[PATCH] fs: fat: do not mangle short filenames

Stefan Herbrechtsmeier stefan.herbrechtsmeier-oss at weidmueller.com
Wed Mar 22 09:51:32 CET 2023

Am 21.03.2023 um 16:54 schrieb Tom Rini:
> On Tue, Mar 21, 2023 at 04:53:22PM +0100, Stefan Herbrechtsmeier wrote:
>> Am 21.03.2023 um 16:35 schrieb Tom Rini:
>>> On Tue, Mar 21, 2023 at 08:43:07AM +0100, Stefan Herbrechtsmeier wrote:
>>>> Am 20.03.2023 um 18:01 schrieb Tom Rini:
>>>>> On Fri, Mar 17, 2023 at 01:04:13PM +0100, Stefan Herbrechtsmeier wrote:
>>>>>> From: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
>>>>>> Do not mangle lower or mixed case filenames which fit into the upper
>>>>>> case 8.3 short filename. This ensures FAT standard compatible short
>>>>>> filenames (SFN) to support systems without long filename (LFN) support
>>>>>> like boot roms (ex. SFN BOOT.BIN instead of BOOT~1.BIN for LFN
>>>>>> boot.bin).
>>>>>> Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
>>>>>> ---
>>>>>>     fs/fat/fat_write.c | 11 +++++++----
>>>>>>     1 file changed, 7 insertions(+), 4 deletions(-)
>>>>> Can we update test/py/tests/test_fs/ somewhere to have a test for this
>>>>> case? Thanks.
>>>> What is the recommended approach to test internal behavior? The short name
>>>> isn't avialable at the terminal because u-boot support VFAT.
>>> Well, you triggered this problem with a filesystem that had contents
>>> that were "just so" and then didn't work as expected, yes?
>> No, I write a file to a file system and the boot rom do not find the file
>> because the name was wrong (BOOT~1.BIN instead of BOOT.BIN).
>> The mdir command shows the short and long file name. I will add a
>> test_fat.py with a test.
> Ah, ok, and great, thanks!

I have send a separate patch `test: fs: Check fat short file name` or 
should I send a new series with both patches?


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