]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
network/dhcp6: deem DHCPv6 configuration to be finished even if no IA_NA is provided
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
176b8be1 3#include <net/if.h>
9aa5d8ba 4#include <netinet/in.h>
f579559b 5#include <linux/if.h>
8f815e8b 6#include <linux/if_arp.h>
518cd6b5 7#include <linux/if_link.h>
2a0d07d6 8#include <linux/netdevice.h>
8430841b 9#include <sys/socket.h>
4cc7a82c 10#include <unistd.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
8a77e245 13#include "arphrd-util.h"
c0267a59 14#include "batadv.h"
737f1405
YW
15#include "bond.h"
16#include "bridge.h"
1346b1f0 17#include "bus-util.h"
3be9d62a
YW
18#include "device-private.h"
19#include "device-util.h"
bd91b83e 20#include "dhcp-lease-internal.h"
686d13b9 21#include "env-file.h"
4bb7cc82 22#include "ethtool-util.h"
6706ce2f 23#include "event-util.h"
3ffd4af2 24#include "fd-util.h"
cf1d700d 25#include "fileio.h"
176b8be1 26#include "format-util.h"
af664001 27#include "fs-util.h"
e2341b6b 28#include "glyph-util.h"
3ae6b3bf 29#include "logarithm.h"
ef118d00 30#include "missing_network.h"
cf1d700d 31#include "netlink-util.h"
c6f7c917 32#include "network-internal.h"
fb486c90 33#include "networkd-address-label.h"
093e3533 34#include "networkd-address.h"
9671ae9d 35#include "networkd-bridge-fdb.h"
ff9e0783 36#include "networkd-bridge-mdb.h"
11cee6ef 37#include "networkd-bridge-vlan.h"
3ddcbeea 38#include "networkd-can.h"
d5ebcf65 39#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 40#include "networkd-dhcp-server.h"
ca5ad760
YW
41#include "networkd-dhcp4.h"
42#include "networkd-dhcp6.h"
76a86ffd 43#include "networkd-ipv4acd.h"
ca5ad760 44#include "networkd-ipv4ll.h"
76c5a0f2 45#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW
46#include "networkd-link-bus.h"
47#include "networkd-link.h"
8e1ad1ea 48#include "networkd-lldp-tx.h"
23f53b99 49#include "networkd-manager.h"
1e7a0e21 50#include "networkd-ndisc.h"
e4a71bf3 51#include "networkd-neighbor.h"
75156ccb 52#include "networkd-nexthop.h"
19d9a5ad 53#include "networkd-queue.h"
7465dd22 54#include "networkd-radv.h"
fc35a9f8 55#include "networkd-route-util.h"
3b6a3bde 56#include "networkd-route.h"
bce67bbe 57#include "networkd-routing-policy-rule.h"
0fa8ee6c 58#include "networkd-setlink.h"
19d9a5ad 59#include "networkd-sriov.h"
3b5a4fc6 60#include "networkd-state-file.h"
19d9a5ad 61#include "networkd-sysctl.h"
986b2514 62#include "networkd-wifi.h"
cf1d700d
TG
63#include "set.h"
64#include "socket-util.h"
15a5e950 65#include "stdio-util.h"
8b43440b 66#include "string-table.h"
51517f9e 67#include "strv.h"
34658df2 68#include "tc.h"
e4de7287 69#include "tmpfile-util.h"
af7a86b8 70#include "tuntap.h"
299ad32d 71#include "udev-util.h"
737f1405 72#include "vrf.h"
fc2f9534 73
2278d9f6
YW
74void link_required_operstate_for_online(Link *link, LinkOperationalStateRange *ret) {
75 assert(link);
76 assert(ret);
77
78 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
a853cc99 79 /* If explicitly specified, use it as is. */
2278d9f6 80 *ret = link->network->required_operstate_for_online;
3255bda6 81 else if (link->iftype == ARPHRD_CAN)
a853cc99 82 /* CAN devices do not support addressing, hence defaults to 'carrier'. */
3255bda6
YW
83 *ret = (const LinkOperationalStateRange) {
84 .min = LINK_OPERSTATE_CARRIER,
85 .max = LINK_OPERSTATE_CARRIER,
86 };
a853cc99
YW
87 else if (link->network && link->network->bond)
88 /* Bonding slaves do not support addressing. */
89 *ret = (const LinkOperationalStateRange) {
90 .min = LINK_OPERSTATE_ENSLAVED,
91 .max = LINK_OPERSTATE_ENSLAVED,
92 };
93 else if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
94 /* Some of slave interfaces may be offline. */
95 *ret = (const LinkOperationalStateRange) {
96 .min = LINK_OPERSTATE_DEGRADED_CARRIER,
97 .max = LINK_OPERSTATE_ROUTABLE,
98 };
2278d9f6
YW
99 else
100 *ret = LINK_OPERSTATE_RANGE_DEFAULT;
101}
102
a853cc99
YW
103AddressFamily link_required_family_for_online(Link *link) {
104 assert(link);
105
106 if (link->network && link->network->required_family_for_online >= 0)
107 return link->network->required_family_for_online;
108
109 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
110 /* If RequiredForOnline= is explicitly specified, defaults to no. */
111 return ADDRESS_FAMILY_NO;
112
113 if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
114 /* As the minimum required operstate for master interfaces is 'degraded-carrier',
115 * we should request an address assigned to the link for backward compatibility. */
116 return ADDRESS_FAMILY_YES;
117
118 return ADDRESS_FAMILY_NO;
119}
120
5e0534f1 121bool link_ipv6_enabled(Link *link) {
439689c6
SS
122 assert(link);
123
124 if (!socket_ipv6_is_supported())
125 return false;
126
5fb5fae9 127 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY
128 return false;
129
5fb5fae9
YW
130 if (!link->network)
131 return false;
132
133 if (link->network->bond)
af9ba57a
YW
134 return false;
135
bd7e0a3f 136 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW
137 return true;
138
139 if (network_has_static_ipv6_configurations(link->network))
140 return true;
141
142 return false;
439689c6
SS
143}
144
fc35a9f8
YW
145bool link_has_ipv6_connectivity(Link *link) {
146 LinkAddressState ipv6_address_state;
147
148 assert(link);
149
150 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
151
152 switch (ipv6_address_state) {
153 case LINK_ADDRESS_STATE_ROUTABLE:
154 /* If the interface has a routable IPv6 address, then we assume yes. */
155 return true;
156
157 case LINK_ADDRESS_STATE_DEGRADED:
158 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
159 * there is an IPv6 default gateway. */
160 return link_has_default_gateway(link, AF_INET6);
161
162 case LINK_ADDRESS_STATE_OFF:
163 /* No IPv6 address. */
164 return false;
165
166 default:
167 assert_not_reached();
168 }
169}
170
e33232d4 171static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW
172 assert(link);
173
d8d4db58
YW
174 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
175 return false;
176
2fd3908b
YW
177 if (!link->network)
178 return allow_unmanaged;
7191a57a 179
baa95d22
YW
180 if (!link->network->configure_without_carrier) {
181 if (link->set_flags_messages > 0)
182 return false;
183
184 if (!link_has_carrier(link))
185 return false;
186 }
7191a57a 187
0fa8ee6c
YW
188 if (link->set_link_messages > 0)
189 return false;
190
112a0972
YW
191 if (!link->activated)
192 return false;
112a0972 193
7191a57a
YW
194 return true;
195}
196
e33232d4
YW
197bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
198 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
199}
200
15761549
YW
201void link_ntp_settings_clear(Link *link) {
202 link->ntp = strv_free(link->ntp);
203}
204
205void link_dns_settings_clear(Link *link) {
f5fbe71d 206 if (link->n_dns != UINT_MAX)
e77bd3fd
YW
207 for (unsigned i = 0; i < link->n_dns; i++)
208 in_addr_full_free(link->dns[i]);
15761549 209 link->dns = mfree(link->dns);
f5fbe71d 210 link->n_dns = UINT_MAX;
15761549 211
6e4571f0
YW
212 link->search_domains = ordered_set_free(link->search_domains);
213 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW
214
215 link->dns_default_route = -1;
216 link->llmnr = _RESOLVE_SUPPORT_INVALID;
217 link->mdns = _RESOLVE_SUPPORT_INVALID;
218 link->dnssec_mode = _DNSSEC_MODE_INVALID;
219 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
220
221 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
222}
223
1a6bb31f
YW
224static void link_free_engines(Link *link) {
225 if (!link)
226 return;
227
228 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 229
1a6bb31f
YW
230 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
231 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 232 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 233
35778343 234 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 235 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 236
5385e5f9
YW
237 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
238
1a6bb31f 239 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 240
1a6bb31f 241 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 242 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 243
1a6bb31f 244 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW
245 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
246 ndisc_flush(link);
247
1a6bb31f
YW
248 link->radv = sd_radv_unref(link->radv);
249}
250
8301aa0b 251static Link *link_free(Link *link) {
8301aa0b 252 assert(link);
f579559b 253
15761549
YW
254 link_ntp_settings_clear(link);
255 link_dns_settings_clear(link);
256
8eec0b9d 257 link->neighbors = set_free(link->neighbors);
8eec0b9d 258 link->addresses = set_free(link->addresses);
3a67b8bb
YW
259 link->qdiscs = set_free(link->qdiscs);
260 link->tclasses = set_free(link->tclasses);
adda1ed9 261
a27588d4 262 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 263
1a6bb31f 264 link_free_engines(link);
49699bac 265
b0ff6dea 266 set_free(link->sr_iov_virt_port_ifindices);
c166a070 267 free(link->ifname);
572b21d9 268 strv_free(link->alternative_names);
ceac4078 269 free(link->kind);
8d968fdd 270 free(link->ssid);
6706ce2f 271 free(link->previous_ssid);
c643bda5 272 free(link->driver);
6cad256d 273
a34e58d4
YW
274 unlink_and_free(link->lease_file);
275 unlink_and_free(link->lldp_file);
276 unlink_and_free(link->state_file);
c166a070 277
8de56fb3 278 sd_device_unref(link->dev);
9aa2585e 279 netdev_unref(link->netdev);
b5db00e5 280
0d4ad91d 281 hashmap_free(link->bound_to_links);
0d4ad91d
AR
282 hashmap_free(link->bound_by_links);
283
5f707e12 284 set_free_with_destructor(link->slaves, link_unref);
033295c1 285
c9c908a6
YW
286 network_unref(link->network);
287
6706ce2f
YW
288 sd_event_source_disable_unref(link->carrier_lost_timer);
289
8301aa0b 290 return mfree(link);
14b746f7
TG
291}
292
8301aa0b 293DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 294
6eab614d 295int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 296 Link *link;
11a7f229
TG
297
298 assert(m);
c2aed128
YW
299
300 if (ifindex <= 0)
301 return -EINVAL;
11a7f229 302
6eab614d 303 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG
304 if (!link)
305 return -ENODEV;
306
0b54c870
YW
307 if (ret)
308 *ret = link;
309 return 0;
310}
311
312int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
313 Link *link;
314
315 assert(m);
316 assert(ifname);
11a7f229 317
0b54c870
YW
318 link = hashmap_get(m->links_by_name, ifname);
319 if (!link)
320 return -ENODEV;
321
322 if (ret)
323 *ret = link;
11a7f229
TG
324 return 0;
325}
326
fe321d45
YW
327int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
328 Link *link;
329
330 assert(m);
331 assert(hw_addr);
332
333 link = hashmap_get(m->links_by_hw_addr, hw_addr);
334 if (!link)
335 return -ENODEV;
336
337 if (ret)
338 *ret = link;
339 return 0;
340}
341
81357285
YW
342int link_get_master(Link *link, Link **ret) {
343 assert(link);
344 assert(link->manager);
345 assert(ret);
346
347 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
348 return -ENODEV;
349
6eab614d 350 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW
351}
352
af9ba57a 353void link_set_state(Link *link, LinkState state) {
e331e246
TG
354 assert(link);
355
356 if (link->state == state)
357 return;
358
0beb9542
YW
359 log_link_debug(link, "State changed: %s -> %s",
360 link_state_to_string(link->state),
361 link_state_to_string(state));
362
e331e246
TG
363 link->state = state;
364
365 link_send_changed(link, "AdministrativeState", NULL);
9092113d 366 link_dirty(link);
e331e246
TG
367}
368
2a99eed0 369int link_stop_engines(Link *link, bool may_keep_dhcp) {
372acaad 370 int r, ret = 0;
111bb8f9
TG
371
372 assert(link);
373 assert(link->manager);
374 assert(link->manager->event);
375
80060352
ZJS
376 bool keep_dhcp = may_keep_dhcp &&
377 link->network &&
76a86ffd 378 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS
379 (link->manager->restarting ||
380 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
381
84add3cd 382 if (!keep_dhcp) {
372acaad
YW
383 r = sd_dhcp_client_stop(link->dhcp_client);
384 if (r < 0)
385 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m"));
111bb8f9
TG
386 }
387
372acaad
YW
388 r = sd_dhcp_server_stop(link->dhcp_server);
389 if (r < 0)
390 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 server: %m"));
2a99eed0 391
372acaad
YW
392 r = sd_lldp_rx_stop(link->lldp_rx);
393 if (r < 0)
394 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Rx: %m"));
c01b9b87 395
372acaad
YW
396 r = sd_lldp_tx_stop(link->lldp_tx);
397 if (r < 0)
398 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Tx: %m"));
9cc65242 399
372acaad
YW
400 r = sd_ipv4ll_stop(link->ipv4ll);
401 if (r < 0)
402 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m"));
dd43110f 403
372acaad
YW
404 r = ipv4acd_stop(link);
405 if (r < 0)
406 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 ACD client: %m"));
051e77ca 407
372acaad
YW
408 r = sd_dhcp6_client_stop(link->dhcp6_client);
409 if (r < 0)
410 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m"));
4138fb2c 411
372acaad
YW
412 r = dhcp_pd_remove(link, /* only_marked = */ false);
413 if (r < 0)
414 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not remove DHCPv6 PD addresses and routes: %m"));
1633c457 415
372acaad
YW
416 r = ndisc_stop(link);
417 if (r < 0)
418 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Discovery: %m"));
4138fb2c 419
259c65f3
YW
420 ndisc_flush(link);
421
372acaad
YW
422 r = sd_radv_stop(link->radv);
423 if (r < 0)
424 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Advertisement: %m"));
7465dd22 425
372acaad 426 return ret;
111bb8f9
TG
427}
428
b22d8a00 429void link_enter_failed(Link *link) {
c2eb7753
YW
430 int r;
431
ef1ba606 432 assert(link);
f882c247 433
370e9930 434 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG
435 return;
436
6a7a4e4d 437 log_link_warning(link, "Failed");
449f7554 438
e331e246 439 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 440
c2eb7753
YW
441 if (!ratelimit_below(&link->automatic_reconfigure_ratelimit)) {
442 log_link_warning(link, "The interface entered the failed state frequently, refusing to reconfigure it automatically.");
443 goto stop;
444 }
445
446 log_link_info(link, "Trying to reconfigure the interface.");
447 r = link_reconfigure(link, /* force = */ true);
448 if (r < 0) {
449 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
450 goto stop;
451 }
452
453 return;
454
455stop:
456 (void) link_stop_engines(link, /* may_keep_dhcp = */ false);
f882c247
TG
457}
458
6accfd31
DA
459void link_check_ready(Link *link) {
460 Address *a;
6accfd31
DA
461
462 assert(link);
463
5f58af25
YW
464 if (link->state == LINK_STATE_CONFIGURED)
465 return;
466
d19b9939
YW
467 if (link->state != LINK_STATE_CONFIGURING)
468 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA
469
470 if (!link->network)
a7f07cbe 471 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 472
7558f9e7
YW
473 if (!link->tc_configured)
474 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 475
a7f07cbe
YW
476 if (link->set_link_messages > 0)
477 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
478
479 if (!link->activated)
480 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
481
24b9c341 482 if (link->iftype == ARPHRD_CAN)
7558f9e7 483 /* let's shortcut things for CAN which doesn't need most of checks below. */
24b9c341 484 goto ready;
7558f9e7 485
879377ca
YW
486 if (!link->stacked_netdevs_created)
487 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
488
76c5a0f2 489 if (!link->static_addresses_configured)
d19b9939 490 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 491
354bc760
YW
492 if (!link->static_address_labels_configured)
493 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
494
e5b35bf6
YW
495 if (!link->static_bridge_fdb_configured)
496 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
497
ff9e0783
YW
498 if (!link->static_bridge_mdb_configured)
499 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
500
fdeba3f5
YW
501 if (!link->static_ipv6_proxy_ndp_configured)
502 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
503
40ca350e
YW
504 if (!link->static_neighbors_configured)
505 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
506
d19b9939
YW
507 if (!link->static_nexthops_configured)
508 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 509
76c5a0f2
YW
510 if (!link->static_routes_configured)
511 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
512
0e5ef6be 513 if (!link->static_routing_policy_rules_configured)
d19b9939 514 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 515
d19b9939
YW
516 if (!link->sr_iov_configured)
517 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 518
4bcb8625
YW
519 /* IPv6LL is assigned after the link gains its carrier. */
520 if (!link->network->configure_without_carrier &&
521 link_ipv6ll_enabled(link) &&
522 !in6_addr_is_set(&link->ipv6ll_address))
523 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
524
9e7d91ed
YW
525 /* All static addresses must be ready. */
526 bool has_static_address = false;
527 SET_FOREACH(a, link->addresses) {
528 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
529 continue;
530 if (!address_is_ready(a))
531 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
532 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
533 has_static_address = true;
534 }
535
536 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
537 if (has_static_address)
538 goto ready;
539
5f950e56
YW
540 /* If no dynamic addressing protocol enabled, assume the interface is ready.
541 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
542 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
543 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
544 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
545 goto ready;
546
547 bool ipv4ll_ready =
548 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
549 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
550 bool dhcp4_ready =
551 link_dhcp4_enabled(link) && link->dhcp4_configured &&
552 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
553 bool dhcp6_ready =
554 link_dhcp6_enabled(link) && link->dhcp6_configured &&
555 (!link->network->dhcp6_use_address ||
556 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
557 bool dhcp_pd_ready =
558 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
559 (!link->network->dhcp_pd_assign ||
560 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
561 bool ndisc_ready =
562 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
563 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
564 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
565
195b83ed
YW
566 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
567 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
568 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 569 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
195b83ed
YW
570 if (!dhcp4_ready)
571 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
572 if (!dhcp_pd_ready)
573 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
574 }
575
576 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 577 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
195b83ed
YW
578 if (!dhcp6_ready)
579 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
580 if (!dhcp_pd_ready)
581 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
582 }
583 }
584
5f950e56
YW
585 /* At least one dynamic addressing protocol is finished. */
586 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
587 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
588
589 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
590 __func__,
591 yes_no(ipv4ll_ready),
592 yes_no(dhcp4_ready),
593 yes_no(dhcp6_ready),
594 yes_no(dhcp_pd_ready),
595 yes_no(ndisc_ready));
596
597ready:
29836c16 598 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA
599}
600
97108953 601static int link_request_static_configs(Link *link) {
f882c247
TG
602 int r;
603
604 assert(link);
605 assert(link->network);
f5be5601 606 assert(link->state != _LINK_STATE_INVALID);
f882c247 607
354bc760 608 r = link_request_static_addresses(link);
0e5ef6be
YW
609 if (r < 0)
610 return r;
611
354bc760 612 r = link_request_static_address_labels(link);
f3ef324d
YW
613 if (r < 0)
614 return r;
e4a71bf3 615
e5b35bf6
YW
616 r = link_request_static_bridge_fdb(link);
617 if (r < 0)
618 return r;
619
9a038aac
YW
620 r = link_request_static_bridge_mdb(link);
621 if (r < 0)
622 return r;
623
fdeba3f5
YW
624 r = link_request_static_ipv6_proxy_ndp_addresses(link);
625 if (r < 0)
626 return r;
627
40ca350e 628 r = link_request_static_neighbors(link);
682c65b0
YW
629 if (r < 0)
630 return r;
bd6379ec 631
76c5a0f2 632 r = link_request_static_nexthops(link, false);
fe2bc17c
YW
633 if (r < 0)
634 return r;
f882c247 635
76c5a0f2
YW
636 r = link_request_static_routes(link, false);
637 if (r < 0)
638 return r;
639
640 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW
641 if (r < 0)
642 return r;
d4cdbea5 643
f882c247
TG
644 return 0;
645}
646
1187fc33
YW
647static int link_request_stacked_netdevs(Link *link) {
648 NetDev *netdev;
e16e4b3b
DS
649 int r;
650
651 assert(link);
652
1187fc33 653 link->stacked_netdevs_created = false;
e16e4b3b 654
1187fc33 655 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 656 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW
657 if (r < 0)
658 return r;
659 }
e16e4b3b 660
bb916f35 661 if (link->create_stacked_netdev_messages == 0) {
1187fc33 662 link->stacked_netdevs_created = true;
bb916f35
YW
663 link_check_ready(link);
664 }
e16e4b3b
DS
665
666 return 0;
667}
668
8566df79 669static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG
670 int r;
671
672 assert(link);
673
0f96a823
YW
674 r = radv_start(link);
675 if (r < 0)
676 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 677
294f129b
YW
678 r = ndisc_start(link);
679 if (r < 0)
680 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 681
294f129b
YW
682 r = dhcp6_start(link);
683 if (r < 0)
684 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 685
e7ab854c
TG
686 return 0;
687}
688
8566df79 689static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG
690 int r;
691
692 assert(link);
ff254138
TG
693 assert(link->manager);
694 assert(link->manager->event);
695
0107b769 696 if (link->dhcp_client) {
294f129b 697 r = dhcp4_start(link);
0107b769 698 if (r < 0)
294f129b 699 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 700
ccffa166 701 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 702
ccffa166 703 } else if (link->ipv4ll) {
59c27231
AK
704 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
705 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
706 if (r < 0)
707 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
708 }
709
5c1d3fc9 710 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP
711 if (r < 0)
712 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW
713
714 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL
715 }
716
ab486ef4
YW
717 if (link->dhcp_server) {
718 r = sd_dhcp_server_start(link->dhcp_server);
719 if (r < 0)
720 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
721 }
722
76a86ffd
YW
723 r = ipv4acd_start(link);
724 if (r < 0)
725 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
726
6fc25497
SS
727 return 0;
728}
729
8566df79 730static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS
731 int r;
732
733 assert(link);
0f96a823 734 assert(link->network);
6fc25497 735
8566df79 736 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS
737 if (r < 0)
738 return r;
739
94876904 740 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 741 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS
742 if (r < 0)
743 return r;
744 }
745
a27588d4 746 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW
747 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
748 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
749 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
750 * below will be called in radv_start(). */
a27588d4 751 r = dhcp_request_prefix_delegation(link);
0f96a823 752 if (r < 0)
a27588d4 753 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW
754 }
755
c01b9b87
YW
756 if (link->lldp_tx) {
757 r = sd_lldp_tx_start(link->lldp_tx);
758 if (r < 0)
759 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
760 }
8e1ad1ea 761
35778343
YW
762 if (link->lldp_rx) {
763 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW
764 if (r < 0)
765 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
766 }
767
ff254138
TG
768 return 0;
769}
770
7657ec3e 771int link_ipv6ll_gained(Link *link) {
0c9ee5d5 772 int r;
deb2e523 773
0c9ee5d5 774 assert(link);
deb2e523 775
0c9ee5d5 776 log_link_info(link, "Gained IPv6LL");
deb2e523 777
7657ec3e
YW
778 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
779 return 0;
0c9ee5d5 780
7657ec3e
YW
781 r = link_acquire_dynamic_ipv6_conf(link);
782 if (r < 0)
783 return r;
0c9ee5d5 784
7657ec3e 785 link_check_ready(link);
0c9ee5d5 786 return 0;
deb2e523
TG
787}
788
112a0972 789int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR
790 bool required_up = false;
791 bool link_is_up = false;
852a3916 792 Link *l;
0d4ad91d
AR
793
794 assert(link);
795
ad82f0c3
YW
796 /* If at least one interface in bound_to_links has carrier, then make this interface up.
797 * If all interfaces in bound_to_links do not, then make this interface down. */
798
0d4ad91d
AR
799 if (hashmap_isempty(link->bound_to_links))
800 return 0;
801
802 if (link->flags & IFF_UP)
803 link_is_up = true;
804
852a3916 805 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR
806 if (link_has_carrier(l)) {
807 required_up = true;
808 break;
809 }
810
852a3916 811 if (!required_up && link_is_up)
68f52063 812 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 813 if (required_up && !link_is_up)
68f52063 814 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR
815
816 return 0;
817}
818
819static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR
820 Link *l;
821 int r;
822
823 assert(link);
824
ad82f0c3
YW
825 /* Update up or down state of interfaces which depend on this interface's carrier state. */
826
0d4ad91d
AR
827 if (hashmap_isempty(link->bound_by_links))
828 return 0;
829
852a3916 830 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR
831 r = link_handle_bound_to_list(l);
832 if (r < 0)
833 return r;
834 }
835
836 return 0;
837}
838
839static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
840 int r;
841
842 assert(link);
843 assert(carrier);
844
845 if (link == carrier)
846 return 0;
847
848 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
849 return 0;
850
190b3b5c 851 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR
852 if (r < 0)
853 return r;
854
9092113d
YW
855 link_dirty(link);
856
0d4ad91d
AR
857 return 0;
858}
859
860static int link_new_bound_by_list(Link *link) {
861 Manager *m;
862 Link *carrier;
0d4ad91d 863 int r;
0d4ad91d
AR
864
865 assert(link);
866 assert(link->manager);
867
868 m = link->manager;
869
6eab614d 870 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR
871 if (!carrier->network)
872 continue;
873
874 if (strv_isempty(carrier->network->bind_carrier))
875 continue;
876
191a3f16 877 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR
878 r = link_put_carrier(link, carrier, &link->bound_by_links);
879 if (r < 0)
880 return r;
0d4ad91d
AR
881 }
882 }
883
90e74a66 884 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR
885 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
886 if (r < 0)
887 return r;
0d4ad91d
AR
888 }
889
890 return 0;
891}
892
893static int link_new_bound_to_list(Link *link) {
894 Manager *m;
895 Link *carrier;
0d4ad91d 896 int r;
0d4ad91d
AR
897
898 assert(link);
899 assert(link->manager);
900
901 if (!link->network)
902 return 0;
903
904 if (strv_isempty(link->network->bind_carrier))
905 return 0;
906
907 m = link->manager;
908
6eab614d 909 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 910 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR
911 r = link_put_carrier(link, carrier, &link->bound_to_links);
912 if (r < 0)
913 return r;
0d4ad91d
AR
914 }
915 }
916
852a3916 917 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR
918 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
919 if (r < 0)
920 return r;
0d4ad91d
AR
921 }
922
923 return 0;
924}
925
0d4ad91d 926static void link_free_bound_to_list(Link *link) {
9092113d 927 bool updated = false;
0d4ad91d 928 Link *bound_to;
0d4ad91d 929
9092113d
YW
930 assert(link);
931
932 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
933 updated = true;
0d4ad91d
AR
934
935 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 936 link_dirty(bound_to);
0d4ad91d
AR
937 }
938
9092113d
YW
939 if (updated)
940 link_dirty(link);
0d4ad91d
AR
941}
942
943static void link_free_bound_by_list(Link *link) {
9092113d 944 bool updated = false;
0d4ad91d 945 Link *bound_by;
0d4ad91d 946
9092113d
YW
947 assert(link);
948
949 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
950 updated = true;
0d4ad91d
AR
951
952 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 953 link_dirty(bound_by);
0d4ad91d
AR
954 link_handle_bound_to_list(bound_by);
955 }
956 }
957
9092113d
YW
958 if (updated)
959 link_dirty(link);
0d4ad91d
AR
960}
961
81357285 962static int link_append_to_master(Link *link) {
5f707e12
YW
963 Link *master;
964 int r;
965
966 assert(link);
5f707e12 967
81357285
YW
968 /* - The link may have no master.
969 * - RTM_NEWLINK message about master interface may not be received yet. */
970 if (link_get_master(link, &master) < 0)
971 return 0;
5f707e12 972
de7fef4b 973 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 974 if (r <= 0)
5f707e12
YW
975 return r;
976
977 link_ref(link);
978 return 0;
979}
980
81357285 981static void link_drop_from_master(Link *link) {
5f707e12
YW
982 Link *master;
983
984 assert(link);
985
81357285 986 if (!link->manager)
5f707e12
YW
987 return;
988
81357285 989 if (link_get_master(link, &master) < 0)
5f707e12
YW
990 return;
991
992 link_unref(set_remove(master->slaves, link));
993}
994
4303e980 995static int link_drop_requests(Link *link) {
56001f02 996 Request *req;
4303e980 997 int ret = 0;
56001f02
YW
998
999 assert(link);
1000 assert(link->manager);
1001
4303e980
YW
1002 ORDERED_SET_FOREACH(req, link->manager->request_queue) {
1003 if (req->link != link)
1004 continue;
1005
1006 /* If the request is already called, but its reply is not received, then we need to
1007 * drop the configuration (e.g. address) here. Note, if the configuration is known,
1008 * it will be handled later by link_drop_foreign_addresses() or so. */
1009 if (req->waiting_reply && link->state != LINK_STATE_LINGER)
1010 switch (req->type) {
1011 case REQUEST_TYPE_ADDRESS: {
1012 Address *address = ASSERT_PTR(req->userdata);
1013
1014 if (address_get(link, address, NULL) < 0)
1015 RET_GATHER(ret, address_remove(address, link));
1016 break;
1017 }
c902fa08
YW
1018 case REQUEST_TYPE_NEIGHBOR: {
1019 Neighbor *neighbor = ASSERT_PTR(req->userdata);
1020
1021 if (neighbor_get(link, neighbor, NULL) < 0)
1022 RET_GATHER(ret, neighbor_remove(neighbor, link));
1023 break;
1024 }
9a988d16
YW
1025 case REQUEST_TYPE_NEXTHOP: {
1026 NextHop *nexthop = ASSERT_PTR(req->userdata);
1027
1028 if (nexthop_get_by_id(link->manager, nexthop->id, NULL) < 0)
1029 RET_GATHER(ret, nexthop_remove(nexthop, link->manager));
1030 break;
1031 }
97979ece
YW
1032 case REQUEST_TYPE_ROUTE: {
1033 Route *route = ASSERT_PTR(req->userdata);
1034
1035 if (route_get(link->manager, route, NULL) < 0)
1036 RET_GATHER(ret, route_remove(route, link->manager));
1037 break;
1038 }
4303e980
YW
1039 default:
1040 ;
1041 }
1042
b9b5096e 1043 request_detach(req);
4303e980
YW
1044 }
1045
1046 return ret;
56001f02
YW
1047}
1048
cc2d7efc 1049static Link *link_drop(Link *link) {
63130eb3 1050 if (!link)
cc2d7efc 1051 return NULL;
0d4ad91d 1052
63130eb3
YW
1053 assert(link->manager);
1054
0d4ad91d
AR
1055 link_set_state(link, LINK_STATE_LINGER);
1056
63130eb3
YW
1057 /* Drop all references from other links and manager. Note that async netlink calls may have
1058 * references to the link, and they will be dropped when we receive replies. */
1059
4303e980 1060 (void) link_drop_requests(link);
56001f02 1061
bb193d2d
YW
1062 link_free_bound_to_list(link);
1063 link_free_bound_by_list(link);
0d4ad91d 1064
b0ff6dea
YW
1065 link_clear_sr_iov_ifindices(link);
1066
81357285 1067 link_drop_from_master(link);
5f707e12 1068
4c78dc17
YW
1069 if (link->state_file)
1070 (void) unlink(link->state_file);
1071
63130eb3
YW
1072 link_clean(link);
1073
0b54c870
YW
1074 STRV_FOREACH(n, link->alternative_names)
1075 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW
1076 hashmap_remove(link->manager->links_by_name, link->ifname);
1077
fe321d45 1078 /* bonding master and its slaves have the same hardware address. */
e74f1d07 1079 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 1080
63130eb3 1081 /* The following must be called at last. */
6eab614d 1082 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1083 return link_unref(link);
0d4ad91d
AR
1084}
1085
5e5b137a 1086static int link_drop_foreign_config(Link *link) {
1339b950 1087 int r;
0b81225e
YW
1088
1089 assert(link);
1090 assert(link->manager);
5e5b137a 1091
5e3bb5da
YW
1092 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
1093 * to remove loopback address or addresses used for root NFS. */
1094
1095 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
1096 return 0;
1097 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
1098 return 0;
1099 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
1100 return 0;
1101
e36d601c 1102 r = link_drop_foreign_routes(link);
5e5b137a 1103
1339b950
ZJS
1104 RET_GATHER(r, link_drop_foreign_nexthops(link));
1105 RET_GATHER(r, link_drop_foreign_addresses(link));
1106 RET_GATHER(r, link_drop_foreign_neighbors(link));
1107 RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager));
0b81225e
YW
1108
1109 return r;
5e5b137a
TG
1110}
1111
a0e99a37 1112static int link_drop_managed_config(Link *link) {
1339b950 1113 int r;
0b81225e
YW
1114
1115 assert(link);
1116 assert(link->manager);
3104883d 1117
e09b7588
YW
1118 r = link_drop_static_routes(link);
1119 RET_GATHER(r, link_drop_static_nexthops(link));
1120 RET_GATHER(r, link_drop_static_addresses(link));
1121 RET_GATHER(r, link_drop_static_neighbors(link));
1122 RET_GATHER(r, link_drop_static_routing_policy_rules(link));
3104883d 1123
0b81225e 1124 return r;
3104883d
SS
1125}
1126
b4564f4e
YW
1127static void link_foreignize_config(Link *link) {
1128 assert(link);
1129 assert(link->manager);
1130
1131 link_foreignize_routes(link);
1132 link_foreignize_nexthops(link);
1133 link_foreignize_addresses(link);
1134 link_foreignize_neighbors(link);
1135 link_foreignize_routing_policy_rules(link);
1136}
1137
c3b94251 1138static int link_configure(Link *link) {
4ecdcb07
YW
1139 int r;
1140
ef1ba606 1141 assert(link);
b22d8a00 1142 assert(link->network);
bd08ce56 1143 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1144
1187fc33
YW
1145 link_set_state(link, LINK_STATE_CONFIGURING);
1146
3cf58ef3
YW
1147 r = link_new_bound_to_list(link);
1148 if (r < 0)
1149 return r;
1150
1dec9d81 1151 r = link_request_traffic_control(link);
4ecdcb07
YW
1152 if (r < 0)
1153 return r;
1154
941f8e13
YW
1155 r = link_configure_mtu(link);
1156 if (r < 0)
1157 return r;
1158
7558f9e7
YW
1159 if (link->iftype == ARPHRD_CAN) {
1160 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1161 r = link_request_to_set_can(link);
1162 if (r < 0)
1163 return r;
1164
1165 return link_request_to_activate(link);
1166 }
1167
cb8453cc 1168 r = link_request_sr_iov_vfs(link);
518cd6b5
SS
1169 if (r < 0)
1170 return r;
1171
5e0534f1 1172 r = link_set_sysctl(link);
b69c3180
SS
1173 if (r < 0)
1174 return r;
8749cbcd 1175
d05c332c 1176 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS
1177 if (r < 0)
1178 return r;
1179
72e65e6f
YW
1180 r = link_request_to_set_ipoib(link);
1181 if (r < 0)
1182 return r;
1183
1187fc33 1184 r = link_request_to_set_flags(link);
e16e4b3b
DS
1185 if (r < 0)
1186 return r;
1187
1187fc33 1188 r = link_request_to_set_group(link);
99d2baa2
SS
1189 if (r < 0)
1190 return r;
1191
1187fc33
YW
1192 r = link_request_to_set_addrgen_mode(link);
1193 if (r < 0)
1194 return r;
1195
1196 r = link_request_to_set_master(link);
1197 if (r < 0)
1198 return r;
1199
1200 r = link_request_stacked_netdevs(link);
1201 if (r < 0)
1202 return r;
1203
1204 r = link_request_to_set_bond(link);
1205 if (r < 0)
1206 return r;
1207
1208 r = link_request_to_set_bridge(link);
1209 if (r < 0)
1210 return r;
1211
1212 r = link_request_to_set_bridge_vlan(link);
1213 if (r < 0)
1214 return r;
1215
1216 r = link_request_to_activate(link);
89fe6535
SS
1217 if (r < 0)
1218 return r;
1219
2ffd6d73
YW
1220 r = ipv4ll_configure(link);
1221 if (r < 0)
1222 return r;
64b21ece 1223
ccffa166 1224 r = link_request_dhcp4_client(link);
2ffd6d73
YW
1225 if (r < 0)
1226 return r;
eb34d4af 1227
ccffa166 1228 r = link_request_dhcp6_client(link);
2ffd6d73
YW
1229 if (r < 0)
1230 return r;
f5a8c43f 1231
ba4c7184 1232 r = link_request_ndisc(link);
2ffd6d73
YW
1233 if (r < 0)
1234 return r;
4138fb2c 1235
1d28a3cf
YW
1236 r = link_request_dhcp_server(link);
1237 if (r < 0)
1238 return r;
1239
a254fab2 1240 r = link_request_radv(link);
086b8853
YW
1241 if (r < 0)
1242 return r;
7465dd22 1243
2ffd6d73
YW
1244 r = link_lldp_rx_configure(link);
1245 if (r < 0)
1246 return r;
ce43e484 1247
c01b9b87
YW
1248 r = link_lldp_tx_configure(link);
1249 if (r < 0)
1250 return r;
1251
5e3bb5da
YW
1252 r = link_drop_foreign_config(link);
1253 if (r < 0)
1254 return r;
4c649652 1255
1187fc33
YW
1256 r = link_request_static_configs(link);
1257 if (r < 0)
1258 return r;
1259
1260 if (!link_has_carrier(link))
1261 return 0;
1262
1263 return link_acquire_dynamic_conf(link);
505f8da7
TG
1264}
1265
170e88c8
YW
1266static int link_get_network(Link *link, Network **ret) {
1267 Network *network;
1a3caa49 1268 int r;
170e88c8
YW
1269
1270 assert(link);
1271 assert(link->manager);
1272 assert(ret);
1273
1274 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1275 bool warn = false;
1276
1a3caa49 1277 r = net_match_config(
170e88c8 1278 &network->match,
8de56fb3 1279 link->dev,
52135071
YW
1280 &link->hw_addr,
1281 &link->permanent_hw_addr,
170e88c8
YW
1282 link->driver,
1283 link->iftype,
65022cd7 1284 link->kind,
170e88c8
YW
1285 link->ifname,
1286 link->alternative_names,
1287 link->wlan_iftype,
1288 link->ssid,
1a3caa49
YW
1289 &link->bssid);
1290 if (r < 0)
1291 return r;
1292 if (r == 0)
170e88c8
YW
1293 continue;
1294
8de56fb3 1295 if (network->match.ifname && link->dev) {
170e88c8
YW
1296 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1297 const char *attr;
1298
8de56fb3 1299 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW
1300 (void) safe_atou8(attr, &name_assign_type);
1301
1302 warn = name_assign_type == NET_NAME_ENUM;
1303 }
1304
1305 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1306 "found matching network '%s'%s.",
1307 network->filename,
1308 warn ? ", based on potentially unpredictable interface name" : "");
1309
1310 if (network->unmanaged)
1311 return -ENOENT;
1312
1313 *ret = network;
1314 return 0;
1315 }
1316
1317 return -ENOENT;
1318}
1319
8a4ad01a 1320int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1321 Network *network = NULL;
9aa2585e 1322 NetDev *netdev = NULL;
ad932b15
YW
1323 int r;
1324
5a1860f7 1325 assert(link);
572b21d9 1326
4faca0a3 1327 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW
1328 return 0;
1329
9aa2585e
YW
1330 r = netdev_get(link->manager, link->ifname, &netdev);
1331 if (r < 0 && r != -ENOENT)
1332 return r;
1333
170e88c8 1334 r = link_get_network(link, &network);
cb71e9c6 1335 if (r < 0 && r != -ENOENT)
ad932b15
YW
1336 return r;
1337
fb961119
YW
1338 if (link->state != LINK_STATE_UNMANAGED && !network)
1339 /* If link is in initialized state, then link->network is also NULL. */
1340 force = true;
1341
99b8517c 1342 if (link->network == network && !force)
ad932b15
YW
1343 return 0;
1344
fb961119 1345 if (network) {
b993e7e7
YW
1346 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1347
fb961119 1348 if (link->state == LINK_STATE_INITIALIZED)
b993e7e7
YW
1349 log_link_info(link, "Configuring with %s%s%s%s.",
1350 network->filename,
1351 isempty(joined) ? "" : " (dropins: ",
1352 joined,
1353 isempty(joined) ? "" : ")");
fb961119 1354 else
b993e7e7
YW
1355 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1356 network->filename,
1357 isempty(joined) ? "" : " (dropins: ",
1358 joined,
1359 isempty(joined) ? "" : ")");
fb961119
YW
1360 } else
1361 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1362 "Unmanaging interface.");
ad932b15
YW
1363
1364 /* Dropping old .network file */
2a99eed0 1365 r = link_stop_engines(link, false);
572b21d9 1366 if (r < 0)
ad932b15 1367 return r;
ad932b15 1368
4303e980
YW
1369 r = link_drop_requests(link);
1370 if (r < 0)
1371 return r;
19d9a5ad 1372
81db4f3d 1373 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW
1374 /* When a new/updated .network file is assigned, first make all configs (addresses,
1375 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW
1376 * link_drop_foreign_config() in link_configure().
1377 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1378 * here we need to drop the configs such as addresses, routes, and so on configured by
1379 * the previously assigned .network file. */
b4564f4e
YW
1380 link_foreignize_config(link);
1381 else {
a0e99a37
YW
1382 /* Remove all managed configs. Note, foreign configs are removed in later by
1383 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1384 r = link_drop_managed_config(link);
b4564f4e
YW
1385 if (r < 0)
1386 return r;
1387 }
ad932b15 1388
3cf58ef3
YW
1389 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1390 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1391 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1392 * map here, as it depends on .network files assigned to other links. */
1393 link_free_bound_to_list(link);
1394
ad932b15
YW
1395 link_free_engines(link);
1396 link->network = network_unref(link->network);
1397
9aa2585e
YW
1398 netdev_unref(link->netdev);
1399 link->netdev = netdev_ref(netdev);
1400
cb71e9c6
YW
1401 if (!network) {
1402 link_set_state(link, LINK_STATE_UNMANAGED);
1403 return 0;
1404 }
1405
ad932b15 1406 /* Then, apply new .network file */
9092113d 1407 link->network = network_ref(network);
b156a95d 1408 link_update_operstate(link, true);
9092113d 1409 link_dirty(link);
ad932b15 1410
ad932b15 1411 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1412 link->activated = false;
ad932b15 1413
ad932b15
YW
1414 r = link_configure(link);
1415 if (r < 0)
1416 return r;
1417
0e397560 1418 return 1;
ad932b15
YW
1419}
1420
96f5f9ef 1421static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW
1422 int r;
1423
d09a179e
YW
1424 assert(link);
1425
5a1860f7
YW
1426 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1427 if (r <= 0)
1428 return r;
1429
7f80fa12 1430 r = link_reconfigure_impl(link, force);
d09a179e 1431 if (r < 0) {
572b21d9 1432 link_enter_failed(link);
d09a179e
YW
1433 return 0;
1434 }
572b21d9 1435
d09a179e 1436 return r;
572b21d9
YW
1437}
1438
5a1860f7 1439static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1440 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1441}
572b21d9 1442
5a1860f7 1443static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1444 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW
1445}
1446
a39a9ac8 1447int link_reconfigure(Link *link, bool force) {
d09a179e
YW
1448 int r;
1449
1450 assert(link);
d09a179e 1451
8bceafa7 1452 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS
1453 * the function from being called multiple times simultaneously, refuse to reconfigure the
1454 * interface in these cases. */
8bceafa7 1455 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1456 return 0; /* 0 means no-op. */
2c0d7ed3 1457
a39a9ac8 1458 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW
1459 if (r < 0)
1460 return r;
1461
8bceafa7 1462 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW
1463}
1464
1e869a5d
YW
1465typedef struct ReconfigureData {
1466 Link *link;
1467 Manager *manager;
1468 sd_bus_message *message;
1469} ReconfigureData;
1470
1471static void reconfigure_data_destroy_callback(ReconfigureData *data) {
1472 int r;
1473
1474 assert(data);
1475 assert(data->link);
1476 assert(data->manager);
1477 assert(data->manager->reloading > 0);
1478 assert(data->message);
1479
1480 link_unref(data->link);
1481
1482 data->manager->reloading--;
1483 if (data->manager->reloading <= 0) {
1484 r = sd_bus_reply_method_return(data->message, NULL);
1485 if (r < 0)
1486 log_warning_errno(r, "Failed to send reply for 'Reload' DBus method, ignoring: %m");
1487 }
1488
1489 sd_bus_message_unref(data->message);
1490 free(data);
1491}
1492
1493static int reconfigure_handler_on_bus_method_reload(sd_netlink *rtnl, sd_netlink_message *m, ReconfigureData *data) {
1494 assert(data);
1495 assert(data->link);
1496 return link_reconfigure_handler_internal(rtnl, m, data->link, /* force = */ false);
1497}
1498
1499int link_reconfigure_on_bus_method_reload(Link *link, sd_bus_message *message) {
1500 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1501 _cleanup_free_ ReconfigureData *data = NULL;
1502 int r;
1503
1504 assert(link);
1505 assert(link->manager);
1506 assert(link->manager->rtnl);
1507 assert(message);
1508
1509 /* See comments in link_reconfigure() above. */
1510 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
1511 return 0;
1512
1513 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
1514 if (r < 0)
1515 return r;
1516
1517 data = new(ReconfigureData, 1);
1518 if (!data)
1519 return -ENOMEM;
1520
1521 r = netlink_call_async(link->manager->rtnl, NULL, req,
1522 reconfigure_handler_on_bus_method_reload,
1523 reconfigure_data_destroy_callback, data);
1524 if (r < 0)
1525 return r;
1526
1527 *data = (ReconfigureData) {
1528 .link = link_ref(link),
1529 .manager = link->manager,
1530 .message = sd_bus_message_ref(message),
1531 };
1532
1533 link->manager->reloading++;
1534
1535 TAKE_PTR(data);
1536 return 0;
1537}
1538
e6bf7774 1539static int link_initialized_and_synced(Link *link) {
505f8da7
TG
1540 int r;
1541
1542 assert(link);
505f8da7
TG
1543 assert(link->manager);
1544
faa2e64f
YW
1545 if (link->manager->test_mode) {
1546 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1547 link_set_state(link, LINK_STATE_UNMANAGED);
1548 return 0;
1549 }
1550
40695457
YW
1551 if (link->state == LINK_STATE_PENDING) {
1552 log_link_debug(link, "Link state is up-to-date");
1553 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1554
40695457
YW
1555 r = link_new_bound_by_list(link);
1556 if (r < 0)
1557 return r;
0d4ad91d 1558
40695457
YW
1559 r = link_handle_bound_by_list(link);
1560 if (r < 0)
1561 return r;
1562 }
0d4ad91d 1563
fb961119 1564 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG
1565}
1566
302a796f 1567static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW
1568 int r;
1569
5a1860f7
YW
1570 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1571 if (r <= 0)
0b54c870 1572 return r;
572b21d9 1573
4ff296b0
YW
1574 r = link_initialized_and_synced(link);
1575 if (r < 0)
1576 link_enter_failed(link);
5a1860f7
YW
1577
1578 return 0;
e6bf7774
YW
1579}
1580
3be9d62a 1581static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW
1582 int r;
1583
4f561e8e 1584 assert(link);
4f561e8e
TG
1585 assert(device);
1586
160203e9
YW
1587 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1588 * or sysattrs) may be outdated. */
8de56fb3 1589 device_unref_and_replace(link->dev, device);
4f561e8e 1590
3b1dbdf0
YW
1591 if (link->dhcp_client) {
1592 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1593 if (r < 0)
1594 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1595 }
1596
1597 if (link->dhcp6_client) {
1598 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1599 if (r < 0)
1600 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1601 }
1602
b0ff6dea
YW
1603 r = link_set_sr_iov_ifindices(link);
1604 if (r < 0)
1605 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1606
40695457
YW
1607 if (link->state != LINK_STATE_PENDING)
1608 return link_reconfigure(link, /* force = */ false);
679b3605 1609
79008bdd 1610 log_link_debug(link, "udev initialized link");
4f561e8e 1611
3c9b8860
TG
1612 /* udev has initialized the link, but we don't know if we have yet
1613 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1614 * when it returns we know that the pending NEWLINKs have already been
1615 * processed and that we are up-to-date */
4f561e8e 1616
5a1860f7 1617 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW
1618}
1619
0d411b7f 1620static int link_check_initialized(Link *link) {
51517f9e 1621 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1622 int r;
505f8da7 1623
0d411b7f 1624 assert(link);
505f8da7 1625
82f52245 1626 if (!udev_available())
0d411b7f 1627 return link_initialized_and_synced(link);
852a3916
YW
1628
1629 /* udev should be around */
0ac655a6 1630 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW
1631 if (r < 0) {
1632 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1633 return 0;
1634 }
1635
1636 r = sd_device_get_is_initialized(device);
0d411b7f
YW
1637 if (r < 0)
1638 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW
1639 if (r == 0) {
1640 /* not yet ready */
1641 log_link_debug(link, "link pending udev initialization...");
1642 return 0;
1643 }
1644
1645 r = device_is_renaming(device);
0d411b7f
YW
1646 if (r < 0)
1647 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW
1648 if (r > 0) {
1649 log_link_debug(link, "Interface is being renamed, pending initialization.");
1650 return 0;
4f561e8e 1651 }
505f8da7 1652
13176bfe
YW
1653 r = device_is_processing(device);
1654 if (r < 0)
1655 return log_link_warning_errno(link, r, "Failed to determine whether the device is being processed: %m");
1656 if (r > 0) {
1657 log_link_debug(link, "Interface is being processed by udevd, pending initialization.");
1658 return 0;
1659 }
1660
0d411b7f 1661 return link_initialized(link, device);
a748b692
TG
1662}
1663
1fd3ac1e 1664int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1665 int r, ifindex;
ba87a61d 1666 const char *s;
1fd3ac1e 1667 Link *link;
3be9d62a
YW
1668
1669 assert(m);
1670 assert(device);
1671
3be9d62a 1672 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW
1673 if (r < 0)
1674 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1675
75255a8d
YW
1676 r = link_get_by_index(m, ifindex, &link);
1677 if (r < 0) {
1678 /* This error is not critical, as the corresponding rtnl message may be received later. */
1679 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1680 return 0;
1681 }
1682
1683 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1684 * object here. It will be removed only when rtnetlink says so. */
1685 if (action == SD_DEVICE_REMOVE) {
1686 link->dev = sd_device_unref(link->dev);
1687 return 0;
1688 }
1689
3be9d62a 1690 r = device_is_renaming(device);
1fd3ac1e
YW
1691 if (r < 0)
1692 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1693 if (r > 0) {
1fd3ac1e 1694 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW
1695 /* TODO:
1696 * What happens when a device is initialized, then soon renamed after that? When we detect
1697 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW
1698 return 0;
1699 }
1700
ba87a61d
YW
1701 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1702 if (r < 0 && r != -ENOENT)
1703 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1704 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1705 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1706 link_set_state(link, LINK_STATE_UNMANAGED);
1707 return 0;
1708 }
1709
4b9a8c2b
YW
1710 r = link_initialized(link, device);
1711 if (r < 0)
1712 link_enter_failed(link);
3be9d62a
YW
1713
1714 return 0;
1715}
1716
9c0a72f9 1717static int link_carrier_gained(Link *link) {
6706ce2f 1718 bool force_reconfigure;
9c0a72f9
TG
1719 int r;
1720
1721 assert(link);
1722
6706ce2f
YW
1723 r = event_source_disable(link->carrier_lost_timer);
1724 if (r < 0)
1725 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1726
d9910948
YW
1727 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1728 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1729 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1730 * restarted, and the correct network information will be gained.
1731 *
1732 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1733 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1734 * already assigned to the interface (in that case, the .network file does not have the SSID=
1735 * setting in the [Match] section), and the interface is already being configured. Of course,
1736 * there may exist another .network file with higher priority and a matching SSID= setting. But
1737 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1738 *
6706ce2f 1739 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW
1740 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1741 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW
1742 link->previous_ssid = mfree(link->previous_ssid);
1743
986b2514
1744 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1745 * profile wants to match on it with SSID= in its [Match] section.
1746 */
1747 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1748 r = link_get_wlan_interface(link);
1749 if (r < 0)
1750 return r;
1751 }
1752
081466bd
YW
1753 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1754 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1755 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1756 r = link_reconfigure_impl(link, force_reconfigure);
1757 if (r != 0)
1758 return r;
b7ac1284 1759
aa9117c0
YW
1760 r = link_handle_bound_by_list(link);
1761 if (r < 0)
1762 return r;
1763
600b7898
YW
1764 if (link->iftype == ARPHRD_CAN)
1765 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1766 return 0;
600b7898 1767
b9ea3d2e 1768 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1769 r = link_acquire_dynamic_conf(link);
f0269653 1770 if (r < 0)
9c0a72f9 1771 return r;
6fc25497 1772
97108953 1773 r = link_request_static_configs(link);
6fc25497
SS
1774 if (r < 0)
1775 return r;
9c0a72f9
TG
1776 }
1777
aa9117c0 1778 return 0;
9c0a72f9
TG
1779}
1780
6706ce2f
YW
1781static int link_carrier_lost_impl(Link *link) {
1782 int r, ret = 0;
1783
1784 assert(link);
1785
1786 link->previous_ssid = mfree(link->previous_ssid);
1787
1788 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1789 return 0;
1790
1791 if (!link->network)
1792 return 0;
1793
1794 r = link_stop_engines(link, false);
1795 if (r < 0)
1796 ret = r;
1797
a0e99a37 1798 r = link_drop_managed_config(link);
6706ce2f
YW
1799 if (r < 0 && ret >= 0)
1800 ret = r;
1801
1802 return ret;
1803}
1804
1805static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1806 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW
1807 int r;
1808
6706ce2f
YW
1809 r = link_carrier_lost_impl(link);
1810 if (r < 0) {
1811 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1812 link_enter_failed(link);
1813 }
1814
1815 return 0;
1816}
1817
9c0a72f9 1818static int link_carrier_lost(Link *link) {
b7326069
YW
1819 uint16_t dhcp_mtu;
1820 usec_t usec;
9c0a72f9
TG
1821 int r;
1822
1823 assert(link);
1824
aa9117c0
YW
1825 r = link_handle_bound_by_list(link);
1826 if (r < 0)
1827 return r;
93b4dab5 1828
600b7898
YW
1829 if (link->iftype == ARPHRD_CAN)
1830 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW
1831 return 0;
1832
f1c22cf4
YW
1833 if (!link->network)
1834 return 0;
1835
b7326069
YW
1836 if (link->network->ignore_carrier_loss_set)
1837 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1838 usec = link->network->ignore_carrier_loss_usec;
1839
1840 else if (link->network->bond && link->wlan_iftype > 0)
1841 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1842 * carrier to be lost. See #19832. */
1843 usec = 3 * USEC_PER_SEC;
1844
1845 else if (link->network->dhcp_use_mtu &&
1846 link->dhcp_lease &&
1847 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1848 dhcp_mtu != link->original_mtu)
1849 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1850 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1851 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1852 usec = 5 * USEC_PER_SEC;
1853
1854 else
27438545 1855 /* Otherwise, use the implied default value. */
b7326069
YW
1856 usec = link->network->ignore_carrier_loss_usec;
1857
1858 if (usec == USEC_INFINITY)
aa9117c0 1859 return 0;
600b7898 1860
b7326069 1861 if (usec == 0)
6706ce2f
YW
1862 return link_carrier_lost_impl(link);
1863
1864 return event_reset_time_relative(link->manager->event,
1865 &link->carrier_lost_timer,
ba4e0427 1866 CLOCK_BOOTTIME,
b7326069 1867 usec,
6706ce2f
YW
1868 0,
1869 link_carrier_lost_handler,
1870 link,
1871 0,
1872 "link-carrier-loss",
1873 true);
0c9ee5d5
YW
1874}
1875
0c9ee5d5
YW
1876static int link_admin_state_up(Link *link) {
1877 int r;
1878
1879 assert(link);
1880
1881 /* This is called every time an interface admin state changes to up;
1882 * specifically, when IFF_UP flag changes from unset to set. */
1883
1884 if (!link->network)
1885 return 0;
1886
899b0e5e 1887 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1888 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1889 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW
1890 }
1891
1892 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1893 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1894 r = link_set_ipv6_mtu(link);
1895 if (r < 0)
1896 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1897
1898 return 0;
1899}
1900
1901static int link_admin_state_down(Link *link) {
1902 assert(link);
1903
1904 if (!link->network)
1905 return 0;
1906
899b0e5e 1907 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1908 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1909 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW
1910 }
1911
1912 return 0;
1913}
1914
0c9ee5d5
YW
1915static bool link_is_enslaved(Link *link) {
1916 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW
1917 return true;
1918
1f024462 1919 if (link->master_ifindex > 0)
0c9ee5d5
YW
1920 return true;
1921
0c9ee5d5
YW
1922 return false;
1923}
1924
0c9ee5d5
YW
1925void link_update_operstate(Link *link, bool also_update_master) {
1926 LinkOperationalState operstate;
1927 LinkCarrierState carrier_state;
1928 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1929 LinkOnlineState online_state;
1930 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1931 bool changed = false;
0c9ee5d5
YW
1932
1933 assert(link);
1934
1935 if (link->kernel_operstate == IF_OPER_DORMANT)
1936 carrier_state = LINK_CARRIER_STATE_DORMANT;
1937 else if (link_has_carrier(link)) {
1938 if (link_is_enslaved(link))
1939 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1940 else
1941 carrier_state = LINK_CARRIER_STATE_CARRIER;
1942 } else if (link->flags & IFF_UP)
1943 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1944 else
1945 carrier_state = LINK_CARRIER_STATE_OFF;
1946
1947 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1948 Link *slave;
1949
1950 SET_FOREACH(slave, link->slaves) {
1951 link_update_operstate(slave, false);
1952
1953 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1954 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1955 }
1956 }
1957
60415c13 1958 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW
1959
1960 /* Mapping of address and carrier state vs operational state
1961 * carrier state
1962 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1963 * ------------------------------------------------------------------------------
1964 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH
1965 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1966 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW
1967 */
1968
cf4dbd84
HH
1969 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1970 operstate = LINK_OPERSTATE_ROUTABLE;
1971 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1972 operstate = LINK_OPERSTATE_DEGRADED;
1973 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW
1974 operstate = (LinkOperationalState) carrier_state;
1975 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1976 operstate = LINK_OPERSTATE_ROUTABLE;
1977 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1978 operstate = LINK_OPERSTATE_DEGRADED;
1979 else
1980 operstate = LINK_OPERSTATE_ENSLAVED;
1981
2278d9f6
YW
1982 LinkOperationalStateRange req;
1983 link_required_operstate_for_online(link, &req);
1984
0c9ee5d5
YW
1985 /* Only determine online state for managed links with RequiredForOnline=yes */
1986 if (!link->network || !link->network->required_for_online)
1987 online_state = _LINK_ONLINE_STATE_INVALID;
2278d9f6
YW
1988
1989 else if (!operational_state_is_in_range(operstate, &req))
0c9ee5d5 1990 online_state = LINK_ONLINE_STATE_OFFLINE;
2278d9f6 1991
0c9ee5d5 1992 else {
a853cc99 1993 AddressFamily required_family = link_required_family_for_online(link);
0c9ee5d5
YW
1994 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1995 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1996
1997 /* The operational state is within the range required for online.
1998 * If a particular address family is also required, we might revert
1999 * to offline in the blocks below. */
2000 online_state = LINK_ONLINE_STATE_ONLINE;
2001
2278d9f6 2002 if (req.min >= LINK_OPERSTATE_DEGRADED) {
0c9ee5d5
YW
2003 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
2004 online_state = LINK_ONLINE_STATE_OFFLINE;
2005 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
2006 online_state = LINK_ONLINE_STATE_OFFLINE;
2007 }
2008
2278d9f6 2009 if (req.min >= LINK_OPERSTATE_ROUTABLE) {
0c9ee5d5
YW
2010 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2011 online_state = LINK_ONLINE_STATE_OFFLINE;
2012 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2013 online_state = LINK_ONLINE_STATE_OFFLINE;
2014 }
2015 }
2016
2017 if (link->carrier_state != carrier_state) {
2018 link->carrier_state = carrier_state;
2019 changed = true;
2020 if (strv_extend(&p, "CarrierState") < 0)
2021 log_oom();
2022 }
2023
2024 if (link->address_state != address_state) {
2025 link->address_state = address_state;
2026 changed = true;
2027 if (strv_extend(&p, "AddressState") < 0)
2028 log_oom();
2029 }
0d4ad91d 2030
0c9ee5d5
YW
2031 if (link->ipv4_address_state != ipv4_address_state) {
2032 link->ipv4_address_state = ipv4_address_state;
2033 changed = true;
2034 if (strv_extend(&p, "IPv4AddressState") < 0)
2035 log_oom();
2036 }
9c0a72f9 2037
0c9ee5d5
YW
2038 if (link->ipv6_address_state != ipv6_address_state) {
2039 link->ipv6_address_state = ipv6_address_state;
2040 changed = true;
2041 if (strv_extend(&p, "IPv6AddressState") < 0)
2042 log_oom();
2043 }
9c0a72f9 2044
0c9ee5d5
YW
2045 if (link->operstate != operstate) {
2046 link->operstate = operstate;
2047 changed = true;
2048 if (strv_extend(&p, "OperationalState") < 0)
2049 log_oom();
2050 }
9c0a72f9 2051
0c9ee5d5
YW
2052 if (link->online_state != online_state) {
2053 link->online_state = online_state;
2054 changed = true;
2055 if (strv_extend(&p, "OnlineState") < 0)
2056 log_oom();
2057 }
9c0a72f9 2058
0c9ee5d5
YW
2059 if (p)
2060 link_send_changed_strv(link, p);
2061 if (changed)
2062 link_dirty(link);
9c0a72f9 2063
0c9ee5d5
YW
2064 if (also_update_master) {
2065 Link *master;
9c0a72f9 2066
0c9ee5d5
YW
2067 if (link_get_master(link, &master) >= 0)
2068 link_update_operstate(master, true);
2069 }
9c0a72f9
TG
2070}
2071
0c9ee5d5
YW
2072#define FLAG_STRING(string, flag, old, new) \
2073 (((old ^ new) & flag) \
2074 ? ((old & flag) ? (" -" string) : (" +" string)) \
2075 : "")
2076
0d411b7f 2077static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 2078 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW
2079 uint8_t operstate;
2080 unsigned flags;
d236718c
DS
2081 int r;
2082
61135582 2083 assert(link);
0d411b7f 2084 assert(message);
61135582 2085
0d411b7f 2086 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 2087 if (r < 0)
0d411b7f 2088 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 2089
0d411b7f
YW
2090 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
2091 if (r == -ENODATA)
2092 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 2093 operstate = link->kernel_operstate;
0d411b7f
YW
2094 else if (r < 0)
2095 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 2096
0d411b7f 2097 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS
2098 return 0;
2099
0c9ee5d5
YW
2100 if (link->flags != flags) {
2101 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 2102
0c9ee5d5
YW
2103 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",
2104 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
2105 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
2106 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
2107 FLAG_STRING("UP", IFF_UP, link->flags, flags),
2108 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
2109 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
2110 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
2111 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
2112 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
2113 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
2114 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
2115 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
2116 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
2117 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
2118 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
2119 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
2120 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
2121 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
2122 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 2123
0c9ee5d5
YW
2124 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
2125 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
2126 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
2127 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
2128 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
2129 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
2130 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
2131 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 2132
0c9ee5d5
YW
2133 if (unknown_flags_added)
2134 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 2135
0c9ee5d5
YW
2136 if (unknown_flags_removed)
2137 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
2138 }
61135582 2139
0d411b7f
YW
2140 link_was_admin_up = link->flags & IFF_UP;
2141 had_carrier = link_has_carrier(link);
2142
0c9ee5d5
YW
2143 link->flags = flags;
2144 link->kernel_operstate = operstate;
36161cba 2145
0c9ee5d5 2146 link_update_operstate(link, true);
61135582 2147
0d411b7f
YW
2148 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2149 log_link_info(link, "Link UP");
22936833 2150
0d411b7f
YW
2151 r = link_admin_state_up(link);
2152 if (r < 0)
2153 return r;
2154 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
2155 log_link_info(link, "Link DOWN");
0d4ad91d 2156
0d411b7f 2157 r = link_admin_state_down(link);
0d4ad91d
AR
2158 if (r < 0)
2159 return r;
7619683b
TG
2160 }
2161
0d411b7f
YW
2162 if (!had_carrier && link_has_carrier(link)) {
2163 log_link_info(link, "Gained carrier");
0d4ad91d 2164
0d411b7f 2165 r = link_carrier_gained(link);
30de2b89
YW
2166 if (r < 0)
2167 return r;
0d411b7f
YW
2168 } else if (had_carrier && !link_has_carrier(link)) {
2169 log_link_info(link, "Lost carrier");
2170
2171 r = link_carrier_lost(link);
0b54c870
YW
2172 if (r < 0)
2173 return r;
b8941f74
TG
2174 }
2175
0d411b7f
YW
2176 return 0;
2177}
afe7fd56 2178
0d411b7f
YW
2179static int link_update_master(Link *link, sd_netlink_message *message) {
2180 int master_ifindex, r;
7465dd22 2181
0d411b7f
YW
2182 assert(link);
2183 assert(message);
69629de9 2184
0d411b7f
YW
2185 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2186 if (r == -ENODATA)
2187 return 0;
2188 if (r < 0)
2189 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2190
571bf1aa
YW
2191 if (master_ifindex == link->ifindex)
2192 master_ifindex = 0;
2193
74e95e3a
YW
2194 if (master_ifindex != link->master_ifindex) {
2195 if (link->master_ifindex == 0)
2196 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
2197 else if (master_ifindex == 0)
2198 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
2199 else
2200 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2201 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2202
74e95e3a
YW
2203 link_drop_from_master(link);
2204 link->master_ifindex = master_ifindex;
2205 }
413708d1 2206
0d411b7f
YW
2207 r = link_append_to_master(link);
2208 if (r < 0)
2209 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2210
0d411b7f
YW
2211 return 0;
2212}
807667f7 2213
e1658632
YW
2214static int link_update_driver(Link *link, sd_netlink_message *message) {
2215 int r;
2216
2217 assert(link);
2218 assert(link->manager);
2219 assert(message);
2220
2221 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2222 if (link->ethtool_driver_read)
e1658632
YW
2223 return 0;
2224
2225 /* When udevd is running, read the driver after the interface is initialized by udevd.
2226 * Otherwise, ethtool may not work correctly. See issue #22538.
2227 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2228 if (udev_available() && !link->dev)
e1658632
YW
2229 return 0;
2230
6625c39e
YW
2231 link->ethtool_driver_read = true;
2232
e1658632
YW
2233 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2234 if (r < 0) {
2235 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2236 return 0;
2237 }
2238
2239 log_link_debug(link, "Found driver: %s", strna(link->driver));
2240
2241 if (streq_ptr(link->driver, "dsa")) {
2242 uint32_t dsa_master_ifindex = 0;
2243
2244 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2245 if (r < 0 && r != -ENODATA)
2246 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2247
2248 if (dsa_master_ifindex > INT_MAX) {
2249 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2250 dsa_master_ifindex);
2251 dsa_master_ifindex = 0;
2252 }
2253
2254 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2255 }
2256
40695457 2257 return 1; /* needs reconfigure */
e1658632
YW
2258}
2259
6625c39e 2260static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW
2261 int r;
2262
2263 assert(link);
2264 assert(link->manager);
2265 assert(message);
2266
6625c39e 2267 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW
2268 return 0;
2269
2270 /* When udevd is running, read the permanent hardware address after the interface is
2271 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2272 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW
2273 if (udev_available() && !link->dev)
2274 return 0;
2275
2276 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2277 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2278 if (r == -ENODATA)
2279 return 0;
2280 if (r < 0)
2281 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2282
2283 link->ethtool_permanent_hw_addr_read = true;
2284
2285 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2286 if (r < 0)
2287 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2288
2289 return 0;
2290}
2291
2292static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2293 int r;
2294
2295 assert(link);
2296 assert(link->manager);
2297 assert(message);
2298
2299 if (link->permanent_hw_addr.length > 0)
e1658632
YW
2300 return 0;
2301
2302 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2303 if (r < 0) {
2304 if (r != -ENODATA)
2305 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2306
6625c39e
YW
2307 /* Fallback to ethtool for older kernels. */
2308 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2309 if (r < 0)
2310 return r;
e1658632
YW
2311 }
2312
2313 if (link->permanent_hw_addr.length > 0)
2314 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2315
40695457 2316 return 1; /* needs reconfigure */
e1658632
YW
2317}
2318
0d411b7f 2319static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2320 struct hw_addr_data addr;
0d411b7f 2321 int r;
d93d655c 2322
0d411b7f
YW
2323 assert(link);
2324 assert(message);
dfc58b47 2325
0d411b7f
YW
2326 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2327 if (r < 0 && r != -ENODATA)
2328 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2329
e2bacccd 2330 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW
2331 if (r == -ENODATA)
2332 return 0;
2333 if (r < 0)
fe321d45 2334 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2335
e2bacccd 2336 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2337 return 0;
a61bb41c 2338
de0f1579 2339 if (link->hw_addr.length == 0)
e2bacccd 2340 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2341 else {
e2341b6b
DT
2342 log_link_debug(link, "Hardware address is changed: %s %s %s",
2343 HW_ADDR_TO_STR(&link->hw_addr),
2344 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2345 HW_ADDR_TO_STR(&addr));
0d411b7f 2346
e74f1d07 2347 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW
2348 }
2349
e2bacccd
YW
2350 link->hw_addr = addr;
2351
fe321d45
YW
2352 if (!hw_addr_is_null(&link->hw_addr)) {
2353 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2354 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2355 /* bonding master and its slaves have the same hardware address. */
2356 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2357 if (r < 0)
2358 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2359 }
0d411b7f 2360
0a14f83a 2361 r = ipv4acd_update_mac(link);
76a86ffd
YW
2362 if (r < 0)
2363 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2364
0d411b7f 2365 r = ipv4ll_update_mac(link);
a61bb41c 2366 if (r < 0)
0d411b7f 2367 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2368
0d411b7f
YW
2369 r = dhcp4_update_mac(link);
2370 if (r < 0)
2371 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2372
0d411b7f
YW
2373 r = dhcp6_update_mac(link);
2374 if (r < 0)
2375 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2376
2377 r = radv_update_mac(link);
2378 if (r < 0)
2379 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2380
3be64aa4 2381 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2382 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2383 if (r < 0)
0d411b7f
YW
2384 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2385 }
d236718c 2386
35778343
YW
2387 if (link->lldp_rx) {
2388 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2389 if (r < 0)
c01b9b87
YW
2390 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2391 }
2392
2393 if (link->lldp_tx) {
2394 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2395 if (r < 0)
2396 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS
2397 }
2398
40695457 2399 return 1; /* needs reconfigure */
0d411b7f 2400}
a61bb41c 2401
0d411b7f 2402static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2403 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2404 int r;
a61bb41c 2405
0d411b7f
YW
2406 assert(link);
2407 assert(message);
2408
2409 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2410 if (r == -ENODATA)
2411 return 0;
2412 if (r < 0)
2413 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW
2414 if (mtu == 0)
2415 return 0;
0d411b7f 2416
717ba5fc
YW
2417 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2418 if (r < 0 && r != -ENODATA)
2419 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2420
2421 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2422 if (r < 0 && r != -ENODATA)
2423 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2424
717ba5fc
YW
2425 if (max_mtu == 0)
2426 max_mtu = UINT32_MAX;
2427
2428 link->min_mtu = min_mtu;
2429 link->max_mtu = max_mtu;
2430
0d411b7f
YW
2431 if (link->original_mtu == 0) {
2432 link->original_mtu = mtu;
717ba5fc
YW
2433 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2434 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW
2435 }
2436
717ba5fc
YW
2437 if (link->mtu == mtu)
2438 return 0;
2439
b5d0fd1e 2440 if (link->mtu != 0)
e2341b6b
DT
2441 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2442 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2443 link->min_mtu, link->max_mtu);
0d411b7f
YW
2444
2445 link->mtu = mtu;
2446
2447 if (link->dhcp_client) {
2448 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2449 if (r < 0)
0d411b7f
YW
2450 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2451 }
a61bb41c 2452
0d411b7f
YW
2453 if (link->radv) {
2454 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2455 if (r < 0)
0d411b7f 2456 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG
2457 }
2458
2459 return 0;
dd3efc09 2460}
fe8db0c5 2461
0d411b7f
YW
2462static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2463 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW
2464 int r;
2465
2466 assert(link);
2467 assert(message);
2468
2469 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2470 if (r == -ENODATA)
2368ff81 2471 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW
2472 * interface has no alternative name. */
2473 return 0;
2474 if (r < 0)
0d411b7f
YW
2475 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2476
1b345c1e
YW
2477 if (strv_equal(altnames, link->alternative_names))
2478 return 0;
2479
0d411b7f
YW
2480 STRV_FOREACH(n, link->alternative_names)
2481 hashmap_remove(link->manager->links_by_name, *n);
2482
2483 strv_free_and_replace(link->alternative_names, altnames);
2484
2485 STRV_FOREACH(n, link->alternative_names) {
2486 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2487 if (r < 0)
2488 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2489 }
2490
40695457 2491 return 1; /* needs reconfigure */
0d411b7f
YW
2492}
2493
2494static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2495 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW
2496 const char *ifname;
2497 int r;
2498
2499 assert(link);
2500 assert(message);
2501
2502 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2503 if (r == -ENODATA)
7802194a 2504 /* Hmm?? But ok. */
0d411b7f
YW
2505 return 0;
2506 if (r < 0)
2507 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2508
2509 if (streq(ifname, link->ifname))
2510 return 0;
2511
01afd0f7
YW
2512 r = format_ifname(link->ifindex, ifname_from_index);
2513 if (r < 0)
2514 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW
2515
2516 if (!streq(ifname, ifname_from_index)) {
2517 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2518 "with the name currently configured on the actual interface '%s'. Ignoring.",
2519 ifname, ifname_from_index);
2520 return 0;
2521 }
2522
0d411b7f
YW
2523 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2524
2525 hashmap_remove(link->manager->links_by_name, link->ifname);
2526
2527 r = free_and_strdup(&link->ifname, ifname);
2528 if (r < 0)
2529 return log_oom_debug();
2530
2531 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2532 if (r < 0)
2533 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2534
54d1fdb2
YW
2535 if (link->dhcp_client) {
2536 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2537 if (r < 0)
2538 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2539 }
2540
2541 if (link->dhcp6_client) {
2542 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2543 if (r < 0)
2544 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2545 }
2546
2547 if (link->ndisc) {
2548 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2549 if (r < 0)
2550 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2551 }
2552
2553 if (link->dhcp_server) {
2554 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2555 if (r < 0)
2556 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2557 }
2558
2559 if (link->radv) {
2560 r = sd_radv_set_ifname(link->radv, link->ifname);
2561 if (r < 0)
2562 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2563 }
2564
35778343
YW
2565 if (link->lldp_rx) {
2566 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2567 if (r < 0)
c01b9b87
YW
2568 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2569 }
2570
2571 if (link->lldp_tx) {
2572 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2573 if (r < 0)
2574 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW
2575 }
2576
2577 if (link->ipv4ll) {
2578 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2579 if (r < 0)
2580 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2581 }
2582
86173383
YW
2583 r = ipv4acd_set_ifname(link);
2584 if (r < 0)
2585 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2586
40695457 2587 return 1; /* needs reconfigure */
0d411b7f
YW
2588}
2589
2590static int link_update(Link *link, sd_netlink_message *message) {
40695457 2591 bool needs_reconfigure = false;
0d411b7f
YW
2592 int r;
2593
2594 assert(link);
2595 assert(message);
2596
2597 r = link_update_name(link, message);
2598 if (r < 0)
2599 return r;
40695457 2600 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW
2601
2602 r = link_update_alternative_names(link, message);
2603 if (r < 0)
2604 return r;
40695457 2605 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW
2606
2607 r = link_update_mtu(link, message);
2608 if (r < 0)
2609 return r;
2610
e1658632
YW
2611 r = link_update_driver(link, message);
2612 if (r < 0)
2613 return r;
40695457 2614 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW
2615
2616 r = link_update_permanent_hardware_address(link, message);
2617 if (r < 0)
2618 return r;
40695457 2619 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2620
0d411b7f
YW
2621 r = link_update_hardware_address(link, message);
2622 if (r < 0)
2623 return r;
40695457 2624 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW
2625
2626 r = link_update_master(link, message);
2627 if (r < 0)
2628 return r;
2629
7d0d832d
YW
2630 r = link_update_ipv6ll_addrgen_mode(link, message);
2631 if (r < 0)
2632 return r;
2633
40695457
YW
2634 r = link_update_flags(link, message);
2635 if (r < 0)
2636 return r;
2637
11cee6ef
YW
2638 r = link_update_bridge_vlan(link, message);
2639 if (r < 0)
2640 return r;
2641
40695457 2642 return needs_reconfigure;
0d411b7f
YW
2643}
2644
0c9ee5d5
YW
2645static Link *link_drop_or_unref(Link *link) {
2646 if (!link)
2647 return NULL;
2648 if (!link->manager)
2649 return link_unref(link);
2650 return link_drop(link);
2651}
2652
2653DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2654
2655static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2656 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2657 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW
2658 unsigned short iftype;
2659 int r, ifindex;
0c9ee5d5
YW
2660
2661 assert(manager);
2662 assert(message);
2663 assert(ret);
2664
0c9ee5d5
YW
2665 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2666 if (r < 0)
0d411b7f 2667 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2668 else if (ifindex <= 0)
0d411b7f 2669 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW
2670
2671 r = sd_rtnl_message_link_get_type(message, &iftype);
2672 if (r < 0)
0d411b7f 2673 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW
2674
2675 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2676 if (r < 0)
0d411b7f 2677 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW
2678
2679 /* check for link kind */
2680 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2681 if (r >= 0) {
0d411b7f
YW
2682 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2683 if (r < 0 && r != -ENODATA)
2684 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW
2685 r = sd_netlink_message_exit_container(message);
2686 if (r < 0)
0d411b7f 2687 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW
2688 }
2689
4c78dc17
YW
2690 if (!manager->test_mode) {
2691 /* Do not update state files when running in test mode. */
2692 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2693 return log_oom_debug();
0d411b7f 2694
4c78dc17
YW
2695 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2696 return log_oom_debug();
0d411b7f 2697
4c78dc17
YW
2698 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2699 return log_oom_debug();
2700 }
0d411b7f 2701
0c9ee5d5
YW
2702 link = new(Link, 1);
2703 if (!link)
2704 return -ENOMEM;
2705
2706 *link = (Link) {
2707 .n_ref = 1,
2708 .state = LINK_STATE_PENDING,
2709 .online_state = _LINK_ONLINE_STATE_INVALID,
c2eb7753 2710 .automatic_reconfigure_ratelimit = (const RateLimit) { .interval = 10 * USEC_PER_SEC, .burst = 5 },
0c9ee5d5
YW
2711 .ifindex = ifindex,
2712 .iftype = iftype,
2713 .ifname = TAKE_PTR(ifname),
2714 .kind = TAKE_PTR(kind),
2715
11cee6ef
YW
2716 .bridge_vlan_pvid = UINT16_MAX,
2717
7d0d832d
YW
2718 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2719
0d411b7f
YW
2720 .state_file = TAKE_PTR(state_file),
2721 .lease_file = TAKE_PTR(lease_file),
2722 .lldp_file = TAKE_PTR(lldp_file),
2723
0c9ee5d5
YW
2724 .n_dns = UINT_MAX,
2725 .dns_default_route = -1,
2726 .llmnr = _RESOLVE_SUPPORT_INVALID,
2727 .mdns = _RESOLVE_SUPPORT_INVALID,
2728 .dnssec_mode = _DNSSEC_MODE_INVALID,
2729 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2730 };
2731
6eab614d 2732 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2733 if (r < 0)
0d411b7f 2734 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW
2735
2736 link->manager = manager;
2737
0d411b7f 2738 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2739 if (r < 0)
0d411b7f 2740 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2741
8a77e245
YW
2742 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2743 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2744
9c5b8d46
2745 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2746 * message arrived too early. Request the wireless link information again.
2747 */
2748 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2749 r = link_get_wlan_interface(link);
2750 if (r < 0)
2751 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2752 }
2753
0c9ee5d5 2754 *ret = TAKE_PTR(link);
0c9ee5d5
YW
2755 return 0;
2756}
2757
0d411b7f 2758int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW
2759 Link *link = NULL;
2760 NetDev *netdev = NULL;
2761 uint16_t type;
2762 const char *name;
2763 int r, ifindex;
2764
2765 assert(rtnl);
2766 assert(message);
0d411b7f 2767 assert(manager);
3be9d62a
YW
2768
2769 if (sd_netlink_message_is_error(message)) {
2770 r = sd_netlink_message_get_errno(message);
2771 if (r < 0)
2772 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2773
2774 return 0;
2775 }
2776
2777 r = sd_netlink_message_get_type(message, &type);
2778 if (r < 0) {
2779 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2780 return 0;
2781 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2782 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2783 return 0;
2784 }
2785
2786 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2787 if (r < 0) {
2788 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2789 return 0;
2790 } else if (ifindex <= 0) {
2791 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2792 return 0;
2793 }
2794
2795 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2796 if (r < 0) {
2797 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2798 return 0;
2799 }
2800
6eab614d 2801 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2802 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW
2803
2804 switch (type) {
2805 case RTM_NEWLINK:
0d411b7f
YW
2806 if (netdev) {
2807 /* netdev exists, so make sure the ifindex matches */
2808 r = netdev_set_ifindex(netdev, message);
2809 if (r < 0) {
66141164 2810 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW
2811 return 0;
2812 }
2813 }
2814
3be9d62a
YW
2815 if (!link) {
2816 /* link is new, so add it */
0d411b7f 2817 r = link_new(manager, message, &link);
3be9d62a 2818 if (r < 0) {
0d411b7f 2819 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW
2820 return 0;
2821 }
3be9d62a 2822
0d411b7f 2823 r = link_update(link, message);
3be9d62a 2824 if (r < 0) {
66141164 2825 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2826 link_enter_failed(link);
3be9d62a
YW
2827 return 0;
2828 }
3be9d62a 2829
0d411b7f
YW
2830 r = link_check_initialized(link);
2831 if (r < 0) {
66141164 2832 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW
2833 link_enter_failed(link);
2834 return 0;
2835 }
2836 } else {
2837 r = link_update(link, message);
2838 if (r < 0) {
66141164 2839 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW
2840 link_enter_failed(link);
2841 return 0;
2842 }
40695457
YW
2843 if (r > 0) {
2844 r = link_reconfigure_impl(link, /* force = */ false);
2845 if (r < 0) {
2846 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2847 link_enter_failed(link);
2848 return 0;
2849 }
2850 }
3be9d62a 2851 }
3be9d62a
YW
2852 break;
2853
2854 case RTM_DELLINK:
2855 link_drop(link);
2856 netdev_drop(netdev);
3be9d62a
YW
2857 break;
2858
2859 default:
04499a70 2860 assert_not_reached();
3be9d62a
YW
2861 }
2862
2863 return 1;
2864}
2865
79c6e114
YW
2866int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2867 uint16_t message_type;
2868 int r;
2869
2870 assert(m);
2871 assert(link);
2872 assert(error_msg);
2873
2874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2875 return 0;
2876
2877 r = sd_netlink_message_get_errno(m);
2878 if (r < 0) {
2879 log_link_message_warning_errno(link, m, r, error_msg);
2880 link_enter_failed(link);
2881 return 0;
2882 }
2883
2884 r = sd_netlink_message_get_type(m, &message_type);
2885 if (r < 0) {
2886 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2887 return 0;
2888 }
2889 if (message_type != RTM_NEWLINK) {
2890 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2891 return 0;
2892 }
2893
2894 r = link_update(link, m);
2895 if (r < 0) {
2896 link_enter_failed(link);
2897 return 0;
2898 }
2899
2900 return 1;
2901}
2902
2903int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2904 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2905 int r;
2906
2907 assert(link);
2908 assert(link->manager);
2909 assert(link->manager->rtnl);
2910 assert(callback);
2911
2912 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2913 if (r < 0)
2914 return r;
2915
2916 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2917 link_netlink_destroy_callback, link);
2918 if (r < 0)
2919 return r;
2920
2921 link_ref(link);
2922 return 0;
2923}
2924
fe8db0c5 2925static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2926 [LINK_STATE_PENDING] = "pending",
bd08ce56 2927 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2928 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS
2929 [LINK_STATE_CONFIGURED] = "configured",
2930 [LINK_STATE_UNMANAGED] = "unmanaged",
2931 [LINK_STATE_FAILED] = "failed",
2932 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG
2933};
2934
2935DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW
2936
2937int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2938 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS
2939 static const char* map[] = {
2940 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2941 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS
2942 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2943 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2944 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2945 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2946 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2947 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2948 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2949 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2950 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2951 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2952 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS
2953 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2954 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2955 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2956 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2957 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2958 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW
2959 };
2960
2961 assert(ret);
2962
2963 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS
2964 if (FLAGS_SET(flags, 1 << i) && map[i])
2965 if (!strextend_with_separator(&str, ",", map[i]))
2966 return -ENOMEM;
7ae55b78
YW
2967
2968 *ret = TAKE_PTR(str);
2969 return 0;
2970}
2971
2972static const char * const kernel_operstate_table[] = {
2973 [IF_OPER_UNKNOWN] = "unknown",
2974 [IF_OPER_NOTPRESENT] = "not-present",
2975 [IF_OPER_DOWN] = "down",
2976 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2977 [IF_OPER_TESTING] = "testing",
2978 [IF_OPER_DORMANT] = "dormant",
2979 [IF_OPER_UP] = "up",
2980};
2981
2982DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);