misc/mke2fs.c

   1 /*
   2  * mke2fs.c - Make a ext2fs filesystem.
   3  *
   4  * Copyright (C) 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  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 <termios.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 #endif
  30 #ifdef HAVE_UNISTD_H
  31 #include <unistd.h>
  32 #endif
  33 #ifdef HAVE_STDLIB_H
  34 #include <stdlib.h>
  35 #endif
  36 #ifdef HAVE_ERRNO_H
  37 #include <errno.h>
  38 #endif
  39 #ifdef HAVE_MNTENT_H
  40 #include <mntent.h>
  41 #endif
  42 #include <sys/ioctl.h>
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45
  46 #ifdef HAVE_LINUX_FS_H
  47 #include <linux/fs.h>
  48 #endif
  49 #include <linux/ext2_fs.h>
  50 #ifdef HAVE_LINUX_MAJOR_H
  51 #include <linux/major.h>
  52 #endif
  53
  54 #include "et/com_err.h"
  55 #include "uuid/uuid.h"
  56 #include "ext2fs/ext2fs.h"
  57 #include "../version.h"
  58
  59 /* Everything is STDC, these days */
  60 #define NOARGS void
  61
  62 #define STRIDE_LENGTH 8
  63
  64 #ifndef sparc
  65 #define ZAP_BOOTBLOCK
  66 #endif
  67
  68 extern int isatty(int);
  69 extern FILE *fpopen(const char *cmd, const char *mode);
  70
  71 const char * program_name = "mke2fs";
  72 const char * device_name = NULL;
  73
  74 /* Command line options */
  75 int     cflag = 0;
  76 int     verbose = 0;
  77 int     quiet = 0;
  78 int     super_only = 0;
  79 int     force = 0;
  80 int     noaction = 0;
  81 char    *bad_blocks_filename = 0;
  82 __u32   fs_stride = 0;
  83
  84 struct ext2_super_block param;
  85 char *creator_os = NULL;
  86 char *volume_label = NULL;
  87 char *mount_dir = NULL;
  88
  89 static void usage(NOARGS), check_plausibility(NOARGS), check_mount(NOARGS);
  90
  91 static void usage(NOARGS)
  92 {
  93         fprintf(stderr, "Usage: %s [-c|-t|-l filename] [-b block-size] "
  94         "[-f fragment-size]\n\t[-i bytes-per-inode] "
  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] [-r fs-revision]\n\t[-R raid_opts]"
  98         "[-s sparse-super-flag] [-qvSV] device [blocks-count]\n",
  99                 program_name);
 100         exit(1);
 101 }
 102
 103 static 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 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 void proceed_question(NOARGS)
 125 {
 126         fflush(stdout);
 127         fflush(stderr);
 128         printf("Proceed anyway? (y,n) ");
 129         if (getchar() != 'y')
 130                 exit(1);
 131 }
 132
 133 #ifndef SCSI_BLK_MAJOR
 134 #define SCSI_BLK_MAJOR(M)  ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
 135 #endif
 136
 137 static void check_plausibility(NOARGS)
 138 {
 139 #ifdef HAVE_LINUX_MAJOR_H
 140         int val;
 141         struct stat s;
 142
 143         val = stat(device_name, &s);
 144
 145         if(val == -1) {
 146                 fprintf(stderr, "Could not stat %s --- %s\n",
 147                         device_name, error_message(errno));
 148                 if (errno == ENOENT)
 149                         fprintf(stderr, "\nThe device apparently does "
 150                                "not exist; did you specify it correctly?\n");
 151                 exit(1);
 152         }
 153         if(!S_ISBLK(s.st_mode)) {
 154                 printf("%s is not a block special device.\n", device_name);
 155                 proceed_question();
 156                 return;
 157         } else if ((MAJOR(s.st_rdev) == HD_MAJOR &&
 158                     MINOR(s.st_rdev)%64 == 0) ||
 159                    (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
 160                        MINOR(s.st_rdev)%16 == 0)) {
 161                 printf("%s is entire device, not just one partition!\n",
 162                        device_name);
 163                 proceed_question();
 164         }
 165 #endif
 166 }
 167
 168 static void check_mount(NOARGS)
 169 {
 170         errcode_t       retval;
 171         int             mount_flags;
 172
 173         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 174         if (retval) {
 175                 com_err("ext2fs_check_if_mount", retval,
 176                         "while determining whether %s is mounted.",
 177                         device_name);
 178                 return;
 179         }
 180         if (!(mount_flags & EXT2_MF_MOUNTED))
 181                 return;
 182
 183         fprintf(stderr, "%s is mounted; ", device_name);
 184         if (force) {
 185                 fprintf(stderr, "mke2fs forced anyway.  "
 186                         "Hope /etc/mtab is incorrect.\n");
 187         } else {
 188                 fprintf(stderr, "will not make a filesystem here!\n");
 189                 exit(1);
 190         }
 191 }
 192
 193 /*
 194  * This function sets the default parameters for a filesystem
 195  *
 196  * The type is specified by the user.  The size is the maximum size
 197  * (in megabytes) for which a set of parameters applies, with a size
 198  * of zero meaning that it is the default parameter for the type.
 199  * Note that order is important in the table below.
 200  */
 201 static char default_str[] = "default";
 202 struct mke2fs_defaults {
 203         char    *type;
 204         int     size;
 205         int     blocksize;
 206         int     inode_ratio;
 207 } settings[] = {
 208         { default_str, 0, 4096, 8192 },
 209         { default_str, 512, 1024, 4096 },
 210         { default_str, 3, 1024, 8192 },
 211         { "news", 0, 4096, 4096 },
 212         { 0, 0, 0, 0},
 213 };
 214
 215 static void set_fs_defaults(char *fs_type, struct ext2fs_sb *param,
 216                             int blocksize, int *inode_ratio)
 217 {
 218         int     megs;
 219         int     ratio = 0;
 220         struct mke2fs_defaults *p;
 221
 222         megs = (param->s_blocks_count * (EXT2_BLOCK_SIZE(param) / 1024) /
 223                 1024);
 224         if (inode_ratio)
 225                 ratio = *inode_ratio;
 226         if (!fs_type)
 227                 fs_type = default_str;
 228         for (p = settings; p->type; p++) {
 229                 if ((strcmp(p->type, fs_type) != 0) &&
 230                     (strcmp(p->type, default_str) != 0))
 231                         continue;
 232                 if ((p->size != 0) &&
 233                     (megs > p->size))
 234                         continue;
 235                 if (ratio == 0)
 236                         *inode_ratio = p->inode_ratio;
 237                 if (blocksize == 0) {
 238                         param->s_log_frag_size = param->s_log_block_size =
 239                                 log2(p->blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
 240                 }
 241         }
 242         if (blocksize == 0)
 243                 param->s_blocks_count /= EXT2_BLOCK_SIZE(param) / 1024;
 244 }
 245
 246 /*
 247  * Helper function for read_bb_file and test_disk
 248  */
 249 static void invalid_block(ext2_filsys fs, blk_t blk)
 250 {
 251         printf("Bad block %u out of range; ignored.\n", blk);
 252         return;
 253 }
 254
 255 /*
 256  * Reads the bad blocks list from a file
 257  */
 258 static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
 259                          const char *bad_blocks_file)
 260 {
 261         FILE            *f;
 262         errcode_t       retval;
 263
 264         f = fopen(bad_blocks_file, "r");
 265         if (!f) {
 266                 com_err("read_bad_blocks_file", errno,
 267                         "while trying to open %s", bad_blocks_file);
 268                 exit(1);
 269         }
 270         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 271         fclose (f);
 272         if (retval) {
 273                 com_err("ext2fs_read_bb_FILE", retval,
 274                         "while reading in list of bad blocks from file");
 275                 exit(1);
 276         }
 277 }
 278
 279 /*
 280  * Runs the badblocks program to test the disk
 281  */
 282 static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
 283 {
 284         FILE            *f;
 285         errcode_t       retval;
 286         char            buf[1024];
 287
 288         sprintf(buf, "badblocks -b %d %s%s %d", fs->blocksize,
 289                 quiet ? "" : "-s ", fs->device_name,
 290                 fs->super->s_blocks_count);
 291         if (verbose)
 292                 printf("Running command: %s\n", buf);
 293         f = popen(buf, "r");
 294         if (!f) {
 295                 com_err("popen", errno,
 296                         "while trying run '%s'", buf);
 297                 exit(1);
 298         }
 299         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 300         pclose(f);
 301         if (retval) {
 302                 com_err("ext2fs_read_bb_FILE", retval,
 303                         "while processing list of bad blocks from program");
 304                 exit(1);
 305         }
 306 }
 307
 308 static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
 309 {
 310         int                     i, j;
 311         int                     must_be_good;
 312         blk_t                   blk;
 313         badblocks_iterate       bb_iter;
 314         errcode_t               retval;
 315         blk_t                   group_block;
 316         int                     group;
 317         int                     group_bad;
 318
 319         if (!bb_list)
 320                 return;
 321
 322         /*
 323          * The primary superblock and group descriptors *must* be
 324          * good; if not, abort.
 325          */
 326         must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
 327         for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
 328                 if (badblocks_list_test(bb_list, i)) {
 329                         fprintf(stderr, "Block %d in primary superblock/group "
 330                                 "descriptor area bad.\n", i);
 331                         fprintf(stderr, "Blocks %d through %d must be good "
 332                                 "in order to build a filesystem.\n",
 333                                 fs->super->s_first_data_block, must_be_good);
 334                         fprintf(stderr, "Aborting....\n");
 335                         exit(1);
 336                 }
 337         }
 338
 339         /*
 340          * See if any of the bad blocks are showing up in the backup
 341          * superblocks and/or group descriptors.  If so, issue a
 342          * warning and adjust the block counts appropriately.
 343          */
 344         group_block = fs->super->s_first_data_block +
 345                 fs->super->s_blocks_per_group;
 346
 347         for (i = 1; i < fs->group_desc_count; i++) {
 348                 group_bad = 0;
 349                 for (j=0; j < fs->desc_blocks+1; j++) {
 350                         if (badblocks_list_test(bb_list, group_block +
 351                                                 j)) {
 352                                 if (!group_bad)
 353                                         fprintf(stderr,
 354 "Warning: the backup superblock/group descriptors at block %d contain\n"
 355 "       bad blocks.\n\n",
 356                                                 group_block);
 357                                 group_bad++;
 358                                 group = ext2fs_group_of_blk(fs, group_block+j);
 359                                 fs->group_desc[group].bg_free_blocks_count++;
 360                                 fs->super->s_free_blocks_count++;
 361                         }
 362                 }
 363                 group_block += fs->super->s_blocks_per_group;
 364         }
 365
 366         /*
 367          * Mark all the bad blocks as used...
 368          */
 369         retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
 370         if (retval) {
 371                 com_err("badblocks_list_iterate_begin", retval,
 372                         "while marking bad blocks as used");
 373                 exit(1);
 374         }
 375         while (badblocks_list_iterate(bb_iter, &blk))
 376                 ext2fs_mark_block_bitmap(fs->block_map, blk);
 377         badblocks_list_iterate_end(bb_iter);
 378 }
 379
 380 static void write_inode_tables(ext2_filsys fs)
 381 {
 382         errcode_t       retval;
 383         blk_t           blk;
 384         int             i, j, num, count;
 385         char            *buf;
 386         char            format[20], backup[80];
 387         int             sync_kludge = 0;
 388         char            *mke2fs_sync;
 389
 390         mke2fs_sync = getenv("MKE2FS_SYNC");
 391         if (mke2fs_sync)
 392                 sync_kludge = atoi(mke2fs_sync);
 393
 394         buf = malloc(fs->blocksize * STRIDE_LENGTH);
 395         if (!buf) {
 396                 com_err("malloc", ENOMEM, "while allocating zeroizing buffer");
 397                 exit(1);
 398         }
 399         memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
 400
 401         /*
 402          * Figure out how many digits we need
 403          */
 404         i = log10(fs->group_desc_count);
 405         sprintf(format, "%%%dd/%%%dld", i, i);
 406         memset(backup, '\b', sizeof(backup)-1);
 407         backup[sizeof(backup)-1] = 0;
 408         if ((2*i)+1 < sizeof(backup))
 409                 backup[(2*i)+1] = 0;
 410
 411         if (!quiet)
 412                 printf("Writing inode tables: ");
 413         for (i = 0; i < fs->group_desc_count; i++) {
 414                 if (!quiet)
 415                         printf(format, i, fs->group_desc_count);
 416
 417                 blk = fs->group_desc[i].bg_inode_table;
 418                 num = fs->inode_blocks_per_group;
 419
 420                 for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
 421                         if (num-j > STRIDE_LENGTH)
 422                                 count = STRIDE_LENGTH;
 423                         else
 424                                 count = num - j;
 425                         retval = io_channel_write_blk(fs->io, blk, count, buf);
 426                         if (retval)
 427                                 printf("Warning: could not write %d blocks "
 428                                        "in inode table starting at %d: %s\n",
 429                                        count, blk, error_message(retval));
 430                 }
 431                 if (!quiet)
 432                         fputs(backup, stdout);
 433                 if (sync_kludge) {
 434                         if (sync_kludge == 1)
 435                                 sync();
 436                         else if ((i % sync_kludge) == 0)
 437                                 sync();
 438                 }
 439         }
 440         free(buf);
 441         if (!quiet)
 442                 fputs("done                            \n", stdout);
 443 }
 444
 445 static void create_root_dir(ext2_filsys fs)
 446 {
 447         errcode_t       retval;
 448         struct ext2_inode       inode;
 449
 450         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
 451         if (retval) {
 452                 com_err("ext2fs_mkdir", retval, "while creating root dir");
 453                 exit(1);
 454         }
 455         if (geteuid()) {
 456                 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
 457                 if (retval) {
 458                         com_err("ext2fs_read_inode", retval,
 459                                 "while reading root inode");
 460                         exit(1);
 461                 }
 462                 inode.i_uid = getuid();
 463                 if (inode.i_uid)
 464                         inode.i_gid = getgid();
 465                 retval = ext2fs_write_inode(fs, EXT2_ROOT_INO, &inode);
 466                 if (retval) {
 467                         com_err("ext2fs_write_inode", retval,
 468                                 "while setting root inode ownership");
 469                         exit(1);
 470                 }
 471         }
 472 }
 473
 474 static void create_lost_and_found(ext2_filsys fs)
 475 {
 476         errcode_t               retval;
 477         ino_t                   ino;
 478         const char              *name = "lost+found";
 479         int                     i;
 480         int                     lpf_size = 0;
 481
 482         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
 483         if (retval) {
 484                 com_err("ext2fs_mkdir", retval, "while creating /lost+found");
 485                 exit(1);
 486         }
 487
 488         retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
 489         if (retval) {
 490                 com_err("ext2_lookup", retval, "while looking up /lost+found");
 491                 exit(1);
 492         }
 493
 494         for (i=1; i < EXT2_NDIR_BLOCKS; i++) {
 495                 if ((lpf_size += fs->blocksize) >= 16*1024)
 496                         break;
 497                 retval = ext2fs_expand_dir(fs, ino);
 498                 if (retval) {
 499                         com_err("ext2fs_expand_dir", retval,
 500                                 "while expanding /lost+found");
 501                         exit(1);
 502                 }
 503         }
 504 }
 505
 506 static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
 507 {
 508         errcode_t       retval;
 509
 510         ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
 511         fs->group_desc[0].bg_free_inodes_count--;
 512         fs->super->s_free_inodes_count--;
 513         retval = ext2fs_update_bb_inode(fs, bb_list);
 514         if (retval) {
 515                 com_err("ext2fs_update_bb_inode", retval,
 516                         "while setting bad block inode");
 517                 exit(1);
 518         }
 519
 520 }
 521
 522 static void reserve_inodes(ext2_filsys fs)
 523 {
 524         ino_t   i;
 525         int     group;
 526
 527         for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
 528                 ext2fs_mark_inode_bitmap(fs->inode_map, i);
 529                 group = ext2fs_group_of_ino(fs, i);
 530                 fs->group_desc[group].bg_free_inodes_count--;
 531                 fs->super->s_free_inodes_count--;
 532         }
 533         ext2fs_mark_ib_dirty(fs);
 534 }
 535
 536 #ifdef ZAP_BOOTBLOCK
 537 static void zap_bootblock(ext2_filsys fs)
 538 {
 539         char buf[512];
 540         int retval;
 541
 542         memset(buf, 0, 512);
 543
 544         retval = io_channel_write_blk(fs->io, 0, -512, buf);
 545         if (retval)
 546                 printf("Warning: could not erase block 0: %s\n",
 547                        error_message(retval));
 548 }
 549 #endif
 550
 551
 552 static void show_stats(ext2_filsys fs)
 553 {
 554         struct ext2fs_sb        *s = (struct ext2fs_sb *) fs->super;
 555         char                    buf[80];
 556         blk_t                   group_block;
 557         int                     i, need, col_left;
 558
 559         if (param.s_blocks_count != s->s_blocks_count)
 560                 printf("warning: %d blocks unused.\n\n",
 561                        param.s_blocks_count - s->s_blocks_count);
 562
 563         memset(buf, 0, sizeof(buf));
 564         strncpy(buf, s->s_volume_name, sizeof(s->s_volume_name));
 565         printf("Filesystem label=%s\n", buf);
 566         printf("OS type: ");
 567         switch (fs->super->s_creator_os) {
 568             case EXT2_OS_LINUX: printf ("Linux"); break;
 569             case EXT2_OS_HURD:  printf ("GNU/hurd");   break;
 570             case EXT2_OS_MASIX: printf ("Masix"); break;
 571             default:            printf ("(unknown os)");
 572         }
 573         printf("\n");
 574         printf("Block size=%u (log=%u)\n", fs->blocksize,
 575                 s->s_log_block_size);
 576         printf("Fragment size=%u (log=%u)\n", fs->fragsize,
 577                 s->s_log_frag_size);
 578         printf("%u inodes, %u blocks\n", s->s_inodes_count,
 579                s->s_blocks_count);
 580         printf("%u blocks (%2.2f%%) reserved for the super user\n",
 581                 s->s_r_blocks_count,
 582                100.0 * s->s_r_blocks_count / s->s_blocks_count);
 583         printf("First data block=%u\n", s->s_first_data_block);
 584         printf("%lu block group%s\n", fs->group_desc_count,
 585                 (fs->group_desc_count > 1) ? "s" : "");
 586         printf("%u blocks per group, %u fragments per group\n",
 587                s->s_blocks_per_group, s->s_frags_per_group);
 588         printf("%u inodes per group\n", s->s_inodes_per_group);
 589
 590         if (fs->group_desc_count == 1) {
 591                 printf("\n");
 592                 return;
 593         }
 594
 595         printf("Superblock backups stored on blocks: ");
 596         group_block = s->s_first_data_block;
 597         col_left = 0;
 598         for (i = 1; i < fs->group_desc_count; i++) {
 599                 group_block += s->s_blocks_per_group;
 600                 if (!ext2fs_bg_has_super(fs, i))
 601                         continue;
 602                 need = log10(group_block) + 2;
 603                 if (need > col_left) {
 604                         printf("\n\t");
 605                         col_left = 72;
 606                 }
 607                 col_left -= need;
 608                 printf("%u", group_block);
 609                 if (i != fs->group_desc_count - 1)
 610                         printf(", ");
 611         }
 612         printf("\n\n");
 613 }
 614
 615 #ifndef HAVE_STRCASECMP
 616 static int strcasecmp (char *s1, char *s2)
 617 {
 618         while (*s1 && *s2) {
 619                 int ch1 = *s1++, ch2 = *s2++;
 620                 if (isupper (ch1))
 621                         ch1 = tolower (ch1);
 622                 if (isupper (ch2))
 623                         ch2 = tolower (ch2);
 624                 if (ch1 != ch2)
 625                         return ch1 - ch2;
 626         }
 627         return *s1 ? 1 : *s2 ? -1 : 0;
 628 }
 629 #endif
 630
 631 /*
 632  * Set the S_CREATOR_OS field.  Return true if OS is known,
 633  * otherwise, 0.
 634  */
 635 static int set_os(struct ext2_super_block *sb, char *os)
 636 {
 637         if (isdigit (*os))
 638                 sb->s_creator_os = atoi (os);
 639         else if (strcasecmp(os, "linux") == 0)
 640                 sb->s_creator_os = EXT2_OS_LINUX;
 641         else if (strcasecmp(os, "GNU") == 0 || strcasecmp(os, "hurd") == 0)
 642                 sb->s_creator_os = EXT2_OS_HURD;
 643         else if (strcasecmp(os, "masix") == 0)
 644                 sb->s_creator_os = EXT2_OS_MASIX;
 645         else
 646                 return 0;
 647         return 1;
 648 }
 649
 650 #define PATH_SET "PATH=/sbin"
 651
 652 static void parse_raid_opts(const char *opts)
 653 {
 654         char    *buf, *token, *next, *p, *arg;
 655         int     len;
 656         int     raid_usage = 0;
 657
 658         len = strlen(opts);
 659         buf = malloc(len+1);
 660         if (!buf) {
 661                 fprintf(stderr, "Couldn't allocate memory to parse "
 662                         "raid options!\n");
 663                 exit(1);
 664         }
 665         strcpy(buf, opts);
 666         for (token = buf; token && *token; token = next) {
 667                 p = strchr(token, ',');
 668                 next = 0;
 669                 if (p) {
 670                         *p = 0;
 671                         next = p+1;
 672                 }
 673                 arg = strchr(token, '=');
 674                 if (arg) {
 675                         *arg = 0;
 676                         arg++;
 677                 }
 678                 if (strcmp(token, "stride") == 0) {
 679                         if (!arg) {
 680                                 raid_usage++;
 681                                 continue;
 682                         }
 683                         fs_stride = strtoul(arg, &p, 0);
 684                         if (*p || (fs_stride == 0)) {
 685                                 fprintf(stderr, "Invalid stride parameter.\n");
 686                                 raid_usage++;
 687                                 continue;
 688                         }
 689                 } else
 690                         raid_usage++;
 691         }
 692         if (raid_usage) {
 693                 fprintf(stderr, "\nBad raid options specified.\n\n"
 694                         "Raid options are separated by commas, "
 695                         "and may take an argument which\n"
 696                         "\tis set off by an equals ('=') sign.\n\n"
 697                         "Valid raid options are:\n"
 698                         "\tstride=<stride length in blocks>\n\n");
 699                 exit(1);
 700         }
 701 }
 702
 703
 704
 705 static void PRS(int argc, char *argv[])
 706 {
 707         int     c;
 708         int     size;
 709         char    * tmp;
 710         blk_t   max = 8192;
 711         int     blocksize = 0;
 712         int     inode_ratio = 0;
 713         int     reserved_ratio = 5;
 714         ino_t   num_inodes = 0;
 715         errcode_t       retval;
 716         int     sparse_option = 1;
 717         char    *oldpath = getenv("PATH");
 718         struct ext2fs_sb *param_ext2 = (struct ext2fs_sb *) &param;
 719         char    *raid_opts = 0;
 720         char    *fs_type = 0;
 721         blk_t   dev_size;
 722 #ifdef linux
 723         struct utsname ut;
 724
 725         if (uname(&ut)) {
 726                 perror("uname");
 727                 exit(1);
 728         }
 729         if (ut.release[0] == '2' && ut.release[1] == '.' &&
 730             ut.release[2] < '2' && ut.release[3] == '.')
 731                 sparse_option = 0;
 732 #endif
 733         /* Update our PATH to include /sbin  */
 734         if (oldpath) {
 735                 char *newpath;
 736
 737                 newpath = malloc(sizeof (PATH_SET) + 1 + strlen (oldpath));
 738                 strcpy (newpath, PATH_SET);
 739                 strcat (newpath, ":");
 740                 strcat (newpath, oldpath);
 741                 putenv (newpath);
 742         } else
 743                 putenv (PATH_SET);
 744
 745         setbuf(stdout, NULL);
 746         setbuf(stderr, NULL);
 747         initialize_ext2_error_table();
 748         memset(&param, 0, sizeof(struct ext2_super_block));
 749         param.s_rev_level = 1;  /* Create revision 1 filesystems now */
 750
 751         fprintf (stderr, "mke2fs %s, %s for EXT2 FS %s, %s\n",
 752                  E2FSPROGS_VERSION, E2FSPROGS_DATE,
 753                  EXT2FS_VERSION, EXT2FS_DATE);
 754         if (argc && *argv)
 755                 program_name = *argv;
 756         while ((c = getopt (argc, argv,
 757                             "b:cf:g:i:l:m:no:qr:R:s:tvI:ST:FL:M:N:V")) != EOF)
 758                 switch (c) {
 759                 case 'b':
 760                         blocksize = strtoul(optarg, &tmp, 0);
 761                         if (blocksize < 1024 || blocksize > 4096 || *tmp) {
 762                                 com_err(program_name, 0, "bad block size - %s",
 763                                         optarg);
 764                                 exit(1);
 765                         }
 766                         param.s_log_block_size =
 767                                 log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
 768                         max = blocksize * 8;
 769                         break;
 770                 case 'c':
 771                 case 't':       /* Check for bad blocks */
 772                         cflag = 1;
 773                         break;
 774                 case 'f':
 775                         size = strtoul(optarg, &tmp, 0);
 776                         if (size < 1024 || size > 4096 || *tmp) {
 777                                 com_err(program_name, 0, "bad fragment size - %s",
 778                                         optarg);
 779                                 exit(1);
 780                         }
 781                         param.s_log_frag_size =
 782                                 log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
 783                         printf("Warning: fragments not supported.  "
 784                                "Ignoring -f option\n");
 785                         break;
 786                 case 'g':
 787                         param.s_blocks_per_group = strtoul(optarg, &tmp, 0);
 788                         if (*tmp) {
 789                                 com_err(program_name, 0,
 790                                         "Illegal number for blocks per group");
 791                                 exit(1);
 792                         }
 793                         if ((param.s_blocks_per_group % 8) != 0) {
 794                                 com_err(program_name, 0,
 795                                 "blocks per group must be multiple of 8");
 796                                 exit(1);
 797                         }
 798                         break;
 799                 case 'i':
 800                         inode_ratio = strtoul(optarg, &tmp, 0);
 801                         if (inode_ratio < 1024 || inode_ratio > 256 * 1024 ||
 802                             *tmp) {
 803                                 com_err(program_name, 0, "bad inode ratio - %s",
 804                                         optarg);
 805                                 exit(1);
 806                         }
 807                         break;
 808                 case 'l':
 809                         bad_blocks_filename = malloc(strlen(optarg)+1);
 810                         if (!bad_blocks_filename) {
 811                                 com_err(program_name, ENOMEM,
 812                                         "in malloc for bad_blocks_filename");
 813                                 exit(1);
 814                         }
 815                         strcpy(bad_blocks_filename, optarg);
 816                         break;
 817                 case 'm':
 818                         reserved_ratio = strtoul(optarg, &tmp, 0);
 819                         if (reserved_ratio > 50 || *tmp) {
 820                                 com_err(program_name, 0,
 821                                         "bad reserved blocks percent - %s",
 822                                         optarg);
 823                                 exit(1);
 824                         }
 825                         break;
 826                 case 'n':
 827                         noaction++;
 828                         break;
 829                 case 'o':
 830                         creator_os = optarg;
 831                         break;
 832                 case 'r':
 833                         param.s_rev_level = atoi(optarg);
 834                         break;
 835                 case 's':
 836                         sparse_option = atoi(optarg);
 837                         break;
 838 #ifdef EXT2_DYNAMIC_REV
 839                 case 'I':
 840                         param.s_inode_size = atoi(optarg);
 841                         break;
 842 #endif
 843                 case 'N':
 844                         num_inodes = atoi(optarg);
 845                         break;
 846                 case 'v':
 847                         verbose = 1;
 848                         break;
 849                 case 'q':
 850                         quiet = 1;
 851                         break;
 852                 case 'F':
 853                         force = 1;
 854                         break;
 855                 case 'L':
 856                         volume_label = optarg;
 857                         break;
 858                 case 'M':
 859                         mount_dir = optarg;
 860                         break;
 861                 case 'R':
 862                         raid_opts = optarg;
 863                         break;
 864                 case 'S':
 865                         super_only = 1;
 866                         break;
 867                 case 'T':
 868                         fs_type = optarg;
 869                         break;
 870                 case 'V':
 871                         /* Print version number and exit */
 872                         fprintf(stderr, "\tUsing %s\n",
 873                                 error_message(EXT2_ET_BASE));
 874                         exit(0);
 875                 default:
 876                         usage();
 877                 }
 878         if (optind == argc)
 879                 usage();
 880         device_name = argv[optind];
 881         optind++;
 882         if (optind < argc) {
 883                 param.s_blocks_count = strtoul(argv[optind++], &tmp, 0);
 884                 if (*tmp) {
 885                         com_err(program_name, 0, "bad blocks count - %s",
 886                                 argv[optind - 1]);
 887                         exit(1);
 888                 }
 889         }
 890         if (optind < argc)
 891                 usage();
 892
 893         if (raid_opts)
 894                 parse_raid_opts(raid_opts);
 895
 896         if (!force)
 897                 check_plausibility();
 898         check_mount();
 899
 900         param.s_log_frag_size = param.s_log_block_size;
 901
 902         if (noaction && param.s_blocks_count) {
 903                 dev_size = param.s_blocks_count;
 904                 retval = 0;
 905         } else
 906                 retval = ext2fs_get_device_size(device_name,
 907                                                 EXT2_BLOCK_SIZE(&param),
 908                                                 &dev_size);
 909         if (retval && (retval != EXT2_ET_UNIMPLEMENTED)) {
 910                 com_err(program_name, retval,
 911                         "while trying to determine filesystem size");
 912                 exit(1);
 913         }
 914         if (!param.s_blocks_count) {
 915                 if (retval == EXT2_ET_UNIMPLEMENTED) {
 916                         com_err(program_name, 0,
 917                                 "Couldn't determine device size; you "
 918                                 "must specify\nthe size of the "
 919                                 "filesystem\n");
 920                         exit(1);
 921                 } else
 922                         param.s_blocks_count = dev_size;
 923         } else if (!force && (param.s_blocks_count > dev_size)) {
 924                 com_err(program_name, 0,
 925                         "Filesystem larger than apparent filesystem size.");
 926                 proceed_question();
 927         }
 928
 929         set_fs_defaults(fs_type, param_ext2, blocksize, &inode_ratio);
 930
 931         if (param.s_blocks_per_group) {
 932                 if (param.s_blocks_per_group < 256 ||
 933                     param.s_blocks_per_group > max || *tmp) {
 934                         com_err(program_name, 0,
 935                                 "blocks per group count out of range");
 936                         exit(1);
 937                 }
 938         }
 939
 940         /*
 941          * Calculate number of inodes based on the inode ratio
 942          */
 943         param.s_inodes_count = num_inodes ? num_inodes :
 944                 ((long long) param.s_blocks_count * EXT2_BLOCK_SIZE(&param))
 945                         / inode_ratio;
 946
 947         /*
 948          * Calculate number of blocks to reserve
 949          */
 950         param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
 951
 952 #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 953         if (sparse_option)
 954                 param_ext2->s_feature_ro_compat |=
 955                         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 956 #endif
 957 }
 958
 959 int main (int argc, char *argv[])
 960 {
 961         errcode_t       retval = 0;
 962         ext2_filsys     fs;
 963         badblocks_list  bb_list = 0;
 964         struct ext2fs_sb *s;
 965
 966         PRS(argc, argv);
 967
 968         /*
 969          * Initialize the superblock....
 970          */
 971         retval = ext2fs_initialize(device_name, 0, &param,
 972                                    unix_io_manager, &fs);
 973         if (retval) {
 974                 com_err(device_name, retval, "while setting up superblock");
 975                 exit(1);
 976         }
 977
 978         /*
 979          * Generate a UUID for it...
 980          */
 981         s = (struct ext2fs_sb *) fs->super;
 982         uuid_generate(s->s_uuid);
 983
 984         /*
 985          * Override the creator OS, if applicable
 986          */
 987         if (creator_os && !set_os(fs->super, creator_os)) {
 988                 com_err (program_name, 0, "unknown os - %s", creator_os);
 989                 exit(1);
 990         }
 991
 992         /*
 993          * Set the volume label...
 994          */
 995         if (volume_label) {
 996                 memset(s->s_volume_name, 0, sizeof(s->s_volume_name));
 997                 strncpy(s->s_volume_name, volume_label,
 998                         sizeof(s->s_volume_name));
 999         }
1000
1001         /*
1002          * Set the last mount directory
1003          */
1004         if (mount_dir) {
1005                 memset(s->s_last_mounted, 0, sizeof(s->s_last_mounted));
1006                 strncpy(s->s_last_mounted, mount_dir,
1007                         sizeof(s->s_last_mounted));
1008         }
1009
1010         if (!quiet || noaction)
1011                 show_stats(fs);
1012
1013         if (noaction)
1014                 exit(0);
1015
1016         if (bad_blocks_filename)
1017                 read_bb_file(fs, &bb_list, bad_blocks_filename);
1018         if (cflag)
1019                 test_disk(fs, &bb_list);
1020
1021         handle_bad_blocks(fs, bb_list);
1022         fs->stride = fs_stride;
1023         retval = ext2fs_allocate_tables(fs);
1024         if (retval) {
1025                 com_err(program_name, retval,
1026                         "while trying to allocate filesystem tables");
1027                 exit(1);
1028         }
1029         if (super_only) {
1030                 fs->super->s_state |= EXT2_ERROR_FS;
1031                 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1032         } else {
1033                 write_inode_tables(fs);
1034                 create_root_dir(fs);
1035                 create_lost_and_found(fs);
1036                 reserve_inodes(fs);
1037                 create_bad_block_inode(fs, bb_list);
1038 #ifdef ZAP_BOOTBLOCK
1039                 zap_bootblock(fs);
1040 #endif
1041         }
1042
1043         if (!quiet)
1044                 printf("Writing superblocks and "
1045                        "filesystem accounting information: ");
1046         retval = ext2fs_flush(fs);
1047         if (retval) {
1048                 printf("\nWarning, had trouble writing out superblocks.");
1049         }
1050         if (!quiet)
1051                 printf("done\n");
1052         ext2fs_close(fs);
1053         return 0;
1054 }