->s_reserved_gdt_blocks + fs->desc_blocks) *
635 (fs->blocksize / sizeof(struct ext2_group_desc)) *
636 s->s_blocks_per_group);
637 }
638 printf( "%u block group%s\n"
639 "%u blocks per group, %u fragments per group\n"
640 "%u inodes per group\n",
641 fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "",
642 s->s_blocks_per_group, s->s_frags_per_group,
643 s->s_inodes_per_group);
644 if (fs->group_desc_count == 1) {
645 puts("");
646 return;
647 }
648
649 printf("Superblock backups stored on blocks: ");
650 group_block = s->s_first_data_block;
651 col_left = 0;
652 for (i = 1; i < fs->group_desc_count; i++) {
653 group_block += s->s_blocks_per_group;
654 if (!ext2fs_bg_has_super(fs, i))
655 continue;
656 if (i != 1)
657 printf(", ");
658 need = int_log10(group_block) + 2;
659 if (need > col_left) {
660 printf("\n\t");
661 col_left = 72;
662 }
663 col_left -= need;
664 printf("%u", group_block);
665 }
666 puts("\n");
667}
668
669/*
670 * Set the S_CREATOR_OS field. Return true if OS is known,
671 * otherwise, 0.
672 */
673static int set_os(struct ext2_super_block *sb, char *os)
674{
675 if (isdigit (*os)) {
676 sb->s_creator_os = atoi(os);
677 return 1;
678 }
679
680 if((sb->s_creator_os = e2p_string2os(os)) >= 0) {
681 return 1;
682 } else if (!strcasecmp("GNU", os)) {
683 sb->s_creator_os = EXT2_OS_HURD;
684 return 1;
685 }
686 return 0;
687}
688
689static void parse_extended_opts(struct ext2_super_block *sb_param,
690 const char *opts)
691{
692 char *buf, *token, *next, *p, *arg;
693 int r_usage = 0;
694
695 buf = xstrdup(opts);
696 for (token = buf; token && *token; token = next) {
697 p = strchr(token, ',');
698 next = 0;
699 if (p) {
700 *p = 0;
701 next = p+1;
702 }
703 arg = strchr(token, '=');
704 if (arg) {
705 *arg = 0;
706 arg++;
707 }
708 if (strcmp(token, "stride") == 0) {
709 if (!arg) {
710 r_usage++;
711 continue;
712 }
713 fs_stride = strtoul(arg, &p, 0);
714 if (*p || (fs_stride == 0)) {
715 bb_error_msg("Invalid stride parameter: %s", arg);
716 r_usage++;
717 continue;
718 }
719 } else if (!strcmp(token, "resize")) {
720 unsigned long resize, bpg, rsv_groups;
721 unsigned long group_desc_count, desc_blocks;
722 unsigned int gdpb, blocksize;
723 int rsv_gdb;
724
725 if (!arg) {
726 r_usage++;
727 continue;
728 }
729
730 resize = parse_num_blocks(arg,
731 sb_param->s_log_block_size);
732
733 if (resize == 0) {
734 bb_error_msg("Invalid resize parameter: %s", arg);
735 r_usage++;
736 continue;
737 }
738 if (resize <= sb_param->s_blocks_count) {
739 bb_error_msg("The resize maximum must be greater "
740 "than the filesystem size");
741 r_usage++;
742 continue;
743 }
744
745 blocksize = EXT2_BLOCK_SIZE(sb_param);
746 bpg = sb_param->s_blocks_per_group;
747 if (!bpg)
748 bpg = blocksize * 8;
749 gdpb = blocksize / sizeof(struct ext2_group_desc);
750 group_desc_count = (sb_param->s_blocks_count +
751 bpg - 1) / bpg;
752 desc_blocks = (group_desc_count +
753 gdpb - 1) / gdpb;
754 rsv_groups = (resize + bpg - 1) / bpg;
755 rsv_gdb = (rsv_groups + gdpb - 1) / gdpb -
756 desc_blocks;
757 if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param))
758 rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param);
759
760 if (rsv_gdb > 0) {
761 sb_param->s_feature_compat |=
762 EXT2_FEATURE_COMPAT_RESIZE_INODE;
763
764 sb_param->s_reserved_gdt_blocks = rsv_gdb;
765 }
766 } else
767 r_usage++;
768 }
769 if (r_usage) {
770 bb_error_msg_and_die(
771 "\nBad options specified.\n\n"
772 "Extended options are separated by commas, "
773 "and may take an argument which\n"
774 "\tis set off by an equals ('=') sign.\n\n"
775 "Valid extended options are:\n"
776 "\tstride=<stride length in blocks>\n"
777 "\tresize=<resize maximum size in blocks>\n");
778 }
779}
780
781static __u32 ok_features[3] = {
782 EXT3_FEATURE_COMPAT_HAS_JOURNAL |
783 EXT2_FEATURE_COMPAT_RESIZE_INODE |
784 EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */
785 EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */
786 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
787 EXT2_FEATURE_INCOMPAT_META_BG,
788 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */
789};
790
791static int PRS(int argc, char *argv[])
792{
793 int c;
794 int size;
795 char * tmp;
796 int blocksize = 0;
797 int inode_ratio = 0;
798 int inode_size = 0;
799 int reserved_ratio = 5;
800 int sector_size = 0;
801 int show_version_only = 0;
802 ext2_ino_t num_inodes = 0;
803 errcode_t retval;
804 char * extended_opts = 0;
805 const char * fs_type = 0;
806 blk_t dev_size;
807 long sysval;
808
809 /* Update our PATH to include /sbin */
810 e2fs_set_sbin_path();
811
812 tmp = getenv("MKE2FS_SYNC");
813 if (tmp)
814 sync_kludge = atoi(tmp);
815
816 /* Determine the system page size if possible */
817#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
818#define _SC_PAGESIZE _SC_PAGE_SIZE
819#endif
820#ifdef _SC_PAGESIZE
821 sysval = sysconf(_SC_PAGESIZE);
822 if (sysval > 0)
823 sys_page_size = sysval;
824#endif /* _SC_PAGESIZE */
825
826 setbuf(stdout, NULL);
827 setbuf(stderr, NULL);
828 memset(&param, 0, sizeof(struct ext2_super_block));
829 param.s_rev_level = 1; /* Create revision 1 filesystems now */
830 param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE;
831 param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
832
833#ifdef __linux__
834 linux_version_code = get_linux_version_code();
835 if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) {
836 param.s_rev_level = 0;
837 param.s_feature_incompat = 0;
838 param.s_feature_compat = 0;
839 param.s_feature_ro_compat = 0;
840 }
841#endif
842
843 /* If called as mkfs.ext3, create a journal inode */
844 if (last_char_is(applet_name, '3'))
845 journal_size = -1;
846
847 while ((c = getopt (argc, argv,
848 "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) {
849 switch (c) {
850 case 'b':
851 blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
852 mke2fs_warning_msg((blocksize > 4096),
853 "blocksize %d not usable on most systems",
854 blocksize);
855 param.s_log_block_size =
856 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
857 break;
858 case 'c': /* Check for bad blocks */
859 case 't': /* deprecated */
860 cflag++;
861 break;
862 case 'f':
863 size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE);
864 param.s_log_frag_size =
865 int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
866 mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option");
867 break;
868 case 'g':
869 param.s_blocks_per_group = xatou32(optarg);
870 if ((param.s_blocks_per_group % 8) != 0) {
871 bb_error_msg_and_die("blocks per group must be multiple of 8");
872 }
873 break;
874 case 'i':
875 /* Huh? is "* 1024" correct? */
876 inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024);
877 break;
878 case 'J':
879 parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg);
880 break;
881 case 'j':
882 param.s_feature_compat |=
883 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
884 if (!journal_size)
885 journal_size = -1;
886 break;
887 case 'l':
888 bad_blocks_filename = optarg;
889 break;
890 case 'm':
891 reserved_ratio = xatou_range(optarg, 0, 50);
892 break;
893 case 'n':
894 noaction++;
895 break;
896 case 'o':
897 creator_os = optarg;
898 break;
899 case 'r':
900 param.s_rev_level = xatoi_u(optarg);
901 if (param.s_rev_level == EXT2_GOOD_OLD_REV) {
902 param.s_feature_incompat = 0;
903 param.s_feature_compat = 0;
904 param.s_feature_ro_compat = 0;
905 }
906 break;
907 case 's': /* deprecated */
908 if (xatou(optarg))
909 param.s_feature_ro_compat |=
910 EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
911 else
912 param.s_feature_ro_compat &=
913 ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
914 break;
915#ifdef EXT2_DYNAMIC_REV
916 case 'I':
917 inode_size = xatoi_u(optarg);
918 break;
919#endif
920 case 'N':
921 num_inodes = xatoi_u(optarg);
922 break;
923 case 'v':
924 quiet = 0;
925 break;
926 case 'q':
927 quiet = 1;
928 break;
929 case 'F':
930 force = 1;
931 break;
932 case 'L':
933 volume_label = optarg;
934 break;
935 case 'M':
936 mount_dir = optarg;
937 break;
938 case 'O':
939 if (!strcmp(optarg, "none")) {
940 param.s_feature_compat = 0;
941 param.s_feature_incompat = 0;
942 param.s_feature_ro_compat = 0;
943 break;
944 }
945 if (e2p_edit_feature(optarg,
946 &param.s_feature_compat,
947 ok_features)) {
948 bb_error_msg_and_die("Invalid filesystem option set: %s", optarg);
949 }
950 break;
951 case 'E':
952 case 'R':
953 extended_opts = optarg;
954 break;
955 case 'S':
956 super_only = 1;
957 break;
958 case 'T':
959 fs_type = optarg;
960 break;
961 case 'V':
962 /* Print version number and exit */
963 show_version_only = 1;
964 quiet = 0;
965 break;
966 default:
967 bb_show_usage();
968 }
969 }
970 if ((optind == argc) /*&& !show_version_only*/)
971 bb_show_usage();
972 device_name = argv[optind++];
973
974 mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
975
976 if (show_version_only) {
977 return 0;
978 }
979
980 /*
981 * If there's no blocksize specified and there is a journal
982 * device, use it to figure out the blocksize
983 */
984 if (blocksize <= 0 && journal_device) {
985 ext2_filsys jfs;
986 io_manager io_ptr;
987
988#ifdef CONFIG_TESTIO_DEBUG
989 io_ptr = test_io_manager;
990 test_io_backing_manager = unix_io_manager;
991#else
992 io_ptr = unix_io_manager;
993#endif
994 retval = ext2fs_open(journal_device,
995 EXT2_FLAG_JOURNAL_DEV_OK, 0,
996 0, io_ptr, &jfs);
997 mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device);
998 if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) {
999 bb_error_msg_and_die(
1000 "Journal dev blocksize (%d) smaller than "
1001 "minimum blocksize %d\n", jfs->blocksize,
1002 -blocksize);
1003 }
1004 blocksize = jfs->blocksize;
1005 param.s_log_block_size =
1006 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
1007 ext2fs_close(jfs);
1008 }
1009
1010 if (blocksize > sys_page_size) {
1011 mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)",
1012 blocksize, sys_page_size);
1013 if (!force) {
1014 proceed_question();
1015 }
1016 bb_error_msg("Forced to continue");
1017 }
1018 mke2fs_warning_msg(((blocksize > 4096) &&
1019 (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)),
1020 "some 2.4 kernels do not support "
1021 "blocksizes greater than 4096 using ext3.\n"
1022 "Use -b 4096 if this is an issue for you\n");
1023
1024 if (optind < argc) {
1025 param.s_blocks_count = parse_num_blocks(argv[optind++],
1026 param.s_log_block_size);
1027 mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]);
1028 }
1029 if (optind < argc)
1030 bb_show_usage();
1031
1032 if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1033 if (!fs_type)
1034 fs_type = "journal";
1035 reserved_ratio = 0;
1036 param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV;
1037 param.s_feature_compat = 0;
1038 param.s_feature_ro_compat = 0;
1039 }
1040 if (param.s_rev_level == EXT2_GOOD_OLD_REV &&
1041 (param.s_feature_compat || param.s_feature_ro_compat ||
1042 param.s_feature_incompat))
1043 param.s_rev_level = 1; /* Create a revision 1 filesystem */
1044
1045 check_plausibility(device_name , force);
1046 check_mount(device_name, force, "filesystem");
1047
1048 param.s_log_frag_size = param.s_log_block_size;
1049
1050 if (noaction && param.s_blocks_count) {
1051 dev_size = param.s_blocks_count;
1052 retval = 0;
1053 } else {
1054 retry:
1055 retval = ext2fs_get_device_size(device_name,
1056 EXT2_BLOCK_SIZE(&param),
1057 &dev_size);
1058 if ((retval == EFBIG) &&
1059 (blocksize == 0) &&
1060 (param.s_log_block_size == 0)) {
1061 param.s_log_block_size = 2;
1062 blocksize = 4096;
1063 goto retry;
1064 }
1065 }
1066
1067 mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size");
1068
1069 if (!param.s_blocks_count) {
1070 if (retval == EXT2_ET_UNIMPLEMENTED) {
1071 mke2fs_error_msg_and_die(1,
1072 "determine device size; you "
1073 "must specify\nthe size of the "
1074 "filesystem");
1075 } else {
1076 if (dev_size == 0) {
1077 bb_error_msg_and_die(
1078 "Device size reported to be zero. "
1079 "Invalid partition specified, or\n\t"
1080 "partition table wasn't reread "
1081 "after running fdisk, due to\n\t"
1082 "a modified partition being busy "
1083 "and in use. You may need to reboot\n\t"
1084 "to re-read your partition table.\n"
1085 );
1086 }
1087 param.s_blocks_count = dev_size;
1088 if (sys_page_size > EXT2_BLOCK_SIZE(&param))
1089 param.s_blocks_count &= ~((sys_page_size /
1090 EXT2_BLOCK_SIZE(&param))-1);
1091 }
1092
1093 } else if (!force && (param.s_blocks_count > dev_size)) {
1094 bb_error_msg("Filesystem larger than apparent device size");
1095 proceed_question();
1096 }
1097
1098 /*
1099 * If the user asked for HAS_JOURNAL, then make sure a journal
1100 * gets created.
1101 */
1102 if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
1103 !journal_size)
1104 journal_size = -1;
1105
1106 /* Set first meta blockgroup via an environment variable */
1107 /* (this is mostly for debugging purposes) */
1108 if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
1109 ((tmp = getenv("MKE2FS_FIRST_META_BG"))))
1110 param.s_first_meta_bg = atoi(tmp);
1111
1112 /* Get the hardware sector size, if available */
1113 retval = ext2fs_get_device_sectsize(device_name, &sector_size);
1114 mke2fs_error_msg_and_die(retval, "determine hardware sector size");
1115
1116 if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL)
1117 sector_size = atoi(tmp);
1118
1119 set_fs_defaults(fs_type, &param, blocksize, sector_size, &inode_ratio);
1120 blocksize = EXT2_BLOCK_SIZE(&param);
1121
1122 if (extended_opts)
1123 parse_extended_opts(&param, extended_opts);
1124
1125 /* Since sparse_super is the default, we would only have a problem
1126 * here if it was explicitly disabled.
1127 */
1128 if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
1129 !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1130 bb_error_msg_and_die("reserved online resize blocks not supported "
1131 "on non-sparse filesystem");
1132 }
1133
1134 if (param.s_blocks_per_group) {
1135 if (param.s_blocks_per_group < 256 ||
1136 param.s_blocks_per_group > 8 * (unsigned) blocksize) {
1137 bb_error_msg_and_die("blocks per group count out of range");
1138 }
1139 }
1140
1141 if (!force && param.s_blocks_count >= (1 << 31)) {
1142 bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n"
1143 "\t (8TB using a blocksize of 4k) are currently supported.");
1144 }
1145
1146 if (inode_size) {
1147 if (inode_size < EXT2_GOOD_OLD_INODE_SIZE ||
1148 inode_size > EXT2_BLOCK_SIZE(&param) ||
1149 inode_size & (inode_size - 1)) {
1150 bb_error_msg_and_die("invalid inode size %d (min %d/max %d)",
1151 inode_size, EXT2_GOOD_OLD_INODE_SIZE,
1152 blocksize);
1153 }
1154 mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE),
1155 "%d-byte inodes not usable on most systems",
1156 inode_size);
1157 param.s_inode_size = inode_size;
1158 }
1159
1160 /*
1161 * Calculate number of inodes based on the inode ratio
1162 */
1163 param.s_inodes_count = num_inodes ? num_inodes :
1164 ((__u64) param.s_blocks_count * blocksize)
1165 / inode_ratio;
1166
1167 /*
1168 * Calculate number of blocks to reserve
1169 */
1170 param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
1171 return 1;
1172}
1173
1174static void mke2fs_clean_up(void)
1175{
1176 if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device);
1177}
1178
1179int mke2fs_main (int argc, char *argv[])
1180{
1181 errcode_t retval;
1182 ext2_filsys fs;
1183 badblocks_list bb_list = 0;
1184 unsigned int i;
1185 int val;
1186 io_manager io_ptr;
1187
1188 if (ENABLE_FEATURE_CLEAN_UP)
1189 atexit(mke2fs_clean_up);
1190 if(!PRS(argc, argv))
1191 return 0;
1192
1193#ifdef CONFIG_TESTIO_DEBUG
1194 io_ptr = test_io_manager;
1195 test_io_backing_manager = unix_io_manager;
1196#else
1197 io_ptr = unix_io_manager;
1198#endif
1199
1200 /*
1201 * Initialize the superblock....
1202 */
1203 retval = ext2fs_initialize(device_name, 0, &param,
1204 io_ptr, &fs);
1205 mke2fs_error_msg_and_die(retval, "set up superblock");
1206
1207 /*
1208 * Wipe out the old on-disk superblock
1209 */
1210 if (!noaction)
1211 zap_sector(fs, 2, 6);
1212
1213 /*
1214 * Generate a UUID for it...
1215 */
1216 uuid_generate(fs->super->s_uuid);
1217
1218 /*
1219 * Initialize the directory index variables
1220 */
1221 fs->super->s_def_hash_version = EXT2_HASH_TEA;
1222 uuid_generate((unsigned char *) fs->super->s_hash_seed);
1223
1224 /*
1225 * Add "jitter" to the superblock's check interval so that we
1226 * don't check all the filesystems at the same time. We use a
1227 * kludgy hack of using the UUID to derive a random jitter value.
1228 */
1229 for (i = 0, val = 0 ; i < sizeof(fs->super->s_uuid); i++)
1230 val += fs->super->s_uuid[i];
1231 fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
1232
1233 /*
1234 * Override the creator OS, if applicable
1235 */
1236 if (creator_os && !set_os(fs->super, creator_os)) {
1237 bb_error_msg_and_die("unknown os - %s", creator_os);
1238 }
1239
1240 /*
1241 * For the Hurd, we will turn off filetype since it doesn't
1242 * support it.
1243 */
1244 if (fs->super->s_creator_os == EXT2_OS_HURD)
1245 fs->super->s_feature_incompat &=
1246 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
1247
1248 /*
1249 * Set the volume label...
1250 */
1251 if (volume_label) {
1252 snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label);
1253 }
1254
1255 /*
1256 * Set the last mount directory
1257 */
1258 if (mount_dir) {
1259 snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir);
1260 }
1261
1262 if (!quiet || noaction)
1263 show_stats(fs);
1264
1265 if (noaction)
1266 return 0;
1267
1268 if (fs->super->s_feature_incompat &
1269 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1270 create_journal_dev(fs);
1271 return (ext2fs_close(fs) ? 1 : 0);
1272 }
1273
1274 if (bad_blocks_filename)
1275 read_bb_file(fs, &bb_list, bad_blocks_filename);
1276 if (cflag)
1277 test_disk(fs, &bb_list);
1278
1279 handle_bad_blocks(fs, bb_list);
1280 fs->stride = fs_stride;
1281 retval = ext2fs_allocate_tables(fs);
1282 mke2fs_error_msg_and_die(retval, "allocate filesystem tables");
1283 if (super_only) {
1284 fs->super->s_state |= EXT2_ERROR_FS;
1285 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1286 } else {
1287 /* rsv must be a power of two (64kB is MD RAID sb alignment) */
1288 unsigned int rsv = 65536 / fs->blocksize;
1289 unsigned long blocks = fs->super->s_blocks_count;
1290 unsigned long start;
1291 blk_t ret_blk;
1292
1293#ifdef ZAP_BOOTBLOCK
1294 zap_sector(fs, 0, 2);
1295#endif
1296
1297 /*
1298 * Wipe out any old MD RAID (or other) metadata at the end
1299 * of the device. This will also verify that the device is
1300 * as large as we think. Be careful with very small devices.
1301 */
1302 start = (blocks & ~(rsv - 1));
1303 if (start > rsv)
1304 start -= rsv;
1305 if (start > 0)
1306 retval = zero_blocks(fs, start, blocks - start,
1307 NULL, &ret_blk, NULL);
1308
1309 mke2fs_warning_msg(retval, "cannot zero block %u at end of filesystem", ret_blk);
1310 write_inode_tables(fs);
1311 create_root_dir(fs);
1312 create_lost_and_found(fs);
1313 reserve_inodes(fs);
1314 create_bad_block_inode(fs, bb_list);
1315 if (fs->super->s_feature_compat &
1316 EXT2_FEATURE_COMPAT_RESIZE_INODE) {
1317 retval = ext2fs_create_resize_inode(fs);
1318 mke2fs_error_msg_and_die(retval, "reserve blocks for online resize");
1319 }
1320 }
1321
1322 if (journal_device) {
1323 make_journal_device(journal_device, fs, quiet, force);
1324 } else if (journal_size) {
1325 make_journal_blocks(fs, journal_size, journal_flags, quiet);
1326 }
1327
1328 mke2fs_verbose("Writing superblocks and filesystem accounting information: ");
1329 retval = ext2fs_flush(fs);
1330 mke2fs_warning_msg(retval, "had trouble writing out superblocks");
1331 mke2fs_verbose_done();
1332 if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG"))
1333 print_check_message(fs);
1334 val = ext2fs_close(fs);
1335 return (retval || val) ? 1 : 0;
1336}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 11:25:51 +0000