Add test case for calling siphash24 with unaligned input pointers, as we
commonly get with calling it on the result on basename() or similar.
This provides a test for PR #1916, rescued from the superseded PR #1911.
Thanks to Steve Langasek for the test!
If we requeue jobs, we are no longer interested in old jobs. Hence, we
better ignore any JobRemoved signals for old jobs and concentrate on our
replacements.
When queuing unit jobs, we should rather replace existing units than
fail. This is especially important when we queued a user-shutdown and a
new login is encountered. In this case, we better raplce the shutdown
jobs. systemd takes care of everything else.
If the last reference to a user is released, we queue stop-jobs for the
user-service and slice. Only once those are finished, we drop the
user-object. However, if a new session is opened before the user object is
fully dropped, we currently incorrectly re-use the object. This has the
effect, that we get stale sessions without a valid "systemd --user"
instance.
Fix this by properly allowing user_start() to be called, even if
user->stopping is true.
Just like user->slice, there is no reason to store the unit name in /run,
nor should we allocate it dynamically on job instantiation/removal. Just
keep it statically around at all times and rely on user->started ||
user->stopping to figure out whether the unit exists or not.
Few changes to user_new() and user_free():
- Use _cleanup_(user_freep) in constructor
- return 'int' from user_new()
- make user_free() deal with partially initialized objects
- keep reverse-order in user_free() compared to user_new()
- make user_free() return NULL
- make user_free() accept NULL as no-op
Currently, we allocate user->slice when starting a slice, but we never
release it. This is incompatible if we want to re-use a user object once
it was stopped. Hence, make sure user->slice is allocated statically on
the user object and use "u->started || u->stopping" as an indication
whether the slice is actually available on pid1 or not.
Lets not pretend we support changing XDG_RUNTIME_DIR via logind state
files. There is no reason to ever write the string into /run, as we
allocate it statically based on the UID, anyway. Lets stop that and just
allocate the runtime_path in "struct User" at all times.
We keep writing it into the /run state to make sure pam_systemd of
previous installs can still read it. However, pam_systemd is now fixed to
allocate it statically as well, so we can safely remove that some time in
the future.
Last but not least: If software depends on systemd, they're more than free
to assume /run/user/$uid is their runtime dir. Lets not require sane
applications to query the environment to get their runtime dir. As long as
applications know their login-UID, they should be safe to deduce the
runtime dir.
It's not a good idea to create subvolumes for parts of the OS tree (such
as /home, or /var) if the root directory is not a subvolume too. We
shouldn't assume control of "heavier" objects such as subvolumes, if the
originating object (the root directory) is a "light-weight" object, i.e.
a plain directory.
Effectively this means that chroot() environments that are run on a
plain directory do not have to deal with problems around systemd
creating subvolumes that cannot be removed with a simple "rm" anymore.
However, if the chroot manager creates a proper subvolume for such an
environment it will also get further subvolumes placed in there, under
the assumption that the manager understands the concept of subvolumes in
that case.
Change the "out" parameter from uint8_t[8] to uint64_t. On architectures which
enforce pointer alignment this fixes crashes when we previously cast an
unaligned array to uint64_t*, and on others this should at least improve
performance as the compiler now aligns these properly.
This also simplifies the code in most cases by getting rid of typecasts. The
only place which we can't change is struct duid's en.id, as that is _packed_
and public API, so we can't enforce alignment of the "id" field and have to
use memcpy instead.
src/basic/virt.c: In function 'detect_vm_device_tree':
src/basic/virt.c:117:17: error: unknown type name '_cleanup_closedir_'
_cleanup_closedir_ DIR *dir = NULL;
src/basic/virt.c:128:17: error: implicit declaration of function 'FOREACH_DIRENT' [-Werror=implicit-function-declaration]
FOREACH_DIRENT(dent, dir, return -errno)
This new setting configures the TasksMax= field for the slice objects we
create for each user.
This alters logind to create the slice unit as transient unit explicitly
instead of relying on implicit generation of slice units by simply
starting them. This also enables us to set a friendly description for
slice units that way.
nginx defines an uppercase "M" that way (in contrast to the lowercase
"m" for "minute"), and it sounds like an OK logic to follow, so that we
understand a true superset of time values nginx understands.
http://nginx.org/en/docs/syntax.html
When deserializing we can now have an attached network without the various clients yet
having been configured. Hence, don't misused the link->network as a check to determine
if a link is ready to be used, but check the state explicitly.
As it turns out the kernel does not support per-interface IPv6 packet
forwarding controls (unlike as it does for IPv4), but only supports a
global option (#1597). Also, the current per-interface management of the
setting isn't really useful, as you want it to propagate to at least one
more interface than the one you configure it on. This created much grief
(#1411, #1808).
Hence, let's roll this logic back and simplify this again, so that we
can expose the same behaviour on IPv4 and IPv6 and things start to work
automatically again for most folks: if a network with this setting set
is set up we propagate the setting into the global setting, but this is
strictly one-way: we never reset it again, and we do nothing for network
interfaces where this setting is not enabled.
Fixes: #1808, #1597.
Move check whether ipv6 is available into link_ipv6_privacy_extensions()
to keep it as internal and early as possible.
Always check if there's a network attached to a link before we apply
sysctls. We do this for most of the sysctl functions already, with this
change we do it for all.
