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Merge pull request #30321 from yuwata/find-esp
[thirdparty/systemd.git] / src / network / networkd-link.c
1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include <net/if.h>
4 #include <netinet/in.h>
5 #include <linux/if.h>
6 #include <linux/if_arp.h>
7 #include <linux/if_link.h>
8 #include <linux/netdevice.h>
9 #include <sys/socket.h>
10 #include <unistd.h>
11
12 #include "alloc-util.h"
13 #include "arphrd-util.h"
14 #include "batadv.h"
15 #include "bond.h"
16 #include "bridge.h"
17 #include "bus-util.h"
18 #include "device-private.h"
19 #include "device-util.h"
20 #include "dhcp-identifier.h"
21 #include "dhcp-lease-internal.h"
22 #include "env-file.h"
23 #include "ethtool-util.h"
24 #include "event-util.h"
25 #include "fd-util.h"
26 #include "fileio.h"
27 #include "format-util.h"
28 #include "fs-util.h"
29 #include "glyph-util.h"
30 #include "logarithm.h"
31 #include "missing_network.h"
32 #include "netlink-util.h"
33 #include "network-internal.h"
34 #include "networkd-address-label.h"
35 #include "networkd-address.h"
36 #include "networkd-bridge-fdb.h"
37 #include "networkd-bridge-mdb.h"
38 #include "networkd-bridge-vlan.h"
39 #include "networkd-can.h"
40 #include "networkd-dhcp-prefix-delegation.h"
41 #include "networkd-dhcp-server.h"
42 #include "networkd-dhcp4.h"
43 #include "networkd-dhcp6.h"
44 #include "networkd-ipv4acd.h"
45 #include "networkd-ipv4ll.h"
46 #include "networkd-ipv6-proxy-ndp.h"
47 #include "networkd-link-bus.h"
48 #include "networkd-link.h"
49 #include "networkd-lldp-tx.h"
50 #include "networkd-manager.h"
51 #include "networkd-ndisc.h"
52 #include "networkd-neighbor.h"
53 #include "networkd-nexthop.h"
54 #include "networkd-queue.h"
55 #include "networkd-radv.h"
56 #include "networkd-route-util.h"
57 #include "networkd-route.h"
58 #include "networkd-routing-policy-rule.h"
59 #include "networkd-setlink.h"
60 #include "networkd-sriov.h"
61 #include "networkd-state-file.h"
62 #include "networkd-sysctl.h"
63 #include "networkd-wifi.h"
64 #include "set.h"
65 #include "socket-util.h"
66 #include "stdio-util.h"
67 #include "string-table.h"
68 #include "strv.h"
69 #include "tc.h"
70 #include "tmpfile-util.h"
71 #include "tuntap.h"
72 #include "udev-util.h"
73 #include "vrf.h"
74
75 bool link_ipv6_enabled(Link *link) {
76 assert(link);
77
78 if (!socket_ipv6_is_supported())
79 return false;
80
81 if (link->iftype == ARPHRD_CAN)
82 return false;
83
84 if (!link->network)
85 return false;
86
87 if (link->network->bond)
88 return false;
89
90 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
91 return true;
92
93 if (network_has_static_ipv6_configurations(link->network))
94 return true;
95
96 return false;
97 }
98
99 bool link_has_ipv6_connectivity(Link *link) {
100 LinkAddressState ipv6_address_state;
101
102 assert(link);
103
104 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
105
106 switch (ipv6_address_state) {
107 case LINK_ADDRESS_STATE_ROUTABLE:
108 /* If the interface has a routable IPv6 address, then we assume yes. */
109 return true;
110
111 case LINK_ADDRESS_STATE_DEGRADED:
112 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
113 * there is an IPv6 default gateway. */
114 return link_has_default_gateway(link, AF_INET6);
115
116 case LINK_ADDRESS_STATE_OFF:
117 /* No IPv6 address. */
118 return false;
119
120 default:
121 assert_not_reached();
122 }
123 }
124
125 static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
126 assert(link);
127
128 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
129 return false;
130
131 if (!link->network)
132 return allow_unmanaged;
133
134 if (!link->network->configure_without_carrier) {
135 if (link->set_flags_messages > 0)
136 return false;
137
138 if (!link_has_carrier(link))
139 return false;
140 }
141
142 if (link->set_link_messages > 0)
143 return false;
144
145 if (!link->activated)
146 return false;
147
148 return true;
149 }
150
151 bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
152 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
153 }
154
155 void link_ntp_settings_clear(Link *link) {
156 link->ntp = strv_free(link->ntp);
157 }
158
159 void link_dns_settings_clear(Link *link) {
160 if (link->n_dns != UINT_MAX)
161 for (unsigned i = 0; i < link->n_dns; i++)
162 in_addr_full_free(link->dns[i]);
163 link->dns = mfree(link->dns);
164 link->n_dns = UINT_MAX;
165
166 link->search_domains = ordered_set_free(link->search_domains);
167 link->route_domains = ordered_set_free(link->route_domains);
168
169 link->dns_default_route = -1;
170 link->llmnr = _RESOLVE_SUPPORT_INVALID;
171 link->mdns = _RESOLVE_SUPPORT_INVALID;
172 link->dnssec_mode = _DNSSEC_MODE_INVALID;
173 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
174
175 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
176 }
177
178 static void link_free_engines(Link *link) {
179 if (!link)
180 return;
181
182 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
183
184 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
185 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
186 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
187
188 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
189 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
190
191 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
192
193 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
194
195 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
196 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
197
198 link->ndisc = sd_ndisc_unref(link->ndisc);
199 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
200 ndisc_flush(link);
201
202 link->radv = sd_radv_unref(link->radv);
203 }
204
205 static Link *link_free(Link *link) {
206 assert(link);
207
208 link_ntp_settings_clear(link);
209 link_dns_settings_clear(link);
210
211 link->routes = set_free(link->routes);
212 link->neighbors = set_free(link->neighbors);
213 link->addresses = set_free(link->addresses);
214 link->qdiscs = set_free(link->qdiscs);
215 link->tclasses = set_free(link->tclasses);
216
217 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
218
219 link_free_engines(link);
220
221 set_free(link->sr_iov_virt_port_ifindices);
222 free(link->ifname);
223 strv_free(link->alternative_names);
224 free(link->kind);
225 free(link->ssid);
226 free(link->previous_ssid);
227 free(link->driver);
228
229 unlink_and_free(link->lease_file);
230 unlink_and_free(link->lldp_file);
231 unlink_and_free(link->state_file);
232
233 sd_device_unref(link->dev);
234 netdev_unref(link->netdev);
235
236 hashmap_free(link->bound_to_links);
237 hashmap_free(link->bound_by_links);
238
239 set_free_with_destructor(link->slaves, link_unref);
240
241 network_unref(link->network);
242
243 sd_event_source_disable_unref(link->carrier_lost_timer);
244
245 return mfree(link);
246 }
247
248 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
249
250 int link_get_by_index(Manager *m, int ifindex, Link **ret) {
251 Link *link;
252
253 assert(m);
254
255 if (ifindex <= 0)
256 return -EINVAL;
257
258 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
259 if (!link)
260 return -ENODEV;
261
262 if (ret)
263 *ret = link;
264 return 0;
265 }
266
267 int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
268 Link *link;
269
270 assert(m);
271 assert(ifname);
272
273 link = hashmap_get(m->links_by_name, ifname);
274 if (!link)
275 return -ENODEV;
276
277 if (ret)
278 *ret = link;
279 return 0;
280 }
281
282 int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
283 Link *link;
284
285 assert(m);
286 assert(hw_addr);
287
288 link = hashmap_get(m->links_by_hw_addr, hw_addr);
289 if (!link)
290 return -ENODEV;
291
292 if (ret)
293 *ret = link;
294 return 0;
295 }
296
297 int link_get_master(Link *link, Link **ret) {
298 assert(link);
299 assert(link->manager);
300 assert(ret);
301
302 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
303 return -ENODEV;
304
305 return link_get_by_index(link->manager, link->master_ifindex, ret);
306 }
307
308 void link_set_state(Link *link, LinkState state) {
309 assert(link);
310
311 if (link->state == state)
312 return;
313
314 log_link_debug(link, "State changed: %s -> %s",
315 link_state_to_string(link->state),
316 link_state_to_string(state));
317
318 link->state = state;
319
320 link_send_changed(link, "AdministrativeState", NULL);
321 link_dirty(link);
322 }
323
324 int link_stop_engines(Link *link, bool may_keep_dhcp) {
325 int r = 0, k;
326
327 assert(link);
328 assert(link->manager);
329 assert(link->manager->event);
330
331 bool keep_dhcp = may_keep_dhcp &&
332 link->network &&
333 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
334 (link->manager->restarting ||
335 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
336
337 if (!keep_dhcp) {
338 k = sd_dhcp_client_stop(link->dhcp_client);
339 if (k < 0)
340 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
341 }
342
343 k = sd_dhcp_server_stop(link->dhcp_server);
344 if (k < 0)
345 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
346
347 k = sd_lldp_rx_stop(link->lldp_rx);
348 if (k < 0)
349 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
350
351 k = sd_lldp_tx_stop(link->lldp_tx);
352 if (k < 0)
353 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
354
355 k = sd_ipv4ll_stop(link->ipv4ll);
356 if (k < 0)
357 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
358
359 k = ipv4acd_stop(link);
360 if (k < 0)
361 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
362
363 k = sd_dhcp6_client_stop(link->dhcp6_client);
364 if (k < 0)
365 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
366
367 k = dhcp_pd_remove(link, /* only_marked = */ false);
368 if (k < 0)
369 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
370
371 k = ndisc_stop(link);
372 if (k < 0)
373 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
374
375 ndisc_flush(link);
376
377 k = sd_radv_stop(link->radv);
378 if (k < 0)
379 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
380
381 return r;
382 }
383
384 void link_enter_failed(Link *link) {
385 assert(link);
386
387 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
388 return;
389
390 log_link_warning(link, "Failed");
391
392 link_set_state(link, LINK_STATE_FAILED);
393
394 (void) link_stop_engines(link, false);
395 }
396
397 void link_check_ready(Link *link) {
398 Address *a;
399
400 assert(link);
401
402 if (link->state == LINK_STATE_CONFIGURED)
403 return;
404
405 if (link->state != LINK_STATE_CONFIGURING)
406 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
407
408 if (!link->network)
409 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
410
411 if (!link->tc_configured)
412 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
413
414 if (link->set_link_messages > 0)
415 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
416
417 if (!link->activated)
418 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
419
420 if (link->iftype == ARPHRD_CAN) {
421 /* let's shortcut things for CAN which doesn't need most of checks below. */
422 link_set_state(link, LINK_STATE_CONFIGURED);
423 return;
424 }
425
426 if (!link->stacked_netdevs_created)
427 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
428
429 if (!link->static_addresses_configured)
430 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
431
432 if (!link->static_address_labels_configured)
433 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
434
435 if (!link->static_bridge_fdb_configured)
436 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
437
438 if (!link->static_bridge_mdb_configured)
439 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
440
441 if (!link->static_ipv6_proxy_ndp_configured)
442 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
443
444 if (!link->static_neighbors_configured)
445 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
446
447 if (!link->static_nexthops_configured)
448 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
449
450 if (!link->static_routes_configured)
451 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
452
453 if (!link->static_routing_policy_rules_configured)
454 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
455
456 if (!link->sr_iov_configured)
457 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
458
459 /* IPv6LL is assigned after the link gains its carrier. */
460 if (!link->network->configure_without_carrier &&
461 link_ipv6ll_enabled(link) &&
462 !in6_addr_is_set(&link->ipv6ll_address))
463 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
464
465 /* All static addresses must be ready. */
466 bool has_static_address = false;
467 SET_FOREACH(a, link->addresses) {
468 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
469 continue;
470 if (!address_is_ready(a))
471 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
472 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
473 has_static_address = true;
474 }
475
476 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
477 if (has_static_address)
478 goto ready;
479
480 /* If no dynamic addressing protocol enabled, assume the interface is ready.
481 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
482 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
483 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
484 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
485 goto ready;
486
487 bool ipv4ll_ready =
488 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
489 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
490 bool dhcp4_ready =
491 link_dhcp4_enabled(link) && link->dhcp4_configured &&
492 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
493 bool dhcp6_ready =
494 link_dhcp6_enabled(link) && link->dhcp6_configured &&
495 (!link->network->dhcp6_use_address ||
496 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
497 bool dhcp_pd_ready =
498 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
499 (!link->network->dhcp_pd_assign ||
500 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
501 bool ndisc_ready =
502 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
503 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
504 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
505
506 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
507 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
508 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
509 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
510 if (!dhcp4_ready)
511 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
512 if (!dhcp_pd_ready)
513 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
514 }
515
516 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
517 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
518 if (!dhcp6_ready)
519 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
520 if (!dhcp_pd_ready)
521 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
522 }
523 }
524
525 /* At least one dynamic addressing protocol is finished. */
526 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
527 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
528
529 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
530 __func__,
531 yes_no(ipv4ll_ready),
532 yes_no(dhcp4_ready),
533 yes_no(dhcp6_ready),
534 yes_no(dhcp_pd_ready),
535 yes_no(ndisc_ready));
536
537 ready:
538 link_set_state(link, LINK_STATE_CONFIGURED);
539 }
540
541 static int link_request_static_configs(Link *link) {
542 int r;
543
544 assert(link);
545 assert(link->network);
546 assert(link->state != _LINK_STATE_INVALID);
547
548 r = link_request_static_addresses(link);
549 if (r < 0)
550 return r;
551
552 r = link_request_static_address_labels(link);
553 if (r < 0)
554 return r;
555
556 r = link_request_static_bridge_fdb(link);
557 if (r < 0)
558 return r;
559
560 r = link_request_static_bridge_mdb(link);
561 if (r < 0)
562 return r;
563
564 r = link_request_static_ipv6_proxy_ndp_addresses(link);
565 if (r < 0)
566 return r;
567
568 r = link_request_static_neighbors(link);
569 if (r < 0)
570 return r;
571
572 r = link_request_static_nexthops(link, false);
573 if (r < 0)
574 return r;
575
576 r = link_request_static_routes(link, false);
577 if (r < 0)
578 return r;
579
580 r = link_request_static_routing_policy_rules(link);
581 if (r < 0)
582 return r;
583
584 return 0;
585 }
586
587 static int link_request_stacked_netdevs(Link *link) {
588 NetDev *netdev;
589 int r;
590
591 assert(link);
592
593 link->stacked_netdevs_created = false;
594
595 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
596 r = link_request_stacked_netdev(link, netdev);
597 if (r < 0)
598 return r;
599 }
600
601 if (link->create_stacked_netdev_messages == 0) {
602 link->stacked_netdevs_created = true;
603 link_check_ready(link);
604 }
605
606 return 0;
607 }
608
609 static int link_acquire_dynamic_ipv6_conf(Link *link) {
610 int r;
611
612 assert(link);
613
614 r = radv_start(link);
615 if (r < 0)
616 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
617
618 r = ndisc_start(link);
619 if (r < 0)
620 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
621
622 r = dhcp6_start(link);
623 if (r < 0)
624 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
625
626 return 0;
627 }
628
629 static int link_acquire_dynamic_ipv4_conf(Link *link) {
630 int r;
631
632 assert(link);
633 assert(link->manager);
634 assert(link->manager->event);
635
636 if (link->dhcp_client) {
637 r = dhcp4_start(link);
638 if (r < 0)
639 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
640
641 log_link_debug(link, "Acquiring DHCPv4 lease.");
642
643 } else if (link->ipv4ll) {
644 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
645 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
646 if (r < 0)
647 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
648 }
649
650 r = sd_ipv4ll_start(link->ipv4ll);
651 if (r < 0)
652 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
653
654 log_link_debug(link, "Acquiring IPv4 link-local address.");
655 }
656
657 if (link->dhcp_server) {
658 r = sd_dhcp_server_start(link->dhcp_server);
659 if (r < 0)
660 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
661 }
662
663 r = ipv4acd_start(link);
664 if (r < 0)
665 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
666
667 return 0;
668 }
669
670 static int link_acquire_dynamic_conf(Link *link) {
671 int r;
672
673 assert(link);
674 assert(link->network);
675
676 r = link_acquire_dynamic_ipv4_conf(link);
677 if (r < 0)
678 return r;
679
680 if (in6_addr_is_set(&link->ipv6ll_address)) {
681 r = link_acquire_dynamic_ipv6_conf(link);
682 if (r < 0)
683 return r;
684 }
685
686 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
687 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
688 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
689 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
690 * below will be called in radv_start(). */
691 r = dhcp_request_prefix_delegation(link);
692 if (r < 0)
693 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
694 }
695
696 if (link->lldp_tx) {
697 r = sd_lldp_tx_start(link->lldp_tx);
698 if (r < 0)
699 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
700 }
701
702 if (link->lldp_rx) {
703 r = sd_lldp_rx_start(link->lldp_rx);
704 if (r < 0)
705 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
706 }
707
708 return 0;
709 }
710
711 int link_ipv6ll_gained(Link *link) {
712 int r;
713
714 assert(link);
715
716 log_link_info(link, "Gained IPv6LL");
717
718 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
719 return 0;
720
721 r = link_acquire_dynamic_ipv6_conf(link);
722 if (r < 0)
723 return r;
724
725 link_check_ready(link);
726 return 0;
727 }
728
729 int link_handle_bound_to_list(Link *link) {
730 bool required_up = false;
731 bool link_is_up = false;
732 Link *l;
733
734 assert(link);
735
736 /* If at least one interface in bound_to_links has carrier, then make this interface up.
737 * If all interfaces in bound_to_links do not, then make this interface down. */
738
739 if (hashmap_isempty(link->bound_to_links))
740 return 0;
741
742 if (link->flags & IFF_UP)
743 link_is_up = true;
744
745 HASHMAP_FOREACH(l, link->bound_to_links)
746 if (link_has_carrier(l)) {
747 required_up = true;
748 break;
749 }
750
751 if (!required_up && link_is_up)
752 return link_request_to_bring_up_or_down(link, /* up = */ false);
753 if (required_up && !link_is_up)
754 return link_request_to_bring_up_or_down(link, /* up = */ true);
755
756 return 0;
757 }
758
759 static int link_handle_bound_by_list(Link *link) {
760 Link *l;
761 int r;
762
763 assert(link);
764
765 /* Update up or down state of interfaces which depend on this interface's carrier state. */
766
767 if (hashmap_isempty(link->bound_by_links))
768 return 0;
769
770 HASHMAP_FOREACH(l, link->bound_by_links) {
771 r = link_handle_bound_to_list(l);
772 if (r < 0)
773 return r;
774 }
775
776 return 0;
777 }
778
779 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
780 int r;
781
782 assert(link);
783 assert(carrier);
784
785 if (link == carrier)
786 return 0;
787
788 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
789 return 0;
790
791 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
792 if (r < 0)
793 return r;
794
795 link_dirty(link);
796
797 return 0;
798 }
799
800 static int link_new_bound_by_list(Link *link) {
801 Manager *m;
802 Link *carrier;
803 int r;
804
805 assert(link);
806 assert(link->manager);
807
808 m = link->manager;
809
810 HASHMAP_FOREACH(carrier, m->links_by_index) {
811 if (!carrier->network)
812 continue;
813
814 if (strv_isempty(carrier->network->bind_carrier))
815 continue;
816
817 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
818 r = link_put_carrier(link, carrier, &link->bound_by_links);
819 if (r < 0)
820 return r;
821 }
822 }
823
824 HASHMAP_FOREACH(carrier, link->bound_by_links) {
825 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
826 if (r < 0)
827 return r;
828 }
829
830 return 0;
831 }
832
833 static int link_new_bound_to_list(Link *link) {
834 Manager *m;
835 Link *carrier;
836 int r;
837
838 assert(link);
839 assert(link->manager);
840
841 if (!link->network)
842 return 0;
843
844 if (strv_isempty(link->network->bind_carrier))
845 return 0;
846
847 m = link->manager;
848
849 HASHMAP_FOREACH(carrier, m->links_by_index) {
850 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
851 r = link_put_carrier(link, carrier, &link->bound_to_links);
852 if (r < 0)
853 return r;
854 }
855 }
856
857 HASHMAP_FOREACH(carrier, link->bound_to_links) {
858 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
859 if (r < 0)
860 return r;
861 }
862
863 return 0;
864 }
865
866 static void link_free_bound_to_list(Link *link) {
867 bool updated = false;
868 Link *bound_to;
869
870 assert(link);
871
872 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
873 updated = true;
874
875 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
876 link_dirty(bound_to);
877 }
878
879 if (updated)
880 link_dirty(link);
881 }
882
883 static void link_free_bound_by_list(Link *link) {
884 bool updated = false;
885 Link *bound_by;
886
887 assert(link);
888
889 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
890 updated = true;
891
892 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
893 link_dirty(bound_by);
894 link_handle_bound_to_list(bound_by);
895 }
896 }
897
898 if (updated)
899 link_dirty(link);
900 }
901
902 static int link_append_to_master(Link *link) {
903 Link *master;
904 int r;
905
906 assert(link);
907
908 /* - The link may have no master.
909 * - RTM_NEWLINK message about master interface may not be received yet. */
910 if (link_get_master(link, &master) < 0)
911 return 0;
912
913 r = set_ensure_put(&master->slaves, NULL, link);
914 if (r <= 0)
915 return r;
916
917 link_ref(link);
918 return 0;
919 }
920
921 static void link_drop_from_master(Link *link) {
922 Link *master;
923
924 assert(link);
925
926 if (!link->manager)
927 return;
928
929 if (link_get_master(link, &master) < 0)
930 return;
931
932 link_unref(set_remove(master->slaves, link));
933 }
934
935 static void link_drop_requests(Link *link) {
936 Request *req;
937
938 assert(link);
939 assert(link->manager);
940
941 ORDERED_SET_FOREACH(req, link->manager->request_queue)
942 if (req->link == link)
943 request_detach(link->manager, req);
944 }
945
946 static Link *link_drop(Link *link) {
947 if (!link)
948 return NULL;
949
950 assert(link->manager);
951
952 link_set_state(link, LINK_STATE_LINGER);
953
954 /* Drop all references from other links and manager. Note that async netlink calls may have
955 * references to the link, and they will be dropped when we receive replies. */
956
957 link_drop_requests(link);
958
959 link_free_bound_to_list(link);
960 link_free_bound_by_list(link);
961
962 link_clear_sr_iov_ifindices(link);
963
964 link_drop_from_master(link);
965
966 if (link->state_file)
967 (void) unlink(link->state_file);
968
969 link_clean(link);
970
971 STRV_FOREACH(n, link->alternative_names)
972 hashmap_remove(link->manager->links_by_name, *n);
973 hashmap_remove(link->manager->links_by_name, link->ifname);
974
975 /* bonding master and its slaves have the same hardware address. */
976 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
977
978 /* The following must be called at last. */
979 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
980 return link_unref(link);
981 }
982
983 static int link_drop_foreign_config(Link *link) {
984 int r;
985
986 assert(link);
987 assert(link->manager);
988
989 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
990 * to remove loopback address or addresses used for root NFS. */
991
992 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
993 return 0;
994 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
995 return 0;
996 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
997 return 0;
998
999 r = link_drop_foreign_routes(link);
1000
1001 RET_GATHER(r, link_drop_foreign_nexthops(link));
1002 RET_GATHER(r, link_drop_foreign_addresses(link));
1003 RET_GATHER(r, link_drop_foreign_neighbors(link));
1004 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
1005
1006 return r;
1007 }
1008
1009 static int link_drop_managed_config(Link *link) {
1010 int r;
1011
1012 assert(link);
1013 assert(link->manager);
1014
1015 r = link_drop_managed_routes(link);
1016
1017 RET_GATHER(r, link_drop_managed_nexthops(link));
1018 RET_GATHER(r, link_drop_managed_addresses(link));
1019 RET_GATHER(r, link_drop_managed_neighbors(link));
1020 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
1021
1022 return r;
1023 }
1024
1025 static void link_foreignize_config(Link *link) {
1026 assert(link);
1027 assert(link->manager);
1028
1029 link_foreignize_routes(link);
1030 link_foreignize_nexthops(link);
1031 link_foreignize_addresses(link);
1032 link_foreignize_neighbors(link);
1033 link_foreignize_routing_policy_rules(link);
1034 }
1035
1036 static int link_configure(Link *link) {
1037 int r;
1038
1039 assert(link);
1040 assert(link->network);
1041 assert(link->state == LINK_STATE_INITIALIZED);
1042
1043 link_set_state(link, LINK_STATE_CONFIGURING);
1044
1045 r = link_new_bound_to_list(link);
1046 if (r < 0)
1047 return r;
1048
1049 r = link_request_traffic_control(link);
1050 if (r < 0)
1051 return r;
1052
1053 r = link_configure_mtu(link);
1054 if (r < 0)
1055 return r;
1056
1057 if (link->iftype == ARPHRD_CAN) {
1058 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1059 r = link_request_to_set_can(link);
1060 if (r < 0)
1061 return r;
1062
1063 return link_request_to_activate(link);
1064 }
1065
1066 r = link_request_sr_iov_vfs(link);
1067 if (r < 0)
1068 return r;
1069
1070 r = link_set_sysctl(link);
1071 if (r < 0)
1072 return r;
1073
1074 r = link_request_to_set_mac(link, /* allow_retry = */ true);
1075 if (r < 0)
1076 return r;
1077
1078 r = link_request_to_set_ipoib(link);
1079 if (r < 0)
1080 return r;
1081
1082 r = link_request_to_set_flags(link);
1083 if (r < 0)
1084 return r;
1085
1086 r = link_request_to_set_group(link);
1087 if (r < 0)
1088 return r;
1089
1090 r = link_request_to_set_addrgen_mode(link);
1091 if (r < 0)
1092 return r;
1093
1094 r = link_request_to_set_master(link);
1095 if (r < 0)
1096 return r;
1097
1098 r = link_request_stacked_netdevs(link);
1099 if (r < 0)
1100 return r;
1101
1102 r = link_request_to_set_bond(link);
1103 if (r < 0)
1104 return r;
1105
1106 r = link_request_to_set_bridge(link);
1107 if (r < 0)
1108 return r;
1109
1110 r = link_request_to_set_bridge_vlan(link);
1111 if (r < 0)
1112 return r;
1113
1114 r = link_request_to_activate(link);
1115 if (r < 0)
1116 return r;
1117
1118 r = ipv4ll_configure(link);
1119 if (r < 0)
1120 return r;
1121
1122 r = link_request_dhcp4_client(link);
1123 if (r < 0)
1124 return r;
1125
1126 r = link_request_dhcp6_client(link);
1127 if (r < 0)
1128 return r;
1129
1130 r = link_request_ndisc(link);
1131 if (r < 0)
1132 return r;
1133
1134 r = link_request_dhcp_server(link);
1135 if (r < 0)
1136 return r;
1137
1138 r = link_request_radv(link);
1139 if (r < 0)
1140 return r;
1141
1142 r = link_lldp_rx_configure(link);
1143 if (r < 0)
1144 return r;
1145
1146 r = link_lldp_tx_configure(link);
1147 if (r < 0)
1148 return r;
1149
1150 r = link_drop_foreign_config(link);
1151 if (r < 0)
1152 return r;
1153
1154 r = link_request_static_configs(link);
1155 if (r < 0)
1156 return r;
1157
1158 if (!link_has_carrier(link))
1159 return 0;
1160
1161 return link_acquire_dynamic_conf(link);
1162 }
1163
1164 static int link_get_network(Link *link, Network **ret) {
1165 Network *network;
1166 int r;
1167
1168 assert(link);
1169 assert(link->manager);
1170 assert(ret);
1171
1172 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1173 bool warn = false;
1174
1175 r = net_match_config(
1176 &network->match,
1177 link->dev,
1178 &link->hw_addr,
1179 &link->permanent_hw_addr,
1180 link->driver,
1181 link->iftype,
1182 link->kind,
1183 link->ifname,
1184 link->alternative_names,
1185 link->wlan_iftype,
1186 link->ssid,
1187 &link->bssid);
1188 if (r < 0)
1189 return r;
1190 if (r == 0)
1191 continue;
1192
1193 if (network->match.ifname && link->dev) {
1194 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1195 const char *attr;
1196
1197 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
1198 (void) safe_atou8(attr, &name_assign_type);
1199
1200 warn = name_assign_type == NET_NAME_ENUM;
1201 }
1202
1203 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1204 "found matching network '%s'%s.",
1205 network->filename,
1206 warn ? ", based on potentially unpredictable interface name" : "");
1207
1208 if (network->unmanaged)
1209 return -ENOENT;
1210
1211 *ret = network;
1212 return 0;
1213 }
1214
1215 return -ENOENT;
1216 }
1217
1218 int link_reconfigure_impl(Link *link, bool force) {
1219 Network *network = NULL;
1220 NetDev *netdev = NULL;
1221 int r;
1222
1223 assert(link);
1224
1225 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
1226 return 0;
1227
1228 r = netdev_get(link->manager, link->ifname, &netdev);
1229 if (r < 0 && r != -ENOENT)
1230 return r;
1231
1232 r = link_get_network(link, &network);
1233 if (r < 0 && r != -ENOENT)
1234 return r;
1235
1236 if (link->state != LINK_STATE_UNMANAGED && !network)
1237 /* If link is in initialized state, then link->network is also NULL. */
1238 force = true;
1239
1240 if (link->network == network && !force)
1241 return 0;
1242
1243 if (network) {
1244 if (link->state == LINK_STATE_INITIALIZED)
1245 log_link_info(link, "Configuring with %s.", network->filename);
1246 else
1247 log_link_info(link, "Reconfiguring with %s.", network->filename);
1248 } else
1249 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1250 "Unmanaging interface.");
1251
1252 /* Dropping old .network file */
1253 r = link_stop_engines(link, false);
1254 if (r < 0)
1255 return r;
1256
1257 link_drop_requests(link);
1258
1259 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
1260 /* When a new/updated .network file is assigned, first make all configs (addresses,
1261 * routes, and so on) foreign, and then drop unnecessary configs later by
1262 * link_drop_foreign_config() in link_configure().
1263 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1264 * here we need to drop the configs such as addresses, routes, and so on configured by
1265 * the previously assigned .network file. */
1266 link_foreignize_config(link);
1267 else {
1268 /* Remove all managed configs. Note, foreign configs are removed in later by
1269 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1270 r = link_drop_managed_config(link);
1271 if (r < 0)
1272 return r;
1273 }
1274
1275 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1276 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1277 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1278 * map here, as it depends on .network files assigned to other links. */
1279 link_free_bound_to_list(link);
1280
1281 link_free_engines(link);
1282 link->network = network_unref(link->network);
1283
1284 netdev_unref(link->netdev);
1285 link->netdev = netdev_ref(netdev);
1286
1287 if (!network) {
1288 link_set_state(link, LINK_STATE_UNMANAGED);
1289 return 0;
1290 }
1291
1292 /* Then, apply new .network file */
1293 link->network = network_ref(network);
1294 link_update_operstate(link, true);
1295 link_dirty(link);
1296
1297 link_set_state(link, LINK_STATE_INITIALIZED);
1298 link->activated = false;
1299
1300 r = link_configure(link);
1301 if (r < 0)
1302 return r;
1303
1304 return 1;
1305 }
1306
1307 static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
1308 int r;
1309
1310 assert(link);
1311
1312 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1313 if (r <= 0)
1314 return r;
1315
1316 r = link_reconfigure_impl(link, force);
1317 if (r < 0) {
1318 link_enter_failed(link);
1319 return 0;
1320 }
1321
1322 return r;
1323 }
1324
1325 static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1326 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
1327 }
1328
1329 static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1330 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
1331 }
1332
1333 int link_reconfigure(Link *link, bool force) {
1334 int r;
1335
1336 assert(link);
1337
1338 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1339 * the function from being called multiple times simultaneously, refuse to reconfigure the
1340 * interface in these cases. */
1341 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
1342 return 0; /* 0 means no-op. */
1343
1344 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
1345 if (r < 0)
1346 return r;
1347
1348 return 1; /* 1 means the interface will be reconfigured. */
1349 }
1350
1351 static int link_initialized_and_synced(Link *link) {
1352 int r;
1353
1354 assert(link);
1355 assert(link->manager);
1356
1357 if (link->manager->test_mode) {
1358 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1359 link_set_state(link, LINK_STATE_UNMANAGED);
1360 return 0;
1361 }
1362
1363 if (link->state == LINK_STATE_PENDING) {
1364 log_link_debug(link, "Link state is up-to-date");
1365 link_set_state(link, LINK_STATE_INITIALIZED);
1366
1367 r = link_new_bound_by_list(link);
1368 if (r < 0)
1369 return r;
1370
1371 r = link_handle_bound_by_list(link);
1372 if (r < 0)
1373 return r;
1374 }
1375
1376 return link_reconfigure_impl(link, /* force = */ false);
1377 }
1378
1379 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1380 int r;
1381
1382 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1383 if (r <= 0)
1384 return r;
1385
1386 r = link_initialized_and_synced(link);
1387 if (r < 0)
1388 link_enter_failed(link);
1389
1390 return 0;
1391 }
1392
1393 static int link_initialized(Link *link, sd_device *device) {
1394 int r;
1395
1396 assert(link);
1397 assert(device);
1398
1399 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1400 * or sysattrs) may be outdated. */
1401 device_unref_and_replace(link->dev, device);
1402
1403 if (link->dhcp_client) {
1404 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1405 if (r < 0)
1406 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1407 }
1408
1409 if (link->dhcp6_client) {
1410 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1411 if (r < 0)
1412 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1413 }
1414
1415 r = link_set_sr_iov_ifindices(link);
1416 if (r < 0)
1417 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1418
1419 if (link->state != LINK_STATE_PENDING)
1420 return link_reconfigure(link, /* force = */ false);
1421
1422 log_link_debug(link, "udev initialized link");
1423
1424 /* udev has initialized the link, but we don't know if we have yet
1425 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1426 * when it returns we know that the pending NEWLINKs have already been
1427 * processed and that we are up-to-date */
1428
1429 return link_call_getlink(link, link_initialized_handler);
1430 }
1431
1432 static int link_check_initialized(Link *link) {
1433 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
1434 int r;
1435
1436 assert(link);
1437
1438 if (!udev_available())
1439 return link_initialized_and_synced(link);
1440
1441 /* udev should be around */
1442 r = sd_device_new_from_ifindex(&device, link->ifindex);
1443 if (r < 0) {
1444 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1445 return 0;
1446 }
1447
1448 r = sd_device_get_is_initialized(device);
1449 if (r < 0)
1450 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
1451 if (r == 0) {
1452 /* not yet ready */
1453 log_link_debug(link, "link pending udev initialization...");
1454 return 0;
1455 }
1456
1457 r = device_is_renaming(device);
1458 if (r < 0)
1459 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
1460 if (r > 0) {
1461 log_link_debug(link, "Interface is being renamed, pending initialization.");
1462 return 0;
1463 }
1464
1465 return link_initialized(link, device);
1466 }
1467
1468 int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
1469 int r, ifindex;
1470 const char *s;
1471 Link *link;
1472
1473 assert(m);
1474 assert(device);
1475
1476 r = sd_device_get_ifindex(device, &ifindex);
1477 if (r < 0)
1478 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
1479
1480 r = link_get_by_index(m, ifindex, &link);
1481 if (r < 0) {
1482 /* This error is not critical, as the corresponding rtnl message may be received later. */
1483 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1484 return 0;
1485 }
1486
1487 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1488 * object here. It will be removed only when rtnetlink says so. */
1489 if (action == SD_DEVICE_REMOVE) {
1490 link->dev = sd_device_unref(link->dev);
1491 return 0;
1492 }
1493
1494 r = device_is_renaming(device);
1495 if (r < 0)
1496 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
1497 if (r > 0) {
1498 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
1499 /* TODO:
1500 * What happens when a device is initialized, then soon renamed after that? When we detect
1501 * such, maybe we should cancel or postpone all queued requests for the interface. */
1502 return 0;
1503 }
1504
1505 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1506 if (r < 0 && r != -ENOENT)
1507 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1508 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1509 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1510 link_set_state(link, LINK_STATE_UNMANAGED);
1511 return 0;
1512 }
1513
1514 r = link_initialized(link, device);
1515 if (r < 0)
1516 link_enter_failed(link);
1517
1518 return 0;
1519 }
1520
1521 static int link_carrier_gained(Link *link) {
1522 bool force_reconfigure;
1523 int r;
1524
1525 assert(link);
1526
1527 r = event_source_disable(link->carrier_lost_timer);
1528 if (r < 0)
1529 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1530
1531 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1532 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1533 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1534 * restarted, and the correct network information will be gained.
1535 *
1536 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1537 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1538 * already assigned to the interface (in that case, the .network file does not have the SSID=
1539 * setting in the [Match] section), and the interface is already being configured. Of course,
1540 * there may exist another .network file with higher priority and a matching SSID= setting. But
1541 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1542 *
1543 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1544 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1545 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
1546 link->previous_ssid = mfree(link->previous_ssid);
1547
1548 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1549 * profile wants to match on it with SSID= in its [Match] section.
1550 */
1551 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1552 r = link_get_wlan_interface(link);
1553 if (r < 0)
1554 return r;
1555 }
1556
1557 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1558 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1559 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1560 r = link_reconfigure_impl(link, force_reconfigure);
1561 if (r != 0)
1562 return r;
1563
1564 r = link_handle_bound_by_list(link);
1565 if (r < 0)
1566 return r;
1567
1568 if (link->iftype == ARPHRD_CAN)
1569 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1570 return 0;
1571
1572 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
1573 r = link_acquire_dynamic_conf(link);
1574 if (r < 0)
1575 return r;
1576
1577 r = link_request_static_configs(link);
1578 if (r < 0)
1579 return r;
1580 }
1581
1582 return 0;
1583 }
1584
1585 static int link_carrier_lost_impl(Link *link) {
1586 int r, ret = 0;
1587
1588 assert(link);
1589
1590 link->previous_ssid = mfree(link->previous_ssid);
1591
1592 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1593 return 0;
1594
1595 if (!link->network)
1596 return 0;
1597
1598 r = link_stop_engines(link, false);
1599 if (r < 0)
1600 ret = r;
1601
1602 r = link_drop_managed_config(link);
1603 if (r < 0 && ret >= 0)
1604 ret = r;
1605
1606 return ret;
1607 }
1608
1609 static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
1610 Link *link = ASSERT_PTR(userdata);
1611 int r;
1612
1613 r = link_carrier_lost_impl(link);
1614 if (r < 0) {
1615 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1616 link_enter_failed(link);
1617 }
1618
1619 return 0;
1620 }
1621
1622 static int link_carrier_lost(Link *link) {
1623 uint16_t dhcp_mtu;
1624 usec_t usec;
1625 int r;
1626
1627 assert(link);
1628
1629 r = link_handle_bound_by_list(link);
1630 if (r < 0)
1631 return r;
1632
1633 if (link->iftype == ARPHRD_CAN)
1634 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1635 return 0;
1636
1637 if (!link->network)
1638 return 0;
1639
1640 if (link->network->ignore_carrier_loss_set)
1641 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1642 usec = link->network->ignore_carrier_loss_usec;
1643
1644 else if (link->network->bond && link->wlan_iftype > 0)
1645 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1646 * carrier to be lost. See #19832. */
1647 usec = 3 * USEC_PER_SEC;
1648
1649 else if (link->network->dhcp_use_mtu &&
1650 link->dhcp_lease &&
1651 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1652 dhcp_mtu != link->original_mtu)
1653 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1654 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1655 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1656 usec = 5 * USEC_PER_SEC;
1657
1658 else
1659 /* Otherwise, use the currently set value. */
1660 usec = link->network->ignore_carrier_loss_usec;
1661
1662 if (usec == USEC_INFINITY)
1663 return 0;
1664
1665 if (usec == 0)
1666 return link_carrier_lost_impl(link);
1667
1668 return event_reset_time_relative(link->manager->event,
1669 &link->carrier_lost_timer,
1670 CLOCK_BOOTTIME,
1671 usec,
1672 0,
1673 link_carrier_lost_handler,
1674 link,
1675 0,
1676 "link-carrier-loss",
1677 true);
1678 }
1679
1680 static int link_admin_state_up(Link *link) {
1681 int r;
1682
1683 assert(link);
1684
1685 /* This is called every time an interface admin state changes to up;
1686 * specifically, when IFF_UP flag changes from unset to set. */
1687
1688 if (!link->network)
1689 return 0;
1690
1691 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1692 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
1693 return link_request_to_bring_up_or_down(link, /* up = */ false);
1694 }
1695
1696 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1697 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1698 r = link_set_ipv6_mtu(link);
1699 if (r < 0)
1700 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1701
1702 return 0;
1703 }
1704
1705 static int link_admin_state_down(Link *link) {
1706 assert(link);
1707
1708 if (!link->network)
1709 return 0;
1710
1711 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1712 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
1713 return link_request_to_bring_up_or_down(link, /* up = */ true);
1714 }
1715
1716 return 0;
1717 }
1718
1719 static bool link_is_enslaved(Link *link) {
1720 if (link->flags & IFF_SLAVE)
1721 return true;
1722
1723 if (link->master_ifindex > 0)
1724 return true;
1725
1726 return false;
1727 }
1728
1729 void link_update_operstate(Link *link, bool also_update_master) {
1730 LinkOperationalState operstate;
1731 LinkCarrierState carrier_state;
1732 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1733 LinkOnlineState online_state;
1734 _cleanup_strv_free_ char **p = NULL;
1735 bool changed = false;
1736
1737 assert(link);
1738
1739 if (link->kernel_operstate == IF_OPER_DORMANT)
1740 carrier_state = LINK_CARRIER_STATE_DORMANT;
1741 else if (link_has_carrier(link)) {
1742 if (link_is_enslaved(link))
1743 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1744 else
1745 carrier_state = LINK_CARRIER_STATE_CARRIER;
1746 } else if (link->flags & IFF_UP)
1747 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1748 else
1749 carrier_state = LINK_CARRIER_STATE_OFF;
1750
1751 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1752 Link *slave;
1753
1754 SET_FOREACH(slave, link->slaves) {
1755 link_update_operstate(slave, false);
1756
1757 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1758 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1759 }
1760 }
1761
1762 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
1763
1764 /* Mapping of address and carrier state vs operational state
1765 * carrier state
1766 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1767 * ------------------------------------------------------------------------------
1768 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1769 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1770 * routable | off | no-carrier | dormant | routable | routable | routable
1771 */
1772
1773 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1774 operstate = LINK_OPERSTATE_ROUTABLE;
1775 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1776 operstate = LINK_OPERSTATE_DEGRADED;
1777 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1778 operstate = (LinkOperationalState) carrier_state;
1779 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1780 operstate = LINK_OPERSTATE_ROUTABLE;
1781 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1782 operstate = LINK_OPERSTATE_DEGRADED;
1783 else
1784 operstate = LINK_OPERSTATE_ENSLAVED;
1785
1786 /* Only determine online state for managed links with RequiredForOnline=yes */
1787 if (!link->network || !link->network->required_for_online)
1788 online_state = _LINK_ONLINE_STATE_INVALID;
1789 else if (operstate < link->network->required_operstate_for_online.min ||
1790 operstate > link->network->required_operstate_for_online.max)
1791 online_state = LINK_ONLINE_STATE_OFFLINE;
1792 else {
1793 AddressFamily required_family = link->network->required_family_for_online;
1794 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1795 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1796
1797 /* The operational state is within the range required for online.
1798 * If a particular address family is also required, we might revert
1799 * to offline in the blocks below. */
1800 online_state = LINK_ONLINE_STATE_ONLINE;
1801
1802 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1803 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1804 online_state = LINK_ONLINE_STATE_OFFLINE;
1805 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1806 online_state = LINK_ONLINE_STATE_OFFLINE;
1807 }
1808
1809 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1810 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1811 online_state = LINK_ONLINE_STATE_OFFLINE;
1812 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1813 online_state = LINK_ONLINE_STATE_OFFLINE;
1814 }
1815 }
1816
1817 if (link->carrier_state != carrier_state) {
1818 link->carrier_state = carrier_state;
1819 changed = true;
1820 if (strv_extend(&p, "CarrierState") < 0)
1821 log_oom();
1822 }
1823
1824 if (link->address_state != address_state) {
1825 link->address_state = address_state;
1826 changed = true;
1827 if (strv_extend(&p, "AddressState") < 0)
1828 log_oom();
1829 }
1830
1831 if (link->ipv4_address_state != ipv4_address_state) {
1832 link->ipv4_address_state = ipv4_address_state;
1833 changed = true;
1834 if (strv_extend(&p, "IPv4AddressState") < 0)
1835 log_oom();
1836 }
1837
1838 if (link->ipv6_address_state != ipv6_address_state) {
1839 link->ipv6_address_state = ipv6_address_state;
1840 changed = true;
1841 if (strv_extend(&p, "IPv6AddressState") < 0)
1842 log_oom();
1843 }
1844
1845 if (link->operstate != operstate) {
1846 link->operstate = operstate;
1847 changed = true;
1848 if (strv_extend(&p, "OperationalState") < 0)
1849 log_oom();
1850 }
1851
1852 if (link->online_state != online_state) {
1853 link->online_state = online_state;
1854 changed = true;
1855 if (strv_extend(&p, "OnlineState") < 0)
1856 log_oom();
1857 }
1858
1859 if (p)
1860 link_send_changed_strv(link, p);
1861 if (changed)
1862 link_dirty(link);
1863
1864 if (also_update_master) {
1865 Link *master;
1866
1867 if (link_get_master(link, &master) >= 0)
1868 link_update_operstate(master, true);
1869 }
1870 }
1871
1872 #define FLAG_STRING(string, flag, old, new) \
1873 (((old ^ new) & flag) \
1874 ? ((old & flag) ? (" -" string) : (" +" string)) \
1875 : "")
1876
1877 static int link_update_flags(Link *link, sd_netlink_message *message) {
1878 bool link_was_admin_up, had_carrier;
1879 uint8_t operstate;
1880 unsigned flags;
1881 int r;
1882
1883 assert(link);
1884 assert(message);
1885
1886 r = sd_rtnl_message_link_get_flags(message, &flags);
1887 if (r < 0)
1888 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
1889
1890 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1891 if (r == -ENODATA)
1892 /* If we got a message without operstate, assume the state was unchanged. */
1893 operstate = link->kernel_operstate;
1894 else if (r < 0)
1895 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
1896
1897 if (link->flags == flags && link->kernel_operstate == operstate)
1898 return 0;
1899
1900 if (link->flags != flags) {
1901 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
1902
1903 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
1904 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1905 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1906 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1907 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1908 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1909 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1910 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1911 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1912 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1913 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1914 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1915 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1916 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1917 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1918 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1919 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1920 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1921 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1922 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
1923
1924 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1925 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1926 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1927 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1928 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1929 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1930 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1931 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
1932
1933 if (unknown_flags_added)
1934 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
1935
1936 if (unknown_flags_removed)
1937 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1938 }
1939
1940 link_was_admin_up = link->flags & IFF_UP;
1941 had_carrier = link_has_carrier(link);
1942
1943 link->flags = flags;
1944 link->kernel_operstate = operstate;
1945
1946 link_update_operstate(link, true);
1947
1948 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1949 log_link_info(link, "Link UP");
1950
1951 r = link_admin_state_up(link);
1952 if (r < 0)
1953 return r;
1954 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1955 log_link_info(link, "Link DOWN");
1956
1957 r = link_admin_state_down(link);
1958 if (r < 0)
1959 return r;
1960 }
1961
1962 if (!had_carrier && link_has_carrier(link)) {
1963 log_link_info(link, "Gained carrier");
1964
1965 r = link_carrier_gained(link);
1966 if (r < 0)
1967 return r;
1968 } else if (had_carrier && !link_has_carrier(link)) {
1969 log_link_info(link, "Lost carrier");
1970
1971 r = link_carrier_lost(link);
1972 if (r < 0)
1973 return r;
1974 }
1975
1976 return 0;
1977 }
1978
1979 static int link_update_master(Link *link, sd_netlink_message *message) {
1980 int master_ifindex, r;
1981
1982 assert(link);
1983 assert(message);
1984
1985 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1986 if (r == -ENODATA)
1987 return 0;
1988 if (r < 0)
1989 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
1990
1991 if (master_ifindex == link->ifindex)
1992 master_ifindex = 0;
1993
1994 if (master_ifindex == link->master_ifindex)
1995 return 0;
1996
1997 if (link->master_ifindex == 0)
1998 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
1999 else if (master_ifindex == 0)
2000 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
2001 else
2002 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2003 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
2004
2005 link_drop_from_master(link);
2006
2007 link->master_ifindex = master_ifindex;
2008
2009 r = link_append_to_master(link);
2010 if (r < 0)
2011 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
2012
2013 return 0;
2014 }
2015
2016 static int link_update_driver(Link *link, sd_netlink_message *message) {
2017 int r;
2018
2019 assert(link);
2020 assert(link->manager);
2021 assert(message);
2022
2023 /* Driver is already read. Assuming the driver is never changed. */
2024 if (link->ethtool_driver_read)
2025 return 0;
2026
2027 /* When udevd is running, read the driver after the interface is initialized by udevd.
2028 * Otherwise, ethtool may not work correctly. See issue #22538.
2029 * When udevd is not running, read the value when the interface is detected. */
2030 if (udev_available() && !link->dev)
2031 return 0;
2032
2033 link->ethtool_driver_read = true;
2034
2035 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2036 if (r < 0) {
2037 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2038 return 0;
2039 }
2040
2041 log_link_debug(link, "Found driver: %s", strna(link->driver));
2042
2043 if (streq_ptr(link->driver, "dsa")) {
2044 uint32_t dsa_master_ifindex = 0;
2045
2046 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2047 if (r < 0 && r != -ENODATA)
2048 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2049
2050 if (dsa_master_ifindex > INT_MAX) {
2051 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2052 dsa_master_ifindex);
2053 dsa_master_ifindex = 0;
2054 }
2055
2056 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2057 }
2058
2059 return 1; /* needs reconfigure */
2060 }
2061
2062 static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
2063 int r;
2064
2065 assert(link);
2066 assert(link->manager);
2067 assert(message);
2068
2069 if (link->ethtool_permanent_hw_addr_read)
2070 return 0;
2071
2072 /* When udevd is running, read the permanent hardware address after the interface is
2073 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2074 * When udevd is not running, read the value when the interface is detected. */
2075 if (udev_available() && !link->dev)
2076 return 0;
2077
2078 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2079 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2080 if (r == -ENODATA)
2081 return 0;
2082 if (r < 0)
2083 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2084
2085 link->ethtool_permanent_hw_addr_read = true;
2086
2087 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2088 if (r < 0)
2089 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2090
2091 return 0;
2092 }
2093
2094 static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2095 int r;
2096
2097 assert(link);
2098 assert(link->manager);
2099 assert(message);
2100
2101 if (link->permanent_hw_addr.length > 0)
2102 return 0;
2103
2104 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2105 if (r < 0) {
2106 if (r != -ENODATA)
2107 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2108
2109 /* Fallback to ethtool for older kernels. */
2110 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2111 if (r < 0)
2112 return r;
2113 }
2114
2115 if (link->permanent_hw_addr.length > 0)
2116 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2117
2118 return 1; /* needs reconfigure */
2119 }
2120
2121 static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
2122 struct hw_addr_data addr;
2123 int r;
2124
2125 assert(link);
2126 assert(message);
2127
2128 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2129 if (r < 0 && r != -ENODATA)
2130 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
2131
2132 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
2133 if (r == -ENODATA)
2134 return 0;
2135 if (r < 0)
2136 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
2137
2138 if (hw_addr_equal(&link->hw_addr, &addr))
2139 return 0;
2140
2141 if (link->hw_addr.length == 0)
2142 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
2143 else {
2144 log_link_debug(link, "Hardware address is changed: %s %s %s",
2145 HW_ADDR_TO_STR(&link->hw_addr),
2146 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2147 HW_ADDR_TO_STR(&addr));
2148
2149 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
2150 }
2151
2152 link->hw_addr = addr;
2153
2154 if (!hw_addr_is_null(&link->hw_addr)) {
2155 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2156 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2157 /* bonding master and its slaves have the same hardware address. */
2158 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2159 if (r < 0)
2160 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2161 }
2162
2163 r = ipv4acd_update_mac(link);
2164 if (r < 0)
2165 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2166
2167 r = ipv4ll_update_mac(link);
2168 if (r < 0)
2169 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
2170
2171 r = dhcp4_update_mac(link);
2172 if (r < 0)
2173 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
2174
2175 r = dhcp6_update_mac(link);
2176 if (r < 0)
2177 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2178
2179 r = radv_update_mac(link);
2180 if (r < 0)
2181 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2182
2183 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
2184 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
2185 if (r < 0)
2186 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2187 }
2188
2189 if (link->lldp_rx) {
2190 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
2191 if (r < 0)
2192 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2193 }
2194
2195 if (link->lldp_tx) {
2196 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2197 if (r < 0)
2198 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
2199 }
2200
2201 return 1; /* needs reconfigure */
2202 }
2203
2204 static int link_update_mtu(Link *link, sd_netlink_message *message) {
2205 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
2206 int r;
2207
2208 assert(link);
2209 assert(message);
2210
2211 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2212 if (r == -ENODATA)
2213 return 0;
2214 if (r < 0)
2215 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2216 if (mtu == 0)
2217 return 0;
2218
2219 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2220 if (r < 0 && r != -ENODATA)
2221 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2222
2223 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2224 if (r < 0 && r != -ENODATA)
2225 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2226
2227 if (max_mtu == 0)
2228 max_mtu = UINT32_MAX;
2229
2230 link->min_mtu = min_mtu;
2231 link->max_mtu = max_mtu;
2232
2233 if (link->original_mtu == 0) {
2234 link->original_mtu = mtu;
2235 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2236 link->original_mtu, link->min_mtu, link->max_mtu);
2237 }
2238
2239 if (link->mtu == mtu)
2240 return 0;
2241
2242 if (link->mtu != 0)
2243 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2244 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2245 link->min_mtu, link->max_mtu);
2246
2247 link->mtu = mtu;
2248
2249 if (link->dhcp_client) {
2250 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
2251 if (r < 0)
2252 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2253 }
2254
2255 if (link->radv) {
2256 r = sd_radv_set_mtu(link->radv, link->mtu);
2257 if (r < 0)
2258 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2259 }
2260
2261 return 0;
2262 }
2263
2264 static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2265 _cleanup_strv_free_ char **altnames = NULL;
2266 int r;
2267
2268 assert(link);
2269 assert(message);
2270
2271 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2272 if (r == -ENODATA)
2273 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
2274 * interface has no alternative name. */
2275 return 0;
2276 if (r < 0)
2277 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2278
2279 if (strv_equal(altnames, link->alternative_names))
2280 return 0;
2281
2282 STRV_FOREACH(n, link->alternative_names)
2283 hashmap_remove(link->manager->links_by_name, *n);
2284
2285 strv_free_and_replace(link->alternative_names, altnames);
2286
2287 STRV_FOREACH(n, link->alternative_names) {
2288 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2289 if (r < 0)
2290 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2291 }
2292
2293 return 1; /* needs reconfigure */
2294 }
2295
2296 static int link_update_name(Link *link, sd_netlink_message *message) {
2297 char ifname_from_index[IF_NAMESIZE];
2298 const char *ifname;
2299 int r;
2300
2301 assert(link);
2302 assert(message);
2303
2304 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2305 if (r == -ENODATA)
2306 /* Hmm?? But ok. */
2307 return 0;
2308 if (r < 0)
2309 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2310
2311 if (streq(ifname, link->ifname))
2312 return 0;
2313
2314 r = format_ifname(link->ifindex, ifname_from_index);
2315 if (r < 0)
2316 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
2317
2318 if (!streq(ifname, ifname_from_index)) {
2319 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2320 "with the name currently configured on the actual interface '%s'. Ignoring.",
2321 ifname, ifname_from_index);
2322 return 0;
2323 }
2324
2325 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2326
2327 hashmap_remove(link->manager->links_by_name, link->ifname);
2328
2329 r = free_and_strdup(&link->ifname, ifname);
2330 if (r < 0)
2331 return log_oom_debug();
2332
2333 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2334 if (r < 0)
2335 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2336
2337 if (link->dhcp_client) {
2338 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2339 if (r < 0)
2340 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2341 }
2342
2343 if (link->dhcp6_client) {
2344 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2345 if (r < 0)
2346 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2347 }
2348
2349 if (link->ndisc) {
2350 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2351 if (r < 0)
2352 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2353 }
2354
2355 if (link->dhcp_server) {
2356 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2357 if (r < 0)
2358 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2359 }
2360
2361 if (link->radv) {
2362 r = sd_radv_set_ifname(link->radv, link->ifname);
2363 if (r < 0)
2364 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2365 }
2366
2367 if (link->lldp_rx) {
2368 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
2369 if (r < 0)
2370 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2371 }
2372
2373 if (link->lldp_tx) {
2374 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2375 if (r < 0)
2376 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
2377 }
2378
2379 if (link->ipv4ll) {
2380 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2381 if (r < 0)
2382 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2383 }
2384
2385 r = ipv4acd_set_ifname(link);
2386 if (r < 0)
2387 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
2388
2389 return 1; /* needs reconfigure */
2390 }
2391
2392 static int link_update(Link *link, sd_netlink_message *message) {
2393 bool needs_reconfigure = false;
2394 int r;
2395
2396 assert(link);
2397 assert(message);
2398
2399 r = link_update_name(link, message);
2400 if (r < 0)
2401 return r;
2402 needs_reconfigure = needs_reconfigure || r > 0;
2403
2404 r = link_update_alternative_names(link, message);
2405 if (r < 0)
2406 return r;
2407 needs_reconfigure = needs_reconfigure || r > 0;
2408
2409 r = link_update_mtu(link, message);
2410 if (r < 0)
2411 return r;
2412
2413 r = link_update_driver(link, message);
2414 if (r < 0)
2415 return r;
2416 needs_reconfigure = needs_reconfigure || r > 0;
2417
2418 r = link_update_permanent_hardware_address(link, message);
2419 if (r < 0)
2420 return r;
2421 needs_reconfigure = needs_reconfigure || r > 0;
2422
2423 r = link_update_hardware_address(link, message);
2424 if (r < 0)
2425 return r;
2426 needs_reconfigure = needs_reconfigure || r > 0;
2427
2428 r = link_update_master(link, message);
2429 if (r < 0)
2430 return r;
2431
2432 r = link_update_ipv6ll_addrgen_mode(link, message);
2433 if (r < 0)
2434 return r;
2435
2436 r = link_update_flags(link, message);
2437 if (r < 0)
2438 return r;
2439
2440 r = link_update_bridge_vlan(link, message);
2441 if (r < 0)
2442 return r;
2443
2444 return needs_reconfigure;
2445 }
2446
2447 static Link *link_drop_or_unref(Link *link) {
2448 if (!link)
2449 return NULL;
2450 if (!link->manager)
2451 return link_unref(link);
2452 return link_drop(link);
2453 }
2454
2455 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2456
2457 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2458 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
2459 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2460 unsigned short iftype;
2461 int r, ifindex;
2462
2463 assert(manager);
2464 assert(message);
2465 assert(ret);
2466
2467 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2468 if (r < 0)
2469 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
2470 else if (ifindex <= 0)
2471 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
2472
2473 r = sd_rtnl_message_link_get_type(message, &iftype);
2474 if (r < 0)
2475 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
2476
2477 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2478 if (r < 0)
2479 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
2480
2481 /* check for link kind */
2482 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2483 if (r >= 0) {
2484 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2485 if (r < 0 && r != -ENODATA)
2486 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
2487 r = sd_netlink_message_exit_container(message);
2488 if (r < 0)
2489 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2490 }
2491
2492 if (!manager->test_mode) {
2493 /* Do not update state files when running in test mode. */
2494 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2495 return log_oom_debug();
2496
2497 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2498 return log_oom_debug();
2499
2500 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2501 return log_oom_debug();
2502 }
2503
2504 link = new(Link, 1);
2505 if (!link)
2506 return -ENOMEM;
2507
2508 *link = (Link) {
2509 .n_ref = 1,
2510 .state = LINK_STATE_PENDING,
2511 .online_state = _LINK_ONLINE_STATE_INVALID,
2512 .ifindex = ifindex,
2513 .iftype = iftype,
2514 .ifname = TAKE_PTR(ifname),
2515 .kind = TAKE_PTR(kind),
2516
2517 .bridge_vlan_pvid = UINT16_MAX,
2518
2519 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2520
2521 .state_file = TAKE_PTR(state_file),
2522 .lease_file = TAKE_PTR(lease_file),
2523 .lldp_file = TAKE_PTR(lldp_file),
2524
2525 .n_dns = UINT_MAX,
2526 .dns_default_route = -1,
2527 .llmnr = _RESOLVE_SUPPORT_INVALID,
2528 .mdns = _RESOLVE_SUPPORT_INVALID,
2529 .dnssec_mode = _DNSSEC_MODE_INVALID,
2530 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2531 };
2532
2533 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
2534 if (r < 0)
2535 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
2536
2537 link->manager = manager;
2538
2539 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2540 if (r < 0)
2541 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
2542
2543 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2544 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2545
2546 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2547 * message arrived too early. Request the wireless link information again.
2548 */
2549 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2550 r = link_get_wlan_interface(link);
2551 if (r < 0)
2552 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2553 }
2554
2555 *ret = TAKE_PTR(link);
2556 return 0;
2557 }
2558
2559 int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
2560 Link *link = NULL;
2561 NetDev *netdev = NULL;
2562 uint16_t type;
2563 const char *name;
2564 int r, ifindex;
2565
2566 assert(rtnl);
2567 assert(message);
2568 assert(manager);
2569
2570 if (sd_netlink_message_is_error(message)) {
2571 r = sd_netlink_message_get_errno(message);
2572 if (r < 0)
2573 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2574
2575 return 0;
2576 }
2577
2578 r = sd_netlink_message_get_type(message, &type);
2579 if (r < 0) {
2580 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2581 return 0;
2582 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2583 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2584 return 0;
2585 }
2586
2587 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2588 if (r < 0) {
2589 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2590 return 0;
2591 } else if (ifindex <= 0) {
2592 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2593 return 0;
2594 }
2595
2596 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2597 if (r < 0) {
2598 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2599 return 0;
2600 }
2601
2602 (void) link_get_by_index(manager, ifindex, &link);
2603 (void) netdev_get(manager, name, &netdev);
2604
2605 switch (type) {
2606 case RTM_NEWLINK:
2607 if (netdev) {
2608 /* netdev exists, so make sure the ifindex matches */
2609 r = netdev_set_ifindex(netdev, message);
2610 if (r < 0) {
2611 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
2612 return 0;
2613 }
2614 }
2615
2616 if (!link) {
2617 /* link is new, so add it */
2618 r = link_new(manager, message, &link);
2619 if (r < 0) {
2620 log_warning_errno(r, "Could not process new link message: %m");
2621 return 0;
2622 }
2623
2624 r = link_update(link, message);
2625 if (r < 0) {
2626 log_link_warning_errno(link, r, "Could not process link message: %m");
2627 link_enter_failed(link);
2628 return 0;
2629 }
2630
2631 r = link_check_initialized(link);
2632 if (r < 0) {
2633 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
2634 link_enter_failed(link);
2635 return 0;
2636 }
2637 } else {
2638 r = link_update(link, message);
2639 if (r < 0) {
2640 log_link_warning_errno(link, r, "Could not process link message: %m");
2641 link_enter_failed(link);
2642 return 0;
2643 }
2644 if (r > 0) {
2645 r = link_reconfigure_impl(link, /* force = */ false);
2646 if (r < 0) {
2647 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2648 link_enter_failed(link);
2649 return 0;
2650 }
2651 }
2652 }
2653 break;
2654
2655 case RTM_DELLINK:
2656 link_drop(link);
2657 netdev_drop(netdev);
2658 break;
2659
2660 default:
2661 assert_not_reached();
2662 }
2663
2664 return 1;
2665 }
2666
2667 int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2668 uint16_t message_type;
2669 int r;
2670
2671 assert(m);
2672 assert(link);
2673 assert(error_msg);
2674
2675 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2676 return 0;
2677
2678 r = sd_netlink_message_get_errno(m);
2679 if (r < 0) {
2680 log_link_message_warning_errno(link, m, r, error_msg);
2681 link_enter_failed(link);
2682 return 0;
2683 }
2684
2685 r = sd_netlink_message_get_type(m, &message_type);
2686 if (r < 0) {
2687 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2688 return 0;
2689 }
2690 if (message_type != RTM_NEWLINK) {
2691 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2692 return 0;
2693 }
2694
2695 r = link_update(link, m);
2696 if (r < 0) {
2697 link_enter_failed(link);
2698 return 0;
2699 }
2700
2701 return 1;
2702 }
2703
2704 int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2705 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2706 int r;
2707
2708 assert(link);
2709 assert(link->manager);
2710 assert(link->manager->rtnl);
2711 assert(callback);
2712
2713 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2714 if (r < 0)
2715 return r;
2716
2717 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2718 link_netlink_destroy_callback, link);
2719 if (r < 0)
2720 return r;
2721
2722 link_ref(link);
2723 return 0;
2724 }
2725
2726 static const char* const link_state_table[_LINK_STATE_MAX] = {
2727 [LINK_STATE_PENDING] = "pending",
2728 [LINK_STATE_INITIALIZED] = "initialized",
2729 [LINK_STATE_CONFIGURING] = "configuring",
2730 [LINK_STATE_CONFIGURED] = "configured",
2731 [LINK_STATE_UNMANAGED] = "unmanaged",
2732 [LINK_STATE_FAILED] = "failed",
2733 [LINK_STATE_LINGER] = "linger",
2734 };
2735
2736 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
2737
2738 int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2739 _cleanup_free_ char *str = NULL;
2740 static const char* map[] = {
2741 [LOG2U(IFF_UP)] = "up", /* interface is up. */
2742 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
2743 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2744 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2745 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2746 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2747 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2748 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2749 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2750 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2751 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2752 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
2753 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
2754 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2755 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2756 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2757 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2758 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2759 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
2760 };
2761
2762 assert(ret);
2763
2764 for (size_t i = 0; i < ELEMENTSOF(map); i++)
2765 if (FLAGS_SET(flags, 1 << i) && map[i])
2766 if (!strextend_with_separator(&str, ",", map[i]))
2767 return -ENOMEM;
2768
2769 *ret = TAKE_PTR(str);
2770 return 0;
2771 }
2772
2773 static const char * const kernel_operstate_table[] = {
2774 [IF_OPER_UNKNOWN] = "unknown",
2775 [IF_OPER_NOTPRESENT] = "not-present",
2776 [IF_OPER_DOWN] = "down",
2777 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2778 [IF_OPER_TESTING] = "testing",
2779 [IF_OPER_DORMANT] = "dormant",
2780 [IF_OPER_UP] = "up",
2781 };
2782
2783 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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