1 /* vi: set sw=4 ts=4: */
3 * mkfs_vfat: utility to create FAT32 filesystem
4 * inspired by dosfstools
6 * Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com>
8 * Licensed under GPLv2, see file LICENSE in this tarball for details.
10 #include <linux/hdreg.h> /* HDIO_GETGEO */
11 #include <linux/fd.h> /* FDGETPRM */
12 #include <sys/mount.h> /* BLKSSZGET */
13 #if !defined(BLKSSZGET)
14 # define BLKSSZGET _IO(0x12, 104)
16 //#include <linux/msdos_fs.h>
18 #include "volume_id/volume_id_internal.h"
20 #define SECTOR_SIZE 512
22 #define SECTORS_PER_BLOCK (BLOCK_SIZE / SECTOR_SIZE)
24 // M$ says the high 4 bits of a FAT32 FAT entry are reserved
25 #define EOF_FAT32 0x0FFFFFF8
26 #define BAD_FAT32 0x0FFFFFF7
27 #define MAX_CLUST_32 0x0FFFFFF0
33 /* FAT32 filesystem looks like this:
34 * sector -nn...-1: "hidden" sectors, all sectors before this partition
35 * (-h hidden-sectors sets it. Useful only for boot loaders,
36 * they need to know _disk_ offset in order to be able to correctly
37 * address sectors relative to start of disk)
38 * sector 0: boot sector
39 * sector 1: info sector
40 * sector 2: set aside for boot code which didn't fit into sector 0
41 * ...(zero-filled sectors)...
42 * sector B: backup copy of sector 0 [B set by -b backup-boot-sector]
43 * sector B+1: backup copy of sector 1
44 * sector B+2: backup copy of sector 2
45 * ...(zero-filled sectors)...
46 * sector R: FAT#1 [R set by -R reserved-sectors]
48 * sector R+fat_size: FAT#2
50 * sector R+fat_size*2: cluster #2
52 * sector R+fat_size*2+clust_size: cluster #3
53 * ...(the rest is filled by clusters till the end)...
57 // Perhaps this should remain constant
58 info_sector_number = 1,
59 // TODO: make these cmdline options
60 // dont forget sanity check: backup_boot_sector + 3 <= reserved_sect
61 backup_boot_sector = 3,
65 // how many blocks we try to read while testing
66 #define TEST_BUFFER_BLOCKS 16
68 struct msdos_dir_entry {
69 char name[11]; /* 000 name and extension */
70 uint8_t attr; /* 00b attribute bits */
71 uint8_t lcase; /* 00c case for base and extension */
72 uint8_t ctime_cs; /* 00d creation time, centiseconds (0-199) */
73 uint16_t ctime; /* 00e creation time */
74 uint16_t cdate; /* 010 creation date */
75 uint16_t adate; /* 012 last access date */
76 uint16_t starthi; /* 014 high 16 bits of cluster in FAT32 */
77 uint16_t time; /* 016 time */
78 uint16_t date; /* 018 date */
79 uint16_t start; /* 01a first cluster */
80 uint32_t size; /* 01c file size in bytes */
81 } __attribute__ ((packed));
83 /* Example of boot sector's beginning:
84 0000 eb 58 90 4d 53 57 49 4e 34 2e 31 00 02 08 26 00 |...MSWIN4.1...&.|
85 0010 02 00 00 00 00 f8 00 00 3f 00 ff 00 3f 00 00 00 |........?...?...|
86 0020 54 9b d0 00 0d 34 00 00 00 00 00 00 02 00 00 00 |T....4..........|
87 0030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
88 0040 80 00 29 71 df 51 e0 4e 4f 20 4e 41 4d 45 20 20 |..)q.Q.NO NAME |
89 0050 20 20 46 41 54 33 32 20 20 20 33 c9 8e d1 bc f4 | FAT32 3.....|
91 struct msdos_volume_info { /* (offsets are relative to start of boot sector) */
92 uint8_t drive_number; /* 040 BIOS drive number */
93 uint8_t reserved; /* 041 unused */
94 uint8_t ext_boot_sign; /* 042 0x29 if fields below exist (DOS 3.3+) */
95 uint32_t volume_id32; /* 043 volume ID number */
96 char volume_label[11];/* 047 volume label */
97 char fs_type[8]; /* 052 typically "FATnn" */
98 } __attribute__ ((packed)); /* 05a end. Total size 26 (0x1a) bytes */
100 struct msdos_boot_sector {
101 char boot_jump[3]; /* 000 short or near jump instruction */
102 char system_id[8]; /* 003 name - can be used to special case partition manager volumes */
103 uint16_t bytes_per_sect; /* 00b bytes per logical sector */
104 uint8_t sect_per_clust; /* 00d sectors/cluster */
105 uint16_t reserved_sect; /* 00e reserved sectors (sector offset of 1st FAT relative to volume start) */
106 uint8_t fats; /* 010 number of FATs */
107 uint16_t dir_entries; /* 011 root directory entries */
108 uint16_t volume_size_sect; /* 013 volume size in sectors */
109 uint8_t media_byte; /* 015 media code */
110 uint16_t sect_per_fat; /* 016 sectors/FAT */
111 uint16_t sect_per_track; /* 018 sectors per track */
112 uint16_t heads; /* 01a number of heads */
113 uint32_t hidden; /* 01c hidden sectors (sector offset of volume within physical disk) */
114 uint32_t fat32_volume_size_sect; /* 020 volume size in sectors (if volume_size_sect == 0) */
115 uint32_t fat32_sect_per_fat; /* 024 sectors/FAT */
116 uint16_t fat32_flags; /* 028 bit 8: fat mirroring, low 4: active fat */
117 uint8_t fat32_version[2]; /* 02a major, minor filesystem version (I see 0,0) */
118 uint32_t fat32_root_cluster; /* 02c first cluster in root directory */
119 uint16_t fat32_info_sector; /* 030 filesystem info sector (usually 1) */
120 uint16_t fat32_backup_boot; /* 032 backup boot sector (usually 6) */
121 uint32_t reserved2[3]; /* 034 unused */
122 struct msdos_volume_info vi; /* 040 */
123 char boot_code[0x200 - 0x5a - 2]; /* 05a */
124 #define BOOT_SIGN 0xAA55
125 uint16_t boot_sign; /* 1fe */
126 } __attribute__ ((packed));
128 #define FAT_FSINFO_SIG1 0x41615252
129 #define FAT_FSINFO_SIG2 0x61417272
130 struct fat32_fsinfo {
131 uint32_t signature1; /* 0x52,0x52,0x41,0x61, "RRaA" */
132 uint32_t reserved1[128 - 8];
133 uint32_t signature2; /* 0x72,0x72,0x61,0x41, "rrAa" */
134 uint32_t free_clusters; /* free cluster count. -1 if unknown */
135 uint32_t next_cluster; /* most recently allocated cluster */
136 uint32_t reserved2[3];
137 uint16_t reserved3; /* 1fc */
138 uint16_t boot_sign; /* 1fe */
139 } __attribute__ ((packed));
142 char BUG1[sizeof(struct msdos_dir_entry ) == 0x20 ? 1 : -1];
143 char BUG2[sizeof(struct msdos_volume_info) == 0x1a ? 1 : -1];
144 char BUG3[sizeof(struct msdos_boot_sector) == 0x200 ? 1 : -1];
145 char BUG4[sizeof(struct fat32_fsinfo ) == 0x200 ? 1 : -1];
148 static const char boot_code[] ALIGN1 =
149 "\x0e" /* 05a: push cs */
150 "\x1f" /* 05b: pop ds */
151 "\xbe\x77\x7c" /* write_msg: mov si, offset message_txt */
152 "\xac" /* 05f: lodsb */
153 "\x22\xc0" /* 060: and al, al */
154 "\x74\x0b" /* 062: jz key_press */
155 "\x56" /* 064: push si */
156 "\xb4\x0e" /* 065: mov ah, 0eh */
157 "\xbb\x07\x00" /* 067: mov bx, 0007h */
158 "\xcd\x10" /* 06a: int 10h */
159 "\x5e" /* 06c: pop si */
160 "\xeb\xf0" /* 06d: jmp write_msg */
161 "\x32\xe4" /* key_press: xor ah, ah */
162 "\xcd\x16" /* 071: int 16h */
163 "\xcd\x19" /* 073: int 19h */
164 "\xeb\xfe" /* foo: jmp foo */
165 /* 077: message_txt: */
166 "This is not a bootable disk\r\n";
169 #define MARK_CLUSTER(cluster, value) \
170 ((uint32_t *)fat)[cluster] = cpu_to_le32(value)
172 void BUG_unsupported_field_size(void);
173 #define STORE_LE(field, value) \
175 if (sizeof(field) == 4) \
176 field = cpu_to_le32(value); \
177 else if (sizeof(field) == 2) \
178 field = cpu_to_le16(value); \
179 else if (sizeof(field) == 1) \
182 BUG_unsupported_field_size(); \
186 * mkdosfs 2.11 (12 Mar 2005)
187 * Usage: mkdosfs [-A] [-c] [-C] [-v] [-I] [-l bad-block-file]
188 * [-b backup-boot-sector]
189 * [-m boot-msg-file] [-n volume-name] [-i volume-id]
190 * [-s sectors-per-cluster] [-S logical-sector-size]
191 * [-f number-of-FATs]
192 * [-h hidden-sectors] [-F fat-size] [-r root-dir-entries]
193 * [-R reserved-sectors]
196 int mkfs_vfat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
197 int mkfs_vfat_main(int argc UNUSED_PARAM, char **argv)
200 const char *volume_label = "";
203 uoff_t volume_size_bytes;
204 uoff_t volume_size_sect;
205 uint32_t total_clust;
208 unsigned bytes_per_sect;
209 unsigned sect_per_fat;
211 uint16_t sect_per_track;
213 uint8_t sect_per_clust;
216 OPT_A = 1 << 0, // [IGNORED] atari format
217 OPT_b = 1 << 1, // [IGNORED] location of backup boot sector
218 OPT_c = 1 << 2, // [IGNORED] check filesystem
219 OPT_C = 1 << 3, // [IGNORED] create a new file
220 OPT_f = 1 << 4, // [IGNORED] number of FATs
221 OPT_F = 1 << 5, // [IGNORED, implied 32] choose FAT size
222 OPT_h = 1 << 6, // [IGNORED] number of hidden sectors
223 OPT_I = 1 << 7, // [IGNORED] don't bark at entire disk devices
224 OPT_i = 1 << 8, // [IGNORED] volume ID
225 OPT_l = 1 << 9, // [IGNORED] bad block filename
226 OPT_m = 1 << 10, // [IGNORED] message file
227 OPT_n = 1 << 11, // volume label
228 OPT_r = 1 << 12, // [IGNORED] root directory entries
229 OPT_R = 1 << 13, // [IGNORED] number of reserved sectors
230 OPT_s = 1 << 14, // [IGNORED] sectors per cluster
231 OPT_S = 1 << 15, // [IGNORED] sector size
232 OPT_v = 1 << 16, // verbose
235 opt_complementary = "-1";//:b+:f+:F+:h+:r+:R+:s+:S+:vv:c--l:l--c";
236 opts = getopt32(argv, "Ab:cCf:F:h:Ii:l:m:n:r:R:s:S:v",
237 NULL, NULL, NULL, NULL, NULL,
238 NULL, NULL, &volume_label, NULL, NULL, NULL, NULL);
242 device_name = argv[0];
243 // default volume ID = creation time
244 volume_id = time(NULL);
246 dev = xopen(device_name, O_EXCL | O_RDWR);
247 if (fstat(dev, &st) < 0)
248 bb_simple_perror_msg_and_die(device_name);
251 // Get image size and sector size
253 bytes_per_sect = SECTOR_SIZE;
254 volume_size_bytes = st.st_size;
255 if (!S_ISBLK(st.st_mode)) {
256 if (!S_ISREG(st.st_mode)) {
258 bb_error_msg_and_die("image size must be specified");
260 // not a block device, skip bad sectors check
263 int min_bytes_per_sect;
265 // more portable than BLKGETSIZE[64]
266 volume_size_bytes = xlseek(dev, 0, SEEK_END);
267 xlseek(dev, 0, SEEK_SET);
270 // for true block devices we do check sanity
271 device_num = st.st_rdev & 0xff3f;
272 // do we allow to format the whole disk device?
273 if (!(opts & OPT_I) && (
274 device_num == 0x0300 || // hda, hdb
275 (device_num & 0xff0f) == 0x0800 || // sd
276 device_num == 0x0d00 || // xd
277 device_num == 0x1600 ) // hdc, hdd
279 bb_error_msg_and_die("will not try to make filesystem on full-disk device (use -I if wanted)");
280 // can't work on mounted filesystems
281 if (find_mount_point(device_name))
282 bb_error_msg_and_die("can't format mounted filesystem");
284 // get true sector size
285 // (parameter must be int*, not long* or size_t*)
286 xioctl(dev, BLKSSZGET, &min_bytes_per_sect);
287 if (min_bytes_per_sect > SECTOR_SIZE) {
288 bytes_per_sect = min_bytes_per_sect;
289 bb_error_msg("for this device sector size is %u", min_bytes_per_sect);
293 volume_size_bytes = XATOOFF(argv[1]);
294 if (volume_size_bytes >= MAXINT(off_t) / 1024)
295 bb_error_msg_and_die("image size is too big");
296 volume_size_bytes *= 1024;
298 volume_size_sect = volume_size_bytes / bytes_per_sect;
301 // Find out or guess media parameters
308 struct hd_geometry geometry;
309 // size (in sectors), sect (per track), head
310 struct floppy_struct param;
312 // N.B. whether to use HDIO_GETGEO or HDIO_REQ?
313 if (ioctl(dev, HDIO_GETGEO, &geometry) == 0
318 sect_per_track = geometry.sectors;
319 heads = geometry.heads;
322 /* For FAT32, try to do the same as M$'s format command
323 * (see http://www.win.tue.nl/~aeb/linux/fs/fat/fatgen103.pdf p. 20):
324 * fs size <= 260M: 0.5k clusters
325 * fs size <= 8G: 4k clusters
326 * fs size <= 16G: 8k clusters
327 * fs size > 16G: 16k clusters
330 if (volume_size_bytes >= 260*1024*1024) {
333 /* "error: integer overflow in expression" */
334 /* "error: right shift count >= width of type" */
335 if (sizeof(off_t) > 4) {
336 unsigned t = (volume_size_bytes >> 31 >> 1);
344 // floppy, loop, or regular file
345 int not_floppy = ioctl(dev, FDGETPRM, ¶m);
346 if (not_floppy == 0) {
348 sect_per_track = param.sect;
350 volume_size_sect = param.size;
351 volume_size_bytes = param.size * SECTOR_SIZE;
353 // setup the media descriptor byte
354 switch (volume_size_sect) {
355 case 2*360: // 5.25", 2, 9, 40 - 360K
358 case 2*720: // 3.5", 2, 9, 80 - 720K
359 case 2*1200: // 5.25", 2, 15, 80 - 1200K
362 default: // anything else
364 goto set_cluster_size;
365 case 2*1440: // 3.5", 2, 18, 80 - 1440K
366 case 2*2880: // 3.5", 2, 36, 80 - 2880K
370 // not floppy, but size matches floppy exactly.
371 // perhaps it is a floppy image.
372 // we already set media_byte as if it is a floppy,
373 // now set sect_per_track and heads.
375 sect_per_track = (unsigned)volume_size_sect / 160;
376 if (sect_per_track < 9)
382 // Calculate number of clusters, sectors/cluster, sectors/FAT
383 // (an initial guess for sect_per_clust should already be set)
385 // "mkdosfs -v -F 32 image5k 5" is the minimum:
386 // 2 sectors for FATs and 2 data sectors
387 if ((off_t)(volume_size_sect - reserved_sect) < 4)
388 bb_error_msg_and_die("the image is too small for FAT32");
393 off_t tcl = (volume_size_sect - reserved_sect - NUM_FATS * sect_per_fat) / sect_per_clust;
394 // tcl may be > MAX_CLUST_32 here, but it may be
395 // because sect_per_fat is underestimated,
396 // and with increased sect_per_fat it still may become
397 // <= MAX_CLUST_32. Therefore, we do not check
398 // against MAX_CLUST_32, but against a bigger const:
399 if (tcl > 0x7fffffff)
401 total_clust = tcl; // fits in uint32_t
402 spf_adj = ((total_clust + 2) * 4 + bytes_per_sect - 1) / bytes_per_sect - sect_per_fat;
404 bb_error_msg("sect_per_clust:%u sect_per_fat:%u total_clust:%u",
405 sect_per_clust, sect_per_fat, (int)tcl);
406 bb_error_msg("adjust to sect_per_fat:%d", spf_adj);
409 // do not need to adjust sect_per_fat.
410 // so, was total_clust too big after all?
411 if (total_clust <= MAX_CLUST_32)
412 goto found_total_clust; // no
413 // yes, total_clust is _a bit_ too big
416 // adjust sect_per_fat, go back and recalc total_clust
417 // (note: just "sect_per_fat += spf_adj" isn't ok)
418 sect_per_fat += ((unsigned)spf_adj / 2) | 1;
421 if (sect_per_clust == 128)
422 bb_error_msg_and_die("can't make FAT32 with >128 sectors/cluster");
424 sect_per_fat = (sect_per_fat / 2) | 1;
434 "heads:%u, sectors/track:%u, bytes/sector:%u\n"
435 "media descriptor:%02x\n"
436 "total sectors:%"OFF_FMT"u, clusters:%u, sectors/cluster:%u\n"
437 "FATs:2, sectors/FAT:%u\n"
438 "volumeID:%08x, label:'%s'\n",
440 heads, sect_per_track, bytes_per_sect,
442 volume_size_sect, (int)total_clust, (int)sect_per_clust,
444 (int)volume_id, volume_label
449 // Write filesystem image sequentially (no seeking)
452 // (a | b) is poor man's max(a, b)
453 unsigned bufsize = reserved_sect;
454 //bufsize |= sect_per_fat; // can be quite large
455 bufsize |= 2; // use this instead
456 bufsize |= sect_per_clust;
457 buf = xzalloc(bufsize * bytes_per_sect);
460 { // boot and fsinfo sectors, and their copies
461 struct msdos_boot_sector *boot_blk = (void*)buf;
462 struct fat32_fsinfo *info = (void*)(buf + bytes_per_sect);
464 strcpy(boot_blk->boot_jump, "\xeb\x58\x90" "mkdosfs"); // system_id[8] included :)
465 STORE_LE(boot_blk->bytes_per_sect, bytes_per_sect);
466 STORE_LE(boot_blk->sect_per_clust, sect_per_clust);
467 STORE_LE(boot_blk->reserved_sect, reserved_sect);
468 STORE_LE(boot_blk->fats, 2);
469 //STORE_LE(boot_blk->dir_entries, 0); // for FAT32, stays 0
470 if (volume_size_sect <= 0xffff)
471 STORE_LE(boot_blk->volume_size_sect, volume_size_sect);
472 STORE_LE(boot_blk->media_byte, media_byte);
473 // wrong: this would make Linux think that it's fat12/16:
474 //if (sect_per_fat <= 0xffff)
475 // STORE_LE(boot_blk->sect_per_fat, sect_per_fat);
477 //STORE_LE(boot_blk->sect_per_fat, 0);
478 STORE_LE(boot_blk->sect_per_track, sect_per_track);
479 STORE_LE(boot_blk->heads, heads);
480 //STORE_LE(boot_blk->hidden, 0);
481 STORE_LE(boot_blk->fat32_volume_size_sect, volume_size_sect);
482 STORE_LE(boot_blk->fat32_sect_per_fat, sect_per_fat);
483 //STORE_LE(boot_blk->fat32_flags, 0);
484 //STORE_LE(boot_blk->fat32_version[2], 0,0);
485 STORE_LE(boot_blk->fat32_root_cluster, 2);
486 STORE_LE(boot_blk->fat32_info_sector, info_sector_number);
487 STORE_LE(boot_blk->fat32_backup_boot, backup_boot_sector);
488 //STORE_LE(boot_blk->reserved2[3], 0,0,0);
489 STORE_LE(boot_blk->vi.ext_boot_sign, 0x29);
490 STORE_LE(boot_blk->vi.volume_id32, volume_id);
491 strncpy(boot_blk->vi.fs_type, "FAT32 ", sizeof(boot_blk->vi.fs_type));
492 strncpy(boot_blk->vi.volume_label, volume_label, sizeof(boot_blk->vi.volume_label));
493 memcpy(boot_blk->boot_code, boot_code, sizeof(boot_code));
494 STORE_LE(boot_blk->boot_sign, BOOT_SIGN);
496 STORE_LE(info->signature1, FAT_FSINFO_SIG1);
497 STORE_LE(info->signature2, FAT_FSINFO_SIG2);
498 // we've allocated cluster 2 for the root dir
499 STORE_LE(info->free_clusters, (total_clust - 1));
500 STORE_LE(info->next_cluster, 2);
501 STORE_LE(info->boot_sign, BOOT_SIGN);
504 xwrite(dev, buf, bytes_per_sect * backup_boot_sector);
505 // 2nd copy and possibly zero sectors
506 xwrite(dev, buf, bytes_per_sect * (reserved_sect - backup_boot_sector));
509 { // file allocation tables
511 unsigned char *fat = (void*)buf;
513 memset(buf, 0, bytes_per_sect * 2);
514 // initial FAT entries
515 MARK_CLUSTER(0, 0x0fffff00 | media_byte);
516 MARK_CLUSTER(1, 0xffffffff);
517 // mark cluster 2 as EOF (used for root dir)
518 MARK_CLUSTER(2, EOF_FAT32);
519 for (i = 0; i < NUM_FATS; i++) {
520 xwrite(dev, buf, bytes_per_sect);
521 for (j = 1; j < sect_per_fat; j++)
522 xwrite(dev, buf + bytes_per_sect, bytes_per_sect);
527 // empty directory is just a set of zero bytes
528 memset(buf, 0, sect_per_clust * bytes_per_sect);
529 if (volume_label[0]) {
530 // create dir entry for volume_label
531 struct msdos_dir_entry *de;
537 strncpy(de->name, volume_label, sizeof(de->name));
538 STORE_LE(de->attr, ATTR_VOLUME);
540 localtime_r(&create_time, &tm);
541 t = (tm.tm_sec >> 1) + (tm.tm_min << 5) + (tm.tm_hour << 11);
542 d = tm.tm_mday + ((tm.tm_mon+1) << 5) + ((tm.tm_year-80) << 9);
543 STORE_LE(de->time, t);
544 STORE_LE(de->date, d);
545 //STORE_LE(de->ctime_cs, 0);
546 de->ctime = de->time;
547 de->cdate = de->date;
548 de->adate = de->date;
551 xwrite(dev, buf, sect_per_clust * bytes_per_sect);
555 uoff_t volume_size_blocks;
556 unsigned start_data_sector;
557 unsigned start_data_block;
558 unsigned badblocks = 0;
560 off_t currently_testing;
561 char *blkbuf = xmalloc(BLOCK_SIZE * TEST_BUFFER_BLOCKS);
563 volume_size_blocks = (volume_size_bytes >> BLOCK_SIZE_BITS);
564 // N.B. the two following vars are in hard sectors, i.e. SECTOR_SIZE byte sectors!
565 start_data_sector = (reserved_sect + NUM_FATS * sect_per_fat) * (bytes_per_sect / SECTOR_SIZE);
566 start_data_block = (start_data_sector + SECTORS_PER_BLOCK - 1) / SECTORS_PER_BLOCK;
568 bb_info_msg("searching for bad blocks ");
569 currently_testing = 0;
570 try = TEST_BUFFER_BLOCKS;
571 while (currently_testing < volume_size_blocks) {
572 if (currently_testing + try > volume_size_blocks)
573 try = volume_size_blocks - currently_testing;
574 // perform a test on a block. return the number of blocks
575 // that could be read successfully.
576 // seek to the correct location
577 xlseek(dev, currently_testing * BLOCK_SIZE, SEEK_SET);
579 got = read(dev, blkbuf, try * BLOCK_SIZE);
582 if (got & (BLOCK_SIZE - 1))
583 bb_error_msg("unexpected values in do_check: probably bugs");
585 currently_testing += got;
587 try = TEST_BUFFER_BLOCKS;
591 if (currently_testing < start_data_block)
592 bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
594 // mark all of the sectors in the block as bad
595 for (i = 0; i < SECTORS_PER_BLOCK; i++) {
596 int cluster = (currently_testing * SECTORS_PER_BLOCK + i - start_data_sector) / (int) (sect_per_clust) / (bytes_per_sect / SECTOR_SIZE);
598 bb_error_msg_and_die("invalid cluster number in mark_sector: probably bug!");
599 MARK_CLUSTER(cluster, BAD_FAT32);
606 bb_info_msg("%d bad block(s)", badblocks);
611 if (ENABLE_FEATURE_CLEAN_UP) {