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The 'drivers' pseudo-subsystem needs special treatment. These pseudo-devices are
found under /sys/bus/drivers/, so needs the real subsystem encoded
in the device_id in order to be resolved.
The reader side already assumed this to be the case.
Let's allow distros to change the support URL to expose in catalog entries by
default. It doesn't make sense to direct end-users to the upstream project for
common errors.
This adds a --with-support-url= switch to configure, which allows overriding
the default at build-time.
Fixes: #2516
My educated guess is that #3561 was filed due to confusion around the
systemd-resolve "Data Authenticated:" output. Let's try to clean up the
confusion a bit, and document what it means in the man page.
Link as many binaries as possible with it, to save storage space.
Preserve the static libshared and libbasic for use in libraries, nss
modules and udev.
Libraries need to be static in order to avoid polluting the symbol
namespace.
Udev needs to be static so downstream can avoid strict version dependencies
with the systemd package, and this can complicate upgrade scenarios.
Let's follow the same logic for all mounts here: log errors, and exit the
process uncleanly ultimately, but do not skip further mounts if we encounter a
problem with an earlier one.
Fixes: #2344
We have to check for OOM here, let's add that. There's really no point in
checking for path_is_absolute() on the result however, as there's no particular
reason why that should be refused. Also, we don't have similar checks for the
other mount devices the generator deals with, hence don't bother with it here
either. Let's remove that check.
(And it shouldn't return made-up errors like "-1" in this case anyway.)
If run_qemu() exits with non-zero, this either meant that QEMU was not
available (which should be a SKIP) or that QEMU timed out if $QEMU_TIMEOUT was
set (which then should be a FAIL).
Limit the exit code of run_qemu() to QEMU availability only, and track timeouts
separately through the new $TIMED_OUT variable, which is then checked in
check_result_qemu().
Do the same for $NSPAWN_TIMEOUT and run_nspawn() so that nspawn and QEMU work
similarly.
This is a follow-up to 5d2036b5f3, and also makes
the "machinectl clean" verb asynchronous, after all it's little more than a
series of image removals.
The changes required to make this happen are a bit more comprehensive as we
need to pass information about deleted images back to the client, as well as
information about the image we failed on if we failed on one. Hence, create a
temporary file in /tmp, serialize that data into, and read it from the parent
after the operation is complete.
There's no point in explicitly closing the errno pipe, if we exit right after
anyway. It doesn't hurt doing this either, but let's do this the same way for
all cases where we use the "Operation" object right now, and in all other cases
we do not close the pipe explicitly, hence don't do so here either.
The result of check_nspawn does not mean much, and this forgot to ask
check_nspawn() whether nspawn can be used at all. This brings
TEST-12-ISSUE-3171 in line with other nspawn tests.
In some cases, caching DNS results locally is not desirable, a it makes DNS
cache poisoning attacks a tad easier and also allows users on the system to
determine whether or not a particular domain got visited by another user. Thus
provide a new "Cache" resolved.conf option to disable it.
Some upstream DNS servers return SERVFAIL if we ask them for DNSSEC RRs, which
some forwarding DNS servers pass on to us as SERVFAIL (other though as
NOERROR...). This is should not be considered a problem, as long as the domain
in question didn't have DNSSEC enabled. Hence: when making use of auxiliary
transactions accept those that return SERVFAIL.
There might be two reasons why we get a SERVFAIL response from our selected DNS
server: because this DNS server itself is bad, or because the DNS server
actually serving the zone upstream is bad. So far we immediately downgraded our
server feature level when getting SERVFAIL, under the assumption that the first
case is the only possible case. However, this meant we'd downgrade immediately
even if we encountered the second case described above.
With this commit handling of SERVFAIL is reworked. As soon as we get a SERVFAIL
on a transaction we retry the transaction with a lower feature level, without
changing the feature level tracked for the DNS server itself. If that fails
too, we downgrade further, and so on. If during this downgrading the SERVFAIL
goes away we assume that the DNS server we are talking to is bad, but the zone
is fine and propagate the detected feature level to the information we track
about the DNS server. Should the SERVFAIL not go away this way we let the
transaction fail and accept the SERVFAIL.
udevd already limits its number of workers/children: the max number is actually
twice the number of CPUs the system is using.
(The limit can also be raised with udev.children-max= kernel command line
option BTW).
On some servers, this limit can easily exceed the maximum number of tasks that
systemd put on all services, which is 512 by default.
Since udevd has already its limitation logic, simply disable the static
limitation done by TasksMax.
root=/dev/nfs is a legacy option for the kernel to handle root on NFS.
Documentation for this kernel command line option
can be found in the kernel source tree:
Documentation/filesystems/nfs/nfsroot.txt
It makes use of the sd_listen_fds() call, and as such should live in
src/shared, as the distinction between src/basic and src/shared is that the
latter may use libsystemd APIs, the former does not.
Note that btrfs-util.[ch] and log.[ch] also include header files from
libsystemd, but they only need definitions, they do not invoke any function
from it. Hence they may stay in src/basic.
