Re: [isar-cip-core][RFC v1 0/6] Integrate Delta Update with rdiff_image and delta handler

From: Jan Kiszka <jan.kiszka@siemens.com>
To: Adithya Balakumar <Adithya.Balakumar@toshiba-tsip.com>,
	cip-dev@lists.cip-project.org
Cc: shivanand.kunijadar@toshiba-tsip.com,
	sai.sathujoda@toshiba-tsip.com, dinesh.kumar@toshiba-tsip.com,
	kazuhiro3.hayashi@toshiba.co.jp
Subject: Re: [isar-cip-core][RFC v1 0/6] Integrate Delta Update with rdiff_image and delta handler
Date: Fri, 8 Mar 2024 12:48:42 +0100	[thread overview]
Message-ID: <797e8a35-97d3-4579-8f0d-b56a1ba09b50@siemens.com> (raw)
In-Reply-To: <20240307074612.1996609-1-Adithya.Balakumar@toshiba-tsip.com>

On 07.03.24 08:46, Adithya Balakumar wrote:
> These series of patches enable the support for delta update for the root file system 
> with swupdate's rdiff_image and delta handler(zchunk). For now, I send this as an RFC, 
> as this needs to be reviewed by a broader audience.
>  
> A couple notes about the implementation:
> - In this patchset, Delta update is only supported for the root file system.
> - The newly added delta-update.bbclass handles the creation of the delta update artifacts.
> - The update handler type i.e rdiff_image or delta handler is set in the variable "DELTA_UPDATE_TYPE" 
> in the newly added delta-udpate.yml file along some variables required for each handler.
> - The creation of delta artifact for the rdiff_image handler requires a reference image 
> (against which the delta is computed). Currently the reference image (.wic) file is passed to the 
> build system by path to the file from the project's root directory in the variable DELTA_RDIFF_REF_IMAGE 
> in the delta-udpate.yml file.
> 
> Adithya Balakumar (6):
>   conf: Use bookworm backports for enabling delta handler in swupdate
>   swupdate-handler-roundrobin: Increase revision for Delta Handler
>     support
>   swupdate: Enable Delta handler in swupdate
>   Add Delta update support with rdiff_image and delta handler
>   swupdate.bbclass: Generate swu for delta updates
>   doc/README.swupdate.md: Update steps to test Delta software Update
> 
>  classes/delta_update.bbclass                  | 90 ++++++++++++++++++
>  classes/swupdate.bbclass                      | 35 ++++++-
>  conf/distro/cip-core-bookworm.conf            |  3 +
>  conf/distro/debian-bookworm-backports.list    |  1 +
>  ...eferences.swupdate-bookworm-backports.conf | 12 +++
>  doc/README.swupdate.md                        | 95 +++++++++++++++++++
>  kas/opt/delta-update.yml                      | 21 ++++
>  .../swupdate-handler-roundrobin_0.1.bb        |  2 +-
>  recipes-core/swupdate/swupdate_2023.05.bb     |  3 +
>  9 files changed, 259 insertions(+), 3 deletions(-)
>  create mode 100644 classes/delta_update.bbclass
>  create mode 100644 conf/distro/debian-bookworm-backports.list
>  create mode 100644 conf/distro/preferences.swupdate-bookworm-backports.conf
>  create mode 100644 kas/opt/delta-update.yml
> 

Thanks a lot for sharing! This is great step forward, even if we still
have some remarks how to make things even more user friendly.

Jan

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