Re: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and hash_seed to generate reproducible ext4 images

[Florian Bezdeka <florian.bezdeka@siemens.com>]

On Thu, 2023-12-28 at 06:02 +0000, Venkata.Pyla@toshiba-tsip.com wrote:
> > -----Original Message-----
> > From: isar-users@googlegroups.com <isar-users@googlegroups.com> On Behalf
> > Of Venkata.Pyla@toshiba-tsip.com
> > Sent: Tuesday, December 12, 2023 7:37 PM
> > To: florian.bezdeka@siemens.com; felix.moessbauer@siemens.com; isar-
> > users@googlegroups.com
> > Cc: jan.kiszka@siemens.com; hayashi kazuhiro(林 和宏 ＤＭＥ
> > ○ＤＩＧ□ＭＰＳ○ＭＰ４) <kazuhiro3.hayashi@toshiba.co.jp>; dinesh
> > kumar(ＴＳＩＰ TMIEC ODG Porting) <dinesh.kumar@toshiba-tsip.com>
> > Subject: RE: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and hash_seed to
> > generate reproducible ext4 images
> > 
> > 
> > 
> > > -----Original Message-----
> > > From: 'Florian Bezdeka' via isar-users <isar-users@googlegroups.com>
> > > Sent: Saturday, December 9, 2023 4:38 PM
> > > To: pyla venkata(ＴＳＩＰ TMIEC ODG Porting) <Venkata.Pyla@toshiba-
> > > tsip.com>; felix.moessbauer@siemens.com; isar-users@googlegroups.com
> > > Cc: jan.kiszka@siemens.com; hayashi kazuhiro(林 和宏 ＤＭＥ
> > > ○ＤＩＧ□ＭＰＳ○ＭＰ４) <kazuhiro3.hayashi@toshiba.co.jp>; dinesh
> > > kumar(ＴＳＩＰ TMIEC ODG Porting) <dinesh.kumar@toshiba-tsip.com>
> > > Subject: Re: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and hash_seed to
> > > generate reproducible ext4 images
> > > 
> > > On Fri, 2023-12-08 at 18:14 +0000, Venkata.Pyla@toshiba-tsip.com wrote:
> > > > > -----Original Message-----
> > > > > From: 'MOESSBAUER, Felix' via isar-users
> > > > > <isar-users@googlegroups.com>
> > > > > Sent: Friday, December 8, 2023 4:04 PM
> > > > > To: isar-users@googlegroups.com; pyla venkata(ＴＳＩＰ TMIEC ODG
> > > > > Porting) <Venkata.Pyla@toshiba-tsip.com>
> > > > > Cc: Kiszka, Jan <jan.kiszka@siemens.com>; hayashi kazuhiro(林 和宏
> > > ＤＭＥ
> > > > > ○ＤＩＧ□ＭＰＳ○ＭＰ４) <kazuhiro3.hayashi@toshiba.co.jp>; dinesh
> > > > > kumar(ＴＳＩＰ TMIEC ODG Porting) <dinesh.kumar@toshiba-tsip.com>
> > > > > Subject: Re: [PATCH 3/5] wic: use E2FSPROGS_FAKE_TIME and
> > > > > hash_seed to generate reproducible ext4 images
> > > > > 
> > > > > On Thu, 2023-12-07 at 21:11 +0530, venkata.pyla@toshiba-tsip.com
> > > wrote:
> > > > > > From: venkata pyla <venkata.pyla@toshiba-tsip.com>
> > > > > > 
> > > > > > E2FSPROGS_FAKE_TIME: sets fixed times for the inodes in the file
> > > > > > system.
> > > > > > hash_seed: creates reproducible directory indexes in the file system.
> > > > > > 
> > > > > > Reference commit in e2fsprogs:
> > > > > > e1f7100643a46456be107b33098f6034b0835e6d
> > > > > 
> > > > > Hi!
> > > > > 
> > > > > Did you also send this patch to OE?
> > > > > We need to integrate it there as well, as this is the basis for
> > > > > the ISAR
> > > plugins.
> > > > 
> > > > Not shared yet, I will send to OE as well.
> > > 
> > > We should follow "upstream first" here. Once OE has accepted the patch
> > > we will inherit it during next OE -> Isar update cycle.
> > 
> > I have shared this patch to OE [1], hope I will get feedback from the community
> > and will support to fix this issue in the OE itself.
> > 
> > [1] https://lists.openembedded.org/g/openembedded-core/message/192192
> 
> This patch [1] has been merged now in upstream OE-core,
>  now the required patches should be taken to ISAR, is there any timeline to bring the OE-core changes to ISAR or should we apply the required changes to ISAR manually? 
> 
> [1] https://github.com/openembedded/openembedded-core/commit/bb822ab75de0020572058090439b93cc56bbf7e0

That's great! Thanks for taking care.

I added two guys from Ilbers, maybe they have an update pending already
or can comment on the timeline. Anton, Uladzimir any comments?

In general it's a good idea to come up with a patch to speed things up.

The last update was done in 64af29bcc4b0 ("wic: Update to the latest
revision"). Might be used as inspiration.

Florian

> 
> > > 
> > > Maintainers: Do not apply it to Isar directly.
> > > 
> > > > 
> > > > > 
> > > > > Best regards,
> > > > > Felix
> > > > > 
> > > > > > 
> > > 
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