Add gpt_probe() which probes for a GPT partition table at various sector
sizes (512-4096) and optionally returns the header and partition entries.
Returns the detected sector size on success, 0 if no GPT was found, or
negative errno on error.
Refactor probe_sector_size() in dissect-image.c to be a thin wrapper
around gpt_probe().
Co-developed-by: Claude Opus 4.6 <noreply@anthropic.com>
The default image policy for the verity sig partition expects
the r/o flag to be set, but repart so far did not add it by
default if unset, like it does for the verity partition
Let's rename the existing partition_verity_to_data() to
partition_verity_hash_to_data() and make a new partition_verity_to_data() that
handles both verity hash and verity signature partitions.
Rename other functions to match the new naming.
When mounting a disk image we return a bunch of mount fds referencing
the various partitions in the disk, along with some metadata about them.
One key metadata field is the "designator" which is supposed to tell
clients what is what, and where to mount it.
Let's make this more explicit: let's also include the literal relative
path where each mount shall be placed, to simplify implementations of
clients that do not care about the concept of designators.
Same as the other aliases. Allows chaining commands like:
$ systemd-id128 show -P root-$(dpkg-architecture --query DEB_HOST_ARCH)
4f68bce3e8cd4db196e7fbcaf984b709
Let's make utf8_to_utf16() and utf16_to_utf8() a bit nicer to use by
adding shortcuts for common cases.
This is particularly relevant for utf16_to_utf8() since the
multiplication with 2 is easy to forget.
In mkosi we set the default architecture to platform.machine() which
is again slightly incompatible for a few architectures, so add more
aliases, so that repart works by default with these names.
The DSP and our implementation mixes Debian terminology with CPU
terminology. It uses arm64 which is a Debian thing instead of
aarch64, but x86-64 which is a CPU thing instead of amd64.
Add some convenience and transparent aliasing, so that we don't
need to maintain architecture-specific and tool-specific translation
layers in mkosi among other places, while at the same time the DDIs
still look the same (ie: the partlabel does not change depending on
which alias is used, the canonical label is used on disk).
Instead of exposing just the partition type UUID, let's expose the
GptPartitionType struct, which has a lot more information available
in a much more accessible way.
Also, let's get rid of SECONDARY/OTHER in PartitionDesignator. These
were only there to support preferred architectures in dissect-image.c,
but we can easily handle that by comparing architectures when we decide
whether to override a partition. This is done in a new function
compare_arch().
I think those constants are generally useful. It's quite easy to make a mistake
when copying things from the docs, so let's make them easy and convenient to
access.
We expose various other forms of UUID helpers already, i.e.
SD_ID128_UUID_FORMAT_STR and SD_ID128_MAKE_UUID_STR(), and we parse
UUIDs, hence add a high-level helper for formatting UUIDs too.
This doesn't add any new code, it just moves some helpers
id128-util.[ch] → sd-id128.[ch], to make them public.
I don't think we want people to send us pull requests over the next two years.
Let's just make something up ourselves, this is going to have at least as good
results, and will be much quicker.
Note that this only includes architectures for which there's some indication
that they are in active use. In architecture.h there are some more esoteric
ones like ARC_BE. We can add those if there's some actual user demand.
In particular, I included everything on the Debian "List of official ports" [1]
and a few other arches that we have received patches for in recent times.
[1] https://www.debian.org/ports/#portlist-released
This is useful for provisioning initially empty secondary A/B root file
systems. We don't want those to ever be considered for automatic
mounting, for example in "systemd-nspawn --image=", hence we should
create them with the No-Auto flag turned on. Once a file system image is
dropped into the partition the flag may be turned off by the updater
tool, so that it is considered from then on.
Thew new option for this is called NoAuto. I dislike negated options
like this, but this is taken from the naming in the spec, which in turn
inherited the name from the same flag for Microsoft Data Partitions. To
minimize confusion, let's stick to the name hence.
Let's make the GPT partition flags configurable when creating new
partitions. This is primarily useful for the read-only flag (which we
want to set for verity enabled partitions).
This adds two settings for this: Flags= and ReadOnly=, which strictly
speaking are redundant. The main reason to have both is that usually the
ReadOnly= setting is the one wants to control, and it' more generic.
Moreover we might later on introduce inherting of flags from CopyBlocks=
partitions, where one might want to control most flags as is except for
the RO flag and similar, hence let's keep them separate.
Daan De Meyer
Luca Boccassi
Daan De Meyer
Lennart Poettering
Luca Boccassi
Zbigniew Jędrzejewski-Szmek
Roland Hieber
Yu Watanabe
Sam James
Xiaotian Wu
WANG Xuerui
Dimitri John Ledkov