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network: default RequiredForOnline=false if ActivactionPolicy= not set to up

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If ActivationPolicy= is set to down, always-down, or manual, then any
matching link will delay boot (due to delaying network-online.target).

If RequiredForOnline= wasn't explicitly set, then default it to false
if ActivationPolicy= is down or manual. If ActivationPolicy=always-down,
then force RequiredForOnline=no.
This commit is contained in:
Dan Streetman 2021-06-08 12:01:31 -04:00
parent b80ef40caf
commit 7c644a6966
3 changed files with 32 additions and 7 deletions
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18
man/systemd.network.xml
View file

@ -220,11 +220,16 @@
<command>systemd-networkd-wait-online</command>). When <literal>no</literal>, the network is ignored
when determining the online state. When a minimum operational state and an optional maximum operational
state are set, <literal>yes</literal> is implied, and this controls the minimum and maximum
operational state required for the network interface to be considered online.
Defaults to <literal>yes</literal>.</para>
operational state required for the network interface to be considered online.</para>
<para>The network will be brought up normally in all cases, but in
the event that there is no address being assigned by DHCP or the
<para>Defaults to <literal>yes</literal> when <varname>ActivationPolicy=</varname> is not set,
or set to <literal>up</literal>, <literal>always-up</literal>, or <literal>bound</literal>.
Defaults to <literal>no</literal> when <varname>ActivationPolicy=</varname> is set to
<literal>manual</literal> or <literal>down</literal>. This is forced to <literal>no</literal>
when <varname>ActivationPolicy=</varname> is set to <literal>always-down</literal>.</para>
<para>The network will be brought up normally (as configured by <varname>ActivationPolicy=</varname>),
but in the event that there is no address being assigned by DHCP or the
cable is not plugged in, the link will simply remain offline and be
skipped automatically by <command>systemd-networkd-wait-online</command>
if <literal>RequiredForOnline=no</literal>.</para>
@ -265,6 +270,11 @@
the administrative state. When <varname>BindCarrier=</varname> is also set, this is
automatically set to <literal>bound</literal> and any other value is ignored.</para>
<para>When the policy is set to <literal>down</literal> or <literal>manual</literal>,
the default value of <varname>RequiredForOnline=</varname> is <literal>no</literal>.
When the policy is set to <literal>always-down</literal>, the value of
<varname>RequiredForOnline=</varname> forced to <literal>no</literal>.</para>
<para>The administrative state is not the same as the carrier state, so using
<literal>always-up</literal> does not mean the link will never lose carrier. The link
carrier depends on both the administrative state as well as the network device's physical

19
src/network/networkd-network.c
View file

@ -229,6 +229,21 @@ int network_verify(Network *network) {
if (network->ignore_carrier_loss < 0)
network->ignore_carrier_loss = network->configure_without_carrier;
if (IN_SET(network->activation_policy, ACTIVATION_POLICY_DOWN, ACTIVATION_POLICY_ALWAYS_DOWN, ACTIVATION_POLICY_MANUAL)) {
if (network->required_for_online < 0 ||
(network->required_for_online == true && network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN)) {
log_debug("%s: Setting RequiredForOnline=no because ActivationPolicy=%s.", network->filename,
activation_policy_to_string(network->activation_policy));
network->required_for_online = false;
} else if (network->required_for_online == true)
log_warning("%s: RequiredForOnline=yes and ActivationPolicy=%s, "
"this may cause a delay at boot.", network->filename,
activation_policy_to_string(network->activation_policy));
}
if (network->required_for_online < 0)
network->required_for_online = true;
if (network->keep_configuration < 0)
network->keep_configuration = KEEP_CONFIGURATION_NO;
@ -303,7 +318,7 @@ int network_load_one(Manager *manager, OrderedHashmap **networks, const char *fi
.manager = manager,
.n_ref = 1,
.required_for_online = true,
.required_for_online = -1,
.required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT,
.activation_policy = _ACTIVATION_POLICY_INVALID,
.arp = -1,
@ -1108,7 +1123,7 @@ int config_parse_required_for_online(
assert(network);
if (isempty(rvalue)) {
network->required_for_online = true;
network->required_for_online = -1;
network->required_operstate_for_online = LINK_OPERSTATE_RANGE_DEFAULT;
return 0;
}

2
src/network/networkd-network.h
View file

@ -102,7 +102,7 @@ struct Network {
int allmulticast;
int promiscuous;
bool unmanaged;
bool required_for_online; /* Is this network required to be considered online? */
int required_for_online; /* Is this network required to be considered online? */
LinkOperationalStateRange required_operstate_for_online;
AddressFamily required_family_for_online;
ActivationPolicy activation_policy;