* 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
* 2003-03-10 - kharris@nexus-tech.net - ported to uboot
*
- * 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>
+#include <blk.h>
#include <config.h>
#include <exports.h>
#include <fat.h>
#include <asm/byteorder.h>
#include <part.h>
#include <malloc.h>
+#include <memalign.h>
#include <linux/compiler.h>
+#include <linux/ctype.h>
+
+#ifdef CONFIG_SUPPORT_VFAT
+static const int vfat_enabled = 1;
+#else
+static const int vfat_enabled = 0;
+#endif
/*
* Convert a string to lowercase.
static void downcase(char *str)
{
while (*str != '\0') {
- TOLOWER(*str);
+ *str = tolower(*str);
str++;
}
}
-static block_dev_desc_t *cur_dev;
-static unsigned int cur_part_nr;
+static struct blk_desc *cur_dev;
static disk_partition_t cur_part_info;
#define DOS_BOOT_MAGIC_OFFSET 0x1fe
static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
{
- if (!cur_dev || !cur_dev->block_read)
+ ulong ret;
+
+ if (!cur_dev)
return -1;
- return cur_dev->block_read(cur_dev->dev,
- cur_part_info.start + block, nr_blocks, buf);
+ ret = blk_dread(cur_dev, cur_part_info.start + block, nr_blocks, buf);
+
+ if (nr_blocks && ret == 0)
+ return -1;
+
+ return ret;
}
-int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
+int fat_set_blk_dev(struct blk_desc *dev_desc, disk_partition_t *info)
{
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
- /* First close any currently found FAT filesystem */
- cur_dev = NULL;
-
-#if (defined(CONFIG_CMD_IDE) || \
- defined(CONFIG_CMD_SATA) || \
- defined(CONFIG_CMD_SCSI) || \
- defined(CONFIG_CMD_USB) || \
- defined(CONFIG_MMC) || \
- defined(CONFIG_SYSTEMACE) )
-
- /* Read the partition table, if present */
- if (!get_partition_info(dev_desc, part_no, &cur_part_info)) {
- cur_dev = dev_desc;
- cur_part_nr = part_no;
- }
-#endif
-
- /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
- if (!cur_dev) {
- if (part_no != 1) {
- printf("** Partition %d not valid on device %d **\n",
- part_no, dev_desc->dev);
- return -1;
- }
-
- cur_dev = dev_desc;
- cur_part_nr = 1;
- 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));
- }
+ cur_dev = dev_desc;
+ cur_part_info = *info;
/* Make sure it has a valid FAT header */
if (disk_read(0, 1, buffer) != 1) {
return -1;
}
+int fat_register_device(struct blk_desc *dev_desc, int part_no)
+{
+ disk_partition_t info;
+
+ /* First close any currently found FAT filesystem */
+ cur_dev = NULL;
+
+ /* Read the partition table, if present */
+ if (part_get_info(dev_desc, part_no, &info)) {
+ if (part_no != 0) {
+ printf("** Partition %d not valid on device %d **\n",
+ part_no, dev_desc->devnum);
+ return -1;
+ }
+
+ info.start = 0;
+ info.size = dev_desc->lba;
+ info.blksz = dev_desc->blksz;
+ info.name[0] = 0;
+ info.type[0] = 0;
+ info.bootable = 0;
+#ifdef CONFIG_PARTITION_UUIDS
+ info.uuid[0] = 0;
+#endif
+ }
+
+ return fat_set_blk_dev(dev_desc, &info);
+}
/*
* Get the first occurence of a directory delimiter ('/' or '\') in a string.
/*
* 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.
+ * Update the number of bytes read in *gotsize or return -1 on fatal errors.
*/
__u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
__aligned(ARCH_DMA_MINALIGN);
-static long
-get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
- __u8 *buffer, unsigned long maxsize)
+static int get_contents(fsdata *mydata, dir_entry *dentptr, loff_t pos,
+ __u8 *buffer, 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, newclust;
- unsigned long actsize;
+ loff_t actsize;
- debug("Filesize: %ld bytes\n", filesize);
+ *gotsize = 0;
+ debug("Filesize: %llu bytes\n", filesize);
if (pos >= filesize) {
- debug("Read position past EOF: %lu\n", pos);
- return gotsize;
+ debug("Read position past EOF: %llu\n", pos);
+ return 0;
}
if (maxsize > 0 && filesize > pos + maxsize)
filesize = pos + maxsize;
- debug("%ld bytes\n", filesize);
+ debug("%llu bytes\n", filesize);
actsize = bytesperclust;
if (CHECK_CLUST(curclust, mydata->fatsize)) {
debug("curclust: 0x%x\n", curclust);
debug("Invalid FAT entry\n");
- return gotsize;
+ return 0;
}
actsize += bytesperclust;
}
/* align to beginning of next cluster if any */
if (pos) {
- actsize = min(filesize, bytesperclust);
+ actsize = min(filesize, (loff_t)bytesperclust);
if (get_cluster(mydata, curclust, get_contents_vfatname_block,
(int)actsize) != 0) {
printf("Error reading cluster\n");
filesize -= actsize;
actsize -= pos;
memcpy(buffer, get_contents_vfatname_block + pos, actsize);
- gotsize += actsize;
+ *gotsize += actsize;
if (!filesize)
- return gotsize;
+ return 0;
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;
+ return 0;
}
}
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;
printf("Error reading cluster\n");
return -1;
}
- gotsize += actsize;
- return gotsize;
+ *gotsize += actsize;
+ return 0;
getit:
if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
printf("Error reading cluster\n");
return -1;
}
- gotsize += (int)actsize;
+ *gotsize += (int)actsize;
filesize -= actsize;
buffer += actsize;
if (CHECK_CLUST(curclust, mydata->fatsize)) {
debug("curclust: 0x%x\n", curclust);
printf("Invalid FAT entry\n");
- return gotsize;
+ return 0;
}
actsize = bytesperclust;
endclust = curclust;
} while (1);
}
-#ifdef CONFIG_SUPPORT_VFAT
/*
* Extract the file name information from 'slotptr' into 'l_name',
* starting at 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 < 8; i++)
+ ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i];
+ for (i = 0; i < 3; i++)
+ ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i];
return ret;
}
-#endif /* CONFIG_SUPPORT_VFAT */
/*
* Get the directory entry associated with 'filename' from the directory
continue;
}
if ((dentptr->attr & ATTR_VOLUME)) {
-#ifdef CONFIG_SUPPORT_VFAT
- if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
+ if (vfat_enabled &&
+ (dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
(dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
prevcksum = ((dir_slot *)dentptr)->alias_checksum;
get_vfatname(mydata, curclust,
}
if (doit) {
if (dirc == ' ') {
- printf(" %8ld %s%c\n",
- (long)FAT2CPU32(dentptr->size),
+ printf(" %8u %s%c\n",
+ FAT2CPU32(dentptr->size),
l_name,
dirc);
} else {
continue;
}
debug("vfatname: |%s|\n", l_name);
- } else
-#endif
- {
+ } else {
/* Volume label or VFAT entry */
dentptr++;
continue;
debug("Dentname == NULL - %d\n", i);
return NULL;
}
-#ifdef CONFIG_SUPPORT_VFAT
- if (dols && mkcksum(dentptr->name) == prevcksum) {
- prevcksum = 0xffff;
- dentptr++;
- continue;
+ if (vfat_enabled) {
+ __u8 csum = mkcksum(dentptr->name, dentptr->ext);
+ if (dols && csum == prevcksum) {
+ prevcksum = 0xffff;
+ dentptr++;
+ continue;
+ }
}
-#endif
+
get_name(dentptr, s_name);
if (dols) {
int isdir = (dentptr->attr & ATTR_DIR);
if (doit) {
if (dirc == ' ') {
- printf(" %8ld %s%c\n",
- (long)FAT2CPU32(dentptr->size),
+ printf(" %8u %s%c\n",
+ FAT2CPU32(dentptr->size),
s_name, dirc);
} else {
printf(" %s%c\n",
__u8 do_fat_read_at_block[MAX_CLUSTSIZE]
__aligned(ARCH_DMA_MINALIGN);
-long
-do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
- unsigned long maxsize, int dols)
+int do_fat_read_at(const char *filename, loff_t pos, void *buffer,
+ loff_t maxsize, int dols, int dogetsize, loff_t *size)
{
char fnamecopy[2048];
boot_sector bs;
__u32 cursect;
int idx, isdir = 0;
int files = 0, dirs = 0;
- long ret = -1;
+ int ret = -1;
int firsttime;
__u32 root_cluster = 0;
+ __u32 read_blk;
int rootdir_size = 0;
- int j;
+ int buffer_blk_cnt;
+ int do_read;
+ __u8 *dir_ptr;
if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
debug("Error: reading boot sector\n");
return -1;
}
-#ifdef CONFIG_SUPPORT_VFAT
- debug("VFAT Support enabled\n");
-#endif
+ if (vfat_enabled)
+ debug("VFAT Support enabled\n");
+
debug("FAT%d, fat_sect: %d, fatlength: %d\n",
mydata->fatsize, mydata->fat_sect, mydata->fatlength);
debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
strcpy(fnamecopy, filename);
downcase(fnamecopy);
+root_reparse:
if (*fnamecopy == '\0') {
if (!dols)
goto exit;
isdir = 1;
}
- j = 0;
+ buffer_blk_cnt = 0;
+ firsttime = 1;
while (1) {
int i;
- if (j == 0) {
- debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
- cursect, mydata->clust_size, DIRENTSPERBLOCK);
+ if (mydata->fatsize == 32 || firsttime) {
+ dir_ptr = do_fat_read_at_block;
+ firsttime = 0;
+ } else {
+ /**
+ * FAT16 sector buffer modification:
+ * Each loop, the second buffered block is moved to
+ * the buffer begin, and two next sectors are read
+ * next to the previously moved one. So the sector
+ * buffer keeps always 3 sectors for fat16.
+ * And the current sector is the buffer second sector
+ * beside the "firsttime" read, when it is the first one.
+ *
+ * PREFETCH_BLOCKS is 2 for FAT16 == loop[0:1]
+ * n = computed root dir sector
+ * loop | cursect-1 | cursect | cursect+1 |
+ * 0 | sector n+0 | sector n+1 | none |
+ * 1 | none | sector n+0 | sector n+1 |
+ * 0 | sector n+1 | sector n+2 | sector n+3 |
+ * 1 | sector n+3 | ...
+ */
+ dir_ptr = (do_fat_read_at_block + mydata->sect_size);
+ memcpy(do_fat_read_at_block, dir_ptr, mydata->sect_size);
+ }
+
+ do_read = 1;
+
+ if (mydata->fatsize == 32 && buffer_blk_cnt)
+ do_read = 0;
+
+ if (do_read) {
+ read_blk = (mydata->fatsize == 32) ?
+ mydata->clust_size : PREFETCH_BLOCKS;
- if (disk_read(cursect,
- (mydata->fatsize == 32) ?
- (mydata->clust_size) :
- PREFETCH_BLOCKS,
- do_fat_read_at_block) < 0) {
+ debug("FAT read(sect=%d, cnt:%d), clust_size=%d, DIRENTSPERBLOCK=%zd\n",
+ cursect, read_blk, mydata->clust_size, DIRENTSPERBLOCK);
+
+ if (disk_read(cursect, read_blk, dir_ptr) < 0) {
debug("Error: reading rootdir block\n");
goto exit;
}
- dentptr = (dir_entry *) do_fat_read_at_block;
+ dentptr = (dir_entry *)dir_ptr;
}
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)) {
-#ifdef CONFIG_SUPPORT_VFAT
- if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
+
+ if (vfat_enabled)
+ csum = mkcksum(dentptr->name, dentptr->ext);
+
+ if (dentptr->attr & ATTR_VOLUME) {
+ if (vfat_enabled &&
+ (dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
(dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
prevcksum =
((dir_slot *)dentptr)->alias_checksum;
get_vfatname(mydata,
root_cluster,
- do_fat_read_at_block,
+ dir_ptr,
dentptr, l_name);
if (dols == LS_ROOT) {
}
if (doit) {
if (dirc == ' ') {
- printf(" %8ld %s%c\n",
- (long)FAT2CPU32(dentptr->size),
+ printf(" %8u %s%c\n",
+ FAT2CPU32(dentptr->size),
l_name,
dirc);
} else {
}
debug("Rootvfatname: |%s|\n",
l_name);
- } else
-#endif
- {
+ } else {
/* Volume label or VFAT entry */
dentptr++;
continue;
}
goto exit;
}
-#ifdef CONFIG_SUPPORT_VFAT
- else if (dols == LS_ROOT &&
- mkcksum(dentptr->name) == prevcksum) {
+ else if (vfat_enabled &&
+ dols == LS_ROOT && csum == prevcksum) {
prevcksum = 0xffff;
dentptr++;
continue;
}
-#endif
+
get_name(dentptr, s_name);
if (dols == LS_ROOT) {
}
if (doit) {
if (dirc == ' ') {
- printf(" %8ld %s%c\n",
- (long)FAT2CPU32(dentptr->size),
+ printf(" %8u %s%c\n",
+ FAT2CPU32(dentptr->size),
s_name, dirc);
} else {
printf(" %s%c\n",
goto rootdir_done; /* We got a match */
}
- debug("END LOOP: j=%d clust_size=%d\n", j,
+ debug("END LOOP: buffer_blk_cnt=%d clust_size=%d\n", buffer_blk_cnt,
mydata->clust_size);
/*
* root directory clusters when a cluster has been
* completely processed.
*/
- ++j;
+ ++buffer_blk_cnt;
int rootdir_end = 0;
if (mydata->fatsize == 32) {
- if (j == mydata->clust_size) {
+ if (buffer_blk_cnt == mydata->clust_size) {
int nxtsect = 0;
int nxt_clust = 0;
root_cluster = nxt_clust;
cursect = nxtsect;
- j = 0;
+ buffer_blk_cnt = 0;
}
} else {
- if (j == PREFETCH_BLOCKS)
- j = 0;
+ if (buffer_blk_cnt == PREFETCH_BLOCKS)
+ buffer_blk_cnt = 0;
rootdir_end = (++cursect - mydata->rootdir_sect >=
rootdir_size);
if (dols == LS_ROOT) {
printf("\n%d file(s), %d dir(s)\n\n",
files, dirs);
- ret = 0;
+ *size = 0;
}
goto exit;
}
if (get_dentfromdir(mydata, startsect, subname, dentptr,
isdir ? 0 : dols) == NULL) {
if (dols && !isdir)
- ret = 0;
+ *size = 0;
goto exit;
}
if (isdir && !(dentptr->attr & ATTR_DIR))
goto exit;
+ /*
+ * If we are looking for a directory, and found a directory
+ * type entry, and the entry is for the root directory (as
+ * denoted by a cluster number of 0), jump back to the start
+ * of the function, since at least on FAT12/16, the root dir
+ * lives in a hard-coded location and needs special handling
+ * to parse, rather than simply following the cluster linked
+ * list in the FAT, like other directories.
+ */
+ if (isdir && (dentptr->attr & ATTR_DIR) && !START(dentptr)) {
+ /*
+ * Modify the filename to remove the prefix that gets
+ * back to the root directory, so the initial root dir
+ * parsing code can continue from where we are without
+ * confusion.
+ */
+ strcpy(fnamecopy, nextname ?: "");
+ /*
+ * Set up state the same way as the function does when
+ * first started. This is required for the root dir
+ * parsing code operates in its expected environment.
+ */
+ subname = "";
+ cursect = mydata->rootdir_sect;
+ isdir = 0;
+ goto root_reparse;
+ }
+
if (idx >= 0)
subname = nextname;
}
- ret = get_contents(mydata, dentptr, pos, buffer, maxsize);
- debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
+ if (dogetsize) {
+ *size = FAT2CPU32(dentptr->size);
+ ret = 0;
+ } else {
+ ret = get_contents(mydata, dentptr, pos, buffer, maxsize, size);
+ }
+ debug("Size: %u, got: %llu\n", FAT2CPU32(dentptr->size), *size);
exit:
free(mydata->fatbuf);
return ret;
}
-long
-do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
+int do_fat_read(const char *filename, void *buffer, loff_t maxsize, int dols,
+ loff_t *actread)
{
- return do_fat_read_at(filename, 0, buffer, maxsize, dols);
+ return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0, actread);
}
int file_fat_detectfs(void)
#if defined(CONFIG_CMD_IDE) || \
defined(CONFIG_CMD_SATA) || \
- defined(CONFIG_CMD_SCSI) || \
+ defined(CONFIG_SCSI) || \
defined(CONFIG_CMD_USB) || \
defined(CONFIG_MMC)
printf("Interface: ");
printf("Unknown");
}
- printf("\n Device %d: ", cur_dev->dev);
+ printf("\n Device %d: ", cur_dev->devnum);
dev_print(cur_dev);
#endif
vol_label[11] = '\0';
volinfo.fs_type[5] = '\0';
- printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr,
- volinfo.fs_type, vol_label);
+ printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label);
return 0;
}
int file_fat_ls(const char *dir)
{
- return do_fat_read(dir, NULL, 0, LS_YES);
+ loff_t size;
+
+ return do_fat_read(dir, NULL, 0, LS_YES, &size);
}
-long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
- unsigned long maxsize)
+int fat_exists(const char *filename)
+{
+ int ret;
+ loff_t size;
+
+ ret = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, &size);
+ return ret == 0;
+}
+
+int fat_size(const char *filename, loff_t *size)
+{
+ return do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, size);
+}
+
+int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
+ loff_t maxsize, loff_t *actread)
{
printf("reading %s\n", filename);
- return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO);
+ return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0,
+ actread);
+}
+
+int file_fat_read(const char *filename, void *buffer, int maxsize)
+{
+ loff_t actread;
+ int ret;
+
+ ret = file_fat_read_at(filename, 0, buffer, maxsize, &actread);
+ if (ret)
+ return ret;
+ else
+ return actread;
+}
+
+int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actread)
+{
+ int ret;
+
+ ret = file_fat_read_at(filename, offset, buf, len, actread);
+ if (ret)
+ printf("** Unable to read file %s **\n", filename);
+
+ return ret;
}
-long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
+void fat_close(void)
{
- return file_fat_read_at(filename, 0, buffer, maxsize);
}
projects / u-boot / blobdiff