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dhcp: introduce sd_dhcp_lease_get_timestamp()
[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"
27dfc982 20#include "dhcp-identifier.h"
bd91b83e 21#include "dhcp-lease-internal.h"
686d13b9 22#include "env-file.h"
4bb7cc82 23#include "ethtool-util.h"
6706ce2f 24#include "event-util.h"
3ffd4af2 25#include "fd-util.h"
cf1d700d 26#include "fileio.h"
176b8be1 27#include "format-util.h"
af664001 28#include "fs-util.h"
e2341b6b 29#include "glyph-util.h"
3ae6b3bf 30#include "logarithm.h"
ef118d00 31#include "missing_network.h"
cf1d700d 32#include "netlink-util.h"
c6f7c917 33#include "network-internal.h"
fb486c90 34#include "networkd-address-label.h"
093e3533 35#include "networkd-address.h"
9671ae9d 36#include "networkd-bridge-fdb.h"
ff9e0783 37#include "networkd-bridge-mdb.h"
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"
3b6a3bde 55#include "networkd-route.h"
bce67bbe 56#include "networkd-routing-policy-rule.h"
0fa8ee6c 57#include "networkd-setlink.h"
19d9a5ad 58#include "networkd-sriov.h"
3b5a4fc6 59#include "networkd-state-file.h"
19d9a5ad 60#include "networkd-sysctl.h"
986b2514 61#include "networkd-wifi.h"
cf1d700d
TG		 62#include "set.h"
63#include "socket-util.h"
15a5e950 64#include "stdio-util.h"
8b43440b 65#include "string-table.h"
51517f9e 66#include "strv.h"
34658df2 67#include "tc.h"
e4de7287 68#include "tmpfile-util.h"
af7a86b8 69#include "tuntap.h"
299ad32d 70#include "udev-util.h"
737f1405 71#include "vrf.h"
fc2f9534 72
5e0534f1 73bool link_ipv6_enabled(Link *link) {
439689c6
SS		 74 assert(link);
75
76 if (!socket_ipv6_is_supported())
77 return false;
78
5fb5fae9 79 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 80 return false;
81
5fb5fae9
YW		 82 if (!link->network)
83 return false;
84
85 if (link->network->bond)
af9ba57a
YW		 86 return false;
87
bd7e0a3f 88 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 89 return true;
90
91 if (network_has_static_ipv6_configurations(link->network))
92 return true;
93
94 return false;
439689c6
SS		 95}
96
e33232d4 97static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 98 assert(link);
99
d8d4db58
YW		 100 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
101 return false;
102
2fd3908b
YW		 103 if (!link->network)
104 return allow_unmanaged;
7191a57a 105
baa95d22
YW		 106 if (!link->network->configure_without_carrier) {
107 if (link->set_flags_messages > 0)
108 return false;
109
110 if (!link_has_carrier(link))
111 return false;
112 }
7191a57a 113
0fa8ee6c
YW		 114 if (link->set_link_messages > 0)
115 return false;
116
112a0972
YW		 117 if (!link->activated)
118 return false;
112a0972 119
7191a57a
YW		 120 return true;
121}
122
e33232d4
YW		 123bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
124 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
125}
126
15761549
YW		 127void link_ntp_settings_clear(Link *link) {
128 link->ntp = strv_free(link->ntp);
129}
130
131void link_dns_settings_clear(Link *link) {
f5fbe71d 132 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 133 for (unsigned i = 0; i < link->n_dns; i++)
134 in_addr_full_free(link->dns[i]);
15761549 135 link->dns = mfree(link->dns);
f5fbe71d 136 link->n_dns = UINT_MAX;
15761549 137
6e4571f0
YW		 138 link->search_domains = ordered_set_free(link->search_domains);
139 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 140
141 link->dns_default_route = -1;
142 link->llmnr = _RESOLVE_SUPPORT_INVALID;
143 link->mdns = _RESOLVE_SUPPORT_INVALID;
144 link->dnssec_mode = _DNSSEC_MODE_INVALID;
145 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
146
147 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
148}
149
1a6bb31f
YW		 150static void link_free_engines(Link *link) {
151 if (!link)
152 return;
153
154 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 155
1a6bb31f
YW		 156 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
157 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 158 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 159
35778343 160 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 161 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 162
5385e5f9
YW		 163 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
164
1a6bb31f 165 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 166
1a6bb31f 167 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 168 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 169
1a6bb31f 170 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 171 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
172 ndisc_flush(link);
173
1a6bb31f
YW		 174 link->radv = sd_radv_unref(link->radv);
175}
176
8301aa0b 177static Link *link_free(Link *link) {
8301aa0b 178 assert(link);
f579559b 179
15761549
YW		 180 link_ntp_settings_clear(link);
181 link_dns_settings_clear(link);
182
8eec0b9d 183 link->routes = set_free(link->routes);
8eec0b9d 184 link->nexthops = set_free(link->nexthops);
8eec0b9d 185 link->neighbors = set_free(link->neighbors);
8eec0b9d 186 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 187 link->qdiscs = set_free(link->qdiscs);
188 link->tclasses = set_free(link->tclasses);
adda1ed9 189
a27588d4 190 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 191
1a6bb31f 192 link_free_engines(link);
49699bac 193
b0ff6dea 194 set_free(link->sr_iov_virt_port_ifindices);
c166a070 195 free(link->ifname);
572b21d9 196 strv_free(link->alternative_names);
ceac4078 197 free(link->kind);
8d968fdd 198 free(link->ssid);
6706ce2f 199 free(link->previous_ssid);
c643bda5 200 free(link->driver);
6cad256d 201
a34e58d4
YW		 202 unlink_and_free(link->lease_file);
203 unlink_and_free(link->lldp_file);
204 unlink_and_free(link->state_file);
c166a070 205
8de56fb3 206 sd_device_unref(link->dev);
9aa2585e 207 netdev_unref(link->netdev);
b5db00e5 208
0d4ad91d 209 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 210 hashmap_free(link->bound_by_links);
211
5f707e12 212 set_free_with_destructor(link->slaves, link_unref);
033295c1 213
c9c908a6
YW		 214 network_unref(link->network);
215
6706ce2f
YW		 216 sd_event_source_disable_unref(link->carrier_lost_timer);
217
8301aa0b 218 return mfree(link);
14b746f7
TG		 219}
220
8301aa0b 221DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 222
6eab614d 223int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 224 Link *link;
11a7f229
TG		 225
226 assert(m);
e856ed00 227 assert(ifindex > 0);
11a7f229 228
6eab614d 229 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 230 if (!link)
231 return -ENODEV;
232
0b54c870
YW		 233 if (ret)
234 *ret = link;
235 return 0;
236}
237
238int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
239 Link *link;
240
241 assert(m);
242 assert(ifname);
11a7f229 243
0b54c870
YW		 244 link = hashmap_get(m->links_by_name, ifname);
245 if (!link)
246 return -ENODEV;
247
248 if (ret)
249 *ret = link;
11a7f229
TG		 250 return 0;
251}
252
fe321d45
YW		 253int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
254 Link *link;
255
256 assert(m);
257 assert(hw_addr);
258
259 link = hashmap_get(m->links_by_hw_addr, hw_addr);
260 if (!link)
261 return -ENODEV;
262
263 if (ret)
264 *ret = link;
265 return 0;
266}
267
81357285
YW		 268int link_get_master(Link *link, Link **ret) {
269 assert(link);
270 assert(link->manager);
271 assert(ret);
272
273 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
274 return -ENODEV;
275
6eab614d 276 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 277}
278
af9ba57a 279void link_set_state(Link *link, LinkState state) {
e331e246
TG		 280 assert(link);
281
282 if (link->state == state)
283 return;
284
0beb9542
YW		 285 log_link_debug(link, "State changed: %s -> %s",
286 link_state_to_string(link->state),
287 link_state_to_string(state));
288
e331e246
TG		 289 link->state = state;
290
291 link_send_changed(link, "AdministrativeState", NULL);
9092113d 292 link_dirty(link);
e331e246
TG		 293}
294
2a99eed0 295int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 296 int r = 0, k;
297
298 assert(link);
299 assert(link->manager);
300 assert(link->manager->event);
301
80060352
ZJS		 302 bool keep_dhcp = may_keep_dhcp &&
303 link->network &&
76a86ffd 304 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 305 (link->manager->restarting ||
306 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
307
84add3cd 308 if (!keep_dhcp) {
111bb8f9 309 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 310 if (k < 0)
36c7d709 311 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 312 }
313
2a99eed0
YW		 314 k = sd_dhcp_server_stop(link->dhcp_server);
315 if (k < 0)
316 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
317
35778343 318 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 319 if (k < 0)
c01b9b87
YW		 320 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
321
322 k = sd_lldp_tx_stop(link->lldp_tx);
323 if (k < 0)
324 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 325
84add3cd
YW		 326 k = sd_ipv4ll_stop(link->ipv4ll);
327 if (k < 0)
328 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 329
76a86ffd 330 k = ipv4acd_stop(link);
2488e4d9
YW		 331 if (k < 0)
332 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 333
84add3cd
YW		 334 k = sd_dhcp6_client_stop(link->dhcp6_client);
335 if (k < 0)
336 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 337
a27588d4 338 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 339 if (k < 0)
340 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 341
77302468 342 k = ndisc_stop(link);
84add3cd
YW		 343 if (k < 0)
344 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 345
259c65f3
YW		 346 ndisc_flush(link);
347
84add3cd
YW		 348 k = sd_radv_stop(link->radv);
349 if (k < 0)
350 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 351
111bb8f9
TG		 352 return r;
353}
354
b22d8a00 355void link_enter_failed(Link *link) {
ef1ba606 356 assert(link);
f882c247 357
370e9930 358 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 359 return;
360
6a7a4e4d 361 log_link_warning(link, "Failed");
449f7554 362
e331e246 363 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 364
2a99eed0 365 (void) link_stop_engines(link, false);
f882c247
TG		 366}
367
6accfd31
DA		 368void link_check_ready(Link *link) {
369 Address *a;
6accfd31
DA		 370
371 assert(link);
372
5f58af25
YW		 373 if (link->state == LINK_STATE_CONFIGURED)
374 return;
375
d19b9939
YW		 376 if (link->state != LINK_STATE_CONFIGURING)
377 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 378
379 if (!link->network)
a7f07cbe 380 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 381
7558f9e7
YW		 382 if (!link->tc_configured)
383 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 384
a7f07cbe
YW		 385 if (link->set_link_messages > 0)
386 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
387
388 if (!link->activated)
389 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
390
7558f9e7
YW		 391 if (link->iftype == ARPHRD_CAN) {
392 /* let's shortcut things for CAN which doesn't need most of checks below. */
393 link_set_state(link, LINK_STATE_CONFIGURED);
394 return;
395 }
396
879377ca
YW		 397 if (!link->stacked_netdevs_created)
398 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
399
76c5a0f2 400 if (!link->static_addresses_configured)
d19b9939 401 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 402
354bc760
YW		 403 if (!link->static_address_labels_configured)
404 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
405
e5b35bf6
YW		 406 if (!link->static_bridge_fdb_configured)
407 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
408
ff9e0783
YW		 409 if (!link->static_bridge_mdb_configured)
410 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
411
fdeba3f5
YW		 412 if (!link->static_ipv6_proxy_ndp_configured)
413 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
414
40ca350e
YW		 415 if (!link->static_neighbors_configured)
416 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
417
d19b9939
YW		 418 if (!link->static_nexthops_configured)
419 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 420
76c5a0f2
YW		 421 if (!link->static_routes_configured)
422 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
423
0e5ef6be 424 if (!link->static_routing_policy_rules_configured)
d19b9939 425 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 426
d19b9939
YW		 427 if (!link->sr_iov_configured)
428 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 429
4bcb8625
YW		 430 /* IPv6LL is assigned after the link gains its carrier. */
431 if (!link->network->configure_without_carrier &&
432 link_ipv6ll_enabled(link) &&
433 !in6_addr_is_set(&link->ipv6ll_address))
434 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
435
9e7d91ed
YW		 436 /* All static addresses must be ready. */
437 bool has_static_address = false;
438 SET_FOREACH(a, link->addresses) {
439 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
440 continue;
441 if (!address_is_ready(a))
442 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
443 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
444 has_static_address = true;
445 }
446
447 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
448 if (has_static_address)
449 goto ready;
450
5f950e56
YW		 451 /* If no dynamic addressing protocol enabled, assume the interface is ready.
452 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
453 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
454 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
455 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
456 goto ready;
457
458 bool ipv4ll_ready =
459 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
460 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
461 bool dhcp4_ready =
462 link_dhcp4_enabled(link) && link->dhcp4_configured &&
463 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
464 bool dhcp6_ready =
465 link_dhcp6_enabled(link) && link->dhcp6_configured &&
466 (!link->network->dhcp6_use_address ||
467 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
468 bool dhcp_pd_ready =
469 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
470 (!link->network->dhcp_pd_assign ||
471 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
472 bool ndisc_ready =
473 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
474 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
475 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
476
195b83ed
YW		 477 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
478 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
479 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
480 link->dhcp_lease && dhcp4_lease_has_pd_prefix(link->dhcp_lease)) {
481 if (!dhcp4_ready)
482 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
483 if (!dhcp_pd_ready)
484 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
485 }
486
487 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
488 link->dhcp6_lease && dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
489 if (!dhcp6_ready)
490 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
491 if (!dhcp_pd_ready)
492 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
493 }
494 }
495
5f950e56
YW		 496 /* At least one dynamic addressing protocol is finished. */
497 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
498 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
499
500 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
501 __func__,
502 yes_no(ipv4ll_ready),
503 yes_no(dhcp4_ready),
504 yes_no(dhcp6_ready),
505 yes_no(dhcp_pd_ready),
506 yes_no(ndisc_ready));
507
508ready:
29836c16 509 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 510}
511
97108953 512static int link_request_static_configs(Link *link) {
f882c247
TG		 513 int r;
514
515 assert(link);
516 assert(link->network);
f5be5601 517 assert(link->state != _LINK_STATE_INVALID);
f882c247 518
354bc760 519 r = link_request_static_addresses(link);
0e5ef6be
YW		 520 if (r < 0)
521 return r;
522
354bc760 523 r = link_request_static_address_labels(link);
f3ef324d
YW		 524 if (r < 0)
525 return r;
e4a71bf3 526
e5b35bf6
YW		 527 r = link_request_static_bridge_fdb(link);
528 if (r < 0)
529 return r;
530
9a038aac
YW		 531 r = link_request_static_bridge_mdb(link);
532 if (r < 0)
533 return r;
534
fdeba3f5
YW		 535 r = link_request_static_ipv6_proxy_ndp_addresses(link);
536 if (r < 0)
537 return r;
538
40ca350e 539 r = link_request_static_neighbors(link);
682c65b0
YW		 540 if (r < 0)
541 return r;
bd6379ec 542
76c5a0f2 543 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 544 if (r < 0)
545 return r;
f882c247 546
76c5a0f2
YW		 547 r = link_request_static_routes(link, false);
548 if (r < 0)
549 return r;
550
551 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 552 if (r < 0)
553 return r;
d4cdbea5 554
f882c247
TG		 555 return 0;
556}
557
1187fc33
YW		 558static int link_request_stacked_netdevs(Link *link) {
559 NetDev *netdev;
e16e4b3b
DS		 560 int r;
561
562 assert(link);
563
1187fc33 564 link->stacked_netdevs_created = false;
e16e4b3b 565
1187fc33 566 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 567 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 568 if (r < 0)
569 return r;
570 }
e16e4b3b 571
bb916f35 572 if (link->create_stacked_netdev_messages == 0) {
1187fc33 573 link->stacked_netdevs_created = true;
bb916f35
YW		 574 link_check_ready(link);
575 }
e16e4b3b
DS		 576
577 return 0;
578}
579
8566df79 580static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 581 int r;
582
583 assert(link);
584
0f96a823
YW		 585 r = radv_start(link);
586 if (r < 0)
587 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 588
294f129b
YW		 589 r = ndisc_start(link);
590 if (r < 0)
591 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 592
294f129b
YW		 593 r = dhcp6_start(link);
594 if (r < 0)
595 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 596
e7ab854c
TG		 597 return 0;
598}
599
8566df79 600static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 601 int r;
602
603 assert(link);
ff254138
TG		 604 assert(link->manager);
605 assert(link->manager->event);
606
0107b769 607 if (link->dhcp_client) {
294f129b 608 r = dhcp4_start(link);
0107b769 609 if (r < 0)
294f129b 610 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 611
ccffa166 612 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 613
ccffa166 614 } else if (link->ipv4ll) {
59c27231
AK		 615 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
616 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
617 if (r < 0)
618 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
619 }
620
5c1d3fc9 621 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 622 if (r < 0)
623 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 624
625 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 626 }
627
ab486ef4
YW		 628 if (link->dhcp_server) {
629 r = sd_dhcp_server_start(link->dhcp_server);
630 if (r < 0)
631 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
632 }
633
76a86ffd
YW		 634 r = ipv4acd_start(link);
635 if (r < 0)
636 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
637
6fc25497
SS		 638 return 0;
639}
640
8566df79 641static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 642 int r;
643
644 assert(link);
0f96a823 645 assert(link->network);
6fc25497 646
8566df79 647 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 648 if (r < 0)
649 return r;
650
94876904 651 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 652 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 653 if (r < 0)
654 return r;
655 }
656
a27588d4 657 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 658 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
659 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
660 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
661 * below will be called in radv_start(). */
a27588d4 662 r = dhcp_request_prefix_delegation(link);
0f96a823 663 if (r < 0)
a27588d4 664 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 665 }
666
c01b9b87
YW		 667 if (link->lldp_tx) {
668 r = sd_lldp_tx_start(link->lldp_tx);
669 if (r < 0)
670 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
671 }
8e1ad1ea 672
35778343
YW		 673 if (link->lldp_rx) {
674 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 675 if (r < 0)
676 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
677 }
678
ff254138
TG		 679 return 0;
680}
681
7657ec3e 682int link_ipv6ll_gained(Link *link) {
0c9ee5d5 683 int r;
deb2e523 684
0c9ee5d5 685 assert(link);
deb2e523 686
0c9ee5d5 687 log_link_info(link, "Gained IPv6LL");
deb2e523 688
7657ec3e
YW		 689 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
690 return 0;
0c9ee5d5 691
7657ec3e
YW		 692 r = link_acquire_dynamic_ipv6_conf(link);
693 if (r < 0)
694 return r;
0c9ee5d5 695
7657ec3e 696 link_check_ready(link);
0c9ee5d5 697 return 0;
deb2e523
TG		 698}
699
112a0972 700int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 701 bool required_up = false;
702 bool link_is_up = false;
852a3916 703 Link *l;
0d4ad91d
AR		 704
705 assert(link);
706
ad82f0c3
YW		 707 /* If at least one interface in bound_to_links has carrier, then make this interface up.
708 * If all interfaces in bound_to_links do not, then make this interface down. */
709
0d4ad91d
AR		 710 if (hashmap_isempty(link->bound_to_links))
711 return 0;
712
713 if (link->flags & IFF_UP)
714 link_is_up = true;
715
852a3916 716 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 717 if (link_has_carrier(l)) {
718 required_up = true;
719 break;
720 }
721
852a3916 722 if (!required_up && link_is_up)
68f52063 723 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 724 if (required_up && !link_is_up)
68f52063 725 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 726
727 return 0;
728}
729
730static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 731 Link *l;
732 int r;
733
734 assert(link);
735
ad82f0c3
YW		 736 /* Update up or down state of interfaces which depend on this interface's carrier state. */
737
0d4ad91d
AR		 738 if (hashmap_isempty(link->bound_by_links))
739 return 0;
740
852a3916 741 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 742 r = link_handle_bound_to_list(l);
743 if (r < 0)
744 return r;
745 }
746
747 return 0;
748}
749
750static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
751 int r;
752
753 assert(link);
754 assert(carrier);
755
756 if (link == carrier)
757 return 0;
758
759 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
760 return 0;
761
190b3b5c 762 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 763 if (r < 0)
764 return r;
765
9092113d
YW		 766 link_dirty(link);
767
0d4ad91d
AR		 768 return 0;
769}
770
771static int link_new_bound_by_list(Link *link) {
772 Manager *m;
773 Link *carrier;
0d4ad91d 774 int r;
0d4ad91d
AR		 775
776 assert(link);
777 assert(link->manager);
778
779 m = link->manager;
780
6eab614d 781 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 782 if (!carrier->network)
783 continue;
784
785 if (strv_isempty(carrier->network->bind_carrier))
786 continue;
787
191a3f16 788 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 789 r = link_put_carrier(link, carrier, &link->bound_by_links);
790 if (r < 0)
791 return r;
0d4ad91d
AR		 792 }
793 }
794
90e74a66 795 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 796 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
797 if (r < 0)
798 return r;
0d4ad91d
AR		 799 }
800
801 return 0;
802}
803
804static int link_new_bound_to_list(Link *link) {
805 Manager *m;
806 Link *carrier;
0d4ad91d 807 int r;
0d4ad91d
AR		 808
809 assert(link);
810 assert(link->manager);
811
812 if (!link->network)
813 return 0;
814
815 if (strv_isempty(link->network->bind_carrier))
816 return 0;
817
818 m = link->manager;
819
6eab614d 820 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 821 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 822 r = link_put_carrier(link, carrier, &link->bound_to_links);
823 if (r < 0)
824 return r;
0d4ad91d
AR		 825 }
826 }
827
852a3916 828 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 829 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
830 if (r < 0)
831 return r;
0d4ad91d
AR		 832 }
833
834 return 0;
835}
836
0d4ad91d 837static void link_free_bound_to_list(Link *link) {
9092113d 838 bool updated = false;
0d4ad91d 839 Link *bound_to;
0d4ad91d 840
9092113d
YW		 841 assert(link);
842
843 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
844 updated = true;
0d4ad91d
AR		 845
846 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 847 link_dirty(bound_to);
0d4ad91d
AR		 848 }
849
9092113d
YW		 850 if (updated)
851 link_dirty(link);
0d4ad91d
AR		 852}
853
854static void link_free_bound_by_list(Link *link) {
9092113d 855 bool updated = false;
0d4ad91d 856 Link *bound_by;
0d4ad91d 857
9092113d
YW		 858 assert(link);
859
860 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
861 updated = true;
0d4ad91d
AR		 862
863 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 864 link_dirty(bound_by);
0d4ad91d
AR		 865 link_handle_bound_to_list(bound_by);
866 }
867 }
868
9092113d
YW		 869 if (updated)
870 link_dirty(link);
0d4ad91d
AR		 871}
872
81357285 873static int link_append_to_master(Link *link) {
5f707e12
YW		 874 Link *master;
875 int r;
876
877 assert(link);
5f707e12 878
81357285
YW		 879 /* - The link may have no master.
880 * - RTM_NEWLINK message about master interface may not be received yet. */
881 if (link_get_master(link, &master) < 0)
882 return 0;
5f707e12 883
de7fef4b 884 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 885 if (r <= 0)
5f707e12
YW		 886 return r;
887
888 link_ref(link);
889 return 0;
890}
891
81357285 892static void link_drop_from_master(Link *link) {
5f707e12
YW		 893 Link *master;
894
895 assert(link);
896
81357285 897 if (!link->manager)
5f707e12
YW		 898 return;
899
81357285 900 if (link_get_master(link, &master) < 0)
5f707e12
YW		 901 return;
902
903 link_unref(set_remove(master->slaves, link));
904}
905
56001f02
YW		 906static void link_drop_requests(Link *link) {
907 Request *req;
908
909 assert(link);
910 assert(link->manager);
911
912 ORDERED_SET_FOREACH(req, link->manager->request_queue)
913 if (req->link == link)
e26d3d40 914 request_detach(link->manager, req);
56001f02
YW		 915}
916
cc2d7efc 917static Link *link_drop(Link *link) {
63130eb3 918 if (!link)
cc2d7efc 919 return NULL;
0d4ad91d 920
63130eb3
YW		 921 assert(link->manager);
922
0d4ad91d
AR		 923 link_set_state(link, LINK_STATE_LINGER);
924
63130eb3
YW		 925 /* Drop all references from other links and manager. Note that async netlink calls may have
926 * references to the link, and they will be dropped when we receive replies. */
927
56001f02
YW		 928 link_drop_requests(link);
929
bb193d2d
YW		 930 link_free_bound_to_list(link);
931 link_free_bound_by_list(link);
0d4ad91d 932
b0ff6dea
YW		 933 link_clear_sr_iov_ifindices(link);
934
81357285 935 link_drop_from_master(link);
5f707e12 936
4c78dc17
YW		 937 if (link->state_file)
938 (void) unlink(link->state_file);
939
63130eb3
YW		 940 link_clean(link);
941
0b54c870
YW		 942 STRV_FOREACH(n, link->alternative_names)
943 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 944 hashmap_remove(link->manager->links_by_name, link->ifname);
945
fe321d45 946 /* bonding master and its slaves have the same hardware address. */
e74f1d07 947 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 948
63130eb3 949 /* The following must be called at last. */
6eab614d 950 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 951 return link_unref(link);
0d4ad91d
AR		 952}
953
5e5b137a 954static int link_drop_foreign_config(Link *link) {
1339b950 955 int r;
0b81225e
YW		 956
957 assert(link);
958 assert(link->manager);
5e5b137a 959
5e3bb5da
YW		 960 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
961 * to remove loopback address or addresses used for root NFS. */
962
963 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
964 return 0;
965 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
966 return 0;
967 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
968 return 0;
969
e36d601c 970 r = link_drop_foreign_routes(link);
5e5b137a 971
1339b950
ZJS		 972 RET_GATHER(r, link_drop_foreign_nexthops(link));
973 RET_GATHER(r, link_drop_foreign_addresses(link));
974 RET_GATHER(r, link_drop_foreign_neighbors(link));
975 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW		 976
977 return r;
5e5b137a
TG		 978}
979
a0e99a37 980static int link_drop_managed_config(Link *link) {
1339b950 981 int r;
0b81225e
YW		 982
983 assert(link);
984 assert(link->manager);
3104883d 985
a0e99a37 986 r = link_drop_managed_routes(link);
3104883d 987
1339b950
ZJS		 988 RET_GATHER(r, link_drop_managed_nexthops(link));
989 RET_GATHER(r, link_drop_managed_addresses(link));
990 RET_GATHER(r, link_drop_managed_neighbors(link));
991 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 992
0b81225e 993 return r;
3104883d
SS		 994}
995
b4564f4e
YW		 996static void link_foreignize_config(Link *link) {
997 assert(link);
998 assert(link->manager);
999
1000 link_foreignize_routes(link);
1001 link_foreignize_nexthops(link);
1002 link_foreignize_addresses(link);
1003 link_foreignize_neighbors(link);
1004 link_foreignize_routing_policy_rules(link);
1005}
1006
c3b94251 1007static int link_configure(Link *link) {
4ecdcb07
YW		 1008 int r;
1009
ef1ba606 1010 assert(link);
b22d8a00 1011 assert(link->network);
bd08ce56 1012 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1013
1187fc33
YW		 1014 link_set_state(link, LINK_STATE_CONFIGURING);
1015
3cf58ef3
YW		 1016 r = link_new_bound_to_list(link);
1017 if (r < 0)
1018 return r;
1019
1dec9d81 1020 r = link_request_traffic_control(link);
4ecdcb07
YW		 1021 if (r < 0)
1022 return r;
1023
7558f9e7
YW		 1024 if (link->iftype == ARPHRD_CAN) {
1025 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1026 r = link_request_to_set_can(link);
1027 if (r < 0)
1028 return r;
1029
1030 return link_request_to_activate(link);
1031 }
1032
cb8453cc 1033 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1034 if (r < 0)
1035 return r;
1036
5e0534f1 1037 r = link_set_sysctl(link);
b69c3180
SS		 1038 if (r < 0)
1039 return r;
8749cbcd 1040
d05c332c 1041 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1042 if (r < 0)
1043 return r;
1044
72e65e6f
YW		 1045 r = link_request_to_set_ipoib(link);
1046 if (r < 0)
1047 return r;
1048
1187fc33 1049 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1050 if (r < 0)
1051 return r;
1052
1187fc33 1053 r = link_request_to_set_group(link);
99d2baa2
SS		 1054 if (r < 0)
1055 return r;
1056
1187fc33
YW		 1057 r = link_configure_mtu(link);
1058 if (r < 0)
1059 return r;
1060
1061 r = link_request_to_set_addrgen_mode(link);
1062 if (r < 0)
1063 return r;
1064
1065 r = link_request_to_set_master(link);
1066 if (r < 0)
1067 return r;
1068
1069 r = link_request_stacked_netdevs(link);
1070 if (r < 0)
1071 return r;
1072
1073 r = link_request_to_set_bond(link);
1074 if (r < 0)
1075 return r;
1076
1077 r = link_request_to_set_bridge(link);
1078 if (r < 0)
1079 return r;
1080
1081 r = link_request_to_set_bridge_vlan(link);
1082 if (r < 0)
1083 return r;
1084
1085 r = link_request_to_activate(link);
89fe6535
SS		 1086 if (r < 0)
1087 return r;
1088
2ffd6d73
YW		 1089 r = ipv4ll_configure(link);
1090 if (r < 0)
1091 return r;
64b21ece 1092
ccffa166 1093 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1094 if (r < 0)
1095 return r;
eb34d4af 1096
ccffa166 1097 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1098 if (r < 0)
1099 return r;
f5a8c43f 1100
ba4c7184 1101 r = link_request_ndisc(link);
2ffd6d73
YW		 1102 if (r < 0)
1103 return r;
4138fb2c 1104
1d28a3cf
YW		 1105 r = link_request_dhcp_server(link);
1106 if (r < 0)
1107 return r;
1108
a254fab2 1109 r = link_request_radv(link);
086b8853
YW		 1110 if (r < 0)
1111 return r;
7465dd22 1112
2ffd6d73
YW		 1113 r = link_lldp_rx_configure(link);
1114 if (r < 0)
1115 return r;
ce43e484 1116
c01b9b87
YW		 1117 r = link_lldp_tx_configure(link);
1118 if (r < 0)
1119 return r;
1120
5e3bb5da
YW		 1121 r = link_drop_foreign_config(link);
1122 if (r < 0)
1123 return r;
4c649652 1124
1187fc33
YW		 1125 r = link_request_static_configs(link);
1126 if (r < 0)
1127 return r;
1128
1129 if (!link_has_carrier(link))
1130 return 0;
1131
1132 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1133}
1134
170e88c8
YW		 1135static int link_get_network(Link *link, Network **ret) {
1136 Network *network;
1a3caa49 1137 int r;
170e88c8
YW		 1138
1139 assert(link);
1140 assert(link->manager);
1141 assert(ret);
1142
1143 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1144 bool warn = false;
1145
1a3caa49 1146 r = net_match_config(
170e88c8 1147 &network->match,
8de56fb3 1148 link->dev,
52135071
YW		 1149 &link->hw_addr,
1150 &link->permanent_hw_addr,
170e88c8
YW		 1151 link->driver,
1152 link->iftype,
65022cd7 1153 link->kind,
170e88c8
YW		 1154 link->ifname,
1155 link->alternative_names,
1156 link->wlan_iftype,
1157 link->ssid,
1a3caa49
YW		 1158 &link->bssid);
1159 if (r < 0)
1160 return r;
1161 if (r == 0)
170e88c8
YW		 1162 continue;
1163
8de56fb3 1164 if (network->match.ifname && link->dev) {
170e88c8
YW		 1165 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1166 const char *attr;
1167
8de56fb3 1168 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1169 (void) safe_atou8(attr, &name_assign_type);
1170
1171 warn = name_assign_type == NET_NAME_ENUM;
1172 }
1173
1174 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1175 "found matching network '%s'%s.",
1176 network->filename,
1177 warn ? ", based on potentially unpredictable interface name" : "");
1178
1179 if (network->unmanaged)
1180 return -ENOENT;
1181
1182 *ret = network;
1183 return 0;
1184 }
1185
1186 return -ENOENT;
1187}
1188
8a4ad01a 1189int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1190 Network *network = NULL;
9aa2585e 1191 NetDev *netdev = NULL;
ad932b15
YW		 1192 int r;
1193
5a1860f7 1194 assert(link);
572b21d9 1195
4faca0a3 1196 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1197 return 0;
1198
9aa2585e
YW		 1199 r = netdev_get(link->manager, link->ifname, &netdev);
1200 if (r < 0 && r != -ENOENT)
1201 return r;
1202
170e88c8 1203 r = link_get_network(link, &network);
cb71e9c6 1204 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1205 return r;
1206
fb961119
YW		 1207 if (link->state != LINK_STATE_UNMANAGED && !network)
1208 /* If link is in initialized state, then link->network is also NULL. */
1209 force = true;
1210
99b8517c 1211 if (link->network == network && !force)
ad932b15
YW		 1212 return 0;
1213
fb961119
YW		 1214 if (network) {
1215 if (link->state == LINK_STATE_INITIALIZED)
1216 log_link_info(link, "Configuring with %s.", network->filename);
1217 else
1218 log_link_info(link, "Reconfiguring with %s.", network->filename);
1219 } else
1220 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1221 "Unmanaging interface.");
ad932b15
YW		 1222
1223 /* Dropping old .network file */
2a99eed0 1224 r = link_stop_engines(link, false);
572b21d9 1225 if (r < 0)
ad932b15 1226 return r;
ad932b15 1227
19d9a5ad
YW		 1228 link_drop_requests(link);
1229
81db4f3d 1230 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1231 /* When a new/updated .network file is assigned, first make all configs (addresses,
1232 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1233 * link_drop_foreign_config() in link_configure().
1234 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1235 * here we need to drop the configs such as addresses, routes, and so on configured by
1236 * the previously assigned .network file. */
b4564f4e
YW		 1237 link_foreignize_config(link);
1238 else {
a0e99a37
YW		 1239 /* Remove all managed configs. Note, foreign configs are removed in later by
1240 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1241 r = link_drop_managed_config(link);
b4564f4e
YW		 1242 if (r < 0)
1243 return r;
1244 }
ad932b15 1245
3cf58ef3
YW		 1246 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1247 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1248 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1249 * map here, as it depends on .network files assigned to other links. */
1250 link_free_bound_to_list(link);
1251
ad932b15
YW		 1252 link_free_engines(link);
1253 link->network = network_unref(link->network);
1254
9aa2585e
YW		 1255 netdev_unref(link->netdev);
1256 link->netdev = netdev_ref(netdev);
1257
cb71e9c6
YW		 1258 if (!network) {
1259 link_set_state(link, LINK_STATE_UNMANAGED);
1260 return 0;
1261 }
1262
ad932b15 1263 /* Then, apply new .network file */
9092113d 1264 link->network = network_ref(network);
b156a95d 1265 link_update_operstate(link, true);
9092113d 1266 link_dirty(link);
ad932b15 1267
ad932b15 1268 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1269 link->activated = false;
ad932b15 1270
ad932b15
YW		 1271 r = link_configure(link);
1272 if (r < 0)
1273 return r;
1274
0e397560 1275 return 1;
ad932b15
YW		 1276}
1277
96f5f9ef 1278static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1279 int r;
1280
d09a179e
YW		 1281 assert(link);
1282
5a1860f7
YW		 1283 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1284 if (r <= 0)
1285 return r;
1286
7f80fa12 1287 r = link_reconfigure_impl(link, force);
d09a179e 1288 if (r < 0) {
572b21d9 1289 link_enter_failed(link);
d09a179e
YW		 1290 return 0;
1291 }
572b21d9 1292
d09a179e 1293 return r;
572b21d9
YW		 1294}
1295
5a1860f7 1296static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1297 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1298}
572b21d9 1299
5a1860f7 1300static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1301 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1302}
1303
a39a9ac8 1304int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1305 int r;
1306
1307 assert(link);
d09a179e 1308
8bceafa7 1309 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1310 * the function from being called multiple times simultaneously, refuse to reconfigure the
1311 * interface in these cases. */
8bceafa7 1312 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1313 return 0; /* 0 means no-op. */
2c0d7ed3 1314
a39a9ac8 1315 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1316 if (r < 0)
1317 return r;
1318
8bceafa7 1319 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1320}
1321
e6bf7774 1322static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1323 int r;
1324
1325 assert(link);
505f8da7
TG		 1326 assert(link->manager);
1327
faa2e64f
YW		 1328 if (link->manager->test_mode) {
1329 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1330 link_set_state(link, LINK_STATE_UNMANAGED);
1331 return 0;
1332 }
1333
40695457
YW		 1334 if (link->state == LINK_STATE_PENDING) {
1335 log_link_debug(link, "Link state is up-to-date");
1336 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1337
40695457
YW		 1338 r = link_new_bound_by_list(link);
1339 if (r < 0)
1340 return r;
0d4ad91d 1341
40695457
YW		 1342 r = link_handle_bound_by_list(link);
1343 if (r < 0)
1344 return r;
1345 }
0d4ad91d 1346
fb961119 1347 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1348}
1349
302a796f 1350static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1351 int r;
1352
5a1860f7
YW		 1353 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1354 if (r <= 0)
0b54c870 1355 return r;
572b21d9 1356
4ff296b0
YW		 1357 r = link_initialized_and_synced(link);
1358 if (r < 0)
1359 link_enter_failed(link);
5a1860f7
YW		 1360
1361 return 0;
e6bf7774
YW		 1362}
1363
3be9d62a 1364static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1365 int r;
1366
4f561e8e 1367 assert(link);
4f561e8e
TG		 1368 assert(device);
1369
160203e9
YW		 1370 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1371 * or sysattrs) may be outdated. */
8de56fb3 1372 device_unref_and_replace(link->dev, device);
4f561e8e 1373
3b1dbdf0
YW		 1374 if (link->dhcp_client) {
1375 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1376 if (r < 0)
1377 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1378 }
1379
1380 if (link->dhcp6_client) {
1381 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1382 if (r < 0)
1383 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1384 }
1385
b0ff6dea
YW		 1386 r = link_set_sr_iov_ifindices(link);
1387 if (r < 0)
1388 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1389
40695457
YW		 1390 if (link->state != LINK_STATE_PENDING)
1391 return link_reconfigure(link, /* force = */ false);
679b3605 1392
79008bdd 1393 log_link_debug(link, "udev initialized link");
4f561e8e 1394
3c9b8860
TG		 1395 /* udev has initialized the link, but we don't know if we have yet
1396 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1397 * when it returns we know that the pending NEWLINKs have already been
1398 * processed and that we are up-to-date */
4f561e8e 1399
5a1860f7 1400 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1401}
1402
0d411b7f 1403static int link_check_initialized(Link *link) {
51517f9e 1404 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1405 int r;
505f8da7 1406
0d411b7f 1407 assert(link);
505f8da7 1408
82f52245 1409 if (!udev_available())
0d411b7f 1410 return link_initialized_and_synced(link);
852a3916
YW		 1411
1412 /* udev should be around */
0ac655a6 1413 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1414 if (r < 0) {
1415 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1416 return 0;
1417 }
1418
1419 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1420 if (r < 0)
1421 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1422 if (r == 0) {
1423 /* not yet ready */
1424 log_link_debug(link, "link pending udev initialization...");
1425 return 0;
1426 }
1427
1428 r = device_is_renaming(device);
0d411b7f
YW		 1429 if (r < 0)
1430 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1431 if (r > 0) {
1432 log_link_debug(link, "Interface is being renamed, pending initialization.");
1433 return 0;
4f561e8e 1434 }
505f8da7 1435
0d411b7f 1436 return link_initialized(link, device);
a748b692
TG		 1437}
1438
1fd3ac1e 1439int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1440 int r, ifindex;
1fd3ac1e 1441 Link *link;
3be9d62a
YW		 1442
1443 assert(m);
1444 assert(device);
1445
3be9d62a 1446 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1447 if (r < 0)
1448 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1449
75255a8d
YW		 1450 r = link_get_by_index(m, ifindex, &link);
1451 if (r < 0) {
1452 /* This error is not critical, as the corresponding rtnl message may be received later. */
1453 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1454 return 0;
1455 }
1456
1457 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1458 * object here. It will be removed only when rtnetlink says so. */
1459 if (action == SD_DEVICE_REMOVE) {
1460 link->dev = sd_device_unref(link->dev);
1461 return 0;
1462 }
1463
3be9d62a 1464 r = device_is_renaming(device);
1fd3ac1e
YW		 1465 if (r < 0)
1466 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1467 if (r > 0) {
1fd3ac1e 1468 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1469 /* TODO:
1470 * What happens when a device is initialized, then soon renamed after that? When we detect
1471 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1472 return 0;
1473 }
1474
4b9a8c2b
YW		 1475 r = link_initialized(link, device);
1476 if (r < 0)
1477 link_enter_failed(link);
3be9d62a
YW		 1478
1479 return 0;
1480}
1481
9c0a72f9 1482static int link_carrier_gained(Link *link) {
6706ce2f 1483 bool force_reconfigure;
9c0a72f9
TG		 1484 int r;
1485
1486 assert(link);
1487
6706ce2f
YW		 1488 r = event_source_disable(link->carrier_lost_timer);
1489 if (r < 0)
1490 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1491
d9910948
YW		 1492 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1493 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1494 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1495 * restarted, and the correct network information will be gained.
1496 *
1497 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1498 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1499 * already assigned to the interface (in that case, the .network file does not have the SSID=
1500 * setting in the [Match] section), and the interface is already being configured. Of course,
1501 * there may exist another .network file with higher priority and a matching SSID= setting. But
1502 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1503 *
6706ce2f 1504 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1505 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1506 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1507 link->previous_ssid = mfree(link->previous_ssid);
1508
986b2514
AŠ		 1509 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1510 * profile wants to match on it with SSID= in its [Match] section.
1511 */
1512 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1513 r = link_get_wlan_interface(link);
1514 if (r < 0)
1515 return r;
1516 }
1517
081466bd
YW		 1518 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1519 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1520 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1521 r = link_reconfigure_impl(link, force_reconfigure);
1522 if (r != 0)
1523 return r;
b7ac1284 1524
aa9117c0
YW		 1525 r = link_handle_bound_by_list(link);
1526 if (r < 0)
1527 return r;
1528
600b7898
YW		 1529 if (link->iftype == ARPHRD_CAN)
1530 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1531 return 0;
600b7898 1532
b9ea3d2e 1533 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1534 r = link_acquire_dynamic_conf(link);
f0269653 1535 if (r < 0)
9c0a72f9 1536 return r;
6fc25497 1537
97108953 1538 r = link_request_static_configs(link);
6fc25497
SS		 1539 if (r < 0)
1540 return r;
9c0a72f9
TG		 1541 }
1542
aa9117c0 1543 return 0;
9c0a72f9
TG		 1544}
1545
6706ce2f
YW		 1546static int link_carrier_lost_impl(Link *link) {
1547 int r, ret = 0;
1548
1549 assert(link);
1550
1551 link->previous_ssid = mfree(link->previous_ssid);
1552
1553 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1554 return 0;
1555
1556 if (!link->network)
1557 return 0;
1558
1559 r = link_stop_engines(link, false);
1560 if (r < 0)
1561 ret = r;
1562
a0e99a37 1563 r = link_drop_managed_config(link);
6706ce2f
YW		 1564 if (r < 0 && ret >= 0)
1565 ret = r;
1566
1567 return ret;
1568}
1569
1570static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1571 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1572 int r;
1573
6706ce2f
YW		 1574 r = link_carrier_lost_impl(link);
1575 if (r < 0) {
1576 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1577 link_enter_failed(link);
1578 }
1579
1580 return 0;
1581}
1582
9c0a72f9 1583static int link_carrier_lost(Link *link) {
b7326069
YW		 1584 uint16_t dhcp_mtu;
1585 usec_t usec;
9c0a72f9
TG		 1586 int r;
1587
1588 assert(link);
1589
aa9117c0
YW		 1590 r = link_handle_bound_by_list(link);
1591 if (r < 0)
1592 return r;
93b4dab5 1593
600b7898
YW		 1594 if (link->iftype == ARPHRD_CAN)
1595 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1596 return 0;
1597
f1c22cf4
YW		 1598 if (!link->network)
1599 return 0;
1600
b7326069
YW		 1601 if (link->network->ignore_carrier_loss_set)
1602 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1603 usec = link->network->ignore_carrier_loss_usec;
1604
1605 else if (link->network->bond && link->wlan_iftype > 0)
1606 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1607 * carrier to be lost. See #19832. */
1608 usec = 3 * USEC_PER_SEC;
1609
1610 else if (link->network->dhcp_use_mtu &&
1611 link->dhcp_lease &&
1612 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1613 dhcp_mtu != link->original_mtu)
1614 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1615 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1616 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1617 usec = 5 * USEC_PER_SEC;
1618
1619 else
1620 /* Otherwise, use the currently set value. */
1621 usec = link->network->ignore_carrier_loss_usec;
1622
1623 if (usec == USEC_INFINITY)
aa9117c0 1624 return 0;
600b7898 1625
b7326069 1626 if (usec == 0)
6706ce2f
YW		 1627 return link_carrier_lost_impl(link);
1628
1629 return event_reset_time_relative(link->manager->event,
1630 &link->carrier_lost_timer,
ba4e0427 1631 CLOCK_BOOTTIME,
b7326069 1632 usec,
6706ce2f
YW		 1633 0,
1634 link_carrier_lost_handler,
1635 link,
1636 0,
1637 "link-carrier-loss",
1638 true);
0c9ee5d5
YW		 1639}
1640
0c9ee5d5
YW		 1641static int link_admin_state_up(Link *link) {
1642 int r;
1643
1644 assert(link);
1645
1646 /* This is called every time an interface admin state changes to up;
1647 * specifically, when IFF_UP flag changes from unset to set. */
1648
1649 if (!link->network)
1650 return 0;
1651
899b0e5e 1652 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1653 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1654 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1655 }
1656
1657 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1658 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1659 r = link_set_ipv6_mtu(link);
1660 if (r < 0)
1661 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1662
1663 return 0;
1664}
1665
1666static int link_admin_state_down(Link *link) {
1667 assert(link);
1668
1669 if (!link->network)
1670 return 0;
1671
899b0e5e 1672 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1673 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1674 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1675 }
1676
1677 return 0;
1678}
1679
0c9ee5d5
YW		 1680static bool link_is_enslaved(Link *link) {
1681 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1682 return true;
1683
1f024462 1684 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1685 return true;
1686
0c9ee5d5
YW		 1687 return false;
1688}
1689
1690static LinkAddressState address_state_from_scope(uint8_t scope) {
1691 if (scope < RT_SCOPE_SITE)
1692 /* universally accessible addresses found */
1693 return LINK_ADDRESS_STATE_ROUTABLE;
1694
1695 if (scope < RT_SCOPE_HOST)
1696 /* only link or site local addresses found */
1697 return LINK_ADDRESS_STATE_DEGRADED;
1698
1699 /* no useful addresses found */
1700 return LINK_ADDRESS_STATE_OFF;
1701}
1702
1703void link_update_operstate(Link *link, bool also_update_master) {
1704 LinkOperationalState operstate;
1705 LinkCarrierState carrier_state;
1706 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1707 LinkOnlineState online_state;
1708 _cleanup_strv_free_ char **p = NULL;
1709 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1710 bool changed = false;
1711 Address *address;
1712
1713 assert(link);
1714
1715 if (link->kernel_operstate == IF_OPER_DORMANT)
1716 carrier_state = LINK_CARRIER_STATE_DORMANT;
1717 else if (link_has_carrier(link)) {
1718 if (link_is_enslaved(link))
1719 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1720 else
1721 carrier_state = LINK_CARRIER_STATE_CARRIER;
1722 } else if (link->flags & IFF_UP)
1723 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1724 else
1725 carrier_state = LINK_CARRIER_STATE_OFF;
1726
1727 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1728 Link *slave;
1729
1730 SET_FOREACH(slave, link->slaves) {
1731 link_update_operstate(slave, false);
1732
1733 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1734 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1735 }
1736 }
1737
1738 SET_FOREACH(address, link->addresses) {
1739 if (!address_is_ready(address))
1740 continue;
1741
1742 if (address->family == AF_INET)
1743 ipv4_scope = MIN(ipv4_scope, address->scope);
1744
1745 if (address->family == AF_INET6)
1746 ipv6_scope = MIN(ipv6_scope, address->scope);
1747 }
1748
0c9ee5d5
YW		 1749 ipv4_address_state = address_state_from_scope(ipv4_scope);
1750 ipv6_address_state = address_state_from_scope(ipv6_scope);
1751 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1752
1753 /* Mapping of address and carrier state vs operational state
1754 * carrier state
1755 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1756 * ------------------------------------------------------------------------------
1757 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1758 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1759 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1760 */
1761
cf4dbd84
HH		 1762 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1763 operstate = LINK_OPERSTATE_ROUTABLE;
1764 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1765 operstate = LINK_OPERSTATE_DEGRADED;
1766 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1767 operstate = (LinkOperationalState) carrier_state;
1768 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1769 operstate = LINK_OPERSTATE_ROUTABLE;
1770 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1771 operstate = LINK_OPERSTATE_DEGRADED;
1772 else
1773 operstate = LINK_OPERSTATE_ENSLAVED;
1774
1775 /* Only determine online state for managed links with RequiredForOnline=yes */
1776 if (!link->network || !link->network->required_for_online)
1777 online_state = _LINK_ONLINE_STATE_INVALID;
1778 else if (operstate < link->network->required_operstate_for_online.min ||
1779 operstate > link->network->required_operstate_for_online.max)
1780 online_state = LINK_ONLINE_STATE_OFFLINE;
1781 else {
1782 AddressFamily required_family = link->network->required_family_for_online;
1783 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1784 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1785
1786 /* The operational state is within the range required for online.
1787 * If a particular address family is also required, we might revert
1788 * to offline in the blocks below. */
1789 online_state = LINK_ONLINE_STATE_ONLINE;
1790
1791 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1792 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1793 online_state = LINK_ONLINE_STATE_OFFLINE;
1794 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1795 online_state = LINK_ONLINE_STATE_OFFLINE;
1796 }
1797
1798 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1799 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1800 online_state = LINK_ONLINE_STATE_OFFLINE;
1801 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1802 online_state = LINK_ONLINE_STATE_OFFLINE;
1803 }
1804 }
1805
1806 if (link->carrier_state != carrier_state) {
1807 link->carrier_state = carrier_state;
1808 changed = true;
1809 if (strv_extend(&p, "CarrierState") < 0)
1810 log_oom();
1811 }
1812
1813 if (link->address_state != address_state) {
1814 link->address_state = address_state;
1815 changed = true;
1816 if (strv_extend(&p, "AddressState") < 0)
1817 log_oom();
1818 }
0d4ad91d 1819
0c9ee5d5
YW		 1820 if (link->ipv4_address_state != ipv4_address_state) {
1821 link->ipv4_address_state = ipv4_address_state;
1822 changed = true;
1823 if (strv_extend(&p, "IPv4AddressState") < 0)
1824 log_oom();
1825 }
9c0a72f9 1826
0c9ee5d5
YW		 1827 if (link->ipv6_address_state != ipv6_address_state) {
1828 link->ipv6_address_state = ipv6_address_state;
1829 changed = true;
1830 if (strv_extend(&p, "IPv6AddressState") < 0)
1831 log_oom();
1832 }
9c0a72f9 1833
0c9ee5d5
YW		 1834 if (link->operstate != operstate) {
1835 link->operstate = operstate;
1836 changed = true;
1837 if (strv_extend(&p, "OperationalState") < 0)
1838 log_oom();
1839 }
9c0a72f9 1840
0c9ee5d5
YW		 1841 if (link->online_state != online_state) {
1842 link->online_state = online_state;
1843 changed = true;
1844 if (strv_extend(&p, "OnlineState") < 0)
1845 log_oom();
1846 }
9c0a72f9 1847
0c9ee5d5
YW		 1848 if (p)
1849 link_send_changed_strv(link, p);
1850 if (changed)
1851 link_dirty(link);
9c0a72f9 1852
0c9ee5d5
YW		 1853 if (also_update_master) {
1854 Link *master;
9c0a72f9 1855
0c9ee5d5
YW		 1856 if (link_get_master(link, &master) >= 0)
1857 link_update_operstate(master, true);
1858 }
9c0a72f9
TG		 1859}
1860
0c9ee5d5
YW		 1861#define FLAG_STRING(string, flag, old, new) \
1862 (((old ^ new) & flag) \
1863 ? ((old & flag) ? (" -" string) : (" +" string)) \
1864 : "")
1865
0d411b7f 1866static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1867 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1868 uint8_t operstate;
1869 unsigned flags;
d236718c
DS		 1870 int r;
1871
61135582 1872 assert(link);
0d411b7f 1873 assert(message);
61135582 1874
0d411b7f 1875 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1876 if (r < 0)
0d411b7f 1877 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1878
0d411b7f
YW		 1879 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1880 if (r == -ENODATA)
1881 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1882 operstate = link->kernel_operstate;
0d411b7f
YW		 1883 else if (r < 0)
1884 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1885
0d411b7f 1886 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1887 return 0;
1888
0c9ee5d5
YW		 1889 if (link->flags != flags) {
1890 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1891
0c9ee5d5
YW		 1892 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",
1893 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1894 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1895 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1896 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1897 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1898 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1899 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1900 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1901 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1902 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1903 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1904 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1905 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1906 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1907 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1908 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1909 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1910 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1911 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1912
0c9ee5d5
YW		 1913 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1914 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1915 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1916 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1917 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1918 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1919 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1920 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1921
0c9ee5d5
YW		 1922 if (unknown_flags_added)
1923 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1924
0c9ee5d5
YW		 1925 if (unknown_flags_removed)
1926 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1927 }
61135582 1928
0d411b7f
YW		 1929 link_was_admin_up = link->flags & IFF_UP;
1930 had_carrier = link_has_carrier(link);
1931
0c9ee5d5
YW		 1932 link->flags = flags;
1933 link->kernel_operstate = operstate;
36161cba 1934
0c9ee5d5 1935 link_update_operstate(link, true);
61135582 1936
0d411b7f
YW		 1937 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1938 log_link_info(link, "Link UP");
22936833 1939
0d411b7f
YW		 1940 r = link_admin_state_up(link);
1941 if (r < 0)
1942 return r;
1943 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1944 log_link_info(link, "Link DOWN");
0d4ad91d 1945
0d411b7f 1946 r = link_admin_state_down(link);
0d4ad91d
AR		 1947 if (r < 0)
1948 return r;
7619683b
TG		 1949 }
1950
0d411b7f
YW		 1951 if (!had_carrier && link_has_carrier(link)) {
1952 log_link_info(link, "Gained carrier");
0d4ad91d 1953
0d411b7f 1954 r = link_carrier_gained(link);
30de2b89
YW		 1955 if (r < 0)
1956 return r;
0d411b7f
YW		 1957 } else if (had_carrier && !link_has_carrier(link)) {
1958 log_link_info(link, "Lost carrier");
1959
1960 r = link_carrier_lost(link);
0b54c870
YW		 1961 if (r < 0)
1962 return r;
b8941f74
TG		 1963 }
1964
0d411b7f
YW		 1965 return 0;
1966}
afe7fd56 1967
0d411b7f
YW		 1968static int link_update_master(Link *link, sd_netlink_message *message) {
1969 int master_ifindex, r;
7465dd22 1970
0d411b7f
YW		 1971 assert(link);
1972 assert(message);
69629de9 1973
0d411b7f
YW		 1974 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1975 if (r == -ENODATA)
1976 return 0;
1977 if (r < 0)
1978 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1979
571bf1aa
YW		 1980 if (master_ifindex == link->ifindex)
1981 master_ifindex = 0;
1982
0d411b7f
YW		 1983 if (master_ifindex == link->master_ifindex)
1984 return 0;
807667f7 1985
0d411b7f 1986 if (link->master_ifindex == 0)
8458ca26 1987 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 1988 else if (master_ifindex == 0)
8458ca26 1989 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 1990 else
e2341b6b
DT		 1991 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
1992 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 1993
0d411b7f 1994 link_drop_from_master(link);
807667f7 1995
0d411b7f 1996 link->master_ifindex = master_ifindex;
413708d1 1997
0d411b7f
YW		 1998 r = link_append_to_master(link);
1999 if (r < 0)
2000 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2001
0d411b7f
YW		 2002 return 0;
2003}
807667f7 2004
e1658632
YW		 2005static int link_update_driver(Link *link, sd_netlink_message *message) {
2006 int r;
2007
2008 assert(link);
2009 assert(link->manager);
2010 assert(message);
2011
2012 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2013 if (link->ethtool_driver_read)
e1658632
YW		 2014 return 0;
2015
2016 /* When udevd is running, read the driver after the interface is initialized by udevd.
2017 * Otherwise, ethtool may not work correctly. See issue #22538.
2018 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2019 if (udev_available() && !link->dev)
e1658632
YW		 2020 return 0;
2021
6625c39e
YW		 2022 link->ethtool_driver_read = true;
2023
e1658632
YW		 2024 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2025 if (r < 0) {
2026 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2027 return 0;
2028 }
2029
2030 log_link_debug(link, "Found driver: %s", strna(link->driver));
2031
2032 if (streq_ptr(link->driver, "dsa")) {
2033 uint32_t dsa_master_ifindex = 0;
2034
2035 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2036 if (r < 0 && r != -ENODATA)
2037 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2038
2039 if (dsa_master_ifindex > INT_MAX) {
2040 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2041 dsa_master_ifindex);
2042 dsa_master_ifindex = 0;
2043 }
2044
2045 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2046 }
2047
40695457 2048 return 1; /* needs reconfigure */
e1658632
YW		 2049}
2050
6625c39e 2051static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2052 int r;
2053
2054 assert(link);
2055 assert(link->manager);
2056 assert(message);
2057
6625c39e 2058 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2059 return 0;
2060
2061 /* When udevd is running, read the permanent hardware address after the interface is
2062 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2063 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2064 if (udev_available() && !link->dev)
2065 return 0;
2066
2067 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2068 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2069 if (r == -ENODATA)
2070 return 0;
2071 if (r < 0)
2072 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2073
2074 link->ethtool_permanent_hw_addr_read = true;
2075
2076 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2077 if (r < 0)
2078 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2079
2080 return 0;
2081}
2082
2083static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2084 int r;
2085
2086 assert(link);
2087 assert(link->manager);
2088 assert(message);
2089
2090 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2091 return 0;
2092
2093 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2094 if (r < 0) {
2095 if (r != -ENODATA)
2096 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2097
6625c39e
YW		 2098 /* Fallback to ethtool for older kernels. */
2099 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2100 if (r < 0)
2101 return r;
e1658632
YW		 2102 }
2103
2104 if (link->permanent_hw_addr.length > 0)
2105 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2106
40695457 2107 return 1; /* needs reconfigure */
e1658632
YW		 2108}
2109
0d411b7f 2110static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2111 struct hw_addr_data addr;
0d411b7f 2112 int r;
d93d655c 2113
0d411b7f
YW		 2114 assert(link);
2115 assert(message);
dfc58b47 2116
0d411b7f
YW		 2117 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2118 if (r < 0 && r != -ENODATA)
2119 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2120
e2bacccd 2121 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2122 if (r == -ENODATA)
2123 return 0;
2124 if (r < 0)
fe321d45 2125 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2126
e2bacccd 2127 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2128 return 0;
a61bb41c 2129
de0f1579 2130 if (link->hw_addr.length == 0)
e2bacccd 2131 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2132 else {
e2341b6b
DT		 2133 log_link_debug(link, "Hardware address is changed: %s %s %s",
2134 HW_ADDR_TO_STR(&link->hw_addr),
2135 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2136 HW_ADDR_TO_STR(&addr));
0d411b7f 2137
e74f1d07 2138 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2139 }
2140
e2bacccd
YW		 2141 link->hw_addr = addr;
2142
fe321d45
YW		 2143 if (!hw_addr_is_null(&link->hw_addr)) {
2144 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2145 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2146 /* bonding master and its slaves have the same hardware address. */
2147 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2148 if (r < 0)
2149 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2150 }
0d411b7f 2151
0a14f83a 2152 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2153 if (r < 0)
2154 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2155
0d411b7f 2156 r = ipv4ll_update_mac(link);
a61bb41c 2157 if (r < 0)
0d411b7f 2158 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2159
0d411b7f
YW		 2160 r = dhcp4_update_mac(link);
2161 if (r < 0)
2162 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2163
0d411b7f
YW		 2164 r = dhcp6_update_mac(link);
2165 if (r < 0)
2166 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2167
2168 r = radv_update_mac(link);
2169 if (r < 0)
2170 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2171
3be64aa4 2172 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2173 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2174 if (r < 0)
0d411b7f
YW		 2175 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2176 }
d236718c 2177
35778343
YW		 2178 if (link->lldp_rx) {
2179 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2180 if (r < 0)
c01b9b87
YW		 2181 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2182 }
2183
2184 if (link->lldp_tx) {
2185 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2186 if (r < 0)
2187 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2188 }
2189
40695457 2190 return 1; /* needs reconfigure */
0d411b7f 2191}
a61bb41c 2192
0d411b7f 2193static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2194 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2195 int r;
a61bb41c 2196
0d411b7f
YW		 2197 assert(link);
2198 assert(message);
2199
2200 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2201 if (r == -ENODATA)
2202 return 0;
2203 if (r < 0)
2204 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2205 if (mtu == 0)
2206 return 0;
0d411b7f 2207
717ba5fc
YW		 2208 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2209 if (r < 0 && r != -ENODATA)
2210 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2211
2212 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2213 if (r < 0 && r != -ENODATA)
2214 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2215
717ba5fc
YW		 2216 if (max_mtu == 0)
2217 max_mtu = UINT32_MAX;
2218
2219 link->min_mtu = min_mtu;
2220 link->max_mtu = max_mtu;
2221
0d411b7f
YW		 2222 if (link->original_mtu == 0) {
2223 link->original_mtu = mtu;
717ba5fc
YW		 2224 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2225 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2226 }
2227
717ba5fc
YW		 2228 if (link->mtu == mtu)
2229 return 0;
2230
b5d0fd1e 2231 if (link->mtu != 0)
e2341b6b
DT		 2232 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2233 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2234 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2235
2236 link->mtu = mtu;
2237
2238 if (link->dhcp_client) {
2239 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2240 if (r < 0)
0d411b7f
YW		 2241 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2242 }
a61bb41c 2243
0d411b7f
YW		 2244 if (link->radv) {
2245 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2246 if (r < 0)
0d411b7f 2247 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2248 }
2249
2250 return 0;
dd3efc09 2251}
fe8db0c5 2252
0d411b7f
YW		 2253static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2254 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2255 int r;
2256
2257 assert(link);
2258 assert(message);
2259
2260 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2261 if (r == -ENODATA)
2368ff81 2262 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2263 * interface has no alternative name. */
2264 return 0;
2265 if (r < 0)
0d411b7f
YW		 2266 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2267
1b345c1e
YW		 2268 if (strv_equal(altnames, link->alternative_names))
2269 return 0;
2270
0d411b7f
YW		 2271 STRV_FOREACH(n, link->alternative_names)
2272 hashmap_remove(link->manager->links_by_name, *n);
2273
2274 strv_free_and_replace(link->alternative_names, altnames);
2275
2276 STRV_FOREACH(n, link->alternative_names) {
2277 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2278 if (r < 0)
2279 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2280 }
2281
40695457 2282 return 1; /* needs reconfigure */
0d411b7f
YW		 2283}
2284
2285static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2286 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2287 const char *ifname;
2288 int r;
2289
2290 assert(link);
2291 assert(message);
2292
2293 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2294 if (r == -ENODATA)
7802194a 2295 /* Hmm?? But ok. */
0d411b7f
YW		 2296 return 0;
2297 if (r < 0)
2298 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2299
2300 if (streq(ifname, link->ifname))
2301 return 0;
2302
01afd0f7
YW		 2303 r = format_ifname(link->ifindex, ifname_from_index);
2304 if (r < 0)
2305 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2306
2307 if (!streq(ifname, ifname_from_index)) {
2308 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2309 "with the name currently configured on the actual interface '%s'. Ignoring.",
2310 ifname, ifname_from_index);
2311 return 0;
2312 }
2313
0d411b7f
YW		 2314 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2315
2316 hashmap_remove(link->manager->links_by_name, link->ifname);
2317
2318 r = free_and_strdup(&link->ifname, ifname);
2319 if (r < 0)
2320 return log_oom_debug();
2321
2322 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2323 if (r < 0)
2324 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2325
54d1fdb2
YW		 2326 if (link->dhcp_client) {
2327 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2328 if (r < 0)
2329 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2330 }
2331
2332 if (link->dhcp6_client) {
2333 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2334 if (r < 0)
2335 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2336 }
2337
2338 if (link->ndisc) {
2339 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2340 if (r < 0)
2341 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2342 }
2343
2344 if (link->dhcp_server) {
2345 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2346 if (r < 0)
2347 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2348 }
2349
2350 if (link->radv) {
2351 r = sd_radv_set_ifname(link->radv, link->ifname);
2352 if (r < 0)
2353 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2354 }
2355
35778343
YW		 2356 if (link->lldp_rx) {
2357 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2358 if (r < 0)
c01b9b87
YW		 2359 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2360 }
2361
2362 if (link->lldp_tx) {
2363 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2364 if (r < 0)
2365 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2366 }
2367
2368 if (link->ipv4ll) {
2369 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2370 if (r < 0)
2371 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2372 }
2373
86173383
YW		 2374 r = ipv4acd_set_ifname(link);
2375 if (r < 0)
2376 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2377
40695457 2378 return 1; /* needs reconfigure */
0d411b7f
YW		 2379}
2380
2381static int link_update(Link *link, sd_netlink_message *message) {
40695457 2382 bool needs_reconfigure = false;
0d411b7f
YW		 2383 int r;
2384
2385 assert(link);
2386 assert(message);
2387
2388 r = link_update_name(link, message);
2389 if (r < 0)
2390 return r;
40695457 2391 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2392
2393 r = link_update_alternative_names(link, message);
2394 if (r < 0)
2395 return r;
40695457 2396 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2397
2398 r = link_update_mtu(link, message);
2399 if (r < 0)
2400 return r;
2401
e1658632
YW		 2402 r = link_update_driver(link, message);
2403 if (r < 0)
2404 return r;
40695457 2405 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2406
2407 r = link_update_permanent_hardware_address(link, message);
2408 if (r < 0)
2409 return r;
40695457 2410 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2411
0d411b7f
YW		 2412 r = link_update_hardware_address(link, message);
2413 if (r < 0)
2414 return r;
40695457 2415 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2416
2417 r = link_update_master(link, message);
2418 if (r < 0)
2419 return r;
2420
7d0d832d
YW		 2421 r = link_update_ipv6ll_addrgen_mode(link, message);
2422 if (r < 0)
2423 return r;
2424
40695457
YW		 2425 r = link_update_flags(link, message);
2426 if (r < 0)
2427 return r;
2428
2429 return needs_reconfigure;
0d411b7f
YW		 2430}
2431
0c9ee5d5
YW		 2432static Link *link_drop_or_unref(Link *link) {
2433 if (!link)
2434 return NULL;
2435 if (!link->manager)
2436 return link_unref(link);
2437 return link_drop(link);
2438}
2439
2440DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2441
2442static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2443 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2444 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2445 unsigned short iftype;
2446 int r, ifindex;
0c9ee5d5
YW		 2447
2448 assert(manager);
2449 assert(message);
2450 assert(ret);
2451
0c9ee5d5
YW		 2452 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2453 if (r < 0)
0d411b7f 2454 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2455 else if (ifindex <= 0)
0d411b7f 2456 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2457
2458 r = sd_rtnl_message_link_get_type(message, &iftype);
2459 if (r < 0)
0d411b7f 2460 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2461
2462 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2463 if (r < 0)
0d411b7f 2464 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2465
2466 /* check for link kind */
2467 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2468 if (r >= 0) {
0d411b7f
YW		 2469 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2470 if (r < 0 && r != -ENODATA)
2471 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2472 r = sd_netlink_message_exit_container(message);
2473 if (r < 0)
0d411b7f 2474 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2475 }
2476
4c78dc17
YW		 2477 if (!manager->test_mode) {
2478 /* Do not update state files when running in test mode. */
2479 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2480 return log_oom_debug();
0d411b7f 2481
4c78dc17
YW		 2482 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2483 return log_oom_debug();
0d411b7f 2484
4c78dc17
YW		 2485 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2486 return log_oom_debug();
2487 }
0d411b7f 2488
0c9ee5d5
YW		 2489 link = new(Link, 1);
2490 if (!link)
2491 return -ENOMEM;
2492
2493 *link = (Link) {
2494 .n_ref = 1,
2495 .state = LINK_STATE_PENDING,
2496 .online_state = _LINK_ONLINE_STATE_INVALID,
2497 .ifindex = ifindex,
2498 .iftype = iftype,
2499 .ifname = TAKE_PTR(ifname),
2500 .kind = TAKE_PTR(kind),
2501
7d0d832d
YW		 2502 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2503
0d411b7f
YW		 2504 .state_file = TAKE_PTR(state_file),
2505 .lease_file = TAKE_PTR(lease_file),
2506 .lldp_file = TAKE_PTR(lldp_file),
2507
0c9ee5d5
YW		 2508 .n_dns = UINT_MAX,
2509 .dns_default_route = -1,
2510 .llmnr = _RESOLVE_SUPPORT_INVALID,
2511 .mdns = _RESOLVE_SUPPORT_INVALID,
2512 .dnssec_mode = _DNSSEC_MODE_INVALID,
2513 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2514 };
2515
6eab614d 2516 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2517 if (r < 0)
0d411b7f 2518 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2519
2520 link->manager = manager;
2521
0d411b7f 2522 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2523 if (r < 0)
0d411b7f 2524 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2525
8a77e245
YW		 2526 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2527 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2528
9c5b8d46
AŠ		 2529 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2530 * message arrived too early. Request the wireless link information again.
2531 */
2532 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2533 r = link_get_wlan_interface(link);
2534 if (r < 0)
2535 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2536 }
2537
0c9ee5d5 2538 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2539 return 0;
2540}
2541
0d411b7f 2542int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2543 Link *link = NULL;
2544 NetDev *netdev = NULL;
2545 uint16_t type;
2546 const char *name;
2547 int r, ifindex;
2548
2549 assert(rtnl);
2550 assert(message);
0d411b7f 2551 assert(manager);
3be9d62a
YW		 2552
2553 if (sd_netlink_message_is_error(message)) {
2554 r = sd_netlink_message_get_errno(message);
2555 if (r < 0)
2556 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2557
2558 return 0;
2559 }
2560
2561 r = sd_netlink_message_get_type(message, &type);
2562 if (r < 0) {
2563 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2564 return 0;
2565 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2566 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2567 return 0;
2568 }
2569
2570 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2571 if (r < 0) {
2572 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2573 return 0;
2574 } else if (ifindex <= 0) {
2575 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2576 return 0;
2577 }
2578
2579 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2580 if (r < 0) {
2581 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2582 return 0;
2583 }
2584
6eab614d 2585 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2586 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2587
2588 switch (type) {
2589 case RTM_NEWLINK:
0d411b7f
YW		 2590 if (netdev) {
2591 /* netdev exists, so make sure the ifindex matches */
2592 r = netdev_set_ifindex(netdev, message);
2593 if (r < 0) {
66141164 2594 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2595 return 0;
2596 }
2597 }
2598
3be9d62a
YW		 2599 if (!link) {
2600 /* link is new, so add it */
0d411b7f 2601 r = link_new(manager, message, &link);
3be9d62a 2602 if (r < 0) {
0d411b7f 2603 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2604 return 0;
2605 }
3be9d62a 2606
0d411b7f 2607 r = link_update(link, message);
3be9d62a 2608 if (r < 0) {
66141164 2609 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2610 link_enter_failed(link);
3be9d62a
YW		 2611 return 0;
2612 }
3be9d62a 2613
0d411b7f
YW		 2614 r = link_check_initialized(link);
2615 if (r < 0) {
66141164 2616 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2617 link_enter_failed(link);
2618 return 0;
2619 }
2620 } else {
2621 r = link_update(link, message);
2622 if (r < 0) {
66141164 2623 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2624 link_enter_failed(link);
2625 return 0;
2626 }
40695457
YW		 2627 if (r > 0) {
2628 r = link_reconfigure_impl(link, /* force = */ false);
2629 if (r < 0) {
2630 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2631 link_enter_failed(link);
2632 return 0;
2633 }
2634 }
3be9d62a 2635 }
3be9d62a
YW		 2636 break;
2637
2638 case RTM_DELLINK:
2639 link_drop(link);
2640 netdev_drop(netdev);
3be9d62a
YW		 2641 break;
2642
2643 default:
04499a70 2644 assert_not_reached();
3be9d62a
YW		 2645 }
2646
2647 return 1;
2648}
2649
79c6e114
YW		 2650int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2651 uint16_t message_type;
2652 int r;
2653
2654 assert(m);
2655 assert(link);
2656 assert(error_msg);
2657
2658 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2659 return 0;
2660
2661 r = sd_netlink_message_get_errno(m);
2662 if (r < 0) {
2663 log_link_message_warning_errno(link, m, r, error_msg);
2664 link_enter_failed(link);
2665 return 0;
2666 }
2667
2668 r = sd_netlink_message_get_type(m, &message_type);
2669 if (r < 0) {
2670 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2671 return 0;
2672 }
2673 if (message_type != RTM_NEWLINK) {
2674 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2675 return 0;
2676 }
2677
2678 r = link_update(link, m);
2679 if (r < 0) {
2680 link_enter_failed(link);
2681 return 0;
2682 }
2683
2684 return 1;
2685}
2686
2687int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2688 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2689 int r;
2690
2691 assert(link);
2692 assert(link->manager);
2693 assert(link->manager->rtnl);
2694 assert(callback);
2695
2696 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2697 if (r < 0)
2698 return r;
2699
2700 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2701 link_netlink_destroy_callback, link);
2702 if (r < 0)
2703 return r;
2704
2705 link_ref(link);
2706 return 0;
2707}
2708
fe8db0c5 2709static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2710 [LINK_STATE_PENDING] = "pending",
bd08ce56 2711 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2712 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2713 [LINK_STATE_CONFIGURED] = "configured",
2714 [LINK_STATE_UNMANAGED] = "unmanaged",
2715 [LINK_STATE_FAILED] = "failed",
2716 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2717};
2718
2719DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2720
2721int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2722 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2723 static const char* map[] = {
2724 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2725 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2726 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2727 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2728 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2729 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2730 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2731 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2732 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2733 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2734 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2735 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2736 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2737 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2738 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2739 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2740 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2741 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2742 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2743 };
2744
2745 assert(ret);
2746
2747 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2748 if (FLAGS_SET(flags, 1 << i) && map[i])
2749 if (!strextend_with_separator(&str, ",", map[i]))
2750 return -ENOMEM;
7ae55b78
YW		 2751
2752 *ret = TAKE_PTR(str);
2753 return 0;
2754}
2755
2756static const char * const kernel_operstate_table[] = {
2757 [IF_OPER_UNKNOWN] = "unknown",
2758 [IF_OPER_NOTPRESENT] = "not-present",
2759 [IF_OPER_DOWN] = "down",
2760 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2761 [IF_OPER_TESTING] = "testing",
2762 [IF_OPER_DORMANT] = "dormant",
2763 [IF_OPER_UP] = "up",
2764};
2765
2766DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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