#include <asm/byteorder.h>
#include <part.h>
#include <linux/ctype.h>
+#include <div64.h>
+#include <linux/math64.h>
#include "fat.c"
static void uppercase(char *str, int len)
static int total_sector;
static int disk_write(__u32 block, __u32 nr_blocks, void *buf)
{
+ ulong ret;
+
if (!cur_dev || !cur_dev->block_write)
return -1;
return -1;
}
- return cur_dev->block_write(cur_dev->dev,
- cur_part_info.start + block, nr_blocks, buf);
+ ret = cur_dev->block_write(cur_dev->dev,
+ cur_part_info.start + block,
+ nr_blocks, buf);
+ if (nr_blocks && ret == 0)
+ return -1;
+
+ return ret;
}
/*
__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;
/*
* Write at most 'maxsize' bytes from 'buffer' into
* the file associated with 'dentptr'
- * Return the number of bytes read or -1 on fatal errors.
+ * Update the number of bytes written in *gotsize and return 0
+ * or return -1 on fatal errors.
*/
static int
set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
- unsigned long maxsize)
+ loff_t maxsize, loff_t *gotsize)
{
- unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
+ loff_t filesize = FAT2CPU32(dentptr->size);
unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
__u32 curclust = START(dentptr);
__u32 endclust = 0, newclust = 0;
- unsigned long actsize;
+ loff_t actsize;
- debug("Filesize: %ld bytes\n", filesize);
+ *gotsize = 0;
+ debug("Filesize: %llu bytes\n", filesize);
if (maxsize > 0 && filesize > maxsize)
filesize = maxsize;
- debug("%ld bytes\n", filesize);
+ debug("%llu bytes\n", filesize);
actsize = bytesperclust;
endclust = curclust;
if (CHECK_CLUST(newclust, mydata->fatsize)) {
debug("curclust: 0x%x\n", newclust);
debug("Invalid FAT entry\n");
- return gotsize;
+ return 0;
}
endclust = newclust;
actsize += bytesperclust;
}
/* set remaining bytes */
- gotsize += (int)actsize;
+ *gotsize += actsize;
filesize -= actsize;
buffer += actsize;
actsize = filesize;
debug("error: writing cluster\n");
return -1;
}
- gotsize += actsize;
+ *gotsize += actsize;
/* Mark end of file in FAT */
if (mydata->fatsize == 16)
newclust = 0xfffffff;
set_fatent_value(mydata, endclust, newclust);
- return gotsize;
+ return 0;
getit:
if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
debug("error: writing cluster\n");
return -1;
}
- gotsize += (int)actsize;
+ *gotsize += actsize;
filesize -= actsize;
buffer += actsize;
if (CHECK_CLUST(curclust, mydata->fatsize)) {
debug("curclust: 0x%x\n", curclust);
debug("Invalid FAT entry\n");
- return gotsize;
+ return 0;
}
actsize = bytesperclust;
curclust = endclust = newclust;
* exceed the size of the block device
* Return -1 when overflow occurs, otherwise return 0
*/
-static int check_overflow(fsdata *mydata, __u32 clustnum, unsigned long size)
+static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size)
{
- __u32 startsect, sect_num;
+ __u32 startsect, sect_num, offset;
if (clustnum > 0) {
startsect = mydata->data_begin +
startsect = mydata->rootdir_sect;
}
- sect_num = size / mydata->sect_size;
- if (size % mydata->sect_size)
+ sect_num = div_u64_rem(size, mydata->sect_size, &offset);
+
+ if (offset != 0)
sect_num++;
if (startsect + sect_num > cur_part_info.start + total_sector)
return -1;
-
return 0;
}
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;
}
return NULL;
}
-static int do_fat_write(const char *filename, void *buffer,
- unsigned long size)
+static int do_fat_write(const char *filename, void *buffer, loff_t size,
+ loff_t *actwrite)
{
dir_entry *dentptr, *retdent;
__u32 startsect;
int cursect;
int ret = -1, name_len;
char l_filename[VFAT_MAXLEN_BYTES];
- int write_size = size;
+ *actwrite = size;
dir_curclust = 0;
if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
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;
ret = check_overflow(mydata, start_cluster, size);
if (ret) {
- printf("Error: %ld overflow\n", size);
+ printf("Error: %llu overflow\n", size);
goto exit;
}
goto exit;
}
- ret = set_contents(mydata, retdent, buffer, size);
+ ret = set_contents(mydata, retdent, buffer, size, actwrite);
if (ret < 0) {
printf("Error: writing contents\n");
goto exit;
}
- write_size = ret;
- debug("attempt to write 0x%x bytes\n", write_size);
+ debug("attempt to write 0x%llx bytes\n", *actwrite);
/* Flush fat buffer */
ret = flush_fat_buffer(mydata);
ret = check_overflow(mydata, start_cluster, size);
if (ret) {
- printf("Error: %ld overflow\n", size);
+ printf("Error: %llu overflow\n", size);
goto exit;
}
fill_dentry(mydata, empty_dentptr, filename,
start_cluster, size, 0x20);
- ret = set_contents(mydata, empty_dentptr, buffer, size);
+ ret = set_contents(mydata, empty_dentptr, buffer, size,
+ actwrite);
if (ret < 0) {
printf("Error: writing contents\n");
goto exit;
}
- write_size = ret;
- debug("attempt to write 0x%x bytes\n", write_size);
+ debug("attempt to write 0x%llx bytes\n", *actwrite);
/* Flush fat buffer */
ret = flush_fat_buffer(mydata);
exit:
free(mydata->fatbuf);
- return ret < 0 ? ret : write_size;
+ return ret;
}
-int file_fat_write(const char *filename, void *buffer, unsigned long maxsize)
+int file_fat_write(const char *filename, void *buffer, loff_t offset,
+ loff_t maxsize, loff_t *actwrite)
{
+ if (offset != 0) {
+ printf("Error: non zero offset is currently not suported.\n");
+ return -1;
+ }
+
printf("writing %s\n", filename);
- return do_fat_write(filename, buffer, maxsize);
+ return do_fat_write(filename, buffer, maxsize, actwrite);
}
projects / oweals / u-boot.git / blobdiff