networkd: Allow to retain configs even if carrier is lost

Closes #9111
systemd · Jun 1, 2018 · a9cc018 · a9cc018
1 parent 33de6b5
commit a9cc018
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Showing 4 changed files with 12 additions and 1 deletion.
diff --git a/man/systemd.network.xml b/man/systemd.network.xml
@@ -772,6 +772,15 @@
           </para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term><varname>IgnoreCarrierLoss=</varname></term>
+        <listitem>
+          <para>A boolean. Allows networkd to retain the configure even if no carrier.
+          Defaults to false.
+          </para>
+        </listitem>
+      </varlistentry>
+
       </variablelist>
 
   </refsect1>

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
@@ -3157,7 +3157,7 @@ static int link_carrier_lost(Link *link) {
         /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
            setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
            configuration and stop the clients as well. */
-        if (link->setting_mtu)
+        if (link->setting_mtu || link->network->ignore_carrier_loss)
                 return 0;
 
         r = link_stop_clients(link);

diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
@@ -78,6 +78,7 @@ Network.ProxyARP,                       config_parse_tristate,
 Network.IPv6ProxyNDPAddress,            config_parse_ipv6_proxy_ndp_address,            0,                             0
 Network.BindCarrier,                    config_parse_strv,                              0,                             offsetof(Network, bind_carrier)
 Network.ConfigureWithoutCarrier,        config_parse_bool,                              0,                             offsetof(Network, configure_without_carrier)
+Network.IgnoreCarrierLoss,              config_parse_bool,                              0,                             offsetof(Network, ignore_carrier_loss)
 Address.Address,                        config_parse_address,                           0,                             0
 Address.Peer,                           config_parse_address,                           0,                             0
 Address.Broadcast,                      config_parse_broadcast,                         0,                             0

diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
@@ -216,6 +216,7 @@ struct Network {
         int multicast;
         bool unmanaged;
         bool configure_without_carrier;
+        bool ignore_carrier_loss;
         uint32_t iaid;
         DUID duid;