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

["John Chew" <yuinyee.chew@starfivetech.com>]

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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:

Finally, create a disk with the filesystem buffer created earlier.

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.

Thus, I still couldn't TFTP Linux (~25MB) into my filesystem "FS0:"

My solution:

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:

Thanks everyone!!

John


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