platform: add vxlan support

Add a new method to the platform code to create vxlan devices.

src/platform/nm-fake-platform.c

@@ -708,6 +708,31 @@ link_vlan_change (NMPlatform *platform,
 	return FALSE;
 }
 
+static gboolean
+link_vxlan_add (NMPlatform *platform,
+                const char *name,
+                NMPlatformLnkVxlan *props,
+                NMPlatformLink *out_link)
+{
+	NMFakePlatformLink *device;
+
+	if (!link_add (platform, name, NM_LINK_TYPE_VXLAN, NULL, 0, NULL))
+		return FALSE;
+
+	device = link_get (platform, nm_platform_link_get_ifindex (platform, name));
+
+	g_return_val_if_fail (device, FALSE);
+	g_return_val_if_fail (!device->lnk, FALSE);
+
+	device->lnk = nmp_object_new (NMP_OBJECT_TYPE_LNK_VXLAN, NULL);
+	device->lnk->lnk_vxlan = *props;
+	device->link.parent = props->parent_ifindex;
+
+	if (out_link)
+		*out_link = device->link;
+	return TRUE;
+}
+
 static gboolean
 infiniband_partition_add (NMPlatform *platform, int parent, int p_key, NMPlatformLink *out_link)
 {
@@ -1458,6 +1483,7 @@ nm_fake_platform_class_init (NMFakePlatformClass *klass)
 
 	platform_class->vlan_add = vlan_add;
 	platform_class->link_vlan_change = link_vlan_change;
+	platform_class->link_vxlan_add = link_vxlan_add;
 
 	platform_class->infiniband_partition_add = infiniband_partition_add;
 

src/platform/nm-linux-platform.c

@@ -25,6 +25,7 @@
 #include <sys/ioctl.h>
 #include <fcntl.h>
 #include <dlfcn.h>
+#include <arpa/inet.h>
 #include <netinet/icmp6.h>
 #include <netinet/in.h>
 #include <linux/ip.h>
@@ -4466,6 +4467,80 @@ nla_put_failure:
 	g_return_val_if_reached (FALSE);
 }
 
+static gboolean
+link_vxlan_add (NMPlatform *platform,
+                const char *name,
+                NMPlatformLnkVxlan *props,
+                NMPlatformLink *out_link)
+{
+	nm_auto_nlmsg struct nl_msg *nlmsg = NULL;
+	struct nlattr *info;
+	struct nlattr *data;
+	struct nm_ifla_vxlan_port_range port_range;
+
+	g_return_val_if_fail (props, FALSE);
+
+	_LOGD ("link: add vxlan '%s', parent %d, vxlan id %d",
+	       name, props->parent_ifindex, props->id);
+
+	nlmsg = _nl_msg_new_link (RTM_NEWLINK,
+	                          NLM_F_CREATE,
+	                          0,
+	                          name,
+	                          0,
+	                          0);
+	if (!nlmsg)
+		return FALSE;
+
+	if (!(info = nla_nest_start (nlmsg, IFLA_LINKINFO)))
+		goto nla_put_failure;
+
+	NLA_PUT_STRING (nlmsg, IFLA_INFO_KIND, "vxlan");
+
+	if (!(data = nla_nest_start (nlmsg, IFLA_INFO_DATA)))
+		goto nla_put_failure;
+
+	NLA_PUT_U32 (nlmsg, IFLA_VXLAN_ID, props->id);
+
+	if (props->group)
+		NLA_PUT (nlmsg, IFLA_VXLAN_GROUP, sizeof (props->group), &props->group);
+	else if (memcmp (&props->group6, &in6addr_any, sizeof (in6addr_any)))
+		NLA_PUT (nlmsg, IFLA_VXLAN_GROUP6, sizeof (props->group6), &props->group6);
+
+	if (props->local)
+		NLA_PUT (nlmsg, IFLA_VXLAN_LOCAL, sizeof (props->local), &props->local);
+	else if (memcmp (&props->local6, &in6addr_any, sizeof (in6addr_any)))
+		NLA_PUT (nlmsg, IFLA_VXLAN_LOCAL6, sizeof (props->local6), &props->local6);
+
+	if (props->parent_ifindex >= 0)
+		NLA_PUT_U32 (nlmsg, IFLA_VXLAN_LINK, props->parent_ifindex);
+
+	if (props->src_port_min || props->src_port_max) {
+		port_range.low = htons (props->src_port_min);
+		port_range.high = htons (props->src_port_max);
+		NLA_PUT (nlmsg, IFLA_VXLAN_PORT_RANGE, sizeof (port_range), &port_range);
+	}
+
+	NLA_PUT_U16 (nlmsg, IFLA_VXLAN_PORT, htons (props->dst_port));
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_TOS, props->tos);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_TTL, props->ttl);
+	NLA_PUT_U32 (nlmsg, IFLA_VXLAN_AGEING, props->ageing);
+	NLA_PUT_U32 (nlmsg, IFLA_VXLAN_LIMIT, props->limit);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_LEARNING, !!props->learning);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_PROXY, !!props->proxy);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_RSC, !!props->rsc);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_L2MISS, !!props->l2miss);
+	NLA_PUT_U8 (nlmsg, IFLA_VXLAN_L3MISS, !!props->l3miss);
+
+	nla_nest_end (nlmsg, data);
+	nla_nest_end (nlmsg, info);
+
+	return do_add_link_with_lookup (platform, NM_LINK_TYPE_VXLAN, name, nlmsg, out_link);
+
+nla_put_failure:
+	g_return_val_if_reached (FALSE);
+}
+
 static void
 _vlan_change_vlan_qos_mapping_create (gboolean is_ingress_map,
                                       gboolean reset_all,
@@ -5899,6 +5974,7 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
 
 	platform_class->vlan_add = vlan_add;
 	platform_class->link_vlan_change = link_vlan_change;
+	platform_class->link_vxlan_add = link_vxlan_add;
 
 	platform_class->tun_add = tun_add;
 

src/platform/nm-platform.c

@@ -1559,6 +1559,38 @@ nm_platform_vlan_add (NMPlatform *self,
 	return NM_PLATFORM_ERROR_SUCCESS;
 }
 
+/**
+ * nm_platform_link_vxlan_add:
+ * @self: platform instance
+ * @name: New interface name
+ * @props: properties of the new link
+ * @out_link: on success, the link object
+ *
+ * Create a VXLAN device.
+ */
+NMPlatformError
+nm_platform_link_vxlan_add (NMPlatform *self,
+                            const char *name,
+                            NMPlatformLnkVxlan *props,
+                            NMPlatformLink *out_link)
+{
+	NMPlatformError plerr;
+
+	_CHECK_SELF (self, klass, NM_PLATFORM_ERROR_BUG);
+
+	g_return_val_if_fail (props, NM_PLATFORM_ERROR_BUG);
+
+	plerr = _link_add_check_existing (self, name, NM_LINK_TYPE_VXLAN, out_link);
+	if (plerr != NM_PLATFORM_ERROR_SUCCESS)
+		return plerr;
+
+	_LOGD ("link: adding vxlan '%s' parent %d id %d",
+	       name, props->parent_ifindex, props->id);
+	if (!klass->link_vxlan_add (self, name, props, out_link))
+		return NM_PLATFORM_ERROR_UNSPECIFIED;
+	return NM_PLATFORM_ERROR_SUCCESS;
+}
+
 /**
  * nm_platform_tun_add:
  * @self: platform instance
@@ -1596,7 +1628,6 @@ nm_platform_tun_add (NMPlatform *self, const char *name, gboolean tap,
 	return NM_PLATFORM_ERROR_SUCCESS;
 }
 
-
 gboolean
 nm_platform_master_set_option (NMPlatform *self, int ifindex, const char *option, const char *value)
 {

src/platform/nm-platform.h

@@ -561,6 +561,8 @@ typedef struct {
 	                              gboolean egress_reset_all,
 	                              const NMVlanQosMapping *egress_map,
 	                              gsize n_egress_map);
+	gboolean (*link_vxlan_add) (NMPlatform *, const char *name, NMPlatformLnkVxlan *props,
+	                            NMPlatformLink *out_link);
 
 	gboolean (*link_gre_add) (NMPlatform *, const char *name, NMPlatformLnkGre *props,
 	                          NMPlatformLink *out_link);
@@ -785,6 +787,7 @@ gboolean nm_platform_link_vlan_change (NMPlatform *self,
                                        const NMVlanQosMapping *egress_map,
                                        gsize n_egress_map);
 
+NMPlatformError nm_platform_link_vxlan_add (NMPlatform *self, const char *name, NMPlatformLnkVxlan *props, NMPlatformLink *out_link);
 
 NMPlatformError nm_platform_tun_add (NMPlatform *self, const char *name, gboolean tap, gint64 owner, gint64 group, gboolean pi,
                                      gboolean vnet_hdr, gboolean multi_queue, NMPlatformLink *out_link);