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man: systemd-measure. Remove 'tpm2-pcrs=' from cryptenroll command (#39590)
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
f579559b 3#include <linux/if.h>
8f815e8b 4#include <linux/if_arp.h>
518cd6b5 5#include <linux/if_link.h>
2a0d07d6 6#include <linux/netdevice.h>
1cf40697 7#include <net/if.h>
8430841b 8#include <sys/socket.h>
4cc7a82c 9#include <unistd.h>
f579559b 10
baa3fadf
DDM		 11#include "sd-bus.h"
12#include "sd-dhcp-client.h"
13#include "sd-dhcp-server.h"
14#include "sd-dhcp6-client.h"
15#include "sd-dhcp6-lease.h"
16#include "sd-ipv4ll.h"
17#include "sd-lldp-rx.h"
18#include "sd-ndisc.h"
19#include "sd-netlink.h"
20#include "sd-radv.h"
21
b5efdb8a 22#include "alloc-util.h"
8a77e245 23#include "arphrd-util.h"
1e4e5572 24#include "bitfield.h"
3be9d62a 25#include "device-util.h"
baa3fadf 26#include "errno-util.h"
4bb7cc82 27#include "ethtool-util.h"
6706ce2f 28#include "event-util.h"
868258cf 29#include "format-ifname.h"
af664001 30#include "fs-util.h"
e2341b6b 31#include "glyph-util.h"
3ae6b3bf 32#include "logarithm.h"
baa3fadf 33#include "netif-util.h"
cf1d700d 34#include "netlink-util.h"
093e3533 35#include "networkd-address.h"
1cf40697 36#include "networkd-address-label.h"
9671ae9d 37#include "networkd-bridge-fdb.h"
ff9e0783 38#include "networkd-bridge-mdb.h"
11cee6ef 39#include "networkd-bridge-vlan.h"
d5ebcf65 40#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 41#include "networkd-dhcp-server.h"
ca5ad760
YW		 42#include "networkd-dhcp4.h"
43#include "networkd-dhcp6.h"
76a86ffd 44#include "networkd-ipv4acd.h"
ca5ad760 45#include "networkd-ipv4ll.h"
76c5a0f2 46#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4 47#include "networkd-link.h"
1cf40697 48#include "networkd-link-bus.h"
8e1ad1ea 49#include "networkd-lldp-tx.h"
23f53b99 50#include "networkd-manager.h"
1e7a0e21 51#include "networkd-ndisc.h"
e4a71bf3 52#include "networkd-neighbor.h"
75156ccb 53#include "networkd-nexthop.h"
19d9a5ad 54#include "networkd-queue.h"
7465dd22 55#include "networkd-radv.h"
3b6a3bde 56#include "networkd-route.h"
1cf40697 57#include "networkd-route-util.h"
bce67bbe 58#include "networkd-routing-policy-rule.h"
0fa8ee6c 59#include "networkd-setlink.h"
19d9a5ad 60#include "networkd-sriov.h"
3b5a4fc6 61#include "networkd-state-file.h"
19d9a5ad 62#include "networkd-sysctl.h"
986b2514 63#include "networkd-wifi.h"
baa3fadf 64#include "ordered-set.h"
c94f6ab1 65#include "parse-util.h"
cf1d700d
TG		 66#include "set.h"
67#include "socket-util.h"
8b43440b 68#include "string-table.h"
baa3fadf 69#include "string-util.h"
51517f9e 70#include "strv.h"
34658df2 71#include "tc.h"
299ad32d 72#include "udev-util.h"
fc2f9534 73
2278d9f6
YW		 74void link_required_operstate_for_online(Link *link, LinkOperationalStateRange *ret) {
75 assert(link);
76 assert(ret);
77
78 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
a853cc99 79 /* If explicitly specified, use it as is. */
2278d9f6 80 *ret = link->network->required_operstate_for_online;
3255bda6 81 else if (link->iftype == ARPHRD_CAN)
a853cc99 82 /* CAN devices do not support addressing, hence defaults to 'carrier'. */
3255bda6
YW		 83 *ret = (const LinkOperationalStateRange) {
84 .min = LINK_OPERSTATE_CARRIER,
85 .max = LINK_OPERSTATE_CARRIER,
86 };
a853cc99
YW		 87 else if (link->network && link->network->bond)
88 /* Bonding slaves do not support addressing. */
89 *ret = (const LinkOperationalStateRange) {
90 .min = LINK_OPERSTATE_ENSLAVED,
91 .max = LINK_OPERSTATE_ENSLAVED,
92 };
93 else if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
94 /* Some of slave interfaces may be offline. */
95 *ret = (const LinkOperationalStateRange) {
96 .min = LINK_OPERSTATE_DEGRADED_CARRIER,
97 .max = LINK_OPERSTATE_ROUTABLE,
98 };
2278d9f6
YW		 99 else
100 *ret = LINK_OPERSTATE_RANGE_DEFAULT;
101}
102
a853cc99
YW		 103AddressFamily link_required_family_for_online(Link *link) {
104 assert(link);
105
106 if (link->network && link->network->required_family_for_online >= 0)
107 return link->network->required_family_for_online;
108
109 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
110 /* If RequiredForOnline= is explicitly specified, defaults to no. */
111 return ADDRESS_FAMILY_NO;
112
113 if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
114 /* As the minimum required operstate for master interfaces is 'degraded-carrier',
115 * we should request an address assigned to the link for backward compatibility. */
116 return ADDRESS_FAMILY_YES;
117
118 return ADDRESS_FAMILY_NO;
119}
120
5e0534f1 121bool link_ipv6_enabled(Link *link) {
439689c6
SS		 122 assert(link);
123
124 if (!socket_ipv6_is_supported())
125 return false;
126
5fb5fae9 127 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 128 return false;
129
5fb5fae9
YW		 130 if (!link->network)
131 return false;
132
133 if (link->network->bond)
af9ba57a
YW		 134 return false;
135
291b6fee 136 if (link_ipv6ll_enabled(link))
adfeee49
YW		 137 return true;
138
139 if (network_has_static_ipv6_configurations(link->network))
140 return true;
141
142 return false;
439689c6
SS		 143}
144
fc35a9f8
YW		 145bool link_has_ipv6_connectivity(Link *link) {
146 LinkAddressState ipv6_address_state;
147
148 assert(link);
149
150 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
151
152 switch (ipv6_address_state) {
153 case LINK_ADDRESS_STATE_ROUTABLE:
154 /* If the interface has a routable IPv6 address, then we assume yes. */
155 return true;
156
157 case LINK_ADDRESS_STATE_DEGRADED:
158 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
159 * there is an IPv6 default gateway. */
160 return link_has_default_gateway(link, AF_INET6);
161
162 case LINK_ADDRESS_STATE_OFF:
163 /* No IPv6 address. */
164 return false;
165
166 default:
167 assert_not_reached();
168 }
169}
170
e33232d4 171static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 172 assert(link);
173
d8d4db58
YW		 174 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
175 return false;
176
2fd3908b
YW		 177 if (!link->network)
178 return allow_unmanaged;
7191a57a 179
baa95d22
YW		 180 if (!link->network->configure_without_carrier) {
181 if (link->set_flags_messages > 0)
182 return false;
183
184 if (!link_has_carrier(link))
185 return false;
186 }
7191a57a 187
0fa8ee6c
YW		 188 if (link->set_link_messages > 0)
189 return false;
190
112a0972
YW		 191 if (!link->activated)
192 return false;
112a0972 193
7191a57a
YW		 194 return true;
195}
196
e33232d4
YW		 197bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
198 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
199}
200
5078e366
YW		 201bool link_is_ready_to_configure_by_name(Manager *manager, const char *name, bool allow_unmanaged) {
202 assert(manager);
203 assert(name);
204
205 Link *link;
206 if (link_get_by_name(manager, name, &link) < 0)
207 return false;
208
209 return link_is_ready_to_configure(link, allow_unmanaged);
210}
211
15761549
YW		 212void link_ntp_settings_clear(Link *link) {
213 link->ntp = strv_free(link->ntp);
214}
215
216void link_dns_settings_clear(Link *link) {
f5fbe71d 217 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 218 for (unsigned i = 0; i < link->n_dns; i++)
219 in_addr_full_free(link->dns[i]);
15761549 220 link->dns = mfree(link->dns);
f5fbe71d 221 link->n_dns = UINT_MAX;
15761549 222
6e4571f0
YW		 223 link->search_domains = ordered_set_free(link->search_domains);
224 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 225
226 link->dns_default_route = -1;
227 link->llmnr = _RESOLVE_SUPPORT_INVALID;
228 link->mdns = _RESOLVE_SUPPORT_INVALID;
229 link->dnssec_mode = _DNSSEC_MODE_INVALID;
230 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
231
25a9bd72 232 link->dnssec_negative_trust_anchors = set_free(link->dnssec_negative_trust_anchors);
15761549
YW		 233}
234
49e50134 235static void link_free_engines(Link *link) {
1a6bb31f
YW		 236 if (!link)
237 return;
238
239 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 240
1a6bb31f
YW		 241 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
242 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 243 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 244
35778343 245 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 246 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 247
5385e5f9
YW		 248 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
249
1a6bb31f 250 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 251
1a6bb31f 252 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 253 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 254
1a6bb31f 255 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 256 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
257 ndisc_flush(link);
258
1a6bb31f
YW		 259 link->radv = sd_radv_unref(link->radv);
260}
261
4cf443e6 262static Link* link_free(Link *link) {
8301aa0b 263 assert(link);
f579559b 264
22583a00 265 (void) link_clear_sysctl_shadows(link);
6d9ef22a 266
15761549
YW		 267 link_ntp_settings_clear(link);
268 link_dns_settings_clear(link);
269
8eec0b9d 270 link->neighbors = set_free(link->neighbors);
8eec0b9d 271 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 272 link->qdiscs = set_free(link->qdiscs);
273 link->tclasses = set_free(link->tclasses);
adda1ed9 274
a27588d4 275 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 276
1a6bb31f 277 link_free_engines(link);
49699bac 278
b0ff6dea 279 set_free(link->sr_iov_virt_port_ifindices);
c166a070 280 free(link->ifname);
572b21d9 281 strv_free(link->alternative_names);
ceac4078 282 free(link->kind);
8d968fdd 283 free(link->ssid);
6706ce2f 284 free(link->previous_ssid);
c643bda5 285 free(link->driver);
6cad256d 286
a34e58d4 287 unlink_and_free(link->lease_file);
a34e58d4 288 unlink_and_free(link->state_file);
c166a070 289
8de56fb3 290 sd_device_unref(link->dev);
9aa2585e 291 netdev_unref(link->netdev);
b5db00e5 292
0d4ad91d 293 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 294 hashmap_free(link->bound_by_links);
295
4cf443e6 296 set_free(link->slaves);
033295c1 297
c9c908a6
YW		 298 network_unref(link->network);
299
6706ce2f 300 sd_event_source_disable_unref(link->carrier_lost_timer);
39283a1f 301 sd_event_source_disable_unref(link->ipv6_mtu_wait_synced_event_source);
6706ce2f 302
8301aa0b 303 return mfree(link);
14b746f7
TG		 304}
305
8301aa0b 306DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 307
4cf443e6
YW		 308DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
309 link_hash_ops,
310 void, trivial_hash_func, trivial_compare_func,
311 Link, link_unref);
312
6eab614d 313int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 314 Link *link;
11a7f229
TG		 315
316 assert(m);
c2aed128
YW		 317
318 if (ifindex <= 0)
319 return -EINVAL;
11a7f229 320
6eab614d 321 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 322 if (!link)
323 return -ENODEV;
324
0b54c870
YW		 325 if (ret)
326 *ret = link;
327 return 0;
328}
329
330int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
331 Link *link;
332
333 assert(m);
334 assert(ifname);
11a7f229 335
0b54c870
YW		 336 link = hashmap_get(m->links_by_name, ifname);
337 if (!link)
338 return -ENODEV;
339
340 if (ret)
341 *ret = link;
11a7f229
TG		 342 return 0;
343}
344
fe321d45
YW		 345int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
346 Link *link;
347
348 assert(m);
349 assert(hw_addr);
350
351 link = hashmap_get(m->links_by_hw_addr, hw_addr);
352 if (!link)
353 return -ENODEV;
354
355 if (ret)
356 *ret = link;
357 return 0;
358}
359
81357285
YW		 360int link_get_master(Link *link, Link **ret) {
361 assert(link);
362 assert(link->manager);
363 assert(ret);
364
365 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
366 return -ENODEV;
367
6eab614d 368 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 369}
370
af9ba57a 371void link_set_state(Link *link, LinkState state) {
e331e246
TG		 372 assert(link);
373
374 if (link->state == state)
375 return;
376
0beb9542
YW		 377 log_link_debug(link, "State changed: %s -> %s",
378 link_state_to_string(link->state),
379 link_state_to_string(state));
380
e331e246
TG		 381 link->state = state;
382
38c9ca53 383 link_send_changed(link, "AdministrativeState");
9092113d 384 link_dirty(link);
e331e246
TG		 385}
386
80a89d1a 387int link_stop_engines(Link *link, bool may_keep_dynamic) {
372acaad 388 int r, ret = 0;
111bb8f9
TG		 389
390 assert(link);
391 assert(link->manager);
392 assert(link->manager->event);
393
80a89d1a
YW		 394 bool keep_dynamic =
395 may_keep_dynamic &&
8c3d6d71
YW		 396 link->network &&
397 (link->manager->state == MANAGER_RESTARTING ||
80a89d1a 398 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DYNAMIC_ON_STOP));
80060352 399
80a89d1a 400 if (!keep_dynamic) {
372acaad
YW		 401 r = sd_dhcp_client_stop(link->dhcp_client);
402 if (r < 0)
403 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m"));
4eca221a
YW		 404
405 r = sd_ipv4ll_stop(link->ipv4ll);
406 if (r < 0)
407 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m"));
408
409 r = sd_dhcp6_client_stop(link->dhcp6_client);
410 if (r < 0)
411 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m"));
412
413 r = dhcp_pd_remove(link, /* only_marked = */ false);
414 if (r < 0)
415 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not remove DHCPv6 PD addresses and routes: %m"));
416
417 r = ndisc_stop(link);
418 if (r < 0)
419 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Discovery: %m"));
420
421 ndisc_flush(link);
111bb8f9
TG		 422 }
423
372acaad
YW		 424 r = sd_dhcp_server_stop(link->dhcp_server);
425 if (r < 0)
426 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 server: %m"));
2a99eed0 427
372acaad
YW		 428 r = sd_lldp_rx_stop(link->lldp_rx);
429 if (r < 0)
430 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Rx: %m"));
c01b9b87 431
372acaad
YW		 432 r = sd_lldp_tx_stop(link->lldp_tx);
433 if (r < 0)
434 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Tx: %m"));
9cc65242 435
372acaad
YW		 436 r = ipv4acd_stop(link);
437 if (r < 0)
438 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 ACD client: %m"));
051e77ca 439
372acaad
YW		 440 r = sd_radv_stop(link->radv);
441 if (r < 0)
442 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Advertisement: %m"));
7465dd22 443
372acaad 444 return ret;
111bb8f9
TG		 445}
446
b22d8a00 447void link_enter_failed(Link *link) {
ef1ba606 448 assert(link);
f882c247 449
370e9930 450 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 451 return;
452
6a7a4e4d 453 log_link_warning(link, "Failed");
449f7554 454
e331e246 455 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 456
c2eb7753
YW		 457 if (!ratelimit_below(&link->automatic_reconfigure_ratelimit)) {
458 log_link_warning(link, "The interface entered the failed state frequently, refusing to reconfigure it automatically.");
459 goto stop;
460 }
461
462 log_link_info(link, "Trying to reconfigure the interface.");
2b07a321 463 if (link_reconfigure(link, LINK_RECONFIGURE_UNCONDITIONALLY) > 0)
021d39d3 464 return;
c2eb7753
YW		 465
466stop:
80a89d1a 467 (void) link_stop_engines(link, /* may_keep_dynamic = */ false);
f882c247
TG		 468}
469
6accfd31
DA		 470void link_check_ready(Link *link) {
471 Address *a;
6accfd31
DA		 472
473 assert(link);
474
5f58af25
YW		 475 if (link->state == LINK_STATE_CONFIGURED)
476 return;
477
d19b9939
YW		 478 if (link->state != LINK_STATE_CONFIGURING)
479 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 480
481 if (!link->network)
a7f07cbe 482 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 483
7558f9e7
YW		 484 if (!link->tc_configured)
485 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 486
a7f07cbe
YW		 487 if (link->set_link_messages > 0)
488 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
489
490 if (!link->activated)
491 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
492
24b9c341 493 if (link->iftype == ARPHRD_CAN)
7558f9e7 494 /* let's shortcut things for CAN which doesn't need most of checks below. */
24b9c341 495 goto ready;
7558f9e7 496
879377ca
YW		 497 if (!link->stacked_netdevs_created)
498 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
499
76c5a0f2 500 if (!link->static_addresses_configured)
d19b9939 501 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 502
354bc760
YW		 503 if (!link->static_address_labels_configured)
504 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
505
e5b35bf6
YW		 506 if (!link->static_bridge_fdb_configured)
507 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
508
ff9e0783
YW		 509 if (!link->static_bridge_mdb_configured)
510 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
511
fdeba3f5
YW		 512 if (!link->static_ipv6_proxy_ndp_configured)
513 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
514
40ca350e
YW		 515 if (!link->static_neighbors_configured)
516 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
517
d19b9939
YW		 518 if (!link->static_nexthops_configured)
519 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 520
76c5a0f2
YW		 521 if (!link->static_routes_configured)
522 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
523
0e5ef6be 524 if (!link->static_routing_policy_rules_configured)
d19b9939 525 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 526
d19b9939
YW		 527 if (!link->sr_iov_configured)
528 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 529
4bcb8625
YW		 530 /* IPv6LL is assigned after the link gains its carrier. */
531 if (!link->network->configure_without_carrier &&
532 link_ipv6ll_enabled(link) &&
533 !in6_addr_is_set(&link->ipv6ll_address))
534 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
535
9e7d91ed
YW		 536 /* All static addresses must be ready. */
537 bool has_static_address = false;
538 SET_FOREACH(a, link->addresses) {
539 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
540 continue;
541 if (!address_is_ready(a))
542 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
543 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
544 has_static_address = true;
545 }
546
547 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
548 if (has_static_address)
549 goto ready;
550
5f950e56
YW		 551 /* If no dynamic addressing protocol enabled, assume the interface is ready.
552 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
553 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
554 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
52672db3 555 (link->network->configure_without_carrier || !link_ndisc_enabled(link)))
5f950e56
YW		 556 goto ready;
557
558 bool ipv4ll_ready =
559 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
560 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
561 bool dhcp4_ready =
562 link_dhcp4_enabled(link) && link->dhcp4_configured &&
563 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
564 bool dhcp6_ready =
565 link_dhcp6_enabled(link) && link->dhcp6_configured &&
566 (!link->network->dhcp6_use_address ||
567 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
568 bool dhcp_pd_ready =
569 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
570 (!link->network->dhcp_pd_assign ||
571 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
572 bool ndisc_ready =
52672db3
YW		 573 link_ndisc_enabled(link) && link->ndisc_configured &&
574 (!link->network->ndisc_use_autonomous_prefix ||
5f950e56
YW		 575 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
576
195b83ed
YW		 577 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
578 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
579 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 580 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
b4054aff 581 if (!link->dhcp4_configured)
195b83ed
YW		 582 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
583 if (!dhcp_pd_ready)
584 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
585 }
586
587 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 588 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
b4054aff 589 if (!link->dhcp6_configured)
195b83ed
YW		 590 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
591 if (!dhcp_pd_ready)
592 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
593 }
594 }
595
5f950e56
YW		 596 /* At least one dynamic addressing protocol is finished. */
597 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
598 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
599
600 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
601 __func__,
602 yes_no(ipv4ll_ready),
603 yes_no(dhcp4_ready),
604 yes_no(dhcp6_ready),
605 yes_no(dhcp_pd_ready),
606 yes_no(ndisc_ready));
607
608ready:
29836c16 609 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 610}
611
97108953 612static int link_request_static_configs(Link *link) {
f882c247
TG		 613 int r;
614
615 assert(link);
616 assert(link->network);
f5be5601 617 assert(link->state != _LINK_STATE_INVALID);
f882c247 618
354bc760 619 r = link_request_static_addresses(link);
0e5ef6be
YW		 620 if (r < 0)
621 return r;
622
354bc760 623 r = link_request_static_address_labels(link);
f3ef324d
YW		 624 if (r < 0)
625 return r;
e4a71bf3 626
e5b35bf6
YW		 627 r = link_request_static_bridge_fdb(link);
628 if (r < 0)
629 return r;
630
9a038aac
YW		 631 r = link_request_static_bridge_mdb(link);
632 if (r < 0)
633 return r;
634
fdeba3f5
YW		 635 r = link_request_static_ipv6_proxy_ndp_addresses(link);
636 if (r < 0)
637 return r;
638
40ca350e 639 r = link_request_static_neighbors(link);
682c65b0
YW		 640 if (r < 0)
641 return r;
bd6379ec 642
76c5a0f2 643 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 644 if (r < 0)
645 return r;
f882c247 646
76c5a0f2
YW		 647 r = link_request_static_routes(link, false);
648 if (r < 0)
649 return r;
650
651 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 652 if (r < 0)
653 return r;
d4cdbea5 654
f882c247
TG		 655 return 0;
656}
657
b8b0c1a0 658int link_request_stacked_netdevs(Link *link, NetDevLocalAddressType type) {
1187fc33 659 NetDev *netdev;
e16e4b3b
DS		 660 int r;
661
662 assert(link);
663
b8b0c1a0
YW		 664 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
665 return 0;
666
667 assert(link->network);
668
1187fc33 669 link->stacked_netdevs_created = false;
e16e4b3b 670
1187fc33 671 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b8b0c1a0
YW		 672 if (!netdev_needs_reconfigure(netdev, type))
673 continue;
674
b14686ff 675 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 676 if (r < 0)
677 return r;
678 }
e16e4b3b 679
bb916f35 680 if (link->create_stacked_netdev_messages == 0) {
1187fc33 681 link->stacked_netdevs_created = true;
bb916f35
YW		 682 link_check_ready(link);
683 }
e16e4b3b
DS		 684
685 return 0;
686}
687
8566df79 688static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 689 int r;
690
691 assert(link);
692
0f96a823
YW		 693 r = radv_start(link);
694 if (r < 0)
695 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 696
294f129b
YW		 697 r = ndisc_start(link);
698 if (r < 0)
699 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 700
294f129b
YW		 701 r = dhcp6_start(link);
702 if (r < 0)
703 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 704
e7ab854c
TG		 705 return 0;
706}
707
8566df79 708static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 709 int r;
710
711 assert(link);
ff254138
TG		 712 assert(link->manager);
713 assert(link->manager->event);
714
0107b769 715 if (link->dhcp_client) {
294f129b 716 r = dhcp4_start(link);
0107b769 717 if (r < 0)
294f129b 718 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 719
ccffa166 720 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 721
ccffa166 722 } else if (link->ipv4ll) {
59c27231
AK		 723 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
724 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
725 if (r < 0)
726 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
727 }
728
b5c83cd5 729 r = ipv4ll_start(link);
6a7a4e4d
LP		 730 if (r < 0)
731 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
b5c83cd5
YW		 732 if (r > 0)
733 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 734 }
735
c91f8f90
YW		 736 r = link_start_dhcp4_server(link);
737 if (r < 0)
738 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
ab486ef4 739
76a86ffd
YW		 740 r = ipv4acd_start(link);
741 if (r < 0)
742 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
743
6fc25497
SS		 744 return 0;
745}
746
8566df79 747static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 748 int r;
749
750 assert(link);
0f96a823 751 assert(link->network);
6fc25497 752
8566df79 753 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 754 if (r < 0)
755 return r;
756
94876904 757 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 758 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 759 if (r < 0)
760 return r;
761 }
762
a27588d4 763 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 764 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
765 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
766 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
767 * below will be called in radv_start(). */
a27588d4 768 r = dhcp_request_prefix_delegation(link);
0f96a823 769 if (r < 0)
a27588d4 770 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 771 }
772
c01b9b87
YW		 773 if (link->lldp_tx) {
774 r = sd_lldp_tx_start(link->lldp_tx);
775 if (r < 0)
776 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
777 }
8e1ad1ea 778
35778343
YW		 779 if (link->lldp_rx) {
780 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 781 if (r < 0)
782 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
783 }
784
ff254138
TG		 785 return 0;
786}
787
7657ec3e 788int link_ipv6ll_gained(Link *link) {
0c9ee5d5 789 int r;
deb2e523 790
0c9ee5d5 791 assert(link);
deb2e523 792
0c9ee5d5 793 log_link_info(link, "Gained IPv6LL");
deb2e523 794
7657ec3e
YW		 795 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
796 return 0;
0c9ee5d5 797
7657ec3e
YW		 798 r = link_acquire_dynamic_ipv6_conf(link);
799 if (r < 0)
800 return r;
0c9ee5d5 801
b8b0c1a0
YW		 802 r = link_request_stacked_netdevs(link, NETDEV_LOCAL_ADDRESS_IPV6LL);
803 if (r < 0)
804 return r;
805
7657ec3e 806 link_check_ready(link);
0c9ee5d5 807 return 0;
deb2e523
TG		 808}
809
112a0972 810int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 811 bool required_up = false;
812 bool link_is_up = false;
852a3916 813 Link *l;
0d4ad91d
AR		 814
815 assert(link);
816
ad82f0c3
YW		 817 /* If at least one interface in bound_to_links has carrier, then make this interface up.
818 * If all interfaces in bound_to_links do not, then make this interface down. */
819
0d4ad91d
AR		 820 if (hashmap_isempty(link->bound_to_links))
821 return 0;
822
823 if (link->flags & IFF_UP)
824 link_is_up = true;
825
852a3916 826 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 827 if (link_has_carrier(l)) {
828 required_up = true;
829 break;
830 }
831
852a3916 832 if (!required_up && link_is_up)
68f52063 833 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 834 if (required_up && !link_is_up)
68f52063 835 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 836
837 return 0;
838}
839
840static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 841 Link *l;
842 int r;
843
844 assert(link);
845
ad82f0c3
YW		 846 /* Update up or down state of interfaces which depend on this interface's carrier state. */
847
852a3916 848 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 849 r = link_handle_bound_to_list(l);
850 if (r < 0)
851 return r;
852 }
853
854 return 0;
855}
856
857static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
858 int r;
859
860 assert(link);
861 assert(carrier);
862
863 if (link == carrier)
864 return 0;
865
866 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
867 return 0;
868
190b3b5c 869 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 870 if (r < 0)
871 return r;
872
9092113d
YW		 873 link_dirty(link);
874
0d4ad91d
AR		 875 return 0;
876}
877
878static int link_new_bound_by_list(Link *link) {
879 Manager *m;
880 Link *carrier;
0d4ad91d 881 int r;
0d4ad91d
AR		 882
883 assert(link);
884 assert(link->manager);
885
886 m = link->manager;
887
6eab614d 888 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 889 if (!carrier->network)
890 continue;
891
892 if (strv_isempty(carrier->network->bind_carrier))
893 continue;
894
191a3f16 895 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 896 r = link_put_carrier(link, carrier, &link->bound_by_links);
897 if (r < 0)
898 return r;
0d4ad91d
AR		 899 }
900 }
901
90e74a66 902 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 903 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
904 if (r < 0)
905 return r;
0d4ad91d
AR		 906 }
907
908 return 0;
909}
910
911static int link_new_bound_to_list(Link *link) {
912 Manager *m;
913 Link *carrier;
0d4ad91d 914 int r;
0d4ad91d
AR		 915
916 assert(link);
917 assert(link->manager);
918
919 if (!link->network)
920 return 0;
921
922 if (strv_isempty(link->network->bind_carrier))
923 return 0;
924
925 m = link->manager;
926
6eab614d 927 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 928 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 929 r = link_put_carrier(link, carrier, &link->bound_to_links);
930 if (r < 0)
931 return r;
0d4ad91d
AR		 932 }
933 }
934
852a3916 935 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 936 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
937 if (r < 0)
938 return r;
0d4ad91d
AR		 939 }
940
941 return 0;
942}
943
0d4ad91d 944static void link_free_bound_to_list(Link *link) {
9092113d 945 bool updated = false;
0d4ad91d 946 Link *bound_to;
0d4ad91d 947
9092113d
YW		 948 assert(link);
949
950 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
951 updated = true;
0d4ad91d
AR		 952
953 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 954 link_dirty(bound_to);
0d4ad91d
AR		 955 }
956
9092113d
YW		 957 if (updated)
958 link_dirty(link);
0d4ad91d
AR		 959}
960
961static void link_free_bound_by_list(Link *link) {
9092113d 962 bool updated = false;
0d4ad91d 963 Link *bound_by;
0d4ad91d 964
9092113d
YW		 965 assert(link);
966
967 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
968 updated = true;
0d4ad91d
AR		 969
970 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 971 link_dirty(bound_by);
0d4ad91d
AR		 972 link_handle_bound_to_list(bound_by);
973 }
974 }
975
9092113d
YW		 976 if (updated)
977 link_dirty(link);
0d4ad91d
AR		 978}
979
81357285 980static int link_append_to_master(Link *link) {
5f707e12
YW		 981 Link *master;
982 int r;
983
984 assert(link);
5f707e12 985
81357285
YW		 986 /* - The link may have no master.
987 * - RTM_NEWLINK message about master interface may not be received yet. */
988 if (link_get_master(link, &master) < 0)
989 return 0;
5f707e12 990
4cf443e6 991 r = set_ensure_put(&master->slaves, &link_hash_ops, link);
38288f0b 992 if (r <= 0)
5f707e12
YW		 993 return r;
994
995 link_ref(link);
996 return 0;
997}
998
81357285 999static void link_drop_from_master(Link *link) {
5f707e12
YW		 1000 Link *master;
1001
1002 assert(link);
1003
81357285 1004 if (!link->manager)
5f707e12
YW		 1005 return;
1006
81357285 1007 if (link_get_master(link, &master) < 0)
5f707e12
YW		 1008 return;
1009
1010 link_unref(set_remove(master->slaves, link));
1011}
1012
4303e980 1013static int link_drop_requests(Link *link) {
56001f02 1014 Request *req;
4303e980 1015 int ret = 0;
56001f02
YW		 1016
1017 assert(link);
1018 assert(link->manager);
1019
4303e980
YW		 1020 ORDERED_SET_FOREACH(req, link->manager->request_queue) {
1021 if (req->link != link)
1022 continue;
1023
1024 /* If the request is already called, but its reply is not received, then we need to
1025 * drop the configuration (e.g. address) here. Note, if the configuration is known,
dd6d53a8 1026 * it will be handled later by link_drop_unmanaged_addresses() or so. */
4303e980
YW		 1027 if (req->waiting_reply && link->state != LINK_STATE_LINGER)
1028 switch (req->type) {
1029 case REQUEST_TYPE_ADDRESS: {
1030 Address *address = ASSERT_PTR(req->userdata);
1031
1032 if (address_get(link, address, NULL) < 0)
1033 RET_GATHER(ret, address_remove(address, link));
1034 break;
1035 }
c902fa08
YW		 1036 case REQUEST_TYPE_NEIGHBOR: {
1037 Neighbor *neighbor = ASSERT_PTR(req->userdata);
1038
1039 if (neighbor_get(link, neighbor, NULL) < 0)
1040 RET_GATHER(ret, neighbor_remove(neighbor, link));
1041 break;
1042 }
9a988d16
YW		 1043 case REQUEST_TYPE_NEXTHOP: {
1044 NextHop *nexthop = ASSERT_PTR(req->userdata);
1045
1046 if (nexthop_get_by_id(link->manager, nexthop->id, NULL) < 0)
1047 RET_GATHER(ret, nexthop_remove(nexthop, link->manager));
1048 break;
1049 }
97979ece
YW		 1050 case REQUEST_TYPE_ROUTE: {
1051 Route *route = ASSERT_PTR(req->userdata);
1052
1053 if (route_get(link->manager, route, NULL) < 0)
1054 RET_GATHER(ret, route_remove(route, link->manager));
1055 break;
1056 }
4303e980
YW		 1057 default:
1058 ;
1059 }
1060
b9b5096e 1061 request_detach(req);
4303e980
YW		 1062 }
1063
1064 return ret;
56001f02
YW		 1065}
1066
cc2d7efc 1067static Link *link_drop(Link *link) {
63130eb3 1068 if (!link)
cc2d7efc 1069 return NULL;
0d4ad91d 1070
63130eb3
YW		 1071 assert(link->manager);
1072
0d4ad91d
AR		 1073 link_set_state(link, LINK_STATE_LINGER);
1074
63130eb3
YW		 1075 /* Drop all references from other links and manager. Note that async netlink calls may have
1076 * references to the link, and they will be dropped when we receive replies. */
1077
4303e980 1078 (void) link_drop_requests(link);
56001f02 1079
bb193d2d
YW		 1080 link_free_bound_to_list(link);
1081 link_free_bound_by_list(link);
0d4ad91d 1082
b0ff6dea
YW		 1083 link_clear_sr_iov_ifindices(link);
1084
81357285 1085 link_drop_from_master(link);
5f707e12 1086
4c78dc17
YW		 1087 if (link->state_file)
1088 (void) unlink(link->state_file);
1089
63130eb3
YW		 1090 link_clean(link);
1091
0b54c870
YW		 1092 STRV_FOREACH(n, link->alternative_names)
1093 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 1094 hashmap_remove(link->manager->links_by_name, link->ifname);
1095
fe321d45 1096 /* bonding master and its slaves have the same hardware address. */
e74f1d07 1097 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 1098
63130eb3 1099 /* The following must be called at last. */
6eab614d 1100 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1101 return link_unref(link);
0d4ad91d
AR		 1102}
1103
dd6d53a8 1104static int link_drop_unmanaged_config(Link *link) {
1339b950 1105 int r;
0b81225e
YW		 1106
1107 assert(link);
dd6d53a8 1108 assert(link->state == LINK_STATE_CONFIGURING);
0b81225e 1109 assert(link->manager);
5e5b137a 1110
dd6d53a8
YW		 1111 r = link_drop_unmanaged_routes(link);
1112 RET_GATHER(r, link_drop_unmanaged_nexthops(link));
1113 RET_GATHER(r, link_drop_unmanaged_addresses(link));
1114 RET_GATHER(r, link_drop_unmanaged_neighbors(link));
1115 RET_GATHER(r, link_drop_unmanaged_routing_policy_rules(link));
0b81225e
YW		 1116
1117 return r;
5e5b137a
TG		 1118}
1119
dd6d53a8 1120static int link_drop_static_config(Link *link) {
1339b950 1121 int r;
0b81225e
YW		 1122
1123 assert(link);
1124 assert(link->manager);
3104883d 1125
e09b7588
YW		 1126 r = link_drop_static_routes(link);
1127 RET_GATHER(r, link_drop_static_nexthops(link));
1128 RET_GATHER(r, link_drop_static_addresses(link));
1129 RET_GATHER(r, link_drop_static_neighbors(link));
1130 RET_GATHER(r, link_drop_static_routing_policy_rules(link));
3104883d 1131
0b81225e 1132 return r;
3104883d
SS		 1133}
1134
451c2baf
YW		 1135static int link_drop_dynamic_config(Link *link, Network *network) {
1136 int r;
1137
1138 assert(link);
82df2e0f 1139 assert(link->network);
451c2baf
YW		 1140
1141 /* Drop unnecessary dynamic configurations gracefully, e.g. drop DHCP lease in the case that
1142 * previously DHCP=yes and now DHCP=no, but keep DHCP lease when DHCP setting is unchanged. */
1143
1144 r = link_drop_ndisc_config(link, network);
42152390
YW		 1145 RET_GATHER(r, link_drop_radv_config(link, network)); /* Stop before dropping DHCP-PD prefixes. */
1146 RET_GATHER(r, link_drop_ipv4ll_config(link, network)); /* Stop before DHCPv4 client. */
451c2baf
YW		 1147 RET_GATHER(r, link_drop_dhcp4_config(link, network));
1148 RET_GATHER(r, link_drop_dhcp6_config(link, network));
1149 RET_GATHER(r, link_drop_dhcp_pd_config(link, network));
451c2baf
YW		 1150 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
1151 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); /* TODO: keep the received neighbors. */
1152 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1153
52f46b77
YW		 1154 /* Even if we do not release DHCP lease or so, reset 'configured' flags. Otherwise, e.g. if
1155 * previously UseDNS= was disabled but is now enabled, link will enter configured state before
1156 * expected DNS servers being acquired. */
1157 link->ipv4ll_address_configured = false;
1158 link->dhcp4_configured = false;
1159 link->dhcp6_configured = false;
1160 link->dhcp_pd_configured = false;
1161 link->ndisc_configured = false;
1162
451c2baf
YW		 1163 return r;
1164}
1165
c3b94251 1166static int link_configure(Link *link) {
4ecdcb07
YW		 1167 int r;
1168
ef1ba606 1169 assert(link);
b22d8a00 1170 assert(link->network);
bd08ce56 1171 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1172
1187fc33
YW		 1173 link_set_state(link, LINK_STATE_CONFIGURING);
1174
ed3bab7a
YW		 1175 r = link_drop_unmanaged_config(link);
1176 if (r < 0)
1177 return r;
1178
3cf58ef3
YW		 1179 r = link_new_bound_to_list(link);
1180 if (r < 0)
1181 return r;
1182
1dec9d81 1183 r = link_request_traffic_control(link);
4ecdcb07
YW		 1184 if (r < 0)
1185 return r;
1186
941f8e13
YW		 1187 r = link_configure_mtu(link);
1188 if (r < 0)
1189 return r;
1190
7558f9e7
YW		 1191 if (link->iftype == ARPHRD_CAN) {
1192 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1193 r = link_request_to_set_can(link);
1194 if (r < 0)
1195 return r;
1196
1197 return link_request_to_activate(link);
1198 }
1199
cb8453cc 1200 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1201 if (r < 0)
1202 return r;
1203
5e0534f1 1204 r = link_set_sysctl(link);
b69c3180
SS		 1205 if (r < 0)
1206 return r;
8749cbcd 1207
d05c332c 1208 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1209 if (r < 0)
1210 return r;
1211
72e65e6f
YW		 1212 r = link_request_to_set_ipoib(link);
1213 if (r < 0)
1214 return r;
1215
1187fc33 1216 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1217 if (r < 0)
1218 return r;
1219
1187fc33 1220 r = link_request_to_set_group(link);
99d2baa2
SS		 1221 if (r < 0)
1222 return r;
1223
1187fc33
YW		 1224 r = link_request_to_set_addrgen_mode(link);
1225 if (r < 0)
1226 return r;
1227
1228 r = link_request_to_set_master(link);
1229 if (r < 0)
1230 return r;
1231
b8b0c1a0 1232 r = link_request_stacked_netdevs(link, _NETDEV_LOCAL_ADDRESS_TYPE_INVALID);
1187fc33
YW		 1233 if (r < 0)
1234 return r;
1235
1236 r = link_request_to_set_bond(link);
1237 if (r < 0)
1238 return r;
1239
1240 r = link_request_to_set_bridge(link);
1241 if (r < 0)
1242 return r;
1243
1244 r = link_request_to_set_bridge_vlan(link);
1245 if (r < 0)
1246 return r;
1247
1248 r = link_request_to_activate(link);
89fe6535
SS		 1249 if (r < 0)
1250 return r;
1251
2ffd6d73
YW		 1252 r = ipv4ll_configure(link);
1253 if (r < 0)
1254 return r;
64b21ece 1255
ccffa166 1256 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1257 if (r < 0)
1258 return r;
eb34d4af 1259
ccffa166 1260 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1261 if (r < 0)
1262 return r;
f5a8c43f 1263
ba4c7184 1264 r = link_request_ndisc(link);
2ffd6d73
YW		 1265 if (r < 0)
1266 return r;
4138fb2c 1267
1d28a3cf
YW		 1268 r = link_request_dhcp_server(link);
1269 if (r < 0)
1270 return r;
1271
a254fab2 1272 r = link_request_radv(link);
086b8853
YW		 1273 if (r < 0)
1274 return r;
7465dd22 1275
2ffd6d73
YW		 1276 r = link_lldp_rx_configure(link);
1277 if (r < 0)
1278 return r;
ce43e484 1279
c01b9b87
YW		 1280 r = link_lldp_tx_configure(link);
1281 if (r < 0)
1282 return r;
1283
1187fc33
YW		 1284 r = link_request_static_configs(link);
1285 if (r < 0)
1286 return r;
1287
1288 if (!link_has_carrier(link))
1289 return 0;
1290
1291 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1292}
1293
170e88c8
YW		 1294static int link_get_network(Link *link, Network **ret) {
1295 Network *network;
1a3caa49 1296 int r;
170e88c8
YW		 1297
1298 assert(link);
1299 assert(link->manager);
1300 assert(ret);
1301
1302 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1303 bool warn = false;
1304
1a3caa49 1305 r = net_match_config(
170e88c8 1306 &network->match,
8de56fb3 1307 link->dev,
52135071
YW		 1308 &link->hw_addr,
1309 &link->permanent_hw_addr,
170e88c8
YW		 1310 link->driver,
1311 link->iftype,
65022cd7 1312 link->kind,
170e88c8
YW		 1313 link->ifname,
1314 link->alternative_names,
1315 link->wlan_iftype,
1316 link->ssid,
1a3caa49
YW		 1317 &link->bssid);
1318 if (r < 0)
1319 return r;
1320 if (r == 0)
170e88c8
YW		 1321 continue;
1322
8de56fb3 1323 if (network->match.ifname && link->dev) {
170e88c8
YW		 1324 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1325 const char *attr;
1326
8de56fb3 1327 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1328 (void) safe_atou8(attr, &name_assign_type);
1329
1330 warn = name_assign_type == NET_NAME_ENUM;
1331 }
1332
1333 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
5872ea70
YW		 1334 "Found matching .network file%s: %s",
1335 warn ? ", based on potentially unpredictable interface name" : "",
1336 network->filename);
170e88c8
YW		 1337
1338 if (network->unmanaged)
1339 return -ENOENT;
1340
1341 *ret = network;
1342 return 0;
1343 }
1344
5872ea70 1345 return log_link_debug_errno(link, SYNTHETIC_ERRNO(ENOENT), "No matching .network found.");
170e88c8
YW		 1346}
1347
5a1ef6df
YW		 1348static void link_enter_unmanaged(Link *link) {
1349 assert(link);
1350
1351 if (link->state == LINK_STATE_UNMANAGED)
1352 return;
1353
1354 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1355 "Unmanaging interface.");
1356
80a89d1a 1357 (void) link_stop_engines(link, /* may_keep_dynamic = */ false);
5a1ef6df 1358 (void) link_drop_requests(link);
dd6d53a8 1359 (void) link_drop_static_config(link);
5a1ef6df
YW		 1360
1361 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1362 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1363 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1364 * map here, as it depends on .network files assigned to other links. */
1365 link_free_bound_to_list(link);
1366 link_free_engines(link);
1367
1368 link->network = network_unref(link->network);
1369 link_set_state(link, LINK_STATE_UNMANAGED);
1370}
1371
78f8d5ed
YW		 1372static int link_managed_by_us(Link *link) {
1373 int r;
1374
1375 assert(link);
1376
1377 if (!link->dev)
1378 return true;
1379
1380 const char *s;
1381 r = sd_device_get_property_value(link->dev, "ID_NET_MANAGED_BY", &s);
1382 if (r == -ENOENT)
1383 return true;
1384 if (r < 0)
1385 return log_link_warning_errno(link, r, "Failed to get ID_NET_MANAGED_BY udev property: %m");
1386
1387 if (streq(s, "io.systemd.Network"))
1388 return true;
1389
1390 if (link->state == LINK_STATE_UNMANAGED)
1391 return false; /* Already in unmanaged state */
1392
1393 log_link_debug(link, "Interface is requested to be managed by '%s', unmanaging the interface.", s);
1394 link_set_state(link, LINK_STATE_UNMANAGED);
1395 return false;
1396}
1397
2b07a321 1398int link_reconfigure_impl(Link *link, LinkReconfigurationFlag flags) {
cb71e9c6 1399 Network *network = NULL;
ad932b15
YW		 1400 int r;
1401
5a1860f7 1402 assert(link);
db68e990 1403 assert(link->manager);
572b21d9 1404
1788c346
YW		 1405 link_assign_netdev(link);
1406
db68e990
YW		 1407 if (link->manager->state != MANAGER_RUNNING)
1408 return 0;
1409
4faca0a3 1410 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1411 return 0;
1412
78f8d5ed
YW		 1413 r = link_managed_by_us(link);
1414 if (r <= 0)
1415 return r;
1416
170e88c8 1417 r = link_get_network(link, &network);
5a1ef6df
YW		 1418 if (r == -ENOENT) {
1419 link_enter_unmanaged(link);
1420 return 0;
1421 }
1422 if (r < 0)
ad932b15
YW		 1423 return r;
1424
2b07a321 1425 if (link->network == network && !FLAGS_SET(flags, LINK_RECONFIGURE_UNCONDITIONALLY))
ad932b15
YW		 1426 return 0;
1427
5a1ef6df
YW		 1428 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1429 if (link->network)
1430 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1431 network->filename,
1432 isempty(joined) ? "" : " (dropins: ",
1433 joined,
1434 isempty(joined) ? "" : ")");
1435 else
1436 log_link_info(link, "Configuring with %s%s%s%s.",
1437 network->filename,
1438 isempty(joined) ? "" : " (dropins: ",
1439 joined,
1440 isempty(joined) ? "" : ")");
ad932b15 1441
82df2e0f 1442 /* Dropping configurations based on the old .network file. */
451c2baf
YW		 1443 r = link_drop_requests(link);
1444 if (r < 0)
1445 return r;
1446
3cf58ef3
YW		 1447 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1448 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1449 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1450 * map here, as it depends on .network files assigned to other links. */
1451 link_free_bound_to_list(link);
1452
82df2e0f 1453 _cleanup_(network_unrefp) Network *old_network = TAKE_PTR(link->network);
ad932b15
YW		 1454
1455 /* Then, apply new .network file */
9092113d 1456 link->network = network_ref(network);
82df2e0f 1457
80a89d1a 1458 if (FLAGS_SET(network->keep_configuration, KEEP_CONFIGURATION_DYNAMIC) ||
82df2e0f
YW		 1459 !FLAGS_SET(flags, LINK_RECONFIGURE_CLEANLY)) {
1460 /* To make 'networkctl reconfigure INTERFACE' work safely for an interface whose new .network
80a89d1a 1461 * file has KeepConfiguration=dynamic or yes, even if a clean reconfiguration is requested,
82df2e0f
YW		 1462 * drop only unnecessary or possibly being changed dynamic configurations here. */
1463 r = link_drop_dynamic_config(link, old_network);
1464 if (r < 0)
1465 return r;
1466 } else {
1467 /* Otherwise, stop DHCP client and friends unconditionally, and drop all dynamic
1468 * configurations like DHCP address and routes. */
b72c29b6 1469 r = link_stop_engines(link, /* may_keep_dynamic = */ false);
82df2e0f
YW		 1470 if (r < 0)
1471 return r;
1472
1473 /* Free DHCP client and friends. */
1474 link_free_engines(link);
1475 }
1476
b156a95d 1477 link_update_operstate(link, true);
9092113d 1478 link_dirty(link);
ad932b15 1479
ad932b15 1480 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1481 link->activated = false;
ad932b15 1482
ad932b15
YW		 1483 r = link_configure(link);
1484 if (r < 0)
1485 return r;
1486
0e397560 1487 return 1;
ad932b15
YW		 1488}
1489
2b07a321 1490typedef struct LinkReconfigurationData {
9ad294ef 1491 Manager *manager;
1e869a5d 1492 Link *link;
2b07a321 1493 LinkReconfigurationFlag flags;
1e869a5d 1494 sd_bus_message *message;
2b07a321
YW		 1495 unsigned *counter;
1496} LinkReconfigurationData;
1e869a5d 1497
2b07a321 1498static LinkReconfigurationData* link_reconfiguration_data_free(LinkReconfigurationData *data) {
ebf66d0c
YW		 1499 if (!data)
1500 return NULL;
1501
1502 link_unref(data->link);
1503 sd_bus_message_unref(data->message);
1504
1505 return mfree(data);
1506}
1507
2b07a321 1508DEFINE_TRIVIAL_CLEANUP_FUNC(LinkReconfigurationData*, link_reconfiguration_data_free);
ebf66d0c 1509
2b07a321 1510static void link_reconfiguration_data_destroy_callback(LinkReconfigurationData *data) {
1e869a5d
YW		 1511 int r;
1512
1513 assert(data);
1e869a5d 1514
2b07a321
YW		 1515 if (data->message) {
1516 if (data->counter) {
1517 assert(*data->counter > 0);
1518 (*data->counter)--;
1519 }
1520
1521 if (!data->counter || *data->counter <= 0) {
9ad294ef
YW		 1522 /* Update the state files before replying the bus method. Otherwise,
1523 * systemd-networkd-wait-online following networkctl reload/reconfigure may read an
1524 * outdated state file and wrongly handle an interface is already in the configured
1525 * state. */
1526 (void) manager_clean_all(data->manager);
1527
2b07a321
YW		 1528 r = sd_bus_reply_method_return(data->message, NULL);
1529 if (r < 0)
1530 log_warning_errno(r, "Failed to reply for DBus method, ignoring: %m");
1531 }
1e869a5d
YW		 1532 }
1533
2b07a321 1534 link_reconfiguration_data_free(data);
1e869a5d
YW		 1535}
1536
2b07a321
YW		 1537static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, LinkReconfigurationData *data) {
1538 Link *link = ASSERT_PTR(ASSERT_PTR(data)->link);
1539 int r;
1540
1541 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1542 if (r <= 0)
1543 return r;
1544
1545 r = link_reconfigure_impl(link, data->flags);
1546 if (r < 0) {
1547 link_enter_failed(link);
1548 return 0;
1549 }
1550
1551 return r;
1e869a5d
YW		 1552}
1553
2b07a321 1554int link_reconfigure_full(Link *link, LinkReconfigurationFlag flags, sd_bus_message *message, unsigned *counter) {
1e869a5d 1555 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2b07a321 1556 _cleanup_(link_reconfiguration_data_freep) LinkReconfigurationData *data = NULL;
1e869a5d
YW		 1557 int r;
1558
1559 assert(link);
1560 assert(link->manager);
1561 assert(link->manager->rtnl);
1e869a5d 1562
2b07a321
YW		 1563 /* When the link is in the pending or initialized state, link_reconfigure_impl() will be called later
1564 * by link_initialized() or link_initialized_and_synced(). To prevent the function from being called
1565 * multiple times simultaneously, let's refuse to reconfigure the interface here in such cases. */
1e869a5d 1566 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
2b07a321 1567 return 0; /* 0 means no-op. */
1e869a5d 1568
2b07a321 1569 data = new(LinkReconfigurationData, 1);
021d39d3
YW		 1570 if (!data) {
1571 r = -ENOMEM;
1572 goto failed;
1573 }
1e869a5d 1574
2b07a321 1575 *data = (LinkReconfigurationData) {
9ad294ef 1576 .manager = link->manager,
1e869a5d 1577 .link = link_ref(link),
2b07a321
YW		 1578 .flags = flags,
1579 .message = sd_bus_message_ref(message), /* message may be NULL, but _ref() works fine. */
1580 .counter = counter,
1e869a5d
YW		 1581 };
1582
ebf66d0c
YW		 1583 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
1584 if (r < 0)
021d39d3 1585 goto failed;
ebf66d0c
YW		 1586
1587 r = netlink_call_async(link->manager->rtnl, NULL, req,
2b07a321
YW		 1588 link_reconfigure_handler,
1589 link_reconfiguration_data_destroy_callback, data);
ebf66d0c 1590 if (r < 0)
021d39d3 1591 goto failed;
1e869a5d
YW		 1592
1593 TAKE_PTR(data);
2b07a321
YW		 1594 if (counter)
1595 (*counter)++;
ebf66d0c 1596
685fd0d7
YW		 1597 if (link->state == LINK_STATE_FAILED)
1598 link_set_state(link, LINK_STATE_INITIALIZED);
1599
2b07a321 1600 return 1; /* 1 means the interface will be reconfigured, and bus method will be replied later. */
021d39d3
YW		 1601
1602failed:
1603 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
1604 link_enter_failed(link);
1605 return r;
1e869a5d
YW		 1606}
1607
e6bf7774 1608static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1609 int r;
1610
1611 assert(link);
505f8da7
TG		 1612 assert(link->manager);
1613
40695457
YW		 1614 if (link->state == LINK_STATE_PENDING) {
1615 log_link_debug(link, "Link state is up-to-date");
1616 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1617
40695457
YW		 1618 r = link_new_bound_by_list(link);
1619 if (r < 0)
1620 return r;
0d4ad91d 1621
40695457
YW		 1622 r = link_handle_bound_by_list(link);
1623 if (r < 0)
1624 return r;
1625 }
0d4ad91d 1626
2b07a321 1627 return link_reconfigure_impl(link, /* flags = */ 0);
505f8da7
TG		 1628}
1629
302a796f 1630static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1631 int r;
1632
5a1860f7
YW		 1633 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1634 if (r <= 0)
0b54c870 1635 return r;
572b21d9 1636
4ff296b0
YW		 1637 r = link_initialized_and_synced(link);
1638 if (r < 0)
1639 link_enter_failed(link);
5a1860f7
YW		 1640
1641 return 0;
e6bf7774
YW		 1642}
1643
3be9d62a 1644static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1645 int r;
1646
4f561e8e 1647 assert(link);
4f561e8e
TG		 1648 assert(device);
1649
160203e9
YW		 1650 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1651 * or sysattrs) may be outdated. */
8de56fb3 1652 device_unref_and_replace(link->dev, device);
4f561e8e 1653
78f8d5ed
YW		 1654 r = link_managed_by_us(link);
1655 if (r <= 0)
1656 return r;
1657
3b1dbdf0
YW		 1658 if (link->dhcp_client) {
1659 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1660 if (r < 0)
1661 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1662 }
1663
1664 if (link->dhcp6_client) {
1665 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1666 if (r < 0)
1667 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1668 }
1669
b0ff6dea
YW		 1670 r = link_set_sr_iov_ifindices(link);
1671 if (r < 0)
1672 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1673
40695457 1674 if (link->state != LINK_STATE_PENDING)
2b07a321 1675 return link_reconfigure(link, /* flags = */ 0);
679b3605 1676
79008bdd 1677 log_link_debug(link, "udev initialized link");
4f561e8e 1678
3c9b8860
TG		 1679 /* udev has initialized the link, but we don't know if we have yet
1680 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1681 * when it returns we know that the pending NEWLINKs have already been
1682 * processed and that we are up-to-date */
4f561e8e 1683
5a1860f7 1684 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1685}
1686
9c402e3a 1687int link_check_initialized(Link *link) {
51517f9e 1688 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1689 int r;
505f8da7 1690
0d411b7f 1691 assert(link);
505f8da7 1692
82f52245 1693 if (!udev_available())
0d411b7f 1694 return link_initialized_and_synced(link);
852a3916
YW		 1695
1696 /* udev should be around */
0ac655a6 1697 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1698 if (r < 0) {
1699 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1700 return 0;
1701 }
1702
3df2b455 1703 r = device_is_processed(device);
0d411b7f 1704 if (r < 0)
3df2b455 1705 return log_link_warning_errno(link, r, "Could not determine whether the device is processed by udevd: %m");
852a3916
YW		 1706 if (r == 0) {
1707 /* not yet ready */
1708 log_link_debug(link, "link pending udev initialization...");
1709 return 0;
1710 }
1711
1712 r = device_is_renaming(device);
0d411b7f
YW		 1713 if (r < 0)
1714 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1715 if (r > 0) {
1716 log_link_debug(link, "Interface is being renamed, pending initialization.");
1717 return 0;
4f561e8e 1718 }
505f8da7 1719
0d411b7f 1720 return link_initialized(link, device);
a748b692
TG		 1721}
1722
1fd3ac1e 1723int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1724 int r, ifindex;
1fd3ac1e 1725 Link *link;
3be9d62a
YW		 1726
1727 assert(m);
1728 assert(device);
1729
3be9d62a 1730 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1731 if (r < 0)
1732 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1733
75255a8d
YW		 1734 r = link_get_by_index(m, ifindex, &link);
1735 if (r < 0) {
1736 /* This error is not critical, as the corresponding rtnl message may be received later. */
1737 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1738 return 0;
1739 }
1740
1741 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1742 * object here. It will be removed only when rtnetlink says so. */
1743 if (action == SD_DEVICE_REMOVE) {
1744 link->dev = sd_device_unref(link->dev);
1745 return 0;
1746 }
1747
3be9d62a 1748 r = device_is_renaming(device);
1fd3ac1e
YW		 1749 if (r < 0)
1750 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1751 if (r > 0) {
1fd3ac1e 1752 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1753 /* TODO:
1754 * What happens when a device is initialized, then soon renamed after that? When we detect
1755 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1756 return 0;
1757 }
1758
4b9a8c2b
YW		 1759 r = link_initialized(link, device);
1760 if (r < 0)
1761 link_enter_failed(link);
3be9d62a
YW		 1762
1763 return 0;
1764}
1765
9c0a72f9 1766static int link_carrier_gained(Link *link) {
2b07a321 1767 LinkReconfigurationFlag flags = 0;
9c0a72f9
TG		 1768 int r;
1769
1770 assert(link);
1771
07021ed4
YW		 1772 log_link_info(link, "Gained carrier");
1773
6706ce2f
YW		 1774 r = event_source_disable(link->carrier_lost_timer);
1775 if (r < 0)
1776 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1777
36b8ad08
YW		 1778 /* Process BindCarrier= setting specified by other interfaces. This is independent of the .network
1779 * file assigned to this interface, but depends on .network files assigned to other interfaces.
1780 * Hence, this can and should be called earlier. */
1781 r = link_handle_bound_by_list(link);
1782 if (r < 0)
1783 return r;
1784
d9910948
YW		 1785 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1786 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1787 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1788 * restarted, and the correct network information will be gained.
1789 *
1790 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1791 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1792 * already assigned to the interface (in that case, the .network file does not have the SSID=
1793 * setting in the [Match] section), and the interface is already being configured. Of course,
1794 * there may exist another .network file with higher priority and a matching SSID= setting. But
2b07a321 1795 * in that case, link_reconfigure_impl() can handle that without any flags.
d9910948 1796 *
6706ce2f 1797 * For non-wireless interfaces, we have no way to detect the connected network change. So,
2b07a321
YW		 1798 * we do not set any flags here. Note, both ssid and previous_ssid are NULL in that case. */
1799 if (link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid))
6e0c9b7d 1800 flags |= LINK_RECONFIGURE_UNCONDITIONALLY | LINK_RECONFIGURE_CLEANLY;
6706ce2f
YW		 1801 link->previous_ssid = mfree(link->previous_ssid);
1802
986b2514
AŠ		 1803 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1804 * profile wants to match on it with SSID= in its [Match] section.
1805 */
1806 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1807 r = link_get_wlan_interface(link);
1808 if (r < 0)
1809 return r;
1810 }
1811
081466bd
YW		 1812 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1813 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1814 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
2b07a321 1815 r = link_reconfigure_impl(link, flags);
081466bd
YW		 1816 if (r != 0)
1817 return r;
b7ac1284 1818
600b7898
YW		 1819 if (link->iftype == ARPHRD_CAN)
1820 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1821 return 0;
600b7898 1822
b9ea3d2e 1823 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1824 r = link_acquire_dynamic_conf(link);
f0269653 1825 if (r < 0)
9c0a72f9 1826 return r;
6fc25497 1827
97108953 1828 r = link_request_static_configs(link);
6fc25497
SS		 1829 if (r < 0)
1830 return r;
9c0a72f9
TG		 1831 }
1832
aa9117c0 1833 return 0;
9c0a72f9
TG		 1834}
1835
6706ce2f 1836static int link_carrier_lost_impl(Link *link) {
e8eaed02 1837 int ret = 0;
6706ce2f
YW		 1838
1839 assert(link);
1840
1841 link->previous_ssid = mfree(link->previous_ssid);
1842
e8eaed02
YW		 1843 ret = link_handle_bound_by_list(link);
1844
6706ce2f 1845 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
e8eaed02 1846 return ret;
6706ce2f
YW		 1847
1848 if (!link->network)
e8eaed02 1849 return ret;
6706ce2f 1850
80a89d1a 1851 RET_GATHER(ret, link_stop_engines(link, /* may_keep_dynamic = */ false));
dd6d53a8 1852 RET_GATHER(ret, link_drop_static_config(link));
6706ce2f
YW		 1853
1854 return ret;
1855}
1856
1857static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1858 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1859 int r;
1860
6706ce2f
YW		 1861 r = link_carrier_lost_impl(link);
1862 if (r < 0) {
1863 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1864 link_enter_failed(link);
1865 }
1866
1867 return 0;
1868}
1869
9c0a72f9 1870static int link_carrier_lost(Link *link) {
b7326069
YW		 1871 uint16_t dhcp_mtu;
1872 usec_t usec;
9c0a72f9
TG		 1873
1874 assert(link);
1875
07021ed4
YW		 1876 log_link_info(link, "Lost carrier");
1877
600b7898
YW		 1878 if (link->iftype == ARPHRD_CAN)
1879 /* let's shortcut things for CAN which doesn't need most of what's done below. */
e8eaed02 1880 usec = 0;
aa9117c0 1881
e8eaed02
YW		 1882 else if (!link->network)
1883 usec = 0;
f1c22cf4 1884
e8eaed02 1885 else if (link->network->ignore_carrier_loss_set)
b7326069
YW		 1886 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1887 usec = link->network->ignore_carrier_loss_usec;
1888
1889 else if (link->network->bond && link->wlan_iftype > 0)
1890 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1891 * carrier to be lost. See #19832. */
1892 usec = 3 * USEC_PER_SEC;
1893
1894 else if (link->network->dhcp_use_mtu &&
1895 link->dhcp_lease &&
1896 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1897 dhcp_mtu != link->original_mtu)
1898 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1899 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1900 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1901 usec = 5 * USEC_PER_SEC;
1902
1903 else
27438545 1904 /* Otherwise, use the implied default value. */
b7326069
YW		 1905 usec = link->network->ignore_carrier_loss_usec;
1906
1907 if (usec == USEC_INFINITY)
aa9117c0 1908 return 0;
600b7898 1909
b7326069 1910 if (usec == 0)
6706ce2f
YW		 1911 return link_carrier_lost_impl(link);
1912
1913 return event_reset_time_relative(link->manager->event,
1914 &link->carrier_lost_timer,
ba4e0427 1915 CLOCK_BOOTTIME,
b7326069 1916 usec,
6706ce2f
YW		 1917 0,
1918 link_carrier_lost_handler,
1919 link,
1920 0,
1921 "link-carrier-loss",
1922 true);
0c9ee5d5
YW		 1923}
1924
0c9ee5d5 1925static int link_admin_state_up(Link *link) {
0c9ee5d5
YW		 1926 assert(link);
1927
1928 /* This is called every time an interface admin state changes to up;
1929 * specifically, when IFF_UP flag changes from unset to set. */
1930
07021ed4
YW		 1931 log_link_info(link, "Link UP");
1932
0c9ee5d5
YW		 1933 if (!link->network)
1934 return 0;
1935
899b0e5e 1936 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1937 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1938 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1939 }
1940
1941 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1942 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
7edfbf41 1943 (void) link_set_ipv6_mtu(link, LOG_INFO);
0c9ee5d5
YW		 1944
1945 return 0;
1946}
1947
1948static int link_admin_state_down(Link *link) {
1949 assert(link);
1950
07021ed4
YW		 1951 log_link_info(link, "Link DOWN");
1952
688f1669 1953 link_forget_nexthops(link);
6954c38c
YW		 1954 link_forget_routes(link);
1955
0c9ee5d5
YW		 1956 if (!link->network)
1957 return 0;
1958
899b0e5e 1959 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1960 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1961 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1962 }
1963
1964 return 0;
1965}
1966
0c9ee5d5
YW		 1967static bool link_is_enslaved(Link *link) {
1968 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1969 return true;
1970
1f024462 1971 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1972 return true;
1973
0c9ee5d5
YW		 1974 return false;
1975}
1976
0c9ee5d5
YW		 1977void link_update_operstate(Link *link, bool also_update_master) {
1978 LinkOperationalState operstate;
1979 LinkCarrierState carrier_state;
1980 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1981 LinkOnlineState online_state;
1982 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1983 bool changed = false;
0c9ee5d5
YW		 1984
1985 assert(link);
1986
1987 if (link->kernel_operstate == IF_OPER_DORMANT)
1988 carrier_state = LINK_CARRIER_STATE_DORMANT;
1989 else if (link_has_carrier(link)) {
1990 if (link_is_enslaved(link))
1991 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1992 else
1993 carrier_state = LINK_CARRIER_STATE_CARRIER;
1994 } else if (link->flags & IFF_UP)
1995 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1996 else
1997 carrier_state = LINK_CARRIER_STATE_OFF;
1998
1999 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
2000 Link *slave;
2001
2002 SET_FOREACH(slave, link->slaves) {
2003 link_update_operstate(slave, false);
2004
2005 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
2006 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
2007 }
2008 }
2009
60415c13 2010 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 2011
2012 /* Mapping of address and carrier state vs operational state
2013 * carrier state
2014 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
2015 * ------------------------------------------------------------------------------
2016 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 2017 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
2018 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 2019 */
2020
cf4dbd84
HH		 2021 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
2022 operstate = LINK_OPERSTATE_ROUTABLE;
2023 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
2024 operstate = LINK_OPERSTATE_DEGRADED;
2025 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 2026 operstate = (LinkOperationalState) carrier_state;
2027 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
2028 operstate = LINK_OPERSTATE_ROUTABLE;
2029 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
2030 operstate = LINK_OPERSTATE_DEGRADED;
2031 else
2032 operstate = LINK_OPERSTATE_ENSLAVED;
2033
2278d9f6
YW		 2034 LinkOperationalStateRange req;
2035 link_required_operstate_for_online(link, &req);
2036
0c9ee5d5
YW		 2037 /* Only determine online state for managed links with RequiredForOnline=yes */
2038 if (!link->network || !link->network->required_for_online)
2039 online_state = _LINK_ONLINE_STATE_INVALID;
2278d9f6
YW		 2040
2041 else if (!operational_state_is_in_range(operstate, &req))
0c9ee5d5 2042 online_state = LINK_ONLINE_STATE_OFFLINE;
2278d9f6 2043
0c9ee5d5 2044 else {
a853cc99 2045 AddressFamily required_family = link_required_family_for_online(link);
0c9ee5d5
YW		 2046 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
2047 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
2048
2049 /* The operational state is within the range required for online.
2050 * If a particular address family is also required, we might revert
2051 * to offline in the blocks below. */
2052 online_state = LINK_ONLINE_STATE_ONLINE;
2053
2278d9f6 2054 if (req.min >= LINK_OPERSTATE_DEGRADED) {
0c9ee5d5
YW		 2055 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
2056 online_state = LINK_ONLINE_STATE_OFFLINE;
2057 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
2058 online_state = LINK_ONLINE_STATE_OFFLINE;
2059 }
2060
2278d9f6 2061 if (req.min >= LINK_OPERSTATE_ROUTABLE) {
0c9ee5d5
YW		 2062 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2063 online_state = LINK_ONLINE_STATE_OFFLINE;
2064 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2065 online_state = LINK_ONLINE_STATE_OFFLINE;
2066 }
2067 }
2068
2069 if (link->carrier_state != carrier_state) {
2070 link->carrier_state = carrier_state;
2071 changed = true;
2072 if (strv_extend(&p, "CarrierState") < 0)
2073 log_oom();
2074 }
2075
2076 if (link->address_state != address_state) {
2077 link->address_state = address_state;
2078 changed = true;
2079 if (strv_extend(&p, "AddressState") < 0)
2080 log_oom();
2081 }
0d4ad91d 2082
0c9ee5d5
YW		 2083 if (link->ipv4_address_state != ipv4_address_state) {
2084 link->ipv4_address_state = ipv4_address_state;
2085 changed = true;
2086 if (strv_extend(&p, "IPv4AddressState") < 0)
2087 log_oom();
2088 }
9c0a72f9 2089
0c9ee5d5
YW		 2090 if (link->ipv6_address_state != ipv6_address_state) {
2091 link->ipv6_address_state = ipv6_address_state;
2092 changed = true;
2093 if (strv_extend(&p, "IPv6AddressState") < 0)
2094 log_oom();
2095 }
9c0a72f9 2096
0c9ee5d5
YW		 2097 if (link->operstate != operstate) {
2098 link->operstate = operstate;
2099 changed = true;
2100 if (strv_extend(&p, "OperationalState") < 0)
2101 log_oom();
2102 }
9c0a72f9 2103
0c9ee5d5
YW		 2104 if (link->online_state != online_state) {
2105 link->online_state = online_state;
2106 changed = true;
2107 if (strv_extend(&p, "OnlineState") < 0)
2108 log_oom();
2109 }
9c0a72f9 2110
0c9ee5d5
YW		 2111 if (p)
2112 link_send_changed_strv(link, p);
2113 if (changed)
2114 link_dirty(link);
9c0a72f9 2115
0c9ee5d5
YW		 2116 if (also_update_master) {
2117 Link *master;
9c0a72f9 2118
0c9ee5d5
YW		 2119 if (link_get_master(link, &master) >= 0)
2120 link_update_operstate(master, true);
2121 }
9c0a72f9
TG		 2122}
2123
baa3fadf
DDM		 2124bool link_has_carrier(Link *link) {
2125 assert(link);
2126 return netif_has_carrier(link->kernel_operstate, link->flags);
2127}
2128
291b6fee
YW		 2129bool link_multicast_enabled(Link *link) {
2130 assert(link);
2131
2132 /* If Multicast= is specified, use the value. */
2133 if (link->network && link->network->multicast >= 0)
2134 return link->network->multicast;
2135
2136 /* Otherwise, return the current state. */
2137 return FLAGS_SET(link->flags, IFF_MULTICAST);
2138}
2139
0c9ee5d5
YW		 2140#define FLAG_STRING(string, flag, old, new) \
2141 (((old ^ new) & flag) \
2142 ? ((old & flag) ? (" -" string) : (" +" string)) \
2143 : "")
2144
0d411b7f 2145static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 2146 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 2147 uint8_t operstate;
2148 unsigned flags;
d236718c
DS		 2149 int r;
2150
61135582 2151 assert(link);
0d411b7f 2152 assert(message);
61135582 2153
0d411b7f 2154 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 2155 if (r < 0)
0d411b7f 2156 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 2157
0d411b7f
YW		 2158 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
2159 if (r == -ENODATA)
2160 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 2161 operstate = link->kernel_operstate;
0d411b7f
YW		 2162 else if (r < 0)
2163 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 2164
0d411b7f 2165 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 2166 return 0;
2167
0c9ee5d5
YW		 2168 if (link->flags != flags) {
2169 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 2170
0c9ee5d5
YW		 2171 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",
2172 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
2173 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
2174 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
2175 FLAG_STRING("UP", IFF_UP, link->flags, flags),
2176 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
2177 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
2178 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
2179 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
2180 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
2181 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
2182 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
2183 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
2184 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
2185 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
2186 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
2187 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
2188 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
2189 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
2190 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 2191
0c9ee5d5
YW		 2192 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
2193 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
2194 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
2195 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
2196 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
2197 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
2198 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
2199 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 2200
0c9ee5d5
YW		 2201 if (unknown_flags_added)
2202 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 2203
0c9ee5d5
YW		 2204 if (unknown_flags_removed)
2205 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
2206 }
61135582 2207
0d411b7f
YW		 2208 link_was_admin_up = link->flags & IFF_UP;
2209 had_carrier = link_has_carrier(link);
2210
0c9ee5d5
YW		 2211 link->flags = flags;
2212 link->kernel_operstate = operstate;
36161cba 2213
0c9ee5d5 2214 link_update_operstate(link, true);
61135582 2215
07021ed4 2216 r = 0;
22936833 2217
07021ed4 2218 if (!link_was_admin_up && (link->flags & IFF_UP))
0d411b7f 2219 r = link_admin_state_up(link);
07021ed4 2220 else if (link_was_admin_up && !(link->flags & IFF_UP))
0d411b7f 2221 r = link_admin_state_down(link);
07021ed4
YW		 2222 if (r < 0)
2223 return r;
0d4ad91d 2224
07021ed4 2225 if (!had_carrier && link_has_carrier(link))
0d411b7f 2226 r = link_carrier_gained(link);
07021ed4 2227 else if (had_carrier && !link_has_carrier(link))
3f9db926 2228 r = link_carrier_lost(link);
07021ed4
YW		 2229 if (r < 0)
2230 return r;
b8941f74 2231
0d411b7f
YW		 2232 return 0;
2233}
afe7fd56 2234
0d411b7f
YW		 2235static int link_update_master(Link *link, sd_netlink_message *message) {
2236 int master_ifindex, r;
7465dd22 2237
0d411b7f
YW		 2238 assert(link);
2239 assert(message);
69629de9 2240
0d411b7f
YW		 2241 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2242 if (r == -ENODATA)
f44b20b7
YW		 2243 master_ifindex = 0; /* no master interface */
2244 else if (r < 0)
0d411b7f 2245 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2246
571bf1aa
YW		 2247 if (master_ifindex == link->ifindex)
2248 master_ifindex = 0;
2249
74e95e3a
YW		 2250 if (master_ifindex != link->master_ifindex) {
2251 if (link->master_ifindex == 0)
2252 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
2253 else if (master_ifindex == 0)
2254 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
2255 else
2256 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
1ae9b0cf 2257 glyph(GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2258
74e95e3a
YW		 2259 link_drop_from_master(link);
2260 link->master_ifindex = master_ifindex;
7dde00ca
YW		 2261
2262 /* Updating master ifindex may cause operational state change, e.g. carrier <-> enslaved */
2263 link_dirty(link);
74e95e3a 2264 }
413708d1 2265
0d411b7f
YW		 2266 r = link_append_to_master(link);
2267 if (r < 0)
2268 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2269
0d411b7f
YW		 2270 return 0;
2271}
807667f7 2272
e1658632
YW		 2273static int link_update_driver(Link *link, sd_netlink_message *message) {
2274 int r;
2275
2276 assert(link);
2277 assert(link->manager);
2278 assert(message);
2279
2280 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2281 if (link->ethtool_driver_read)
e1658632
YW		 2282 return 0;
2283
2284 /* When udevd is running, read the driver after the interface is initialized by udevd.
2285 * Otherwise, ethtool may not work correctly. See issue #22538.
2286 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2287 if (udev_available() && !link->dev)
e1658632
YW		 2288 return 0;
2289
6625c39e
YW		 2290 link->ethtool_driver_read = true;
2291
e1658632
YW		 2292 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2293 if (r < 0) {
2294 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2295 return 0;
2296 }
2297
2298 log_link_debug(link, "Found driver: %s", strna(link->driver));
2299
2300 if (streq_ptr(link->driver, "dsa")) {
2301 uint32_t dsa_master_ifindex = 0;
2302
2303 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2304 if (r < 0 && r != -ENODATA)
2305 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2306
2307 if (dsa_master_ifindex > INT_MAX) {
2308 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2309 dsa_master_ifindex);
2310 dsa_master_ifindex = 0;
2311 }
2312
2313 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2314 }
2315
40695457 2316 return 1; /* needs reconfigure */
e1658632
YW		 2317}
2318
6625c39e 2319static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2320 int r;
2321
2322 assert(link);
2323 assert(link->manager);
2324 assert(message);
2325
6625c39e 2326 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2327 return 0;
2328
2329 /* When udevd is running, read the permanent hardware address after the interface is
2330 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2331 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2332 if (udev_available() && !link->dev)
2333 return 0;
2334
2335 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2336 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2337 if (r == -ENODATA)
2338 return 0;
2339 if (r < 0)
2340 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2341
2342 link->ethtool_permanent_hw_addr_read = true;
2343
2344 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2345 if (r < 0)
2346 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2347
2348 return 0;
2349}
2350
2351static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2352 int r;
2353
2354 assert(link);
2355 assert(link->manager);
2356 assert(message);
2357
2358 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2359 return 0;
2360
2361 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2362 if (r < 0) {
2363 if (r != -ENODATA)
2364 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2365
0d73214c 2366 /* Fallback to ethtool for kernels older than v5.6 (f74877a5457d34d604dba6dbbb13c4c05bac8b93). */
6625c39e
YW		 2367 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2368 if (r < 0)
2369 return r;
e1658632
YW		 2370 }
2371
2372 if (link->permanent_hw_addr.length > 0)
2373 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2374
40695457 2375 return 1; /* needs reconfigure */
e1658632
YW		 2376}
2377
0d411b7f 2378static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2379 struct hw_addr_data addr;
0d411b7f 2380 int r;
d93d655c 2381
0d411b7f
YW		 2382 assert(link);
2383 assert(message);
dfc58b47 2384
0d411b7f
YW		 2385 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2386 if (r < 0 && r != -ENODATA)
2387 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2388
e2bacccd 2389 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2390 if (r == -ENODATA)
2391 return 0;
2392 if (r < 0)
fe321d45 2393 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2394
e2bacccd 2395 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2396 return 0;
a61bb41c 2397
de0f1579 2398 if (link->hw_addr.length == 0)
e2bacccd 2399 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2400 else {
e2341b6b
DT		 2401 log_link_debug(link, "Hardware address is changed: %s %s %s",
2402 HW_ADDR_TO_STR(&link->hw_addr),
1ae9b0cf 2403 glyph(GLYPH_ARROW_RIGHT),
e2341b6b 2404 HW_ADDR_TO_STR(&addr));
0d411b7f 2405
e74f1d07 2406 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2407 }
2408
e2bacccd
YW		 2409 link->hw_addr = addr;
2410
fe321d45
YW		 2411 if (!hw_addr_is_null(&link->hw_addr)) {
2412 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2413 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2414 /* bonding master and its slaves have the same hardware address. */
2415 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2416 if (r < 0)
2417 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2418 }
0d411b7f 2419
0a14f83a 2420 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2421 if (r < 0)
2422 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2423
0d411b7f 2424 r = ipv4ll_update_mac(link);
a61bb41c 2425 if (r < 0)
0d411b7f 2426 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2427
0d411b7f
YW		 2428 r = dhcp4_update_mac(link);
2429 if (r < 0)
2430 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2431
0d411b7f
YW		 2432 r = dhcp6_update_mac(link);
2433 if (r < 0)
2434 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2435
2436 r = radv_update_mac(link);
2437 if (r < 0)
2438 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2439
3be64aa4 2440 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2441 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2442 if (r < 0)
0d411b7f
YW		 2443 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2444 }
d236718c 2445
35778343
YW		 2446 if (link->lldp_rx) {
2447 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2448 if (r < 0)
c01b9b87
YW		 2449 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2450 }
2451
2452 if (link->lldp_tx) {
2453 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2454 if (r < 0)
2455 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2456 }
2457
40695457 2458 return 1; /* needs reconfigure */
0d411b7f 2459}
a61bb41c 2460
0d411b7f 2461static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2462 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2463 int r;
a61bb41c 2464
0d411b7f
YW		 2465 assert(link);
2466 assert(message);
2467
2468 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2469 if (r == -ENODATA)
2470 return 0;
2471 if (r < 0)
2472 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2473 if (mtu == 0)
2474 return 0;
0d411b7f 2475
717ba5fc
YW		 2476 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2477 if (r < 0 && r != -ENODATA)
2478 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2479
2480 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2481 if (r < 0 && r != -ENODATA)
2482 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2483
717ba5fc
YW		 2484 if (max_mtu == 0)
2485 max_mtu = UINT32_MAX;
2486
2487 link->min_mtu = min_mtu;
2488 link->max_mtu = max_mtu;
2489
0d411b7f
YW		 2490 if (link->original_mtu == 0) {
2491 link->original_mtu = mtu;
717ba5fc
YW		 2492 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2493 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2494 }
2495
717ba5fc
YW		 2496 if (link->mtu == mtu)
2497 return 0;
2498
b5d0fd1e 2499 if (link->mtu != 0)
e2341b6b 2500 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
1ae9b0cf 2501 link->mtu, glyph(GLYPH_ARROW_RIGHT), mtu,
e2341b6b 2502 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2503
2504 link->mtu = mtu;
2505
7edfbf41 2506 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
eb426caa 2507 /* The kernel resets IPv6 MTU after changing device MTU. So, we need to re-set IPv6 MTU again. */
39283a1f 2508 (void) link_set_ipv6_mtu_async(link);
eb426caa 2509
0d411b7f
YW		 2510 if (link->dhcp_client) {
2511 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2512 if (r < 0)
0d411b7f
YW		 2513 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2514 }
a61bb41c 2515
0d411b7f
YW		 2516 if (link->radv) {
2517 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2518 if (r < 0)
0d411b7f 2519 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2520 }
2521
2522 return 0;
dd3efc09 2523}
fe8db0c5 2524
0d411b7f
YW		 2525static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2526 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2527 int r;
2528
2529 assert(link);
2530 assert(message);
2531
2532 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2533 if (r == -ENODATA)
2368ff81 2534 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2535 * interface has no alternative name. */
2536 return 0;
2537 if (r < 0)
0d411b7f
YW		 2538 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2539
1b345c1e
YW		 2540 if (strv_equal(altnames, link->alternative_names))
2541 return 0;
2542
0d411b7f
YW		 2543 STRV_FOREACH(n, link->alternative_names)
2544 hashmap_remove(link->manager->links_by_name, *n);
2545
2546 strv_free_and_replace(link->alternative_names, altnames);
2547
2548 STRV_FOREACH(n, link->alternative_names) {
2549 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2550 if (r < 0)
2551 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2552 }
2553
40695457 2554 return 1; /* needs reconfigure */
0d411b7f
YW		 2555}
2556
2557static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2558 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2559 const char *ifname;
2560 int r;
2561
2562 assert(link);
2563 assert(message);
2564
2565 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2566 if (r == -ENODATA)
7802194a 2567 /* Hmm?? But ok. */
0d411b7f
YW		 2568 return 0;
2569 if (r < 0)
2570 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2571
2572 if (streq(ifname, link->ifname))
2573 return 0;
2574
01afd0f7
YW		 2575 r = format_ifname(link->ifindex, ifname_from_index);
2576 if (r < 0)
2577 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2578
2579 if (!streq(ifname, ifname_from_index)) {
2580 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2581 "with the name currently configured on the actual interface '%s'. Ignoring.",
2582 ifname, ifname_from_index);
2583 return 0;
2584 }
2585
0d411b7f
YW		 2586 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2587
2588 hashmap_remove(link->manager->links_by_name, link->ifname);
2589
2590 r = free_and_strdup(&link->ifname, ifname);
2591 if (r < 0)
2592 return log_oom_debug();
2593
2594 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2595 if (r < 0)
2596 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2597
54d1fdb2
YW		 2598 if (link->dhcp_client) {
2599 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2600 if (r < 0)
2601 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2602 }
2603
2604 if (link->dhcp6_client) {
2605 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2606 if (r < 0)
e6c4b5dc 2607 return log_link_debug_errno(link, r, "Failed to update interface name in DHCPv6 client: %m");
54d1fdb2
YW		 2608 }
2609
2610 if (link->ndisc) {
2611 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2612 if (r < 0)
2613 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2614 }
2615
2616 if (link->dhcp_server) {
2617 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2618 if (r < 0)
2619 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2620 }
2621
2622 if (link->radv) {
2623 r = sd_radv_set_ifname(link->radv, link->ifname);
2624 if (r < 0)
2625 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2626 }
2627
35778343
YW		 2628 if (link->lldp_rx) {
2629 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2630 if (r < 0)
c01b9b87
YW		 2631 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2632 }
2633
2634 if (link->lldp_tx) {
2635 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2636 if (r < 0)
2637 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2638 }
2639
2640 if (link->ipv4ll) {
2641 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2642 if (r < 0)
2643 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2644 }
2645
86173383
YW		 2646 r = ipv4acd_set_ifname(link);
2647 if (r < 0)
2648 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2649
40695457 2650 return 1; /* needs reconfigure */
0d411b7f
YW		 2651}
2652
2653static int link_update(Link *link, sd_netlink_message *message) {
40695457 2654 bool needs_reconfigure = false;
0d411b7f
YW		 2655 int r;
2656
2657 assert(link);
2658 assert(message);
2659
2660 r = link_update_name(link, message);
2661 if (r < 0)
2662 return r;
40695457 2663 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2664
2665 r = link_update_alternative_names(link, message);
2666 if (r < 0)
2667 return r;
40695457 2668 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2669
2670 r = link_update_mtu(link, message);
2671 if (r < 0)
2672 return r;
2673
e1658632
YW		 2674 r = link_update_driver(link, message);
2675 if (r < 0)
2676 return r;
40695457 2677 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2678
2679 r = link_update_permanent_hardware_address(link, message);
2680 if (r < 0)
2681 return r;
40695457 2682 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2683
0d411b7f
YW		 2684 r = link_update_hardware_address(link, message);
2685 if (r < 0)
2686 return r;
40695457 2687 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2688
2689 r = link_update_master(link, message);
2690 if (r < 0)
2691 return r;
2692
7d0d832d
YW		 2693 r = link_update_ipv6ll_addrgen_mode(link, message);
2694 if (r < 0)
2695 return r;
2696
40695457
YW		 2697 r = link_update_flags(link, message);
2698 if (r < 0)
2699 return r;
2700
11cee6ef
YW		 2701 r = link_update_bridge_vlan(link, message);
2702 if (r < 0)
2703 return r;
2704
40695457 2705 return needs_reconfigure;
0d411b7f
YW		 2706}
2707
0c9ee5d5
YW		 2708static Link *link_drop_or_unref(Link *link) {
2709 if (!link)
2710 return NULL;
2711 if (!link->manager)
2712 return link_unref(link);
2713 return link_drop(link);
2714}
2715
2716DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2717
2718static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
5a0f6adb 2719 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL;
0c9ee5d5 2720 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2721 unsigned short iftype;
2722 int r, ifindex;
0c9ee5d5
YW		 2723
2724 assert(manager);
2725 assert(message);
2726 assert(ret);
2727
0c9ee5d5
YW		 2728 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2729 if (r < 0)
0d411b7f 2730 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2731 else if (ifindex <= 0)
0d411b7f 2732 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2733
2734 r = sd_rtnl_message_link_get_type(message, &iftype);
2735 if (r < 0)
0d411b7f 2736 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2737
2738 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2739 if (r < 0)
0d411b7f 2740 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2741
2742 /* check for link kind */
2743 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2744 if (r >= 0) {
0d411b7f
YW		 2745 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2746 if (r < 0 && r != -ENODATA)
2747 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2748 r = sd_netlink_message_exit_container(message);
2749 if (r < 0)
0d411b7f 2750 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2751 }
2752
4c78dc17
YW		 2753 if (!manager->test_mode) {
2754 /* Do not update state files when running in test mode. */
2755 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2756 return log_oom_debug();
0d411b7f 2757
4c78dc17
YW		 2758 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2759 return log_oom_debug();
4c78dc17 2760 }
0d411b7f 2761
0c9ee5d5
YW		 2762 link = new(Link, 1);
2763 if (!link)
2764 return -ENOMEM;
2765
2766 *link = (Link) {
2767 .n_ref = 1,
2768 .state = LINK_STATE_PENDING,
2769 .online_state = _LINK_ONLINE_STATE_INVALID,
c2eb7753 2770 .automatic_reconfigure_ratelimit = (const RateLimit) { .interval = 10 * USEC_PER_SEC, .burst = 5 },
0c9ee5d5
YW		 2771 .ifindex = ifindex,
2772 .iftype = iftype,
2773 .ifname = TAKE_PTR(ifname),
2774 .kind = TAKE_PTR(kind),
2775
11cee6ef
YW		 2776 .bridge_vlan_pvid = UINT16_MAX,
2777
7d0d832d
YW		 2778 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2779
0d411b7f
YW		 2780 .state_file = TAKE_PTR(state_file),
2781 .lease_file = TAKE_PTR(lease_file),
0d411b7f 2782
0c9ee5d5
YW		 2783 .n_dns = UINT_MAX,
2784 .dns_default_route = -1,
2785 .llmnr = _RESOLVE_SUPPORT_INVALID,
2786 .mdns = _RESOLVE_SUPPORT_INVALID,
2787 .dnssec_mode = _DNSSEC_MODE_INVALID,
2788 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2789 };
2790
4cf443e6 2791 r = hashmap_ensure_put(&manager->links_by_index, &link_hash_ops, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2792 if (r < 0)
0d411b7f 2793 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2794
2795 link->manager = manager;
2796
0d411b7f 2797 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2798 if (r < 0)
0d411b7f 2799 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2800
8a77e245
YW		 2801 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2802 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2803
9c5b8d46
AŠ		 2804 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2805 * message arrived too early. Request the wireless link information again.
2806 */
2807 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2808 r = link_get_wlan_interface(link);
2809 if (r < 0)
2810 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2811 }
2812
0c9ee5d5 2813 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2814 return 0;
2815}
2816
0d411b7f 2817int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2818 Link *link = NULL;
2819 NetDev *netdev = NULL;
2820 uint16_t type;
2821 const char *name;
2822 int r, ifindex;
2823
2824 assert(rtnl);
2825 assert(message);
0d411b7f 2826 assert(manager);
3be9d62a
YW		 2827
2828 if (sd_netlink_message_is_error(message)) {
2829 r = sd_netlink_message_get_errno(message);
2830 if (r < 0)
2831 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2832
2833 return 0;
2834 }
2835
2836 r = sd_netlink_message_get_type(message, &type);
2837 if (r < 0) {
2838 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2839 return 0;
2840 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2841 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2842 return 0;
2843 }
2844
2845 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2846 if (r < 0) {
2847 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2848 return 0;
2849 } else if (ifindex <= 0) {
2850 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2851 return 0;
2852 }
2853
2854 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2855 if (r < 0) {
2856 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2857 return 0;
2858 }
2859
6eab614d 2860 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2861 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2862
2863 switch (type) {
2864 case RTM_NEWLINK:
0d411b7f
YW		 2865 if (netdev) {
2866 /* netdev exists, so make sure the ifindex matches */
2867 r = netdev_set_ifindex(netdev, message);
2868 if (r < 0) {
66141164 2869 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
bc0d3f38 2870 netdev_enter_failed(netdev);
0d411b7f
YW		 2871 return 0;
2872 }
2873 }
2874
3be9d62a
YW		 2875 if (!link) {
2876 /* link is new, so add it */
0d411b7f 2877 r = link_new(manager, message, &link);
3be9d62a 2878 if (r < 0) {
0d411b7f 2879 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2880 return 0;
2881 }
3be9d62a 2882
0d411b7f 2883 r = link_update(link, message);
3be9d62a 2884 if (r < 0) {
66141164 2885 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2886 link_enter_failed(link);
3be9d62a
YW		 2887 return 0;
2888 }
3be9d62a 2889
30d5d11b
YW		 2890 if (link->manager->test_mode) {
2891 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
2892 link_set_state(link, LINK_STATE_UNMANAGED);
2893 return 0;
2894 }
2895
9c402e3a
YW		 2896 /* Do not enter initialized state if we are enumerating. */
2897 if (manager->enumerating)
2898 return 0;
2899
0d411b7f
YW		 2900 r = link_check_initialized(link);
2901 if (r < 0) {
66141164 2902 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2903 link_enter_failed(link);
2904 return 0;
2905 }
2906 } else {
2907 r = link_update(link, message);
2908 if (r < 0) {
66141164 2909 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2910 link_enter_failed(link);
2911 return 0;
2912 }
30d5d11b
YW		 2913 if (r == 0)
2914 return 0;
2915
2916 if (link->manager->test_mode) {
2917 log_link_debug(link, "Running in test mode, refusing to configure interface.");
2918 link_set_state(link, LINK_STATE_UNMANAGED);
2919 return 0;
2920 }
2921
9c402e3a
YW		 2922 /* Do not configure interface if we are enumerating. */
2923 if (manager->enumerating)
2924 return 0;
2925
2b07a321 2926 r = link_reconfigure_impl(link, /* flags = */ 0);
30d5d11b
YW		 2927 if (r < 0) {
2928 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2929 link_enter_failed(link);
2930 return 0;
40695457 2931 }
3be9d62a 2932 }
3be9d62a
YW		 2933 break;
2934
2935 case RTM_DELLINK:
2936 link_drop(link);
2937 netdev_drop(netdev);
3be9d62a
YW		 2938 break;
2939
2940 default:
04499a70 2941 assert_not_reached();
3be9d62a
YW		 2942 }
2943
2944 return 1;
2945}
2946
79c6e114
YW		 2947int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2948 uint16_t message_type;
2949 int r;
2950
2951 assert(m);
2952 assert(link);
2953 assert(error_msg);
2954
2955 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2956 return 0;
2957
2958 r = sd_netlink_message_get_errno(m);
2959 if (r < 0) {
d28746ef 2960 log_link_message_warning_errno(link, m, r, "%s", error_msg);
79c6e114
YW		 2961 link_enter_failed(link);
2962 return 0;
2963 }
2964
2965 r = sd_netlink_message_get_type(m, &message_type);
2966 if (r < 0) {
2967 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2968 return 0;
2969 }
2970 if (message_type != RTM_NEWLINK) {
2971 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2972 return 0;
2973 }
2974
2975 r = link_update(link, m);
2976 if (r < 0) {
2977 link_enter_failed(link);
2978 return 0;
2979 }
2980
2981 return 1;
2982}
2983
2984int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2985 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2986 int r;
2987
2988 assert(link);
2989 assert(link->manager);
2990 assert(link->manager->rtnl);
2991 assert(callback);
2992
2993 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2994 if (r < 0)
2995 return r;
2996
2997 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2998 link_netlink_destroy_callback, link);
2999 if (r < 0)
3000 return r;
3001
3002 link_ref(link);
3003 return 0;
3004}
3005
fe8db0c5 3006static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 3007 [LINK_STATE_PENDING] = "pending",
bd08ce56 3008 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3009 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 3010 [LINK_STATE_CONFIGURED] = "configured",
3011 [LINK_STATE_UNMANAGED] = "unmanaged",
3012 [LINK_STATE_FAILED] = "failed",
3013 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3014};
3015
3016DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 3017
3018int link_flags_to_string_alloc(uint32_t flags, char **ret) {
3019 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 3020 static const char* map[] = {
3021 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 3022 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 3023 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
3024 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
3025 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
3026 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
3027 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
3028 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
3029 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
3030 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
3031 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
3032 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 3033 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 3034 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
3035 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
3036 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
3037 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
3038 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
3039 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 3040 };
3041
3042 assert(ret);
3043
3044 for (size_t i = 0; i < ELEMENTSOF(map); i++)
1e4e5572 3045 if (BIT_SET(flags, i) && map[i])
19aa7eeb
ZJS		 3046 if (!strextend_with_separator(&str, ",", map[i]))
3047 return -ENOMEM;
7ae55b78
YW		 3048
3049 *ret = TAKE_PTR(str);
3050 return 0;
3051}
3052
3053static const char * const kernel_operstate_table[] = {
3054 [IF_OPER_UNKNOWN] = "unknown",
3055 [IF_OPER_NOTPRESENT] = "not-present",
3056 [IF_OPER_DOWN] = "down",
3057 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
3058 [IF_OPER_TESTING] = "testing",
3059 [IF_OPER_DORMANT] = "dormant",
3060 [IF_OPER_UP] = "up",
3061};
3062
3063DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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