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-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.h"
56 #include "networkd-routing-policy-rule.h"
57 #include "networkd-setlink.h"
58 #include "networkd-sriov.h"
59 #include "networkd-state-file.h"
60 #include "networkd-sysctl.h"
61 #include "networkd-wifi.h"
63 #include "socket-util.h"
64 #include "stdio-util.h"
65 #include "string-table.h"
68 #include "tmpfile-util.h"
70 #include "udev-util.h"
73 bool link_ipv6_enabled(Link
*link
) {
76 if (!socket_ipv6_is_supported())
79 if (link
->iftype
== ARPHRD_CAN
)
85 if (link
->network
->bond
)
88 if (link_may_have_ipv6ll(link
, /* check_multicast = */ false))
91 if (network_has_static_ipv6_configurations(link
->network
))
97 static bool link_is_ready_to_configure_one(Link
*link
, bool allow_unmanaged
) {
100 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
, LINK_STATE_UNMANAGED
))
104 return allow_unmanaged
;
106 if (!link
->network
->configure_without_carrier
) {
107 if (link
->set_flags_messages
> 0)
110 if (!link_has_carrier(link
))
114 if (link
->set_link_messages
> 0)
117 if (!link
->activated
)
123 bool link_is_ready_to_configure(Link
*link
, bool allow_unmanaged
) {
124 return check_ready_for_all_sr_iov_ports(link
, allow_unmanaged
, link_is_ready_to_configure_one
);
127 void link_ntp_settings_clear(Link
*link
) {
128 link
->ntp
= strv_free(link
->ntp
);
131 void link_dns_settings_clear(Link
*link
) {
132 if (link
->n_dns
!= UINT_MAX
)
133 for (unsigned i
= 0; i
< link
->n_dns
; i
++)
134 in_addr_full_free(link
->dns
[i
]);
135 link
->dns
= mfree(link
->dns
);
136 link
->n_dns
= UINT_MAX
;
138 link
->search_domains
= ordered_set_free(link
->search_domains
);
139 link
->route_domains
= ordered_set_free(link
->route_domains
);
141 link
->dns_default_route
= -1;
142 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
143 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
144 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
145 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
147 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
150 static void link_free_engines(Link
*link
) {
154 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
156 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
157 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
158 link
->dhcp4_6rd_tunnel_name
= mfree(link
->dhcp4_6rd_tunnel_name
);
160 link
->lldp_rx
= sd_lldp_rx_unref(link
->lldp_rx
);
161 link
->lldp_tx
= sd_lldp_tx_unref(link
->lldp_tx
);
163 link
->ipv4acd_by_address
= hashmap_free(link
->ipv4acd_by_address
);
165 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
167 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
168 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
170 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
171 link
->ndisc_expire
= sd_event_source_disable_unref(link
->ndisc_expire
);
174 link
->radv
= sd_radv_unref(link
->radv
);
177 static Link
*link_free(Link
*link
) {
180 link_ntp_settings_clear(link
);
181 link_dns_settings_clear(link
);
183 link
->routes
= set_free(link
->routes
);
184 link
->nexthops
= set_free(link
->nexthops
);
185 link
->neighbors
= set_free(link
->neighbors
);
186 link
->addresses
= set_free(link
->addresses
);
187 link
->qdiscs
= set_free(link
->qdiscs
);
188 link
->tclasses
= set_free(link
->tclasses
);
190 link
->dhcp_pd_prefixes
= set_free(link
->dhcp_pd_prefixes
);
192 link_free_engines(link
);
194 set_free(link
->sr_iov_virt_port_ifindices
);
196 strv_free(link
->alternative_names
);
199 free(link
->previous_ssid
);
202 unlink_and_free(link
->lease_file
);
203 unlink_and_free(link
->lldp_file
);
204 unlink_and_free(link
->state_file
);
206 sd_device_unref(link
->dev
);
207 netdev_unref(link
->netdev
);
209 hashmap_free(link
->bound_to_links
);
210 hashmap_free(link
->bound_by_links
);
212 set_free_with_destructor(link
->slaves
, link_unref
);
214 network_unref(link
->network
);
216 sd_event_source_disable_unref(link
->carrier_lost_timer
);
221 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
223 int link_get_by_index(Manager
*m
, int ifindex
, Link
**ret
) {
229 link
= hashmap_get(m
->links_by_index
, INT_TO_PTR(ifindex
));
238 int link_get_by_name(Manager
*m
, const char *ifname
, Link
**ret
) {
244 link
= hashmap_get(m
->links_by_name
, ifname
);
253 int link_get_by_hw_addr(Manager
*m
, const struct hw_addr_data
*hw_addr
, Link
**ret
) {
259 link
= hashmap_get(m
->links_by_hw_addr
, hw_addr
);
268 int link_get_master(Link
*link
, Link
**ret
) {
270 assert(link
->manager
);
273 if (link
->master_ifindex
<= 0 || link
->master_ifindex
== link
->ifindex
)
276 return link_get_by_index(link
->manager
, link
->master_ifindex
, ret
);
279 void link_set_state(Link
*link
, LinkState state
) {
282 if (link
->state
== state
)
285 log_link_debug(link
, "State changed: %s -> %s",
286 link_state_to_string(link
->state
),
287 link_state_to_string(state
));
291 link_send_changed(link
, "AdministrativeState", NULL
);
295 int link_stop_engines(Link
*link
, bool may_keep_dhcp
) {
299 assert(link
->manager
);
300 assert(link
->manager
->event
);
302 bool keep_dhcp
= may_keep_dhcp
&&
304 !link
->network
->dhcp_send_decline
&& /* IPv4 ACD for the DHCPv4 address is running. */
305 (link
->manager
->restarting
||
306 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
309 k
= sd_dhcp_client_stop(link
->dhcp_client
);
311 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
314 k
= sd_dhcp_server_stop(link
->dhcp_server
);
316 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 server: %m");
318 k
= sd_lldp_rx_stop(link
->lldp_rx
);
320 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Rx: %m");
322 k
= sd_lldp_tx_stop(link
->lldp_tx
);
324 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Tx: %m");
326 k
= sd_ipv4ll_stop(link
->ipv4ll
);
328 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
330 k
= ipv4acd_stop(link
);
332 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
334 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
336 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
338 k
= dhcp_pd_remove(link
, /* only_marked = */ false);
340 r
= log_link_warning_errno(link
, k
, "Could not remove DHCPv6 PD addresses and routes: %m");
342 k
= ndisc_stop(link
);
344 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
348 k
= sd_radv_stop(link
->radv
);
350 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
355 void link_enter_failed(Link
*link
) {
358 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
361 log_link_warning(link
, "Failed");
363 link_set_state(link
, LINK_STATE_FAILED
);
365 (void) link_stop_engines(link
, false);
368 void link_check_ready(Link
*link
) {
373 if (link
->state
== LINK_STATE_CONFIGURED
)
376 if (link
->state
!= LINK_STATE_CONFIGURING
)
377 return (void) log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
380 return (void) log_link_debug(link
, "%s(): link is unmanaged.", __func__
);
382 if (!link
->tc_configured
)
383 return (void) log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
385 if (link
->set_link_messages
> 0)
386 return (void) log_link_debug(link
, "%s(): link layer is configuring.", __func__
);
388 if (!link
->activated
)
389 return (void) log_link_debug(link
, "%s(): link is not activated.", __func__
);
391 if (link
->iftype
== ARPHRD_CAN
) {
392 /* let's shortcut things for CAN which doesn't need most of checks below. */
393 link_set_state(link
, LINK_STATE_CONFIGURED
);
397 if (!link
->stacked_netdevs_created
)
398 return (void) log_link_debug(link
, "%s(): stacked netdevs are not created.", __func__
);
400 if (!link
->static_addresses_configured
)
401 return (void) log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
403 if (!link
->static_address_labels_configured
)
404 return (void) log_link_debug(link
, "%s(): static address labels are not configured.", __func__
);
406 if (!link
->static_bridge_fdb_configured
)
407 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
409 if (!link
->static_bridge_mdb_configured
)
410 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
412 if (!link
->static_ipv6_proxy_ndp_configured
)
413 return (void) log_link_debug(link
, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__
);
415 if (!link
->static_neighbors_configured
)
416 return (void) log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
418 if (!link
->static_nexthops_configured
)
419 return (void) log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
421 if (!link
->static_routes_configured
)
422 return (void) log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
424 if (!link
->static_routing_policy_rules_configured
)
425 return (void) log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
427 if (!link
->sr_iov_configured
)
428 return (void) log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
430 /* IPv6LL is assigned after the link gains its carrier. */
431 if (!link
->network
->configure_without_carrier
&&
432 link_ipv6ll_enabled(link
) &&
433 !in6_addr_is_set(&link
->ipv6ll_address
))
434 return (void) log_link_debug(link
, "%s(): IPv6LL is not configured yet.", __func__
);
436 /* All static addresses must be ready. */
437 bool has_static_address
= false;
438 SET_FOREACH(a
, link
->addresses
) {
439 if (a
->source
!= NETWORK_CONFIG_SOURCE_STATIC
)
441 if (!address_is_ready(a
))
442 return (void) log_link_debug(link
, "%s(): static address %s is not ready.", __func__
,
443 IN_ADDR_PREFIX_TO_STRING(a
->family
, &a
->in_addr
, a
->prefixlen
));
444 has_static_address
= true;
447 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
448 if (has_static_address
)
451 /* If no dynamic addressing protocol enabled, assume the interface is ready.
452 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
453 if (!link_ipv4ll_enabled(link
) && !link_dhcp4_enabled(link
) &&
454 !link_dhcp6_enabled(link
) && !link_dhcp_pd_is_enabled(link
) &&
455 (link
->network
->configure_without_carrier
|| !link_ipv6_accept_ra_enabled(link
)))
459 link_ipv4ll_enabled(link
) && link
->ipv4ll_address_configured
&&
460 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_IPV4LL
);
462 link_dhcp4_enabled(link
) && link
->dhcp4_configured
&&
463 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP4
);
465 link_dhcp6_enabled(link
) && link
->dhcp6_configured
&&
466 (!link
->network
->dhcp6_use_address
||
467 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP6
));
469 link_dhcp_pd_is_enabled(link
) && link
->dhcp_pd_configured
&&
470 (!link
->network
->dhcp_pd_assign
||
471 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_DHCP_PD
));
473 link_ipv6_accept_ra_enabled(link
) && link
->ndisc_configured
&&
474 (!link
->network
->ipv6_accept_ra_use_autonomous_prefix
||
475 link_check_addresses_ready(link
, NETWORK_CONFIG_SOURCE_NDISC
));
477 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
478 if (dhcp_pd_is_uplink(link
, link
, /* accept_auto = */ false)) {
479 if (link_dhcp4_enabled(link
) && link
->network
->dhcp_use_6rd
&&
480 sd_dhcp_lease_has_6rd(link
->dhcp_lease
)) {
482 return (void) log_link_debug(link
, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__
);
484 return (void) log_link_debug(link
, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__
);
487 if (link_dhcp6_enabled(link
) && link
->network
->dhcp6_use_pd_prefix
&&
488 sd_dhcp6_lease_has_pd_prefix(link
->dhcp6_lease
)) {
490 return (void) log_link_debug(link
, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__
);
492 return (void) log_link_debug(link
, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__
);
496 /* At least one dynamic addressing protocol is finished. */
497 if (!ipv4ll_ready
&& !dhcp4_ready
&& !dhcp6_ready
&& !dhcp_pd_ready
&& !ndisc_ready
)
498 return (void) log_link_debug(link
, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__
);
500 log_link_debug(link
, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
502 yes_no(ipv4ll_ready
),
505 yes_no(dhcp_pd_ready
),
506 yes_no(ndisc_ready
));
509 link_set_state(link
, LINK_STATE_CONFIGURED
);
512 static int link_request_static_configs(Link
*link
) {
516 assert(link
->network
);
517 assert(link
->state
!= _LINK_STATE_INVALID
);
519 r
= link_request_static_addresses(link
);
523 r
= link_request_static_address_labels(link
);
527 r
= link_request_static_bridge_fdb(link
);
531 r
= link_request_static_bridge_mdb(link
);
535 r
= link_request_static_ipv6_proxy_ndp_addresses(link
);
539 r
= link_request_static_neighbors(link
);
543 r
= link_request_static_nexthops(link
, false);
547 r
= link_request_static_routes(link
, false);
551 r
= link_request_static_routing_policy_rules(link
);
558 static int link_request_stacked_netdevs(Link
*link
) {
564 link
->stacked_netdevs_created
= false;
566 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
567 r
= link_request_stacked_netdev(link
, netdev
);
572 if (link
->create_stacked_netdev_messages
== 0) {
573 link
->stacked_netdevs_created
= true;
574 link_check_ready(link
);
580 static int link_acquire_dynamic_ipv6_conf(Link
*link
) {
585 r
= radv_start(link
);
587 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Advertisement engine: %m");
589 r
= ndisc_start(link
);
591 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Discovery: %m");
593 r
= dhcp6_start(link
);
595 return log_link_warning_errno(link
, r
, "Failed to start DHCPv6 client: %m");
600 static int link_acquire_dynamic_ipv4_conf(Link
*link
) {
604 assert(link
->manager
);
605 assert(link
->manager
->event
);
607 if (link
->dhcp_client
) {
608 r
= dhcp4_start(link
);
610 return log_link_warning_errno(link
, r
, "Failed to start DHCPv4 client: %m");
612 log_link_debug(link
, "Acquiring DHCPv4 lease.");
614 } else if (link
->ipv4ll
) {
615 if (in4_addr_is_set(&link
->network
->ipv4ll_start_address
)) {
616 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &link
->network
->ipv4ll_start_address
);
618 return log_link_warning_errno(link
, r
, "Could not set IPv4 link-local start address: %m");
621 r
= sd_ipv4ll_start(link
->ipv4ll
);
623 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
625 log_link_debug(link
, "Acquiring IPv4 link-local address.");
628 if (link
->dhcp_server
) {
629 r
= sd_dhcp_server_start(link
->dhcp_server
);
631 return log_link_warning_errno(link
, r
, "Could not start DHCP server: %m");
634 r
= ipv4acd_start(link
);
636 return log_link_warning_errno(link
, r
, "Could not start IPv4 ACD client: %m");
641 static int link_acquire_dynamic_conf(Link
*link
) {
645 assert(link
->network
);
647 r
= link_acquire_dynamic_ipv4_conf(link
);
651 if (in6_addr_is_set(&link
->ipv6ll_address
)) {
652 r
= link_acquire_dynamic_ipv6_conf(link
);
657 if (!link_radv_enabled(link
) || !link
->network
->dhcp_pd_announce
) {
658 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
659 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
660 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
661 * below will be called in radv_start(). */
662 r
= dhcp_request_prefix_delegation(link
);
664 return log_link_warning_errno(link
, r
, "Failed to request DHCP delegated subnet prefix: %m");
668 r
= sd_lldp_tx_start(link
->lldp_tx
);
670 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
674 r
= sd_lldp_rx_start(link
->lldp_rx
);
676 return log_link_warning_errno(link
, r
, "Failed to start LLDP client: %m");
682 int link_ipv6ll_gained(Link
*link
) {
687 log_link_info(link
, "Gained IPv6LL");
689 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
))
692 r
= link_acquire_dynamic_ipv6_conf(link
);
696 link_check_ready(link
);
700 int link_handle_bound_to_list(Link
*link
) {
701 bool required_up
= false;
702 bool link_is_up
= false;
707 /* If at least one interface in bound_to_links has carrier, then make this interface up.
708 * If all interfaces in bound_to_links do not, then make this interface down. */
710 if (hashmap_isempty(link
->bound_to_links
))
713 if (link
->flags
& IFF_UP
)
716 HASHMAP_FOREACH(l
, link
->bound_to_links
)
717 if (link_has_carrier(l
)) {
722 if (!required_up
&& link_is_up
)
723 return link_request_to_bring_up_or_down(link
, /* up = */ false);
724 if (required_up
&& !link_is_up
)
725 return link_request_to_bring_up_or_down(link
, /* up = */ true);
730 static int link_handle_bound_by_list(Link
*link
) {
736 /* Update up or down state of interfaces which depend on this interface's carrier state. */
738 if (hashmap_isempty(link
->bound_by_links
))
741 HASHMAP_FOREACH(l
, link
->bound_by_links
) {
742 r
= link_handle_bound_to_list(l
);
750 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
759 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
762 r
= hashmap_ensure_put(h
, NULL
, INT_TO_PTR(carrier
->ifindex
), carrier
);
771 static int link_new_bound_by_list(Link
*link
) {
777 assert(link
->manager
);
781 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
782 if (!carrier
->network
)
785 if (strv_isempty(carrier
->network
->bind_carrier
))
788 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
789 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
795 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
796 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
804 static int link_new_bound_to_list(Link
*link
) {
810 assert(link
->manager
);
815 if (strv_isempty(link
->network
->bind_carrier
))
820 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
821 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
822 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
828 HASHMAP_FOREACH(carrier
, link
->bound_to_links
) {
829 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
837 static void link_free_bound_to_list(Link
*link
) {
838 bool updated
= false;
843 while ((bound_to
= hashmap_steal_first(link
->bound_to_links
))) {
846 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
847 link_dirty(bound_to
);
854 static void link_free_bound_by_list(Link
*link
) {
855 bool updated
= false;
860 while ((bound_by
= hashmap_steal_first(link
->bound_by_links
))) {
863 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
864 link_dirty(bound_by
);
865 link_handle_bound_to_list(bound_by
);
873 static int link_append_to_master(Link
*link
) {
879 /* - The link may have no master.
880 * - RTM_NEWLINK message about master interface may not be received yet. */
881 if (link_get_master(link
, &master
) < 0)
884 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
892 static void link_drop_from_master(Link
*link
) {
900 if (link_get_master(link
, &master
) < 0)
903 link_unref(set_remove(master
->slaves
, link
));
906 static void link_drop_requests(Link
*link
) {
910 assert(link
->manager
);
912 ORDERED_SET_FOREACH(req
, link
->manager
->request_queue
)
913 if (req
->link
== link
)
914 request_detach(link
->manager
, req
);
917 static Link
*link_drop(Link
*link
) {
921 assert(link
->manager
);
923 link_set_state(link
, LINK_STATE_LINGER
);
925 /* Drop all references from other links and manager. Note that async netlink calls may have
926 * references to the link, and they will be dropped when we receive replies. */
928 link_drop_requests(link
);
930 link_free_bound_to_list(link
);
931 link_free_bound_by_list(link
);
933 link_clear_sr_iov_ifindices(link
);
935 link_drop_from_master(link
);
937 if (link
->state_file
)
938 (void) unlink(link
->state_file
);
942 STRV_FOREACH(n
, link
->alternative_names
)
943 hashmap_remove(link
->manager
->links_by_name
, *n
);
944 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
946 /* bonding master and its slaves have the same hardware address. */
947 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
949 /* The following must be called at last. */
950 assert_se(hashmap_remove(link
->manager
->links_by_index
, INT_TO_PTR(link
->ifindex
)) == link
);
951 return link_unref(link
);
954 static int link_drop_foreign_config(Link
*link
) {
958 assert(link
->manager
);
960 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
961 * to remove loopback address or addresses used for root NFS. */
963 if (IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
965 if (FLAGS_SET(link
->flags
, IFF_LOOPBACK
))
967 if (link
->network
->keep_configuration
== KEEP_CONFIGURATION_YES
)
970 r
= link_drop_foreign_routes(link
);
972 RET_GATHER(r
, link_drop_foreign_nexthops(link
));
973 RET_GATHER(r
, link_drop_foreign_addresses(link
));
974 RET_GATHER(r
, link_drop_foreign_neighbors(link
));
975 RET_GATHER(r
, manager_drop_foreign_routing_policy_rules(link
->manager
));
980 static int link_drop_managed_config(Link
*link
) {
984 assert(link
->manager
);
986 r
= link_drop_managed_routes(link
);
988 RET_GATHER(r
, link_drop_managed_nexthops(link
));
989 RET_GATHER(r
, link_drop_managed_addresses(link
));
990 RET_GATHER(r
, link_drop_managed_neighbors(link
));
991 RET_GATHER(r
, link_drop_managed_routing_policy_rules(link
));
996 static void link_foreignize_config(Link
*link
) {
998 assert(link
->manager
);
1000 link_foreignize_routes(link
);
1001 link_foreignize_nexthops(link
);
1002 link_foreignize_addresses(link
);
1003 link_foreignize_neighbors(link
);
1004 link_foreignize_routing_policy_rules(link
);
1007 static int link_configure(Link
*link
) {
1011 assert(link
->network
);
1012 assert(link
->state
== LINK_STATE_INITIALIZED
);
1014 link_set_state(link
, LINK_STATE_CONFIGURING
);
1016 r
= link_new_bound_to_list(link
);
1020 r
= link_request_traffic_control(link
);
1024 if (link
->iftype
== ARPHRD_CAN
) {
1025 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1026 r
= link_request_to_set_can(link
);
1030 return link_request_to_activate(link
);
1033 r
= link_request_sr_iov_vfs(link
);
1037 r
= link_set_sysctl(link
);
1041 r
= link_request_to_set_mac(link
, /* allow_retry = */ true);
1045 r
= link_request_to_set_ipoib(link
);
1049 r
= link_request_to_set_flags(link
);
1053 r
= link_request_to_set_group(link
);
1057 r
= link_configure_mtu(link
);
1061 r
= link_request_to_set_addrgen_mode(link
);
1065 r
= link_request_to_set_master(link
);
1069 r
= link_request_stacked_netdevs(link
);
1073 r
= link_request_to_set_bond(link
);
1077 r
= link_request_to_set_bridge(link
);
1081 r
= link_request_to_set_bridge_vlan(link
);
1085 r
= link_request_to_activate(link
);
1089 r
= ipv4ll_configure(link
);
1093 r
= link_request_dhcp4_client(link
);
1097 r
= link_request_dhcp6_client(link
);
1101 r
= link_request_ndisc(link
);
1105 r
= link_request_dhcp_server(link
);
1109 r
= link_request_radv(link
);
1113 r
= link_lldp_rx_configure(link
);
1117 r
= link_lldp_tx_configure(link
);
1121 r
= link_drop_foreign_config(link
);
1125 r
= link_request_static_configs(link
);
1129 if (!link_has_carrier(link
))
1132 return link_acquire_dynamic_conf(link
);
1135 static int link_get_network(Link
*link
, Network
**ret
) {
1140 assert(link
->manager
);
1143 ORDERED_HASHMAP_FOREACH(network
, link
->manager
->networks
) {
1146 r
= net_match_config(
1150 &link
->permanent_hw_addr
,
1155 link
->alternative_names
,
1164 if (network
->match
.ifname
&& link
->dev
) {
1165 uint8_t name_assign_type
= NET_NAME_UNKNOWN
;
1168 if (sd_device_get_sysattr_value(link
->dev
, "name_assign_type", &attr
) >= 0)
1169 (void) safe_atou8(attr
, &name_assign_type
);
1171 warn
= name_assign_type
== NET_NAME_ENUM
;
1174 log_link_full(link
, warn
? LOG_WARNING
: LOG_DEBUG
,
1175 "found matching network '%s'%s.",
1177 warn
? ", based on potentially unpredictable interface name" : "");
1179 if (network
->unmanaged
)
1189 int link_reconfigure_impl(Link
*link
, bool force
) {
1190 Network
*network
= NULL
;
1191 NetDev
*netdev
= NULL
;
1196 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
1199 r
= netdev_get(link
->manager
, link
->ifname
, &netdev
);
1200 if (r
< 0 && r
!= -ENOENT
)
1203 r
= link_get_network(link
, &network
);
1204 if (r
< 0 && r
!= -ENOENT
)
1207 if (link
->state
!= LINK_STATE_UNMANAGED
&& !network
)
1208 /* If link is in initialized state, then link->network is also NULL. */
1211 if (link
->network
== network
&& !force
)
1215 if (link
->state
== LINK_STATE_INITIALIZED
)
1216 log_link_info(link
, "Configuring with %s.", network
->filename
);
1218 log_link_info(link
, "Reconfiguring with %s.", network
->filename
);
1220 log_link_full(link
, link
->state
== LINK_STATE_INITIALIZED
? LOG_DEBUG
: LOG_INFO
,
1221 "Unmanaging interface.");
1223 /* Dropping old .network file */
1224 r
= link_stop_engines(link
, false);
1228 link_drop_requests(link
);
1230 if (network
&& !force
&& network
->keep_configuration
!= KEEP_CONFIGURATION_YES
)
1231 /* When a new/updated .network file is assigned, first make all configs (addresses,
1232 * routes, and so on) foreign, and then drop unnecessary configs later by
1233 * link_drop_foreign_config() in link_configure().
1234 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1235 * here we need to drop the configs such as addresses, routes, and so on configured by
1236 * the previously assigned .network file. */
1237 link_foreignize_config(link
);
1239 /* Remove all managed configs. Note, foreign configs are removed in later by
1240 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1241 r
= link_drop_managed_config(link
);
1246 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1247 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1248 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1249 * map here, as it depends on .network files assigned to other links. */
1250 link_free_bound_to_list(link
);
1252 link_free_engines(link
);
1253 link
->network
= network_unref(link
->network
);
1255 netdev_unref(link
->netdev
);
1256 link
->netdev
= netdev_ref(netdev
);
1259 link_set_state(link
, LINK_STATE_UNMANAGED
);
1263 /* Then, apply new .network file */
1264 link
->network
= network_ref(network
);
1265 link_update_operstate(link
, true);
1268 link_set_state(link
, LINK_STATE_INITIALIZED
);
1269 link
->activated
= false;
1271 r
= link_configure(link
);
1278 static int link_reconfigure_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, bool force
) {
1283 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to update link state");
1287 r
= link_reconfigure_impl(link
, force
);
1289 link_enter_failed(link
);
1296 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1297 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ false);
1300 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1301 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ true);
1304 int link_reconfigure(Link
*link
, bool force
) {
1309 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1310 * the function from being called multiple times simultaneously, refuse to reconfigure the
1311 * interface in these cases. */
1312 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
, LINK_STATE_LINGER
))
1313 return 0; /* 0 means no-op. */
1315 r
= link_call_getlink(link
, force
? link_force_reconfigure_handler
: link_reconfigure_handler
);
1319 return 1; /* 1 means the interface will be reconfigured. */
1322 static int link_initialized_and_synced(Link
*link
) {
1326 assert(link
->manager
);
1328 if (link
->manager
->test_mode
) {
1329 log_link_debug(link
, "Running in test mode, refusing to enter initialized state.");
1330 link_set_state(link
, LINK_STATE_UNMANAGED
);
1334 if (link
->state
== LINK_STATE_PENDING
) {
1335 log_link_debug(link
, "Link state is up-to-date");
1336 link_set_state(link
, LINK_STATE_INITIALIZED
);
1338 r
= link_new_bound_by_list(link
);
1342 r
= link_handle_bound_by_list(link
);
1347 return link_reconfigure_impl(link
, /* force = */ false);
1350 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1353 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to wait for the interface to be initialized");
1357 r
= link_initialized_and_synced(link
);
1359 link_enter_failed(link
);
1364 static int link_initialized(Link
*link
, sd_device
*device
) {
1370 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1371 * or sysattrs) may be outdated. */
1372 device_unref_and_replace(link
->dev
, device
);
1374 if (link
->dhcp_client
) {
1375 r
= sd_dhcp_client_attach_device(link
->dhcp_client
, link
->dev
);
1377 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv4 client, ignoring: %m");
1380 if (link
->dhcp6_client
) {
1381 r
= sd_dhcp6_client_attach_device(link
->dhcp6_client
, link
->dev
);
1383 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv6 client, ignoring: %m");
1386 r
= link_set_sr_iov_ifindices(link
);
1388 log_link_warning_errno(link
, r
, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1390 if (link
->state
!= LINK_STATE_PENDING
)
1391 return link_reconfigure(link
, /* force = */ false);
1393 log_link_debug(link
, "udev initialized link");
1395 /* udev has initialized the link, but we don't know if we have yet
1396 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1397 * when it returns we know that the pending NEWLINKs have already been
1398 * processed and that we are up-to-date */
1400 return link_call_getlink(link
, link_initialized_handler
);
1403 static int link_check_initialized(Link
*link
) {
1404 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
1409 if (!udev_available())
1410 return link_initialized_and_synced(link
);
1412 /* udev should be around */
1413 r
= sd_device_new_from_ifindex(&device
, link
->ifindex
);
1415 log_link_debug_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
1419 r
= sd_device_get_is_initialized(device
);
1421 return log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
1424 log_link_debug(link
, "link pending udev initialization...");
1428 r
= device_is_renaming(device
);
1430 return log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
1432 log_link_debug(link
, "Interface is being renamed, pending initialization.");
1436 return link_initialized(link
, device
);
1439 int manager_udev_process_link(Manager
*m
, sd_device
*device
, sd_device_action_t action
) {
1446 r
= sd_device_get_ifindex(device
, &ifindex
);
1448 return log_device_debug_errno(device
, r
, "Failed to get ifindex: %m");
1450 r
= link_get_by_index(m
, ifindex
, &link
);
1452 /* This error is not critical, as the corresponding rtnl message may be received later. */
1453 log_device_debug_errno(device
, r
, "Failed to get link from ifindex %i, ignoring: %m", ifindex
);
1457 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1458 * object here. It will be removed only when rtnetlink says so. */
1459 if (action
== SD_DEVICE_REMOVE
) {
1460 link
->dev
= sd_device_unref(link
->dev
);
1464 r
= device_is_renaming(device
);
1466 return log_device_debug_errno(device
, r
, "Failed to determine if the device is renaming or not: %m");
1468 log_device_debug(device
, "Device is renaming, waiting for the interface to be renamed.");
1470 * What happens when a device is initialized, then soon renamed after that? When we detect
1471 * such, maybe we should cancel or postpone all queued requests for the interface. */
1475 r
= link_initialized(link
, device
);
1477 link_enter_failed(link
);
1482 static int link_carrier_gained(Link
*link
) {
1483 bool force_reconfigure
;
1488 r
= event_source_disable(link
->carrier_lost_timer
);
1490 log_link_warning_errno(link
, r
, "Failed to disable carrier lost timer, ignoring: %m");
1492 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1493 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1494 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1495 * restarted, and the correct network information will be gained.
1497 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1498 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1499 * already assigned to the interface (in that case, the .network file does not have the SSID=
1500 * setting in the [Match] section), and the interface is already being configured. Of course,
1501 * there may exist another .network file with higher priority and a matching SSID= setting. But
1502 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1504 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1505 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1506 force_reconfigure
= link
->previous_ssid
&& !streq_ptr(link
->previous_ssid
, link
->ssid
);
1507 link
->previous_ssid
= mfree(link
->previous_ssid
);
1509 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1510 * profile wants to match on it with SSID= in its [Match] section.
1512 if (IN_SET(link
->wlan_iftype
, NL80211_IFTYPE_AP
, NL80211_IFTYPE_P2P_GO
)) {
1513 r
= link_get_wlan_interface(link
);
1518 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1519 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1520 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1521 r
= link_reconfigure_impl(link
, force_reconfigure
);
1525 r
= link_handle_bound_by_list(link
);
1529 if (link
->iftype
== ARPHRD_CAN
)
1530 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1533 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
1534 r
= link_acquire_dynamic_conf(link
);
1538 r
= link_request_static_configs(link
);
1546 static int link_carrier_lost_impl(Link
*link
) {
1551 link
->previous_ssid
= mfree(link
->previous_ssid
);
1553 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1559 r
= link_stop_engines(link
, false);
1563 r
= link_drop_managed_config(link
);
1564 if (r
< 0 && ret
>= 0)
1570 static int link_carrier_lost_handler(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
1571 Link
*link
= ASSERT_PTR(userdata
);
1574 r
= link_carrier_lost_impl(link
);
1576 log_link_warning_errno(link
, r
, "Failed to process carrier lost event: %m");
1577 link_enter_failed(link
);
1583 static int link_carrier_lost(Link
*link
) {
1590 r
= link_handle_bound_by_list(link
);
1594 if (link
->iftype
== ARPHRD_CAN
)
1595 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1601 if (link
->network
->ignore_carrier_loss_set
)
1602 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1603 usec
= link
->network
->ignore_carrier_loss_usec
;
1605 else if (link
->network
->bond
&& link
->wlan_iftype
> 0)
1606 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1607 * carrier to be lost. See #19832. */
1608 usec
= 3 * USEC_PER_SEC
;
1610 else if (link
->network
->dhcp_use_mtu
&&
1612 sd_dhcp_lease_get_mtu(link
->dhcp_lease
, &dhcp_mtu
) >= 0 &&
1613 dhcp_mtu
!= link
->original_mtu
)
1614 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1615 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1616 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1617 usec
= 5 * USEC_PER_SEC
;
1620 /* Otherwise, use the currently set value. */
1621 usec
= link
->network
->ignore_carrier_loss_usec
;
1623 if (usec
== USEC_INFINITY
)
1627 return link_carrier_lost_impl(link
);
1629 return event_reset_time_relative(link
->manager
->event
,
1630 &link
->carrier_lost_timer
,
1634 link_carrier_lost_handler
,
1637 "link-carrier-loss",
1641 static int link_admin_state_up(Link
*link
) {
1646 /* This is called every time an interface admin state changes to up;
1647 * specifically, when IFF_UP flag changes from unset to set. */
1652 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_DOWN
) {
1653 log_link_info(link
, "Activation policy is \"always-down\", forcing link down.");
1654 return link_request_to_bring_up_or_down(link
, /* up = */ false);
1657 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1658 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1659 r
= link_set_ipv6_mtu(link
);
1661 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU, ignoring: %m");
1666 static int link_admin_state_down(Link
*link
) {
1672 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_UP
) {
1673 log_link_info(link
, "Activation policy is \"always-up\", forcing link up.");
1674 return link_request_to_bring_up_or_down(link
, /* up = */ true);
1680 static bool link_is_enslaved(Link
*link
) {
1681 if (link
->flags
& IFF_SLAVE
)
1684 if (link
->master_ifindex
> 0)
1690 static LinkAddressState
address_state_from_scope(uint8_t scope
) {
1691 if (scope
< RT_SCOPE_SITE
)
1692 /* universally accessible addresses found */
1693 return LINK_ADDRESS_STATE_ROUTABLE
;
1695 if (scope
< RT_SCOPE_HOST
)
1696 /* only link or site local addresses found */
1697 return LINK_ADDRESS_STATE_DEGRADED
;
1699 /* no useful addresses found */
1700 return LINK_ADDRESS_STATE_OFF
;
1703 void link_update_operstate(Link
*link
, bool also_update_master
) {
1704 LinkOperationalState operstate
;
1705 LinkCarrierState carrier_state
;
1706 LinkAddressState ipv4_address_state
, ipv6_address_state
, address_state
;
1707 LinkOnlineState online_state
;
1708 _cleanup_strv_free_
char **p
= NULL
;
1709 uint8_t ipv4_scope
= RT_SCOPE_NOWHERE
, ipv6_scope
= RT_SCOPE_NOWHERE
;
1710 bool changed
= false;
1715 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
1716 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
1717 else if (link_has_carrier(link
)) {
1718 if (link_is_enslaved(link
))
1719 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
1721 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
1722 } else if (link
->flags
& IFF_UP
)
1723 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
1725 carrier_state
= LINK_CARRIER_STATE_OFF
;
1727 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
1730 SET_FOREACH(slave
, link
->slaves
) {
1731 link_update_operstate(slave
, false);
1733 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
1734 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
1738 SET_FOREACH(address
, link
->addresses
) {
1739 if (!address_is_ready(address
))
1742 if (address
->family
== AF_INET
)
1743 ipv4_scope
= MIN(ipv4_scope
, address
->scope
);
1745 if (address
->family
== AF_INET6
)
1746 ipv6_scope
= MIN(ipv6_scope
, address
->scope
);
1749 ipv4_address_state
= address_state_from_scope(ipv4_scope
);
1750 ipv6_address_state
= address_state_from_scope(ipv6_scope
);
1751 address_state
= address_state_from_scope(MIN(ipv4_scope
, ipv6_scope
));
1753 /* Mapping of address and carrier state vs operational state
1755 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1756 * ------------------------------------------------------------------------------
1757 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1758 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1759 * routable | off | no-carrier | dormant | routable | routable | routable
1762 if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1763 operstate
= LINK_OPERSTATE_ROUTABLE
;
1764 else if (carrier_state
== LINK_CARRIER_STATE_DEGRADED_CARRIER
&& address_state
== LINK_ADDRESS_STATE_DEGRADED
)
1765 operstate
= LINK_OPERSTATE_DEGRADED
;
1766 else if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
1767 operstate
= (LinkOperationalState
) carrier_state
;
1768 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1769 operstate
= LINK_OPERSTATE_ROUTABLE
;
1770 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
1771 operstate
= LINK_OPERSTATE_DEGRADED
;
1773 operstate
= LINK_OPERSTATE_ENSLAVED
;
1775 /* Only determine online state for managed links with RequiredForOnline=yes */
1776 if (!link
->network
|| !link
->network
->required_for_online
)
1777 online_state
= _LINK_ONLINE_STATE_INVALID
;
1778 else if (operstate
< link
->network
->required_operstate_for_online
.min
||
1779 operstate
> link
->network
->required_operstate_for_online
.max
)
1780 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1782 AddressFamily required_family
= link
->network
->required_family_for_online
;
1783 bool needs_ipv4
= required_family
& ADDRESS_FAMILY_IPV4
;
1784 bool needs_ipv6
= required_family
& ADDRESS_FAMILY_IPV6
;
1786 /* The operational state is within the range required for online.
1787 * If a particular address family is also required, we might revert
1788 * to offline in the blocks below. */
1789 online_state
= LINK_ONLINE_STATE_ONLINE
;
1791 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_DEGRADED
) {
1792 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1793 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1794 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1795 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1798 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_ROUTABLE
) {
1799 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1800 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1801 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1802 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1806 if (link
->carrier_state
!= carrier_state
) {
1807 link
->carrier_state
= carrier_state
;
1809 if (strv_extend(&p
, "CarrierState") < 0)
1813 if (link
->address_state
!= address_state
) {
1814 link
->address_state
= address_state
;
1816 if (strv_extend(&p
, "AddressState") < 0)
1820 if (link
->ipv4_address_state
!= ipv4_address_state
) {
1821 link
->ipv4_address_state
= ipv4_address_state
;
1823 if (strv_extend(&p
, "IPv4AddressState") < 0)
1827 if (link
->ipv6_address_state
!= ipv6_address_state
) {
1828 link
->ipv6_address_state
= ipv6_address_state
;
1830 if (strv_extend(&p
, "IPv6AddressState") < 0)
1834 if (link
->operstate
!= operstate
) {
1835 link
->operstate
= operstate
;
1837 if (strv_extend(&p
, "OperationalState") < 0)
1841 if (link
->online_state
!= online_state
) {
1842 link
->online_state
= online_state
;
1844 if (strv_extend(&p
, "OnlineState") < 0)
1849 link_send_changed_strv(link
, p
);
1853 if (also_update_master
) {
1856 if (link_get_master(link
, &master
) >= 0)
1857 link_update_operstate(master
, true);
1861 #define FLAG_STRING(string, flag, old, new) \
1862 (((old ^ new) & flag) \
1863 ? ((old & flag) ? (" -" string) : (" +" string)) \
1866 static int link_update_flags(Link
*link
, sd_netlink_message
*message
) {
1867 bool link_was_admin_up
, had_carrier
;
1875 r
= sd_rtnl_message_link_get_flags(message
, &flags
);
1877 return log_link_debug_errno(link
, r
, "rtnl: failed to read link flags: %m");
1879 r
= sd_netlink_message_read_u8(message
, IFLA_OPERSTATE
, &operstate
);
1881 /* If we got a message without operstate, assume the state was unchanged. */
1882 operstate
= link
->kernel_operstate
;
1884 return log_link_debug_errno(link
, r
, "rtnl: failed to read operational state: %m");
1886 if (link
->flags
== flags
&& link
->kernel_operstate
== operstate
)
1889 if (link
->flags
!= flags
) {
1890 unsigned unknown_flags
, unknown_flags_added
, unknown_flags_removed
;
1892 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",
1893 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
1894 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
1895 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
1896 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
1897 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
1898 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
1899 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
1900 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
1901 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
1902 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
1903 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
1904 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
1905 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
1906 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
1907 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
1908 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
1909 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
1910 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
1911 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
1913 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
1914 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
1915 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
1916 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
1917 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
1918 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
1919 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
1920 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
1922 if (unknown_flags_added
)
1923 log_link_debug(link
, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added
);
1925 if (unknown_flags_removed
)
1926 log_link_debug(link
, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed
);
1929 link_was_admin_up
= link
->flags
& IFF_UP
;
1930 had_carrier
= link_has_carrier(link
);
1932 link
->flags
= flags
;
1933 link
->kernel_operstate
= operstate
;
1935 link_update_operstate(link
, true);
1937 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
1938 log_link_info(link
, "Link UP");
1940 r
= link_admin_state_up(link
);
1943 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
)) {
1944 log_link_info(link
, "Link DOWN");
1946 r
= link_admin_state_down(link
);
1951 if (!had_carrier
&& link_has_carrier(link
)) {
1952 log_link_info(link
, "Gained carrier");
1954 r
= link_carrier_gained(link
);
1957 } else if (had_carrier
&& !link_has_carrier(link
)) {
1958 log_link_info(link
, "Lost carrier");
1960 r
= link_carrier_lost(link
);
1968 static int link_update_master(Link
*link
, sd_netlink_message
*message
) {
1969 int master_ifindex
, r
;
1974 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t*) &master_ifindex
);
1978 return log_link_debug_errno(link
, r
, "rtnl: failed to read master ifindex: %m");
1980 if (master_ifindex
== link
->ifindex
)
1983 if (master_ifindex
== link
->master_ifindex
)
1986 if (link
->master_ifindex
== 0)
1987 log_link_debug(link
, "Attached to master interface: %i", master_ifindex
);
1988 else if (master_ifindex
== 0)
1989 log_link_debug(link
, "Detached from master interface: %i", link
->master_ifindex
);
1991 log_link_debug(link
, "Master interface changed: %i %s %i", link
->master_ifindex
,
1992 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), master_ifindex
);
1994 link_drop_from_master(link
);
1996 link
->master_ifindex
= master_ifindex
;
1998 r
= link_append_to_master(link
);
2000 return log_link_debug_errno(link
, r
, "Failed to append link to master: %m");
2005 static int link_update_driver(Link
*link
, sd_netlink_message
*message
) {
2009 assert(link
->manager
);
2012 /* Driver is already read. Assuming the driver is never changed. */
2013 if (link
->ethtool_driver_read
)
2016 /* When udevd is running, read the driver after the interface is initialized by udevd.
2017 * Otherwise, ethtool may not work correctly. See issue #22538.
2018 * When udevd is not running, read the value when the interface is detected. */
2019 if (udev_available() && !link
->dev
)
2022 link
->ethtool_driver_read
= true;
2024 r
= ethtool_get_driver(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
2026 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
2030 log_link_debug(link
, "Found driver: %s", strna(link
->driver
));
2032 if (streq_ptr(link
->driver
, "dsa")) {
2033 uint32_t dsa_master_ifindex
= 0;
2035 r
= sd_netlink_message_read_u32(message
, IFLA_LINK
, &dsa_master_ifindex
);
2036 if (r
< 0 && r
!= -ENODATA
)
2037 return log_link_debug_errno(link
, r
, "rtnl: failed to read ifindex of the DSA master interface: %m");
2039 if (dsa_master_ifindex
> INT_MAX
) {
2040 log_link_debug(link
, "rtnl: received too large DSA master ifindex (%"PRIu32
" > INT_MAX), ignoring.",
2041 dsa_master_ifindex
);
2042 dsa_master_ifindex
= 0;
2045 link
->dsa_master_ifindex
= (int) dsa_master_ifindex
;
2048 return 1; /* needs reconfigure */
2051 static int link_update_permanent_hardware_address_from_ethtool(Link
*link
, sd_netlink_message
*message
) {
2055 assert(link
->manager
);
2058 if (link
->ethtool_permanent_hw_addr_read
)
2061 /* When udevd is running, read the permanent hardware address after the interface is
2062 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2063 * When udevd is not running, read the value when the interface is detected. */
2064 if (udev_available() && !link
->dev
)
2067 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2068 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, NULL
);
2072 return log_link_debug_errno(link
, r
, "Failed to read IFLA_ADDRESS attribute: %m");
2074 link
->ethtool_permanent_hw_addr_read
= true;
2076 r
= ethtool_get_permanent_hw_addr(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->permanent_hw_addr
);
2078 log_link_debug_errno(link
, r
, "Permanent hardware address not found, continuing without: %m");
2083 static int link_update_permanent_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2087 assert(link
->manager
);
2090 if (link
->permanent_hw_addr
.length
> 0)
2093 r
= netlink_message_read_hw_addr(message
, IFLA_PERM_ADDRESS
, &link
->permanent_hw_addr
);
2096 return log_link_debug_errno(link
, r
, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2098 /* Fallback to ethtool for older kernels. */
2099 r
= link_update_permanent_hardware_address_from_ethtool(link
, message
);
2104 if (link
->permanent_hw_addr
.length
> 0)
2105 log_link_debug(link
, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link
->permanent_hw_addr
));
2107 return 1; /* needs reconfigure */
2110 static int link_update_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2111 struct hw_addr_data addr
;
2117 r
= netlink_message_read_hw_addr(message
, IFLA_BROADCAST
, &link
->bcast_addr
);
2118 if (r
< 0 && r
!= -ENODATA
)
2119 return log_link_debug_errno(link
, r
, "rtnl: failed to read broadcast address: %m");
2121 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, &addr
);
2125 return log_link_debug_errno(link
, r
, "rtnl: failed to read hardware address: %m");
2127 if (hw_addr_equal(&link
->hw_addr
, &addr
))
2130 if (link
->hw_addr
.length
== 0)
2131 log_link_debug(link
, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr
));
2133 log_link_debug(link
, "Hardware address is changed: %s %s %s",
2134 HW_ADDR_TO_STR(&link
->hw_addr
),
2135 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
),
2136 HW_ADDR_TO_STR(&addr
));
2138 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2141 link
->hw_addr
= addr
;
2143 if (!hw_addr_is_null(&link
->hw_addr
)) {
2144 r
= hashmap_ensure_put(&link
->manager
->links_by_hw_addr
, &hw_addr_hash_ops
, &link
->hw_addr
, link
);
2145 if (r
== -EEXIST
&& streq_ptr(link
->kind
, "bond"))
2146 /* bonding master and its slaves have the same hardware address. */
2147 r
= hashmap_replace(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2149 log_link_debug_errno(link
, r
, "Failed to manage link by its new hardware address, ignoring: %m");
2152 r
= ipv4acd_update_mac(link
);
2154 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4 ACD client: %m");
2156 r
= ipv4ll_update_mac(link
);
2158 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2160 r
= dhcp4_update_mac(link
);
2162 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2164 r
= dhcp6_update_mac(link
);
2166 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2168 r
= radv_update_mac(link
);
2170 return log_link_debug_errno(link
, r
, "Could not update MAC address for Router Advertisement: %m");
2172 if (link
->ndisc
&& link
->hw_addr
.length
== ETH_ALEN
) {
2173 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->hw_addr
.ether
);
2175 return log_link_debug_errno(link
, r
, "Could not update MAC for NDisc: %m");
2178 if (link
->lldp_rx
) {
2179 r
= sd_lldp_rx_set_filter_address(link
->lldp_rx
, &link
->hw_addr
.ether
);
2181 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Rx: %m");
2184 if (link
->lldp_tx
) {
2185 r
= sd_lldp_tx_set_hwaddr(link
->lldp_tx
, &link
->hw_addr
.ether
);
2187 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Tx: %m");
2190 return 1; /* needs reconfigure */
2193 static int link_update_mtu(Link
*link
, sd_netlink_message
*message
) {
2194 uint32_t mtu
, min_mtu
= 0, max_mtu
= UINT32_MAX
;
2200 r
= sd_netlink_message_read_u32(message
, IFLA_MTU
, &mtu
);
2204 return log_link_debug_errno(link
, r
, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2208 r
= sd_netlink_message_read_u32(message
, IFLA_MIN_MTU
, &min_mtu
);
2209 if (r
< 0 && r
!= -ENODATA
)
2210 return log_link_debug_errno(link
, r
, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2212 r
= sd_netlink_message_read_u32(message
, IFLA_MAX_MTU
, &max_mtu
);
2213 if (r
< 0 && r
!= -ENODATA
)
2214 return log_link_debug_errno(link
, r
, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2217 max_mtu
= UINT32_MAX
;
2219 link
->min_mtu
= min_mtu
;
2220 link
->max_mtu
= max_mtu
;
2222 if (link
->original_mtu
== 0) {
2223 link
->original_mtu
= mtu
;
2224 log_link_debug(link
, "Saved original MTU %" PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2225 link
->original_mtu
, link
->min_mtu
, link
->max_mtu
);
2228 if (link
->mtu
== mtu
)
2232 log_link_debug(link
, "MTU is changed: %"PRIu32
" %s %"PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2233 link
->mtu
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), mtu
,
2234 link
->min_mtu
, link
->max_mtu
);
2238 if (link
->dhcp_client
) {
2239 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
, link
->mtu
);
2241 return log_link_debug_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2245 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
2247 return log_link_debug_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
2253 static int link_update_alternative_names(Link
*link
, sd_netlink_message
*message
) {
2254 _cleanup_strv_free_
char **altnames
= NULL
;
2260 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &altnames
);
2262 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2263 * interface has no alternative name. */
2266 return log_link_debug_errno(link
, r
, "rtnl: failed to read alternative names: %m");
2268 if (strv_equal(altnames
, link
->alternative_names
))
2271 STRV_FOREACH(n
, link
->alternative_names
)
2272 hashmap_remove(link
->manager
->links_by_name
, *n
);
2274 strv_free_and_replace(link
->alternative_names
, altnames
);
2276 STRV_FOREACH(n
, link
->alternative_names
) {
2277 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, *n
, link
);
2279 return log_link_debug_errno(link
, r
, "Failed to manage link by its new alternative names: %m");
2282 return 1; /* needs reconfigure */
2285 static int link_update_name(Link
*link
, sd_netlink_message
*message
) {
2286 char ifname_from_index
[IF_NAMESIZE
];
2293 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
2298 return log_link_debug_errno(link
, r
, "Failed to read interface name in RTM_NEWLINK message: %m");
2300 if (streq(ifname
, link
->ifname
))
2303 r
= format_ifname(link
->ifindex
, ifname_from_index
);
2305 return log_link_debug_errno(link
, r
, "Could not get interface name for index %i.", link
->ifindex
);
2307 if (!streq(ifname
, ifname_from_index
)) {
2308 log_link_debug(link
, "New interface name '%s' received from the kernel does not correspond "
2309 "with the name currently configured on the actual interface '%s'. Ignoring.",
2310 ifname
, ifname_from_index
);
2314 log_link_info(link
, "Interface name change detected, renamed to %s.", ifname
);
2316 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
2318 r
= free_and_strdup(&link
->ifname
, ifname
);
2320 return log_oom_debug();
2322 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2324 return log_link_debug_errno(link
, r
, "Failed to manage link by its new name: %m");
2326 if (link
->dhcp_client
) {
2327 r
= sd_dhcp_client_set_ifname(link
->dhcp_client
, link
->ifname
);
2329 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP client: %m");
2332 if (link
->dhcp6_client
) {
2333 r
= sd_dhcp6_client_set_ifname(link
->dhcp6_client
, link
->ifname
);
2335 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP6 client: %m");
2339 r
= sd_ndisc_set_ifname(link
->ndisc
, link
->ifname
);
2341 return log_link_debug_errno(link
, r
, "Failed to update interface name in NDisc: %m");
2344 if (link
->dhcp_server
) {
2345 r
= sd_dhcp_server_set_ifname(link
->dhcp_server
, link
->ifname
);
2347 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP server: %m");
2351 r
= sd_radv_set_ifname(link
->radv
, link
->ifname
);
2353 return log_link_debug_errno(link
, r
, "Failed to update interface name in Router Advertisement: %m");
2356 if (link
->lldp_rx
) {
2357 r
= sd_lldp_rx_set_ifname(link
->lldp_rx
, link
->ifname
);
2359 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Rx: %m");
2362 if (link
->lldp_tx
) {
2363 r
= sd_lldp_tx_set_ifname(link
->lldp_tx
, link
->ifname
);
2365 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Tx: %m");
2369 r
= sd_ipv4ll_set_ifname(link
->ipv4ll
, link
->ifname
);
2371 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4LL client: %m");
2374 r
= ipv4acd_set_ifname(link
);
2376 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4ACD client: %m");
2378 return 1; /* needs reconfigure */
2381 static int link_update(Link
*link
, sd_netlink_message
*message
) {
2382 bool needs_reconfigure
= false;
2388 r
= link_update_name(link
, message
);
2391 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2393 r
= link_update_alternative_names(link
, message
);
2396 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2398 r
= link_update_mtu(link
, message
);
2402 r
= link_update_driver(link
, message
);
2405 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2407 r
= link_update_permanent_hardware_address(link
, message
);
2410 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2412 r
= link_update_hardware_address(link
, message
);
2415 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2417 r
= link_update_master(link
, message
);
2421 r
= link_update_ipv6ll_addrgen_mode(link
, message
);
2425 r
= link_update_flags(link
, message
);
2429 return needs_reconfigure
;
2432 static Link
*link_drop_or_unref(Link
*link
) {
2436 return link_unref(link
);
2437 return link_drop(link
);
2440 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_drop_or_unref
);
2442 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
2443 _cleanup_free_
char *ifname
= NULL
, *kind
= NULL
, *state_file
= NULL
, *lease_file
= NULL
, *lldp_file
= NULL
;
2444 _cleanup_(link_drop_or_unrefp
) Link
*link
= NULL
;
2445 unsigned short iftype
;
2452 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2454 return log_debug_errno(r
, "rtnl: failed to read ifindex from link message: %m");
2455 else if (ifindex
<= 0)
2456 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "rtnl: received link message without valid ifindex.");
2458 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
2460 return log_debug_errno(r
, "rtnl: failed to read interface type from link message: %m");
2462 r
= sd_netlink_message_read_string_strdup(message
, IFLA_IFNAME
, &ifname
);
2464 return log_debug_errno(r
, "rtnl: failed to read interface name from link message: %m");
2466 /* check for link kind */
2467 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
2469 r
= sd_netlink_message_read_string_strdup(message
, IFLA_INFO_KIND
, &kind
);
2470 if (r
< 0 && r
!= -ENODATA
)
2471 return log_debug_errno(r
, "rtnl: failed to read interface kind from link message: %m");
2472 r
= sd_netlink_message_exit_container(message
);
2474 return log_debug_errno(r
, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2477 if (!manager
->test_mode
) {
2478 /* Do not update state files when running in test mode. */
2479 if (asprintf(&state_file
, "/run/systemd/netif/links/%d", ifindex
) < 0)
2480 return log_oom_debug();
2482 if (asprintf(&lease_file
, "/run/systemd/netif/leases/%d", ifindex
) < 0)
2483 return log_oom_debug();
2485 if (asprintf(&lldp_file
, "/run/systemd/netif/lldp/%d", ifindex
) < 0)
2486 return log_oom_debug();
2489 link
= new(Link
, 1);
2495 .state
= LINK_STATE_PENDING
,
2496 .online_state
= _LINK_ONLINE_STATE_INVALID
,
2499 .ifname
= TAKE_PTR(ifname
),
2500 .kind
= TAKE_PTR(kind
),
2502 .ipv6ll_address_gen_mode
= _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID
,
2504 .state_file
= TAKE_PTR(state_file
),
2505 .lease_file
= TAKE_PTR(lease_file
),
2506 .lldp_file
= TAKE_PTR(lldp_file
),
2509 .dns_default_route
= -1,
2510 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
2511 .mdns
= _RESOLVE_SUPPORT_INVALID
,
2512 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
2513 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
2516 r
= hashmap_ensure_put(&manager
->links_by_index
, NULL
, INT_TO_PTR(link
->ifindex
), link
);
2518 return log_link_debug_errno(link
, r
, "Failed to store link into manager: %m");
2520 link
->manager
= manager
;
2522 r
= hashmap_ensure_put(&manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2524 return log_link_debug_errno(link
, r
, "Failed to manage link by its interface name: %m");
2526 log_link_debug(link
, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2527 link
->ifindex
, strna(arphrd_to_name(link
->iftype
)), link
->iftype
, strna(link
->kind
));
2529 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2530 * message arrived too early. Request the wireless link information again.
2532 if (set_remove(manager
->new_wlan_ifindices
, INT_TO_PTR(link
->ifindex
))) {
2533 r
= link_get_wlan_interface(link
);
2535 log_link_warning_errno(link
, r
, "Failed to get wireless interface, ignoring: %m");
2538 *ret
= TAKE_PTR(link
);
2542 int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, Manager
*manager
) {
2544 NetDev
*netdev
= NULL
;
2553 if (sd_netlink_message_is_error(message
)) {
2554 r
= sd_netlink_message_get_errno(message
);
2556 log_message_warning_errno(message
, r
, "rtnl: Could not receive link message, ignoring");
2561 r
= sd_netlink_message_get_type(message
, &type
);
2563 log_warning_errno(r
, "rtnl: Could not get message type, ignoring: %m");
2565 } else if (!IN_SET(type
, RTM_NEWLINK
, RTM_DELLINK
)) {
2566 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type
);
2570 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2572 log_warning_errno(r
, "rtnl: Could not get ifindex from link message, ignoring: %m");
2574 } else if (ifindex
<= 0) {
2575 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex
);
2579 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
2581 log_warning_errno(r
, "rtnl: Received link message without ifname, ignoring: %m");
2585 (void) link_get_by_index(manager
, ifindex
, &link
);
2586 (void) netdev_get(manager
, name
, &netdev
);
2591 /* netdev exists, so make sure the ifindex matches */
2592 r
= netdev_set_ifindex(netdev
, message
);
2594 log_netdev_warning_errno(netdev
, r
, "Could not process new link message for netdev, ignoring: %m");
2600 /* link is new, so add it */
2601 r
= link_new(manager
, message
, &link
);
2603 log_warning_errno(r
, "Could not process new link message: %m");
2607 r
= link_update(link
, message
);
2609 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2610 link_enter_failed(link
);
2614 r
= link_check_initialized(link
);
2616 log_link_warning_errno(link
, r
, "Failed to check link is initialized: %m");
2617 link_enter_failed(link
);
2621 r
= link_update(link
, message
);
2623 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2624 link_enter_failed(link
);
2628 r
= link_reconfigure_impl(link
, /* force = */ false);
2630 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
2631 link_enter_failed(link
);
2640 netdev_drop(netdev
);
2644 assert_not_reached();
2650 int link_getlink_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, const char *error_msg
) {
2651 uint16_t message_type
;
2658 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2661 r
= sd_netlink_message_get_errno(m
);
2663 log_link_message_warning_errno(link
, m
, r
, error_msg
);
2664 link_enter_failed(link
);
2668 r
= sd_netlink_message_get_type(m
, &message_type
);
2670 log_link_debug_errno(link
, r
, "rtnl: failed to read link message type, ignoring: %m");
2673 if (message_type
!= RTM_NEWLINK
) {
2674 log_link_debug(link
, "rtnl: received invalid link message type, ignoring.");
2678 r
= link_update(link
, m
);
2680 link_enter_failed(link
);
2687 int link_call_getlink(Link
*link
, link_netlink_message_handler_t callback
) {
2688 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2692 assert(link
->manager
);
2693 assert(link
->manager
->rtnl
);
2696 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
, link
->ifindex
);
2700 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
,
2701 link_netlink_destroy_callback
, link
);
2709 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
2710 [LINK_STATE_PENDING
] = "pending",
2711 [LINK_STATE_INITIALIZED
] = "initialized",
2712 [LINK_STATE_CONFIGURING
] = "configuring",
2713 [LINK_STATE_CONFIGURED
] = "configured",
2714 [LINK_STATE_UNMANAGED
] = "unmanaged",
2715 [LINK_STATE_FAILED
] = "failed",
2716 [LINK_STATE_LINGER
] = "linger",
2719 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
2721 int link_flags_to_string_alloc(uint32_t flags
, char **ret
) {
2722 _cleanup_free_
char *str
= NULL
;
2723 static const char* map
[] = {
2724 [LOG2U(IFF_UP
)] = "up", /* interface is up. */
2725 [LOG2U(IFF_BROADCAST
)] = "broadcast", /* broadcast address valid. */
2726 [LOG2U(IFF_DEBUG
)] = "debug", /* turn on debugging. */
2727 [LOG2U(IFF_LOOPBACK
)] = "loopback", /* interface is a loopback net. */
2728 [LOG2U(IFF_POINTOPOINT
)] = "point-to-point", /* interface has p-p link. */
2729 [LOG2U(IFF_NOTRAILERS
)] = "no-trailers", /* avoid use of trailers. */
2730 [LOG2U(IFF_RUNNING
)] = "running", /* interface RFC2863 OPER_UP. */
2731 [LOG2U(IFF_NOARP
)] = "no-arp", /* no ARP protocol. */
2732 [LOG2U(IFF_PROMISC
)] = "promiscuous", /* receive all packets. */
2733 [LOG2U(IFF_ALLMULTI
)] = "all-multicast", /* receive all multicast packets. */
2734 [LOG2U(IFF_MASTER
)] = "master", /* master of a load balancer. */
2735 [LOG2U(IFF_SLAVE
)] = "slave", /* slave of a load balancer. */
2736 [LOG2U(IFF_MULTICAST
)] = "multicast", /* supports multicast. */
2737 [LOG2U(IFF_PORTSEL
)] = "portsel", /* can set media type. */
2738 [LOG2U(IFF_AUTOMEDIA
)] = "auto-media", /* auto media select active. */
2739 [LOG2U(IFF_DYNAMIC
)] = "dynamic", /* dialup device with changing addresses. */
2740 [LOG2U(IFF_LOWER_UP
)] = "lower-up", /* driver signals L1 up. */
2741 [LOG2U(IFF_DORMANT
)] = "dormant", /* driver signals dormant. */
2742 [LOG2U(IFF_ECHO
)] = "echo", /* echo sent packets. */
2747 for (size_t i
= 0; i
< ELEMENTSOF(map
); i
++)
2748 if (FLAGS_SET(flags
, 1 << i
) && map
[i
])
2749 if (!strextend_with_separator(&str
, ",", map
[i
]))
2752 *ret
= TAKE_PTR(str
);
2756 static const char * const kernel_operstate_table
[] = {
2757 [IF_OPER_UNKNOWN
] = "unknown",
2758 [IF_OPER_NOTPRESENT
] = "not-present",
2759 [IF_OPER_DOWN
] = "down",
2760 [IF_OPER_LOWERLAYERDOWN
] = "lower-layer-down",
2761 [IF_OPER_TESTING
] = "testing",
2762 [IF_OPER_DORMANT
] = "dormant",
2763 [IF_OPER_UP
] = "up",
2766 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate
, int);