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[thirdparty/systemd.git] / src / network / networkd-link.c
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db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
176b8be1 3#include <net/if.h>
9aa5d8ba 4#include <netinet/in.h>
f579559b 5#include <linux/if.h>
8f815e8b 6#include <linux/if_arp.h>
518cd6b5 7#include <linux/if_link.h>
2a0d07d6 8#include <linux/netdevice.h>
8430841b 9#include <sys/socket.h>
4cc7a82c 10#include <unistd.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
8a77e245 13#include "arphrd-util.h"
c0267a59 14#include "batadv.h"
737f1405
YW		 15#include "bond.h"
16#include "bridge.h"
1346b1f0 17#include "bus-util.h"
3be9d62a
YW		 18#include "device-private.h"
19#include "device-util.h"
27dfc982 20#include "dhcp-identifier.h"
bd91b83e 21#include "dhcp-lease-internal.h"
686d13b9 22#include "env-file.h"
4bb7cc82 23#include "ethtool-util.h"
6706ce2f 24#include "event-util.h"
3ffd4af2 25#include "fd-util.h"
cf1d700d 26#include "fileio.h"
176b8be1 27#include "format-util.h"
af664001 28#include "fs-util.h"
e2341b6b 29#include "glyph-util.h"
3ae6b3bf 30#include "logarithm.h"
ef118d00 31#include "missing_network.h"
cf1d700d 32#include "netlink-util.h"
c6f7c917 33#include "network-internal.h"
fb486c90 34#include "networkd-address-label.h"
093e3533 35#include "networkd-address.h"
9671ae9d 36#include "networkd-bridge-fdb.h"
ff9e0783 37#include "networkd-bridge-mdb.h"
11cee6ef 38#include "networkd-bridge-vlan.h"
3ddcbeea 39#include "networkd-can.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
YW		 47#include "networkd-link-bus.h"
48#include "networkd-link.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"
fc35a9f8 56#include "networkd-route-util.h"
3b6a3bde 57#include "networkd-route.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"
cf1d700d
TG		 64#include "set.h"
65#include "socket-util.h"
15a5e950 66#include "stdio-util.h"
8b43440b 67#include "string-table.h"
51517f9e 68#include "strv.h"
34658df2 69#include "tc.h"
e4de7287 70#include "tmpfile-util.h"
af7a86b8 71#include "tuntap.h"
299ad32d 72#include "udev-util.h"
737f1405 73#include "vrf.h"
fc2f9534 74
5e0534f1 75bool link_ipv6_enabled(Link *link) {
439689c6
SS		 76 assert(link);
77
78 if (!socket_ipv6_is_supported())
79 return false;
80
5fb5fae9 81 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 82 return false;
83
5fb5fae9
YW		 84 if (!link->network)
85 return false;
86
87 if (link->network->bond)
af9ba57a
YW		 88 return false;
89
bd7e0a3f 90 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 91 return true;
92
93 if (network_has_static_ipv6_configurations(link->network))
94 return true;
95
96 return false;
439689c6
SS		 97}
98
fc35a9f8
YW		 99bool link_has_ipv6_connectivity(Link *link) {
100 LinkAddressState ipv6_address_state;
101
102 assert(link);
103
104 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
105
106 switch (ipv6_address_state) {
107 case LINK_ADDRESS_STATE_ROUTABLE:
108 /* If the interface has a routable IPv6 address, then we assume yes. */
109 return true;
110
111 case LINK_ADDRESS_STATE_DEGRADED:
112 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
113 * there is an IPv6 default gateway. */
114 return link_has_default_gateway(link, AF_INET6);
115
116 case LINK_ADDRESS_STATE_OFF:
117 /* No IPv6 address. */
118 return false;
119
120 default:
121 assert_not_reached();
122 }
123}
124
e33232d4 125static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 126 assert(link);
127
d8d4db58
YW		 128 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
129 return false;
130
2fd3908b
YW		 131 if (!link->network)
132 return allow_unmanaged;
7191a57a 133
baa95d22
YW		 134 if (!link->network->configure_without_carrier) {
135 if (link->set_flags_messages > 0)
136 return false;
137
138 if (!link_has_carrier(link))
139 return false;
140 }
7191a57a 141
0fa8ee6c
YW		 142 if (link->set_link_messages > 0)
143 return false;
144
112a0972
YW		 145 if (!link->activated)
146 return false;
112a0972 147
7191a57a
YW		 148 return true;
149}
150
e33232d4
YW		 151bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
152 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
153}
154
15761549
YW		 155void link_ntp_settings_clear(Link *link) {
156 link->ntp = strv_free(link->ntp);
157}
158
159void link_dns_settings_clear(Link *link) {
f5fbe71d 160 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 161 for (unsigned i = 0; i < link->n_dns; i++)
162 in_addr_full_free(link->dns[i]);
15761549 163 link->dns = mfree(link->dns);
f5fbe71d 164 link->n_dns = UINT_MAX;
15761549 165
6e4571f0
YW		 166 link->search_domains = ordered_set_free(link->search_domains);
167 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 168
169 link->dns_default_route = -1;
170 link->llmnr = _RESOLVE_SUPPORT_INVALID;
171 link->mdns = _RESOLVE_SUPPORT_INVALID;
172 link->dnssec_mode = _DNSSEC_MODE_INVALID;
173 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
174
175 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
176}
177
1a6bb31f
YW		 178static void link_free_engines(Link *link) {
179 if (!link)
180 return;
181
182 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 183
1a6bb31f
YW		 184 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
185 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 186 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 187
35778343 188 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 189 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 190
5385e5f9
YW		 191 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
192
1a6bb31f 193 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 194
1a6bb31f 195 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 196 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 197
1a6bb31f 198 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 199 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
200 ndisc_flush(link);
201
1a6bb31f
YW		 202 link->radv = sd_radv_unref(link->radv);
203}
204
8301aa0b 205static Link *link_free(Link *link) {
8301aa0b 206 assert(link);
f579559b 207
15761549
YW		 208 link_ntp_settings_clear(link);
209 link_dns_settings_clear(link);
210
8eec0b9d 211 link->routes = set_free(link->routes);
8eec0b9d 212 link->neighbors = set_free(link->neighbors);
8eec0b9d 213 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 214 link->qdiscs = set_free(link->qdiscs);
215 link->tclasses = set_free(link->tclasses);
adda1ed9 216
a27588d4 217 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 218
1a6bb31f 219 link_free_engines(link);
49699bac 220
b0ff6dea 221 set_free(link->sr_iov_virt_port_ifindices);
c166a070 222 free(link->ifname);
572b21d9 223 strv_free(link->alternative_names);
ceac4078 224 free(link->kind);
8d968fdd 225 free(link->ssid);
6706ce2f 226 free(link->previous_ssid);
c643bda5 227 free(link->driver);
6cad256d 228
a34e58d4
YW		 229 unlink_and_free(link->lease_file);
230 unlink_and_free(link->lldp_file);
231 unlink_and_free(link->state_file);
c166a070 232
8de56fb3 233 sd_device_unref(link->dev);
9aa2585e 234 netdev_unref(link->netdev);
b5db00e5 235
0d4ad91d 236 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 237 hashmap_free(link->bound_by_links);
238
5f707e12 239 set_free_with_destructor(link->slaves, link_unref);
033295c1 240
c9c908a6
YW		 241 network_unref(link->network);
242
6706ce2f
YW		 243 sd_event_source_disable_unref(link->carrier_lost_timer);
244
8301aa0b 245 return mfree(link);
14b746f7
TG		 246}
247
8301aa0b 248DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 249
6eab614d 250int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 251 Link *link;
11a7f229
TG		 252
253 assert(m);
c2aed128
YW		 254
255 if (ifindex <= 0)
256 return -EINVAL;
11a7f229 257
6eab614d 258 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 259 if (!link)
260 return -ENODEV;
261
0b54c870
YW		 262 if (ret)
263 *ret = link;
264 return 0;
265}
266
267int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
268 Link *link;
269
270 assert(m);
271 assert(ifname);
11a7f229 272
0b54c870
YW		 273 link = hashmap_get(m->links_by_name, ifname);
274 if (!link)
275 return -ENODEV;
276
277 if (ret)
278 *ret = link;
11a7f229
TG		 279 return 0;
280}
281
fe321d45
YW		 282int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
283 Link *link;
284
285 assert(m);
286 assert(hw_addr);
287
288 link = hashmap_get(m->links_by_hw_addr, hw_addr);
289 if (!link)
290 return -ENODEV;
291
292 if (ret)
293 *ret = link;
294 return 0;
295}
296
81357285
YW		 297int link_get_master(Link *link, Link **ret) {
298 assert(link);
299 assert(link->manager);
300 assert(ret);
301
302 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
303 return -ENODEV;
304
6eab614d 305 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 306}
307
af9ba57a 308void link_set_state(Link *link, LinkState state) {
e331e246
TG		 309 assert(link);
310
311 if (link->state == state)
312 return;
313
0beb9542
YW		 314 log_link_debug(link, "State changed: %s -> %s",
315 link_state_to_string(link->state),
316 link_state_to_string(state));
317
e331e246
TG		 318 link->state = state;
319
320 link_send_changed(link, "AdministrativeState", NULL);
9092113d 321 link_dirty(link);
e331e246
TG		 322}
323
2a99eed0 324int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 325 int r = 0, k;
326
327 assert(link);
328 assert(link->manager);
329 assert(link->manager->event);
330
80060352
ZJS		 331 bool keep_dhcp = may_keep_dhcp &&
332 link->network &&
76a86ffd 333 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 334 (link->manager->restarting ||
335 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
336
84add3cd 337 if (!keep_dhcp) {
111bb8f9 338 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 339 if (k < 0)
36c7d709 340 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 341 }
342
2a99eed0
YW		 343 k = sd_dhcp_server_stop(link->dhcp_server);
344 if (k < 0)
345 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
346
35778343 347 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 348 if (k < 0)
c01b9b87
YW		 349 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
350
351 k = sd_lldp_tx_stop(link->lldp_tx);
352 if (k < 0)
353 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 354
84add3cd
YW		 355 k = sd_ipv4ll_stop(link->ipv4ll);
356 if (k < 0)
357 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 358
76a86ffd 359 k = ipv4acd_stop(link);
2488e4d9
YW		 360 if (k < 0)
361 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 362
84add3cd
YW		 363 k = sd_dhcp6_client_stop(link->dhcp6_client);
364 if (k < 0)
365 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 366
a27588d4 367 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 368 if (k < 0)
369 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 370
77302468 371 k = ndisc_stop(link);
84add3cd
YW		 372 if (k < 0)
373 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 374
259c65f3
YW		 375 ndisc_flush(link);
376
84add3cd
YW		 377 k = sd_radv_stop(link->radv);
378 if (k < 0)
379 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 380
111bb8f9
TG		 381 return r;
382}
383
b22d8a00 384void link_enter_failed(Link *link) {
ef1ba606 385 assert(link);
f882c247 386
370e9930 387 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 388 return;
389
6a7a4e4d 390 log_link_warning(link, "Failed");
449f7554 391
e331e246 392 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 393
2a99eed0 394 (void) link_stop_engines(link, false);
f882c247
TG		 395}
396
6accfd31
DA		 397void link_check_ready(Link *link) {
398 Address *a;
6accfd31
DA		 399
400 assert(link);
401
5f58af25
YW		 402 if (link->state == LINK_STATE_CONFIGURED)
403 return;
404
d19b9939
YW		 405 if (link->state != LINK_STATE_CONFIGURING)
406 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 407
408 if (!link->network)
a7f07cbe 409 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 410
7558f9e7
YW		 411 if (!link->tc_configured)
412 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 413
a7f07cbe
YW		 414 if (link->set_link_messages > 0)
415 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
416
417 if (!link->activated)
418 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
419
7558f9e7
YW		 420 if (link->iftype == ARPHRD_CAN) {
421 /* let's shortcut things for CAN which doesn't need most of checks below. */
422 link_set_state(link, LINK_STATE_CONFIGURED);
423 return;
424 }
425
879377ca
YW		 426 if (!link->stacked_netdevs_created)
427 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
428
76c5a0f2 429 if (!link->static_addresses_configured)
d19b9939 430 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 431
354bc760
YW		 432 if (!link->static_address_labels_configured)
433 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
434
e5b35bf6
YW		 435 if (!link->static_bridge_fdb_configured)
436 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
437
ff9e0783
YW		 438 if (!link->static_bridge_mdb_configured)
439 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
440
fdeba3f5
YW		 441 if (!link->static_ipv6_proxy_ndp_configured)
442 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
443
40ca350e
YW		 444 if (!link->static_neighbors_configured)
445 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
446
d19b9939
YW		 447 if (!link->static_nexthops_configured)
448 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 449
76c5a0f2
YW		 450 if (!link->static_routes_configured)
451 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
452
0e5ef6be 453 if (!link->static_routing_policy_rules_configured)
d19b9939 454 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 455
d19b9939
YW		 456 if (!link->sr_iov_configured)
457 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 458
4bcb8625
YW		 459 /* IPv6LL is assigned after the link gains its carrier. */
460 if (!link->network->configure_without_carrier &&
461 link_ipv6ll_enabled(link) &&
462 !in6_addr_is_set(&link->ipv6ll_address))
463 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
464
9e7d91ed
YW		 465 /* All static addresses must be ready. */
466 bool has_static_address = false;
467 SET_FOREACH(a, link->addresses) {
468 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
469 continue;
470 if (!address_is_ready(a))
471 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
472 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
473 has_static_address = true;
474 }
475
476 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
477 if (has_static_address)
478 goto ready;
479
5f950e56
YW		 480 /* If no dynamic addressing protocol enabled, assume the interface is ready.
481 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
482 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
483 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
484 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
485 goto ready;
486
487 bool ipv4ll_ready =
488 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
489 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
490 bool dhcp4_ready =
491 link_dhcp4_enabled(link) && link->dhcp4_configured &&
492 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
493 bool dhcp6_ready =
494 link_dhcp6_enabled(link) && link->dhcp6_configured &&
495 (!link->network->dhcp6_use_address ||
496 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
497 bool dhcp_pd_ready =
498 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
499 (!link->network->dhcp_pd_assign ||
500 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
501 bool ndisc_ready =
502 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
503 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
504 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
505
195b83ed
YW		 506 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
507 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
508 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 509 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
195b83ed
YW		 510 if (!dhcp4_ready)
511 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
512 if (!dhcp_pd_ready)
513 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
514 }
515
516 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 517 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
195b83ed
YW		 518 if (!dhcp6_ready)
519 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
520 if (!dhcp_pd_ready)
521 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
522 }
523 }
524
5f950e56
YW		 525 /* At least one dynamic addressing protocol is finished. */
526 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
527 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
528
529 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
530 __func__,
531 yes_no(ipv4ll_ready),
532 yes_no(dhcp4_ready),
533 yes_no(dhcp6_ready),
534 yes_no(dhcp_pd_ready),
535 yes_no(ndisc_ready));
536
537ready:
29836c16 538 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 539}
540
97108953 541static int link_request_static_configs(Link *link) {
f882c247
TG		 542 int r;
543
544 assert(link);
545 assert(link->network);
f5be5601 546 assert(link->state != _LINK_STATE_INVALID);
f882c247 547
354bc760 548 r = link_request_static_addresses(link);
0e5ef6be
YW		 549 if (r < 0)
550 return r;
551
354bc760 552 r = link_request_static_address_labels(link);
f3ef324d
YW		 553 if (r < 0)
554 return r;
e4a71bf3 555
e5b35bf6
YW		 556 r = link_request_static_bridge_fdb(link);
557 if (r < 0)
558 return r;
559
9a038aac
YW		 560 r = link_request_static_bridge_mdb(link);
561 if (r < 0)
562 return r;
563
fdeba3f5
YW		 564 r = link_request_static_ipv6_proxy_ndp_addresses(link);
565 if (r < 0)
566 return r;
567
40ca350e 568 r = link_request_static_neighbors(link);
682c65b0
YW		 569 if (r < 0)
570 return r;
bd6379ec 571
76c5a0f2 572 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 573 if (r < 0)
574 return r;
f882c247 575
76c5a0f2
YW		 576 r = link_request_static_routes(link, false);
577 if (r < 0)
578 return r;
579
580 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 581 if (r < 0)
582 return r;
d4cdbea5 583
f882c247
TG		 584 return 0;
585}
586
1187fc33
YW		 587static int link_request_stacked_netdevs(Link *link) {
588 NetDev *netdev;
e16e4b3b
DS		 589 int r;
590
591 assert(link);
592
1187fc33 593 link->stacked_netdevs_created = false;
e16e4b3b 594
1187fc33 595 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 596 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 597 if (r < 0)
598 return r;
599 }
e16e4b3b 600
bb916f35 601 if (link->create_stacked_netdev_messages == 0) {
1187fc33 602 link->stacked_netdevs_created = true;
bb916f35
YW		 603 link_check_ready(link);
604 }
e16e4b3b
DS		 605
606 return 0;
607}
608
8566df79 609static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 610 int r;
611
612 assert(link);
613
0f96a823
YW		 614 r = radv_start(link);
615 if (r < 0)
616 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 617
294f129b
YW		 618 r = ndisc_start(link);
619 if (r < 0)
620 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 621
294f129b
YW		 622 r = dhcp6_start(link);
623 if (r < 0)
624 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 625
e7ab854c
TG		 626 return 0;
627}
628
8566df79 629static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 630 int r;
631
632 assert(link);
ff254138
TG		 633 assert(link->manager);
634 assert(link->manager->event);
635
0107b769 636 if (link->dhcp_client) {
294f129b 637 r = dhcp4_start(link);
0107b769 638 if (r < 0)
294f129b 639 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 640
ccffa166 641 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 642
ccffa166 643 } else if (link->ipv4ll) {
59c27231
AK		 644 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
645 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
646 if (r < 0)
647 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
648 }
649
5c1d3fc9 650 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 651 if (r < 0)
652 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 653
654 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 655 }
656
ab486ef4
YW		 657 if (link->dhcp_server) {
658 r = sd_dhcp_server_start(link->dhcp_server);
659 if (r < 0)
660 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
661 }
662
76a86ffd
YW		 663 r = ipv4acd_start(link);
664 if (r < 0)
665 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
666
6fc25497
SS		 667 return 0;
668}
669
8566df79 670static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 671 int r;
672
673 assert(link);
0f96a823 674 assert(link->network);
6fc25497 675
8566df79 676 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 677 if (r < 0)
678 return r;
679
94876904 680 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 681 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 682 if (r < 0)
683 return r;
684 }
685
a27588d4 686 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 687 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
688 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
689 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
690 * below will be called in radv_start(). */
a27588d4 691 r = dhcp_request_prefix_delegation(link);
0f96a823 692 if (r < 0)
a27588d4 693 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 694 }
695
c01b9b87
YW		 696 if (link->lldp_tx) {
697 r = sd_lldp_tx_start(link->lldp_tx);
698 if (r < 0)
699 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
700 }
8e1ad1ea 701
35778343
YW		 702 if (link->lldp_rx) {
703 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 704 if (r < 0)
705 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
706 }
707
ff254138
TG		 708 return 0;
709}
710
7657ec3e 711int link_ipv6ll_gained(Link *link) {
0c9ee5d5 712 int r;
deb2e523 713
0c9ee5d5 714 assert(link);
deb2e523 715
0c9ee5d5 716 log_link_info(link, "Gained IPv6LL");
deb2e523 717
7657ec3e
YW		 718 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
719 return 0;
0c9ee5d5 720
7657ec3e
YW		 721 r = link_acquire_dynamic_ipv6_conf(link);
722 if (r < 0)
723 return r;
0c9ee5d5 724
7657ec3e 725 link_check_ready(link);
0c9ee5d5 726 return 0;
deb2e523
TG		 727}
728
112a0972 729int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 730 bool required_up = false;
731 bool link_is_up = false;
852a3916 732 Link *l;
0d4ad91d
AR		 733
734 assert(link);
735
ad82f0c3
YW		 736 /* If at least one interface in bound_to_links has carrier, then make this interface up.
737 * If all interfaces in bound_to_links do not, then make this interface down. */
738
0d4ad91d
AR		 739 if (hashmap_isempty(link->bound_to_links))
740 return 0;
741
742 if (link->flags & IFF_UP)
743 link_is_up = true;
744
852a3916 745 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 746 if (link_has_carrier(l)) {
747 required_up = true;
748 break;
749 }
750
852a3916 751 if (!required_up && link_is_up)
68f52063 752 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 753 if (required_up && !link_is_up)
68f52063 754 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 755
756 return 0;
757}
758
759static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 760 Link *l;
761 int r;
762
763 assert(link);
764
ad82f0c3
YW		 765 /* Update up or down state of interfaces which depend on this interface's carrier state. */
766
0d4ad91d
AR		 767 if (hashmap_isempty(link->bound_by_links))
768 return 0;
769
852a3916 770 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 771 r = link_handle_bound_to_list(l);
772 if (r < 0)
773 return r;
774 }
775
776 return 0;
777}
778
779static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
780 int r;
781
782 assert(link);
783 assert(carrier);
784
785 if (link == carrier)
786 return 0;
787
788 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
789 return 0;
790
190b3b5c 791 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 792 if (r < 0)
793 return r;
794
9092113d
YW		 795 link_dirty(link);
796
0d4ad91d
AR		 797 return 0;
798}
799
800static int link_new_bound_by_list(Link *link) {
801 Manager *m;
802 Link *carrier;
0d4ad91d 803 int r;
0d4ad91d
AR		 804
805 assert(link);
806 assert(link->manager);
807
808 m = link->manager;
809
6eab614d 810 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 811 if (!carrier->network)
812 continue;
813
814 if (strv_isempty(carrier->network->bind_carrier))
815 continue;
816
191a3f16 817 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 818 r = link_put_carrier(link, carrier, &link->bound_by_links);
819 if (r < 0)
820 return r;
0d4ad91d
AR		 821 }
822 }
823
90e74a66 824 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 825 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
826 if (r < 0)
827 return r;
0d4ad91d
AR		 828 }
829
830 return 0;
831}
832
833static int link_new_bound_to_list(Link *link) {
834 Manager *m;
835 Link *carrier;
0d4ad91d 836 int r;
0d4ad91d
AR		 837
838 assert(link);
839 assert(link->manager);
840
841 if (!link->network)
842 return 0;
843
844 if (strv_isempty(link->network->bind_carrier))
845 return 0;
846
847 m = link->manager;
848
6eab614d 849 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 850 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 851 r = link_put_carrier(link, carrier, &link->bound_to_links);
852 if (r < 0)
853 return r;
0d4ad91d
AR		 854 }
855 }
856
852a3916 857 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 858 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
859 if (r < 0)
860 return r;
0d4ad91d
AR		 861 }
862
863 return 0;
864}
865
0d4ad91d 866static void link_free_bound_to_list(Link *link) {
9092113d 867 bool updated = false;
0d4ad91d 868 Link *bound_to;
0d4ad91d 869
9092113d
YW		 870 assert(link);
871
872 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
873 updated = true;
0d4ad91d
AR		 874
875 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 876 link_dirty(bound_to);
0d4ad91d
AR		 877 }
878
9092113d
YW		 879 if (updated)
880 link_dirty(link);
0d4ad91d
AR		 881}
882
883static void link_free_bound_by_list(Link *link) {
9092113d 884 bool updated = false;
0d4ad91d 885 Link *bound_by;
0d4ad91d 886
9092113d
YW		 887 assert(link);
888
889 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
890 updated = true;
0d4ad91d
AR		 891
892 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 893 link_dirty(bound_by);
0d4ad91d
AR		 894 link_handle_bound_to_list(bound_by);
895 }
896 }
897
9092113d
YW		 898 if (updated)
899 link_dirty(link);
0d4ad91d
AR		 900}
901
81357285 902static int link_append_to_master(Link *link) {
5f707e12
YW		 903 Link *master;
904 int r;
905
906 assert(link);
5f707e12 907
81357285
YW		 908 /* - The link may have no master.
909 * - RTM_NEWLINK message about master interface may not be received yet. */
910 if (link_get_master(link, &master) < 0)
911 return 0;
5f707e12 912
de7fef4b 913 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 914 if (r <= 0)
5f707e12
YW		 915 return r;
916
917 link_ref(link);
918 return 0;
919}
920
81357285 921static void link_drop_from_master(Link *link) {
5f707e12
YW		 922 Link *master;
923
924 assert(link);
925
81357285 926 if (!link->manager)
5f707e12
YW		 927 return;
928
81357285 929 if (link_get_master(link, &master) < 0)
5f707e12
YW		 930 return;
931
932 link_unref(set_remove(master->slaves, link));
933}
934
56001f02
YW		 935static void link_drop_requests(Link *link) {
936 Request *req;
937
938 assert(link);
939 assert(link->manager);
940
941 ORDERED_SET_FOREACH(req, link->manager->request_queue)
942 if (req->link == link)
e26d3d40 943 request_detach(link->manager, req);
56001f02
YW		 944}
945
cc2d7efc 946static Link *link_drop(Link *link) {
63130eb3 947 if (!link)
cc2d7efc 948 return NULL;
0d4ad91d 949
63130eb3
YW		 950 assert(link->manager);
951
0d4ad91d
AR		 952 link_set_state(link, LINK_STATE_LINGER);
953
63130eb3
YW		 954 /* Drop all references from other links and manager. Note that async netlink calls may have
955 * references to the link, and they will be dropped when we receive replies. */
956
56001f02
YW		 957 link_drop_requests(link);
958
bb193d2d
YW		 959 link_free_bound_to_list(link);
960 link_free_bound_by_list(link);
0d4ad91d 961
b0ff6dea
YW		 962 link_clear_sr_iov_ifindices(link);
963
81357285 964 link_drop_from_master(link);
5f707e12 965
4c78dc17
YW		 966 if (link->state_file)
967 (void) unlink(link->state_file);
968
63130eb3
YW		 969 link_clean(link);
970
0b54c870
YW		 971 STRV_FOREACH(n, link->alternative_names)
972 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 973 hashmap_remove(link->manager->links_by_name, link->ifname);
974
fe321d45 975 /* bonding master and its slaves have the same hardware address. */
e74f1d07 976 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 977
63130eb3 978 /* The following must be called at last. */
6eab614d 979 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 980 return link_unref(link);
0d4ad91d
AR		 981}
982
5e5b137a 983static int link_drop_foreign_config(Link *link) {
1339b950 984 int r;
0b81225e
YW		 985
986 assert(link);
987 assert(link->manager);
5e5b137a 988
5e3bb5da
YW		 989 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
990 * to remove loopback address or addresses used for root NFS. */
991
992 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
993 return 0;
994 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
995 return 0;
996 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
997 return 0;
998
e36d601c 999 r = link_drop_foreign_routes(link);
5e5b137a 1000
1339b950
ZJS		 1001 RET_GATHER(r, link_drop_foreign_nexthops(link));
1002 RET_GATHER(r, link_drop_foreign_addresses(link));
1003 RET_GATHER(r, link_drop_foreign_neighbors(link));
1004 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW		 1005
1006 return r;
5e5b137a
TG		 1007}
1008
a0e99a37 1009static int link_drop_managed_config(Link *link) {
1339b950 1010 int r;
0b81225e
YW		 1011
1012 assert(link);
1013 assert(link->manager);
3104883d 1014
a0e99a37 1015 r = link_drop_managed_routes(link);
3104883d 1016
1339b950
ZJS		 1017 RET_GATHER(r, link_drop_managed_nexthops(link));
1018 RET_GATHER(r, link_drop_managed_addresses(link));
1019 RET_GATHER(r, link_drop_managed_neighbors(link));
1020 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 1021
0b81225e 1022 return r;
3104883d
SS		 1023}
1024
b4564f4e
YW		 1025static void link_foreignize_config(Link *link) {
1026 assert(link);
1027 assert(link->manager);
1028
1029 link_foreignize_routes(link);
1030 link_foreignize_nexthops(link);
1031 link_foreignize_addresses(link);
1032 link_foreignize_neighbors(link);
1033 link_foreignize_routing_policy_rules(link);
1034}
1035
c3b94251 1036static int link_configure(Link *link) {
4ecdcb07
YW		 1037 int r;
1038
ef1ba606 1039 assert(link);
b22d8a00 1040 assert(link->network);
bd08ce56 1041 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1042
1187fc33
YW		 1043 link_set_state(link, LINK_STATE_CONFIGURING);
1044
3cf58ef3
YW		 1045 r = link_new_bound_to_list(link);
1046 if (r < 0)
1047 return r;
1048
1dec9d81 1049 r = link_request_traffic_control(link);
4ecdcb07
YW		 1050 if (r < 0)
1051 return r;
1052
941f8e13
YW		 1053 r = link_configure_mtu(link);
1054 if (r < 0)
1055 return r;
1056
7558f9e7
YW		 1057 if (link->iftype == ARPHRD_CAN) {
1058 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1059 r = link_request_to_set_can(link);
1060 if (r < 0)
1061 return r;
1062
1063 return link_request_to_activate(link);
1064 }
1065
cb8453cc 1066 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1067 if (r < 0)
1068 return r;
1069
5e0534f1 1070 r = link_set_sysctl(link);
b69c3180
SS		 1071 if (r < 0)
1072 return r;
8749cbcd 1073
d05c332c 1074 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1075 if (r < 0)
1076 return r;
1077
72e65e6f
YW		 1078 r = link_request_to_set_ipoib(link);
1079 if (r < 0)
1080 return r;
1081
1187fc33 1082 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1083 if (r < 0)
1084 return r;
1085
1187fc33 1086 r = link_request_to_set_group(link);
99d2baa2
SS		 1087 if (r < 0)
1088 return r;
1089
1187fc33
YW		 1090 r = link_request_to_set_addrgen_mode(link);
1091 if (r < 0)
1092 return r;
1093
1094 r = link_request_to_set_master(link);
1095 if (r < 0)
1096 return r;
1097
1098 r = link_request_stacked_netdevs(link);
1099 if (r < 0)
1100 return r;
1101
1102 r = link_request_to_set_bond(link);
1103 if (r < 0)
1104 return r;
1105
1106 r = link_request_to_set_bridge(link);
1107 if (r < 0)
1108 return r;
1109
1110 r = link_request_to_set_bridge_vlan(link);
1111 if (r < 0)
1112 return r;
1113
1114 r = link_request_to_activate(link);
89fe6535
SS		 1115 if (r < 0)
1116 return r;
1117
2ffd6d73
YW		 1118 r = ipv4ll_configure(link);
1119 if (r < 0)
1120 return r;
64b21ece 1121
ccffa166 1122 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1123 if (r < 0)
1124 return r;
eb34d4af 1125
ccffa166 1126 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1127 if (r < 0)
1128 return r;
f5a8c43f 1129
ba4c7184 1130 r = link_request_ndisc(link);
2ffd6d73
YW		 1131 if (r < 0)
1132 return r;
4138fb2c 1133
1d28a3cf
YW		 1134 r = link_request_dhcp_server(link);
1135 if (r < 0)
1136 return r;
1137
a254fab2 1138 r = link_request_radv(link);
086b8853
YW		 1139 if (r < 0)
1140 return r;
7465dd22 1141
2ffd6d73
YW		 1142 r = link_lldp_rx_configure(link);
1143 if (r < 0)
1144 return r;
ce43e484 1145
c01b9b87
YW		 1146 r = link_lldp_tx_configure(link);
1147 if (r < 0)
1148 return r;
1149
5e3bb5da
YW		 1150 r = link_drop_foreign_config(link);
1151 if (r < 0)
1152 return r;
4c649652 1153
1187fc33
YW		 1154 r = link_request_static_configs(link);
1155 if (r < 0)
1156 return r;
1157
1158 if (!link_has_carrier(link))
1159 return 0;
1160
1161 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1162}
1163
170e88c8
YW		 1164static int link_get_network(Link *link, Network **ret) {
1165 Network *network;
1a3caa49 1166 int r;
170e88c8
YW		 1167
1168 assert(link);
1169 assert(link->manager);
1170 assert(ret);
1171
1172 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1173 bool warn = false;
1174
1a3caa49 1175 r = net_match_config(
170e88c8 1176 &network->match,
8de56fb3 1177 link->dev,
52135071
YW		 1178 &link->hw_addr,
1179 &link->permanent_hw_addr,
170e88c8
YW		 1180 link->driver,
1181 link->iftype,
65022cd7 1182 link->kind,
170e88c8
YW		 1183 link->ifname,
1184 link->alternative_names,
1185 link->wlan_iftype,
1186 link->ssid,
1a3caa49
YW		 1187 &link->bssid);
1188 if (r < 0)
1189 return r;
1190 if (r == 0)
170e88c8
YW		 1191 continue;
1192
8de56fb3 1193 if (network->match.ifname && link->dev) {
170e88c8
YW		 1194 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1195 const char *attr;
1196
8de56fb3 1197 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1198 (void) safe_atou8(attr, &name_assign_type);
1199
1200 warn = name_assign_type == NET_NAME_ENUM;
1201 }
1202
1203 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1204 "found matching network '%s'%s.",
1205 network->filename,
1206 warn ? ", based on potentially unpredictable interface name" : "");
1207
1208 if (network->unmanaged)
1209 return -ENOENT;
1210
1211 *ret = network;
1212 return 0;
1213 }
1214
1215 return -ENOENT;
1216}
1217
8a4ad01a 1218int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1219 Network *network = NULL;
9aa2585e 1220 NetDev *netdev = NULL;
ad932b15
YW		 1221 int r;
1222
5a1860f7 1223 assert(link);
572b21d9 1224
4faca0a3 1225 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1226 return 0;
1227
9aa2585e
YW		 1228 r = netdev_get(link->manager, link->ifname, &netdev);
1229 if (r < 0 && r != -ENOENT)
1230 return r;
1231
170e88c8 1232 r = link_get_network(link, &network);
cb71e9c6 1233 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1234 return r;
1235
fb961119
YW		 1236 if (link->state != LINK_STATE_UNMANAGED && !network)
1237 /* If link is in initialized state, then link->network is also NULL. */
1238 force = true;
1239
99b8517c 1240 if (link->network == network && !force)
ad932b15
YW		 1241 return 0;
1242
fb961119 1243 if (network) {
b993e7e7
YW		 1244 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1245
fb961119 1246 if (link->state == LINK_STATE_INITIALIZED)
b993e7e7
YW		 1247 log_link_info(link, "Configuring with %s%s%s%s.",
1248 network->filename,
1249 isempty(joined) ? "" : " (dropins: ",
1250 joined,
1251 isempty(joined) ? "" : ")");
fb961119 1252 else
b993e7e7
YW		 1253 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1254 network->filename,
1255 isempty(joined) ? "" : " (dropins: ",
1256 joined,
1257 isempty(joined) ? "" : ")");
fb961119
YW		 1258 } else
1259 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1260 "Unmanaging interface.");
ad932b15
YW		 1261
1262 /* Dropping old .network file */
2a99eed0 1263 r = link_stop_engines(link, false);
572b21d9 1264 if (r < 0)
ad932b15 1265 return r;
ad932b15 1266
19d9a5ad
YW		 1267 link_drop_requests(link);
1268
81db4f3d 1269 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1270 /* When a new/updated .network file is assigned, first make all configs (addresses,
1271 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1272 * link_drop_foreign_config() in link_configure().
1273 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1274 * here we need to drop the configs such as addresses, routes, and so on configured by
1275 * the previously assigned .network file. */
b4564f4e
YW		 1276 link_foreignize_config(link);
1277 else {
a0e99a37
YW		 1278 /* Remove all managed configs. Note, foreign configs are removed in later by
1279 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1280 r = link_drop_managed_config(link);
b4564f4e
YW		 1281 if (r < 0)
1282 return r;
1283 }
ad932b15 1284
3cf58ef3
YW		 1285 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1286 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1287 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1288 * map here, as it depends on .network files assigned to other links. */
1289 link_free_bound_to_list(link);
1290
ad932b15
YW		 1291 link_free_engines(link);
1292 link->network = network_unref(link->network);
1293
9aa2585e
YW		 1294 netdev_unref(link->netdev);
1295 link->netdev = netdev_ref(netdev);
1296
cb71e9c6
YW		 1297 if (!network) {
1298 link_set_state(link, LINK_STATE_UNMANAGED);
1299 return 0;
1300 }
1301
ad932b15 1302 /* Then, apply new .network file */
9092113d 1303 link->network = network_ref(network);
b156a95d 1304 link_update_operstate(link, true);
9092113d 1305 link_dirty(link);
ad932b15 1306
ad932b15 1307 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1308 link->activated = false;
ad932b15 1309
ad932b15
YW		 1310 r = link_configure(link);
1311 if (r < 0)
1312 return r;
1313
0e397560 1314 return 1;
ad932b15
YW		 1315}
1316
96f5f9ef 1317static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1318 int r;
1319
d09a179e
YW		 1320 assert(link);
1321
5a1860f7
YW		 1322 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1323 if (r <= 0)
1324 return r;
1325
7f80fa12 1326 r = link_reconfigure_impl(link, force);
d09a179e 1327 if (r < 0) {
572b21d9 1328 link_enter_failed(link);
d09a179e
YW		 1329 return 0;
1330 }
572b21d9 1331
d09a179e 1332 return r;
572b21d9
YW		 1333}
1334
5a1860f7 1335static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1336 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1337}
572b21d9 1338
5a1860f7 1339static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1340 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1341}
1342
a39a9ac8 1343int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1344 int r;
1345
1346 assert(link);
d09a179e 1347
8bceafa7 1348 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1349 * the function from being called multiple times simultaneously, refuse to reconfigure the
1350 * interface in these cases. */
8bceafa7 1351 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1352 return 0; /* 0 means no-op. */
2c0d7ed3 1353
a39a9ac8 1354 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1355 if (r < 0)
1356 return r;
1357
8bceafa7 1358 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1359}
1360
e6bf7774 1361static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1362 int r;
1363
1364 assert(link);
505f8da7
TG		 1365 assert(link->manager);
1366
faa2e64f
YW		 1367 if (link->manager->test_mode) {
1368 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1369 link_set_state(link, LINK_STATE_UNMANAGED);
1370 return 0;
1371 }
1372
40695457
YW		 1373 if (link->state == LINK_STATE_PENDING) {
1374 log_link_debug(link, "Link state is up-to-date");
1375 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1376
40695457
YW		 1377 r = link_new_bound_by_list(link);
1378 if (r < 0)
1379 return r;
0d4ad91d 1380
40695457
YW		 1381 r = link_handle_bound_by_list(link);
1382 if (r < 0)
1383 return r;
1384 }
0d4ad91d 1385
fb961119 1386 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1387}
1388
302a796f 1389static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1390 int r;
1391
5a1860f7
YW		 1392 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1393 if (r <= 0)
0b54c870 1394 return r;
572b21d9 1395
4ff296b0
YW		 1396 r = link_initialized_and_synced(link);
1397 if (r < 0)
1398 link_enter_failed(link);
5a1860f7
YW		 1399
1400 return 0;
e6bf7774
YW		 1401}
1402
3be9d62a 1403static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1404 int r;
1405
4f561e8e 1406 assert(link);
4f561e8e
TG		 1407 assert(device);
1408
160203e9
YW		 1409 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1410 * or sysattrs) may be outdated. */
8de56fb3 1411 device_unref_and_replace(link->dev, device);
4f561e8e 1412
3b1dbdf0
YW		 1413 if (link->dhcp_client) {
1414 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1415 if (r < 0)
1416 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1417 }
1418
1419 if (link->dhcp6_client) {
1420 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1421 if (r < 0)
1422 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1423 }
1424
b0ff6dea
YW		 1425 r = link_set_sr_iov_ifindices(link);
1426 if (r < 0)
1427 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1428
40695457
YW		 1429 if (link->state != LINK_STATE_PENDING)
1430 return link_reconfigure(link, /* force = */ false);
679b3605 1431
79008bdd 1432 log_link_debug(link, "udev initialized link");
4f561e8e 1433
3c9b8860
TG		 1434 /* udev has initialized the link, but we don't know if we have yet
1435 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1436 * when it returns we know that the pending NEWLINKs have already been
1437 * processed and that we are up-to-date */
4f561e8e 1438
5a1860f7 1439 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1440}
1441
0d411b7f 1442static int link_check_initialized(Link *link) {
51517f9e 1443 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1444 int r;
505f8da7 1445
0d411b7f 1446 assert(link);
505f8da7 1447
82f52245 1448 if (!udev_available())
0d411b7f 1449 return link_initialized_and_synced(link);
852a3916
YW		 1450
1451 /* udev should be around */
0ac655a6 1452 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1453 if (r < 0) {
1454 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1455 return 0;
1456 }
1457
1458 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1459 if (r < 0)
1460 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1461 if (r == 0) {
1462 /* not yet ready */
1463 log_link_debug(link, "link pending udev initialization...");
1464 return 0;
1465 }
1466
1467 r = device_is_renaming(device);
0d411b7f
YW		 1468 if (r < 0)
1469 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1470 if (r > 0) {
1471 log_link_debug(link, "Interface is being renamed, pending initialization.");
1472 return 0;
4f561e8e 1473 }
505f8da7 1474
0d411b7f 1475 return link_initialized(link, device);
a748b692
TG		 1476}
1477
1fd3ac1e 1478int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1479 int r, ifindex;
ba87a61d 1480 const char *s;
1fd3ac1e 1481 Link *link;
3be9d62a
YW		 1482
1483 assert(m);
1484 assert(device);
1485
3be9d62a 1486 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1487 if (r < 0)
1488 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1489
75255a8d
YW		 1490 r = link_get_by_index(m, ifindex, &link);
1491 if (r < 0) {
1492 /* This error is not critical, as the corresponding rtnl message may be received later. */
1493 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1494 return 0;
1495 }
1496
1497 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1498 * object here. It will be removed only when rtnetlink says so. */
1499 if (action == SD_DEVICE_REMOVE) {
1500 link->dev = sd_device_unref(link->dev);
1501 return 0;
1502 }
1503
3be9d62a 1504 r = device_is_renaming(device);
1fd3ac1e
YW		 1505 if (r < 0)
1506 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1507 if (r > 0) {
1fd3ac1e 1508 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1509 /* TODO:
1510 * What happens when a device is initialized, then soon renamed after that? When we detect
1511 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1512 return 0;
1513 }
1514
ba87a61d
YW		 1515 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1516 if (r < 0 && r != -ENOENT)
1517 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1518 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1519 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1520 link_set_state(link, LINK_STATE_UNMANAGED);
1521 return 0;
1522 }
1523
4b9a8c2b
YW		 1524 r = link_initialized(link, device);
1525 if (r < 0)
1526 link_enter_failed(link);
3be9d62a
YW		 1527
1528 return 0;
1529}
1530
9c0a72f9 1531static int link_carrier_gained(Link *link) {
6706ce2f 1532 bool force_reconfigure;
9c0a72f9
TG		 1533 int r;
1534
1535 assert(link);
1536
6706ce2f
YW		 1537 r = event_source_disable(link->carrier_lost_timer);
1538 if (r < 0)
1539 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1540
d9910948
YW		 1541 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1542 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1543 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1544 * restarted, and the correct network information will be gained.
1545 *
1546 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1547 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1548 * already assigned to the interface (in that case, the .network file does not have the SSID=
1549 * setting in the [Match] section), and the interface is already being configured. Of course,
1550 * there may exist another .network file with higher priority and a matching SSID= setting. But
1551 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1552 *
6706ce2f 1553 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1554 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1555 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1556 link->previous_ssid = mfree(link->previous_ssid);
1557
986b2514
AŠ		 1558 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1559 * profile wants to match on it with SSID= in its [Match] section.
1560 */
1561 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1562 r = link_get_wlan_interface(link);
1563 if (r < 0)
1564 return r;
1565 }
1566
081466bd
YW		 1567 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1568 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1569 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1570 r = link_reconfigure_impl(link, force_reconfigure);
1571 if (r != 0)
1572 return r;
b7ac1284 1573
aa9117c0
YW		 1574 r = link_handle_bound_by_list(link);
1575 if (r < 0)
1576 return r;
1577
600b7898
YW		 1578 if (link->iftype == ARPHRD_CAN)
1579 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1580 return 0;
600b7898 1581
b9ea3d2e 1582 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1583 r = link_acquire_dynamic_conf(link);
f0269653 1584 if (r < 0)
9c0a72f9 1585 return r;
6fc25497 1586
97108953 1587 r = link_request_static_configs(link);
6fc25497
SS		 1588 if (r < 0)
1589 return r;
9c0a72f9
TG		 1590 }
1591
aa9117c0 1592 return 0;
9c0a72f9
TG		 1593}
1594
6706ce2f
YW		 1595static int link_carrier_lost_impl(Link *link) {
1596 int r, ret = 0;
1597
1598 assert(link);
1599
1600 link->previous_ssid = mfree(link->previous_ssid);
1601
1602 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1603 return 0;
1604
1605 if (!link->network)
1606 return 0;
1607
1608 r = link_stop_engines(link, false);
1609 if (r < 0)
1610 ret = r;
1611
a0e99a37 1612 r = link_drop_managed_config(link);
6706ce2f
YW		 1613 if (r < 0 && ret >= 0)
1614 ret = r;
1615
1616 return ret;
1617}
1618
1619static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1620 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1621 int r;
1622
6706ce2f
YW		 1623 r = link_carrier_lost_impl(link);
1624 if (r < 0) {
1625 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1626 link_enter_failed(link);
1627 }
1628
1629 return 0;
1630}
1631
9c0a72f9 1632static int link_carrier_lost(Link *link) {
b7326069
YW		 1633 uint16_t dhcp_mtu;
1634 usec_t usec;
9c0a72f9
TG		 1635 int r;
1636
1637 assert(link);
1638
aa9117c0
YW		 1639 r = link_handle_bound_by_list(link);
1640 if (r < 0)
1641 return r;
93b4dab5 1642
600b7898
YW		 1643 if (link->iftype == ARPHRD_CAN)
1644 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1645 return 0;
1646
f1c22cf4
YW		 1647 if (!link->network)
1648 return 0;
1649
b7326069
YW		 1650 if (link->network->ignore_carrier_loss_set)
1651 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1652 usec = link->network->ignore_carrier_loss_usec;
1653
1654 else if (link->network->bond && link->wlan_iftype > 0)
1655 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1656 * carrier to be lost. See #19832. */
1657 usec = 3 * USEC_PER_SEC;
1658
1659 else if (link->network->dhcp_use_mtu &&
1660 link->dhcp_lease &&
1661 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1662 dhcp_mtu != link->original_mtu)
1663 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1664 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1665 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1666 usec = 5 * USEC_PER_SEC;
1667
1668 else
1669 /* Otherwise, use the currently set value. */
1670 usec = link->network->ignore_carrier_loss_usec;
1671
1672 if (usec == USEC_INFINITY)
aa9117c0 1673 return 0;
600b7898 1674
b7326069 1675 if (usec == 0)
6706ce2f
YW		 1676 return link_carrier_lost_impl(link);
1677
1678 return event_reset_time_relative(link->manager->event,
1679 &link->carrier_lost_timer,
ba4e0427 1680 CLOCK_BOOTTIME,
b7326069 1681 usec,
6706ce2f
YW		 1682 0,
1683 link_carrier_lost_handler,
1684 link,
1685 0,
1686 "link-carrier-loss",
1687 true);
0c9ee5d5
YW		 1688}
1689
0c9ee5d5
YW		 1690static int link_admin_state_up(Link *link) {
1691 int r;
1692
1693 assert(link);
1694
1695 /* This is called every time an interface admin state changes to up;
1696 * specifically, when IFF_UP flag changes from unset to set. */
1697
1698 if (!link->network)
1699 return 0;
1700
899b0e5e 1701 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1702 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1703 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1704 }
1705
1706 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1707 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1708 r = link_set_ipv6_mtu(link);
1709 if (r < 0)
1710 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1711
1712 return 0;
1713}
1714
1715static int link_admin_state_down(Link *link) {
1716 assert(link);
1717
1718 if (!link->network)
1719 return 0;
1720
899b0e5e 1721 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1722 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1723 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1724 }
1725
1726 return 0;
1727}
1728
0c9ee5d5
YW		 1729static bool link_is_enslaved(Link *link) {
1730 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1731 return true;
1732
1f024462 1733 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1734 return true;
1735
0c9ee5d5
YW		 1736 return false;
1737}
1738
0c9ee5d5
YW		 1739void link_update_operstate(Link *link, bool also_update_master) {
1740 LinkOperationalState operstate;
1741 LinkCarrierState carrier_state;
1742 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1743 LinkOnlineState online_state;
1744 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1745 bool changed = false;
0c9ee5d5
YW		 1746
1747 assert(link);
1748
1749 if (link->kernel_operstate == IF_OPER_DORMANT)
1750 carrier_state = LINK_CARRIER_STATE_DORMANT;
1751 else if (link_has_carrier(link)) {
1752 if (link_is_enslaved(link))
1753 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1754 else
1755 carrier_state = LINK_CARRIER_STATE_CARRIER;
1756 } else if (link->flags & IFF_UP)
1757 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1758 else
1759 carrier_state = LINK_CARRIER_STATE_OFF;
1760
1761 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1762 Link *slave;
1763
1764 SET_FOREACH(slave, link->slaves) {
1765 link_update_operstate(slave, false);
1766
1767 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1768 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1769 }
1770 }
1771
60415c13 1772 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 1773
1774 /* Mapping of address and carrier state vs operational state
1775 * carrier state
1776 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1777 * ------------------------------------------------------------------------------
1778 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1779 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1780 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1781 */
1782
cf4dbd84
HH		 1783 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1784 operstate = LINK_OPERSTATE_ROUTABLE;
1785 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1786 operstate = LINK_OPERSTATE_DEGRADED;
1787 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1788 operstate = (LinkOperationalState) carrier_state;
1789 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1790 operstate = LINK_OPERSTATE_ROUTABLE;
1791 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1792 operstate = LINK_OPERSTATE_DEGRADED;
1793 else
1794 operstate = LINK_OPERSTATE_ENSLAVED;
1795
1796 /* Only determine online state for managed links with RequiredForOnline=yes */
1797 if (!link->network || !link->network->required_for_online)
1798 online_state = _LINK_ONLINE_STATE_INVALID;
1799 else if (operstate < link->network->required_operstate_for_online.min ||
1800 operstate > link->network->required_operstate_for_online.max)
1801 online_state = LINK_ONLINE_STATE_OFFLINE;
1802 else {
1803 AddressFamily required_family = link->network->required_family_for_online;
1804 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1805 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1806
1807 /* The operational state is within the range required for online.
1808 * If a particular address family is also required, we might revert
1809 * to offline in the blocks below. */
1810 online_state = LINK_ONLINE_STATE_ONLINE;
1811
1812 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1813 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1814 online_state = LINK_ONLINE_STATE_OFFLINE;
1815 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1816 online_state = LINK_ONLINE_STATE_OFFLINE;
1817 }
1818
1819 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1820 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1821 online_state = LINK_ONLINE_STATE_OFFLINE;
1822 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1823 online_state = LINK_ONLINE_STATE_OFFLINE;
1824 }
1825 }
1826
1827 if (link->carrier_state != carrier_state) {
1828 link->carrier_state = carrier_state;
1829 changed = true;
1830 if (strv_extend(&p, "CarrierState") < 0)
1831 log_oom();
1832 }
1833
1834 if (link->address_state != address_state) {
1835 link->address_state = address_state;
1836 changed = true;
1837 if (strv_extend(&p, "AddressState") < 0)
1838 log_oom();
1839 }
0d4ad91d 1840
0c9ee5d5
YW		 1841 if (link->ipv4_address_state != ipv4_address_state) {
1842 link->ipv4_address_state = ipv4_address_state;
1843 changed = true;
1844 if (strv_extend(&p, "IPv4AddressState") < 0)
1845 log_oom();
1846 }
9c0a72f9 1847
0c9ee5d5
YW		 1848 if (link->ipv6_address_state != ipv6_address_state) {
1849 link->ipv6_address_state = ipv6_address_state;
1850 changed = true;
1851 if (strv_extend(&p, "IPv6AddressState") < 0)
1852 log_oom();
1853 }
9c0a72f9 1854
0c9ee5d5
YW		 1855 if (link->operstate != operstate) {
1856 link->operstate = operstate;
1857 changed = true;
1858 if (strv_extend(&p, "OperationalState") < 0)
1859 log_oom();
1860 }
9c0a72f9 1861
0c9ee5d5
YW		 1862 if (link->online_state != online_state) {
1863 link->online_state = online_state;
1864 changed = true;
1865 if (strv_extend(&p, "OnlineState") < 0)
1866 log_oom();
1867 }
9c0a72f9 1868
0c9ee5d5
YW		 1869 if (p)
1870 link_send_changed_strv(link, p);
1871 if (changed)
1872 link_dirty(link);
9c0a72f9 1873
0c9ee5d5
YW		 1874 if (also_update_master) {
1875 Link *master;
9c0a72f9 1876
0c9ee5d5
YW		 1877 if (link_get_master(link, &master) >= 0)
1878 link_update_operstate(master, true);
1879 }
9c0a72f9
TG		 1880}
1881
0c9ee5d5
YW		 1882#define FLAG_STRING(string, flag, old, new) \
1883 (((old ^ new) & flag) \
1884 ? ((old & flag) ? (" -" string) : (" +" string)) \
1885 : "")
1886
0d411b7f 1887static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1888 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1889 uint8_t operstate;
1890 unsigned flags;
d236718c
DS		 1891 int r;
1892
61135582 1893 assert(link);
0d411b7f 1894 assert(message);
61135582 1895
0d411b7f 1896 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1897 if (r < 0)
0d411b7f 1898 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1899
0d411b7f
YW		 1900 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1901 if (r == -ENODATA)
1902 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1903 operstate = link->kernel_operstate;
0d411b7f
YW		 1904 else if (r < 0)
1905 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1906
0d411b7f 1907 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1908 return 0;
1909
0c9ee5d5
YW		 1910 if (link->flags != flags) {
1911 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1912
0c9ee5d5
YW		 1913 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",
1914 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1915 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1916 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1917 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1918 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1919 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1920 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1921 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1922 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1923 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1924 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1925 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1926 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1927 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1928 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1929 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1930 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1931 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1932 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1933
0c9ee5d5
YW		 1934 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1935 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1936 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1937 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1938 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1939 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1940 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1941 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1942
0c9ee5d5
YW		 1943 if (unknown_flags_added)
1944 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1945
0c9ee5d5
YW		 1946 if (unknown_flags_removed)
1947 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1948 }
61135582 1949
0d411b7f
YW		 1950 link_was_admin_up = link->flags & IFF_UP;
1951 had_carrier = link_has_carrier(link);
1952
0c9ee5d5
YW		 1953 link->flags = flags;
1954 link->kernel_operstate = operstate;
36161cba 1955
0c9ee5d5 1956 link_update_operstate(link, true);
61135582 1957
0d411b7f
YW		 1958 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1959 log_link_info(link, "Link UP");
22936833 1960
0d411b7f
YW		 1961 r = link_admin_state_up(link);
1962 if (r < 0)
1963 return r;
1964 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1965 log_link_info(link, "Link DOWN");
0d4ad91d 1966
0d411b7f 1967 r = link_admin_state_down(link);
0d4ad91d
AR		 1968 if (r < 0)
1969 return r;
7619683b
TG		 1970 }
1971
0d411b7f
YW		 1972 if (!had_carrier && link_has_carrier(link)) {
1973 log_link_info(link, "Gained carrier");
0d4ad91d 1974
0d411b7f 1975 r = link_carrier_gained(link);
30de2b89
YW		 1976 if (r < 0)
1977 return r;
0d411b7f
YW		 1978 } else if (had_carrier && !link_has_carrier(link)) {
1979 log_link_info(link, "Lost carrier");
1980
1981 r = link_carrier_lost(link);
0b54c870
YW		 1982 if (r < 0)
1983 return r;
b8941f74
TG		 1984 }
1985
0d411b7f
YW		 1986 return 0;
1987}
afe7fd56 1988
0d411b7f
YW		 1989static int link_update_master(Link *link, sd_netlink_message *message) {
1990 int master_ifindex, r;
7465dd22 1991
0d411b7f
YW		 1992 assert(link);
1993 assert(message);
69629de9 1994
0d411b7f
YW		 1995 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1996 if (r == -ENODATA)
1997 return 0;
1998 if (r < 0)
1999 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2000
571bf1aa
YW		 2001 if (master_ifindex == link->ifindex)
2002 master_ifindex = 0;
2003
0d411b7f
YW		 2004 if (master_ifindex == link->master_ifindex)
2005 return 0;
807667f7 2006
0d411b7f 2007 if (link->master_ifindex == 0)
8458ca26 2008 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 2009 else if (master_ifindex == 0)
8458ca26 2010 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 2011 else
e2341b6b
DT		 2012 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2013 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2014
0d411b7f 2015 link_drop_from_master(link);
807667f7 2016
0d411b7f 2017 link->master_ifindex = master_ifindex;
413708d1 2018
0d411b7f
YW		 2019 r = link_append_to_master(link);
2020 if (r < 0)
2021 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2022
0d411b7f
YW		 2023 return 0;
2024}
807667f7 2025
e1658632
YW		 2026static int link_update_driver(Link *link, sd_netlink_message *message) {
2027 int r;
2028
2029 assert(link);
2030 assert(link->manager);
2031 assert(message);
2032
2033 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2034 if (link->ethtool_driver_read)
e1658632
YW		 2035 return 0;
2036
2037 /* When udevd is running, read the driver after the interface is initialized by udevd.
2038 * Otherwise, ethtool may not work correctly. See issue #22538.
2039 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2040 if (udev_available() && !link->dev)
e1658632
YW		 2041 return 0;
2042
6625c39e
YW		 2043 link->ethtool_driver_read = true;
2044
e1658632
YW		 2045 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2046 if (r < 0) {
2047 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2048 return 0;
2049 }
2050
2051 log_link_debug(link, "Found driver: %s", strna(link->driver));
2052
2053 if (streq_ptr(link->driver, "dsa")) {
2054 uint32_t dsa_master_ifindex = 0;
2055
2056 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2057 if (r < 0 && r != -ENODATA)
2058 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2059
2060 if (dsa_master_ifindex > INT_MAX) {
2061 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2062 dsa_master_ifindex);
2063 dsa_master_ifindex = 0;
2064 }
2065
2066 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2067 }
2068
40695457 2069 return 1; /* needs reconfigure */
e1658632
YW		 2070}
2071
6625c39e 2072static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2073 int r;
2074
2075 assert(link);
2076 assert(link->manager);
2077 assert(message);
2078
6625c39e 2079 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2080 return 0;
2081
2082 /* When udevd is running, read the permanent hardware address after the interface is
2083 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2084 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2085 if (udev_available() && !link->dev)
2086 return 0;
2087
2088 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2089 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2090 if (r == -ENODATA)
2091 return 0;
2092 if (r < 0)
2093 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2094
2095 link->ethtool_permanent_hw_addr_read = true;
2096
2097 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2098 if (r < 0)
2099 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2100
2101 return 0;
2102}
2103
2104static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2105 int r;
2106
2107 assert(link);
2108 assert(link->manager);
2109 assert(message);
2110
2111 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2112 return 0;
2113
2114 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2115 if (r < 0) {
2116 if (r != -ENODATA)
2117 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2118
6625c39e
YW		 2119 /* Fallback to ethtool for older kernels. */
2120 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2121 if (r < 0)
2122 return r;
e1658632
YW		 2123 }
2124
2125 if (link->permanent_hw_addr.length > 0)
2126 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2127
40695457 2128 return 1; /* needs reconfigure */
e1658632
YW		 2129}
2130
0d411b7f 2131static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2132 struct hw_addr_data addr;
0d411b7f 2133 int r;
d93d655c 2134
0d411b7f
YW		 2135 assert(link);
2136 assert(message);
dfc58b47 2137
0d411b7f
YW		 2138 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2139 if (r < 0 && r != -ENODATA)
2140 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2141
e2bacccd 2142 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2143 if (r == -ENODATA)
2144 return 0;
2145 if (r < 0)
fe321d45 2146 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2147
e2bacccd 2148 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2149 return 0;
a61bb41c 2150
de0f1579 2151 if (link->hw_addr.length == 0)
e2bacccd 2152 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2153 else {
e2341b6b
DT		 2154 log_link_debug(link, "Hardware address is changed: %s %s %s",
2155 HW_ADDR_TO_STR(&link->hw_addr),
2156 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2157 HW_ADDR_TO_STR(&addr));
0d411b7f 2158
e74f1d07 2159 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2160 }
2161
e2bacccd
YW		 2162 link->hw_addr = addr;
2163
fe321d45
YW		 2164 if (!hw_addr_is_null(&link->hw_addr)) {
2165 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2166 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2167 /* bonding master and its slaves have the same hardware address. */
2168 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2169 if (r < 0)
2170 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2171 }
0d411b7f 2172
0a14f83a 2173 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2174 if (r < 0)
2175 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2176
0d411b7f 2177 r = ipv4ll_update_mac(link);
a61bb41c 2178 if (r < 0)
0d411b7f 2179 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2180
0d411b7f
YW		 2181 r = dhcp4_update_mac(link);
2182 if (r < 0)
2183 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2184
0d411b7f
YW		 2185 r = dhcp6_update_mac(link);
2186 if (r < 0)
2187 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2188
2189 r = radv_update_mac(link);
2190 if (r < 0)
2191 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2192
3be64aa4 2193 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2194 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2195 if (r < 0)
0d411b7f
YW		 2196 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2197 }
d236718c 2198
35778343
YW		 2199 if (link->lldp_rx) {
2200 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2201 if (r < 0)
c01b9b87
YW		 2202 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2203 }
2204
2205 if (link->lldp_tx) {
2206 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2207 if (r < 0)
2208 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2209 }
2210
40695457 2211 return 1; /* needs reconfigure */
0d411b7f 2212}
a61bb41c 2213
0d411b7f 2214static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2215 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2216 int r;
a61bb41c 2217
0d411b7f
YW		 2218 assert(link);
2219 assert(message);
2220
2221 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2222 if (r == -ENODATA)
2223 return 0;
2224 if (r < 0)
2225 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2226 if (mtu == 0)
2227 return 0;
0d411b7f 2228
717ba5fc
YW		 2229 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2230 if (r < 0 && r != -ENODATA)
2231 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2232
2233 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2234 if (r < 0 && r != -ENODATA)
2235 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2236
717ba5fc
YW		 2237 if (max_mtu == 0)
2238 max_mtu = UINT32_MAX;
2239
2240 link->min_mtu = min_mtu;
2241 link->max_mtu = max_mtu;
2242
0d411b7f
YW		 2243 if (link->original_mtu == 0) {
2244 link->original_mtu = mtu;
717ba5fc
YW		 2245 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2246 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2247 }
2248
717ba5fc
YW		 2249 if (link->mtu == mtu)
2250 return 0;
2251
b5d0fd1e 2252 if (link->mtu != 0)
e2341b6b
DT		 2253 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2254 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2255 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2256
2257 link->mtu = mtu;
2258
2259 if (link->dhcp_client) {
2260 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2261 if (r < 0)
0d411b7f
YW		 2262 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2263 }
a61bb41c 2264
0d411b7f
YW		 2265 if (link->radv) {
2266 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2267 if (r < 0)
0d411b7f 2268 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2269 }
2270
2271 return 0;
dd3efc09 2272}
fe8db0c5 2273
0d411b7f
YW		 2274static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2275 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2276 int r;
2277
2278 assert(link);
2279 assert(message);
2280
2281 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2282 if (r == -ENODATA)
2368ff81 2283 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2284 * interface has no alternative name. */
2285 return 0;
2286 if (r < 0)
0d411b7f
YW		 2287 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2288
1b345c1e
YW		 2289 if (strv_equal(altnames, link->alternative_names))
2290 return 0;
2291
0d411b7f
YW		 2292 STRV_FOREACH(n, link->alternative_names)
2293 hashmap_remove(link->manager->links_by_name, *n);
2294
2295 strv_free_and_replace(link->alternative_names, altnames);
2296
2297 STRV_FOREACH(n, link->alternative_names) {
2298 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2299 if (r < 0)
2300 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2301 }
2302
40695457 2303 return 1; /* needs reconfigure */
0d411b7f
YW		 2304}
2305
2306static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2307 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2308 const char *ifname;
2309 int r;
2310
2311 assert(link);
2312 assert(message);
2313
2314 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2315 if (r == -ENODATA)
7802194a 2316 /* Hmm?? But ok. */
0d411b7f
YW		 2317 return 0;
2318 if (r < 0)
2319 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2320
2321 if (streq(ifname, link->ifname))
2322 return 0;
2323
01afd0f7
YW		 2324 r = format_ifname(link->ifindex, ifname_from_index);
2325 if (r < 0)
2326 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2327
2328 if (!streq(ifname, ifname_from_index)) {
2329 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2330 "with the name currently configured on the actual interface '%s'. Ignoring.",
2331 ifname, ifname_from_index);
2332 return 0;
2333 }
2334
0d411b7f
YW		 2335 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2336
2337 hashmap_remove(link->manager->links_by_name, link->ifname);
2338
2339 r = free_and_strdup(&link->ifname, ifname);
2340 if (r < 0)
2341 return log_oom_debug();
2342
2343 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2344 if (r < 0)
2345 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2346
54d1fdb2
YW		 2347 if (link->dhcp_client) {
2348 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2349 if (r < 0)
2350 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2351 }
2352
2353 if (link->dhcp6_client) {
2354 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2355 if (r < 0)
2356 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2357 }
2358
2359 if (link->ndisc) {
2360 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2361 if (r < 0)
2362 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2363 }
2364
2365 if (link->dhcp_server) {
2366 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2367 if (r < 0)
2368 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2369 }
2370
2371 if (link->radv) {
2372 r = sd_radv_set_ifname(link->radv, link->ifname);
2373 if (r < 0)
2374 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2375 }
2376
35778343
YW		 2377 if (link->lldp_rx) {
2378 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2379 if (r < 0)
c01b9b87
YW		 2380 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2381 }
2382
2383 if (link->lldp_tx) {
2384 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2385 if (r < 0)
2386 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2387 }
2388
2389 if (link->ipv4ll) {
2390 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2391 if (r < 0)
2392 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2393 }
2394
86173383
YW		 2395 r = ipv4acd_set_ifname(link);
2396 if (r < 0)
2397 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2398
40695457 2399 return 1; /* needs reconfigure */
0d411b7f
YW		 2400}
2401
2402static int link_update(Link *link, sd_netlink_message *message) {
40695457 2403 bool needs_reconfigure = false;
0d411b7f
YW		 2404 int r;
2405
2406 assert(link);
2407 assert(message);
2408
2409 r = link_update_name(link, message);
2410 if (r < 0)
2411 return r;
40695457 2412 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2413
2414 r = link_update_alternative_names(link, message);
2415 if (r < 0)
2416 return r;
40695457 2417 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2418
2419 r = link_update_mtu(link, message);
2420 if (r < 0)
2421 return r;
2422
e1658632
YW		 2423 r = link_update_driver(link, message);
2424 if (r < 0)
2425 return r;
40695457 2426 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2427
2428 r = link_update_permanent_hardware_address(link, message);
2429 if (r < 0)
2430 return r;
40695457 2431 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2432
0d411b7f
YW		 2433 r = link_update_hardware_address(link, message);
2434 if (r < 0)
2435 return r;
40695457 2436 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2437
2438 r = link_update_master(link, message);
2439 if (r < 0)
2440 return r;
2441
7d0d832d
YW		 2442 r = link_update_ipv6ll_addrgen_mode(link, message);
2443 if (r < 0)
2444 return r;
2445
40695457
YW		 2446 r = link_update_flags(link, message);
2447 if (r < 0)
2448 return r;
2449
11cee6ef
YW		 2450 r = link_update_bridge_vlan(link, message);
2451 if (r < 0)
2452 return r;
2453
40695457 2454 return needs_reconfigure;
0d411b7f
YW		 2455}
2456
0c9ee5d5
YW		 2457static Link *link_drop_or_unref(Link *link) {
2458 if (!link)
2459 return NULL;
2460 if (!link->manager)
2461 return link_unref(link);
2462 return link_drop(link);
2463}
2464
2465DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2466
2467static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2468 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2469 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2470 unsigned short iftype;
2471 int r, ifindex;
0c9ee5d5
YW		 2472
2473 assert(manager);
2474 assert(message);
2475 assert(ret);
2476
0c9ee5d5
YW		 2477 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2478 if (r < 0)
0d411b7f 2479 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2480 else if (ifindex <= 0)
0d411b7f 2481 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2482
2483 r = sd_rtnl_message_link_get_type(message, &iftype);
2484 if (r < 0)
0d411b7f 2485 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2486
2487 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2488 if (r < 0)
0d411b7f 2489 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2490
2491 /* check for link kind */
2492 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2493 if (r >= 0) {
0d411b7f
YW		 2494 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2495 if (r < 0 && r != -ENODATA)
2496 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2497 r = sd_netlink_message_exit_container(message);
2498 if (r < 0)
0d411b7f 2499 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2500 }
2501
4c78dc17
YW		 2502 if (!manager->test_mode) {
2503 /* Do not update state files when running in test mode. */
2504 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2505 return log_oom_debug();
0d411b7f 2506
4c78dc17
YW		 2507 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2508 return log_oom_debug();
0d411b7f 2509
4c78dc17
YW		 2510 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2511 return log_oom_debug();
2512 }
0d411b7f 2513
0c9ee5d5
YW		 2514 link = new(Link, 1);
2515 if (!link)
2516 return -ENOMEM;
2517
2518 *link = (Link) {
2519 .n_ref = 1,
2520 .state = LINK_STATE_PENDING,
2521 .online_state = _LINK_ONLINE_STATE_INVALID,
2522 .ifindex = ifindex,
2523 .iftype = iftype,
2524 .ifname = TAKE_PTR(ifname),
2525 .kind = TAKE_PTR(kind),
2526
11cee6ef
YW		 2527 .bridge_vlan_pvid = UINT16_MAX,
2528
7d0d832d
YW		 2529 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2530
0d411b7f
YW		 2531 .state_file = TAKE_PTR(state_file),
2532 .lease_file = TAKE_PTR(lease_file),
2533 .lldp_file = TAKE_PTR(lldp_file),
2534
0c9ee5d5
YW		 2535 .n_dns = UINT_MAX,
2536 .dns_default_route = -1,
2537 .llmnr = _RESOLVE_SUPPORT_INVALID,
2538 .mdns = _RESOLVE_SUPPORT_INVALID,
2539 .dnssec_mode = _DNSSEC_MODE_INVALID,
2540 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2541 };
2542
6eab614d 2543 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2544 if (r < 0)
0d411b7f 2545 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2546
2547 link->manager = manager;
2548
0d411b7f 2549 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2550 if (r < 0)
0d411b7f 2551 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2552
8a77e245
YW		 2553 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2554 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2555
9c5b8d46
AŠ		 2556 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2557 * message arrived too early. Request the wireless link information again.
2558 */
2559 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2560 r = link_get_wlan_interface(link);
2561 if (r < 0)
2562 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2563 }
2564
0c9ee5d5 2565 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2566 return 0;
2567}
2568
0d411b7f 2569int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2570 Link *link = NULL;
2571 NetDev *netdev = NULL;
2572 uint16_t type;
2573 const char *name;
2574 int r, ifindex;
2575
2576 assert(rtnl);
2577 assert(message);
0d411b7f 2578 assert(manager);
3be9d62a
YW		 2579
2580 if (sd_netlink_message_is_error(message)) {
2581 r = sd_netlink_message_get_errno(message);
2582 if (r < 0)
2583 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2584
2585 return 0;
2586 }
2587
2588 r = sd_netlink_message_get_type(message, &type);
2589 if (r < 0) {
2590 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2591 return 0;
2592 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2593 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2594 return 0;
2595 }
2596
2597 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2598 if (r < 0) {
2599 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2600 return 0;
2601 } else if (ifindex <= 0) {
2602 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2603 return 0;
2604 }
2605
2606 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2607 if (r < 0) {
2608 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2609 return 0;
2610 }
2611
6eab614d 2612 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2613 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2614
2615 switch (type) {
2616 case RTM_NEWLINK:
0d411b7f
YW		 2617 if (netdev) {
2618 /* netdev exists, so make sure the ifindex matches */
2619 r = netdev_set_ifindex(netdev, message);
2620 if (r < 0) {
66141164 2621 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2622 return 0;
2623 }
2624 }
2625
3be9d62a
YW		 2626 if (!link) {
2627 /* link is new, so add it */
0d411b7f 2628 r = link_new(manager, message, &link);
3be9d62a 2629 if (r < 0) {
0d411b7f 2630 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2631 return 0;
2632 }
3be9d62a 2633
0d411b7f 2634 r = link_update(link, message);
3be9d62a 2635 if (r < 0) {
66141164 2636 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2637 link_enter_failed(link);
3be9d62a
YW		 2638 return 0;
2639 }
3be9d62a 2640
0d411b7f
YW		 2641 r = link_check_initialized(link);
2642 if (r < 0) {
66141164 2643 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2644 link_enter_failed(link);
2645 return 0;
2646 }
2647 } else {
2648 r = link_update(link, message);
2649 if (r < 0) {
66141164 2650 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2651 link_enter_failed(link);
2652 return 0;
2653 }
40695457
YW		 2654 if (r > 0) {
2655 r = link_reconfigure_impl(link, /* force = */ false);
2656 if (r < 0) {
2657 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2658 link_enter_failed(link);
2659 return 0;
2660 }
2661 }
3be9d62a 2662 }
3be9d62a
YW		 2663 break;
2664
2665 case RTM_DELLINK:
2666 link_drop(link);
2667 netdev_drop(netdev);
3be9d62a
YW		 2668 break;
2669
2670 default:
04499a70 2671 assert_not_reached();
3be9d62a
YW		 2672 }
2673
2674 return 1;
2675}
2676
79c6e114
YW		 2677int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2678 uint16_t message_type;
2679 int r;
2680
2681 assert(m);
2682 assert(link);
2683 assert(error_msg);
2684
2685 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2686 return 0;
2687
2688 r = sd_netlink_message_get_errno(m);
2689 if (r < 0) {
2690 log_link_message_warning_errno(link, m, r, error_msg);
2691 link_enter_failed(link);
2692 return 0;
2693 }
2694
2695 r = sd_netlink_message_get_type(m, &message_type);
2696 if (r < 0) {
2697 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2698 return 0;
2699 }
2700 if (message_type != RTM_NEWLINK) {
2701 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2702 return 0;
2703 }
2704
2705 r = link_update(link, m);
2706 if (r < 0) {
2707 link_enter_failed(link);
2708 return 0;
2709 }
2710
2711 return 1;
2712}
2713
2714int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2715 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2716 int r;
2717
2718 assert(link);
2719 assert(link->manager);
2720 assert(link->manager->rtnl);
2721 assert(callback);
2722
2723 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2724 if (r < 0)
2725 return r;
2726
2727 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2728 link_netlink_destroy_callback, link);
2729 if (r < 0)
2730 return r;
2731
2732 link_ref(link);
2733 return 0;
2734}
2735
fe8db0c5 2736static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2737 [LINK_STATE_PENDING] = "pending",
bd08ce56 2738 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2739 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2740 [LINK_STATE_CONFIGURED] = "configured",
2741 [LINK_STATE_UNMANAGED] = "unmanaged",
2742 [LINK_STATE_FAILED] = "failed",
2743 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2744};
2745
2746DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2747
2748int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2749 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2750 static const char* map[] = {
2751 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2752 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2753 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2754 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2755 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2756 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2757 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2758 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2759 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2760 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2761 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2762 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2763 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2764 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2765 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2766 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2767 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2768 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2769 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2770 };
2771
2772 assert(ret);
2773
2774 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2775 if (FLAGS_SET(flags, 1 << i) && map[i])
2776 if (!strextend_with_separator(&str, ",", map[i]))
2777 return -ENOMEM;
7ae55b78
YW		 2778
2779 *ret = TAKE_PTR(str);
2780 return 0;
2781}
2782
2783static const char * const kernel_operstate_table[] = {
2784 [IF_OPER_UNKNOWN] = "unknown",
2785 [IF_OPER_NOTPRESENT] = "not-present",
2786 [IF_OPER_DOWN] = "down",
2787 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2788 [IF_OPER_TESTING] = "testing",
2789 [IF_OPER_DORMANT] = "dormant",
2790 [IF_OPER_UP] = "up",
2791};
2792
2793DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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