[OE-core] [oe-core][PATCHv4] image_types.bbclass: add optional size to ubi vols

[Andre McCurdy]

On Tue, Jun 19, 2018 at 8:09 AM, Tobias Olausson <TOl at hms.se> wrote:
> From 1d15f0d3c516351e6540a912367bcb22f9c25bbf Mon Sep 17 00:00:00 2001
> From: Tobias Olausson <tol at hms.se>
> Date: Mon, 18 Jun 2018 15:01:53 +0200
> Subject: [oe-core][PATCHv4] image_types.bbclass: add optional size to ubi vols
>
> Instead of hard coding the ubi volume to be just large enough to fit the
> root file system, one can use a variable to set a preferred size.
>
> Signed-off-by: Tobias Olausson <tol at hms.se>
> ---
>  meta/classes/image_types.bbclass | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
> index 00a00d318f..2a0a7994c9 100644
> --- a/meta/classes/image_types.bbclass
> +++ b/meta/classes/image_types.bbclass
> @@ -164,10 +164,22 @@ multiubi_mkfs() {
>                 local vname="_$3"
>         fi
>
> +       # Set UBI_VOL_SIZE (for regular ubi) or UBI_VOL_SIZE_vname for multiubi
> +       if [ -z "${vname}" ]; then
> +               local ubi_vol_size=${UBI_VOL_SIZE}
> +       else
> +               eval local ubi_vol_size=\"\$UBI_VOL_SIZE${vname}\"

This looks odd. Presumably it (and the multiubi code from which it's
derived) relies on the _<VOLUMENAME> suffix variables
(MKUBIFS_ARGS_foo, UBI_VOL_SIZE_foo, etc) being exported from bitbake
to the shell?

I didn't find any discussion about that from when the original
multiubi code was merged though. Are there any multiubi users who can
clarify?

> +       fi
> +
>         echo \[ubifs\] > ubinize${vname}-${IMAGE_NAME}.cfg
>         echo mode=ubi >> ubinize${vname}-${IMAGE_NAME}.cfg
>         echo image=${IMGDEPLOYDIR}/${IMAGE_NAME}${vname}${IMAGE_NAME_SUFFIX}.ubifs >> ubinize${vname}-${IMAGE_NAME}.cfg
>         echo vol_id=0 >> ubinize${vname}-${IMAGE_NAME}.cfg
> +
> +       if [ -n "${ubi_vol_size}" ]; then
> +               echo "vol_size=${ubi_vol_size}" >> ubinize${vname}-${IMAGE_NAME}.cfg
> +       fi
> +
>         echo vol_type=dynamic >> ubinize${vname}-${IMAGE_NAME}.cfg
>         echo vol_name=${UBI_VOLNAME} >> ubinize${vname}-${IMAGE_NAME}.cfg
>         echo vol_flags=autoresize >> ubinize${vname}-${IMAGE_NAME}.cfg
> --
> 2.17.1
>
> --
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