Lines Matching refs:bpb
152 struct bpb {
175 struct bpb bpb;
225 static int getstdfmt(const char *, struct bpb *);
226 static int getdiskinfo(int, const char *, const char *, int, struct bpb *);
227 static void print_bpb(struct bpb *);
240 struct bpb bpb;
308 memset(&bpb, 0, sizeof(bpb));
310 if (getstdfmt(o.floppy, &bpb) == -1)
312 bpb.bpbHugeSectors = bpb.bpbSectors;
313 bpb.bpbSectors = 0;
314 bpb.bpbBigFATsecs = bpb.bpbFATsecs;
315 bpb.bpbFATsecs = 0;
318 bpb.bpbHeads = o.drive_heads;
320 bpb.bpbSecPerTrack = o.sectors_per_track;
322 bpb.bpbBytesPerSec = o.bytes_per_sector;
324 bpb.bpbHugeSectors = o.size;
326 bpb.bpbHiddenSecs = o.hidden_sectors;
329 if (getdiskinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb) == -1)
331 bpb.bpbHugeSectors -= (o.offset / bpb.bpbBytesPerSec);
332 if (bpb.bpbSecPerClust == 0) { /* set defaults */
333 if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */
334 bpb.bpbSecPerClust = 1;
335 else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */
336 bpb.bpbSecPerClust = 8;
337 else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */
338 bpb.bpbSecPerClust = 16;
339 else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */
340 bpb.bpbSecPerClust = 32;
342 bpb.bpbSecPerClust = 64; /* otherwise 32k */
345 if (bpb.bpbBytesPerSec < MINBPS ||
346 bpb.bpbBytesPerSec > MAXBPS ||
347 !powerof2(bpb.bpbBytesPerSec)) {
349 bpb.bpbBytesPerSec);
370 bpb.bpbRootDirEnts = 0;
381 if (o.block_size < bpb.bpbBytesPerSec) {
383 o.block_size, bpb.bpbBytesPerSec);
386 if (o.block_size > bpb.bpbBytesPerSec * MAXSPC) {
388 o.block_size, bpb.bpbBytesPerSec * MAXSPC);
391 bpb.bpbSecPerClust = o.block_size / bpb.bpbBytesPerSec;
399 bpb.bpbSecPerClust = o.sectors_per_cluster;
402 bpb.bpbResSectors = o.reserved_sectors;
409 bpb.bpbFATs = o.num_FAT;
412 bpb.bpbRootDirEnts = o.directory_entries;
418 bpb.bpbMedia = o.media_descriptor;
421 bpb.bpbBigFATsecs = o.sectors_per_fat;
423 bpb.bpbFSInfo = o.info_sector;
425 bpb.bpbBackup = o.backup_sector;
439 if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec ||
440 sb.st_size < bpb.bpbBytesPerSec ||
441 sb.st_size > bpb.bpbBytesPerSec * MAXU16) {
445 bss = sb.st_size / bpb.bpbBytesPerSec;
447 if (!bpb.bpbFATs)
448 bpb.bpbFATs = 2;
450 if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
451 howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) *
452 (bpb.bpbSecPerClust ? 16 : 12) / BPN,
453 bpb.bpbBytesPerSec * NPB) *
454 bpb.bpbFATs +
455 howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE,
456 bpb.bpbBytesPerSec / sizeof(struct de)) +
457 (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) *
458 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust :
459 howmany(DEFBLK, bpb.bpbBytesPerSec)))
461 else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors <
462 (bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
463 howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) *
464 bpb.bpbFATs +
465 howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) +
467 (bpb.bpbSecPerClust ? bpb.bpbSecPerClust :
468 howmany(8192, bpb.bpbBytesPerSec)))
475 if (!bpb.bpbFSInfo) {
476 if (x == MAXU16 || x == bpb.bpbBackup) {
480 bpb.bpbFSInfo = x;
482 if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo)
483 x = bpb.bpbFSInfo + 1;
484 if (!bpb.bpbBackup) {
489 bpb.bpbBackup = x;
490 } else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo) {
494 if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup)
495 x = bpb.bpbBackup + 1;
500 set_res = (bpb.bpbResSectors == 0);
501 set_spf = (bpb.bpbBigFATsecs == 0);
502 set_spc = (bpb.bpbSecPerClust == 0);
517 bpb.bpbResSectors = ((fat == 32) ?
518 MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x) + extra_res;
519 else if (bpb.bpbResSectors < x) {
521 bpb.bpbResSectors);
524 if (fat != 32 && !bpb.bpbRootDirEnts)
525 bpb.bpbRootDirEnts = DEFRDE;
526 rds = howmany(bpb.bpbRootDirEnts,
527 bpb.bpbBytesPerSec / sizeof(struct de));
529 for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 :
530 DEFBLK, bpb.bpbBytesPerSec);
531 bpb.bpbSecPerClust < MAXSPC && (bpb.bpbResSectors +
533 bpb.bpbBytesPerSec * NPB) * bpb.bpbFATs +
535 (u_int64_t) (maxcls(fat) + 1) * bpb.bpbSecPerClust) <=
536 bpb.bpbHugeSectors;
537 bpb.bpbSecPerClust <<= 1)
541 if (fat != 32 && bpb.bpbBigFATsecs > MAXU16) {
545 x1 = bpb.bpbResSectors + rds;
546 x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1;
547 if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors) {
551 x1 += x * bpb.bpbFATs;
552 x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB /
553 (bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB +
554 fat / BPN * bpb.bpbFATs);
556 bpb.bpbBytesPerSec * NPB);
558 if (bpb.bpbBigFATsecs == 0)
559 bpb.bpbBigFATsecs = x2;
560 x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs;
564 alignment = (bpb.bpbResSectors + bpb.bpbBigFATsecs * bpb.bpbFATs) %
565 bpb.bpbSecPerClust;
567 extra_res += bpb.bpbSecPerClust - alignment;
574 cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust;
575 x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) -
579 if (bpb.bpbBigFATsecs < x2)
589 bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1;
591 bpb.bpbHugeSectors);
594 "(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust,
595 cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat,
596 cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust);
597 if (!bpb.bpbMedia)
598 bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8;
600 bpb.bpbRootClust = RESFTE;
601 if (bpb.bpbHugeSectors <= MAXU16) {
602 bpb.bpbSectors = bpb.bpbHugeSectors;
603 bpb.bpbHugeSectors = 0;
606 bpb.bpbFATsecs = bpb.bpbBigFATsecs;
607 bpb.bpbBigFATsecs = 0;
609 print_bpb(&bpb);
630 dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs :
631 bpb.bpbBigFATsecs) * bpb.bpbFATs;
640 for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) {
644 (dir + (fat == 32 ? bpb.bpbSecPerClust: rds)),
646 (fat == 32 ? bpb.bpbSecPerClust: rds)));
651 fat == 32 && bpb.bpbBackup != MAXU16 &&
652 bss <= bpb.bpbBackup && x >= bpb.bpbBackup) {
653 x -= bpb.bpbBackup;
660 if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1) {
664 if ((unsigned)n != bpb.bpbBytesPerSec) {
669 memset(img, 0, bpb.bpbBytesPerSec);
671 (fat == 32 && bpb.bpbBackup != MAXU16 &&
672 lsn == bpb.bpbBackup)) {
675 mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec);
676 mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust);
677 mk2(bsbpb->bpbResSectors, bpb.bpbResSectors);
678 mk1(bsbpb->bpbFATs, bpb.bpbFATs);
679 mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts);
680 mk2(bsbpb->bpbSectors, bpb.bpbSectors);
681 mk1(bsbpb->bpbMedia, bpb.bpbMedia);
682 mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs);
683 mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack);
684 mk2(bsbpb->bpbHeads, bpb.bpbHeads);
685 mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs);
686 mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors);
690 mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs);
693 mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust);
694 mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo);
695 mk2(bsxbpb->bpbBackup, bpb.bpbBackup);
725 } else if (fat == 32 && bpb.bpbFSInfo != MAXU16 &&
726 (lsn == bpb.bpbFSInfo ||
727 (bpb.bpbBackup != MAXU16 &&
728 lsn == bpb.bpbBackup + bpb.bpbFSInfo))) {
734 } else if (lsn >= bpb.bpbResSectors && lsn < dir &&
735 !((lsn - bpb.bpbResSectors) %
736 (bpb.bpbFATsecs ? bpb.bpbFATsecs :
737 bpb.bpbBigFATsecs))) {
738 mk1(img[0], bpb.bpbMedia);
758 img += bpb.bpbBytesPerSec;
838 getstdfmt(const char *fmt, struct bpb *bpb)
848 *bpb = stdfmt[i].bpb;
875 struct bpb *bpb)
877 if (ioctl(fd, BLKSSZGET, &bpb->bpbBytesPerSec) == -1) {
881 if (ckgeom(fname, bpb->bpbBytesPerSec, "bytes/sector") == -1) return -1;
888 u_int64_t sectors = device_size/bpb->bpbBytesPerSec;
891 sectors, device_size, bpb->bpbBytesPerSec);
893 bpb->bpbHugeSectors = sectors;
895 bpb->bpbSecPerTrack = 63;
896 if (ckgeom(fname, bpb->bpbSecPerTrack, "sectors/track") == -1) return -1;
898 bpb->bpbHeads = 64;
899 if (ckgeom(fname, bpb->bpbHeads, "drive heads") == -1) return -1;
905 struct bpb *bpb)
937 if (bpb->bpbBytesPerSec)
938 dlp.d_secsize = bpb->bpbBytesPerSec;
939 if (bpb->bpbBytesPerSec == 0 && ioctl(fd, DIOCGSECTORSIZE,
945 if (bpb->bpbSecPerTrack == 0 && ioctl(fd, DIOCGFWSECTORS,
950 if (bpb->bpbHeads == 0 &&
970 if (bpb->bpbBytesPerSec == 0) {
973 bpb->bpbBytesPerSec = lp->d_secsize;
975 if (bpb->bpbSecPerTrack == 0) {
978 bpb->bpbSecPerTrack = lp->d_nsectors;
980 if (bpb->bpbHeads == 0) {
983 bpb->bpbHeads = lp->d_ntracks;
985 if (bpb->bpbHugeSectors == 0)
986 bpb->bpbHugeSectors = lp->d_secperunit;
987 if (bpb->bpbHiddenSecs == 0)
988 bpb->bpbHiddenSecs = hs;
996 print_bpb(struct bpb *bpb)
999 bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors,
1000 bpb->bpbFATs);
1001 if (bpb->bpbRootDirEnts)
1002 printf(" RootDirEnts=%u", bpb->bpbRootDirEnts);
1003 if (bpb->bpbSectors)
1004 printf(" Sectors=%u", bpb->bpbSectors);
1005 printf(" Media=%#x", bpb->bpbMedia);
1006 if (bpb->bpbFATsecs)
1007 printf(" FATsecs=%u", bpb->bpbFATsecs);
1008 printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack,
1009 bpb->bpbHeads, bpb->bpbHiddenSecs);
1010 if (bpb->bpbHugeSectors)
1011 printf(" HugeSectors=%u", bpb->bpbHugeSectors);
1012 if (!bpb->bpbFATsecs) {
1013 printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs,
1014 bpb->bpbRootClust);
1016 printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo);
1018 printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup);