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network/brvlan: make [BridgeVLAN] settings support an empty string
[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"
fc35a9f8 55#include "networkd-route-util.h"
3b6a3bde 56#include "networkd-route.h"
bce67bbe 57#include "networkd-routing-policy-rule.h"
0fa8ee6c 58#include "networkd-setlink.h"
19d9a5ad 59#include "networkd-sriov.h"
3b5a4fc6 60#include "networkd-state-file.h"
19d9a5ad 61#include "networkd-sysctl.h"
986b2514 62#include "networkd-wifi.h"
cf1d700d
TG		 63#include "set.h"
64#include "socket-util.h"
15a5e950 65#include "stdio-util.h"
8b43440b 66#include "string-table.h"
51517f9e 67#include "strv.h"
34658df2 68#include "tc.h"
e4de7287 69#include "tmpfile-util.h"
af7a86b8 70#include "tuntap.h"
299ad32d 71#include "udev-util.h"
737f1405 72#include "vrf.h"
fc2f9534 73
5e0534f1 74bool link_ipv6_enabled(Link *link) {
439689c6
SS		 75 assert(link);
76
77 if (!socket_ipv6_is_supported())
78 return false;
79
5fb5fae9 80 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 81 return false;
82
5fb5fae9
YW		 83 if (!link->network)
84 return false;
85
86 if (link->network->bond)
af9ba57a
YW		 87 return false;
88
bd7e0a3f 89 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 90 return true;
91
92 if (network_has_static_ipv6_configurations(link->network))
93 return true;
94
95 return false;
439689c6
SS		 96}
97
fc35a9f8
YW		 98bool link_has_ipv6_connectivity(Link *link) {
99 LinkAddressState ipv6_address_state;
100
101 assert(link);
102
103 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
104
105 switch (ipv6_address_state) {
106 case LINK_ADDRESS_STATE_ROUTABLE:
107 /* If the interface has a routable IPv6 address, then we assume yes. */
108 return true;
109
110 case LINK_ADDRESS_STATE_DEGRADED:
111 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
112 * there is an IPv6 default gateway. */
113 return link_has_default_gateway(link, AF_INET6);
114
115 case LINK_ADDRESS_STATE_OFF:
116 /* No IPv6 address. */
117 return false;
118
119 default:
120 assert_not_reached();
121 }
122}
123
e33232d4 124static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 125 assert(link);
126
d8d4db58
YW		 127 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
128 return false;
129
2fd3908b
YW		 130 if (!link->network)
131 return allow_unmanaged;
7191a57a 132
baa95d22
YW		 133 if (!link->network->configure_without_carrier) {
134 if (link->set_flags_messages > 0)
135 return false;
136
137 if (!link_has_carrier(link))
138 return false;
139 }
7191a57a 140
0fa8ee6c
YW		 141 if (link->set_link_messages > 0)
142 return false;
143
112a0972
YW		 144 if (!link->activated)
145 return false;
112a0972 146
7191a57a
YW		 147 return true;
148}
149
e33232d4
YW		 150bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
151 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
152}
153
15761549
YW		 154void link_ntp_settings_clear(Link *link) {
155 link->ntp = strv_free(link->ntp);
156}
157
158void link_dns_settings_clear(Link *link) {
f5fbe71d 159 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 160 for (unsigned i = 0; i < link->n_dns; i++)
161 in_addr_full_free(link->dns[i]);
15761549 162 link->dns = mfree(link->dns);
f5fbe71d 163 link->n_dns = UINT_MAX;
15761549 164
6e4571f0
YW		 165 link->search_domains = ordered_set_free(link->search_domains);
166 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 167
168 link->dns_default_route = -1;
169 link->llmnr = _RESOLVE_SUPPORT_INVALID;
170 link->mdns = _RESOLVE_SUPPORT_INVALID;
171 link->dnssec_mode = _DNSSEC_MODE_INVALID;
172 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
173
174 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
175}
176
1a6bb31f
YW		 177static void link_free_engines(Link *link) {
178 if (!link)
179 return;
180
181 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 182
1a6bb31f
YW		 183 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
184 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 185 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 186
35778343 187 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 188 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 189
5385e5f9
YW		 190 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
191
1a6bb31f 192 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 193
1a6bb31f 194 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 195 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 196
1a6bb31f 197 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 198 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
199 ndisc_flush(link);
200
1a6bb31f
YW		 201 link->radv = sd_radv_unref(link->radv);
202}
203
8301aa0b 204static Link *link_free(Link *link) {
8301aa0b 205 assert(link);
f579559b 206
15761549
YW		 207 link_ntp_settings_clear(link);
208 link_dns_settings_clear(link);
209
8eec0b9d 210 link->routes = set_free(link->routes);
8eec0b9d 211 link->nexthops = set_free(link->nexthops);
8eec0b9d 212 link->neighbors = set_free(link->neighbors);
8eec0b9d 213 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 214 link->qdiscs = set_free(link->qdiscs);
215 link->tclasses = set_free(link->tclasses);
adda1ed9 216
a27588d4 217 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 218
1a6bb31f 219 link_free_engines(link);
49699bac 220
b0ff6dea 221 set_free(link->sr_iov_virt_port_ifindices);
c166a070 222 free(link->ifname);
572b21d9 223 strv_free(link->alternative_names);
ceac4078 224 free(link->kind);
8d968fdd 225 free(link->ssid);
6706ce2f 226 free(link->previous_ssid);
c643bda5 227 free(link->driver);
6cad256d 228
a34e58d4
YW		 229 unlink_and_free(link->lease_file);
230 unlink_and_free(link->lldp_file);
231 unlink_and_free(link->state_file);
c166a070 232
8de56fb3 233 sd_device_unref(link->dev);
9aa2585e 234 netdev_unref(link->netdev);
b5db00e5 235
0d4ad91d 236 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 237 hashmap_free(link->bound_by_links);
238
5f707e12 239 set_free_with_destructor(link->slaves, link_unref);
033295c1 240
c9c908a6
YW		 241 network_unref(link->network);
242
6706ce2f
YW		 243 sd_event_source_disable_unref(link->carrier_lost_timer);
244
8301aa0b 245 return mfree(link);
14b746f7
TG		 246}
247
8301aa0b 248DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 249
6eab614d 250int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 251 Link *link;
11a7f229
TG		 252
253 assert(m);
e856ed00 254 assert(ifindex > 0);
11a7f229 255
6eab614d 256 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 257 if (!link)
258 return -ENODEV;
259
0b54c870
YW		 260 if (ret)
261 *ret = link;
262 return 0;
263}
264
265int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
266 Link *link;
267
268 assert(m);
269 assert(ifname);
11a7f229 270
0b54c870
YW		 271 link = hashmap_get(m->links_by_name, ifname);
272 if (!link)
273 return -ENODEV;
274
275 if (ret)
276 *ret = link;
11a7f229
TG		 277 return 0;
278}
279
fe321d45
YW		 280int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
281 Link *link;
282
283 assert(m);
284 assert(hw_addr);
285
286 link = hashmap_get(m->links_by_hw_addr, hw_addr);
287 if (!link)
288 return -ENODEV;
289
290 if (ret)
291 *ret = link;
292 return 0;
293}
294
81357285
YW		 295int link_get_master(Link *link, Link **ret) {
296 assert(link);
297 assert(link->manager);
298 assert(ret);
299
300 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
301 return -ENODEV;
302
6eab614d 303 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 304}
305
af9ba57a 306void link_set_state(Link *link, LinkState state) {
e331e246
TG		 307 assert(link);
308
309 if (link->state == state)
310 return;
311
0beb9542
YW		 312 log_link_debug(link, "State changed: %s -> %s",
313 link_state_to_string(link->state),
314 link_state_to_string(state));
315
e331e246
TG		 316 link->state = state;
317
318 link_send_changed(link, "AdministrativeState", NULL);
9092113d 319 link_dirty(link);
e331e246
TG		 320}
321
2a99eed0 322int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 323 int r = 0, k;
324
325 assert(link);
326 assert(link->manager);
327 assert(link->manager->event);
328
80060352
ZJS		 329 bool keep_dhcp = may_keep_dhcp &&
330 link->network &&
76a86ffd 331 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 332 (link->manager->restarting ||
333 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
334
84add3cd 335 if (!keep_dhcp) {
111bb8f9 336 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 337 if (k < 0)
36c7d709 338 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 339 }
340
2a99eed0
YW		 341 k = sd_dhcp_server_stop(link->dhcp_server);
342 if (k < 0)
343 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
344
35778343 345 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 346 if (k < 0)
c01b9b87
YW		 347 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
348
349 k = sd_lldp_tx_stop(link->lldp_tx);
350 if (k < 0)
351 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 352
84add3cd
YW		 353 k = sd_ipv4ll_stop(link->ipv4ll);
354 if (k < 0)
355 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 356
76a86ffd 357 k = ipv4acd_stop(link);
2488e4d9
YW		 358 if (k < 0)
359 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 360
84add3cd
YW		 361 k = sd_dhcp6_client_stop(link->dhcp6_client);
362 if (k < 0)
363 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 364
a27588d4 365 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 366 if (k < 0)
367 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 368
77302468 369 k = ndisc_stop(link);
84add3cd
YW		 370 if (k < 0)
371 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 372
259c65f3
YW		 373 ndisc_flush(link);
374
84add3cd
YW		 375 k = sd_radv_stop(link->radv);
376 if (k < 0)
377 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 378
111bb8f9
TG		 379 return r;
380}
381
b22d8a00 382void link_enter_failed(Link *link) {
ef1ba606 383 assert(link);
f882c247 384
370e9930 385 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 386 return;
387
6a7a4e4d 388 log_link_warning(link, "Failed");
449f7554 389
e331e246 390 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 391
2a99eed0 392 (void) link_stop_engines(link, false);
f882c247
TG		 393}
394
6accfd31
DA		 395void link_check_ready(Link *link) {
396 Address *a;
6accfd31
DA		 397
398 assert(link);
399
5f58af25
YW		 400 if (link->state == LINK_STATE_CONFIGURED)
401 return;
402
d19b9939
YW		 403 if (link->state != LINK_STATE_CONFIGURING)
404 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 405
406 if (!link->network)
a7f07cbe 407 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 408
7558f9e7
YW		 409 if (!link->tc_configured)
410 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 411
a7f07cbe
YW		 412 if (link->set_link_messages > 0)
413 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
414
415 if (!link->activated)
416 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
417
7558f9e7
YW		 418 if (link->iftype == ARPHRD_CAN) {
419 /* let's shortcut things for CAN which doesn't need most of checks below. */
420 link_set_state(link, LINK_STATE_CONFIGURED);
421 return;
422 }
423
879377ca
YW		 424 if (!link->stacked_netdevs_created)
425 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
426
76c5a0f2 427 if (!link->static_addresses_configured)
d19b9939 428 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 429
354bc760
YW		 430 if (!link->static_address_labels_configured)
431 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
432
e5b35bf6
YW		 433 if (!link->static_bridge_fdb_configured)
434 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
435
ff9e0783
YW		 436 if (!link->static_bridge_mdb_configured)
437 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
438
fdeba3f5
YW		 439 if (!link->static_ipv6_proxy_ndp_configured)
440 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
441
40ca350e
YW		 442 if (!link->static_neighbors_configured)
443 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
444
d19b9939
YW		 445 if (!link->static_nexthops_configured)
446 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 447
76c5a0f2
YW		 448 if (!link->static_routes_configured)
449 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
450
0e5ef6be 451 if (!link->static_routing_policy_rules_configured)
d19b9939 452 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 453
d19b9939
YW		 454 if (!link->sr_iov_configured)
455 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 456
4bcb8625
YW		 457 /* IPv6LL is assigned after the link gains its carrier. */
458 if (!link->network->configure_without_carrier &&
459 link_ipv6ll_enabled(link) &&
460 !in6_addr_is_set(&link->ipv6ll_address))
461 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
462
9e7d91ed
YW		 463 /* All static addresses must be ready. */
464 bool has_static_address = false;
465 SET_FOREACH(a, link->addresses) {
466 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
467 continue;
468 if (!address_is_ready(a))
469 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
470 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
471 has_static_address = true;
472 }
473
474 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
475 if (has_static_address)
476 goto ready;
477
5f950e56
YW		 478 /* If no dynamic addressing protocol enabled, assume the interface is ready.
479 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
480 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
481 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
482 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
483 goto ready;
484
485 bool ipv4ll_ready =
486 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
487 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
488 bool dhcp4_ready =
489 link_dhcp4_enabled(link) && link->dhcp4_configured &&
490 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
491 bool dhcp6_ready =
492 link_dhcp6_enabled(link) && link->dhcp6_configured &&
493 (!link->network->dhcp6_use_address ||
494 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
495 bool dhcp_pd_ready =
496 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
497 (!link->network->dhcp_pd_assign ||
498 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
499 bool ndisc_ready =
500 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
501 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
502 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
503
195b83ed
YW		 504 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
505 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
506 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 507 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
195b83ed
YW		 508 if (!dhcp4_ready)
509 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
510 if (!dhcp_pd_ready)
511 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
512 }
513
514 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 515 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
195b83ed
YW		 516 if (!dhcp6_ready)
517 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
518 if (!dhcp_pd_ready)
519 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
520 }
521 }
522
5f950e56
YW		 523 /* At least one dynamic addressing protocol is finished. */
524 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
525 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
526
527 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
528 __func__,
529 yes_no(ipv4ll_ready),
530 yes_no(dhcp4_ready),
531 yes_no(dhcp6_ready),
532 yes_no(dhcp_pd_ready),
533 yes_no(ndisc_ready));
534
535ready:
29836c16 536 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 537}
538
97108953 539static int link_request_static_configs(Link *link) {
f882c247
TG		 540 int r;
541
542 assert(link);
543 assert(link->network);
f5be5601 544 assert(link->state != _LINK_STATE_INVALID);
f882c247 545
354bc760 546 r = link_request_static_addresses(link);
0e5ef6be
YW		 547 if (r < 0)
548 return r;
549
354bc760 550 r = link_request_static_address_labels(link);
f3ef324d
YW		 551 if (r < 0)
552 return r;
e4a71bf3 553
e5b35bf6
YW		 554 r = link_request_static_bridge_fdb(link);
555 if (r < 0)
556 return r;
557
9a038aac
YW		 558 r = link_request_static_bridge_mdb(link);
559 if (r < 0)
560 return r;
561
fdeba3f5
YW		 562 r = link_request_static_ipv6_proxy_ndp_addresses(link);
563 if (r < 0)
564 return r;
565
40ca350e 566 r = link_request_static_neighbors(link);
682c65b0
YW		 567 if (r < 0)
568 return r;
bd6379ec 569
76c5a0f2 570 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 571 if (r < 0)
572 return r;
f882c247 573
76c5a0f2
YW		 574 r = link_request_static_routes(link, false);
575 if (r < 0)
576 return r;
577
578 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 579 if (r < 0)
580 return r;
d4cdbea5 581
f882c247
TG		 582 return 0;
583}
584
1187fc33
YW		 585static int link_request_stacked_netdevs(Link *link) {
586 NetDev *netdev;
e16e4b3b
DS		 587 int r;
588
589 assert(link);
590
1187fc33 591 link->stacked_netdevs_created = false;
e16e4b3b 592
1187fc33 593 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 594 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 595 if (r < 0)
596 return r;
597 }
e16e4b3b 598
bb916f35 599 if (link->create_stacked_netdev_messages == 0) {
1187fc33 600 link->stacked_netdevs_created = true;
bb916f35
YW		 601 link_check_ready(link);
602 }
e16e4b3b
DS		 603
604 return 0;
605}
606
8566df79 607static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 608 int r;
609
610 assert(link);
611
0f96a823
YW		 612 r = radv_start(link);
613 if (r < 0)
614 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 615
294f129b
YW		 616 r = ndisc_start(link);
617 if (r < 0)
618 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 619
294f129b
YW		 620 r = dhcp6_start(link);
621 if (r < 0)
622 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 623
e7ab854c
TG		 624 return 0;
625}
626
8566df79 627static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 628 int r;
629
630 assert(link);
ff254138
TG		 631 assert(link->manager);
632 assert(link->manager->event);
633
0107b769 634 if (link->dhcp_client) {
294f129b 635 r = dhcp4_start(link);
0107b769 636 if (r < 0)
294f129b 637 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 638
ccffa166 639 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 640
ccffa166 641 } else if (link->ipv4ll) {
59c27231
AK		 642 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
643 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
644 if (r < 0)
645 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
646 }
647
5c1d3fc9 648 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 649 if (r < 0)
650 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 651
652 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 653 }
654
ab486ef4
YW		 655 if (link->dhcp_server) {
656 r = sd_dhcp_server_start(link->dhcp_server);
657 if (r < 0)
658 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
659 }
660
76a86ffd
YW		 661 r = ipv4acd_start(link);
662 if (r < 0)
663 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
664
6fc25497
SS		 665 return 0;
666}
667
8566df79 668static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 669 int r;
670
671 assert(link);
0f96a823 672 assert(link->network);
6fc25497 673
8566df79 674 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 675 if (r < 0)
676 return r;
677
94876904 678 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 679 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 680 if (r < 0)
681 return r;
682 }
683
a27588d4 684 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 685 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
686 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
687 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
688 * below will be called in radv_start(). */
a27588d4 689 r = dhcp_request_prefix_delegation(link);
0f96a823 690 if (r < 0)
a27588d4 691 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 692 }
693
c01b9b87
YW		 694 if (link->lldp_tx) {
695 r = sd_lldp_tx_start(link->lldp_tx);
696 if (r < 0)
697 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
698 }
8e1ad1ea 699
35778343
YW		 700 if (link->lldp_rx) {
701 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 702 if (r < 0)
703 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
704 }
705
ff254138
TG		 706 return 0;
707}
708
7657ec3e 709int link_ipv6ll_gained(Link *link) {
0c9ee5d5 710 int r;
deb2e523 711
0c9ee5d5 712 assert(link);
deb2e523 713
0c9ee5d5 714 log_link_info(link, "Gained IPv6LL");
deb2e523 715
7657ec3e
YW		 716 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
717 return 0;
0c9ee5d5 718
7657ec3e
YW		 719 r = link_acquire_dynamic_ipv6_conf(link);
720 if (r < 0)
721 return r;
0c9ee5d5 722
7657ec3e 723 link_check_ready(link);
0c9ee5d5 724 return 0;
deb2e523
TG		 725}
726
112a0972 727int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 728 bool required_up = false;
729 bool link_is_up = false;
852a3916 730 Link *l;
0d4ad91d
AR		 731
732 assert(link);
733
ad82f0c3
YW		 734 /* If at least one interface in bound_to_links has carrier, then make this interface up.
735 * If all interfaces in bound_to_links do not, then make this interface down. */
736
0d4ad91d
AR		 737 if (hashmap_isempty(link->bound_to_links))
738 return 0;
739
740 if (link->flags & IFF_UP)
741 link_is_up = true;
742
852a3916 743 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 744 if (link_has_carrier(l)) {
745 required_up = true;
746 break;
747 }
748
852a3916 749 if (!required_up && link_is_up)
68f52063 750 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 751 if (required_up && !link_is_up)
68f52063 752 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 753
754 return 0;
755}
756
757static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 758 Link *l;
759 int r;
760
761 assert(link);
762
ad82f0c3
YW		 763 /* Update up or down state of interfaces which depend on this interface's carrier state. */
764
0d4ad91d
AR		 765 if (hashmap_isempty(link->bound_by_links))
766 return 0;
767
852a3916 768 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 769 r = link_handle_bound_to_list(l);
770 if (r < 0)
771 return r;
772 }
773
774 return 0;
775}
776
777static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
778 int r;
779
780 assert(link);
781 assert(carrier);
782
783 if (link == carrier)
784 return 0;
785
786 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
787 return 0;
788
190b3b5c 789 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 790 if (r < 0)
791 return r;
792
9092113d
YW		 793 link_dirty(link);
794
0d4ad91d
AR		 795 return 0;
796}
797
798static int link_new_bound_by_list(Link *link) {
799 Manager *m;
800 Link *carrier;
0d4ad91d 801 int r;
0d4ad91d
AR		 802
803 assert(link);
804 assert(link->manager);
805
806 m = link->manager;
807
6eab614d 808 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 809 if (!carrier->network)
810 continue;
811
812 if (strv_isempty(carrier->network->bind_carrier))
813 continue;
814
191a3f16 815 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 816 r = link_put_carrier(link, carrier, &link->bound_by_links);
817 if (r < 0)
818 return r;
0d4ad91d
AR		 819 }
820 }
821
90e74a66 822 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 823 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
824 if (r < 0)
825 return r;
0d4ad91d
AR		 826 }
827
828 return 0;
829}
830
831static int link_new_bound_to_list(Link *link) {
832 Manager *m;
833 Link *carrier;
0d4ad91d 834 int r;
0d4ad91d
AR		 835
836 assert(link);
837 assert(link->manager);
838
839 if (!link->network)
840 return 0;
841
842 if (strv_isempty(link->network->bind_carrier))
843 return 0;
844
845 m = link->manager;
846
6eab614d 847 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 848 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 849 r = link_put_carrier(link, carrier, &link->bound_to_links);
850 if (r < 0)
851 return r;
0d4ad91d
AR		 852 }
853 }
854
852a3916 855 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 856 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
857 if (r < 0)
858 return r;
0d4ad91d
AR		 859 }
860
861 return 0;
862}
863
0d4ad91d 864static void link_free_bound_to_list(Link *link) {
9092113d 865 bool updated = false;
0d4ad91d 866 Link *bound_to;
0d4ad91d 867
9092113d
YW		 868 assert(link);
869
870 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
871 updated = true;
0d4ad91d
AR		 872
873 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 874 link_dirty(bound_to);
0d4ad91d
AR		 875 }
876
9092113d
YW		 877 if (updated)
878 link_dirty(link);
0d4ad91d
AR		 879}
880
881static void link_free_bound_by_list(Link *link) {
9092113d 882 bool updated = false;
0d4ad91d 883 Link *bound_by;
0d4ad91d 884
9092113d
YW		 885 assert(link);
886
887 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
888 updated = true;
0d4ad91d
AR		 889
890 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 891 link_dirty(bound_by);
0d4ad91d
AR		 892 link_handle_bound_to_list(bound_by);
893 }
894 }
895
9092113d
YW		 896 if (updated)
897 link_dirty(link);
0d4ad91d
AR		 898}
899
81357285 900static int link_append_to_master(Link *link) {
5f707e12
YW		 901 Link *master;
902 int r;
903
904 assert(link);
5f707e12 905
81357285
YW		 906 /* - The link may have no master.
907 * - RTM_NEWLINK message about master interface may not be received yet. */
908 if (link_get_master(link, &master) < 0)
909 return 0;
5f707e12 910
de7fef4b 911 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 912 if (r <= 0)
5f707e12
YW		 913 return r;
914
915 link_ref(link);
916 return 0;
917}
918
81357285 919static void link_drop_from_master(Link *link) {
5f707e12
YW		 920 Link *master;
921
922 assert(link);
923
81357285 924 if (!link->manager)
5f707e12
YW		 925 return;
926
81357285 927 if (link_get_master(link, &master) < 0)
5f707e12
YW		 928 return;
929
930 link_unref(set_remove(master->slaves, link));
931}
932
56001f02
YW		 933static void link_drop_requests(Link *link) {
934 Request *req;
935
936 assert(link);
937 assert(link->manager);
938
939 ORDERED_SET_FOREACH(req, link->manager->request_queue)
940 if (req->link == link)
e26d3d40 941 request_detach(link->manager, req);
56001f02
YW		 942}
943
cc2d7efc 944static Link *link_drop(Link *link) {
63130eb3 945 if (!link)
cc2d7efc 946 return NULL;
0d4ad91d 947
63130eb3
YW		 948 assert(link->manager);
949
0d4ad91d
AR		 950 link_set_state(link, LINK_STATE_LINGER);
951
63130eb3
YW		 952 /* Drop all references from other links and manager. Note that async netlink calls may have
953 * references to the link, and they will be dropped when we receive replies. */
954
56001f02
YW		 955 link_drop_requests(link);
956
bb193d2d
YW		 957 link_free_bound_to_list(link);
958 link_free_bound_by_list(link);
0d4ad91d 959
b0ff6dea
YW		 960 link_clear_sr_iov_ifindices(link);
961
81357285 962 link_drop_from_master(link);
5f707e12 963
4c78dc17
YW		 964 if (link->state_file)
965 (void) unlink(link->state_file);
966
63130eb3
YW		 967 link_clean(link);
968
0b54c870
YW		 969 STRV_FOREACH(n, link->alternative_names)
970 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 971 hashmap_remove(link->manager->links_by_name, link->ifname);
972
fe321d45 973 /* bonding master and its slaves have the same hardware address. */
e74f1d07 974 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 975
63130eb3 976 /* The following must be called at last. */
6eab614d 977 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 978 return link_unref(link);
0d4ad91d
AR		 979}
980
5e5b137a 981static int link_drop_foreign_config(Link *link) {
1339b950 982 int r;
0b81225e
YW		 983
984 assert(link);
985 assert(link->manager);
5e5b137a 986
5e3bb5da
YW		 987 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
988 * to remove loopback address or addresses used for root NFS. */
989
990 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
991 return 0;
992 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
993 return 0;
994 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
995 return 0;
996
e36d601c 997 r = link_drop_foreign_routes(link);
5e5b137a 998
1339b950
ZJS		 999 RET_GATHER(r, link_drop_foreign_nexthops(link));
1000 RET_GATHER(r, link_drop_foreign_addresses(link));
1001 RET_GATHER(r, link_drop_foreign_neighbors(link));
1002 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW		 1003
1004 return r;
5e5b137a
TG		 1005}
1006
a0e99a37 1007static int link_drop_managed_config(Link *link) {
1339b950 1008 int r;
0b81225e
YW		 1009
1010 assert(link);
1011 assert(link->manager);
3104883d 1012
a0e99a37 1013 r = link_drop_managed_routes(link);
3104883d 1014
1339b950
ZJS		 1015 RET_GATHER(r, link_drop_managed_nexthops(link));
1016 RET_GATHER(r, link_drop_managed_addresses(link));
1017 RET_GATHER(r, link_drop_managed_neighbors(link));
1018 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 1019
0b81225e 1020 return r;
3104883d
SS		 1021}
1022
b4564f4e
YW		 1023static void link_foreignize_config(Link *link) {
1024 assert(link);
1025 assert(link->manager);
1026
1027 link_foreignize_routes(link);
1028 link_foreignize_nexthops(link);
1029 link_foreignize_addresses(link);
1030 link_foreignize_neighbors(link);
1031 link_foreignize_routing_policy_rules(link);
1032}
1033
c3b94251 1034static int link_configure(Link *link) {
4ecdcb07
YW		 1035 int r;
1036
ef1ba606 1037 assert(link);
b22d8a00 1038 assert(link->network);
bd08ce56 1039 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1040
1187fc33
YW		 1041 link_set_state(link, LINK_STATE_CONFIGURING);
1042
3cf58ef3
YW		 1043 r = link_new_bound_to_list(link);
1044 if (r < 0)
1045 return r;
1046
1dec9d81 1047 r = link_request_traffic_control(link);
4ecdcb07
YW		 1048 if (r < 0)
1049 return r;
1050
7558f9e7
YW		 1051 if (link->iftype == ARPHRD_CAN) {
1052 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1053 r = link_request_to_set_can(link);
1054 if (r < 0)
1055 return r;
1056
1057 return link_request_to_activate(link);
1058 }
1059
cb8453cc 1060 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1061 if (r < 0)
1062 return r;
1063
5e0534f1 1064 r = link_set_sysctl(link);
b69c3180
SS		 1065 if (r < 0)
1066 return r;
8749cbcd 1067
d05c332c 1068 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1069 if (r < 0)
1070 return r;
1071
72e65e6f
YW		 1072 r = link_request_to_set_ipoib(link);
1073 if (r < 0)
1074 return r;
1075
1187fc33 1076 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1077 if (r < 0)
1078 return r;
1079
1187fc33 1080 r = link_request_to_set_group(link);
99d2baa2
SS		 1081 if (r < 0)
1082 return r;
1083
1187fc33
YW		 1084 r = link_configure_mtu(link);
1085 if (r < 0)
1086 return r;
1087
1088 r = link_request_to_set_addrgen_mode(link);
1089 if (r < 0)
1090 return r;
1091
1092 r = link_request_to_set_master(link);
1093 if (r < 0)
1094 return r;
1095
1096 r = link_request_stacked_netdevs(link);
1097 if (r < 0)
1098 return r;
1099
1100 r = link_request_to_set_bond(link);
1101 if (r < 0)
1102 return r;
1103
1104 r = link_request_to_set_bridge(link);
1105 if (r < 0)
1106 return r;
1107
1108 r = link_request_to_set_bridge_vlan(link);
1109 if (r < 0)
1110 return r;
1111
1112 r = link_request_to_activate(link);
89fe6535
SS		 1113 if (r < 0)
1114 return r;
1115
2ffd6d73
YW		 1116 r = ipv4ll_configure(link);
1117 if (r < 0)
1118 return r;
64b21ece 1119
ccffa166 1120 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1121 if (r < 0)
1122 return r;
eb34d4af 1123
ccffa166 1124 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1125 if (r < 0)
1126 return r;
f5a8c43f 1127
ba4c7184 1128 r = link_request_ndisc(link);
2ffd6d73
YW		 1129 if (r < 0)
1130 return r;
4138fb2c 1131
1d28a3cf
YW		 1132 r = link_request_dhcp_server(link);
1133 if (r < 0)
1134 return r;
1135
a254fab2 1136 r = link_request_radv(link);
086b8853
YW		 1137 if (r < 0)
1138 return r;
7465dd22 1139
2ffd6d73
YW		 1140 r = link_lldp_rx_configure(link);
1141 if (r < 0)
1142 return r;
ce43e484 1143
c01b9b87
YW		 1144 r = link_lldp_tx_configure(link);
1145 if (r < 0)
1146 return r;
1147
5e3bb5da
YW		 1148 r = link_drop_foreign_config(link);
1149 if (r < 0)
1150 return r;
4c649652 1151
1187fc33
YW		 1152 r = link_request_static_configs(link);
1153 if (r < 0)
1154 return r;
1155
1156 if (!link_has_carrier(link))
1157 return 0;
1158
1159 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1160}
1161
170e88c8
YW		 1162static int link_get_network(Link *link, Network **ret) {
1163 Network *network;
1a3caa49 1164 int r;
170e88c8
YW		 1165
1166 assert(link);
1167 assert(link->manager);
1168 assert(ret);
1169
1170 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1171 bool warn = false;
1172
1a3caa49 1173 r = net_match_config(
170e88c8 1174 &network->match,
8de56fb3 1175 link->dev,
52135071
YW		 1176 &link->hw_addr,
1177 &link->permanent_hw_addr,
170e88c8
YW		 1178 link->driver,
1179 link->iftype,
65022cd7 1180 link->kind,
170e88c8
YW		 1181 link->ifname,
1182 link->alternative_names,
1183 link->wlan_iftype,
1184 link->ssid,
1a3caa49
YW		 1185 &link->bssid);
1186 if (r < 0)
1187 return r;
1188 if (r == 0)
170e88c8
YW		 1189 continue;
1190
8de56fb3 1191 if (network->match.ifname && link->dev) {
170e88c8
YW		 1192 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1193 const char *attr;
1194
8de56fb3 1195 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1196 (void) safe_atou8(attr, &name_assign_type);
1197
1198 warn = name_assign_type == NET_NAME_ENUM;
1199 }
1200
1201 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1202 "found matching network '%s'%s.",
1203 network->filename,
1204 warn ? ", based on potentially unpredictable interface name" : "");
1205
1206 if (network->unmanaged)
1207 return -ENOENT;
1208
1209 *ret = network;
1210 return 0;
1211 }
1212
1213 return -ENOENT;
1214}
1215
8a4ad01a 1216int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1217 Network *network = NULL;
9aa2585e 1218 NetDev *netdev = NULL;
ad932b15
YW		 1219 int r;
1220
5a1860f7 1221 assert(link);
572b21d9 1222
4faca0a3 1223 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1224 return 0;
1225
9aa2585e
YW		 1226 r = netdev_get(link->manager, link->ifname, &netdev);
1227 if (r < 0 && r != -ENOENT)
1228 return r;
1229
170e88c8 1230 r = link_get_network(link, &network);
cb71e9c6 1231 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1232 return r;
1233
fb961119
YW		 1234 if (link->state != LINK_STATE_UNMANAGED && !network)
1235 /* If link is in initialized state, then link->network is also NULL. */
1236 force = true;
1237
99b8517c 1238 if (link->network == network && !force)
ad932b15
YW		 1239 return 0;
1240
fb961119
YW		 1241 if (network) {
1242 if (link->state == LINK_STATE_INITIALIZED)
1243 log_link_info(link, "Configuring with %s.", network->filename);
1244 else
1245 log_link_info(link, "Reconfiguring with %s.", network->filename);
1246 } else
1247 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1248 "Unmanaging interface.");
ad932b15
YW		 1249
1250 /* Dropping old .network file */
2a99eed0 1251 r = link_stop_engines(link, false);
572b21d9 1252 if (r < 0)
ad932b15 1253 return r;
ad932b15 1254
19d9a5ad
YW		 1255 link_drop_requests(link);
1256
81db4f3d 1257 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1258 /* When a new/updated .network file is assigned, first make all configs (addresses,
1259 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1260 * link_drop_foreign_config() in link_configure().
1261 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1262 * here we need to drop the configs such as addresses, routes, and so on configured by
1263 * the previously assigned .network file. */
b4564f4e
YW		 1264 link_foreignize_config(link);
1265 else {
a0e99a37
YW		 1266 /* Remove all managed configs. Note, foreign configs are removed in later by
1267 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1268 r = link_drop_managed_config(link);
b4564f4e
YW		 1269 if (r < 0)
1270 return r;
1271 }
ad932b15 1272
3cf58ef3
YW		 1273 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1274 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1275 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1276 * map here, as it depends on .network files assigned to other links. */
1277 link_free_bound_to_list(link);
1278
ad932b15
YW		 1279 link_free_engines(link);
1280 link->network = network_unref(link->network);
1281
9aa2585e
YW		 1282 netdev_unref(link->netdev);
1283 link->netdev = netdev_ref(netdev);
1284
cb71e9c6
YW		 1285 if (!network) {
1286 link_set_state(link, LINK_STATE_UNMANAGED);
1287 return 0;
1288 }
1289
ad932b15 1290 /* Then, apply new .network file */
9092113d 1291 link->network = network_ref(network);
b156a95d 1292 link_update_operstate(link, true);
9092113d 1293 link_dirty(link);
ad932b15 1294
ad932b15 1295 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1296 link->activated = false;
ad932b15 1297
ad932b15
YW		 1298 r = link_configure(link);
1299 if (r < 0)
1300 return r;
1301
0e397560 1302 return 1;
ad932b15
YW		 1303}
1304
96f5f9ef 1305static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1306 int r;
1307
d09a179e
YW		 1308 assert(link);
1309
5a1860f7
YW		 1310 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1311 if (r <= 0)
1312 return r;
1313
7f80fa12 1314 r = link_reconfigure_impl(link, force);
d09a179e 1315 if (r < 0) {
572b21d9 1316 link_enter_failed(link);
d09a179e
YW		 1317 return 0;
1318 }
572b21d9 1319
d09a179e 1320 return r;
572b21d9
YW		 1321}
1322
5a1860f7 1323static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1324 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1325}
572b21d9 1326
5a1860f7 1327static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1328 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1329}
1330
a39a9ac8 1331int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1332 int r;
1333
1334 assert(link);
d09a179e 1335
8bceafa7 1336 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1337 * the function from being called multiple times simultaneously, refuse to reconfigure the
1338 * interface in these cases. */
8bceafa7 1339 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1340 return 0; /* 0 means no-op. */
2c0d7ed3 1341
a39a9ac8 1342 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1343 if (r < 0)
1344 return r;
1345
8bceafa7 1346 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1347}
1348
e6bf7774 1349static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1350 int r;
1351
1352 assert(link);
505f8da7
TG		 1353 assert(link->manager);
1354
faa2e64f
YW		 1355 if (link->manager->test_mode) {
1356 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1357 link_set_state(link, LINK_STATE_UNMANAGED);
1358 return 0;
1359 }
1360
40695457
YW		 1361 if (link->state == LINK_STATE_PENDING) {
1362 log_link_debug(link, "Link state is up-to-date");
1363 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1364
40695457
YW		 1365 r = link_new_bound_by_list(link);
1366 if (r < 0)
1367 return r;
0d4ad91d 1368
40695457
YW		 1369 r = link_handle_bound_by_list(link);
1370 if (r < 0)
1371 return r;
1372 }
0d4ad91d 1373
fb961119 1374 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1375}
1376
302a796f 1377static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1378 int r;
1379
5a1860f7
YW		 1380 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1381 if (r <= 0)
0b54c870 1382 return r;
572b21d9 1383
4ff296b0
YW		 1384 r = link_initialized_and_synced(link);
1385 if (r < 0)
1386 link_enter_failed(link);
5a1860f7
YW		 1387
1388 return 0;
e6bf7774
YW		 1389}
1390
3be9d62a 1391static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1392 int r;
1393
4f561e8e 1394 assert(link);
4f561e8e
TG		 1395 assert(device);
1396
160203e9
YW		 1397 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1398 * or sysattrs) may be outdated. */
8de56fb3 1399 device_unref_and_replace(link->dev, device);
4f561e8e 1400
3b1dbdf0
YW		 1401 if (link->dhcp_client) {
1402 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1403 if (r < 0)
1404 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1405 }
1406
1407 if (link->dhcp6_client) {
1408 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1409 if (r < 0)
1410 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1411 }
1412
b0ff6dea
YW		 1413 r = link_set_sr_iov_ifindices(link);
1414 if (r < 0)
1415 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1416
40695457
YW		 1417 if (link->state != LINK_STATE_PENDING)
1418 return link_reconfigure(link, /* force = */ false);
679b3605 1419
79008bdd 1420 log_link_debug(link, "udev initialized link");
4f561e8e 1421
3c9b8860
TG		 1422 /* udev has initialized the link, but we don't know if we have yet
1423 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1424 * when it returns we know that the pending NEWLINKs have already been
1425 * processed and that we are up-to-date */
4f561e8e 1426
5a1860f7 1427 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1428}
1429
0d411b7f 1430static int link_check_initialized(Link *link) {
51517f9e 1431 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1432 int r;
505f8da7 1433
0d411b7f 1434 assert(link);
505f8da7 1435
82f52245 1436 if (!udev_available())
0d411b7f 1437 return link_initialized_and_synced(link);
852a3916
YW		 1438
1439 /* udev should be around */
0ac655a6 1440 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1441 if (r < 0) {
1442 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1443 return 0;
1444 }
1445
1446 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1447 if (r < 0)
1448 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1449 if (r == 0) {
1450 /* not yet ready */
1451 log_link_debug(link, "link pending udev initialization...");
1452 return 0;
1453 }
1454
1455 r = device_is_renaming(device);
0d411b7f
YW		 1456 if (r < 0)
1457 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1458 if (r > 0) {
1459 log_link_debug(link, "Interface is being renamed, pending initialization.");
1460 return 0;
4f561e8e 1461 }
505f8da7 1462
0d411b7f 1463 return link_initialized(link, device);
a748b692
TG		 1464}
1465
1fd3ac1e 1466int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1467 int r, ifindex;
ba87a61d 1468 const char *s;
1fd3ac1e 1469 Link *link;
3be9d62a
YW		 1470
1471 assert(m);
1472 assert(device);
1473
3be9d62a 1474 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1475 if (r < 0)
1476 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1477
75255a8d
YW		 1478 r = link_get_by_index(m, ifindex, &link);
1479 if (r < 0) {
1480 /* This error is not critical, as the corresponding rtnl message may be received later. */
1481 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1482 return 0;
1483 }
1484
1485 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1486 * object here. It will be removed only when rtnetlink says so. */
1487 if (action == SD_DEVICE_REMOVE) {
1488 link->dev = sd_device_unref(link->dev);
1489 return 0;
1490 }
1491
3be9d62a 1492 r = device_is_renaming(device);
1fd3ac1e
YW		 1493 if (r < 0)
1494 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1495 if (r > 0) {
1fd3ac1e 1496 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1497 /* TODO:
1498 * What happens when a device is initialized, then soon renamed after that? When we detect
1499 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1500 return 0;
1501 }
1502
ba87a61d
YW		 1503 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1504 if (r < 0 && r != -ENOENT)
1505 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1506 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1507 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1508 link_set_state(link, LINK_STATE_UNMANAGED);
1509 return 0;
1510 }
1511
4b9a8c2b
YW		 1512 r = link_initialized(link, device);
1513 if (r < 0)
1514 link_enter_failed(link);
3be9d62a
YW		 1515
1516 return 0;
1517}
1518
9c0a72f9 1519static int link_carrier_gained(Link *link) {
6706ce2f 1520 bool force_reconfigure;
9c0a72f9
TG		 1521 int r;
1522
1523 assert(link);
1524
6706ce2f
YW		 1525 r = event_source_disable(link->carrier_lost_timer);
1526 if (r < 0)
1527 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1528
d9910948
YW		 1529 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1530 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1531 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1532 * restarted, and the correct network information will be gained.
1533 *
1534 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1535 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1536 * already assigned to the interface (in that case, the .network file does not have the SSID=
1537 * setting in the [Match] section), and the interface is already being configured. Of course,
1538 * there may exist another .network file with higher priority and a matching SSID= setting. But
1539 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1540 *
6706ce2f 1541 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1542 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1543 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1544 link->previous_ssid = mfree(link->previous_ssid);
1545
986b2514
AŠ		 1546 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1547 * profile wants to match on it with SSID= in its [Match] section.
1548 */
1549 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1550 r = link_get_wlan_interface(link);
1551 if (r < 0)
1552 return r;
1553 }
1554
081466bd
YW		 1555 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1556 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1557 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1558 r = link_reconfigure_impl(link, force_reconfigure);
1559 if (r != 0)
1560 return r;
b7ac1284 1561
aa9117c0
YW		 1562 r = link_handle_bound_by_list(link);
1563 if (r < 0)
1564 return r;
1565
600b7898
YW		 1566 if (link->iftype == ARPHRD_CAN)
1567 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1568 return 0;
600b7898 1569
b9ea3d2e 1570 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1571 r = link_acquire_dynamic_conf(link);
f0269653 1572 if (r < 0)
9c0a72f9 1573 return r;
6fc25497 1574
97108953 1575 r = link_request_static_configs(link);
6fc25497
SS		 1576 if (r < 0)
1577 return r;
9c0a72f9
TG		 1578 }
1579
aa9117c0 1580 return 0;
9c0a72f9
TG		 1581}
1582
6706ce2f
YW		 1583static int link_carrier_lost_impl(Link *link) {
1584 int r, ret = 0;
1585
1586 assert(link);
1587
1588 link->previous_ssid = mfree(link->previous_ssid);
1589
1590 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1591 return 0;
1592
1593 if (!link->network)
1594 return 0;
1595
1596 r = link_stop_engines(link, false);
1597 if (r < 0)
1598 ret = r;
1599
a0e99a37 1600 r = link_drop_managed_config(link);
6706ce2f
YW		 1601 if (r < 0 && ret >= 0)
1602 ret = r;
1603
1604 return ret;
1605}
1606
1607static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1608 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1609 int r;
1610
6706ce2f
YW		 1611 r = link_carrier_lost_impl(link);
1612 if (r < 0) {
1613 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1614 link_enter_failed(link);
1615 }
1616
1617 return 0;
1618}
1619
9c0a72f9 1620static int link_carrier_lost(Link *link) {
b7326069
YW		 1621 uint16_t dhcp_mtu;
1622 usec_t usec;
9c0a72f9
TG		 1623 int r;
1624
1625 assert(link);
1626
aa9117c0
YW		 1627 r = link_handle_bound_by_list(link);
1628 if (r < 0)
1629 return r;
93b4dab5 1630
600b7898
YW		 1631 if (link->iftype == ARPHRD_CAN)
1632 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1633 return 0;
1634
f1c22cf4
YW		 1635 if (!link->network)
1636 return 0;
1637
b7326069
YW		 1638 if (link->network->ignore_carrier_loss_set)
1639 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1640 usec = link->network->ignore_carrier_loss_usec;
1641
1642 else if (link->network->bond && link->wlan_iftype > 0)
1643 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1644 * carrier to be lost. See #19832. */
1645 usec = 3 * USEC_PER_SEC;
1646
1647 else if (link->network->dhcp_use_mtu &&
1648 link->dhcp_lease &&
1649 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1650 dhcp_mtu != link->original_mtu)
1651 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1652 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1653 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1654 usec = 5 * USEC_PER_SEC;
1655
1656 else
1657 /* Otherwise, use the currently set value. */
1658 usec = link->network->ignore_carrier_loss_usec;
1659
1660 if (usec == USEC_INFINITY)
aa9117c0 1661 return 0;
600b7898 1662
b7326069 1663 if (usec == 0)
6706ce2f
YW		 1664 return link_carrier_lost_impl(link);
1665
1666 return event_reset_time_relative(link->manager->event,
1667 &link->carrier_lost_timer,
ba4e0427 1668 CLOCK_BOOTTIME,
b7326069 1669 usec,
6706ce2f
YW		 1670 0,
1671 link_carrier_lost_handler,
1672 link,
1673 0,
1674 "link-carrier-loss",
1675 true);
0c9ee5d5
YW		 1676}
1677
0c9ee5d5
YW		 1678static int link_admin_state_up(Link *link) {
1679 int r;
1680
1681 assert(link);
1682
1683 /* This is called every time an interface admin state changes to up;
1684 * specifically, when IFF_UP flag changes from unset to set. */
1685
1686 if (!link->network)
1687 return 0;
1688
899b0e5e 1689 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1690 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1691 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1692 }
1693
1694 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1695 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1696 r = link_set_ipv6_mtu(link);
1697 if (r < 0)
1698 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1699
1700 return 0;
1701}
1702
1703static int link_admin_state_down(Link *link) {
1704 assert(link);
1705
1706 if (!link->network)
1707 return 0;
1708
899b0e5e 1709 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1710 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1711 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1712 }
1713
1714 return 0;
1715}
1716
0c9ee5d5
YW		 1717static bool link_is_enslaved(Link *link) {
1718 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1719 return true;
1720
1f024462 1721 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1722 return true;
1723
0c9ee5d5
YW		 1724 return false;
1725}
1726
0c9ee5d5
YW		 1727void link_update_operstate(Link *link, bool also_update_master) {
1728 LinkOperationalState operstate;
1729 LinkCarrierState carrier_state;
1730 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1731 LinkOnlineState online_state;
1732 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1733 bool changed = false;
0c9ee5d5
YW		 1734
1735 assert(link);
1736
1737 if (link->kernel_operstate == IF_OPER_DORMANT)
1738 carrier_state = LINK_CARRIER_STATE_DORMANT;
1739 else if (link_has_carrier(link)) {
1740 if (link_is_enslaved(link))
1741 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1742 else
1743 carrier_state = LINK_CARRIER_STATE_CARRIER;
1744 } else if (link->flags & IFF_UP)
1745 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1746 else
1747 carrier_state = LINK_CARRIER_STATE_OFF;
1748
1749 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1750 Link *slave;
1751
1752 SET_FOREACH(slave, link->slaves) {
1753 link_update_operstate(slave, false);
1754
1755 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1756 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1757 }
1758 }
1759
60415c13 1760 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 1761
1762 /* Mapping of address and carrier state vs operational state
1763 * carrier state
1764 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1765 * ------------------------------------------------------------------------------
1766 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1767 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1768 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1769 */
1770
cf4dbd84
HH		 1771 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1772 operstate = LINK_OPERSTATE_ROUTABLE;
1773 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1774 operstate = LINK_OPERSTATE_DEGRADED;
1775 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1776 operstate = (LinkOperationalState) carrier_state;
1777 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1778 operstate = LINK_OPERSTATE_ROUTABLE;
1779 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1780 operstate = LINK_OPERSTATE_DEGRADED;
1781 else
1782 operstate = LINK_OPERSTATE_ENSLAVED;
1783
1784 /* Only determine online state for managed links with RequiredForOnline=yes */
1785 if (!link->network || !link->network->required_for_online)
1786 online_state = _LINK_ONLINE_STATE_INVALID;
1787 else if (operstate < link->network->required_operstate_for_online.min ||
1788 operstate > link->network->required_operstate_for_online.max)
1789 online_state = LINK_ONLINE_STATE_OFFLINE;
1790 else {
1791 AddressFamily required_family = link->network->required_family_for_online;
1792 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1793 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1794
1795 /* The operational state is within the range required for online.
1796 * If a particular address family is also required, we might revert
1797 * to offline in the blocks below. */
1798 online_state = LINK_ONLINE_STATE_ONLINE;
1799
1800 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1801 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1802 online_state = LINK_ONLINE_STATE_OFFLINE;
1803 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1804 online_state = LINK_ONLINE_STATE_OFFLINE;
1805 }
1806
1807 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1808 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1809 online_state = LINK_ONLINE_STATE_OFFLINE;
1810 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1811 online_state = LINK_ONLINE_STATE_OFFLINE;
1812 }
1813 }
1814
1815 if (link->carrier_state != carrier_state) {
1816 link->carrier_state = carrier_state;
1817 changed = true;
1818 if (strv_extend(&p, "CarrierState") < 0)
1819 log_oom();
1820 }
1821
1822 if (link->address_state != address_state) {
1823 link->address_state = address_state;
1824 changed = true;
1825 if (strv_extend(&p, "AddressState") < 0)
1826 log_oom();
1827 }
0d4ad91d 1828
0c9ee5d5
YW		 1829 if (link->ipv4_address_state != ipv4_address_state) {
1830 link->ipv4_address_state = ipv4_address_state;
1831 changed = true;
1832 if (strv_extend(&p, "IPv4AddressState") < 0)
1833 log_oom();
1834 }
9c0a72f9 1835
0c9ee5d5
YW		 1836 if (link->ipv6_address_state != ipv6_address_state) {
1837 link->ipv6_address_state = ipv6_address_state;
1838 changed = true;
1839 if (strv_extend(&p, "IPv6AddressState") < 0)
1840 log_oom();
1841 }
9c0a72f9 1842
0c9ee5d5
YW		 1843 if (link->operstate != operstate) {
1844 link->operstate = operstate;
1845 changed = true;
1846 if (strv_extend(&p, "OperationalState") < 0)
1847 log_oom();
1848 }
9c0a72f9 1849
0c9ee5d5
YW		 1850 if (link->online_state != online_state) {
1851 link->online_state = online_state;
1852 changed = true;
1853 if (strv_extend(&p, "OnlineState") < 0)
1854 log_oom();
1855 }
9c0a72f9 1856
0c9ee5d5
YW		 1857 if (p)
1858 link_send_changed_strv(link, p);
1859 if (changed)
1860 link_dirty(link);
9c0a72f9 1861
0c9ee5d5
YW		 1862 if (also_update_master) {
1863 Link *master;
9c0a72f9 1864
0c9ee5d5
YW		 1865 if (link_get_master(link, &master) >= 0)
1866 link_update_operstate(master, true);
1867 }
9c0a72f9
TG		 1868}
1869
0c9ee5d5
YW		 1870#define FLAG_STRING(string, flag, old, new) \
1871 (((old ^ new) & flag) \
1872 ? ((old & flag) ? (" -" string) : (" +" string)) \
1873 : "")
1874
0d411b7f 1875static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1876 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1877 uint8_t operstate;
1878 unsigned flags;
d236718c
DS		 1879 int r;
1880
61135582 1881 assert(link);
0d411b7f 1882 assert(message);
61135582 1883
0d411b7f 1884 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1885 if (r < 0)
0d411b7f 1886 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1887
0d411b7f
YW		 1888 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1889 if (r == -ENODATA)
1890 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1891 operstate = link->kernel_operstate;
0d411b7f
YW		 1892 else if (r < 0)
1893 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1894
0d411b7f 1895 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1896 return 0;
1897
0c9ee5d5
YW		 1898 if (link->flags != flags) {
1899 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1900
0c9ee5d5
YW		 1901 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",
1902 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1903 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1904 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1905 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1906 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1907 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1908 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1909 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1910 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1911 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1912 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1913 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1914 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1915 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1916 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1917 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1918 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1919 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1920 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1921
0c9ee5d5
YW		 1922 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1923 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1924 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1925 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1926 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1927 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1928 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1929 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1930
0c9ee5d5
YW		 1931 if (unknown_flags_added)
1932 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1933
0c9ee5d5
YW		 1934 if (unknown_flags_removed)
1935 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1936 }
61135582 1937
0d411b7f
YW		 1938 link_was_admin_up = link->flags & IFF_UP;
1939 had_carrier = link_has_carrier(link);
1940
0c9ee5d5
YW		 1941 link->flags = flags;
1942 link->kernel_operstate = operstate;
36161cba 1943
0c9ee5d5 1944 link_update_operstate(link, true);
61135582 1945
0d411b7f
YW		 1946 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1947 log_link_info(link, "Link UP");
22936833 1948
0d411b7f
YW		 1949 r = link_admin_state_up(link);
1950 if (r < 0)
1951 return r;
1952 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1953 log_link_info(link, "Link DOWN");
0d4ad91d 1954
0d411b7f 1955 r = link_admin_state_down(link);
0d4ad91d
AR		 1956 if (r < 0)
1957 return r;
7619683b
TG		 1958 }
1959
0d411b7f
YW		 1960 if (!had_carrier && link_has_carrier(link)) {
1961 log_link_info(link, "Gained carrier");
0d4ad91d 1962
0d411b7f 1963 r = link_carrier_gained(link);
30de2b89
YW		 1964 if (r < 0)
1965 return r;
0d411b7f
YW		 1966 } else if (had_carrier && !link_has_carrier(link)) {
1967 log_link_info(link, "Lost carrier");
1968
1969 r = link_carrier_lost(link);
0b54c870
YW		 1970 if (r < 0)
1971 return r;
b8941f74
TG		 1972 }
1973
0d411b7f
YW		 1974 return 0;
1975}
afe7fd56 1976
0d411b7f
YW		 1977static int link_update_master(Link *link, sd_netlink_message *message) {
1978 int master_ifindex, r;
7465dd22 1979
0d411b7f
YW		 1980 assert(link);
1981 assert(message);
69629de9 1982
0d411b7f
YW		 1983 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1984 if (r == -ENODATA)
1985 return 0;
1986 if (r < 0)
1987 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1988
571bf1aa
YW		 1989 if (master_ifindex == link->ifindex)
1990 master_ifindex = 0;
1991
0d411b7f
YW		 1992 if (master_ifindex == link->master_ifindex)
1993 return 0;
807667f7 1994
0d411b7f 1995 if (link->master_ifindex == 0)
8458ca26 1996 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 1997 else if (master_ifindex == 0)
8458ca26 1998 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 1999 else
e2341b6b
DT		 2000 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2001 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2002
0d411b7f 2003 link_drop_from_master(link);
807667f7 2004
0d411b7f 2005 link->master_ifindex = master_ifindex;
413708d1 2006
0d411b7f
YW		 2007 r = link_append_to_master(link);
2008 if (r < 0)
2009 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2010
0d411b7f
YW		 2011 return 0;
2012}
807667f7 2013
e1658632
YW		 2014static int link_update_driver(Link *link, sd_netlink_message *message) {
2015 int r;
2016
2017 assert(link);
2018 assert(link->manager);
2019 assert(message);
2020
2021 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2022 if (link->ethtool_driver_read)
e1658632
YW		 2023 return 0;
2024
2025 /* When udevd is running, read the driver after the interface is initialized by udevd.
2026 * Otherwise, ethtool may not work correctly. See issue #22538.
2027 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2028 if (udev_available() && !link->dev)
e1658632
YW		 2029 return 0;
2030
6625c39e
YW		 2031 link->ethtool_driver_read = true;
2032
e1658632
YW		 2033 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2034 if (r < 0) {
2035 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2036 return 0;
2037 }
2038
2039 log_link_debug(link, "Found driver: %s", strna(link->driver));
2040
2041 if (streq_ptr(link->driver, "dsa")) {
2042 uint32_t dsa_master_ifindex = 0;
2043
2044 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2045 if (r < 0 && r != -ENODATA)
2046 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2047
2048 if (dsa_master_ifindex > INT_MAX) {
2049 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2050 dsa_master_ifindex);
2051 dsa_master_ifindex = 0;
2052 }
2053
2054 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2055 }
2056
40695457 2057 return 1; /* needs reconfigure */
e1658632
YW		 2058}
2059
6625c39e 2060static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2061 int r;
2062
2063 assert(link);
2064 assert(link->manager);
2065 assert(message);
2066
6625c39e 2067 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2068 return 0;
2069
2070 /* When udevd is running, read the permanent hardware address after the interface is
2071 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2072 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2073 if (udev_available() && !link->dev)
2074 return 0;
2075
2076 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2077 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2078 if (r == -ENODATA)
2079 return 0;
2080 if (r < 0)
2081 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2082
2083 link->ethtool_permanent_hw_addr_read = true;
2084
2085 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2086 if (r < 0)
2087 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2088
2089 return 0;
2090}
2091
2092static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2093 int r;
2094
2095 assert(link);
2096 assert(link->manager);
2097 assert(message);
2098
2099 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2100 return 0;
2101
2102 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2103 if (r < 0) {
2104 if (r != -ENODATA)
2105 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2106
6625c39e
YW		 2107 /* Fallback to ethtool for older kernels. */
2108 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2109 if (r < 0)
2110 return r;
e1658632
YW		 2111 }
2112
2113 if (link->permanent_hw_addr.length > 0)
2114 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2115
40695457 2116 return 1; /* needs reconfigure */
e1658632
YW		 2117}
2118
0d411b7f 2119static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2120 struct hw_addr_data addr;
0d411b7f 2121 int r;
d93d655c 2122
0d411b7f
YW		 2123 assert(link);
2124 assert(message);
dfc58b47 2125
0d411b7f
YW		 2126 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2127 if (r < 0 && r != -ENODATA)
2128 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2129
e2bacccd 2130 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2131 if (r == -ENODATA)
2132 return 0;
2133 if (r < 0)
fe321d45 2134 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2135
e2bacccd 2136 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2137 return 0;
a61bb41c 2138
de0f1579 2139 if (link->hw_addr.length == 0)
e2bacccd 2140 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2141 else {
e2341b6b
DT		 2142 log_link_debug(link, "Hardware address is changed: %s %s %s",
2143 HW_ADDR_TO_STR(&link->hw_addr),
2144 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2145 HW_ADDR_TO_STR(&addr));
0d411b7f 2146
e74f1d07 2147 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2148 }
2149
e2bacccd
YW		 2150 link->hw_addr = addr;
2151
fe321d45
YW		 2152 if (!hw_addr_is_null(&link->hw_addr)) {
2153 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2154 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2155 /* bonding master and its slaves have the same hardware address. */
2156 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2157 if (r < 0)
2158 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2159 }
0d411b7f 2160
0a14f83a 2161 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2162 if (r < 0)
2163 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2164
0d411b7f 2165 r = ipv4ll_update_mac(link);
a61bb41c 2166 if (r < 0)
0d411b7f 2167 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2168
0d411b7f
YW		 2169 r = dhcp4_update_mac(link);
2170 if (r < 0)
2171 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2172
0d411b7f
YW		 2173 r = dhcp6_update_mac(link);
2174 if (r < 0)
2175 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2176
2177 r = radv_update_mac(link);
2178 if (r < 0)
2179 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2180
3be64aa4 2181 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2182 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2183 if (r < 0)
0d411b7f
YW		 2184 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2185 }
d236718c 2186
35778343
YW		 2187 if (link->lldp_rx) {
2188 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2189 if (r < 0)
c01b9b87
YW		 2190 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2191 }
2192
2193 if (link->lldp_tx) {
2194 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2195 if (r < 0)
2196 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2197 }
2198
40695457 2199 return 1; /* needs reconfigure */
0d411b7f 2200}
a61bb41c 2201
0d411b7f 2202static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2203 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2204 int r;
a61bb41c 2205
0d411b7f
YW		 2206 assert(link);
2207 assert(message);
2208
2209 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2210 if (r == -ENODATA)
2211 return 0;
2212 if (r < 0)
2213 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2214 if (mtu == 0)
2215 return 0;
0d411b7f 2216
717ba5fc
YW		 2217 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2218 if (r < 0 && r != -ENODATA)
2219 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2220
2221 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2222 if (r < 0 && r != -ENODATA)
2223 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2224
717ba5fc
YW		 2225 if (max_mtu == 0)
2226 max_mtu = UINT32_MAX;
2227
2228 link->min_mtu = min_mtu;
2229 link->max_mtu = max_mtu;
2230
0d411b7f
YW		 2231 if (link->original_mtu == 0) {
2232 link->original_mtu = mtu;
717ba5fc
YW		 2233 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2234 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2235 }
2236
717ba5fc
YW		 2237 if (link->mtu == mtu)
2238 return 0;
2239
b5d0fd1e 2240 if (link->mtu != 0)
e2341b6b
DT		 2241 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2242 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2243 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2244
2245 link->mtu = mtu;
2246
2247 if (link->dhcp_client) {
2248 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2249 if (r < 0)
0d411b7f
YW		 2250 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2251 }
a61bb41c 2252
0d411b7f
YW		 2253 if (link->radv) {
2254 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2255 if (r < 0)
0d411b7f 2256 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2257 }
2258
2259 return 0;
dd3efc09 2260}
fe8db0c5 2261
0d411b7f
YW		 2262static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2263 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2264 int r;
2265
2266 assert(link);
2267 assert(message);
2268
2269 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2270 if (r == -ENODATA)
2368ff81 2271 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2272 * interface has no alternative name. */
2273 return 0;
2274 if (r < 0)
0d411b7f
YW		 2275 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2276
1b345c1e
YW		 2277 if (strv_equal(altnames, link->alternative_names))
2278 return 0;
2279
0d411b7f
YW		 2280 STRV_FOREACH(n, link->alternative_names)
2281 hashmap_remove(link->manager->links_by_name, *n);
2282
2283 strv_free_and_replace(link->alternative_names, altnames);
2284
2285 STRV_FOREACH(n, link->alternative_names) {
2286 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2287 if (r < 0)
2288 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2289 }
2290
40695457 2291 return 1; /* needs reconfigure */
0d411b7f
YW		 2292}
2293
2294static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2295 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2296 const char *ifname;
2297 int r;
2298
2299 assert(link);
2300 assert(message);
2301
2302 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2303 if (r == -ENODATA)
7802194a 2304 /* Hmm?? But ok. */
0d411b7f
YW		 2305 return 0;
2306 if (r < 0)
2307 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2308
2309 if (streq(ifname, link->ifname))
2310 return 0;
2311
01afd0f7
YW		 2312 r = format_ifname(link->ifindex, ifname_from_index);
2313 if (r < 0)
2314 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2315
2316 if (!streq(ifname, ifname_from_index)) {
2317 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2318 "with the name currently configured on the actual interface '%s'. Ignoring.",
2319 ifname, ifname_from_index);
2320 return 0;
2321 }
2322
0d411b7f
YW		 2323 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2324
2325 hashmap_remove(link->manager->links_by_name, link->ifname);
2326
2327 r = free_and_strdup(&link->ifname, ifname);
2328 if (r < 0)
2329 return log_oom_debug();
2330
2331 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2332 if (r < 0)
2333 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2334
54d1fdb2
YW		 2335 if (link->dhcp_client) {
2336 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2337 if (r < 0)
2338 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2339 }
2340
2341 if (link->dhcp6_client) {
2342 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2343 if (r < 0)
2344 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2345 }
2346
2347 if (link->ndisc) {
2348 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2349 if (r < 0)
2350 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2351 }
2352
2353 if (link->dhcp_server) {
2354 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2355 if (r < 0)
2356 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2357 }
2358
2359 if (link->radv) {
2360 r = sd_radv_set_ifname(link->radv, link->ifname);
2361 if (r < 0)
2362 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2363 }
2364
35778343
YW		 2365 if (link->lldp_rx) {
2366 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2367 if (r < 0)
c01b9b87
YW		 2368 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2369 }
2370
2371 if (link->lldp_tx) {
2372 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2373 if (r < 0)
2374 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2375 }
2376
2377 if (link->ipv4ll) {
2378 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2379 if (r < 0)
2380 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2381 }
2382
86173383
YW		 2383 r = ipv4acd_set_ifname(link);
2384 if (r < 0)
2385 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2386
40695457 2387 return 1; /* needs reconfigure */
0d411b7f
YW		 2388}
2389
2390static int link_update(Link *link, sd_netlink_message *message) {
40695457 2391 bool needs_reconfigure = false;
0d411b7f
YW		 2392 int r;
2393
2394 assert(link);
2395 assert(message);
2396
2397 r = link_update_name(link, message);
2398 if (r < 0)
2399 return r;
40695457 2400 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2401
2402 r = link_update_alternative_names(link, message);
2403 if (r < 0)
2404 return r;
40695457 2405 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2406
2407 r = link_update_mtu(link, message);
2408 if (r < 0)
2409 return r;
2410
e1658632
YW		 2411 r = link_update_driver(link, message);
2412 if (r < 0)
2413 return r;
40695457 2414 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2415
2416 r = link_update_permanent_hardware_address(link, message);
2417 if (r < 0)
2418 return r;
40695457 2419 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2420
0d411b7f
YW		 2421 r = link_update_hardware_address(link, message);
2422 if (r < 0)
2423 return r;
40695457 2424 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2425
2426 r = link_update_master(link, message);
2427 if (r < 0)
2428 return r;
2429
7d0d832d
YW		 2430 r = link_update_ipv6ll_addrgen_mode(link, message);
2431 if (r < 0)
2432 return r;
2433
40695457
YW		 2434 r = link_update_flags(link, message);
2435 if (r < 0)
2436 return r;
2437
2438 return needs_reconfigure;
0d411b7f
YW		 2439}
2440
0c9ee5d5
YW		 2441static Link *link_drop_or_unref(Link *link) {
2442 if (!link)
2443 return NULL;
2444 if (!link->manager)
2445 return link_unref(link);
2446 return link_drop(link);
2447}
2448
2449DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2450
2451static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2452 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2453 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2454 unsigned short iftype;
2455 int r, ifindex;
0c9ee5d5
YW		 2456
2457 assert(manager);
2458 assert(message);
2459 assert(ret);
2460
0c9ee5d5
YW		 2461 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2462 if (r < 0)
0d411b7f 2463 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2464 else if (ifindex <= 0)
0d411b7f 2465 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2466
2467 r = sd_rtnl_message_link_get_type(message, &iftype);
2468 if (r < 0)
0d411b7f 2469 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2470
2471 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2472 if (r < 0)
0d411b7f 2473 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2474
2475 /* check for link kind */
2476 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2477 if (r >= 0) {
0d411b7f
YW		 2478 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2479 if (r < 0 && r != -ENODATA)
2480 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2481 r = sd_netlink_message_exit_container(message);
2482 if (r < 0)
0d411b7f 2483 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2484 }
2485
4c78dc17
YW		 2486 if (!manager->test_mode) {
2487 /* Do not update state files when running in test mode. */
2488 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2489 return log_oom_debug();
0d411b7f 2490
4c78dc17
YW		 2491 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2492 return log_oom_debug();
0d411b7f 2493
4c78dc17
YW		 2494 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2495 return log_oom_debug();
2496 }
0d411b7f 2497
0c9ee5d5
YW		 2498 link = new(Link, 1);
2499 if (!link)
2500 return -ENOMEM;
2501
2502 *link = (Link) {
2503 .n_ref = 1,
2504 .state = LINK_STATE_PENDING,
2505 .online_state = _LINK_ONLINE_STATE_INVALID,
2506 .ifindex = ifindex,
2507 .iftype = iftype,
2508 .ifname = TAKE_PTR(ifname),
2509 .kind = TAKE_PTR(kind),
2510
7d0d832d
YW		 2511 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2512
0d411b7f
YW		 2513 .state_file = TAKE_PTR(state_file),
2514 .lease_file = TAKE_PTR(lease_file),
2515 .lldp_file = TAKE_PTR(lldp_file),
2516
0c9ee5d5
YW		 2517 .n_dns = UINT_MAX,
2518 .dns_default_route = -1,
2519 .llmnr = _RESOLVE_SUPPORT_INVALID,
2520 .mdns = _RESOLVE_SUPPORT_INVALID,
2521 .dnssec_mode = _DNSSEC_MODE_INVALID,
2522 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2523 };
2524
6eab614d 2525 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2526 if (r < 0)
0d411b7f 2527 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2528
2529 link->manager = manager;
2530
0d411b7f 2531 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2532 if (r < 0)
0d411b7f 2533 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2534
8a77e245
YW		 2535 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2536 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2537
9c5b8d46
AŠ		 2538 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2539 * message arrived too early. Request the wireless link information again.
2540 */
2541 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2542 r = link_get_wlan_interface(link);
2543 if (r < 0)
2544 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2545 }
2546
0c9ee5d5 2547 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2548 return 0;
2549}
2550
0d411b7f 2551int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2552 Link *link = NULL;
2553 NetDev *netdev = NULL;
2554 uint16_t type;
2555 const char *name;
2556 int r, ifindex;
2557
2558 assert(rtnl);
2559 assert(message);
0d411b7f 2560 assert(manager);
3be9d62a
YW		 2561
2562 if (sd_netlink_message_is_error(message)) {
2563 r = sd_netlink_message_get_errno(message);
2564 if (r < 0)
2565 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2566
2567 return 0;
2568 }
2569
2570 r = sd_netlink_message_get_type(message, &type);
2571 if (r < 0) {
2572 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2573 return 0;
2574 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2575 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2576 return 0;
2577 }
2578
2579 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2580 if (r < 0) {
2581 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2582 return 0;
2583 } else if (ifindex <= 0) {
2584 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2585 return 0;
2586 }
2587
2588 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2589 if (r < 0) {
2590 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2591 return 0;
2592 }
2593
6eab614d 2594 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2595 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2596
2597 switch (type) {
2598 case RTM_NEWLINK:
0d411b7f
YW		 2599 if (netdev) {
2600 /* netdev exists, so make sure the ifindex matches */
2601 r = netdev_set_ifindex(netdev, message);
2602 if (r < 0) {
66141164 2603 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2604 return 0;
2605 }
2606 }
2607
3be9d62a
YW		 2608 if (!link) {
2609 /* link is new, so add it */
0d411b7f 2610 r = link_new(manager, message, &link);
3be9d62a 2611 if (r < 0) {
0d411b7f 2612 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2613 return 0;
2614 }
3be9d62a 2615
0d411b7f 2616 r = link_update(link, message);
3be9d62a 2617 if (r < 0) {
66141164 2618 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2619 link_enter_failed(link);
3be9d62a
YW		 2620 return 0;
2621 }
3be9d62a 2622
0d411b7f
YW		 2623 r = link_check_initialized(link);
2624 if (r < 0) {
66141164 2625 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2626 link_enter_failed(link);
2627 return 0;
2628 }
2629 } else {
2630 r = link_update(link, message);
2631 if (r < 0) {
66141164 2632 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2633 link_enter_failed(link);
2634 return 0;
2635 }
40695457
YW		 2636 if (r > 0) {
2637 r = link_reconfigure_impl(link, /* force = */ false);
2638 if (r < 0) {
2639 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2640 link_enter_failed(link);
2641 return 0;
2642 }
2643 }
3be9d62a 2644 }
3be9d62a
YW		 2645 break;
2646
2647 case RTM_DELLINK:
2648 link_drop(link);
2649 netdev_drop(netdev);
3be9d62a
YW		 2650 break;
2651
2652 default:
04499a70 2653 assert_not_reached();
3be9d62a
YW		 2654 }
2655
2656 return 1;
2657}
2658
79c6e114
YW		 2659int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2660 uint16_t message_type;
2661 int r;
2662
2663 assert(m);
2664 assert(link);
2665 assert(error_msg);
2666
2667 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2668 return 0;
2669
2670 r = sd_netlink_message_get_errno(m);
2671 if (r < 0) {
2672 log_link_message_warning_errno(link, m, r, error_msg);
2673 link_enter_failed(link);
2674 return 0;
2675 }
2676
2677 r = sd_netlink_message_get_type(m, &message_type);
2678 if (r < 0) {
2679 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2680 return 0;
2681 }
2682 if (message_type != RTM_NEWLINK) {
2683 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2684 return 0;
2685 }
2686
2687 r = link_update(link, m);
2688 if (r < 0) {
2689 link_enter_failed(link);
2690 return 0;
2691 }
2692
2693 return 1;
2694}
2695
2696int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2697 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2698 int r;
2699
2700 assert(link);
2701 assert(link->manager);
2702 assert(link->manager->rtnl);
2703 assert(callback);
2704
2705 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2706 if (r < 0)
2707 return r;
2708
2709 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2710 link_netlink_destroy_callback, link);
2711 if (r < 0)
2712 return r;
2713
2714 link_ref(link);
2715 return 0;
2716}
2717
fe8db0c5 2718static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2719 [LINK_STATE_PENDING] = "pending",
bd08ce56 2720 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2721 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2722 [LINK_STATE_CONFIGURED] = "configured",
2723 [LINK_STATE_UNMANAGED] = "unmanaged",
2724 [LINK_STATE_FAILED] = "failed",
2725 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2726};
2727
2728DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2729
2730int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2731 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2732 static const char* map[] = {
2733 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2734 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2735 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2736 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2737 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2738 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2739 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2740 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2741 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2742 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2743 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2744 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2745 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2746 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2747 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2748 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2749 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2750 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2751 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2752 };
2753
2754 assert(ret);
2755
2756 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2757 if (FLAGS_SET(flags, 1 << i) && map[i])
2758 if (!strextend_with_separator(&str, ",", map[i]))
2759 return -ENOMEM;
7ae55b78
YW		 2760
2761 *ret = TAKE_PTR(str);
2762 return 0;
2763}
2764
2765static const char * const kernel_operstate_table[] = {
2766 [IF_OPER_UNKNOWN] = "unknown",
2767 [IF_OPER_NOTPRESENT] = "not-present",
2768 [IF_OPER_DOWN] = "down",
2769 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2770 [IF_OPER_TESTING] = "testing",
2771 [IF_OPER_DORMANT] = "dormant",
2772 [IF_OPER_UP] = "up",
2773};
2774
2775DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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