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"
62 #include "socket-util.h"
63 #include "stdio-util.h"
64 #include "string-table.h"
67 #include "tmpfile-util.h"
69 #include "udev-util.h"
72 bool link_ipv6_enabled(Link
*link
) {
75 if (!socket_ipv6_is_supported())
78 if (link
->iftype
== ARPHRD_CAN
)
84 if (link
->network
->bond
)
87 if (link_may_have_ipv6ll(link
, /* check_multicast = */ false))
90 if (network_has_static_ipv6_configurations(link
->network
))
96 static bool link_is_ready_to_configure_one(Link
*link
, bool allow_unmanaged
) {
99 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
, LINK_STATE_UNMANAGED
))
103 return allow_unmanaged
;
105 if (!link
->network
->configure_without_carrier
) {
106 if (link
->set_flags_messages
> 0)
109 if (!link_has_carrier(link
))
113 if (link
->set_link_messages
> 0)
116 if (!link
->activated
)
122 bool link_is_ready_to_configure(Link
*link
, bool allow_unmanaged
) {
123 return check_ready_for_all_sr_iov_ports(link
, allow_unmanaged
, link_is_ready_to_configure_one
);
126 void link_ntp_settings_clear(Link
*link
) {
127 link
->ntp
= strv_free(link
->ntp
);
130 void link_dns_settings_clear(Link
*link
) {
131 if (link
->n_dns
!= UINT_MAX
)
132 for (unsigned i
= 0; i
< link
->n_dns
; i
++)
133 in_addr_full_free(link
->dns
[i
]);
134 link
->dns
= mfree(link
->dns
);
135 link
->n_dns
= UINT_MAX
;
137 link
->search_domains
= ordered_set_free(link
->search_domains
);
138 link
->route_domains
= ordered_set_free(link
->route_domains
);
140 link
->dns_default_route
= -1;
141 link
->llmnr
= _RESOLVE_SUPPORT_INVALID
;
142 link
->mdns
= _RESOLVE_SUPPORT_INVALID
;
143 link
->dnssec_mode
= _DNSSEC_MODE_INVALID
;
144 link
->dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
;
146 link
->dnssec_negative_trust_anchors
= set_free_free(link
->dnssec_negative_trust_anchors
);
149 static void link_free_engines(Link
*link
) {
153 link
->dhcp_server
= sd_dhcp_server_unref(link
->dhcp_server
);
155 link
->dhcp_client
= sd_dhcp_client_unref(link
->dhcp_client
);
156 link
->dhcp_lease
= sd_dhcp_lease_unref(link
->dhcp_lease
);
157 link
->dhcp4_6rd_tunnel_name
= mfree(link
->dhcp4_6rd_tunnel_name
);
159 link
->lldp_rx
= sd_lldp_rx_unref(link
->lldp_rx
);
160 link
->lldp_tx
= sd_lldp_tx_unref(link
->lldp_tx
);
162 link
->ipv4ll
= sd_ipv4ll_unref(link
->ipv4ll
);
164 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
165 link
->dhcp6_lease
= sd_dhcp6_lease_unref(link
->dhcp6_lease
);
167 link
->ndisc
= sd_ndisc_unref(link
->ndisc
);
168 link
->ndisc_expire
= sd_event_source_disable_unref(link
->ndisc_expire
);
171 link
->radv
= sd_radv_unref(link
->radv
);
174 static Link
*link_free(Link
*link
) {
177 link_ntp_settings_clear(link
);
178 link_dns_settings_clear(link
);
180 link
->routes
= set_free(link
->routes
);
181 link
->nexthops
= set_free(link
->nexthops
);
182 link
->neighbors
= set_free(link
->neighbors
);
183 link
->addresses
= set_free(link
->addresses
);
184 link
->qdiscs
= set_free(link
->qdiscs
);
185 link
->tclasses
= set_free(link
->tclasses
);
187 link
->dhcp_pd_prefixes
= set_free(link
->dhcp_pd_prefixes
);
189 link_free_engines(link
);
191 set_free(link
->sr_iov_virt_port_ifindices
);
193 strv_free(link
->alternative_names
);
196 free(link
->previous_ssid
);
199 unlink_and_free(link
->lease_file
);
200 unlink_and_free(link
->lldp_file
);
201 unlink_and_free(link
->state_file
);
203 sd_device_unref(link
->dev
);
204 netdev_unref(link
->netdev
);
206 hashmap_free(link
->bound_to_links
);
207 hashmap_free(link
->bound_by_links
);
209 set_free_with_destructor(link
->slaves
, link_unref
);
211 network_unref(link
->network
);
213 sd_event_source_disable_unref(link
->carrier_lost_timer
);
218 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link
, link
, link_free
);
220 int link_get_by_index(Manager
*m
, int ifindex
, Link
**ret
) {
226 link
= hashmap_get(m
->links_by_index
, INT_TO_PTR(ifindex
));
235 int link_get_by_name(Manager
*m
, const char *ifname
, Link
**ret
) {
241 link
= hashmap_get(m
->links_by_name
, ifname
);
250 int link_get_by_hw_addr(Manager
*m
, const struct hw_addr_data
*hw_addr
, Link
**ret
) {
256 link
= hashmap_get(m
->links_by_hw_addr
, hw_addr
);
265 int link_get_master(Link
*link
, Link
**ret
) {
267 assert(link
->manager
);
270 if (link
->master_ifindex
<= 0 || link
->master_ifindex
== link
->ifindex
)
273 return link_get_by_index(link
->manager
, link
->master_ifindex
, ret
);
276 void link_set_state(Link
*link
, LinkState state
) {
279 if (link
->state
== state
)
282 log_link_debug(link
, "State changed: %s -> %s",
283 link_state_to_string(link
->state
),
284 link_state_to_string(state
));
288 link_send_changed(link
, "AdministrativeState", NULL
);
292 int link_stop_engines(Link
*link
, bool may_keep_dhcp
) {
296 assert(link
->manager
);
297 assert(link
->manager
->event
);
299 bool keep_dhcp
= may_keep_dhcp
&&
301 !link
->network
->dhcp_send_decline
&& /* IPv4 ACD for the DHCPv4 address is running. */
302 (link
->manager
->restarting
||
303 FLAGS_SET(link
->network
->keep_configuration
, KEEP_CONFIGURATION_DHCP_ON_STOP
));
306 k
= sd_dhcp_client_stop(link
->dhcp_client
);
308 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 client: %m");
311 k
= sd_dhcp_server_stop(link
->dhcp_server
);
313 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv4 server: %m");
315 k
= sd_lldp_rx_stop(link
->lldp_rx
);
317 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Rx: %m");
319 k
= sd_lldp_tx_stop(link
->lldp_tx
);
321 r
= log_link_warning_errno(link
, k
, "Could not stop LLDP Tx: %m");
323 k
= sd_ipv4ll_stop(link
->ipv4ll
);
325 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 link-local: %m");
327 k
= ipv4acd_stop(link
);
329 r
= log_link_warning_errno(link
, k
, "Could not stop IPv4 ACD client: %m");
331 k
= sd_dhcp6_client_stop(link
->dhcp6_client
);
333 r
= log_link_warning_errno(link
, k
, "Could not stop DHCPv6 client: %m");
335 k
= dhcp_pd_remove(link
, /* only_marked = */ false);
337 r
= log_link_warning_errno(link
, k
, "Could not remove DHCPv6 PD addresses and routes: %m");
339 k
= ndisc_stop(link
);
341 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Discovery: %m");
345 k
= sd_radv_stop(link
->radv
);
347 r
= log_link_warning_errno(link
, k
, "Could not stop IPv6 Router Advertisement: %m");
352 void link_enter_failed(Link
*link
) {
355 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
358 log_link_warning(link
, "Failed");
360 link_set_state(link
, LINK_STATE_FAILED
);
362 (void) link_stop_engines(link
, false);
365 void link_check_ready(Link
*link
) {
370 if (link
->state
== LINK_STATE_CONFIGURED
)
373 if (link
->state
!= LINK_STATE_CONFIGURING
)
374 return (void) log_link_debug(link
, "%s(): link is in %s state.", __func__
, link_state_to_string(link
->state
));
377 return (void) log_link_debug(link
, "%s(): link is unmanaged.", __func__
);
379 if (!link
->tc_configured
)
380 return (void) log_link_debug(link
, "%s(): traffic controls are not configured.", __func__
);
382 if (link
->set_link_messages
> 0)
383 return (void) log_link_debug(link
, "%s(): link layer is configuring.", __func__
);
385 if (!link
->activated
)
386 return (void) log_link_debug(link
, "%s(): link is not activated.", __func__
);
388 if (link
->iftype
== ARPHRD_CAN
) {
389 /* let's shortcut things for CAN which doesn't need most of checks below. */
390 link_set_state(link
, LINK_STATE_CONFIGURED
);
394 if (!link
->stacked_netdevs_created
)
395 return (void) log_link_debug(link
, "%s(): stacked netdevs are not created.", __func__
);
397 if (!link
->static_addresses_configured
)
398 return (void) log_link_debug(link
, "%s(): static addresses are not configured.", __func__
);
400 SET_FOREACH(a
, link
->addresses
)
401 if (!address_is_ready(a
))
402 return (void) log_link_debug(link
, "%s(): address %s is not ready.", __func__
,
403 IN_ADDR_PREFIX_TO_STRING(a
->family
, &a
->in_addr
, a
->prefixlen
));
405 if (!link
->static_address_labels_configured
)
406 return (void) log_link_debug(link
, "%s(): static address labels are not configured.", __func__
);
408 if (!link
->static_bridge_fdb_configured
)
409 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
411 if (!link
->static_bridge_mdb_configured
)
412 return (void) log_link_debug(link
, "%s(): static bridge MDB entries are not configured.", __func__
);
414 if (!link
->static_ipv6_proxy_ndp_configured
)
415 return (void) log_link_debug(link
, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__
);
417 if (!link
->static_neighbors_configured
)
418 return (void) log_link_debug(link
, "%s(): static neighbors are not configured.", __func__
);
420 if (!link
->static_nexthops_configured
)
421 return (void) log_link_debug(link
, "%s(): static nexthops are not configured.", __func__
);
423 if (!link
->static_routes_configured
)
424 return (void) log_link_debug(link
, "%s(): static routes are not configured.", __func__
);
426 if (!link
->static_routing_policy_rules_configured
)
427 return (void) log_link_debug(link
, "%s(): static routing policy rules are not configured.", __func__
);
429 if (!link
->sr_iov_configured
)
430 return (void) log_link_debug(link
, "%s(): SR-IOV is not configured.", __func__
);
432 /* IPv6LL is assigned after the link gains its carrier. */
433 if (!link
->network
->configure_without_carrier
&&
434 link_ipv6ll_enabled(link
) &&
435 !in6_addr_is_set(&link
->ipv6ll_address
))
436 return (void) log_link_debug(link
, "%s(): IPv6LL is not configured yet.", __func__
);
438 bool has_dynamic_address
= false;
439 SET_FOREACH(a
, link
->addresses
) {
440 if (address_is_marked(a
))
442 if (!address_exists(a
))
444 if (IN_SET(a
->source
,
445 NETWORK_CONFIG_SOURCE_IPV4LL
,
446 NETWORK_CONFIG_SOURCE_DHCP4
,
447 NETWORK_CONFIG_SOURCE_DHCP6
,
448 NETWORK_CONFIG_SOURCE_DHCP_PD
,
449 NETWORK_CONFIG_SOURCE_NDISC
)) {
450 has_dynamic_address
= true;
455 if ((link_ipv4ll_enabled(link
) || link_dhcp4_enabled(link
) || link_dhcp6_with_address_enabled(link
) ||
456 (link_dhcp_pd_is_enabled(link
) && link
->network
->dhcp_pd_assign
)) && !has_dynamic_address
)
457 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
458 return (void) log_link_debug(link
, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__
);
460 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
461 if (link_ipv4ll_enabled(link
) || link_dhcp4_enabled(link
) ||
462 link_dhcp6_enabled(link
) || link_dhcp_pd_is_enabled(link
) ||
463 (!link
->network
->configure_without_carrier
&& link_ipv6_accept_ra_enabled(link
))) {
465 if (!link
->ipv4ll_address_configured
&& !link
->dhcp4_configured
&&
466 !link
->dhcp6_configured
&& !link
->dhcp_pd_configured
&& !link
->ndisc_configured
)
467 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
468 return (void) log_link_debug(link
, "%s(): dynamic addresses or routes are not configured.", __func__
);
470 log_link_debug(link
, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
472 yes_no(link
->ipv4ll_address_configured
),
473 yes_no(link
->dhcp4_configured
),
474 yes_no(link
->dhcp6_configured
),
475 yes_no(link
->dhcp_pd_configured
),
476 yes_no(link
->ndisc_configured
));
479 link_set_state(link
, LINK_STATE_CONFIGURED
);
482 static int link_request_static_configs(Link
*link
) {
486 assert(link
->network
);
487 assert(link
->state
!= _LINK_STATE_INVALID
);
489 r
= link_request_static_addresses(link
);
493 r
= link_request_static_address_labels(link
);
497 r
= link_request_static_bridge_fdb(link
);
501 r
= link_request_static_bridge_mdb(link
);
505 r
= link_request_static_ipv6_proxy_ndp_addresses(link
);
509 r
= link_request_static_neighbors(link
);
513 r
= link_request_static_nexthops(link
, false);
517 r
= link_request_static_routes(link
, false);
521 r
= link_request_static_routing_policy_rules(link
);
528 static int link_request_stacked_netdevs(Link
*link
) {
534 link
->stacked_netdevs_created
= false;
536 HASHMAP_FOREACH(netdev
, link
->network
->stacked_netdevs
) {
537 r
= link_request_stacked_netdev(link
, netdev
);
542 if (link
->create_stacked_netdev_messages
== 0) {
543 link
->stacked_netdevs_created
= true;
544 link_check_ready(link
);
550 static int link_acquire_dynamic_ipv6_conf(Link
*link
) {
555 r
= radv_start(link
);
557 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Advertisement engine: %m");
559 r
= ndisc_start(link
);
561 return log_link_warning_errno(link
, r
, "Failed to start IPv6 Router Discovery: %m");
563 r
= dhcp6_start(link
);
565 return log_link_warning_errno(link
, r
, "Failed to start DHCPv6 client: %m");
570 static int link_acquire_dynamic_ipv4_conf(Link
*link
) {
574 assert(link
->manager
);
575 assert(link
->manager
->event
);
577 if (link
->dhcp_client
) {
578 r
= dhcp4_start(link
);
580 return log_link_warning_errno(link
, r
, "Failed to start DHCPv4 client: %m");
582 log_link_debug(link
, "Acquiring DHCPv4 lease.");
584 } else if (link
->ipv4ll
) {
585 if (in4_addr_is_set(&link
->network
->ipv4ll_start_address
)) {
586 r
= sd_ipv4ll_set_address(link
->ipv4ll
, &link
->network
->ipv4ll_start_address
);
588 return log_link_warning_errno(link
, r
, "Could not set IPv4 link-local start address: %m");
591 r
= sd_ipv4ll_start(link
->ipv4ll
);
593 return log_link_warning_errno(link
, r
, "Could not acquire IPv4 link-local address: %m");
595 log_link_debug(link
, "Acquiring IPv4 link-local address.");
598 if (link
->dhcp_server
) {
599 r
= sd_dhcp_server_start(link
->dhcp_server
);
601 return log_link_warning_errno(link
, r
, "Could not start DHCP server: %m");
604 r
= ipv4acd_start(link
);
606 return log_link_warning_errno(link
, r
, "Could not start IPv4 ACD client: %m");
611 static int link_acquire_dynamic_conf(Link
*link
) {
615 assert(link
->network
);
617 r
= link_acquire_dynamic_ipv4_conf(link
);
621 if (in6_addr_is_set(&link
->ipv6ll_address
)) {
622 r
= link_acquire_dynamic_ipv6_conf(link
);
627 if (!link_radv_enabled(link
) || !link
->network
->dhcp_pd_announce
) {
628 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
629 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
630 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
631 * below will be called in radv_start(). */
632 r
= dhcp_request_prefix_delegation(link
);
634 return log_link_warning_errno(link
, r
, "Failed to request DHCP delegated subnet prefix: %m");
638 r
= sd_lldp_tx_start(link
->lldp_tx
);
640 return log_link_warning_errno(link
, r
, "Failed to start LLDP transmission: %m");
644 r
= sd_lldp_rx_start(link
->lldp_rx
);
646 return log_link_warning_errno(link
, r
, "Failed to start LLDP client: %m");
652 int link_ipv6ll_gained(Link
*link
) {
657 log_link_info(link
, "Gained IPv6LL");
659 if (!IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
))
662 r
= link_acquire_dynamic_ipv6_conf(link
);
666 link_check_ready(link
);
670 int link_handle_bound_to_list(Link
*link
) {
671 bool required_up
= false;
672 bool link_is_up
= false;
677 /* If at least one interface in bound_to_links has carrier, then make this interface up.
678 * If all interfaces in bound_to_links do not, then make this interface down. */
680 if (hashmap_isempty(link
->bound_to_links
))
683 if (link
->flags
& IFF_UP
)
686 HASHMAP_FOREACH(l
, link
->bound_to_links
)
687 if (link_has_carrier(l
)) {
692 if (!required_up
&& link_is_up
)
693 return link_request_to_bring_up_or_down(link
, /* up = */ false);
694 if (required_up
&& !link_is_up
)
695 return link_request_to_bring_up_or_down(link
, /* up = */ true);
700 static int link_handle_bound_by_list(Link
*link
) {
706 /* Update up or down state of interfaces which depend on this interface's carrier state. */
708 if (hashmap_isempty(link
->bound_by_links
))
711 HASHMAP_FOREACH(l
, link
->bound_by_links
) {
712 r
= link_handle_bound_to_list(l
);
720 static int link_put_carrier(Link
*link
, Link
*carrier
, Hashmap
**h
) {
729 if (hashmap_get(*h
, INT_TO_PTR(carrier
->ifindex
)))
732 r
= hashmap_ensure_put(h
, NULL
, INT_TO_PTR(carrier
->ifindex
), carrier
);
741 static int link_new_bound_by_list(Link
*link
) {
747 assert(link
->manager
);
751 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
752 if (!carrier
->network
)
755 if (strv_isempty(carrier
->network
->bind_carrier
))
758 if (strv_fnmatch(carrier
->network
->bind_carrier
, link
->ifname
)) {
759 r
= link_put_carrier(link
, carrier
, &link
->bound_by_links
);
765 HASHMAP_FOREACH(carrier
, link
->bound_by_links
) {
766 r
= link_put_carrier(carrier
, link
, &carrier
->bound_to_links
);
774 static int link_new_bound_to_list(Link
*link
) {
780 assert(link
->manager
);
785 if (strv_isempty(link
->network
->bind_carrier
))
790 HASHMAP_FOREACH(carrier
, m
->links_by_index
) {
791 if (strv_fnmatch(link
->network
->bind_carrier
, carrier
->ifname
)) {
792 r
= link_put_carrier(link
, carrier
, &link
->bound_to_links
);
798 HASHMAP_FOREACH(carrier
, link
->bound_to_links
) {
799 r
= link_put_carrier(carrier
, link
, &carrier
->bound_by_links
);
807 static void link_free_bound_to_list(Link
*link
) {
808 bool updated
= false;
813 while ((bound_to
= hashmap_steal_first(link
->bound_to_links
))) {
816 if (hashmap_remove(bound_to
->bound_by_links
, INT_TO_PTR(link
->ifindex
)))
817 link_dirty(bound_to
);
824 static void link_free_bound_by_list(Link
*link
) {
825 bool updated
= false;
830 while ((bound_by
= hashmap_steal_first(link
->bound_by_links
))) {
833 if (hashmap_remove(bound_by
->bound_to_links
, INT_TO_PTR(link
->ifindex
))) {
834 link_dirty(bound_by
);
835 link_handle_bound_to_list(bound_by
);
843 static int link_append_to_master(Link
*link
) {
849 /* - The link may have no master.
850 * - RTM_NEWLINK message about master interface may not be received yet. */
851 if (link_get_master(link
, &master
) < 0)
854 r
= set_ensure_put(&master
->slaves
, NULL
, link
);
862 static void link_drop_from_master(Link
*link
) {
870 if (link_get_master(link
, &master
) < 0)
873 link_unref(set_remove(master
->slaves
, link
));
876 static void link_drop_requests(Link
*link
) {
880 assert(link
->manager
);
882 ORDERED_SET_FOREACH(req
, link
->manager
->request_queue
)
883 if (req
->link
== link
)
884 request_detach(link
->manager
, req
);
887 static Link
*link_drop(Link
*link
) {
891 assert(link
->manager
);
893 link_set_state(link
, LINK_STATE_LINGER
);
895 /* Drop all references from other links and manager. Note that async netlink calls may have
896 * references to the link, and they will be dropped when we receive replies. */
898 link_drop_requests(link
);
900 link_free_bound_to_list(link
);
901 link_free_bound_by_list(link
);
903 link_clear_sr_iov_ifindices(link
);
905 link_drop_from_master(link
);
907 if (link
->state_file
)
908 (void) unlink(link
->state_file
);
912 STRV_FOREACH(n
, link
->alternative_names
)
913 hashmap_remove(link
->manager
->links_by_name
, *n
);
914 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
916 /* bonding master and its slaves have the same hardware address. */
917 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
919 /* The following must be called at last. */
920 assert_se(hashmap_remove(link
->manager
->links_by_index
, INT_TO_PTR(link
->ifindex
)) == link
);
921 return link_unref(link
);
924 static int link_drop_foreign_config(Link
*link
) {
928 assert(link
->manager
);
930 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
931 * to remove loopback address or addresses used for root NFS. */
933 if (IN_SET(link
->state
, LINK_STATE_UNMANAGED
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
))
935 if (FLAGS_SET(link
->flags
, IFF_LOOPBACK
))
937 if (link
->network
->keep_configuration
== KEEP_CONFIGURATION_YES
)
940 r
= link_drop_foreign_routes(link
);
942 k
= link_drop_foreign_nexthops(link
);
946 k
= link_drop_foreign_addresses(link
);
950 k
= link_drop_foreign_neighbors(link
);
954 k
= manager_drop_foreign_routing_policy_rules(link
->manager
);
961 static int link_drop_managed_config(Link
*link
) {
965 assert(link
->manager
);
967 r
= link_drop_managed_routes(link
);
969 k
= link_drop_managed_nexthops(link
);
973 k
= link_drop_managed_addresses(link
);
977 k
= link_drop_managed_neighbors(link
);
981 k
= link_drop_managed_routing_policy_rules(link
);
988 static void link_foreignize_config(Link
*link
) {
990 assert(link
->manager
);
992 link_foreignize_routes(link
);
993 link_foreignize_nexthops(link
);
994 link_foreignize_addresses(link
);
995 link_foreignize_neighbors(link
);
996 link_foreignize_routing_policy_rules(link
);
999 static int link_configure(Link
*link
) {
1003 assert(link
->network
);
1004 assert(link
->state
== LINK_STATE_INITIALIZED
);
1006 link_set_state(link
, LINK_STATE_CONFIGURING
);
1008 r
= link_new_bound_to_list(link
);
1012 r
= link_request_traffic_control(link
);
1016 if (link
->iftype
== ARPHRD_CAN
) {
1017 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1018 r
= link_request_to_set_can(link
);
1022 return link_request_to_activate(link
);
1025 r
= link_request_sr_iov_vfs(link
);
1029 r
= link_set_sysctl(link
);
1033 r
= link_request_to_set_mac(link
, /* allow_retry = */ true);
1037 r
= link_request_to_set_ipoib(link
);
1041 r
= link_request_to_set_flags(link
);
1045 r
= link_request_to_set_group(link
);
1049 r
= link_configure_mtu(link
);
1053 r
= link_request_to_set_addrgen_mode(link
);
1057 r
= link_request_to_set_master(link
);
1061 r
= link_request_stacked_netdevs(link
);
1065 r
= link_request_to_set_bond(link
);
1069 r
= link_request_to_set_bridge(link
);
1073 r
= link_request_to_set_bridge_vlan(link
);
1077 r
= link_request_to_activate(link
);
1081 r
= ipv4ll_configure(link
);
1085 r
= link_request_dhcp4_client(link
);
1089 r
= link_request_dhcp6_client(link
);
1093 r
= link_request_ndisc(link
);
1097 r
= link_request_dhcp_server(link
);
1101 r
= link_request_radv(link
);
1105 r
= link_lldp_rx_configure(link
);
1109 r
= link_lldp_tx_configure(link
);
1113 r
= link_drop_foreign_config(link
);
1117 r
= link_request_static_configs(link
);
1121 if (!link_has_carrier(link
))
1124 return link_acquire_dynamic_conf(link
);
1127 static int link_get_network(Link
*link
, Network
**ret
) {
1132 assert(link
->manager
);
1135 ORDERED_HASHMAP_FOREACH(network
, link
->manager
->networks
) {
1138 r
= net_match_config(
1142 &link
->permanent_hw_addr
,
1147 link
->alternative_names
,
1156 if (network
->match
.ifname
&& link
->dev
) {
1157 uint8_t name_assign_type
= NET_NAME_UNKNOWN
;
1160 if (sd_device_get_sysattr_value(link
->dev
, "name_assign_type", &attr
) >= 0)
1161 (void) safe_atou8(attr
, &name_assign_type
);
1163 warn
= name_assign_type
== NET_NAME_ENUM
;
1166 log_link_full(link
, warn
? LOG_WARNING
: LOG_DEBUG
,
1167 "found matching network '%s'%s.",
1169 warn
? ", based on potentially unpredictable interface name" : "");
1171 if (network
->unmanaged
)
1181 static int link_reconfigure_impl(Link
*link
, bool force
) {
1182 Network
*network
= NULL
;
1183 NetDev
*netdev
= NULL
;
1188 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_LINGER
))
1191 r
= netdev_get(link
->manager
, link
->ifname
, &netdev
);
1192 if (r
< 0 && r
!= -ENOENT
)
1195 r
= link_get_network(link
, &network
);
1196 if (r
< 0 && r
!= -ENOENT
)
1199 if (link
->state
!= LINK_STATE_UNMANAGED
&& !network
)
1200 /* If link is in initialized state, then link->network is also NULL. */
1203 if (link
->network
== network
&& !force
)
1207 if (link
->state
== LINK_STATE_INITIALIZED
)
1208 log_link_info(link
, "Configuring with %s.", network
->filename
);
1210 log_link_info(link
, "Reconfiguring with %s.", network
->filename
);
1212 log_link_full(link
, link
->state
== LINK_STATE_INITIALIZED
? LOG_DEBUG
: LOG_INFO
,
1213 "Unmanaging interface.");
1215 /* Dropping old .network file */
1216 r
= link_stop_engines(link
, false);
1220 link_drop_requests(link
);
1222 if (network
&& !force
&& network
->keep_configuration
!= KEEP_CONFIGURATION_YES
)
1223 /* When a new/updated .network file is assigned, first make all configs (addresses,
1224 * routes, and so on) foreign, and then drop unnecessary configs later by
1225 * link_drop_foreign_config() in link_configure().
1226 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1227 * here we need to drop the configs such as addresses, routes, and so on configured by
1228 * the previously assigned .network file. */
1229 link_foreignize_config(link
);
1231 /* Remove all managed configs. Note, foreign configs are removed in later by
1232 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1233 r
= link_drop_managed_config(link
);
1238 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1239 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1240 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1241 * map here, as it depends on .network files assigned to other links. */
1242 link_free_bound_to_list(link
);
1244 link_free_engines(link
);
1245 link
->network
= network_unref(link
->network
);
1247 netdev_unref(link
->netdev
);
1248 link
->netdev
= netdev_ref(netdev
);
1251 link_set_state(link
, LINK_STATE_UNMANAGED
);
1255 /* Then, apply new .network file */
1256 link
->network
= network_ref(network
);
1257 link_update_operstate(link
, true);
1260 link_set_state(link
, LINK_STATE_INITIALIZED
);
1261 link
->activated
= false;
1263 r
= link_configure(link
);
1270 static int link_reconfigure_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, bool force
) {
1275 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to update link state");
1279 r
= link_reconfigure_impl(link
, force
);
1281 link_enter_failed(link
);
1288 static int link_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1289 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ false);
1292 static int link_force_reconfigure_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1293 return link_reconfigure_handler_internal(rtnl
, m
, link
, /* force = */ true);
1296 int link_reconfigure(Link
*link
, bool force
) {
1301 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1302 * the function from being called multiple times simultaneously, refuse to reconfigure the
1303 * interface in these cases. */
1304 if (IN_SET(link
->state
, LINK_STATE_PENDING
, LINK_STATE_INITIALIZED
, LINK_STATE_LINGER
))
1305 return 0; /* 0 means no-op. */
1307 r
= link_call_getlink(link
, force
? link_force_reconfigure_handler
: link_reconfigure_handler
);
1311 return 1; /* 1 means the interface will be reconfigured. */
1314 static int link_initialized_and_synced(Link
*link
) {
1318 assert(link
->manager
);
1320 if (link
->manager
->test_mode
) {
1321 log_link_debug(link
, "Running in test mode, refusing to enter initialized state.");
1322 link_set_state(link
, LINK_STATE_UNMANAGED
);
1326 if (link
->state
== LINK_STATE_PENDING
) {
1327 log_link_debug(link
, "Link state is up-to-date");
1328 link_set_state(link
, LINK_STATE_INITIALIZED
);
1330 r
= link_new_bound_by_list(link
);
1334 r
= link_handle_bound_by_list(link
);
1339 return link_reconfigure_impl(link
, /* force = */ false);
1342 static int link_initialized_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
) {
1345 r
= link_getlink_handler_internal(rtnl
, m
, link
, "Failed to wait for the interface to be initialized");
1349 r
= link_initialized_and_synced(link
);
1351 link_enter_failed(link
);
1356 static int link_initialized(Link
*link
, sd_device
*device
) {
1362 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1363 * or sysattrs) may be outdated. */
1364 device_unref_and_replace(link
->dev
, device
);
1366 if (link
->dhcp_client
) {
1367 r
= sd_dhcp_client_attach_device(link
->dhcp_client
, link
->dev
);
1369 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv4 client, ignoring: %m");
1372 if (link
->dhcp6_client
) {
1373 r
= sd_dhcp6_client_attach_device(link
->dhcp6_client
, link
->dev
);
1375 log_link_warning_errno(link
, r
, "Failed to attach device to DHCPv6 client, ignoring: %m");
1378 r
= link_set_sr_iov_ifindices(link
);
1380 log_link_warning_errno(link
, r
, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1382 if (link
->state
!= LINK_STATE_PENDING
)
1383 return link_reconfigure(link
, /* force = */ false);
1385 log_link_debug(link
, "udev initialized link");
1387 /* udev has initialized the link, but we don't know if we have yet
1388 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1389 * when it returns we know that the pending NEWLINKs have already been
1390 * processed and that we are up-to-date */
1392 return link_call_getlink(link
, link_initialized_handler
);
1395 static int link_check_initialized(Link
*link
) {
1396 _cleanup_(sd_device_unrefp
) sd_device
*device
= NULL
;
1401 if (!udev_available())
1402 return link_initialized_and_synced(link
);
1404 /* udev should be around */
1405 r
= sd_device_new_from_ifindex(&device
, link
->ifindex
);
1407 log_link_debug_errno(link
, r
, "Could not find device, waiting for device initialization: %m");
1411 r
= sd_device_get_is_initialized(device
);
1413 return log_link_warning_errno(link
, r
, "Could not determine whether the device is initialized: %m");
1416 log_link_debug(link
, "link pending udev initialization...");
1420 r
= device_is_renaming(device
);
1422 return log_link_warning_errno(link
, r
, "Failed to determine the device is being renamed: %m");
1424 log_link_debug(link
, "Interface is being renamed, pending initialization.");
1428 return link_initialized(link
, device
);
1431 int manager_udev_process_link(Manager
*m
, sd_device
*device
, sd_device_action_t action
) {
1438 r
= sd_device_get_ifindex(device
, &ifindex
);
1440 return log_device_debug_errno(device
, r
, "Failed to get ifindex: %m");
1442 r
= link_get_by_index(m
, ifindex
, &link
);
1444 /* This error is not critical, as the corresponding rtnl message may be received later. */
1445 log_device_debug_errno(device
, r
, "Failed to get link from ifindex %i, ignoring: %m", ifindex
);
1449 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1450 * object here. It will be removed only when rtnetlink says so. */
1451 if (action
== SD_DEVICE_REMOVE
) {
1452 link
->dev
= sd_device_unref(link
->dev
);
1456 r
= device_is_renaming(device
);
1458 return log_device_debug_errno(device
, r
, "Failed to determine if the device is renaming or not: %m");
1460 log_device_debug(device
, "Device is renaming, waiting for the interface to be renamed.");
1462 * What happens when a device is initialized, then soon renamed after that? When we detect
1463 * such, maybe we should cancel or postpone all queued requests for the interface. */
1467 r
= link_initialized(link
, device
);
1469 link_enter_failed(link
);
1474 static int link_carrier_gained(Link
*link
) {
1475 bool force_reconfigure
;
1480 r
= event_source_disable(link
->carrier_lost_timer
);
1482 log_link_warning_errno(link
, r
, "Failed to disable carrier lost timer, ignoring: %m");
1484 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1485 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1486 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1487 * restarted, and the correct network information will be gained.
1489 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1490 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1491 * already assigned to the interface (in that case, the .network file does not have the SSID=
1492 * setting in the [Match] section), and the interface is already being configured. Of course,
1493 * there may exist another .network file with higher priority and a matching SSID= setting. But
1494 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1496 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1497 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1498 force_reconfigure
= link
->previous_ssid
&& !streq_ptr(link
->previous_ssid
, link
->ssid
);
1499 link
->previous_ssid
= mfree(link
->previous_ssid
);
1501 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1502 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1503 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1504 r
= link_reconfigure_impl(link
, force_reconfigure
);
1508 r
= link_handle_bound_by_list(link
);
1512 if (link
->iftype
== ARPHRD_CAN
)
1513 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1516 if (IN_SET(link
->state
, LINK_STATE_CONFIGURING
, LINK_STATE_CONFIGURED
)) {
1517 r
= link_acquire_dynamic_conf(link
);
1521 r
= link_request_static_configs(link
);
1529 static int link_carrier_lost_impl(Link
*link
) {
1534 link
->previous_ssid
= mfree(link
->previous_ssid
);
1536 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
1542 r
= link_stop_engines(link
, false);
1546 r
= link_drop_managed_config(link
);
1547 if (r
< 0 && ret
>= 0)
1553 static int link_carrier_lost_handler(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
1554 Link
*link
= ASSERT_PTR(userdata
);
1557 r
= link_carrier_lost_impl(link
);
1559 log_link_warning_errno(link
, r
, "Failed to process carrier lost event: %m");
1560 link_enter_failed(link
);
1566 static int link_carrier_lost(Link
*link
) {
1573 r
= link_handle_bound_by_list(link
);
1577 if (link
->iftype
== ARPHRD_CAN
)
1578 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1584 if (link
->network
->ignore_carrier_loss_set
)
1585 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1586 usec
= link
->network
->ignore_carrier_loss_usec
;
1588 else if (link
->network
->bond
&& link
->wlan_iftype
> 0)
1589 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1590 * carrier to be lost. See #19832. */
1591 usec
= 3 * USEC_PER_SEC
;
1593 else if (link
->network
->dhcp_use_mtu
&&
1595 sd_dhcp_lease_get_mtu(link
->dhcp_lease
, &dhcp_mtu
) >= 0 &&
1596 dhcp_mtu
!= link
->original_mtu
)
1597 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1598 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1599 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1600 usec
= 5 * USEC_PER_SEC
;
1603 /* Otherwise, use the currently set value. */
1604 usec
= link
->network
->ignore_carrier_loss_usec
;
1606 if (usec
== USEC_INFINITY
)
1610 return link_carrier_lost_impl(link
);
1612 return event_reset_time_relative(link
->manager
->event
,
1613 &link
->carrier_lost_timer
,
1617 link_carrier_lost_handler
,
1620 "link-carrier-loss",
1624 static int link_admin_state_up(Link
*link
) {
1629 /* This is called every time an interface admin state changes to up;
1630 * specifically, when IFF_UP flag changes from unset to set. */
1635 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_DOWN
) {
1636 log_link_info(link
, "Activation policy is \"always-down\", forcing link down.");
1637 return link_request_to_bring_up_or_down(link
, /* up = */ false);
1640 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1641 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1642 r
= link_set_ipv6_mtu(link
);
1644 log_link_warning_errno(link
, r
, "Cannot set IPv6 MTU, ignoring: %m");
1649 static int link_admin_state_down(Link
*link
) {
1655 if (link
->activated
&& link
->network
->activation_policy
== ACTIVATION_POLICY_ALWAYS_UP
) {
1656 log_link_info(link
, "Activation policy is \"always-up\", forcing link up.");
1657 return link_request_to_bring_up_or_down(link
, /* up = */ true);
1663 static bool link_is_enslaved(Link
*link
) {
1664 if (link
->flags
& IFF_SLAVE
)
1667 if (link
->master_ifindex
> 0)
1673 static LinkAddressState
address_state_from_scope(uint8_t scope
) {
1674 if (scope
< RT_SCOPE_SITE
)
1675 /* universally accessible addresses found */
1676 return LINK_ADDRESS_STATE_ROUTABLE
;
1678 if (scope
< RT_SCOPE_HOST
)
1679 /* only link or site local addresses found */
1680 return LINK_ADDRESS_STATE_DEGRADED
;
1682 /* no useful addresses found */
1683 return LINK_ADDRESS_STATE_OFF
;
1686 void link_update_operstate(Link
*link
, bool also_update_master
) {
1687 LinkOperationalState operstate
;
1688 LinkCarrierState carrier_state
;
1689 LinkAddressState ipv4_address_state
, ipv6_address_state
, address_state
;
1690 LinkOnlineState online_state
;
1691 _cleanup_strv_free_
char **p
= NULL
;
1692 uint8_t ipv4_scope
= RT_SCOPE_NOWHERE
, ipv6_scope
= RT_SCOPE_NOWHERE
;
1693 bool changed
= false;
1698 if (link
->kernel_operstate
== IF_OPER_DORMANT
)
1699 carrier_state
= LINK_CARRIER_STATE_DORMANT
;
1700 else if (link_has_carrier(link
)) {
1701 if (link_is_enslaved(link
))
1702 carrier_state
= LINK_CARRIER_STATE_ENSLAVED
;
1704 carrier_state
= LINK_CARRIER_STATE_CARRIER
;
1705 } else if (link
->flags
& IFF_UP
)
1706 carrier_state
= LINK_CARRIER_STATE_NO_CARRIER
;
1708 carrier_state
= LINK_CARRIER_STATE_OFF
;
1710 if (carrier_state
>= LINK_CARRIER_STATE_CARRIER
) {
1713 SET_FOREACH(slave
, link
->slaves
) {
1714 link_update_operstate(slave
, false);
1716 if (slave
->carrier_state
< LINK_CARRIER_STATE_CARRIER
)
1717 carrier_state
= LINK_CARRIER_STATE_DEGRADED_CARRIER
;
1721 SET_FOREACH(address
, link
->addresses
) {
1722 if (!address_is_ready(address
))
1725 if (address
->family
== AF_INET
)
1726 ipv4_scope
= MIN(ipv4_scope
, address
->scope
);
1728 if (address
->family
== AF_INET6
)
1729 ipv6_scope
= MIN(ipv6_scope
, address
->scope
);
1732 ipv4_address_state
= address_state_from_scope(ipv4_scope
);
1733 ipv6_address_state
= address_state_from_scope(ipv6_scope
);
1734 address_state
= address_state_from_scope(MIN(ipv4_scope
, ipv6_scope
));
1736 /* Mapping of address and carrier state vs operational state
1738 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1739 * ------------------------------------------------------------------------------
1740 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1741 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1742 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1745 if (carrier_state
< LINK_CARRIER_STATE_CARRIER
|| address_state
== LINK_ADDRESS_STATE_OFF
)
1746 operstate
= (LinkOperationalState
) carrier_state
;
1747 else if (address_state
== LINK_ADDRESS_STATE_ROUTABLE
)
1748 operstate
= LINK_OPERSTATE_ROUTABLE
;
1749 else if (carrier_state
== LINK_CARRIER_STATE_CARRIER
)
1750 operstate
= LINK_OPERSTATE_DEGRADED
;
1752 operstate
= LINK_OPERSTATE_ENSLAVED
;
1754 /* Only determine online state for managed links with RequiredForOnline=yes */
1755 if (!link
->network
|| !link
->network
->required_for_online
)
1756 online_state
= _LINK_ONLINE_STATE_INVALID
;
1757 else if (operstate
< link
->network
->required_operstate_for_online
.min
||
1758 operstate
> link
->network
->required_operstate_for_online
.max
)
1759 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1761 AddressFamily required_family
= link
->network
->required_family_for_online
;
1762 bool needs_ipv4
= required_family
& ADDRESS_FAMILY_IPV4
;
1763 bool needs_ipv6
= required_family
& ADDRESS_FAMILY_IPV6
;
1765 /* The operational state is within the range required for online.
1766 * If a particular address family is also required, we might revert
1767 * to offline in the blocks below. */
1768 online_state
= LINK_ONLINE_STATE_ONLINE
;
1770 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_DEGRADED
) {
1771 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1772 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1773 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_DEGRADED
)
1774 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1777 if (link
->network
->required_operstate_for_online
.min
>= LINK_OPERSTATE_ROUTABLE
) {
1778 if (needs_ipv4
&& ipv4_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1779 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1780 if (needs_ipv6
&& ipv6_address_state
< LINK_ADDRESS_STATE_ROUTABLE
)
1781 online_state
= LINK_ONLINE_STATE_OFFLINE
;
1785 if (link
->carrier_state
!= carrier_state
) {
1786 link
->carrier_state
= carrier_state
;
1788 if (strv_extend(&p
, "CarrierState") < 0)
1792 if (link
->address_state
!= address_state
) {
1793 link
->address_state
= address_state
;
1795 if (strv_extend(&p
, "AddressState") < 0)
1799 if (link
->ipv4_address_state
!= ipv4_address_state
) {
1800 link
->ipv4_address_state
= ipv4_address_state
;
1802 if (strv_extend(&p
, "IPv4AddressState") < 0)
1806 if (link
->ipv6_address_state
!= ipv6_address_state
) {
1807 link
->ipv6_address_state
= ipv6_address_state
;
1809 if (strv_extend(&p
, "IPv6AddressState") < 0)
1813 if (link
->operstate
!= operstate
) {
1814 link
->operstate
= operstate
;
1816 if (strv_extend(&p
, "OperationalState") < 0)
1820 if (link
->online_state
!= online_state
) {
1821 link
->online_state
= online_state
;
1823 if (strv_extend(&p
, "OnlineState") < 0)
1828 link_send_changed_strv(link
, p
);
1832 if (also_update_master
) {
1835 if (link_get_master(link
, &master
) >= 0)
1836 link_update_operstate(master
, true);
1840 #define FLAG_STRING(string, flag, old, new) \
1841 (((old ^ new) & flag) \
1842 ? ((old & flag) ? (" -" string) : (" +" string)) \
1845 static int link_update_flags(Link
*link
, sd_netlink_message
*message
) {
1846 bool link_was_admin_up
, had_carrier
;
1854 r
= sd_rtnl_message_link_get_flags(message
, &flags
);
1856 return log_link_debug_errno(link
, r
, "rtnl: failed to read link flags: %m");
1858 r
= sd_netlink_message_read_u8(message
, IFLA_OPERSTATE
, &operstate
);
1860 /* If we got a message without operstate, assume the state was unchanged. */
1861 operstate
= link
->kernel_operstate
;
1863 return log_link_debug_errno(link
, r
, "rtnl: failed to read operational state: %m");
1865 if (link
->flags
== flags
&& link
->kernel_operstate
== operstate
)
1868 if (link
->flags
!= flags
) {
1869 unsigned unknown_flags
, unknown_flags_added
, unknown_flags_removed
;
1871 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",
1872 FLAG_STRING("LOOPBACK", IFF_LOOPBACK
, link
->flags
, flags
),
1873 FLAG_STRING("MASTER", IFF_MASTER
, link
->flags
, flags
),
1874 FLAG_STRING("SLAVE", IFF_SLAVE
, link
->flags
, flags
),
1875 FLAG_STRING("UP", IFF_UP
, link
->flags
, flags
),
1876 FLAG_STRING("DORMANT", IFF_DORMANT
, link
->flags
, flags
),
1877 FLAG_STRING("LOWER_UP", IFF_LOWER_UP
, link
->flags
, flags
),
1878 FLAG_STRING("RUNNING", IFF_RUNNING
, link
->flags
, flags
),
1879 FLAG_STRING("MULTICAST", IFF_MULTICAST
, link
->flags
, flags
),
1880 FLAG_STRING("BROADCAST", IFF_BROADCAST
, link
->flags
, flags
),
1881 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT
, link
->flags
, flags
),
1882 FLAG_STRING("PROMISC", IFF_PROMISC
, link
->flags
, flags
),
1883 FLAG_STRING("ALLMULTI", IFF_ALLMULTI
, link
->flags
, flags
),
1884 FLAG_STRING("PORTSEL", IFF_PORTSEL
, link
->flags
, flags
),
1885 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA
, link
->flags
, flags
),
1886 FLAG_STRING("DYNAMIC", IFF_DYNAMIC
, link
->flags
, flags
),
1887 FLAG_STRING("NOARP", IFF_NOARP
, link
->flags
, flags
),
1888 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS
, link
->flags
, flags
),
1889 FLAG_STRING("DEBUG", IFF_DEBUG
, link
->flags
, flags
),
1890 FLAG_STRING("ECHO", IFF_ECHO
, link
->flags
, flags
));
1892 unknown_flags
= ~(IFF_LOOPBACK
| IFF_MASTER
| IFF_SLAVE
| IFF_UP
|
1893 IFF_DORMANT
| IFF_LOWER_UP
| IFF_RUNNING
|
1894 IFF_MULTICAST
| IFF_BROADCAST
| IFF_POINTOPOINT
|
1895 IFF_PROMISC
| IFF_ALLMULTI
| IFF_PORTSEL
|
1896 IFF_AUTOMEDIA
| IFF_DYNAMIC
| IFF_NOARP
|
1897 IFF_NOTRAILERS
| IFF_DEBUG
| IFF_ECHO
);
1898 unknown_flags_added
= ((link
->flags
^ flags
) & flags
& unknown_flags
);
1899 unknown_flags_removed
= ((link
->flags
^ flags
) & link
->flags
& unknown_flags
);
1901 if (unknown_flags_added
)
1902 log_link_debug(link
, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added
);
1904 if (unknown_flags_removed
)
1905 log_link_debug(link
, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed
);
1908 link_was_admin_up
= link
->flags
& IFF_UP
;
1909 had_carrier
= link_has_carrier(link
);
1911 link
->flags
= flags
;
1912 link
->kernel_operstate
= operstate
;
1914 link_update_operstate(link
, true);
1916 if (!link_was_admin_up
&& (link
->flags
& IFF_UP
)) {
1917 log_link_info(link
, "Link UP");
1919 r
= link_admin_state_up(link
);
1922 } else if (link_was_admin_up
&& !(link
->flags
& IFF_UP
)) {
1923 log_link_info(link
, "Link DOWN");
1925 r
= link_admin_state_down(link
);
1930 if (!had_carrier
&& link_has_carrier(link
)) {
1931 log_link_info(link
, "Gained carrier");
1933 r
= link_carrier_gained(link
);
1936 } else if (had_carrier
&& !link_has_carrier(link
)) {
1937 log_link_info(link
, "Lost carrier");
1939 r
= link_carrier_lost(link
);
1947 static int link_update_master(Link
*link
, sd_netlink_message
*message
) {
1948 int master_ifindex
, r
;
1953 r
= sd_netlink_message_read_u32(message
, IFLA_MASTER
, (uint32_t*) &master_ifindex
);
1957 return log_link_debug_errno(link
, r
, "rtnl: failed to read master ifindex: %m");
1959 if (master_ifindex
== link
->ifindex
)
1962 if (master_ifindex
== link
->master_ifindex
)
1965 if (link
->master_ifindex
== 0)
1966 log_link_debug(link
, "Attached to master interface: %i", master_ifindex
);
1967 else if (master_ifindex
== 0)
1968 log_link_debug(link
, "Detached from master interface: %i", link
->master_ifindex
);
1970 log_link_debug(link
, "Master interface changed: %i %s %i", link
->master_ifindex
,
1971 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), master_ifindex
);
1973 link_drop_from_master(link
);
1975 link
->master_ifindex
= master_ifindex
;
1977 r
= link_append_to_master(link
);
1979 return log_link_debug_errno(link
, r
, "Failed to append link to master: %m");
1984 static int link_update_driver(Link
*link
, sd_netlink_message
*message
) {
1988 assert(link
->manager
);
1991 /* Driver is already read. Assuming the driver is never changed. */
1992 if (link
->ethtool_driver_read
)
1995 /* When udevd is running, read the driver after the interface is initialized by udevd.
1996 * Otherwise, ethtool may not work correctly. See issue #22538.
1997 * When udevd is not running, read the value when the interface is detected. */
1998 if (udev_available() && !link
->dev
)
2001 link
->ethtool_driver_read
= true;
2003 r
= ethtool_get_driver(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->driver
);
2005 log_link_debug_errno(link
, r
, "Failed to get driver, continuing without: %m");
2009 log_link_debug(link
, "Found driver: %s", strna(link
->driver
));
2011 if (streq_ptr(link
->driver
, "dsa")) {
2012 uint32_t dsa_master_ifindex
= 0;
2014 r
= sd_netlink_message_read_u32(message
, IFLA_LINK
, &dsa_master_ifindex
);
2015 if (r
< 0 && r
!= -ENODATA
)
2016 return log_link_debug_errno(link
, r
, "rtnl: failed to read ifindex of the DSA master interface: %m");
2018 if (dsa_master_ifindex
> INT_MAX
) {
2019 log_link_debug(link
, "rtnl: received too large DSA master ifindex (%"PRIu32
" > INT_MAX), ignoring.",
2020 dsa_master_ifindex
);
2021 dsa_master_ifindex
= 0;
2024 link
->dsa_master_ifindex
= (int) dsa_master_ifindex
;
2027 return 1; /* needs reconfigure */
2030 static int link_update_permanent_hardware_address_from_ethtool(Link
*link
, sd_netlink_message
*message
) {
2034 assert(link
->manager
);
2037 if (link
->ethtool_permanent_hw_addr_read
)
2040 /* When udevd is running, read the permanent hardware address after the interface is
2041 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2042 * When udevd is not running, read the value when the interface is detected. */
2043 if (udev_available() && !link
->dev
)
2046 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2047 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, NULL
);
2051 return log_link_debug_errno(link
, r
, "Failed to read IFLA_ADDRESS attribute: %m");
2053 link
->ethtool_permanent_hw_addr_read
= true;
2055 r
= ethtool_get_permanent_hw_addr(&link
->manager
->ethtool_fd
, link
->ifname
, &link
->permanent_hw_addr
);
2057 log_link_debug_errno(link
, r
, "Permanent hardware address not found, continuing without: %m");
2062 static int link_update_permanent_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2066 assert(link
->manager
);
2069 if (link
->permanent_hw_addr
.length
> 0)
2072 r
= netlink_message_read_hw_addr(message
, IFLA_PERM_ADDRESS
, &link
->permanent_hw_addr
);
2075 return log_link_debug_errno(link
, r
, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2077 /* Fallback to ethtool for older kernels. */
2078 r
= link_update_permanent_hardware_address_from_ethtool(link
, message
);
2083 if (link
->permanent_hw_addr
.length
> 0)
2084 log_link_debug(link
, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link
->permanent_hw_addr
));
2086 return 1; /* needs reconfigure */
2089 static int link_update_hardware_address(Link
*link
, sd_netlink_message
*message
) {
2090 struct hw_addr_data addr
;
2096 r
= netlink_message_read_hw_addr(message
, IFLA_BROADCAST
, &link
->bcast_addr
);
2097 if (r
< 0 && r
!= -ENODATA
)
2098 return log_link_debug_errno(link
, r
, "rtnl: failed to read broadcast address: %m");
2100 r
= netlink_message_read_hw_addr(message
, IFLA_ADDRESS
, &addr
);
2104 return log_link_debug_errno(link
, r
, "rtnl: failed to read hardware address: %m");
2106 if (hw_addr_equal(&link
->hw_addr
, &addr
))
2109 if (link
->hw_addr
.length
== 0)
2110 log_link_debug(link
, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr
));
2112 log_link_debug(link
, "Hardware address is changed: %s %s %s",
2113 HW_ADDR_TO_STR(&link
->hw_addr
),
2114 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
),
2115 HW_ADDR_TO_STR(&addr
));
2117 hashmap_remove_value(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2120 link
->hw_addr
= addr
;
2122 if (!hw_addr_is_null(&link
->hw_addr
)) {
2123 r
= hashmap_ensure_put(&link
->manager
->links_by_hw_addr
, &hw_addr_hash_ops
, &link
->hw_addr
, link
);
2124 if (r
== -EEXIST
&& streq_ptr(link
->kind
, "bond"))
2125 /* bonding master and its slaves have the same hardware address. */
2126 r
= hashmap_replace(link
->manager
->links_by_hw_addr
, &link
->hw_addr
, link
);
2128 log_link_debug_errno(link
, r
, "Failed to manage link by its new hardware address, ignoring: %m");
2131 r
= ipv4ll_update_mac(link
);
2133 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4 ACD client: %m");
2135 r
= ipv4ll_update_mac(link
);
2137 return log_link_debug_errno(link
, r
, "Could not update MAC address in IPv4LL client: %m");
2139 r
= dhcp4_update_mac(link
);
2141 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCP client: %m");
2143 r
= dhcp6_update_mac(link
);
2145 return log_link_debug_errno(link
, r
, "Could not update MAC address in DHCPv6 client: %m");
2147 r
= radv_update_mac(link
);
2149 return log_link_debug_errno(link
, r
, "Could not update MAC address for Router Advertisement: %m");
2151 if (link
->ndisc
&& link
->hw_addr
.length
== ETH_ALEN
) {
2152 r
= sd_ndisc_set_mac(link
->ndisc
, &link
->hw_addr
.ether
);
2154 return log_link_debug_errno(link
, r
, "Could not update MAC for NDisc: %m");
2157 if (link
->lldp_rx
) {
2158 r
= sd_lldp_rx_set_filter_address(link
->lldp_rx
, &link
->hw_addr
.ether
);
2160 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Rx: %m");
2163 if (link
->lldp_tx
) {
2164 r
= sd_lldp_tx_set_hwaddr(link
->lldp_tx
, &link
->hw_addr
.ether
);
2166 return log_link_debug_errno(link
, r
, "Could not update MAC address for LLDP Tx: %m");
2169 return 1; /* needs reconfigure */
2172 static int link_update_mtu(Link
*link
, sd_netlink_message
*message
) {
2173 uint32_t mtu
, min_mtu
= 0, max_mtu
= UINT32_MAX
;
2179 r
= sd_netlink_message_read_u32(message
, IFLA_MTU
, &mtu
);
2183 return log_link_debug_errno(link
, r
, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2187 r
= sd_netlink_message_read_u32(message
, IFLA_MIN_MTU
, &min_mtu
);
2188 if (r
< 0 && r
!= -ENODATA
)
2189 return log_link_debug_errno(link
, r
, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2191 r
= sd_netlink_message_read_u32(message
, IFLA_MAX_MTU
, &max_mtu
);
2192 if (r
< 0 && r
!= -ENODATA
)
2193 return log_link_debug_errno(link
, r
, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2196 max_mtu
= UINT32_MAX
;
2198 link
->min_mtu
= min_mtu
;
2199 link
->max_mtu
= max_mtu
;
2201 if (link
->original_mtu
== 0) {
2202 link
->original_mtu
= mtu
;
2203 log_link_debug(link
, "Saved original MTU %" PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2204 link
->original_mtu
, link
->min_mtu
, link
->max_mtu
);
2207 if (link
->mtu
== mtu
)
2211 log_link_debug(link
, "MTU is changed: %"PRIu32
" %s %"PRIu32
" (min: %"PRIu32
", max: %"PRIu32
")",
2212 link
->mtu
, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT
), mtu
,
2213 link
->min_mtu
, link
->max_mtu
);
2217 if (link
->dhcp_client
) {
2218 r
= sd_dhcp_client_set_mtu(link
->dhcp_client
, link
->mtu
);
2220 return log_link_debug_errno(link
, r
, "Could not update MTU in DHCP client: %m");
2224 r
= sd_radv_set_mtu(link
->radv
, link
->mtu
);
2226 return log_link_debug_errno(link
, r
, "Could not set MTU for Router Advertisement: %m");
2232 static int link_update_alternative_names(Link
*link
, sd_netlink_message
*message
) {
2233 _cleanup_strv_free_
char **altnames
= NULL
;
2239 r
= sd_netlink_message_read_strv(message
, IFLA_PROP_LIST
, IFLA_ALT_IFNAME
, &altnames
);
2241 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2242 * interface has no alternative name. */
2245 return log_link_debug_errno(link
, r
, "rtnl: failed to read alternative names: %m");
2247 if (strv_equal(altnames
, link
->alternative_names
))
2250 STRV_FOREACH(n
, link
->alternative_names
)
2251 hashmap_remove(link
->manager
->links_by_name
, *n
);
2253 strv_free_and_replace(link
->alternative_names
, altnames
);
2255 STRV_FOREACH(n
, link
->alternative_names
) {
2256 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, *n
, link
);
2258 return log_link_debug_errno(link
, r
, "Failed to manage link by its new alternative names: %m");
2261 return 1; /* needs reconfigure */
2264 static int link_update_name(Link
*link
, sd_netlink_message
*message
) {
2265 char ifname_from_index
[IF_NAMESIZE
];
2272 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &ifname
);
2277 return log_link_debug_errno(link
, r
, "Failed to read interface name in RTM_NEWLINK message: %m");
2279 if (streq(ifname
, link
->ifname
))
2282 r
= format_ifname(link
->ifindex
, ifname_from_index
);
2284 return log_link_debug_errno(link
, r
, "Could not get interface name for index %i.", link
->ifindex
);
2286 if (!streq(ifname
, ifname_from_index
)) {
2287 log_link_debug(link
, "New interface name '%s' received from the kernel does not correspond "
2288 "with the name currently configured on the actual interface '%s'. Ignoring.",
2289 ifname
, ifname_from_index
);
2293 log_link_info(link
, "Interface name change detected, renamed to %s.", ifname
);
2295 hashmap_remove(link
->manager
->links_by_name
, link
->ifname
);
2297 r
= free_and_strdup(&link
->ifname
, ifname
);
2299 return log_oom_debug();
2301 r
= hashmap_ensure_put(&link
->manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2303 return log_link_debug_errno(link
, r
, "Failed to manage link by its new name: %m");
2305 if (link
->dhcp_client
) {
2306 r
= sd_dhcp_client_set_ifname(link
->dhcp_client
, link
->ifname
);
2308 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP client: %m");
2311 if (link
->dhcp6_client
) {
2312 r
= sd_dhcp6_client_set_ifname(link
->dhcp6_client
, link
->ifname
);
2314 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP6 client: %m");
2318 r
= sd_ndisc_set_ifname(link
->ndisc
, link
->ifname
);
2320 return log_link_debug_errno(link
, r
, "Failed to update interface name in NDisc: %m");
2323 if (link
->dhcp_server
) {
2324 r
= sd_dhcp_server_set_ifname(link
->dhcp_server
, link
->ifname
);
2326 return log_link_debug_errno(link
, r
, "Failed to update interface name in DHCP server: %m");
2330 r
= sd_radv_set_ifname(link
->radv
, link
->ifname
);
2332 return log_link_debug_errno(link
, r
, "Failed to update interface name in Router Advertisement: %m");
2335 if (link
->lldp_rx
) {
2336 r
= sd_lldp_rx_set_ifname(link
->lldp_rx
, link
->ifname
);
2338 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Rx: %m");
2341 if (link
->lldp_tx
) {
2342 r
= sd_lldp_tx_set_ifname(link
->lldp_tx
, link
->ifname
);
2344 return log_link_debug_errno(link
, r
, "Failed to update interface name in LLDP Tx: %m");
2348 r
= sd_ipv4ll_set_ifname(link
->ipv4ll
, link
->ifname
);
2350 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4LL client: %m");
2353 r
= ipv4acd_set_ifname(link
);
2355 return log_link_debug_errno(link
, r
, "Failed to update interface name in IPv4ACD client: %m");
2357 return 1; /* needs reconfigure */
2360 static int link_update(Link
*link
, sd_netlink_message
*message
) {
2361 bool needs_reconfigure
= false;
2367 r
= link_update_name(link
, message
);
2370 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2372 r
= link_update_alternative_names(link
, message
);
2375 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2377 r
= link_update_mtu(link
, message
);
2381 r
= link_update_driver(link
, message
);
2384 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2386 r
= link_update_permanent_hardware_address(link
, message
);
2389 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2391 r
= link_update_hardware_address(link
, message
);
2394 needs_reconfigure
= needs_reconfigure
|| r
> 0;
2396 r
= link_update_master(link
, message
);
2400 r
= link_update_ipv6ll_addrgen_mode(link
, message
);
2404 r
= link_update_flags(link
, message
);
2408 return needs_reconfigure
;
2411 static Link
*link_drop_or_unref(Link
*link
) {
2415 return link_unref(link
);
2416 return link_drop(link
);
2419 DEFINE_TRIVIAL_CLEANUP_FUNC(Link
*, link_drop_or_unref
);
2421 static int link_new(Manager
*manager
, sd_netlink_message
*message
, Link
**ret
) {
2422 _cleanup_free_
char *ifname
= NULL
, *kind
= NULL
, *state_file
= NULL
, *lease_file
= NULL
, *lldp_file
= NULL
;
2423 _cleanup_(link_drop_or_unrefp
) Link
*link
= NULL
;
2424 unsigned short iftype
;
2431 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2433 return log_debug_errno(r
, "rtnl: failed to read ifindex from link message: %m");
2434 else if (ifindex
<= 0)
2435 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "rtnl: received link message without valid ifindex.");
2437 r
= sd_rtnl_message_link_get_type(message
, &iftype
);
2439 return log_debug_errno(r
, "rtnl: failed to read interface type from link message: %m");
2441 r
= sd_netlink_message_read_string_strdup(message
, IFLA_IFNAME
, &ifname
);
2443 return log_debug_errno(r
, "rtnl: failed to read interface name from link message: %m");
2445 /* check for link kind */
2446 r
= sd_netlink_message_enter_container(message
, IFLA_LINKINFO
);
2448 r
= sd_netlink_message_read_string_strdup(message
, IFLA_INFO_KIND
, &kind
);
2449 if (r
< 0 && r
!= -ENODATA
)
2450 return log_debug_errno(r
, "rtnl: failed to read interface kind from link message: %m");
2451 r
= sd_netlink_message_exit_container(message
);
2453 return log_debug_errno(r
, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2456 if (!manager
->test_mode
) {
2457 /* Do not update state files when running in test mode. */
2458 if (asprintf(&state_file
, "/run/systemd/netif/links/%d", ifindex
) < 0)
2459 return log_oom_debug();
2461 if (asprintf(&lease_file
, "/run/systemd/netif/leases/%d", ifindex
) < 0)
2462 return log_oom_debug();
2464 if (asprintf(&lldp_file
, "/run/systemd/netif/lldp/%d", ifindex
) < 0)
2465 return log_oom_debug();
2468 link
= new(Link
, 1);
2474 .state
= LINK_STATE_PENDING
,
2475 .online_state
= _LINK_ONLINE_STATE_INVALID
,
2478 .ifname
= TAKE_PTR(ifname
),
2479 .kind
= TAKE_PTR(kind
),
2481 .ipv6ll_address_gen_mode
= _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID
,
2483 .state_file
= TAKE_PTR(state_file
),
2484 .lease_file
= TAKE_PTR(lease_file
),
2485 .lldp_file
= TAKE_PTR(lldp_file
),
2488 .dns_default_route
= -1,
2489 .llmnr
= _RESOLVE_SUPPORT_INVALID
,
2490 .mdns
= _RESOLVE_SUPPORT_INVALID
,
2491 .dnssec_mode
= _DNSSEC_MODE_INVALID
,
2492 .dns_over_tls_mode
= _DNS_OVER_TLS_MODE_INVALID
,
2495 r
= hashmap_ensure_put(&manager
->links_by_index
, NULL
, INT_TO_PTR(link
->ifindex
), link
);
2497 return log_link_debug_errno(link
, r
, "Failed to store link into manager: %m");
2499 link
->manager
= manager
;
2501 r
= hashmap_ensure_put(&manager
->links_by_name
, &string_hash_ops
, link
->ifname
, link
);
2503 return log_link_debug_errno(link
, r
, "Failed to manage link by its interface name: %m");
2505 log_link_debug(link
, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2506 link
->ifindex
, strna(arphrd_to_name(link
->iftype
)), link
->iftype
, strna(link
->kind
));
2508 *ret
= TAKE_PTR(link
);
2512 int manager_rtnl_process_link(sd_netlink
*rtnl
, sd_netlink_message
*message
, Manager
*manager
) {
2514 NetDev
*netdev
= NULL
;
2523 if (sd_netlink_message_is_error(message
)) {
2524 r
= sd_netlink_message_get_errno(message
);
2526 log_message_warning_errno(message
, r
, "rtnl: Could not receive link message, ignoring");
2531 r
= sd_netlink_message_get_type(message
, &type
);
2533 log_warning_errno(r
, "rtnl: Could not get message type, ignoring: %m");
2535 } else if (!IN_SET(type
, RTM_NEWLINK
, RTM_DELLINK
)) {
2536 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type
);
2540 r
= sd_rtnl_message_link_get_ifindex(message
, &ifindex
);
2542 log_warning_errno(r
, "rtnl: Could not get ifindex from link message, ignoring: %m");
2544 } else if (ifindex
<= 0) {
2545 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex
);
2549 r
= sd_netlink_message_read_string(message
, IFLA_IFNAME
, &name
);
2551 log_warning_errno(r
, "rtnl: Received link message without ifname, ignoring: %m");
2555 (void) link_get_by_index(manager
, ifindex
, &link
);
2556 (void) netdev_get(manager
, name
, &netdev
);
2561 /* netdev exists, so make sure the ifindex matches */
2562 r
= netdev_set_ifindex(netdev
, message
);
2564 log_netdev_warning_errno(netdev
, r
, "Could not process new link message for netdev, ignoring: %m");
2570 /* link is new, so add it */
2571 r
= link_new(manager
, message
, &link
);
2573 log_warning_errno(r
, "Could not process new link message: %m");
2577 r
= link_update(link
, message
);
2579 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2580 link_enter_failed(link
);
2584 r
= link_check_initialized(link
);
2586 log_link_warning_errno(link
, r
, "Failed to check link is initialized: %m");
2587 link_enter_failed(link
);
2591 r
= link_update(link
, message
);
2593 log_link_warning_errno(link
, r
, "Could not process link message: %m");
2594 link_enter_failed(link
);
2598 r
= link_reconfigure_impl(link
, /* force = */ false);
2600 log_link_warning_errno(link
, r
, "Failed to reconfigure interface: %m");
2601 link_enter_failed(link
);
2610 netdev_drop(netdev
);
2614 assert_not_reached();
2620 int link_getlink_handler_internal(sd_netlink
*rtnl
, sd_netlink_message
*m
, Link
*link
, const char *error_msg
) {
2621 uint16_t message_type
;
2628 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
2631 r
= sd_netlink_message_get_errno(m
);
2633 log_link_message_warning_errno(link
, m
, r
, error_msg
);
2634 link_enter_failed(link
);
2638 r
= sd_netlink_message_get_type(m
, &message_type
);
2640 log_link_debug_errno(link
, r
, "rtnl: failed to read link message type, ignoring: %m");
2643 if (message_type
!= RTM_NEWLINK
) {
2644 log_link_debug(link
, "rtnl: received invalid link message type, ignoring.");
2648 r
= link_update(link
, m
);
2650 link_enter_failed(link
);
2657 int link_call_getlink(Link
*link
, link_netlink_message_handler_t callback
) {
2658 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
2662 assert(link
->manager
);
2663 assert(link
->manager
->rtnl
);
2666 r
= sd_rtnl_message_new_link(link
->manager
->rtnl
, &req
, RTM_GETLINK
, link
->ifindex
);
2670 r
= netlink_call_async(link
->manager
->rtnl
, NULL
, req
, callback
,
2671 link_netlink_destroy_callback
, link
);
2679 static const char* const link_state_table
[_LINK_STATE_MAX
] = {
2680 [LINK_STATE_PENDING
] = "pending",
2681 [LINK_STATE_INITIALIZED
] = "initialized",
2682 [LINK_STATE_CONFIGURING
] = "configuring",
2683 [LINK_STATE_CONFIGURED
] = "configured",
2684 [LINK_STATE_UNMANAGED
] = "unmanaged",
2685 [LINK_STATE_FAILED
] = "failed",
2686 [LINK_STATE_LINGER
] = "linger",
2689 DEFINE_STRING_TABLE_LOOKUP(link_state
, LinkState
);
2691 int link_flags_to_string_alloc(uint32_t flags
, char **ret
) {
2692 _cleanup_free_
char *str
= NULL
;
2693 static const char* map
[] = {
2694 [LOG2U(IFF_UP
)] = "up", /* interface is up. */
2695 [LOG2U(IFF_BROADCAST
)] = "broadcast", /* broadcast address valid.*/
2696 [LOG2U(IFF_DEBUG
)] = "debug", /* turn on debugging. */
2697 [LOG2U(IFF_LOOPBACK
)] = "loopback", /* interface is a loopback net. */
2698 [LOG2U(IFF_POINTOPOINT
)] = "point-to-point", /* interface has p-p link. */
2699 [LOG2U(IFF_NOTRAILERS
)] = "no-trailers", /* avoid use of trailers. */
2700 [LOG2U(IFF_RUNNING
)] = "running", /* interface RFC2863 OPER_UP. */
2701 [LOG2U(IFF_NOARP
)] = "no-arp", /* no ARP protocol. */
2702 [LOG2U(IFF_PROMISC
)] = "promiscuous", /* receive all packets. */
2703 [LOG2U(IFF_ALLMULTI
)] = "all-multicast", /* receive all multicast packets. */
2704 [LOG2U(IFF_MASTER
)] = "master", /* master of a load balancer. */
2705 [LOG2U(IFF_SLAVE
)] = "slave", /* slave of a load balancer. */
2706 [LOG2U(IFF_MULTICAST
)] = "multicast", /* supports multicast.*/
2707 [LOG2U(IFF_PORTSEL
)] = "portsel", /* can set media type. */
2708 [LOG2U(IFF_AUTOMEDIA
)] = "auto-media", /* auto media select active. */
2709 [LOG2U(IFF_DYNAMIC
)] = "dynamic", /* dialup device with changing addresses. */
2710 [LOG2U(IFF_LOWER_UP
)] = "lower-up", /* driver signals L1 up. */
2711 [LOG2U(IFF_DORMANT
)] = "dormant", /* driver signals dormant. */
2712 [LOG2U(IFF_ECHO
)] = "echo", /* echo sent packets. */
2717 for (size_t i
= 0; i
< ELEMENTSOF(map
); i
++)
2718 if (FLAGS_SET(flags
, 1 << i
) && map
[i
])
2719 if (!strextend_with_separator(&str
, ",", map
[i
]))
2722 *ret
= TAKE_PTR(str
);
2726 static const char * const kernel_operstate_table
[] = {
2727 [IF_OPER_UNKNOWN
] = "unknown",
2728 [IF_OPER_NOTPRESENT
] = "not-present",
2729 [IF_OPER_DOWN
] = "down",
2730 [IF_OPER_LOWERLAYERDOWN
] = "lower-layer-down",
2731 [IF_OPER_TESTING
] = "testing",
2732 [IF_OPER_DORMANT
] = "dormant",
2733 [IF_OPER_UP
] = "up",
2736 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate
, int);