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-identifier.h"
21 #include "dhcp-lease-internal.h"
23 #include "ethtool-util.h"
24 #include "event-util.h"
27 #include "format-util.h"
29 #include "glyph-util.h"
30 #include "logarithm.h"
31 #include "missing_network.h"
32 #include "netlink-util.h"
33 #include "network-internal.h"
34 #include "networkd-address-label.h"
35 #include "networkd-address.h"
36 #include "networkd-bridge-fdb.h"
37 #include "networkd-bridge-mdb.h"
38 #include "networkd-bridge-vlan.h"
39 #include "networkd-can.h"
40 #include "networkd-dhcp-prefix-delegation.h"
41 #include "networkd-dhcp-server.h"
42 #include "networkd-dhcp4.h"
43 #include "networkd-dhcp6.h"
44 #include "networkd-ipv4acd.h"
45 #include "networkd-ipv4ll.h"
46 #include "networkd-ipv6-proxy-ndp.h"
47 #include "networkd-link-bus.h"
48 #include "networkd-link.h"
49 #include "networkd-lldp-tx.h"
50 #include "networkd-manager.h"
51 #include "networkd-ndisc.h"
52 #include "networkd-neighbor.h"
53 #include "networkd-nexthop.h"
54 #include "networkd-queue.h"
55 #include "networkd-radv.h"
56 #include "networkd-route-util.h"
57 #include "networkd-route.h"
58 #include "networkd-routing-policy-rule.h"
59 #include "networkd-setlink.h"
60 #include "networkd-sriov.h"
61 #include "networkd-state-file.h"
62 #include "networkd-sysctl.h"
63 #include "networkd-wifi.h"
65 #include "socket-util.h"
66 #include "stdio-util.h"
67 #include "string-table.h"
70 #include "tmpfile-util.h"
72 #include "udev-util.h"
75 bool link_ipv6_enabled(Link
*link
) {
78 if (!socket_ipv6_is_supported())
81 if (link
->iftype
== ARPHRD_CAN
)
87 if (link
->network
->bond
)
90 if (link_may_have_ipv6ll(link
, /* check_multicast = */ false))
93 if (network_has_static_ipv6_configurations(link
->network
))
99 bool link_has_ipv6_connectivity(Link
*link
) {
100 LinkAddressState ipv6_address_state
;
104 link_get_address_states(link
, NULL
, &ipv6_address_state
, NULL
);
106 switch (ipv6_address_state
) {
107 case LINK_ADDRESS_STATE_ROUTABLE
:
108 /* If the interface has a routable IPv6 address, then we assume yes. */
111 case LINK_ADDRESS_STATE_DEGRADED
:
112 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
113 * there is an IPv6 default gateway. */
114 return link_has_default_gateway(link
, AF_INET6
);
116 case LINK_ADDRESS_STATE_OFF
:
117 /* No IPv6 address. */
121 assert_not_reached();
125 static bool link_is_ready_to_configure_one(Link
*link
, bool allow_unmanaged
) {
128 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
, LINK_STATE_UNMANAGED
))
132 return allow_unmanaged
;
134 if (!link
->network
->configure_without_carrier
) {
135 if (link
->set_flags_messages
> 0)
138 if (!link_has_carrier(link
))
142 if (link
->set_link_messages
> 0)
145 if (!link
->activated
)
151 bool link_is_ready_to_configure(Link
*link
, bool allow_unmanaged
) {
152 return check_ready_for_all_sr_iov_ports(link
, allow_unmanaged
, link_is_ready_to_configure_one
);
155 void link_ntp_settings_clear(Link
*link
) {
156 link
->ntp
= strv_free(link
->ntp
);
159 void link_dns_settings_clear(Link
*link
) {
160 if (link
->n_dns
!= UINT_MAX
)
161 for (unsigned i
= 0; i
< link
->n_dns
; i
++)
162 in_addr_full_free(link
->dns
[i
]);
163 link
->dns
= mfree(link
->dns
);
164 link
->n_dns
= UINT_MAX
;
166 link
->search_domains
= ordered_set_free(link
->search_domains
);
167 link
->route_domains
= ordered_set_free(link
->route_domains
);
169 link
->dns_default_route
= -1;
170 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
171 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
172 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
173 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
175 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
178 static void link_free_engines(Link
*link
) {
182 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
184 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
185 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
186 link
->dhcp4_6rd_tunnel_name
= mfree(link
->dhcp4_6rd_tunnel_name
);
188 link
->lldp_rx
= sd_lldp_rx_unref(link
->lldp_rx
);
189 link
->lldp_tx
= sd_lldp_tx_unref(link
->lldp_tx
);
191 link
->ipv4acd_by_address
= hashmap_free(link
->ipv4acd_by_address
);
193 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
195 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
196 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
198 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
199 link
->ndisc_expire
= sd_event_source_disable_unref(link
->ndisc_expire
);
202 link
->radv
= sd_radv_unref(link
->radv
);
205 static Link
*link_free(Link
*link
) {
208 link_ntp_settings_clear(link
);
209 link_dns_settings_clear(link
);
211 link
->routes
= set_free(link
->routes
);
212 link
->neighbors
= set_free(link
->neighbors
);
213 link
->addresses
= set_free(link
->addresses
);
214 link
->qdiscs
= set_free(link
->qdiscs
);
215 link
->tclasses
= set_free(link
->tclasses
);
217 link
->dhcp_pd_prefixes
= set_free(link
->dhcp_pd_prefixes
);
219 link_free_engines(link
);
221 set_free(link
->sr_iov_virt_port_ifindices
);
223 strv_free(link
->alternative_names
);
226 free(link
->previous_ssid
);
229 unlink_and_free(link
->lease_file
);
230 unlink_and_free(link
->lldp_file
);
231 unlink_and_free(link
->state_file
);
233 sd_device_unref(link
->dev
);
234 netdev_unref(link
->netdev
);
236 hashmap_free(link
->bound_to_links
);
237 hashmap_free(link
->bound_by_links
);
239 set_free_with_destructor(link
->slaves
, link_unref
);
241 network_unref(link
->network
);
243 sd_event_source_disable_unref(link
->carrier_lost_timer
);
248 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
250 int link_get_by_index(Manager
*m
, int ifindex
, Link
**ret
) {
258 link
= hashmap_get(m
->links_by_index
, INT_TO_PTR(ifindex
));
267 int link_get_by_name(Manager
*m
, const char *ifname
, Link
**ret
) {
273 link
= hashmap_get(m
->links_by_name
, ifname
);
282 int link_get_by_hw_addr(Manager
*m
, const struct hw_addr_data
*hw_addr
, Link
**ret
) {
288 link
= hashmap_get(m
->links_by_hw_addr
, hw_addr
);
297 int link_get_master(Link
*link
, Link
**ret
) {
299 assert(link
->manager
);
302 if (link
->master_ifindex
<= 0 || link
->master_ifindex
== link
->ifindex
)
305 return link_get_by_index(link
->manager
, link
->master_ifindex
, ret
);
308 void link_set_state(Link
*link
, LinkState state
) {
311 if (link
->state
== state
)
314 log_link_debug(link
, "State changed: %s -> %s",
315 link_state_to_string(link
->state
),
316 link_state_to_string(state
));
320 link_send_changed(link
, "AdministrativeState", NULL
);
324 int link_stop_engines(Link
*link
, bool may_keep_dhcp
) {
328 assert(link
->manager
);
329 assert(link
->manager
->event
);
331 bool keep_dhcp
= may_keep_dhcp
&&
333 !link
->network
->dhcp_send_decline
&& /* IPv4 ACD for the DHCPv4 address is running. */
334 (link
->manager
->restarting
||
335 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
338 k
= sd_dhcp_client_stop(link
->dhcp_client
);
340 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
343 k
= sd_dhcp_server_stop(link
->dhcp_server
);
345 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 server: %m");
347 k
= sd_lldp_rx_stop(link
->lldp_rx
);
349 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Rx: %m");
351 k
= sd_lldp_tx_stop(link
->lldp_tx
);
353 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Tx: %m");
355 k
= sd_ipv4ll_stop(link
->ipv4ll
);
357 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
359 k
= ipv4acd_stop(link
);
361 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
363 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
365 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
367 k
= dhcp_pd_remove(link
, /* only_marked = */ false);
369 r
= log_link_warning_errno(link
, k
, "Could not remove DHCPv6 PD addresses and routes: %m");
371 k
= ndisc_stop(link
);
373 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
377 k
= sd_radv_stop(link
->radv
);
379 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
384 void link_enter_failed(Link
*link
) {
387 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
390 log_link_warning(link
, "Failed");
392 link_set_state(link
, LINK_STATE_FAILED
);
394 (void) link_stop_engines(link
, false);
397 void link_check_ready(Link
*link
) {
402 if (link
->state
== LINK_STATE_CONFIGURED
)
405 if (link
->state
!= LINK_STATE_CONFIGURING
)
406 return (void) log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
409 return (void) log_link_debug(link
, "%s(): link is unmanaged.", __func__
);
411 if (!link
->tc_configured
)
412 return (void) log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
414 if (link
->set_link_messages
> 0)
415 return (void) log_link_debug(link
, "%s(): link layer is configuring.", __func__
);
417 if (!link
->activated
)
418 return (void) log_link_debug(link
, "%s(): link is not activated.", __func__
);
420 if (link
->iftype
== ARPHRD_CAN
) {
421 /* let's shortcut things for CAN which doesn't need most of checks below. */
422 link_set_state(link
, LINK_STATE_CONFIGURED
);
426 if (!link
->stacked_netdevs_created
)
427 return (void) log_link_debug(link
, "%s(): stacked netdevs are not created.", __func__
);
429 if (!link
->static_addresses_configured
)
430 return (void) log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
432 if (!link
->static_address_labels_configured
)
433 return (void) log_link_debug(link
, "%s(): static address labels are not configured.", __func__
);
435 if (!link
->static_bridge_fdb_configured
)
436 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
438 if (!link
->static_bridge_mdb_configured
)
439 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
441 if (!link
->static_ipv6_proxy_ndp_configured
)
442 return (void) log_link_debug(link
, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__
);
444 if (!link
->static_neighbors_configured
)
445 return (void) log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
447 if (!link
->static_nexthops_configured
)
448 return (void) log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
450 if (!link
->static_routes_configured
)
451 return (void) log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
453 if (!link
->static_routing_policy_rules_configured
)
454 return (void) log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
456 if (!link
->sr_iov_configured
)
457 return (void) log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
459 /* IPv6LL is assigned after the link gains its carrier. */
460 if (!link
->network
->configure_without_carrier
&&
461 link_ipv6ll_enabled(link
) &&
462 !in6_addr_is_set(&link
->ipv6ll_address
))
463 return (void) log_link_debug(link
, "%s(): IPv6LL is not configured yet.", __func__
);
465 /* All static addresses must be ready. */
466 bool has_static_address
= false;
467 SET_FOREACH(a
, link
->addresses
) {
468 if (a
->source
!= NETWORK_CONFIG_SOURCE_STATIC
)
470 if (!address_is_ready(a
))
471 return (void) log_link_debug(link
, "%s(): static address %s is not ready.", __func__
,
472 IN_ADDR_PREFIX_TO_STRING(a
->family
, &a
->in_addr
, a
->prefixlen
));
473 has_static_address
= true;
476 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
477 if (has_static_address
)
480 /* If no dynamic addressing protocol enabled, assume the interface is ready.
481 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
482 if (!link_ipv4ll_enabled(link
) && !link_dhcp4_enabled(link
) &&
483 !link_dhcp6_enabled(link
) && !link_dhcp_pd_is_enabled(link
) &&
484 (link
->network
->configure_without_carrier
|| !link_ipv6_accept_ra_enabled(link
)))
488 link_ipv4ll_enabled(link
) && link
->ipv4ll_address_configured
&&
489 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_IPV4LL
);
491 link_dhcp4_enabled(link
) && link
->dhcp4_configured
&&
492 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP4
);
494 link_dhcp6_enabled(link
) && link
->dhcp6_configured
&&
495 (!link
->network
->dhcp6_use_address
||
496 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP6
));
498 link_dhcp_pd_is_enabled(link
) && link
->dhcp_pd_configured
&&
499 (!link
->network
->dhcp_pd_assign
||
500 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP_PD
));
502 link_ipv6_accept_ra_enabled(link
) && link
->ndisc_configured
&&
503 (!link
->network
->ipv6_accept_ra_use_autonomous_prefix
||
504 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_NDISC
));
506 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
507 if (dhcp_pd_is_uplink(link
, link
, /* accept_auto = */ false)) {
508 if (link_dhcp4_enabled(link
) && link
->network
->dhcp_use_6rd
&&
509 sd_dhcp_lease_has_6rd(link
->dhcp_lease
)) {
511 return (void) log_link_debug(link
, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__
);
513 return (void) log_link_debug(link
, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__
);
516 if (link_dhcp6_enabled(link
) && link
->network
->dhcp6_use_pd_prefix
&&
517 sd_dhcp6_lease_has_pd_prefix(link
->dhcp6_lease
)) {
519 return (void) log_link_debug(link
, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__
);
521 return (void) log_link_debug(link
, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__
);
525 /* At least one dynamic addressing protocol is finished. */
526 if (!ipv4ll_ready
&& !dhcp4_ready
&& !dhcp6_ready
&& !dhcp_pd_ready
&& !ndisc_ready
)
527 return (void) log_link_debug(link
, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__
);
529 log_link_debug(link
, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
531 yes_no(ipv4ll_ready
),
534 yes_no(dhcp_pd_ready
),
535 yes_no(ndisc_ready
));
538 link_set_state(link
, LINK_STATE_CONFIGURED
);
541 static int link_request_static_configs(Link
*link
) {
545 assert(link
->network
);
546 assert(link
->state
!= _LINK_STATE_INVALID
);
548 r
= link_request_static_addresses(link
);
552 r
= link_request_static_address_labels(link
);
556 r
= link_request_static_bridge_fdb(link
);
560 r
= link_request_static_bridge_mdb(link
);
564 r
= link_request_static_ipv6_proxy_ndp_addresses(link
);
568 r
= link_request_static_neighbors(link
);
572 r
= link_request_static_nexthops(link
, false);
576 r
= link_request_static_routes(link
, false);
580 r
= link_request_static_routing_policy_rules(link
);
587 static int link_request_stacked_netdevs(Link
*link
) {
593 link
->stacked_netdevs_created
= false;
595 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
596 r
= link_request_stacked_netdev(link
, netdev
);
601 if (link
->create_stacked_netdev_messages
== 0) {
602 link
->stacked_netdevs_created
= true;
603 link_check_ready(link
);
609 static int link_acquire_dynamic_ipv6_conf(Link
*link
) {
614 r
= radv_start(link
);
616 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Advertisement engine: %m");
618 r
= ndisc_start(link
);
620 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Discovery: %m");
622 r
= dhcp6_start(link
);
624 return log_link_warning_errno(link
, r
, "Failed to start DHCPv6 client: %m");
629 static int link_acquire_dynamic_ipv4_conf(Link
*link
) {
633 assert(link
->manager
);
634 assert(link
->manager
->event
);
636 if (link
->dhcp_client
) {
637 r
= dhcp4_start(link
);
639 return log_link_warning_errno(link
, r
, "Failed to start DHCPv4 client: %m");
641 log_link_debug(link
, "Acquiring DHCPv4 lease.");
643 } else if (link
->ipv4ll
) {
644 if (in4_addr_is_set(&link
->network
->ipv4ll_start_address
)) {
645 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &link
->network
->ipv4ll_start_address
);
647 return log_link_warning_errno(link
, r
, "Could not set IPv4 link-local start address: %m");
650 r
= sd_ipv4ll_start(link
->ipv4ll
);
652 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
654 log_link_debug(link
, "Acquiring IPv4 link-local address.");
657 if (link
->dhcp_server
) {
658 r
= sd_dhcp_server_start(link
->dhcp_server
);
660 return log_link_warning_errno(link
, r
, "Could not start DHCP server: %m");
663 r
= ipv4acd_start(link
);
665 return log_link_warning_errno(link
, r
, "Could not start IPv4 ACD client: %m");
670 static int link_acquire_dynamic_conf(Link
*link
) {
674 assert(link
->network
);
676 r
= link_acquire_dynamic_ipv4_conf(link
);
680 if (in6_addr_is_set(&link
->ipv6ll_address
)) {
681 r
= link_acquire_dynamic_ipv6_conf(link
);
686 if (!link_radv_enabled(link
) || !link
->network
->dhcp_pd_announce
) {
687 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
688 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
689 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
690 * below will be called in radv_start(). */
691 r
= dhcp_request_prefix_delegation(link
);
693 return log_link_warning_errno(link
, r
, "Failed to request DHCP delegated subnet prefix: %m");
697 r
= sd_lldp_tx_start(link
->lldp_tx
);
699 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
703 r
= sd_lldp_rx_start(link
->lldp_rx
);
705 return log_link_warning_errno(link
, r
, "Failed to start LLDP client: %m");
711 int link_ipv6ll_gained(Link
*link
) {
716 log_link_info(link
, "Gained IPv6LL");
718 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
))
721 r
= link_acquire_dynamic_ipv6_conf(link
);
725 link_check_ready(link
);
729 int link_handle_bound_to_list(Link
*link
) {
730 bool required_up
= false;
731 bool link_is_up
= false;
736 /* If at least one interface in bound_to_links has carrier, then make this interface up.
737 * If all interfaces in bound_to_links do not, then make this interface down. */
739 if (hashmap_isempty(link
->bound_to_links
))
742 if (link
->flags
& IFF_UP
)
745 HASHMAP_FOREACH(l
, link
->bound_to_links
)
746 if (link_has_carrier(l
)) {
751 if (!required_up
&& link_is_up
)
752 return link_request_to_bring_up_or_down(link
, /* up = */ false);
753 if (required_up
&& !link_is_up
)
754 return link_request_to_bring_up_or_down(link
, /* up = */ true);
759 static int link_handle_bound_by_list(Link
*link
) {
765 /* Update up or down state of interfaces which depend on this interface's carrier state. */
767 if (hashmap_isempty(link
->bound_by_links
))
770 HASHMAP_FOREACH(l
, link
->bound_by_links
) {
771 r
= link_handle_bound_to_list(l
);
779 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
788 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
791 r
= hashmap_ensure_put(h
, NULL
, INT_TO_PTR(carrier
->ifindex
), carrier
);
800 static int link_new_bound_by_list(Link
*link
) {
806 assert(link
->manager
);
810 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
811 if (!carrier
->network
)
814 if (strv_isempty(carrier
->network
->bind_carrier
))
817 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
818 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
824 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
825 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
833 static int link_new_bound_to_list(Link
*link
) {
839 assert(link
->manager
);
844 if (strv_isempty(link
->network
->bind_carrier
))
849 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
850 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
851 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
857 HASHMAP_FOREACH(carrier
, link
->bound_to_links
) {
858 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
866 static void link_free_bound_to_list(Link
*link
) {
867 bool updated
= false;
872 while ((bound_to
= hashmap_steal_first(link
->bound_to_links
))) {
875 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
876 link_dirty(bound_to
);
883 static void link_free_bound_by_list(Link
*link
) {
884 bool updated
= false;
889 while ((bound_by
= hashmap_steal_first(link
->bound_by_links
))) {
892 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
893 link_dirty(bound_by
);
894 link_handle_bound_to_list(bound_by
);
902 static int link_append_to_master(Link
*link
) {
908 /* - The link may have no master.
909 * - RTM_NEWLINK message about master interface may not be received yet. */
910 if (link_get_master(link
, &master
) < 0)
913 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
921 static void link_drop_from_master(Link
*link
) {
929 if (link_get_master(link
, &master
) < 0)
932 link_unref(set_remove(master
->slaves
, link
));
935 static void link_drop_requests(Link
*link
) {
939 assert(link
->manager
);
941 ORDERED_SET_FOREACH(req
, link
->manager
->request_queue
)
942 if (req
->link
== link
)
943 request_detach(link
->manager
, req
);
946 static Link
*link_drop(Link
*link
) {
950 assert(link
->manager
);
952 link_set_state(link
, LINK_STATE_LINGER
);
954 /* Drop all references from other links and manager. Note that async netlink calls may have
955 * references to the link, and they will be dropped when we receive replies. */
957 link_drop_requests(link
);
959 link_free_bound_to_list(link
);
960 link_free_bound_by_list(link
);
962 link_clear_sr_iov_ifindices(link
);
964 link_drop_from_master(link
);
966 if (link
->state_file
)
967 (void) unlink(link
->state_file
);
971 STRV_FOREACH(n
, link
->alternative_names
)
972 hashmap_remove(link
->manager
->links_by_name
, *n
);
973 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
975 /* bonding master and its slaves have the same hardware address. */
976 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
978 /* The following must be called at last. */
979 assert_se(hashmap_remove(link
->manager
->links_by_index
, INT_TO_PTR(link
->ifindex
)) == link
);
980 return link_unref(link
);
983 static int link_drop_foreign_config(Link
*link
) {
987 assert(link
->manager
);
989 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
990 * to remove loopback address or addresses used for root NFS. */
992 if (IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
994 if (FLAGS_SET(link
->flags
, IFF_LOOPBACK
))
996 if (link
->network
->keep_configuration
== KEEP_CONFIGURATION_YES
)
999 r
= link_drop_foreign_routes(link
);
1001 RET_GATHER(r
, link_drop_foreign_nexthops(link
));
1002 RET_GATHER(r
, link_drop_foreign_addresses(link
));
1003 RET_GATHER(r
, link_drop_foreign_neighbors(link
));
1004 RET_GATHER(r
, manager_drop_foreign_routing_policy_rules(link
->manager
));
1009 static int link_drop_managed_config(Link
*link
) {
1013 assert(link
->manager
);
1015 r
= link_drop_managed_routes(link
);
1017 RET_GATHER(r
, link_drop_managed_nexthops(link
));
1018 RET_GATHER(r
, link_drop_managed_addresses(link
));
1019 RET_GATHER(r
, link_drop_managed_neighbors(link
));
1020 RET_GATHER(r
, link_drop_managed_routing_policy_rules(link
));
1025 static void link_foreignize_config(Link
*link
) {
1027 assert(link
->manager
);
1029 link_foreignize_routes(link
);
1030 link_foreignize_nexthops(link
);
1031 link_foreignize_addresses(link
);
1032 link_foreignize_neighbors(link
);
1033 link_foreignize_routing_policy_rules(link
);
1036 static int link_configure(Link
*link
) {
1040 assert(link
->network
);
1041 assert(link
->state
== LINK_STATE_INITIALIZED
);
1043 link_set_state(link
, LINK_STATE_CONFIGURING
);
1045 r
= link_new_bound_to_list(link
);
1049 r
= link_request_traffic_control(link
);
1053 r
= link_configure_mtu(link
);
1057 if (link
->iftype
== ARPHRD_CAN
) {
1058 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1059 r
= link_request_to_set_can(link
);
1063 return link_request_to_activate(link
);
1066 r
= link_request_sr_iov_vfs(link
);
1070 r
= link_set_sysctl(link
);
1074 r
= link_request_to_set_mac(link
, /* allow_retry = */ true);
1078 r
= link_request_to_set_ipoib(link
);
1082 r
= link_request_to_set_flags(link
);
1086 r
= link_request_to_set_group(link
);
1090 r
= link_request_to_set_addrgen_mode(link
);
1094 r
= link_request_to_set_master(link
);
1098 r
= link_request_stacked_netdevs(link
);
1102 r
= link_request_to_set_bond(link
);
1106 r
= link_request_to_set_bridge(link
);
1110 r
= link_request_to_set_bridge_vlan(link
);
1114 r
= link_request_to_activate(link
);
1118 r
= ipv4ll_configure(link
);
1122 r
= link_request_dhcp4_client(link
);
1126 r
= link_request_dhcp6_client(link
);
1130 r
= link_request_ndisc(link
);
1134 r
= link_request_dhcp_server(link
);
1138 r
= link_request_radv(link
);
1142 r
= link_lldp_rx_configure(link
);
1146 r
= link_lldp_tx_configure(link
);
1150 r
= link_drop_foreign_config(link
);
1154 r
= link_request_static_configs(link
);
1158 if (!link_has_carrier(link
))
1161 return link_acquire_dynamic_conf(link
);
1164 static int link_get_network(Link
*link
, Network
**ret
) {
1169 assert(link
->manager
);
1172 ORDERED_HASHMAP_FOREACH(network
, link
->manager
->networks
) {
1175 r
= net_match_config(
1179 &link
->permanent_hw_addr
,
1184 link
->alternative_names
,
1193 if (network
->match
.ifname
&& link
->dev
) {
1194 uint8_t name_assign_type
= NET_NAME_UNKNOWN
;
1197 if (sd_device_get_sysattr_value(link
->dev
, "name_assign_type", &attr
) >= 0)
1198 (void) safe_atou8(attr
, &name_assign_type
);
1200 warn
= name_assign_type
== NET_NAME_ENUM
;
1203 log_link_full(link
, warn
? LOG_WARNING
: LOG_DEBUG
,
1204 "found matching network '%s'%s.",
1206 warn
? ", based on potentially unpredictable interface name" : "");
1208 if (network
->unmanaged
)
1218 int link_reconfigure_impl(Link
*link
, bool force
) {
1219 Network
*network
= NULL
;
1220 NetDev
*netdev
= NULL
;
1225 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
1228 r
= netdev_get(link
->manager
, link
->ifname
, &netdev
);
1229 if (r
< 0 && r
!= -ENOENT
)
1232 r
= link_get_network(link
, &network
);
1233 if (r
< 0 && r
!= -ENOENT
)
1236 if (link
->state
!= LINK_STATE_UNMANAGED
&& !network
)
1237 /* If link is in initialized state, then link->network is also NULL. */
1240 if (link
->network
== network
&& !force
)
1244 if (link
->state
== LINK_STATE_INITIALIZED
)
1245 log_link_info(link
, "Configuring with %s.", network
->filename
);
1247 log_link_info(link
, "Reconfiguring with %s.", network
->filename
);
1249 log_link_full(link
, link
->state
== LINK_STATE_INITIALIZED
? LOG_DEBUG
: LOG_INFO
,
1250 "Unmanaging interface.");
1252 /* Dropping old .network file */
1253 r
= link_stop_engines(link
, false);
1257 link_drop_requests(link
);
1259 if (network
&& !force
&& network
->keep_configuration
!= KEEP_CONFIGURATION_YES
)
1260 /* When a new/updated .network file is assigned, first make all configs (addresses,
1261 * routes, and so on) foreign, and then drop unnecessary configs later by
1262 * link_drop_foreign_config() in link_configure().
1263 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1264 * here we need to drop the configs such as addresses, routes, and so on configured by
1265 * the previously assigned .network file. */
1266 link_foreignize_config(link
);
1268 /* Remove all managed configs. Note, foreign configs are removed in later by
1269 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1270 r
= link_drop_managed_config(link
);
1275 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1276 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1277 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1278 * map here, as it depends on .network files assigned to other links. */
1279 link_free_bound_to_list(link
);
1281 link_free_engines(link
);
1282 link
->network
= network_unref(link
->network
);
1284 netdev_unref(link
->netdev
);
1285 link
->netdev
= netdev_ref(netdev
);
1288 link_set_state(link
, LINK_STATE_UNMANAGED
);
1292 /* Then, apply new .network file */
1293 link
->network
= network_ref(network
);
1294 link_update_operstate(link
, true);
1297 link_set_state(link
, LINK_STATE_INITIALIZED
);
1298 link
->activated
= false;
1300 r
= link_configure(link
);
1307 static int link_reconfigure_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, bool force
) {
1312 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to update link state");
1316 r
= link_reconfigure_impl(link
, force
);
1318 link_enter_failed(link
);
1325 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1326 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ false);
1329 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1330 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ true);
1333 int link_reconfigure(Link
*link
, bool force
) {
1338 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1339 * the function from being called multiple times simultaneously, refuse to reconfigure the
1340 * interface in these cases. */
1341 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
, LINK_STATE_LINGER
))
1342 return 0; /* 0 means no-op. */
1344 r
= link_call_getlink(link
, force
? link_force_reconfigure_handler
: link_reconfigure_handler
);
1348 return 1; /* 1 means the interface will be reconfigured. */
1351 static int link_initialized_and_synced(Link
*link
) {
1355 assert(link
->manager
);
1357 if (link
->manager
->test_mode
) {
1358 log_link_debug(link
, "Running in test mode, refusing to enter initialized state.");
1359 link_set_state(link
, LINK_STATE_UNMANAGED
);
1363 if (link
->state
== LINK_STATE_PENDING
) {
1364 log_link_debug(link
, "Link state is up-to-date");
1365 link_set_state(link
, LINK_STATE_INITIALIZED
);
1367 r
= link_new_bound_by_list(link
);
1371 r
= link_handle_bound_by_list(link
);
1376 return link_reconfigure_impl(link
, /* force = */ false);
1379 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1382 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to wait for the interface to be initialized");
1386 r
= link_initialized_and_synced(link
);
1388 link_enter_failed(link
);
1393 static int link_initialized(Link
*link
, sd_device
*device
) {
1399 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1400 * or sysattrs) may be outdated. */
1401 device_unref_and_replace(link
->dev
, device
);
1403 if (link
->dhcp_client
) {
1404 r
= sd_dhcp_client_attach_device(link
->dhcp_client
, link
->dev
);
1406 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv4 client, ignoring: %m");
1409 if (link
->dhcp6_client
) {
1410 r
= sd_dhcp6_client_attach_device(link
->dhcp6_client
, link
->dev
);
1412 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv6 client, ignoring: %m");
1415 r
= link_set_sr_iov_ifindices(link
);
1417 log_link_warning_errno(link
, r
, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1419 if (link
->state
!= LINK_STATE_PENDING
)
1420 return link_reconfigure(link
, /* force = */ false);
1422 log_link_debug(link
, "udev initialized link");
1424 /* udev has initialized the link, but we don't know if we have yet
1425 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1426 * when it returns we know that the pending NEWLINKs have already been
1427 * processed and that we are up-to-date */
1429 return link_call_getlink(link
, link_initialized_handler
);
1432 static int link_check_initialized(Link
*link
) {
1433 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
1438 if (!udev_available())
1439 return link_initialized_and_synced(link
);
1441 /* udev should be around */
1442 r
= sd_device_new_from_ifindex(&device
, link
->ifindex
);
1444 log_link_debug_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
1448 r
= sd_device_get_is_initialized(device
);
1450 return log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
1453 log_link_debug(link
, "link pending udev initialization...");
1457 r
= device_is_renaming(device
);
1459 return log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
1461 log_link_debug(link
, "Interface is being renamed, pending initialization.");
1465 return link_initialized(link
, device
);
1468 int manager_udev_process_link(Manager
*m
, sd_device
*device
, sd_device_action_t action
) {
1476 r
= sd_device_get_ifindex(device
, &ifindex
);
1478 return log_device_debug_errno(device
, r
, "Failed to get ifindex: %m");
1480 r
= link_get_by_index(m
, ifindex
, &link
);
1482 /* This error is not critical, as the corresponding rtnl message may be received later. */
1483 log_device_debug_errno(device
, r
, "Failed to get link from ifindex %i, ignoring: %m", ifindex
);
1487 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1488 * object here. It will be removed only when rtnetlink says so. */
1489 if (action
== SD_DEVICE_REMOVE
) {
1490 link
->dev
= sd_device_unref(link
->dev
);
1494 r
= device_is_renaming(device
);
1496 return log_device_debug_errno(device
, r
, "Failed to determine if the device is renaming or not: %m");
1498 log_device_debug(device
, "Device is renaming, waiting for the interface to be renamed.");
1500 * What happens when a device is initialized, then soon renamed after that? When we detect
1501 * such, maybe we should cancel or postpone all queued requests for the interface. */
1505 r
= sd_device_get_property_value(device
, "ID_NET_MANAGED_BY", &s
);
1506 if (r
< 0 && r
!= -ENOENT
)
1507 log_device_debug_errno(device
, r
, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1508 if (r
>= 0 && !streq(s
, "io.systemd.Network")) {
1509 log_device_debug(device
, "Interface is requested to be managed by '%s', not managing the interface.", s
);
1510 link_set_state(link
, LINK_STATE_UNMANAGED
);
1514 r
= link_initialized(link
, device
);
1516 link_enter_failed(link
);
1521 static int link_carrier_gained(Link
*link
) {
1522 bool force_reconfigure
;
1527 r
= event_source_disable(link
->carrier_lost_timer
);
1529 log_link_warning_errno(link
, r
, "Failed to disable carrier lost timer, ignoring: %m");
1531 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1532 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1533 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1534 * restarted, and the correct network information will be gained.
1536 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1537 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1538 * already assigned to the interface (in that case, the .network file does not have the SSID=
1539 * setting in the [Match] section), and the interface is already being configured. Of course,
1540 * there may exist another .network file with higher priority and a matching SSID= setting. But
1541 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1543 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1544 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1545 force_reconfigure
= link
->previous_ssid
&& !streq_ptr(link
->previous_ssid
, link
->ssid
);
1546 link
->previous_ssid
= mfree(link
->previous_ssid
);
1548 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1549 * profile wants to match on it with SSID= in its [Match] section.
1551 if (IN_SET(link
->wlan_iftype
, NL80211_IFTYPE_AP
, NL80211_IFTYPE_P2P_GO
)) {
1552 r
= link_get_wlan_interface(link
);
1557 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1558 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1559 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1560 r
= link_reconfigure_impl(link
, force_reconfigure
);
1564 r
= link_handle_bound_by_list(link
);
1568 if (link
->iftype
== ARPHRD_CAN
)
1569 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1572 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
1573 r
= link_acquire_dynamic_conf(link
);
1577 r
= link_request_static_configs(link
);
1585 static int link_carrier_lost_impl(Link
*link
) {
1590 link
->previous_ssid
= mfree(link
->previous_ssid
);
1592 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1598 r
= link_stop_engines(link
, false);
1602 r
= link_drop_managed_config(link
);
1603 if (r
< 0 && ret
>= 0)
1609 static int link_carrier_lost_handler(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
1610 Link
*link
= ASSERT_PTR(userdata
);
1613 r
= link_carrier_lost_impl(link
);
1615 log_link_warning_errno(link
, r
, "Failed to process carrier lost event: %m");
1616 link_enter_failed(link
);
1622 static int link_carrier_lost(Link
*link
) {
1629 r
= link_handle_bound_by_list(link
);
1633 if (link
->iftype
== ARPHRD_CAN
)
1634 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1640 if (link
->network
->ignore_carrier_loss_set
)
1641 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1642 usec
= link
->network
->ignore_carrier_loss_usec
;
1644 else if (link
->network
->bond
&& link
->wlan_iftype
> 0)
1645 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1646 * carrier to be lost. See #19832. */
1647 usec
= 3 * USEC_PER_SEC
;
1649 else if (link
->network
->dhcp_use_mtu
&&
1651 sd_dhcp_lease_get_mtu(link
->dhcp_lease
, &dhcp_mtu
) >= 0 &&
1652 dhcp_mtu
!= link
->original_mtu
)
1653 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1654 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1655 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1656 usec
= 5 * USEC_PER_SEC
;
1659 /* Otherwise, use the currently set value. */
1660 usec
= link
->network
->ignore_carrier_loss_usec
;
1662 if (usec
== USEC_INFINITY
)
1666 return link_carrier_lost_impl(link
);
1668 return event_reset_time_relative(link
->manager
->event
,
1669 &link
->carrier_lost_timer
,
1673 link_carrier_lost_handler
,
1676 "link-carrier-loss",
1680 static int link_admin_state_up(Link
*link
) {
1685 /* This is called every time an interface admin state changes to up;
1686 * specifically, when IFF_UP flag changes from unset to set. */
1691 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_DOWN
) {
1692 log_link_info(link
, "Activation policy is \"always-down\", forcing link down.");
1693 return link_request_to_bring_up_or_down(link
, /* up = */ false);
1696 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1697 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1698 r
= link_set_ipv6_mtu(link
);
1700 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU, ignoring: %m");
1705 static int link_admin_state_down(Link
*link
) {
1711 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_UP
) {
1712 log_link_info(link
, "Activation policy is \"always-up\", forcing link up.");
1713 return link_request_to_bring_up_or_down(link
, /* up = */ true);
1719 static bool link_is_enslaved(Link
*link
) {
1720 if (link
->flags
& IFF_SLAVE
)
1723 if (link
->master_ifindex
> 0)
1729 void link_update_operstate(Link
*link
, bool also_update_master
) {
1730 LinkOperationalState operstate
;
1731 LinkCarrierState carrier_state
;
1732 LinkAddressState ipv4_address_state
, ipv6_address_state
, address_state
;
1733 LinkOnlineState online_state
;
1734 _cleanup_strv_free_
char **p
= NULL
;
1735 bool changed
= false;
1739 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
1740 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
1741 else if (link_has_carrier(link
)) {
1742 if (link_is_enslaved(link
))
1743 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
1745 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
1746 } else if (link
->flags
& IFF_UP
)
1747 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
1749 carrier_state
= LINK_CARRIER_STATE_OFF
;
1751 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
1754 SET_FOREACH(slave
, link
->slaves
) {
1755 link_update_operstate(slave
, false);
1757 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
1758 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
1762 link_get_address_states(link
, &ipv4_address_state
, &ipv6_address_state
, &address_state
);
1764 /* Mapping of address and carrier state vs operational state
1766 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1767 * ------------------------------------------------------------------------------
1768 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1769 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1770 * routable | off | no-carrier | dormant | routable | routable | routable
1773 if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1774 operstate
= LINK_OPERSTATE_ROUTABLE
;
1775 else if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_DEGRADED
)
1776 operstate
= LINK_OPERSTATE_DEGRADED
;
1777 else if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
1778 operstate
= (LinkOperationalState
) carrier_state
;
1779 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1780 operstate
= LINK_OPERSTATE_ROUTABLE
;
1781 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
1782 operstate
= LINK_OPERSTATE_DEGRADED
;
1784 operstate
= LINK_OPERSTATE_ENSLAVED
;
1786 /* Only determine online state for managed links with RequiredForOnline=yes */
1787 if (!link
->network
|| !link
->network
->required_for_online
)
1788 online_state
= _LINK_ONLINE_STATE_INVALID
;
1789 else if (operstate
< link
->network
->required_operstate_for_online
.min
||
1790 operstate
> link
->network
->required_operstate_for_online
.max
)
1791 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1793 AddressFamily required_family
= link
->network
->required_family_for_online
;
1794 bool needs_ipv4
= required_family
& ADDRESS_FAMILY_IPV4
;
1795 bool needs_ipv6
= required_family
& ADDRESS_FAMILY_IPV6
;
1797 /* The operational state is within the range required for online.
1798 * If a particular address family is also required, we might revert
1799 * to offline in the blocks below. */
1800 online_state
= LINK_ONLINE_STATE_ONLINE
;
1802 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_DEGRADED
) {
1803 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1804 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1805 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1806 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1809 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_ROUTABLE
) {
1810 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1811 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1812 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1813 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1817 if (link
->carrier_state
!= carrier_state
) {
1818 link
->carrier_state
= carrier_state
;
1820 if (strv_extend(&p
, "CarrierState") < 0)
1824 if (link
->address_state
!= address_state
) {
1825 link
->address_state
= address_state
;
1827 if (strv_extend(&p
, "AddressState") < 0)
1831 if (link
->ipv4_address_state
!= ipv4_address_state
) {
1832 link
->ipv4_address_state
= ipv4_address_state
;
1834 if (strv_extend(&p
, "IPv4AddressState") < 0)
1838 if (link
->ipv6_address_state
!= ipv6_address_state
) {
1839 link
->ipv6_address_state
= ipv6_address_state
;
1841 if (strv_extend(&p
, "IPv6AddressState") < 0)
1845 if (link
->operstate
!= operstate
) {
1846 link
->operstate
= operstate
;
1848 if (strv_extend(&p
, "OperationalState") < 0)
1852 if (link
->online_state
!= online_state
) {
1853 link
->online_state
= online_state
;
1855 if (strv_extend(&p
, "OnlineState") < 0)
1860 link_send_changed_strv(link
, p
);
1864 if (also_update_master
) {
1867 if (link_get_master(link
, &master
) >= 0)
1868 link_update_operstate(master
, true);
1872 #define FLAG_STRING(string, flag, old, new) \
1873 (((old ^ new) & flag) \
1874 ? ((old & flag) ? (" -" string) : (" +" string)) \
1877 static int link_update_flags(Link
*link
, sd_netlink_message
*message
) {
1878 bool link_was_admin_up
, had_carrier
;
1886 r
= sd_rtnl_message_link_get_flags(message
, &flags
);
1888 return log_link_debug_errno(link
, r
, "rtnl: failed to read link flags: %m");
1890 r
= sd_netlink_message_read_u8(message
, IFLA_OPERSTATE
, &operstate
);
1892 /* If we got a message without operstate, assume the state was unchanged. */
1893 operstate
= link
->kernel_operstate
;
1895 return log_link_debug_errno(link
, r
, "rtnl: failed to read operational state: %m");
1897 if (link
->flags
== flags
&& link
->kernel_operstate
== operstate
)
1900 if (link
->flags
!= flags
) {
1901 unsigned unknown_flags
, unknown_flags_added
, unknown_flags_removed
;
1903 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",
1904 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
1905 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
1906 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
1907 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
1908 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
1909 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
1910 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
1911 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
1912 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
1913 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
1914 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
1915 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
1916 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
1917 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
1918 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
1919 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
1920 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
1921 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
1922 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
1924 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
1925 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
1926 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
1927 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
1928 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
1929 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
1930 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
1931 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
1933 if (unknown_flags_added
)
1934 log_link_debug(link
, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added
);
1936 if (unknown_flags_removed
)
1937 log_link_debug(link
, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed
);
1940 link_was_admin_up
= link
->flags
& IFF_UP
;
1941 had_carrier
= link_has_carrier(link
);
1943 link
->flags
= flags
;
1944 link
->kernel_operstate
= operstate
;
1946 link_update_operstate(link
, true);
1948 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
1949 log_link_info(link
, "Link UP");
1951 r
= link_admin_state_up(link
);
1954 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
)) {
1955 log_link_info(link
, "Link DOWN");
1957 r
= link_admin_state_down(link
);
1962 if (!had_carrier
&& link_has_carrier(link
)) {
1963 log_link_info(link
, "Gained carrier");
1965 r
= link_carrier_gained(link
);
1968 } else if (had_carrier
&& !link_has_carrier(link
)) {
1969 log_link_info(link
, "Lost carrier");
1971 r
= link_carrier_lost(link
);
1979 static int link_update_master(Link
*link
, sd_netlink_message
*message
) {
1980 int master_ifindex
, r
;
1985 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t*) &master_ifindex
);
1989 return log_link_debug_errno(link
, r
, "rtnl: failed to read master ifindex: %m");
1991 if (master_ifindex
== link
->ifindex
)
1994 if (master_ifindex
== link
->master_ifindex
)
1997 if (link
->master_ifindex
== 0)
1998 log_link_debug(link
, "Attached to master interface: %i", master_ifindex
);
1999 else if (master_ifindex
== 0)
2000 log_link_debug(link
, "Detached from master interface: %i", link
->master_ifindex
);
2002 log_link_debug(link
, "Master interface changed: %i %s %i", link
->master_ifindex
,
2003 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), master_ifindex
);
2005 link_drop_from_master(link
);
2007 link
->master_ifindex
= master_ifindex
;
2009 r
= link_append_to_master(link
);
2011 return log_link_debug_errno(link
, r
, "Failed to append link to master: %m");
2016 static int link_update_driver(Link
*link
, sd_netlink_message
*message
) {
2020 assert(link
->manager
);
2023 /* Driver is already read. Assuming the driver is never changed. */
2024 if (link
->ethtool_driver_read
)
2027 /* When udevd is running, read the driver after the interface is initialized by udevd.
2028 * Otherwise, ethtool may not work correctly. See issue #22538.
2029 * When udevd is not running, read the value when the interface is detected. */
2030 if (udev_available() && !link
->dev
)
2033 link
->ethtool_driver_read
= true;
2035 r
= ethtool_get_driver(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
2037 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
2041 log_link_debug(link
, "Found driver: %s", strna(link
->driver
));
2043 if (streq_ptr(link
->driver
, "dsa")) {
2044 uint32_t dsa_master_ifindex
= 0;
2046 r
= sd_netlink_message_read_u32(message
, IFLA_LINK
, &dsa_master_ifindex
);
2047 if (r
< 0 && r
!= -ENODATA
)
2048 return log_link_debug_errno(link
, r
, "rtnl: failed to read ifindex of the DSA master interface: %m");
2050 if (dsa_master_ifindex
> INT_MAX
) {
2051 log_link_debug(link
, "rtnl: received too large DSA master ifindex (%"PRIu32
" > INT_MAX), ignoring.",
2052 dsa_master_ifindex
);
2053 dsa_master_ifindex
= 0;
2056 link
->dsa_master_ifindex
= (int) dsa_master_ifindex
;
2059 return 1; /* needs reconfigure */
2062 static int link_update_permanent_hardware_address_from_ethtool(Link
*link
, sd_netlink_message
*message
) {
2066 assert(link
->manager
);
2069 if (link
->ethtool_permanent_hw_addr_read
)
2072 /* When udevd is running, read the permanent hardware address after the interface is
2073 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2074 * When udevd is not running, read the value when the interface is detected. */
2075 if (udev_available() && !link
->dev
)
2078 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2079 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, NULL
);
2083 return log_link_debug_errno(link
, r
, "Failed to read IFLA_ADDRESS attribute: %m");
2085 link
->ethtool_permanent_hw_addr_read
= true;
2087 r
= ethtool_get_permanent_hw_addr(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->permanent_hw_addr
);
2089 log_link_debug_errno(link
, r
, "Permanent hardware address not found, continuing without: %m");
2094 static int link_update_permanent_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2098 assert(link
->manager
);
2101 if (link
->permanent_hw_addr
.length
> 0)
2104 r
= netlink_message_read_hw_addr(message
, IFLA_PERM_ADDRESS
, &link
->permanent_hw_addr
);
2107 return log_link_debug_errno(link
, r
, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2109 /* Fallback to ethtool for older kernels. */
2110 r
= link_update_permanent_hardware_address_from_ethtool(link
, message
);
2115 if (link
->permanent_hw_addr
.length
> 0)
2116 log_link_debug(link
, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link
->permanent_hw_addr
));
2118 return 1; /* needs reconfigure */
2121 static int link_update_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2122 struct hw_addr_data addr
;
2128 r
= netlink_message_read_hw_addr(message
, IFLA_BROADCAST
, &link
->bcast_addr
);
2129 if (r
< 0 && r
!= -ENODATA
)
2130 return log_link_debug_errno(link
, r
, "rtnl: failed to read broadcast address: %m");
2132 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, &addr
);
2136 return log_link_debug_errno(link
, r
, "rtnl: failed to read hardware address: %m");
2138 if (hw_addr_equal(&link
->hw_addr
, &addr
))
2141 if (link
->hw_addr
.length
== 0)
2142 log_link_debug(link
, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr
));
2144 log_link_debug(link
, "Hardware address is changed: %s %s %s",
2145 HW_ADDR_TO_STR(&link
->hw_addr
),
2146 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
),
2147 HW_ADDR_TO_STR(&addr
));
2149 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2152 link
->hw_addr
= addr
;
2154 if (!hw_addr_is_null(&link
->hw_addr
)) {
2155 r
= hashmap_ensure_put(&link
->manager
->links_by_hw_addr
, &hw_addr_hash_ops
, &link
->hw_addr
, link
);
2156 if (r
== -EEXIST
&& streq_ptr(link
->kind
, "bond"))
2157 /* bonding master and its slaves have the same hardware address. */
2158 r
= hashmap_replace(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2160 log_link_debug_errno(link
, r
, "Failed to manage link by its new hardware address, ignoring: %m");
2163 r
= ipv4acd_update_mac(link
);
2165 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4 ACD client: %m");
2167 r
= ipv4ll_update_mac(link
);
2169 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2171 r
= dhcp4_update_mac(link
);
2173 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2175 r
= dhcp6_update_mac(link
);
2177 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2179 r
= radv_update_mac(link
);
2181 return log_link_debug_errno(link
, r
, "Could not update MAC address for Router Advertisement: %m");
2183 if (link
->ndisc
&& link
->hw_addr
.length
== ETH_ALEN
) {
2184 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->hw_addr
.ether
);
2186 return log_link_debug_errno(link
, r
, "Could not update MAC for NDisc: %m");
2189 if (link
->lldp_rx
) {
2190 r
= sd_lldp_rx_set_filter_address(link
->lldp_rx
, &link
->hw_addr
.ether
);
2192 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Rx: %m");
2195 if (link
->lldp_tx
) {
2196 r
= sd_lldp_tx_set_hwaddr(link
->lldp_tx
, &link
->hw_addr
.ether
);
2198 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Tx: %m");
2201 return 1; /* needs reconfigure */
2204 static int link_update_mtu(Link
*link
, sd_netlink_message
*message
) {
2205 uint32_t mtu
, min_mtu
= 0, max_mtu
= UINT32_MAX
;
2211 r
= sd_netlink_message_read_u32(message
, IFLA_MTU
, &mtu
);
2215 return log_link_debug_errno(link
, r
, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2219 r
= sd_netlink_message_read_u32(message
, IFLA_MIN_MTU
, &min_mtu
);
2220 if (r
< 0 && r
!= -ENODATA
)
2221 return log_link_debug_errno(link
, r
, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2223 r
= sd_netlink_message_read_u32(message
, IFLA_MAX_MTU
, &max_mtu
);
2224 if (r
< 0 && r
!= -ENODATA
)
2225 return log_link_debug_errno(link
, r
, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2228 max_mtu
= UINT32_MAX
;
2230 link
->min_mtu
= min_mtu
;
2231 link
->max_mtu
= max_mtu
;
2233 if (link
->original_mtu
== 0) {
2234 link
->original_mtu
= mtu
;
2235 log_link_debug(link
, "Saved original MTU %" PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2236 link
->original_mtu
, link
->min_mtu
, link
->max_mtu
);
2239 if (link
->mtu
== mtu
)
2243 log_link_debug(link
, "MTU is changed: %"PRIu32
" %s %"PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2244 link
->mtu
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), mtu
,
2245 link
->min_mtu
, link
->max_mtu
);
2249 if (link
->dhcp_client
) {
2250 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
, link
->mtu
);
2252 return log_link_debug_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2256 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
2258 return log_link_debug_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
2264 static int link_update_alternative_names(Link
*link
, sd_netlink_message
*message
) {
2265 _cleanup_strv_free_
char **altnames
= NULL
;
2271 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &altnames
);
2273 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2274 * interface has no alternative name. */
2277 return log_link_debug_errno(link
, r
, "rtnl: failed to read alternative names: %m");
2279 if (strv_equal(altnames
, link
->alternative_names
))
2282 STRV_FOREACH(n
, link
->alternative_names
)
2283 hashmap_remove(link
->manager
->links_by_name
, *n
);
2285 strv_free_and_replace(link
->alternative_names
, altnames
);
2287 STRV_FOREACH(n
, link
->alternative_names
) {
2288 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, *n
, link
);
2290 return log_link_debug_errno(link
, r
, "Failed to manage link by its new alternative names: %m");
2293 return 1; /* needs reconfigure */
2296 static int link_update_name(Link
*link
, sd_netlink_message
*message
) {
2297 char ifname_from_index
[IF_NAMESIZE
];
2304 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
2309 return log_link_debug_errno(link
, r
, "Failed to read interface name in RTM_NEWLINK message: %m");
2311 if (streq(ifname
, link
->ifname
))
2314 r
= format_ifname(link
->ifindex
, ifname_from_index
);
2316 return log_link_debug_errno(link
, r
, "Could not get interface name for index %i.", link
->ifindex
);
2318 if (!streq(ifname
, ifname_from_index
)) {
2319 log_link_debug(link
, "New interface name '%s' received from the kernel does not correspond "
2320 "with the name currently configured on the actual interface '%s'. Ignoring.",
2321 ifname
, ifname_from_index
);
2325 log_link_info(link
, "Interface name change detected, renamed to %s.", ifname
);
2327 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
2329 r
= free_and_strdup(&link
->ifname
, ifname
);
2331 return log_oom_debug();
2333 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2335 return log_link_debug_errno(link
, r
, "Failed to manage link by its new name: %m");
2337 if (link
->dhcp_client
) {
2338 r
= sd_dhcp_client_set_ifname(link
->dhcp_client
, link
->ifname
);
2340 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP client: %m");
2343 if (link
->dhcp6_client
) {
2344 r
= sd_dhcp6_client_set_ifname(link
->dhcp6_client
, link
->ifname
);
2346 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP6 client: %m");
2350 r
= sd_ndisc_set_ifname(link
->ndisc
, link
->ifname
);
2352 return log_link_debug_errno(link
, r
, "Failed to update interface name in NDisc: %m");
2355 if (link
->dhcp_server
) {
2356 r
= sd_dhcp_server_set_ifname(link
->dhcp_server
, link
->ifname
);
2358 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP server: %m");
2362 r
= sd_radv_set_ifname(link
->radv
, link
->ifname
);
2364 return log_link_debug_errno(link
, r
, "Failed to update interface name in Router Advertisement: %m");
2367 if (link
->lldp_rx
) {
2368 r
= sd_lldp_rx_set_ifname(link
->lldp_rx
, link
->ifname
);
2370 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Rx: %m");
2373 if (link
->lldp_tx
) {
2374 r
= sd_lldp_tx_set_ifname(link
->lldp_tx
, link
->ifname
);
2376 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Tx: %m");
2380 r
= sd_ipv4ll_set_ifname(link
->ipv4ll
, link
->ifname
);
2382 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4LL client: %m");
2385 r
= ipv4acd_set_ifname(link
);
2387 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4ACD client: %m");
2389 return 1; /* needs reconfigure */
2392 static int link_update(Link
*link
, sd_netlink_message
*message
) {
2393 bool needs_reconfigure
= false;
2399 r
= link_update_name(link
, message
);
2402 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2404 r
= link_update_alternative_names(link
, message
);
2407 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2409 r
= link_update_mtu(link
, message
);
2413 r
= link_update_driver(link
, message
);
2416 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2418 r
= link_update_permanent_hardware_address(link
, message
);
2421 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2423 r
= link_update_hardware_address(link
, message
);
2426 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2428 r
= link_update_master(link
, message
);
2432 r
= link_update_ipv6ll_addrgen_mode(link
, message
);
2436 r
= link_update_flags(link
, message
);
2440 r
= link_update_bridge_vlan(link
, message
);
2444 return needs_reconfigure
;
2447 static Link
*link_drop_or_unref(Link
*link
) {
2451 return link_unref(link
);
2452 return link_drop(link
);
2455 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_drop_or_unref
);
2457 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
2458 _cleanup_free_
char *ifname
= NULL
, *kind
= NULL
, *state_file
= NULL
, *lease_file
= NULL
, *lldp_file
= NULL
;
2459 _cleanup_(link_drop_or_unrefp
) Link
*link
= NULL
;
2460 unsigned short iftype
;
2467 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2469 return log_debug_errno(r
, "rtnl: failed to read ifindex from link message: %m");
2470 else if (ifindex
<= 0)
2471 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "rtnl: received link message without valid ifindex.");
2473 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
2475 return log_debug_errno(r
, "rtnl: failed to read interface type from link message: %m");
2477 r
= sd_netlink_message_read_string_strdup(message
, IFLA_IFNAME
, &ifname
);
2479 return log_debug_errno(r
, "rtnl: failed to read interface name from link message: %m");
2481 /* check for link kind */
2482 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
2484 r
= sd_netlink_message_read_string_strdup(message
, IFLA_INFO_KIND
, &kind
);
2485 if (r
< 0 && r
!= -ENODATA
)
2486 return log_debug_errno(r
, "rtnl: failed to read interface kind from link message: %m");
2487 r
= sd_netlink_message_exit_container(message
);
2489 return log_debug_errno(r
, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2492 if (!manager
->test_mode
) {
2493 /* Do not update state files when running in test mode. */
2494 if (asprintf(&state_file
, "/run/systemd/netif/links/%d", ifindex
) < 0)
2495 return log_oom_debug();
2497 if (asprintf(&lease_file
, "/run/systemd/netif/leases/%d", ifindex
) < 0)
2498 return log_oom_debug();
2500 if (asprintf(&lldp_file
, "/run/systemd/netif/lldp/%d", ifindex
) < 0)
2501 return log_oom_debug();
2504 link
= new(Link
, 1);
2510 .state
= LINK_STATE_PENDING
,
2511 .online_state
= _LINK_ONLINE_STATE_INVALID
,
2514 .ifname
= TAKE_PTR(ifname
),
2515 .kind
= TAKE_PTR(kind
),
2517 .bridge_vlan_pvid
= UINT16_MAX
,
2519 .ipv6ll_address_gen_mode
= _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID
,
2521 .state_file
= TAKE_PTR(state_file
),
2522 .lease_file
= TAKE_PTR(lease_file
),
2523 .lldp_file
= TAKE_PTR(lldp_file
),
2526 .dns_default_route
= -1,
2527 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
2528 .mdns
= _RESOLVE_SUPPORT_INVALID
,
2529 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
2530 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
2533 r
= hashmap_ensure_put(&manager
->links_by_index
, NULL
, INT_TO_PTR(link
->ifindex
), link
);
2535 return log_link_debug_errno(link
, r
, "Failed to store link into manager: %m");
2537 link
->manager
= manager
;
2539 r
= hashmap_ensure_put(&manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2541 return log_link_debug_errno(link
, r
, "Failed to manage link by its interface name: %m");
2543 log_link_debug(link
, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2544 link
->ifindex
, strna(arphrd_to_name(link
->iftype
)), link
->iftype
, strna(link
->kind
));
2546 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2547 * message arrived too early. Request the wireless link information again.
2549 if (set_remove(manager
->new_wlan_ifindices
, INT_TO_PTR(link
->ifindex
))) {
2550 r
= link_get_wlan_interface(link
);
2552 log_link_warning_errno(link
, r
, "Failed to get wireless interface, ignoring: %m");
2555 *ret
= TAKE_PTR(link
);
2559 int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, Manager
*manager
) {
2561 NetDev
*netdev
= NULL
;
2570 if (sd_netlink_message_is_error(message
)) {
2571 r
= sd_netlink_message_get_errno(message
);
2573 log_message_warning_errno(message
, r
, "rtnl: Could not receive link message, ignoring");
2578 r
= sd_netlink_message_get_type(message
, &type
);
2580 log_warning_errno(r
, "rtnl: Could not get message type, ignoring: %m");
2582 } else if (!IN_SET(type
, RTM_NEWLINK
, RTM_DELLINK
)) {
2583 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type
);
2587 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2589 log_warning_errno(r
, "rtnl: Could not get ifindex from link message, ignoring: %m");
2591 } else if (ifindex
<= 0) {
2592 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex
);
2596 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
2598 log_warning_errno(r
, "rtnl: Received link message without ifname, ignoring: %m");
2602 (void) link_get_by_index(manager
, ifindex
, &link
);
2603 (void) netdev_get(manager
, name
, &netdev
);
2608 /* netdev exists, so make sure the ifindex matches */
2609 r
= netdev_set_ifindex(netdev
, message
);
2611 log_netdev_warning_errno(netdev
, r
, "Could not process new link message for netdev, ignoring: %m");
2617 /* link is new, so add it */
2618 r
= link_new(manager
, message
, &link
);
2620 log_warning_errno(r
, "Could not process new link message: %m");
2624 r
= link_update(link
, message
);
2626 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2627 link_enter_failed(link
);
2631 r
= link_check_initialized(link
);
2633 log_link_warning_errno(link
, r
, "Failed to check link is initialized: %m");
2634 link_enter_failed(link
);
2638 r
= link_update(link
, message
);
2640 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2641 link_enter_failed(link
);
2645 r
= link_reconfigure_impl(link
, /* force = */ false);
2647 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
2648 link_enter_failed(link
);
2657 netdev_drop(netdev
);
2661 assert_not_reached();
2667 int link_getlink_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, const char *error_msg
) {
2668 uint16_t message_type
;
2675 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2678 r
= sd_netlink_message_get_errno(m
);
2680 log_link_message_warning_errno(link
, m
, r
, error_msg
);
2681 link_enter_failed(link
);
2685 r
= sd_netlink_message_get_type(m
, &message_type
);
2687 log_link_debug_errno(link
, r
, "rtnl: failed to read link message type, ignoring: %m");
2690 if (message_type
!= RTM_NEWLINK
) {
2691 log_link_debug(link
, "rtnl: received invalid link message type, ignoring.");
2695 r
= link_update(link
, m
);
2697 link_enter_failed(link
);
2704 int link_call_getlink(Link
*link
, link_netlink_message_handler_t callback
) {
2705 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2709 assert(link
->manager
);
2710 assert(link
->manager
->rtnl
);
2713 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
, link
->ifindex
);
2717 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
,
2718 link_netlink_destroy_callback
, link
);
2726 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
2727 [LINK_STATE_PENDING
] = "pending",
2728 [LINK_STATE_INITIALIZED
] = "initialized",
2729 [LINK_STATE_CONFIGURING
] = "configuring",
2730 [LINK_STATE_CONFIGURED
] = "configured",
2731 [LINK_STATE_UNMANAGED
] = "unmanaged",
2732 [LINK_STATE_FAILED
] = "failed",
2733 [LINK_STATE_LINGER
] = "linger",
2736 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
2738 int link_flags_to_string_alloc(uint32_t flags
, char **ret
) {
2739 _cleanup_free_
char *str
= NULL
;
2740 static const char* map
[] = {
2741 [LOG2U(IFF_UP
)] = "up", /* interface is up. */
2742 [LOG2U(IFF_BROADCAST
)] = "broadcast", /* broadcast address valid. */
2743 [LOG2U(IFF_DEBUG
)] = "debug", /* turn on debugging. */
2744 [LOG2U(IFF_LOOPBACK
)] = "loopback", /* interface is a loopback net. */
2745 [LOG2U(IFF_POINTOPOINT
)] = "point-to-point", /* interface has p-p link. */
2746 [LOG2U(IFF_NOTRAILERS
)] = "no-trailers", /* avoid use of trailers. */
2747 [LOG2U(IFF_RUNNING
)] = "running", /* interface RFC2863 OPER_UP. */
2748 [LOG2U(IFF_NOARP
)] = "no-arp", /* no ARP protocol. */
2749 [LOG2U(IFF_PROMISC
)] = "promiscuous", /* receive all packets. */
2750 [LOG2U(IFF_ALLMULTI
)] = "all-multicast", /* receive all multicast packets. */
2751 [LOG2U(IFF_MASTER
)] = "master", /* master of a load balancer. */
2752 [LOG2U(IFF_SLAVE
)] = "slave", /* slave of a load balancer. */
2753 [LOG2U(IFF_MULTICAST
)] = "multicast", /* supports multicast. */
2754 [LOG2U(IFF_PORTSEL
)] = "portsel", /* can set media type. */
2755 [LOG2U(IFF_AUTOMEDIA
)] = "auto-media", /* auto media select active. */
2756 [LOG2U(IFF_DYNAMIC
)] = "dynamic", /* dialup device with changing addresses. */
2757 [LOG2U(IFF_LOWER_UP
)] = "lower-up", /* driver signals L1 up. */
2758 [LOG2U(IFF_DORMANT
)] = "dormant", /* driver signals dormant. */
2759 [LOG2U(IFF_ECHO
)] = "echo", /* echo sent packets. */
2764 for (size_t i
= 0; i
< ELEMENTSOF(map
); i
++)
2765 if (FLAGS_SET(flags
, 1 << i
) && map
[i
])
2766 if (!strextend_with_separator(&str
, ",", map
[i
]))
2769 *ret
= TAKE_PTR(str
);
2773 static const char * const kernel_operstate_table
[] = {
2774 [IF_OPER_UNKNOWN
] = "unknown",
2775 [IF_OPER_NOTPRESENT
] = "not-present",
2776 [IF_OPER_DOWN
] = "down",
2777 [IF_OPER_LOWERLAYERDOWN
] = "lower-layer-down",
2778 [IF_OPER_TESTING
] = "testing",
2779 [IF_OPER_DORMANT
] = "dormant",
2780 [IF_OPER_UP
] = "up",
2783 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate
, int);