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Follow-up for ac24e418d9.
The original motivation of the commit and RFE #15339 is to start dhcpv6
client in managed mode when neither M nor O flag is set in the RA.
But, previously, if the setting is set to "always", then the DHCPv6
client is always started in managed mode even if O flag is set in the
RA. Such the behavior breaks RFC 7084.
FixedRandomDelay=yes will use
`siphash24(sd_id128_get_machine() || MANAGER_IS_SYSTEM(m) || getuid() || u->id)`,
where || is concatenation, instead of a random number to choose a value between
0 and RandomizedDelaySec= as the timer delay.
This essentially sets up a fixed, but seemingly random, offset for each timer
iteration rather than having a random offset recalculated each time it fires.
Closes#10355
Co-author: Anita Zhang <the.anitazha@gmail.com>
This beefs up the READ_FULL_FILE_CONNECT_SOCKET logic of
read_full_file_full() a bit: when used a sender socket name may be
specified. If specified as NULL behaviour is as before: the client
socket name is picked by the kernel. But if specified as non-NULL the
client can pick a socket name to use when connecting. This is useful to
communicate a minimal amount of metainformation from client to server,
outside of the transport payload.
Specifically, these beefs up the service credential logic to pass an
abstract AF_UNIX socket name as client socket name when connecting via
READ_FULL_FILE_CONNECT_SOCKET, that includes the requesting unit name
and the eventual credential name. This allows servers implementing the
trivial credential socket logic to distinguish clients: via a simple
getpeername() it can be determined which unit is requesting a
credential, and which credential specifically.
Example: with this patch in place, in a unit file "waldo.service" a
configuration line like the following:
LoadCredential=foo:/run/quux/creds.sock
will result in a connection to the AF_UNIX socket /run/quux/creds.sock,
originating from an abstract namespace AF_UNIX socket:
@$RANDOM/unit/waldo.service/foo
(The $RANDOM is replaced by some randomized string. This is included in
the socket name order to avoid namespace squatting issues: the abstract
socket namespace is open to unprivileged users after all, and care needs
to be taken not to use guessable names)
The services listening on the /run/quux/creds.sock socket may thus
easily retrieve the name of the unit the credential is requested for
plus the credential name, via a simpler getpeername(), discarding the
random preifx and the /unit/ string.
This logic uses "/" as separator between the fields, since both unit
names and credential names appear in the file system, and thus are
designed to use "/" as outer separators. Given that it's a good safe
choice to use as separators here, too avoid any conflicts.
This is a minimal patch only: the new logic is used only for the unit
file credential logic. For other places where we use
READ_FULL_FILE_CONNECT_SOCKET it is probably a good idea to use this
scheme too, but this should be done carefully in later patches, since
the socket names become API that way, and we should determine the right
amount of info to pass over.
This reverts commit 6c5496c492.
sysinit.target is shared between the initrd and the host system. Pulling in
initrd-cryptsetup.target into sysinit.target causes the following warning at
boot:
Oct 27 10:42:30 workstation-uefi systemd[1]: initrd-cryptsetup.target: Starting requested but asserts failed.
Oct 27 10:42:30 workstation-uefi systemd[1]: Assertion failed for initrd-cryptsetup.target.
v246 is long released. Hence the new scheme should be named v247.
(Interesting, how we pretty systematically for the last releases changed
the scheme only every second release)
The phrase "routing domains" is used to mean both route-only domains and search
domains. Route-only domains are always called like that, and not just "route domains".
Some paragraphs are reordered to describe synthetisized records first, then
LLMNR, then various ways quries are routed.
Fixes#8928, hopefully.
For encrypted block devices that we need to unlock from the initramfs,
we currently rely on dracut shipping `cryptsetup.target`. This works,
but doesn't cover the case where the encrypted block device requires
networking (i.e. the `remote-cryptsetup.target` version). That target
however is traditionally dynamically enabled.
Instead, let's rework things here by adding a `initrd-cryptsetup.target`
specifically for initramfs encrypted block device setup. This plays the
role of both `cryptsetup.target` and `remote-cryptsetup.target` in the
initramfs.
Then, adapt `systemd-cryptsetup-generator` to hook all generated
services to this new unit when running from the initrd. This is
analogous to `systemd-fstab-generator` hooking all mounts to
`initrd-fs.target`, regardless of whether they're network-backed or not.
Using `bootctl set-default @current` will set the default loader entry
to the currently booted entry as read from the `LoaderEntrySelected` EFI
variable.
Also `bootctl set-oneshot @current` will set the oneshot loader entry to
the current booted entry.
Correspondingly `@default` and `@oneshot` can be used to read from the
LoaderEntryDefault and LoaderEntryOneshot EFI variables.
Add a new target for synchronizing units that wish to run once during
the first boot of the system. The machine-id will be committed to disk
only after the target has been reached, thus ensuring that all units
ordered before it had a chance to complete.
No functional change is intended.
The general pattern of changes:
-usb:v04F3p2B7C*
+usb:v04F3p2B7C:*
This is mostly a clarification, to make the part that makes the usb vXXXXpYYYY
part visually separated. It would only make a difference if we added further
keys with a different number of digits, which is unlikely.
-usb:v0627p0001:*QEMU USB Keyboard*
-usb:v0627p0001:*QEMU USB Mouse*
-usb:v0627p0001:*QEMU USB Tablet*
+usb:v0627p0001:*QEMU USB Keyboard*:*
+usb:v0627p0001:*QEMU USB Mouse*:*
+usb:v0627p0001:*QEMU USB Tablet*:*
Again, only a clarification. We know that ":" will appear somewhere later in
the match key, so anything that matches "…Keyboard*" will also match "…Keyboard*:*".
-evdev:name:ETPS/2 Elantech Touchpad:dmi:*svnASUSTeKComputerInc.:pnN53SV*
+evdev:name:ETPS/2 Elantech Touchpad:dmi:*svnASUSTeKComputerInc.:pnN53SV:*
This makes the match narrower. Previously we would match product "N53SV"
and "N53SV2", "N53SV3", and others. Here we are saying that the ':pn' part must
match exactly. Most of the changes in this patch match this pattern. I made a few
judgement calls and used "pn…*:*" when I wasn't sure if the full pn is included:
-evdev:name:Dell WMI hotkeys:dmi:bvn*:bvr*:bd*:svnDell*:pnPrecision*
+evdev:name:Dell WMI hotkeys:dmi:bvn*:bvr*:bd*:svnDell*:pnPrecision*:*
-evdev:name:Cypress APA Trackpad ?cyapa?:dmi:*:svnHewlett-Packard*:pnFalco*:
+evdev:name:Cypress APA Trackpad ?cyapa?:dmi:*:svnHewlett-Packard*:pnFalco*:*
This more like the "QEMU" example above, since all dmi strings end in ":", so
anything which matches the old version will also match the new version.
-evdev:atkbd:dmi:bvn*:bvr*:bd*:svnGateway*:pnA0A1*:pvr*
+evdev:atkbd:dmi:bvn*:bvr*:bd*:svnGateway*:pnA0A1*:*
I replaced trailing ":pvr*" by ":*". This makes no functional difference because
we expect "pvr" to always appear in the dmi string. This makes patterns shorter.
-evdev:atkbd:dmi:bvn*:bvr*:bd*:svnAcer*:pn*
+evdev:atkbd:dmi:bvn*:bvr*:bd*:svnAcer*:pn*:*
OTOH, ":pn*" is kept. This is because almost patterns include ":pn*", and if we
skip it, we should make it clear that this is on purpose, that we really want to
match any product name.
The python script to generate autosuspend rules is updated to use ":*" too.
Inspired by https://github.com/systemd/systemd/pull/17281#discussion_r501489750.
bootctl implements three types of operation: those that work with an EFI
boot loader, those which work with any EFI boot loader that implements
the boot loader spec + interface, and finally those specific to sd-boot.
Previously the --help text and the man page mixed them all up. Let's put
them clearly in three separate sections however, to communicate clearly
what is supposed to work everywhere, and what is specific to
systemd-boot or boot loaders implementing the two specs.
This adjusts wording here and there, but is mostly just about
re-ordering existing docs, and putting them under new sections.
We would return ENOENT, which is extremely confusing. Strace is not helpful because
no *file* is actually missing. So let's add some logs at debug level and also use
a custom return code. Let all user-facing utilities print a custom error message
in that case.
The variable is renamed to SYSTEMD_PAGERSECURE (because it's not just about
less now), and we automatically enable secure mode in certain cases, but not
otherwise.
This approach is more nuanced, but should provide a better experience for
users:
- Previusly we would set LESSSECURE=1 and trust the pager to make use of
it. But this has an effect only on less. We need to not start pagers which
are insecure when in secure mode. In particular more is like that and is a
very popular pager.
- We don't enable secure mode always, which means that those other pagers can
reasonably used.
- We do the right thing by default, but the user has ultimate control by
setting SYSTEMD_PAGERSECURE.
Fixes#5666.
v2:
- also check $PKEXEC_UID
v3:
- use 'sd_pid_get_owner_uid() != geteuid()' as the condition
Also, document this functionality more prominently, including with a
reference from sd_event_exit().
This is mostly to make things complete, as previously we supported NULL
callbacks only in _add_time() and _add_signal(). However, I think this
makes snese for IO event sources too (think: when some fd such as a pipe
end sees SIGHUP or so, exit), as well as defer or post event sources (i.e. exit
once we got nothing else to do). This also adds support for inotify
event sources, simply to complete things (I can't see the immediate use,
but maybe someone else comes up with it).
The only event source type that doesn't allow callback=NULL now are exit
callbacks, but for them they make little sense, as the event loop is
exiting then anyway.
Some extra safety when invoked via "sudo". With this we address a
genuine design flaw of sudo, and we shouldn't need to deal with this.
But it's still a good idea to disable this surface given how exotic it
is.
Prompted by #5666
Currently systemd-detect-virt fails to detect running under PowerVM.
Add code to detect PowerVM based on code in util-linux.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
We have three somewhat separate ideas: what the directory is for, what $TMPDIR is for, and security considerations.
Let's use paragraphs.
Also, conjunctions in titles aren't capitalized usually.
Let's explicitly deactivate all home dirs on shutdown, in order to
properly synchronizing unmounting and avoiding blocking devices.
Previously, we'd rely on automatic deactivation when home directories
become unused. However, that scheme is asynchronous, and ongoing
deactviations might conflicts with attempts to unmount /home. Let's fix
that by providing an explicit service systemd-homed-activate.service
whose only job is to have a ExecStop= line that explicitly deactivates
all home directories on shutdown. This service can the be ordered after
home.mount and similar, ensuring that we'll first deactivate all homes
before deactivating /home itself during shutdown.
This is kept separate from systemd-homed.service so that it is possible
to restart systemd-homed.service without deactivating all home
directories.
Fixes: #16842
We should avoid duplicating lengthy description of very similar concepts.
--root-hash-sig follows the same semantics as RootHashSig=, so just refer
the reader to the other man page. --root-hash doesn't implement the same
features as RootHash=, so we can't fully replace the description, but let's
give the user a hint to look at the other man page too.
For #17177.
Also, reword the description a bit. "As a string" is meaningless in the context
of commandline arguments, where evyrything is a string. This is not a
strongly-typed programming language where 5 is a number but "5" is something
completely different. Here both 5 and "5" are indistinguishable. The original
text was trying to say that a location name should be given and not a number,
so say "time zone location name".
For #17177.
In table titles, capitalize only the first word (they are rather long and
it is easier to read when it looks like a normal sentence).
Adjust some phrases to make them clearer when reported as unclear in #17177.
It can be one of "foreign", "missing", "stub", "static", "uplink",
depending on how /etc/resolv.conf is set up:
foreign → someone/something else manages /etc/resolv.conf,
systemd-resolved is just the consumer
missing → /etc/resolv.conf is missing altogether
stub/static/uplink → the file is managed by resolved, with the
well-known modes
Fixes: #17159
It always was the intention to expose this as trusted field _TID=, i.e.
automatically determine it from journald via some SCM_xyz field or so,
but this is never happened, and it's unlikely this will be added anytime
soon to the kernel either, hence let's just generate this sender side,
even if it means it's untrusted.
Adds support for LUKS detached header device on kernel
command line. It's introduced via extension to existing
luks.options 'header=' argument beyond colon (see examples
below). If LUKS header device is specified it's expected
to contain filesystem with LUKS header image on a path
specified in the first part of header specification.
The second parameter 'luks.data' specifies LUKS data device
supposed to be paired with detached LUKS header (note that
encrypted LUKS data device with detached header is unrecognisable
by standard blkid probe).
This adds support for LUKS encrypted rootfs partition with
detached header. It can also be used for initializing online LUKS2
encryption of data device.
Examples:
luks.data=<luks_uuid>=/dev/sdz
luks.data=<luks_uuid>=/dev/vg/lv
luks.data=<luks_uuid>=/dev/mapper/lv
luks.data=<luks_uuid>=PARTUUID=<part_uuid>
luks.data=<luks_uuid>=PARTLABEL=<part_uuid>
luks.options=<luks_uuid>=header=/header/path:UUID=<fs_uuid>
luks.options=<luks_uuid>=header=/header/path:PARTUUID=<part_uuid>
luks.options=<luks_uuid>=header=/header/path:PARTLABEL=<part_label>
luks.options=<luks_uuid>=header=/header/path:LABEL=<fs_label>
luks.options=<luks_uuid>=header=/header/path:/dev/sdx
luks.options=<luks_uuid>=header=/header/path:/dev/vg/lv
The '/header/path' is considered to be relative location within
filesystem residing on the header device specified beyond colon
character
The directory backend needs a file system path, and not a raw block
device. That's only supported for the LUKS2 backend.
Let's make this clearer in the man page and also generate a better error
message if attempted anyway.
Fixes: #17068
By default we'll run a container in --console=interactive and
--console=read-only mode depending if we are invoked on a tty or not so
that the container always gets a /dev/console allocated, i.e is always
suitable to run a full init system /as those typically expect a
/dev/console to exist).
With the new --console=autopipe mode we do something similar, but
slightly different: when not invoked on a tty we'll use --console=pipe.
This means, if you invoke some tool in a container with this you'll get
full inetractivity if you invoke it on a tty but things will also be
very nicely pipeable. OTOH you cannot invoke a full init system like
this, because you might or might not become a /dev/console this way...
Prompted-by: #17070
(I named this "autopipe" rather than "auto" or so, since the default
mode probably should be named "auto" one day if we add a name for it,
and this is so similar to "auto" except that it uses pipes in the
non-tty case).
