Added networkd backend

Signed-off-by: Patryk Strusiewicz-Surmacki <[email protected]>

Author: p-strusiewiczsurmacki-mobica

doc/netplan-yaml.md

@@ -1361,6 +1361,11 @@ The specific settings for bridges are defined below.
   - **`vlan-filtering`** (boolean)
 
     > Enables VLAN filtering. Will be enabled by default if *vlans* are defined.
+  
+  - **`vlan-default-pvid`** (scalar)
+
+    > Specifies the default port VLAN ID. Can be set to values between 1 and 4094,
+    > or to value `none` if `networkd` is used as a renderer. Defaults to `1`.
 
   - **`hello-time`** (scalar)
 

src/abi.h

@@ -345,6 +345,7 @@ struct netplan_net_definition {
         GArray* vlans;
         GArray* port_vlans;
         gboolean vlan_filtering;
+        char* vlan_default_pvid;
     } bridge_params;
     gboolean custom_bridging;
 

src/netplan.c

@@ -356,7 +356,9 @@ write_bridge_params(yaml_event_t* event, yaml_emitter_t* emitter, const NetplanN
             }
         }
 
-        
+        if (def->bridge_params.vlan_default_pvid) {
+            YAML_STRING(def, event, emitter, "vlan-default-pvid", def->bridge_params.vlan_default_pvid);
+        }
 
         YAML_MAPPING_CLOSE(event, emitter);
     }

src/networkd.c

@@ -215,11 +215,10 @@ write_bridge_params_networkd(GString* s, const NetplanNetDefinition* def)
         if (def->bridge_params.max_age)
             g_string_append_printf(params, "MaxAgeSec=%s\n", def->bridge_params.max_age);
         g_string_append_printf(params, "STP=%s\n", def->bridge_params.stp ? "true" : "false");
-        if (def->bridge_params.vlans) {
-            // TODO: research and implement bridge vlans for networkd
-            g_fprintf(stderr, "ERROR: %s: networkd does not support bridge vlans\n", def->id);
-            exit(1);
-        }
+        if (def->bridge_params.vlan_default_pvid)
+            g_string_append_printf(params, "DefaultPVID=%s\n", def->bridge_params.vlan_default_pvid);
+        if(def->bridge_params.vlan_filtering || def->bridge_params.vlans)
+            g_string_append_printf(params, "VLANFiltering=true\n");
 
         g_string_append_printf(s, "\n[Bridge]\n%s", params->str);
 
@@ -836,6 +835,47 @@ combine_dhcp_overrides(const NetplanNetDefinition* def, NetplanDHCPOverrides* co
     return TRUE;
 }
 
+/**
+ * Return networkd vlan string.
+ */
+GString*
+bridge_vlan_networkd_str(const NetplanBridgeVlan* vlan)
+{
+    GString *id = g_string_sized_new(9);
+    GString *def = g_string_sized_new(200);
+
+    g_string_append_printf(id, "%u", vlan->vid);
+    if (vlan->vid_to)
+        g_string_append_printf(id, "-%u", vlan->vid_to);
+
+    
+    if (vlan->pvid)
+        g_string_append_printf(def, "PVID=%s\n", id->str);
+    else {
+        g_string_append_printf(def, "VLAN=%s\n", id->str);
+    }
+
+    if (vlan->untagged)
+        g_string_append_printf(def, "EgressUntagged=%s\n", id->str);
+
+    g_string_free(id, TRUE);
+
+    return def;
+}
+
+/**
+ * Write the needed networkd .network BridgeVLAN configuration for the selected vlan definition.
+ */
+STATIC void
+write_vlans(GString_autoptr network, GArray* data) {
+    g_string_append(network, "\n[BridgeVLAN]\n");
+    for (unsigned i = 0; i < data->len; ++i) {
+        GString* v = bridge_vlan_networkd_str(g_array_index(data,NetplanBridgeVlan*, i));
+        g_string_append_printf(network, "%s", v->str);
+        g_string_free(v, TRUE);
+    }
+}
+
 /**
  * Write the needed networkd .network configuration for the selected netplan definition.
  */
@@ -988,11 +1028,16 @@ _netplan_netdef_write_network_file(
         if (def->bridge_neigh_suppress != NETPLAN_TRISTATE_UNSET)
             g_string_append_printf(network, "NeighborSuppression=%s\n", def->bridge_neigh_suppress ? "true" : "false");
         if (def->bridge_params.port_vlans) {
-            // TODO: research and implement bridge port-vlans for networkd
-            g_fprintf(stderr, "ERROR: %s: networkd does not support bridge port-vlans\n", def->id);
-            exit(1);
+            // port's .netowrk file
+            write_vlans(network, def->bridge_params.port_vlans);
         }
     }
+
+    if (!def->bridge && !def->bond && def->backend != NETPLAN_BACKEND_OVS && def->bridge_params.vlans) {
+        // bridge's .network file
+        write_vlans(network, def->bridge_params.vlans);
+    }
+
     if (def->bond && def->backend != NETPLAN_BACKEND_OVS) {
         g_string_append_printf(network, "Bond=%s\n", def->bond);
 

src/nm.c

@@ -412,6 +412,13 @@ write_bridge_params_nm(const NetplanNetDefinition* def, GKeyFile *kf)
         g_key_file_set_boolean(kf, "bridge", "stp", def->bridge_params.stp);
         if(def->bridge_params.vlan_filtering || def->bridge_params.vlans)
             g_key_file_set_string(kf, "bridge", "vlan-filtering", "true");
+        if (def->bridge_params.vlan_default_pvid) {
+            if (g_str_equal(def->bridge_params.vlan_default_pvid, "none")) {
+                g_fprintf(stderr, "ERROR: vlan-default-pvid cannot be set to 'none' if NetworkManager is used\n");
+                exit(1);
+            }
+            g_key_file_set_string(kf, "bridge", "vlan-default-pvid", def->bridge_params.vlan_default_pvid);
+        }
         if (def->bridge_params.vlans) {
             for (unsigned i = 0; i < def->bridge_params.vlans->len; ++i) {
                 if (i > 0)

src/parse.c

@@ -2178,6 +2178,7 @@ handle_generic_vlans(NetplanParser* npp, yaml_node_t* node, GArray** entryptr, G
         re_inited = TRUE;
     }
 
+    unsigned pvids = 0;
     for (yaml_node_item_t *i = node->data.sequence.items.start; i < node->data.sequence.items.top; i++) {
         g_autofree char* vlan = NULL;
         yaml_node_t *entry = yaml_document_get_node(&npp->doc, *i);
@@ -2187,6 +2188,7 @@ handle_generic_vlans(NetplanParser* npp, yaml_node_t* node, GArray** entryptr, G
 
         size_t maxGroups = 7+1;
         regmatch_t groups[maxGroups];
+
         /* does it match the vlans= definition? */
         if (regexec(&re, vlan, maxGroups, groups, 0) == 0) {
             NetplanBridgeVlan* data = g_new0(NetplanBridgeVlan, 1);
@@ -2201,27 +2203,44 @@ handle_generic_vlans(NetplanParser* npp, yaml_node_t* node, GArray** entryptr, G
                 switch (g) {
                     case 1:
                         v = (guint) g_ascii_strtoull(cursorCopy + groups[g].rm_so, NULL, 10);
-                        if (v < 1 || v > 4094)
+                        if (v < 1 || v > 4094) {
+                            g_free(data);
                             return yaml_error(npp, node, error, "malformed vlan vid '%u', must be in range [1..4094]", v);
+                        }
                         data->vid = v;
                         break;
                     case 3:
                         v = (guint) g_ascii_strtoull(cursorCopy + groups[g].rm_so, NULL, 10);
-                        if (v < 1 || v > 4094)
+                        if (v < 1 || v > 4094) {
+                            g_free(data);
                             return yaml_error(npp, node, error, "malformed vlan vid '%u', must be in range [1..4094]", v);
-                        else if (v <= data->vid)
-                            return yaml_error(npp, node, error, "malformed vlan vid range '%s': %u > %u!", scalar(entry), data->vid, v);
+                        }
+                            
+                        else if (v <= data->vid) {
+                            guint vid = data->vid;
+                            g_free(data);
+                            return yaml_error(npp, node, error, "malformed vlan vid range '%s': %u > %u!", scalar(entry), vid, v);
+                        }
+                            
                         data->vid_to = v;
                         break;
                     case 5:
                         data->pvid = TRUE;
+                        if (++pvids > 1) {
+                            g_free(data);
+                            return yaml_error(npp, node, error, "malformed vlan pvid '%s': only single pvid can be defined", scalar(entry));
+                        }
                         break;
                     case 7:
                         data->untagged = TRUE;
                         break;
                     default: g_assert_not_reached(); // LCOV_EXCL_LINE
                 }
             }
+            if (data->vid_to > 0 && data->pvid) {
+                g_free(data);
+                return yaml_error(npp, node, error, "malformed vlan '%s': pvid cannot be defined as a range", scalar(entry));
+            }
             if (!*entryptr)
                 *entryptr = g_array_new(FALSE, FALSE, sizeof(NetplanBridgeVlan*));
             g_array_append_val(*entryptr, data);
@@ -2269,6 +2288,24 @@ handle_bridge_port_vlans(NetplanParser* npp, yaml_node_t* node, const char*, con
     return TRUE;
 }
 
+/**
+ * Handler for vlan-default-pvid.
+ * @data: offset into NetplanNetDefinition where the const char* field to write is
+ *        located
+ */
+STATIC gboolean
+handle_vlan_default_pvid(NetplanParser* npp, yaml_node_t* node, const void* data, GError** error)
+{
+    const char* pvid = scalar(node);
+    GError** err = NULL;
+    guint64 val = 0;
+    if (strcmp(pvid, "none") != 0 && !g_ascii_string_to_unsigned(pvid, 10, 1, 4094 , &val, err)) {
+        return yaml_error(npp, node, error, "malformed value of vlan-default-pvid '%s': vlan-default-pvid can only be defined as a single port ID", pvid);
+    }
+
+    return handle_netdef_str(npp, node, data, error);
+}
+
 static const mapping_entry_handler bridge_params_handlers[] = {
     {"ageing-time", YAML_SCALAR_NODE, {.generic=handle_netdef_str}, netdef_offset(bridge_params.ageing_time)},
     {"aging-time", YAML_SCALAR_NODE, {.generic=handle_netdef_str}, netdef_offset(bridge_params.ageing_time)},
@@ -2282,6 +2319,7 @@ static const mapping_entry_handler bridge_params_handlers[] = {
     {"port-vlans", YAML_MAPPING_NODE, {.map={.custom=handle_bridge_port_vlans}}, netdef_offset(bridge_params.port_vlans)},
     {"vlans", YAML_SEQUENCE_NODE, {.generic=handle_bridge_vlans}, netdef_offset(bridge_params.vlans)},
     {"vlan-filtering", YAML_SCALAR_NODE, {.generic=handle_netdef_bool}, netdef_offset(bridge_params.vlan_filtering)},
+    {"vlan-default-pvid", YAML_SCALAR_NODE, {.generic=handle_vlan_default_pvid}, netdef_offset(bridge_params.vlan_default_pvid)},
     {NULL}
 };
 

src/types.c

@@ -342,6 +342,7 @@ reset_netdef(NetplanNetDefinition* netdef, NetplanDefType new_type, NetplanBacke
     free_garray_with_destructor(&netdef->bridge_params.vlans, g_free);
     free_garray_with_destructor(&netdef->bridge_params.port_vlans, g_free);
     netdef->bridge_params.vlan_filtering = FALSE;
+    FREE_AND_NULLIFY(netdef->bridge_params.vlan_default_pvid);
     memset(&netdef->bridge_params, 0, sizeof(netdef->bridge_params));
     netdef->custom_bridging = FALSE;