Re: [PATCH 0/5] Make ext4 images reproducible

["MOESSBAUER, Felix" <felix.moessbauer@siemens.com>]

On Thu, 2023-12-07 at 21:11 +0530, venkata.pyla@toshiba-tsip.com wrote:
> From: venkata pyla <venkata.pyla@toshiba-tsip.com>
> 
> Hi,
> 
> The following series of patches will help to fix reproducible build
> issues in ext4 file systems.
> 
> Verified with following steps:
> 
> ```
> 
> $ git clone http://github.com/ilbers/isar.git
> $ cd isar
> $ . isar-init-build-env ../build
> 
> configure image parameters
> $ cd isar
> $ cat <<EOT >> conf/local.conf
> SOURCE_DATE_EPOCH = "$(git log -1 --pretty=%ct)"
> IMAGE_FSTYPES = "wic"
> WIC_DEPLOY_PARTITIONS = "1"
> EOT
> 
> # First Build
> $ cd ../build
> $ sudo rm -rf tmp sstate-cache
> $ bitbake mc:qemuamd64-bookworm:isar-image-base
> $ mv tmp/deploy/images/qemuamd64/ ../qemuamd64-1
> 
> # Second Build
> $ sudo rm -rf tmp sstate-cache

Hi,

just out of curiosity: Did you also have a look a building with sstate
cache? Are there reproducibility issues?

In the past I fixed a couple of these, but I'm not 100% sure if we
still have some (esp. around the rootfs caching).

Happy Coding!
Felix

> $ bitbake mc:qemuamd64-bookworm:isar-image-base
> $ mv tmp/deploy/images/qemuamd64/ ../qemuamd64-2
> 
> # compare ext4 images with diffoscope
> $ diffoscope qemuamd64-1/isar-image-base-debian-bookworm-
> qemuamd64.wic.p2 \
>         qemuamd64-2/isar-image-base-debian-bookworm-qemuamd64.wic.p2
> 
> ```
> 
> venkata pyla (5):
>   linux-module: Use debug-prefix-map to build modules
> deterministically
>   wic: Set file system uuid to ext4 partitions
>   wic: use E2FSPROGS_FAKE_TIME and hash_seed to generate reproducible
>     ext4 images
>   wic: honor the SOURCE_DATE_EPOCH in case of updated fstab
>   wic: make ext2/3/4 images reproducible
> 
>  .../lib/wic/canned-wks/common-isar.wks.inc    |  2 +-
>  .../lib/wic/canned-wks/de0-nano-soc.wks.in    |  2 +-
>  .../lib/wic/canned-wks/efi-plus-pcbios.wks    |  2 +-
>  .../scripts/lib/wic/canned-wks/hikey.wks      |  2 +-
>  .../lib/wic/canned-wks/multipart-efi.wks      |  4 +-
>  .../lib/wic/canned-wks/nanopi-neo-efi.wks.in  |  2 +-
>  .../lib/wic/canned-wks/nanopi-neo.wks.in      |  2 +-
>  .../scripts/lib/wic/canned-wks/rpi-sdimg.wks  |  2 +-
>  .../wic/canned-wks/sdimage-efi-sb-debian.wks  |  2 +-
>  .../lib/wic/canned-wks/sdimage-efi-sd.wks     |  2 +-
>  .../lib/wic/canned-wks/sdimage-efi.wks        |  2 +-
>  .../lib/wic/canned-wks/sifive-fu540.wks       |  2 +-
>  .../canned-wks/starfive-visionfive2.wks.in    |  2 +-
>  .../lib/wic/canned-wks/stm32mp15x.wks.in      |  2 +-
>  .../linux-module/files/debian/rules.tmpl      |  5 ++-
>  scripts/lib/wic/partition.py                  | 37
> ++++++++++++++++++-
>  scripts/lib/wic/plugins/imager/direct.py      |  3 ++
>  scripts/lib/wic/plugins/source/rootfs.py      |  2 +-
>  18 files changed, 59 insertions(+), 18 deletions(-)
>