misc/mke2fs.c

   1 /*
   2  * mke2fs.c - Make a ext2fs filesystem.
   3  *
   4  * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   5  *      2003, 2004, 2005 by Theodore Ts'o.
   6  *
   7  * %Begin-Header%
   8  * This file may be redistributed under the terms of the GNU Public
   9  * License.
  10  * %End-Header%
  11  */
  12
  13 /* Usage: mke2fs [options] device
  14  *
  15  * The device may be a block device or a image of one, but this isn't
  16  * enforced (but it's not much fun on a character device :-).
  17  */
  18
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <fcntl.h>
  22 #include <ctype.h>
  23 #include <time.h>
  24 #ifdef __linux__
  25 #include <sys/utsname.h>
  26 #endif
  27 #ifdef HAVE_GETOPT_H
  28 #include <getopt.h>
  29 #else
  30 extern char *optarg;
  31 extern int optind;
  32 #endif
  33 #ifdef HAVE_UNISTD_H
  34 #include <unistd.h>
  35 #endif
  36 #ifdef HAVE_STDLIB_H
  37 #include <stdlib.h>
  38 #endif
  39 #ifdef HAVE_ERRNO_H
  40 #include <errno.h>
  41 #endif
  42 #ifdef HAVE_MNTENT_H
  43 #include <mntent.h>
  44 #endif
  45 #include <sys/ioctl.h>
  46 #include <sys/types.h>
  47
  48 #include "ext2fs/ext2_fs.h"
  49 #include "et/com_err.h"
  50 #include "uuid/uuid.h"
  51 #include "e2p/e2p.h"
  52 #include "ext2fs/ext2fs.h"
  53 #include "util.h"
  54 #include "../version.h"
  55 #include "nls-enable.h"
  56
  57 #define STRIDE_LENGTH 8
  58
  59 #ifndef __sparc__
  60 #define ZAP_BOOTBLOCK
  61 #endif
  62
  63 extern int isatty(int);
  64 extern FILE *fpopen(const char *cmd, const char *mode);
  65
  66 const char * program_name = "mke2fs";
  67 const char * device_name /* = NULL */;
  68
  69 /* Command line options */
  70 int     cflag;
  71 int     verbose;
  72 int     quiet;
  73 int     super_only;
  74 int     force;
  75 int     noaction;
  76 int     journal_size;
  77 int     journal_flags;
  78 char    *bad_blocks_filename;
  79 __u32   fs_stride;
  80
  81 struct ext2_super_block param;
  82 char *creator_os;
  83 char *volume_label;
  84 char *mount_dir;
  85 char *journal_device;
  86 int sync_kludge;        /* Set using the MKE2FS_SYNC env. option */
  87
  88 int sys_page_size = 4096;
  89 int linux_version_code = 0;
  90
  91 static void usage(void)
  92 {
  93         fprintf(stderr, _("Usage: %s [-c|-t|-l filename] [-b block-size] "
  94         "[-f fragment-size]\n\t[-i bytes-per-inode] [-j] [-J journal-options]"
  95         " [-N number-of-inodes]\n\t[-m reserved-blocks-percentage] "
  96         "[-o creator-os] [-g blocks-per-group]\n\t[-L volume-label] "
  97         "[-M last-mounted-directory] [-O feature[,...]]\n\t"
  98         "[-r fs-revision] [-R options] [-qvSV] device [blocks-count]\n"),
  99                 program_name);
 100         exit(1);
 101 }
 102
 103 static int int_log2(int arg)
 104 {
 105         int     l = 0;
 106
 107         arg >>= 1;
 108         while (arg) {
 109                 l++;
 110                 arg >>= 1;
 111         }
 112         return l;
 113 }
 114
 115 static int int_log10(unsigned int arg)
 116 {
 117         int     l;
 118
 119         for (l=0; arg ; l++)
 120                 arg = arg / 10;
 121         return l;
 122 }
 123
 124 static int parse_version_number(const char *s)
 125 {
 126         int     major, minor, rev;
 127         char    *endptr;
 128         const char *cp = s;
 129
 130         if (!s)
 131                 return 0;
 132         major = strtol(cp, &endptr, 10);
 133         if (cp == endptr || *endptr != '.')
 134                 return 0;
 135         cp = endptr + 1;
 136         minor = strtol(cp, &endptr, 10);
 137         if (cp == endptr || *endptr != '.')
 138                 return 0;
 139         cp = endptr + 1;
 140         rev = strtol(cp, &endptr, 10);
 141         if (cp == endptr)
 142                 return 0;
 143         return ((((major * 256) + minor) * 256) + rev);
 144 }
 145
 146
 147
 148 /*
 149  * This function sets the default parameters for a filesystem
 150  *
 151  * The type is specified by the user.  The size is the maximum size
 152  * (in megabytes) for which a set of parameters applies, with a size
 153  * of zero meaning that it is the default parameter for the type.
 154  * Note that order is important in the table below.
 155  */
 156 #define DEF_MAX_BLOCKSIZE -1
 157 static char default_str[] = "default";
 158 struct mke2fs_defaults {
 159         const char      *type;
 160         int             size;
 161         int             blocksize;
 162         int             inode_ratio;
 163 } settings[] = {
 164         { default_str, 0, 4096, 8192 },
 165         { default_str, 512, 1024, 4096 },
 166         { default_str, 3, 1024, 8192 },
 167         { "journal", 0, 4096, 8192 },
 168         { "news", 0, 4096, 4096 },
 169         { "largefile", 0, DEF_MAX_BLOCKSIZE, 1024 * 1024 },
 170         { "largefile4", 0, DEF_MAX_BLOCKSIZE, 4096 * 1024 },
 171         { 0, 0, 0, 0},
 172 };
 173
 174 static void set_fs_defaults(const char *fs_type,
 175                             struct ext2_super_block *super,
 176                             int blocksize, int sector_size,
 177                             int *inode_ratio)
 178 {
 179         int     megs;
 180         int     ratio = 0;
 181         struct mke2fs_defaults *p;
 182         int     use_bsize = 1024;
 183
 184         megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024;
 185         if (inode_ratio)
 186                 ratio = *inode_ratio;
 187         if (!fs_type)
 188                 fs_type = default_str;
 189         for (p = settings; p->type; p++) {
 190                 if ((strcmp(p->type, fs_type) != 0) &&
 191                     (strcmp(p->type, default_str) != 0))
 192                         continue;
 193                 if ((p->size != 0) && (megs > p->size))
 194                         continue;
 195                 if (ratio == 0)
 196                         *inode_ratio = p->inode_ratio < blocksize ?
 197                                 blocksize : p->inode_ratio;
 198                 use_bsize = p->blocksize;
 199         }
 200         if (blocksize <= 0) {
 201                 if (use_bsize == DEF_MAX_BLOCKSIZE) {
 202                         use_bsize = sys_page_size;
 203                         if ((linux_version_code < (2*65536 + 6*256)) &&
 204                             (use_bsize > 4096))
 205                                 use_bsize = 4096;
 206                 }
 207                 if (sector_size && use_bsize < sector_size)
 208                         use_bsize = sector_size;
 209                 if ((blocksize < 0) && (use_bsize < (-blocksize)))
 210                         use_bsize = -blocksize;
 211                 blocksize = use_bsize;
 212                 super->s_blocks_count /= blocksize / 1024;
 213         }
 214         super->s_log_frag_size = super->s_log_block_size =
 215                 int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
 216 }
 217
 218
 219 /*
 220  * Helper function for read_bb_file and test_disk
 221  */
 222 static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
 223 {
 224         fprintf(stderr, _("Bad block %u out of range; ignored.\n"), blk);
 225         return;
 226 }
 227
 228 /*
 229  * Reads the bad blocks list from a file
 230  */
 231 static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
 232                          const char *bad_blocks_file)
 233 {
 234         FILE            *f;
 235         errcode_t       retval;
 236
 237         f = fopen(bad_blocks_file, "r");
 238         if (!f) {
 239                 com_err("read_bad_blocks_file", errno,
 240                         _("while trying to open %s"), bad_blocks_file);
 241                 exit(1);
 242         }
 243         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 244         fclose (f);
 245         if (retval) {
 246                 com_err("ext2fs_read_bb_FILE", retval,
 247                         _("while reading in list of bad blocks from file"));
 248                 exit(1);
 249         }
 250 }
 251
 252 /*
 253  * Runs the badblocks program to test the disk
 254  */
 255 static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
 256 {
 257         FILE            *f;
 258         errcode_t       retval;
 259         char            buf[1024];
 260
 261         sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize,
 262                 quiet ? "" : "-s ", (cflag > 1) ? "-w " : "",
 263                 fs->device_name, fs->super->s_blocks_count);
 264         if (verbose)
 265                 printf(_("Running command: %s\n"), buf);
 266         f = popen(buf, "r");
 267         if (!f) {
 268                 com_err("popen", errno,
 269                         _("while trying run '%s'"), buf);
 270                 exit(1);
 271         }
 272         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 273         pclose(f);
 274         if (retval) {
 275                 com_err("ext2fs_read_bb_FILE", retval,
 276                         _("while processing list of bad blocks from program"));
 277                 exit(1);
 278         }
 279 }
 280
 281 static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
 282 {
 283         dgrp_t                  i;
 284         blk_t                   j;
 285         unsigned                must_be_good;
 286         blk_t                   blk;
 287         badblocks_iterate       bb_iter;
 288         errcode_t               retval;
 289         blk_t                   group_block;
 290         int                     group;
 291         int                     group_bad;
 292
 293         if (!bb_list)
 294                 return;
 295
 296         /*
 297          * The primary superblock and group descriptors *must* be
 298          * good; if not, abort.
 299          */
 300         must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
 301         for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
 302                 if (ext2fs_badblocks_list_test(bb_list, i)) {
 303                         fprintf(stderr, _("Block %d in primary "
 304                                 "superblock/group descriptor area bad.\n"), i);
 305                         fprintf(stderr, _("Blocks %d through %d must be good "
 306                                 "in order to build a filesystem.\n"),
 307                                 fs->super->s_first_data_block, must_be_good);
 308                         fputs(_("Aborting....\n"), stderr);
 309                         exit(1);
 310                 }
 311         }
 312
 313         /*
 314          * See if any of the bad blocks are showing up in the backup
 315          * superblocks and/or group descriptors.  If so, issue a
 316          * warning and adjust the block counts appropriately.
 317          */
 318         group_block = fs->super->s_first_data_block +
 319                 fs->super->s_blocks_per_group;
 320
 321         for (i = 1; i < fs->group_desc_count; i++) {
 322                 group_bad = 0;
 323                 for (j=0; j < fs->desc_blocks+1; j++) {
 324                         if (ext2fs_badblocks_list_test(bb_list,
 325                                                        group_block + j)) {
 326                                 if (!group_bad)
 327                                         fprintf(stderr,
 328 _("Warning: the backup superblock/group descriptors at block %d contain\n"
 329 "       bad blocks.\n\n"),
 330                                                 group_block);
 331                                 group_bad++;
 332                                 group = ext2fs_group_of_blk(fs, group_block+j);
 333                                 fs->group_desc[group].bg_free_blocks_count++;
 334                                 fs->super->s_free_blocks_count++;
 335                         }
 336                 }
 337                 group_block += fs->super->s_blocks_per_group;
 338         }
 339
 340         /*
 341          * Mark all the bad blocks as used...
 342          */
 343         retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
 344         if (retval) {
 345                 com_err("ext2fs_badblocks_list_iterate_begin", retval,
 346                         _("while marking bad blocks as used"));
 347                 exit(1);
 348         }
 349         while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
 350                 ext2fs_mark_block_bitmap(fs->block_map, blk);
 351         ext2fs_badblocks_list_iterate_end(bb_iter);
 352 }
 353
 354 /*
 355  * These functions implement a generalized progress meter.
 356  */
 357 struct progress_struct {
 358         char            format[20];
 359         char            backup[80];
 360         __u32           max;
 361         int             skip_progress;
 362 };
 363
 364 static void progress_init(struct progress_struct *progress,
 365                           const char *label,__u32 max)
 366 {
 367         int     i;
 368
 369         memset(progress, 0, sizeof(struct progress_struct));
 370         if (quiet)
 371                 return;
 372
 373         /*
 374          * Figure out how many digits we need
 375          */
 376         i = int_log10(max);
 377         sprintf(progress->format, "%%%dd/%%%dld", i, i);
 378         memset(progress->backup, '\b', sizeof(progress->backup)-1);
 379         progress->backup[sizeof(progress->backup)-1] = 0;
 380         if ((2*i)+1 < (int) sizeof(progress->backup))
 381                 progress->backup[(2*i)+1] = 0;
 382         progress->max = max;
 383
 384         progress->skip_progress = 0;
 385         if (getenv("MKE2FS_SKIP_PROGRESS"))
 386                 progress->skip_progress++;
 387
 388         fputs(label, stdout);
 389         fflush(stdout);
 390 }
 391
 392 static void progress_update(struct progress_struct *progress, __u32 val)
 393 {
 394         if ((progress->format[0] == 0) || progress->skip_progress)
 395                 return;
 396         printf(progress->format, val, progress->max);
 397         fputs(progress->backup, stdout);
 398 }
 399
 400 static void progress_close(struct progress_struct *progress)
 401 {
 402         if (progress->format[0] == 0)
 403                 return;
 404         fputs(_("done                            \n"), stdout);
 405 }
 406
 407
 408 /*
 409  * Helper function which zeros out _num_ blocks starting at _blk_.  In
 410  * case of an error, the details of the error is returned via _ret_blk_
 411  * and _ret_count_ if they are non-NULL pointers.  Returns 0 on
 412  * success, and an error code on an error.
 413  *
 414  * As a special case, if the first argument is NULL, then it will
 415  * attempt to free the static zeroizing buffer.  (This is to keep
 416  * programs that check for memory leaks happy.)
 417  */
 418 static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num,
 419                              struct progress_struct *progress,
 420                              blk_t *ret_blk, int *ret_count)
 421 {
 422         int             j, count, next_update, next_update_incr;
 423         static char     *buf;
 424         errcode_t       retval;
 425
 426         /* If fs is null, clean up the static buffer and return */
 427         if (!fs) {
 428                 if (buf) {
 429                         free(buf);
 430                         buf = 0;
 431                 }
 432                 return 0;
 433         }
 434         /* Allocate the zeroizing buffer if necessary */
 435         if (!buf) {
 436                 buf = malloc(fs->blocksize * STRIDE_LENGTH);
 437                 if (!buf) {
 438                         com_err("malloc", ENOMEM,
 439                                 _("while allocating zeroizing buffer"));
 440                         exit(1);
 441                 }
 442                 memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
 443         }
 444         /* OK, do the write loop */
 445         next_update = 0;
 446         next_update_incr = num / 100;
 447         if (next_update_incr < 1)
 448                 next_update_incr = 1;
 449         for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
 450                 count = num - j;
 451                 if (count > STRIDE_LENGTH)
 452                         count = STRIDE_LENGTH;
 453                 retval = io_channel_write_blk(fs->io, blk, count, buf);
 454                 if (retval) {
 455                         if (ret_count)
 456                                 *ret_count = count;
 457                         if (ret_blk)
 458                                 *ret_blk = blk;
 459                         return retval;
 460                 }
 461                 if (progress && j > next_update) {
 462                         next_update += num / 100;
 463                         progress_update(progress, blk);
 464                 }
 465         }
 466         return 0;
 467 }
 468
 469 static void write_inode_tables(ext2_filsys fs)
 470 {
 471         errcode_t       retval;
 472         blk_t           blk;
 473         dgrp_t          i;
 474         int             num;
 475         struct progress_struct progress;
 476
 477         if (quiet)
 478                 memset(&progress, 0, sizeof(progress));
 479         else
 480                 progress_init(&progress, _("Writing inode tables: "),
 481                               fs->group_desc_count);
 482
 483         for (i = 0; i < fs->group_desc_count; i++) {
 484                 progress_update(&progress, i);
 485
 486                 blk = fs->group_desc[i].bg_inode_table;
 487                 num = fs->inode_blocks_per_group;
 488
 489                 retval = zero_blocks(fs, blk, num, 0, &blk, &num);
 490                 if (retval) {
 491                         fprintf(stderr, _("\nCould not write %d blocks "
 492                                 "in inode table starting at %d: %s\n"),
 493                                 num, blk, error_message(retval));
 494                         exit(1);
 495                 }
 496                 if (sync_kludge) {
 497                         if (sync_kludge == 1)
 498                                 sync();
 499                         else if ((i % sync_kludge) == 0)
 500                                 sync();
 501                 }
 502         }
 503         zero_blocks(0, 0, 0, 0, 0, 0);
 504         progress_close(&progress);
 505 }
 506
 507 static void create_root_dir(ext2_filsys fs)
 508 {
 509         errcode_t       retval;
 510         struct ext2_inode       inode;
 511
 512         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
 513         if (retval) {
 514                 com_err("ext2fs_mkdir", retval, _("while creating root dir"));
 515                 exit(1);
 516         }
 517         if (geteuid()) {
 518                 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
 519                 if (retval) {
 520                         com_err("ext2fs_read_inode", retval,
 521                                 _("while reading root inode"));
 522                         exit(1);
 523                 }
 524                 inode.i_uid = getuid();
 525                 if (inode.i_uid)
 526                         inode.i_gid = getgid();
 527                 retval = ext2fs_write_inode(fs, EXT2_ROOT_INO, &inode);
 528                 if (retval) {
 529                         com_err("ext2fs_write_inode", retval,
 530                                 _("while setting root inode ownership"));
 531                         exit(1);
 532                 }
 533         }
 534 }
 535
 536 static void create_lost_and_found(ext2_filsys fs)
 537 {
 538         errcode_t               retval;
 539         ext2_ino_t              ino;
 540         const char              *name = "lost+found";
 541         int                     i;
 542         int                     lpf_size = 0;
 543
 544         fs->umask = 077;
 545         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
 546         if (retval) {
 547                 com_err("ext2fs_mkdir", retval,
 548                         _("while creating /lost+found"));
 549                 exit(1);
 550         }
 551
 552         retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
 553         if (retval) {
 554                 com_err("ext2_lookup", retval,
 555                         _("while looking up /lost+found"));
 556                 exit(1);
 557         }
 558
 559         for (i=1; i < EXT2_NDIR_BLOCKS; i++) {
 560                 if ((lpf_size += fs->blocksize) >= 16*1024)
 561                         break;
 562                 retval = ext2fs_expand_dir(fs, ino);
 563                 if (retval) {
 564                         com_err("ext2fs_expand_dir", retval,
 565                                 _("while expanding /lost+found"));
 566                         exit(1);
 567                 }
 568         }
 569 }
 570
 571 static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
 572 {
 573         errcode_t       retval;
 574
 575         ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
 576         fs->group_desc[0].bg_free_inodes_count--;
 577         fs->super->s_free_inodes_count--;
 578         retval = ext2fs_update_bb_inode(fs, bb_list);
 579         if (retval) {
 580                 com_err("ext2fs_update_bb_inode", retval,
 581                         _("while setting bad block inode"));
 582                 exit(1);
 583         }
 584
 585 }
 586
 587 static void reserve_inodes(ext2_filsys fs)
 588 {
 589         ext2_ino_t      i;
 590         int             group;
 591
 592         for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
 593                 ext2fs_mark_inode_bitmap(fs->inode_map, i);
 594                 group = ext2fs_group_of_ino(fs, i);
 595                 fs->group_desc[group].bg_free_inodes_count--;
 596                 fs->super->s_free_inodes_count--;
 597         }
 598         ext2fs_mark_ib_dirty(fs);
 599 }
 600
 601 #define BSD_DISKMAGIC   (0x82564557UL)  /* The disk magic number */
 602 #define BSD_MAGICDISK   (0x57455682UL)  /* The disk magic number reversed */
 603 #define BSD_LABEL_OFFSET        64
 604
 605 static void zap_sector(ext2_filsys fs, int sect, int nsect)
 606 {
 607         char *buf;
 608         int retval;
 609         unsigned int *magic;
 610
 611         buf = malloc(512*nsect);
 612         if (!buf) {
 613                 printf(_("Out of memory erasing sectors %d-%d\n"),
 614                        sect, sect + nsect - 1);
 615                 exit(1);
 616         }
 617
 618         if (sect == 0) {
 619                 /* Check for a BSD disklabel, and don't erase it if so */
 620                 retval = io_channel_read_blk(fs->io, 0, -512, buf);
 621                 if (retval)
 622                         fprintf(stderr,
 623                                 _("Warning: could not read block 0: %s\n"),
 624                                 error_message(retval));
 625                 else {
 626                         magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
 627                         if ((*magic == BSD_DISKMAGIC) ||
 628                             (*magic == BSD_MAGICDISK))
 629                                 return;
 630                 }
 631         }
 632
 633         memset(buf, 0, 512*nsect);
 634         io_channel_set_blksize(fs->io, 512);
 635         retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
 636         io_channel_set_blksize(fs->io, fs->blocksize);
 637         free(buf);
 638         if (retval)
 639                 fprintf(stderr, _("Warning: could not erase sector %d: %s\n"),
 640                         sect, error_message(retval));
 641 }
 642
 643 static void create_journal_dev(ext2_filsys fs)
 644 {
 645         struct progress_struct progress;
 646         errcode_t               retval;
 647         char                    *buf;
 648         blk_t                   blk;
 649         int                     count;
 650
 651         retval = ext2fs_create_journal_superblock(fs,
 652                                   fs->super->s_blocks_count, 0, &buf);
 653         if (retval) {
 654                 com_err("create_journal_dev", retval,
 655                         _("while initializing journal superblock"));
 656                 exit(1);
 657         }
 658         if (quiet)
 659                 memset(&progress, 0, sizeof(progress));
 660         else
 661                 progress_init(&progress, _("Zeroing journal device: "),
 662                               fs->super->s_blocks_count);
 663
 664         retval = zero_blocks(fs, 0, fs->super->s_blocks_count,
 665                              &progress, &blk, &count);
 666         if (retval) {
 667                 com_err("create_journal_dev", retval,
 668                         _("while zeroing journal device (block %u, count %d)"),
 669                         blk, count);
 670                 exit(1);
 671         }
 672         zero_blocks(0, 0, 0, 0, 0, 0);
 673
 674         retval = io_channel_write_blk(fs->io,
 675                                       fs->super->s_first_data_block+1,
 676                                       1, buf);
 677         if (retval) {
 678                 com_err("create_journal_dev", retval,
 679                         _("while writing journal superblock"));
 680                 exit(1);
 681         }
 682         progress_close(&progress);
 683 }
 684
 685 static void show_stats(ext2_filsys fs)
 686 {
 687         struct ext2_super_block *s = fs->super;
 688         char                    buf[80];
 689         blk_t                   group_block;
 690         dgrp_t                  i;
 691         int                     need, col_left;
 692
 693         if (param.s_blocks_count != s->s_blocks_count)
 694                 fprintf(stderr, _("warning: %d blocks unused.\n\n"),
 695                        param.s_blocks_count - s->s_blocks_count);
 696
 697         memset(buf, 0, sizeof(buf));
 698         strncpy(buf, s->s_volume_name, sizeof(s->s_volume_name));
 699         printf(_("Filesystem label=%s\n"), buf);
 700         fputs(_("OS type: "), stdout);
 701         switch (fs->super->s_creator_os) {
 702             case EXT2_OS_LINUX: fputs("Linux", stdout); break;
 703             case EXT2_OS_HURD:  fputs("GNU/Hurd", stdout);   break;
 704             case EXT2_OS_MASIX: fputs ("Masix", stdout); break;
 705             case EXT2_OS_FREEBSD: fputs ("FreeBSD", stdout); break;
 706             case EXT2_OS_LITES: fputs ("Lites", stdout); break;
 707             default:            fputs(_("(unknown os)"), stdout);
 708         }
 709         printf("\n");
 710         printf(_("Block size=%u (log=%u)\n"), fs->blocksize,
 711                 s->s_log_block_size);
 712         printf(_("Fragment size=%u (log=%u)\n"), fs->fragsize,
 713                 s->s_log_frag_size);
 714         printf(_("%u inodes, %u blocks\n"), s->s_inodes_count,
 715                s->s_blocks_count);
 716         printf(_("%u blocks (%2.2f%%) reserved for the super user\n"),
 717                 s->s_r_blocks_count,
 718                100.0 * s->s_r_blocks_count / s->s_blocks_count);
 719         printf(_("First data block=%u\n"), s->s_first_data_block);
 720         if (s->s_reserved_gdt_blocks)
 721                 printf(_("Maximum filesystem blocks=%lu\n"),
 722                        (s->s_reserved_gdt_blocks + fs->desc_blocks) *
 723                        (fs->blocksize / sizeof(struct ext2_group_desc)) *
 724                        s->s_blocks_per_group);
 725         if (fs->group_desc_count > 1)
 726                 printf(_("%u block groups\n"), fs->group_desc_count);
 727         else
 728                 printf(_("%u block group\n"), fs->group_desc_count);
 729         printf(_("%u blocks per group, %u fragments per group\n"),
 730                s->s_blocks_per_group, s->s_frags_per_group);
 731         printf(_("%u inodes per group\n"), s->s_inodes_per_group);
 732
 733         if (fs->group_desc_count == 1) {
 734                 printf("\n");
 735                 return;
 736         }
 737
 738         printf(_("Superblock backups stored on blocks: "));
 739         group_block = s->s_first_data_block;
 740         col_left = 0;
 741         for (i = 1; i < fs->group_desc_count; i++) {
 742                 group_block += s->s_blocks_per_group;
 743                 if (!ext2fs_bg_has_super(fs, i))
 744                         continue;
 745                 if (i != 1)
 746                         printf(", ");
 747                 need = int_log10(group_block) + 2;
 748                 if (need > col_left) {
 749                         printf("\n\t");
 750                         col_left = 72;
 751                 }
 752                 col_left -= need;
 753                 printf("%u", group_block);
 754         }
 755         printf("\n\n");
 756 }
 757
 758 /*
 759  * Set the S_CREATOR_OS field.  Return true if OS is known,
 760  * otherwise, 0.
 761  */
 762 static int set_os(struct ext2_super_block *sb, char *os)
 763 {
 764         if (isdigit (*os))
 765                 sb->s_creator_os = atoi (os);
 766         else if (strcasecmp(os, "linux") == 0)
 767                 sb->s_creator_os = EXT2_OS_LINUX;
 768         else if (strcasecmp(os, "GNU") == 0 || strcasecmp(os, "hurd") == 0)
 769                 sb->s_creator_os = EXT2_OS_HURD;
 770         else if (strcasecmp(os, "masix") == 0)
 771                 sb->s_creator_os = EXT2_OS_MASIX;
 772         else if (strcasecmp(os, "freebsd") == 0)
 773                 sb->s_creator_os = EXT2_OS_FREEBSD;
 774         else if (strcasecmp(os, "lites") == 0)
 775                 sb->s_creator_os = EXT2_OS_LITES;
 776         else
 777                 return 0;
 778         return 1;
 779 }
 780
 781 #define PATH_SET "PATH=/sbin"
 782
 783 static void parse_extended_opts(struct ext2_super_block *param,
 784                                 const char *opts)
 785 {
 786         char    *buf, *token, *next, *p, *arg;
 787         int     len;
 788         int     r_usage = 0;
 789
 790         len = strlen(opts);
 791         buf = malloc(len+1);
 792         if (!buf) {
 793                 fprintf(stderr,
 794                         _("Couldn't allocate memory to parse options!\n"));
 795                 exit(1);
 796         }
 797         strcpy(buf, opts);
 798         for (token = buf; token && *token; token = next) {
 799                 p = strchr(token, ',');
 800                 next = 0;
 801                 if (p) {
 802                         *p = 0;
 803                         next = p+1;
 804                 }
 805                 arg = strchr(token, '=');
 806                 if (arg) {
 807                         *arg = 0;
 808                         arg++;
 809                 }
 810                 if (strcmp(token, "stride") == 0) {
 811                         if (!arg) {
 812                                 r_usage++;
 813                                 continue;
 814                         }
 815                         fs_stride = strtoul(arg, &p, 0);
 816                         if (*p || (fs_stride == 0)) {
 817                                 fprintf(stderr,
 818                                         _("Invalid stride parameter.\n"));
 819                                 r_usage++;
 820                                 continue;
 821                         }
 822                 } else if (!strcmp(token, "resize")) {
 823                         unsigned long resize, bpg, rsv_groups;
 824                         unsigned long group_desc_count, desc_blocks;
 825                         unsigned int gdpb, blocksize;
 826                         int rsv_gdb;
 827
 828                         if (!arg) {
 829                                 r_usage++;
 830                                 continue;
 831                         }
 832
 833                         resize = parse_num_blocks(arg,
 834                                                   param->s_log_block_size);
 835
 836                         if (resize == 0) {
 837                                 fprintf(stderr,
 838                                         _("Invalid resize parameter: %s\n"),
 839                                         arg);
 840                                 r_usage++;
 841                                 continue;
 842                         }
 843                         if (resize <= param->s_blocks_count) {
 844                                 fprintf(stderr,
 845                                         _("The resize maximum must be greater than the filesystem size.\n"));
 846                                 r_usage++;
 847                                 continue;
 848                         }
 849
 850                         blocksize = EXT2_BLOCK_SIZE(param);
 851                         bpg = param->s_blocks_per_group;
 852                         if (!bpg)
 853                                 bpg = blocksize * 8;
 854                         gdpb = blocksize / sizeof(struct ext2_group_desc);
 855                         group_desc_count = (param->s_blocks_count +
 856                                             bpg - 1) / bpg;
 857                         desc_blocks = (group_desc_count +
 858                                        gdpb - 1) / gdpb;
 859                         rsv_groups = (resize + bpg - 1) / bpg;
 860                         rsv_gdb = (rsv_groups + gdpb - 1) / gdpb -
 861                                 desc_blocks;
 862                         if (rsv_gdb > EXT2_ADDR_PER_BLOCK(param))
 863                                 rsv_gdb = EXT2_ADDR_PER_BLOCK(param);
 864
 865                         if (rsv_gdb > 0) {
 866                                 param->s_feature_compat |=
 867                                         EXT2_FEATURE_COMPAT_RESIZE_INODE;
 868
 869                                 param->s_reserved_gdt_blocks = rsv_gdb;
 870                         }
 871                 } else
 872                         r_usage++;
 873         }
 874         if (r_usage) {
 875                 fprintf(stderr, _("\nBad options specified.\n\n"
 876                         "Options are separated by commas, "
 877                         "and may take an argument which\n"
 878                         "\tis set off by an equals ('=') sign.\n\n"
 879                         "Valid raid options are:\n"
 880                         "\tstride=<stride length in blocks>\n"
 881                         "\tresize=<resize maximum size in blocks>\n\n"));
 882                 exit(1);
 883         }
 884 }
 885
 886 static __u32 ok_features[3] = {
 887         EXT3_FEATURE_COMPAT_HAS_JOURNAL |
 888                 EXT2_FEATURE_COMPAT_RESIZE_INODE |
 889                 EXT2_FEATURE_COMPAT_DIR_INDEX,  /* Compat */
 890         EXT2_FEATURE_INCOMPAT_FILETYPE|         /* Incompat */
 891                 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|
 892                 EXT2_FEATURE_INCOMPAT_META_BG,
 893         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
 894 };
 895
 896
 897 static void PRS(int argc, char *argv[])
 898 {
 899         int             b, c;
 900         int             size;
 901         char *          tmp;
 902         int             blocksize = 0;
 903         int             inode_ratio = 0;
 904         int             inode_size = 0;
 905         int             reserved_ratio = 5;
 906         int             sector_size = 0;
 907         int             show_version_only = 0;
 908         ext2_ino_t      num_inodes = 0;
 909         errcode_t       retval;
 910         char *          oldpath = getenv("PATH");
 911         char *          extended_opts = 0;
 912         const char *    fs_type = 0;
 913         blk_t           dev_size;
 914 #ifdef __linux__
 915         struct          utsname ut;
 916 #endif
 917         long            sysval;
 918
 919         /* Update our PATH to include /sbin  */
 920         if (oldpath) {
 921                 char *newpath;
 922
 923                 newpath = malloc(sizeof (PATH_SET) + 1 + strlen (oldpath));
 924                 strcpy (newpath, PATH_SET);
 925                 strcat (newpath, ":");
 926                 strcat (newpath, oldpath);
 927                 putenv (newpath);
 928         } else
 929                 putenv (PATH_SET);
 930
 931         tmp = getenv("MKE2FS_SYNC");
 932         if (tmp)
 933                 sync_kludge = atoi(tmp);
 934
 935         /* Determine the system page size if possible */
 936 #ifdef HAVE_SYSCONF
 937 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
 938 #define _SC_PAGESIZE _SC_PAGE_SIZE
 939 #endif
 940 #ifdef _SC_PAGESIZE
 941         sysval = sysconf(_SC_PAGESIZE);
 942         if (sysval > 0)
 943                 sys_page_size = sysval;
 944 #endif /* _SC_PAGESIZE */
 945 #endif /* HAVE_SYSCONF */
 946
 947         setbuf(stdout, NULL);
 948         setbuf(stderr, NULL);
 949         initialize_ext2_error_table();
 950         memset(&param, 0, sizeof(struct ext2_super_block));
 951         param.s_rev_level = 1;  /* Create revision 1 filesystems now */
 952         param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE;
 953         param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 954 #if 0
 955         param.s_feature_compat |= EXT2_FEATURE_COMPAT_DIR_INDEX;
 956 #endif
 957
 958 #ifdef __linux__
 959         if (uname(&ut)) {
 960                 perror("uname");
 961                 exit(1);
 962         }
 963         linux_version_code = parse_version_number(ut.release);
 964         if (linux_version_code && linux_version_code < (2*65536 + 2*256)) {
 965                 param.s_rev_level = 0;
 966                 param.s_feature_incompat = 0;
 967                 param.s_feature_compat = 0;
 968                 param.s_feature_ro_compat = 0;
 969         }
 970 #endif
 971
 972         if (argc && *argv) {
 973                 program_name = get_progname(*argv);
 974
 975                 /* If called as mkfs.ext3, create a journal inode */
 976                 if (!strcmp(program_name, "mkfs.ext3"))
 977                         journal_size = -1;
 978         }
 979
 980         while ((c = getopt (argc, argv,
 981                     "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) {
 982                 switch (c) {
 983                 case 'b':
 984                         blocksize = strtol(optarg, &tmp, 0);
 985                         b = (blocksize > 0) ? blocksize : -blocksize;
 986                         if (b < EXT2_MIN_BLOCK_SIZE ||
 987                             b > EXT2_MAX_BLOCK_SIZE || *tmp) {
 988                                 com_err(program_name, 0,
 989                                         _("bad block size - %s"), optarg);
 990                                 exit(1);
 991                         }
 992                         if (blocksize > 4096)
 993                                 fprintf(stderr, _("Warning: blocksize %d not "
 994                                                   "usable on most systems.\n"),
 995                                         blocksize);
 996                         if (blocksize > 0)
 997                                 param.s_log_block_size =
 998                                         int_log2(blocksize >>
 999                                                  EXT2_MIN_BLOCK_LOG_SIZE);
1000                         break;
1001                 case 'c':       /* Check for bad blocks */
1002                 case 't':       /* deprecated */
1003                         cflag++;
1004                         break;
1005                 case 'f':
1006                         size = strtoul(optarg, &tmp, 0);
1007                         if (size < EXT2_MIN_BLOCK_SIZE ||
1008                             size > EXT2_MAX_BLOCK_SIZE || *tmp) {
1009                                 com_err(program_name, 0,
1010                                         _("bad fragment size - %s"),
1011                                         optarg);
1012                                 exit(1);
1013                         }
1014                         param.s_log_frag_size =
1015                                 int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
1016                         fprintf(stderr, _("Warning: fragments not supported.  "
1017                                "Ignoring -f option\n"));
1018                         break;
1019                 case 'g':
1020                         param.s_blocks_per_group = strtoul(optarg, &tmp, 0);
1021                         if (*tmp) {
1022                                 com_err(program_name, 0,
1023                                         _("Illegal number for blocks per group"));
1024                                 exit(1);
1025                         }
1026                         if ((param.s_blocks_per_group % 8) != 0) {
1027                                 com_err(program_name, 0,
1028                                 _("blocks per group must be multiple of 8"));
1029                                 exit(1);
1030                         }
1031                         break;
1032                 case 'i':
1033                         inode_ratio = strtoul(optarg, &tmp, 0);
1034                         if (inode_ratio < EXT2_MIN_BLOCK_SIZE ||
1035                             inode_ratio > EXT2_MAX_BLOCK_SIZE * 1024 ||
1036                             *tmp) {
1037                                 com_err(program_name, 0,
1038                                         _("bad inode ratio %s (min %d/max %d"),
1039                                         optarg, EXT2_MIN_BLOCK_SIZE,
1040                                         EXT2_MAX_BLOCK_SIZE);
1041                                 exit(1);
1042                         }
1043                         break;
1044                 case 'J':
1045                         parse_journal_opts(optarg);
1046                         break;
1047                 case 'j':
1048                         param.s_feature_compat |=
1049                                 EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1050                         if (!journal_size)
1051                                 journal_size = -1;
1052                         break;
1053                 case 'l':
1054                         bad_blocks_filename = malloc(strlen(optarg)+1);
1055                         if (!bad_blocks_filename) {
1056                                 com_err(program_name, ENOMEM,
1057                                         _("in malloc for bad_blocks_filename"));
1058                                 exit(1);
1059                         }
1060                         strcpy(bad_blocks_filename, optarg);
1061                         break;
1062                 case 'm':
1063                         reserved_ratio = strtoul(optarg, &tmp, 0);
1064                         if (reserved_ratio > 50 || *tmp) {
1065                                 com_err(program_name, 0,
1066                                         _("bad reserved blocks percent - %s"),
1067                                         optarg);
1068                                 exit(1);
1069                         }
1070                         break;
1071                 case 'n':
1072                         noaction++;
1073                         break;
1074                 case 'o':
1075                         creator_os = optarg;
1076                         break;
1077                 case 'r':
1078                         param.s_rev_level = atoi(optarg);
1079                         if (param.s_rev_level == EXT2_GOOD_OLD_REV) {
1080                                 param.s_feature_incompat = 0;
1081                                 param.s_feature_compat = 0;
1082                                 param.s_feature_ro_compat = 0;
1083                         }
1084                         break;
1085                 case 's':       /* deprecated */
1086                         if (atoi(optarg))
1087                                 param.s_feature_ro_compat |=
1088                                         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
1089                         else
1090                                 param.s_feature_ro_compat &=
1091                                         ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
1092                         break;
1093 #ifdef EXT2_DYNAMIC_REV
1094                 case 'I':
1095                         inode_size = strtoul(optarg, &tmp, 0);
1096                         if (*tmp) {
1097                                 com_err(program_name, 0,
1098                                         _("bad inode size - %s"), optarg);
1099                                 exit(1);
1100                         }
1101                         break;
1102 #endif
1103                 case 'N':
1104                         num_inodes = atoi(optarg);
1105                         break;
1106                 case 'v':
1107                         verbose = 1;
1108                         break;
1109                 case 'q':
1110                         quiet = 1;
1111                         break;
1112                 case 'F':
1113                         force = 1;
1114                         break;
1115                 case 'L':
1116                         volume_label = optarg;
1117                         break;
1118                 case 'M':
1119                         mount_dir = optarg;
1120                         break;
1121                 case 'O':
1122                         if (!strcmp(optarg, "none")) {
1123                                 param.s_feature_compat = 0;
1124                                 param.s_feature_incompat = 0;
1125                                 param.s_feature_ro_compat = 0;
1126                                 break;
1127                         }
1128                         if (e2p_edit_feature(optarg,
1129                                             &param.s_feature_compat,
1130                                             ok_features)) {
1131                                 fprintf(stderr,
1132                                         _("Invalid filesystem option set: %s\n"), optarg);
1133                                 exit(1);
1134                         }
1135                         break;
1136                 case 'E':
1137                 case 'R':
1138                         extended_opts = optarg;
1139                         break;
1140                 case 'S':
1141                         super_only = 1;
1142                         break;
1143                 case 'T':
1144                         fs_type = optarg;
1145                         break;
1146                 case 'V':
1147                         /* Print version number and exit */
1148                         show_version_only++;
1149                         break;
1150                 default:
1151                         usage();
1152                 }
1153         }
1154         if ((optind == argc) && !show_version_only)
1155                 usage();
1156         device_name = argv[optind++];
1157
1158         if (!quiet || show_version_only)
1159                 fprintf (stderr, "mke2fs %s (%s)\n", E2FSPROGS_VERSION,
1160                          E2FSPROGS_DATE);
1161
1162         if (show_version_only) {
1163                 fprintf(stderr, _("\tUsing %s\n"),
1164                         error_message(EXT2_ET_BASE));
1165                 exit(0);
1166         }
1167
1168         /*
1169          * If there's no blocksize specified and there is a journal
1170          * device, use it to figure out the blocksize
1171          */
1172         if (blocksize <= 0 && journal_device) {
1173                 ext2_filsys     jfs;
1174                 io_manager      io_ptr;
1175
1176 #ifdef CONFIG_TESTIO_DEBUG
1177                 io_ptr = test_io_manager;
1178                 test_io_backing_manager = unix_io_manager;
1179 #else
1180                 io_ptr = unix_io_manager;
1181 #endif
1182                 retval = ext2fs_open(journal_device,
1183                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1184                                      0, io_ptr, &jfs);
1185                 if (retval) {
1186                         com_err(program_name, retval,
1187                                 _("while trying to open journal device %s\n"),
1188                                 journal_device);
1189                         exit(1);
1190                 }
1191                 if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) {
1192                         com_err(program_name, 0,
1193                                 _("Journal dev blocksize (%d) smaller than "
1194                                   "minimum blocksize %d\n"), jfs->blocksize,
1195                                 -blocksize);
1196                         exit(1);
1197                 }
1198                 blocksize = jfs->blocksize;
1199                 param.s_log_block_size =
1200                         int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
1201                 ext2fs_close(jfs);
1202         }
1203
1204         if (blocksize > sys_page_size) {
1205                 if (!force) {
1206                         com_err(program_name, 0,
1207                                 _("%d-byte blocks too big for system (max %d)"),
1208                                 blocksize, sys_page_size);
1209                         proceed_question();
1210                 }
1211                 fprintf(stderr, _("Warning: %d-byte blocks too big for system "
1212                                   "(max %d), forced to continue\n"),
1213                         blocksize, sys_page_size);
1214         }
1215         if ((blocksize > 4096) &&
1216             (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
1217                 fprintf(stderr, "\nWarning: some 2.4 kernels do not support "
1218                         "blocksizes greater than 4096 \n\tusing ext3."
1219                         "  Use -b 4096 if this is an issue for you.\n\n");
1220
1221         if (optind < argc) {
1222                 param.s_blocks_count = parse_num_blocks(argv[optind++],
1223                                 param.s_log_block_size);
1224                 if (!param.s_blocks_count) {
1225                         com_err(program_name, 0, _("bad blocks count - %s"),
1226                                 argv[optind - 1]);
1227                         exit(1);
1228                 }
1229         }
1230         if (optind < argc)
1231                 usage();
1232
1233         if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1234                 if (!fs_type)
1235                         fs_type = "journal";
1236                 reserved_ratio = 0;
1237                 param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV;
1238                 param.s_feature_compat = 0;
1239                 param.s_feature_ro_compat = 0;
1240         }
1241         if (param.s_rev_level == EXT2_GOOD_OLD_REV &&
1242             (param.s_feature_compat || param.s_feature_ro_compat ||
1243              param.s_feature_incompat))
1244                 param.s_rev_level = 1;  /* Create a revision 1 filesystem */
1245
1246         if (!force)
1247                 check_plausibility(device_name);
1248         check_mount(device_name, force, _("filesystem"));
1249
1250         param.s_log_frag_size = param.s_log_block_size;
1251
1252         if (noaction && param.s_blocks_count) {
1253                 dev_size = param.s_blocks_count;
1254                 retval = 0;
1255         } else {
1256         retry:
1257                 retval = ext2fs_get_device_size(device_name,
1258                                                 EXT2_BLOCK_SIZE(&param),
1259                                                 &dev_size);
1260                 if ((retval == EFBIG) &&
1261                     (blocksize == 0) &&
1262                     (param.s_log_block_size == 0)) {
1263                         param.s_log_block_size = 2;
1264                         blocksize = 4096;
1265                         goto retry;
1266                 }
1267         }
1268
1269         if (retval && (retval != EXT2_ET_UNIMPLEMENTED)) {
1270                 com_err(program_name, retval,
1271                         _("while trying to determine filesystem size"));
1272                 exit(1);
1273         }
1274         if (!param.s_blocks_count) {
1275                 if (retval == EXT2_ET_UNIMPLEMENTED) {
1276                         com_err(program_name, 0,
1277                                 _("Couldn't determine device size; you "
1278                                 "must specify\nthe size of the "
1279                                 "filesystem\n"));
1280                         exit(1);
1281                 } else {
1282                         if (dev_size == 0) {
1283                                 com_err(program_name, 0,
1284                                 _("Device size reported to be zero.  "
1285                                   "Invalid partition specified, or\n\t"
1286                                   "partition table wasn't reread "
1287                                   "after running fdisk, due to\n\t"
1288                                   "a modified partition being busy "
1289                                   "and in use.  You may need to reboot\n\t"
1290                                   "to re-read your partition table.\n"
1291                                   ));
1292                                 exit(1);
1293                         }
1294                         param.s_blocks_count = dev_size;
1295                         if (sys_page_size > EXT2_BLOCK_SIZE(&param))
1296                                 param.s_blocks_count &= ~((sys_page_size /
1297                                                            EXT2_BLOCK_SIZE(&param))-1);
1298                 }
1299
1300         } else if (!force && (param.s_blocks_count > dev_size)) {
1301                 com_err(program_name, 0,
1302                         _("Filesystem larger than apparent device size."));
1303                 proceed_question();
1304         }
1305
1306         /*
1307          * If the user asked for HAS_JOURNAL, then make sure a journal
1308          * gets created.
1309          */
1310         if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
1311             !journal_size)
1312                 journal_size = -1;
1313
1314         /* Set first meta blockgroup via an environment variable */
1315         /* (this is mostly for debugging purposes) */
1316         if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&
1317             ((tmp = getenv("MKE2FS_FIRST_META_BG"))))
1318                 param.s_first_meta_bg = atoi(tmp);
1319
1320         /* Get the hardware sector size, if available */
1321         retval = ext2fs_get_device_sectsize(device_name, &sector_size);
1322         if (retval) {
1323                 com_err(program_name, retval,
1324                         _("while trying to determine hardware sector size"));
1325                 exit(1);
1326         }
1327
1328         if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL)
1329                 sector_size = atoi(tmp);
1330
1331         set_fs_defaults(fs_type, &param, blocksize, sector_size, &inode_ratio);
1332         blocksize = EXT2_BLOCK_SIZE(&param);
1333
1334         if (extended_opts)
1335                 parse_extended_opts(&param, extended_opts);
1336
1337         /* Since sparse_super is the default, we would only have a problem
1338          * here if it was explicitly disabled.
1339          */
1340         if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
1341             !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) {
1342                 com_err(program_name, 0,
1343                         _("reserved online resize blocks not supported "
1344                           "on non-sparse filesystem"));
1345                 exit(1);
1346         }
1347
1348         if (param.s_blocks_per_group) {
1349                 if (param.s_blocks_per_group < 256 ||
1350                     param.s_blocks_per_group > 8 * (unsigned) blocksize) {
1351                         com_err(program_name, 0,
1352                                 _("blocks per group count out of range"));
1353                         exit(1);
1354                 }
1355         }
1356
1357         if (inode_size) {
1358                 if (inode_size < EXT2_GOOD_OLD_INODE_SIZE ||
1359                     inode_size > EXT2_BLOCK_SIZE(&param) ||
1360                     inode_size & (inode_size - 1)) {
1361                         com_err(program_name, 0,
1362                                 _("bad inode size %d (min %d/max %d)"),
1363                                 inode_size, EXT2_GOOD_OLD_INODE_SIZE,
1364                                 blocksize);
1365                         exit(1);
1366                 }
1367                 if (inode_size != EXT2_GOOD_OLD_INODE_SIZE)
1368                         fprintf(stderr, _("Warning: %d-byte inodes not usable "
1369                                 "on most systems\n"),
1370                                 inode_size);
1371                 param.s_inode_size = inode_size;
1372         }
1373
1374         /*
1375          * Calculate number of inodes based on the inode ratio
1376          */
1377         param.s_inodes_count = num_inodes ? num_inodes :
1378                 ((__u64) param.s_blocks_count * blocksize)
1379                         / inode_ratio;
1380
1381         /*
1382          * Calculate number of blocks to reserve
1383          */
1384         param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
1385 }
1386
1387 int main (int argc, char *argv[])
1388 {
1389         errcode_t       retval = 0;
1390         ext2_filsys     fs;
1391         badblocks_list  bb_list = 0;
1392         int             journal_blocks;
1393         unsigned int    i;
1394         int             val;
1395         io_manager      io_ptr;
1396
1397 #ifdef ENABLE_NLS
1398         setlocale(LC_MESSAGES, "");
1399         setlocale(LC_CTYPE, "");
1400         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1401         textdomain(NLS_CAT_NAME);
1402 #endif
1403         PRS(argc, argv);
1404
1405 #ifdef CONFIG_TESTIO_DEBUG
1406         io_ptr = test_io_manager;
1407         test_io_backing_manager = unix_io_manager;
1408 #else
1409         io_ptr = unix_io_manager;
1410 #endif
1411
1412         /*
1413          * Initialize the superblock....
1414          */
1415         retval = ext2fs_initialize(device_name, 0, &param,
1416                                    io_ptr, &fs);
1417         if (retval) {
1418                 com_err(device_name, retval, _("while setting up superblock"));
1419                 exit(1);
1420         }
1421
1422         /*
1423          * Wipe out the old on-disk superblock
1424          */
1425         if (!noaction)
1426                 zap_sector(fs, 2, 6);
1427
1428         /*
1429          * Generate a UUID for it...
1430          */
1431         uuid_generate(fs->super->s_uuid);
1432
1433         /*
1434          * Initialize the directory index variables
1435          */
1436         fs->super->s_def_hash_version = EXT2_HASH_TEA;
1437         uuid_generate((unsigned char *) fs->super->s_hash_seed);
1438
1439         /*
1440          * Add "jitter" to the superblock's check interval so that we
1441          * don't check all the filesystems at the same time.  We use a
1442          * kludgy hack of using the UUID to derive a random jitter value.
1443          */
1444         for (i = 0, val = 0 ; i < sizeof(fs->super->s_uuid); i++)
1445                 val += fs->super->s_uuid[i];
1446         fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT;
1447
1448         /*
1449          * Override the creator OS, if applicable
1450          */
1451         if (creator_os && !set_os(fs->super, creator_os)) {
1452                 com_err (program_name, 0, _("unknown os - %s"), creator_os);
1453                 exit(1);
1454         }
1455
1456         /*
1457          * For the Hurd, we will turn off filetype since it doesn't
1458          * support it.
1459          */
1460         if (fs->super->s_creator_os == EXT2_OS_HURD)
1461                 fs->super->s_feature_incompat &=
1462                         ~EXT2_FEATURE_INCOMPAT_FILETYPE;
1463
1464         /*
1465          * Set the volume label...
1466          */
1467         if (volume_label) {
1468                 memset(fs->super->s_volume_name, 0,
1469                        sizeof(fs->super->s_volume_name));
1470                 strncpy(fs->super->s_volume_name, volume_label,
1471                         sizeof(fs->super->s_volume_name));
1472         }
1473
1474         /*
1475          * Set the last mount directory
1476          */
1477         if (mount_dir) {
1478                 memset(fs->super->s_last_mounted, 0,
1479                        sizeof(fs->super->s_last_mounted));
1480                 strncpy(fs->super->s_last_mounted, mount_dir,
1481                         sizeof(fs->super->s_last_mounted));
1482         }
1483
1484         if (!quiet || noaction)
1485                 show_stats(fs);
1486
1487         if (noaction)
1488                 exit(0);
1489
1490         if (fs->super->s_feature_incompat &
1491             EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
1492                 create_journal_dev(fs);
1493                 exit(ext2fs_close(fs) ? 1 : 0);
1494         }
1495
1496         if (bad_blocks_filename)
1497                 read_bb_file(fs, &bb_list, bad_blocks_filename);
1498         if (cflag)
1499                 test_disk(fs, &bb_list);
1500
1501         handle_bad_blocks(fs, bb_list);
1502         fs->stride = fs_stride;
1503         retval = ext2fs_allocate_tables(fs);
1504         if (retval) {
1505                 com_err(program_name, retval,
1506                         _("while trying to allocate filesystem tables"));
1507                 exit(1);
1508         }
1509         if (super_only) {
1510                 fs->super->s_state |= EXT2_ERROR_FS;
1511                 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1512         } else {
1513                 /* rsv must be a power of two (64kB is MD RAID sb alignment) */
1514                 unsigned int rsv = 65536 / fs->blocksize;
1515                 unsigned long blocks = fs->super->s_blocks_count;
1516                 unsigned long start;
1517                 blk_t ret_blk;
1518
1519 #ifdef ZAP_BOOTBLOCK
1520                 zap_sector(fs, 0, 2);
1521 #endif
1522
1523                 /*
1524                  * Wipe out any old MD RAID (or other) metadata at the end
1525                  * of the device.  This will also verify that the device is
1526                  * as large as we think.  Be careful with very small devices.
1527                  */
1528                 start = (blocks & ~(rsv - 1));
1529                 if (start > rsv)
1530                         start -= rsv;
1531                 if (start > 0)
1532                         retval = zero_blocks(fs, start, blocks - start,
1533                                              NULL, &ret_blk, NULL);
1534
1535                 if (retval) {
1536                         com_err(program_name, retval,
1537                                 _("while zeroing block %u at end of filesystem"),
1538                                 ret_blk);
1539                 }
1540                 write_inode_tables(fs);
1541                 create_root_dir(fs);
1542                 create_lost_and_found(fs);
1543                 reserve_inodes(fs);
1544                 create_bad_block_inode(fs, bb_list);
1545                 retval = ext2fs_create_resize_inode(fs);
1546                 if (retval) {
1547                         com_err("ext2fs_create_resize_inode", retval,
1548                                 _("while reserving blocks for online resize"));
1549                         exit(1);
1550                 }
1551         }
1552
1553         if (journal_device) {
1554                 ext2_filsys     jfs;
1555
1556                 if (!force)
1557                         check_plausibility(journal_device);
1558                 check_mount(journal_device, force, _("journal"));
1559
1560                 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
1561                                      EXT2_FLAG_JOURNAL_DEV_OK, 0,
1562                                      fs->blocksize, unix_io_manager, &jfs);
1563                 if (retval) {
1564                         com_err(program_name, retval,
1565                                 _("while trying to open journal device %s\n"),
1566                                 journal_device);
1567                         exit(1);
1568                 }
1569                 if (!quiet) {
1570                         printf(_("Adding journal to device %s: "),
1571                                journal_device);
1572                         fflush(stdout);
1573                 }
1574                 retval = ext2fs_add_journal_device(fs, jfs);
1575                 if(retval) {
1576                         com_err (program_name, retval,
1577                                  _("\n\twhile trying to add journal to device %s"),
1578                                  journal_device);
1579                         exit(1);
1580                 }
1581                 if (!quiet)
1582                         printf(_("done\n"));
1583                 ext2fs_close(jfs);
1584                 free(journal_device);
1585         } else if (journal_size) {
1586                 journal_blocks = figure_journal_size(journal_size, fs);
1587
1588                 if (!journal_blocks) {
1589                         fs->super->s_feature_compat &=
1590                                 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1591                         goto no_journal;
1592                 }
1593                 if (!quiet) {
1594                         printf(_("Creating journal (%d blocks): "),
1595                                journal_blocks);
1596                         fflush(stdout);
1597                 }
1598                 retval = ext2fs_add_journal_inode(fs, journal_blocks,
1599                                                   journal_flags);
1600                 if (retval) {
1601                         com_err (program_name, retval,
1602                                  _("\n\twhile trying to create journal"));
1603                         exit(1);
1604                 }
1605                 if (!quiet)
1606                         printf(_("done\n"));
1607         }
1608 no_journal:
1609
1610         if (!quiet)
1611                 printf(_("Writing superblocks and "
1612                        "filesystem accounting information: "));
1613         retval = ext2fs_flush(fs);
1614         if (retval) {
1615                 fprintf(stderr,
1616                         _("\nWarning, had trouble writing out superblocks."));
1617         }
1618         if (!quiet) {
1619                 printf(_("done\n\n"));
1620                 if (!getenv("MKE2FS_SKIP_CHECK_MSG"))
1621                         print_check_message(fs);
1622         }
1623         val = ext2fs_close(fs);
1624         return (retval || val) ? 1 : 0;
1625 }