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Commit Graph

24 Commits

Author SHA1 Message Date
Tom Gundersen
4bd5ace3e7 units: networkd - order after udev
This way we are sure that /dev/net/tun has been given the right permissions before we try to connect to it.
Ideally, we should create tun/tap devices over netlink, and then this whole issue would go away.
2014-09-08 15:07:51 +02:00
Lennart Poettering
689d781b87 units: minor cleanups 2014-06-17 02:43:44 +02:00
Lennart Poettering
324d7a53b9 networkd: don't pull in systemd-networkd-wait-online service from systemd-networkd when enabling
networkd-wait-online should never exist in the default transaction,
unless explicitly enable or pulled in via things like NFS. However, just
enabling networkd shouldn't enable networkd-wait-online, since it's
common to use the former without the latter.
2014-06-17 02:43:44 +02:00
Lennart Poettering
ecde7065f7 units: rebuild /etc/passwd, the udev hwdb and the journal catalog files on boot
Only when necessary of course, nicely guarded with the new
ConditionNeedsUpdate= condition we added.
2014-06-13 13:26:32 +02:00
Lennart Poettering
a4a878d040 units: introduce network-pre.target as place to hook in firewalls
network-pre.target is a passive target that should be pulled in by
services that want to be executed before any network is configured (for
example: firewall scrips).

network-pre.target should be ordered before all network managemet
services (but not be pulled in by them).

network-pre.target should be order after all services that want to be
executed before any network is configured (and be pulled in by them).
2014-06-11 12:14:55 +02:00
Lennart Poettering
1b8689f949 core: rename ReadOnlySystem= to ProtectSystem= and add a third value for also mounting /etc read-only
Also, rename ProtectedHome= to ProtectHome=, to simplify things a bit.

With this in place we now have two neat options ProtectSystem= and
ProtectHome= for protecting the OS itself (and optionally its
configuration), and for protecting the user's data.
2014-06-04 18:12:55 +02:00
Lennart Poettering
417116f234 core: add new ReadOnlySystem= and ProtectedHome= settings for service units
ReadOnlySystem= uses fs namespaces to mount /usr and /boot read-only for
a service.

ProtectedHome= uses fs namespaces to mount /home and /run/user
inaccessible or read-only for a service.

This patch also enables these settings for all our long-running services.

Together they should be good building block for a minimal service
sandbox, removing the ability for services to modify the operating
system or access the user's private data.
2014-06-03 23:57:51 +02:00
Tom Gundersen
bddfc8afd3 networkd: drop CAP_SYS_MODULE
Rely on modules being built-in or autoloaded on-demand.

As networkd is a network facing service, we want to limits its capabilities,
as much as possible. Also, we may not have CAP_SYS_MODULE in a container,
and we want networkd to work the same there.

Module autoloading does not always work, but should be fixed by the kernel
patch f98f89a0104454f35a: 'net: tunnels - enable module autoloading', which
is currently in net-next and which people may consider backporting if they
want tunneling support without compiling in the modules.

Early adopters may also use a module-load.d snippet and order
systemd-modules-load.service before networkd to force the module
loading of tunneling modules.

This sholud fix the various build issues people have reported.
2014-06-03 00:40:23 +02:00
Lennart Poettering
d3cf48f4bd networkd: run as unpriviliged "systemd-network" user
This allows us to run networkd mostly unpriviliged with the exception of
CAP_NET_* and CAP_SYS_MODULE. I'd really like to get rid of the latter
though...
2014-06-01 09:12:00 +02:00
Lennart Poettering
40393d5247 units: remove CAP_SYS_PTRACE capability from hostnamed/networkd
The ptrace capability was only necessary to detect virtualizations
environments. Since we changed the logic to determine this to not
require priviliges, there's no need to carry the CAP_SYS_PTRACE
capability anymore.
2014-06-01 08:54:09 +02:00
Tom Gundersen
7da489e630 Revert "networkd: order after udev kernel socket"
This reverts commit a555350d47.

This did not fix the problem, just made it harder to hit.
2014-05-16 14:52:02 +02:00
Tom Gundersen
7c8ec321e7 networkd: unit - add cap to load modules
Remember to drop this when the kernel gains autoloading for all netdev kinds.
2014-05-12 17:37:52 +02:00
Tom Gundersen
3a67e927e3 networkd-wait-online: improve interoptability and enable by default
To make sure we don't delay boot on systems where (some) network links are managed by someone else
we don't block if something else has successfully brought up a link.

We will still block until all links we are aware of that are  managed by networkd have been
configured, but if no such links exist, and someone else have configured a link sufficiently
that it has a carrier, it may be that the link is ready so we should no longer block.

Note that in all likelyhood the link is not ready (no addresses/routes configured),
so whatever network managment daemon configured it should provide a similar wait-online
service to block network-online.target until it is ready.

The aim is to block as long as we know networking is not fully configured, but no longer. This
will allow systemd-networkd-wait-online.service to be enabled on any system, even if we don't
know whether networkd is the main/only network manager.

Even in the case networking is fully configured by networkd, the default behavior may not be
sufficient: if two links need to be configured, but the first is fully configured before the
second one appears we will assume the network is up. To work around that, we allow specifying
specific devices to wait for before considering the network up.

This unit is enabled by default, just like systemd-networkd, but will only be pulled in if
anyone pulls in network-online.target.
2014-04-24 00:23:07 +02:00
Tom Gundersen
a555350d47 networkd: order after udev kernel socket
Otherwise we will not be able to queuery whether devices are initialized on kdbus enabled systems.
2014-04-19 22:13:49 +02:00
Tom Gundersen
6c7c89dfc6 networkd: add CapabilityBoundingSet 2014-03-24 17:13:24 +01:00
Lennart Poettering
48791a98be units: networkd shouldn't have PrivateTmp= set, since it runs in early-boot
/tmp is only available in later boot, and we shouldn't create private
subdirs in it hence, while we are still in early boot.
2014-03-24 16:48:39 +01:00
Lennart Poettering
f21a71a907 core: enable PrivateNetwork= for a number of our long running services where this is useful 2014-03-19 23:25:28 +01:00
Jason A. Donenfeld
c4a0b20c7a install: do not statically enable systemd-networkd
[tomegun: pruned the commit message as not to contradict the follow-up commit]
2014-02-21 14:37:53 +01:00
Tom Gundersen
bcbca8291f networkd: don't hard depend on system bus
We may not have a dbus daemon in the initrd (until we can rely on kdbus). In
this case, simply ignore any attempts at using the bus. There is only one user
for now, but surely more to come.

In order to work reliably in the real root without kdbus, but at the same time
don't delay boot when kdbus is in use, order ourselves after dbus.service.
2014-01-18 01:56:41 +01:00
Tom Gundersen
1346b1f038 sd-dhcp-client/networkd: add transient hostname support 2014-01-16 20:32:08 +01:00
Lennart Poettering
74f9e0f203 units: run systemd-networkd.service only if CAP_NET_ADMIN capability is around
This has the effect that systemd-networkd won't run in containers
without network namespacing wher CAP_NET_ADMIN is (usually) not
available. It will still run in containers with network namespacing on
(where CAP_NET_ADMIN is usually avilable).

We might remove this condition check again if networkd provides services
to apps that also are useful in containers lacking network namespacing,
however, as long as it doesn't it should be handled like udevd and be
excluded in such containers.
2013-12-18 18:21:27 +01:00
Lennart Poettering
cde93897cd event: hook up sd-event with the service watchdog logic
Adds a new call sd_event_set_watchdog() that can be used to hook up the
event loop with the watchdog supervision logic of systemd. If enabled
and $WATCHDOG_USEC is set the event loop will ping the invoking systemd
daemon right after coming back from epoll_wait() but not more often than
$WATCHDOG_USEC/4. The epoll_wait() will sleep no longer than
$WATCHDOG_USEC/4*3, to make sure the service manager is called in time.

This means that setting WatchdogSec= in a .service file and calling
sd_event_set_watchdog() in your daemon is enough to hook it up with the
watchdog logic.
2013-12-11 18:20:09 +01:00
Tom Gundersen
4b6141c424 networkd: use Type=notify
Also start earlier during boot.
2013-11-23 02:07:08 +01:00
Tom Gundersen
f579559b3a networkd: add a basic network daemon
This daemon listens for and configures network devices tagged with
'systemd-networkd'. By default, no devices are tagged so this daemon
can safely run in parallel with existing network daemons/scripts.

Networks are configured in /etc/systemd/network/*.network. The first .network
file that matches a given link is applied. The matching logic is similar to
the one for .link files, but additionally supports matching on interface name.

The mid-term aim is to provide an alternative to ad-hoc scripts currently used
in initrd's and for wired setups that don't change much (e.g., as seen on
servers/and some embedded systems).

Currently, static addresses and a gateway can be configured.

Example .network file:

[Match]
Name=wlp2s0

[Network]
Description=My Network
Gateway=192.168.1.1
Address=192.168.1.23/24
Address=fe80::9aee:94ff:fe3f:c618/64
2013-11-09 23:41:17 +01:00