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b86a651b64
Add U-Boot adjustments to the libexfat code and integrate
the result into U-Boot filesystem layer. This provides full
read-write exfat support for U-Boot available via generic
filesystem interface.
FS_DIRENT_NAME_LEN is increased to 1024 in case exfat is
enabled, because EXFAT can use UTF16 names, which do not
fit into current FS_DIRENT_NAME_LEN. To avoid affecting
every configuration, increase FS_DIRENT_NAME_LEN only in
case EXFAT is enabled.
Example usage via sandbox, assuming disk.img with one exfat partition:
Drive info:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; host info 0'
dev blocks blksz label path
0 262144 512 0 ../disk.img
List files:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; ls host 0:1 /api'
475 Kconfig
230 Makefile
1873 README
...
10 file(s), 0 dir(s)
Load and checksum a file:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; load host 0:1 $loadaddr .config ; \
crc32 $loadaddr $filesize'
56724 bytes read in 1 ms (54.1 MiB/s)
crc32 for 00000000 ... 0000dd93 ==> b2e847c9
$ crc32 .config
b2e847c9
Load .config file to RAM, store the file into FS as /newconfig,
load the /newconfig into RAM and checksum the file:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; load host 0:1 $loadaddr .config ; \
save host 0:1 $loadaddr /newconfig $filesize ; \
load host 0:1 0x10000 /newconfig ; \
crc32 0x10000 $filesize'
56724 bytes read in 1 ms (54.1 MiB/s)
56724 bytes written in 0 ms
56724 bytes read in 0 ms
crc32 for 00010000 ... 0001dd93 ==> b2e847c9
Remove file 3.txt and create new directory /newdir:
$ ./u-boot -Tc 'host bind 0 ../disk.img ; ls host 0:1 / ; \
rm host 0:1 3.txt ; mkdir host 0:1 /newdir ; \
ls host 0:1 /'
...
0 1.txt
0 2.txt
0 3.txt
0 4.txt
0 5.txt
7 file(s), 4 dir(s)
...
0 1.txt
0 2.txt
newdir/
0 4.txt
0 5.txt
6 file(s), 5 dir(s)
Acked-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Marek Vasut <marex@denx.de>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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repair.c (09.03.17)
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exFAT file system implementation library.
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Free exFAT implementation.
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Copyright (C) 2010-2023 Andrew Nayenko
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "exfat.h"
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#ifndef __UBOOT__
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#include <strings.h>
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#endif
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int exfat_errors_fixed;
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bool exfat_ask_to_fix(const struct exfat* ef)
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{
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const char* question = "Fix (Y/N)?";
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#ifndef __UBOOT__
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char answer[8];
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bool yeah, nope;
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#endif
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switch (ef->repair)
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{
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case EXFAT_REPAIR_NO:
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return false;
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case EXFAT_REPAIR_YES:
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printf("%s %s", question, "Y\n");
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return true;
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case EXFAT_REPAIR_ASK:
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#ifndef __UBOOT__
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do
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{
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printf("%s ", question);
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fflush(stdout);
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if (fgets(answer, sizeof(answer), stdin))
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{
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yeah = strcasecmp(answer, "Y\n") == 0;
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nope = strcasecmp(answer, "N\n") == 0;
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}
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else
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{
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yeah = false;
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nope = true;
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}
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}
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while (!yeah && !nope);
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return yeah;
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#else
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default:
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/* Do not attempt to repair FS in U-Boot. */
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return false;
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#endif
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}
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exfat_bug("invalid repair option value: %d", ef->repair);
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#ifdef __UBOOT__
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return false;
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#endif
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}
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bool exfat_fix_invalid_vbr_checksum(const struct exfat* ef, void* sector,
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uint32_t vbr_checksum)
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{
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size_t i;
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off_t sector_size = SECTOR_SIZE(*ef->sb);
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for (i = 0; i < sector_size / sizeof(vbr_checksum); i++)
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((le32_t*) sector)[i] = cpu_to_le32(vbr_checksum);
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if (exfat_pwrite(ef->dev, sector, sector_size, 11 * sector_size) < 0)
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{
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exfat_error("failed to write correct VBR checksum");
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return false;
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}
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exfat_errors_fixed++;
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return true;
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}
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bool exfat_fix_invalid_node_checksum(UNUSED const struct exfat* ef,
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struct exfat_node* node)
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{
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/* checksum will be rewritten by exfat_flush_node() */
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node->is_dirty = true;
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exfat_errors_fixed++;
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return true;
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}
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bool exfat_fix_unknown_entry(struct exfat* ef, struct exfat_node* dir,
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const struct exfat_entry* entry, off_t offset)
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{
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struct exfat_entry deleted = *entry;
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deleted.type &= ~EXFAT_ENTRY_VALID;
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if (exfat_generic_pwrite(ef, dir, &deleted, sizeof(struct exfat_entry),
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offset) != sizeof(struct exfat_entry))
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return false;
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exfat_errors_fixed++;
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return true;
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}
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