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-rw-r--r--man/systemd.network.xml11
-rw-r--r--src/network/networkd-network-gperf.gperf1
-rw-r--r--src/network/networkd-route.c35
-rw-r--r--src/network/networkd-route.h1
4 files changed, 47 insertions, 1 deletions
diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index b52c1ff7e4..82629b9172 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -1099,7 +1099,16 @@
</para>
</listitem>
</varlistentry>
-
+ <varlistentry>
+ <term><varname>MTUBytes=</varname></term>
+ <listitem>
+ <para>The maximum transmission unit in bytes to set for the
+ route. The usual suffixes K, M, G, are supported and are
+ understood to the base of 1024.</para>
+ <para>Note that if IPv6 is enabled on the interface, and the MTU is chosen
+ below 1280 (the minimum MTU for IPv6) it will automatically be increased to this value.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index e3d84a365d..23f57ca2f0 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -105,6 +105,7 @@ Route.Metric, config_parse_route_priority,
Route.Scope, config_parse_route_scope, 0, 0
Route.PreferredSource, config_parse_preferred_src, 0, 0
Route.Table, config_parse_route_table, 0, 0
+Route.MTUBytes, config_parse_route_mtu, AF_UNSPEC, 0
Route.GatewayOnlink, config_parse_gateway_onlink, 0, 0
Route.IPv6Preference, config_parse_ipv6_route_preference, 0, 0
Route.Protocol, config_parse_route_protocol, 0, 0
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index 63a6b9c2e0..a5303dafa1 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -1177,3 +1177,38 @@ int config_parse_quickack(
return 0;
}
+
+int config_parse_route_mtu(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ Network *network = userdata;
+ _cleanup_(route_freep) Route *n = NULL;
+ int r;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = route_new_static(network, filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ r = config_parse_mtu(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &n->mtu, userdata);
+ if (r < 0)
+ return r;
+
+ n = NULL;
+
+ return 0;
+}
diff --git a/src/network/networkd-route.h b/src/network/networkd-route.h
index 138bad7a1a..61a81b4150 100644
--- a/src/network/networkd-route.h
+++ b/src/network/networkd-route.h
@@ -75,3 +75,4 @@ CONFIG_PARSER_PROTOTYPE(config_parse_route_protocol);
CONFIG_PARSER_PROTOTYPE(config_parse_route_type);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_quickack);
+CONFIG_PARSER_PROTOTYPE(config_parse_route_mtu);