networkd: rework headers to avoid circular includes

Header files were organized in a way where the includer would add various
typedefs used by the includee before including it, resulting in a tangled
web of dependencies between files.

Replace this with the following logic:

          networkd.h
         /          \
networkd-link.h      \
networkd-ipv4ll.h--\__\
networkd-fdb.h         \
networkd-network.h    netword-netdev-*.h
networkd-route.h           \
                      networkd-netdev.h

If a pointer to a structure defined in a different header file is needed,
use a typedef line instead of including the whole header.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/network/networkd-netdev-macvlan.h b/src/network/networkd-netdev-macvlan.h
index 622ef9ef53..3663f4f051 100644
--- a/src/network/networkd-netdev-macvlan.h
+++ b/src/network/networkd-netdev-macvlan.h
@@ -38,6 +38,8 @@ struct MacVlan {
         MacVlanMode mode;
 };
 
+DEFINE_NETDEV_CAST(MACVLAN, MacVlan);
+DEFINE_NETDEV_CAST(MACVTAP, MacVlan);
 extern const NetDevVTable macvlan_vtable;
 extern const NetDevVTable macvtap_vtable;