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
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
165 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
166 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
168 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
169 link
->ndisc_expire
= sd_event_source_disable_unref(link
->ndisc_expire
);
172 link
->radv
= sd_radv_unref(link
->radv
);
175 static Link
*link_free(Link
*link
) {
178 link_ntp_settings_clear(link
);
179 link_dns_settings_clear(link
);
181 link
->routes
= set_free(link
->routes
);
182 link
->nexthops
= set_free(link
->nexthops
);
183 link
->neighbors
= set_free(link
->neighbors
);
184 link
->addresses
= set_free(link
->addresses
);
185 link
->qdiscs
= set_free(link
->qdiscs
);
186 link
->tclasses
= set_free(link
->tclasses
);
188 link
->dhcp_pd_prefixes
= set_free(link
->dhcp_pd_prefixes
);
190 link_free_engines(link
);
192 set_free(link
->sr_iov_virt_port_ifindices
);
194 strv_free(link
->alternative_names
);
197 free(link
->previous_ssid
);
200 unlink_and_free(link
->lease_file
);
201 unlink_and_free(link
->lldp_file
);
202 unlink_and_free(link
->state_file
);
204 sd_device_unref(link
->dev
);
205 netdev_unref(link
->netdev
);
207 hashmap_free(link
->bound_to_links
);
208 hashmap_free(link
->bound_by_links
);
210 set_free_with_destructor(link
->slaves
, link_unref
);
212 network_unref(link
->network
);
214 sd_event_source_disable_unref(link
->carrier_lost_timer
);
219 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
221 int link_get_by_index(Manager
*m
, int ifindex
, Link
**ret
) {
227 link
= hashmap_get(m
->links_by_index
, INT_TO_PTR(ifindex
));
236 int link_get_by_name(Manager
*m
, const char *ifname
, Link
**ret
) {
242 link
= hashmap_get(m
->links_by_name
, ifname
);
251 int link_get_by_hw_addr(Manager
*m
, const struct hw_addr_data
*hw_addr
, Link
**ret
) {
257 link
= hashmap_get(m
->links_by_hw_addr
, hw_addr
);
266 int link_get_master(Link
*link
, Link
**ret
) {
268 assert(link
->manager
);
271 if (link
->master_ifindex
<= 0 || link
->master_ifindex
== link
->ifindex
)
274 return link_get_by_index(link
->manager
, link
->master_ifindex
, ret
);
277 void link_set_state(Link
*link
, LinkState state
) {
280 if (link
->state
== state
)
283 log_link_debug(link
, "State changed: %s -> %s",
284 link_state_to_string(link
->state
),
285 link_state_to_string(state
));
289 link_send_changed(link
, "AdministrativeState", NULL
);
293 int link_stop_engines(Link
*link
, bool may_keep_dhcp
) {
297 assert(link
->manager
);
298 assert(link
->manager
->event
);
300 bool keep_dhcp
= may_keep_dhcp
&&
302 !link
->network
->dhcp_send_decline
&& /* IPv4 ACD for the DHCPv4 address is running. */
303 (link
->manager
->restarting
||
304 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
307 k
= sd_dhcp_client_stop(link
->dhcp_client
);
309 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
312 k
= sd_dhcp_server_stop(link
->dhcp_server
);
314 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 server: %m");
316 k
= sd_lldp_rx_stop(link
->lldp_rx
);
318 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Rx: %m");
320 k
= sd_lldp_tx_stop(link
->lldp_tx
);
322 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Tx: %m");
324 k
= sd_ipv4ll_stop(link
->ipv4ll
);
326 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
328 k
= ipv4acd_stop(link
);
330 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
332 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
334 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
336 k
= dhcp_pd_remove(link
, /* only_marked = */ false);
338 r
= log_link_warning_errno(link
, k
, "Could not remove DHCPv6 PD addresses and routes: %m");
340 k
= ndisc_stop(link
);
342 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
346 k
= sd_radv_stop(link
->radv
);
348 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
353 void link_enter_failed(Link
*link
) {
356 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
359 log_link_warning(link
, "Failed");
361 link_set_state(link
, LINK_STATE_FAILED
);
363 (void) link_stop_engines(link
, false);
366 void link_check_ready(Link
*link
) {
371 if (link
->state
== LINK_STATE_CONFIGURED
)
374 if (link
->state
!= LINK_STATE_CONFIGURING
)
375 return (void) log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
378 return (void) log_link_debug(link
, "%s(): link is unmanaged.", __func__
);
380 if (!link
->tc_configured
)
381 return (void) log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
383 if (link
->set_link_messages
> 0)
384 return (void) log_link_debug(link
, "%s(): link layer is configuring.", __func__
);
386 if (!link
->activated
)
387 return (void) log_link_debug(link
, "%s(): link is not activated.", __func__
);
389 if (link
->iftype
== ARPHRD_CAN
) {
390 /* let's shortcut things for CAN which doesn't need most of checks below. */
391 link_set_state(link
, LINK_STATE_CONFIGURED
);
395 if (!link
->stacked_netdevs_created
)
396 return (void) log_link_debug(link
, "%s(): stacked netdevs are not created.", __func__
);
398 if (!link
->static_addresses_configured
)
399 return (void) log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
401 SET_FOREACH(a
, link
->addresses
)
402 if (!address_is_ready(a
))
403 return (void) log_link_debug(link
, "%s(): address %s is not ready.", __func__
,
404 IN_ADDR_PREFIX_TO_STRING(a
->family
, &a
->in_addr
, a
->prefixlen
));
406 if (!link
->static_address_labels_configured
)
407 return (void) log_link_debug(link
, "%s(): static address labels are not configured.", __func__
);
409 if (!link
->static_bridge_fdb_configured
)
410 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
412 if (!link
->static_bridge_mdb_configured
)
413 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
415 if (!link
->static_ipv6_proxy_ndp_configured
)
416 return (void) log_link_debug(link
, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__
);
418 if (!link
->static_neighbors_configured
)
419 return (void) log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
421 if (!link
->static_nexthops_configured
)
422 return (void) log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
424 if (!link
->static_routes_configured
)
425 return (void) log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
427 if (!link
->static_routing_policy_rules_configured
)
428 return (void) log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
430 if (!link
->sr_iov_configured
)
431 return (void) log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
433 /* IPv6LL is assigned after the link gains its carrier. */
434 if (!link
->network
->configure_without_carrier
&&
435 link_ipv6ll_enabled(link
) &&
436 !in6_addr_is_set(&link
->ipv6ll_address
))
437 return (void) log_link_debug(link
, "%s(): IPv6LL is not configured yet.", __func__
);
439 bool has_dynamic_address
= false;
440 SET_FOREACH(a
, link
->addresses
) {
441 if (address_is_marked(a
))
443 if (!address_exists(a
))
445 if (IN_SET(a
->source
,
446 NETWORK_CONFIG_SOURCE_IPV4LL
,
447 NETWORK_CONFIG_SOURCE_DHCP4
,
448 NETWORK_CONFIG_SOURCE_DHCP6
,
449 NETWORK_CONFIG_SOURCE_DHCP_PD
,
450 NETWORK_CONFIG_SOURCE_NDISC
)) {
451 has_dynamic_address
= true;
456 if ((link_ipv4ll_enabled(link
) || link_dhcp4_enabled(link
) || link_dhcp6_with_address_enabled(link
) ||
457 (link_dhcp_pd_is_enabled(link
) && link
->network
->dhcp_pd_assign
)) && !has_dynamic_address
)
458 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
459 return (void) log_link_debug(link
, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__
);
461 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
462 if (link_ipv4ll_enabled(link
) || link_dhcp4_enabled(link
) ||
463 link_dhcp6_enabled(link
) || link_dhcp_pd_is_enabled(link
) ||
464 (!link
->network
->configure_without_carrier
&& link_ipv6_accept_ra_enabled(link
))) {
466 if (!link
->ipv4ll_address_configured
&& !link
->dhcp4_configured
&&
467 !link
->dhcp6_configured
&& !link
->dhcp_pd_configured
&& !link
->ndisc_configured
)
468 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
469 return (void) log_link_debug(link
, "%s(): dynamic addresses or routes are not configured.", __func__
);
471 log_link_debug(link
, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
473 yes_no(link
->ipv4ll_address_configured
),
474 yes_no(link
->dhcp4_configured
),
475 yes_no(link
->dhcp6_configured
),
476 yes_no(link
->dhcp_pd_configured
),
477 yes_no(link
->ndisc_configured
));
480 link_set_state(link
, LINK_STATE_CONFIGURED
);
483 static int link_request_static_configs(Link
*link
) {
487 assert(link
->network
);
488 assert(link
->state
!= _LINK_STATE_INVALID
);
490 r
= link_request_static_addresses(link
);
494 r
= link_request_static_address_labels(link
);
498 r
= link_request_static_bridge_fdb(link
);
502 r
= link_request_static_bridge_mdb(link
);
506 r
= link_request_static_ipv6_proxy_ndp_addresses(link
);
510 r
= link_request_static_neighbors(link
);
514 r
= link_request_static_nexthops(link
, false);
518 r
= link_request_static_routes(link
, false);
522 r
= link_request_static_routing_policy_rules(link
);
529 static int link_request_stacked_netdevs(Link
*link
) {
535 link
->stacked_netdevs_created
= false;
537 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
538 r
= link_request_stacked_netdev(link
, netdev
);
543 if (link
->create_stacked_netdev_messages
== 0) {
544 link
->stacked_netdevs_created
= true;
545 link_check_ready(link
);
551 static int link_acquire_dynamic_ipv6_conf(Link
*link
) {
556 r
= radv_start(link
);
558 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Advertisement engine: %m");
560 r
= ndisc_start(link
);
562 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Discovery: %m");
564 r
= dhcp6_start(link
);
566 return log_link_warning_errno(link
, r
, "Failed to start DHCPv6 client: %m");
571 static int link_acquire_dynamic_ipv4_conf(Link
*link
) {
575 assert(link
->manager
);
576 assert(link
->manager
->event
);
578 if (link
->dhcp_client
) {
579 r
= dhcp4_start(link
);
581 return log_link_warning_errno(link
, r
, "Failed to start DHCPv4 client: %m");
583 log_link_debug(link
, "Acquiring DHCPv4 lease.");
585 } else if (link
->ipv4ll
) {
586 if (in4_addr_is_set(&link
->network
->ipv4ll_start_address
)) {
587 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &link
->network
->ipv4ll_start_address
);
589 return log_link_warning_errno(link
, r
, "Could not set IPv4 link-local start address: %m");
592 r
= sd_ipv4ll_start(link
->ipv4ll
);
594 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
596 log_link_debug(link
, "Acquiring IPv4 link-local address.");
599 if (link
->dhcp_server
) {
600 r
= sd_dhcp_server_start(link
->dhcp_server
);
602 return log_link_warning_errno(link
, r
, "Could not start DHCP server: %m");
605 r
= ipv4acd_start(link
);
607 return log_link_warning_errno(link
, r
, "Could not start IPv4 ACD client: %m");
612 static int link_acquire_dynamic_conf(Link
*link
) {
616 assert(link
->network
);
618 r
= link_acquire_dynamic_ipv4_conf(link
);
622 if (in6_addr_is_set(&link
->ipv6ll_address
)) {
623 r
= link_acquire_dynamic_ipv6_conf(link
);
628 if (!link_radv_enabled(link
) || !link
->network
->dhcp_pd_announce
) {
629 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
630 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
631 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
632 * below will be called in radv_start(). */
633 r
= dhcp_request_prefix_delegation(link
);
635 return log_link_warning_errno(link
, r
, "Failed to request DHCP delegated subnet prefix: %m");
639 r
= sd_lldp_tx_start(link
->lldp_tx
);
641 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
645 r
= sd_lldp_rx_start(link
->lldp_rx
);
647 return log_link_warning_errno(link
, r
, "Failed to start LLDP client: %m");
653 int link_ipv6ll_gained(Link
*link
) {
658 log_link_info(link
, "Gained IPv6LL");
660 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
))
663 r
= link_acquire_dynamic_ipv6_conf(link
);
667 link_check_ready(link
);
671 int link_handle_bound_to_list(Link
*link
) {
672 bool required_up
= false;
673 bool link_is_up
= false;
678 /* If at least one interface in bound_to_links has carrier, then make this interface up.
679 * If all interfaces in bound_to_links do not, then make this interface down. */
681 if (hashmap_isempty(link
->bound_to_links
))
684 if (link
->flags
& IFF_UP
)
687 HASHMAP_FOREACH(l
, link
->bound_to_links
)
688 if (link_has_carrier(l
)) {
693 if (!required_up
&& link_is_up
)
694 return link_request_to_bring_up_or_down(link
, /* up = */ false);
695 if (required_up
&& !link_is_up
)
696 return link_request_to_bring_up_or_down(link
, /* up = */ true);
701 static int link_handle_bound_by_list(Link
*link
) {
707 /* Update up or down state of interfaces which depend on this interface's carrier state. */
709 if (hashmap_isempty(link
->bound_by_links
))
712 HASHMAP_FOREACH(l
, link
->bound_by_links
) {
713 r
= link_handle_bound_to_list(l
);
721 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
730 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
733 r
= hashmap_ensure_put(h
, NULL
, INT_TO_PTR(carrier
->ifindex
), carrier
);
742 static int link_new_bound_by_list(Link
*link
) {
748 assert(link
->manager
);
752 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
753 if (!carrier
->network
)
756 if (strv_isempty(carrier
->network
->bind_carrier
))
759 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
760 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
766 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
767 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
775 static int link_new_bound_to_list(Link
*link
) {
781 assert(link
->manager
);
786 if (strv_isempty(link
->network
->bind_carrier
))
791 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
792 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
793 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
799 HASHMAP_FOREACH(carrier
, link
->bound_to_links
) {
800 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
808 static void link_free_bound_to_list(Link
*link
) {
809 bool updated
= false;
814 while ((bound_to
= hashmap_steal_first(link
->bound_to_links
))) {
817 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
818 link_dirty(bound_to
);
825 static void link_free_bound_by_list(Link
*link
) {
826 bool updated
= false;
831 while ((bound_by
= hashmap_steal_first(link
->bound_by_links
))) {
834 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
835 link_dirty(bound_by
);
836 link_handle_bound_to_list(bound_by
);
844 static int link_append_to_master(Link
*link
) {
850 /* - The link may have no master.
851 * - RTM_NEWLINK message about master interface may not be received yet. */
852 if (link_get_master(link
, &master
) < 0)
855 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
863 static void link_drop_from_master(Link
*link
) {
871 if (link_get_master(link
, &master
) < 0)
874 link_unref(set_remove(master
->slaves
, link
));
877 static void link_drop_requests(Link
*link
) {
881 assert(link
->manager
);
883 ORDERED_SET_FOREACH(req
, link
->manager
->request_queue
)
884 if (req
->link
== link
)
885 request_detach(link
->manager
, req
);
888 static Link
*link_drop(Link
*link
) {
892 assert(link
->manager
);
894 link_set_state(link
, LINK_STATE_LINGER
);
896 /* Drop all references from other links and manager. Note that async netlink calls may have
897 * references to the link, and they will be dropped when we receive replies. */
899 link_drop_requests(link
);
901 link_free_bound_to_list(link
);
902 link_free_bound_by_list(link
);
904 link_clear_sr_iov_ifindices(link
);
906 link_drop_from_master(link
);
908 if (link
->state_file
)
909 (void) unlink(link
->state_file
);
913 STRV_FOREACH(n
, link
->alternative_names
)
914 hashmap_remove(link
->manager
->links_by_name
, *n
);
915 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
917 /* bonding master and its slaves have the same hardware address. */
918 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
920 /* The following must be called at last. */
921 assert_se(hashmap_remove(link
->manager
->links_by_index
, INT_TO_PTR(link
->ifindex
)) == link
);
922 return link_unref(link
);
925 static int link_drop_foreign_config(Link
*link
) {
929 assert(link
->manager
);
931 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
932 * to remove loopback address or addresses used for root NFS. */
934 if (IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
936 if (FLAGS_SET(link
->flags
, IFF_LOOPBACK
))
938 if (link
->network
->keep_configuration
== KEEP_CONFIGURATION_YES
)
941 r
= link_drop_foreign_routes(link
);
943 k
= link_drop_foreign_nexthops(link
);
947 k
= link_drop_foreign_addresses(link
);
951 k
= link_drop_foreign_neighbors(link
);
955 k
= manager_drop_foreign_routing_policy_rules(link
->manager
);
962 static int link_drop_managed_config(Link
*link
) {
966 assert(link
->manager
);
968 r
= link_drop_managed_routes(link
);
970 k
= link_drop_managed_nexthops(link
);
974 k
= link_drop_managed_addresses(link
);
978 k
= link_drop_managed_neighbors(link
);
982 k
= link_drop_managed_routing_policy_rules(link
);
989 static void link_foreignize_config(Link
*link
) {
991 assert(link
->manager
);
993 link_foreignize_routes(link
);
994 link_foreignize_nexthops(link
);
995 link_foreignize_addresses(link
);
996 link_foreignize_neighbors(link
);
997 link_foreignize_routing_policy_rules(link
);
1000 static int link_configure(Link
*link
) {
1004 assert(link
->network
);
1005 assert(link
->state
== LINK_STATE_INITIALIZED
);
1007 link_set_state(link
, LINK_STATE_CONFIGURING
);
1009 r
= link_new_bound_to_list(link
);
1013 r
= link_request_traffic_control(link
);
1017 if (link
->iftype
== ARPHRD_CAN
) {
1018 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1019 r
= link_request_to_set_can(link
);
1023 return link_request_to_activate(link
);
1026 r
= link_request_sr_iov_vfs(link
);
1030 r
= link_set_sysctl(link
);
1034 r
= link_request_to_set_mac(link
, /* allow_retry = */ true);
1038 r
= link_request_to_set_ipoib(link
);
1042 r
= link_request_to_set_flags(link
);
1046 r
= link_request_to_set_group(link
);
1050 r
= link_configure_mtu(link
);
1054 r
= link_request_to_set_addrgen_mode(link
);
1058 r
= link_request_to_set_master(link
);
1062 r
= link_request_stacked_netdevs(link
);
1066 r
= link_request_to_set_bond(link
);
1070 r
= link_request_to_set_bridge(link
);
1074 r
= link_request_to_set_bridge_vlan(link
);
1078 r
= link_request_to_activate(link
);
1082 r
= ipv4ll_configure(link
);
1086 r
= link_request_dhcp4_client(link
);
1090 r
= link_request_dhcp6_client(link
);
1094 r
= link_request_ndisc(link
);
1098 r
= link_request_dhcp_server(link
);
1102 r
= link_request_radv(link
);
1106 r
= link_lldp_rx_configure(link
);
1110 r
= link_lldp_tx_configure(link
);
1114 r
= link_drop_foreign_config(link
);
1118 r
= link_request_static_configs(link
);
1122 if (!link_has_carrier(link
))
1125 return link_acquire_dynamic_conf(link
);
1128 static int link_get_network(Link
*link
, Network
**ret
) {
1133 assert(link
->manager
);
1136 ORDERED_HASHMAP_FOREACH(network
, link
->manager
->networks
) {
1139 r
= net_match_config(
1143 &link
->permanent_hw_addr
,
1148 link
->alternative_names
,
1157 if (network
->match
.ifname
&& link
->dev
) {
1158 uint8_t name_assign_type
= NET_NAME_UNKNOWN
;
1161 if (sd_device_get_sysattr_value(link
->dev
, "name_assign_type", &attr
) >= 0)
1162 (void) safe_atou8(attr
, &name_assign_type
);
1164 warn
= name_assign_type
== NET_NAME_ENUM
;
1167 log_link_full(link
, warn
? LOG_WARNING
: LOG_DEBUG
,
1168 "found matching network '%s'%s.",
1170 warn
? ", based on potentially unpredictable interface name" : "");
1172 if (network
->unmanaged
)
1182 int link_reconfigure_impl(Link
*link
, bool force
) {
1183 Network
*network
= NULL
;
1184 NetDev
*netdev
= NULL
;
1189 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
1192 r
= netdev_get(link
->manager
, link
->ifname
, &netdev
);
1193 if (r
< 0 && r
!= -ENOENT
)
1196 r
= link_get_network(link
, &network
);
1197 if (r
< 0 && r
!= -ENOENT
)
1200 if (link
->state
!= LINK_STATE_UNMANAGED
&& !network
)
1201 /* If link is in initialized state, then link->network is also NULL. */
1204 if (link
->network
== network
&& !force
)
1208 if (link
->state
== LINK_STATE_INITIALIZED
)
1209 log_link_info(link
, "Configuring with %s.", network
->filename
);
1211 log_link_info(link
, "Reconfiguring with %s.", network
->filename
);
1213 log_link_full(link
, link
->state
== LINK_STATE_INITIALIZED
? LOG_DEBUG
: LOG_INFO
,
1214 "Unmanaging interface.");
1216 /* Dropping old .network file */
1217 r
= link_stop_engines(link
, false);
1221 link_drop_requests(link
);
1223 if (network
&& !force
&& network
->keep_configuration
!= KEEP_CONFIGURATION_YES
)
1224 /* When a new/updated .network file is assigned, first make all configs (addresses,
1225 * routes, and so on) foreign, and then drop unnecessary configs later by
1226 * link_drop_foreign_config() in link_configure().
1227 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1228 * here we need to drop the configs such as addresses, routes, and so on configured by
1229 * the previously assigned .network file. */
1230 link_foreignize_config(link
);
1232 /* Remove all managed configs. Note, foreign configs are removed in later by
1233 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1234 r
= link_drop_managed_config(link
);
1239 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1240 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1241 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1242 * map here, as it depends on .network files assigned to other links. */
1243 link_free_bound_to_list(link
);
1245 link_free_engines(link
);
1246 link
->network
= network_unref(link
->network
);
1248 netdev_unref(link
->netdev
);
1249 link
->netdev
= netdev_ref(netdev
);
1252 link_set_state(link
, LINK_STATE_UNMANAGED
);
1256 /* Then, apply new .network file */
1257 link
->network
= network_ref(network
);
1258 link_update_operstate(link
, true);
1261 link_set_state(link
, LINK_STATE_INITIALIZED
);
1262 link
->activated
= false;
1264 r
= link_configure(link
);
1271 static int link_reconfigure_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, bool force
) {
1276 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to update link state");
1280 r
= link_reconfigure_impl(link
, force
);
1282 link_enter_failed(link
);
1289 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1290 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ false);
1293 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1294 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ true);
1297 int link_reconfigure(Link
*link
, bool force
) {
1302 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1303 * the function from being called multiple times simultaneously, refuse to reconfigure the
1304 * interface in these cases. */
1305 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
, LINK_STATE_LINGER
))
1306 return 0; /* 0 means no-op. */
1308 r
= link_call_getlink(link
, force
? link_force_reconfigure_handler
: link_reconfigure_handler
);
1312 return 1; /* 1 means the interface will be reconfigured. */
1315 static int link_initialized_and_synced(Link
*link
) {
1319 assert(link
->manager
);
1321 if (link
->manager
->test_mode
) {
1322 log_link_debug(link
, "Running in test mode, refusing to enter initialized state.");
1323 link_set_state(link
, LINK_STATE_UNMANAGED
);
1327 if (link
->state
== LINK_STATE_PENDING
) {
1328 log_link_debug(link
, "Link state is up-to-date");
1329 link_set_state(link
, LINK_STATE_INITIALIZED
);
1331 r
= link_new_bound_by_list(link
);
1335 r
= link_handle_bound_by_list(link
);
1340 return link_reconfigure_impl(link
, /* force = */ false);
1343 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1346 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to wait for the interface to be initialized");
1350 r
= link_initialized_and_synced(link
);
1352 link_enter_failed(link
);
1357 static int link_initialized(Link
*link
, sd_device
*device
) {
1363 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1364 * or sysattrs) may be outdated. */
1365 device_unref_and_replace(link
->dev
, device
);
1367 if (link
->dhcp_client
) {
1368 r
= sd_dhcp_client_attach_device(link
->dhcp_client
, link
->dev
);
1370 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv4 client, ignoring: %m");
1373 if (link
->dhcp6_client
) {
1374 r
= sd_dhcp6_client_attach_device(link
->dhcp6_client
, link
->dev
);
1376 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv6 client, ignoring: %m");
1379 r
= link_set_sr_iov_ifindices(link
);
1381 log_link_warning_errno(link
, r
, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1383 if (link
->state
!= LINK_STATE_PENDING
)
1384 return link_reconfigure(link
, /* force = */ false);
1386 log_link_debug(link
, "udev initialized link");
1388 /* udev has initialized the link, but we don't know if we have yet
1389 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1390 * when it returns we know that the pending NEWLINKs have already been
1391 * processed and that we are up-to-date */
1393 return link_call_getlink(link
, link_initialized_handler
);
1396 static int link_check_initialized(Link
*link
) {
1397 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
1402 if (!udev_available())
1403 return link_initialized_and_synced(link
);
1405 /* udev should be around */
1406 r
= sd_device_new_from_ifindex(&device
, link
->ifindex
);
1408 log_link_debug_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
1412 r
= sd_device_get_is_initialized(device
);
1414 return log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
1417 log_link_debug(link
, "link pending udev initialization...");
1421 r
= device_is_renaming(device
);
1423 return log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
1425 log_link_debug(link
, "Interface is being renamed, pending initialization.");
1429 return link_initialized(link
, device
);
1432 int manager_udev_process_link(Manager
*m
, sd_device
*device
, sd_device_action_t action
) {
1439 r
= sd_device_get_ifindex(device
, &ifindex
);
1441 return log_device_debug_errno(device
, r
, "Failed to get ifindex: %m");
1443 r
= link_get_by_index(m
, ifindex
, &link
);
1445 /* This error is not critical, as the corresponding rtnl message may be received later. */
1446 log_device_debug_errno(device
, r
, "Failed to get link from ifindex %i, ignoring: %m", ifindex
);
1450 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1451 * object here. It will be removed only when rtnetlink says so. */
1452 if (action
== SD_DEVICE_REMOVE
) {
1453 link
->dev
= sd_device_unref(link
->dev
);
1457 r
= device_is_renaming(device
);
1459 return log_device_debug_errno(device
, r
, "Failed to determine if the device is renaming or not: %m");
1461 log_device_debug(device
, "Device is renaming, waiting for the interface to be renamed.");
1463 * What happens when a device is initialized, then soon renamed after that? When we detect
1464 * such, maybe we should cancel or postpone all queued requests for the interface. */
1468 r
= link_initialized(link
, device
);
1470 link_enter_failed(link
);
1475 static int link_carrier_gained(Link
*link
) {
1476 bool force_reconfigure
;
1481 r
= event_source_disable(link
->carrier_lost_timer
);
1483 log_link_warning_errno(link
, r
, "Failed to disable carrier lost timer, ignoring: %m");
1485 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1486 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1487 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1488 * restarted, and the correct network information will be gained.
1490 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1491 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1492 * already assigned to the interface (in that case, the .network file does not have the SSID=
1493 * setting in the [Match] section), and the interface is already being configured. Of course,
1494 * there may exist another .network file with higher priority and a matching SSID= setting. But
1495 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1497 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1498 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1499 force_reconfigure
= link
->previous_ssid
&& !streq_ptr(link
->previous_ssid
, link
->ssid
);
1500 link
->previous_ssid
= mfree(link
->previous_ssid
);
1502 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1503 * profile wants to match on it with SSID= in its [Match] section.
1505 if (IN_SET(link
->wlan_iftype
, NL80211_IFTYPE_AP
, NL80211_IFTYPE_P2P_GO
)) {
1506 r
= link_get_wlan_interface(link
);
1511 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1512 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1513 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1514 r
= link_reconfigure_impl(link
, force_reconfigure
);
1518 r
= link_handle_bound_by_list(link
);
1522 if (link
->iftype
== ARPHRD_CAN
)
1523 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1526 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
1527 r
= link_acquire_dynamic_conf(link
);
1531 r
= link_request_static_configs(link
);
1539 static int link_carrier_lost_impl(Link
*link
) {
1544 link
->previous_ssid
= mfree(link
->previous_ssid
);
1546 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1552 r
= link_stop_engines(link
, false);
1556 r
= link_drop_managed_config(link
);
1557 if (r
< 0 && ret
>= 0)
1563 static int link_carrier_lost_handler(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
1564 Link
*link
= ASSERT_PTR(userdata
);
1567 r
= link_carrier_lost_impl(link
);
1569 log_link_warning_errno(link
, r
, "Failed to process carrier lost event: %m");
1570 link_enter_failed(link
);
1576 static int link_carrier_lost(Link
*link
) {
1583 r
= link_handle_bound_by_list(link
);
1587 if (link
->iftype
== ARPHRD_CAN
)
1588 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1594 if (link
->network
->ignore_carrier_loss_set
)
1595 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1596 usec
= link
->network
->ignore_carrier_loss_usec
;
1598 else if (link
->network
->bond
&& link
->wlan_iftype
> 0)
1599 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1600 * carrier to be lost. See #19832. */
1601 usec
= 3 * USEC_PER_SEC
;
1603 else if (link
->network
->dhcp_use_mtu
&&
1605 sd_dhcp_lease_get_mtu(link
->dhcp_lease
, &dhcp_mtu
) >= 0 &&
1606 dhcp_mtu
!= link
->original_mtu
)
1607 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1608 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1609 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1610 usec
= 5 * USEC_PER_SEC
;
1613 /* Otherwise, use the currently set value. */
1614 usec
= link
->network
->ignore_carrier_loss_usec
;
1616 if (usec
== USEC_INFINITY
)
1620 return link_carrier_lost_impl(link
);
1622 return event_reset_time_relative(link
->manager
->event
,
1623 &link
->carrier_lost_timer
,
1627 link_carrier_lost_handler
,
1630 "link-carrier-loss",
1634 static int link_admin_state_up(Link
*link
) {
1639 /* This is called every time an interface admin state changes to up;
1640 * specifically, when IFF_UP flag changes from unset to set. */
1645 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_DOWN
) {
1646 log_link_info(link
, "Activation policy is \"always-down\", forcing link down.");
1647 return link_request_to_bring_up_or_down(link
, /* up = */ false);
1650 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1651 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1652 r
= link_set_ipv6_mtu(link
);
1654 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU, ignoring: %m");
1659 static int link_admin_state_down(Link
*link
) {
1665 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_UP
) {
1666 log_link_info(link
, "Activation policy is \"always-up\", forcing link up.");
1667 return link_request_to_bring_up_or_down(link
, /* up = */ true);
1673 static bool link_is_enslaved(Link
*link
) {
1674 if (link
->flags
& IFF_SLAVE
)
1677 if (link
->master_ifindex
> 0)
1683 static LinkAddressState
address_state_from_scope(uint8_t scope
) {
1684 if (scope
< RT_SCOPE_SITE
)
1685 /* universally accessible addresses found */
1686 return LINK_ADDRESS_STATE_ROUTABLE
;
1688 if (scope
< RT_SCOPE_HOST
)
1689 /* only link or site local addresses found */
1690 return LINK_ADDRESS_STATE_DEGRADED
;
1692 /* no useful addresses found */
1693 return LINK_ADDRESS_STATE_OFF
;
1696 void link_update_operstate(Link
*link
, bool also_update_master
) {
1697 LinkOperationalState operstate
;
1698 LinkCarrierState carrier_state
;
1699 LinkAddressState ipv4_address_state
, ipv6_address_state
, address_state
;
1700 LinkOnlineState online_state
;
1701 _cleanup_strv_free_
char **p
= NULL
;
1702 uint8_t ipv4_scope
= RT_SCOPE_NOWHERE
, ipv6_scope
= RT_SCOPE_NOWHERE
;
1703 bool changed
= false;
1708 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
1709 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
1710 else if (link_has_carrier(link
)) {
1711 if (link_is_enslaved(link
))
1712 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
1714 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
1715 } else if (link
->flags
& IFF_UP
)
1716 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
1718 carrier_state
= LINK_CARRIER_STATE_OFF
;
1720 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
1723 SET_FOREACH(slave
, link
->slaves
) {
1724 link_update_operstate(slave
, false);
1726 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
1727 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
1731 SET_FOREACH(address
, link
->addresses
) {
1732 if (!address_is_ready(address
))
1735 if (address
->family
== AF_INET
)
1736 ipv4_scope
= MIN(ipv4_scope
, address
->scope
);
1738 if (address
->family
== AF_INET6
)
1739 ipv6_scope
= MIN(ipv6_scope
, address
->scope
);
1742 ipv4_address_state
= address_state_from_scope(ipv4_scope
);
1743 ipv6_address_state
= address_state_from_scope(ipv6_scope
);
1744 address_state
= address_state_from_scope(MIN(ipv4_scope
, ipv6_scope
));
1746 /* Mapping of address and carrier state vs operational state
1748 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1749 * ------------------------------------------------------------------------------
1750 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1751 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1752 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1755 if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
1756 operstate
= (LinkOperationalState
) carrier_state
;
1757 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1758 operstate
= LINK_OPERSTATE_ROUTABLE
;
1759 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
1760 operstate
= LINK_OPERSTATE_DEGRADED
;
1762 operstate
= LINK_OPERSTATE_ENSLAVED
;
1764 /* Only determine online state for managed links with RequiredForOnline=yes */
1765 if (!link
->network
|| !link
->network
->required_for_online
)
1766 online_state
= _LINK_ONLINE_STATE_INVALID
;
1767 else if (operstate
< link
->network
->required_operstate_for_online
.min
||
1768 operstate
> link
->network
->required_operstate_for_online
.max
)
1769 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1771 AddressFamily required_family
= link
->network
->required_family_for_online
;
1772 bool needs_ipv4
= required_family
& ADDRESS_FAMILY_IPV4
;
1773 bool needs_ipv6
= required_family
& ADDRESS_FAMILY_IPV6
;
1775 /* The operational state is within the range required for online.
1776 * If a particular address family is also required, we might revert
1777 * to offline in the blocks below. */
1778 online_state
= LINK_ONLINE_STATE_ONLINE
;
1780 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_DEGRADED
) {
1781 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1782 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1783 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1784 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1787 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_ROUTABLE
) {
1788 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1789 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1790 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1791 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1795 if (link
->carrier_state
!= carrier_state
) {
1796 link
->carrier_state
= carrier_state
;
1798 if (strv_extend(&p
, "CarrierState") < 0)
1802 if (link
->address_state
!= address_state
) {
1803 link
->address_state
= address_state
;
1805 if (strv_extend(&p
, "AddressState") < 0)
1809 if (link
->ipv4_address_state
!= ipv4_address_state
) {
1810 link
->ipv4_address_state
= ipv4_address_state
;
1812 if (strv_extend(&p
, "IPv4AddressState") < 0)
1816 if (link
->ipv6_address_state
!= ipv6_address_state
) {
1817 link
->ipv6_address_state
= ipv6_address_state
;
1819 if (strv_extend(&p
, "IPv6AddressState") < 0)
1823 if (link
->operstate
!= operstate
) {
1824 link
->operstate
= operstate
;
1826 if (strv_extend(&p
, "OperationalState") < 0)
1830 if (link
->online_state
!= online_state
) {
1831 link
->online_state
= online_state
;
1833 if (strv_extend(&p
, "OnlineState") < 0)
1838 link_send_changed_strv(link
, p
);
1842 if (also_update_master
) {
1845 if (link_get_master(link
, &master
) >= 0)
1846 link_update_operstate(master
, true);
1850 #define FLAG_STRING(string, flag, old, new) \
1851 (((old ^ new) & flag) \
1852 ? ((old & flag) ? (" -" string) : (" +" string)) \
1855 static int link_update_flags(Link
*link
, sd_netlink_message
*message
) {
1856 bool link_was_admin_up
, had_carrier
;
1864 r
= sd_rtnl_message_link_get_flags(message
, &flags
);
1866 return log_link_debug_errno(link
, r
, "rtnl: failed to read link flags: %m");
1868 r
= sd_netlink_message_read_u8(message
, IFLA_OPERSTATE
, &operstate
);
1870 /* If we got a message without operstate, assume the state was unchanged. */
1871 operstate
= link
->kernel_operstate
;
1873 return log_link_debug_errno(link
, r
, "rtnl: failed to read operational state: %m");
1875 if (link
->flags
== flags
&& link
->kernel_operstate
== operstate
)
1878 if (link
->flags
!= flags
) {
1879 unsigned unknown_flags
, unknown_flags_added
, unknown_flags_removed
;
1881 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",
1882 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
1883 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
1884 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
1885 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
1886 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
1887 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
1888 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
1889 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
1890 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
1891 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
1892 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
1893 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
1894 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
1895 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
1896 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
1897 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
1898 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
1899 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
1900 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
1902 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
1903 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
1904 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
1905 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
1906 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
1907 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
1908 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
1909 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
1911 if (unknown_flags_added
)
1912 log_link_debug(link
, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added
);
1914 if (unknown_flags_removed
)
1915 log_link_debug(link
, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed
);
1918 link_was_admin_up
= link
->flags
& IFF_UP
;
1919 had_carrier
= link_has_carrier(link
);
1921 link
->flags
= flags
;
1922 link
->kernel_operstate
= operstate
;
1924 link_update_operstate(link
, true);
1926 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
1927 log_link_info(link
, "Link UP");
1929 r
= link_admin_state_up(link
);
1932 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
)) {
1933 log_link_info(link
, "Link DOWN");
1935 r
= link_admin_state_down(link
);
1940 if (!had_carrier
&& link_has_carrier(link
)) {
1941 log_link_info(link
, "Gained carrier");
1943 r
= link_carrier_gained(link
);
1946 } else if (had_carrier
&& !link_has_carrier(link
)) {
1947 log_link_info(link
, "Lost carrier");
1949 r
= link_carrier_lost(link
);
1957 static int link_update_master(Link
*link
, sd_netlink_message
*message
) {
1958 int master_ifindex
, r
;
1963 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t*) &master_ifindex
);
1967 return log_link_debug_errno(link
, r
, "rtnl: failed to read master ifindex: %m");
1969 if (master_ifindex
== link
->ifindex
)
1972 if (master_ifindex
== link
->master_ifindex
)
1975 if (link
->master_ifindex
== 0)
1976 log_link_debug(link
, "Attached to master interface: %i", master_ifindex
);
1977 else if (master_ifindex
== 0)
1978 log_link_debug(link
, "Detached from master interface: %i", link
->master_ifindex
);
1980 log_link_debug(link
, "Master interface changed: %i %s %i", link
->master_ifindex
,
1981 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), master_ifindex
);
1983 link_drop_from_master(link
);
1985 link
->master_ifindex
= master_ifindex
;
1987 r
= link_append_to_master(link
);
1989 return log_link_debug_errno(link
, r
, "Failed to append link to master: %m");
1994 static int link_update_driver(Link
*link
, sd_netlink_message
*message
) {
1998 assert(link
->manager
);
2001 /* Driver is already read. Assuming the driver is never changed. */
2002 if (link
->ethtool_driver_read
)
2005 /* When udevd is running, read the driver after the interface is initialized by udevd.
2006 * Otherwise, ethtool may not work correctly. See issue #22538.
2007 * When udevd is not running, read the value when the interface is detected. */
2008 if (udev_available() && !link
->dev
)
2011 link
->ethtool_driver_read
= true;
2013 r
= ethtool_get_driver(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
2015 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
2019 log_link_debug(link
, "Found driver: %s", strna(link
->driver
));
2021 if (streq_ptr(link
->driver
, "dsa")) {
2022 uint32_t dsa_master_ifindex
= 0;
2024 r
= sd_netlink_message_read_u32(message
, IFLA_LINK
, &dsa_master_ifindex
);
2025 if (r
< 0 && r
!= -ENODATA
)
2026 return log_link_debug_errno(link
, r
, "rtnl: failed to read ifindex of the DSA master interface: %m");
2028 if (dsa_master_ifindex
> INT_MAX
) {
2029 log_link_debug(link
, "rtnl: received too large DSA master ifindex (%"PRIu32
" > INT_MAX), ignoring.",
2030 dsa_master_ifindex
);
2031 dsa_master_ifindex
= 0;
2034 link
->dsa_master_ifindex
= (int) dsa_master_ifindex
;
2037 return 1; /* needs reconfigure */
2040 static int link_update_permanent_hardware_address_from_ethtool(Link
*link
, sd_netlink_message
*message
) {
2044 assert(link
->manager
);
2047 if (link
->ethtool_permanent_hw_addr_read
)
2050 /* When udevd is running, read the permanent hardware address after the interface is
2051 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2052 * When udevd is not running, read the value when the interface is detected. */
2053 if (udev_available() && !link
->dev
)
2056 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2057 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, NULL
);
2061 return log_link_debug_errno(link
, r
, "Failed to read IFLA_ADDRESS attribute: %m");
2063 link
->ethtool_permanent_hw_addr_read
= true;
2065 r
= ethtool_get_permanent_hw_addr(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->permanent_hw_addr
);
2067 log_link_debug_errno(link
, r
, "Permanent hardware address not found, continuing without: %m");
2072 static int link_update_permanent_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2076 assert(link
->manager
);
2079 if (link
->permanent_hw_addr
.length
> 0)
2082 r
= netlink_message_read_hw_addr(message
, IFLA_PERM_ADDRESS
, &link
->permanent_hw_addr
);
2085 return log_link_debug_errno(link
, r
, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2087 /* Fallback to ethtool for older kernels. */
2088 r
= link_update_permanent_hardware_address_from_ethtool(link
, message
);
2093 if (link
->permanent_hw_addr
.length
> 0)
2094 log_link_debug(link
, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link
->permanent_hw_addr
));
2096 return 1; /* needs reconfigure */
2099 static int link_update_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2100 struct hw_addr_data addr
;
2106 r
= netlink_message_read_hw_addr(message
, IFLA_BROADCAST
, &link
->bcast_addr
);
2107 if (r
< 0 && r
!= -ENODATA
)
2108 return log_link_debug_errno(link
, r
, "rtnl: failed to read broadcast address: %m");
2110 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, &addr
);
2114 return log_link_debug_errno(link
, r
, "rtnl: failed to read hardware address: %m");
2116 if (hw_addr_equal(&link
->hw_addr
, &addr
))
2119 if (link
->hw_addr
.length
== 0)
2120 log_link_debug(link
, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr
));
2122 log_link_debug(link
, "Hardware address is changed: %s %s %s",
2123 HW_ADDR_TO_STR(&link
->hw_addr
),
2124 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
),
2125 HW_ADDR_TO_STR(&addr
));
2127 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2130 link
->hw_addr
= addr
;
2132 if (!hw_addr_is_null(&link
->hw_addr
)) {
2133 r
= hashmap_ensure_put(&link
->manager
->links_by_hw_addr
, &hw_addr_hash_ops
, &link
->hw_addr
, link
);
2134 if (r
== -EEXIST
&& streq_ptr(link
->kind
, "bond"))
2135 /* bonding master and its slaves have the same hardware address. */
2136 r
= hashmap_replace(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2138 log_link_debug_errno(link
, r
, "Failed to manage link by its new hardware address, ignoring: %m");
2141 r
= ipv4acd_update_mac(link
);
2143 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4 ACD client: %m");
2145 r
= ipv4ll_update_mac(link
);
2147 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2149 r
= dhcp4_update_mac(link
);
2151 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2153 r
= dhcp6_update_mac(link
);
2155 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2157 r
= radv_update_mac(link
);
2159 return log_link_debug_errno(link
, r
, "Could not update MAC address for Router Advertisement: %m");
2161 if (link
->ndisc
&& link
->hw_addr
.length
== ETH_ALEN
) {
2162 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->hw_addr
.ether
);
2164 return log_link_debug_errno(link
, r
, "Could not update MAC for NDisc: %m");
2167 if (link
->lldp_rx
) {
2168 r
= sd_lldp_rx_set_filter_address(link
->lldp_rx
, &link
->hw_addr
.ether
);
2170 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Rx: %m");
2173 if (link
->lldp_tx
) {
2174 r
= sd_lldp_tx_set_hwaddr(link
->lldp_tx
, &link
->hw_addr
.ether
);
2176 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Tx: %m");
2179 return 1; /* needs reconfigure */
2182 static int link_update_mtu(Link
*link
, sd_netlink_message
*message
) {
2183 uint32_t mtu
, min_mtu
= 0, max_mtu
= UINT32_MAX
;
2189 r
= sd_netlink_message_read_u32(message
, IFLA_MTU
, &mtu
);
2193 return log_link_debug_errno(link
, r
, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2197 r
= sd_netlink_message_read_u32(message
, IFLA_MIN_MTU
, &min_mtu
);
2198 if (r
< 0 && r
!= -ENODATA
)
2199 return log_link_debug_errno(link
, r
, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2201 r
= sd_netlink_message_read_u32(message
, IFLA_MAX_MTU
, &max_mtu
);
2202 if (r
< 0 && r
!= -ENODATA
)
2203 return log_link_debug_errno(link
, r
, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2206 max_mtu
= UINT32_MAX
;
2208 link
->min_mtu
= min_mtu
;
2209 link
->max_mtu
= max_mtu
;
2211 if (link
->original_mtu
== 0) {
2212 link
->original_mtu
= mtu
;
2213 log_link_debug(link
, "Saved original MTU %" PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2214 link
->original_mtu
, link
->min_mtu
, link
->max_mtu
);
2217 if (link
->mtu
== mtu
)
2221 log_link_debug(link
, "MTU is changed: %"PRIu32
" %s %"PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2222 link
->mtu
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), mtu
,
2223 link
->min_mtu
, link
->max_mtu
);
2227 if (link
->dhcp_client
) {
2228 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
, link
->mtu
);
2230 return log_link_debug_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2234 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
2236 return log_link_debug_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
2242 static int link_update_alternative_names(Link
*link
, sd_netlink_message
*message
) {
2243 _cleanup_strv_free_
char **altnames
= NULL
;
2249 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &altnames
);
2251 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2252 * interface has no alternative name. */
2255 return log_link_debug_errno(link
, r
, "rtnl: failed to read alternative names: %m");
2257 if (strv_equal(altnames
, link
->alternative_names
))
2260 STRV_FOREACH(n
, link
->alternative_names
)
2261 hashmap_remove(link
->manager
->links_by_name
, *n
);
2263 strv_free_and_replace(link
->alternative_names
, altnames
);
2265 STRV_FOREACH(n
, link
->alternative_names
) {
2266 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, *n
, link
);
2268 return log_link_debug_errno(link
, r
, "Failed to manage link by its new alternative names: %m");
2271 return 1; /* needs reconfigure */
2274 static int link_update_name(Link
*link
, sd_netlink_message
*message
) {
2275 char ifname_from_index
[IF_NAMESIZE
];
2282 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
2287 return log_link_debug_errno(link
, r
, "Failed to read interface name in RTM_NEWLINK message: %m");
2289 if (streq(ifname
, link
->ifname
))
2292 r
= format_ifname(link
->ifindex
, ifname_from_index
);
2294 return log_link_debug_errno(link
, r
, "Could not get interface name for index %i.", link
->ifindex
);
2296 if (!streq(ifname
, ifname_from_index
)) {
2297 log_link_debug(link
, "New interface name '%s' received from the kernel does not correspond "
2298 "with the name currently configured on the actual interface '%s'. Ignoring.",
2299 ifname
, ifname_from_index
);
2303 log_link_info(link
, "Interface name change detected, renamed to %s.", ifname
);
2305 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
2307 r
= free_and_strdup(&link
->ifname
, ifname
);
2309 return log_oom_debug();
2311 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2313 return log_link_debug_errno(link
, r
, "Failed to manage link by its new name: %m");
2315 if (link
->dhcp_client
) {
2316 r
= sd_dhcp_client_set_ifname(link
->dhcp_client
, link
->ifname
);
2318 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP client: %m");
2321 if (link
->dhcp6_client
) {
2322 r
= sd_dhcp6_client_set_ifname(link
->dhcp6_client
, link
->ifname
);
2324 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP6 client: %m");
2328 r
= sd_ndisc_set_ifname(link
->ndisc
, link
->ifname
);
2330 return log_link_debug_errno(link
, r
, "Failed to update interface name in NDisc: %m");
2333 if (link
->dhcp_server
) {
2334 r
= sd_dhcp_server_set_ifname(link
->dhcp_server
, link
->ifname
);
2336 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP server: %m");
2340 r
= sd_radv_set_ifname(link
->radv
, link
->ifname
);
2342 return log_link_debug_errno(link
, r
, "Failed to update interface name in Router Advertisement: %m");
2345 if (link
->lldp_rx
) {
2346 r
= sd_lldp_rx_set_ifname(link
->lldp_rx
, link
->ifname
);
2348 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Rx: %m");
2351 if (link
->lldp_tx
) {
2352 r
= sd_lldp_tx_set_ifname(link
->lldp_tx
, link
->ifname
);
2354 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Tx: %m");
2358 r
= sd_ipv4ll_set_ifname(link
->ipv4ll
, link
->ifname
);
2360 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4LL client: %m");
2363 r
= ipv4acd_set_ifname(link
);
2365 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4ACD client: %m");
2367 return 1; /* needs reconfigure */
2370 static int link_update(Link
*link
, sd_netlink_message
*message
) {
2371 bool needs_reconfigure
= false;
2377 r
= link_update_name(link
, message
);
2380 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2382 r
= link_update_alternative_names(link
, message
);
2385 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2387 r
= link_update_mtu(link
, message
);
2391 r
= link_update_driver(link
, message
);
2394 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2396 r
= link_update_permanent_hardware_address(link
, message
);
2399 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2401 r
= link_update_hardware_address(link
, message
);
2404 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2406 r
= link_update_master(link
, message
);
2410 r
= link_update_ipv6ll_addrgen_mode(link
, message
);
2414 r
= link_update_flags(link
, message
);
2418 return needs_reconfigure
;
2421 static Link
*link_drop_or_unref(Link
*link
) {
2425 return link_unref(link
);
2426 return link_drop(link
);
2429 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_drop_or_unref
);
2431 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
2432 _cleanup_free_
char *ifname
= NULL
, *kind
= NULL
, *state_file
= NULL
, *lease_file
= NULL
, *lldp_file
= NULL
;
2433 _cleanup_(link_drop_or_unrefp
) Link
*link
= NULL
;
2434 unsigned short iftype
;
2441 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2443 return log_debug_errno(r
, "rtnl: failed to read ifindex from link message: %m");
2444 else if (ifindex
<= 0)
2445 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "rtnl: received link message without valid ifindex.");
2447 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
2449 return log_debug_errno(r
, "rtnl: failed to read interface type from link message: %m");
2451 r
= sd_netlink_message_read_string_strdup(message
, IFLA_IFNAME
, &ifname
);
2453 return log_debug_errno(r
, "rtnl: failed to read interface name from link message: %m");
2455 /* check for link kind */
2456 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
2458 r
= sd_netlink_message_read_string_strdup(message
, IFLA_INFO_KIND
, &kind
);
2459 if (r
< 0 && r
!= -ENODATA
)
2460 return log_debug_errno(r
, "rtnl: failed to read interface kind from link message: %m");
2461 r
= sd_netlink_message_exit_container(message
);
2463 return log_debug_errno(r
, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2466 if (!manager
->test_mode
) {
2467 /* Do not update state files when running in test mode. */
2468 if (asprintf(&state_file
, "/run/systemd/netif/links/%d", ifindex
) < 0)
2469 return log_oom_debug();
2471 if (asprintf(&lease_file
, "/run/systemd/netif/leases/%d", ifindex
) < 0)
2472 return log_oom_debug();
2474 if (asprintf(&lldp_file
, "/run/systemd/netif/lldp/%d", ifindex
) < 0)
2475 return log_oom_debug();
2478 link
= new(Link
, 1);
2484 .state
= LINK_STATE_PENDING
,
2485 .online_state
= _LINK_ONLINE_STATE_INVALID
,
2488 .ifname
= TAKE_PTR(ifname
),
2489 .kind
= TAKE_PTR(kind
),
2491 .ipv6ll_address_gen_mode
= _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID
,
2493 .state_file
= TAKE_PTR(state_file
),
2494 .lease_file
= TAKE_PTR(lease_file
),
2495 .lldp_file
= TAKE_PTR(lldp_file
),
2498 .dns_default_route
= -1,
2499 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
2500 .mdns
= _RESOLVE_SUPPORT_INVALID
,
2501 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
2502 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
2505 r
= hashmap_ensure_put(&manager
->links_by_index
, NULL
, INT_TO_PTR(link
->ifindex
), link
);
2507 return log_link_debug_errno(link
, r
, "Failed to store link into manager: %m");
2509 link
->manager
= manager
;
2511 r
= hashmap_ensure_put(&manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2513 return log_link_debug_errno(link
, r
, "Failed to manage link by its interface name: %m");
2515 log_link_debug(link
, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2516 link
->ifindex
, strna(arphrd_to_name(link
->iftype
)), link
->iftype
, strna(link
->kind
));
2518 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2519 * message arrived too early. Request the wireless link information again.
2521 if (set_remove(manager
->new_wlan_ifindices
, INT_TO_PTR(link
->ifindex
))) {
2522 r
= link_get_wlan_interface(link
);
2524 log_link_warning_errno(link
, r
, "Failed to get wireless interface, ignoring: %m");
2527 *ret
= TAKE_PTR(link
);
2531 int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, Manager
*manager
) {
2533 NetDev
*netdev
= NULL
;
2542 if (sd_netlink_message_is_error(message
)) {
2543 r
= sd_netlink_message_get_errno(message
);
2545 log_message_warning_errno(message
, r
, "rtnl: Could not receive link message, ignoring");
2550 r
= sd_netlink_message_get_type(message
, &type
);
2552 log_warning_errno(r
, "rtnl: Could not get message type, ignoring: %m");
2554 } else if (!IN_SET(type
, RTM_NEWLINK
, RTM_DELLINK
)) {
2555 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type
);
2559 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2561 log_warning_errno(r
, "rtnl: Could not get ifindex from link message, ignoring: %m");
2563 } else if (ifindex
<= 0) {
2564 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex
);
2568 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
2570 log_warning_errno(r
, "rtnl: Received link message without ifname, ignoring: %m");
2574 (void) link_get_by_index(manager
, ifindex
, &link
);
2575 (void) netdev_get(manager
, name
, &netdev
);
2580 /* netdev exists, so make sure the ifindex matches */
2581 r
= netdev_set_ifindex(netdev
, message
);
2583 log_netdev_warning_errno(netdev
, r
, "Could not process new link message for netdev, ignoring: %m");
2589 /* link is new, so add it */
2590 r
= link_new(manager
, message
, &link
);
2592 log_warning_errno(r
, "Could not process new link message: %m");
2596 r
= link_update(link
, message
);
2598 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2599 link_enter_failed(link
);
2603 r
= link_check_initialized(link
);
2605 log_link_warning_errno(link
, r
, "Failed to check link is initialized: %m");
2606 link_enter_failed(link
);
2610 r
= link_update(link
, message
);
2612 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2613 link_enter_failed(link
);
2617 r
= link_reconfigure_impl(link
, /* force = */ false);
2619 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
2620 link_enter_failed(link
);
2629 netdev_drop(netdev
);
2633 assert_not_reached();
2639 int link_getlink_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, const char *error_msg
) {
2640 uint16_t message_type
;
2647 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2650 r
= sd_netlink_message_get_errno(m
);
2652 log_link_message_warning_errno(link
, m
, r
, error_msg
);
2653 link_enter_failed(link
);
2657 r
= sd_netlink_message_get_type(m
, &message_type
);
2659 log_link_debug_errno(link
, r
, "rtnl: failed to read link message type, ignoring: %m");
2662 if (message_type
!= RTM_NEWLINK
) {
2663 log_link_debug(link
, "rtnl: received invalid link message type, ignoring.");
2667 r
= link_update(link
, m
);
2669 link_enter_failed(link
);
2676 int link_call_getlink(Link
*link
, link_netlink_message_handler_t callback
) {
2677 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2681 assert(link
->manager
);
2682 assert(link
->manager
->rtnl
);
2685 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
, link
->ifindex
);
2689 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
,
2690 link_netlink_destroy_callback
, link
);
2698 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
2699 [LINK_STATE_PENDING
] = "pending",
2700 [LINK_STATE_INITIALIZED
] = "initialized",
2701 [LINK_STATE_CONFIGURING
] = "configuring",
2702 [LINK_STATE_CONFIGURED
] = "configured",
2703 [LINK_STATE_UNMANAGED
] = "unmanaged",
2704 [LINK_STATE_FAILED
] = "failed",
2705 [LINK_STATE_LINGER
] = "linger",
2708 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
2710 int link_flags_to_string_alloc(uint32_t flags
, char **ret
) {
2711 _cleanup_free_
char *str
= NULL
;
2712 static const char* map
[] = {
2713 [LOG2U(IFF_UP
)] = "up", /* interface is up. */
2714 [LOG2U(IFF_BROADCAST
)] = "broadcast", /* broadcast address valid. */
2715 [LOG2U(IFF_DEBUG
)] = "debug", /* turn on debugging. */
2716 [LOG2U(IFF_LOOPBACK
)] = "loopback", /* interface is a loopback net. */
2717 [LOG2U(IFF_POINTOPOINT
)] = "point-to-point", /* interface has p-p link. */
2718 [LOG2U(IFF_NOTRAILERS
)] = "no-trailers", /* avoid use of trailers. */
2719 [LOG2U(IFF_RUNNING
)] = "running", /* interface RFC2863 OPER_UP. */
2720 [LOG2U(IFF_NOARP
)] = "no-arp", /* no ARP protocol. */
2721 [LOG2U(IFF_PROMISC
)] = "promiscuous", /* receive all packets. */
2722 [LOG2U(IFF_ALLMULTI
)] = "all-multicast", /* receive all multicast packets. */
2723 [LOG2U(IFF_MASTER
)] = "master", /* master of a load balancer. */
2724 [LOG2U(IFF_SLAVE
)] = "slave", /* slave of a load balancer. */
2725 [LOG2U(IFF_MULTICAST
)] = "multicast", /* supports multicast. */
2726 [LOG2U(IFF_PORTSEL
)] = "portsel", /* can set media type. */
2727 [LOG2U(IFF_AUTOMEDIA
)] = "auto-media", /* auto media select active. */
2728 [LOG2U(IFF_DYNAMIC
)] = "dynamic", /* dialup device with changing addresses. */
2729 [LOG2U(IFF_LOWER_UP
)] = "lower-up", /* driver signals L1 up. */
2730 [LOG2U(IFF_DORMANT
)] = "dormant", /* driver signals dormant. */
2731 [LOG2U(IFF_ECHO
)] = "echo", /* echo sent packets. */
2736 for (size_t i
= 0; i
< ELEMENTSOF(map
); i
++)
2737 if (FLAGS_SET(flags
, 1 << i
) && map
[i
])
2738 if (!strextend_with_separator(&str
, ",", map
[i
]))
2741 *ret
= TAKE_PTR(str
);
2745 static const char * const kernel_operstate_table
[] = {
2746 [IF_OPER_UNKNOWN
] = "unknown",
2747 [IF_OPER_NOTPRESENT
] = "not-present",
2748 [IF_OPER_DOWN
] = "down",
2749 [IF_OPER_LOWERLAYERDOWN
] = "lower-layer-down",
2750 [IF_OPER_TESTING
] = "testing",
2751 [IF_OPER_DORMANT
] = "dormant",
2752 [IF_OPER_UP
] = "up",
2755 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate
, int);