Re: [edk2-devel] Is there a way to create filesystem in UEFI Shell ?

["Andrew Fish via groups.io" <afish=apple.com@groups.io>]

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FYI you can have much larger files in the newer version of the filesystem. See EFI_COMMON_SECTION_HEADER2

https://uefi.org/specs/PI/1.8A/V3_Code_Definitions.html#firmware-file-system
https://uefi.org/specs/PI/1.8A/V3_Code_Definitions.html#firmware-file-section

Thanks,

Andrew Fish

> On Apr 3, 2024, at 8:11 PM, John Chew <yuinyee.chew@starfivetech.com> wrote:
> 
> On Wed, Apr 3, 2024 at 03:48 PM, Yoshinoya wrote:
> Maybe ref to ramdisk sample, create a memory type block io device, then mount file system on it.
> UEFI supports fat file system, some 3rd drivers could be added to support ext4 filesystem.
> Search them on github website
> Thanks Yoshinoya for your input. =)
> 
>  
> I have tried to compile the filesystem into my FD image as a separate FV. Then building FV HOB with it using "BuildFvHob".
> 
> Next, using the "GetSectionFromAnyFv" to load the filesystem into buffer as follow:
> 
> <dummyfile.0.part>
> 
> Finally, create a disk with the filesystem buffer created earlier. 
> 
> <dummyfile.1.part>
> 
> This works without having to create filesystem in EDK2. Instead loading it from somewhere else.
> 
> However, this method has some limitations because the maximum size of each SECTION in FFS is only 16MB.
> 
> <dummyfile.2.part>
> 
> Thus, I still couldn't TFTP Linux (~25MB) into my filesystem "FS0:"
> 
>  
> My solution:
> 
> <dummyfile.3.part> <dummyfile.4.part>
> 
> 1. Allocate buffer
> 
> 2. Populate the buffer by with100MB FAT16 header
> 
> 3. Register virtual disk with the buffer
> 
>  
> I'm able to allocate 100MB of FAT16 filesystem and TFTP Linux successfully:
> <dummyfile.5.part>
> 
> <dummyfile.6.part>
> 
>  
> Thanks everyone!!
> 
> John
> 
>  
> 



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