Currently resolving mDNS requests doesn't work because in
dns_transaction_process_reply() no answer gets installed into
mDNS transactions.
When receiving a mDNS reply we should not check for query section
equivalence of the request and its corresponsing response. But still
we need to install answers to mDNS transactions to make it possible
to actually resolve mDNS requests.
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov@linux.intel.com>
This substantially reworks the seccomp code, to ensure better
compatibility with some architectures, including i386.
So far we relied on libseccomp's internal handling of the multiple
syscall ABIs supported on Linux. This is problematic however, as it does
not define clear semantics if an ABI is not able to support specific
seccomp rules we install.
This rework hence changes a couple of things:
- We no longer use seccomp_rule_add(), but only
seccomp_rule_add_exact(), and fail the installation of a filter if the
architecture doesn't support it.
- We no longer rely on adding multiple syscall architectures to a single filter,
but instead install a separate filter for each syscall architecture
supported. This way, we can install a strict filter for x86-64, while
permitting a less strict filter for i386.
- All high-level filter additions are now moved from execute.c to
seccomp-util.c, so that we can test them independently of the service
execution logic.
- Tests have been added for all types of our seccomp filters.
- SystemCallFilters= and SystemCallArchitectures= are now implemented in
independent filters and installation logic, as they semantically are
very much independent of each other.
Fixes: #4575
When a new entry appears in /proc/self/mountinfo, mount_setup_unit()
allocated a new mount unit for it and starts initializing it.
mount_setup_unit() is also used to update a mount unit when a change happens in
/proc/self/mountinfo, for example a mountpoint can be remounted with additional
mount options.
This patch introduces 2 separate functions to deal with those 2 cases instead
of mount_setup_unit() dealing with both of them. The common code is small and
doing the split makes the code easier to read and less error prone if extended
later.
It also makes sure to initialize in both functions the mount parameters of the
mount unit before calling mount_is_extrinsic() since this function relies on
them.
Fixes: #4902
RDNSS and DNSLL options received in RA are always used, possibly breaking the resolution of private domains hosted on a local DNS server. When setting UseDNS=no in a [IPv6AcceptRA] section of a .network file, both RDNSS and DNSLL options in received RA should be ignored.
Fixes: #5040
The parameters were calculated on my X1 Yoga using touchpad-edge-detector; As as the device name indicates, the Touchpad is exactly the same as the X1 Carbon 4th gen.
A fixed value (6 and later 5) was added back in 4deb3b9391, and
not updated when load_len was added later on.
Also the other 5 with 1 + 1 + 1 + 1 + 1 to make it easier to see
that this is about the column separators.
After parsing the --verify-key argument, overwrite it with null bytes.
This minimizes (but does not completely eliminate) the time frame within
which another process on the system can extract the verification key
from the journalctl command line.
- Show example of all `systemctl status` output and documents what possible
"Loaded:", "Active" and "Enabled" values mean.
- Documents what different colors of the dot mean.
- Documents "gotcha" with load-on-demand behavior which will report units as
"loaded" even if they are only loaded to show their status.
(From @poettering: https://github.com/systemd/systemd/issues/5063#issuecomment-272115024 )
If we are running in a chroot/container/..., we would print a useless warning about
not being able to communicate with systemd. Trying to do daemon-reload is pointless
in those cases, so let's just skip all actions in that case.
The check uses /run/system/system, as recommended by sd_booted(3).
https://bugzilla.redhat.com/show_bug.cgi?id=1411299
When a unit is part of several dependency constraints of another
unit, list-dependencies repeats the name of the dependency for each
dep constraint the unit is encountered.
For example:
$ systemctl cat test-main.target
# /etc/systemd/system/test-main.target
[Unit]
Description=Main Target
$ systemctl cat test.target
[Unit]
Description=Sub target
PartOf=test-main.target
[Install]
WantedBy=test-main.target
$ systemctl enable test.target
Created symlink from /etc/systemd/system/test-main.target.wants/test.target to /etc/systemd/system/test.target.
$ systemctl show test-main.target | grep test.target
Wants=test.target
ConsistsOf=test.target
[...]
$ systemctl list-dependencies test-main.target
test-main.target
● ├─test.target
● └─test.target
With this patch applied, dependencies are shown only once.
In eb64b435eb ActiveSlave/PrimarySlave were inserted in between
IPv6AcceptRA and IPv6AcceptRouterAdvertisements and the comment then didn't
make sense. It turns out that gperf does not understand C-style comments, and
that there's no comment syntax in the keywords section. The following was
generated:
{"/* legacy alias for the above */"},
{"Network.IPv6AcceptRA", config_parse_tristate, 0, offsetof(Network, ipv6_accept_ra)},
In practice this wouldn't lead to problems because this fake pattern would be
hard to match, but it seems better to remove the comments altogether.
Readers of the .gperf file will have to look for the repeated output field to
notice legacy options. To make this easier, let's always keep the legacy option
second.
bash implements process substitution using /dev/fd/N (this is documented
in man bash). We'd like kernel-install to work in chrooted RPM
scriptlets without /dev.
We can use here-strings instead. bash uses temporary files to implement
those.
When a user is trying to understand what is going on with a restart action, it is useful to explicitly describe how the action is run. It may seem obvious, but it is helpful to be explicit so one knows there isn't a special ExecRestart= or similar option that they could be looking at.
It also used __bitwise and __force. It seems easier to rename
our versions since they are local to this one single header.
Also, undefine them afteerwards, so that we don't pollute the
preprocessor macro namespace.
Accept AF_VSOCK listen addresses in socket unit files. Both guest and
host can now take advantage of socket activation.
The QEMU guest agent has recently been modified to support socket
activation and can run over AF_VSOCK with this patch.
The AF_VSOCK address family facilitates guest<->host communication on
VMware and KVM (virtio-vsock). Adding support to systemd allows guest
agents to be launched through .socket unit files. Today guest agents
are stand-alone daemons running inside guests that do not take advantage
of systemd socket activation.
sockaddr_port() either returns a >= 0 port number or a negative errno.
This works for AF_INET and AF_INET6 because port ranges are only 16-bit.
In AF_VSOCK ports are 32-bit so an int cannot represent all port number
and negative errnos. Separate the port and the return code.
Ubuntu 14.04 (Trusty) kernel header packages ship without
<linux/vm_sockets.h>. Only struct sockaddr_vm and VMADDR_CID_ANY will
be needed by systemd and they are simple enough to go in missing.h.
CentOS 7 <sys/socket.h> does not define AF_VSOCK. Define it so the code
can compile although actual socket(2) calls may fail at runtime if the
address family isn't available.
device_setup_unit() might be called (when an event happened in
/proc/self/mountinfo for example) with a null 'dev' parameter. This
indicates that the device has been unplugged but the corresponding
mountpoint is still visible in /proc/self/mountinfo.
This patch makes sure we don't call device_is_bound_by_mounts() in
this case.
Fixes: #5025
