*
* R/W (V)FAT 12/16/32 filesystem implementation by Donggeun Kim
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
if (len == 0)
return;
- memcpy(s_name, filename, len);
+ strcpy(s_name, filename);
uppercase(s_name, len);
period = strchr(s_name, '.');
__u8 *bufptr = mydata->fatbuf;
__u32 startblock = mydata->fatbufnum * FATBUFBLOCKS;
- fatlength *= mydata->sect_size;
startblock += mydata->fat_sect;
if (getsize > fatlength)
__u32 ret = 0x00;
__u16 val1, val2;
+ if (CHECK_CLUST(entry, mydata->fatsize)) {
+ printf("Error: Invalid FAT entry: 0x%08x\n", entry);
+ return ret;
+ }
+
switch (mydata->fatsize) {
case 32:
bufnum = entry / FAT32BUFSIZE;
debug("clustnum: %d, startsect: %d\n", clustnum, startsect);
- if (disk_write(startsect, size / mydata->sect_size, buffer) < 0) {
- debug("Error writing data\n");
- return -1;
+ if ((size / mydata->sect_size) > 0) {
+ if (disk_write(startsect, size / mydata->sect_size, buffer) < 0) {
+ debug("Error writing data\n");
+ return -1;
+ }
}
if (size % mydata->sect_size) {
return dentptr;
}
+ /*
+ * In FAT16/12, the root dir is locate before data area, shows
+ * in following:
+ * -------------------------------------------------------------
+ * | Boot | FAT1 & 2 | Root dir | Data (start from cluster #2) |
+ * -------------------------------------------------------------
+ *
+ * As a result if curclust is in Root dir, it is a negative
+ * number or 0, 1.
+ *
+ */
+ if (mydata->fatsize != 32 && (int)curclust <= 1) {
+ /* Current clust is in root dir, set to next clust */
+ curclust++;
+ if ((int)curclust <= 1)
+ continue; /* continue to find */
+
+ /* Reach the end of root dir */
+ empty_dentptr = dentptr;
+ return NULL;
+ }
+
curclust = get_fatent_value(mydata, dir_curclust);
- if ((curclust >= 0xffffff8) || (curclust >= 0xfff8)) {
+ if (IS_LAST_CLUST(curclust, mydata->fatsize)) {
empty_dentptr = dentptr;
return NULL;
}
total_sector = bs.total_sect;
if (total_sector == 0)
- total_sector = cur_part_info.size;
+ total_sector = (int)cur_part_info.size; /* cast of lbaint_t */
if (mydata->fatsize == 32)
mydata->fatlength = bs.fat32_length;
}
mydata->fatbufnum = -1;
- mydata->fatbuf = malloc(FATBUFSIZE);
+ mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
if (mydata->fatbuf == NULL) {
debug("Error: allocating memory\n");
return -1;