GPIO interface uses deprecated GPIO sysfs interface and should use the GPIO character device

[Siggi Skulason]

[SRU] 2.72: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/2124239

[ Impact ]

sysfs GPIO
----------
User-mode GPIO (General Purpose Input/Output) has historically been performed via the legacy “integer-based”sysfs pseudo file system.

chardev GPIO
------------
The new way of doing GPIO is via the “descriptor-based” character device ABI (Application Binary Interface). The interface is exposed at /dev/gpiochipN or /sys/bus/gpiochipN where N is the chip number.

Support for the GPIO character device is now available through:
- gpio-control interface (snapd 2.65): https://snapcraft.io/docs/gpio-control-interface
- gpio-chardev interface (snapd 2.72): https://snapcraft.io/docs/gpio-chardev-interface

[ Test Plan ]

1. Reproduce with snapd snap < 2.72

Not relevant.

2. Prove fixed with snapd snap 2.72

The functionality is covered by snapd spread test: tests/core/interfaces-gpio-chardev/task.yaml

Ensure the spread test completes for all relevant systems.

---original---

The snapd builtin gpio interface provides access to the GPIO sysfs Interface for userspace at sys/class/gpio/gpio

https://github.com/snapcore/snapd/blob/45d65822c95b7f7f4120ec4a9723f2af0bb5b4b8/interfaces/builtin/gpio.go#L44

The GPIO sysfs interface has however been deprecated since version 4.8 of the kernel and the snapd GPIO interface should provide access to /sys/bus/gpiochipN (or /dev/gpiochipN) as well.

Reference:

1) https://www.kernel.org/doc/html/latest/admin-guide/gpio/sysfs.html

"Warning
THIS ABI IS DEPRECATED, THE ABI DOCUMENTATION HAS BEEN MOVED TO Documentation/ABI/obsolete/sysfs-gpio AND NEW USERSPACE CONSUMERS ARE SUPPOSED TO USE THE CHARACTER DEVICE ABI. THIS OLD SYSFS ABI WILL NOT BE DEVELOPED (NO NEW FEATURES), IT WILL JUST BE MAINTAINED."

2)https://www.kernel.org/doc/Documentation/ABI/obsolete/sysfs-gpio

"This ABI is deprecated and will be removed after 2020. It is
replaced with the GPIO character device."

3) https://www.kernel.org/doc/html/latest/driver-api/gpio/intro.html

The descriptor-based interface is the preferred way to manipulate GPIOs, and is described by all the files in this directory excepted gpio-legacy.txt.
The legacy integer-based interface which is considered deprecated (but still usable for compatibility reasons) is documented in gpio-legacy.txt.

4) https://www.beyondlogic.org/an-introduction-to-chardev-gpio-and-libgpiod-on-the-raspberry-pi/

sysfs GPIO
User-mode GPIO (General Purpose Input/Output) has historically been performed via the legacy “integer-based”sysfs pseudo file system. For example, to set GPIO25, one would:

# echo out > /sys/class/gpio/gpio25/direction
# echo 1 > /sys/class/gpio/gpio25/value
GPIO access via this legacy sysfs interface has been deprecated since version 4.8 of the Linux kernel.

chardev GPIO
The new way of doing GPIO is via the “descriptor-based” character device ABI (Application Binary Interface). The interface is exposed at /dev/gpiochipN or /sys/bus/gpiochipN where N is the chip number.

[Zeyad Gouda (zeyadgouda)]

Support for the GPIO character device is now available through:
- gpio-control interface (snapd 2.65): https://snapcraft.io/docs/gpio-control-interface
- gpio-chardev interface (snapd 2.72): https://snapcraft.io/docs/gpio-chardev-interface

[Julian Andres Klode (juliank)]

Hello Siggi, or anyone else affected,

Accepted snapd into questing-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/snapd/2.72+ubuntu25.10.2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-questing to verification-done-questing. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-questing. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Julian Andres Klode (juliank)]

Hello Siggi, or anyone else affected,

Accepted snapd into plucky-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/snapd/2.72+ubuntu25.04 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-plucky to verification-done-plucky. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-plucky. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Julian Andres Klode (juliank)]

Hello Siggi, or anyone else affected,

Accepted snapd into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/snapd/2.72+ubuntu24.04 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-noble. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Julian Andres Klode (juliank)]

Hello Siggi, or anyone else affected,

Accepted snapd into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/snapd/2.72+ubuntu22.04 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted snapd (2.72+ubuntu24.04) for noble have finished running.
The following regressions have been reported in tests triggered by the package:

docker.io-app/28.2.2-0ubuntu1~24.04.1 (amd64, arm64, ppc64el, s390x)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/noble/update_excuses.html#snapd

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted snapd (2.72+ubuntu22.04) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

docker.io-app/28.2.2-0ubuntu1~22.04.1 (amd64, ppc64el, s390x)
livecd-rootfs/2.765.55 (amd64)
systemd/249.11-0ubuntu3.17 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#snapd

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted snapd (2.72+ubuntu25.10.2) for questing have finished running.
The following regressions have been reported in tests triggered by the package:

linux-realtime/6.17.0-1002.3 (amd64)
livecd-rootfs/25.10.24 (arm64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/questing/update_excuses.html#snapd

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted snapd (2.72+ubuntu25.04) for plucky have finished running.
The following regressions have been reported in tests triggered by the package:

docker.io-app/28.2.2-0ubuntu1~25.04.1 (amd64, arm64, ppc64el, s390x)
systemd/257.4-1ubuntu3.2 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/plucky/update_excuses.html#snapd

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package snapd - 2.72+ubuntu26.04.1

---------------
snapd (2.72+ubuntu26.04.1) resolute; urgency=medium

  * New upstream release, LP: #2124239
    - FDE: support replacing TPM protected keys at runtime via the
      /v2/system-volumes endpoint
    - FDE: support secboot preinstall check fix actions for 25.10+
      hybrid installs via the /v2/system/{label} endpoint
    - FDE: tweak polkit message to remove jargon
    - FDE: ensure proper sealing with kernel command line defaults
    - FDE: provide generic reseal function
    - FDE: support using OPTEE for protecting keys, as an alternative to
      existing fde-setup hooks (Ubuntu Core only)
    - Confdb: 'snapctl get --view' supports passing default values
    - Confdb: content sub-rules in confdb-schemas inherit their parent
      rule's "access"
    - Confdb: make confdb error kinds used in API more generic
    - Confdb: fully support lists and indexed paths (including unset)
    - Prompting: add notice backend for prompting types (unused for now)
    - Prompting: include request cgroup in prompt
    - Prompting: handle unsupported xattrs
    - Prompting: add permission mapping for the camera interface
    - Notices: read notices from state without state lock
    - Notices: add methods to get notice fields and create, reoccur, and
      deepcopy notice
    - Notices: add notice manager to coordinate separate notice backends
    - Notices: support draining notices from state when notice backend
      registered as producer of a particular notice type
    - Notices: query notice manager from daemon instead of querying
      state for notices directly
    - Packaging: Ubuntu | ignore .git directory
    - Packaging: FIPS | bump deb Go FIPS to 1.23
    - Packaging: snap | bump FIPS toolchain to 1.23
    - Packaging: debian | sync most upstream changes
    - Packaging: debian-sid | depends on libcap2-bin for postint
    - Packaging: Fedora | drop fakeroot
    - Packaging: snap | modify snapd.mk to pass build tags when running
      unit tests
    - Packaging: snap | modify snapd.mk to pass nooptee build tag
    - Packaging: modify Makefile.am to fix snap-confine install profile
      with 'make hack'
    - Packaging: modify Makefile.am to fix out-of-tree use of 'make
      hack'
    - LP: #2122054 Snap installation: skip snap icon download when
      running in a cloud or using a proxy store
    - Snap installation: add timeout to http client when downloading
      snap icon
    - Snap installation: use http(s) proxy for icon downloads
    - LP: #2117558 snap-confine: fix error message with /root/snap not
      accessible
    - snap-confine: fix non-suid limitation by switching to root:root to
      operate v1 freezer
    - core-initrd: do not use writable-paths when not available
    - core-initrd: remove debian folder
    - LP: #1916244 Interfaces: gpio-chardev | re-enable the gpio-chardev
      interface now with the more robust gpio-aggregator configfs kernel
      interface
    - Interfaces: gpio-chardev | exclusive snap connections, raise a
      conflict when both gpio-chardev and gpio are connected
    - Interfaces: gpio-chardev | fix gpio-aggregator module lo...

[Ernest Lotter (ernestl)]

The required spread tests was run as part of
snapd QA testing on proposed:

https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/2124239/comments/30

[Andreas Hasenack (ahasenack)]

note to self: SRU ok for release

[Andreas Hasenack (ahasenack)]

The verification of the Stable Release Update for snapd has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package snapd - 2.72+ubuntu25.04

---------------
snapd (2.72+ubuntu25.04) plucky; urgency=medium

  * New upstream release, LP: #2124239
    - FDE: support replacing TPM protected keys at runtime via the
      /v2/system-volumes endpoint
    - FDE: support secboot preinstall check fix actions for 25.10+
      hybrid installs via the /v2/system/{label} endpoint
    - FDE: tweak polkit message to remove jargon
    - FDE: ensure proper sealing with kernel command line defaults
    - FDE: provide generic reseal function
    - FDE: support using OPTEE for protecting keys, as an alternative to
      existing fde-setup hooks (Ubuntu Core only)
    - Confdb: 'snapctl get --view' supports passing default values
    - Confdb: content sub-rules in confdb-schemas inherit their parent
      rule's "access"
    - Confdb: make confdb error kinds used in API more generic
    - Confdb: fully support lists and indexed paths (including unset)
    - Prompting: add notice backend for prompting types (unused for now)
    - Prompting: include request cgroup in prompt
    - Prompting: handle unsupported xattrs
    - Prompting: add permission mapping for the camera interface
    - Notices: read notices from state without state lock
    - Notices: add methods to get notice fields and create, reoccur, and
      deepcopy notice
    - Notices: add notice manager to coordinate separate notice backends
    - Notices: support draining notices from state when notice backend
      registered as producer of a particular notice type
    - Notices: query notice manager from daemon instead of querying
      state for notices directly
    - Packaging: Ubuntu | ignore .git directory
    - Packaging: FIPS | bump deb Go FIPS to 1.23
    - Packaging: snap | bump FIPS toolchain to 1.23
    - Packaging: debian | sync most upstream changes
    - Packaging: debian-sid | depends on libcap2-bin for postint
    - Packaging: Fedora | drop fakeroot
    - Packaging: snap | modify snapd.mk to pass build tags when running
      unit tests
    - Packaging: snap | modify snapd.mk to pass nooptee build tag
    - Packaging: modify Makefile.am to fix snap-confine install profile
      with 'make hack'
    - Packaging: modify Makefile.am to fix out-of-tree use of 'make
      hack'
    - LP: #2122054 Snap installation: skip snap icon download when
      running in a cloud or using a proxy store
    - Snap installation: add timeout to http client when downloading
      snap icon
    - Snap installation: use http(s) proxy for icon downloads
    - LP: #2117558 snap-confine: fix error message with /root/snap not
      accessible
    - snap-confine: fix non-suid limitation by switching to root:root to
      operate v1 freezer
    - core-initrd: do not use writable-paths when not available
    - core-initrd: remove debian folder
    - LP: #1916244 Interfaces: gpio-chardev | re-enable the gpio-chardev
      interface now with the more robust gpio-aggregator configfs kernel
      interface
    - Interfaces: gpio-chardev | exclusive snap connections, raise a
      conflict when both gpio-chardev and gpio are connected
    - Interfaces: gpio-chardev | fix gpio-aggregator module load ord...

[Launchpad Janitor (janitor)]

This bug was fixed in the package snapd - 2.72+ubuntu24.04

---------------
snapd (2.72+ubuntu24.04) noble; urgency=medium

  * New upstream release, LP: #2124239
    - FDE: support replacing TPM protected keys at runtime via the
      /v2/system-volumes endpoint
    - FDE: support secboot preinstall check fix actions for 25.10+
      hybrid installs via the /v2/system/{label} endpoint
    - FDE: tweak polkit message to remove jargon
    - FDE: ensure proper sealing with kernel command line defaults
    - FDE: provide generic reseal function
    - FDE: support using OPTEE for protecting keys, as an alternative to
      existing fde-setup hooks (Ubuntu Core only)
    - Confdb: 'snapctl get --view' supports passing default values
    - Confdb: content sub-rules in confdb-schemas inherit their parent
      rule's "access"
    - Confdb: make confdb error kinds used in API more generic
    - Confdb: fully support lists and indexed paths (including unset)
    - Prompting: add notice backend for prompting types (unused for now)
    - Prompting: include request cgroup in prompt
    - Prompting: handle unsupported xattrs
    - Prompting: add permission mapping for the camera interface
    - Notices: read notices from state without state lock
    - Notices: add methods to get notice fields and create, reoccur, and
      deepcopy notice
    - Notices: add notice manager to coordinate separate notice backends
    - Notices: support draining notices from state when notice backend
      registered as producer of a particular notice type
    - Notices: query notice manager from daemon instead of querying
      state for notices directly
    - Packaging: Ubuntu | ignore .git directory
    - Packaging: FIPS | bump deb Go FIPS to 1.23
    - Packaging: snap | bump FIPS toolchain to 1.23
    - Packaging: debian | sync most upstream changes
    - Packaging: debian-sid | depends on libcap2-bin for postint
    - Packaging: Fedora | drop fakeroot
    - Packaging: snap | modify snapd.mk to pass build tags when running
      unit tests
    - Packaging: snap | modify snapd.mk to pass nooptee build tag
    - Packaging: modify Makefile.am to fix snap-confine install profile
      with 'make hack'
    - Packaging: modify Makefile.am to fix out-of-tree use of 'make
      hack'
    - LP: #2122054 Snap installation: skip snap icon download when
      running in a cloud or using a proxy store
    - Snap installation: add timeout to http client when downloading
      snap icon
    - Snap installation: use http(s) proxy for icon downloads
    - LP: #2117558 snap-confine: fix error message with /root/snap not
      accessible
    - snap-confine: fix non-suid limitation by switching to root:root to
      operate v1 freezer
    - core-initrd: do not use writable-paths when not available
    - core-initrd: remove debian folder
    - LP: #1916244 Interfaces: gpio-chardev | re-enable the gpio-chardev
      interface now with the more robust gpio-aggregator configfs kernel
      interface
    - Interfaces: gpio-chardev | exclusive snap connections, raise a
      conflict when both gpio-chardev and gpio are connected
    - Interfaces: gpio-chardev | fix gpio-aggregator module load orde...

[Launchpad Janitor (janitor)]

This bug was fixed in the package snapd - 2.72+ubuntu22.04

---------------
snapd (2.72+ubuntu22.04) jammy; urgency=medium

  * New upstream release, LP: #2124239
    - FDE: support replacing TPM protected keys at runtime via the
      /v2/system-volumes endpoint
    - FDE: support secboot preinstall check fix actions for 25.10+
      hybrid installs via the /v2/system/{label} endpoint
    - FDE: tweak polkit message to remove jargon
    - FDE: ensure proper sealing with kernel command line defaults
    - FDE: provide generic reseal function
    - FDE: support using OPTEE for protecting keys, as an alternative to
      existing fde-setup hooks (Ubuntu Core only)
    - Confdb: 'snapctl get --view' supports passing default values
    - Confdb: content sub-rules in confdb-schemas inherit their parent
      rule's "access"
    - Confdb: make confdb error kinds used in API more generic
    - Confdb: fully support lists and indexed paths (including unset)
    - Prompting: add notice backend for prompting types (unused for now)
    - Prompting: include request cgroup in prompt
    - Prompting: handle unsupported xattrs
    - Prompting: add permission mapping for the camera interface
    - Notices: read notices from state without state lock
    - Notices: add methods to get notice fields and create, reoccur, and
      deepcopy notice
    - Notices: add notice manager to coordinate separate notice backends
    - Notices: support draining notices from state when notice backend
      registered as producer of a particular notice type
    - Notices: query notice manager from daemon instead of querying
      state for notices directly
    - Packaging: Ubuntu | ignore .git directory
    - Packaging: FIPS | bump deb Go FIPS to 1.23
    - Packaging: snap | bump FIPS toolchain to 1.23
    - Packaging: debian | sync most upstream changes
    - Packaging: debian-sid | depends on libcap2-bin for postint
    - Packaging: Fedora | drop fakeroot
    - Packaging: snap | modify snapd.mk to pass build tags when running
      unit tests
    - Packaging: snap | modify snapd.mk to pass nooptee build tag
    - Packaging: modify Makefile.am to fix snap-confine install profile
      with 'make hack'
    - Packaging: modify Makefile.am to fix out-of-tree use of 'make
      hack'
    - LP: #2122054 Snap installation: skip snap icon download when
      running in a cloud or using a proxy store
    - Snap installation: add timeout to http client when downloading
      snap icon
    - Snap installation: use http(s) proxy for icon downloads
    - LP: #2117558 snap-confine: fix error message with /root/snap not
      accessible
    - snap-confine: fix non-suid limitation by switching to root:root to
      operate v1 freezer
    - core-initrd: do not use writable-paths when not available
    - core-initrd: remove debian folder
    - LP: #1916244 Interfaces: gpio-chardev | re-enable the gpio-chardev
      interface now with the more robust gpio-aggregator configfs kernel
      interface
    - Interfaces: gpio-chardev | exclusive snap connections, raise a
      conflict when both gpio-chardev and gpio are connected
    - Interfaces: gpio-chardev | fix gpio-aggregator module load orde...

[Launchpad Janitor (janitor)]

This bug was fixed in the package snapd - 2.72+ubuntu25.10.2

---------------
snapd (2.72+ubuntu25.10.2) questing; urgency=medium

  * New upstream release, LP: #2124239
    - FDE: support replacing TPM protected keys at runtime via the
      /v2/system-volumes endpoint
    - FDE: support secboot preinstall check fix actions for 25.10+
      hybrid installs via the /v2/system/{label} endpoint
    - FDE: tweak polkit message to remove jargon
    - FDE: ensure proper sealing with kernel command line defaults
    - FDE: provide generic reseal function
    - FDE: support using OPTEE for protecting keys, as an alternative to
      existing fde-setup hooks (Ubuntu Core only)
    - Confdb: 'snapctl get --view' supports passing default values
    - Confdb: content sub-rules in confdb-schemas inherit their parent
      rule's "access"
    - Confdb: make confdb error kinds used in API more generic
    - Confdb: fully support lists and indexed paths (including unset)
    - Prompting: add notice backend for prompting types (unused for now)
    - Prompting: include request cgroup in prompt
    - Prompting: handle unsupported xattrs
    - Prompting: add permission mapping for the camera interface
    - Notices: read notices from state without state lock
    - Notices: add methods to get notice fields and create, reoccur, and
      deepcopy notice
    - Notices: add notice manager to coordinate separate notice backends
    - Notices: support draining notices from state when notice backend
      registered as producer of a particular notice type
    - Notices: query notice manager from daemon instead of querying
      state for notices directly
    - Packaging: Ubuntu | ignore .git directory
    - Packaging: FIPS | bump deb Go FIPS to 1.23
    - Packaging: snap | bump FIPS toolchain to 1.23
    - Packaging: debian | sync most upstream changes
    - Packaging: debian-sid | depends on libcap2-bin for postint
    - Packaging: Fedora | drop fakeroot
    - Packaging: snap | modify snapd.mk to pass build tags when running
      unit tests
    - Packaging: snap | modify snapd.mk to pass nooptee build tag
    - Packaging: modify Makefile.am to fix snap-confine install profile
      with 'make hack'
    - Packaging: modify Makefile.am to fix out-of-tree use of 'make
      hack'
    - LP: #2122054 Snap installation: skip snap icon download when
      running in a cloud or using a proxy store
    - Snap installation: add timeout to http client when downloading
      snap icon
    - Snap installation: use http(s) proxy for icon downloads
    - LP: #2117558 snap-confine: fix error message with /root/snap not
      accessible
    - snap-confine: fix non-suid limitation by switching to root:root to
      operate v1 freezer
    - core-initrd: do not use writable-paths when not available
    - core-initrd: remove debian folder
    - LP: #1916244 Interfaces: gpio-chardev | re-enable the gpio-chardev
      interface now with the more robust gpio-aggregator configfs kernel
      interface
    - Interfaces: gpio-chardev | exclusive snap connections, raise a
      conflict when both gpio-chardev and gpio are connected
    - Interfaces: gpio-chardev | fix gpio-aggregator module lo...