1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
4 #include <netinet/in.h>
6 #include <linux/if_arp.h>
7 #include <linux/if_link.h>
8 #include <linux/netdevice.h>
9 #include <sys/socket.h>
12 #include "alloc-util.h"
13 #include "arphrd-util.h"
18 #include "device-private.h"
19 #include "device-util.h"
20 #include "dhcp-lease-internal.h"
22 #include "ethtool-util.h"
23 #include "event-util.h"
26 #include "format-util.h"
28 #include "glyph-util.h"
29 #include "logarithm.h"
30 #include "missing_network.h"
31 #include "netlink-util.h"
32 #include "network-internal.h"
33 #include "networkd-address-label.h"
34 #include "networkd-address.h"
35 #include "networkd-bridge-fdb.h"
36 #include "networkd-bridge-mdb.h"
37 #include "networkd-bridge-vlan.h"
38 #include "networkd-can.h"
39 #include "networkd-dhcp-prefix-delegation.h"
40 #include "networkd-dhcp-server.h"
41 #include "networkd-dhcp4.h"
42 #include "networkd-dhcp6.h"
43 #include "networkd-ipv4acd.h"
44 #include "networkd-ipv4ll.h"
45 #include "networkd-ipv6-proxy-ndp.h"
46 #include "networkd-link-bus.h"
47 #include "networkd-link.h"
48 #include "networkd-lldp-tx.h"
49 #include "networkd-manager.h"
50 #include "networkd-ndisc.h"
51 #include "networkd-neighbor.h"
52 #include "networkd-nexthop.h"
53 #include "networkd-queue.h"
54 #include "networkd-radv.h"
55 #include "networkd-route-util.h"
56 #include "networkd-route.h"
57 #include "networkd-routing-policy-rule.h"
58 #include "networkd-setlink.h"
59 #include "networkd-sriov.h"
60 #include "networkd-state-file.h"
61 #include "networkd-sysctl.h"
62 #include "networkd-wifi.h"
64 #include "socket-util.h"
65 #include "stdio-util.h"
66 #include "string-table.h"
69 #include "tmpfile-util.h"
71 #include "udev-util.h"
74 bool link_ipv6_enabled(Link
*link
) {
77 if (!socket_ipv6_is_supported())
80 if (link
->iftype
== ARPHRD_CAN
)
86 if (link
->network
->bond
)
89 if (link_may_have_ipv6ll(link
, /* check_multicast = */ false))
92 if (network_has_static_ipv6_configurations(link
->network
))
98 bool link_has_ipv6_connectivity(Link
*link
) {
99 LinkAddressState ipv6_address_state
;
103 link_get_address_states(link
, NULL
, &ipv6_address_state
, NULL
);
105 switch (ipv6_address_state
) {
106 case LINK_ADDRESS_STATE_ROUTABLE
:
107 /* If the interface has a routable IPv6 address, then we assume yes. */
110 case LINK_ADDRESS_STATE_DEGRADED
:
111 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
112 * there is an IPv6 default gateway. */
113 return link_has_default_gateway(link
, AF_INET6
);
115 case LINK_ADDRESS_STATE_OFF
:
116 /* No IPv6 address. */
120 assert_not_reached();
124 static bool link_is_ready_to_configure_one(Link
*link
, bool allow_unmanaged
) {
127 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
, LINK_STATE_UNMANAGED
))
131 return allow_unmanaged
;
133 if (!link
->network
->configure_without_carrier
) {
134 if (link
->set_flags_messages
> 0)
137 if (!link_has_carrier(link
))
141 if (link
->set_link_messages
> 0)
144 if (!link
->activated
)
150 bool link_is_ready_to_configure(Link
*link
, bool allow_unmanaged
) {
151 return check_ready_for_all_sr_iov_ports(link
, allow_unmanaged
, link_is_ready_to_configure_one
);
154 void link_ntp_settings_clear(Link
*link
) {
155 link
->ntp
= strv_free(link
->ntp
);
158 void link_dns_settings_clear(Link
*link
) {
159 if (link
->n_dns
!= UINT_MAX
)
160 for (unsigned i
= 0; i
< link
->n_dns
; i
++)
161 in_addr_full_free(link
->dns
[i
]);
162 link
->dns
= mfree(link
->dns
);
163 link
->n_dns
= UINT_MAX
;
165 link
->search_domains
= ordered_set_free(link
->search_domains
);
166 link
->route_domains
= ordered_set_free(link
->route_domains
);
168 link
->dns_default_route
= -1;
169 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
170 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
171 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
172 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
174 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
177 static void link_free_engines(Link
*link
) {
181 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
183 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
184 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
185 link
->dhcp4_6rd_tunnel_name
= mfree(link
->dhcp4_6rd_tunnel_name
);
187 link
->lldp_rx
= sd_lldp_rx_unref(link
->lldp_rx
);
188 link
->lldp_tx
= sd_lldp_tx_unref(link
->lldp_tx
);
190 link
->ipv4acd_by_address
= hashmap_free(link
->ipv4acd_by_address
);
192 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
194 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
195 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
197 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
198 link
->ndisc_expire
= sd_event_source_disable_unref(link
->ndisc_expire
);
201 link
->radv
= sd_radv_unref(link
->radv
);
204 static Link
*link_free(Link
*link
) {
207 link_ntp_settings_clear(link
);
208 link_dns_settings_clear(link
);
210 link
->routes
= set_free(link
->routes
);
211 link
->neighbors
= set_free(link
->neighbors
);
212 link
->addresses
= set_free(link
->addresses
);
213 link
->qdiscs
= set_free(link
->qdiscs
);
214 link
->tclasses
= set_free(link
->tclasses
);
216 link
->dhcp_pd_prefixes
= set_free(link
->dhcp_pd_prefixes
);
218 link_free_engines(link
);
220 set_free(link
->sr_iov_virt_port_ifindices
);
222 strv_free(link
->alternative_names
);
225 free(link
->previous_ssid
);
228 unlink_and_free(link
->lease_file
);
229 unlink_and_free(link
->lldp_file
);
230 unlink_and_free(link
->state_file
);
232 sd_device_unref(link
->dev
);
233 netdev_unref(link
->netdev
);
235 hashmap_free(link
->bound_to_links
);
236 hashmap_free(link
->bound_by_links
);
238 set_free_with_destructor(link
->slaves
, link_unref
);
240 network_unref(link
->network
);
242 sd_event_source_disable_unref(link
->carrier_lost_timer
);
247 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
249 int link_get_by_index(Manager
*m
, int ifindex
, Link
**ret
) {
257 link
= hashmap_get(m
->links_by_index
, INT_TO_PTR(ifindex
));
266 int link_get_by_name(Manager
*m
, const char *ifname
, Link
**ret
) {
272 link
= hashmap_get(m
->links_by_name
, ifname
);
281 int link_get_by_hw_addr(Manager
*m
, const struct hw_addr_data
*hw_addr
, Link
**ret
) {
287 link
= hashmap_get(m
->links_by_hw_addr
, hw_addr
);
296 int link_get_master(Link
*link
, Link
**ret
) {
298 assert(link
->manager
);
301 if (link
->master_ifindex
<= 0 || link
->master_ifindex
== link
->ifindex
)
304 return link_get_by_index(link
->manager
, link
->master_ifindex
, ret
);
307 void link_set_state(Link
*link
, LinkState state
) {
310 if (link
->state
== state
)
313 log_link_debug(link
, "State changed: %s -> %s",
314 link_state_to_string(link
->state
),
315 link_state_to_string(state
));
319 link_send_changed(link
, "AdministrativeState", NULL
);
323 int link_stop_engines(Link
*link
, bool may_keep_dhcp
) {
327 assert(link
->manager
);
328 assert(link
->manager
->event
);
330 bool keep_dhcp
= may_keep_dhcp
&&
332 !link
->network
->dhcp_send_decline
&& /* IPv4 ACD for the DHCPv4 address is running. */
333 (link
->manager
->restarting
||
334 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
337 r
= sd_dhcp_client_stop(link
->dhcp_client
);
339 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop DHCPv4 client: %m"));
342 r
= sd_dhcp_server_stop(link
->dhcp_server
);
344 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop DHCPv4 server: %m"));
346 r
= sd_lldp_rx_stop(link
->lldp_rx
);
348 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop LLDP Rx: %m"));
350 r
= sd_lldp_tx_stop(link
->lldp_tx
);
352 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop LLDP Tx: %m"));
354 r
= sd_ipv4ll_stop(link
->ipv4ll
);
356 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop IPv4 link-local: %m"));
358 r
= ipv4acd_stop(link
);
360 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop IPv4 ACD client: %m"));
362 r
= sd_dhcp6_client_stop(link
->dhcp6_client
);
364 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop DHCPv6 client: %m"));
366 r
= dhcp_pd_remove(link
, /* only_marked = */ false);
368 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not remove DHCPv6 PD addresses and routes: %m"));
370 r
= ndisc_stop(link
);
372 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop IPv6 Router Discovery: %m"));
376 r
= sd_radv_stop(link
->radv
);
378 RET_GATHER(ret
, log_link_warning_errno(link
, r
, "Could not stop IPv6 Router Advertisement: %m"));
383 void link_enter_failed(Link
*link
) {
388 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
391 log_link_warning(link
, "Failed");
393 link_set_state(link
, LINK_STATE_FAILED
);
395 if (!ratelimit_below(&link
->automatic_reconfigure_ratelimit
)) {
396 log_link_warning(link
, "The interface entered the failed state frequently, refusing to reconfigure it automatically.");
400 log_link_info(link
, "Trying to reconfigure the interface.");
401 r
= link_reconfigure(link
, /* force = */ true);
403 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
410 (void) link_stop_engines(link
, /* may_keep_dhcp = */ false);
413 void link_check_ready(Link
*link
) {
418 if (link
->state
== LINK_STATE_CONFIGURED
)
421 if (link
->state
!= LINK_STATE_CONFIGURING
)
422 return (void) log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
425 return (void) log_link_debug(link
, "%s(): link is unmanaged.", __func__
);
427 if (!link
->tc_configured
)
428 return (void) log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
430 if (link
->set_link_messages
> 0)
431 return (void) log_link_debug(link
, "%s(): link layer is configuring.", __func__
);
433 if (!link
->activated
)
434 return (void) log_link_debug(link
, "%s(): link is not activated.", __func__
);
436 if (link
->iftype
== ARPHRD_CAN
)
437 /* let's shortcut things for CAN which doesn't need most of checks below. */
440 if (!link
->stacked_netdevs_created
)
441 return (void) log_link_debug(link
, "%s(): stacked netdevs are not created.", __func__
);
443 if (!link
->static_addresses_configured
)
444 return (void) log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
446 if (!link
->static_address_labels_configured
)
447 return (void) log_link_debug(link
, "%s(): static address labels are not configured.", __func__
);
449 if (!link
->static_bridge_fdb_configured
)
450 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
452 if (!link
->static_bridge_mdb_configured
)
453 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
455 if (!link
->static_ipv6_proxy_ndp_configured
)
456 return (void) log_link_debug(link
, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__
);
458 if (!link
->static_neighbors_configured
)
459 return (void) log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
461 if (!link
->static_nexthops_configured
)
462 return (void) log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
464 if (!link
->static_routes_configured
)
465 return (void) log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
467 if (!link
->static_routing_policy_rules_configured
)
468 return (void) log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
470 if (!link
->sr_iov_configured
)
471 return (void) log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
473 /* IPv6LL is assigned after the link gains its carrier. */
474 if (!link
->network
->configure_without_carrier
&&
475 link_ipv6ll_enabled(link
) &&
476 !in6_addr_is_set(&link
->ipv6ll_address
))
477 return (void) log_link_debug(link
, "%s(): IPv6LL is not configured yet.", __func__
);
479 /* All static addresses must be ready. */
480 bool has_static_address
= false;
481 SET_FOREACH(a
, link
->addresses
) {
482 if (a
->source
!= NETWORK_CONFIG_SOURCE_STATIC
)
484 if (!address_is_ready(a
))
485 return (void) log_link_debug(link
, "%s(): static address %s is not ready.", __func__
,
486 IN_ADDR_PREFIX_TO_STRING(a
->family
, &a
->in_addr
, a
->prefixlen
));
487 has_static_address
= true;
490 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
491 if (has_static_address
)
494 /* If no dynamic addressing protocol enabled, assume the interface is ready.
495 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
496 if (!link_ipv4ll_enabled(link
) && !link_dhcp4_enabled(link
) &&
497 !link_dhcp6_enabled(link
) && !link_dhcp_pd_is_enabled(link
) &&
498 (link
->network
->configure_without_carrier
|| !link_ipv6_accept_ra_enabled(link
)))
502 link_ipv4ll_enabled(link
) && link
->ipv4ll_address_configured
&&
503 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_IPV4LL
);
505 link_dhcp4_enabled(link
) && link
->dhcp4_configured
&&
506 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP4
);
508 link_dhcp6_enabled(link
) && link
->dhcp6_configured
&&
509 (!link
->network
->dhcp6_use_address
||
510 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP6
));
512 link_dhcp_pd_is_enabled(link
) && link
->dhcp_pd_configured
&&
513 (!link
->network
->dhcp_pd_assign
||
514 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP_PD
));
516 link_ipv6_accept_ra_enabled(link
) && link
->ndisc_configured
&&
517 (!link
->network
->ipv6_accept_ra_use_autonomous_prefix
||
518 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_NDISC
));
520 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
521 if (dhcp_pd_is_uplink(link
, link
, /* accept_auto = */ false)) {
522 if (link_dhcp4_enabled(link
) && link
->network
->dhcp_use_6rd
&&
523 sd_dhcp_lease_has_6rd(link
->dhcp_lease
)) {
525 return (void) log_link_debug(link
, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__
);
527 return (void) log_link_debug(link
, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__
);
530 if (link_dhcp6_enabled(link
) && link
->network
->dhcp6_use_pd_prefix
&&
531 sd_dhcp6_lease_has_pd_prefix(link
->dhcp6_lease
)) {
533 return (void) log_link_debug(link
, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__
);
535 return (void) log_link_debug(link
, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__
);
539 /* At least one dynamic addressing protocol is finished. */
540 if (!ipv4ll_ready
&& !dhcp4_ready
&& !dhcp6_ready
&& !dhcp_pd_ready
&& !ndisc_ready
)
541 return (void) log_link_debug(link
, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__
);
543 log_link_debug(link
, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
545 yes_no(ipv4ll_ready
),
548 yes_no(dhcp_pd_ready
),
549 yes_no(ndisc_ready
));
552 link_set_state(link
, LINK_STATE_CONFIGURED
);
555 static int link_request_static_configs(Link
*link
) {
559 assert(link
->network
);
560 assert(link
->state
!= _LINK_STATE_INVALID
);
562 r
= link_request_static_addresses(link
);
566 r
= link_request_static_address_labels(link
);
570 r
= link_request_static_bridge_fdb(link
);
574 r
= link_request_static_bridge_mdb(link
);
578 r
= link_request_static_ipv6_proxy_ndp_addresses(link
);
582 r
= link_request_static_neighbors(link
);
586 r
= link_request_static_nexthops(link
, false);
590 r
= link_request_static_routes(link
, false);
594 r
= link_request_static_routing_policy_rules(link
);
601 static int link_request_stacked_netdevs(Link
*link
) {
607 link
->stacked_netdevs_created
= false;
609 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
610 r
= link_request_stacked_netdev(link
, netdev
);
615 if (link
->create_stacked_netdev_messages
== 0) {
616 link
->stacked_netdevs_created
= true;
617 link_check_ready(link
);
623 static int link_acquire_dynamic_ipv6_conf(Link
*link
) {
628 r
= radv_start(link
);
630 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Advertisement engine: %m");
632 r
= ndisc_start(link
);
634 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Discovery: %m");
636 r
= dhcp6_start(link
);
638 return log_link_warning_errno(link
, r
, "Failed to start DHCPv6 client: %m");
643 static int link_acquire_dynamic_ipv4_conf(Link
*link
) {
647 assert(link
->manager
);
648 assert(link
->manager
->event
);
650 if (link
->dhcp_client
) {
651 r
= dhcp4_start(link
);
653 return log_link_warning_errno(link
, r
, "Failed to start DHCPv4 client: %m");
655 log_link_debug(link
, "Acquiring DHCPv4 lease.");
657 } else if (link
->ipv4ll
) {
658 if (in4_addr_is_set(&link
->network
->ipv4ll_start_address
)) {
659 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &link
->network
->ipv4ll_start_address
);
661 return log_link_warning_errno(link
, r
, "Could not set IPv4 link-local start address: %m");
664 r
= sd_ipv4ll_start(link
->ipv4ll
);
666 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
668 log_link_debug(link
, "Acquiring IPv4 link-local address.");
671 if (link
->dhcp_server
) {
672 r
= sd_dhcp_server_start(link
->dhcp_server
);
674 return log_link_warning_errno(link
, r
, "Could not start DHCP server: %m");
677 r
= ipv4acd_start(link
);
679 return log_link_warning_errno(link
, r
, "Could not start IPv4 ACD client: %m");
684 static int link_acquire_dynamic_conf(Link
*link
) {
688 assert(link
->network
);
690 r
= link_acquire_dynamic_ipv4_conf(link
);
694 if (in6_addr_is_set(&link
->ipv6ll_address
)) {
695 r
= link_acquire_dynamic_ipv6_conf(link
);
700 if (!link_radv_enabled(link
) || !link
->network
->dhcp_pd_announce
) {
701 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
702 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
703 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
704 * below will be called in radv_start(). */
705 r
= dhcp_request_prefix_delegation(link
);
707 return log_link_warning_errno(link
, r
, "Failed to request DHCP delegated subnet prefix: %m");
711 r
= sd_lldp_tx_start(link
->lldp_tx
);
713 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
717 r
= sd_lldp_rx_start(link
->lldp_rx
);
719 return log_link_warning_errno(link
, r
, "Failed to start LLDP client: %m");
725 int link_ipv6ll_gained(Link
*link
) {
730 log_link_info(link
, "Gained IPv6LL");
732 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
))
735 r
= link_acquire_dynamic_ipv6_conf(link
);
739 link_check_ready(link
);
743 int link_handle_bound_to_list(Link
*link
) {
744 bool required_up
= false;
745 bool link_is_up
= false;
750 /* If at least one interface in bound_to_links has carrier, then make this interface up.
751 * If all interfaces in bound_to_links do not, then make this interface down. */
753 if (hashmap_isempty(link
->bound_to_links
))
756 if (link
->flags
& IFF_UP
)
759 HASHMAP_FOREACH(l
, link
->bound_to_links
)
760 if (link_has_carrier(l
)) {
765 if (!required_up
&& link_is_up
)
766 return link_request_to_bring_up_or_down(link
, /* up = */ false);
767 if (required_up
&& !link_is_up
)
768 return link_request_to_bring_up_or_down(link
, /* up = */ true);
773 static int link_handle_bound_by_list(Link
*link
) {
779 /* Update up or down state of interfaces which depend on this interface's carrier state. */
781 if (hashmap_isempty(link
->bound_by_links
))
784 HASHMAP_FOREACH(l
, link
->bound_by_links
) {
785 r
= link_handle_bound_to_list(l
);
793 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
802 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
805 r
= hashmap_ensure_put(h
, NULL
, INT_TO_PTR(carrier
->ifindex
), carrier
);
814 static int link_new_bound_by_list(Link
*link
) {
820 assert(link
->manager
);
824 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
825 if (!carrier
->network
)
828 if (strv_isempty(carrier
->network
->bind_carrier
))
831 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
832 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
838 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
839 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
847 static int link_new_bound_to_list(Link
*link
) {
853 assert(link
->manager
);
858 if (strv_isempty(link
->network
->bind_carrier
))
863 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
864 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
865 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
871 HASHMAP_FOREACH(carrier
, link
->bound_to_links
) {
872 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
880 static void link_free_bound_to_list(Link
*link
) {
881 bool updated
= false;
886 while ((bound_to
= hashmap_steal_first(link
->bound_to_links
))) {
889 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
890 link_dirty(bound_to
);
897 static void link_free_bound_by_list(Link
*link
) {
898 bool updated
= false;
903 while ((bound_by
= hashmap_steal_first(link
->bound_by_links
))) {
906 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
907 link_dirty(bound_by
);
908 link_handle_bound_to_list(bound_by
);
916 static int link_append_to_master(Link
*link
) {
922 /* - The link may have no master.
923 * - RTM_NEWLINK message about master interface may not be received yet. */
924 if (link_get_master(link
, &master
) < 0)
927 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
935 static void link_drop_from_master(Link
*link
) {
943 if (link_get_master(link
, &master
) < 0)
946 link_unref(set_remove(master
->slaves
, link
));
949 static int link_drop_requests(Link
*link
) {
954 assert(link
->manager
);
956 ORDERED_SET_FOREACH(req
, link
->manager
->request_queue
) {
957 if (req
->link
!= link
)
960 /* If the request is already called, but its reply is not received, then we need to
961 * drop the configuration (e.g. address) here. Note, if the configuration is known,
962 * it will be handled later by link_drop_foreign_addresses() or so. */
963 if (req
->waiting_reply
&& link
->state
!= LINK_STATE_LINGER
)
965 case REQUEST_TYPE_ADDRESS
: {
966 Address
*address
= ASSERT_PTR(req
->userdata
);
968 if (address_get(link
, address
, NULL
) < 0)
969 RET_GATHER(ret
, address_remove(address
, link
));
972 case REQUEST_TYPE_NEIGHBOR
: {
973 Neighbor
*neighbor
= ASSERT_PTR(req
->userdata
);
975 if (neighbor_get(link
, neighbor
, NULL
) < 0)
976 RET_GATHER(ret
, neighbor_remove(neighbor
, link
));
979 case REQUEST_TYPE_NEXTHOP
: {
980 NextHop
*nexthop
= ASSERT_PTR(req
->userdata
);
982 if (nexthop_get_by_id(link
->manager
, nexthop
->id
, NULL
) < 0)
983 RET_GATHER(ret
, nexthop_remove(nexthop
, link
->manager
));
996 static Link
*link_drop(Link
*link
) {
1000 assert(link
->manager
);
1002 link_set_state(link
, LINK_STATE_LINGER
);
1004 /* Drop all references from other links and manager. Note that async netlink calls may have
1005 * references to the link, and they will be dropped when we receive replies. */
1007 (void) link_drop_requests(link
);
1009 link_free_bound_to_list(link
);
1010 link_free_bound_by_list(link
);
1012 link_clear_sr_iov_ifindices(link
);
1014 link_drop_from_master(link
);
1016 if (link
->state_file
)
1017 (void) unlink(link
->state_file
);
1021 STRV_FOREACH(n
, link
->alternative_names
)
1022 hashmap_remove(link
->manager
->links_by_name
, *n
);
1023 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
1025 /* bonding master and its slaves have the same hardware address. */
1026 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
1028 /* The following must be called at last. */
1029 assert_se(hashmap_remove(link
->manager
->links_by_index
, INT_TO_PTR(link
->ifindex
)) == link
);
1030 return link_unref(link
);
1033 static int link_drop_foreign_config(Link
*link
) {
1037 assert(link
->manager
);
1039 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
1040 * to remove loopback address or addresses used for root NFS. */
1042 if (IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
1044 if (FLAGS_SET(link
->flags
, IFF_LOOPBACK
))
1046 if (link
->network
->keep_configuration
== KEEP_CONFIGURATION_YES
)
1049 r
= link_drop_foreign_routes(link
);
1051 RET_GATHER(r
, link_drop_foreign_nexthops(link
));
1052 RET_GATHER(r
, link_drop_foreign_addresses(link
));
1053 RET_GATHER(r
, link_drop_foreign_neighbors(link
));
1054 RET_GATHER(r
, manager_drop_foreign_routing_policy_rules(link
->manager
));
1059 static int link_drop_managed_config(Link
*link
) {
1063 assert(link
->manager
);
1065 r
= link_drop_managed_routes(link
);
1067 RET_GATHER(r
, link_drop_managed_nexthops(link
));
1068 RET_GATHER(r
, link_drop_managed_addresses(link
));
1069 RET_GATHER(r
, link_drop_managed_neighbors(link
));
1070 RET_GATHER(r
, link_drop_managed_routing_policy_rules(link
));
1075 static void link_foreignize_config(Link
*link
) {
1077 assert(link
->manager
);
1079 link_foreignize_routes(link
);
1080 link_foreignize_nexthops(link
);
1081 link_foreignize_addresses(link
);
1082 link_foreignize_neighbors(link
);
1083 link_foreignize_routing_policy_rules(link
);
1086 static int link_configure(Link
*link
) {
1090 assert(link
->network
);
1091 assert(link
->state
== LINK_STATE_INITIALIZED
);
1093 link_set_state(link
, LINK_STATE_CONFIGURING
);
1095 r
= link_new_bound_to_list(link
);
1099 r
= link_request_traffic_control(link
);
1103 r
= link_configure_mtu(link
);
1107 if (link
->iftype
== ARPHRD_CAN
) {
1108 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1109 r
= link_request_to_set_can(link
);
1113 return link_request_to_activate(link
);
1116 r
= link_request_sr_iov_vfs(link
);
1120 r
= link_set_sysctl(link
);
1124 r
= link_request_to_set_mac(link
, /* allow_retry = */ true);
1128 r
= link_request_to_set_ipoib(link
);
1132 r
= link_request_to_set_flags(link
);
1136 r
= link_request_to_set_group(link
);
1140 r
= link_request_to_set_addrgen_mode(link
);
1144 r
= link_request_to_set_master(link
);
1148 r
= link_request_stacked_netdevs(link
);
1152 r
= link_request_to_set_bond(link
);
1156 r
= link_request_to_set_bridge(link
);
1160 r
= link_request_to_set_bridge_vlan(link
);
1164 r
= link_request_to_activate(link
);
1168 r
= ipv4ll_configure(link
);
1172 r
= link_request_dhcp4_client(link
);
1176 r
= link_request_dhcp6_client(link
);
1180 r
= link_request_ndisc(link
);
1184 r
= link_request_dhcp_server(link
);
1188 r
= link_request_radv(link
);
1192 r
= link_lldp_rx_configure(link
);
1196 r
= link_lldp_tx_configure(link
);
1200 r
= link_drop_foreign_config(link
);
1204 r
= link_request_static_configs(link
);
1208 if (!link_has_carrier(link
))
1211 return link_acquire_dynamic_conf(link
);
1214 static int link_get_network(Link
*link
, Network
**ret
) {
1219 assert(link
->manager
);
1222 ORDERED_HASHMAP_FOREACH(network
, link
->manager
->networks
) {
1225 r
= net_match_config(
1229 &link
->permanent_hw_addr
,
1234 link
->alternative_names
,
1243 if (network
->match
.ifname
&& link
->dev
) {
1244 uint8_t name_assign_type
= NET_NAME_UNKNOWN
;
1247 if (sd_device_get_sysattr_value(link
->dev
, "name_assign_type", &attr
) >= 0)
1248 (void) safe_atou8(attr
, &name_assign_type
);
1250 warn
= name_assign_type
== NET_NAME_ENUM
;
1253 log_link_full(link
, warn
? LOG_WARNING
: LOG_DEBUG
,
1254 "found matching network '%s'%s.",
1256 warn
? ", based on potentially unpredictable interface name" : "");
1258 if (network
->unmanaged
)
1268 int link_reconfigure_impl(Link
*link
, bool force
) {
1269 Network
*network
= NULL
;
1270 NetDev
*netdev
= NULL
;
1275 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
1278 r
= netdev_get(link
->manager
, link
->ifname
, &netdev
);
1279 if (r
< 0 && r
!= -ENOENT
)
1282 r
= link_get_network(link
, &network
);
1283 if (r
< 0 && r
!= -ENOENT
)
1286 if (link
->state
!= LINK_STATE_UNMANAGED
&& !network
)
1287 /* If link is in initialized state, then link->network is also NULL. */
1290 if (link
->network
== network
&& !force
)
1294 _cleanup_free_
char *joined
= strv_join(network
->dropins
, ", ");
1296 if (link
->state
== LINK_STATE_INITIALIZED
)
1297 log_link_info(link
, "Configuring with %s%s%s%s.",
1299 isempty(joined
) ? "" : " (dropins: ",
1301 isempty(joined
) ? "" : ")");
1303 log_link_info(link
, "Reconfiguring with %s%s%s%s.",
1305 isempty(joined
) ? "" : " (dropins: ",
1307 isempty(joined
) ? "" : ")");
1309 log_link_full(link
, link
->state
== LINK_STATE_INITIALIZED
? LOG_DEBUG
: LOG_INFO
,
1310 "Unmanaging interface.");
1312 /* Dropping old .network file */
1313 r
= link_stop_engines(link
, false);
1317 r
= link_drop_requests(link
);
1321 if (network
&& !force
&& network
->keep_configuration
!= KEEP_CONFIGURATION_YES
)
1322 /* When a new/updated .network file is assigned, first make all configs (addresses,
1323 * routes, and so on) foreign, and then drop unnecessary configs later by
1324 * link_drop_foreign_config() in link_configure().
1325 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1326 * here we need to drop the configs such as addresses, routes, and so on configured by
1327 * the previously assigned .network file. */
1328 link_foreignize_config(link
);
1330 /* Remove all managed configs. Note, foreign configs are removed in later by
1331 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1332 r
= link_drop_managed_config(link
);
1337 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1338 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1339 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1340 * map here, as it depends on .network files assigned to other links. */
1341 link_free_bound_to_list(link
);
1343 link_free_engines(link
);
1344 link
->network
= network_unref(link
->network
);
1346 netdev_unref(link
->netdev
);
1347 link
->netdev
= netdev_ref(netdev
);
1350 link_set_state(link
, LINK_STATE_UNMANAGED
);
1354 /* Then, apply new .network file */
1355 link
->network
= network_ref(network
);
1356 link_update_operstate(link
, true);
1359 link_set_state(link
, LINK_STATE_INITIALIZED
);
1360 link
->activated
= false;
1362 r
= link_configure(link
);
1369 static int link_reconfigure_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, bool force
) {
1374 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to update link state");
1378 r
= link_reconfigure_impl(link
, force
);
1380 link_enter_failed(link
);
1387 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1388 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ false);
1391 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1392 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ true);
1395 int link_reconfigure(Link
*link
, bool force
) {
1400 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1401 * the function from being called multiple times simultaneously, refuse to reconfigure the
1402 * interface in these cases. */
1403 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
, LINK_STATE_LINGER
))
1404 return 0; /* 0 means no-op. */
1406 r
= link_call_getlink(link
, force
? link_force_reconfigure_handler
: link_reconfigure_handler
);
1410 return 1; /* 1 means the interface will be reconfigured. */
1413 static int link_initialized_and_synced(Link
*link
) {
1417 assert(link
->manager
);
1419 if (link
->manager
->test_mode
) {
1420 log_link_debug(link
, "Running in test mode, refusing to enter initialized state.");
1421 link_set_state(link
, LINK_STATE_UNMANAGED
);
1425 if (link
->state
== LINK_STATE_PENDING
) {
1426 log_link_debug(link
, "Link state is up-to-date");
1427 link_set_state(link
, LINK_STATE_INITIALIZED
);
1429 r
= link_new_bound_by_list(link
);
1433 r
= link_handle_bound_by_list(link
);
1438 return link_reconfigure_impl(link
, /* force = */ false);
1441 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1444 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to wait for the interface to be initialized");
1448 r
= link_initialized_and_synced(link
);
1450 link_enter_failed(link
);
1455 static int link_initialized(Link
*link
, sd_device
*device
) {
1461 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1462 * or sysattrs) may be outdated. */
1463 device_unref_and_replace(link
->dev
, device
);
1465 if (link
->dhcp_client
) {
1466 r
= sd_dhcp_client_attach_device(link
->dhcp_client
, link
->dev
);
1468 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv4 client, ignoring: %m");
1471 if (link
->dhcp6_client
) {
1472 r
= sd_dhcp6_client_attach_device(link
->dhcp6_client
, link
->dev
);
1474 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv6 client, ignoring: %m");
1477 r
= link_set_sr_iov_ifindices(link
);
1479 log_link_warning_errno(link
, r
, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1481 if (link
->state
!= LINK_STATE_PENDING
)
1482 return link_reconfigure(link
, /* force = */ false);
1484 log_link_debug(link
, "udev initialized link");
1486 /* udev has initialized the link, but we don't know if we have yet
1487 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1488 * when it returns we know that the pending NEWLINKs have already been
1489 * processed and that we are up-to-date */
1491 return link_call_getlink(link
, link_initialized_handler
);
1494 static int link_check_initialized(Link
*link
) {
1495 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
1500 if (!udev_available())
1501 return link_initialized_and_synced(link
);
1503 /* udev should be around */
1504 r
= sd_device_new_from_ifindex(&device
, link
->ifindex
);
1506 log_link_debug_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
1510 r
= sd_device_get_is_initialized(device
);
1512 return log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
1515 log_link_debug(link
, "link pending udev initialization...");
1519 r
= device_is_renaming(device
);
1521 return log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
1523 log_link_debug(link
, "Interface is being renamed, pending initialization.");
1527 return link_initialized(link
, device
);
1530 int manager_udev_process_link(Manager
*m
, sd_device
*device
, sd_device_action_t action
) {
1538 r
= sd_device_get_ifindex(device
, &ifindex
);
1540 return log_device_debug_errno(device
, r
, "Failed to get ifindex: %m");
1542 r
= link_get_by_index(m
, ifindex
, &link
);
1544 /* This error is not critical, as the corresponding rtnl message may be received later. */
1545 log_device_debug_errno(device
, r
, "Failed to get link from ifindex %i, ignoring: %m", ifindex
);
1549 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1550 * object here. It will be removed only when rtnetlink says so. */
1551 if (action
== SD_DEVICE_REMOVE
) {
1552 link
->dev
= sd_device_unref(link
->dev
);
1556 r
= device_is_renaming(device
);
1558 return log_device_debug_errno(device
, r
, "Failed to determine if the device is renaming or not: %m");
1560 log_device_debug(device
, "Device is renaming, waiting for the interface to be renamed.");
1562 * What happens when a device is initialized, then soon renamed after that? When we detect
1563 * such, maybe we should cancel or postpone all queued requests for the interface. */
1567 r
= sd_device_get_property_value(device
, "ID_NET_MANAGED_BY", &s
);
1568 if (r
< 0 && r
!= -ENOENT
)
1569 log_device_debug_errno(device
, r
, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1570 if (r
>= 0 && !streq(s
, "io.systemd.Network")) {
1571 log_device_debug(device
, "Interface is requested to be managed by '%s', not managing the interface.", s
);
1572 link_set_state(link
, LINK_STATE_UNMANAGED
);
1576 r
= link_initialized(link
, device
);
1578 link_enter_failed(link
);
1583 static int link_carrier_gained(Link
*link
) {
1584 bool force_reconfigure
;
1589 r
= event_source_disable(link
->carrier_lost_timer
);
1591 log_link_warning_errno(link
, r
, "Failed to disable carrier lost timer, ignoring: %m");
1593 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1594 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1595 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1596 * restarted, and the correct network information will be gained.
1598 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1599 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1600 * already assigned to the interface (in that case, the .network file does not have the SSID=
1601 * setting in the [Match] section), and the interface is already being configured. Of course,
1602 * there may exist another .network file with higher priority and a matching SSID= setting. But
1603 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1605 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1606 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1607 force_reconfigure
= link
->previous_ssid
&& !streq_ptr(link
->previous_ssid
, link
->ssid
);
1608 link
->previous_ssid
= mfree(link
->previous_ssid
);
1610 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1611 * profile wants to match on it with SSID= in its [Match] section.
1613 if (IN_SET(link
->wlan_iftype
, NL80211_IFTYPE_AP
, NL80211_IFTYPE_P2P_GO
)) {
1614 r
= link_get_wlan_interface(link
);
1619 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1620 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1621 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1622 r
= link_reconfigure_impl(link
, force_reconfigure
);
1626 r
= link_handle_bound_by_list(link
);
1630 if (link
->iftype
== ARPHRD_CAN
)
1631 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1634 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
1635 r
= link_acquire_dynamic_conf(link
);
1639 r
= link_request_static_configs(link
);
1647 static int link_carrier_lost_impl(Link
*link
) {
1652 link
->previous_ssid
= mfree(link
->previous_ssid
);
1654 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1660 r
= link_stop_engines(link
, false);
1664 r
= link_drop_managed_config(link
);
1665 if (r
< 0 && ret
>= 0)
1671 static int link_carrier_lost_handler(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
1672 Link
*link
= ASSERT_PTR(userdata
);
1675 r
= link_carrier_lost_impl(link
);
1677 log_link_warning_errno(link
, r
, "Failed to process carrier lost event: %m");
1678 link_enter_failed(link
);
1684 static int link_carrier_lost(Link
*link
) {
1691 r
= link_handle_bound_by_list(link
);
1695 if (link
->iftype
== ARPHRD_CAN
)
1696 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1702 if (link
->network
->ignore_carrier_loss_set
)
1703 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1704 usec
= link
->network
->ignore_carrier_loss_usec
;
1706 else if (link
->network
->bond
&& link
->wlan_iftype
> 0)
1707 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1708 * carrier to be lost. See #19832. */
1709 usec
= 3 * USEC_PER_SEC
;
1711 else if (link
->network
->dhcp_use_mtu
&&
1713 sd_dhcp_lease_get_mtu(link
->dhcp_lease
, &dhcp_mtu
) >= 0 &&
1714 dhcp_mtu
!= link
->original_mtu
)
1715 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1716 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1717 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1718 usec
= 5 * USEC_PER_SEC
;
1721 /* Otherwise, use the implied default value. */
1722 usec
= link
->network
->ignore_carrier_loss_usec
;
1724 if (usec
== USEC_INFINITY
)
1728 return link_carrier_lost_impl(link
);
1730 return event_reset_time_relative(link
->manager
->event
,
1731 &link
->carrier_lost_timer
,
1735 link_carrier_lost_handler
,
1738 "link-carrier-loss",
1742 static int link_admin_state_up(Link
*link
) {
1747 /* This is called every time an interface admin state changes to up;
1748 * specifically, when IFF_UP flag changes from unset to set. */
1753 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_DOWN
) {
1754 log_link_info(link
, "Activation policy is \"always-down\", forcing link down.");
1755 return link_request_to_bring_up_or_down(link
, /* up = */ false);
1758 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1759 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1760 r
= link_set_ipv6_mtu(link
);
1762 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU, ignoring: %m");
1767 static int link_admin_state_down(Link
*link
) {
1773 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_UP
) {
1774 log_link_info(link
, "Activation policy is \"always-up\", forcing link up.");
1775 return link_request_to_bring_up_or_down(link
, /* up = */ true);
1781 static bool link_is_enslaved(Link
*link
) {
1782 if (link
->flags
& IFF_SLAVE
)
1785 if (link
->master_ifindex
> 0)
1791 void link_update_operstate(Link
*link
, bool also_update_master
) {
1792 LinkOperationalState operstate
;
1793 LinkCarrierState carrier_state
;
1794 LinkAddressState ipv4_address_state
, ipv6_address_state
, address_state
;
1795 LinkOnlineState online_state
;
1796 _cleanup_strv_free_
char **p
= NULL
;
1797 bool changed
= false;
1801 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
1802 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
1803 else if (link_has_carrier(link
)) {
1804 if (link_is_enslaved(link
))
1805 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
1807 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
1808 } else if (link
->flags
& IFF_UP
)
1809 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
1811 carrier_state
= LINK_CARRIER_STATE_OFF
;
1813 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
1816 SET_FOREACH(slave
, link
->slaves
) {
1817 link_update_operstate(slave
, false);
1819 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
1820 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
1824 link_get_address_states(link
, &ipv4_address_state
, &ipv6_address_state
, &address_state
);
1826 /* Mapping of address and carrier state vs operational state
1828 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1829 * ------------------------------------------------------------------------------
1830 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1831 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1832 * routable | off | no-carrier | dormant | routable | routable | routable
1835 if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1836 operstate
= LINK_OPERSTATE_ROUTABLE
;
1837 else if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_DEGRADED
)
1838 operstate
= LINK_OPERSTATE_DEGRADED
;
1839 else if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
1840 operstate
= (LinkOperationalState
) carrier_state
;
1841 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1842 operstate
= LINK_OPERSTATE_ROUTABLE
;
1843 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
1844 operstate
= LINK_OPERSTATE_DEGRADED
;
1846 operstate
= LINK_OPERSTATE_ENSLAVED
;
1848 /* Only determine online state for managed links with RequiredForOnline=yes */
1849 if (!link
->network
|| !link
->network
->required_for_online
)
1850 online_state
= _LINK_ONLINE_STATE_INVALID
;
1851 else if (operstate
< link
->network
->required_operstate_for_online
.min
||
1852 operstate
> link
->network
->required_operstate_for_online
.max
)
1853 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1855 AddressFamily required_family
= link
->network
->required_family_for_online
;
1856 bool needs_ipv4
= required_family
& ADDRESS_FAMILY_IPV4
;
1857 bool needs_ipv6
= required_family
& ADDRESS_FAMILY_IPV6
;
1859 /* The operational state is within the range required for online.
1860 * If a particular address family is also required, we might revert
1861 * to offline in the blocks below. */
1862 online_state
= LINK_ONLINE_STATE_ONLINE
;
1864 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_DEGRADED
) {
1865 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1866 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1867 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1868 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1871 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_ROUTABLE
) {
1872 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1873 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1874 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1875 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1879 if (link
->carrier_state
!= carrier_state
) {
1880 link
->carrier_state
= carrier_state
;
1882 if (strv_extend(&p
, "CarrierState") < 0)
1886 if (link
->address_state
!= address_state
) {
1887 link
->address_state
= address_state
;
1889 if (strv_extend(&p
, "AddressState") < 0)
1893 if (link
->ipv4_address_state
!= ipv4_address_state
) {
1894 link
->ipv4_address_state
= ipv4_address_state
;
1896 if (strv_extend(&p
, "IPv4AddressState") < 0)
1900 if (link
->ipv6_address_state
!= ipv6_address_state
) {
1901 link
->ipv6_address_state
= ipv6_address_state
;
1903 if (strv_extend(&p
, "IPv6AddressState") < 0)
1907 if (link
->operstate
!= operstate
) {
1908 link
->operstate
= operstate
;
1910 if (strv_extend(&p
, "OperationalState") < 0)
1914 if (link
->online_state
!= online_state
) {
1915 link
->online_state
= online_state
;
1917 if (strv_extend(&p
, "OnlineState") < 0)
1922 link_send_changed_strv(link
, p
);
1926 if (also_update_master
) {
1929 if (link_get_master(link
, &master
) >= 0)
1930 link_update_operstate(master
, true);
1934 #define FLAG_STRING(string, flag, old, new) \
1935 (((old ^ new) & flag) \
1936 ? ((old & flag) ? (" -" string) : (" +" string)) \
1939 static int link_update_flags(Link
*link
, sd_netlink_message
*message
) {
1940 bool link_was_admin_up
, had_carrier
;
1948 r
= sd_rtnl_message_link_get_flags(message
, &flags
);
1950 return log_link_debug_errno(link
, r
, "rtnl: failed to read link flags: %m");
1952 r
= sd_netlink_message_read_u8(message
, IFLA_OPERSTATE
, &operstate
);
1954 /* If we got a message without operstate, assume the state was unchanged. */
1955 operstate
= link
->kernel_operstate
;
1957 return log_link_debug_errno(link
, r
, "rtnl: failed to read operational state: %m");
1959 if (link
->flags
== flags
&& link
->kernel_operstate
== operstate
)
1962 if (link
->flags
!= flags
) {
1963 unsigned unknown_flags
, unknown_flags_added
, unknown_flags_removed
;
1965 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",
1966 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
1967 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
1968 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
1969 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
1970 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
1971 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
1972 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
1973 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
1974 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
1975 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
1976 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
1977 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
1978 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
1979 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
1980 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
1981 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
1982 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
1983 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
1984 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
1986 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
1987 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
1988 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
1989 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
1990 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
1991 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
1992 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
1993 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
1995 if (unknown_flags_added
)
1996 log_link_debug(link
, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added
);
1998 if (unknown_flags_removed
)
1999 log_link_debug(link
, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed
);
2002 link_was_admin_up
= link
->flags
& IFF_UP
;
2003 had_carrier
= link_has_carrier(link
);
2005 link
->flags
= flags
;
2006 link
->kernel_operstate
= operstate
;
2008 link_update_operstate(link
, true);
2010 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
2011 log_link_info(link
, "Link UP");
2013 r
= link_admin_state_up(link
);
2016 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
)) {
2017 log_link_info(link
, "Link DOWN");
2019 r
= link_admin_state_down(link
);
2024 if (!had_carrier
&& link_has_carrier(link
)) {
2025 log_link_info(link
, "Gained carrier");
2027 r
= link_carrier_gained(link
);
2030 } else if (had_carrier
&& !link_has_carrier(link
)) {
2031 log_link_info(link
, "Lost carrier");
2033 r
= link_carrier_lost(link
);
2041 static int link_update_master(Link
*link
, sd_netlink_message
*message
) {
2042 int master_ifindex
, r
;
2047 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t*) &master_ifindex
);
2051 return log_link_debug_errno(link
, r
, "rtnl: failed to read master ifindex: %m");
2053 if (master_ifindex
== link
->ifindex
)
2056 if (master_ifindex
!= link
->master_ifindex
) {
2057 if (link
->master_ifindex
== 0)
2058 log_link_debug(link
, "Attached to master interface: %i", master_ifindex
);
2059 else if (master_ifindex
== 0)
2060 log_link_debug(link
, "Detached from master interface: %i", link
->master_ifindex
);
2062 log_link_debug(link
, "Master interface changed: %i %s %i", link
->master_ifindex
,
2063 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), master_ifindex
);
2065 link_drop_from_master(link
);
2066 link
->master_ifindex
= master_ifindex
;
2069 r
= link_append_to_master(link
);
2071 return log_link_debug_errno(link
, r
, "Failed to append link to master: %m");
2076 static int link_update_driver(Link
*link
, sd_netlink_message
*message
) {
2080 assert(link
->manager
);
2083 /* Driver is already read. Assuming the driver is never changed. */
2084 if (link
->ethtool_driver_read
)
2087 /* When udevd is running, read the driver after the interface is initialized by udevd.
2088 * Otherwise, ethtool may not work correctly. See issue #22538.
2089 * When udevd is not running, read the value when the interface is detected. */
2090 if (udev_available() && !link
->dev
)
2093 link
->ethtool_driver_read
= true;
2095 r
= ethtool_get_driver(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
2097 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
2101 log_link_debug(link
, "Found driver: %s", strna(link
->driver
));
2103 if (streq_ptr(link
->driver
, "dsa")) {
2104 uint32_t dsa_master_ifindex
= 0;
2106 r
= sd_netlink_message_read_u32(message
, IFLA_LINK
, &dsa_master_ifindex
);
2107 if (r
< 0 && r
!= -ENODATA
)
2108 return log_link_debug_errno(link
, r
, "rtnl: failed to read ifindex of the DSA master interface: %m");
2110 if (dsa_master_ifindex
> INT_MAX
) {
2111 log_link_debug(link
, "rtnl: received too large DSA master ifindex (%"PRIu32
" > INT_MAX), ignoring.",
2112 dsa_master_ifindex
);
2113 dsa_master_ifindex
= 0;
2116 link
->dsa_master_ifindex
= (int) dsa_master_ifindex
;
2119 return 1; /* needs reconfigure */
2122 static int link_update_permanent_hardware_address_from_ethtool(Link
*link
, sd_netlink_message
*message
) {
2126 assert(link
->manager
);
2129 if (link
->ethtool_permanent_hw_addr_read
)
2132 /* When udevd is running, read the permanent hardware address after the interface is
2133 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2134 * When udevd is not running, read the value when the interface is detected. */
2135 if (udev_available() && !link
->dev
)
2138 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2139 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, NULL
);
2143 return log_link_debug_errno(link
, r
, "Failed to read IFLA_ADDRESS attribute: %m");
2145 link
->ethtool_permanent_hw_addr_read
= true;
2147 r
= ethtool_get_permanent_hw_addr(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->permanent_hw_addr
);
2149 log_link_debug_errno(link
, r
, "Permanent hardware address not found, continuing without: %m");
2154 static int link_update_permanent_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2158 assert(link
->manager
);
2161 if (link
->permanent_hw_addr
.length
> 0)
2164 r
= netlink_message_read_hw_addr(message
, IFLA_PERM_ADDRESS
, &link
->permanent_hw_addr
);
2167 return log_link_debug_errno(link
, r
, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2169 /* Fallback to ethtool for older kernels. */
2170 r
= link_update_permanent_hardware_address_from_ethtool(link
, message
);
2175 if (link
->permanent_hw_addr
.length
> 0)
2176 log_link_debug(link
, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link
->permanent_hw_addr
));
2178 return 1; /* needs reconfigure */
2181 static int link_update_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2182 struct hw_addr_data addr
;
2188 r
= netlink_message_read_hw_addr(message
, IFLA_BROADCAST
, &link
->bcast_addr
);
2189 if (r
< 0 && r
!= -ENODATA
)
2190 return log_link_debug_errno(link
, r
, "rtnl: failed to read broadcast address: %m");
2192 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, &addr
);
2196 return log_link_debug_errno(link
, r
, "rtnl: failed to read hardware address: %m");
2198 if (hw_addr_equal(&link
->hw_addr
, &addr
))
2201 if (link
->hw_addr
.length
== 0)
2202 log_link_debug(link
, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr
));
2204 log_link_debug(link
, "Hardware address is changed: %s %s %s",
2205 HW_ADDR_TO_STR(&link
->hw_addr
),
2206 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
),
2207 HW_ADDR_TO_STR(&addr
));
2209 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2212 link
->hw_addr
= addr
;
2214 if (!hw_addr_is_null(&link
->hw_addr
)) {
2215 r
= hashmap_ensure_put(&link
->manager
->links_by_hw_addr
, &hw_addr_hash_ops
, &link
->hw_addr
, link
);
2216 if (r
== -EEXIST
&& streq_ptr(link
->kind
, "bond"))
2217 /* bonding master and its slaves have the same hardware address. */
2218 r
= hashmap_replace(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2220 log_link_debug_errno(link
, r
, "Failed to manage link by its new hardware address, ignoring: %m");
2223 r
= ipv4acd_update_mac(link
);
2225 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4 ACD client: %m");
2227 r
= ipv4ll_update_mac(link
);
2229 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2231 r
= dhcp4_update_mac(link
);
2233 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2235 r
= dhcp6_update_mac(link
);
2237 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2239 r
= radv_update_mac(link
);
2241 return log_link_debug_errno(link
, r
, "Could not update MAC address for Router Advertisement: %m");
2243 if (link
->ndisc
&& link
->hw_addr
.length
== ETH_ALEN
) {
2244 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->hw_addr
.ether
);
2246 return log_link_debug_errno(link
, r
, "Could not update MAC for NDisc: %m");
2249 if (link
->lldp_rx
) {
2250 r
= sd_lldp_rx_set_filter_address(link
->lldp_rx
, &link
->hw_addr
.ether
);
2252 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Rx: %m");
2255 if (link
->lldp_tx
) {
2256 r
= sd_lldp_tx_set_hwaddr(link
->lldp_tx
, &link
->hw_addr
.ether
);
2258 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Tx: %m");
2261 return 1; /* needs reconfigure */
2264 static int link_update_mtu(Link
*link
, sd_netlink_message
*message
) {
2265 uint32_t mtu
, min_mtu
= 0, max_mtu
= UINT32_MAX
;
2271 r
= sd_netlink_message_read_u32(message
, IFLA_MTU
, &mtu
);
2275 return log_link_debug_errno(link
, r
, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2279 r
= sd_netlink_message_read_u32(message
, IFLA_MIN_MTU
, &min_mtu
);
2280 if (r
< 0 && r
!= -ENODATA
)
2281 return log_link_debug_errno(link
, r
, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2283 r
= sd_netlink_message_read_u32(message
, IFLA_MAX_MTU
, &max_mtu
);
2284 if (r
< 0 && r
!= -ENODATA
)
2285 return log_link_debug_errno(link
, r
, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2288 max_mtu
= UINT32_MAX
;
2290 link
->min_mtu
= min_mtu
;
2291 link
->max_mtu
= max_mtu
;
2293 if (link
->original_mtu
== 0) {
2294 link
->original_mtu
= mtu
;
2295 log_link_debug(link
, "Saved original MTU %" PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2296 link
->original_mtu
, link
->min_mtu
, link
->max_mtu
);
2299 if (link
->mtu
== mtu
)
2303 log_link_debug(link
, "MTU is changed: %"PRIu32
" %s %"PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2304 link
->mtu
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), mtu
,
2305 link
->min_mtu
, link
->max_mtu
);
2309 if (link
->dhcp_client
) {
2310 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
, link
->mtu
);
2312 return log_link_debug_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2316 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
2318 return log_link_debug_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
2324 static int link_update_alternative_names(Link
*link
, sd_netlink_message
*message
) {
2325 _cleanup_strv_free_
char **altnames
= NULL
;
2331 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &altnames
);
2333 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2334 * interface has no alternative name. */
2337 return log_link_debug_errno(link
, r
, "rtnl: failed to read alternative names: %m");
2339 if (strv_equal(altnames
, link
->alternative_names
))
2342 STRV_FOREACH(n
, link
->alternative_names
)
2343 hashmap_remove(link
->manager
->links_by_name
, *n
);
2345 strv_free_and_replace(link
->alternative_names
, altnames
);
2347 STRV_FOREACH(n
, link
->alternative_names
) {
2348 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, *n
, link
);
2350 return log_link_debug_errno(link
, r
, "Failed to manage link by its new alternative names: %m");
2353 return 1; /* needs reconfigure */
2356 static int link_update_name(Link
*link
, sd_netlink_message
*message
) {
2357 char ifname_from_index
[IF_NAMESIZE
];
2364 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
2369 return log_link_debug_errno(link
, r
, "Failed to read interface name in RTM_NEWLINK message: %m");
2371 if (streq(ifname
, link
->ifname
))
2374 r
= format_ifname(link
->ifindex
, ifname_from_index
);
2376 return log_link_debug_errno(link
, r
, "Could not get interface name for index %i.", link
->ifindex
);
2378 if (!streq(ifname
, ifname_from_index
)) {
2379 log_link_debug(link
, "New interface name '%s' received from the kernel does not correspond "
2380 "with the name currently configured on the actual interface '%s'. Ignoring.",
2381 ifname
, ifname_from_index
);
2385 log_link_info(link
, "Interface name change detected, renamed to %s.", ifname
);
2387 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
2389 r
= free_and_strdup(&link
->ifname
, ifname
);
2391 return log_oom_debug();
2393 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2395 return log_link_debug_errno(link
, r
, "Failed to manage link by its new name: %m");
2397 if (link
->dhcp_client
) {
2398 r
= sd_dhcp_client_set_ifname(link
->dhcp_client
, link
->ifname
);
2400 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP client: %m");
2403 if (link
->dhcp6_client
) {
2404 r
= sd_dhcp6_client_set_ifname(link
->dhcp6_client
, link
->ifname
);
2406 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP6 client: %m");
2410 r
= sd_ndisc_set_ifname(link
->ndisc
, link
->ifname
);
2412 return log_link_debug_errno(link
, r
, "Failed to update interface name in NDisc: %m");
2415 if (link
->dhcp_server
) {
2416 r
= sd_dhcp_server_set_ifname(link
->dhcp_server
, link
->ifname
);
2418 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP server: %m");
2422 r
= sd_radv_set_ifname(link
->radv
, link
->ifname
);
2424 return log_link_debug_errno(link
, r
, "Failed to update interface name in Router Advertisement: %m");
2427 if (link
->lldp_rx
) {
2428 r
= sd_lldp_rx_set_ifname(link
->lldp_rx
, link
->ifname
);
2430 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Rx: %m");
2433 if (link
->lldp_tx
) {
2434 r
= sd_lldp_tx_set_ifname(link
->lldp_tx
, link
->ifname
);
2436 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Tx: %m");
2440 r
= sd_ipv4ll_set_ifname(link
->ipv4ll
, link
->ifname
);
2442 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4LL client: %m");
2445 r
= ipv4acd_set_ifname(link
);
2447 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4ACD client: %m");
2449 return 1; /* needs reconfigure */
2452 static int link_update(Link
*link
, sd_netlink_message
*message
) {
2453 bool needs_reconfigure
= false;
2459 r
= link_update_name(link
, message
);
2462 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2464 r
= link_update_alternative_names(link
, message
);
2467 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2469 r
= link_update_mtu(link
, message
);
2473 r
= link_update_driver(link
, message
);
2476 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2478 r
= link_update_permanent_hardware_address(link
, message
);
2481 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2483 r
= link_update_hardware_address(link
, message
);
2486 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2488 r
= link_update_master(link
, message
);
2492 r
= link_update_ipv6ll_addrgen_mode(link
, message
);
2496 r
= link_update_flags(link
, message
);
2500 r
= link_update_bridge_vlan(link
, message
);
2504 return needs_reconfigure
;
2507 static Link
*link_drop_or_unref(Link
*link
) {
2511 return link_unref(link
);
2512 return link_drop(link
);
2515 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_drop_or_unref
);
2517 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
2518 _cleanup_free_
char *ifname
= NULL
, *kind
= NULL
, *state_file
= NULL
, *lease_file
= NULL
, *lldp_file
= NULL
;
2519 _cleanup_(link_drop_or_unrefp
) Link
*link
= NULL
;
2520 unsigned short iftype
;
2527 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2529 return log_debug_errno(r
, "rtnl: failed to read ifindex from link message: %m");
2530 else if (ifindex
<= 0)
2531 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "rtnl: received link message without valid ifindex.");
2533 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
2535 return log_debug_errno(r
, "rtnl: failed to read interface type from link message: %m");
2537 r
= sd_netlink_message_read_string_strdup(message
, IFLA_IFNAME
, &ifname
);
2539 return log_debug_errno(r
, "rtnl: failed to read interface name from link message: %m");
2541 /* check for link kind */
2542 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
2544 r
= sd_netlink_message_read_string_strdup(message
, IFLA_INFO_KIND
, &kind
);
2545 if (r
< 0 && r
!= -ENODATA
)
2546 return log_debug_errno(r
, "rtnl: failed to read interface kind from link message: %m");
2547 r
= sd_netlink_message_exit_container(message
);
2549 return log_debug_errno(r
, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2552 if (!manager
->test_mode
) {
2553 /* Do not update state files when running in test mode. */
2554 if (asprintf(&state_file
, "/run/systemd/netif/links/%d", ifindex
) < 0)
2555 return log_oom_debug();
2557 if (asprintf(&lease_file
, "/run/systemd/netif/leases/%d", ifindex
) < 0)
2558 return log_oom_debug();
2560 if (asprintf(&lldp_file
, "/run/systemd/netif/lldp/%d", ifindex
) < 0)
2561 return log_oom_debug();
2564 link
= new(Link
, 1);
2570 .state
= LINK_STATE_PENDING
,
2571 .online_state
= _LINK_ONLINE_STATE_INVALID
,
2572 .automatic_reconfigure_ratelimit
= (const RateLimit
) { .interval
= 10 * USEC_PER_SEC
, .burst
= 5 },
2575 .ifname
= TAKE_PTR(ifname
),
2576 .kind
= TAKE_PTR(kind
),
2578 .bridge_vlan_pvid
= UINT16_MAX
,
2580 .ipv6ll_address_gen_mode
= _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID
,
2582 .state_file
= TAKE_PTR(state_file
),
2583 .lease_file
= TAKE_PTR(lease_file
),
2584 .lldp_file
= TAKE_PTR(lldp_file
),
2587 .dns_default_route
= -1,
2588 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
2589 .mdns
= _RESOLVE_SUPPORT_INVALID
,
2590 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
2591 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
2594 r
= hashmap_ensure_put(&manager
->links_by_index
, NULL
, INT_TO_PTR(link
->ifindex
), link
);
2596 return log_link_debug_errno(link
, r
, "Failed to store link into manager: %m");
2598 link
->manager
= manager
;
2600 r
= hashmap_ensure_put(&manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2602 return log_link_debug_errno(link
, r
, "Failed to manage link by its interface name: %m");
2604 log_link_debug(link
, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2605 link
->ifindex
, strna(arphrd_to_name(link
->iftype
)), link
->iftype
, strna(link
->kind
));
2607 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2608 * message arrived too early. Request the wireless link information again.
2610 if (set_remove(manager
->new_wlan_ifindices
, INT_TO_PTR(link
->ifindex
))) {
2611 r
= link_get_wlan_interface(link
);
2613 log_link_warning_errno(link
, r
, "Failed to get wireless interface, ignoring: %m");
2616 *ret
= TAKE_PTR(link
);
2620 int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, Manager
*manager
) {
2622 NetDev
*netdev
= NULL
;
2631 if (sd_netlink_message_is_error(message
)) {
2632 r
= sd_netlink_message_get_errno(message
);
2634 log_message_warning_errno(message
, r
, "rtnl: Could not receive link message, ignoring");
2639 r
= sd_netlink_message_get_type(message
, &type
);
2641 log_warning_errno(r
, "rtnl: Could not get message type, ignoring: %m");
2643 } else if (!IN_SET(type
, RTM_NEWLINK
, RTM_DELLINK
)) {
2644 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type
);
2648 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2650 log_warning_errno(r
, "rtnl: Could not get ifindex from link message, ignoring: %m");
2652 } else if (ifindex
<= 0) {
2653 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex
);
2657 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
2659 log_warning_errno(r
, "rtnl: Received link message without ifname, ignoring: %m");
2663 (void) link_get_by_index(manager
, ifindex
, &link
);
2664 (void) netdev_get(manager
, name
, &netdev
);
2669 /* netdev exists, so make sure the ifindex matches */
2670 r
= netdev_set_ifindex(netdev
, message
);
2672 log_netdev_warning_errno(netdev
, r
, "Could not process new link message for netdev, ignoring: %m");
2678 /* link is new, so add it */
2679 r
= link_new(manager
, message
, &link
);
2681 log_warning_errno(r
, "Could not process new link message: %m");
2685 r
= link_update(link
, message
);
2687 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2688 link_enter_failed(link
);
2692 r
= link_check_initialized(link
);
2694 log_link_warning_errno(link
, r
, "Failed to check link is initialized: %m");
2695 link_enter_failed(link
);
2699 r
= link_update(link
, message
);
2701 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2702 link_enter_failed(link
);
2706 r
= link_reconfigure_impl(link
, /* force = */ false);
2708 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
2709 link_enter_failed(link
);
2718 netdev_drop(netdev
);
2722 assert_not_reached();
2728 int link_getlink_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, const char *error_msg
) {
2729 uint16_t message_type
;
2736 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2739 r
= sd_netlink_message_get_errno(m
);
2741 log_link_message_warning_errno(link
, m
, r
, error_msg
);
2742 link_enter_failed(link
);
2746 r
= sd_netlink_message_get_type(m
, &message_type
);
2748 log_link_debug_errno(link
, r
, "rtnl: failed to read link message type, ignoring: %m");
2751 if (message_type
!= RTM_NEWLINK
) {
2752 log_link_debug(link
, "rtnl: received invalid link message type, ignoring.");
2756 r
= link_update(link
, m
);
2758 link_enter_failed(link
);
2765 int link_call_getlink(Link
*link
, link_netlink_message_handler_t callback
) {
2766 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2770 assert(link
->manager
);
2771 assert(link
->manager
->rtnl
);
2774 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
, link
->ifindex
);
2778 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
,
2779 link_netlink_destroy_callback
, link
);
2787 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
2788 [LINK_STATE_PENDING
] = "pending",
2789 [LINK_STATE_INITIALIZED
] = "initialized",
2790 [LINK_STATE_CONFIGURING
] = "configuring",
2791 [LINK_STATE_CONFIGURED
] = "configured",
2792 [LINK_STATE_UNMANAGED
] = "unmanaged",
2793 [LINK_STATE_FAILED
] = "failed",
2794 [LINK_STATE_LINGER
] = "linger",
2797 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
2799 int link_flags_to_string_alloc(uint32_t flags
, char **ret
) {
2800 _cleanup_free_
char *str
= NULL
;
2801 static const char* map
[] = {
2802 [LOG2U(IFF_UP
)] = "up", /* interface is up. */
2803 [LOG2U(IFF_BROADCAST
)] = "broadcast", /* broadcast address valid. */
2804 [LOG2U(IFF_DEBUG
)] = "debug", /* turn on debugging. */
2805 [LOG2U(IFF_LOOPBACK
)] = "loopback", /* interface is a loopback net. */
2806 [LOG2U(IFF_POINTOPOINT
)] = "point-to-point", /* interface has p-p link. */
2807 [LOG2U(IFF_NOTRAILERS
)] = "no-trailers", /* avoid use of trailers. */
2808 [LOG2U(IFF_RUNNING
)] = "running", /* interface RFC2863 OPER_UP. */
2809 [LOG2U(IFF_NOARP
)] = "no-arp", /* no ARP protocol. */
2810 [LOG2U(IFF_PROMISC
)] = "promiscuous", /* receive all packets. */
2811 [LOG2U(IFF_ALLMULTI
)] = "all-multicast", /* receive all multicast packets. */
2812 [LOG2U(IFF_MASTER
)] = "master", /* master of a load balancer. */
2813 [LOG2U(IFF_SLAVE
)] = "slave", /* slave of a load balancer. */
2814 [LOG2U(IFF_MULTICAST
)] = "multicast", /* supports multicast. */
2815 [LOG2U(IFF_PORTSEL
)] = "portsel", /* can set media type. */
2816 [LOG2U(IFF_AUTOMEDIA
)] = "auto-media", /* auto media select active. */
2817 [LOG2U(IFF_DYNAMIC
)] = "dynamic", /* dialup device with changing addresses. */
2818 [LOG2U(IFF_LOWER_UP
)] = "lower-up", /* driver signals L1 up. */
2819 [LOG2U(IFF_DORMANT
)] = "dormant", /* driver signals dormant. */
2820 [LOG2U(IFF_ECHO
)] = "echo", /* echo sent packets. */
2825 for (size_t i
= 0; i
< ELEMENTSOF(map
); i
++)
2826 if (FLAGS_SET(flags
, 1 << i
) && map
[i
])
2827 if (!strextend_with_separator(&str
, ",", map
[i
]))
2830 *ret
= TAKE_PTR(str
);
2834 static const char * const kernel_operstate_table
[] = {
2835 [IF_OPER_UNKNOWN
] = "unknown",
2836 [IF_OPER_NOTPRESENT
] = "not-present",
2837 [IF_OPER_DOWN
] = "down",
2838 [IF_OPER_LOWERLAYERDOWN
] = "lower-layer-down",
2839 [IF_OPER_TESTING
] = "testing",
2840 [IF_OPER_DORMANT
] = "dormant",
2841 [IF_OPER_UP
] = "up",
2844 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate
, int);