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![Andreas Bießmann](/assets/img/avatar_default.png)
The DIRENTSPERBLOCK utilizes sizeof() which will return a size_t which has no fixed size. Therefor use correct length modifer for printf() statement to prevent compiler warnings. This patch fixes following warning: ---8<--- fat.c: In function 'do_fat_read': fat.c:879: warning: format '%d' expects type 'int', but argument 4 has type 'long unsigned int' --->8--- Signed-off-by: Andreas Bießmann <biessmann@corscience.de> cc: Mike Frysinger <vapier@gentoo.org> cc: Thomas Chou <thomas@wytron.com.tw> cc: rjones@nexus-tech.net cc: kharris@nexus-tech.net Acked-by: Mike Frysinger <vapier@gentoo.org>
1189 lines
26 KiB
C
1189 lines
26 KiB
C
/*
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* fat.c
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*
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* R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
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*
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* 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
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* 2003-03-10 - kharris@nexus-tech.net - ported to uboot
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <config.h>
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#include <exports.h>
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#include <fat.h>
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#include <asm/byteorder.h>
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#include <part.h>
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/*
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* Convert a string to lowercase.
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*/
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static void downcase (char *str)
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{
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while (*str != '\0') {
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TOLOWER(*str);
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str++;
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}
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}
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static block_dev_desc_t *cur_dev = NULL;
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static unsigned long part_offset = 0;
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static int cur_part = 1;
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#define DOS_PART_TBL_OFFSET 0x1be
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#define DOS_PART_MAGIC_OFFSET 0x1fe
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#define DOS_FS_TYPE_OFFSET 0x36
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#define DOS_FS32_TYPE_OFFSET 0x52
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static int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
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{
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if (cur_dev == NULL)
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return -1;
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startblock += part_offset;
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if (cur_dev->block_read) {
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return cur_dev->block_read(cur_dev->dev, startblock, getsize,
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(unsigned long *) bufptr);
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}
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return -1;
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}
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int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
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{
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unsigned char buffer[dev_desc->blksz];
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if (!dev_desc->block_read)
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return -1;
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cur_dev = dev_desc;
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/* check if we have a MBR (on floppies we have only a PBR) */
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if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *)buffer) != 1) {
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printf("** Can't read from device %d **\n",
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dev_desc->dev);
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return -1;
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}
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if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
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buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
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/* no signature found */
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return -1;
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}
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#if (defined(CONFIG_CMD_IDE) || \
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defined(CONFIG_CMD_MG_DISK) || \
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defined(CONFIG_CMD_SATA) || \
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defined(CONFIG_CMD_SCSI) || \
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defined(CONFIG_CMD_USB) || \
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defined(CONFIG_MMC) || \
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defined(CONFIG_SYSTEMACE) )
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{
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disk_partition_t info;
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/* First we assume there is a MBR */
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if (!get_partition_info(dev_desc, part_no, &info)) {
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part_offset = info.start;
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cur_part = part_no;
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} else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],
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"FAT", 3) == 0) ||
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(strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET],
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"FAT32", 5) == 0)) {
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/* ok, we assume we are on a PBR only */
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cur_part = 1;
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part_offset = 0;
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} else {
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printf("** Partition %d not valid on device %d **\n",
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part_no, dev_desc->dev);
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return -1;
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}
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}
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#else
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if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) ||
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(strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET], "FAT32", 5) == 0)) {
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/* ok, we assume we are on a PBR only */
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cur_part = 1;
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part_offset = 0;
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} else {
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/* FIXME we need to determine the start block of the
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* partition where the DOS FS resides. This can be done
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* by using the get_partition_info routine. For this
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* purpose the libpart must be included.
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*/
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part_offset = 32;
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cur_part = 1;
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}
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#endif
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return 0;
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}
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/*
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* Get the first occurence of a directory delimiter ('/' or '\') in a string.
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* Return index into string if found, -1 otherwise.
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*/
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static int dirdelim (char *str)
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{
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char *start = str;
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while (*str != '\0') {
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if (ISDIRDELIM(*str))
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return str - start;
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str++;
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}
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return -1;
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}
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/*
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* Extract zero terminated short name from a directory entry.
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*/
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static void get_name (dir_entry *dirent, char *s_name)
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{
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char *ptr;
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memcpy(s_name, dirent->name, 8);
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s_name[8] = '\0';
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ptr = s_name;
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while (*ptr && *ptr != ' ')
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ptr++;
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if (dirent->ext[0] && dirent->ext[0] != ' ') {
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*ptr = '.';
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ptr++;
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memcpy(ptr, dirent->ext, 3);
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ptr[3] = '\0';
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while (*ptr && *ptr != ' ')
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ptr++;
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}
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*ptr = '\0';
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if (*s_name == DELETED_FLAG)
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*s_name = '\0';
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else if (*s_name == aRING)
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*s_name = DELETED_FLAG;
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downcase(s_name);
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}
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/*
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* Get the entry at index 'entry' in a FAT (12/16/32) table.
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* On failure 0x00 is returned.
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*/
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static __u32 get_fatent (fsdata *mydata, __u32 entry)
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{
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__u32 bufnum;
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__u32 off16, offset;
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__u32 ret = 0x00;
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__u16 val1, val2;
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switch (mydata->fatsize) {
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case 32:
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bufnum = entry / FAT32BUFSIZE;
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offset = entry - bufnum * FAT32BUFSIZE;
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break;
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case 16:
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bufnum = entry / FAT16BUFSIZE;
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offset = entry - bufnum * FAT16BUFSIZE;
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break;
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case 12:
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bufnum = entry / FAT12BUFSIZE;
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offset = entry - bufnum * FAT12BUFSIZE;
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break;
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default:
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/* Unsupported FAT size */
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return ret;
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}
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debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
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mydata->fatsize, entry, entry, offset, offset);
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/* Read a new block of FAT entries into the cache. */
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if (bufnum != mydata->fatbufnum) {
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__u32 getsize = FATBUFBLOCKS;
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__u8 *bufptr = mydata->fatbuf;
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__u32 fatlength = mydata->fatlength;
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__u32 startblock = bufnum * FATBUFBLOCKS;
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if (getsize > fatlength)
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getsize = fatlength;
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fatlength *= mydata->sect_size; /* We want it in bytes now */
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startblock += mydata->fat_sect; /* Offset from start of disk */
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if (disk_read(startblock, getsize, bufptr) < 0) {
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debug("Error reading FAT blocks\n");
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return ret;
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}
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mydata->fatbufnum = bufnum;
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}
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/* Get the actual entry from the table */
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switch (mydata->fatsize) {
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case 32:
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ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
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break;
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case 16:
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ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
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break;
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case 12:
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off16 = (offset * 3) / 4;
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switch (offset & 0x3) {
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case 0:
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ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
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ret &= 0xfff;
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break;
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case 1:
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val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
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val1 &= 0xf000;
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val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
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val2 &= 0x00ff;
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ret = (val2 << 4) | (val1 >> 12);
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break;
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case 2:
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val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
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val1 &= 0xff00;
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val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
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val2 &= 0x000f;
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ret = (val2 << 8) | (val1 >> 8);
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break;
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case 3:
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ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
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ret = (ret & 0xfff0) >> 4;
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break;
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default:
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break;
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}
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break;
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}
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debug("FAT%d: ret: %08x, offset: %04x\n",
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mydata->fatsize, ret, offset);
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return ret;
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}
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/*
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* Read at most 'size' bytes from the specified cluster into 'buffer'.
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* Return 0 on success, -1 otherwise.
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*/
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static int
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get_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
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unsigned long size)
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{
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__u32 idx = 0;
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__u32 startsect;
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if (clustnum > 0) {
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startsect = mydata->data_begin +
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clustnum * mydata->clust_size;
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} else {
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startsect = mydata->rootdir_sect;
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}
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debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
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if (disk_read(startsect, size / mydata->sect_size, buffer) < 0) {
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debug("Error reading data\n");
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return -1;
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}
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if (size % mydata->sect_size) {
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__u8 tmpbuf[mydata->sect_size];
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idx = size / mydata->sect_size;
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if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
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debug("Error reading data\n");
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return -1;
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}
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buffer += idx * mydata->sect_size;
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memcpy(buffer, tmpbuf, size % mydata->sect_size);
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return 0;
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}
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return 0;
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}
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/*
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* Read at most 'maxsize' bytes from the file associated with 'dentptr'
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* into 'buffer'.
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* Return the number of bytes read or -1 on fatal errors.
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*/
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static long
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get_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
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unsigned long maxsize)
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{
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unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
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unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
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__u32 curclust = START(dentptr);
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__u32 endclust, newclust;
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unsigned long actsize;
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debug("Filesize: %ld bytes\n", filesize);
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if (maxsize > 0 && filesize > maxsize)
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filesize = maxsize;
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debug("%ld bytes\n", filesize);
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actsize = bytesperclust;
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endclust = curclust;
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do {
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/* search for consecutive clusters */
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while (actsize < filesize) {
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newclust = get_fatent(mydata, endclust);
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if ((newclust - 1) != endclust)
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goto getit;
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if (CHECK_CLUST(newclust, mydata->fatsize)) {
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debug("curclust: 0x%x\n", newclust);
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debug("Invalid FAT entry\n");
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return gotsize;
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}
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endclust = newclust;
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actsize += bytesperclust;
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}
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/* actsize >= file size */
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actsize -= bytesperclust;
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/* get remaining clusters */
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if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
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printf("Error reading cluster\n");
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return -1;
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}
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/* get remaining bytes */
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gotsize += (int)actsize;
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filesize -= actsize;
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buffer += actsize;
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actsize = filesize;
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if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
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printf("Error reading cluster\n");
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return -1;
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}
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gotsize += actsize;
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return gotsize;
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getit:
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if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
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printf("Error reading cluster\n");
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return -1;
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}
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gotsize += (int)actsize;
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filesize -= actsize;
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buffer += actsize;
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curclust = get_fatent(mydata, endclust);
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if (CHECK_CLUST(curclust, mydata->fatsize)) {
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debug("curclust: 0x%x\n", curclust);
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printf("Invalid FAT entry\n");
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return gotsize;
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}
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actsize = bytesperclust;
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endclust = curclust;
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} while (1);
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}
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#ifdef CONFIG_SUPPORT_VFAT
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/*
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* Extract the file name information from 'slotptr' into 'l_name',
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* starting at l_name[*idx].
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* Return 1 if terminator (zero byte) is found, 0 otherwise.
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*/
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static int slot2str (dir_slot *slotptr, char *l_name, int *idx)
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{
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int j;
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for (j = 0; j <= 8; j += 2) {
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l_name[*idx] = slotptr->name0_4[j];
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if (l_name[*idx] == 0x00)
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return 1;
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(*idx)++;
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}
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for (j = 0; j <= 10; j += 2) {
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l_name[*idx] = slotptr->name5_10[j];
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if (l_name[*idx] == 0x00)
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return 1;
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(*idx)++;
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}
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for (j = 0; j <= 2; j += 2) {
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l_name[*idx] = slotptr->name11_12[j];
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if (l_name[*idx] == 0x00)
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return 1;
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(*idx)++;
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}
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return 0;
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}
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/*
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* Extract the full long filename starting at 'retdent' (which is really
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* a slot) into 'l_name'. If successful also copy the real directory entry
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* into 'retdent'
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* Return 0 on success, -1 otherwise.
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*/
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__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
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__u8 get_vfatname_block[MAX_CLUSTSIZE];
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|
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static int
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get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
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dir_entry *retdent, char *l_name)
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{
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dir_entry *realdent;
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dir_slot *slotptr = (dir_slot *)retdent;
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__u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
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PREFETCH_BLOCKS :
|
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mydata->clust_size);
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__u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
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int idx = 0;
|
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|
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if (counter > VFAT_MAXSEQ) {
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debug("Error: VFAT name is too long\n");
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return -1;
|
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}
|
|
|
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while ((__u8 *)slotptr < buflimit) {
|
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if (counter == 0)
|
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break;
|
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if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
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return -1;
|
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slotptr++;
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counter--;
|
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}
|
|
|
|
if ((__u8 *)slotptr >= buflimit) {
|
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dir_slot *slotptr2;
|
|
|
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if (curclust == 0)
|
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return -1;
|
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curclust = get_fatent(mydata, curclust);
|
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if (CHECK_CLUST(curclust, mydata->fatsize)) {
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debug("curclust: 0x%x\n", curclust);
|
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printf("Invalid FAT entry\n");
|
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return -1;
|
|
}
|
|
|
|
if (get_cluster(mydata, curclust, get_vfatname_block,
|
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mydata->clust_size * mydata->sect_size) != 0) {
|
|
debug("Error: reading directory block\n");
|
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return -1;
|
|
}
|
|
|
|
slotptr2 = (dir_slot *)get_vfatname_block;
|
|
while (counter > 0) {
|
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if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
|
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& 0xff) != counter)
|
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return -1;
|
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slotptr2++;
|
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counter--;
|
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}
|
|
|
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/* Save the real directory entry */
|
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realdent = (dir_entry *)slotptr2;
|
|
while ((__u8 *)slotptr2 > get_vfatname_block) {
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slotptr2--;
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slot2str(slotptr2, l_name, &idx);
|
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}
|
|
} else {
|
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/* Save the real directory entry */
|
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realdent = (dir_entry *)slotptr;
|
|
}
|
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|
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do {
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slotptr--;
|
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if (slot2str(slotptr, l_name, &idx))
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break;
|
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} while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
|
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|
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l_name[idx] = '\0';
|
|
if (*l_name == DELETED_FLAG)
|
|
*l_name = '\0';
|
|
else if (*l_name == aRING)
|
|
*l_name = DELETED_FLAG;
|
|
downcase(l_name);
|
|
|
|
/* Return the real directory entry */
|
|
memcpy(retdent, realdent, sizeof(dir_entry));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Calculate short name checksum */
|
|
static __u8 mkcksum (const char *str)
|
|
{
|
|
int i;
|
|
|
|
__u8 ret = 0;
|
|
|
|
for (i = 0; i < 11; i++) {
|
|
ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_SUPPORT_VFAT */
|
|
|
|
/*
|
|
* Get the directory entry associated with 'filename' from the directory
|
|
* starting at 'startsect'
|
|
*/
|
|
__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
|
|
__u8 get_dentfromdir_block[MAX_CLUSTSIZE];
|
|
|
|
static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
|
|
char *filename, dir_entry *retdent,
|
|
int dols)
|
|
{
|
|
__u16 prevcksum = 0xffff;
|
|
__u32 curclust = START(retdent);
|
|
int files = 0, dirs = 0;
|
|
|
|
debug("get_dentfromdir: %s\n", filename);
|
|
|
|
while (1) {
|
|
dir_entry *dentptr;
|
|
|
|
int i;
|
|
|
|
if (get_cluster(mydata, curclust, get_dentfromdir_block,
|
|
mydata->clust_size * mydata->sect_size) != 0) {
|
|
debug("Error: reading directory block\n");
|
|
return NULL;
|
|
}
|
|
|
|
dentptr = (dir_entry *)get_dentfromdir_block;
|
|
|
|
for (i = 0; i < DIRENTSPERCLUST; i++) {
|
|
char s_name[14], l_name[VFAT_MAXLEN_BYTES];
|
|
|
|
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 &&
|
|
(dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
|
|
prevcksum = ((dir_slot *)dentptr)->alias_checksum;
|
|
get_vfatname(mydata, curclust,
|
|
get_dentfromdir_block,
|
|
dentptr, l_name);
|
|
if (dols) {
|
|
int isdir;
|
|
char dirc;
|
|
int doit = 0;
|
|
|
|
isdir = (dentptr->attr & ATTR_DIR);
|
|
|
|
if (isdir) {
|
|
dirs++;
|
|
dirc = '/';
|
|
doit = 1;
|
|
} else {
|
|
dirc = ' ';
|
|
if (l_name[0] != 0) {
|
|
files++;
|
|
doit = 1;
|
|
}
|
|
}
|
|
if (doit) {
|
|
if (dirc == ' ') {
|
|
printf(" %8ld %s%c\n",
|
|
(long)FAT2CPU32(dentptr->size),
|
|
l_name,
|
|
dirc);
|
|
} else {
|
|
printf(" %s%c\n",
|
|
l_name,
|
|
dirc);
|
|
}
|
|
}
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
debug("vfatname: |%s|\n", l_name);
|
|
} else
|
|
#endif
|
|
{
|
|
/* Volume label or VFAT entry */
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
}
|
|
if (dentptr->name[0] == 0) {
|
|
if (dols) {
|
|
printf("\n%d file(s), %d dir(s)\n\n",
|
|
files, dirs);
|
|
}
|
|
debug("Dentname == NULL - %d\n", i);
|
|
return NULL;
|
|
}
|
|
#ifdef CONFIG_SUPPORT_VFAT
|
|
if (dols && mkcksum(dentptr->name) == prevcksum) {
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
#endif
|
|
get_name(dentptr, s_name);
|
|
if (dols) {
|
|
int isdir = (dentptr->attr & ATTR_DIR);
|
|
char dirc;
|
|
int doit = 0;
|
|
|
|
if (isdir) {
|
|
dirs++;
|
|
dirc = '/';
|
|
doit = 1;
|
|
} else {
|
|
dirc = ' ';
|
|
if (s_name[0] != 0) {
|
|
files++;
|
|
doit = 1;
|
|
}
|
|
}
|
|
|
|
if (doit) {
|
|
if (dirc == ' ') {
|
|
printf(" %8ld %s%c\n",
|
|
(long)FAT2CPU32(dentptr->size),
|
|
s_name, dirc);
|
|
} else {
|
|
printf(" %s%c\n",
|
|
s_name, dirc);
|
|
}
|
|
}
|
|
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
|
|
if (strcmp(filename, s_name)
|
|
&& strcmp(filename, l_name)) {
|
|
debug("Mismatch: |%s|%s|\n", s_name, l_name);
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
|
|
memcpy(retdent, dentptr, sizeof(dir_entry));
|
|
|
|
debug("DentName: %s", s_name);
|
|
debug(", start: 0x%x", START(dentptr));
|
|
debug(", size: 0x%x %s\n",
|
|
FAT2CPU32(dentptr->size),
|
|
(dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
|
|
|
|
return retdent;
|
|
}
|
|
|
|
curclust = get_fatent(mydata, curclust);
|
|
if (CHECK_CLUST(curclust, mydata->fatsize)) {
|
|
debug("curclust: 0x%x\n", curclust);
|
|
printf("Invalid FAT entry\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Read boot sector and volume info from a FAT filesystem
|
|
*/
|
|
static int
|
|
read_bootsectandvi (boot_sector *bs, volume_info *volinfo, int *fatsize)
|
|
{
|
|
__u8 *block;
|
|
volume_info *vistart;
|
|
int ret = 0;
|
|
|
|
if (cur_dev == NULL) {
|
|
debug("Error: no device selected\n");
|
|
return -1;
|
|
}
|
|
|
|
block = malloc(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);
|
|
bs->secs_track = FAT2CPU16(bs->secs_track);
|
|
bs->heads = FAT2CPU16(bs->heads);
|
|
bs->total_sect = FAT2CPU32(bs->total_sect);
|
|
|
|
/* FAT32 entries */
|
|
if (bs->fat_length == 0) {
|
|
/* Assume FAT32 */
|
|
bs->fat32_length = FAT2CPU32(bs->fat32_length);
|
|
bs->flags = FAT2CPU16(bs->flags);
|
|
bs->root_cluster = FAT2CPU32(bs->root_cluster);
|
|
bs->info_sector = FAT2CPU16(bs->info_sector);
|
|
bs->backup_boot = FAT2CPU16(bs->backup_boot);
|
|
vistart = (volume_info *)(block + sizeof(boot_sector));
|
|
*fatsize = 32;
|
|
} else {
|
|
vistart = (volume_info *)&(bs->fat32_length);
|
|
*fatsize = 0;
|
|
}
|
|
memcpy(volinfo, vistart, sizeof(volume_info));
|
|
|
|
if (*fatsize == 32) {
|
|
if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
|
|
goto exit;
|
|
} else {
|
|
if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
|
|
*fatsize = 12;
|
|
goto exit;
|
|
}
|
|
if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
|
|
*fatsize = 16;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
debug("Error: broken fs_type sign\n");
|
|
fail:
|
|
ret = -1;
|
|
exit:
|
|
free(block);
|
|
return ret;
|
|
}
|
|
|
|
__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
|
|
__u8 do_fat_read_block[MAX_CLUSTSIZE];
|
|
|
|
long
|
|
do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
|
|
int dols)
|
|
{
|
|
char fnamecopy[2048];
|
|
boot_sector bs;
|
|
volume_info volinfo;
|
|
fsdata datablock;
|
|
fsdata *mydata = &datablock;
|
|
dir_entry *dentptr;
|
|
__u16 prevcksum = 0xffff;
|
|
char *subname = "";
|
|
__u32 cursect;
|
|
int idx, isdir = 0;
|
|
int files = 0, dirs = 0;
|
|
long ret = -1;
|
|
int firsttime;
|
|
__u32 root_cluster = 0;
|
|
int rootdir_size = 0;
|
|
int j;
|
|
|
|
if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
|
|
debug("Error: reading boot sector\n");
|
|
return -1;
|
|
}
|
|
|
|
if (mydata->fatsize == 32) {
|
|
root_cluster = bs.root_cluster;
|
|
mydata->fatlength = bs.fat32_length;
|
|
} 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->fatsize == 32) {
|
|
mydata->data_begin = mydata->rootdir_sect -
|
|
(mydata->clust_size * 2);
|
|
} else {
|
|
rootdir_size = ((bs.dir_entries[1] * (int)256 +
|
|
bs.dir_entries[0]) *
|
|
sizeof(dir_entry)) /
|
|
mydata->sect_size;
|
|
mydata->data_begin = mydata->rootdir_sect +
|
|
rootdir_size -
|
|
(mydata->clust_size * 2);
|
|
}
|
|
|
|
mydata->fatbufnum = -1;
|
|
mydata->fatbuf = malloc(FATBUFSIZE);
|
|
if (mydata->fatbuf == NULL) {
|
|
debug("Error: allocating memory\n");
|
|
return -1;
|
|
}
|
|
|
|
#ifdef CONFIG_SUPPORT_VFAT
|
|
debug("VFAT Support enabled\n");
|
|
#endif
|
|
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"
|
|
"Data begins at: %d\n",
|
|
root_cluster,
|
|
mydata->rootdir_sect,
|
|
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))
|
|
filename++;
|
|
|
|
/* Make a copy of the filename and convert it to lowercase */
|
|
strcpy(fnamecopy, filename);
|
|
downcase(fnamecopy);
|
|
|
|
if (*fnamecopy == '\0') {
|
|
if (!dols)
|
|
goto exit;
|
|
|
|
dols = LS_ROOT;
|
|
} else if ((idx = dirdelim(fnamecopy)) >= 0) {
|
|
isdir = 1;
|
|
fnamecopy[idx] = '\0';
|
|
subname = fnamecopy + idx + 1;
|
|
|
|
/* Handle multiple delimiters */
|
|
while (ISDIRDELIM(*subname))
|
|
subname++;
|
|
} else if (dols) {
|
|
isdir = 1;
|
|
}
|
|
|
|
j = 0;
|
|
while (1) {
|
|
int i;
|
|
|
|
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_block) < 0) {
|
|
debug("Error: reading rootdir block\n");
|
|
goto exit;
|
|
}
|
|
|
|
dentptr = (dir_entry *) do_fat_read_block;
|
|
|
|
for (i = 0; i < DIRENTSPERBLOCK; i++) {
|
|
char s_name[14], l_name[VFAT_MAXLEN_BYTES];
|
|
|
|
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 &&
|
|
(dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
|
|
prevcksum =
|
|
((dir_slot *)dentptr)->alias_checksum;
|
|
|
|
get_vfatname(mydata,
|
|
root_cluster,
|
|
do_fat_read_block,
|
|
dentptr, l_name);
|
|
|
|
if (dols == LS_ROOT) {
|
|
char dirc;
|
|
int doit = 0;
|
|
int isdir =
|
|
(dentptr->attr & ATTR_DIR);
|
|
|
|
if (isdir) {
|
|
dirs++;
|
|
dirc = '/';
|
|
doit = 1;
|
|
} else {
|
|
dirc = ' ';
|
|
if (l_name[0] != 0) {
|
|
files++;
|
|
doit = 1;
|
|
}
|
|
}
|
|
if (doit) {
|
|
if (dirc == ' ') {
|
|
printf(" %8ld %s%c\n",
|
|
(long)FAT2CPU32(dentptr->size),
|
|
l_name,
|
|
dirc);
|
|
} else {
|
|
printf(" %s%c\n",
|
|
l_name,
|
|
dirc);
|
|
}
|
|
}
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
debug("Rootvfatname: |%s|\n",
|
|
l_name);
|
|
} else
|
|
#endif
|
|
{
|
|
/* Volume label or VFAT entry */
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
} else if (dentptr->name[0] == 0) {
|
|
debug("RootDentname == NULL - %d\n", i);
|
|
if (dols == LS_ROOT) {
|
|
printf("\n%d file(s), %d dir(s)\n\n",
|
|
files, dirs);
|
|
ret = 0;
|
|
}
|
|
goto exit;
|
|
}
|
|
#ifdef CONFIG_SUPPORT_VFAT
|
|
else if (dols == LS_ROOT &&
|
|
mkcksum(dentptr->name) == prevcksum) {
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
#endif
|
|
get_name(dentptr, s_name);
|
|
|
|
if (dols == LS_ROOT) {
|
|
int isdir = (dentptr->attr & ATTR_DIR);
|
|
char dirc;
|
|
int doit = 0;
|
|
|
|
if (isdir) {
|
|
dirc = '/';
|
|
if (s_name[0] != 0) {
|
|
dirs++;
|
|
doit = 1;
|
|
}
|
|
} else {
|
|
dirc = ' ';
|
|
if (s_name[0] != 0) {
|
|
files++;
|
|
doit = 1;
|
|
}
|
|
}
|
|
if (doit) {
|
|
if (dirc == ' ') {
|
|
printf(" %8ld %s%c\n",
|
|
(long)FAT2CPU32(dentptr->size),
|
|
s_name, dirc);
|
|
} else {
|
|
printf(" %s%c\n",
|
|
s_name, dirc);
|
|
}
|
|
}
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
|
|
if (strcmp(fnamecopy, s_name)
|
|
&& strcmp(fnamecopy, l_name)) {
|
|
debug("RootMismatch: |%s|%s|\n", s_name,
|
|
l_name);
|
|
dentptr++;
|
|
continue;
|
|
}
|
|
|
|
if (isdir && !(dentptr->attr & ATTR_DIR))
|
|
goto exit;
|
|
|
|
debug("RootName: %s", s_name);
|
|
debug(", start: 0x%x", START(dentptr));
|
|
debug(", size: 0x%x %s\n",
|
|
FAT2CPU32(dentptr->size),
|
|
isdir ? "(DIR)" : "");
|
|
|
|
goto rootdir_done; /* We got a match */
|
|
}
|
|
debug("END LOOP: j=%d clust_size=%d\n", j,
|
|
mydata->clust_size);
|
|
|
|
/*
|
|
* On FAT32 we must fetch the FAT entries for the next
|
|
* root directory clusters when a cluster has been
|
|
* completely processed.
|
|
*/
|
|
++j;
|
|
int fat32_end = 0;
|
|
if ((mydata->fatsize == 32) && (j == mydata->clust_size)) {
|
|
int nxtsect = 0;
|
|
int nxt_clust = 0;
|
|
|
|
nxt_clust = get_fatent(mydata, root_cluster);
|
|
fat32_end = CHECK_CLUST(nxt_clust, 32);
|
|
|
|
nxtsect = mydata->data_begin +
|
|
(nxt_clust * mydata->clust_size);
|
|
|
|
root_cluster = nxt_clust;
|
|
|
|
cursect = nxtsect;
|
|
j = 0;
|
|
} else {
|
|
cursect++;
|
|
}
|
|
|
|
/* If end of rootdir reached */
|
|
if ((mydata->fatsize == 32 && fat32_end) ||
|
|
(mydata->fatsize != 32 && j == rootdir_size)) {
|
|
if (dols == LS_ROOT) {
|
|
printf("\n%d file(s), %d dir(s)\n\n",
|
|
files, dirs);
|
|
ret = 0;
|
|
}
|
|
goto exit;
|
|
}
|
|
}
|
|
rootdir_done:
|
|
|
|
firsttime = 1;
|
|
|
|
while (isdir) {
|
|
int startsect = mydata->data_begin
|
|
+ START(dentptr) * mydata->clust_size;
|
|
dir_entry dent;
|
|
char *nextname = NULL;
|
|
|
|
dent = *dentptr;
|
|
dentptr = &dent;
|
|
|
|
idx = dirdelim(subname);
|
|
|
|
if (idx >= 0) {
|
|
subname[idx] = '\0';
|
|
nextname = subname + idx + 1;
|
|
/* Handle multiple delimiters */
|
|
while (ISDIRDELIM(*nextname))
|
|
nextname++;
|
|
if (dols && *nextname == '\0')
|
|
firsttime = 0;
|
|
} else {
|
|
if (dols && firsttime) {
|
|
firsttime = 0;
|
|
} else {
|
|
isdir = 0;
|
|
}
|
|
}
|
|
|
|
if (get_dentfromdir(mydata, startsect, subname, dentptr,
|
|
isdir ? 0 : dols) == NULL) {
|
|
if (dols && !isdir)
|
|
ret = 0;
|
|
goto exit;
|
|
}
|
|
|
|
if (idx >= 0) {
|
|
if (!(dentptr->attr & ATTR_DIR))
|
|
goto exit;
|
|
subname = nextname;
|
|
}
|
|
}
|
|
|
|
ret = get_contents(mydata, dentptr, buffer, maxsize);
|
|
debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
|
|
|
|
exit:
|
|
free(mydata->fatbuf);
|
|
return ret;
|
|
}
|
|
|
|
int file_fat_detectfs (void)
|
|
{
|
|
boot_sector bs;
|
|
volume_info volinfo;
|
|
int fatsize;
|
|
char vol_label[12];
|
|
|
|
if (cur_dev == NULL) {
|
|
printf("No current device\n");
|
|
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)
|
|
printf("Interface: ");
|
|
switch (cur_dev->if_type) {
|
|
case IF_TYPE_IDE:
|
|
printf("IDE");
|
|
break;
|
|
case IF_TYPE_SATA:
|
|
printf("SATA");
|
|
break;
|
|
case IF_TYPE_SCSI:
|
|
printf("SCSI");
|
|
break;
|
|
case IF_TYPE_ATAPI:
|
|
printf("ATAPI");
|
|
break;
|
|
case IF_TYPE_USB:
|
|
printf("USB");
|
|
break;
|
|
case IF_TYPE_DOC:
|
|
printf("DOC");
|
|
break;
|
|
case IF_TYPE_MMC:
|
|
printf("MMC");
|
|
break;
|
|
default:
|
|
printf("Unknown");
|
|
}
|
|
|
|
printf("\n Device %d: ", cur_dev->dev);
|
|
dev_print(cur_dev);
|
|
#endif
|
|
|
|
if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
|
|
printf("\nNo valid FAT fs found\n");
|
|
return 1;
|
|
}
|
|
|
|
memcpy(vol_label, volinfo.volume_label, 11);
|
|
vol_label[11] = '\0';
|
|
volinfo.fs_type[5] = '\0';
|
|
|
|
printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part,
|
|
volinfo.fs_type, vol_label);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
printf("reading %s\n", filename);
|
|
return do_fat_read(filename, buffer, maxsize, LS_NO);
|
|
}
|