[Buildroot] [PATCH 1/1] package/mke2img: use mkfs to generate rootfs image

[Arnout Vandecappelle]

On 18-03-17 15:30, Yann E. MORIN wrote:
> Sébastien, All,
> 
> On 2017-03-02 10:06 +0100, Sébastien Szymanski spake thusly:
>> mkfs is now capable of generating rootfs images. Use mkfs intead of
>> genext2fs.
>>
>> Signed-off-by: Sébastien Szymanski <sebastien.szymanski at armadeus.com>
> 
> So, to sumarize the discussion in this thread, and a discussion Thomas,
> Arnout and I just had on IRC:
> 
>  1. mke2fs can't auto-calculate the size;
> 
>  2. auto-calculation is inherently flawed, because it relies on the host
>     filesystem specifics;
> 
>  3. so we want the user to be responsible for specifying the exact size
>     he wants for his extfs;
> 
>  4. we don't care much about generating filesystems that are bckward
>     identical (i.e. we don;t care if the enerated filesystem does not
>     have the same feature set as was previously done);
> 
>  5. except we want to drop features that make it incompatible with older
>     U-Boot or other bootlaoders, or older kernels, but that should be
>     optional.
> 
>  6. can we kill most of mke2img, or can we even kill it altogether? ;-)

 So what we would like to see is something like the following patches:

1. Remove support for auto-calculation of BR2_TARGET_ROOTFS_EXT2_BLOCKS
   (move BR2_TARGET_ROOTFS_EXT2_EXTRA_BLOCKS to Config.in.legacy).
2. Switch to mkfs to generate the rootfs image (i.e. this patch).
3. Remove the mke2img package altogether, instead call mke2fs directly from
fs/ext2/ext2.mk
4. Switch BR2_TARGET_ROOTFS_EXT2_BLOCKS to a string so that you can specify
   120M instead of 120000000 - and also give it a reasonable default value.

 Do you feel up to it?

 Regards,
 Arnout

[snip]

-- 
Arnout Vandecappelle                          arnout at mind be
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