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[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"
11cee6ef 38#include "networkd-bridge-vlan.h"
3ddcbeea 39#include "networkd-can.h"
d5ebcf65 40#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 41#include "networkd-dhcp-server.h"
ca5ad760
YW		 42#include "networkd-dhcp4.h"
43#include "networkd-dhcp6.h"
76a86ffd 44#include "networkd-ipv4acd.h"
ca5ad760 45#include "networkd-ipv4ll.h"
76c5a0f2 46#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 47#include "networkd-link-bus.h"
48#include "networkd-link.h"
8e1ad1ea 49#include "networkd-lldp-tx.h"
23f53b99 50#include "networkd-manager.h"
1e7a0e21 51#include "networkd-ndisc.h"
e4a71bf3 52#include "networkd-neighbor.h"
75156ccb 53#include "networkd-nexthop.h"
19d9a5ad 54#include "networkd-queue.h"
7465dd22 55#include "networkd-radv.h"
fc35a9f8 56#include "networkd-route-util.h"
3b6a3bde 57#include "networkd-route.h"
bce67bbe 58#include "networkd-routing-policy-rule.h"
0fa8ee6c 59#include "networkd-setlink.h"
19d9a5ad 60#include "networkd-sriov.h"
3b5a4fc6 61#include "networkd-state-file.h"
19d9a5ad 62#include "networkd-sysctl.h"
986b2514 63#include "networkd-wifi.h"
cf1d700d
TG		 64#include "set.h"
65#include "socket-util.h"
15a5e950 66#include "stdio-util.h"
8b43440b 67#include "string-table.h"
51517f9e 68#include "strv.h"
34658df2 69#include "tc.h"
e4de7287 70#include "tmpfile-util.h"
af7a86b8 71#include "tuntap.h"
299ad32d 72#include "udev-util.h"
737f1405 73#include "vrf.h"
fc2f9534 74
5e0534f1 75bool link_ipv6_enabled(Link *link) {
439689c6
SS		 76 assert(link);
77
78 if (!socket_ipv6_is_supported())
79 return false;
80
5fb5fae9 81 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 82 return false;
83
5fb5fae9
YW		 84 if (!link->network)
85 return false;
86
87 if (link->network->bond)
af9ba57a
YW		 88 return false;
89
bd7e0a3f 90 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 91 return true;
92
93 if (network_has_static_ipv6_configurations(link->network))
94 return true;
95
96 return false;
439689c6
SS		 97}
98
fc35a9f8
YW		 99bool link_has_ipv6_connectivity(Link *link) {
100 LinkAddressState ipv6_address_state;
101
102 assert(link);
103
104 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
105
106 switch (ipv6_address_state) {
107 case LINK_ADDRESS_STATE_ROUTABLE:
108 /* If the interface has a routable IPv6 address, then we assume yes. */
109 return true;
110
111 case LINK_ADDRESS_STATE_DEGRADED:
112 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
113 * there is an IPv6 default gateway. */
114 return link_has_default_gateway(link, AF_INET6);
115
116 case LINK_ADDRESS_STATE_OFF:
117 /* No IPv6 address. */
118 return false;
119
120 default:
121 assert_not_reached();
122 }
123}
124
e33232d4 125static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 126 assert(link);
127
d8d4db58
YW		 128 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
129 return false;
130
2fd3908b
YW		 131 if (!link->network)
132 return allow_unmanaged;
7191a57a 133
baa95d22
YW		 134 if (!link->network->configure_without_carrier) {
135 if (link->set_flags_messages > 0)
136 return false;
137
138 if (!link_has_carrier(link))
139 return false;
140 }
7191a57a 141
0fa8ee6c
YW		 142 if (link->set_link_messages > 0)
143 return false;
144
112a0972
YW		 145 if (!link->activated)
146 return false;
112a0972 147
7191a57a
YW		 148 return true;
149}
150
e33232d4
YW		 151bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
152 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
153}
154
15761549
YW		 155void link_ntp_settings_clear(Link *link) {
156 link->ntp = strv_free(link->ntp);
157}
158
159void link_dns_settings_clear(Link *link) {
f5fbe71d 160 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 161 for (unsigned i = 0; i < link->n_dns; i++)
162 in_addr_full_free(link->dns[i]);
15761549 163 link->dns = mfree(link->dns);
f5fbe71d 164 link->n_dns = UINT_MAX;
15761549 165
6e4571f0
YW		 166 link->search_domains = ordered_set_free(link->search_domains);
167 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 168
169 link->dns_default_route = -1;
170 link->llmnr = _RESOLVE_SUPPORT_INVALID;
171 link->mdns = _RESOLVE_SUPPORT_INVALID;
172 link->dnssec_mode = _DNSSEC_MODE_INVALID;
173 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
174
175 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
176}
177
1a6bb31f
YW		 178static void link_free_engines(Link *link) {
179 if (!link)
180 return;
181
182 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 183
1a6bb31f
YW		 184 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
185 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 186 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 187
35778343 188 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 189 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 190
5385e5f9
YW		 191 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
192
1a6bb31f 193 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 194
1a6bb31f 195 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 196 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 197
1a6bb31f 198 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 199 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
200 ndisc_flush(link);
201
1a6bb31f
YW		 202 link->radv = sd_radv_unref(link->radv);
203}
204
8301aa0b 205static Link *link_free(Link *link) {
8301aa0b 206 assert(link);
f579559b 207
15761549
YW		 208 link_ntp_settings_clear(link);
209 link_dns_settings_clear(link);
210
8eec0b9d 211 link->routes = set_free(link->routes);
8eec0b9d 212 link->nexthops = set_free(link->nexthops);
8eec0b9d 213 link->neighbors = set_free(link->neighbors);
8eec0b9d 214 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 215 link->qdiscs = set_free(link->qdiscs);
216 link->tclasses = set_free(link->tclasses);
adda1ed9 217
a27588d4 218 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 219
1a6bb31f 220 link_free_engines(link);
49699bac 221
b0ff6dea 222 set_free(link->sr_iov_virt_port_ifindices);
c166a070 223 free(link->ifname);
572b21d9 224 strv_free(link->alternative_names);
ceac4078 225 free(link->kind);
8d968fdd 226 free(link->ssid);
6706ce2f 227 free(link->previous_ssid);
c643bda5 228 free(link->driver);
6cad256d 229
a34e58d4
YW		 230 unlink_and_free(link->lease_file);
231 unlink_and_free(link->lldp_file);
232 unlink_and_free(link->state_file);
c166a070 233
8de56fb3 234 sd_device_unref(link->dev);
9aa2585e 235 netdev_unref(link->netdev);
b5db00e5 236
0d4ad91d 237 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 238 hashmap_free(link->bound_by_links);
239
5f707e12 240 set_free_with_destructor(link->slaves, link_unref);
033295c1 241
c9c908a6
YW		 242 network_unref(link->network);
243
6706ce2f
YW		 244 sd_event_source_disable_unref(link->carrier_lost_timer);
245
8301aa0b 246 return mfree(link);
14b746f7
TG		 247}
248
8301aa0b 249DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 250
6eab614d 251int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 252 Link *link;
11a7f229
TG		 253
254 assert(m);
e856ed00 255 assert(ifindex > 0);
11a7f229 256
6eab614d 257 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 258 if (!link)
259 return -ENODEV;
260
0b54c870
YW		 261 if (ret)
262 *ret = link;
263 return 0;
264}
265
266int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
267 Link *link;
268
269 assert(m);
270 assert(ifname);
11a7f229 271
0b54c870
YW		 272 link = hashmap_get(m->links_by_name, ifname);
273 if (!link)
274 return -ENODEV;
275
276 if (ret)
277 *ret = link;
11a7f229
TG		 278 return 0;
279}
280
fe321d45
YW		 281int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
282 Link *link;
283
284 assert(m);
285 assert(hw_addr);
286
287 link = hashmap_get(m->links_by_hw_addr, hw_addr);
288 if (!link)
289 return -ENODEV;
290
291 if (ret)
292 *ret = link;
293 return 0;
294}
295
81357285
YW		 296int link_get_master(Link *link, Link **ret) {
297 assert(link);
298 assert(link->manager);
299 assert(ret);
300
301 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
302 return -ENODEV;
303
6eab614d 304 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 305}
306
af9ba57a 307void link_set_state(Link *link, LinkState state) {
e331e246
TG		 308 assert(link);
309
310 if (link->state == state)
311 return;
312
0beb9542
YW		 313 log_link_debug(link, "State changed: %s -> %s",
314 link_state_to_string(link->state),
315 link_state_to_string(state));
316
e331e246
TG		 317 link->state = state;
318
319 link_send_changed(link, "AdministrativeState", NULL);
9092113d 320 link_dirty(link);
e331e246
TG		 321}
322
2a99eed0 323int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 324 int r = 0, k;
325
326 assert(link);
327 assert(link->manager);
328 assert(link->manager->event);
329
80060352
ZJS		 330 bool keep_dhcp = may_keep_dhcp &&
331 link->network &&
76a86ffd 332 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 333 (link->manager->restarting ||
334 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
335
84add3cd 336 if (!keep_dhcp) {
111bb8f9 337 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 338 if (k < 0)
36c7d709 339 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 340 }
341
2a99eed0
YW		 342 k = sd_dhcp_server_stop(link->dhcp_server);
343 if (k < 0)
344 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
345
35778343 346 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 347 if (k < 0)
c01b9b87
YW		 348 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
349
350 k = sd_lldp_tx_stop(link->lldp_tx);
351 if (k < 0)
352 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 353
84add3cd
YW		 354 k = sd_ipv4ll_stop(link->ipv4ll);
355 if (k < 0)
356 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 357
76a86ffd 358 k = ipv4acd_stop(link);
2488e4d9
YW		 359 if (k < 0)
360 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 361
84add3cd
YW		 362 k = sd_dhcp6_client_stop(link->dhcp6_client);
363 if (k < 0)
364 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 365
a27588d4 366 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 367 if (k < 0)
368 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 369
77302468 370 k = ndisc_stop(link);
84add3cd
YW		 371 if (k < 0)
372 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 373
259c65f3
YW		 374 ndisc_flush(link);
375
84add3cd
YW		 376 k = sd_radv_stop(link->radv);
377 if (k < 0)
378 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 379
111bb8f9
TG		 380 return r;
381}
382
b22d8a00 383void link_enter_failed(Link *link) {
ef1ba606 384 assert(link);
f882c247 385
370e9930 386 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 387 return;
388
6a7a4e4d 389 log_link_warning(link, "Failed");
449f7554 390
e331e246 391 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 392
2a99eed0 393 (void) link_stop_engines(link, false);
f882c247
TG		 394}
395
6accfd31
DA		 396void link_check_ready(Link *link) {
397 Address *a;
6accfd31
DA		 398
399 assert(link);
400
5f58af25
YW		 401 if (link->state == LINK_STATE_CONFIGURED)
402 return;
403
d19b9939
YW		 404 if (link->state != LINK_STATE_CONFIGURING)
405 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 406
407 if (!link->network)
a7f07cbe 408 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 409
7558f9e7
YW		 410 if (!link->tc_configured)
411 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 412
a7f07cbe
YW		 413 if (link->set_link_messages > 0)
414 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
415
416 if (!link->activated)
417 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
418
7558f9e7
YW		 419 if (link->iftype == ARPHRD_CAN) {
420 /* let's shortcut things for CAN which doesn't need most of checks below. */
421 link_set_state(link, LINK_STATE_CONFIGURED);
422 return;
423 }
424
879377ca
YW		 425 if (!link->stacked_netdevs_created)
426 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
427
76c5a0f2 428 if (!link->static_addresses_configured)
d19b9939 429 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 430
354bc760
YW		 431 if (!link->static_address_labels_configured)
432 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
433
e5b35bf6
YW		 434 if (!link->static_bridge_fdb_configured)
435 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
436
ff9e0783
YW		 437 if (!link->static_bridge_mdb_configured)
438 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
439
fdeba3f5
YW		 440 if (!link->static_ipv6_proxy_ndp_configured)
441 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
442
40ca350e
YW		 443 if (!link->static_neighbors_configured)
444 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
445
d19b9939
YW		 446 if (!link->static_nexthops_configured)
447 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 448
76c5a0f2
YW		 449 if (!link->static_routes_configured)
450 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
451
0e5ef6be 452 if (!link->static_routing_policy_rules_configured)
d19b9939 453 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 454
d19b9939
YW		 455 if (!link->sr_iov_configured)
456 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 457
4bcb8625
YW		 458 /* IPv6LL is assigned after the link gains its carrier. */
459 if (!link->network->configure_without_carrier &&
460 link_ipv6ll_enabled(link) &&
461 !in6_addr_is_set(&link->ipv6ll_address))
462 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
463
9e7d91ed
YW		 464 /* All static addresses must be ready. */
465 bool has_static_address = false;
466 SET_FOREACH(a, link->addresses) {
467 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
468 continue;
469 if (!address_is_ready(a))
470 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
471 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
472 has_static_address = true;
473 }
474
475 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
476 if (has_static_address)
477 goto ready;
478
5f950e56
YW		 479 /* If no dynamic addressing protocol enabled, assume the interface is ready.
480 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
481 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
482 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
483 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
484 goto ready;
485
486 bool ipv4ll_ready =
487 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
488 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
489 bool dhcp4_ready =
490 link_dhcp4_enabled(link) && link->dhcp4_configured &&
491 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
492 bool dhcp6_ready =
493 link_dhcp6_enabled(link) && link->dhcp6_configured &&
494 (!link->network->dhcp6_use_address ||
495 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
496 bool dhcp_pd_ready =
497 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
498 (!link->network->dhcp_pd_assign ||
499 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
500 bool ndisc_ready =
501 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
502 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
503 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
504
195b83ed
YW		 505 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
506 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
507 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 508 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
195b83ed
YW		 509 if (!dhcp4_ready)
510 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
511 if (!dhcp_pd_ready)
512 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
513 }
514
515 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 516 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
195b83ed
YW		 517 if (!dhcp6_ready)
518 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
519 if (!dhcp_pd_ready)
520 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
521 }
522 }
523
5f950e56
YW		 524 /* At least one dynamic addressing protocol is finished. */
525 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
526 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
527
528 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
529 __func__,
530 yes_no(ipv4ll_ready),
531 yes_no(dhcp4_ready),
532 yes_no(dhcp6_ready),
533 yes_no(dhcp_pd_ready),
534 yes_no(ndisc_ready));
535
536ready:
29836c16 537 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 538}
539
97108953 540static int link_request_static_configs(Link *link) {
f882c247
TG		 541 int r;
542
543 assert(link);
544 assert(link->network);
f5be5601 545 assert(link->state != _LINK_STATE_INVALID);
f882c247 546
354bc760 547 r = link_request_static_addresses(link);
0e5ef6be
YW		 548 if (r < 0)
549 return r;
550
354bc760 551 r = link_request_static_address_labels(link);
f3ef324d
YW		 552 if (r < 0)
553 return r;
e4a71bf3 554
e5b35bf6
YW		 555 r = link_request_static_bridge_fdb(link);
556 if (r < 0)
557 return r;
558
9a038aac
YW		 559 r = link_request_static_bridge_mdb(link);
560 if (r < 0)
561 return r;
562
fdeba3f5
YW		 563 r = link_request_static_ipv6_proxy_ndp_addresses(link);
564 if (r < 0)
565 return r;
566
40ca350e 567 r = link_request_static_neighbors(link);
682c65b0
YW		 568 if (r < 0)
569 return r;
bd6379ec 570
76c5a0f2 571 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 572 if (r < 0)
573 return r;
f882c247 574
76c5a0f2
YW		 575 r = link_request_static_routes(link, false);
576 if (r < 0)
577 return r;
578
579 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 580 if (r < 0)
581 return r;
d4cdbea5 582
f882c247
TG		 583 return 0;
584}
585
1187fc33
YW		 586static int link_request_stacked_netdevs(Link *link) {
587 NetDev *netdev;
e16e4b3b
DS		 588 int r;
589
590 assert(link);
591
1187fc33 592 link->stacked_netdevs_created = false;
e16e4b3b 593
1187fc33 594 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 595 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 596 if (r < 0)
597 return r;
598 }
e16e4b3b 599
bb916f35 600 if (link->create_stacked_netdev_messages == 0) {
1187fc33 601 link->stacked_netdevs_created = true;
bb916f35
YW		 602 link_check_ready(link);
603 }
e16e4b3b
DS		 604
605 return 0;
606}
607
8566df79 608static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 609 int r;
610
611 assert(link);
612
0f96a823
YW		 613 r = radv_start(link);
614 if (r < 0)
615 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 616
294f129b
YW		 617 r = ndisc_start(link);
618 if (r < 0)
619 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 620
294f129b
YW		 621 r = dhcp6_start(link);
622 if (r < 0)
623 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 624
e7ab854c
TG		 625 return 0;
626}
627
8566df79 628static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 629 int r;
630
631 assert(link);
ff254138
TG		 632 assert(link->manager);
633 assert(link->manager->event);
634
0107b769 635 if (link->dhcp_client) {
294f129b 636 r = dhcp4_start(link);
0107b769 637 if (r < 0)
294f129b 638 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 639
ccffa166 640 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 641
ccffa166 642 } else if (link->ipv4ll) {
59c27231
AK		 643 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
644 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
645 if (r < 0)
646 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
647 }
648
5c1d3fc9 649 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 650 if (r < 0)
651 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 652
653 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 654 }
655
ab486ef4
YW		 656 if (link->dhcp_server) {
657 r = sd_dhcp_server_start(link->dhcp_server);
658 if (r < 0)
659 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
660 }
661
76a86ffd
YW		 662 r = ipv4acd_start(link);
663 if (r < 0)
664 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
665
6fc25497
SS		 666 return 0;
667}
668
8566df79 669static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 670 int r;
671
672 assert(link);
0f96a823 673 assert(link->network);
6fc25497 674
8566df79 675 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 676 if (r < 0)
677 return r;
678
94876904 679 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 680 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 681 if (r < 0)
682 return r;
683 }
684
a27588d4 685 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 686 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
687 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
688 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
689 * below will be called in radv_start(). */
a27588d4 690 r = dhcp_request_prefix_delegation(link);
0f96a823 691 if (r < 0)
a27588d4 692 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 693 }
694
c01b9b87
YW		 695 if (link->lldp_tx) {
696 r = sd_lldp_tx_start(link->lldp_tx);
697 if (r < 0)
698 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
699 }
8e1ad1ea 700
35778343
YW		 701 if (link->lldp_rx) {
702 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 703 if (r < 0)
704 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
705 }
706
ff254138
TG		 707 return 0;
708}
709
7657ec3e 710int link_ipv6ll_gained(Link *link) {
0c9ee5d5 711 int r;
deb2e523 712
0c9ee5d5 713 assert(link);
deb2e523 714
0c9ee5d5 715 log_link_info(link, "Gained IPv6LL");
deb2e523 716
7657ec3e
YW		 717 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
718 return 0;
0c9ee5d5 719
7657ec3e
YW		 720 r = link_acquire_dynamic_ipv6_conf(link);
721 if (r < 0)
722 return r;
0c9ee5d5 723
7657ec3e 724 link_check_ready(link);
0c9ee5d5 725 return 0;
deb2e523
TG		 726}
727
112a0972 728int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 729 bool required_up = false;
730 bool link_is_up = false;
852a3916 731 Link *l;
0d4ad91d
AR		 732
733 assert(link);
734
ad82f0c3
YW		 735 /* If at least one interface in bound_to_links has carrier, then make this interface up.
736 * If all interfaces in bound_to_links do not, then make this interface down. */
737
0d4ad91d
AR		 738 if (hashmap_isempty(link->bound_to_links))
739 return 0;
740
741 if (link->flags & IFF_UP)
742 link_is_up = true;
743
852a3916 744 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 745 if (link_has_carrier(l)) {
746 required_up = true;
747 break;
748 }
749
852a3916 750 if (!required_up && link_is_up)
68f52063 751 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 752 if (required_up && !link_is_up)
68f52063 753 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 754
755 return 0;
756}
757
758static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 759 Link *l;
760 int r;
761
762 assert(link);
763
ad82f0c3
YW		 764 /* Update up or down state of interfaces which depend on this interface's carrier state. */
765
0d4ad91d
AR		 766 if (hashmap_isempty(link->bound_by_links))
767 return 0;
768
852a3916 769 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 770 r = link_handle_bound_to_list(l);
771 if (r < 0)
772 return r;
773 }
774
775 return 0;
776}
777
778static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
779 int r;
780
781 assert(link);
782 assert(carrier);
783
784 if (link == carrier)
785 return 0;
786
787 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
788 return 0;
789
190b3b5c 790 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 791 if (r < 0)
792 return r;
793
9092113d
YW		 794 link_dirty(link);
795
0d4ad91d
AR		 796 return 0;
797}
798
799static int link_new_bound_by_list(Link *link) {
800 Manager *m;
801 Link *carrier;
0d4ad91d 802 int r;
0d4ad91d
AR		 803
804 assert(link);
805 assert(link->manager);
806
807 m = link->manager;
808
6eab614d 809 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 810 if (!carrier->network)
811 continue;
812
813 if (strv_isempty(carrier->network->bind_carrier))
814 continue;
815
191a3f16 816 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 817 r = link_put_carrier(link, carrier, &link->bound_by_links);
818 if (r < 0)
819 return r;
0d4ad91d
AR		 820 }
821 }
822
90e74a66 823 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 824 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
825 if (r < 0)
826 return r;
0d4ad91d
AR		 827 }
828
829 return 0;
830}
831
832static int link_new_bound_to_list(Link *link) {
833 Manager *m;
834 Link *carrier;
0d4ad91d 835 int r;
0d4ad91d
AR		 836
837 assert(link);
838 assert(link->manager);
839
840 if (!link->network)
841 return 0;
842
843 if (strv_isempty(link->network->bind_carrier))
844 return 0;
845
846 m = link->manager;
847
6eab614d 848 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 849 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 850 r = link_put_carrier(link, carrier, &link->bound_to_links);
851 if (r < 0)
852 return r;
0d4ad91d
AR		 853 }
854 }
855
852a3916 856 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 857 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
858 if (r < 0)
859 return r;
0d4ad91d
AR		 860 }
861
862 return 0;
863}
864
0d4ad91d 865static void link_free_bound_to_list(Link *link) {
9092113d 866 bool updated = false;
0d4ad91d 867 Link *bound_to;
0d4ad91d 868
9092113d
YW		 869 assert(link);
870
871 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
872 updated = true;
0d4ad91d
AR		 873
874 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 875 link_dirty(bound_to);
0d4ad91d
AR		 876 }
877
9092113d
YW		 878 if (updated)
879 link_dirty(link);
0d4ad91d
AR		 880}
881
882static void link_free_bound_by_list(Link *link) {
9092113d 883 bool updated = false;
0d4ad91d 884 Link *bound_by;
0d4ad91d 885
9092113d
YW		 886 assert(link);
887
888 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
889 updated = true;
0d4ad91d
AR		 890
891 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 892 link_dirty(bound_by);
0d4ad91d
AR		 893 link_handle_bound_to_list(bound_by);
894 }
895 }
896
9092113d
YW		 897 if (updated)
898 link_dirty(link);
0d4ad91d
AR		 899}
900
81357285 901static int link_append_to_master(Link *link) {
5f707e12
YW		 902 Link *master;
903 int r;
904
905 assert(link);
5f707e12 906
81357285
YW		 907 /* - The link may have no master.
908 * - RTM_NEWLINK message about master interface may not be received yet. */
909 if (link_get_master(link, &master) < 0)
910 return 0;
5f707e12 911
de7fef4b 912 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 913 if (r <= 0)
5f707e12
YW		 914 return r;
915
916 link_ref(link);
917 return 0;
918}
919
81357285 920static void link_drop_from_master(Link *link) {
5f707e12
YW		 921 Link *master;
922
923 assert(link);
924
81357285 925 if (!link->manager)
5f707e12
YW		 926 return;
927
81357285 928 if (link_get_master(link, &master) < 0)
5f707e12
YW		 929 return;
930
931 link_unref(set_remove(master->slaves, link));
932}
933
56001f02
YW		 934static void link_drop_requests(Link *link) {
935 Request *req;
936
937 assert(link);
938 assert(link->manager);
939
940 ORDERED_SET_FOREACH(req, link->manager->request_queue)
941 if (req->link == link)
e26d3d40 942 request_detach(link->manager, req);
56001f02
YW		 943}
944
cc2d7efc 945static Link *link_drop(Link *link) {
63130eb3 946 if (!link)
cc2d7efc 947 return NULL;
0d4ad91d 948
63130eb3
YW		 949 assert(link->manager);
950
0d4ad91d
AR		 951 link_set_state(link, LINK_STATE_LINGER);
952
63130eb3
YW		 953 /* Drop all references from other links and manager. Note that async netlink calls may have
954 * references to the link, and they will be dropped when we receive replies. */
955
56001f02
YW		 956 link_drop_requests(link);
957
bb193d2d
YW		 958 link_free_bound_to_list(link);
959 link_free_bound_by_list(link);
0d4ad91d 960
b0ff6dea
YW		 961 link_clear_sr_iov_ifindices(link);
962
81357285 963 link_drop_from_master(link);
5f707e12 964
4c78dc17
YW		 965 if (link->state_file)
966 (void) unlink(link->state_file);
967
63130eb3
YW		 968 link_clean(link);
969
0b54c870
YW		 970 STRV_FOREACH(n, link->alternative_names)
971 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 972 hashmap_remove(link->manager->links_by_name, link->ifname);
973
fe321d45 974 /* bonding master and its slaves have the same hardware address. */
e74f1d07 975 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 976
63130eb3 977 /* The following must be called at last. */
6eab614d 978 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 979 return link_unref(link);
0d4ad91d
AR		 980}
981
5e5b137a 982static int link_drop_foreign_config(Link *link) {
1339b950 983 int r;
0b81225e
YW		 984
985 assert(link);
986 assert(link->manager);
5e5b137a 987
5e3bb5da
YW		 988 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
989 * to remove loopback address or addresses used for root NFS. */
990
991 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
992 return 0;
993 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
994 return 0;
995 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
996 return 0;
997
e36d601c 998 r = link_drop_foreign_routes(link);
5e5b137a 999
1339b950
ZJS		 1000 RET_GATHER(r, link_drop_foreign_nexthops(link));
1001 RET_GATHER(r, link_drop_foreign_addresses(link));
1002 RET_GATHER(r, link_drop_foreign_neighbors(link));
1003 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW		 1004
1005 return r;
5e5b137a
TG		 1006}
1007
a0e99a37 1008static int link_drop_managed_config(Link *link) {
1339b950 1009 int r;
0b81225e
YW		 1010
1011 assert(link);
1012 assert(link->manager);
3104883d 1013
a0e99a37 1014 r = link_drop_managed_routes(link);
3104883d 1015
1339b950
ZJS		 1016 RET_GATHER(r, link_drop_managed_nexthops(link));
1017 RET_GATHER(r, link_drop_managed_addresses(link));
1018 RET_GATHER(r, link_drop_managed_neighbors(link));
1019 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 1020
0b81225e 1021 return r;
3104883d
SS		 1022}
1023
b4564f4e
YW		 1024static void link_foreignize_config(Link *link) {
1025 assert(link);
1026 assert(link->manager);
1027
1028 link_foreignize_routes(link);
1029 link_foreignize_nexthops(link);
1030 link_foreignize_addresses(link);
1031 link_foreignize_neighbors(link);
1032 link_foreignize_routing_policy_rules(link);
1033}
1034
c3b94251 1035static int link_configure(Link *link) {
4ecdcb07
YW		 1036 int r;
1037
ef1ba606 1038 assert(link);
b22d8a00 1039 assert(link->network);
bd08ce56 1040 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1041
1187fc33
YW		 1042 link_set_state(link, LINK_STATE_CONFIGURING);
1043
3cf58ef3
YW		 1044 r = link_new_bound_to_list(link);
1045 if (r < 0)
1046 return r;
1047
1dec9d81 1048 r = link_request_traffic_control(link);
4ecdcb07
YW		 1049 if (r < 0)
1050 return r;
1051
7558f9e7
YW		 1052 if (link->iftype == ARPHRD_CAN) {
1053 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1054 r = link_request_to_set_can(link);
1055 if (r < 0)
1056 return r;
1057
1058 return link_request_to_activate(link);
1059 }
1060
cb8453cc 1061 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1062 if (r < 0)
1063 return r;
1064
5e0534f1 1065 r = link_set_sysctl(link);
b69c3180
SS		 1066 if (r < 0)
1067 return r;
8749cbcd 1068
d05c332c 1069 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1070 if (r < 0)
1071 return r;
1072
72e65e6f
YW		 1073 r = link_request_to_set_ipoib(link);
1074 if (r < 0)
1075 return r;
1076
1187fc33 1077 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1078 if (r < 0)
1079 return r;
1080
1187fc33 1081 r = link_request_to_set_group(link);
99d2baa2
SS		 1082 if (r < 0)
1083 return r;
1084
1187fc33
YW		 1085 r = link_configure_mtu(link);
1086 if (r < 0)
1087 return r;
1088
1089 r = link_request_to_set_addrgen_mode(link);
1090 if (r < 0)
1091 return r;
1092
1093 r = link_request_to_set_master(link);
1094 if (r < 0)
1095 return r;
1096
1097 r = link_request_stacked_netdevs(link);
1098 if (r < 0)
1099 return r;
1100
1101 r = link_request_to_set_bond(link);
1102 if (r < 0)
1103 return r;
1104
1105 r = link_request_to_set_bridge(link);
1106 if (r < 0)
1107 return r;
1108
1109 r = link_request_to_set_bridge_vlan(link);
1110 if (r < 0)
1111 return r;
1112
1113 r = link_request_to_activate(link);
89fe6535
SS		 1114 if (r < 0)
1115 return r;
1116
2ffd6d73
YW		 1117 r = ipv4ll_configure(link);
1118 if (r < 0)
1119 return r;
64b21ece 1120
ccffa166 1121 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1122 if (r < 0)
1123 return r;
eb34d4af 1124
ccffa166 1125 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1126 if (r < 0)
1127 return r;
f5a8c43f 1128
ba4c7184 1129 r = link_request_ndisc(link);
2ffd6d73
YW		 1130 if (r < 0)
1131 return r;
4138fb2c 1132
1d28a3cf
YW		 1133 r = link_request_dhcp_server(link);
1134 if (r < 0)
1135 return r;
1136
a254fab2 1137 r = link_request_radv(link);
086b8853
YW		 1138 if (r < 0)
1139 return r;
7465dd22 1140
2ffd6d73
YW		 1141 r = link_lldp_rx_configure(link);
1142 if (r < 0)
1143 return r;
ce43e484 1144
c01b9b87
YW		 1145 r = link_lldp_tx_configure(link);
1146 if (r < 0)
1147 return r;
1148
5e3bb5da
YW		 1149 r = link_drop_foreign_config(link);
1150 if (r < 0)
1151 return r;
4c649652 1152
1187fc33
YW		 1153 r = link_request_static_configs(link);
1154 if (r < 0)
1155 return r;
1156
1157 if (!link_has_carrier(link))
1158 return 0;
1159
1160 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1161}
1162
170e88c8
YW		 1163static int link_get_network(Link *link, Network **ret) {
1164 Network *network;
1a3caa49 1165 int r;
170e88c8
YW		 1166
1167 assert(link);
1168 assert(link->manager);
1169 assert(ret);
1170
1171 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1172 bool warn = false;
1173
1a3caa49 1174 r = net_match_config(
170e88c8 1175 &network->match,
8de56fb3 1176 link->dev,
52135071
YW		 1177 &link->hw_addr,
1178 &link->permanent_hw_addr,
170e88c8
YW		 1179 link->driver,
1180 link->iftype,
65022cd7 1181 link->kind,
170e88c8
YW		 1182 link->ifname,
1183 link->alternative_names,
1184 link->wlan_iftype,
1185 link->ssid,
1a3caa49
YW		 1186 &link->bssid);
1187 if (r < 0)
1188 return r;
1189 if (r == 0)
170e88c8
YW		 1190 continue;
1191
8de56fb3 1192 if (network->match.ifname && link->dev) {
170e88c8
YW		 1193 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1194 const char *attr;
1195
8de56fb3 1196 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1197 (void) safe_atou8(attr, &name_assign_type);
1198
1199 warn = name_assign_type == NET_NAME_ENUM;
1200 }
1201
1202 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1203 "found matching network '%s'%s.",
1204 network->filename,
1205 warn ? ", based on potentially unpredictable interface name" : "");
1206
1207 if (network->unmanaged)
1208 return -ENOENT;
1209
1210 *ret = network;
1211 return 0;
1212 }
1213
1214 return -ENOENT;
1215}
1216
8a4ad01a 1217int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1218 Network *network = NULL;
9aa2585e 1219 NetDev *netdev = NULL;
ad932b15
YW		 1220 int r;
1221
5a1860f7 1222 assert(link);
572b21d9 1223
4faca0a3 1224 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1225 return 0;
1226
9aa2585e
YW		 1227 r = netdev_get(link->manager, link->ifname, &netdev);
1228 if (r < 0 && r != -ENOENT)
1229 return r;
1230
170e88c8 1231 r = link_get_network(link, &network);
cb71e9c6 1232 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1233 return r;
1234
fb961119
YW		 1235 if (link->state != LINK_STATE_UNMANAGED && !network)
1236 /* If link is in initialized state, then link->network is also NULL. */
1237 force = true;
1238
99b8517c 1239 if (link->network == network && !force)
ad932b15
YW		 1240 return 0;
1241
fb961119
YW		 1242 if (network) {
1243 if (link->state == LINK_STATE_INITIALIZED)
1244 log_link_info(link, "Configuring with %s.", network->filename);
1245 else
1246 log_link_info(link, "Reconfiguring with %s.", network->filename);
1247 } else
1248 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1249 "Unmanaging interface.");
ad932b15
YW		 1250
1251 /* Dropping old .network file */
2a99eed0 1252 r = link_stop_engines(link, false);
572b21d9 1253 if (r < 0)
ad932b15 1254 return r;
ad932b15 1255
19d9a5ad
YW		 1256 link_drop_requests(link);
1257
81db4f3d 1258 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1259 /* When a new/updated .network file is assigned, first make all configs (addresses,
1260 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1261 * link_drop_foreign_config() in link_configure().
1262 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1263 * here we need to drop the configs such as addresses, routes, and so on configured by
1264 * the previously assigned .network file. */
b4564f4e
YW		 1265 link_foreignize_config(link);
1266 else {
a0e99a37
YW		 1267 /* Remove all managed configs. Note, foreign configs are removed in later by
1268 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1269 r = link_drop_managed_config(link);
b4564f4e
YW		 1270 if (r < 0)
1271 return r;
1272 }
ad932b15 1273
3cf58ef3
YW		 1274 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1275 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1276 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1277 * map here, as it depends on .network files assigned to other links. */
1278 link_free_bound_to_list(link);
1279
ad932b15
YW		 1280 link_free_engines(link);
1281 link->network = network_unref(link->network);
1282
9aa2585e
YW		 1283 netdev_unref(link->netdev);
1284 link->netdev = netdev_ref(netdev);
1285
cb71e9c6
YW		 1286 if (!network) {
1287 link_set_state(link, LINK_STATE_UNMANAGED);
1288 return 0;
1289 }
1290
ad932b15 1291 /* Then, apply new .network file */
9092113d 1292 link->network = network_ref(network);
b156a95d 1293 link_update_operstate(link, true);
9092113d 1294 link_dirty(link);
ad932b15 1295
ad932b15 1296 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1297 link->activated = false;
ad932b15 1298
ad932b15
YW		 1299 r = link_configure(link);
1300 if (r < 0)
1301 return r;
1302
0e397560 1303 return 1;
ad932b15
YW		 1304}
1305
96f5f9ef 1306static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1307 int r;
1308
d09a179e
YW		 1309 assert(link);
1310
5a1860f7
YW		 1311 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1312 if (r <= 0)
1313 return r;
1314
7f80fa12 1315 r = link_reconfigure_impl(link, force);
d09a179e 1316 if (r < 0) {
572b21d9 1317 link_enter_failed(link);
d09a179e
YW		 1318 return 0;
1319 }
572b21d9 1320
d09a179e 1321 return r;
572b21d9
YW		 1322}
1323
5a1860f7 1324static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1325 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1326}
572b21d9 1327
5a1860f7 1328static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1329 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1330}
1331
a39a9ac8 1332int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1333 int r;
1334
1335 assert(link);
d09a179e 1336
8bceafa7 1337 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1338 * the function from being called multiple times simultaneously, refuse to reconfigure the
1339 * interface in these cases. */
8bceafa7 1340 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1341 return 0; /* 0 means no-op. */
2c0d7ed3 1342
a39a9ac8 1343 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1344 if (r < 0)
1345 return r;
1346
8bceafa7 1347 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1348}
1349
e6bf7774 1350static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1351 int r;
1352
1353 assert(link);
505f8da7
TG		 1354 assert(link->manager);
1355
faa2e64f
YW		 1356 if (link->manager->test_mode) {
1357 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1358 link_set_state(link, LINK_STATE_UNMANAGED);
1359 return 0;
1360 }
1361
40695457
YW		 1362 if (link->state == LINK_STATE_PENDING) {
1363 log_link_debug(link, "Link state is up-to-date");
1364 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1365
40695457
YW		 1366 r = link_new_bound_by_list(link);
1367 if (r < 0)
1368 return r;
0d4ad91d 1369
40695457
YW		 1370 r = link_handle_bound_by_list(link);
1371 if (r < 0)
1372 return r;
1373 }
0d4ad91d 1374
fb961119 1375 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1376}
1377
302a796f 1378static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1379 int r;
1380
5a1860f7
YW		 1381 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1382 if (r <= 0)
0b54c870 1383 return r;
572b21d9 1384
4ff296b0
YW		 1385 r = link_initialized_and_synced(link);
1386 if (r < 0)
1387 link_enter_failed(link);
5a1860f7
YW		 1388
1389 return 0;
e6bf7774
YW		 1390}
1391
3be9d62a 1392static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1393 int r;
1394
4f561e8e 1395 assert(link);
4f561e8e
TG		 1396 assert(device);
1397
160203e9
YW		 1398 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1399 * or sysattrs) may be outdated. */
8de56fb3 1400 device_unref_and_replace(link->dev, device);
4f561e8e 1401
3b1dbdf0
YW		 1402 if (link->dhcp_client) {
1403 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1404 if (r < 0)
1405 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1406 }
1407
1408 if (link->dhcp6_client) {
1409 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1410 if (r < 0)
1411 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1412 }
1413
b0ff6dea
YW		 1414 r = link_set_sr_iov_ifindices(link);
1415 if (r < 0)
1416 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1417
40695457
YW		 1418 if (link->state != LINK_STATE_PENDING)
1419 return link_reconfigure(link, /* force = */ false);
679b3605 1420
79008bdd 1421 log_link_debug(link, "udev initialized link");
4f561e8e 1422
3c9b8860
TG		 1423 /* udev has initialized the link, but we don't know if we have yet
1424 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1425 * when it returns we know that the pending NEWLINKs have already been
1426 * processed and that we are up-to-date */
4f561e8e 1427
5a1860f7 1428 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1429}
1430
0d411b7f 1431static int link_check_initialized(Link *link) {
51517f9e 1432 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1433 int r;
505f8da7 1434
0d411b7f 1435 assert(link);
505f8da7 1436
82f52245 1437 if (!udev_available())
0d411b7f 1438 return link_initialized_and_synced(link);
852a3916
YW		 1439
1440 /* udev should be around */
0ac655a6 1441 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1442 if (r < 0) {
1443 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1444 return 0;
1445 }
1446
1447 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1448 if (r < 0)
1449 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1450 if (r == 0) {
1451 /* not yet ready */
1452 log_link_debug(link, "link pending udev initialization...");
1453 return 0;
1454 }
1455
1456 r = device_is_renaming(device);
0d411b7f
YW		 1457 if (r < 0)
1458 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1459 if (r > 0) {
1460 log_link_debug(link, "Interface is being renamed, pending initialization.");
1461 return 0;
4f561e8e 1462 }
505f8da7 1463
0d411b7f 1464 return link_initialized(link, device);
a748b692
TG		 1465}
1466
1fd3ac1e 1467int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1468 int r, ifindex;
ba87a61d 1469 const char *s;
1fd3ac1e 1470 Link *link;
3be9d62a
YW		 1471
1472 assert(m);
1473 assert(device);
1474
3be9d62a 1475 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1476 if (r < 0)
1477 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1478
75255a8d
YW		 1479 r = link_get_by_index(m, ifindex, &link);
1480 if (r < 0) {
1481 /* This error is not critical, as the corresponding rtnl message may be received later. */
1482 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1483 return 0;
1484 }
1485
1486 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1487 * object here. It will be removed only when rtnetlink says so. */
1488 if (action == SD_DEVICE_REMOVE) {
1489 link->dev = sd_device_unref(link->dev);
1490 return 0;
1491 }
1492
3be9d62a 1493 r = device_is_renaming(device);
1fd3ac1e
YW		 1494 if (r < 0)
1495 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1496 if (r > 0) {
1fd3ac1e 1497 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1498 /* TODO:
1499 * What happens when a device is initialized, then soon renamed after that? When we detect
1500 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1501 return 0;
1502 }
1503
ba87a61d
YW		 1504 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1505 if (r < 0 && r != -ENOENT)
1506 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1507 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1508 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1509 link_set_state(link, LINK_STATE_UNMANAGED);
1510 return 0;
1511 }
1512
4b9a8c2b
YW		 1513 r = link_initialized(link, device);
1514 if (r < 0)
1515 link_enter_failed(link);
3be9d62a
YW		 1516
1517 return 0;
1518}
1519
9c0a72f9 1520static int link_carrier_gained(Link *link) {
6706ce2f 1521 bool force_reconfigure;
9c0a72f9
TG		 1522 int r;
1523
1524 assert(link);
1525
6706ce2f
YW		 1526 r = event_source_disable(link->carrier_lost_timer);
1527 if (r < 0)
1528 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1529
d9910948
YW		 1530 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1531 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1532 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1533 * restarted, and the correct network information will be gained.
1534 *
1535 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1536 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1537 * already assigned to the interface (in that case, the .network file does not have the SSID=
1538 * setting in the [Match] section), and the interface is already being configured. Of course,
1539 * there may exist another .network file with higher priority and a matching SSID= setting. But
1540 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1541 *
6706ce2f 1542 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1543 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1544 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1545 link->previous_ssid = mfree(link->previous_ssid);
1546
986b2514
AŠ		 1547 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1548 * profile wants to match on it with SSID= in its [Match] section.
1549 */
1550 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1551 r = link_get_wlan_interface(link);
1552 if (r < 0)
1553 return r;
1554 }
1555
081466bd
YW		 1556 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1557 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1558 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1559 r = link_reconfigure_impl(link, force_reconfigure);
1560 if (r != 0)
1561 return r;
b7ac1284 1562
aa9117c0
YW		 1563 r = link_handle_bound_by_list(link);
1564 if (r < 0)
1565 return r;
1566
600b7898
YW		 1567 if (link->iftype == ARPHRD_CAN)
1568 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1569 return 0;
600b7898 1570
b9ea3d2e 1571 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1572 r = link_acquire_dynamic_conf(link);
f0269653 1573 if (r < 0)
9c0a72f9 1574 return r;
6fc25497 1575
97108953 1576 r = link_request_static_configs(link);
6fc25497
SS		 1577 if (r < 0)
1578 return r;
9c0a72f9
TG		 1579 }
1580
aa9117c0 1581 return 0;
9c0a72f9
TG		 1582}
1583
6706ce2f
YW		 1584static int link_carrier_lost_impl(Link *link) {
1585 int r, ret = 0;
1586
1587 assert(link);
1588
1589 link->previous_ssid = mfree(link->previous_ssid);
1590
1591 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1592 return 0;
1593
1594 if (!link->network)
1595 return 0;
1596
1597 r = link_stop_engines(link, false);
1598 if (r < 0)
1599 ret = r;
1600
a0e99a37 1601 r = link_drop_managed_config(link);
6706ce2f
YW		 1602 if (r < 0 && ret >= 0)
1603 ret = r;
1604
1605 return ret;
1606}
1607
1608static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1609 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1610 int r;
1611
6706ce2f
YW		 1612 r = link_carrier_lost_impl(link);
1613 if (r < 0) {
1614 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1615 link_enter_failed(link);
1616 }
1617
1618 return 0;
1619}
1620
9c0a72f9 1621static int link_carrier_lost(Link *link) {
b7326069
YW		 1622 uint16_t dhcp_mtu;
1623 usec_t usec;
9c0a72f9
TG		 1624 int r;
1625
1626 assert(link);
1627
aa9117c0
YW		 1628 r = link_handle_bound_by_list(link);
1629 if (r < 0)
1630 return r;
93b4dab5 1631
600b7898
YW		 1632 if (link->iftype == ARPHRD_CAN)
1633 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1634 return 0;
1635
f1c22cf4
YW		 1636 if (!link->network)
1637 return 0;
1638
b7326069
YW		 1639 if (link->network->ignore_carrier_loss_set)
1640 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1641 usec = link->network->ignore_carrier_loss_usec;
1642
1643 else if (link->network->bond && link->wlan_iftype > 0)
1644 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1645 * carrier to be lost. See #19832. */
1646 usec = 3 * USEC_PER_SEC;
1647
1648 else if (link->network->dhcp_use_mtu &&
1649 link->dhcp_lease &&
1650 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1651 dhcp_mtu != link->original_mtu)
1652 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1653 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1654 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1655 usec = 5 * USEC_PER_SEC;
1656
1657 else
1658 /* Otherwise, use the currently set value. */
1659 usec = link->network->ignore_carrier_loss_usec;
1660
1661 if (usec == USEC_INFINITY)
aa9117c0 1662 return 0;
600b7898 1663
b7326069 1664 if (usec == 0)
6706ce2f
YW		 1665 return link_carrier_lost_impl(link);
1666
1667 return event_reset_time_relative(link->manager->event,
1668 &link->carrier_lost_timer,
ba4e0427 1669 CLOCK_BOOTTIME,
b7326069 1670 usec,
6706ce2f
YW		 1671 0,
1672 link_carrier_lost_handler,
1673 link,
1674 0,
1675 "link-carrier-loss",
1676 true);
0c9ee5d5
YW		 1677}
1678
0c9ee5d5
YW		 1679static int link_admin_state_up(Link *link) {
1680 int r;
1681
1682 assert(link);
1683
1684 /* This is called every time an interface admin state changes to up;
1685 * specifically, when IFF_UP flag changes from unset to set. */
1686
1687 if (!link->network)
1688 return 0;
1689
899b0e5e 1690 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1691 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1692 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1693 }
1694
1695 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1696 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1697 r = link_set_ipv6_mtu(link);
1698 if (r < 0)
1699 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1700
1701 return 0;
1702}
1703
1704static int link_admin_state_down(Link *link) {
1705 assert(link);
1706
1707 if (!link->network)
1708 return 0;
1709
899b0e5e 1710 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1711 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1712 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1713 }
1714
1715 return 0;
1716}
1717
0c9ee5d5
YW		 1718static bool link_is_enslaved(Link *link) {
1719 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1720 return true;
1721
1f024462 1722 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1723 return true;
1724
0c9ee5d5
YW		 1725 return false;
1726}
1727
0c9ee5d5
YW		 1728void link_update_operstate(Link *link, bool also_update_master) {
1729 LinkOperationalState operstate;
1730 LinkCarrierState carrier_state;
1731 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1732 LinkOnlineState online_state;
1733 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1734 bool changed = false;
0c9ee5d5
YW		 1735
1736 assert(link);
1737
1738 if (link->kernel_operstate == IF_OPER_DORMANT)
1739 carrier_state = LINK_CARRIER_STATE_DORMANT;
1740 else if (link_has_carrier(link)) {
1741 if (link_is_enslaved(link))
1742 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1743 else
1744 carrier_state = LINK_CARRIER_STATE_CARRIER;
1745 } else if (link->flags & IFF_UP)
1746 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1747 else
1748 carrier_state = LINK_CARRIER_STATE_OFF;
1749
1750 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1751 Link *slave;
1752
1753 SET_FOREACH(slave, link->slaves) {
1754 link_update_operstate(slave, false);
1755
1756 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1757 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1758 }
1759 }
1760
60415c13 1761 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 1762
1763 /* Mapping of address and carrier state vs operational state
1764 * carrier state
1765 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1766 * ------------------------------------------------------------------------------
1767 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1768 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1769 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1770 */
1771
cf4dbd84
HH		 1772 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1773 operstate = LINK_OPERSTATE_ROUTABLE;
1774 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1775 operstate = LINK_OPERSTATE_DEGRADED;
1776 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1777 operstate = (LinkOperationalState) carrier_state;
1778 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1779 operstate = LINK_OPERSTATE_ROUTABLE;
1780 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1781 operstate = LINK_OPERSTATE_DEGRADED;
1782 else
1783 operstate = LINK_OPERSTATE_ENSLAVED;
1784
1785 /* Only determine online state for managed links with RequiredForOnline=yes */
1786 if (!link->network || !link->network->required_for_online)
1787 online_state = _LINK_ONLINE_STATE_INVALID;
1788 else if (operstate < link->network->required_operstate_for_online.min ||
1789 operstate > link->network->required_operstate_for_online.max)
1790 online_state = LINK_ONLINE_STATE_OFFLINE;
1791 else {
1792 AddressFamily required_family = link->network->required_family_for_online;
1793 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1794 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1795
1796 /* The operational state is within the range required for online.
1797 * If a particular address family is also required, we might revert
1798 * to offline in the blocks below. */
1799 online_state = LINK_ONLINE_STATE_ONLINE;
1800
1801 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1802 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1803 online_state = LINK_ONLINE_STATE_OFFLINE;
1804 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1805 online_state = LINK_ONLINE_STATE_OFFLINE;
1806 }
1807
1808 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1809 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1810 online_state = LINK_ONLINE_STATE_OFFLINE;
1811 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1812 online_state = LINK_ONLINE_STATE_OFFLINE;
1813 }
1814 }
1815
1816 if (link->carrier_state != carrier_state) {
1817 link->carrier_state = carrier_state;
1818 changed = true;
1819 if (strv_extend(&p, "CarrierState") < 0)
1820 log_oom();
1821 }
1822
1823 if (link->address_state != address_state) {
1824 link->address_state = address_state;
1825 changed = true;
1826 if (strv_extend(&p, "AddressState") < 0)
1827 log_oom();
1828 }
0d4ad91d 1829
0c9ee5d5
YW		 1830 if (link->ipv4_address_state != ipv4_address_state) {
1831 link->ipv4_address_state = ipv4_address_state;
1832 changed = true;
1833 if (strv_extend(&p, "IPv4AddressState") < 0)
1834 log_oom();
1835 }
9c0a72f9 1836
0c9ee5d5
YW		 1837 if (link->ipv6_address_state != ipv6_address_state) {
1838 link->ipv6_address_state = ipv6_address_state;
1839 changed = true;
1840 if (strv_extend(&p, "IPv6AddressState") < 0)
1841 log_oom();
1842 }
9c0a72f9 1843
0c9ee5d5
YW		 1844 if (link->operstate != operstate) {
1845 link->operstate = operstate;
1846 changed = true;
1847 if (strv_extend(&p, "OperationalState") < 0)
1848 log_oom();
1849 }
9c0a72f9 1850
0c9ee5d5
YW		 1851 if (link->online_state != online_state) {
1852 link->online_state = online_state;
1853 changed = true;
1854 if (strv_extend(&p, "OnlineState") < 0)
1855 log_oom();
1856 }
9c0a72f9 1857
0c9ee5d5
YW		 1858 if (p)
1859 link_send_changed_strv(link, p);
1860 if (changed)
1861 link_dirty(link);
9c0a72f9 1862
0c9ee5d5
YW		 1863 if (also_update_master) {
1864 Link *master;
9c0a72f9 1865
0c9ee5d5
YW		 1866 if (link_get_master(link, &master) >= 0)
1867 link_update_operstate(master, true);
1868 }
9c0a72f9
TG		 1869}
1870
0c9ee5d5
YW		 1871#define FLAG_STRING(string, flag, old, new) \
1872 (((old ^ new) & flag) \
1873 ? ((old & flag) ? (" -" string) : (" +" string)) \
1874 : "")
1875
0d411b7f 1876static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1877 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1878 uint8_t operstate;
1879 unsigned flags;
d236718c
DS		 1880 int r;
1881
61135582 1882 assert(link);
0d411b7f 1883 assert(message);
61135582 1884
0d411b7f 1885 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1886 if (r < 0)
0d411b7f 1887 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1888
0d411b7f
YW		 1889 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1890 if (r == -ENODATA)
1891 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1892 operstate = link->kernel_operstate;
0d411b7f
YW		 1893 else if (r < 0)
1894 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1895
0d411b7f 1896 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1897 return 0;
1898
0c9ee5d5
YW		 1899 if (link->flags != flags) {
1900 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1901
0c9ee5d5
YW		 1902 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",
1903 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1904 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1905 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1906 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1907 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1908 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1909 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1910 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1911 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1912 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1913 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1914 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1915 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1916 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1917 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1918 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1919 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1920 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1921 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1922
0c9ee5d5
YW		 1923 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1924 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1925 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1926 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1927 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1928 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1929 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1930 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1931
0c9ee5d5
YW		 1932 if (unknown_flags_added)
1933 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1934
0c9ee5d5
YW		 1935 if (unknown_flags_removed)
1936 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1937 }
61135582 1938
0d411b7f
YW		 1939 link_was_admin_up = link->flags & IFF_UP;
1940 had_carrier = link_has_carrier(link);
1941
0c9ee5d5
YW		 1942 link->flags = flags;
1943 link->kernel_operstate = operstate;
36161cba 1944
0c9ee5d5 1945 link_update_operstate(link, true);
61135582 1946
0d411b7f
YW		 1947 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1948 log_link_info(link, "Link UP");
22936833 1949
0d411b7f
YW		 1950 r = link_admin_state_up(link);
1951 if (r < 0)
1952 return r;
1953 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1954 log_link_info(link, "Link DOWN");
0d4ad91d 1955
0d411b7f 1956 r = link_admin_state_down(link);
0d4ad91d
AR		 1957 if (r < 0)
1958 return r;
7619683b
TG		 1959 }
1960
0d411b7f
YW		 1961 if (!had_carrier && link_has_carrier(link)) {
1962 log_link_info(link, "Gained carrier");
0d4ad91d 1963
0d411b7f 1964 r = link_carrier_gained(link);
30de2b89
YW		 1965 if (r < 0)
1966 return r;
0d411b7f
YW		 1967 } else if (had_carrier && !link_has_carrier(link)) {
1968 log_link_info(link, "Lost carrier");
1969
1970 r = link_carrier_lost(link);
0b54c870
YW		 1971 if (r < 0)
1972 return r;
b8941f74
TG		 1973 }
1974
0d411b7f
YW		 1975 return 0;
1976}
afe7fd56 1977
0d411b7f
YW		 1978static int link_update_master(Link *link, sd_netlink_message *message) {
1979 int master_ifindex, r;
7465dd22 1980
0d411b7f
YW		 1981 assert(link);
1982 assert(message);
69629de9 1983
0d411b7f
YW		 1984 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1985 if (r == -ENODATA)
1986 return 0;
1987 if (r < 0)
1988 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1989
571bf1aa
YW		 1990 if (master_ifindex == link->ifindex)
1991 master_ifindex = 0;
1992
0d411b7f
YW		 1993 if (master_ifindex == link->master_ifindex)
1994 return 0;
807667f7 1995
0d411b7f 1996 if (link->master_ifindex == 0)
8458ca26 1997 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 1998 else if (master_ifindex == 0)
8458ca26 1999 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 2000 else
e2341b6b
DT		 2001 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2002 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2003
0d411b7f 2004 link_drop_from_master(link);
807667f7 2005
0d411b7f 2006 link->master_ifindex = master_ifindex;
413708d1 2007
0d411b7f
YW		 2008 r = link_append_to_master(link);
2009 if (r < 0)
2010 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2011
0d411b7f
YW		 2012 return 0;
2013}
807667f7 2014
e1658632
YW		 2015static int link_update_driver(Link *link, sd_netlink_message *message) {
2016 int r;
2017
2018 assert(link);
2019 assert(link->manager);
2020 assert(message);
2021
2022 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2023 if (link->ethtool_driver_read)
e1658632
YW		 2024 return 0;
2025
2026 /* When udevd is running, read the driver after the interface is initialized by udevd.
2027 * Otherwise, ethtool may not work correctly. See issue #22538.
2028 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2029 if (udev_available() && !link->dev)
e1658632
YW		 2030 return 0;
2031
6625c39e
YW		 2032 link->ethtool_driver_read = true;
2033
e1658632
YW		 2034 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2035 if (r < 0) {
2036 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2037 return 0;
2038 }
2039
2040 log_link_debug(link, "Found driver: %s", strna(link->driver));
2041
2042 if (streq_ptr(link->driver, "dsa")) {
2043 uint32_t dsa_master_ifindex = 0;
2044
2045 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2046 if (r < 0 && r != -ENODATA)
2047 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2048
2049 if (dsa_master_ifindex > INT_MAX) {
2050 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2051 dsa_master_ifindex);
2052 dsa_master_ifindex = 0;
2053 }
2054
2055 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2056 }
2057
40695457 2058 return 1; /* needs reconfigure */
e1658632
YW		 2059}
2060
6625c39e 2061static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2062 int r;
2063
2064 assert(link);
2065 assert(link->manager);
2066 assert(message);
2067
6625c39e 2068 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2069 return 0;
2070
2071 /* When udevd is running, read the permanent hardware address after the interface is
2072 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2073 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2074 if (udev_available() && !link->dev)
2075 return 0;
2076
2077 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2078 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2079 if (r == -ENODATA)
2080 return 0;
2081 if (r < 0)
2082 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2083
2084 link->ethtool_permanent_hw_addr_read = true;
2085
2086 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2087 if (r < 0)
2088 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2089
2090 return 0;
2091}
2092
2093static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2094 int r;
2095
2096 assert(link);
2097 assert(link->manager);
2098 assert(message);
2099
2100 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2101 return 0;
2102
2103 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2104 if (r < 0) {
2105 if (r != -ENODATA)
2106 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2107
6625c39e
YW		 2108 /* Fallback to ethtool for older kernels. */
2109 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2110 if (r < 0)
2111 return r;
e1658632
YW		 2112 }
2113
2114 if (link->permanent_hw_addr.length > 0)
2115 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2116
40695457 2117 return 1; /* needs reconfigure */
e1658632
YW		 2118}
2119
0d411b7f 2120static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2121 struct hw_addr_data addr;
0d411b7f 2122 int r;
d93d655c 2123
0d411b7f
YW		 2124 assert(link);
2125 assert(message);
dfc58b47 2126
0d411b7f
YW		 2127 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2128 if (r < 0 && r != -ENODATA)
2129 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2130
e2bacccd 2131 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2132 if (r == -ENODATA)
2133 return 0;
2134 if (r < 0)
fe321d45 2135 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2136
e2bacccd 2137 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2138 return 0;
a61bb41c 2139
de0f1579 2140 if (link->hw_addr.length == 0)
e2bacccd 2141 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2142 else {
e2341b6b
DT		 2143 log_link_debug(link, "Hardware address is changed: %s %s %s",
2144 HW_ADDR_TO_STR(&link->hw_addr),
2145 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2146 HW_ADDR_TO_STR(&addr));
0d411b7f 2147
e74f1d07 2148 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2149 }
2150
e2bacccd
YW		 2151 link->hw_addr = addr;
2152
fe321d45
YW		 2153 if (!hw_addr_is_null(&link->hw_addr)) {
2154 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2155 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2156 /* bonding master and its slaves have the same hardware address. */
2157 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2158 if (r < 0)
2159 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2160 }
0d411b7f 2161
0a14f83a 2162 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2163 if (r < 0)
2164 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2165
0d411b7f 2166 r = ipv4ll_update_mac(link);
a61bb41c 2167 if (r < 0)
0d411b7f 2168 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2169
0d411b7f
YW		 2170 r = dhcp4_update_mac(link);
2171 if (r < 0)
2172 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2173
0d411b7f
YW		 2174 r = dhcp6_update_mac(link);
2175 if (r < 0)
2176 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2177
2178 r = radv_update_mac(link);
2179 if (r < 0)
2180 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2181
3be64aa4 2182 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2183 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2184 if (r < 0)
0d411b7f
YW		 2185 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2186 }
d236718c 2187
35778343
YW		 2188 if (link->lldp_rx) {
2189 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2190 if (r < 0)
c01b9b87
YW		 2191 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2192 }
2193
2194 if (link->lldp_tx) {
2195 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2196 if (r < 0)
2197 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2198 }
2199
40695457 2200 return 1; /* needs reconfigure */
0d411b7f 2201}
a61bb41c 2202
0d411b7f 2203static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2204 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2205 int r;
a61bb41c 2206
0d411b7f
YW		 2207 assert(link);
2208 assert(message);
2209
2210 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2211 if (r == -ENODATA)
2212 return 0;
2213 if (r < 0)
2214 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2215 if (mtu == 0)
2216 return 0;
0d411b7f 2217
717ba5fc
YW		 2218 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2219 if (r < 0 && r != -ENODATA)
2220 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2221
2222 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2223 if (r < 0 && r != -ENODATA)
2224 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2225
717ba5fc
YW		 2226 if (max_mtu == 0)
2227 max_mtu = UINT32_MAX;
2228
2229 link->min_mtu = min_mtu;
2230 link->max_mtu = max_mtu;
2231
0d411b7f
YW		 2232 if (link->original_mtu == 0) {
2233 link->original_mtu = mtu;
717ba5fc
YW		 2234 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2235 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2236 }
2237
717ba5fc
YW		 2238 if (link->mtu == mtu)
2239 return 0;
2240
b5d0fd1e 2241 if (link->mtu != 0)
e2341b6b
DT		 2242 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2243 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2244 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2245
2246 link->mtu = mtu;
2247
2248 if (link->dhcp_client) {
2249 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2250 if (r < 0)
0d411b7f
YW		 2251 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2252 }
a61bb41c 2253
0d411b7f
YW		 2254 if (link->radv) {
2255 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2256 if (r < 0)
0d411b7f 2257 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2258 }
2259
2260 return 0;
dd3efc09 2261}
fe8db0c5 2262
0d411b7f
YW		 2263static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2264 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2265 int r;
2266
2267 assert(link);
2268 assert(message);
2269
2270 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2271 if (r == -ENODATA)
2368ff81 2272 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2273 * interface has no alternative name. */
2274 return 0;
2275 if (r < 0)
0d411b7f
YW		 2276 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2277
1b345c1e
YW		 2278 if (strv_equal(altnames, link->alternative_names))
2279 return 0;
2280
0d411b7f
YW		 2281 STRV_FOREACH(n, link->alternative_names)
2282 hashmap_remove(link->manager->links_by_name, *n);
2283
2284 strv_free_and_replace(link->alternative_names, altnames);
2285
2286 STRV_FOREACH(n, link->alternative_names) {
2287 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2288 if (r < 0)
2289 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2290 }
2291
40695457 2292 return 1; /* needs reconfigure */
0d411b7f
YW		 2293}
2294
2295static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2296 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2297 const char *ifname;
2298 int r;
2299
2300 assert(link);
2301 assert(message);
2302
2303 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2304 if (r == -ENODATA)
7802194a 2305 /* Hmm?? But ok. */
0d411b7f
YW		 2306 return 0;
2307 if (r < 0)
2308 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2309
2310 if (streq(ifname, link->ifname))
2311 return 0;
2312
01afd0f7
YW		 2313 r = format_ifname(link->ifindex, ifname_from_index);
2314 if (r < 0)
2315 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2316
2317 if (!streq(ifname, ifname_from_index)) {
2318 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2319 "with the name currently configured on the actual interface '%s'. Ignoring.",
2320 ifname, ifname_from_index);
2321 return 0;
2322 }
2323
0d411b7f
YW		 2324 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2325
2326 hashmap_remove(link->manager->links_by_name, link->ifname);
2327
2328 r = free_and_strdup(&link->ifname, ifname);
2329 if (r < 0)
2330 return log_oom_debug();
2331
2332 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2333 if (r < 0)
2334 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2335
54d1fdb2
YW		 2336 if (link->dhcp_client) {
2337 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2338 if (r < 0)
2339 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2340 }
2341
2342 if (link->dhcp6_client) {
2343 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2344 if (r < 0)
2345 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2346 }
2347
2348 if (link->ndisc) {
2349 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2350 if (r < 0)
2351 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2352 }
2353
2354 if (link->dhcp_server) {
2355 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2356 if (r < 0)
2357 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2358 }
2359
2360 if (link->radv) {
2361 r = sd_radv_set_ifname(link->radv, link->ifname);
2362 if (r < 0)
2363 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2364 }
2365
35778343
YW		 2366 if (link->lldp_rx) {
2367 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2368 if (r < 0)
c01b9b87
YW		 2369 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2370 }
2371
2372 if (link->lldp_tx) {
2373 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2374 if (r < 0)
2375 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2376 }
2377
2378 if (link->ipv4ll) {
2379 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2380 if (r < 0)
2381 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2382 }
2383
86173383
YW		 2384 r = ipv4acd_set_ifname(link);
2385 if (r < 0)
2386 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2387
40695457 2388 return 1; /* needs reconfigure */
0d411b7f
YW		 2389}
2390
2391static int link_update(Link *link, sd_netlink_message *message) {
40695457 2392 bool needs_reconfigure = false;
0d411b7f
YW		 2393 int r;
2394
2395 assert(link);
2396 assert(message);
2397
2398 r = link_update_name(link, message);
2399 if (r < 0)
2400 return r;
40695457 2401 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2402
2403 r = link_update_alternative_names(link, message);
2404 if (r < 0)
2405 return r;
40695457 2406 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2407
2408 r = link_update_mtu(link, message);
2409 if (r < 0)
2410 return r;
2411
e1658632
YW		 2412 r = link_update_driver(link, message);
2413 if (r < 0)
2414 return r;
40695457 2415 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2416
2417 r = link_update_permanent_hardware_address(link, message);
2418 if (r < 0)
2419 return r;
40695457 2420 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2421
0d411b7f
YW		 2422 r = link_update_hardware_address(link, message);
2423 if (r < 0)
2424 return r;
40695457 2425 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2426
2427 r = link_update_master(link, message);
2428 if (r < 0)
2429 return r;
2430
7d0d832d
YW		 2431 r = link_update_ipv6ll_addrgen_mode(link, message);
2432 if (r < 0)
2433 return r;
2434
40695457
YW		 2435 r = link_update_flags(link, message);
2436 if (r < 0)
2437 return r;
2438
11cee6ef
YW		 2439 r = link_update_bridge_vlan(link, message);
2440 if (r < 0)
2441 return r;
2442
40695457 2443 return needs_reconfigure;
0d411b7f
YW		 2444}
2445
0c9ee5d5
YW		 2446static Link *link_drop_or_unref(Link *link) {
2447 if (!link)
2448 return NULL;
2449 if (!link->manager)
2450 return link_unref(link);
2451 return link_drop(link);
2452}
2453
2454DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2455
2456static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2457 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2458 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2459 unsigned short iftype;
2460 int r, ifindex;
0c9ee5d5
YW		 2461
2462 assert(manager);
2463 assert(message);
2464 assert(ret);
2465
0c9ee5d5
YW		 2466 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2467 if (r < 0)
0d411b7f 2468 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2469 else if (ifindex <= 0)
0d411b7f 2470 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2471
2472 r = sd_rtnl_message_link_get_type(message, &iftype);
2473 if (r < 0)
0d411b7f 2474 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2475
2476 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2477 if (r < 0)
0d411b7f 2478 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2479
2480 /* check for link kind */
2481 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2482 if (r >= 0) {
0d411b7f
YW		 2483 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2484 if (r < 0 && r != -ENODATA)
2485 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2486 r = sd_netlink_message_exit_container(message);
2487 if (r < 0)
0d411b7f 2488 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2489 }
2490
4c78dc17
YW		 2491 if (!manager->test_mode) {
2492 /* Do not update state files when running in test mode. */
2493 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2494 return log_oom_debug();
0d411b7f 2495
4c78dc17
YW		 2496 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2497 return log_oom_debug();
0d411b7f 2498
4c78dc17
YW		 2499 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2500 return log_oom_debug();
2501 }
0d411b7f 2502
0c9ee5d5
YW		 2503 link = new(Link, 1);
2504 if (!link)
2505 return -ENOMEM;
2506
2507 *link = (Link) {
2508 .n_ref = 1,
2509 .state = LINK_STATE_PENDING,
2510 .online_state = _LINK_ONLINE_STATE_INVALID,
2511 .ifindex = ifindex,
2512 .iftype = iftype,
2513 .ifname = TAKE_PTR(ifname),
2514 .kind = TAKE_PTR(kind),
2515
11cee6ef
YW		 2516 .bridge_vlan_pvid = UINT16_MAX,
2517
7d0d832d
YW		 2518 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2519
0d411b7f
YW		 2520 .state_file = TAKE_PTR(state_file),
2521 .lease_file = TAKE_PTR(lease_file),
2522 .lldp_file = TAKE_PTR(lldp_file),
2523
0c9ee5d5
YW		 2524 .n_dns = UINT_MAX,
2525 .dns_default_route = -1,
2526 .llmnr = _RESOLVE_SUPPORT_INVALID,
2527 .mdns = _RESOLVE_SUPPORT_INVALID,
2528 .dnssec_mode = _DNSSEC_MODE_INVALID,
2529 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2530 };
2531
6eab614d 2532 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2533 if (r < 0)
0d411b7f 2534 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2535
2536 link->manager = manager;
2537
0d411b7f 2538 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2539 if (r < 0)
0d411b7f 2540 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2541
8a77e245
YW		 2542 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2543 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2544
9c5b8d46
AŠ		 2545 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2546 * message arrived too early. Request the wireless link information again.
2547 */
2548 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2549 r = link_get_wlan_interface(link);
2550 if (r < 0)
2551 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2552 }
2553
0c9ee5d5 2554 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2555 return 0;
2556}
2557
0d411b7f 2558int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2559 Link *link = NULL;
2560 NetDev *netdev = NULL;
2561 uint16_t type;
2562 const char *name;
2563 int r, ifindex;
2564
2565 assert(rtnl);
2566 assert(message);
0d411b7f 2567 assert(manager);
3be9d62a
YW		 2568
2569 if (sd_netlink_message_is_error(message)) {
2570 r = sd_netlink_message_get_errno(message);
2571 if (r < 0)
2572 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2573
2574 return 0;
2575 }
2576
2577 r = sd_netlink_message_get_type(message, &type);
2578 if (r < 0) {
2579 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2580 return 0;
2581 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2582 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2583 return 0;
2584 }
2585
2586 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2587 if (r < 0) {
2588 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2589 return 0;
2590 } else if (ifindex <= 0) {
2591 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2592 return 0;
2593 }
2594
2595 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2596 if (r < 0) {
2597 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2598 return 0;
2599 }
2600
6eab614d 2601 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2602 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2603
2604 switch (type) {
2605 case RTM_NEWLINK:
0d411b7f
YW		 2606 if (netdev) {
2607 /* netdev exists, so make sure the ifindex matches */
2608 r = netdev_set_ifindex(netdev, message);
2609 if (r < 0) {
66141164 2610 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2611 return 0;
2612 }
2613 }
2614
3be9d62a
YW		 2615 if (!link) {
2616 /* link is new, so add it */
0d411b7f 2617 r = link_new(manager, message, &link);
3be9d62a 2618 if (r < 0) {
0d411b7f 2619 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2620 return 0;
2621 }
3be9d62a 2622
0d411b7f 2623 r = link_update(link, message);
3be9d62a 2624 if (r < 0) {
66141164 2625 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2626 link_enter_failed(link);
3be9d62a
YW		 2627 return 0;
2628 }
3be9d62a 2629
0d411b7f
YW		 2630 r = link_check_initialized(link);
2631 if (r < 0) {
66141164 2632 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2633 link_enter_failed(link);
2634 return 0;
2635 }
2636 } else {
2637 r = link_update(link, message);
2638 if (r < 0) {
66141164 2639 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2640 link_enter_failed(link);
2641 return 0;
2642 }
40695457
YW		 2643 if (r > 0) {
2644 r = link_reconfigure_impl(link, /* force = */ false);
2645 if (r < 0) {
2646 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2647 link_enter_failed(link);
2648 return 0;
2649 }
2650 }
3be9d62a 2651 }
3be9d62a
YW		 2652 break;
2653
2654 case RTM_DELLINK:
2655 link_drop(link);
2656 netdev_drop(netdev);
3be9d62a
YW		 2657 break;
2658
2659 default:
04499a70 2660 assert_not_reached();
3be9d62a
YW		 2661 }
2662
2663 return 1;
2664}
2665
79c6e114
YW		 2666int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2667 uint16_t message_type;
2668 int r;
2669
2670 assert(m);
2671 assert(link);
2672 assert(error_msg);
2673
2674 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2675 return 0;
2676
2677 r = sd_netlink_message_get_errno(m);
2678 if (r < 0) {
2679 log_link_message_warning_errno(link, m, r, error_msg);
2680 link_enter_failed(link);
2681 return 0;
2682 }
2683
2684 r = sd_netlink_message_get_type(m, &message_type);
2685 if (r < 0) {
2686 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2687 return 0;
2688 }
2689 if (message_type != RTM_NEWLINK) {
2690 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2691 return 0;
2692 }
2693
2694 r = link_update(link, m);
2695 if (r < 0) {
2696 link_enter_failed(link);
2697 return 0;
2698 }
2699
2700 return 1;
2701}
2702
2703int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2704 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2705 int r;
2706
2707 assert(link);
2708 assert(link->manager);
2709 assert(link->manager->rtnl);
2710 assert(callback);
2711
2712 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2713 if (r < 0)
2714 return r;
2715
2716 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2717 link_netlink_destroy_callback, link);
2718 if (r < 0)
2719 return r;
2720
2721 link_ref(link);
2722 return 0;
2723}
2724
fe8db0c5 2725static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2726 [LINK_STATE_PENDING] = "pending",
bd08ce56 2727 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2728 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2729 [LINK_STATE_CONFIGURED] = "configured",
2730 [LINK_STATE_UNMANAGED] = "unmanaged",
2731 [LINK_STATE_FAILED] = "failed",
2732 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2733};
2734
2735DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2736
2737int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2738 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2739 static const char* map[] = {
2740 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2741 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2742 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2743 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2744 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2745 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2746 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2747 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2748 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2749 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2750 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2751 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2752 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2753 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2754 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2755 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2756 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2757 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2758 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2759 };
2760
2761 assert(ret);
2762
2763 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2764 if (FLAGS_SET(flags, 1 << i) && map[i])
2765 if (!strextend_with_separator(&str, ",", map[i]))
2766 return -ENOMEM;
7ae55b78
YW		 2767
2768 *ret = TAKE_PTR(str);
2769 return 0;
2770}
2771
2772static const char * const kernel_operstate_table[] = {
2773 [IF_OPER_UNKNOWN] = "unknown",
2774 [IF_OPER_NOTPRESENT] = "not-present",
2775 [IF_OPER_DOWN] = "down",
2776 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2777 [IF_OPER_TESTING] = "testing",
2778 [IF_OPER_DORMANT] = "dormant",
2779 [IF_OPER_UP] = "up",
2780};
2781
2782DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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