170 	struct bootblock	*boot;  member
525 	return (fat->boot);  in boot_of_()
559 	const struct bootblock *boot = boot_of_(fat);  in valid_cl()  local
561 	return (cl >= CLUST_FIRST && cl < boot->NumClusters);  in valid_cl()
582 checkdirty(int fs, struct bootblock *boot)  in checkdirty()  argument
589 	if (boot->ClustMask != CLUST16_MASK && boot->ClustMask != CLUST32_MASK)  in checkdirty()
592 	off = boot->bpbResSectors;  in checkdirty()
593 	off *= boot->bpbBytesPerSec;  in checkdirty()
595 	buffer = malloc(len = boot->bpbBytesPerSec);  in checkdirty()
606 	if ((size_t)read(fs, buffer, boot->bpbBytesPerSec) !=  in checkdirty()
607 	    boot->bpbBytesPerSec) {  in checkdirty()
616 	if (buffer[0] != boot->bpbMedia || buffer[1] != 0xff)  in checkdirty()
618 	if (boot->ClustMask == CLUST16_MASK) {  in checkdirty()
631 	if (boot->ClustMask == CLUST16_MASK) {  in checkdirty()
648 	struct bootblock *boot;  in cleardirty()  local
653 	boot = boot_of_(fat);  in cleardirty()
656 	if (boot->ClustMask != CLUST16_MASK && boot->ClustMask != CLUST32_MASK)  in cleardirty()
659 	off = boot->bpbResSectors;  in cleardirty()
660 	off *= boot->bpbBytesPerSec;  in cleardirty()
662 	buffer = malloc(len = boot->bpbBytesPerSec);  in cleardirty()
673 	if (boot->ClustMask == CLUST16_MASK) {  in cleardirty()
701 	struct bootblock *boot;  in _readfat()  local
704 	boot = boot_of_(fat);  in _readfat()
706 	fat->fatsize = boot->FATsecs * boot->bpbBytesPerSec;  in _readfat()
708 	off = boot->bpbResSectors;  in _readfat()
709 	off *= boot->bpbBytesPerSec;  in _readfat()
734 	if (boot->ClustMask == CLUST32_MASK &&  in _readfat()
739 		fat->fat32_offset = boot->bpbResSectors * boot->bpbBytesPerSec;  in _readfat()
808 readfat(int fs, struct bootblock *boot, struct fat_descriptor **fp)  in readfat()  argument
815 	boot->NumFree = boot->NumBad = 0;  in readfat()
824 	fat->boot = boot;  in readfat()
833 	switch(boot->ClustMask) {  in readfat()
852 		pfatal("Invalid ClustMask: %d", boot->ClustMask);  in readfat()
858 	if (bitmap_ctor(&fat->headbitmap, boot->NumClusters,  in readfat()
861 		    (size_t)boot->NumClusters);  in readfat()
867 	if (buffer[0] != boot->bpbMedia  in readfat()
869 	    || (boot->ClustMask == CLUST16_MASK && buffer[3] != 0xff)  in readfat()
870 	    || (boot->ClustMask == CLUST32_MASK  in readfat()
881 		if (buffer[0] == boot->bpbMedia && buffer[1] == 0xff  in readfat()
883 		    && ((boot->ClustMask == CLUST16_MASK && buffer[3] == 0x7f)  in readfat()
884 			|| (boot->ClustMask == CLUST32_MASK  in readfat()
892 			switch (boot->ClustMask) {  in readfat()
915 				*p++ = (u_char)boot->bpbMedia;  in readfat()
918 				switch (boot->ClustMask) {  in readfat()
966 	for (cl = CLUST_FIRST; cl < boot->NumClusters; cl++) {  in readfat()
972 			if (boot->FSNext == 0) {  in readfat()
973 				boot->FSNext = cl;  in readfat()
978 			boot->NumFree++;  in readfat()
983 			boot->NumBad++;  in readfat()
988 			    nextcl & boot->ClustMask);  in readfat()
1125 	struct bootblock *boot = boot_of_(fat);  in clearchain()  local
1132 		boot->NumFree++;  in clearchain()
1146 	struct bootblock *boot;  in copyfat()  local
1151 	boot = boot_of_(fat);  in copyfat()
1161 	dst_off = boot->bpbResSectors + n * boot->FATsecs;  in copyfat()
1162 	dst_off *= boot->bpbBytesPerSec;  in copyfat()
1196 	struct bootblock *boot;  in writefat()  local
1199 	boot = boot_of_(fat);  in writefat()
1221 		for (i = 1; i < boot->bpbFATs; i++) {  in writefat()
1228 		for (i = fat->is_mmapped ? 1 : 0; i < boot->bpbFATs; i++) {  in writefat()
1229 			dst_base = boot->bpbResSectors + i * boot->FATsecs;  in writefat()
1230 			dst_base *= boot->bpbBytesPerSec;  in writefat()
1253 	struct bootblock *boot;  in checklost()  local
1256 	boot = boot_of_(fat);  in checklost()
1265 	    chains > 0 && head < boot->NumClusters;  in checklost()
1298 	if (boot->bpbFSInfo) {  in checklost()
1300 		if (boot->FSFree != 0xffffffffU &&  in checklost()
1301 		    boot->FSFree != boot->NumFree) {  in checklost()
1303 			      boot->FSFree, boot->NumFree);  in checklost()
1305 				boot->FSFree = boot->NumFree;  in checklost()
1309 		if (boot->FSNext != 0xffffffffU &&  in checklost()
1310 		    (boot->FSNext >= boot->NumClusters ||  in checklost()
1311 		    (boot->NumFree && fat_get_cl_next(fat, boot->FSNext) != CLUST_FREE))) {  in checklost()
1313 			      boot->FSNext,  in checklost()
1314 			      (boot->FSNext >= boot->NumClusters) ? "invalid" : "not free");  in checklost()
1316 				for (head = CLUST_FIRST; head < boot->NumClusters; head++)  in checklost()
1318 						boot->FSNext = head;  in checklost()
1324 			mod |= writefsinfo(dosfs, boot);  in checklost()