This new setting can be used to specify mount options that shall only be
added to the mount option string if the kernel supports them.
This shall be used for adding "usrquota" to tmp.mount without breaking compat,
but is generally be useful.
This implements one idea from #34988: default to "user-light" and
"background-light" for system users, so that the service manager is only
pulled in for sessions that likely need them, i.e. not cron jobs or ftp
logins.
This is a compat break to some degree, but I think a worthy one. I
updated the NEWS file to explain this.
Fixes the following error:
```
../src/basic/random-util.c: In function "fallback_random_bytes":
../src/basic/random-util.c:45:26: error: initializer-string for array of "char" is too long [-Werror=unterminated-string-initialization]
45 | .label = "systemd fallback random bytes v1",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
```
This adds a new --lightweight=yes/no switch which allows controlling
whether the invoked service will have the service manager around or not.
Moreover, this changes that if the target user is root it will now
support to the lightweight mode, i.e. run0 towards root will no longer
pull in the service manager (a real tty login via getty still will
though!).
My thinking here is that quickly raising privileges via run0 probably
shouldn't be considered a proper login but just something short lived,
temporary for a single command or similar.
Let's make sure systemd-run itself works nicely as a service that tells
the caller when it is ready.
Note that we don't fire the same message in scope mode, since in that
case want to leave sd_notify() handling to the invoked process.
This new session class is to "user" what "background" is to
"background-light": it doesn't cause the per-user service manager to
start.
This new session class is now the default if no session class was
provided at session registration time and the following conditions hold:
1. The session is not graphical
2. The user is not a regular user (but not root)
Or in other words root and system users won't get a service manager
started automatically if they go through a PAM session as part of things
like cron or ftp. They will however still get one if they log in
graphically.
This changes behaviour a bit, but hopefully in OK was.
This also makes "background-light" for system users incl. root.
This addresses one of the ideas discussed in #34988.
This makes things a bit faster (because it cuts down a bit on
roundtrips) and prepares ground so that one day we can let logind run in
earlier boot already, making it a bit less special.
communication between logind and pid1 is still dbus only, hence there's
a lot of room for further improvement I guess.
Unfortunately kernel reports EOF if there's an inconsistency between efivarfs var list
and what's actually stored in firmware, c.f. #34304. A zero size env var is not allowed in
efi and hence the variable doesn't really exist in the backing store as long as it is zero
sized, and the kernel calls this "uncommitted". Hence we translate EOF back to ENOENT here,
as with kernel behavior before
https://github.com/torvalds/linux/commit/3fab70c165795431f00ddf9be8b84ddd07bd1f8f
If the kernel changes behaviour (to flush dentries on resume), we can drop
this at some point in the future. But note that the commit is 11
years old at this point so we'll need to deal with the current behaviour for
a long time.
Fix#34304.
This PR introduces io.systemd.MachineImage.SetPoolLimit method which is
alternative to DBus's SetPoolLimit.
This is last function for org.freedesktop.machine1 Dbus interface
This makes sure we now use Varlink per default as transport for
allocating sessions.
This reduces the time it takes to do one run0 cycle by roughly ~10% on my
completely synthetic test setup (assuming the target user's service
manager is already started)
The D-Bus codepaths are kept in place for two reasons:
* To make upgrades easy
* If the user actually sets resource properties on the PAM session we
fall back to the D-Bus codepaths, as we currently have no way to
encode the scope properties in JSON, this is only supported for D-Bus
serialization.
The latter should be revisited once it is possible to allocate a scope
unit from PID1 via varlink.
in strv_new() we have STRV_IGNORE for skipping over an argument in the
argument list. Let's add the same to strextend_with_separator():
strextend_with_separator(&x, "foo", POINTER_MAX, "bar");
will result in "foobar" being appended to "x". (POINTER_MAX Which is
different from NULL, which terminates the argument list).
This is useful for ternary op situations.
(We should probably get rid of STRV_IGNORE and just use POINTER_MAX
everywhere directly, but that's for another time.)
The functions are very similar, let's make them the same. If the first
argument to strextend() is NULL instead of extending a string we'll
allocate a fresh one and return that.
We were missing one service result (oom-kill), and the ratelimit one is
called differently. Correct that so that we generate proper log messages
for these cases.
Background: Fedora/RHEL are switching to sysusers.d metadata for
creation of users and groups for system users defined by packages
(https://fedoraproject.org/wiki/Changes/RPMSuportForSystemdSysusers).
Packages carry sysusers files. During package installation, rpm calls an
program to execute on this config. This program may either be
/usr/lib/rpm/sysusers.sh which calls useradd/groupadd, or
/usr/bin/systemd-sysusers. To match the functionality provided by
useradd/groupadd from the shadow-utils project, systemd-sysusers must
emit audit events so that it provides a drop-in replacement.
systemd-sysuers will emit audit events AUDIT_ADD_USER/AUDIT_ADD_GROUP
when adding users and groups. The operation "names" are copied from
shadow-utils, so the format of the events that is generated on success
should be identical. On failure, things are more complicated. We write
the whole file at once, once, so we first generate "success" messages
for each entry, then we try to write the files, and if things fail, we
generate failure messages to all entries that we failed to write.
Background: Fedora/RHEL are switching to sysusers.d metadata for creation of
users and groups for system users defined by packages
(https://fedoraproject.org/wiki/Changes/RPMSuportForSystemdSysusers).
Packages carry sysusers files. During package installation, rpm calls an
program to execute on this config. This program may either be
/usr/lib/rpm/sysusers.sh which calls useradd/groupadd, or
/usr/bin/systemd-sysusers. To match the functionality provided by
useradd/groupadd from the shadow-utils project, systemd-sysusers must emit
audit events so that it provides a drop-in replacement.
systemd-sysuers will emit audit events AUDIT_ADD_USER/AUDIT_ADD_GROUP when
adding users and groups. The operation "names" are copied from shadow-utils in
Fedora (which has a patch to change them from the upstream version), so the
format of the events that is generated on success should be identical.
The helper code is shared between sysusers and utmp-wtmp. I changed the
audit_fd variable to be unconditional. This way we can avoid ugly iffdefery
every time the variable would be used. The cost is that 4 bytes of unused
storage might be present. This is negligible, and the compiler might even be
able to optimize that away if it inlines things.
The arm confidential compute architecture (CCA) provides a platform design for
confidential VMs running in a new realm context.
This can be detected by the existence of a platform device exported for the
arm-cca-guest driver, which provides attestation services via the realm
services interface (RSI) to the Realm Management Monitor (RMM).
Like the other methods systemd uses to detect Confidential VM's, checking
the sysfs entry suggests that this is a confidential VM and should only be
used for informative purposes, or to trigger further attestation.
Like the s390 detection logic, the sysfs path being checked is not labeled
as ABI, and may change in the future. It was chosen because its
directly tied to the kernel's detection of the realm service interface rather
to the Trusted Security Module (TSM) which is what is being triggered by the
device entry. The TSM module has a provider string of 'arm-cca-guest' which
could also be used, but that (IMHO) doesn't currently provide any additional
benefit except that it can fail of the module isn't loaded.
More information can be found here:
https://developer.arm.com/documentation/den0125/0300
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
When udev rules are being tested, log level specified by SYSTEMD_LOG_LEVEL=
environment variable should be honored, and should not be overridden by
the rules.
When copying a directory from or to an image, let's always merge
with existing directories instead of failing with "File Exists".
Fixes https://github.com/systemd/mkosi/issues/3342.
In containers securityfs is typically not mounted. Our lsm-bpf code
so far detected this situation and claimed the kernel was lacking
lsm-bpf support. Which isn't quite true though, it might very well
support it. This made boots of systemd in systemd-nspawn a bit ugly,
because of the misleading log message at boot.
Let's improve things, and make clearer what is going on.
Lennart Poettering
Yu Watanabe
jane400
wrvsrx
Ivan Kruglov
Daan De Meyer
Luca Boccassi
Zbigniew Jędrzejewski-Szmek
Jeremy Linton
Sea-Eun Lee
Mike Yuan
Aman Verma