147 static int flush_dirty_fat_buffer(fsdata *mydata);
150 int flush_dirty_fat_buffer(fsdata *mydata)  in flush_dirty_fat_buffer()  argument
152 	(void)(mydata);  in flush_dirty_fat_buffer()
161 static __u32 get_fatent(fsdata *mydata, __u32 entry)  in get_fatent()  argument
167 	if (CHECK_CLUST(entry, mydata->fatsize)) {  in get_fatent()
172 	switch (mydata->fatsize) {  in get_fatent()
192 	       mydata->fatsize, entry, entry, offset, offset);  in get_fatent()
195 	if (bufnum != mydata->fatbufnum) {  in get_fatent()
197 		__u8 *bufptr = mydata->fatbuf;  in get_fatent()
198 		__u32 fatlength = mydata->fatlength;  in get_fatent()
205 		startblock += mydata->fat_sect;	/* Offset from start of disk */  in get_fatent()
208 		if (flush_dirty_fat_buffer(mydata) < 0)  in get_fatent()
215 		mydata->fatbufnum = bufnum;  in get_fatent()
219 	switch (mydata->fatsize) {  in get_fatent()
221 		ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);  in get_fatent()
224 		ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);  in get_fatent()
229 		ret = mydata->fatbuf[off8] + (mydata->fatbuf[off8 + 1] << 8);  in get_fatent()
236 	       mydata->fatsize, ret, entry, offset);  in get_fatent()
246 get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)  in get_cluster()  argument
253 		startsect = clust_to_sect(mydata, clustnum);  in get_cluster()
255 		startsect = mydata->rootdir_sect;  in get_cluster()
261 		ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);  in get_cluster()
265 		while (size >= mydata->sect_size) {  in get_cluster()
272 			memcpy(buffer, tmpbuf, mydata->sect_size);  in get_cluster()
273 			buffer += mydata->sect_size;  in get_cluster()
274 			size -= mydata->sect_size;  in get_cluster()
277 		idx = size / mydata->sect_size;  in get_cluster()
284 		idx *= mydata->sect_size;  in get_cluster()
289 		ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);  in get_cluster()
311 static int get_contents(fsdata *mydata, dir_entry *dentptr, loff_t pos,  in get_contents()  argument
315 	unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;  in get_contents()
337 		curclust = get_fatent(mydata, curclust);  in get_contents()
338 		if (CHECK_CLUST(curclust, mydata->fatsize)) {  in get_contents()
354 		if (get_cluster(mydata, curclust, get_contents_vfatname_block,  in get_contents()
367 		curclust = get_fatent(mydata, curclust);  in get_contents()
368 		if (CHECK_CLUST(curclust, mydata->fatsize)) {  in get_contents()
381 			newclust = get_fatent(mydata, endclust);  in get_contents()
384 			if (CHECK_CLUST(newclust, mydata->fatsize)) {  in get_contents()
395 		if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {  in get_contents()
402 		if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {  in get_contents()
410 		curclust = get_fatent(mydata, endclust);  in get_contents()
411 		if (CHECK_CLUST(curclust, mydata->fatsize)) {  in get_contents()
547 static int get_fs_info(fsdata *mydata)  in get_fs_info()  argument
553 	ret = read_bootsectandvi(&bs, &volinfo, &mydata->fatsize);  in get_fs_info()
559 	if (mydata->fatsize == 32) {  in get_fs_info()
560 		mydata->fatlength = bs.fat32_length;  in get_fs_info()
562 		mydata->fatlength = bs.fat_length;  in get_fs_info()
565 	mydata->fat_sect = bs.reserved;  in get_fs_info()
567 	mydata->rootdir_sect = mydata->fat_sect + mydata->fatlength * bs.fats;  in get_fs_info()
569 	mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];  in get_fs_info()
570 	mydata->clust_size = bs.cluster_size;  in get_fs_info()
571 	if (mydata->sect_size != cur_part_info.blksz) {  in get_fs_info()
573 				mydata->sect_size, cur_part_info.blksz);  in get_fs_info()
577 	if (mydata->fatsize == 32) {  in get_fs_info()
578 		mydata->data_begin = mydata->rootdir_sect -  in get_fs_info()
579 					(mydata->clust_size * 2);  in get_fs_info()
580 		mydata->root_cluster = bs.root_cluster;  in get_fs_info()
582 		mydata->rootdir_size = ((bs.dir_entries[1]  * (int)256 +  in get_fs_info()
585 					 mydata->sect_size;  in get_fs_info()
586 		mydata->data_begin = mydata->rootdir_sect +  in get_fs_info()
587 					mydata->rootdir_size -  in get_fs_info()
588 					(mydata->clust_size * 2);  in get_fs_info()
589 		mydata->root_cluster =  in get_fs_info()
590 			sect_to_clust(mydata, mydata->rootdir_sect);  in get_fs_info()
593 	mydata->fatbufnum = -1;  in get_fs_info()
594 	mydata->fat_dirty = 0;  in get_fs_info()
595 	mydata->fatbuf = malloc_cache_aligned(FATBUFSIZE);  in get_fs_info()
596 	if (mydata->fatbuf == NULL) {  in get_fs_info()
602 	       mydata->fatsize, mydata->fat_sect, mydata->fatlength);  in get_fs_info()
605 	       mydata->root_cluster,  in get_fs_info()
606 	       mydata->rootdir_sect,  in get_fs_info()
607 	       mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);  in get_fs_info()
608 	debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,  in get_fs_info()
609 	      mydata->clust_size);  in get_fs_info()
695 	fsdata *mydata = parent->fsdata;  /* for silly macros */  in fat_itr_child()  local
715 	fsdata *mydata = itr->fsdata;  /* for silly macros */  in next_cluster()  local