config: make "ignore-carrier" a per-device configuration option

NetworkManager.conf already contains several per-device settings,
that is, settings that have a device-spec as argument.

   main.ignore-carrier
   main.no-auto-default
   main.assume-ipv6ll-only
   keyfile.unmanged-devices

Optimally, these settings should be moved to the new [device*]
section.

For now, only move main.ignore-carrier there. For the others
it may not make sense to do so:

- main.no-auto-default: is already merged with internal state
  from /var/lib/NetworkManager/no-auto-default.state. While
  NMConfig's write API would be fine to also persist and merge
  the no-auto-default setting, we'd still have to read the old
  file too. Thus, deprecating this setting gets quite cumbersome
  to still handle the old state file.
  Also, it seems a less useful setting to configure in the
  global configuration aside setting main.no-auto-default=*.

- main.assume-ipv6ll-only: one day, I hope that we no longer
  assume connections at all, and this setting becomes entirely
  obsolete.

- keyfile.unmanged-devices: this sets NM_UNMANAGED_USER_SETTINGS,
  which cannot be overruled via D-Bus. For a future device.managed
  setting we want it it to be overwritable via D-Bus by an explicit
  user action. Thus, a device.managed property should have a different
  semantic, this should be more like a device.unmanaged-force setting,
  which could be done.

man/NetworkManager.conf.xml

@@ -224,30 +224,12 @@ no-auto-default=*
         <term><varname>ignore-carrier</varname></term>
         <listitem>
           <para>
-            Specify devices for which NetworkManager will (partially)
-            ignore the carrier state. Normally, for
-            device types that support carrier-detect, such as Ethernet
-            and InfiniBand, NetworkManager will only allow a
-            connection to be activated on the device if carrier is
-            present (ie, a cable is plugged in), and it will
-            deactivate the device if carrier drops for more than a few
-            seconds.
-          </para>
-          <para>
-            Listing a device here will allow activating connections on
-            that device even when it does not have carrier, provided
-            that the connection uses only statically-configured IP
-            addresses. Additionally, it will allow any active
-            connection (whether static or dynamic) to remain active on
-            the device when carrier is lost.
-          </para>
-          <para>
-            Note that the "carrier" property of NMDevices and device D-Bus
-            interfaces will still reflect the actual device state; it's just
-            that NetworkManager will not make use of that information.
-          </para>
-          <para>See <xref linkend="device-spec"/> for the syntax how to
-           specify a device.
+            This setting is deprecated for the per-device setting
+            <literal>ignore-carrier</literal> which overwrites this setting
+            if specified (See <xref linked="ignore-carrier"/>).
+            Otherwise, it is a list of matches to specify for which device
+            carrier should be ignored. See <xref linkend="device-spec"/> for the
+            syntax how to specify a device.
           </para>
         </listitem>
       </varlistentry>
@@ -713,6 +695,38 @@ unmanaged=1
     <para>
       The following properties can be configured per-device.
       <variablelist>
+        <varlistentry id="ignore-carrier">
+          <term><varname>ignore-carrier</varname></term>
+          <listitem>
+            <para>
+              Specify devices for which NetworkManager will (partially)
+              ignore the carrier state. Normally, for
+              device types that support carrier-detect, such as Ethernet
+              and InfiniBand, NetworkManager will only allow a
+              connection to be activated on the device if carrier is
+              present (ie, a cable is plugged in), and it will
+              deactivate the device if carrier drops for more than a few
+              seconds.
+            </para>
+            <para>
+              A device with carrier ignored will allow activating connections on
+              that device even when it does not have carrier, provided
+              that the connection uses only statically-configured IP
+              addresses. Additionally, it will allow any active
+              connection (whether static or dynamic) to remain active on
+              the device when carrier is lost.
+            </para>
+            <para>
+              Note that the "carrier" property of NMDevices and device D-Bus
+              interfaces will still reflect the actual device state; it's just
+              that NetworkManager will not make use of that information.
+            </para>
+            <para>
+              This setting overwrites the deprecated <literal>main.ignore-carrier</literal>
+              setting above.
+            </para>
+          </listitem>
+        </varlistentry>
       </variablelist>
     </para>
     </refsect2>
@@ -1012,7 +1026,8 @@ enable=nm-version-min:1.3,nm-version-min:1.2.6,nm-version-min:1.0.16
       <title>Device List Format</title>
       <para>
           The configuration options <literal>main.no-auto-default</literal>, <literal>main.ignore-carrier</literal>,
-          and <literal>keyfile.unmanaged-devices</literal> select devices based on a list of matchings.
+          <literal>keyfile.unmanaged-devices</literal>, <literal>connection*.match-device</literal> and
+          <literal>device*.match-device</literal> select devices based on a list of matchings.
           Devices can be specified using the following format:
       </para>
       <para>

src/nm-config-data.c

@@ -272,9 +272,16 @@ nm_config_data_get_rc_manager (const NMConfigData *self)
 gboolean
 nm_config_data_get_ignore_carrier (const NMConfigData *self, NMDevice *device)
 {
+	gs_free char *value = NULL;
+	gboolean has_match;
+
 	g_return_val_if_fail (NM_IS_CONFIG_DATA (self), FALSE);
 	g_return_val_if_fail (NM_IS_DEVICE (device), FALSE);
 
+	value = nm_config_data_get_device_config (self, NM_CONFIG_KEYFILE_KEY_DEVICE_IGNORE_CARRIER, device, &has_match);
+	if (has_match)
+		return nm_config_parse_boolean (value, FALSE);
+
 	return nm_device_spec_match_list (device, NM_CONFIG_DATA_GET_PRIVATE (self)->ignore_carrier);
 }
 

src/nm-config.h

@@ -70,6 +70,8 @@
 #define NM_CONFIG_KEYFILE_KEY_IFUPDOWN_MANAGED              "managed"
 #define NM_CONFIG_KEYFILE_KEY_AUDIT                         "audit"
 
+#define NM_CONFIG_KEYFILE_KEY_DEVICE_IGNORE_CARRIER         "ignore-carrier"
+
 #define NM_CONFIG_KEYFILE_KEYPREFIX_WAS                     ".was."
 #define NM_CONFIG_KEYFILE_KEYPREFIX_SET                     ".set."