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 <time.h>
  23 #ifdef linux
  24 #include <sys/utsname.h>
  25 #endif
  26 #ifdef HAVE_GETOPT_H
  27 #include <getopt.h>
  28 #endif
  29 #ifdef HAVE_UNISTD_H
  30 #include <unistd.h>
  31 #endif
  32 #ifdef HAVE_STDLIB_H
  33 #include <stdlib.h>
  34 #endif
  35 #ifdef HAVE_ERRNO_H
  36 #include <errno.h>
  37 #endif
  38 #ifdef HAVE_MNTENT_H
  39 #include <mntent.h>
  40 #endif
  41 #include <sys/ioctl.h>
  42 #include <sys/types.h>
  43
  44 #ifdef HAVE_LINUX_FS_H
  45 #include <linux/fs.h>
  46 #endif
  47 #include <linux/ext2_fs.h>
  48 #ifdef HAVE_LINUX_MAJOR_H
  49 #include <linux/major.h>
  50 #include <sys/stat.h>           /* Only need sys/stat.h for major nr test */
  51 #endif
  52
  53 #include "et/com_err.h"
  54 #include "uuid/uuid.h"
  55 #include "e2p/e2p.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] [-O feature[,...]]\n\t"
  98         "[-r fs-revision] [-R raid_opts] [-s sparse-super-flag]\n\t"
  99         "[-qvSV] device [blocks-count]\n",
 100                 program_name);
 101         exit(1);
 102 }
 103
 104 static int log2(int arg)
 105 {
 106         int     l = 0;
 107
 108         arg >>= 1;
 109         while (arg) {
 110                 l++;
 111                 arg >>= 1;
 112         }
 113         return l;
 114 }
 115
 116 static int log10(unsigned int arg)
 117 {
 118         int     l;
 119
 120         for (l=0; arg ; l++)
 121                 arg = arg / 10;
 122         return l;
 123 }
 124
 125 static void proceed_question(NOARGS)
 126 {
 127         fflush(stdout);
 128         fflush(stderr);
 129         printf("Proceed anyway? (y,n) ");
 130         if (getchar() != 'y')
 131                 exit(1);
 132 }
 133
 134 #ifndef SCSI_BLK_MAJOR
 135 #define SCSI_BLK_MAJOR(M)  ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
 136 #endif
 137
 138 static void check_plausibility(NOARGS)
 139 {
 140 #ifdef HAVE_LINUX_MAJOR_H
 141         int val;
 142         struct stat s;
 143
 144         val = stat(device_name, &s);
 145
 146         if(val == -1) {
 147                 fprintf(stderr, "Could not stat %s --- %s\n",
 148                         device_name, error_message(errno));
 149                 if (errno == ENOENT)
 150                         fprintf(stderr, "\nThe device apparently does "
 151                                "not exist; did you specify it correctly?\n");
 152                 exit(1);
 153         }
 154         if(!S_ISBLK(s.st_mode)) {
 155                 printf("%s is not a block special device.\n", device_name);
 156                 proceed_question();
 157                 return;
 158         } else if ((MAJOR(s.st_rdev) == HD_MAJOR &&
 159                     MINOR(s.st_rdev)%64 == 0) ||
 160                    (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
 161                        MINOR(s.st_rdev)%16 == 0)) {
 162                 printf("%s is entire device, not just one partition!\n",
 163                        device_name);
 164                 proceed_question();
 165         }
 166 #endif
 167 }
 168
 169 static void check_mount(NOARGS)
 170 {
 171         errcode_t       retval;
 172         int             mount_flags;
 173
 174         retval = ext2fs_check_if_mounted(device_name, &mount_flags);
 175         if (retval) {
 176                 com_err("ext2fs_check_if_mount", retval,
 177                         "while determining whether %s is mounted.",
 178                         device_name);
 179                 return;
 180         }
 181         if (!(mount_flags & EXT2_MF_MOUNTED))
 182                 return;
 183
 184         fprintf(stderr, "%s is mounted; ", device_name);
 185         if (force) {
 186                 fprintf(stderr, "mke2fs forced anyway.  "
 187                         "Hope /etc/mtab is incorrect.\n");
 188         } else {
 189                 fprintf(stderr, "will not make a filesystem here!\n");
 190                 exit(1);
 191         }
 192 }
 193
 194 /*
 195  * This function sets the default parameters for a filesystem
 196  *
 197  * The type is specified by the user.  The size is the maximum size
 198  * (in megabytes) for which a set of parameters applies, with a size
 199  * of zero meaning that it is the default parameter for the type.
 200  * Note that order is important in the table below.
 201  */
 202 static char default_str[] = "default";
 203 struct mke2fs_defaults {
 204         const char      *type;
 205         int             size;
 206         int             blocksize;
 207         int             inode_ratio;
 208 } settings[] = {
 209         { default_str, 0, 4096, 8192 },
 210         { default_str, 512, 1024, 4096 },
 211         { default_str, 3, 1024, 8192 },
 212         { "news", 0, 4096, 4096 },
 213         { 0, 0, 0, 0},
 214 };
 215
 216 static void set_fs_defaults(char *fs_type, struct ext2fs_sb *super,
 217                             int blocksize, int *inode_ratio)
 218 {
 219         int     megs;
 220         int     ratio = 0;
 221         struct mke2fs_defaults *p;
 222
 223         megs = (super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) /
 224                 1024);
 225         if (inode_ratio)
 226                 ratio = *inode_ratio;
 227         if (!fs_type)
 228                 fs_type = default_str;
 229         for (p = settings; p->type; p++) {
 230                 if ((strcmp(p->type, fs_type) != 0) &&
 231                     (strcmp(p->type, default_str) != 0))
 232                         continue;
 233                 if ((p->size != 0) &&
 234                     (megs > p->size))
 235                         continue;
 236                 if (ratio == 0)
 237                         *inode_ratio = p->inode_ratio;
 238                 if (blocksize == 0) {
 239                         super->s_log_frag_size = super->s_log_block_size =
 240                                 log2(p->blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
 241                 }
 242         }
 243         if (blocksize == 0)
 244                 super->s_blocks_count /= EXT2_BLOCK_SIZE(super) / 1024;
 245 }
 246
 247 /*
 248  * Helper function for read_bb_file and test_disk
 249  */
 250 static void invalid_block(ext2_filsys fs, blk_t blk)
 251 {
 252         printf("Bad block %u out of range; ignored.\n", blk);
 253         return;
 254 }
 255
 256 /*
 257  * Reads the bad blocks list from a file
 258  */
 259 static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list,
 260                          const char *bad_blocks_file)
 261 {
 262         FILE            *f;
 263         errcode_t       retval;
 264
 265         f = fopen(bad_blocks_file, "r");
 266         if (!f) {
 267                 com_err("read_bad_blocks_file", errno,
 268                         "while trying to open %s", bad_blocks_file);
 269                 exit(1);
 270         }
 271         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 272         fclose (f);
 273         if (retval) {
 274                 com_err("ext2fs_read_bb_FILE", retval,
 275                         "while reading in list of bad blocks from file");
 276                 exit(1);
 277         }
 278 }
 279
 280 /*
 281  * Runs the badblocks program to test the disk
 282  */
 283 static void test_disk(ext2_filsys fs, badblocks_list *bb_list)
 284 {
 285         FILE            *f;
 286         errcode_t       retval;
 287         char            buf[1024];
 288
 289         sprintf(buf, "badblocks -b %d %s%s %d", fs->blocksize,
 290                 quiet ? "" : "-s ", fs->device_name,
 291                 fs->super->s_blocks_count);
 292         if (verbose)
 293                 printf("Running command: %s\n", buf);
 294         f = popen(buf, "r");
 295         if (!f) {
 296                 com_err("popen", errno,
 297                         "while trying run '%s'", buf);
 298                 exit(1);
 299         }
 300         retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block);
 301         pclose(f);
 302         if (retval) {
 303                 com_err("ext2fs_read_bb_FILE", retval,
 304                         "while processing list of bad blocks from program");
 305                 exit(1);
 306         }
 307 }
 308
 309 static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list)
 310 {
 311         int                     i, j;
 312         int                     must_be_good;
 313         blk_t                   blk;
 314         badblocks_iterate       bb_iter;
 315         errcode_t               retval;
 316         blk_t                   group_block;
 317         int                     group;
 318         int                     group_bad;
 319
 320         if (!bb_list)
 321                 return;
 322
 323         /*
 324          * The primary superblock and group descriptors *must* be
 325          * good; if not, abort.
 326          */
 327         must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks;
 328         for (i = fs->super->s_first_data_block; i <= must_be_good; i++) {
 329                 if (badblocks_list_test(bb_list, i)) {
 330                         fprintf(stderr, "Block %d in primary superblock/group "
 331                                 "descriptor area bad.\n", i);
 332                         fprintf(stderr, "Blocks %d through %d must be good "
 333                                 "in order to build a filesystem.\n",
 334                                 fs->super->s_first_data_block, must_be_good);
 335                         fprintf(stderr, "Aborting....\n");
 336                         exit(1);
 337                 }
 338         }
 339
 340         /*
 341          * See if any of the bad blocks are showing up in the backup
 342          * superblocks and/or group descriptors.  If so, issue a
 343          * warning and adjust the block counts appropriately.
 344          */
 345         group_block = fs->super->s_first_data_block +
 346                 fs->super->s_blocks_per_group;
 347
 348         for (i = 1; i < fs->group_desc_count; i++) {
 349                 group_bad = 0;
 350                 for (j=0; j < fs->desc_blocks+1; j++) {
 351                         if (badblocks_list_test(bb_list, group_block +
 352                                                 j)) {
 353                                 if (!group_bad)
 354                                         fprintf(stderr,
 355 "Warning: the backup superblock/group descriptors at block %d contain\n"
 356 "       bad blocks.\n\n",
 357                                                 group_block);
 358                                 group_bad++;
 359                                 group = ext2fs_group_of_blk(fs, group_block+j);
 360                                 fs->group_desc[group].bg_free_blocks_count++;
 361                                 fs->super->s_free_blocks_count++;
 362                         }
 363                 }
 364                 group_block += fs->super->s_blocks_per_group;
 365         }
 366
 367         /*
 368          * Mark all the bad blocks as used...
 369          */
 370         retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
 371         if (retval) {
 372                 com_err("badblocks_list_iterate_begin", retval,
 373                         "while marking bad blocks as used");
 374                 exit(1);
 375         }
 376         while (badblocks_list_iterate(bb_iter, &blk))
 377                 ext2fs_mark_block_bitmap(fs->block_map, blk);
 378         badblocks_list_iterate_end(bb_iter);
 379 }
 380
 381 static void write_inode_tables(ext2_filsys fs)
 382 {
 383         errcode_t       retval;
 384         blk_t           blk;
 385         int             i, j, num, count;
 386         char            *buf;
 387         char            format[20], backup[80];
 388         int             sync_kludge = 0;
 389         char            *mke2fs_sync;
 390
 391         mke2fs_sync = getenv("MKE2FS_SYNC");
 392         if (mke2fs_sync)
 393                 sync_kludge = atoi(mke2fs_sync);
 394
 395         buf = malloc(fs->blocksize * STRIDE_LENGTH);
 396         if (!buf) {
 397                 com_err("malloc", ENOMEM, "while allocating zeroizing buffer");
 398                 exit(1);
 399         }
 400         memset(buf, 0, fs->blocksize * STRIDE_LENGTH);
 401
 402         /*
 403          * Figure out how many digits we need
 404          */
 405         i = log10(fs->group_desc_count);
 406         sprintf(format, "%%%dd/%%%dld", i, i);
 407         memset(backup, '\b', sizeof(backup)-1);
 408         backup[sizeof(backup)-1] = 0;
 409         if ((2*i)+1 < sizeof(backup))
 410                 backup[(2*i)+1] = 0;
 411
 412         if (!quiet)
 413                 printf("Writing inode tables: ");
 414         for (i = 0; i < fs->group_desc_count; i++) {
 415                 if (!quiet)
 416                         printf(format, i, fs->group_desc_count);
 417
 418                 blk = fs->group_desc[i].bg_inode_table;
 419                 num = fs->inode_blocks_per_group;
 420
 421                 for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) {
 422                         if (num-j > STRIDE_LENGTH)
 423                                 count = STRIDE_LENGTH;
 424                         else
 425                                 count = num - j;
 426                         retval = io_channel_write_blk(fs->io, blk, count, buf);
 427                         if (retval)
 428                                 printf("Warning: could not write %d blocks "
 429                                        "in inode table starting at %d: %s\n",
 430                                        count, blk, error_message(retval));
 431                 }
 432                 if (!quiet)
 433                         fputs(backup, stdout);
 434                 if (sync_kludge) {
 435                         if (sync_kludge == 1)
 436                                 sync();
 437                         else if ((i % sync_kludge) == 0)
 438                                 sync();
 439                 }
 440         }
 441         free(buf);
 442         if (!quiet)
 443                 fputs("done                            \n", stdout);
 444 }
 445
 446 static void create_root_dir(ext2_filsys fs)
 447 {
 448         errcode_t       retval;
 449         struct ext2_inode       inode;
 450
 451         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0);
 452         if (retval) {
 453                 com_err("ext2fs_mkdir", retval, "while creating root dir");
 454                 exit(1);
 455         }
 456         if (geteuid()) {
 457                 retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode);
 458                 if (retval) {
 459                         com_err("ext2fs_read_inode", retval,
 460                                 "while reading root inode");
 461                         exit(1);
 462                 }
 463                 inode.i_uid = getuid();
 464                 if (inode.i_uid)
 465                         inode.i_gid = getgid();
 466                 retval = ext2fs_write_inode(fs, EXT2_ROOT_INO, &inode);
 467                 if (retval) {
 468                         com_err("ext2fs_write_inode", retval,
 469                                 "while setting root inode ownership");
 470                         exit(1);
 471                 }
 472         }
 473 }
 474
 475 static void create_lost_and_found(ext2_filsys fs)
 476 {
 477         errcode_t               retval;
 478         ino_t                   ino;
 479         const char              *name = "lost+found";
 480         int                     i;
 481         int                     lpf_size = 0;
 482
 483         retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name);
 484         if (retval) {
 485                 com_err("ext2fs_mkdir", retval, "while creating /lost+found");
 486                 exit(1);
 487         }
 488
 489         retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino);
 490         if (retval) {
 491                 com_err("ext2_lookup", retval, "while looking up /lost+found");
 492                 exit(1);
 493         }
 494
 495         for (i=1; i < EXT2_NDIR_BLOCKS; i++) {
 496                 if ((lpf_size += fs->blocksize) >= 16*1024)
 497                         break;
 498                 retval = ext2fs_expand_dir(fs, ino);
 499                 if (retval) {
 500                         com_err("ext2fs_expand_dir", retval,
 501                                 "while expanding /lost+found");
 502                         exit(1);
 503                 }
 504         }
 505 }
 506
 507 static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list)
 508 {
 509         errcode_t       retval;
 510
 511         ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO);
 512         fs->group_desc[0].bg_free_inodes_count--;
 513         fs->super->s_free_inodes_count--;
 514         retval = ext2fs_update_bb_inode(fs, bb_list);
 515         if (retval) {
 516                 com_err("ext2fs_update_bb_inode", retval,
 517                         "while setting bad block inode");
 518                 exit(1);
 519         }
 520
 521 }
 522
 523 static void reserve_inodes(ext2_filsys fs)
 524 {
 525         ino_t   i;
 526         int     group;
 527
 528         for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) {
 529                 ext2fs_mark_inode_bitmap(fs->inode_map, i);
 530                 group = ext2fs_group_of_ino(fs, i);
 531                 fs->group_desc[group].bg_free_inodes_count--;
 532                 fs->super->s_free_inodes_count--;
 533         }
 534         ext2fs_mark_ib_dirty(fs);
 535 }
 536
 537 #ifdef ZAP_BOOTBLOCK
 538 static void zap_bootblock(ext2_filsys fs)
 539 {
 540         char buf[512];
 541         int retval;
 542
 543         memset(buf, 0, 512);
 544
 545         retval = io_channel_write_blk(fs->io, 0, -512, buf);
 546         if (retval)
 547                 printf("Warning: could not erase block 0: %s\n",
 548                        error_message(retval));
 549 }
 550 #endif
 551
 552
 553 static void show_stats(ext2_filsys fs)
 554 {
 555         struct ext2fs_sb        *s = (struct ext2fs_sb *) fs->super;
 556         char                    buf[80];
 557         blk_t                   group_block;
 558         int                     i, need, col_left;
 559
 560         if (param.s_blocks_count != s->s_blocks_count)
 561                 printf("warning: %d blocks unused.\n\n",
 562                        param.s_blocks_count - s->s_blocks_count);
 563
 564         memset(buf, 0, sizeof(buf));
 565         strncpy(buf, s->s_volume_name, sizeof(s->s_volume_name));
 566         printf("Filesystem label=%s\n", buf);
 567         printf("OS type: ");
 568         switch (fs->super->s_creator_os) {
 569             case EXT2_OS_LINUX: printf ("Linux"); break;
 570             case EXT2_OS_HURD:  printf ("GNU/Hurd");   break;
 571             case EXT2_OS_MASIX: printf ("Masix"); break;
 572             default:            printf ("(unknown os)");
 573         }
 574         printf("\n");
 575         printf("Block size=%u (log=%u)\n", fs->blocksize,
 576                 s->s_log_block_size);
 577         printf("Fragment size=%u (log=%u)\n", fs->fragsize,
 578                 s->s_log_frag_size);
 579         printf("%u inodes, %u blocks\n", s->s_inodes_count,
 580                s->s_blocks_count);
 581         printf("%u blocks (%2.2f%%) reserved for the super user\n",
 582                 s->s_r_blocks_count,
 583                100.0 * s->s_r_blocks_count / s->s_blocks_count);
 584         printf("First data block=%u\n", s->s_first_data_block);
 585         printf("%lu block group%s\n", fs->group_desc_count,
 586                 (fs->group_desc_count > 1) ? "s" : "");
 587         printf("%u blocks per group, %u fragments per group\n",
 588                s->s_blocks_per_group, s->s_frags_per_group);
 589         printf("%u inodes per group\n", s->s_inodes_per_group);
 590
 591         if (fs->group_desc_count == 1) {
 592                 printf("\n");
 593                 return;
 594         }
 595
 596         printf("Superblock backups stored on blocks: ");
 597         group_block = s->s_first_data_block;
 598         col_left = 0;
 599         for (i = 1; i < fs->group_desc_count; i++) {
 600                 group_block += s->s_blocks_per_group;
 601                 if (!ext2fs_bg_has_super(fs, i))
 602                         continue;
 603                 if (i != 1)
 604                         printf(", ");
 605                 need = log10(group_block) + 2;
 606                 if (need > col_left) {
 607                         printf("\n\t");
 608                         col_left = 72;
 609                 }
 610                 col_left -= need;
 611                 printf("%u", group_block);
 612         }
 613         printf("\n\n");
 614 }
 615
 616 #ifndef HAVE_STRCASECMP
 617 static int strcasecmp (char *s1, char *s2)
 618 {
 619         while (*s1 && *s2) {
 620                 int ch1 = *s1++, ch2 = *s2++;
 621                 if (isupper (ch1))
 622                         ch1 = tolower (ch1);
 623                 if (isupper (ch2))
 624                         ch2 = tolower (ch2);
 625                 if (ch1 != ch2)
 626                         return ch1 - ch2;
 627         }
 628         return *s1 ? 1 : *s2 ? -1 : 0;
 629 }
 630 #endif
 631
 632 /*
 633  * Set the S_CREATOR_OS field.  Return true if OS is known,
 634  * otherwise, 0.
 635  */
 636 static int set_os(struct ext2_super_block *sb, char *os)
 637 {
 638         if (isdigit (*os))
 639                 sb->s_creator_os = atoi (os);
 640         else if (strcasecmp(os, "linux") == 0)
 641                 sb->s_creator_os = EXT2_OS_LINUX;
 642         else if (strcasecmp(os, "GNU") == 0 || strcasecmp(os, "hurd") == 0)
 643                 sb->s_creator_os = EXT2_OS_HURD;
 644         else if (strcasecmp(os, "masix") == 0)
 645                 sb->s_creator_os = EXT2_OS_MASIX;
 646         else
 647                 return 0;
 648         return 1;
 649 }
 650
 651 #define PATH_SET "PATH=/sbin"
 652
 653 static void parse_raid_opts(const char *opts)
 654 {
 655         char    *buf, *token, *next, *p, *arg;
 656         int     len;
 657         int     raid_usage = 0;
 658
 659         len = strlen(opts);
 660         buf = malloc(len+1);
 661         if (!buf) {
 662                 fprintf(stderr, "Couldn't allocate memory to parse "
 663                         "raid options!\n");
 664                 exit(1);
 665         }
 666         strcpy(buf, opts);
 667         for (token = buf; token && *token; token = next) {
 668                 p = strchr(token, ',');
 669                 next = 0;
 670                 if (p) {
 671                         *p = 0;
 672                         next = p+1;
 673                 }
 674                 arg = strchr(token, '=');
 675                 if (arg) {
 676                         *arg = 0;
 677                         arg++;
 678                 }
 679                 if (strcmp(token, "stride") == 0) {
 680                         if (!arg) {
 681                                 raid_usage++;
 682                                 continue;
 683                         }
 684                         fs_stride = strtoul(arg, &p, 0);
 685                         if (*p || (fs_stride == 0)) {
 686                                 fprintf(stderr, "Invalid stride parameter.\n");
 687                                 raid_usage++;
 688                                 continue;
 689                         }
 690                 } else
 691                         raid_usage++;
 692         }
 693         if (raid_usage) {
 694                 fprintf(stderr, "\nBad raid options specified.\n\n"
 695                         "Raid options are separated by commas, "
 696                         "and may take an argument which\n"
 697                         "\tis set off by an equals ('=') sign.\n\n"
 698                         "Valid raid options are:\n"
 699                         "\tstride=<stride length in blocks>\n\n");
 700                 exit(1);
 701         }
 702 }
 703
 704 static __u32 ok_features[3] = {
 705         0,                                      /* Compat */
 706         EXT2_FEATURE_INCOMPAT_FILETYPE,         /* Incompat */
 707         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER     /* R/O compat */
 708 };
 709
 710
 711 static void PRS(int argc, char *argv[])
 712 {
 713         int             c;
 714         int             size;
 715         char *          tmp;
 716         blk_t           max = 8192;
 717         int             blocksize = 0;
 718         int             inode_ratio = 0;
 719         int             reserved_ratio = 5;
 720         ino_t           num_inodes = 0;
 721         errcode_t       retval;
 722         int             sparse_option = 0;
 723         char *          oldpath = getenv("PATH");
 724         struct ext2fs_sb *param_ext2 = (struct ext2fs_sb *) &param;
 725         char *          raid_opts = 0;
 726         char *          fs_type = 0;
 727         const char *    feature_set = "filetype,sparse_super";
 728         blk_t           dev_size;
 729 #ifdef linux
 730         struct          utsname ut;
 731
 732         if (uname(&ut)) {
 733                 perror("uname");
 734                 exit(1);
 735         }
 736         if ((ut.release[0] == '1') ||
 737             (ut.release[0] == '2' && ut.release[1] == '.' &&
 738              ut.release[2] < '2' && ut.release[3] == '.'))
 739                 feature_set = 0;
 740 #endif
 741         /* Update our PATH to include /sbin  */
 742         if (oldpath) {
 743                 char *newpath;
 744
 745                 newpath = malloc(sizeof (PATH_SET) + 1 + strlen (oldpath));
 746                 strcpy (newpath, PATH_SET);
 747                 strcat (newpath, ":");
 748                 strcat (newpath, oldpath);
 749                 putenv (newpath);
 750         } else
 751                 putenv (PATH_SET);
 752
 753         setbuf(stdout, NULL);
 754         setbuf(stderr, NULL);
 755         initialize_ext2_error_table();
 756         memset(&param, 0, sizeof(struct ext2_super_block));
 757         param.s_rev_level = 1;  /* Create revision 1 filesystems now */
 758
 759         fprintf (stderr, "mke2fs %s, %s for EXT2 FS %s, %s\n",
 760                  E2FSPROGS_VERSION, E2FSPROGS_DATE,
 761                  EXT2FS_VERSION, EXT2FS_DATE);
 762         if (argc && *argv)
 763                 program_name = *argv;
 764         while ((c = getopt (argc, argv,
 765                     "b:cf:g:i:l:m:no:qr:R:s:tvI:ST:FL:M:N:O:V")) != EOF)
 766                 switch (c) {
 767                 case 'b':
 768                         blocksize = strtoul(optarg, &tmp, 0);
 769                         if (blocksize < 1024 || blocksize > 4096 || *tmp) {
 770                                 com_err(program_name, 0, "bad block size - %s",
 771                                         optarg);
 772                                 exit(1);
 773                         }
 774                         param.s_log_block_size =
 775                                 log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE);
 776                         max = blocksize * 8;
 777                         break;
 778                 case 'c':
 779                 case 't':       /* Check for bad blocks */
 780                         cflag = 1;
 781                         break;
 782                 case 'f':
 783                         size = strtoul(optarg, &tmp, 0);
 784                         if (size < 1024 || size > 4096 || *tmp) {
 785                                 com_err(program_name, 0, "bad fragment size - %s",
 786                                         optarg);
 787                                 exit(1);
 788                         }
 789                         param.s_log_frag_size =
 790                                 log2(size >> EXT2_MIN_BLOCK_LOG_SIZE);
 791                         printf("Warning: fragments not supported.  "
 792                                "Ignoring -f option\n");
 793                         break;
 794                 case 'g':
 795                         param.s_blocks_per_group = strtoul(optarg, &tmp, 0);
 796                         if (*tmp) {
 797                                 com_err(program_name, 0,
 798                                         "Illegal number for blocks per group");
 799                                 exit(1);
 800                         }
 801                         if ((param.s_blocks_per_group % 8) != 0) {
 802                                 com_err(program_name, 0,
 803                                 "blocks per group must be multiple of 8");
 804                                 exit(1);
 805                         }
 806                         break;
 807                 case 'i':
 808                         inode_ratio = strtoul(optarg, &tmp, 0);
 809                         if (inode_ratio < 1024 || inode_ratio > 256 * 1024 ||
 810                             *tmp) {
 811                                 com_err(program_name, 0, "bad inode ratio - %s",
 812                                         optarg);
 813                                 exit(1);
 814                         }
 815                         break;
 816                 case 'l':
 817                         bad_blocks_filename = malloc(strlen(optarg)+1);
 818                         if (!bad_blocks_filename) {
 819                                 com_err(program_name, ENOMEM,
 820                                         "in malloc for bad_blocks_filename");
 821                                 exit(1);
 822                         }
 823                         strcpy(bad_blocks_filename, optarg);
 824                         break;
 825                 case 'm':
 826                         reserved_ratio = strtoul(optarg, &tmp, 0);
 827                         if (reserved_ratio > 50 || *tmp) {
 828                                 com_err(program_name, 0,
 829                                         "bad reserved blocks percent - %s",
 830                                         optarg);
 831                                 exit(1);
 832                         }
 833                         break;
 834                 case 'n':
 835                         noaction++;
 836                         break;
 837                 case 'o':
 838                         creator_os = optarg;
 839                         break;
 840                 case 'r':
 841                         param.s_rev_level = atoi(optarg);
 842                         break;
 843                 case 's':
 844                         sparse_option = atoi(optarg);
 845                         break;
 846 #ifdef EXT2_DYNAMIC_REV
 847                 case 'I':
 848                         param.s_inode_size = atoi(optarg);
 849                         break;
 850 #endif
 851                 case 'N':
 852                         num_inodes = atoi(optarg);
 853                         break;
 854                 case 'v':
 855                         verbose = 1;
 856                         break;
 857                 case 'q':
 858                         quiet = 1;
 859                         break;
 860                 case 'F':
 861                         force = 1;
 862                         break;
 863                 case 'L':
 864                         volume_label = optarg;
 865                         break;
 866                 case 'M':
 867                         mount_dir = optarg;
 868                         break;
 869                 case 'O':
 870                         feature_set = optarg;
 871                         break;
 872                 case 'R':
 873                         raid_opts = optarg;
 874                         break;
 875                 case 'S':
 876                         super_only = 1;
 877                         break;
 878                 case 'T':
 879                         fs_type = optarg;
 880                         break;
 881                 case 'V':
 882                         /* Print version number and exit */
 883                         fprintf(stderr, "\tUsing %s\n",
 884                                 error_message(EXT2_ET_BASE));
 885                         exit(0);
 886                 default:
 887                         usage();
 888                 }
 889         if (optind == argc)
 890                 usage();
 891         device_name = argv[optind];
 892         optind++;
 893         if (optind < argc) {
 894                 param.s_blocks_count = strtoul(argv[optind++], &tmp, 0);
 895                 if (*tmp) {
 896                         com_err(program_name, 0, "bad blocks count - %s",
 897                                 argv[optind - 1]);
 898                         exit(1);
 899                 }
 900         }
 901         if (optind < argc)
 902                 usage();
 903
 904         if (raid_opts)
 905                 parse_raid_opts(raid_opts);
 906
 907         if (!force)
 908                 check_plausibility();
 909         check_mount();
 910
 911         param.s_log_frag_size = param.s_log_block_size;
 912
 913         if (noaction && param.s_blocks_count) {
 914                 dev_size = param.s_blocks_count;
 915                 retval = 0;
 916         } else
 917                 retval = ext2fs_get_device_size(device_name,
 918                                                 EXT2_BLOCK_SIZE(&param),
 919                                                 &dev_size);
 920         if (retval && (retval != EXT2_ET_UNIMPLEMENTED)) {
 921                 com_err(program_name, retval,
 922                         "while trying to determine filesystem size");
 923                 exit(1);
 924         }
 925         if (!param.s_blocks_count) {
 926                 if (retval == EXT2_ET_UNIMPLEMENTED) {
 927                         com_err(program_name, 0,
 928                                 "Couldn't determine device size; you "
 929                                 "must specify\nthe size of the "
 930                                 "filesystem\n");
 931                         exit(1);
 932                 } else
 933                         param.s_blocks_count = dev_size;
 934         } else if (!force && (param.s_blocks_count > dev_size)) {
 935                 com_err(program_name, 0,
 936                         "Filesystem larger than apparent filesystem size.");
 937                 proceed_question();
 938         }
 939
 940         set_fs_defaults(fs_type, param_ext2, blocksize, &inode_ratio);
 941
 942         if (param.s_blocks_per_group) {
 943                 if (param.s_blocks_per_group < 256 ||
 944                     param.s_blocks_per_group > max || *tmp) {
 945                         com_err(program_name, 0,
 946                                 "blocks per group count out of range");
 947                         exit(1);
 948                 }
 949         }
 950
 951         /*
 952          * Calculate number of inodes based on the inode ratio
 953          */
 954         param.s_inodes_count = num_inodes ? num_inodes :
 955                 ((__u64) param.s_blocks_count * EXT2_BLOCK_SIZE(&param))
 956                         / inode_ratio;
 957
 958         /*
 959          * Calculate number of blocks to reserve
 960          */
 961         param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100;
 962
 963 #ifdef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
 964         if (sparse_option)
 965                 param_ext2->s_feature_ro_compat |=
 966                         EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER;
 967 #endif
 968         if (feature_set && !strncasecmp(feature_set, "none", 4))
 969                 feature_set = 0;
 970         if (feature_set && e2p_edit_feature(feature_set,
 971                                             &param_ext2->s_feature_compat,
 972                                             ok_features)) {
 973                 fprintf(stderr, "Invalid filesystem option set: %s\n",
 974                         feature_set);
 975                 exit(1);
 976         }
 977 }
 978
 979 int main (int argc, char *argv[])
 980 {
 981         errcode_t       retval = 0;
 982         ext2_filsys     fs;
 983         badblocks_list  bb_list = 0;
 984         struct ext2fs_sb *s;
 985
 986         PRS(argc, argv);
 987
 988         /*
 989          * Initialize the superblock....
 990          */
 991         retval = ext2fs_initialize(device_name, 0, &param,
 992                                    unix_io_manager, &fs);
 993         if (retval) {
 994                 com_err(device_name, retval, "while setting up superblock");
 995                 exit(1);
 996         }
 997
 998         /*
 999          * Generate a UUID for it...
1000          */
1001         s = (struct ext2fs_sb *) fs->super;
1002         uuid_generate(s->s_uuid);
1003
1004         /*
1005          * Override the creator OS, if applicable
1006          */
1007         if (creator_os && !set_os(fs->super, creator_os)) {
1008                 com_err (program_name, 0, "unknown os - %s", creator_os);
1009                 exit(1);
1010         }
1011
1012         /*
1013          * Set the volume label...
1014          */
1015         if (volume_label) {
1016                 memset(s->s_volume_name, 0, sizeof(s->s_volume_name));
1017                 strncpy(s->s_volume_name, volume_label,
1018                         sizeof(s->s_volume_name));
1019         }
1020
1021         /*
1022          * Set the last mount directory
1023          */
1024         if (mount_dir) {
1025                 memset(s->s_last_mounted, 0, sizeof(s->s_last_mounted));
1026                 strncpy(s->s_last_mounted, mount_dir,
1027                         sizeof(s->s_last_mounted));
1028         }
1029
1030         if (!quiet || noaction)
1031                 show_stats(fs);
1032
1033         if (noaction)
1034                 exit(0);
1035
1036         if (bad_blocks_filename)
1037                 read_bb_file(fs, &bb_list, bad_blocks_filename);
1038         if (cflag)
1039                 test_disk(fs, &bb_list);
1040
1041         handle_bad_blocks(fs, bb_list);
1042         fs->stride = fs_stride;
1043         retval = ext2fs_allocate_tables(fs);
1044         if (retval) {
1045                 com_err(program_name, retval,
1046                         "while trying to allocate filesystem tables");
1047                 exit(1);
1048         }
1049         if (super_only) {
1050                 fs->super->s_state |= EXT2_ERROR_FS;
1051                 fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY);
1052         } else {
1053                 write_inode_tables(fs);
1054                 create_root_dir(fs);
1055                 create_lost_and_found(fs);
1056                 reserve_inodes(fs);
1057                 create_bad_block_inode(fs, bb_list);
1058 #ifdef ZAP_BOOTBLOCK
1059                 zap_bootblock(fs);
1060 #endif
1061         }
1062
1063         if (!quiet)
1064                 printf("Writing superblocks and "
1065                        "filesystem accounting information: ");
1066         retval = ext2fs_flush(fs);
1067         if (retval) {
1068                 printf("\nWarning, had trouble writing out superblocks.");
1069         }
1070         if (!quiet)
1071                 printf("done\n");
1072         ext2fs_close(fs);
1073         return 0;
1074 }