u-boot.git/fs/fat/Kconfig, branch master Unnamed repository; edit this file 'description' to name the repository. fs: fat: Handle 'FAT sector size mismatch' 2026-03-10T17:52:14+00:00 Varadarajan Narayanan varadarajan.narayanan@oss.qualcomm.com 2026-02-24T03:49:59+00:00 5e7b1384902d67f4c9c405e72ae92b172e9f1974 The disk_read() and disk_write() functions of the FAT driver use the blk_dread() and blk_dwrite() respectively. The blk_* APIs read and write to the devices in terms of the device block size. However, the FAT driver reads in terms of the device block size (from fat_set_blk_dev and read_bootsectandvi) and sector size in the rest of the places. This causes buffer overflows or partial reads when the FAT sector size is not equal to device block size. Fix this by using blk_dread in fat_set_blk_dev and read_bootsectandvi instead of disk_read. And update disk_read/disk_write to handle FAT sector size and block size mismatch. Tested on blksz | FAT sector size ------+---------------- 4096 | 4096 512 | 512 4096 | 512 512 | 4096 Signed-off-by: Varadarajan Narayanan <varadarajan.narayanan@oss.qualcomm.com> 
The disk_read() and disk_write() functions of the FAT driver use the
blk_dread() and blk_dwrite() respectively. The blk_* APIs read and write
to the devices in terms of the device block size. However, the FAT
driver reads in terms of the device block size (from fat_set_blk_dev and
read_bootsectandvi) and sector size in the rest of the places.

This causes buffer overflows or partial reads when the FAT sector size
is not equal to device block size. Fix this by using blk_dread in
fat_set_blk_dev and read_bootsectandvi instead of disk_read. And update
disk_read/disk_write to handle FAT sector size and block size mismatch.

Tested on
	blksz | FAT sector size
	------+----------------
	4096  | 4096
	512   | 512
	4096  | 512
	512   | 4096

Signed-off-by: Varadarajan Narayanan <varadarajan.narayanan@oss.qualcomm.com>
fs: fat: add rename 2025-03-07T17:50:22+00:00 Gabriel Dalimonte gabriel.dalimonte@gmail.com 2025-02-17T18:26:44+00:00 06159a1465fc97d8d7b72b9bea39a396f6e7057c The implementation roughly follows the POSIX specification for rename() [1]. The ordering of operations attempting to minimize the chance for data loss in unexpected circumstances. The 'mv' command was implemented as a front end for the rename operation as that is what most users are likely familiar with in terms of behavior. The 'FAT_RENAME' Kconfig option was added to prevent code size increase on size-oriented builds like SPL. [1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html Signed-off-by: Gabriel Dalimonte <gabriel.dalimonte@gmail.com> 
The implementation roughly follows the POSIX specification for
rename() [1]. The ordering of operations attempting to minimize the chance
for data loss in unexpected circumstances.

The 'mv' command was implemented as a front end for the rename operation
as that is what most users are likely familiar with in terms of behavior.

The 'FAT_RENAME' Kconfig option was added to prevent code size increase on
size-oriented builds like SPL.

[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html

Signed-off-by: Gabriel Dalimonte <gabriel.dalimonte@gmail.com>
fs: FAT: Fix typo in FS_FAT_MAX_CLUSTSIZE description 2018-01-22T21:43:31+00:00 Tuomas Tynkkynen tuomas@tuxera.com 2018-01-05T00:45:20+00:00 e8df14d216f483d32f9daaf236686d1613b3f871 Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com> 
Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
fs: fat: add kbuild configuration support 2017-06-03T21:55:16+00:00 Sekhar Nori nsekhar@ti.com 2017-06-02T12:23:59+00:00 eedfb89e61ec823bbfc56cca62ea96fa045c4206 Add Kconfig symbols for various configurations supported by FAT filesystem support code. CONFIG_SUPPORT_VFAT has been left out since its force enabled in include/fat.h and probably should get removed at some point. Signed-off-by: Sekhar Nori <nsekhar@ti.com> [trini: add select FS_FAT for CMD_FAT and SPL_FAT_SUPPORT] Signed-off-by: Tom Rini <trini@konsulko.com> 
Add Kconfig symbols for various configurations
supported by FAT filesystem support code.

CONFIG_SUPPORT_VFAT has been left out since its
force enabled in include/fat.h and probably
should get removed at some point.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
[trini: add select FS_FAT for CMD_FAT and SPL_FAT_SUPPORT]
Signed-off-by: Tom Rini <trini@konsulko.com>
kconfig: add blank Kconfig files 2014-09-24T22:30:28+00:00 Masahiro Yamada yamada.m@jp.panasonic.com 2014-09-16T07:32:58+00:00 ed36323f6d217050f82a2200475959b8557a47e4 This would be useful to start moving various config options. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> 
This would be useful to start moving various config options.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>