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test: reinitialize arg_transport before parsing arguments
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
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"
bd91b83e 20#include "dhcp-lease-internal.h"
686d13b9 21#include "env-file.h"
4bb7cc82 22#include "ethtool-util.h"
6706ce2f 23#include "event-util.h"
3ffd4af2 24#include "fd-util.h"
cf1d700d 25#include "fileio.h"
176b8be1 26#include "format-util.h"
af664001 27#include "fs-util.h"
e2341b6b 28#include "glyph-util.h"
3ae6b3bf 29#include "logarithm.h"
ef118d00 30#include "missing_network.h"
cf1d700d 31#include "netlink-util.h"
c6f7c917 32#include "network-internal.h"
fb486c90 33#include "networkd-address-label.h"
093e3533 34#include "networkd-address.h"
9671ae9d 35#include "networkd-bridge-fdb.h"
ff9e0783 36#include "networkd-bridge-mdb.h"
11cee6ef 37#include "networkd-bridge-vlan.h"
3ddcbeea 38#include "networkd-can.h"
d5ebcf65 39#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 40#include "networkd-dhcp-server.h"
ca5ad760
YW		 41#include "networkd-dhcp4.h"
42#include "networkd-dhcp6.h"
76a86ffd 43#include "networkd-ipv4acd.h"
ca5ad760 44#include "networkd-ipv4ll.h"
76c5a0f2 45#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 46#include "networkd-link-bus.h"
47#include "networkd-link.h"
8e1ad1ea 48#include "networkd-lldp-tx.h"
23f53b99 49#include "networkd-manager.h"
1e7a0e21 50#include "networkd-ndisc.h"
e4a71bf3 51#include "networkd-neighbor.h"
75156ccb 52#include "networkd-nexthop.h"
19d9a5ad 53#include "networkd-queue.h"
7465dd22 54#include "networkd-radv.h"
fc35a9f8 55#include "networkd-route-util.h"
3b6a3bde 56#include "networkd-route.h"
bce67bbe 57#include "networkd-routing-policy-rule.h"
0fa8ee6c 58#include "networkd-setlink.h"
19d9a5ad 59#include "networkd-sriov.h"
3b5a4fc6 60#include "networkd-state-file.h"
19d9a5ad 61#include "networkd-sysctl.h"
986b2514 62#include "networkd-wifi.h"
cf1d700d
TG		 63#include "set.h"
64#include "socket-util.h"
15a5e950 65#include "stdio-util.h"
8b43440b 66#include "string-table.h"
51517f9e 67#include "strv.h"
34658df2 68#include "tc.h"
e4de7287 69#include "tmpfile-util.h"
af7a86b8 70#include "tuntap.h"
299ad32d 71#include "udev-util.h"
737f1405 72#include "vrf.h"
fc2f9534 73
5e0534f1 74bool link_ipv6_enabled(Link *link) {
439689c6
SS		 75 assert(link);
76
77 if (!socket_ipv6_is_supported())
78 return false;
79
5fb5fae9 80 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 81 return false;
82
5fb5fae9
YW		 83 if (!link->network)
84 return false;
85
86 if (link->network->bond)
af9ba57a
YW		 87 return false;
88
bd7e0a3f 89 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 90 return true;
91
92 if (network_has_static_ipv6_configurations(link->network))
93 return true;
94
95 return false;
439689c6
SS		 96}
97
fc35a9f8
YW		 98bool link_has_ipv6_connectivity(Link *link) {
99 LinkAddressState ipv6_address_state;
100
101 assert(link);
102
103 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
104
105 switch (ipv6_address_state) {
106 case LINK_ADDRESS_STATE_ROUTABLE:
107 /* If the interface has a routable IPv6 address, then we assume yes. */
108 return true;
109
110 case LINK_ADDRESS_STATE_DEGRADED:
111 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
112 * there is an IPv6 default gateway. */
113 return link_has_default_gateway(link, AF_INET6);
114
115 case LINK_ADDRESS_STATE_OFF:
116 /* No IPv6 address. */
117 return false;
118
119 default:
120 assert_not_reached();
121 }
122}
123
e33232d4 124static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 125 assert(link);
126
d8d4db58
YW		 127 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
128 return false;
129
2fd3908b
YW		 130 if (!link->network)
131 return allow_unmanaged;
7191a57a 132
baa95d22
YW		 133 if (!link->network->configure_without_carrier) {
134 if (link->set_flags_messages > 0)
135 return false;
136
137 if (!link_has_carrier(link))
138 return false;
139 }
7191a57a 140
0fa8ee6c
YW		 141 if (link->set_link_messages > 0)
142 return false;
143
112a0972
YW		 144 if (!link->activated)
145 return false;
112a0972 146
7191a57a
YW		 147 return true;
148}
149
e33232d4
YW		 150bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
151 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
152}
153
15761549
YW		 154void link_ntp_settings_clear(Link *link) {
155 link->ntp = strv_free(link->ntp);
156}
157
158void link_dns_settings_clear(Link *link) {
f5fbe71d 159 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 160 for (unsigned i = 0; i < link->n_dns; i++)
161 in_addr_full_free(link->dns[i]);
15761549 162 link->dns = mfree(link->dns);
f5fbe71d 163 link->n_dns = UINT_MAX;
15761549 164
6e4571f0
YW		 165 link->search_domains = ordered_set_free(link->search_domains);
166 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 167
168 link->dns_default_route = -1;
169 link->llmnr = _RESOLVE_SUPPORT_INVALID;
170 link->mdns = _RESOLVE_SUPPORT_INVALID;
171 link->dnssec_mode = _DNSSEC_MODE_INVALID;
172 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
173
174 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
175}
176
1a6bb31f
YW		 177static void link_free_engines(Link *link) {
178 if (!link)
179 return;
180
181 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 182
1a6bb31f
YW		 183 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
184 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 185 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 186
35778343 187 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 188 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 189
5385e5f9
YW		 190 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
191
1a6bb31f 192 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 193
1a6bb31f 194 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 195 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 196
1a6bb31f 197 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 198 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
199 ndisc_flush(link);
200
1a6bb31f
YW		 201 link->radv = sd_radv_unref(link->radv);
202}
203
8301aa0b 204static Link *link_free(Link *link) {
8301aa0b 205 assert(link);
f579559b 206
15761549
YW		 207 link_ntp_settings_clear(link);
208 link_dns_settings_clear(link);
209
8eec0b9d 210 link->routes = set_free(link->routes);
8eec0b9d 211 link->neighbors = set_free(link->neighbors);
8eec0b9d 212 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 213 link->qdiscs = set_free(link->qdiscs);
214 link->tclasses = set_free(link->tclasses);
adda1ed9 215
a27588d4 216 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 217
1a6bb31f 218 link_free_engines(link);
49699bac 219
b0ff6dea 220 set_free(link->sr_iov_virt_port_ifindices);
c166a070 221 free(link->ifname);
572b21d9 222 strv_free(link->alternative_names);
ceac4078 223 free(link->kind);
8d968fdd 224 free(link->ssid);
6706ce2f 225 free(link->previous_ssid);
c643bda5 226 free(link->driver);
6cad256d 227
a34e58d4
YW		 228 unlink_and_free(link->lease_file);
229 unlink_and_free(link->lldp_file);
230 unlink_and_free(link->state_file);
c166a070 231
8de56fb3 232 sd_device_unref(link->dev);
9aa2585e 233 netdev_unref(link->netdev);
b5db00e5 234
0d4ad91d 235 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 236 hashmap_free(link->bound_by_links);
237
5f707e12 238 set_free_with_destructor(link->slaves, link_unref);
033295c1 239
c9c908a6
YW		 240 network_unref(link->network);
241
6706ce2f
YW		 242 sd_event_source_disable_unref(link->carrier_lost_timer);
243
8301aa0b 244 return mfree(link);
14b746f7
TG		 245}
246
8301aa0b 247DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 248
6eab614d 249int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 250 Link *link;
11a7f229
TG		 251
252 assert(m);
c2aed128
YW		 253
254 if (ifindex <= 0)
255 return -EINVAL;
11a7f229 256
6eab614d 257 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 258 if (!link)
259 return -ENODEV;
260
0b54c870
YW		 261 if (ret)
262 *ret = link;
263 return 0;
264}
265
266int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
267 Link *link;
268
269 assert(m);
270 assert(ifname);
11a7f229 271
0b54c870
YW		 272 link = hashmap_get(m->links_by_name, ifname);
273 if (!link)
274 return -ENODEV;
275
276 if (ret)
277 *ret = link;
11a7f229
TG		 278 return 0;
279}
280
fe321d45
YW		 281int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
282 Link *link;
283
284 assert(m);
285 assert(hw_addr);
286
287 link = hashmap_get(m->links_by_hw_addr, hw_addr);
288 if (!link)
289 return -ENODEV;
290
291 if (ret)
292 *ret = link;
293 return 0;
294}
295
81357285
YW		 296int link_get_master(Link *link, Link **ret) {
297 assert(link);
298 assert(link->manager);
299 assert(ret);
300
301 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
302 return -ENODEV;
303
6eab614d 304 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 305}
306
af9ba57a 307void link_set_state(Link *link, LinkState state) {
e331e246
TG		 308 assert(link);
309
310 if (link->state == state)
311 return;
312
0beb9542
YW		 313 log_link_debug(link, "State changed: %s -> %s",
314 link_state_to_string(link->state),
315 link_state_to_string(state));
316
e331e246
TG		 317 link->state = state;
318
319 link_send_changed(link, "AdministrativeState", NULL);
9092113d 320 link_dirty(link);
e331e246
TG		 321}
322
2a99eed0 323int link_stop_engines(Link *link, bool may_keep_dhcp) {
372acaad 324 int r, ret = 0;
111bb8f9
TG		 325
326 assert(link);
327 assert(link->manager);
328 assert(link->manager->event);
329
80060352
ZJS		 330 bool keep_dhcp = may_keep_dhcp &&
331 link->network &&
76a86ffd 332 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 333 (link->manager->restarting ||
334 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
335
84add3cd 336 if (!keep_dhcp) {
372acaad
YW		 337 r = sd_dhcp_client_stop(link->dhcp_client);
338 if (r < 0)
339 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m"));
111bb8f9
TG		 340 }
341
372acaad
YW		 342 r = sd_dhcp_server_stop(link->dhcp_server);
343 if (r < 0)
344 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 server: %m"));
2a99eed0 345
372acaad
YW		 346 r = sd_lldp_rx_stop(link->lldp_rx);
347 if (r < 0)
348 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Rx: %m"));
c01b9b87 349
372acaad
YW		 350 r = sd_lldp_tx_stop(link->lldp_tx);
351 if (r < 0)
352 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Tx: %m"));
9cc65242 353
372acaad
YW		 354 r = sd_ipv4ll_stop(link->ipv4ll);
355 if (r < 0)
356 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m"));
dd43110f 357
372acaad
YW		 358 r = ipv4acd_stop(link);
359 if (r < 0)
360 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 ACD client: %m"));
051e77ca 361
372acaad
YW		 362 r = sd_dhcp6_client_stop(link->dhcp6_client);
363 if (r < 0)
364 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m"));
4138fb2c 365
372acaad
YW		 366 r = dhcp_pd_remove(link, /* only_marked = */ false);
367 if (r < 0)
368 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not remove DHCPv6 PD addresses and routes: %m"));
1633c457 369
372acaad
YW		 370 r = ndisc_stop(link);
371 if (r < 0)
372 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Discovery: %m"));
4138fb2c 373
259c65f3
YW		 374 ndisc_flush(link);
375
372acaad
YW		 376 r = sd_radv_stop(link->radv);
377 if (r < 0)
378 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Advertisement: %m"));
7465dd22 379
372acaad 380 return ret;
111bb8f9
TG		 381}
382
b22d8a00 383void link_enter_failed(Link *link) {
ef1ba606 384 assert(link);
f882c247 385
370e9930 386 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 387 return;
388
6a7a4e4d 389 log_link_warning(link, "Failed");
449f7554 390
e331e246 391 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 392
2a99eed0 393 (void) link_stop_engines(link, false);
f882c247
TG		 394}
395
6accfd31
DA		 396void link_check_ready(Link *link) {
397 Address *a;
6accfd31
DA		 398
399 assert(link);
400
5f58af25
YW		 401 if (link->state == LINK_STATE_CONFIGURED)
402 return;
403
d19b9939
YW		 404 if (link->state != LINK_STATE_CONFIGURING)
405 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 406
407 if (!link->network)
a7f07cbe 408 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 409
7558f9e7
YW		 410 if (!link->tc_configured)
411 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 412
a7f07cbe
YW		 413 if (link->set_link_messages > 0)
414 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
415
416 if (!link->activated)
417 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
418
7558f9e7
YW		 419 if (link->iftype == ARPHRD_CAN) {
420 /* let's shortcut things for CAN which doesn't need most of checks below. */
421 link_set_state(link, LINK_STATE_CONFIGURED);
422 return;
423 }
424
879377ca
YW		 425 if (!link->stacked_netdevs_created)
426 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
427
76c5a0f2 428 if (!link->static_addresses_configured)
d19b9939 429 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 430
354bc760
YW		 431 if (!link->static_address_labels_configured)
432 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
433
e5b35bf6
YW		 434 if (!link->static_bridge_fdb_configured)
435 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
436
ff9e0783
YW		 437 if (!link->static_bridge_mdb_configured)
438 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
439
fdeba3f5
YW		 440 if (!link->static_ipv6_proxy_ndp_configured)
441 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
442
40ca350e
YW		 443 if (!link->static_neighbors_configured)
444 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
445
d19b9939
YW		 446 if (!link->static_nexthops_configured)
447 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 448
76c5a0f2
YW		 449 if (!link->static_routes_configured)
450 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
451
0e5ef6be 452 if (!link->static_routing_policy_rules_configured)
d19b9939 453 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 454
d19b9939
YW		 455 if (!link->sr_iov_configured)
456 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 457
4bcb8625
YW		 458 /* IPv6LL is assigned after the link gains its carrier. */
459 if (!link->network->configure_without_carrier &&
460 link_ipv6ll_enabled(link) &&
461 !in6_addr_is_set(&link->ipv6ll_address))
462 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
463
9e7d91ed
YW		 464 /* All static addresses must be ready. */
465 bool has_static_address = false;
466 SET_FOREACH(a, link->addresses) {
467 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
468 continue;
469 if (!address_is_ready(a))
470 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
471 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
472 has_static_address = true;
473 }
474
475 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
476 if (has_static_address)
477 goto ready;
478
5f950e56
YW		 479 /* If no dynamic addressing protocol enabled, assume the interface is ready.
480 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
481 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
482 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
483 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
484 goto ready;
485
486 bool ipv4ll_ready =
487 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
488 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
489 bool dhcp4_ready =
490 link_dhcp4_enabled(link) && link->dhcp4_configured &&
491 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
492 bool dhcp6_ready =
493 link_dhcp6_enabled(link) && link->dhcp6_configured &&
494 (!link->network->dhcp6_use_address ||
495 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
496 bool dhcp_pd_ready =
497 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
498 (!link->network->dhcp_pd_assign ||
499 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
500 bool ndisc_ready =
501 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
502 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
503 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
504
195b83ed
YW		 505 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
506 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
507 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 508 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
195b83ed
YW		 509 if (!dhcp4_ready)
510 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
511 if (!dhcp_pd_ready)
512 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
513 }
514
515 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 516 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
195b83ed
YW		 517 if (!dhcp6_ready)
518 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
519 if (!dhcp_pd_ready)
520 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
521 }
522 }
523
5f950e56
YW		 524 /* At least one dynamic addressing protocol is finished. */
525 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
526 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
527
528 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
529 __func__,
530 yes_no(ipv4ll_ready),
531 yes_no(dhcp4_ready),
532 yes_no(dhcp6_ready),
533 yes_no(dhcp_pd_ready),
534 yes_no(ndisc_ready));
535
536ready:
29836c16 537 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 538}
539
97108953 540static int link_request_static_configs(Link *link) {
f882c247
TG		 541 int r;
542
543 assert(link);
544 assert(link->network);
f5be5601 545 assert(link->state != _LINK_STATE_INVALID);
f882c247 546
354bc760 547 r = link_request_static_addresses(link);
0e5ef6be
YW		 548 if (r < 0)
549 return r;
550
354bc760 551 r = link_request_static_address_labels(link);
f3ef324d
YW		 552 if (r < 0)
553 return r;
e4a71bf3 554
e5b35bf6
YW		 555 r = link_request_static_bridge_fdb(link);
556 if (r < 0)
557 return r;
558
9a038aac
YW		 559 r = link_request_static_bridge_mdb(link);
560 if (r < 0)
561 return r;
562
fdeba3f5
YW		 563 r = link_request_static_ipv6_proxy_ndp_addresses(link);
564 if (r < 0)
565 return r;
566
40ca350e 567 r = link_request_static_neighbors(link);
682c65b0
YW		 568 if (r < 0)
569 return r;
bd6379ec 570
76c5a0f2 571 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 572 if (r < 0)
573 return r;
f882c247 574
76c5a0f2
YW		 575 r = link_request_static_routes(link, false);
576 if (r < 0)
577 return r;
578
579 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 580 if (r < 0)
581 return r;
d4cdbea5 582
f882c247
TG		 583 return 0;
584}
585
1187fc33
YW		 586static int link_request_stacked_netdevs(Link *link) {
587 NetDev *netdev;
e16e4b3b
DS		 588 int r;
589
590 assert(link);
591
1187fc33 592 link->stacked_netdevs_created = false;
e16e4b3b 593
1187fc33 594 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 595 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 596 if (r < 0)
597 return r;
598 }
e16e4b3b 599
bb916f35 600 if (link->create_stacked_netdev_messages == 0) {
1187fc33 601 link->stacked_netdevs_created = true;
bb916f35
YW		 602 link_check_ready(link);
603 }
e16e4b3b
DS		 604
605 return 0;
606}
607
8566df79 608static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 609 int r;
610
611 assert(link);
612
0f96a823
YW		 613 r = radv_start(link);
614 if (r < 0)
615 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 616
294f129b
YW		 617 r = ndisc_start(link);
618 if (r < 0)
619 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 620
294f129b
YW		 621 r = dhcp6_start(link);
622 if (r < 0)
623 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 624
e7ab854c
TG		 625 return 0;
626}
627
8566df79 628static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 629 int r;
630
631 assert(link);
ff254138
TG		 632 assert(link->manager);
633 assert(link->manager->event);
634
0107b769 635 if (link->dhcp_client) {
294f129b 636 r = dhcp4_start(link);
0107b769 637 if (r < 0)
294f129b 638 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 639
ccffa166 640 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 641
ccffa166 642 } else if (link->ipv4ll) {
59c27231
AK		 643 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
644 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
645 if (r < 0)
646 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
647 }
648
5c1d3fc9 649 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 650 if (r < 0)
651 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 652
653 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 654 }
655
ab486ef4
YW		 656 if (link->dhcp_server) {
657 r = sd_dhcp_server_start(link->dhcp_server);
658 if (r < 0)
659 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
660 }
661
76a86ffd
YW		 662 r = ipv4acd_start(link);
663 if (r < 0)
664 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
665
6fc25497
SS		 666 return 0;
667}
668
8566df79 669static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 670 int r;
671
672 assert(link);
0f96a823 673 assert(link->network);
6fc25497 674
8566df79 675 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 676 if (r < 0)
677 return r;
678
94876904 679 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 680 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 681 if (r < 0)
682 return r;
683 }
684
a27588d4 685 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 686 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
687 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
688 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
689 * below will be called in radv_start(). */
a27588d4 690 r = dhcp_request_prefix_delegation(link);
0f96a823 691 if (r < 0)
a27588d4 692 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 693 }
694
c01b9b87
YW		 695 if (link->lldp_tx) {
696 r = sd_lldp_tx_start(link->lldp_tx);
697 if (r < 0)
698 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
699 }
8e1ad1ea 700
35778343
YW		 701 if (link->lldp_rx) {
702 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 703 if (r < 0)
704 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
705 }
706
ff254138
TG		 707 return 0;
708}
709
7657ec3e 710int link_ipv6ll_gained(Link *link) {
0c9ee5d5 711 int r;
deb2e523 712
0c9ee5d5 713 assert(link);
deb2e523 714
0c9ee5d5 715 log_link_info(link, "Gained IPv6LL");
deb2e523 716
7657ec3e
YW		 717 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
718 return 0;
0c9ee5d5 719
7657ec3e
YW		 720 r = link_acquire_dynamic_ipv6_conf(link);
721 if (r < 0)
722 return r;
0c9ee5d5 723
7657ec3e 724 link_check_ready(link);
0c9ee5d5 725 return 0;
deb2e523
TG		 726}
727
112a0972 728int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 729 bool required_up = false;
730 bool link_is_up = false;
852a3916 731 Link *l;
0d4ad91d
AR		 732
733 assert(link);
734
ad82f0c3
YW		 735 /* If at least one interface in bound_to_links has carrier, then make this interface up.
736 * If all interfaces in bound_to_links do not, then make this interface down. */
737
0d4ad91d
AR		 738 if (hashmap_isempty(link->bound_to_links))
739 return 0;
740
741 if (link->flags & IFF_UP)
742 link_is_up = true;
743
852a3916 744 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 745 if (link_has_carrier(l)) {
746 required_up = true;
747 break;
748 }
749
852a3916 750 if (!required_up && link_is_up)
68f52063 751 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 752 if (required_up && !link_is_up)
68f52063 753 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 754
755 return 0;
756}
757
758static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 759 Link *l;
760 int r;
761
762 assert(link);
763
ad82f0c3
YW		 764 /* Update up or down state of interfaces which depend on this interface's carrier state. */
765
0d4ad91d
AR		 766 if (hashmap_isempty(link->bound_by_links))
767 return 0;
768
852a3916 769 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 770 r = link_handle_bound_to_list(l);
771 if (r < 0)
772 return r;
773 }
774
775 return 0;
776}
777
778static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
779 int r;
780
781 assert(link);
782 assert(carrier);
783
784 if (link == carrier)
785 return 0;
786
787 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
788 return 0;
789
190b3b5c 790 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 791 if (r < 0)
792 return r;
793
9092113d
YW		 794 link_dirty(link);
795
0d4ad91d
AR		 796 return 0;
797}
798
799static int link_new_bound_by_list(Link *link) {
800 Manager *m;
801 Link *carrier;
0d4ad91d 802 int r;
0d4ad91d
AR		 803
804 assert(link);
805 assert(link->manager);
806
807 m = link->manager;
808
6eab614d 809 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 810 if (!carrier->network)
811 continue;
812
813 if (strv_isempty(carrier->network->bind_carrier))
814 continue;
815
191a3f16 816 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 817 r = link_put_carrier(link, carrier, &link->bound_by_links);
818 if (r < 0)
819 return r;
0d4ad91d
AR		 820 }
821 }
822
90e74a66 823 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 824 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
825 if (r < 0)
826 return r;
0d4ad91d
AR		 827 }
828
829 return 0;
830}
831
832static int link_new_bound_to_list(Link *link) {
833 Manager *m;
834 Link *carrier;
0d4ad91d 835 int r;
0d4ad91d
AR		 836
837 assert(link);
838 assert(link->manager);
839
840 if (!link->network)
841 return 0;
842
843 if (strv_isempty(link->network->bind_carrier))
844 return 0;
845
846 m = link->manager;
847
6eab614d 848 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 849 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 850 r = link_put_carrier(link, carrier, &link->bound_to_links);
851 if (r < 0)
852 return r;
0d4ad91d
AR		 853 }
854 }
855
852a3916 856 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 857 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
858 if (r < 0)
859 return r;
0d4ad91d
AR		 860 }
861
862 return 0;
863}
864
0d4ad91d 865static void link_free_bound_to_list(Link *link) {
9092113d 866 bool updated = false;
0d4ad91d 867 Link *bound_to;
0d4ad91d 868
9092113d
YW		 869 assert(link);
870
871 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
872 updated = true;
0d4ad91d
AR		 873
874 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 875 link_dirty(bound_to);
0d4ad91d
AR		 876 }
877
9092113d
YW		 878 if (updated)
879 link_dirty(link);
0d4ad91d
AR		 880}
881
882static void link_free_bound_by_list(Link *link) {
9092113d 883 bool updated = false;
0d4ad91d 884 Link *bound_by;
0d4ad91d 885
9092113d
YW		 886 assert(link);
887
888 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
889 updated = true;
0d4ad91d
AR		 890
891 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 892 link_dirty(bound_by);
0d4ad91d
AR		 893 link_handle_bound_to_list(bound_by);
894 }
895 }
896
9092113d
YW		 897 if (updated)
898 link_dirty(link);
0d4ad91d
AR		 899}
900
81357285 901static int link_append_to_master(Link *link) {
5f707e12
YW		 902 Link *master;
903 int r;
904
905 assert(link);
5f707e12 906
81357285
YW		 907 /* - The link may have no master.
908 * - RTM_NEWLINK message about master interface may not be received yet. */
909 if (link_get_master(link, &master) < 0)
910 return 0;
5f707e12 911
de7fef4b 912 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 913 if (r <= 0)
5f707e12
YW		 914 return r;
915
916 link_ref(link);
917 return 0;
918}
919
81357285 920static void link_drop_from_master(Link *link) {
5f707e12
YW		 921 Link *master;
922
923 assert(link);
924
81357285 925 if (!link->manager)
5f707e12
YW		 926 return;
927
81357285 928 if (link_get_master(link, &master) < 0)
5f707e12
YW		 929 return;
930
931 link_unref(set_remove(master->slaves, link));
932}
933
56001f02
YW		 934static void link_drop_requests(Link *link) {
935 Request *req;
936
937 assert(link);
938 assert(link->manager);
939
940 ORDERED_SET_FOREACH(req, link->manager->request_queue)
941 if (req->link == link)
e26d3d40 942 request_detach(link->manager, req);
56001f02
YW		 943}
944
cc2d7efc 945static Link *link_drop(Link *link) {
63130eb3 946 if (!link)
cc2d7efc 947 return NULL;
0d4ad91d 948
63130eb3
YW		 949 assert(link->manager);
950
0d4ad91d
AR		 951 link_set_state(link, LINK_STATE_LINGER);
952
63130eb3
YW		 953 /* Drop all references from other links and manager. Note that async netlink calls may have
954 * references to the link, and they will be dropped when we receive replies. */
955
56001f02
YW		 956 link_drop_requests(link);
957
bb193d2d
YW		 958 link_free_bound_to_list(link);
959 link_free_bound_by_list(link);
0d4ad91d 960
b0ff6dea
YW		 961 link_clear_sr_iov_ifindices(link);
962
81357285 963 link_drop_from_master(link);
5f707e12 964
4c78dc17
YW		 965 if (link->state_file)
966 (void) unlink(link->state_file);
967
63130eb3
YW		 968 link_clean(link);
969
0b54c870
YW		 970 STRV_FOREACH(n, link->alternative_names)
971 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 972 hashmap_remove(link->manager->links_by_name, link->ifname);
973
fe321d45 974 /* bonding master and its slaves have the same hardware address. */
e74f1d07 975 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 976
63130eb3 977 /* The following must be called at last. */
6eab614d 978 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 979 return link_unref(link);
0d4ad91d
AR		 980}
981
5e5b137a 982static int link_drop_foreign_config(Link *link) {
1339b950 983 int r;
0b81225e
YW		 984
985 assert(link);
986 assert(link->manager);
5e5b137a 987
5e3bb5da
YW		 988 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
989 * to remove loopback address or addresses used for root NFS. */
990
991 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
992 return 0;
993 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
994 return 0;
995 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
996 return 0;
997
e36d601c 998 r = link_drop_foreign_routes(link);
5e5b137a 999
1339b950
ZJS		 1000 RET_GATHER(r, link_drop_foreign_nexthops(link));
1001 RET_GATHER(r, link_drop_foreign_addresses(link));
1002 RET_GATHER(r, link_drop_foreign_neighbors(link));
1003 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW		 1004
1005 return r;
5e5b137a
TG		 1006}
1007
a0e99a37 1008static int link_drop_managed_config(Link *link) {
1339b950 1009 int r;
0b81225e
YW		 1010
1011 assert(link);
1012 assert(link->manager);
3104883d 1013
a0e99a37 1014 r = link_drop_managed_routes(link);
3104883d 1015
1339b950
ZJS		 1016 RET_GATHER(r, link_drop_managed_nexthops(link));
1017 RET_GATHER(r, link_drop_managed_addresses(link));
1018 RET_GATHER(r, link_drop_managed_neighbors(link));
1019 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 1020
0b81225e 1021 return r;
3104883d
SS		 1022}
1023
b4564f4e
YW		 1024static void link_foreignize_config(Link *link) {
1025 assert(link);
1026 assert(link->manager);
1027
1028 link_foreignize_routes(link);
1029 link_foreignize_nexthops(link);
1030 link_foreignize_addresses(link);
1031 link_foreignize_neighbors(link);
1032 link_foreignize_routing_policy_rules(link);
1033}
1034
c3b94251 1035static int link_configure(Link *link) {
4ecdcb07
YW		 1036 int r;
1037
ef1ba606 1038 assert(link);
b22d8a00 1039 assert(link->network);
bd08ce56 1040 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1041
1187fc33
YW		 1042 link_set_state(link, LINK_STATE_CONFIGURING);
1043
3cf58ef3
YW		 1044 r = link_new_bound_to_list(link);
1045 if (r < 0)
1046 return r;
1047
1dec9d81 1048 r = link_request_traffic_control(link);
4ecdcb07
YW		 1049 if (r < 0)
1050 return r;
1051
941f8e13
YW		 1052 r = link_configure_mtu(link);
1053 if (r < 0)
1054 return r;
1055
7558f9e7
YW		 1056 if (link->iftype == ARPHRD_CAN) {
1057 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1058 r = link_request_to_set_can(link);
1059 if (r < 0)
1060 return r;
1061
1062 return link_request_to_activate(link);
1063 }
1064
cb8453cc 1065 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1066 if (r < 0)
1067 return r;
1068
5e0534f1 1069 r = link_set_sysctl(link);
b69c3180
SS		 1070 if (r < 0)
1071 return r;
8749cbcd 1072
d05c332c 1073 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1074 if (r < 0)
1075 return r;
1076
72e65e6f
YW		 1077 r = link_request_to_set_ipoib(link);
1078 if (r < 0)
1079 return r;
1080
1187fc33 1081 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1082 if (r < 0)
1083 return r;
1084
1187fc33 1085 r = link_request_to_set_group(link);
99d2baa2
SS		 1086 if (r < 0)
1087 return r;
1088
1187fc33
YW		 1089 r = link_request_to_set_addrgen_mode(link);
1090 if (r < 0)
1091 return r;
1092
1093 r = link_request_to_set_master(link);
1094 if (r < 0)
1095 return r;
1096
1097 r = link_request_stacked_netdevs(link);
1098 if (r < 0)
1099 return r;
1100
1101 r = link_request_to_set_bond(link);
1102 if (r < 0)
1103 return r;
1104
1105 r = link_request_to_set_bridge(link);
1106 if (r < 0)
1107 return r;
1108
1109 r = link_request_to_set_bridge_vlan(link);
1110 if (r < 0)
1111 return r;
1112
1113 r = link_request_to_activate(link);
89fe6535
SS		 1114 if (r < 0)
1115 return r;
1116
2ffd6d73
YW		 1117 r = ipv4ll_configure(link);
1118 if (r < 0)
1119 return r;
64b21ece 1120
ccffa166 1121 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1122 if (r < 0)
1123 return r;
eb34d4af 1124
ccffa166 1125 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1126 if (r < 0)
1127 return r;
f5a8c43f 1128
ba4c7184 1129 r = link_request_ndisc(link);
2ffd6d73
YW		 1130 if (r < 0)
1131 return r;
4138fb2c 1132
1d28a3cf
YW		 1133 r = link_request_dhcp_server(link);
1134 if (r < 0)
1135 return r;
1136
a254fab2 1137 r = link_request_radv(link);
086b8853
YW		 1138 if (r < 0)
1139 return r;
7465dd22 1140
2ffd6d73
YW		 1141 r = link_lldp_rx_configure(link);
1142 if (r < 0)
1143 return r;
ce43e484 1144
c01b9b87
YW		 1145 r = link_lldp_tx_configure(link);
1146 if (r < 0)
1147 return r;
1148
5e3bb5da
YW		 1149 r = link_drop_foreign_config(link);
1150 if (r < 0)
1151 return r;
4c649652 1152
1187fc33
YW		 1153 r = link_request_static_configs(link);
1154 if (r < 0)
1155 return r;
1156
1157 if (!link_has_carrier(link))
1158 return 0;
1159
1160 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1161}
1162
170e88c8
YW		 1163static int link_get_network(Link *link, Network **ret) {
1164 Network *network;
1a3caa49 1165 int r;
170e88c8
YW		 1166
1167 assert(link);
1168 assert(link->manager);
1169 assert(ret);
1170
1171 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1172 bool warn = false;
1173
1a3caa49 1174 r = net_match_config(
170e88c8 1175 &network->match,
8de56fb3 1176 link->dev,
52135071
YW		 1177 &link->hw_addr,
1178 &link->permanent_hw_addr,
170e88c8
YW		 1179 link->driver,
1180 link->iftype,
65022cd7 1181 link->kind,
170e88c8
YW		 1182 link->ifname,
1183 link->alternative_names,
1184 link->wlan_iftype,
1185 link->ssid,
1a3caa49
YW		 1186 &link->bssid);
1187 if (r < 0)
1188 return r;
1189 if (r == 0)
170e88c8
YW		 1190 continue;
1191
8de56fb3 1192 if (network->match.ifname && link->dev) {
170e88c8
YW		 1193 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1194 const char *attr;
1195
8de56fb3 1196 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1197 (void) safe_atou8(attr, &name_assign_type);
1198
1199 warn = name_assign_type == NET_NAME_ENUM;
1200 }
1201
1202 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1203 "found matching network '%s'%s.",
1204 network->filename,
1205 warn ? ", based on potentially unpredictable interface name" : "");
1206
1207 if (network->unmanaged)
1208 return -ENOENT;
1209
1210 *ret = network;
1211 return 0;
1212 }
1213
1214 return -ENOENT;
1215}
1216
8a4ad01a 1217int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1218 Network *network = NULL;
9aa2585e 1219 NetDev *netdev = NULL;
ad932b15
YW		 1220 int r;
1221
5a1860f7 1222 assert(link);
572b21d9 1223
4faca0a3 1224 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1225 return 0;
1226
9aa2585e
YW		 1227 r = netdev_get(link->manager, link->ifname, &netdev);
1228 if (r < 0 && r != -ENOENT)
1229 return r;
1230
170e88c8 1231 r = link_get_network(link, &network);
cb71e9c6 1232 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1233 return r;
1234
fb961119
YW		 1235 if (link->state != LINK_STATE_UNMANAGED && !network)
1236 /* If link is in initialized state, then link->network is also NULL. */
1237 force = true;
1238
99b8517c 1239 if (link->network == network && !force)
ad932b15
YW		 1240 return 0;
1241
fb961119 1242 if (network) {
b993e7e7
YW		 1243 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1244
fb961119 1245 if (link->state == LINK_STATE_INITIALIZED)
b993e7e7
YW		 1246 log_link_info(link, "Configuring with %s%s%s%s.",
1247 network->filename,
1248 isempty(joined) ? "" : " (dropins: ",
1249 joined,
1250 isempty(joined) ? "" : ")");
fb961119 1251 else
b993e7e7
YW		 1252 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1253 network->filename,
1254 isempty(joined) ? "" : " (dropins: ",
1255 joined,
1256 isempty(joined) ? "" : ")");
fb961119
YW		 1257 } else
1258 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1259 "Unmanaging interface.");
ad932b15
YW		 1260
1261 /* Dropping old .network file */
2a99eed0 1262 r = link_stop_engines(link, false);
572b21d9 1263 if (r < 0)
ad932b15 1264 return r;
ad932b15 1265
19d9a5ad
YW		 1266 link_drop_requests(link);
1267
81db4f3d 1268 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1269 /* When a new/updated .network file is assigned, first make all configs (addresses,
1270 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1271 * link_drop_foreign_config() in link_configure().
1272 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1273 * here we need to drop the configs such as addresses, routes, and so on configured by
1274 * the previously assigned .network file. */
b4564f4e
YW		 1275 link_foreignize_config(link);
1276 else {
a0e99a37
YW		 1277 /* Remove all managed configs. Note, foreign configs are removed in later by
1278 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1279 r = link_drop_managed_config(link);
b4564f4e
YW		 1280 if (r < 0)
1281 return r;
1282 }
ad932b15 1283
3cf58ef3
YW		 1284 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1285 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1286 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1287 * map here, as it depends on .network files assigned to other links. */
1288 link_free_bound_to_list(link);
1289
ad932b15
YW		 1290 link_free_engines(link);
1291 link->network = network_unref(link->network);
1292
9aa2585e
YW		 1293 netdev_unref(link->netdev);
1294 link->netdev = netdev_ref(netdev);
1295
cb71e9c6
YW		 1296 if (!network) {
1297 link_set_state(link, LINK_STATE_UNMANAGED);
1298 return 0;
1299 }
1300
ad932b15 1301 /* Then, apply new .network file */
9092113d 1302 link->network = network_ref(network);
b156a95d 1303 link_update_operstate(link, true);
9092113d 1304 link_dirty(link);
ad932b15 1305
ad932b15 1306 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1307 link->activated = false;
ad932b15 1308
ad932b15
YW		 1309 r = link_configure(link);
1310 if (r < 0)
1311 return r;
1312
0e397560 1313 return 1;
ad932b15
YW		 1314}
1315
96f5f9ef 1316static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1317 int r;
1318
d09a179e
YW		 1319 assert(link);
1320
5a1860f7
YW		 1321 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1322 if (r <= 0)
1323 return r;
1324
7f80fa12 1325 r = link_reconfigure_impl(link, force);
d09a179e 1326 if (r < 0) {
572b21d9 1327 link_enter_failed(link);
d09a179e
YW		 1328 return 0;
1329 }
572b21d9 1330
d09a179e 1331 return r;
572b21d9
YW		 1332}
1333
5a1860f7 1334static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1335 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1336}
572b21d9 1337
5a1860f7 1338static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1339 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1340}
1341
a39a9ac8 1342int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1343 int r;
1344
1345 assert(link);
d09a179e 1346
8bceafa7 1347 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1348 * the function from being called multiple times simultaneously, refuse to reconfigure the
1349 * interface in these cases. */
8bceafa7 1350 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1351 return 0; /* 0 means no-op. */
2c0d7ed3 1352
a39a9ac8 1353 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1354 if (r < 0)
1355 return r;
1356
8bceafa7 1357 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1358}
1359
e6bf7774 1360static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1361 int r;
1362
1363 assert(link);
505f8da7
TG		 1364 assert(link->manager);
1365
faa2e64f
YW		 1366 if (link->manager->test_mode) {
1367 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1368 link_set_state(link, LINK_STATE_UNMANAGED);
1369 return 0;
1370 }
1371
40695457
YW		 1372 if (link->state == LINK_STATE_PENDING) {
1373 log_link_debug(link, "Link state is up-to-date");
1374 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1375
40695457
YW		 1376 r = link_new_bound_by_list(link);
1377 if (r < 0)
1378 return r;
0d4ad91d 1379
40695457
YW		 1380 r = link_handle_bound_by_list(link);
1381 if (r < 0)
1382 return r;
1383 }
0d4ad91d 1384
fb961119 1385 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1386}
1387
302a796f 1388static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1389 int r;
1390
5a1860f7
YW		 1391 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1392 if (r <= 0)
0b54c870 1393 return r;
572b21d9 1394
4ff296b0
YW		 1395 r = link_initialized_and_synced(link);
1396 if (r < 0)
1397 link_enter_failed(link);
5a1860f7
YW		 1398
1399 return 0;
e6bf7774
YW		 1400}
1401
3be9d62a 1402static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1403 int r;
1404
4f561e8e 1405 assert(link);
4f561e8e
TG		 1406 assert(device);
1407
160203e9
YW		 1408 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1409 * or sysattrs) may be outdated. */
8de56fb3 1410 device_unref_and_replace(link->dev, device);
4f561e8e 1411
3b1dbdf0
YW		 1412 if (link->dhcp_client) {
1413 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1414 if (r < 0)
1415 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1416 }
1417
1418 if (link->dhcp6_client) {
1419 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1420 if (r < 0)
1421 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1422 }
1423
b0ff6dea
YW		 1424 r = link_set_sr_iov_ifindices(link);
1425 if (r < 0)
1426 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1427
40695457
YW		 1428 if (link->state != LINK_STATE_PENDING)
1429 return link_reconfigure(link, /* force = */ false);
679b3605 1430
79008bdd 1431 log_link_debug(link, "udev initialized link");
4f561e8e 1432
3c9b8860
TG		 1433 /* udev has initialized the link, but we don't know if we have yet
1434 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1435 * when it returns we know that the pending NEWLINKs have already been
1436 * processed and that we are up-to-date */
4f561e8e 1437
5a1860f7 1438 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1439}
1440
0d411b7f 1441static int link_check_initialized(Link *link) {
51517f9e 1442 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1443 int r;
505f8da7 1444
0d411b7f 1445 assert(link);
505f8da7 1446
82f52245 1447 if (!udev_available())
0d411b7f 1448 return link_initialized_and_synced(link);
852a3916
YW		 1449
1450 /* udev should be around */
0ac655a6 1451 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1452 if (r < 0) {
1453 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1454 return 0;
1455 }
1456
1457 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1458 if (r < 0)
1459 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1460 if (r == 0) {
1461 /* not yet ready */
1462 log_link_debug(link, "link pending udev initialization...");
1463 return 0;
1464 }
1465
1466 r = device_is_renaming(device);
0d411b7f
YW		 1467 if (r < 0)
1468 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1469 if (r > 0) {
1470 log_link_debug(link, "Interface is being renamed, pending initialization.");
1471 return 0;
4f561e8e 1472 }
505f8da7 1473
0d411b7f 1474 return link_initialized(link, device);
a748b692
TG		 1475}
1476
1fd3ac1e 1477int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1478 int r, ifindex;
ba87a61d 1479 const char *s;
1fd3ac1e 1480 Link *link;
3be9d62a
YW		 1481
1482 assert(m);
1483 assert(device);
1484
3be9d62a 1485 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1486 if (r < 0)
1487 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1488
75255a8d
YW		 1489 r = link_get_by_index(m, ifindex, &link);
1490 if (r < 0) {
1491 /* This error is not critical, as the corresponding rtnl message may be received later. */
1492 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1493 return 0;
1494 }
1495
1496 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1497 * object here. It will be removed only when rtnetlink says so. */
1498 if (action == SD_DEVICE_REMOVE) {
1499 link->dev = sd_device_unref(link->dev);
1500 return 0;
1501 }
1502
3be9d62a 1503 r = device_is_renaming(device);
1fd3ac1e
YW		 1504 if (r < 0)
1505 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1506 if (r > 0) {
1fd3ac1e 1507 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1508 /* TODO:
1509 * What happens when a device is initialized, then soon renamed after that? When we detect
1510 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1511 return 0;
1512 }
1513
ba87a61d
YW		 1514 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1515 if (r < 0 && r != -ENOENT)
1516 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1517 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1518 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1519 link_set_state(link, LINK_STATE_UNMANAGED);
1520 return 0;
1521 }
1522
4b9a8c2b
YW		 1523 r = link_initialized(link, device);
1524 if (r < 0)
1525 link_enter_failed(link);
3be9d62a
YW		 1526
1527 return 0;
1528}
1529
9c0a72f9 1530static int link_carrier_gained(Link *link) {
6706ce2f 1531 bool force_reconfigure;
9c0a72f9
TG		 1532 int r;
1533
1534 assert(link);
1535
6706ce2f
YW		 1536 r = event_source_disable(link->carrier_lost_timer);
1537 if (r < 0)
1538 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1539
d9910948
YW		 1540 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1541 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1542 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1543 * restarted, and the correct network information will be gained.
1544 *
1545 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1546 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1547 * already assigned to the interface (in that case, the .network file does not have the SSID=
1548 * setting in the [Match] section), and the interface is already being configured. Of course,
1549 * there may exist another .network file with higher priority and a matching SSID= setting. But
1550 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1551 *
6706ce2f 1552 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1553 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1554 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1555 link->previous_ssid = mfree(link->previous_ssid);
1556
986b2514
AŠ		 1557 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1558 * profile wants to match on it with SSID= in its [Match] section.
1559 */
1560 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1561 r = link_get_wlan_interface(link);
1562 if (r < 0)
1563 return r;
1564 }
1565
081466bd
YW		 1566 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1567 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1568 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1569 r = link_reconfigure_impl(link, force_reconfigure);
1570 if (r != 0)
1571 return r;
b7ac1284 1572
aa9117c0
YW		 1573 r = link_handle_bound_by_list(link);
1574 if (r < 0)
1575 return r;
1576
600b7898
YW		 1577 if (link->iftype == ARPHRD_CAN)
1578 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1579 return 0;
600b7898 1580
b9ea3d2e 1581 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1582 r = link_acquire_dynamic_conf(link);
f0269653 1583 if (r < 0)
9c0a72f9 1584 return r;
6fc25497 1585
97108953 1586 r = link_request_static_configs(link);
6fc25497
SS		 1587 if (r < 0)
1588 return r;
9c0a72f9
TG		 1589 }
1590
aa9117c0 1591 return 0;
9c0a72f9
TG		 1592}
1593
6706ce2f
YW		 1594static int link_carrier_lost_impl(Link *link) {
1595 int r, ret = 0;
1596
1597 assert(link);
1598
1599 link->previous_ssid = mfree(link->previous_ssid);
1600
1601 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1602 return 0;
1603
1604 if (!link->network)
1605 return 0;
1606
1607 r = link_stop_engines(link, false);
1608 if (r < 0)
1609 ret = r;
1610
a0e99a37 1611 r = link_drop_managed_config(link);
6706ce2f
YW		 1612 if (r < 0 && ret >= 0)
1613 ret = r;
1614
1615 return ret;
1616}
1617
1618static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1619 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1620 int r;
1621
6706ce2f
YW		 1622 r = link_carrier_lost_impl(link);
1623 if (r < 0) {
1624 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1625 link_enter_failed(link);
1626 }
1627
1628 return 0;
1629}
1630
9c0a72f9 1631static int link_carrier_lost(Link *link) {
b7326069
YW		 1632 uint16_t dhcp_mtu;
1633 usec_t usec;
9c0a72f9
TG		 1634 int r;
1635
1636 assert(link);
1637
aa9117c0
YW		 1638 r = link_handle_bound_by_list(link);
1639 if (r < 0)
1640 return r;
93b4dab5 1641
600b7898
YW		 1642 if (link->iftype == ARPHRD_CAN)
1643 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1644 return 0;
1645
f1c22cf4
YW		 1646 if (!link->network)
1647 return 0;
1648
b7326069
YW		 1649 if (link->network->ignore_carrier_loss_set)
1650 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1651 usec = link->network->ignore_carrier_loss_usec;
1652
1653 else if (link->network->bond && link->wlan_iftype > 0)
1654 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1655 * carrier to be lost. See #19832. */
1656 usec = 3 * USEC_PER_SEC;
1657
1658 else if (link->network->dhcp_use_mtu &&
1659 link->dhcp_lease &&
1660 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1661 dhcp_mtu != link->original_mtu)
1662 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1663 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1664 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1665 usec = 5 * USEC_PER_SEC;
1666
1667 else
27438545 1668 /* Otherwise, use the implied default value. */
b7326069
YW		 1669 usec = link->network->ignore_carrier_loss_usec;
1670
1671 if (usec == USEC_INFINITY)
aa9117c0 1672 return 0;
600b7898 1673
b7326069 1674 if (usec == 0)
6706ce2f
YW		 1675 return link_carrier_lost_impl(link);
1676
1677 return event_reset_time_relative(link->manager->event,
1678 &link->carrier_lost_timer,
ba4e0427 1679 CLOCK_BOOTTIME,
b7326069 1680 usec,
6706ce2f
YW		 1681 0,
1682 link_carrier_lost_handler,
1683 link,
1684 0,
1685 "link-carrier-loss",
1686 true);
0c9ee5d5
YW		 1687}
1688
0c9ee5d5
YW		 1689static int link_admin_state_up(Link *link) {
1690 int r;
1691
1692 assert(link);
1693
1694 /* This is called every time an interface admin state changes to up;
1695 * specifically, when IFF_UP flag changes from unset to set. */
1696
1697 if (!link->network)
1698 return 0;
1699
899b0e5e 1700 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1701 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1702 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1703 }
1704
1705 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1706 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1707 r = link_set_ipv6_mtu(link);
1708 if (r < 0)
1709 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1710
1711 return 0;
1712}
1713
1714static int link_admin_state_down(Link *link) {
1715 assert(link);
1716
1717 if (!link->network)
1718 return 0;
1719
899b0e5e 1720 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1721 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1722 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1723 }
1724
1725 return 0;
1726}
1727
0c9ee5d5
YW		 1728static bool link_is_enslaved(Link *link) {
1729 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1730 return true;
1731
1f024462 1732 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1733 return true;
1734
0c9ee5d5
YW		 1735 return false;
1736}
1737
0c9ee5d5
YW		 1738void link_update_operstate(Link *link, bool also_update_master) {
1739 LinkOperationalState operstate;
1740 LinkCarrierState carrier_state;
1741 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1742 LinkOnlineState online_state;
1743 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1744 bool changed = false;
0c9ee5d5
YW		 1745
1746 assert(link);
1747
1748 if (link->kernel_operstate == IF_OPER_DORMANT)
1749 carrier_state = LINK_CARRIER_STATE_DORMANT;
1750 else if (link_has_carrier(link)) {
1751 if (link_is_enslaved(link))
1752 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1753 else
1754 carrier_state = LINK_CARRIER_STATE_CARRIER;
1755 } else if (link->flags & IFF_UP)
1756 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1757 else
1758 carrier_state = LINK_CARRIER_STATE_OFF;
1759
1760 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1761 Link *slave;
1762
1763 SET_FOREACH(slave, link->slaves) {
1764 link_update_operstate(slave, false);
1765
1766 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1767 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1768 }
1769 }
1770
60415c13 1771 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 1772
1773 /* Mapping of address and carrier state vs operational state
1774 * carrier state
1775 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1776 * ------------------------------------------------------------------------------
1777 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1778 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1779 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1780 */
1781
cf4dbd84
HH		 1782 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1783 operstate = LINK_OPERSTATE_ROUTABLE;
1784 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1785 operstate = LINK_OPERSTATE_DEGRADED;
1786 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1787 operstate = (LinkOperationalState) carrier_state;
1788 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1789 operstate = LINK_OPERSTATE_ROUTABLE;
1790 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1791 operstate = LINK_OPERSTATE_DEGRADED;
1792 else
1793 operstate = LINK_OPERSTATE_ENSLAVED;
1794
1795 /* Only determine online state for managed links with RequiredForOnline=yes */
1796 if (!link->network || !link->network->required_for_online)
1797 online_state = _LINK_ONLINE_STATE_INVALID;
1798 else if (operstate < link->network->required_operstate_for_online.min ||
1799 operstate > link->network->required_operstate_for_online.max)
1800 online_state = LINK_ONLINE_STATE_OFFLINE;
1801 else {
1802 AddressFamily required_family = link->network->required_family_for_online;
1803 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1804 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1805
1806 /* The operational state is within the range required for online.
1807 * If a particular address family is also required, we might revert
1808 * to offline in the blocks below. */
1809 online_state = LINK_ONLINE_STATE_ONLINE;
1810
1811 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1812 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1813 online_state = LINK_ONLINE_STATE_OFFLINE;
1814 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1815 online_state = LINK_ONLINE_STATE_OFFLINE;
1816 }
1817
1818 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1819 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1820 online_state = LINK_ONLINE_STATE_OFFLINE;
1821 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1822 online_state = LINK_ONLINE_STATE_OFFLINE;
1823 }
1824 }
1825
1826 if (link->carrier_state != carrier_state) {
1827 link->carrier_state = carrier_state;
1828 changed = true;
1829 if (strv_extend(&p, "CarrierState") < 0)
1830 log_oom();
1831 }
1832
1833 if (link->address_state != address_state) {
1834 link->address_state = address_state;
1835 changed = true;
1836 if (strv_extend(&p, "AddressState") < 0)
1837 log_oom();
1838 }
0d4ad91d 1839
0c9ee5d5
YW		 1840 if (link->ipv4_address_state != ipv4_address_state) {
1841 link->ipv4_address_state = ipv4_address_state;
1842 changed = true;
1843 if (strv_extend(&p, "IPv4AddressState") < 0)
1844 log_oom();
1845 }
9c0a72f9 1846
0c9ee5d5
YW		 1847 if (link->ipv6_address_state != ipv6_address_state) {
1848 link->ipv6_address_state = ipv6_address_state;
1849 changed = true;
1850 if (strv_extend(&p, "IPv6AddressState") < 0)
1851 log_oom();
1852 }
9c0a72f9 1853
0c9ee5d5
YW		 1854 if (link->operstate != operstate) {
1855 link->operstate = operstate;
1856 changed = true;
1857 if (strv_extend(&p, "OperationalState") < 0)
1858 log_oom();
1859 }
9c0a72f9 1860
0c9ee5d5
YW		 1861 if (link->online_state != online_state) {
1862 link->online_state = online_state;
1863 changed = true;
1864 if (strv_extend(&p, "OnlineState") < 0)
1865 log_oom();
1866 }
9c0a72f9 1867
0c9ee5d5
YW		 1868 if (p)
1869 link_send_changed_strv(link, p);
1870 if (changed)
1871 link_dirty(link);
9c0a72f9 1872
0c9ee5d5
YW		 1873 if (also_update_master) {
1874 Link *master;
9c0a72f9 1875
0c9ee5d5
YW		 1876 if (link_get_master(link, &master) >= 0)
1877 link_update_operstate(master, true);
1878 }
9c0a72f9
TG		 1879}
1880
0c9ee5d5
YW		 1881#define FLAG_STRING(string, flag, old, new) \
1882 (((old ^ new) & flag) \
1883 ? ((old & flag) ? (" -" string) : (" +" string)) \
1884 : "")
1885
0d411b7f 1886static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1887 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1888 uint8_t operstate;
1889 unsigned flags;
d236718c
DS		 1890 int r;
1891
61135582 1892 assert(link);
0d411b7f 1893 assert(message);
61135582 1894
0d411b7f 1895 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1896 if (r < 0)
0d411b7f 1897 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1898
0d411b7f
YW		 1899 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1900 if (r == -ENODATA)
1901 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1902 operstate = link->kernel_operstate;
0d411b7f
YW		 1903 else if (r < 0)
1904 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1905
0d411b7f 1906 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1907 return 0;
1908
0c9ee5d5
YW		 1909 if (link->flags != flags) {
1910 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1911
0c9ee5d5
YW		 1912 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",
1913 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1914 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1915 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1916 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1917 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1918 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1919 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1920 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1921 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1922 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1923 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1924 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1925 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1926 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1927 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1928 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1929 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1930 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1931 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1932
0c9ee5d5
YW		 1933 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1934 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1935 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1936 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1937 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1938 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1939 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1940 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1941
0c9ee5d5
YW		 1942 if (unknown_flags_added)
1943 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1944
0c9ee5d5
YW		 1945 if (unknown_flags_removed)
1946 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1947 }
61135582 1948
0d411b7f
YW		 1949 link_was_admin_up = link->flags & IFF_UP;
1950 had_carrier = link_has_carrier(link);
1951
0c9ee5d5
YW		 1952 link->flags = flags;
1953 link->kernel_operstate = operstate;
36161cba 1954
0c9ee5d5 1955 link_update_operstate(link, true);
61135582 1956
0d411b7f
YW		 1957 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1958 log_link_info(link, "Link UP");
22936833 1959
0d411b7f
YW		 1960 r = link_admin_state_up(link);
1961 if (r < 0)
1962 return r;
1963 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1964 log_link_info(link, "Link DOWN");
0d4ad91d 1965
0d411b7f 1966 r = link_admin_state_down(link);
0d4ad91d
AR		 1967 if (r < 0)
1968 return r;
7619683b
TG		 1969 }
1970
0d411b7f
YW		 1971 if (!had_carrier && link_has_carrier(link)) {
1972 log_link_info(link, "Gained carrier");
0d4ad91d 1973
0d411b7f 1974 r = link_carrier_gained(link);
30de2b89
YW		 1975 if (r < 0)
1976 return r;
0d411b7f
YW		 1977 } else if (had_carrier && !link_has_carrier(link)) {
1978 log_link_info(link, "Lost carrier");
1979
1980 r = link_carrier_lost(link);
0b54c870
YW		 1981 if (r < 0)
1982 return r;
b8941f74
TG		 1983 }
1984
0d411b7f
YW		 1985 return 0;
1986}
afe7fd56 1987
0d411b7f
YW		 1988static int link_update_master(Link *link, sd_netlink_message *message) {
1989 int master_ifindex, r;
7465dd22 1990
0d411b7f
YW		 1991 assert(link);
1992 assert(message);
69629de9 1993
0d411b7f
YW		 1994 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1995 if (r == -ENODATA)
1996 return 0;
1997 if (r < 0)
1998 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1999
571bf1aa
YW		 2000 if (master_ifindex == link->ifindex)
2001 master_ifindex = 0;
2002
0d411b7f
YW		 2003 if (master_ifindex == link->master_ifindex)
2004 return 0;
807667f7 2005
0d411b7f 2006 if (link->master_ifindex == 0)
8458ca26 2007 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 2008 else if (master_ifindex == 0)
8458ca26 2009 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 2010 else
e2341b6b
DT		 2011 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2012 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2013
0d411b7f 2014 link_drop_from_master(link);
807667f7 2015
0d411b7f 2016 link->master_ifindex = master_ifindex;
413708d1 2017
0d411b7f
YW		 2018 r = link_append_to_master(link);
2019 if (r < 0)
2020 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2021
0d411b7f
YW		 2022 return 0;
2023}
807667f7 2024
e1658632
YW		 2025static int link_update_driver(Link *link, sd_netlink_message *message) {
2026 int r;
2027
2028 assert(link);
2029 assert(link->manager);
2030 assert(message);
2031
2032 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2033 if (link->ethtool_driver_read)
e1658632
YW		 2034 return 0;
2035
2036 /* When udevd is running, read the driver after the interface is initialized by udevd.
2037 * Otherwise, ethtool may not work correctly. See issue #22538.
2038 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2039 if (udev_available() && !link->dev)
e1658632
YW		 2040 return 0;
2041
6625c39e
YW		 2042 link->ethtool_driver_read = true;
2043
e1658632
YW		 2044 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2045 if (r < 0) {
2046 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2047 return 0;
2048 }
2049
2050 log_link_debug(link, "Found driver: %s", strna(link->driver));
2051
2052 if (streq_ptr(link->driver, "dsa")) {
2053 uint32_t dsa_master_ifindex = 0;
2054
2055 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2056 if (r < 0 && r != -ENODATA)
2057 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2058
2059 if (dsa_master_ifindex > INT_MAX) {
2060 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2061 dsa_master_ifindex);
2062 dsa_master_ifindex = 0;
2063 }
2064
2065 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2066 }
2067
40695457 2068 return 1; /* needs reconfigure */
e1658632
YW		 2069}
2070
6625c39e 2071static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2072 int r;
2073
2074 assert(link);
2075 assert(link->manager);
2076 assert(message);
2077
6625c39e 2078 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2079 return 0;
2080
2081 /* When udevd is running, read the permanent hardware address after the interface is
2082 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2083 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2084 if (udev_available() && !link->dev)
2085 return 0;
2086
2087 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2088 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2089 if (r == -ENODATA)
2090 return 0;
2091 if (r < 0)
2092 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2093
2094 link->ethtool_permanent_hw_addr_read = true;
2095
2096 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2097 if (r < 0)
2098 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2099
2100 return 0;
2101}
2102
2103static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2104 int r;
2105
2106 assert(link);
2107 assert(link->manager);
2108 assert(message);
2109
2110 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2111 return 0;
2112
2113 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2114 if (r < 0) {
2115 if (r != -ENODATA)
2116 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2117
6625c39e
YW		 2118 /* Fallback to ethtool for older kernels. */
2119 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2120 if (r < 0)
2121 return r;
e1658632
YW		 2122 }
2123
2124 if (link->permanent_hw_addr.length > 0)
2125 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2126
40695457 2127 return 1; /* needs reconfigure */
e1658632
YW		 2128}
2129
0d411b7f 2130static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2131 struct hw_addr_data addr;
0d411b7f 2132 int r;
d93d655c 2133
0d411b7f
YW		 2134 assert(link);
2135 assert(message);
dfc58b47 2136
0d411b7f
YW		 2137 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2138 if (r < 0 && r != -ENODATA)
2139 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2140
e2bacccd 2141 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2142 if (r == -ENODATA)
2143 return 0;
2144 if (r < 0)
fe321d45 2145 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2146
e2bacccd 2147 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2148 return 0;
a61bb41c 2149
de0f1579 2150 if (link->hw_addr.length == 0)
e2bacccd 2151 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2152 else {
e2341b6b
DT		 2153 log_link_debug(link, "Hardware address is changed: %s %s %s",
2154 HW_ADDR_TO_STR(&link->hw_addr),
2155 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2156 HW_ADDR_TO_STR(&addr));
0d411b7f 2157
e74f1d07 2158 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2159 }
2160
e2bacccd
YW		 2161 link->hw_addr = addr;
2162
fe321d45
YW		 2163 if (!hw_addr_is_null(&link->hw_addr)) {
2164 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2165 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2166 /* bonding master and its slaves have the same hardware address. */
2167 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2168 if (r < 0)
2169 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2170 }
0d411b7f 2171
0a14f83a 2172 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2173 if (r < 0)
2174 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2175
0d411b7f 2176 r = ipv4ll_update_mac(link);
a61bb41c 2177 if (r < 0)
0d411b7f 2178 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2179
0d411b7f
YW		 2180 r = dhcp4_update_mac(link);
2181 if (r < 0)
2182 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2183
0d411b7f
YW		 2184 r = dhcp6_update_mac(link);
2185 if (r < 0)
2186 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2187
2188 r = radv_update_mac(link);
2189 if (r < 0)
2190 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2191
3be64aa4 2192 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2193 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2194 if (r < 0)
0d411b7f
YW		 2195 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2196 }
d236718c 2197
35778343
YW		 2198 if (link->lldp_rx) {
2199 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2200 if (r < 0)
c01b9b87
YW		 2201 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2202 }
2203
2204 if (link->lldp_tx) {
2205 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2206 if (r < 0)
2207 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2208 }
2209
40695457 2210 return 1; /* needs reconfigure */
0d411b7f 2211}
a61bb41c 2212
0d411b7f 2213static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2214 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2215 int r;
a61bb41c 2216
0d411b7f
YW		 2217 assert(link);
2218 assert(message);
2219
2220 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2221 if (r == -ENODATA)
2222 return 0;
2223 if (r < 0)
2224 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2225 if (mtu == 0)
2226 return 0;
0d411b7f 2227
717ba5fc
YW		 2228 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2229 if (r < 0 && r != -ENODATA)
2230 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2231
2232 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2233 if (r < 0 && r != -ENODATA)
2234 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2235
717ba5fc
YW		 2236 if (max_mtu == 0)
2237 max_mtu = UINT32_MAX;
2238
2239 link->min_mtu = min_mtu;
2240 link->max_mtu = max_mtu;
2241
0d411b7f
YW		 2242 if (link->original_mtu == 0) {
2243 link->original_mtu = mtu;
717ba5fc
YW		 2244 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2245 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2246 }
2247
717ba5fc
YW		 2248 if (link->mtu == mtu)
2249 return 0;
2250
b5d0fd1e 2251 if (link->mtu != 0)
e2341b6b
DT		 2252 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2253 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2254 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2255
2256 link->mtu = mtu;
2257
2258 if (link->dhcp_client) {
2259 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2260 if (r < 0)
0d411b7f
YW		 2261 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2262 }
a61bb41c 2263
0d411b7f
YW		 2264 if (link->radv) {
2265 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2266 if (r < 0)
0d411b7f 2267 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2268 }
2269
2270 return 0;
dd3efc09 2271}
fe8db0c5 2272
0d411b7f
YW		 2273static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2274 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2275 int r;
2276
2277 assert(link);
2278 assert(message);
2279
2280 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2281 if (r == -ENODATA)
2368ff81 2282 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2283 * interface has no alternative name. */
2284 return 0;
2285 if (r < 0)
0d411b7f
YW		 2286 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2287
1b345c1e
YW		 2288 if (strv_equal(altnames, link->alternative_names))
2289 return 0;
2290
0d411b7f
YW		 2291 STRV_FOREACH(n, link->alternative_names)
2292 hashmap_remove(link->manager->links_by_name, *n);
2293
2294 strv_free_and_replace(link->alternative_names, altnames);
2295
2296 STRV_FOREACH(n, link->alternative_names) {
2297 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2298 if (r < 0)
2299 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2300 }
2301
40695457 2302 return 1; /* needs reconfigure */
0d411b7f
YW		 2303}
2304
2305static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2306 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2307 const char *ifname;
2308 int r;
2309
2310 assert(link);
2311 assert(message);
2312
2313 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2314 if (r == -ENODATA)
7802194a 2315 /* Hmm?? But ok. */
0d411b7f
YW		 2316 return 0;
2317 if (r < 0)
2318 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2319
2320 if (streq(ifname, link->ifname))
2321 return 0;
2322
01afd0f7
YW		 2323 r = format_ifname(link->ifindex, ifname_from_index);
2324 if (r < 0)
2325 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2326
2327 if (!streq(ifname, ifname_from_index)) {
2328 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2329 "with the name currently configured on the actual interface '%s'. Ignoring.",
2330 ifname, ifname_from_index);
2331 return 0;
2332 }
2333
0d411b7f
YW		 2334 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2335
2336 hashmap_remove(link->manager->links_by_name, link->ifname);
2337
2338 r = free_and_strdup(&link->ifname, ifname);
2339 if (r < 0)
2340 return log_oom_debug();
2341
2342 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2343 if (r < 0)
2344 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2345
54d1fdb2
YW		 2346 if (link->dhcp_client) {
2347 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2348 if (r < 0)
2349 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2350 }
2351
2352 if (link->dhcp6_client) {
2353 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2354 if (r < 0)
2355 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2356 }
2357
2358 if (link->ndisc) {
2359 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2360 if (r < 0)
2361 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2362 }
2363
2364 if (link->dhcp_server) {
2365 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2366 if (r < 0)
2367 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2368 }
2369
2370 if (link->radv) {
2371 r = sd_radv_set_ifname(link->radv, link->ifname);
2372 if (r < 0)
2373 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2374 }
2375
35778343
YW		 2376 if (link->lldp_rx) {
2377 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2378 if (r < 0)
c01b9b87
YW		 2379 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2380 }
2381
2382 if (link->lldp_tx) {
2383 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2384 if (r < 0)
2385 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2386 }
2387
2388 if (link->ipv4ll) {
2389 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2390 if (r < 0)
2391 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2392 }
2393
86173383
YW		 2394 r = ipv4acd_set_ifname(link);
2395 if (r < 0)
2396 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2397
40695457 2398 return 1; /* needs reconfigure */
0d411b7f
YW		 2399}
2400
2401static int link_update(Link *link, sd_netlink_message *message) {
40695457 2402 bool needs_reconfigure = false;
0d411b7f
YW		 2403 int r;
2404
2405 assert(link);
2406 assert(message);
2407
2408 r = link_update_name(link, message);
2409 if (r < 0)
2410 return r;
40695457 2411 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2412
2413 r = link_update_alternative_names(link, message);
2414 if (r < 0)
2415 return r;
40695457 2416 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2417
2418 r = link_update_mtu(link, message);
2419 if (r < 0)
2420 return r;
2421
e1658632
YW		 2422 r = link_update_driver(link, message);
2423 if (r < 0)
2424 return r;
40695457 2425 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2426
2427 r = link_update_permanent_hardware_address(link, message);
2428 if (r < 0)
2429 return r;
40695457 2430 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2431
0d411b7f
YW		 2432 r = link_update_hardware_address(link, message);
2433 if (r < 0)
2434 return r;
40695457 2435 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2436
2437 r = link_update_master(link, message);
2438 if (r < 0)
2439 return r;
2440
7d0d832d
YW		 2441 r = link_update_ipv6ll_addrgen_mode(link, message);
2442 if (r < 0)
2443 return r;
2444
40695457
YW		 2445 r = link_update_flags(link, message);
2446 if (r < 0)
2447 return r;
2448
11cee6ef
YW		 2449 r = link_update_bridge_vlan(link, message);
2450 if (r < 0)
2451 return r;
2452
40695457 2453 return needs_reconfigure;
0d411b7f
YW		 2454}
2455
0c9ee5d5
YW		 2456static Link *link_drop_or_unref(Link *link) {
2457 if (!link)
2458 return NULL;
2459 if (!link->manager)
2460 return link_unref(link);
2461 return link_drop(link);
2462}
2463
2464DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2465
2466static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2467 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2468 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2469 unsigned short iftype;
2470 int r, ifindex;
0c9ee5d5
YW		 2471
2472 assert(manager);
2473 assert(message);
2474 assert(ret);
2475
0c9ee5d5
YW		 2476 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2477 if (r < 0)
0d411b7f 2478 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2479 else if (ifindex <= 0)
0d411b7f 2480 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2481
2482 r = sd_rtnl_message_link_get_type(message, &iftype);
2483 if (r < 0)
0d411b7f 2484 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2485
2486 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2487 if (r < 0)
0d411b7f 2488 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2489
2490 /* check for link kind */
2491 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2492 if (r >= 0) {
0d411b7f
YW		 2493 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2494 if (r < 0 && r != -ENODATA)
2495 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2496 r = sd_netlink_message_exit_container(message);
2497 if (r < 0)
0d411b7f 2498 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2499 }
2500
4c78dc17
YW		 2501 if (!manager->test_mode) {
2502 /* Do not update state files when running in test mode. */
2503 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2504 return log_oom_debug();
0d411b7f 2505
4c78dc17
YW		 2506 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2507 return log_oom_debug();
0d411b7f 2508
4c78dc17
YW		 2509 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2510 return log_oom_debug();
2511 }
0d411b7f 2512
0c9ee5d5
YW		 2513 link = new(Link, 1);
2514 if (!link)
2515 return -ENOMEM;
2516
2517 *link = (Link) {
2518 .n_ref = 1,
2519 .state = LINK_STATE_PENDING,
2520 .online_state = _LINK_ONLINE_STATE_INVALID,
2521 .ifindex = ifindex,
2522 .iftype = iftype,
2523 .ifname = TAKE_PTR(ifname),
2524 .kind = TAKE_PTR(kind),
2525
11cee6ef
YW		 2526 .bridge_vlan_pvid = UINT16_MAX,
2527
7d0d832d
YW		 2528 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2529
0d411b7f
YW		 2530 .state_file = TAKE_PTR(state_file),
2531 .lease_file = TAKE_PTR(lease_file),
2532 .lldp_file = TAKE_PTR(lldp_file),
2533
0c9ee5d5
YW		 2534 .n_dns = UINT_MAX,
2535 .dns_default_route = -1,
2536 .llmnr = _RESOLVE_SUPPORT_INVALID,
2537 .mdns = _RESOLVE_SUPPORT_INVALID,
2538 .dnssec_mode = _DNSSEC_MODE_INVALID,
2539 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2540 };
2541
6eab614d 2542 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2543 if (r < 0)
0d411b7f 2544 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2545
2546 link->manager = manager;
2547
0d411b7f 2548 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2549 if (r < 0)
0d411b7f 2550 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2551
8a77e245
YW		 2552 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2553 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2554
9c5b8d46
AŠ		 2555 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2556 * message arrived too early. Request the wireless link information again.
2557 */
2558 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2559 r = link_get_wlan_interface(link);
2560 if (r < 0)
2561 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2562 }
2563
0c9ee5d5 2564 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2565 return 0;
2566}
2567
0d411b7f 2568int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2569 Link *link = NULL;
2570 NetDev *netdev = NULL;
2571 uint16_t type;
2572 const char *name;
2573 int r, ifindex;
2574
2575 assert(rtnl);
2576 assert(message);
0d411b7f 2577 assert(manager);
3be9d62a
YW		 2578
2579 if (sd_netlink_message_is_error(message)) {
2580 r = sd_netlink_message_get_errno(message);
2581 if (r < 0)
2582 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2583
2584 return 0;
2585 }
2586
2587 r = sd_netlink_message_get_type(message, &type);
2588 if (r < 0) {
2589 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2590 return 0;
2591 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2592 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2593 return 0;
2594 }
2595
2596 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2597 if (r < 0) {
2598 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2599 return 0;
2600 } else if (ifindex <= 0) {
2601 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2602 return 0;
2603 }
2604
2605 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2606 if (r < 0) {
2607 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2608 return 0;
2609 }
2610
6eab614d 2611 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2612 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2613
2614 switch (type) {
2615 case RTM_NEWLINK:
0d411b7f
YW		 2616 if (netdev) {
2617 /* netdev exists, so make sure the ifindex matches */
2618 r = netdev_set_ifindex(netdev, message);
2619 if (r < 0) {
66141164 2620 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2621 return 0;
2622 }
2623 }
2624
3be9d62a
YW		 2625 if (!link) {
2626 /* link is new, so add it */
0d411b7f 2627 r = link_new(manager, message, &link);
3be9d62a 2628 if (r < 0) {
0d411b7f 2629 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2630 return 0;
2631 }
3be9d62a 2632
0d411b7f 2633 r = link_update(link, message);
3be9d62a 2634 if (r < 0) {
66141164 2635 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2636 link_enter_failed(link);
3be9d62a
YW		 2637 return 0;
2638 }
3be9d62a 2639
0d411b7f
YW		 2640 r = link_check_initialized(link);
2641 if (r < 0) {
66141164 2642 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2643 link_enter_failed(link);
2644 return 0;
2645 }
2646 } else {
2647 r = link_update(link, message);
2648 if (r < 0) {
66141164 2649 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2650 link_enter_failed(link);
2651 return 0;
2652 }
40695457
YW		 2653 if (r > 0) {
2654 r = link_reconfigure_impl(link, /* force = */ false);
2655 if (r < 0) {
2656 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2657 link_enter_failed(link);
2658 return 0;
2659 }
2660 }
3be9d62a 2661 }
3be9d62a
YW		 2662 break;
2663
2664 case RTM_DELLINK:
2665 link_drop(link);
2666 netdev_drop(netdev);
3be9d62a
YW		 2667 break;
2668
2669 default:
04499a70 2670 assert_not_reached();
3be9d62a
YW		 2671 }
2672
2673 return 1;
2674}
2675
79c6e114
YW		 2676int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2677 uint16_t message_type;
2678 int r;
2679
2680 assert(m);
2681 assert(link);
2682 assert(error_msg);
2683
2684 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2685 return 0;
2686
2687 r = sd_netlink_message_get_errno(m);
2688 if (r < 0) {
2689 log_link_message_warning_errno(link, m, r, error_msg);
2690 link_enter_failed(link);
2691 return 0;
2692 }
2693
2694 r = sd_netlink_message_get_type(m, &message_type);
2695 if (r < 0) {
2696 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2697 return 0;
2698 }
2699 if (message_type != RTM_NEWLINK) {
2700 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2701 return 0;
2702 }
2703
2704 r = link_update(link, m);
2705 if (r < 0) {
2706 link_enter_failed(link);
2707 return 0;
2708 }
2709
2710 return 1;
2711}
2712
2713int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2714 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2715 int r;
2716
2717 assert(link);
2718 assert(link->manager);
2719 assert(link->manager->rtnl);
2720 assert(callback);
2721
2722 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2723 if (r < 0)
2724 return r;
2725
2726 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2727 link_netlink_destroy_callback, link);
2728 if (r < 0)
2729 return r;
2730
2731 link_ref(link);
2732 return 0;
2733}
2734
fe8db0c5 2735static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2736 [LINK_STATE_PENDING] = "pending",
bd08ce56 2737 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2738 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2739 [LINK_STATE_CONFIGURED] = "configured",
2740 [LINK_STATE_UNMANAGED] = "unmanaged",
2741 [LINK_STATE_FAILED] = "failed",
2742 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2743};
2744
2745DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2746
2747int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2748 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2749 static const char* map[] = {
2750 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2751 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2752 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2753 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2754 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2755 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2756 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2757 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2758 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2759 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2760 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2761 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2762 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2763 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2764 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2765 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2766 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2767 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2768 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2769 };
2770
2771 assert(ret);
2772
2773 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2774 if (FLAGS_SET(flags, 1 << i) && map[i])
2775 if (!strextend_with_separator(&str, ",", map[i]))
2776 return -ENOMEM;
7ae55b78
YW		 2777
2778 *ret = TAKE_PTR(str);
2779 return 0;
2780}
2781
2782static const char * const kernel_operstate_table[] = {
2783 [IF_OPER_UNKNOWN] = "unknown",
2784 [IF_OPER_NOTPRESENT] = "not-present",
2785 [IF_OPER_DOWN] = "down",
2786 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2787 [IF_OPER_TESTING] = "testing",
2788 [IF_OPER_DORMANT] = "dormant",
2789 [IF_OPER_UP] = "up",
2790};
2791
2792DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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