#include <common.h>
#include <config.h>
+#include <exports.h>
#include <fat.h>
#include <asm/byteorder.h>
#include <part.h>
+#include <malloc.h>
+#include <linux/compiler.h>
/*
* Convert a string to lowercase.
*/
-static void downcase (char *str)
+static void downcase(char *str)
{
while (*str != '\0') {
TOLOWER(*str);
}
}
-static block_dev_desc_t *cur_dev = NULL;
+static block_dev_desc_t *cur_dev;
+static disk_partition_t cur_part_info;
-static unsigned long part_offset = 0;
-
-static int cur_part = 1;
-
-#define DOS_PART_TBL_OFFSET 0x1be
-#define DOS_PART_MAGIC_OFFSET 0x1fe
+#define DOS_BOOT_MAGIC_OFFSET 0x1fe
#define DOS_FS_TYPE_OFFSET 0x36
#define DOS_FS32_TYPE_OFFSET 0x52
-static int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
+static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
{
- if (cur_dev == NULL)
+ if (!cur_dev || !cur_dev->block_read)
return -1;
- startblock += part_offset;
-
- if (cur_dev->block_read) {
- return cur_dev->block_read(cur_dev->dev, startblock, getsize,
- (unsigned long *) bufptr);
- }
- return -1;
+ return cur_dev->block_read(cur_dev->dev,
+ cur_part_info.start + block, nr_blocks, buf);
}
-int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
+int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
{
- unsigned char buffer[SECTOR_SIZE];
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
- disk_partition_t info;
+ /* First close any currently found FAT filesystem */
+ cur_dev = NULL;
- if (!dev_desc->block_read)
- return -1;
-
- cur_dev = dev_desc;
- /* check if we have a MBR (on floppies we have only a PBR) */
- if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)buffer) != 1) {
- printf("** Can't read from device %d **\n",
- dev_desc->dev);
- return -1;
- }
- if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
- buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
- /* no signature found */
- return -1;
- }
#if (defined(CONFIG_CMD_IDE) || \
- defined(CONFIG_CMD_MG_DISK) || \
defined(CONFIG_CMD_SATA) || \
defined(CONFIG_CMD_SCSI) || \
defined(CONFIG_CMD_USB) || \
defined(CONFIG_MMC) || \
defined(CONFIG_SYSTEMACE) )
- /* First we assume there is a MBR */
- if (!get_partition_info(dev_desc, part_no, &info)) {
- part_offset = info.start;
- cur_part = part_no;
- } else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
- (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
- /* ok, we assume we are on a PBR only */
- cur_part = 1;
- part_offset = 0;
- } else {
- printf("** Partition %d not valid on device %d **\n",
- part_no, dev_desc->dev);
+
+ /* Read the partition table, if present */
+ if (!get_partition_info(dev_desc, part_no, &cur_part_info))
+ cur_dev = dev_desc;
+#endif
+
+ /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
+ if (!cur_dev) {
+ if (part_no != 0) {
+ printf("** Partition %d not valid on device %d **\n",
+ part_no, dev_desc->dev);
+ return -1;
+ }
+
+ cur_dev = dev_desc;
+ cur_part_info.start = 0;
+ cur_part_info.size = dev_desc->lba;
+ cur_part_info.blksz = dev_desc->blksz;
+ memset(cur_part_info.name, 0, sizeof(cur_part_info.name));
+ memset(cur_part_info.type, 0, sizeof(cur_part_info.type));
+ }
+
+ /* Make sure it has a valid FAT header */
+ if (disk_read(0, 1, buffer) != 1) {
+ cur_dev = NULL;
return -1;
}
-#else
- if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
- (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
- /* ok, we assume we are on a PBR only */
- cur_part = 1;
- part_offset = 0;
- info.start = part_offset;
- } else {
- /* FIXME we need to determine the start block of the
- * partition where the DOS FS resides. This can be done
- * by using the get_partition_info routine. For this
- * purpose the libpart must be included.
- */
- part_offset = 32;
- cur_part = 1;
+ /* Check if it's actually a DOS volume */
+ if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) {
+ cur_dev = NULL;
+ return -1;
}
-#endif
- return 0;
+
+ /* Check for FAT12/FAT16/FAT32 filesystem */
+ if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3))
+ return 0;
+ if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5))
+ return 0;
+
+ cur_dev = NULL;
+ return -1;
}
+
/*
* Get the first occurence of a directory delimiter ('/' or '\') in a string.
* Return index into string if found, -1 otherwise.
*/
-static int dirdelim (char *str)
+static int dirdelim(char *str)
{
char *start = str;
/*
* Extract zero terminated short name from a directory entry.
*/
-static void get_name (dir_entry *dirent, char *s_name)
+static void get_name(dir_entry *dirent, char *s_name)
{
char *ptr;
* Get the entry at index 'entry' in a FAT (12/16/32) table.
* On failure 0x00 is returned.
*/
-static __u32 get_fatent (fsdata *mydata, __u32 entry)
+static __u32 get_fatent(fsdata *mydata, __u32 entry)
{
__u32 bufnum;
__u32 off16, offset;
/* Read a new block of FAT entries into the cache. */
if (bufnum != mydata->fatbufnum) {
- int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
+ __u32 getsize = FATBUFBLOCKS;
__u8 *bufptr = mydata->fatbuf;
__u32 fatlength = mydata->fatlength;
__u32 startblock = bufnum * FATBUFBLOCKS;
- fatlength *= SECTOR_SIZE; /* We want it in bytes now */
+ if (startblock + getsize > fatlength)
+ getsize = fatlength - startblock;
+
startblock += mydata->fat_sect; /* Offset from start of disk */
- if (getsize > fatlength)
- getsize = fatlength;
if (disk_read(startblock, getsize, bufptr) < 0) {
debug("Error reading FAT blocks\n");
return ret;
* Return 0 on success, -1 otherwise.
*/
static int
-get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
- unsigned long size)
+get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
{
- int idx = 0;
+ __u32 idx = 0;
__u32 startsect;
+ int ret;
if (clustnum > 0) {
startsect = mydata->data_begin +
debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
- if (disk_read(startsect, size / FS_BLOCK_SIZE, buffer) < 0) {
- debug("Error reading data\n");
- return -1;
+ if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) {
+ ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
+
+ printf("FAT: Misaligned buffer address (%p)\n", buffer);
+
+ while (size >= mydata->sect_size) {
+ ret = disk_read(startsect++, 1, tmpbuf);
+ if (ret != 1) {
+ debug("Error reading data (got %d)\n", ret);
+ return -1;
+ }
+
+ memcpy(buffer, tmpbuf, mydata->sect_size);
+ buffer += mydata->sect_size;
+ size -= mydata->sect_size;
+ }
+ } else {
+ idx = size / mydata->sect_size;
+ ret = disk_read(startsect, idx, buffer);
+ if (ret != idx) {
+ debug("Error reading data (got %d)\n", ret);
+ return -1;
+ }
+ startsect += idx;
+ idx *= mydata->sect_size;
+ buffer += idx;
+ size -= idx;
}
- if (size % FS_BLOCK_SIZE) {
- __u8 tmpbuf[FS_BLOCK_SIZE];
+ if (size) {
+ ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
- idx = size / FS_BLOCK_SIZE;
- if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
- debug("Error reading data\n");
+ ret = disk_read(startsect, 1, tmpbuf);
+ if (ret != 1) {
+ debug("Error reading data (got %d)\n", ret);
return -1;
}
- buffer += idx * FS_BLOCK_SIZE;
- memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE);
- return 0;
+ memcpy(buffer, tmpbuf, size);
}
return 0;
}
/*
- * Read at most 'maxsize' bytes from the file associated with 'dentptr'
+ * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
* into 'buffer'.
* Return the number of bytes read or -1 on fatal errors.
*/
+__u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
+ __aligned(ARCH_DMA_MINALIGN);
+
static long
-get_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
- unsigned long maxsize)
+get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
+ __u8 *buffer, unsigned long maxsize)
{
unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
- unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE;
+ unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
__u32 curclust = START(dentptr);
__u32 endclust, newclust;
unsigned long actsize;
debug("Filesize: %ld bytes\n", filesize);
- if (maxsize > 0 && filesize > maxsize)
- filesize = maxsize;
+ if (pos >= filesize) {
+ debug("Read position past EOF: %lu\n", pos);
+ return gotsize;
+ }
+
+ if (maxsize > 0 && filesize > pos + maxsize)
+ filesize = pos + maxsize;
debug("%ld bytes\n", filesize);
+ actsize = bytesperclust;
+
+ /* go to cluster at pos */
+ while (actsize <= pos) {
+ curclust = get_fatent(mydata, curclust);
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", curclust);
+ debug("Invalid FAT entry\n");
+ return gotsize;
+ }
+ actsize += bytesperclust;
+ }
+
+ /* actsize > pos */
+ actsize -= bytesperclust;
+ filesize -= actsize;
+ pos -= actsize;
+
+ /* align to beginning of next cluster if any */
+ if (pos) {
+ actsize = min(filesize, bytesperclust);
+ if (get_cluster(mydata, curclust, get_contents_vfatname_block,
+ (int)actsize) != 0) {
+ printf("Error reading cluster\n");
+ return -1;
+ }
+ filesize -= actsize;
+ actsize -= pos;
+ memcpy(buffer, get_contents_vfatname_block + pos, actsize);
+ gotsize += actsize;
+ if (!filesize)
+ return gotsize;
+ buffer += actsize;
+
+ curclust = get_fatent(mydata, curclust);
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", curclust);
+ debug("Invalid FAT entry\n");
+ return gotsize;
+ }
+ }
+
actsize = bytesperclust;
endclust = curclust;
actsize += bytesperclust;
}
- /* actsize >= file size */
- actsize -= bytesperclust;
-
- /* get remaining clusters */
- if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
- printf("Error reading cluster\n");
- return -1;
- }
-
/* get remaining bytes */
- gotsize += (int)actsize;
- filesize -= actsize;
- buffer += actsize;
actsize = filesize;
- if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
+ if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
printf("Error reading cluster\n");
return -1;
}
* starting at l_name[*idx].
* Return 1 if terminator (zero byte) is found, 0 otherwise.
*/
-static int slot2str (dir_slot *slotptr, char *l_name, int *idx)
+static int slot2str(dir_slot *slotptr, char *l_name, int *idx)
{
int j;
* into 'retdent'
* Return 0 on success, -1 otherwise.
*/
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 get_vfatname_block[MAX_CLUSTSIZE];
-
static int
-get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
- dir_entry *retdent, char *l_name)
+get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
+ dir_entry *retdent, char *l_name)
{
dir_entry *realdent;
dir_slot *slotptr = (dir_slot *)retdent;
- __u8 *buflimit = cluster + ((curclust == 0) ?
- LINEAR_PREFETCH_SIZE :
- (mydata->clust_size * SECTOR_SIZE)
- );
+ __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
+ PREFETCH_BLOCKS :
+ mydata->clust_size);
__u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
int idx = 0;
return -1;
}
- if (get_cluster(mydata, curclust, get_vfatname_block,
- mydata->clust_size * SECTOR_SIZE) != 0) {
+ if (get_cluster(mydata, curclust, get_contents_vfatname_block,
+ mydata->clust_size * mydata->sect_size) != 0) {
debug("Error: reading directory block\n");
return -1;
}
- slotptr2 = (dir_slot *)get_vfatname_block;
+ slotptr2 = (dir_slot *)get_contents_vfatname_block;
while (counter > 0) {
if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
& 0xff) != counter)
/* Save the real directory entry */
realdent = (dir_entry *)slotptr2;
- while ((__u8 *)slotptr2 > get_vfatname_block) {
+ while ((__u8 *)slotptr2 > get_contents_vfatname_block) {
slotptr2--;
slot2str(slotptr2, l_name, &idx);
}
}
/* Calculate short name checksum */
-static __u8 mkcksum (const char *str)
+static __u8 mkcksum(const char name[8], const char ext[3])
{
int i;
__u8 ret = 0;
- for (i = 0; i < 11; i++) {
- ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
- }
+ for (i = 0; i < sizeof(name); i++)
+ ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i];
+ for (i = 0; i < sizeof(ext); i++)
+ ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i];
return ret;
}
* Get the directory entry associated with 'filename' from the directory
* starting at 'startsect'
*/
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 get_dentfromdir_block[MAX_CLUSTSIZE];
+__u8 get_dentfromdir_block[MAX_CLUSTSIZE]
+ __aligned(ARCH_DMA_MINALIGN);
-static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
- char *filename, dir_entry *retdent,
- int dols)
+static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
+ char *filename, dir_entry *retdent,
+ int dols)
{
__u16 prevcksum = 0xffff;
__u32 curclust = START(retdent);
int i;
if (get_cluster(mydata, curclust, get_dentfromdir_block,
- mydata->clust_size * SECTOR_SIZE) != 0) {
+ mydata->clust_size * mydata->sect_size) != 0) {
debug("Error: reading directory block\n");
return NULL;
}
}
if ((dentptr->attr & ATTR_VOLUME)) {
#ifdef CONFIG_SUPPORT_VFAT
- if ((dentptr->attr & ATTR_VFAT) &&
- (dentptr-> name[0] & LAST_LONG_ENTRY_MASK)) {
+ if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
+ (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
prevcksum = ((dir_slot *)dentptr)->alias_checksum;
get_vfatname(mydata, curclust,
get_dentfromdir_block,
return NULL;
}
#ifdef CONFIG_SUPPORT_VFAT
- if (dols && mkcksum(dentptr->name) == prevcksum) {
+ __u8 csum = mkcksum(dentptr->name, dentptr->ext);
+ if (dols && csum == prevcksum) {
+ prevcksum = 0xffff;
dentptr++;
continue;
}
* Read boot sector and volume info from a FAT filesystem
*/
static int
-read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize)
+read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
{
- __u8 block[FS_BLOCK_SIZE];
-
+ __u8 *block;
volume_info *vistart;
+ int ret = 0;
- if (disk_read (0, 1, block) < 0) {
- debug("Error: reading block\n");
+ if (cur_dev == NULL) {
+ debug("Error: no device selected\n");
+ return -1;
+ }
+
+ block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
+ if (block == NULL) {
+ debug("Error: allocating block\n");
return -1;
}
+ if (disk_read(0, 1, block) < 0) {
+ debug("Error: reading block\n");
+ goto fail;
+ }
+
memcpy(bs, block, sizeof(boot_sector));
bs->reserved = FAT2CPU16(bs->reserved);
bs->fat_length = FAT2CPU16(bs->fat_length);
if (*fatsize == 32) {
if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
- return 0;
+ goto exit;
} else {
if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
*fatsize = 12;
- return 0;
+ goto exit;
}
if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
*fatsize = 16;
- return 0;
+ goto exit;
}
}
debug("Error: broken fs_type sign\n");
- return -1;
+fail:
+ ret = -1;
+exit:
+ free(block);
+ return ret;
}
-__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
-__u8 do_fat_read_block[MAX_CLUSTSIZE];
+__u8 do_fat_read_at_block[MAX_CLUSTSIZE]
+ __aligned(ARCH_DMA_MINALIGN);
long
-do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
- int dols)
+do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+ unsigned long maxsize, int dols)
{
char fnamecopy[2048];
boot_sector bs;
volume_info volinfo;
fsdata datablock;
fsdata *mydata = &datablock;
- dir_entry *dentptr;
+ dir_entry *dentptr = NULL;
__u16 prevcksum = 0xffff;
char *subname = "";
- int cursect;
+ __u32 cursect;
int idx, isdir = 0;
int files = 0, dirs = 0;
- long ret = 0;
+ long ret = -1;
int firsttime;
- int root_cluster;
+ __u32 root_cluster = 0;
+ int rootdir_size = 0;
int j;
if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
return -1;
}
- root_cluster = bs.root_cluster;
-
- if (mydata->fatsize == 32)
+ if (mydata->fatsize == 32) {
+ root_cluster = bs.root_cluster;
mydata->fatlength = bs.fat32_length;
- else
+ } else {
mydata->fatlength = bs.fat_length;
+ }
mydata->fat_sect = bs.reserved;
cursect = mydata->rootdir_sect
= mydata->fat_sect + mydata->fatlength * bs.fats;
+ mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
mydata->clust_size = bs.cluster_size;
+ if (mydata->sect_size != cur_part_info.blksz) {
+ printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
+ mydata->sect_size, cur_part_info.blksz);
+ return -1;
+ }
if (mydata->fatsize == 32) {
mydata->data_begin = mydata->rootdir_sect -
(mydata->clust_size * 2);
} else {
- int rootdir_size;
-
rootdir_size = ((bs.dir_entries[1] * (int)256 +
bs.dir_entries[0]) *
sizeof(dir_entry)) /
- SECTOR_SIZE;
+ mydata->sect_size;
mydata->data_begin = mydata->rootdir_sect +
rootdir_size -
(mydata->clust_size * 2);
}
mydata->fatbufnum = -1;
+ mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
+ if (mydata->fatbuf == NULL) {
+ debug("Error: allocating memory\n");
+ return -1;
+ }
#ifdef CONFIG_SUPPORT_VFAT
debug("VFAT Support enabled\n");
"Data begins at: %d\n",
root_cluster,
mydata->rootdir_sect,
- mydata->rootdir_sect * SECTOR_SIZE, mydata->data_begin);
- debug("Cluster size: %d\n", mydata->clust_size);
+ mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
+ debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
+ mydata->clust_size);
/* "cwd" is always the root... */
while (ISDIRDELIM(*filename))
if (*fnamecopy == '\0') {
if (!dols)
- return -1;
+ goto exit;
dols = LS_ROOT;
} else if ((idx = dirdelim(fnamecopy)) >= 0) {
while (1) {
int i;
- debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%d\n",
- cursect, mydata->clust_size, DIRENTSPERBLOCK);
+ if (j == 0) {
+ debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
+ cursect, mydata->clust_size, DIRENTSPERBLOCK);
+
+ if (disk_read(cursect,
+ (mydata->fatsize == 32) ?
+ (mydata->clust_size) :
+ PREFETCH_BLOCKS,
+ do_fat_read_at_block) < 0) {
+ debug("Error: reading rootdir block\n");
+ goto exit;
+ }
- if (disk_read(cursect,
- (mydata->fatsize == 32) ?
- (mydata->clust_size) :
- LINEAR_PREFETCH_SIZE,
- do_fat_read_block) < 0) {
- debug("Error: reading rootdir block\n");
- return -1;
+ dentptr = (dir_entry *) do_fat_read_at_block;
}
- dentptr = (dir_entry *) do_fat_read_block;
-
for (i = 0; i < DIRENTSPERBLOCK; i++) {
char s_name[14], l_name[VFAT_MAXLEN_BYTES];
+ __u8 csum;
l_name[0] = '\0';
if (dentptr->name[0] == DELETED_FLAG) {
dentptr++;
continue;
}
- if ((dentptr->attr & ATTR_VOLUME)) {
+
+ csum = mkcksum(dentptr->name, dentptr->ext);
+ if (dentptr->attr & ATTR_VOLUME) {
#ifdef CONFIG_SUPPORT_VFAT
- if ((dentptr->attr & ATTR_VFAT) &&
+ if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
(dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
prevcksum =
((dir_slot *)dentptr)->alias_checksum;
get_vfatname(mydata,
- (mydata->fatsize == 32) ?
- root_cluster :
- 0,
- do_fat_read_block,
+ root_cluster,
+ do_fat_read_at_block,
dentptr, l_name);
if (dols == LS_ROOT) {
if (dols == LS_ROOT) {
printf("\n%d file(s), %d dir(s)\n\n",
files, dirs);
- return 0;
+ ret = 0;
}
- return -1;
+ goto exit;
}
#ifdef CONFIG_SUPPORT_VFAT
- else if (dols == LS_ROOT &&
- mkcksum(dentptr->name) == prevcksum) {
+ else if (dols == LS_ROOT && csum == prevcksum) {
+ prevcksum = 0xffff;
dentptr++;
continue;
}
}
if (isdir && !(dentptr->attr & ATTR_DIR))
- return -1;
+ goto exit;
debug("RootName: %s", s_name);
debug(", start: 0x%x", START(dentptr));
* root directory clusters when a cluster has been
* completely processed.
*/
- if ((mydata->fatsize == 32) && (++j == mydata->clust_size)) {
- int nxtsect;
- int nxt_clust;
-
- nxt_clust = get_fatent(mydata, root_cluster);
+ ++j;
+ int rootdir_end = 0;
+ if (mydata->fatsize == 32) {
+ if (j == mydata->clust_size) {
+ int nxtsect = 0;
+ int nxt_clust = 0;
- nxtsect = mydata->data_begin +
- (nxt_clust * mydata->clust_size);
+ nxt_clust = get_fatent(mydata, root_cluster);
+ rootdir_end = CHECK_CLUST(nxt_clust, 32);
- debug("END LOOP: sect=%d, root_clust=%d, "
- "n_sect=%d, n_clust=%d\n",
- cursect, root_cluster,
- nxtsect, nxt_clust);
+ nxtsect = mydata->data_begin +
+ (nxt_clust * mydata->clust_size);
- root_cluster = nxt_clust;
+ root_cluster = nxt_clust;
- cursect = nxtsect;
- j = 0;
+ cursect = nxtsect;
+ j = 0;
+ }
} else {
- cursect++;
+ if (j == PREFETCH_BLOCKS)
+ j = 0;
+
+ rootdir_end = (++cursect - mydata->rootdir_sect >=
+ rootdir_size);
+ }
+
+ /* If end of rootdir reached */
+ if (rootdir_end) {
+ if (dols == LS_ROOT) {
+ printf("\n%d file(s), %d dir(s)\n\n",
+ files, dirs);
+ ret = 0;
+ }
+ goto exit;
}
}
rootdir_done:
if (get_dentfromdir(mydata, startsect, subname, dentptr,
isdir ? 0 : dols) == NULL) {
if (dols && !isdir)
- return 0;
- return -1;
+ ret = 0;
+ goto exit;
}
- if (idx >= 0) {
- if (!(dentptr->attr & ATTR_DIR))
- return -1;
+ if (isdir && !(dentptr->attr & ATTR_DIR))
+ goto exit;
+
+ if (idx >= 0)
subname = nextname;
- }
}
- ret = get_contents(mydata, dentptr, buffer, maxsize);
+ ret = get_contents(mydata, dentptr, pos, buffer, maxsize);
debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
+exit:
+ free(mydata->fatbuf);
return ret;
}
-int file_fat_detectfs (void)
+long
+do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
+{
+ return do_fat_read_at(filename, 0, buffer, maxsize, dols);
+}
+
+int file_fat_detectfs(void)
{
boot_sector bs;
volume_info volinfo;
}
#if defined(CONFIG_CMD_IDE) || \
- defined(CONFIG_CMD_MG_DISK) || \
defined(CONFIG_CMD_SATA) || \
defined(CONFIG_CMD_SCSI) || \
defined(CONFIG_CMD_USB) || \
vol_label[11] = '\0';
volinfo.fs_type[5] = '\0';
- printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part,
- volinfo.fs_type, vol_label);
+ printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label);
return 0;
}
-int file_fat_ls (const char *dir)
+int file_fat_ls(const char *dir)
{
return do_fat_read(dir, NULL, 0, LS_YES);
}
-long file_fat_read (const char *filename, void *buffer, unsigned long maxsize)
+long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
+ unsigned long maxsize)
{
printf("reading %s\n", filename);
- return do_fat_read(filename, buffer, maxsize, LS_NO);
+ return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO);
+}
+
+long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+ return file_fat_read_at(filename, 0, buffer, maxsize);
}
projects / karo-tx-uboot.git / blobdiff