X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-link.c;h=94683a54036b729eecfaca95986051a3a3e7aeb1;hp=82e517e78c2d07b3fb3c10385ff9d79331709c63;hb=a2ba62c719224a4b47751623ca5e8b0333f49721;hpb=e1ea665edac17d75fce01b72dadfa3211b60df2c

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 82e517e78..94683a540 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -21,8 +21,10 @@
 
 #include <netinet/ether.h>
 #include <linux/if.h>
+#include <unistd.h>
 
 #include "networkd.h"
+#include "networkd-netdev.h"
 #include "libudev-private.h"
 #include "udev-util.h"
 #include "util.h"
@@ -78,7 +80,7 @@ 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)
-                return r;
+                log_debug_link(link, "MAC address not found for new device, continuing without");
 
         r = asprintf(&link->state_file, "/run/systemd/netif/links/%"PRIu64,
                      link->ifindex);
@@ -106,8 +108,6 @@ static void link_free(Link *link) {
         if (!link)
                 return;
 
-        assert(link->manager);
-
         while ((address = link->addresses)) {
                 LIST_REMOVE(addresses, link->addresses, address);
                 address_free(address);
@@ -128,7 +128,8 @@ static void link_free(Link *link) {
         sd_dhcp6_client_unref(link->dhcp6_client);
         sd_icmp6_nd_unref(link->icmp6_router_discovery);
 
-        hashmap_remove(link->manager->links, &link->ifindex);
+        if (link->manager)
+                hashmap_remove(link->manager->links, &link->ifindex);
 
         free(link->ifname);
 
@@ -366,7 +367,7 @@ static int link_enter_configured(Link *link) {
 }
 
 static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(link->route_messages > 0);
@@ -376,10 +377,8 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         link->route_messages --;
 
-        if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
@@ -397,27 +396,23 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                 link_enter_configured(link);
         }
 
-        link_unref(link);
-
         return 1;
 }
 
 static int link_set_dhcp_routes(Link *link) {
         struct sd_dhcp_route *static_routes;
-        size_t static_routes_size;
-        int r;
-        unsigned i;
+        int r, n, i;
 
         assert(link);
 
-        r = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes, &static_routes_size);
-        if (r < 0) {
-                if (r != -ENOENT)
-                        log_warning_link(link, "DHCP error: %s", strerror(-r));
-                return r;
+        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
+        if (n < 0) {
+                if (n != -ENOENT)
+                        log_warning_link(link, "DHCP error: could not get routes: %s", strerror(-n));
+                return n;
         }
 
-        for (i = 0; i < static_routes_size; i++) {
+        for (i = 0; i < n; i++) {
                 _cleanup_route_free_ Route *route = NULL;
 
                 r = route_new_dynamic(&route);
@@ -431,7 +426,7 @@ static int link_set_dhcp_routes(Link *link) {
                 route->in_addr.in = static_routes[i].gw_addr;
                 route->dst_addr.in = static_routes[i].dst_addr;
                 route->dst_prefixlen = static_routes[i].dst_prefixlen;
-                route->metrics = DHCP_STATIC_ROUTE_METRIC;
+                route->metrics = DHCP_ROUTE_METRIC;
 
                 r = route_configure(route, link, &route_handler);
                 if (r < 0) {
@@ -440,7 +435,6 @@ static int link_set_dhcp_routes(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->route_messages ++;
         }
 
@@ -472,7 +466,6 @@ static int link_enter_set_routes(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->route_messages ++;
         }
 
@@ -497,7 +490,7 @@ static int link_enter_set_routes(Link *link) {
 
                         route->family = AF_INET;
                         route->scope = RT_SCOPE_LINK;
-                        route->metrics = 99;
+                        route->metrics = IPV4LL_ROUTE_METRIC;
 
                         r = route_configure(route, link, &route_handler);
                         if (r < 0) {
@@ -507,7 +500,6 @@ static int link_enter_set_routes(Link *link) {
                                 return r;
                         }
 
-                        link_ref(link);
                         link->route_messages ++;
                 }
         }
@@ -519,7 +511,8 @@ static int link_enter_set_routes(Link *link) {
 
                 r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
                 if (r < 0 && r != -ENOENT) {
-                        log_warning_link(link, "DHCP error: %s", strerror(-r));
+                        log_warning_link(link, "DHCP error: could not get gateway: %s",
+                                         strerror(-r));
                         return r;
                 }
 
@@ -545,6 +538,7 @@ static int link_enter_set_routes(Link *link) {
                         route_gw->dst_addr.in = gateway;
                         route_gw->dst_prefixlen = 32;
                         route_gw->scope = RT_SCOPE_LINK;
+                        route_gw->metrics = DHCP_ROUTE_METRIC;
 
                         r = route_configure(route_gw, link, &route_handler);
                         if (r < 0) {
@@ -553,11 +547,11 @@ static int link_enter_set_routes(Link *link) {
                                 return r;
                         }
 
-                        link_ref(link);
                         link->route_messages ++;
 
                         route->family = AF_INET;
                         route->in_addr.in = gateway;
+                        route->metrics = DHCP_ROUTE_METRIC;
 
                         r = route_configure(route, link, &route_handler);
                         if (r < 0) {
@@ -567,7 +561,6 @@ static int link_enter_set_routes(Link *link) {
                                 return r;
                         }
 
-                        link_ref(link);
                         link->route_messages ++;
                 }
 
@@ -583,17 +576,15 @@ static int link_enter_set_routes(Link *link) {
 }
 
 static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(m);
         assert(link);
         assert(link->ifname);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -ESRCH)
@@ -604,15 +595,38 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        link_unref(link);
+        return 1;
+}
 
-        return 0;
+static 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));
+        }
+
+        return 1;
 }
 
 static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
+        assert(rtnl);
         assert(m);
         assert(link);
         assert(link->ifname);
@@ -622,10 +636,8 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         link->addr_messages --;
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
@@ -635,14 +647,17 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                                 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);
+        }
 
         if (link->addr_messages == 0) {
                 log_debug_link(link, "addresses set");
                 link_enter_set_routes(link);
         }
 
-        link_unref(link);
-
         return 1;
 }
 
@@ -672,7 +687,6 @@ static int link_enter_set_addresses(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->addr_messages ++;
         }
 
@@ -708,7 +722,6 @@ static int link_enter_set_addresses(Link *link) {
                                 return r;
                         }
 
-                        link_ref(link);
                         link->addr_messages ++;
                 }
         }
@@ -759,7 +772,9 @@ static int link_enter_set_addresses(Link *link) {
                 address->prefixlen = prefixlen;
                 address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr;
 
-                r = address_configure(address, link, &address_handler);
+                /* use update rather than configure so that we will update the lifetime
+                   of an existing address if it has already been configured */
+                r = address_update(address, link, &address_handler);
                 if (r < 0) {
                         log_warning_link(link,
                                          "could not set addresses: %s", strerror(-r));
@@ -767,7 +782,6 @@ static int link_enter_set_addresses(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->addr_messages ++;
         }
 
@@ -775,17 +789,15 @@ static int link_enter_set_addresses(Link *link) {
 }
 
 static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(m);
         assert(link);
         assert(link->ifname);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -ENOENT)
@@ -796,23 +808,19 @@ static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userd
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        link_unref(link);
-
-        return 0;
+        return 1;
 }
 
 static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(m);
         assert(link);
         assert(link->ifname);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EADDRNOTAVAIL)
@@ -823,28 +831,22 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        link_unref(link);
-
-        return 0;
+        return 1;
 }
 
 static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(link);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_bus_message_get_errno(m);
         if (r < 0)
                 log_warning_link(link, "Could not set hostname: %s", strerror(-r));
 
-        link_unref(link);
-
         return 1;
 }
 
@@ -878,26 +880,26 @@ static int link_set_hostname(Link *link, const char *hostname) {
                 return r;
 
         r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0);
-        if (r < 0)
+        if (r < 0) {
                 log_error_link(link, "Could not set transient hostname: %s", strerror(-r));
+                return r;
+        }
 
         link_ref(link);
 
-        return r;
+        return 0;
 }
 
 static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(m);
         assert(link);
         assert(link->ifname);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0)
@@ -907,8 +909,6 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        link_unref(link);
-
         return 1;
 }
 
@@ -953,7 +953,6 @@ static int dhcp_lease_lost(Link *link) {
         struct in_addr netmask;
         struct in_addr gateway;
         unsigned prefixlen;
-        unsigned i;
         int r;
 
         assert(link);
@@ -963,11 +962,11 @@ static int dhcp_lease_lost(Link *link) {
 
         if (link->network->dhcp_routes) {
                 struct sd_dhcp_route *routes;
-                size_t routes_size;
+                int n, i;
 
-                r = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes, &routes_size);
-                if (r >= 0) {
-                        for (i = 0; i < routes_size; i++) {
+                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
+                if (n >= 0) {
+                        for (i = 0; i < n; i++) {
                                 _cleanup_route_free_ Route *route = NULL;
 
                                 r = route_new_dynamic(&route);
@@ -978,7 +977,6 @@ static int dhcp_lease_lost(Link *link) {
                                         route->dst_prefixlen = routes[i].dst_prefixlen;
 
                                         route_drop(route, link, &route_drop_handler);
-                                        link_ref(link);
                                 }
                         }
                 }
@@ -999,7 +997,6 @@ static int dhcp_lease_lost(Link *link) {
                                 route_gw->scope = RT_SCOPE_LINK;
 
                                 route_drop(route_gw, link, &route_drop_handler);
-                                link_ref(link);
                         }
 
                         r = route_new_dynamic(&route);
@@ -1008,7 +1005,6 @@ static int dhcp_lease_lost(Link *link) {
                                 route->in_addr.in = gateway;
 
                                 route_drop(route, link, &route_drop_handler);
-                                link_ref(link);
                         }
                 }
 
@@ -1021,7 +1017,6 @@ static int dhcp_lease_lost(Link *link) {
                 address->prefixlen = prefixlen;
 
                 address_drop(address, link, &address_drop_handler);
-                link_ref(link);
         }
 
         if (link->network->dhcp_mtu) {
@@ -1109,7 +1104,8 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
 
         r = sd_dhcp_lease_get_router(lease, &gateway);
         if (r < 0 && r != -ENOENT) {
-                log_warning_link(link, "DHCP error: %s", strerror(-r));
+                log_warning_link(link, "DHCP error: could not get gateway: %s",
+                                 strerror(-r));
                 return r;
         }
 
@@ -1250,7 +1246,7 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
                         break;
                 default:
                         if (event < 0)
-                                log_warning_link(link, "DHCP error: %s", strerror(-event));
+                                log_warning_link(link, "DHCP error: client failed: %s", strerror(-event));
                         else
                                 log_warning_link(link, "DHCP unknown event: %d", event);
                         break;
@@ -1287,7 +1283,6 @@ static int ipv4ll_address_update(Link *link, bool deprecate) {
                 address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
 
                 address_update(address, link, &address_update_handler);
-                link_ref(link);
         }
 
         return 0;
@@ -1320,7 +1315,6 @@ static int ipv4ll_address_lost(Link *link) {
                 address->scope = RT_SCOPE_LINK;
 
                 address_drop(address, link, &address_drop_handler);
-                link_ref(link);
 
                 r = route_new_dynamic(&route);
                 if (r < 0) {
@@ -1334,7 +1328,6 @@ static int ipv4ll_address_lost(Link *link) {
                 route->metrics = 99;
 
                 route_drop(route, link, &route_drop_handler);
-                link_ref(link);
         }
 
         return 0;
@@ -1679,15 +1672,13 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) {
 }
 
 static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(link);
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0) {
@@ -1701,8 +1692,6 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                                 NULL);
         }
 
-        link_unref(link);
-
         return 1;
 }
 
@@ -1741,13 +1730,15 @@ static int link_up(Link *link) {
         return 0;
 }
 
-static int link_enslaved(Link *link) {
+static int link_joined(Link *link) {
         int r;
 
         assert(link);
         assert(link->state == LINK_STATE_ENSLAVING);
         assert(link->network);
 
+        log_debug_link(link, "joined netdev");
+
         if (!(link->flags & IFF_UP)) {
                 r = link_up(link);
                 if (r < 0) {
@@ -1756,14 +1747,11 @@ static int link_enslaved(Link *link) {
                 }
         }
 
-        if ((link->network->dhcp == DHCP_SUPPORT_NONE) && !link->network->ipv4ll)
-                return link_enter_set_addresses(link);
-
-        return 0;
+        return link_enter_set_addresses(link);
 }
 
-static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
         int r;
 
         assert(link);
@@ -1773,35 +1761,28 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         link->enslaving --;
 
-        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
-                link_unref(link);
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
-        }
 
         r = sd_rtnl_message_get_errno(m);
-        if (r < 0) {
+        if (r < 0 && r != -EEXIST) {
                 log_struct_link(LOG_ERR, link,
-                                "MESSAGE=%-*s: could not enslave: %s",
+                                "MESSAGE=%-*s: could not join netdev: %s",
                                 IFNAMSIZ,
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
                                 NULL);
                 link_enter_failed(link);
-                link_unref(link);
                 return 1;
         }
 
-        log_debug_link(link, "enslaved");
-
-        if (link->enslaving == 0)
-                link_enslaved(link);
-
-        link_unref(link);
+        if (link->enslaving <= 0)
+                link_joined(link);
 
         return 1;
 }
 
-static int link_enter_enslave(Link *link) {
+static int link_enter_join_netdev(Link *link) {
         NetDev *vlan, *macvlan, *vxlan;
         Iterator i;
         int r;
@@ -1820,7 +1801,7 @@ static int link_enter_enslave(Link *link) {
             hashmap_isempty(link->network->vlans) &&
             hashmap_isempty(link->network->macvlans) &&
             hashmap_isempty(link->network->vxlans))
-                return link_enslaved(link);
+                return link_joined(link);
 
         if (link->network->bond) {
                 log_struct_link(LOG_DEBUG, link,
@@ -1830,10 +1811,10 @@ static int link_enter_enslave(Link *link) {
                                 NETDEV(link->network->bond),
                                 NULL);
 
-                r = netdev_enslave(link->network->bond, link, &enslave_handler);
+                r = netdev_join(link->network->bond, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bond->ifname, strerror(-r),
                                         NETDEV(link->network->bond),
@@ -1842,7 +1823,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -1854,10 +1834,10 @@ static int link_enter_enslave(Link *link) {
                                 NETDEV(link->network->bridge),
                                 NULL);
 
-                r = netdev_enslave(link->network->bridge, link, &enslave_handler);
+                r = netdev_join(link->network->bridge, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bridge->ifname, strerror(-r),
                                         NETDEV(link->network->bridge),
@@ -1866,7 +1846,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -1878,10 +1857,10 @@ static int link_enter_enslave(Link *link) {
                                 NETDEV(link->network->tunnel),
                                 NULL);
 
-                r = netdev_enslave(link->network->tunnel, link, &enslave_handler);
+                r = netdev_join(link->network->tunnel, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->tunnel->ifname, strerror(-r),
                                         NETDEV(link->network->tunnel),
@@ -1890,7 +1869,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -1900,10 +1878,10 @@ static int link_enter_enslave(Link *link) {
                                 IFNAMSIZ,
                                 link->ifname, vlan->ifname, NETDEV(vlan), NULL);
 
-                r = netdev_enslave(vlan, link, &enslave_handler);
+                r = netdev_join(vlan, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, vlan->ifname, strerror(-r),
                                         NETDEV(vlan), NULL);
@@ -1911,7 +1889,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -1921,10 +1898,10 @@ static int link_enter_enslave(Link *link) {
                                 IFNAMSIZ,
                                 link->ifname, macvlan->ifname, NETDEV(macvlan), NULL);
 
-                r = netdev_enslave(macvlan, link, &enslave_handler);
+                r = netdev_join(macvlan, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, macvlan->ifname, strerror(-r),
                                         NETDEV(macvlan), NULL);
@@ -1932,7 +1909,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -1942,10 +1918,10 @@ static int link_enter_enslave(Link *link) {
                                 IFNAMSIZ,
                                 link->ifname, vxlan->ifname, NETDEV(vxlan), NULL);
 
-                r = netdev_enslave(vxlan, link, &enslave_handler);
+                r = netdev_join(vxlan, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, vxlan->ifname, strerror(-r),
                                         NETDEV(vxlan), NULL);
@@ -1953,7 +1929,6 @@ static int link_enter_enslave(Link *link) {
                         return r;
                 }
 
-                link_ref(link);
                 link->enslaving ++;
         }
 
@@ -2020,11 +1995,16 @@ static int link_configure(Link *link) {
                 if (r < 0)
                         return r;
 
+                r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, link->network->dhcp_broadcast);
+                if (r < 0)
+                        return r;
+
                 if (link->network->dhcp_mtu) {
                         r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
                         if (r < 0)
                                 return r;
                 }
+
                 if (link->network->dhcp_routes) {
                         r = sd_dhcp_client_set_request_option(link->dhcp_client, DHCP_OPTION_STATIC_ROUTE);
                         if (r < 0)
@@ -2033,6 +2013,25 @@ static int link_configure(Link *link) {
                         if (r < 0)
                                 return r;
                 }
+
+                if (link->network->dhcp_sendhost) {
+                        _cleanup_free_ char *hostname = gethostname_malloc();
+                        if (!hostname)
+                                return -ENOMEM;
+
+                        if (!is_localhost(hostname)) {
+                                r = sd_dhcp_client_set_hostname(link->dhcp_client, hostname);
+                                if (r < 0)
+                                        return r;
+                        }
+                }
+
+                if (link->network->dhcp_vendor_class_identifier) {
+                        r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
+                                                                       link->network->dhcp_vendor_class_identifier);
+                        if (r < 0)
+                                return r;
+                }
         }
 
         if (link->network->dhcp_server) {
@@ -2077,11 +2076,11 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        return link_enter_enslave(link);
+        return link_enter_join_netdev(link);
 }
 
 static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
+        _cleanup_link_unref_ Link *link = userdata;
         Network *network;
         int r;
 
@@ -2090,14 +2089,14 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *
         assert(link->manager);
 
         if (link->state != LINK_STATE_INITIALIZING)
-                return 0;
+                return 1;
 
         log_debug_link(link, "link state is up-to-date");
 
         r = network_get(link->manager, link->udev_device, link->ifname, &link->mac, &network);
         if (r == -ENOENT) {
                 link_enter_unmanaged(link);
-                return 0;
+                return 1;
         } else if (r < 0)
                 return r;
 
@@ -2109,7 +2108,7 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *
         if (r < 0)
                 return r;
 
-        return 0;
+        return 1;
 }
 
 int link_initialized(Link *link, struct udev_device *device) {
@@ -2124,6 +2123,9 @@ int link_initialized(Link *link, struct udev_device *device) {
         if (link->state != LINK_STATE_INITIALIZING)
                 return 0;
 
+        if (link->udev_device)
+                return 0;
+
         log_debug_link(link, "udev initialized link");
 
         link->udev_device = udev_device_ref(device);
@@ -2141,6 +2143,8 @@ int link_initialized(Link *link, struct udev_device *device) {
         if (r < 0)
                 return r;
 
+        link_ref(link);
+
         return 0;
 }
 
@@ -2178,7 +2182,7 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
 
         r = address_new_dynamic(&address);
         if (r < 0)
-                return 0;
+                return r;
 
         r = sd_rtnl_message_addr_get_family(message, &address->family);
         if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
@@ -2242,7 +2246,10 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         case RTM_NEWADDR:
                 if (!address_dropped)
                         log_debug_link(link, "added address: %s/%u", buf,
-                                      address->prefixlen);
+                                       address->prefixlen);
+                else
+                        log_debug_link(link, "updated address: %s/%u", buf,
+                                       address->prefixlen);
 
                 LIST_PREPEND(addresses, link->addresses, address);
                 address = NULL;
@@ -2253,10 +2260,12 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         case RTM_DELADDR:
                 if (address_dropped) {
                         log_debug_link(link, "removed address: %s/%u", buf,
-                                      address->prefixlen);
+                                       address->prefixlen);
 
                         link_save(link);
-                }
+                } else
+                        log_warning_link(link, "removing non-existent address: %s/%u",
+                                         buf, address->prefixlen);
 
                 break;
         default:
@@ -2266,29 +2275,6 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         return 1;
 }
 
-static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        Link *link = userdata;
-        int r;
-
-        assert(rtnl);
-        assert(m);
-        assert(link);
-
-        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));
-        }
-
-        return 1;
-}
-
 int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
         Link *link;
         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
@@ -2317,6 +2303,8 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
         if (r < 0)
                 return r;
 
+        link_ref(link);
+
         if (detect_container(NULL) <= 0) {
                 /* not in a container, udev will be around */
                 sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
@@ -2336,6 +2324,9 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
                 if (r < 0)
                         return r;
         } else {
+                /* we are calling a callback directly, so must take a ref */
+                link_ref(link);
+
                 r = link_initialized_and_synced(m->rtnl, NULL, link);
                 if (r < 0)
                         return r;