chiark / gitweb /
networkd: remove unused variable
[elogind.git] / src / network / networkd-link.c
index 1b7b1898c4e13bd4907ea2a5e353a3e94435a59e..06e093a18516497f29ea05eb4a1490f2a68f6242 100644 (file)
 
 #include "dhcp-lease-internal.h"
 
+static bool link_dhcp6_enabled(Link *link) {
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return IN_SET(link->network->dhcp, DHCP_SUPPORT_V6, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_enabled(Link *link) {
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return IN_SET(link->network->dhcp, DHCP_SUPPORT_V4, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_server_enabled(Link *link) {
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->dhcp_server;
+}
+
+static bool link_ipv4ll_enabled(Link *link) {
+        if (link->flags & IFF_LOOPBACK)
+                return false;
+
+        if (!link->network)
+                return false;
+
+        return link->network->ipv4ll;
+}
+
 #define FLAG_STRING(string, flag, old, new) \
         (((old ^ new) & flag) \
                 ? ((old & flag) ? (" -" string) : (" +" string)) \
@@ -49,7 +89,7 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) {
 
         r = sd_rtnl_message_link_get_flags(m, &flags);
         if (r < 0) {
-                log_warning_link(link, "Could not get link flags");
+                log_link_warning(link, "Could not get link flags");
                 return r;
         }
 
@@ -63,7 +103,7 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) {
                 return 0;
 
         if (link->flags != flags) {
-                log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+                log_link_debug(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
                                FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
                                FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
                                FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
@@ -96,12 +136,12 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) {
                 /* link flags are currently at most 18 bits, let's align to
                  * printing 20 */
                 if (unknown_flags_added)
-                        log_debug_link(link,
+                        log_link_debug(link,
                                        "unknown link flags gained: %#.5x (ignoring)",
                                        unknown_flags_added);
 
                 if (unknown_flags_removed)
-                        log_debug_link(link,
+                        log_link_debug(link,
                                        "unknown link flags lost: %#.5x (ignoring)",
                                        unknown_flags_removed);
         }
@@ -154,7 +194,7 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
 
         r = sd_rtnl_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
         if (r < 0)
-                log_debug_link(link, "MAC address not found for new device, continuing without");
+                log_link_debug(link, "MAC address not found for new device, continuing without");
 
         r = asprintf(&link->state_file, "/run/systemd/netif/links/%d",
                      link->ifindex);
@@ -166,7 +206,7 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
         if (r < 0)
                 return -ENOMEM;
 
-        r = hashmap_ensure_allocated(&manager->links, NULL, NULL);
+        r = hashmap_ensure_allocated(&manager->links, NULL);
         if (r < 0)
                 return r;
 
@@ -259,7 +299,7 @@ void link_drop(Link *link) {
 
         link->state = LINK_STATE_LINGER;
 
-        log_debug_link(link, "link removed");
+        log_link_debug(link, "link removed");
 
         link_unref(link);
 
@@ -269,7 +309,7 @@ void link_drop(Link *link) {
 static void link_enter_unmanaged(Link *link) {
         assert(link);
 
-        log_debug_link(link, "unmanaged");
+        log_link_debug(link, "unmanaged");
 
         link->state = LINK_STATE_UNMANAGED;
 
@@ -289,7 +329,7 @@ static int link_stop_clients(Link *link) {
         if (link->dhcp_client) {
                 k = sd_dhcp_client_stop(link->dhcp_client);
                 if (k < 0) {
-                        log_warning_link(link, "Could not stop DHCPv4 client: %s",
+                        log_link_warning(link, "Could not stop DHCPv4 client: %s",
                                          strerror(-r));
                         r = k;
                 }
@@ -298,16 +338,7 @@ static int link_stop_clients(Link *link) {
         if (link->ipv4ll) {
                 k = sd_ipv4ll_stop(link->ipv4ll);
                 if (k < 0) {
-                        log_warning_link(link, "Could not stop IPv4 link-local: %s",
-                                         strerror(-r));
-                        r = k;
-                }
-        }
-
-        if (link->dhcp_server) {
-                k = sd_dhcp_server_stop(link->dhcp_server);
-                if (k < 0) {
-                        log_warning_link(link, "Could not stop DHCPv4 server: %s",
+                        log_link_warning(link, "Could not stop IPv4 link-local: %s",
                                          strerror(-r));
                         r = k;
                 }
@@ -318,7 +349,7 @@ static int link_stop_clients(Link *link) {
                 if (link->dhcp6_client) {
                         k = sd_dhcp6_client_stop(link->dhcp6_client);
                         if (k < 0) {
-                                log_warning_link(link, "Could not stop DHCPv6 client: %s",
+                                log_link_warning(link, "Could not stop DHCPv6 client: %s",
                                                  strerror(-r));
                                 r = k;
                         }
@@ -326,7 +357,7 @@ static int link_stop_clients(Link *link) {
 
                 k = sd_icmp6_nd_stop(link->icmp6_router_discovery);
                 if (k < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "Could not stop ICMPv6 router discovery: %s",
                                          strerror(-r));
                         r = k;
@@ -342,7 +373,7 @@ void link_enter_failed(Link *link) {
         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return;
 
-        log_warning_link(link, "failed");
+        log_link_warning(link, "failed");
 
         link->state = LINK_STATE_FAILED;
 
@@ -387,20 +418,20 @@ static int link_enter_configured(Link *link) {
         assert(link->network);
         assert(link->state == LINK_STATE_SETTING_ROUTES);
 
-        if (link->network->dhcp_server &&
+        if (link_dhcp4_server_enabled(link) &&
             !sd_dhcp_server_is_running(link->dhcp_server)) {
                 struct in_addr pool_start;
                 Address *address;
 
                 address = link_find_dhcp_server_address(link);
                 if (!address) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "Failed to find suitable address for DHCPv4 server instance.");
                         link_enter_failed(link);
                         return 0;
                 }
 
-                log_debug_link(link, "offering DHCPv4 leases");
+                log_link_debug(link, "offering DHCPv4 leases");
 
                 r = sd_dhcp_server_set_address(link->dhcp_server,
                                                &address->in_addr.in,
@@ -429,7 +460,7 @@ static int link_enter_configured(Link *link) {
 
                 r = sd_dhcp_server_start(link->dhcp_server);
                 if (r < 0) {
-                        log_warning_link(link, "could not start DHCPv4 server "
+                        log_link_warning(link, "could not start DHCPv4 server "
                                          "instance: %s", strerror(-r));
 
                         link_enter_failed(link);
@@ -438,7 +469,7 @@ static int link_enter_configured(Link *link) {
                 }
         }
 
-        log_info_link(link, "link configured");
+        log_link_info(link, "link configured");
 
         link->state = LINK_STATE_CONFIGURED;
 
@@ -454,13 +485,12 @@ void link_client_handler(Link *link) {
         if (!link->static_configured)
                 return;
 
-        if (link->network->ipv4ll)
+        if (link_ipv4ll_enabled(link))
                 if (!link->ipv4ll_address ||
                     !link->ipv4ll_route)
                         return;
 
-        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4))
-                if (!link->dhcp4_configured)
+        if (link_dhcp4_enabled(link) && !link->dhcp4_configured)
                         return;
 
         if (link->state != LINK_STATE_CONFIGURED)
@@ -485,15 +515,10 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not set route: %s",
-                                IFNAMSIZ,
-                                link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
+                log_link_warning_errno(link, -r, "%-*s: could not set route: %m", IFNAMSIZ, link->ifname);
 
         if (link->link_messages == 0) {
-                log_debug_link(link, "routes set");
+                log_link_debug(link, "routes set");
                 link->static_configured = true;
                 link_client_handler(link);
         }
@@ -514,7 +539,7 @@ static int link_enter_set_routes(Link *link) {
         LIST_FOREACH(routes, rt, link->network->static_routes) {
                 r = route_configure(rt, link, &route_handler);
                 if (r < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "could not set routes: %s",
                                          strerror(-r));
                         link_enter_failed(link);
@@ -528,7 +553,7 @@ static int link_enter_set_routes(Link *link) {
                 link->static_configured = true;
                 link_client_handler(link);
         } else
-                log_debug_link(link, "setting routes");
+                log_link_debug(link, "setting routes");
 
         return 0;
 }
@@ -546,38 +571,7 @@ int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -ESRCH)
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not drop route: %s",
-                                IFNAMSIZ,
-                                link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
-
-        return 1;
-}
-
-int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        _cleanup_link_unref_ Link *link = userdata;
-        int r;
-
-        assert(rtnl);
-        assert(m);
-        assert(link);
-        assert(link->manager);
-
-        for (; m; m = sd_rtnl_message_next(m)) {
-                r = sd_rtnl_message_get_errno(m);
-                if (r < 0) {
-                        log_debug_link(link, "getting address failed: %s",
-                                       strerror(-r));
-                        continue;
-                }
-
-                r = link_rtnl_process_address(rtnl, m, link->manager);
-                if (r < 0)
-                        log_warning_link(link, "could not process address: %s",
-                                         strerror(-r));
-        }
+                log_link_warning_errno(link, -r, "%-*s: could not drop route: %m", IFNAMSIZ, link->ifname);
 
         return 1;
 }
@@ -601,20 +595,12 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not set address: %s",
-                                IFNAMSIZ,
-                                link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
-        else if (r >= 0) {
-                /* calling handler directly so take a ref */
-                link_ref(link);
-                link_get_address_handler(rtnl, m, link);
-        }
+                log_link_warning_errno(link, -r, "%-*s: could not set address: %m", IFNAMSIZ, link->ifname);
+        else if (r >= 0)
+                link_rtnl_process_address(rtnl, m, link->manager);
 
         if (link->link_messages == 0) {
-                log_debug_link(link, "addresses set");
+                log_link_debug(link, "addresses set");
                 link_enter_set_routes(link);
         }
 
@@ -634,7 +620,7 @@ static int link_enter_set_addresses(Link *link) {
         LIST_FOREACH(addresses, ad, link->network->static_addresses) {
                 r = address_configure(ad, link, &address_handler);
                 if (r < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "could not set addresses: %s",
                                          strerror(-r));
                         link_enter_failed(link);
@@ -647,7 +633,7 @@ static int link_enter_set_addresses(Link *link) {
         if (link->link_messages == 0) {
                 link_enter_set_routes(link);
         } else
-                log_debug_link(link, "setting addresses");
+                log_link_debug(link, "setting addresses");
 
         return 0;
 }
@@ -665,14 +651,30 @@ int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EADDRNOTAVAIL)
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not drop address: %s",
+                log_link_warning_errno(link, -r, "%-*s: could not drop address: %m", IFNAMSIZ, link->ifname);
+
+        return 1;
+}
+
+static int link_set_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        log_link_debug(link, "set link");
+
+        r = sd_rtnl_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_struct(link, LOG_ERR,
+                                "MESSAGE=%-*s: could not join netdev: %s",
                                 IFNAMSIZ,
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
                                 NULL);
+                link_enter_failed(link);
+                return 1;
+        }
 
-        return 1;
+        return 0;
 }
 
 static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata,
@@ -686,10 +688,8 @@ static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata,
                 return 1;
 
         r = sd_bus_message_get_errno(m);
-        if (r < 0)
-                r = -r;
         if (r > 0)
-                log_warning_link(link, "Could not set hostname: %s",
+                log_link_warning(link, "Could not set hostname: %s",
                                  strerror(r));
 
         return 1;
@@ -703,11 +703,11 @@ int link_set_hostname(Link *link, const char *hostname) {
         assert(link->manager);
         assert(hostname);
 
-        log_debug_link(link, "Setting transient hostname: '%s'", hostname);
+        log_link_debug(link, "Setting transient hostname: '%s'", hostname);
 
         if (!link->manager->bus) {
                 /* TODO: replace by assert when we can rely on kdbus */
-                log_info_link(link,
+                log_link_info(link,
                               "Not connected to system bus, ignoring transient hostname.");
                 return 0;
         }
@@ -729,7 +729,7 @@ int link_set_hostname(Link *link, const char *hostname) {
         r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler,
                               link, 0);
         if (r < 0) {
-                log_error_link(link, "Could not set transient hostname: %s",
+                log_link_error(link, "Could not set transient hostname: %s",
                                strerror(-r));
                 return r;
         }
@@ -752,11 +752,7 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0)
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not set MTU: %s",
-                                IFNAMSIZ, link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
+                log_link_warning_errno(link, -r, "%-*s: could not set MTU: %m", IFNAMSIZ, link->ifname);
 
         return 1;
 }
@@ -769,25 +765,25 @@ int link_set_mtu(Link *link, uint32_t mtu) {
         assert(link->manager);
         assert(link->manager->rtnl);
 
-        log_debug_link(link, "setting MTU: %" PRIu32, mtu);
+        log_link_debug(link, "setting MTU: %" PRIu32, mtu);
 
         r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
                                      RTM_SETLINK, link->ifindex);
         if (r < 0) {
-                log_error_link(link, "Could not allocate RTM_SETLINK message");
+                log_link_error(link, "Could not allocate RTM_SETLINK message");
                 return r;
         }
 
         r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
         if (r < 0) {
-                log_error_link(link, "Could not append MTU: %s", strerror(-r));
+                log_link_error(link, "Could not append MTU: %s", strerror(-r));
                 return r;
         }
 
         r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link,
                                0, NULL);
         if (r < 0) {
-                log_error_link(link,
+                log_link_error(link,
                                "Could not send rtnetlink message: %s",
                                strerror(-r));
                 return r;
@@ -798,6 +794,69 @@ int link_set_mtu(Link *link, uint32_t mtu) {
         return 0;
 }
 
+static int link_set_bridge(Link *link) {
+        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        if(link->network->cost == 0)
+                return 0;
+
+        r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
+                                     RTM_SETLINK, link->ifindex);
+        if (r < 0) {
+                log_link_error(link, "Could not allocate RTM_SETLINK message");
+                return r;
+        }
+
+        r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
+        if (r < 0) {
+                log_link_error(link,
+                               "Could not set message family %s", strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_message_open_container(req, IFLA_PROTINFO);
+        if (r < 0) {
+                log_link_error(link,
+                               "Could not append IFLA_PROTINFO attribute: %s",
+                               strerror(-r));
+                return r;
+        }
+
+        if(link->network->cost != 0) {
+                r = sd_rtnl_message_append_u32(req, IFLA_BRPORT_COST, link->network->cost);
+                if (r < 0) {
+                        log_link_error(link,
+                                       "Could not append IFLA_BRPORT_COST attribute: %s",
+                                       strerror(-r));
+                        return r;
+                }
+        }
+
+        r = sd_rtnl_message_close_container(req);
+        if (r < 0) {
+                log_link_error(link,
+                               "Could not append IFLA_LINKINFO attribute: %s",
+                               strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_call_async(link->manager->rtnl, req, link_set_handler, link, 0, NULL);
+        if (r < 0) {
+                log_link_error(link,
+                               "Could not send rtnetlink message: %s",
+                               strerror(-r));
+                return r;
+        }
+
+        link_ref(link);
+
+        return r;
+}
+
 static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
         Link *link = userdata;
 
@@ -813,16 +872,16 @@ static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
         case DHCP6_EVENT_RESEND_EXPIRE:
         case DHCP6_EVENT_RETRANS_MAX:
         case DHCP6_EVENT_IP_ACQUIRE:
-                log_debug_link(link, "DHCPv6 event %d", event);
+                log_link_debug(link, "DHCPv6 event %d", event);
 
                 break;
 
         default:
                 if (event < 0)
-                        log_warning_link(link, "DHCPv6 error: %s",
+                        log_link_warning(link, "DHCPv6 error: %s",
                                          strerror(-event));
                 else
-                        log_warning_link(link, "DHCPv6 unknown event: %d",
+                        log_link_warning(link, "DHCPv6 unknown event: %d",
                                          event);
                 return;
         }
@@ -850,10 +909,10 @@ static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
 
         default:
                 if (event < 0)
-                        log_warning_link(link, "ICMPv6 error: %s",
+                        log_link_warning(link, "ICMPv6 error: %s",
                                          strerror(-event));
                 else
-                        log_warning_link(link, "ICMPv6 unknown event: %d",
+                        log_link_warning(link, "ICMPv6 unknown event: %d",
                                          event);
 
                 return;
@@ -872,7 +931,9 @@ static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
                 return;
         }
 
-        r = sd_dhcp6_client_set_mac(link->dhcp6_client, &link->mac);
+        r = sd_dhcp6_client_set_mac(link->dhcp6_client,
+                                    (const uint8_t *) &link->mac,
+                                    sizeof (link->mac), ARPHRD_ETHER);
         if (r < 0) {
                 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
                 return;
@@ -904,40 +965,40 @@ static int link_acquire_conf(Link *link) {
         assert(link->manager);
         assert(link->manager->event);
 
-        if (link->network->ipv4ll) {
+        if (link_ipv4ll_enabled(link)) {
                 assert(link->ipv4ll);
 
-                log_debug_link(link, "acquiring IPv4 link-local address");
+                log_link_debug(link, "acquiring IPv4 link-local address");
 
                 r = sd_ipv4ll_start(link->ipv4ll);
                 if (r < 0) {
-                        log_warning_link(link, "could not acquire IPv4 "
+                        log_link_warning(link, "could not acquire IPv4 "
                                          "link-local address");
                         return r;
                 }
         }
 
-        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
+        if (link_dhcp4_enabled(link)) {
                 assert(link->dhcp_client);
 
-                log_debug_link(link, "acquiring DHCPv4 lease");
+                log_link_debug(link, "acquiring DHCPv4 lease");
 
                 r = sd_dhcp_client_start(link->dhcp_client);
                 if (r < 0) {
-                        log_warning_link(link, "could not acquire DHCPv4 "
+                        log_link_warning(link, "could not acquire DHCPv4 "
                                          "lease");
                         return r;
                 }
         }
 
-        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
+        if (link_dhcp6_enabled(link)) {
                 assert(link->icmp6_router_discovery);
 
-                log_debug_link(link, "discovering IPv6 routers");
+                log_link_debug(link, "discovering IPv6 routers");
 
                 r = sd_icmp6_router_solicitation_start(link->icmp6_router_discovery);
                 if (r < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "could not start IPv6 router discovery");
                         return r;
                 }
@@ -973,12 +1034,7 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         if (r < 0) {
                 /* we warn but don't fail the link, as it may
                    be brought up later */
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%-*s: could not bring up interface: %s",
-                                IFNAMSIZ,
-                                link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
+                log_link_warning_errno(link, -r, "%-*s: could not bring up interface: %m", IFNAMSIZ, link->ifname);
         }
 
         return 1;
@@ -989,29 +1045,46 @@ static int link_up(Link *link) {
         int r;
 
         assert(link);
+        assert(link->network);
         assert(link->manager);
         assert(link->manager->rtnl);
 
-        log_debug_link(link, "bringing link up");
+        log_link_debug(link, "bringing link up");
 
         r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
                                      RTM_SETLINK, link->ifindex);
         if (r < 0) {
-                log_error_link(link, "Could not allocate RTM_SETLINK message");
+                log_link_error(link, "Could not allocate RTM_SETLINK message");
                 return r;
         }
 
         r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
         if (r < 0) {
-                log_error_link(link, "Could not set link flags: %s",
+                log_link_error(link, "Could not set link flags: %s",
                                strerror(-r));
                 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) {
-                log_error_link(link,
+                log_link_error(link,
                                "Could not send rtnetlink message: %s",
                                strerror(-r));
                 return r;
@@ -1036,6 +1109,15 @@ static int link_joined(Link *link) {
                 }
         }
 
+        if(link->network->bridge) {
+                r = link_set_bridge(link);
+                if (r < 0) {
+                        log_link_error(link,
+                                       "Could not set bridge message: %s",
+                                       strerror(-r));
+                }
+        }
+
         return link_enter_set_addresses(link);
 }
 
@@ -1054,16 +1136,11 @@ static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST) {
-                log_struct_link(LOG_ERR, link,
-                                "MESSAGE=%-*s: could not join netdev: %s",
-                                IFNAMSIZ,
-                                link->ifname, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
+                log_link_error_errno(link, -r, "%-*s: could not join netdev: %m", IFNAMSIZ, link->ifname);
                 link_enter_failed(link);
                 return 1;
         } else
-                log_debug_link(link, "joined netdev");
+                log_link_debug(link, "joined netdev");
 
         if (link->enslaving <= 0)
                 link_joined(link);
@@ -1090,7 +1167,7 @@ static int link_enter_join_netdev(Link *link) {
                 return link_joined(link);
 
         if (link->network->bond) {
-                log_struct_link(LOG_DEBUG, link,
+                log_link_struct(link, LOG_DEBUG,
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
                                 link->ifname, link->network->bond->ifname,
@@ -1099,7 +1176,7 @@ static int link_enter_join_netdev(Link *link) {
 
                 r = netdev_join(link->network->bond, link, &netdev_join_handler);
                 if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
+                        log_link_struct(link, LOG_WARNING,
                                         "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bond->ifname,
@@ -1114,7 +1191,7 @@ static int link_enter_join_netdev(Link *link) {
         }
 
         if (link->network->bridge) {
-                log_struct_link(LOG_DEBUG, link,
+                log_link_struct(link, LOG_DEBUG,
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
                                 link->ifname, link->network->bridge->ifname,
@@ -1124,7 +1201,7 @@ static int link_enter_join_netdev(Link *link) {
                 r = netdev_join(link->network->bridge, link,
                                 &netdev_join_handler);
                 if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
+                        log_link_struct(link, LOG_WARNING,
                                         "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bridge->ifname,
@@ -1139,7 +1216,7 @@ static int link_enter_join_netdev(Link *link) {
         }
 
         HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
-                log_struct_link(LOG_DEBUG, link,
+                log_link_struct(link, LOG_DEBUG,
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
                                 link->ifname, netdev->ifname, NETDEVIF(netdev),
@@ -1147,7 +1224,7 @@ static int link_enter_join_netdev(Link *link) {
 
                 r = netdev_join(netdev, link, &netdev_join_handler);
                 if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
+                        log_link_struct(link, LOG_WARNING,
                                         "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, netdev->ifname,
@@ -1170,19 +1247,19 @@ static int link_configure(Link *link) {
         assert(link->network);
         assert(link->state == LINK_STATE_PENDING);
 
-        if (link->network->ipv4ll) {
+        if (link_ipv4ll_enabled(link)) {
                 r = ipv4ll_configure(link);
                 if (r < 0)
                         return r;
         }
 
-        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
+        if (link_dhcp4_enabled(link)) {
                 r = dhcp4_configure(link);
                 if (r < 0)
                         return r;
         }
 
-        if (link->network->dhcp_server) {
+        if (link_dhcp4_server_enabled(link)) {
                 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
                 if (r < 0)
                         return r;
@@ -1192,7 +1269,7 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
+        if (link_dhcp6_enabled(link)) {
                 r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
                 if (r < 0)
                         return r;
@@ -1240,7 +1317,7 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
         if (link->state != LINK_STATE_PENDING)
                 return 1;
 
-        log_debug_link(link, "link state is up-to-date");
+        log_link_debug(link, "link state is up-to-date");
 
         r = network_get(link->manager, link->udev_device, link->ifname,
                         &link->mac, &network);
@@ -1250,6 +1327,17 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
         } else if (r < 0)
                 return r;
 
+        if (link->flags & IFF_LOOPBACK) {
+                if (network->ipv4ll)
+                        log_link_debug(link, "ignoring IPv4LL for loopback link");
+
+                if (network->dhcp != DHCP_SUPPORT_NONE)
+                        log_link_debug(link, "ignoring DHCP clients for loopback link");
+
+                if (network->dhcp_server)
+                        log_link_debug(link, "ignoring DHCP server for loopback link");
+        }
+
         r = network_apply(link->manager, network, link);
         if (r < 0)
                 return r;
@@ -1276,7 +1364,7 @@ int link_initialized(Link *link, struct udev_device *device) {
         if (link->udev_device)
                 return 0;
 
-        log_debug_link(link, "udev initialized link");
+        log_link_debug(link, "udev initialized link");
 
         link->udev_device = udev_device_ref(device);
 
@@ -1300,8 +1388,7 @@ int link_initialized(Link *link, struct udev_device *device) {
         return 0;
 }
 
-int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
-                              void *userdata) {
+int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
         Manager *m = userdata;
         Link *link = NULL;
         uint16_t type;
@@ -1317,6 +1404,14 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
         assert(message);
         assert(m);
 
+        if (sd_rtnl_message_is_error(message)) {
+                r = sd_rtnl_message_get_errno(message);
+                if (r < 0)
+                        log_warning_errno(r, "rtnl: failed to receive address: %m");
+
+                return 0;
+        }
+
         r = sd_rtnl_message_get_type(message, &type);
         if (r < 0) {
                 log_warning("rtnl: could not get message type");
@@ -1324,13 +1419,16 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
         }
 
         r = sd_rtnl_message_addr_get_ifindex(message, &ifindex);
-        if (r < 0 || ifindex <= 0) {
-                log_warning("rtnl: received address message without valid ifindex, ignoring");
+        if (r < 0) {
+                log_warning_errno(r, "rtnl: could not get ifindex: %m");
+                return 0;
+        } else if (ifindex <= 0) {
+                log_warning("rtnl: received address message with invalid ifindex: %d", ifindex);
                 return 0;
         } else {
                 r = link_get(m, ifindex, &link);
                 if (r < 0 || !link) {
-                        log_warning("rtnl: received address for a nonexistent link, ignoring");
+                        log_warning("rtnl: received address for nonexistent link (%d), ignoring", ifindex);
                         return 0;
                 }
         }
@@ -1341,28 +1439,28 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
 
         r = sd_rtnl_message_addr_get_family(message, &address->family);
         if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
-                log_warning_link(link,
+                log_link_warning(link,
                                  "rtnl: received address with invalid family, ignoring");
                 return 0;
         }
 
         r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
         if (r < 0) {
-                log_warning_link(link,
+                log_link_warning(link,
                                  "rtnl: received address with invalid prefixlen, ignoring");
                 return 0;
         }
 
         r = sd_rtnl_message_addr_get_scope(message, &address->scope);
         if (r < 0) {
-                log_warning_link(link,
+                log_link_warning(link,
                                  "rtnl: received address with invalid scope, ignoring");
                 return 0;
         }
 
         r = sd_rtnl_message_addr_get_flags(message, &address->flags);
         if (r < 0) {
-                log_warning_link(link,
+                log_link_warning(link,
                                  "rtnl: received address with invalid flags, ignoring");
                 return 0;
         }
@@ -1372,7 +1470,7 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
                 r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL,
                                                  &address->in_addr.in);
                 if (r < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "rtnl: received address without valid address, ignoring");
                         return 0;
                 }
@@ -1383,7 +1481,7 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
                 r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS,
                                                   &address->in_addr.in6);
                 if (r < 0) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "rtnl: received address without valid address, ignoring");
                         return 0;
                 }
@@ -1396,7 +1494,7 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
 
         if (!inet_ntop(address->family, &address->in_addr, buf,
                        INET6_ADDRSTRLEN)) {
-                log_warning_link(link, "could not print address");
+                log_link_warning(link, "could not print address");
                 return 0;
         }
 
@@ -1426,13 +1524,11 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
         switch (type) {
         case RTM_NEWADDR:
                 if (!address_dropped)
-                        log_debug_link(link, "added address: %s/%u (valid for %s)",
-                                       buf, address->prefixlen,
-                                       strna(valid_str));
+                        log_link_debug(link, "added address: %s/%u (valid for %s)",
+                                       buf, address->prefixlen, valid_str);
                 else
-                        log_debug_link(link, "updated address: %s/%u (valid for %s)",
-                                       buf, address->prefixlen,
-                                       strna(valid_str));
+                        log_link_debug(link, "updated address: %s/%u (valid for %s)",
+                                       buf, address->prefixlen, valid_str);
 
                 LIST_PREPEND(addresses, link->addresses, address);
                 address = NULL;
@@ -1442,16 +1538,14 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
                 break;
         case RTM_DELADDR:
                 if (address_dropped) {
-                        log_debug_link(link, "removed address: %s/%u (valid for %s)",
-                                       buf, address->prefixlen,
-                                       strna(valid_str));
+                        log_link_debug(link, "removed address: %s/%u (valid for %s)",
+                                       buf, address->prefixlen, valid_str);
 
                         link_save(link);
                 } else
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "removing non-existent address: %s/%u (valid for %s)",
-                                         buf, address->prefixlen,
-                                         strna(valid_str));
+                                         buf, address->prefixlen, valid_str);
 
                 break;
         default:
@@ -1463,7 +1557,6 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message,
 
 int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
         Link *link;
-        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
         _cleanup_udev_device_unref_ struct udev_device *device = NULL;
         char ifindex_str[2 + DECIMAL_STR_MAX(int)];
         int r;
@@ -1479,33 +1572,21 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 
         link = *ret;
 
-        log_debug_link(link, "link %d added", link->ifindex);
-
-        r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex,
-                                     0);
-        if (r < 0)
-                return r;
-
-        r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0,
-                               NULL);
-        if (r < 0)
-                return r;
-
-        link_ref(link);
+        log_link_debug(link, "link %d added", link->ifindex);
 
         if (detect_container(NULL) <= 0) {
                 /* not in a container, udev will be around */
                 sprintf(ifindex_str, "n%d", link->ifindex);
                 device = udev_device_new_from_device_id(m->udev, ifindex_str);
                 if (!device) {
-                        log_warning_link(link,
+                        log_link_warning(link,
                                          "could not find udev device: %m");
                         return -errno;
                 }
 
                 if (udev_device_get_is_initialized(device) <= 0) {
                         /* not yet ready */
-                        log_debug_link(link, "link pending udev initialization...");
+                        log_link_debug(link, "link pending udev initialization...");
                         return 0;
                 }
 
@@ -1537,13 +1618,13 @@ int link_update(Link *link, sd_rtnl_message *m) {
 
         if (link->state == LINK_STATE_LINGER) {
                 link_ref(link);
-                log_info_link(link, "link readded");
+                log_link_info(link, "link readded");
                 link->state = LINK_STATE_ENSLAVING;
         }
 
         r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
         if (r >= 0 && !streq(ifname, link->ifname)) {
-                log_info_link(link, "renamed to %s", ifname);
+                log_link_info(link, "renamed to %s", ifname);
 
                 free(link->ifname);
                 link->ifname = strdup(ifname);
@@ -1556,7 +1637,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                 link->mtu = mtu;
                 if (!link->original_mtu) {
                         link->original_mtu = mtu;
-                        log_debug_link(link, "saved original MTU: %"
+                        log_link_debug(link, "saved original MTU: %"
                                        PRIu32, link->original_mtu);
                 }
 
@@ -1564,7 +1645,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                         r = sd_dhcp_client_set_mtu(link->dhcp_client,
                                                    link->mtu);
                         if (r < 0) {
-                                log_warning_link(link,
+                                log_link_warning(link,
                                                  "Could not update MTU in DHCP client: %s",
                                                  strerror(-r));
                                 return r;
@@ -1582,7 +1663,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                         memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet,
                                ETH_ALEN);
 
-                        log_debug_link(link, "MAC address: "
+                        log_link_debug(link, "MAC address: "
                                        "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
                                        mac.ether_addr_octet[0],
                                        mac.ether_addr_octet[1],
@@ -1594,7 +1675,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                         if (link->ipv4ll) {
                                 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
                                 if (r < 0) {
-                                        log_warning_link(link,
+                                        log_link_warning(link,
                                                          "Could not update MAC address in IPv4LL client: %s",
                                                          strerror(-r));
                                         return r;
@@ -1603,9 +1684,11 @@ int link_update(Link *link, sd_rtnl_message *m) {
 
                         if (link->dhcp_client) {
                                 r = sd_dhcp_client_set_mac(link->dhcp_client,
-                                                           &link->mac);
+                                                           (const uint8_t *) &link->mac,
+                                                           sizeof (link->mac),
+                                                           ARPHRD_ETHER);
                                 if (r < 0) {
-                                        log_warning_link(link,
+                                        log_link_warning(link,
                                                          "Could not update MAC address in DHCP client: %s",
                                                          strerror(-r));
                                         return r;
@@ -1614,9 +1697,11 @@ int link_update(Link *link, sd_rtnl_message *m) {
 
                         if (link->dhcp6_client) {
                                 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
-                                                            &link->mac);
+                                                            (const uint8_t *) &link->mac,
+                                                            sizeof (link->mac),
+                                                            ARPHRD_ETHER);
                                 if (r < 0) {
-                                        log_warning_link(link,
+                                        log_link_warning(link,
                                                          "Could not update MAC address in DHCPv6 client: %s",
                                                          strerror(-r));
                                         return r;
@@ -1635,7 +1720,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
         carrier_lost = had_carrier && !link_has_carrier(link);
 
         if (carrier_gained) {
-                log_info_link(link, "gained carrier");
+                log_link_info(link, "gained carrier");
 
                 if (link->network) {
                         r = link_acquire_conf(link);
@@ -1645,7 +1730,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                         }
                 }
         } else if (carrier_lost) {
-                log_info_link(link, "lost carrier");
+                log_link_info(link, "lost carrier");
 
                 r = link_stop_clients(link);
                 if (r < 0) {
@@ -1735,6 +1820,8 @@ int link_save(Link *link) {
                 char **address, **domain;
                 bool space;
 
+                fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
+
                 fputs("DNS=", f);
                 space = false;
                 STRV_FOREACH(address, link->network->dns) {
@@ -1814,7 +1901,7 @@ int link_save(Link *link) {
         if (link->dhcp_lease) {
                 assert(link->network);
 
-                r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
+                r = sd_dhcp_lease_save(link->dhcp_lease, link->lease_file);
                 if (r < 0)
                         goto fail;
 
@@ -1835,7 +1922,7 @@ int link_save(Link *link) {
 
         return 0;
 fail:
-        log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r));
+        log_link_error(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r));
         unlink(link->state_file);
         unlink(temp_path);
         return r;