[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * mkfs.c - make a linux (minix) file-system.
|
---|
| 4 | *
|
---|
| 5 | * (C) 1991 Linus Torvalds. This file may be redistributed as per
|
---|
| 6 | * the Linux copyright.
|
---|
| 7 | */
|
---|
| 8 |
|
---|
| 9 | /*
|
---|
| 10 | * DD.MM.YY
|
---|
| 11 | *
|
---|
| 12 | * 24.11.91 - Time began. Used the fsck sources to get started.
|
---|
| 13 | *
|
---|
| 14 | * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
|
---|
| 15 | * The algorithm for ".badblocks" is a bit weird, but
|
---|
| 16 | * it should work. Oh, well.
|
---|
| 17 | *
|
---|
| 18 | * 25.01.92 - Added the -l option for getting the list of bad blocks
|
---|
| 19 | * out of a named file. (Dave Rivers, rivers@ponds.uucp)
|
---|
| 20 | *
|
---|
| 21 | * 28.02.92 - Added %-information when using -c.
|
---|
| 22 | *
|
---|
| 23 | * 28.02.93 - Added support for other namelengths than the original
|
---|
| 24 | * 14 characters so that I can test the new kernel routines..
|
---|
| 25 | *
|
---|
| 26 | * 09.10.93 - Make exit status conform to that required by fsutil
|
---|
| 27 | * (Rik Faith, faith@cs.unc.edu)
|
---|
| 28 | *
|
---|
| 29 | * 31.10.93 - Added inode request feature, for backup floppies: use
|
---|
| 30 | * 32 inodes, for a news partition use more.
|
---|
| 31 | * (Scott Heavner, sdh@po.cwru.edu)
|
---|
| 32 | *
|
---|
| 33 | * 03.01.94 - Added support for file system valid flag.
|
---|
| 34 | * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
|
---|
| 35 | *
|
---|
| 36 | * 30.10.94 - added support for v2 filesystem
|
---|
| 37 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
|
---|
| 38 | *
|
---|
| 39 | * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
|
---|
| 40 | * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
|
---|
| 41 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
|
---|
| 42 | *
|
---|
| 43 | * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
|
---|
| 44 | * the filesystem is not misidentified as a MS-DOS FAT filesystem.
|
---|
| 45 | * (Daniel Quinlan, quinlan@yggdrasil.com)
|
---|
| 46 | *
|
---|
| 47 | * 02.07.96 - Added small patch from Russell King to make the program a
|
---|
| 48 | * good deal more portable (janl@math.uio.no)
|
---|
| 49 | *
|
---|
| 50 | * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
|
---|
| 51 | *
|
---|
| 52 | * -c for readability checking (SLOW!)
|
---|
| 53 | * -l for getting a list of bad blocks from a file.
|
---|
| 54 | * -n for namelength (currently the kernel only uses 14 or 30)
|
---|
| 55 | * -i for number of inodes
|
---|
| 56 | * -v for v2 filesystem
|
---|
| 57 | *
|
---|
| 58 | * The device may be a block device or a image of one, but this isn't
|
---|
| 59 | * enforced (but it's not much fun on a character device :-).
|
---|
| 60 | *
|
---|
| 61 | * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
|
---|
| 62 | * removed getopt based parser and added a hand rolled one.
|
---|
| 63 | */
|
---|
| 64 |
|
---|
| 65 | #include <stdio.h>
|
---|
| 66 | #include <time.h>
|
---|
| 67 | #include <unistd.h>
|
---|
| 68 | #include <string.h>
|
---|
| 69 | #include <signal.h>
|
---|
| 70 | #include <fcntl.h>
|
---|
| 71 | #include <ctype.h>
|
---|
| 72 | #include <stdlib.h>
|
---|
| 73 | #include <stdint.h>
|
---|
| 74 | #include <termios.h>
|
---|
| 75 | #include <sys/ioctl.h>
|
---|
| 76 | #include <sys/param.h>
|
---|
| 77 | #include <mntent.h>
|
---|
| 78 | #include "busybox.h"
|
---|
| 79 |
|
---|
| 80 | #define MINIX_ROOT_INO 1
|
---|
| 81 | #define MINIX_LINK_MAX 250
|
---|
| 82 | #define MINIX2_LINK_MAX 65530
|
---|
| 83 |
|
---|
| 84 | #define MINIX_I_MAP_SLOTS 8
|
---|
| 85 | #define MINIX_Z_MAP_SLOTS 64
|
---|
| 86 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
|
---|
| 87 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
|
---|
| 88 | #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
|
---|
| 89 | #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
|
---|
| 90 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */
|
---|
| 91 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
|
---|
| 92 |
|
---|
| 93 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
|
---|
| 94 | #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
|
---|
| 95 |
|
---|
| 96 | #define MINIX_V1 0x0001 /* original minix fs */
|
---|
| 97 | #define MINIX_V2 0x0002 /* minix V2 fs */
|
---|
| 98 |
|
---|
| 99 | #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
|
---|
| 100 |
|
---|
| 101 | /*
|
---|
| 102 | * This is the original minix inode layout on disk.
|
---|
| 103 | * Note the 8-bit gid and atime and ctime.
|
---|
| 104 | */
|
---|
| 105 | struct minix_inode {
|
---|
| 106 | uint16_t i_mode;
|
---|
| 107 | uint16_t i_uid;
|
---|
| 108 | uint32_t i_size;
|
---|
| 109 | uint32_t i_time;
|
---|
| 110 | uint8_t i_gid;
|
---|
| 111 | uint8_t i_nlinks;
|
---|
| 112 | uint16_t i_zone[9];
|
---|
| 113 | };
|
---|
| 114 |
|
---|
| 115 | /*
|
---|
| 116 | * The new minix inode has all the time entries, as well as
|
---|
| 117 | * long block numbers and a third indirect block (7+1+1+1
|
---|
| 118 | * instead of 7+1+1). Also, some previously 8-bit values are
|
---|
| 119 | * now 16-bit. The inode is now 64 bytes instead of 32.
|
---|
| 120 | */
|
---|
| 121 | struct minix2_inode {
|
---|
| 122 | uint16_t i_mode;
|
---|
| 123 | uint16_t i_nlinks;
|
---|
| 124 | uint16_t i_uid;
|
---|
| 125 | uint16_t i_gid;
|
---|
| 126 | uint32_t i_size;
|
---|
| 127 | uint32_t i_atime;
|
---|
| 128 | uint32_t i_mtime;
|
---|
| 129 | uint32_t i_ctime;
|
---|
| 130 | uint32_t i_zone[10];
|
---|
| 131 | };
|
---|
| 132 |
|
---|
| 133 | /*
|
---|
| 134 | * minix super-block data on disk
|
---|
| 135 | */
|
---|
| 136 | struct minix_super_block {
|
---|
| 137 | uint16_t s_ninodes;
|
---|
| 138 | uint16_t s_nzones;
|
---|
| 139 | uint16_t s_imap_blocks;
|
---|
| 140 | uint16_t s_zmap_blocks;
|
---|
| 141 | uint16_t s_firstdatazone;
|
---|
| 142 | uint16_t s_log_zone_size;
|
---|
| 143 | uint32_t s_max_size;
|
---|
| 144 | uint16_t s_magic;
|
---|
| 145 | uint16_t s_state;
|
---|
| 146 | uint32_t s_zones;
|
---|
| 147 | };
|
---|
| 148 |
|
---|
| 149 | struct minix_dir_entry {
|
---|
| 150 | uint16_t inode;
|
---|
| 151 | char name[0];
|
---|
| 152 | };
|
---|
| 153 |
|
---|
| 154 | #define NAME_MAX 255 /* # chars in a file name */
|
---|
| 155 |
|
---|
| 156 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
|
---|
| 157 |
|
---|
| 158 | #define MINIX_VALID_FS 0x0001 /* Clean fs. */
|
---|
| 159 | #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
|
---|
| 160 |
|
---|
| 161 | #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
|
---|
| 162 | #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
|
---|
| 163 |
|
---|
| 164 | #ifndef BLKGETSIZE
|
---|
| 165 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
|
---|
| 166 | #endif
|
---|
| 167 |
|
---|
| 168 |
|
---|
| 169 | #ifndef __linux__
|
---|
| 170 | #define volatile
|
---|
| 171 | #endif
|
---|
| 172 |
|
---|
| 173 | #define MINIX_ROOT_INO 1
|
---|
| 174 | #define MINIX_BAD_INO 2
|
---|
| 175 |
|
---|
| 176 | #define TEST_BUFFER_BLOCKS 16
|
---|
| 177 | #define MAX_GOOD_BLOCKS 512
|
---|
| 178 |
|
---|
| 179 | #define UPPER(size,n) (((size)+((n)-1))/(n))
|
---|
| 180 | #define INODE_SIZE (sizeof(struct minix_inode))
|
---|
| 181 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 182 | #define INODE_SIZE2 (sizeof(struct minix2_inode))
|
---|
| 183 | #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
|
---|
| 184 | : MINIX_INODES_PER_BLOCK))
|
---|
| 185 | #else
|
---|
| 186 | #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
|
---|
| 187 | #endif
|
---|
| 188 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
|
---|
| 189 |
|
---|
| 190 | #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
|
---|
| 191 |
|
---|
| 192 | static char *device_name;
|
---|
| 193 | static int DEV = -1;
|
---|
| 194 | static uint32_t BLOCKS;
|
---|
| 195 | static int check;
|
---|
| 196 | static int badblocks;
|
---|
| 197 | static int namelen = 30; /* default (changed to 30, per Linus's
|
---|
| 198 |
|
---|
| 199 | suggestion, Sun Nov 21 08:05:07 1993) */
|
---|
| 200 | static int dirsize = 32;
|
---|
| 201 | static int magic = MINIX_SUPER_MAGIC2;
|
---|
| 202 | static int version2;
|
---|
| 203 |
|
---|
| 204 | static char root_block[BLOCK_SIZE];
|
---|
| 205 |
|
---|
| 206 | static char *inode_buffer;
|
---|
| 207 |
|
---|
| 208 | #define Inode (((struct minix_inode *) inode_buffer)-1)
|
---|
| 209 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 210 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
|
---|
| 211 | #endif
|
---|
| 212 | static char super_block_buffer[BLOCK_SIZE];
|
---|
| 213 | static char boot_block_buffer[512];
|
---|
| 214 |
|
---|
| 215 | #define Super (*(struct minix_super_block *)super_block_buffer)
|
---|
| 216 | #define INODES (Super.s_ninodes)
|
---|
| 217 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 218 | #define ZONES (version2 ? Super.s_zones : Super.s_nzones)
|
---|
| 219 | #else
|
---|
| 220 | #define ZONES (Super.s_nzones)
|
---|
| 221 | #endif
|
---|
| 222 | #define IMAPS (Super.s_imap_blocks)
|
---|
| 223 | #define ZMAPS (Super.s_zmap_blocks)
|
---|
| 224 | #define FIRSTZONE (Super.s_firstdatazone)
|
---|
| 225 | #define ZONESIZE (Super.s_log_zone_size)
|
---|
| 226 | #define MAXSIZE (Super.s_max_size)
|
---|
| 227 | #define MAGIC (Super.s_magic)
|
---|
| 228 | #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
|
---|
| 229 |
|
---|
| 230 | static char *inode_map;
|
---|
| 231 | static char *zone_map;
|
---|
| 232 |
|
---|
| 233 | static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
|
---|
| 234 | static int used_good_blocks;
|
---|
| 235 | static unsigned long req_nr_inodes;
|
---|
| 236 |
|
---|
| 237 | static inline int bit(char * a,unsigned int i)
|
---|
| 238 | {
|
---|
| 239 | return (a[i >> 3] & (1<<(i & 7))) != 0;
|
---|
| 240 | }
|
---|
| 241 | #define inode_in_use(x) (bit(inode_map,(x)))
|
---|
| 242 | #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
|
---|
| 243 |
|
---|
| 244 | #define mark_inode(x) (setbit(inode_map,(x)))
|
---|
| 245 | #define unmark_inode(x) (clrbit(inode_map,(x)))
|
---|
| 246 |
|
---|
| 247 | #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
|
---|
| 248 | #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
|
---|
| 249 |
|
---|
| 250 | /*
|
---|
| 251 | * Check to make certain that our new filesystem won't be created on
|
---|
| 252 | * an already mounted partition. Code adapted from mke2fs, Copyright
|
---|
| 253 | * (C) 1994 Theodore Ts'o. Also licensed under GPL.
|
---|
| 254 | */
|
---|
| 255 | static inline void check_mount(void)
|
---|
| 256 | {
|
---|
| 257 | FILE *f;
|
---|
| 258 | struct mntent *mnt;
|
---|
| 259 |
|
---|
| 260 | if ((f = setmntent(MOUNTED, "r")) == NULL)
|
---|
| 261 | return;
|
---|
| 262 | while ((mnt = getmntent(f)) != NULL)
|
---|
| 263 | if (strcmp(device_name, mnt->mnt_fsname) == 0)
|
---|
| 264 | break;
|
---|
| 265 | endmntent(f);
|
---|
| 266 | if (!mnt)
|
---|
| 267 | return;
|
---|
| 268 |
|
---|
| 269 | bb_error_msg_and_die("%s is mounted; will not make a filesystem here!", device_name);
|
---|
| 270 | }
|
---|
| 271 |
|
---|
| 272 | static long valid_offset(int fd, int offset)
|
---|
| 273 | {
|
---|
| 274 | char ch;
|
---|
| 275 |
|
---|
| 276 | if (lseek(fd, offset, 0) < 0)
|
---|
| 277 | return 0;
|
---|
| 278 | if (read(fd, &ch, 1) < 1)
|
---|
| 279 | return 0;
|
---|
| 280 | return 1;
|
---|
| 281 | }
|
---|
| 282 |
|
---|
| 283 | static inline int count_blocks(int fd)
|
---|
| 284 | {
|
---|
| 285 | int high, low;
|
---|
| 286 |
|
---|
| 287 | low = 0;
|
---|
| 288 | for (high = 1; valid_offset(fd, high); high *= 2)
|
---|
| 289 | low = high;
|
---|
| 290 | while (low < high - 1) {
|
---|
| 291 | const int mid = (low + high) / 2;
|
---|
| 292 |
|
---|
| 293 | if (valid_offset(fd, mid))
|
---|
| 294 | low = mid;
|
---|
| 295 | else
|
---|
| 296 | high = mid;
|
---|
| 297 | }
|
---|
| 298 | valid_offset(fd, 0);
|
---|
| 299 | return (low + 1);
|
---|
| 300 | }
|
---|
| 301 |
|
---|
| 302 | static inline int get_size(const char *file)
|
---|
| 303 | {
|
---|
| 304 | int fd;
|
---|
| 305 | long size;
|
---|
| 306 |
|
---|
| 307 | fd = bb_xopen3(file, O_RDWR, 0);
|
---|
| 308 | if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
|
---|
| 309 | close(fd);
|
---|
| 310 | return (size * 512);
|
---|
| 311 | }
|
---|
| 312 |
|
---|
| 313 | size = count_blocks(fd);
|
---|
| 314 | close(fd);
|
---|
| 315 | return size;
|
---|
| 316 | }
|
---|
| 317 |
|
---|
| 318 | static inline void write_tables(void)
|
---|
| 319 | {
|
---|
| 320 | /* Mark the super block valid. */
|
---|
| 321 | Super.s_state |= MINIX_VALID_FS;
|
---|
| 322 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
| 323 |
|
---|
| 324 | if (lseek(DEV, 0, SEEK_SET))
|
---|
| 325 | bb_error_msg_and_die("seek to boot block failed in write_tables");
|
---|
| 326 | if (512 != write(DEV, boot_block_buffer, 512))
|
---|
| 327 | bb_error_msg_and_die("unable to clear boot sector");
|
---|
| 328 | if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET))
|
---|
| 329 | bb_error_msg_and_die("seek failed in write_tables");
|
---|
| 330 | if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE))
|
---|
| 331 | bb_error_msg_and_die("unable to write super-block");
|
---|
| 332 | if (IMAPS * BLOCK_SIZE != write(DEV, inode_map, IMAPS * BLOCK_SIZE))
|
---|
| 333 | bb_error_msg_and_die("unable to write inode map");
|
---|
| 334 | if (ZMAPS * BLOCK_SIZE != write(DEV, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
| 335 | bb_error_msg_and_die("unable to write zone map");
|
---|
| 336 | if (INODE_BUFFER_SIZE != write(DEV, inode_buffer, INODE_BUFFER_SIZE))
|
---|
| 337 | bb_error_msg_and_die("unable to write inodes");
|
---|
| 338 |
|
---|
| 339 | }
|
---|
| 340 |
|
---|
| 341 | static void write_block(int blk, char *buffer)
|
---|
| 342 | {
|
---|
| 343 | if (blk * BLOCK_SIZE != lseek(DEV, blk * BLOCK_SIZE, SEEK_SET))
|
---|
| 344 | bb_error_msg_and_die("seek failed in write_block");
|
---|
| 345 | if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE))
|
---|
| 346 | bb_error_msg_and_die("write failed in write_block");
|
---|
| 347 | }
|
---|
| 348 |
|
---|
| 349 | static int get_free_block(void)
|
---|
| 350 | {
|
---|
| 351 | int blk;
|
---|
| 352 |
|
---|
| 353 | if (used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
|
---|
| 354 | bb_error_msg_and_die("too many bad blocks");
|
---|
| 355 | if (used_good_blocks)
|
---|
| 356 | blk = good_blocks_table[used_good_blocks - 1] + 1;
|
---|
| 357 | else
|
---|
| 358 | blk = FIRSTZONE;
|
---|
| 359 | while (blk < ZONES && zone_in_use(blk))
|
---|
| 360 | blk++;
|
---|
| 361 | if (blk >= ZONES)
|
---|
| 362 | bb_error_msg_and_die("not enough good blocks");
|
---|
| 363 | good_blocks_table[used_good_blocks] = blk;
|
---|
| 364 | used_good_blocks++;
|
---|
| 365 | return blk;
|
---|
| 366 | }
|
---|
| 367 |
|
---|
| 368 | static inline void mark_good_blocks(void)
|
---|
| 369 | {
|
---|
| 370 | int blk;
|
---|
| 371 |
|
---|
| 372 | for (blk = 0; blk < used_good_blocks; blk++)
|
---|
| 373 | mark_zone(good_blocks_table[blk]);
|
---|
| 374 | }
|
---|
| 375 |
|
---|
| 376 | static int next(int zone)
|
---|
| 377 | {
|
---|
| 378 | if (!zone)
|
---|
| 379 | zone = FIRSTZONE - 1;
|
---|
| 380 | while (++zone < ZONES)
|
---|
| 381 | if (zone_in_use(zone))
|
---|
| 382 | return zone;
|
---|
| 383 | return 0;
|
---|
| 384 | }
|
---|
| 385 |
|
---|
| 386 | static inline void make_bad_inode(void)
|
---|
| 387 | {
|
---|
| 388 | struct minix_inode *inode = &Inode[MINIX_BAD_INO];
|
---|
| 389 | int i, j, zone;
|
---|
| 390 | int ind = 0, dind = 0;
|
---|
| 391 | unsigned short ind_block[BLOCK_SIZE >> 1];
|
---|
| 392 | unsigned short dind_block[BLOCK_SIZE >> 1];
|
---|
| 393 |
|
---|
| 394 | #define NEXT_BAD (zone = next(zone))
|
---|
| 395 |
|
---|
| 396 | if (!badblocks)
|
---|
| 397 | return;
|
---|
| 398 | mark_inode(MINIX_BAD_INO);
|
---|
| 399 | inode->i_nlinks = 1;
|
---|
| 400 | inode->i_time = time(NULL);
|
---|
| 401 | inode->i_mode = S_IFREG + 0000;
|
---|
| 402 | inode->i_size = badblocks * BLOCK_SIZE;
|
---|
| 403 | zone = next(0);
|
---|
| 404 | for (i = 0; i < 7; i++) {
|
---|
| 405 | inode->i_zone[i] = zone;
|
---|
| 406 | if (!NEXT_BAD)
|
---|
| 407 | goto end_bad;
|
---|
| 408 | }
|
---|
| 409 | inode->i_zone[7] = ind = get_free_block();
|
---|
| 410 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 411 | for (i = 0; i < 512; i++) {
|
---|
| 412 | ind_block[i] = zone;
|
---|
| 413 | if (!NEXT_BAD)
|
---|
| 414 | goto end_bad;
|
---|
| 415 | }
|
---|
| 416 | inode->i_zone[8] = dind = get_free_block();
|
---|
| 417 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
| 418 | for (i = 0; i < 512; i++) {
|
---|
| 419 | write_block(ind, (char *) ind_block);
|
---|
| 420 | dind_block[i] = ind = get_free_block();
|
---|
| 421 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 422 | for (j = 0; j < 512; j++) {
|
---|
| 423 | ind_block[j] = zone;
|
---|
| 424 | if (!NEXT_BAD)
|
---|
| 425 | goto end_bad;
|
---|
| 426 | }
|
---|
| 427 | }
|
---|
| 428 | bb_error_msg_and_die("too many bad blocks");
|
---|
| 429 | end_bad:
|
---|
| 430 | if (ind)
|
---|
| 431 | write_block(ind, (char *) ind_block);
|
---|
| 432 | if (dind)
|
---|
| 433 | write_block(dind, (char *) dind_block);
|
---|
| 434 | }
|
---|
| 435 |
|
---|
| 436 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 437 | static inline void make_bad_inode2(void)
|
---|
| 438 | {
|
---|
| 439 | struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
|
---|
| 440 | int i, j, zone;
|
---|
| 441 | int ind = 0, dind = 0;
|
---|
| 442 | unsigned long ind_block[BLOCK_SIZE >> 2];
|
---|
| 443 | unsigned long dind_block[BLOCK_SIZE >> 2];
|
---|
| 444 |
|
---|
| 445 | if (!badblocks)
|
---|
| 446 | return;
|
---|
| 447 | mark_inode(MINIX_BAD_INO);
|
---|
| 448 | inode->i_nlinks = 1;
|
---|
| 449 | inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
|
---|
| 450 | inode->i_mode = S_IFREG + 0000;
|
---|
| 451 | inode->i_size = badblocks * BLOCK_SIZE;
|
---|
| 452 | zone = next(0);
|
---|
| 453 | for (i = 0; i < 7; i++) {
|
---|
| 454 | inode->i_zone[i] = zone;
|
---|
| 455 | if (!NEXT_BAD)
|
---|
| 456 | goto end_bad;
|
---|
| 457 | }
|
---|
| 458 | inode->i_zone[7] = ind = get_free_block();
|
---|
| 459 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 460 | for (i = 0; i < 256; i++) {
|
---|
| 461 | ind_block[i] = zone;
|
---|
| 462 | if (!NEXT_BAD)
|
---|
| 463 | goto end_bad;
|
---|
| 464 | }
|
---|
| 465 | inode->i_zone[8] = dind = get_free_block();
|
---|
| 466 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
| 467 | for (i = 0; i < 256; i++) {
|
---|
| 468 | write_block(ind, (char *) ind_block);
|
---|
| 469 | dind_block[i] = ind = get_free_block();
|
---|
| 470 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 471 | for (j = 0; j < 256; j++) {
|
---|
| 472 | ind_block[j] = zone;
|
---|
| 473 | if (!NEXT_BAD)
|
---|
| 474 | goto end_bad;
|
---|
| 475 | }
|
---|
| 476 | }
|
---|
| 477 | /* Could make triple indirect block here */
|
---|
| 478 | bb_error_msg_and_die("too many bad blocks");
|
---|
| 479 | end_bad:
|
---|
| 480 | if (ind)
|
---|
| 481 | write_block(ind, (char *) ind_block);
|
---|
| 482 | if (dind)
|
---|
| 483 | write_block(dind, (char *) dind_block);
|
---|
| 484 | }
|
---|
| 485 | #endif
|
---|
| 486 |
|
---|
| 487 | static inline void make_root_inode(void)
|
---|
| 488 | {
|
---|
| 489 | struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
|
---|
| 490 |
|
---|
| 491 | mark_inode(MINIX_ROOT_INO);
|
---|
| 492 | inode->i_zone[0] = get_free_block();
|
---|
| 493 | inode->i_nlinks = 2;
|
---|
| 494 | inode->i_time = time(NULL);
|
---|
| 495 | if (badblocks)
|
---|
| 496 | inode->i_size = 3 * dirsize;
|
---|
| 497 | else {
|
---|
| 498 | root_block[2 * dirsize] = '\0';
|
---|
| 499 | root_block[2 * dirsize + 1] = '\0';
|
---|
| 500 | inode->i_size = 2 * dirsize;
|
---|
| 501 | }
|
---|
| 502 | inode->i_mode = S_IFDIR + 0755;
|
---|
| 503 | inode->i_uid = getuid();
|
---|
| 504 | if (inode->i_uid)
|
---|
| 505 | inode->i_gid = getgid();
|
---|
| 506 | write_block(inode->i_zone[0], root_block);
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 510 | static inline void make_root_inode2(void)
|
---|
| 511 | {
|
---|
| 512 | struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
|
---|
| 513 |
|
---|
| 514 | mark_inode(MINIX_ROOT_INO);
|
---|
| 515 | inode->i_zone[0] = get_free_block();
|
---|
| 516 | inode->i_nlinks = 2;
|
---|
| 517 | inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
|
---|
| 518 | if (badblocks)
|
---|
| 519 | inode->i_size = 3 * dirsize;
|
---|
| 520 | else {
|
---|
| 521 | root_block[2 * dirsize] = '\0';
|
---|
| 522 | root_block[2 * dirsize + 1] = '\0';
|
---|
| 523 | inode->i_size = 2 * dirsize;
|
---|
| 524 | }
|
---|
| 525 | inode->i_mode = S_IFDIR + 0755;
|
---|
| 526 | inode->i_uid = getuid();
|
---|
| 527 | if (inode->i_uid)
|
---|
| 528 | inode->i_gid = getgid();
|
---|
| 529 | write_block(inode->i_zone[0], root_block);
|
---|
| 530 | }
|
---|
| 531 | #endif
|
---|
| 532 |
|
---|
| 533 | static inline void setup_tables(void)
|
---|
| 534 | {
|
---|
| 535 | int i;
|
---|
| 536 | unsigned long inodes;
|
---|
| 537 |
|
---|
| 538 | memset(super_block_buffer, 0, BLOCK_SIZE);
|
---|
| 539 | memset(boot_block_buffer, 0, 512);
|
---|
| 540 | MAGIC = magic;
|
---|
| 541 | ZONESIZE = 0;
|
---|
| 542 | MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
---|
| 543 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 544 | if (version2) {
|
---|
| 545 | Super.s_zones = BLOCKS;
|
---|
| 546 | } else
|
---|
| 547 | #endif
|
---|
| 548 | Super.s_nzones = BLOCKS;
|
---|
| 549 |
|
---|
| 550 | /* some magic nrs: 1 inode / 3 blocks */
|
---|
| 551 | if (req_nr_inodes == 0)
|
---|
| 552 | inodes = BLOCKS / 3;
|
---|
| 553 | else
|
---|
| 554 | inodes = req_nr_inodes;
|
---|
| 555 | /* Round up inode count to fill block size */
|
---|
| 556 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 557 | if (version2)
|
---|
| 558 | inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
---|
| 559 | ~(MINIX2_INODES_PER_BLOCK - 1));
|
---|
| 560 | else
|
---|
| 561 | #endif
|
---|
| 562 | inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
|
---|
| 563 | ~(MINIX_INODES_PER_BLOCK - 1));
|
---|
| 564 | if (inodes > 65535)
|
---|
| 565 | inodes = 65535;
|
---|
| 566 | INODES = inodes;
|
---|
| 567 | IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
|
---|
| 568 | ZMAPS = 0;
|
---|
| 569 | i = 0;
|
---|
| 570 | while (ZMAPS !=
|
---|
| 571 | UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
---|
| 572 | BITS_PER_BLOCK) && i < 1000) {
|
---|
| 573 | ZMAPS =
|
---|
| 574 | UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
---|
| 575 | BITS_PER_BLOCK);
|
---|
| 576 | i++;
|
---|
| 577 | }
|
---|
| 578 | /* Real bad hack but overwise mkfs.minix can be thrown
|
---|
| 579 | * in infinite loop...
|
---|
| 580 | * try:
|
---|
| 581 | * dd if=/dev/zero of=test.fs count=10 bs=1024
|
---|
| 582 | * /sbin/mkfs.minix -i 200 test.fs
|
---|
| 583 | * */
|
---|
| 584 | if (i >= 999) {
|
---|
| 585 | bb_error_msg_and_die("unable to allocate buffers for maps");
|
---|
| 586 | }
|
---|
| 587 | FIRSTZONE = NORM_FIRSTZONE;
|
---|
| 588 | inode_map = xmalloc(IMAPS * BLOCK_SIZE);
|
---|
| 589 | zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
|
---|
| 590 | memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
|
---|
| 591 | memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
|
---|
| 592 | for (i = FIRSTZONE; i < ZONES; i++)
|
---|
| 593 | unmark_zone(i);
|
---|
| 594 | for (i = MINIX_ROOT_INO; i <= INODES; i++)
|
---|
| 595 | unmark_inode(i);
|
---|
| 596 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
| 597 | memset(inode_buffer, 0, INODE_BUFFER_SIZE);
|
---|
| 598 | printf("%ld inodes\n", (long)INODES);
|
---|
| 599 | printf("%ld blocks\n", (long)ZONES);
|
---|
| 600 | printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
|
---|
| 601 | printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
|
---|
| 602 | printf("Maxsize=%ld\n\n", (long)MAXSIZE);
|
---|
| 603 | }
|
---|
| 604 |
|
---|
| 605 | /*
|
---|
| 606 | * Perform a test of a block; return the number of
|
---|
| 607 | * blocks readable/writable.
|
---|
| 608 | */
|
---|
| 609 | static inline long do_check(char *buffer, int try, unsigned int current_block)
|
---|
| 610 | {
|
---|
| 611 | long got;
|
---|
| 612 |
|
---|
| 613 | /* Seek to the correct loc. */
|
---|
| 614 | if (lseek(DEV, current_block * BLOCK_SIZE, SEEK_SET) !=
|
---|
| 615 | current_block * BLOCK_SIZE) {
|
---|
| 616 | bb_error_msg_and_die("seek failed during testing of blocks");
|
---|
| 617 | }
|
---|
| 618 |
|
---|
| 619 |
|
---|
| 620 | /* Try the read */
|
---|
| 621 | got = read(DEV, buffer, try * BLOCK_SIZE);
|
---|
| 622 | if (got < 0)
|
---|
| 623 | got = 0;
|
---|
| 624 | if (got & (BLOCK_SIZE - 1)) {
|
---|
| 625 | printf("Weird values in do_check: probably bugs\n");
|
---|
| 626 | }
|
---|
| 627 | got /= BLOCK_SIZE;
|
---|
| 628 | return got;
|
---|
| 629 | }
|
---|
| 630 |
|
---|
| 631 | static unsigned int currently_testing;
|
---|
| 632 |
|
---|
| 633 | static void alarm_intr(int alnum)
|
---|
| 634 | {
|
---|
| 635 | if (currently_testing >= ZONES)
|
---|
| 636 | return;
|
---|
| 637 | signal(SIGALRM, alarm_intr);
|
---|
| 638 | alarm(5);
|
---|
| 639 | if (!currently_testing)
|
---|
| 640 | return;
|
---|
| 641 | printf("%d ...", currently_testing);
|
---|
| 642 | fflush(stdout);
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 | static void check_blocks(void)
|
---|
| 646 | {
|
---|
| 647 | int try, got;
|
---|
| 648 | static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
|
---|
| 649 |
|
---|
| 650 | currently_testing = 0;
|
---|
| 651 | signal(SIGALRM, alarm_intr);
|
---|
| 652 | alarm(5);
|
---|
| 653 | while (currently_testing < ZONES) {
|
---|
| 654 | if (lseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET) !=
|
---|
| 655 | currently_testing * BLOCK_SIZE)
|
---|
| 656 | bb_error_msg_and_die("seek failed in check_blocks");
|
---|
| 657 | try = TEST_BUFFER_BLOCKS;
|
---|
| 658 | if (currently_testing + try > ZONES)
|
---|
| 659 | try = ZONES - currently_testing;
|
---|
| 660 | got = do_check(buffer, try, currently_testing);
|
---|
| 661 | currently_testing += got;
|
---|
| 662 | if (got == try)
|
---|
| 663 | continue;
|
---|
| 664 | if (currently_testing < FIRSTZONE)
|
---|
| 665 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
| 666 | mark_zone(currently_testing);
|
---|
| 667 | badblocks++;
|
---|
| 668 | currently_testing++;
|
---|
| 669 | }
|
---|
| 670 | if (badblocks > 1)
|
---|
| 671 | printf("%d bad blocks\n", badblocks);
|
---|
| 672 | else if (badblocks == 1)
|
---|
| 673 | printf("one bad block\n");
|
---|
| 674 | }
|
---|
| 675 |
|
---|
| 676 | static void get_list_blocks(char *filename)
|
---|
| 677 | {
|
---|
| 678 | FILE *listfile;
|
---|
| 679 | unsigned long blockno;
|
---|
| 680 |
|
---|
| 681 | listfile = bb_xfopen(filename, "r");
|
---|
| 682 | while (!feof(listfile)) {
|
---|
| 683 | fscanf(listfile, "%ld\n", &blockno);
|
---|
| 684 | mark_zone(blockno);
|
---|
| 685 | badblocks++;
|
---|
| 686 | }
|
---|
| 687 | if (badblocks > 1)
|
---|
| 688 | printf("%d bad blocks\n", badblocks);
|
---|
| 689 | else if (badblocks == 1)
|
---|
| 690 | printf("one bad block\n");
|
---|
| 691 | }
|
---|
| 692 |
|
---|
| 693 | int mkfs_minix_main(int argc, char **argv)
|
---|
| 694 | {
|
---|
| 695 | int i=1;
|
---|
| 696 | char *tmp;
|
---|
| 697 | struct stat statbuf;
|
---|
| 698 | char *listfile = NULL;
|
---|
| 699 | int stopIt=FALSE;
|
---|
| 700 |
|
---|
| 701 | if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
| 702 | bb_error_msg_and_die("bad inode size");
|
---|
| 703 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 704 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
| 705 | bb_error_msg_and_die("bad inode size");
|
---|
| 706 | #endif
|
---|
| 707 |
|
---|
| 708 | /* Parse options */
|
---|
| 709 | argv++;
|
---|
| 710 | while (--argc >= 0 && *argv && **argv) {
|
---|
| 711 | if (**argv == '-') {
|
---|
| 712 | stopIt=FALSE;
|
---|
| 713 | while (i > 0 && *++(*argv) && stopIt==FALSE) {
|
---|
| 714 | switch (**argv) {
|
---|
| 715 | case 'c':
|
---|
| 716 | check = 1;
|
---|
| 717 | break;
|
---|
| 718 | case 'i':
|
---|
| 719 | {
|
---|
| 720 | char *cp=NULL;
|
---|
| 721 | if (*(*argv+1) != 0) {
|
---|
| 722 | cp = ++(*argv);
|
---|
| 723 | } else {
|
---|
| 724 | if (--argc == 0) {
|
---|
| 725 | goto goodbye;
|
---|
| 726 | }
|
---|
| 727 | cp = *(++argv);
|
---|
| 728 | }
|
---|
| 729 | req_nr_inodes = strtoul(cp, &tmp, 0);
|
---|
| 730 | if (*tmp)
|
---|
| 731 | bb_show_usage();
|
---|
| 732 | stopIt=TRUE;
|
---|
| 733 | break;
|
---|
| 734 | }
|
---|
| 735 | case 'l':
|
---|
| 736 | if (--argc == 0) {
|
---|
| 737 | goto goodbye;
|
---|
| 738 | }
|
---|
| 739 | listfile = *(++argv);
|
---|
| 740 | break;
|
---|
| 741 | case 'n':
|
---|
| 742 | {
|
---|
| 743 | char *cp=NULL;
|
---|
| 744 |
|
---|
| 745 | if (*(*argv+1) != 0) {
|
---|
| 746 | cp = ++(*argv);
|
---|
| 747 | } else {
|
---|
| 748 | if (--argc == 0) {
|
---|
| 749 | goto goodbye;
|
---|
| 750 | }
|
---|
| 751 | cp = *(++argv);
|
---|
| 752 | }
|
---|
| 753 | i = strtoul(cp, &tmp, 0);
|
---|
| 754 | if (*tmp)
|
---|
| 755 | bb_show_usage();
|
---|
| 756 | if (i == 14)
|
---|
| 757 | magic = MINIX_SUPER_MAGIC;
|
---|
| 758 | else if (i == 30)
|
---|
| 759 | magic = MINIX_SUPER_MAGIC2;
|
---|
| 760 | else
|
---|
| 761 | bb_show_usage();
|
---|
| 762 | namelen = i;
|
---|
| 763 | dirsize = i + 2;
|
---|
| 764 | stopIt=TRUE;
|
---|
| 765 | break;
|
---|
| 766 | }
|
---|
| 767 | case 'v':
|
---|
| 768 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 769 | version2 = 1;
|
---|
| 770 | #else
|
---|
| 771 | bb_error_msg("%s: not compiled with minix v2 support",
|
---|
| 772 | device_name);
|
---|
| 773 | exit(-1);
|
---|
| 774 | #endif
|
---|
| 775 | break;
|
---|
| 776 | case '-':
|
---|
| 777 | case 'h':
|
---|
| 778 | default:
|
---|
| 779 | goodbye:
|
---|
| 780 | bb_show_usage();
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
| 783 | } else {
|
---|
| 784 | if (device_name == NULL)
|
---|
| 785 | device_name = *argv;
|
---|
| 786 | else if (BLOCKS == 0)
|
---|
| 787 | BLOCKS = strtol(*argv, &tmp, 0);
|
---|
| 788 | else {
|
---|
| 789 | goto goodbye;
|
---|
| 790 | }
|
---|
| 791 | }
|
---|
| 792 | argv++;
|
---|
| 793 | }
|
---|
| 794 |
|
---|
| 795 | if (device_name && !BLOCKS)
|
---|
| 796 | BLOCKS = get_size(device_name) / 1024;
|
---|
| 797 | if (!device_name || BLOCKS < 10) {
|
---|
| 798 | bb_show_usage();
|
---|
| 799 | }
|
---|
| 800 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 801 | if (version2) {
|
---|
| 802 | if (namelen == 14)
|
---|
| 803 | magic = MINIX2_SUPER_MAGIC;
|
---|
| 804 | else
|
---|
| 805 | magic = MINIX2_SUPER_MAGIC2;
|
---|
| 806 | } else
|
---|
| 807 | #endif
|
---|
| 808 | if (BLOCKS > 65535)
|
---|
| 809 | BLOCKS = 65535;
|
---|
| 810 | check_mount(); /* is it already mounted? */
|
---|
| 811 | tmp = root_block;
|
---|
| 812 | *(short *) tmp = 1;
|
---|
| 813 | strcpy(tmp + 2, ".");
|
---|
| 814 | tmp += dirsize;
|
---|
| 815 | *(short *) tmp = 1;
|
---|
| 816 | strcpy(tmp + 2, "..");
|
---|
| 817 | tmp += dirsize;
|
---|
| 818 | *(short *) tmp = 2;
|
---|
| 819 | strcpy(tmp + 2, ".badblocks");
|
---|
| 820 | DEV = bb_xopen3(device_name, O_RDWR, 0);
|
---|
| 821 | if (fstat(DEV, &statbuf) < 0)
|
---|
| 822 | bb_error_msg_and_die("unable to stat %s", device_name);
|
---|
| 823 | if (!S_ISBLK(statbuf.st_mode))
|
---|
| 824 | check = 0;
|
---|
| 825 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
---|
| 826 | bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
|
---|
| 827 | setup_tables();
|
---|
| 828 | if (check)
|
---|
| 829 | check_blocks();
|
---|
| 830 | else if (listfile)
|
---|
| 831 | get_list_blocks(listfile);
|
---|
| 832 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
| 833 | if (version2) {
|
---|
| 834 | make_root_inode2();
|
---|
| 835 | make_bad_inode2();
|
---|
| 836 | } else
|
---|
| 837 | #endif
|
---|
| 838 | {
|
---|
| 839 | make_root_inode();
|
---|
| 840 | make_bad_inode();
|
---|
| 841 | }
|
---|
| 842 | mark_good_blocks();
|
---|
| 843 | write_tables();
|
---|
| 844 | return 0;
|
---|
| 845 |
|
---|
| 846 | }
|
---|