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[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 "ipvlan.h"
30 #include "missing_network.h"
31 #include "netlink-util.h"
32 #include "network-internal.h"
33 #include "networkd-address-label.h"
34 #include "networkd-address.h"
35 #include "networkd-bridge-fdb.h"
36 #include "networkd-bridge-mdb.h"
37 #include "networkd-can.h"
38 #include "networkd-dhcp-prefix-delegation.h"
39 #include "networkd-dhcp-server.h"
40 #include "networkd-dhcp4.h"
41 #include "networkd-dhcp6.h"
42 #include "networkd-ipv4acd.h"
43 #include "networkd-ipv4ll.h"
44 #include "networkd-ipv6-proxy-ndp.h"
45 #include "networkd-link-bus.h"
46 #include "networkd-link.h"
47 #include "networkd-lldp-tx.h"
48 #include "networkd-manager.h"
49 #include "networkd-ndisc.h"
50 #include "networkd-neighbor.h"
51 #include "networkd-nexthop.h"
52 #include "networkd-queue.h"
53 #include "networkd-radv.h"
54 #include "networkd-route.h"
55 #include "networkd-routing-policy-rule.h"
56 #include "networkd-setlink.h"
57 #include "networkd-sriov.h"
58 #include "networkd-state-file.h"
59 #include "networkd-sysctl.h"
60 #include "set.h"
61 #include "socket-util.h"
62 #include "stdio-util.h"
63 #include "string-table.h"
64 #include "strv.h"
65 #include "tc.h"
66 #include "tmpfile-util.h"
67 #include "udev-util.h"
68 #include "util.h"
69 #include "vrf.h"
70
71 bool link_ipv4ll_enabled(Link *link) {
72 assert(link);
73
74 if (link->flags & IFF_LOOPBACK)
75 return false;
76
77 if (!link->network)
78 return false;
79
80 if (link->iftype == ARPHRD_CAN)
81 return false;
82
83 if (link->hw_addr.length != ETH_ALEN)
84 return false;
85
86 if (ether_addr_is_null(&link->hw_addr.ether))
87 return false;
88
89 /* ARPHRD_INFINIBAND seems to potentially support IPv4LL.
90 * But currently sd-ipv4ll and sd-ipv4acd only support ARPHRD_ETHER. */
91 if (link->iftype != ARPHRD_ETHER)
92 return false;
93
94 if (streq_ptr(link->kind, "vrf"))
95 return false;
96
97 /* L3 or L3S mode do not support ARP. */
98 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
99 return false;
100
101 if (link->network->bond)
102 return false;
103
104 return link->network->link_local & ADDRESS_FAMILY_IPV4;
105 }
106
107 bool link_ipv6_enabled(Link *link) {
108 assert(link);
109
110 if (!socket_ipv6_is_supported())
111 return false;
112
113 if (link->network->bond)
114 return false;
115
116 if (link->iftype == ARPHRD_CAN)
117 return false;
118
119 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
120 if (link_ipv6ll_enabled(link))
121 return true;
122
123 if (network_has_static_ipv6_configurations(link->network))
124 return true;
125
126 return false;
127 }
128
129 bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
130 assert(link);
131
132 if (!link->network) {
133 if (!allow_unmanaged)
134 return false;
135
136 return link_has_carrier(link);
137 }
138
139 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
140 return false;
141
142 if (!link->network->configure_without_carrier) {
143 if (link->set_flags_messages > 0)
144 return false;
145
146 if (!link_has_carrier(link))
147 return false;
148 }
149
150 if (link->set_link_messages > 0)
151 return false;
152
153 if (!link->activated)
154 return false;
155
156 return true;
157 }
158
159 void link_ntp_settings_clear(Link *link) {
160 link->ntp = strv_free(link->ntp);
161 }
162
163 void link_dns_settings_clear(Link *link) {
164 if (link->n_dns != UINT_MAX)
165 for (unsigned i = 0; i < link->n_dns; i++)
166 in_addr_full_free(link->dns[i]);
167 link->dns = mfree(link->dns);
168 link->n_dns = UINT_MAX;
169
170 link->search_domains = ordered_set_free(link->search_domains);
171 link->route_domains = ordered_set_free(link->route_domains);
172
173 link->dns_default_route = -1;
174 link->llmnr = _RESOLVE_SUPPORT_INVALID;
175 link->mdns = _RESOLVE_SUPPORT_INVALID;
176 link->dnssec_mode = _DNSSEC_MODE_INVALID;
177 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
178
179 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
180 }
181
182 static void link_free_engines(Link *link) {
183 if (!link)
184 return;
185
186 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
187 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
188 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
189 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
190
191 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
192 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
193
194 ndisc_flush(link);
195
196 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
197 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
198 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
199 link->ndisc = sd_ndisc_unref(link->ndisc);
200 link->radv = sd_radv_unref(link->radv);
201 }
202
203 static Link *link_free(Link *link) {
204 assert(link);
205
206 link_ntp_settings_clear(link);
207 link_dns_settings_clear(link);
208
209 link->routes = set_free(link->routes);
210 link->nexthops = set_free(link->nexthops);
211 link->neighbors = set_free(link->neighbors);
212 link->addresses = set_free(link->addresses);
213 link->qdiscs = set_free(link->qdiscs);
214 link->tclasses = set_free(link->tclasses);
215
216 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
217
218 link_free_engines(link);
219
220 free(link->ifname);
221 strv_free(link->alternative_names);
222 free(link->kind);
223 free(link->ssid);
224 free(link->previous_ssid);
225 free(link->driver);
226
227 unlink_and_free(link->lease_file);
228 unlink_and_free(link->lldp_file);
229 unlink_and_free(link->state_file);
230
231 sd_device_unref(link->sd_device);
232 netdev_unref(link->netdev);
233
234 hashmap_free(link->bound_to_links);
235 hashmap_free(link->bound_by_links);
236
237 set_free_with_destructor(link->slaves, link_unref);
238
239 network_unref(link->network);
240
241 sd_event_source_disable_unref(link->carrier_lost_timer);
242
243 return mfree(link);
244 }
245
246 DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
247
248 int link_get_by_index(Manager *m, int ifindex, Link **ret) {
249 Link *link;
250
251 assert(m);
252 assert(ifindex > 0);
253
254 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
255 if (!link)
256 return -ENODEV;
257
258 if (ret)
259 *ret = link;
260 return 0;
261 }
262
263 int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
264 Link *link;
265
266 assert(m);
267 assert(ifname);
268
269 link = hashmap_get(m->links_by_name, ifname);
270 if (!link)
271 return -ENODEV;
272
273 if (ret)
274 *ret = link;
275 return 0;
276 }
277
278 int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
279 Link *link;
280
281 assert(m);
282 assert(hw_addr);
283
284 link = hashmap_get(m->links_by_hw_addr, hw_addr);
285 if (!link)
286 return -ENODEV;
287
288 if (ret)
289 *ret = link;
290 return 0;
291 }
292
293 int link_get_master(Link *link, Link **ret) {
294 assert(link);
295 assert(link->manager);
296 assert(ret);
297
298 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
299 return -ENODEV;
300
301 return link_get_by_index(link->manager, link->master_ifindex, ret);
302 }
303
304 void link_set_state(Link *link, LinkState state) {
305 assert(link);
306
307 if (link->state == state)
308 return;
309
310 log_link_debug(link, "State changed: %s -> %s",
311 link_state_to_string(link->state),
312 link_state_to_string(state));
313
314 link->state = state;
315
316 link_send_changed(link, "AdministrativeState", NULL);
317 link_dirty(link);
318 }
319
320 int link_stop_engines(Link *link, bool may_keep_dhcp) {
321 int r = 0, k;
322
323 assert(link);
324 assert(link->manager);
325 assert(link->manager->event);
326
327 bool keep_dhcp = may_keep_dhcp &&
328 link->network &&
329 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
330 (link->manager->restarting ||
331 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
332
333 if (!keep_dhcp) {
334 k = sd_dhcp_client_stop(link->dhcp_client);
335 if (k < 0)
336 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
337 }
338
339 k = sd_dhcp_server_stop(link->dhcp_server);
340 if (k < 0)
341 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
342
343 k = sd_lldp_rx_stop(link->lldp_rx);
344 if (k < 0)
345 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
346
347 k = sd_lldp_tx_stop(link->lldp_tx);
348 if (k < 0)
349 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
350
351 k = sd_ipv4ll_stop(link->ipv4ll);
352 if (k < 0)
353 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
354
355 k = ipv4acd_stop(link);
356 if (k < 0)
357 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
358
359 k = sd_dhcp6_client_stop(link->dhcp6_client);
360 if (k < 0)
361 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
362
363 k = dhcp_pd_remove(link, /* only_marked = */ false);
364 if (k < 0)
365 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
366
367 k = sd_ndisc_stop(link->ndisc);
368 if (k < 0)
369 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
370
371 ndisc_flush(link);
372
373 k = sd_radv_stop(link->radv);
374 if (k < 0)
375 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
376
377 return r;
378 }
379
380 void link_enter_failed(Link *link) {
381 assert(link);
382
383 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
384 return;
385
386 log_link_warning(link, "Failed");
387
388 link_set_state(link, LINK_STATE_FAILED);
389
390 (void) link_stop_engines(link, false);
391 }
392
393 void link_check_ready(Link *link) {
394 Address *a;
395
396 assert(link);
397
398 if (link->state == LINK_STATE_CONFIGURED)
399 return;
400
401 if (link->state != LINK_STATE_CONFIGURING)
402 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
403
404 if (!link->network)
405 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
406
407 if (!link->tc_configured)
408 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
409
410 if (link->set_link_messages > 0)
411 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
412
413 if (!link->activated)
414 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
415
416 if (link->iftype == ARPHRD_CAN) {
417 /* let's shortcut things for CAN which doesn't need most of checks below. */
418 link_set_state(link, LINK_STATE_CONFIGURED);
419 return;
420 }
421
422 if (!link->stacked_netdevs_created)
423 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
424
425 if (!link->static_addresses_configured)
426 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
427
428 SET_FOREACH(a, link->addresses)
429 if (!address_is_ready(a)) {
430 _cleanup_free_ char *str = NULL;
431
432 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
433 return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__, strna(str));
434 }
435
436 if (!link->static_address_labels_configured)
437 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
438
439 if (!link->static_bridge_fdb_configured)
440 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
441
442 if (!link->static_bridge_mdb_configured)
443 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
444
445 if (!link->static_ipv6_proxy_ndp_configured)
446 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
447
448 if (!link->static_neighbors_configured)
449 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
450
451 if (!link->static_nexthops_configured)
452 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
453
454 if (!link->static_routes_configured)
455 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
456
457 if (!link->static_routing_policy_rules_configured)
458 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
459
460 if (!link->sr_iov_configured)
461 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
462
463 /* IPv6LL is assigned after the link gains its carrier. */
464 if (!link->network->configure_without_carrier &&
465 link_ipv6ll_enabled(link) &&
466 !in6_addr_is_set(&link->ipv6ll_address))
467 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
468
469 bool has_dynamic_address = false;
470 SET_FOREACH(a, link->addresses) {
471 if (address_is_marked(a))
472 continue;
473 if (!address_exists(a))
474 continue;
475 if (IN_SET(a->source,
476 NETWORK_CONFIG_SOURCE_IPV4LL,
477 NETWORK_CONFIG_SOURCE_DHCP4,
478 NETWORK_CONFIG_SOURCE_DHCP6,
479 NETWORK_CONFIG_SOURCE_DHCP_PD,
480 NETWORK_CONFIG_SOURCE_NDISC)) {
481 has_dynamic_address = true;
482 break;
483 }
484 }
485
486 if ((link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) ||
487 (link_dhcp_pd_is_enabled(link) && link->network->dhcp_pd_assign)) && !has_dynamic_address)
488 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
489 return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
490
491 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
492 if (link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) ||
493 link_dhcp6_enabled(link) || link_dhcp_pd_is_enabled(link) ||
494 (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link))) {
495
496 if (!link->ipv4ll_address_configured && !link->dhcp4_configured &&
497 !link->dhcp6_configured && !link->dhcp_pd_configured && !link->ndisc_configured)
498 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
499 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
500
501 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
502 __func__,
503 yes_no(link->ipv4ll_address_configured),
504 yes_no(link->dhcp4_configured),
505 yes_no(link->dhcp6_configured),
506 yes_no(link->dhcp_pd_configured),
507 yes_no(link->ndisc_configured));
508 }
509
510 link_set_state(link, LINK_STATE_CONFIGURED);
511 }
512
513 static int link_request_static_configs(Link *link) {
514 int r;
515
516 assert(link);
517 assert(link->network);
518 assert(link->state != _LINK_STATE_INVALID);
519
520 r = link_request_static_addresses(link);
521 if (r < 0)
522 return r;
523
524 r = link_request_static_address_labels(link);
525 if (r < 0)
526 return r;
527
528 r = link_request_static_bridge_fdb(link);
529 if (r < 0)
530 return r;
531
532 r = link_request_static_bridge_mdb(link);
533 if (r < 0)
534 return r;
535
536 r = link_request_static_ipv6_proxy_ndp_addresses(link);
537 if (r < 0)
538 return r;
539
540 r = link_request_static_neighbors(link);
541 if (r < 0)
542 return r;
543
544 r = link_request_static_nexthops(link, false);
545 if (r < 0)
546 return r;
547
548 r = link_request_static_routes(link, false);
549 if (r < 0)
550 return r;
551
552 r = link_request_static_routing_policy_rules(link);
553 if (r < 0)
554 return r;
555
556 return 0;
557 }
558
559 static int link_request_stacked_netdevs(Link *link) {
560 NetDev *netdev;
561 int r;
562
563 assert(link);
564
565 link->stacked_netdevs_created = false;
566
567 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
568 r = link_request_stacked_netdev(link, netdev);
569 if (r < 0)
570 return r;
571 }
572
573 if (link->create_stacked_netdev_messages == 0) {
574 link->stacked_netdevs_created = true;
575 link_check_ready(link);
576 }
577
578 return 0;
579 }
580
581 static int link_acquire_dynamic_ipv6_conf(Link *link) {
582 int r;
583
584 assert(link);
585
586 r = radv_start(link);
587 if (r < 0)
588 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
589
590 r = ndisc_start(link);
591 if (r < 0)
592 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
593
594 r = dhcp6_start(link);
595 if (r < 0)
596 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
597
598 return 0;
599 }
600
601 static int link_acquire_dynamic_ipv4_conf(Link *link) {
602 int r;
603
604 assert(link);
605 assert(link->manager);
606 assert(link->manager->event);
607
608 if (link->dhcp_client) {
609 r = dhcp4_start(link);
610 if (r < 0)
611 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
612
613 log_link_debug(link, "Acquiring DHCPv4 lease.");
614
615 } else if (link->ipv4ll) {
616 r = sd_ipv4ll_start(link->ipv4ll);
617 if (r < 0)
618 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
619
620 log_link_debug(link, "Acquiring IPv4 link-local address.");
621 }
622
623 if (link->dhcp_server) {
624 r = sd_dhcp_server_start(link->dhcp_server);
625 if (r < 0)
626 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
627 }
628
629 r = ipv4acd_start(link);
630 if (r < 0)
631 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
632
633 return 0;
634 }
635
636 static int link_acquire_dynamic_conf(Link *link) {
637 int r;
638
639 assert(link);
640 assert(link->network);
641
642 r = link_acquire_dynamic_ipv4_conf(link);
643 if (r < 0)
644 return r;
645
646 if (in6_addr_is_set(&link->ipv6ll_address)) {
647 r = link_acquire_dynamic_ipv6_conf(link);
648 if (r < 0)
649 return r;
650 }
651
652 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
653 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
654 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
655 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
656 * below will be called in radv_start(). */
657 r = dhcp_request_prefix_delegation(link);
658 if (r < 0)
659 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
660 }
661
662 if (link->lldp_tx) {
663 r = sd_lldp_tx_start(link->lldp_tx);
664 if (r < 0)
665 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
666 }
667
668 if (link->lldp_rx) {
669 r = sd_lldp_rx_start(link->lldp_rx);
670 if (r < 0)
671 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
672 }
673
674 return 0;
675 }
676
677 int link_ipv6ll_gained(Link *link) {
678 int r;
679
680 assert(link);
681
682 log_link_info(link, "Gained IPv6LL");
683
684 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
685 return 0;
686
687 r = link_acquire_dynamic_ipv6_conf(link);
688 if (r < 0)
689 return r;
690
691 link_check_ready(link);
692 return 0;
693 }
694
695 int link_handle_bound_to_list(Link *link) {
696 bool required_up = false;
697 bool link_is_up = false;
698 Link *l;
699
700 assert(link);
701
702 /* If at least one interface in bound_to_links has carrier, then make this interface up.
703 * If all interfaces in bound_to_links do not, then make this interface down. */
704
705 if (hashmap_isempty(link->bound_to_links))
706 return 0;
707
708 if (link->flags & IFF_UP)
709 link_is_up = true;
710
711 HASHMAP_FOREACH(l, link->bound_to_links)
712 if (link_has_carrier(l)) {
713 required_up = true;
714 break;
715 }
716
717 if (!required_up && link_is_up)
718 return link_request_to_bring_up_or_down(link, /* up = */ false);
719 if (required_up && !link_is_up)
720 return link_request_to_bring_up_or_down(link, /* up = */ true);
721
722 return 0;
723 }
724
725 static int link_handle_bound_by_list(Link *link) {
726 Link *l;
727 int r;
728
729 assert(link);
730
731 /* Update up or down state of interfaces which depend on this interface's carrier state. */
732
733 if (hashmap_isempty(link->bound_by_links))
734 return 0;
735
736 HASHMAP_FOREACH(l, link->bound_by_links) {
737 r = link_handle_bound_to_list(l);
738 if (r < 0)
739 return r;
740 }
741
742 return 0;
743 }
744
745 static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
746 int r;
747
748 assert(link);
749 assert(carrier);
750
751 if (link == carrier)
752 return 0;
753
754 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
755 return 0;
756
757 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
758 if (r < 0)
759 return r;
760
761 link_dirty(link);
762
763 return 0;
764 }
765
766 static int link_new_bound_by_list(Link *link) {
767 Manager *m;
768 Link *carrier;
769 int r;
770
771 assert(link);
772 assert(link->manager);
773
774 m = link->manager;
775
776 HASHMAP_FOREACH(carrier, m->links_by_index) {
777 if (!carrier->network)
778 continue;
779
780 if (strv_isempty(carrier->network->bind_carrier))
781 continue;
782
783 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
784 r = link_put_carrier(link, carrier, &link->bound_by_links);
785 if (r < 0)
786 return r;
787 }
788 }
789
790 HASHMAP_FOREACH(carrier, link->bound_by_links) {
791 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
792 if (r < 0)
793 return r;
794 }
795
796 return 0;
797 }
798
799 static int link_new_bound_to_list(Link *link) {
800 Manager *m;
801 Link *carrier;
802 int r;
803
804 assert(link);
805 assert(link->manager);
806
807 if (!link->network)
808 return 0;
809
810 if (strv_isempty(link->network->bind_carrier))
811 return 0;
812
813 m = link->manager;
814
815 HASHMAP_FOREACH(carrier, m->links_by_index) {
816 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
817 r = link_put_carrier(link, carrier, &link->bound_to_links);
818 if (r < 0)
819 return r;
820 }
821 }
822
823 HASHMAP_FOREACH(carrier, link->bound_to_links) {
824 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
825 if (r < 0)
826 return r;
827 }
828
829 return 0;
830 }
831
832 static void link_free_bound_to_list(Link *link) {
833 bool updated = false;
834 Link *bound_to;
835
836 assert(link);
837
838 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
839 updated = true;
840
841 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
842 link_dirty(bound_to);
843 }
844
845 if (updated)
846 link_dirty(link);
847 }
848
849 static void link_free_bound_by_list(Link *link) {
850 bool updated = false;
851 Link *bound_by;
852
853 assert(link);
854
855 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
856 updated = true;
857
858 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
859 link_dirty(bound_by);
860 link_handle_bound_to_list(bound_by);
861 }
862 }
863
864 if (updated)
865 link_dirty(link);
866 }
867
868 static int link_append_to_master(Link *link) {
869 Link *master;
870 int r;
871
872 assert(link);
873
874 /* - The link may have no master.
875 * - RTM_NEWLINK message about master interface may not be received yet. */
876 if (link_get_master(link, &master) < 0)
877 return 0;
878
879 r = set_ensure_put(&master->slaves, NULL, link);
880 if (r <= 0)
881 return r;
882
883 link_ref(link);
884 return 0;
885 }
886
887 static void link_drop_from_master(Link *link) {
888 Link *master;
889
890 assert(link);
891
892 if (!link->manager)
893 return;
894
895 if (link_get_master(link, &master) < 0)
896 return;
897
898 link_unref(set_remove(master->slaves, link));
899 }
900
901 static void link_drop_requests(Link *link) {
902 Request *req;
903
904 assert(link);
905 assert(link->manager);
906
907 ORDERED_SET_FOREACH(req, link->manager->request_queue)
908 if (req->link == link)
909 request_detach(link->manager, req);
910 }
911
912 static Link *link_drop(Link *link) {
913 char **n;
914
915 if (!link)
916 return NULL;
917
918 assert(link->manager);
919
920 link_set_state(link, LINK_STATE_LINGER);
921
922 /* Drop all references from other links and manager. Note that async netlink calls may have
923 * references to the link, and they will be dropped when we receive replies. */
924
925 link_drop_requests(link);
926
927 link_free_bound_to_list(link);
928 link_free_bound_by_list(link);
929
930 link_drop_from_master(link);
931
932 if (link->state_file)
933 (void) unlink(link->state_file);
934
935 link_clean(link);
936
937 STRV_FOREACH(n, link->alternative_names)
938 hashmap_remove(link->manager->links_by_name, *n);
939 hashmap_remove(link->manager->links_by_name, link->ifname);
940
941 /* bonding master and its slaves have the same hardware address. */
942 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
943
944 /* The following must be called at last. */
945 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
946 return link_unref(link);
947 }
948
949 static int link_drop_foreign_config(Link *link) {
950 int k, r;
951
952 assert(link);
953 assert(link->manager);
954
955 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
956 * to remove loopback address or addresses used for root NFS. */
957
958 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
959 return 0;
960 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
961 return 0;
962 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
963 return 0;
964
965 r = link_drop_foreign_routes(link);
966
967 k = link_drop_foreign_nexthops(link);
968 if (k < 0 && r >= 0)
969 r = k;
970
971 k = link_drop_foreign_addresses(link);
972 if (k < 0 && r >= 0)
973 r = k;
974
975 k = link_drop_foreign_neighbors(link);
976 if (k < 0 && r >= 0)
977 r = k;
978
979 k = manager_drop_foreign_routing_policy_rules(link->manager);
980 if (k < 0 && r >= 0)
981 r = k;
982
983 return r;
984 }
985
986 static int link_drop_managed_config(Link *link) {
987 int k, r;
988
989 assert(link);
990 assert(link->manager);
991
992 r = link_drop_managed_routes(link);
993
994 k = link_drop_managed_nexthops(link);
995 if (k < 0 && r >= 0)
996 r = k;
997
998 k = link_drop_managed_addresses(link);
999 if (k < 0 && r >= 0)
1000 r = k;
1001
1002 k = link_drop_managed_neighbors(link);
1003 if (k < 0 && r >= 0)
1004 r = k;
1005
1006 k = link_drop_managed_routing_policy_rules(link);
1007 if (k < 0 && r >= 0)
1008 r = k;
1009
1010 return r;
1011 }
1012
1013 static void link_foreignize_config(Link *link) {
1014 assert(link);
1015 assert(link->manager);
1016
1017 link_foreignize_routes(link);
1018 link_foreignize_nexthops(link);
1019 link_foreignize_addresses(link);
1020 link_foreignize_neighbors(link);
1021 link_foreignize_routing_policy_rules(link);
1022 }
1023
1024 static int link_configure(Link *link) {
1025 int r;
1026
1027 assert(link);
1028 assert(link->network);
1029 assert(link->state == LINK_STATE_INITIALIZED);
1030
1031 link_set_state(link, LINK_STATE_CONFIGURING);
1032
1033 r = link_new_bound_to_list(link);
1034 if (r < 0)
1035 return r;
1036
1037 r = link_request_traffic_control(link);
1038 if (r < 0)
1039 return r;
1040
1041 if (link->iftype == ARPHRD_CAN) {
1042 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1043 r = link_request_to_set_can(link);
1044 if (r < 0)
1045 return r;
1046
1047 return link_request_to_activate(link);
1048 }
1049
1050 r = link_configure_sr_iov(link);
1051 if (r < 0)
1052 return r;
1053
1054 r = link_set_sysctl(link);
1055 if (r < 0)
1056 return r;
1057
1058 r = link_request_to_set_mac(link, /* allow_retry = */ true);
1059 if (r < 0)
1060 return r;
1061
1062 r = link_request_to_set_ipoib(link);
1063 if (r < 0)
1064 return r;
1065
1066 r = link_request_to_set_flags(link);
1067 if (r < 0)
1068 return r;
1069
1070 r = link_request_to_set_group(link);
1071 if (r < 0)
1072 return r;
1073
1074 r = link_configure_mtu(link);
1075 if (r < 0)
1076 return r;
1077
1078 r = link_request_to_set_addrgen_mode(link);
1079 if (r < 0)
1080 return r;
1081
1082 r = link_request_to_set_master(link);
1083 if (r < 0)
1084 return r;
1085
1086 r = link_request_stacked_netdevs(link);
1087 if (r < 0)
1088 return r;
1089
1090 r = link_request_to_set_bond(link);
1091 if (r < 0)
1092 return r;
1093
1094 r = link_request_to_set_bridge(link);
1095 if (r < 0)
1096 return r;
1097
1098 r = link_request_to_set_bridge_vlan(link);
1099 if (r < 0)
1100 return r;
1101
1102 r = link_request_to_activate(link);
1103 if (r < 0)
1104 return r;
1105
1106 r = ipv4ll_configure(link);
1107 if (r < 0)
1108 return r;
1109
1110 r = link_request_dhcp4_client(link);
1111 if (r < 0)
1112 return r;
1113
1114 r = link_request_dhcp6_client(link);
1115 if (r < 0)
1116 return r;
1117
1118 r = link_request_ndisc(link);
1119 if (r < 0)
1120 return r;
1121
1122 r = link_request_dhcp_server(link);
1123 if (r < 0)
1124 return r;
1125
1126 r = link_request_radv(link);
1127 if (r < 0)
1128 return r;
1129
1130 r = link_lldp_rx_configure(link);
1131 if (r < 0)
1132 return r;
1133
1134 r = link_lldp_tx_configure(link);
1135 if (r < 0)
1136 return r;
1137
1138 r = link_drop_foreign_config(link);
1139 if (r < 0)
1140 return r;
1141
1142 r = link_request_static_configs(link);
1143 if (r < 0)
1144 return r;
1145
1146 if (!link_has_carrier(link))
1147 return 0;
1148
1149 return link_acquire_dynamic_conf(link);
1150 }
1151
1152 static int link_get_network(Link *link, Network **ret) {
1153 Network *network;
1154 int r;
1155
1156 assert(link);
1157 assert(link->manager);
1158 assert(ret);
1159
1160 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1161 bool warn = false;
1162
1163 r = net_match_config(
1164 &network->match,
1165 link->sd_device,
1166 &link->hw_addr,
1167 &link->permanent_hw_addr,
1168 link->driver,
1169 link->iftype,
1170 link->kind,
1171 link->ifname,
1172 link->alternative_names,
1173 link->wlan_iftype,
1174 link->ssid,
1175 &link->bssid);
1176 if (r < 0)
1177 return r;
1178 if (r == 0)
1179 continue;
1180
1181 if (network->match.ifname && link->sd_device) {
1182 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1183 const char *attr;
1184
1185 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1186 (void) safe_atou8(attr, &name_assign_type);
1187
1188 warn = name_assign_type == NET_NAME_ENUM;
1189 }
1190
1191 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1192 "found matching network '%s'%s.",
1193 network->filename,
1194 warn ? ", based on potentially unpredictable interface name" : "");
1195
1196 if (network->unmanaged)
1197 return -ENOENT;
1198
1199 *ret = network;
1200 return 0;
1201 }
1202
1203 return -ENOENT;
1204 }
1205
1206 static int link_reconfigure_impl(Link *link, bool force) {
1207 Network *network = NULL;
1208 NetDev *netdev = NULL;
1209 int r;
1210
1211 assert(link);
1212
1213 if (!IN_SET(link->state, LINK_STATE_INITIALIZED, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
1214 return 0;
1215
1216 r = netdev_get(link->manager, link->ifname, &netdev);
1217 if (r < 0 && r != -ENOENT)
1218 return r;
1219
1220 r = link_get_network(link, &network);
1221 if (r < 0 && r != -ENOENT)
1222 return r;
1223
1224 if (link->state != LINK_STATE_UNMANAGED && !network)
1225 /* If link is in initialized state, then link->network is also NULL. */
1226 force = true;
1227
1228 if (link->network == network && !force)
1229 return 0;
1230
1231 if (network) {
1232 if (link->state == LINK_STATE_INITIALIZED)
1233 log_link_info(link, "Configuring with %s.", network->filename);
1234 else
1235 log_link_info(link, "Reconfiguring with %s.", network->filename);
1236 } else
1237 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1238 "Unmanaging interface.");
1239
1240 /* Dropping old .network file */
1241 r = link_stop_engines(link, false);
1242 if (r < 0)
1243 return r;
1244
1245 link_drop_requests(link);
1246
1247 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
1248 /* When a new/updated .network file is assigned, first make all configs (addresses,
1249 * routes, and so on) foreign, and then drop unnecessary configs later by
1250 * link_drop_foreign_config() in link_configure().
1251 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1252 * here we need to drop the configs such as addresses, routes, and so on configured by
1253 * the previously assigned .network file. */
1254 link_foreignize_config(link);
1255 else {
1256 /* Remove all managed configs. Note, foreign configs are removed in later by
1257 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1258 r = link_drop_managed_config(link);
1259 if (r < 0)
1260 return r;
1261 }
1262
1263 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1264 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1265 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1266 * map here, as it depends on .network files assigned to other links. */
1267 link_free_bound_to_list(link);
1268
1269 link_free_engines(link);
1270 link->network = network_unref(link->network);
1271
1272 netdev_unref(link->netdev);
1273 link->netdev = netdev_ref(netdev);
1274
1275 if (!network) {
1276 link_set_state(link, LINK_STATE_UNMANAGED);
1277 return 0;
1278 }
1279
1280 /* Then, apply new .network file */
1281 link->network = network_ref(network);
1282 link_update_operstate(link, true);
1283 link_dirty(link);
1284
1285 link_set_state(link, LINK_STATE_INITIALIZED);
1286 link->activated = false;
1287
1288 r = link_configure(link);
1289 if (r < 0)
1290 return r;
1291
1292 return 1;
1293 }
1294
1295 static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
1296 int r;
1297
1298 assert(link);
1299
1300 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1301 if (r <= 0)
1302 return r;
1303
1304 r = link_reconfigure_impl(link, force);
1305 if (r < 0) {
1306 link_enter_failed(link);
1307 return 0;
1308 }
1309
1310 return r;
1311 }
1312
1313 static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1314 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
1315 }
1316
1317 static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1318 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
1319 }
1320
1321 static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1322 int r;
1323
1324 assert(link);
1325
1326 r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
1327 if (r != 0)
1328 return r;
1329
1330 /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */
1331 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
1332 return 0;
1333
1334 /* re-request static configs, and restart engines. */
1335 r = link_stop_engines(link, false);
1336 if (r < 0) {
1337 link_enter_failed(link);
1338 return 0;
1339 }
1340
1341 r = link_acquire_dynamic_conf(link);
1342 if (r < 0) {
1343 link_enter_failed(link);
1344 return 0;
1345 }
1346
1347 r = link_request_static_configs(link);
1348 if (r < 0) {
1349 link_enter_failed(link);
1350 return 0;
1351 }
1352
1353 return 0;
1354 }
1355
1356 static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) {
1357 int r;
1358
1359 assert(link);
1360 assert(callback);
1361
1362 /* When link in pending or initialized state, then link_configure() will be called. To prevent
1363 * the function from being called multiple times simultaneously, refuse to reconfigure the
1364 * interface in these cases. */
1365 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
1366 return 0; /* 0 means no-op. */
1367
1368 r = link_call_getlink(link, callback);
1369 if (r < 0)
1370 return r;
1371
1372 return 1; /* 1 means the interface will be reconfigured. */
1373 }
1374
1375 int link_reconfigure(Link *link, bool force) {
1376 return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
1377 }
1378
1379 int link_reconfigure_after_sleep(Link *link) {
1380 return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler);
1381 }
1382
1383 static int link_initialized_and_synced(Link *link) {
1384 int r;
1385
1386 assert(link);
1387 assert(link->manager);
1388
1389 if (link->manager->test_mode) {
1390 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1391 link_set_state(link, LINK_STATE_UNMANAGED);
1392 return 0;
1393 }
1394
1395 /* This may get called either from the asynchronous netlink callback,
1396 * or directly from link_check_initialized() if running in a container. */
1397 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
1398 return 0;
1399
1400 log_link_debug(link, "Link state is up-to-date");
1401 link_set_state(link, LINK_STATE_INITIALIZED);
1402
1403 r = link_new_bound_by_list(link);
1404 if (r < 0)
1405 return r;
1406
1407 r = link_handle_bound_by_list(link);
1408 if (r < 0)
1409 return r;
1410
1411 return link_reconfigure_impl(link, /* force = */ false);
1412 }
1413
1414 static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1415 int r;
1416
1417 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1418 if (r <= 0)
1419 return r;
1420
1421 r = link_initialized_and_synced(link);
1422 if (r < 0)
1423 link_enter_failed(link);
1424
1425 return 0;
1426 }
1427
1428 static int link_initialized(Link *link, sd_device *device) {
1429 assert(link);
1430 assert(device);
1431
1432 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1433 * or sysattrs) may be outdated. */
1434 sd_device_ref(device);
1435 sd_device_unref(link->sd_device);
1436 link->sd_device = device;
1437
1438 /* Do not ignore unamanaged state case here. If an interface is renamed after being once
1439 * configured, and the corresponding .network file has Name= in [Match] section, then the
1440 * interface may be already in unmanaged state. See #20657. */
1441 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED))
1442 return 0;
1443
1444 log_link_debug(link, "udev initialized link");
1445 link_set_state(link, LINK_STATE_INITIALIZED);
1446
1447 /* udev has initialized the link, but we don't know if we have yet
1448 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1449 * when it returns we know that the pending NEWLINKs have already been
1450 * processed and that we are up-to-date */
1451
1452 return link_call_getlink(link, link_initialized_handler);
1453 }
1454
1455 static int link_check_initialized(Link *link) {
1456 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
1457 int r;
1458
1459 assert(link);
1460
1461 if (!udev_available())
1462 return link_initialized_and_synced(link);
1463
1464 /* udev should be around */
1465 r = sd_device_new_from_ifindex(&device, link->ifindex);
1466 if (r < 0) {
1467 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1468 return 0;
1469 }
1470
1471 r = sd_device_get_is_initialized(device);
1472 if (r < 0)
1473 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
1474 if (r == 0) {
1475 /* not yet ready */
1476 log_link_debug(link, "link pending udev initialization...");
1477 return 0;
1478 }
1479
1480 r = device_is_renaming(device);
1481 if (r < 0)
1482 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
1483 if (r > 0) {
1484 log_link_debug(link, "Interface is being renamed, pending initialization.");
1485 return 0;
1486 }
1487
1488 return link_initialized(link, device);
1489 }
1490
1491 int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
1492 sd_device_action_t action;
1493 Manager *m = userdata;
1494 Link *link = NULL;
1495 int r, ifindex;
1496
1497 assert(m);
1498 assert(device);
1499
1500 r = sd_device_get_action(device, &action);
1501 if (r < 0) {
1502 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
1503 return 0;
1504 }
1505
1506 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
1507 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
1508 * still exists — and we are interested in that. */
1509 if (action == SD_DEVICE_REMOVE)
1510 return 0;
1511
1512 r = sd_device_get_ifindex(device, &ifindex);
1513 if (r < 0) {
1514 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
1515 device_action_to_string(action));
1516 return 0;
1517 }
1518
1519 r = device_is_renaming(device);
1520 if (r < 0) {
1521 log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
1522 device_action_to_string(action));
1523 return 0;
1524 }
1525 if (r > 0) {
1526 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
1527 return 0;
1528 }
1529
1530 r = link_get_by_index(m, ifindex, &link);
1531 if (r < 0) {
1532 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1533 return 0;
1534 }
1535
1536 r = link_initialized(link, device);
1537 if (r < 0)
1538 link_enter_failed(link);
1539
1540 return 0;
1541 }
1542
1543 static int link_carrier_gained(Link *link) {
1544 bool force_reconfigure;
1545 int r;
1546
1547 assert(link);
1548
1549 r = event_source_disable(link->carrier_lost_timer);
1550 if (r < 0)
1551 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1552
1553 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1554 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1555 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1556 * restarted, and the correct network information will be gained.
1557 *
1558 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1559 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1560 * already assigned to the interface (in that case, the .network file does not have the SSID=
1561 * setting in the [Match] section), and the interface is already being configured. Of course,
1562 * there may exist another .network file with higher priority and a matching SSID= setting. But
1563 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1564 *
1565 * For non-wireless interfaces, we have no way to detect the connected network change. So,
1566 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1567 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
1568 link->previous_ssid = mfree(link->previous_ssid);
1569
1570 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
1571 /* At this stage, both wlan and link information should be up-to-date. Hence,
1572 * it is not necessary to call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or
1573 * NL80211_CMD_GET_STATION commands, and simply call link_reconfigure_impl().
1574 * Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1575 r = link_reconfigure_impl(link, force_reconfigure);
1576 if (r != 0)
1577 return r;
1578 }
1579
1580 r = link_handle_bound_by_list(link);
1581 if (r < 0)
1582 return r;
1583
1584 if (link->iftype == ARPHRD_CAN)
1585 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1586 return 0;
1587
1588 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
1589 r = link_acquire_dynamic_conf(link);
1590 if (r < 0)
1591 return r;
1592
1593 r = link_request_static_configs(link);
1594 if (r < 0)
1595 return r;
1596 }
1597
1598 return 0;
1599 }
1600
1601 static int link_carrier_lost_impl(Link *link) {
1602 int r, ret = 0;
1603
1604 assert(link);
1605
1606 link->previous_ssid = mfree(link->previous_ssid);
1607
1608 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1609 return 0;
1610
1611 if (!link->network)
1612 return 0;
1613
1614 r = link_stop_engines(link, false);
1615 if (r < 0)
1616 ret = r;
1617
1618 r = link_drop_managed_config(link);
1619 if (r < 0 && ret >= 0)
1620 ret = r;
1621
1622 return ret;
1623 }
1624
1625 static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
1626 Link *link = userdata;
1627 int r;
1628
1629 assert(link);
1630
1631 r = link_carrier_lost_impl(link);
1632 if (r < 0) {
1633 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1634 link_enter_failed(link);
1635 }
1636
1637 return 0;
1638 }
1639
1640 static int link_carrier_lost(Link *link) {
1641 int r;
1642
1643 assert(link);
1644
1645 r = link_handle_bound_by_list(link);
1646 if (r < 0)
1647 return r;
1648
1649 if (link->iftype == ARPHRD_CAN)
1650 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1651 return 0;
1652
1653 if (!link->network)
1654 return 0;
1655
1656 if (link->network->ignore_carrier_loss_usec == USEC_INFINITY)
1657 return 0;
1658
1659 if (link->network->ignore_carrier_loss_usec == 0)
1660 return link_carrier_lost_impl(link);
1661
1662 return event_reset_time_relative(link->manager->event,
1663 &link->carrier_lost_timer,
1664 clock_boottime_or_monotonic(),
1665 link->network->ignore_carrier_loss_usec,
1666 0,
1667 link_carrier_lost_handler,
1668 link,
1669 0,
1670 "link-carrier-loss",
1671 true);
1672 }
1673
1674 static int link_admin_state_up(Link *link) {
1675 int r;
1676
1677 assert(link);
1678
1679 /* This is called every time an interface admin state changes to up;
1680 * specifically, when IFF_UP flag changes from unset to set. */
1681
1682 if (!link->network)
1683 return 0;
1684
1685 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1686 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
1687 return link_request_to_bring_up_or_down(link, /* up = */ false);
1688 }
1689
1690 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1691 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1692 r = link_set_ipv6_mtu(link);
1693 if (r < 0)
1694 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1695
1696 return 0;
1697 }
1698
1699 static int link_admin_state_down(Link *link) {
1700 assert(link);
1701
1702 if (!link->network)
1703 return 0;
1704
1705 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1706 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
1707 return link_request_to_bring_up_or_down(link, /* up = */ true);
1708 }
1709
1710 return 0;
1711 }
1712
1713 static bool link_is_enslaved(Link *link) {
1714 if (link->flags & IFF_SLAVE)
1715 return true;
1716
1717 if (link->master_ifindex > 0)
1718 return true;
1719
1720 return false;
1721 }
1722
1723 static LinkAddressState address_state_from_scope(uint8_t scope) {
1724 if (scope < RT_SCOPE_SITE)
1725 /* universally accessible addresses found */
1726 return LINK_ADDRESS_STATE_ROUTABLE;
1727
1728 if (scope < RT_SCOPE_HOST)
1729 /* only link or site local addresses found */
1730 return LINK_ADDRESS_STATE_DEGRADED;
1731
1732 /* no useful addresses found */
1733 return LINK_ADDRESS_STATE_OFF;
1734 }
1735
1736 void link_update_operstate(Link *link, bool also_update_master) {
1737 LinkOperationalState operstate;
1738 LinkCarrierState carrier_state;
1739 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1740 LinkOnlineState online_state;
1741 _cleanup_strv_free_ char **p = NULL;
1742 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1743 bool changed = false;
1744 Address *address;
1745
1746 assert(link);
1747
1748 if (link->kernel_operstate == IF_OPER_DORMANT)
1749 carrier_state = LINK_CARRIER_STATE_DORMANT;
1750 else if (link_has_carrier(link)) {
1751 if (link_is_enslaved(link))
1752 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1753 else
1754 carrier_state = LINK_CARRIER_STATE_CARRIER;
1755 } else if (link->flags & IFF_UP)
1756 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1757 else
1758 carrier_state = LINK_CARRIER_STATE_OFF;
1759
1760 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1761 Link *slave;
1762
1763 SET_FOREACH(slave, link->slaves) {
1764 link_update_operstate(slave, false);
1765
1766 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1767 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1768 }
1769 }
1770
1771 SET_FOREACH(address, link->addresses) {
1772 if (!address_is_ready(address))
1773 continue;
1774
1775 if (address->family == AF_INET)
1776 ipv4_scope = MIN(ipv4_scope, address->scope);
1777
1778 if (address->family == AF_INET6)
1779 ipv6_scope = MIN(ipv6_scope, address->scope);
1780 }
1781
1782 ipv4_address_state = address_state_from_scope(ipv4_scope);
1783 ipv6_address_state = address_state_from_scope(ipv6_scope);
1784 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1785
1786 /* Mapping of address and carrier state vs operational state
1787 * carrier state
1788 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1789 * ------------------------------------------------------------------------------
1790 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1791 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1792 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1793 */
1794
1795 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1796 operstate = (LinkOperationalState) carrier_state;
1797 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1798 operstate = LINK_OPERSTATE_ROUTABLE;
1799 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1800 operstate = LINK_OPERSTATE_DEGRADED;
1801 else
1802 operstate = LINK_OPERSTATE_ENSLAVED;
1803
1804 /* Only determine online state for managed links with RequiredForOnline=yes */
1805 if (!link->network || !link->network->required_for_online)
1806 online_state = _LINK_ONLINE_STATE_INVALID;
1807 else if (operstate < link->network->required_operstate_for_online.min ||
1808 operstate > link->network->required_operstate_for_online.max)
1809 online_state = LINK_ONLINE_STATE_OFFLINE;
1810 else {
1811 AddressFamily required_family = link->network->required_family_for_online;
1812 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1813 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1814
1815 /* The operational state is within the range required for online.
1816 * If a particular address family is also required, we might revert
1817 * to offline in the blocks below. */
1818 online_state = LINK_ONLINE_STATE_ONLINE;
1819
1820 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1821 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1822 online_state = LINK_ONLINE_STATE_OFFLINE;
1823 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1824 online_state = LINK_ONLINE_STATE_OFFLINE;
1825 }
1826
1827 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1828 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1829 online_state = LINK_ONLINE_STATE_OFFLINE;
1830 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1831 online_state = LINK_ONLINE_STATE_OFFLINE;
1832 }
1833 }
1834
1835 if (link->carrier_state != carrier_state) {
1836 link->carrier_state = carrier_state;
1837 changed = true;
1838 if (strv_extend(&p, "CarrierState") < 0)
1839 log_oom();
1840 }
1841
1842 if (link->address_state != address_state) {
1843 link->address_state = address_state;
1844 changed = true;
1845 if (strv_extend(&p, "AddressState") < 0)
1846 log_oom();
1847 }
1848
1849 if (link->ipv4_address_state != ipv4_address_state) {
1850 link->ipv4_address_state = ipv4_address_state;
1851 changed = true;
1852 if (strv_extend(&p, "IPv4AddressState") < 0)
1853 log_oom();
1854 }
1855
1856 if (link->ipv6_address_state != ipv6_address_state) {
1857 link->ipv6_address_state = ipv6_address_state;
1858 changed = true;
1859 if (strv_extend(&p, "IPv6AddressState") < 0)
1860 log_oom();
1861 }
1862
1863 if (link->operstate != operstate) {
1864 link->operstate = operstate;
1865 changed = true;
1866 if (strv_extend(&p, "OperationalState") < 0)
1867 log_oom();
1868 }
1869
1870 if (link->online_state != online_state) {
1871 link->online_state = online_state;
1872 changed = true;
1873 if (strv_extend(&p, "OnlineState") < 0)
1874 log_oom();
1875 }
1876
1877 if (p)
1878 link_send_changed_strv(link, p);
1879 if (changed)
1880 link_dirty(link);
1881
1882 if (also_update_master) {
1883 Link *master;
1884
1885 if (link_get_master(link, &master) >= 0)
1886 link_update_operstate(master, true);
1887 }
1888 }
1889
1890 #define FLAG_STRING(string, flag, old, new) \
1891 (((old ^ new) & flag) \
1892 ? ((old & flag) ? (" -" string) : (" +" string)) \
1893 : "")
1894
1895 static int link_update_flags(Link *link, sd_netlink_message *message) {
1896 bool link_was_admin_up, had_carrier;
1897 uint8_t operstate;
1898 unsigned flags;
1899 int r;
1900
1901 assert(link);
1902 assert(message);
1903
1904 r = sd_rtnl_message_link_get_flags(message, &flags);
1905 if (r < 0)
1906 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
1907
1908 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1909 if (r == -ENODATA)
1910 /* If we got a message without operstate, assume the state was unchanged. */
1911 operstate = link->kernel_operstate;
1912 else if (r < 0)
1913 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
1914
1915 if (link->flags == flags && link->kernel_operstate == operstate)
1916 return 0;
1917
1918 if (link->flags != flags) {
1919 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
1920
1921 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",
1922 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1923 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1924 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1925 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1926 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1927 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1928 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1929 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1930 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1931 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1932 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1933 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1934 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1935 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1936 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1937 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1938 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1939 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1940 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
1941
1942 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1943 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1944 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1945 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1946 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1947 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1948 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1949 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
1950
1951 if (unknown_flags_added)
1952 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
1953
1954 if (unknown_flags_removed)
1955 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1956 }
1957
1958 link_was_admin_up = link->flags & IFF_UP;
1959 had_carrier = link_has_carrier(link);
1960
1961 link->flags = flags;
1962 link->kernel_operstate = operstate;
1963
1964 link_update_operstate(link, true);
1965
1966 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1967 log_link_info(link, "Link UP");
1968
1969 r = link_admin_state_up(link);
1970 if (r < 0)
1971 return r;
1972 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1973 log_link_info(link, "Link DOWN");
1974
1975 r = link_admin_state_down(link);
1976 if (r < 0)
1977 return r;
1978 }
1979
1980 if (!had_carrier && link_has_carrier(link)) {
1981 log_link_info(link, "Gained carrier");
1982
1983 r = link_carrier_gained(link);
1984 if (r < 0)
1985 return r;
1986 } else if (had_carrier && !link_has_carrier(link)) {
1987 log_link_info(link, "Lost carrier");
1988
1989 r = link_carrier_lost(link);
1990 if (r < 0)
1991 return r;
1992 }
1993
1994 return 0;
1995 }
1996
1997 static int link_update_master(Link *link, sd_netlink_message *message) {
1998 int master_ifindex, r;
1999
2000 assert(link);
2001 assert(message);
2002
2003 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2004 if (r == -ENODATA)
2005 return 0;
2006 if (r < 0)
2007 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
2008
2009 if (master_ifindex == link->ifindex)
2010 master_ifindex = 0;
2011
2012 if (master_ifindex == link->master_ifindex)
2013 return 0;
2014
2015 if (link->master_ifindex == 0)
2016 log_link_debug(link, "Joined to master interface: %i", master_ifindex);
2017 else if (master_ifindex == 0)
2018 log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex);
2019 else
2020 log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex);
2021
2022 link_drop_from_master(link);
2023
2024 link->master_ifindex = master_ifindex;
2025
2026 r = link_append_to_master(link);
2027 if (r < 0)
2028 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
2029
2030 return 0;
2031 }
2032
2033 static int link_update_driver(Link *link, sd_netlink_message *message) {
2034 int r;
2035
2036 assert(link);
2037 assert(link->manager);
2038 assert(message);
2039
2040 /* Driver is already read. Assuming the driver is never changed. */
2041 if (link->driver)
2042 return 0;
2043
2044 /* When udevd is running, read the driver after the interface is initialized by udevd.
2045 * Otherwise, ethtool may not work correctly. See issue #22538.
2046 * When udevd is not running, read the value when the interface is detected. */
2047 if (link->state != (udev_available() ? LINK_STATE_INITIALIZED : LINK_STATE_PENDING))
2048 return 0;
2049
2050 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2051 if (r < 0) {
2052 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2053 return 0;
2054 }
2055
2056 log_link_debug(link, "Found driver: %s", strna(link->driver));
2057
2058 if (streq_ptr(link->driver, "dsa")) {
2059 uint32_t dsa_master_ifindex = 0;
2060
2061 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2062 if (r < 0 && r != -ENODATA)
2063 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2064
2065 if (dsa_master_ifindex > INT_MAX) {
2066 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2067 dsa_master_ifindex);
2068 dsa_master_ifindex = 0;
2069 }
2070
2071 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2072 }
2073
2074 return 0;
2075 }
2076
2077 static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2078 int r;
2079
2080 assert(link);
2081 assert(link->manager);
2082 assert(message);
2083
2084 if (link->permanent_hw_addr.length > 0)
2085 return 0;
2086
2087 /* When udevd is running, read the permanent hardware address after the interface is
2088 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2089 * When udevd is not running, read the value when the interface is detected. */
2090 if (link->state != (udev_available() ? LINK_STATE_INITIALIZED : LINK_STATE_PENDING))
2091 return 0;
2092
2093 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2094 if (r < 0) {
2095 if (r != -ENODATA)
2096 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2097
2098 if (netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL) >= 0) {
2099 /* Fallback to ethtool, if the link has a hardware address. */
2100 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2101 if (r < 0)
2102 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2103 }
2104 }
2105
2106 if (link->permanent_hw_addr.length > 0)
2107 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2108
2109 return 0;
2110 }
2111
2112 static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
2113 struct hw_addr_data addr;
2114 int r;
2115
2116 assert(link);
2117 assert(message);
2118
2119 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2120 if (r < 0 && r != -ENODATA)
2121 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
2122
2123 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
2124 if (r == -ENODATA)
2125 return 0;
2126 if (r < 0)
2127 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
2128
2129 if (hw_addr_equal(&link->hw_addr, &addr))
2130 return 0;
2131
2132 if (link->hw_addr.length == 0)
2133 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
2134 else {
2135 log_link_debug(link, "Hardware address is changed: %s → %s",
2136 HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr));
2137
2138 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
2139 }
2140
2141 link->hw_addr = addr;
2142
2143 if (!hw_addr_is_null(&link->hw_addr)) {
2144 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2145 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2146 /* bonding master and its slaves have the same hardware address. */
2147 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2148 if (r < 0)
2149 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2150 }
2151
2152 r = ipv4ll_update_mac(link);
2153 if (r < 0)
2154 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2155
2156 r = ipv4ll_update_mac(link);
2157 if (r < 0)
2158 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
2159
2160 r = dhcp4_update_mac(link);
2161 if (r < 0)
2162 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
2163
2164 r = dhcp6_update_mac(link);
2165 if (r < 0)
2166 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2167
2168 r = radv_update_mac(link);
2169 if (r < 0)
2170 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2171
2172 if (link->ndisc) {
2173 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
2174 if (r < 0)
2175 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2176 }
2177
2178 if (link->lldp_rx) {
2179 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
2180 if (r < 0)
2181 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2182 }
2183
2184 if (link->lldp_tx) {
2185 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2186 if (r < 0)
2187 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
2188 }
2189
2190 return 0;
2191 }
2192
2193 static int link_update_mtu(Link *link, sd_netlink_message *message) {
2194 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
2195 int r;
2196
2197 assert(link);
2198 assert(message);
2199
2200 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2201 if (r == -ENODATA)
2202 return 0;
2203 if (r < 0)
2204 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
2205 if (mtu == 0)
2206 return 0;
2207
2208 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2209 if (r < 0 && r != -ENODATA)
2210 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2211
2212 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2213 if (r < 0 && r != -ENODATA)
2214 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2215
2216 if (max_mtu == 0)
2217 max_mtu = UINT32_MAX;
2218
2219 link->min_mtu = min_mtu;
2220 link->max_mtu = max_mtu;
2221
2222 if (link->original_mtu == 0) {
2223 link->original_mtu = mtu;
2224 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2225 link->original_mtu, link->min_mtu, link->max_mtu);
2226 }
2227
2228 if (link->mtu == mtu)
2229 return 0;
2230
2231 if (link->mtu != 0)
2232 log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2233 link->mtu, mtu, link->min_mtu, link->max_mtu);
2234
2235 link->mtu = mtu;
2236
2237 if (link->dhcp_client) {
2238 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
2239 if (r < 0)
2240 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2241 }
2242
2243 if (link->radv) {
2244 r = sd_radv_set_mtu(link->radv, link->mtu);
2245 if (r < 0)
2246 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2247 }
2248
2249 return 0;
2250 }
2251
2252 static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2253 _cleanup_strv_free_ char **altnames = NULL;
2254 char **n;
2255 int r;
2256
2257 assert(link);
2258 assert(message);
2259
2260 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2261 if (r == -ENODATA)
2262 /* The message does not have IFLA_PROP_LIST container attribute. It does not means the
2263 * interface has no alternative name. */
2264 return 0;
2265 if (r < 0)
2266 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2267
2268 if (strv_equal(altnames, link->alternative_names))
2269 return 0;
2270
2271 STRV_FOREACH(n, link->alternative_names)
2272 hashmap_remove(link->manager->links_by_name, *n);
2273
2274 strv_free_and_replace(link->alternative_names, altnames);
2275
2276 STRV_FOREACH(n, link->alternative_names) {
2277 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2278 if (r < 0)
2279 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2280 }
2281
2282 return 0;
2283 }
2284
2285 static int link_update_name(Link *link, sd_netlink_message *message) {
2286 char ifname_from_index[IF_NAMESIZE];
2287 const char *ifname;
2288 int r;
2289
2290 assert(link);
2291 assert(message);
2292
2293 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2294 if (r == -ENODATA)
2295 /* Hmm?? But ok. */
2296 return 0;
2297 if (r < 0)
2298 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2299
2300 if (streq(ifname, link->ifname))
2301 return 0;
2302
2303 r = format_ifname(link->ifindex, ifname_from_index);
2304 if (r < 0)
2305 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
2306
2307 if (!streq(ifname, ifname_from_index)) {
2308 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2309 "with the name currently configured on the actual interface '%s'. Ignoring.",
2310 ifname, ifname_from_index);
2311 return 0;
2312 }
2313
2314 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2315
2316 hashmap_remove(link->manager->links_by_name, link->ifname);
2317
2318 r = free_and_strdup(&link->ifname, ifname);
2319 if (r < 0)
2320 return log_oom_debug();
2321
2322 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2323 if (r < 0)
2324 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2325
2326 if (link->dhcp_client) {
2327 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2328 if (r < 0)
2329 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2330 }
2331
2332 if (link->dhcp6_client) {
2333 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2334 if (r < 0)
2335 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2336 }
2337
2338 if (link->ndisc) {
2339 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2340 if (r < 0)
2341 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2342 }
2343
2344 if (link->dhcp_server) {
2345 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2346 if (r < 0)
2347 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2348 }
2349
2350 if (link->radv) {
2351 r = sd_radv_set_ifname(link->radv, link->ifname);
2352 if (r < 0)
2353 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2354 }
2355
2356 if (link->lldp_rx) {
2357 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
2358 if (r < 0)
2359 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2360 }
2361
2362 if (link->lldp_tx) {
2363 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2364 if (r < 0)
2365 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
2366 }
2367
2368 if (link->ipv4ll) {
2369 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2370 if (r < 0)
2371 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2372 }
2373
2374 r = ipv4acd_set_ifname(link);
2375 if (r < 0)
2376 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
2377
2378 return 0;
2379 }
2380
2381 static int link_update(Link *link, sd_netlink_message *message) {
2382 int r;
2383
2384 assert(link);
2385 assert(message);
2386
2387 r = link_update_name(link, message);
2388 if (r < 0)
2389 return r;
2390
2391 r = link_update_alternative_names(link, message);
2392 if (r < 0)
2393 return r;
2394
2395 r = link_update_mtu(link, message);
2396 if (r < 0)
2397 return r;
2398
2399 r = link_update_driver(link, message);
2400 if (r < 0)
2401 return r;
2402
2403 r = link_update_permanent_hardware_address(link, message);
2404 if (r < 0)
2405 return r;
2406
2407 r = link_update_hardware_address(link, message);
2408 if (r < 0)
2409 return r;
2410
2411 r = link_update_master(link, message);
2412 if (r < 0)
2413 return r;
2414
2415 r = link_update_ipv6ll_addrgen_mode(link, message);
2416 if (r < 0)
2417 return r;
2418
2419 return link_update_flags(link, message);
2420 }
2421
2422 static Link *link_drop_or_unref(Link *link) {
2423 if (!link)
2424 return NULL;
2425 if (!link->manager)
2426 return link_unref(link);
2427 return link_drop(link);
2428 }
2429
2430 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2431
2432 static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2433 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
2434 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2435 unsigned short iftype;
2436 int r, ifindex;
2437
2438 assert(manager);
2439 assert(message);
2440 assert(ret);
2441
2442 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2443 if (r < 0)
2444 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
2445 else if (ifindex <= 0)
2446 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
2447
2448 r = sd_rtnl_message_link_get_type(message, &iftype);
2449 if (r < 0)
2450 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
2451
2452 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2453 if (r < 0)
2454 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
2455
2456 /* check for link kind */
2457 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2458 if (r >= 0) {
2459 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2460 if (r < 0 && r != -ENODATA)
2461 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
2462 r = sd_netlink_message_exit_container(message);
2463 if (r < 0)
2464 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
2465 }
2466
2467 if (!manager->test_mode) {
2468 /* Do not update state files when running in test mode. */
2469 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2470 return log_oom_debug();
2471
2472 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2473 return log_oom_debug();
2474
2475 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2476 return log_oom_debug();
2477 }
2478
2479 link = new(Link, 1);
2480 if (!link)
2481 return -ENOMEM;
2482
2483 *link = (Link) {
2484 .n_ref = 1,
2485 .state = LINK_STATE_PENDING,
2486 .online_state = _LINK_ONLINE_STATE_INVALID,
2487 .ifindex = ifindex,
2488 .iftype = iftype,
2489 .ifname = TAKE_PTR(ifname),
2490 .kind = TAKE_PTR(kind),
2491
2492 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2493
2494 .state_file = TAKE_PTR(state_file),
2495 .lease_file = TAKE_PTR(lease_file),
2496 .lldp_file = TAKE_PTR(lldp_file),
2497
2498 .n_dns = UINT_MAX,
2499 .dns_default_route = -1,
2500 .llmnr = _RESOLVE_SUPPORT_INVALID,
2501 .mdns = _RESOLVE_SUPPORT_INVALID,
2502 .dnssec_mode = _DNSSEC_MODE_INVALID,
2503 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2504 };
2505
2506 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
2507 if (r < 0)
2508 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
2509
2510 link->manager = manager;
2511
2512 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2513 if (r < 0)
2514 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
2515
2516 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2517 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2518
2519 *ret = TAKE_PTR(link);
2520 return 0;
2521 }
2522
2523 int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
2524 Link *link = NULL;
2525 NetDev *netdev = NULL;
2526 uint16_t type;
2527 const char *name;
2528 int r, ifindex;
2529
2530 assert(rtnl);
2531 assert(message);
2532 assert(manager);
2533
2534 if (sd_netlink_message_is_error(message)) {
2535 r = sd_netlink_message_get_errno(message);
2536 if (r < 0)
2537 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2538
2539 return 0;
2540 }
2541
2542 r = sd_netlink_message_get_type(message, &type);
2543 if (r < 0) {
2544 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2545 return 0;
2546 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2547 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2548 return 0;
2549 }
2550
2551 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2552 if (r < 0) {
2553 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2554 return 0;
2555 } else if (ifindex <= 0) {
2556 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2557 return 0;
2558 }
2559
2560 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2561 if (r < 0) {
2562 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2563 return 0;
2564 }
2565
2566 (void) link_get_by_index(manager, ifindex, &link);
2567 (void) netdev_get(manager, name, &netdev);
2568
2569 switch (type) {
2570 case RTM_NEWLINK:
2571 if (netdev) {
2572 /* netdev exists, so make sure the ifindex matches */
2573 r = netdev_set_ifindex(netdev, message);
2574 if (r < 0) {
2575 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
2576 return 0;
2577 }
2578 }
2579
2580 if (!link) {
2581 /* link is new, so add it */
2582 r = link_new(manager, message, &link);
2583 if (r < 0) {
2584 log_warning_errno(r, "Could not process new link message: %m");
2585 return 0;
2586 }
2587
2588 r = link_update(link, message);
2589 if (r < 0) {
2590 log_link_warning_errno(link, r, "Could not process link message: %m");
2591 link_enter_failed(link);
2592 return 0;
2593 }
2594
2595 r = link_check_initialized(link);
2596 if (r < 0) {
2597 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
2598 link_enter_failed(link);
2599 return 0;
2600 }
2601 } else {
2602 r = link_update(link, message);
2603 if (r < 0) {
2604 log_link_warning_errno(link, r, "Could not process link message: %m");
2605 link_enter_failed(link);
2606 return 0;
2607 }
2608 }
2609 break;
2610
2611 case RTM_DELLINK:
2612 link_drop(link);
2613 netdev_drop(netdev);
2614 break;
2615
2616 default:
2617 assert_not_reached();
2618 }
2619
2620 return 1;
2621 }
2622
2623 int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2624 uint16_t message_type;
2625 int r;
2626
2627 assert(m);
2628 assert(link);
2629 assert(error_msg);
2630
2631 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2632 return 0;
2633
2634 r = sd_netlink_message_get_errno(m);
2635 if (r < 0) {
2636 log_link_message_warning_errno(link, m, r, error_msg);
2637 link_enter_failed(link);
2638 return 0;
2639 }
2640
2641 r = sd_netlink_message_get_type(m, &message_type);
2642 if (r < 0) {
2643 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2644 return 0;
2645 }
2646 if (message_type != RTM_NEWLINK) {
2647 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2648 return 0;
2649 }
2650
2651 r = link_update(link, m);
2652 if (r < 0) {
2653 link_enter_failed(link);
2654 return 0;
2655 }
2656
2657 return 1;
2658 }
2659
2660 int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2661 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2662 int r;
2663
2664 assert(link);
2665 assert(link->manager);
2666 assert(link->manager->rtnl);
2667 assert(callback);
2668
2669 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2670 if (r < 0)
2671 return r;
2672
2673 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2674 link_netlink_destroy_callback, link);
2675 if (r < 0)
2676 return r;
2677
2678 link_ref(link);
2679 return 0;
2680 }
2681
2682 static const char* const link_state_table[_LINK_STATE_MAX] = {
2683 [LINK_STATE_PENDING] = "pending",
2684 [LINK_STATE_INITIALIZED] = "initialized",
2685 [LINK_STATE_CONFIGURING] = "configuring",
2686 [LINK_STATE_CONFIGURED] = "configured",
2687 [LINK_STATE_UNMANAGED] = "unmanaged",
2688 [LINK_STATE_FAILED] = "failed",
2689 [LINK_STATE_LINGER] = "linger",
2690 };
2691
2692 DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
2693
2694 int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2695 _cleanup_free_ char *str = NULL;
2696 static const char* map[] = {
2697 [LOG2U(IFF_UP)] = "up", /* interface is up. */
2698 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid.*/
2699 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2700 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2701 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2702 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2703 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2704 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2705 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2706 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2707 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2708 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
2709 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast.*/
2710 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2711 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2712 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2713 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2714 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2715 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
2716 };
2717
2718 assert(ret);
2719
2720 for (size_t i = 0; i < ELEMENTSOF(map); i++)
2721 if (FLAGS_SET(flags, 1 << i) && map[i])
2722 if (!strextend_with_separator(&str, ",", map[i]))
2723 return -ENOMEM;
2724
2725 *ret = TAKE_PTR(str);
2726 return 0;
2727 }
2728
2729 static const char * const kernel_operstate_table[] = {
2730 [IF_OPER_UNKNOWN] = "unknown",
2731 [IF_OPER_NOTPRESENT] = "not-present",
2732 [IF_OPER_DOWN] = "down",
2733 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2734 [IF_OPER_TESTING] = "testing",
2735 [IF_OPER_DORMANT] = "dormant",
2736 [IF_OPER_UP] = "up",
2737 };
2738
2739 DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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