u-boot.git/include/fat.h, branch master

fs: fat: Refactor dirty flag handling

2026-03-27T19:14:18+00:00

Refactor the dirty flag handling a little bit so an inline
function is called instead of directly stuffing a value into
the variable.

This allows variable that holds the flag to be completely removed
if its not used i.e. CONFIG_FAT_WIRTE=n

Signed-off-by: Daniel Palmer

include/fat.h: Audit include list

2025-06-02T23:26:15+00:00

This file does not need  so remove it. However the file
common/spl/spl_fat.c does need it, so add it there.

Signed-off-by: Tom Rini

fs: fat: add rename

2025-03-07T17:50:22+00:00

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

fs: fat: calculate FAT type based on cluster count

2023-11-29T01:10:24+00:00

This fixes an issue where the FAT type (FAT12, FAT16) is not
correctly detected, e.g. when the BPB field BS_FilSysType contains the
valid value "FAT     ".

According to the FAT spec the field BS_FilSysType has only
informational character and does not determine the FAT type.

The logic of this code is based on the linux kernel implementation
from the file fs/fat/inode.c function fat_fill_super().

For details about FAT see http://elm-chan.org/docs/fat_e.html

Signed-off-by: Christian Taedcke

fs/fat: avoid noisy message fat_read_file()

2023-01-20T15:38:52+00:00

UEFI applications call file system functions to determine if a file exists.
The return codes are evaluated to show appropriate messages.
U-Boot's file system layer should not interfere with the output.

Rename file_fat_read_at() to fat_read_file() adjusting the parameter
sequence and names and eliminate the old wrapper function.

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Tom Rini 
Reviewed-by: Ilias Apalodimas

fs: fat: structure for name and extension

2021-01-23T06:56:53+00:00

The short name and extension of FAT files are stored in adjacent fields of
the directory entry. For some operations like calculating a checksum or
copying both fields it is preferable to treat both as one structure.

Change the definition of the directory entry structure to include a
structure comprising the name and the extension field.

This resolves Coverity CID 316357, CID 316350, CID 316348.

Signed-off-by: Heinrich Schuchardt

fs/fat: implement fsuuid command

2020-12-31T13:32:27+00:00

The FAT file system does not have a UUID but a 4 byte volume ID.
Let the fsuuid command show it in XXXX-XXXX format.

Signed-off-by: Heinrich Schuchardt

fs: fat: eliminate DIRENTSPERBLOCK() macro

2020-12-31T13:32:02+00:00

The FAT filesystem implementation uses several marcros referring to a magic
variable name mydata which renders the code less readable. Eliminate one of
them which is only used for a debug() statement.

Use log_debug() instead of debug().

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Simon Glass

fs: fat: export fat_next_cluster()

2020-12-10T08:14:58+00:00

Rename function next_cluster() to fat_next_cluster() and export it.

When creating a new directory entries we should reuse deleted entries.
This requires re-scanning the directory.

Signed-off-by: Heinrich Schuchardt

common: Drop part.h from common header

2020-05-18T21:33:33+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass