networkd: add basic [Link] settings to .network files

This allows the default link settings (set in .link files) to be overridden per Network. Only MTU and MACAddress is supported for now.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 7cffcb48d0..d59a8192b0 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1074,6 +1074,7 @@ static int link_up(Link *link) {
         int r;
 
         assert(link);
+        assert(link->network);
         assert(link->manager);
         assert(link->manager->rtnl);
 
@@ -1093,6 +1094,22 @@ static int link_up(Link *link) {
                 return r;
         }
 
+        if (link->network->mac) {
+                r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
+                if (r < 0) {
+                        log_link_error(link, "Could not set MAC address: %s", strerror(-r));
+                        return r;
+                }
+        }
+
+        if (link->network->mtu) {
+                r = sd_rtnl_message_append_u32(req, IFLA_MTU, link->network->mtu);
+                if (r < 0) {
+                        log_link_error(link, "Could not set MTU: %s", strerror(-r));
+                        return r;
+                }
+        }
+
         r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link,
                                0, NULL);
         if (r < 0) {