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Both plain opendir() and glob() will bump access time. Privileged
option O_NOATIME can be used to prevent the access time from being
updated. We already used it for subdirectories of the directories
which we were cleaning up. But for the directories specified directly
in the config files, we wouldn't do that. This means that,
paradoxically, our own temporary directories for PrivateTmp would stay
around forever, as long as one let systemd-tmpfiles-clean.service run
regularly, because they had their own glob patterns specified.
https://bugzilla.redhat.com/show_bug.cgi?id=1183684
This patch introduces ipv6 gre and gretap.
test:
ip6gre.netdev:
[NetDev]
Name=ip6gretap
Kind=ip6gretap
[Tunnel]
Local=2a00:ffde:4567:edde::4987
Remote=2001:473:fece:cafe::5179
ip6gre.network:
[Match]
Name=eno16777736
[Network]
Tunnel=ip6gretap
ip link
6: ip6gre@eno16777736: <POINTOPOINT,NOARP> mtu 1448 qdisc noop state
DOWN mode DEFAULT group default
link/gre6 2a:00:ff🇩🇪45:67:ed🇩🇪00:00:00:00:00:00:49:87 peer
20:01:04:73:fe:ce:ca:fe:00:00:00:00:00:00:51:79
For ACLs to be valid, a set of entries for user, group, and other
must be always present. Always add those entries.
While at it, only add the mask ACL if it is actually required, i.e.
when at least on ACL for non-owner group or user exists.
For types which adapt existing files it is generally more useful to accept
globs.
In analogy to z and Z, add recursive versions using uppercase letters.
Technically, making a accept globs is backwards incompatible, but in
practice it probably isn't yet widely used and we can assume that most
people don't create files with wildcards in names.
Functions which are used as callbacks, but not directly on items, are
renamed not to have "item_" prefix.
The data structure used by tmpfiles is changed: instead of hashmaps
mapping {path → Item*} we now have hashmaps containing
{path -> ItemArray}, where ItemArray contains a pointer
to an array of Items.
For current code it doesn't matter much, but when we add new types it
is easier to simply add a new Item for a given path, then to coalesce
multiple lines into one Item.
In the future, this change will also make it possible to remember the
file and line where each Item originates, and use that in reporting
errors. Currently this is not possible, since each Item can be created
from multiple lines.
Given that this is also the place to store raw disk images which are
very much bootable with qemu/kvm it sounds like a misnomer to call the
directory "container". Hence, let's change this sooner rather than
later, and use the generic name, in particular since we otherwise try to
use the generic "machine" preferably over the more specific "container"
or "vm".
This introduces am AddressFamilyBoolean type that works more or less
like a booleaan, but can optionally turn on/off things for ipv4 and ipv6
independently. THis also ports the DHCP field over to it.
Now that networkd's IP masquerading support means that running
containers with "--network-veth" will provide network access out of the
box for the container, let's add a shortcut "-n" for it, to make it
easily accessible.
This adds two new settings to networkd's .network files:
IPForwarding=yes and IPMasquerade=yes. The former controls the
"forwarding" sysctl setting of the interface, thus controlling whether
IP forwarding shall be enabled on the specific interface. The latter
controls whether a firewall rule shall be installed that exposes traffic
coming from the interface as coming from the local host to all other
interfaces.
This also enables both options by default for container network
interfaces, thus making "systemd-nspawn --network-veth" have network
connectivity out of the box.
This turns "lock-session", "activate", "unlock-session",
"enable-linger", "disable-linger" into commands that take no argument,
optionally in which case the callers session/user is implied.
