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Currently, ExcludeFiles= supports excluding directories on the host
from being copied. Let's extend this to also support preventing files
from being copied into specific directories in the partition by adding
a new option ExcludeFilesTarget=. An example where this is useful is
when setting up btrfs subvolumes in the top level that are intended to
be mounted into specific locations, so /usr would be stored in @usr,
/home in @home, .... To accomplish this, we need to copy /usr to @usr
and prevent any files from being copied into /usr in the partition,
which with this commit, we'd be able to do as follows:
```
[Partition]
CopyFiles=/usr:@usr
ExcludeFilesTarget=/usr
```
Starting with commit acc1954a0394, udevadm verify also checks token
delimiters, which are not necessarily a matter of udev rules syntax,
but rather a question of style and readability. Mention that in the
documentation to avoid confusion.
Suggested-by: Martin Wilck <mwilck@suse.com>
Complements: acc1954a0394 ("udev-rules: check token delimiters")
As documented in integritysetup.8, dm-integrity devices support running
without a journal whatsoever. This change allows the
CRYPT_ACTIVATE_NO_JOURNAL flag (the same as is used with `integritysetup
--integrity-no-journal`) to be passed in during dmsetup by specifying
the `no-journal` option in integritytab.5.
I started looking into https://github.com/uapi-group/specifications/issues/35.
BLS says:
> Otherwise [no existing XBOOTLDR partition], if on GPT and an ESP is found and
> it is large enough (let’s say at least 1G) it should be used as $BOOT and
> used as primary location to place boot loader menu resources in.
> It is recommended to mount $BOOT to /boot/, and the ESP to /efi/.
DPS says:
> The ESP used for the current boot is automatically mounted to /efi/ (or
> /boot/ as fallback), unless a different partition is mounted there (possibly
> via /etc/fstab, or because the Extended Boot Loader Partition — see below —
> exists) or the directory is non-empty on the root disk.
I don't think we want to mount the same partition in two places.
If the same partition is not mounted in two places, then the two specs are
contradictory.
The code in gpt-auto-generator implemented the logic from the DPS. It is
modified to implement the logic from BLS.
Effectively:
- if both /boot and /efi are available:
- if both XBOOTLDR and ESP exist:
ESP on /efi, XBOOTLDR on /boot
- if only ESP exists:
ESP on /boot
- if only XBOOTLDR exists:
XBOOTLDR on /boot
- if only /boot is available:
- if XBOOTLDR exists:
XBOOTLDR on /boot
- if only ESP exists:
ESP on /boot
- if only /efi is available:
- if ESP exists:
ESP on /efi
"Available" means that it the mount point is not mounted over and does not
contain files. If the directory doesn't exist, it is also "available" and will
be created later when the mount or automount unit is started.
Thus, the generator attempts to match the partitions and mount points to the
extent possible. In all cases, /boot is the primary place to install kernels.
ESP can be found on /boot or /efi, depending on the situation.
If this patch is merged, I'll submit fixes for BLS and DPS to describe the
same logic.
Previously, even if a.service has JoinsNamespaceOf=b.service, the
inverse direction of reference was not introduced.
Hence, a.service is started earlier than b.service, the namespace will
not shared with b.service.
Also, even if a.service had the reference to b.service, b.service did not.
If b.service is freed earlier, then unit_clear_dependencies() does not clear
the reference from a to b, and will cause use-after-free on unit_free() for
a.service.
Let's make JoinsNamespaceOf=b.service in a.service implies the inverse
dependency, i.e. JoinsNamespaceOf=a.service for b.service. Then, we can safely
free b.service.
Files placed in /EFI/Linux/UKI.efi.extra.d/ and /loader/addons/ are
opened and verified using the LoadImage protocol, and will thus get
verified via shim/firmware.
If they are valid signed PE files, the .cmdline section will be
extracted and appended. If there are multiple addons in each directory,
they will be parsed in alphanumerical order.
Optionally the .uname sections are also matched if present, so
that they can be used to filter out addons as well if needed, and only
addons that correspond exactly to the UKI being loaded are used.
It is recommended to also always add a .sbat section to addons, so
that they can be mass-revoked with just a policy update.
The files must have a .addon.efi suffix.
Files in the per-UKI directory are parsed, sorted, measured and
appended first. Then, files in the generic directory are processed.
In order to ensure addons can always be revoked via SBAT, and it is not
left out by mistake, have a default metadata entry if none is specified
by the caller.
https://github.com/rhboot/shim/blob/main/SBAT.md
Now, the following kernel command line options are supported:
systemd.mount-extra=what:where:fstype:options
systemd.swap-extra=what:options
Closes#27260.
PCR1, where SMBIOS strings are measured, is filled with data that is not
under the control of the machine owner. Measure cmdline extensions in
PCR12 too, where we measure other optional addons that are loaded by
sd-stub.
Let's flat out refuse to configure machine-id on a running system with
systemd-firstboot. It wouldn't work anyway, because by the time firstboot is
started, pid1 has created /etc/machine-id, possibly with "unitialized", so
firstboot wouldn't touch the file. (If --force is specified, it works. So
let's allow that in case people want to do crazy things.)
While at it, add missing descriptions of various things that were added over
time, and group descriptions of similar options together.
When udevadm verify is invoked by an analyzer tool like rpminspect
to verify individual udev rules files, the summary just clutters the
output, so provide an option to turn the summary off.
This adds two verbs, edit and cat, to networkctl for
operating on network configs (namely .network, .netdev
and .link files). Specially, if the config name is
prefixed by @, it will be treated as network interface
name, and operations will be performed on config files
associated with the link.
Closes#26906
The goal of this change is to delay getty services until after
systemd-vconsole-setup has finished. systemd-vconsole-setup starts loadkeys,
and it seems that when loadkeys is interrupted by the TTY hangup call we do
when starting tty services [1], so that loadkeys starts getting EIO from the
ioctl("/dev/tty1", KDSKBENT) syscall it does.
Fixes#26908.
[1] https://github.com/legionus/kbd/issues/92#issuecomment-1554451788
Initially I wanted to add ordering dependencies to individual units, but
TTYVHangup= can be added to other various external units too. The solution with
an implicit dependency should cover those cases too.
Dump*() methods can take quite some time due to the amount of data to
serialize, so they can potentially stall the manager. Make them
privileged, as they are debugging tools anyway. Use a new 'dump'
capability for polkit, and the 'reload' capability for SELinux, as
that's also non-destructive but slow.
If the caller is not privileged, allow it but rate limited to 10 calls
every 10 minutes.
This reverts part of commit bd2538b50ba283c9ce39142d5d16d90184a55b90,
specifically changes to the description of service state between auto-restarts.
Fixes#27594
Fixes#26413: the docs said that the filter prevents writes, but it just a
filter at the system call level, and some of those calls are used for writing
and reading. This is confusing esp. when a higher level library call like
ntp_gettime() is denied.
I don't think it's realistic that we'll make the filter smarter in the near
future, so let's change the docs to describe the implementation.
Also, split out the advice part into a separate paragraph.
Before libsystemd-daemon, libsystemd-journal, libsystemd-id128, etc., were
merged into libsystemd, it was enough to have individual man pages for them.
But they have been delivered as one thing for many years, so it's better to
have a landing page for libsystemd. It mostly directs to individual pages
anyway.
