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network/ndisc: also drop SLAAC addresses and routes on reconfiguring
[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
a0e99a37 1118 r = link_drop_managed_routes(link);
3104883d 1119
1339b950
ZJS		 1120 RET_GATHER(r, link_drop_managed_nexthops(link));
1121 RET_GATHER(r, link_drop_managed_addresses(link));
1122 RET_GATHER(r, link_drop_managed_neighbors(link));
1123 RET_GATHER(r, link_drop_managed_routing_policy_rules(link));
3104883d 1124
0b81225e 1125 return r;
3104883d
SS		 1126}
1127
b4564f4e
YW		 1128static void link_foreignize_config(Link *link) {
1129 assert(link);
1130 assert(link->manager);
1131
1132 link_foreignize_routes(link);
1133 link_foreignize_nexthops(link);
1134 link_foreignize_addresses(link);
1135 link_foreignize_neighbors(link);
1136 link_foreignize_routing_policy_rules(link);
1137}
1138
c3b94251 1139static int link_configure(Link *link) {
4ecdcb07
YW		 1140 int r;
1141
ef1ba606 1142 assert(link);
b22d8a00 1143 assert(link->network);
bd08ce56 1144 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1145
1187fc33
YW		 1146 link_set_state(link, LINK_STATE_CONFIGURING);
1147
3cf58ef3
YW		 1148 r = link_new_bound_to_list(link);
1149 if (r < 0)
1150 return r;
1151
1dec9d81 1152 r = link_request_traffic_control(link);
4ecdcb07
YW		 1153 if (r < 0)
1154 return r;
1155
941f8e13
YW		 1156 r = link_configure_mtu(link);
1157 if (r < 0)
1158 return r;
1159
7558f9e7
YW		 1160 if (link->iftype == ARPHRD_CAN) {
1161 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1162 r = link_request_to_set_can(link);
1163 if (r < 0)
1164 return r;
1165
1166 return link_request_to_activate(link);
1167 }
1168
cb8453cc 1169 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1170 if (r < 0)
1171 return r;
1172
5e0534f1 1173 r = link_set_sysctl(link);
b69c3180
SS		 1174 if (r < 0)
1175 return r;
8749cbcd 1176
d05c332c 1177 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1178 if (r < 0)
1179 return r;
1180
72e65e6f
YW		 1181 r = link_request_to_set_ipoib(link);
1182 if (r < 0)
1183 return r;
1184
1187fc33 1185 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1186 if (r < 0)
1187 return r;
1188
1187fc33 1189 r = link_request_to_set_group(link);
99d2baa2
SS		 1190 if (r < 0)
1191 return r;
1192
1187fc33
YW		 1193 r = link_request_to_set_addrgen_mode(link);
1194 if (r < 0)
1195 return r;
1196
1197 r = link_request_to_set_master(link);
1198 if (r < 0)
1199 return r;
1200
1201 r = link_request_stacked_netdevs(link);
1202 if (r < 0)
1203 return r;
1204
1205 r = link_request_to_set_bond(link);
1206 if (r < 0)
1207 return r;
1208
1209 r = link_request_to_set_bridge(link);
1210 if (r < 0)
1211 return r;
1212
1213 r = link_request_to_set_bridge_vlan(link);
1214 if (r < 0)
1215 return r;
1216
1217 r = link_request_to_activate(link);
89fe6535
SS		 1218 if (r < 0)
1219 return r;
1220
2ffd6d73
YW		 1221 r = ipv4ll_configure(link);
1222 if (r < 0)
1223 return r;
64b21ece 1224
ccffa166 1225 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1226 if (r < 0)
1227 return r;
eb34d4af 1228
ccffa166 1229 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1230 if (r < 0)
1231 return r;
f5a8c43f 1232
ba4c7184 1233 r = link_request_ndisc(link);
2ffd6d73
YW		 1234 if (r < 0)
1235 return r;
4138fb2c 1236
1d28a3cf
YW		 1237 r = link_request_dhcp_server(link);
1238 if (r < 0)
1239 return r;
1240
a254fab2 1241 r = link_request_radv(link);
086b8853
YW		 1242 if (r < 0)
1243 return r;
7465dd22 1244
2ffd6d73
YW		 1245 r = link_lldp_rx_configure(link);
1246 if (r < 0)
1247 return r;
ce43e484 1248
c01b9b87
YW		 1249 r = link_lldp_tx_configure(link);
1250 if (r < 0)
1251 return r;
1252
5e3bb5da
YW		 1253 r = link_drop_foreign_config(link);
1254 if (r < 0)
1255 return r;
4c649652 1256
1187fc33
YW		 1257 r = link_request_static_configs(link);
1258 if (r < 0)
1259 return r;
1260
1261 if (!link_has_carrier(link))
1262 return 0;
1263
1264 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1265}
1266
170e88c8
YW		 1267static int link_get_network(Link *link, Network **ret) {
1268 Network *network;
1a3caa49 1269 int r;
170e88c8
YW		 1270
1271 assert(link);
1272 assert(link->manager);
1273 assert(ret);
1274
1275 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1276 bool warn = false;
1277
1a3caa49 1278 r = net_match_config(
170e88c8 1279 &network->match,
8de56fb3 1280 link->dev,
52135071
YW		 1281 &link->hw_addr,
1282 &link->permanent_hw_addr,
170e88c8
YW		 1283 link->driver,
1284 link->iftype,
65022cd7 1285 link->kind,
170e88c8
YW		 1286 link->ifname,
1287 link->alternative_names,
1288 link->wlan_iftype,
1289 link->ssid,
1a3caa49
YW		 1290 &link->bssid);
1291 if (r < 0)
1292 return r;
1293 if (r == 0)
170e88c8
YW		 1294 continue;
1295
8de56fb3 1296 if (network->match.ifname && link->dev) {
170e88c8
YW		 1297 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1298 const char *attr;
1299
8de56fb3 1300 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1301 (void) safe_atou8(attr, &name_assign_type);
1302
1303 warn = name_assign_type == NET_NAME_ENUM;
1304 }
1305
1306 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1307 "found matching network '%s'%s.",
1308 network->filename,
1309 warn ? ", based on potentially unpredictable interface name" : "");
1310
1311 if (network->unmanaged)
1312 return -ENOENT;
1313
1314 *ret = network;
1315 return 0;
1316 }
1317
1318 return -ENOENT;
1319}
1320
8a4ad01a 1321int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1322 Network *network = NULL;
9aa2585e 1323 NetDev *netdev = NULL;
ad932b15
YW		 1324 int r;
1325
5a1860f7 1326 assert(link);
572b21d9 1327
4faca0a3 1328 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1329 return 0;
1330
9aa2585e
YW		 1331 r = netdev_get(link->manager, link->ifname, &netdev);
1332 if (r < 0 && r != -ENOENT)
1333 return r;
1334
170e88c8 1335 r = link_get_network(link, &network);
cb71e9c6 1336 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1337 return r;
1338
fb961119
YW		 1339 if (link->state != LINK_STATE_UNMANAGED && !network)
1340 /* If link is in initialized state, then link->network is also NULL. */
1341 force = true;
1342
99b8517c 1343 if (link->network == network && !force)
ad932b15
YW		 1344 return 0;
1345
fb961119 1346 if (network) {
b993e7e7
YW		 1347 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1348
fb961119 1349 if (link->state == LINK_STATE_INITIALIZED)
b993e7e7
YW		 1350 log_link_info(link, "Configuring with %s%s%s%s.",
1351 network->filename,
1352 isempty(joined) ? "" : " (dropins: ",
1353 joined,
1354 isempty(joined) ? "" : ")");
fb961119 1355 else
b993e7e7
YW		 1356 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1357 network->filename,
1358 isempty(joined) ? "" : " (dropins: ",
1359 joined,
1360 isempty(joined) ? "" : ")");
fb961119
YW		 1361 } else
1362 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1363 "Unmanaging interface.");
ad932b15
YW		 1364
1365 /* Dropping old .network file */
2a99eed0 1366 r = link_stop_engines(link, false);
572b21d9 1367 if (r < 0)
ad932b15 1368 return r;
ad932b15 1369
4303e980
YW		 1370 r = link_drop_requests(link);
1371 if (r < 0)
1372 return r;
19d9a5ad 1373
81db4f3d 1374 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1375 /* When a new/updated .network file is assigned, first make all configs (addresses,
1376 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1377 * link_drop_foreign_config() in link_configure().
1378 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1379 * here we need to drop the configs such as addresses, routes, and so on configured by
1380 * the previously assigned .network file. */
b4564f4e
YW		 1381 link_foreignize_config(link);
1382 else {
a0e99a37
YW		 1383 /* Remove all managed configs. Note, foreign configs are removed in later by
1384 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1385 r = link_drop_managed_config(link);
b4564f4e
YW		 1386 if (r < 0)
1387 return r;
1388 }
ad932b15 1389
3cf58ef3
YW		 1390 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1391 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1392 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1393 * map here, as it depends on .network files assigned to other links. */
1394 link_free_bound_to_list(link);
1395
ad932b15
YW		 1396 link_free_engines(link);
1397 link->network = network_unref(link->network);
1398
9aa2585e
YW		 1399 netdev_unref(link->netdev);
1400 link->netdev = netdev_ref(netdev);
1401
cb71e9c6
YW		 1402 if (!network) {
1403 link_set_state(link, LINK_STATE_UNMANAGED);
1404 return 0;
1405 }
1406
ad932b15 1407 /* Then, apply new .network file */
9092113d 1408 link->network = network_ref(network);
b156a95d 1409 link_update_operstate(link, true);
9092113d 1410 link_dirty(link);
ad932b15 1411
ad932b15 1412 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1413 link->activated = false;
ad932b15 1414
ad932b15
YW		 1415 r = link_configure(link);
1416 if (r < 0)
1417 return r;
1418
0e397560 1419 return 1;
ad932b15
YW		 1420}
1421
96f5f9ef 1422static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1423 int r;
1424
d09a179e
YW		 1425 assert(link);
1426
5a1860f7
YW		 1427 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1428 if (r <= 0)
1429 return r;
1430
7f80fa12 1431 r = link_reconfigure_impl(link, force);
d09a179e 1432 if (r < 0) {
572b21d9 1433 link_enter_failed(link);
d09a179e
YW		 1434 return 0;
1435 }
572b21d9 1436
d09a179e 1437 return r;
572b21d9
YW		 1438}
1439
5a1860f7 1440static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1441 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1442}
572b21d9 1443
5a1860f7 1444static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1445 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1446}
1447
a39a9ac8 1448int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1449 int r;
1450
1451 assert(link);
d09a179e 1452
8bceafa7 1453 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1454 * the function from being called multiple times simultaneously, refuse to reconfigure the
1455 * interface in these cases. */
8bceafa7 1456 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1457 return 0; /* 0 means no-op. */
2c0d7ed3 1458
a39a9ac8 1459 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1460 if (r < 0)
1461 return r;
1462
8bceafa7 1463 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1464}
1465
1e869a5d
YW		 1466typedef struct ReconfigureData {
1467 Link *link;
1468 Manager *manager;
1469 sd_bus_message *message;
1470} ReconfigureData;
1471
1472static void reconfigure_data_destroy_callback(ReconfigureData *data) {
1473 int r;
1474
1475 assert(data);
1476 assert(data->link);
1477 assert(data->manager);
1478 assert(data->manager->reloading > 0);
1479 assert(data->message);
1480
1481 link_unref(data->link);
1482
1483 data->manager->reloading--;
1484 if (data->manager->reloading <= 0) {
1485 r = sd_bus_reply_method_return(data->message, NULL);
1486 if (r < 0)
1487 log_warning_errno(r, "Failed to send reply for 'Reload' DBus method, ignoring: %m");
1488 }
1489
1490 sd_bus_message_unref(data->message);
1491 free(data);
1492}
1493
1494static int reconfigure_handler_on_bus_method_reload(sd_netlink *rtnl, sd_netlink_message *m, ReconfigureData *data) {
1495 assert(data);
1496 assert(data->link);
1497 return link_reconfigure_handler_internal(rtnl, m, data->link, /* force = */ false);
1498}
1499
1500int link_reconfigure_on_bus_method_reload(Link *link, sd_bus_message *message) {
1501 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1502 _cleanup_free_ ReconfigureData *data = NULL;
1503 int r;
1504
1505 assert(link);
1506 assert(link->manager);
1507 assert(link->manager->rtnl);
1508 assert(message);
1509
1510 /* See comments in link_reconfigure() above. */
1511 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
1512 return 0;
1513
1514 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
1515 if (r < 0)
1516 return r;
1517
1518 data = new(ReconfigureData, 1);
1519 if (!data)
1520 return -ENOMEM;
1521
1522 r = netlink_call_async(link->manager->rtnl, NULL, req,
1523 reconfigure_handler_on_bus_method_reload,
1524 reconfigure_data_destroy_callback, data);
1525 if (r < 0)
1526 return r;
1527
1528 *data = (ReconfigureData) {
1529 .link = link_ref(link),
1530 .manager = link->manager,
1531 .message = sd_bus_message_ref(message),
1532 };
1533
1534 link->manager->reloading++;
1535
1536 TAKE_PTR(data);
1537 return 0;
1538}
1539
e6bf7774 1540static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1541 int r;
1542
1543 assert(link);
505f8da7
TG		 1544 assert(link->manager);
1545
faa2e64f
YW		 1546 if (link->manager->test_mode) {
1547 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1548 link_set_state(link, LINK_STATE_UNMANAGED);
1549 return 0;
1550 }
1551
40695457
YW		 1552 if (link->state == LINK_STATE_PENDING) {
1553 log_link_debug(link, "Link state is up-to-date");
1554 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1555
40695457
YW		 1556 r = link_new_bound_by_list(link);
1557 if (r < 0)
1558 return r;
0d4ad91d 1559
40695457
YW		 1560 r = link_handle_bound_by_list(link);
1561 if (r < 0)
1562 return r;
1563 }
0d4ad91d 1564
fb961119 1565 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1566}
1567
302a796f 1568static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1569 int r;
1570
5a1860f7
YW		 1571 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1572 if (r <= 0)
0b54c870 1573 return r;
572b21d9 1574
4ff296b0
YW		 1575 r = link_initialized_and_synced(link);
1576 if (r < 0)
1577 link_enter_failed(link);
5a1860f7
YW		 1578
1579 return 0;
e6bf7774
YW		 1580}
1581
3be9d62a 1582static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1583 int r;
1584
4f561e8e 1585 assert(link);
4f561e8e
TG		 1586 assert(device);
1587
160203e9
YW		 1588 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1589 * or sysattrs) may be outdated. */
8de56fb3 1590 device_unref_and_replace(link->dev, device);
4f561e8e 1591
3b1dbdf0
YW		 1592 if (link->dhcp_client) {
1593 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1594 if (r < 0)
1595 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1596 }
1597
1598 if (link->dhcp6_client) {
1599 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1600 if (r < 0)
1601 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1602 }
1603
b0ff6dea
YW		 1604 r = link_set_sr_iov_ifindices(link);
1605 if (r < 0)
1606 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1607
40695457
YW		 1608 if (link->state != LINK_STATE_PENDING)
1609 return link_reconfigure(link, /* force = */ false);
679b3605 1610
79008bdd 1611 log_link_debug(link, "udev initialized link");
4f561e8e 1612
3c9b8860
TG		 1613 /* udev has initialized the link, but we don't know if we have yet
1614 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1615 * when it returns we know that the pending NEWLINKs have already been
1616 * processed and that we are up-to-date */
4f561e8e 1617
5a1860f7 1618 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1619}
1620
0d411b7f 1621static int link_check_initialized(Link *link) {
51517f9e 1622 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1623 int r;
505f8da7 1624
0d411b7f 1625 assert(link);
505f8da7 1626
82f52245 1627 if (!udev_available())
0d411b7f 1628 return link_initialized_and_synced(link);
852a3916
YW		 1629
1630 /* udev should be around */
0ac655a6 1631 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1632 if (r < 0) {
1633 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1634 return 0;
1635 }
1636
1637 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1638 if (r < 0)
1639 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1640 if (r == 0) {
1641 /* not yet ready */
1642 log_link_debug(link, "link pending udev initialization...");
1643 return 0;
1644 }
1645
1646 r = device_is_renaming(device);
0d411b7f
YW		 1647 if (r < 0)
1648 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1649 if (r > 0) {
1650 log_link_debug(link, "Interface is being renamed, pending initialization.");
1651 return 0;
4f561e8e 1652 }
505f8da7 1653
13176bfe
YW		 1654 r = device_is_processing(device);
1655 if (r < 0)
1656 return log_link_warning_errno(link, r, "Failed to determine whether the device is being processed: %m");
1657 if (r > 0) {
1658 log_link_debug(link, "Interface is being processed by udevd, pending initialization.");
1659 return 0;
1660 }
1661
0d411b7f 1662 return link_initialized(link, device);
a748b692
TG		 1663}
1664
1fd3ac1e 1665int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1666 int r, ifindex;
ba87a61d 1667 const char *s;
1fd3ac1e 1668 Link *link;
3be9d62a
YW		 1669
1670 assert(m);
1671 assert(device);
1672
3be9d62a 1673 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1674 if (r < 0)
1675 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1676
75255a8d
YW		 1677 r = link_get_by_index(m, ifindex, &link);
1678 if (r < 0) {
1679 /* This error is not critical, as the corresponding rtnl message may be received later. */
1680 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1681 return 0;
1682 }
1683
1684 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1685 * object here. It will be removed only when rtnetlink says so. */
1686 if (action == SD_DEVICE_REMOVE) {
1687 link->dev = sd_device_unref(link->dev);
1688 return 0;
1689 }
1690
3be9d62a 1691 r = device_is_renaming(device);
1fd3ac1e
YW		 1692 if (r < 0)
1693 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1694 if (r > 0) {
1fd3ac1e 1695 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1696 /* TODO:
1697 * What happens when a device is initialized, then soon renamed after that? When we detect
1698 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1699 return 0;
1700 }
1701
ba87a61d
YW		 1702 r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s);
1703 if (r < 0 && r != -ENOENT)
1704 log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m");
1705 if (r >= 0 && !streq(s, "io.systemd.Network")) {
1706 log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s);
1707 link_set_state(link, LINK_STATE_UNMANAGED);
1708 return 0;
1709 }
1710
4b9a8c2b
YW		 1711 r = link_initialized(link, device);
1712 if (r < 0)
1713 link_enter_failed(link);
3be9d62a
YW		 1714
1715 return 0;
1716}
1717
9c0a72f9 1718static int link_carrier_gained(Link *link) {
6706ce2f 1719 bool force_reconfigure;
9c0a72f9
TG		 1720 int r;
1721
1722 assert(link);
1723
6706ce2f
YW		 1724 r = event_source_disable(link->carrier_lost_timer);
1725 if (r < 0)
1726 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1727
d9910948
YW		 1728 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1729 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1730 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1731 * restarted, and the correct network information will be gained.
1732 *
1733 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1734 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1735 * already assigned to the interface (in that case, the .network file does not have the SSID=
1736 * setting in the [Match] section), and the interface is already being configured. Of course,
1737 * there may exist another .network file with higher priority and a matching SSID= setting. But
1738 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1739 *
6706ce2f 1740 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1741 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1742 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1743 link->previous_ssid = mfree(link->previous_ssid);
1744
986b2514
AŠ		 1745 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1746 * profile wants to match on it with SSID= in its [Match] section.
1747 */
1748 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1749 r = link_get_wlan_interface(link);
1750 if (r < 0)
1751 return r;
1752 }
1753
081466bd
YW		 1754 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1755 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1756 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1757 r = link_reconfigure_impl(link, force_reconfigure);
1758 if (r != 0)
1759 return r;
b7ac1284 1760
aa9117c0
YW		 1761 r = link_handle_bound_by_list(link);
1762 if (r < 0)
1763 return r;
1764
600b7898
YW		 1765 if (link->iftype == ARPHRD_CAN)
1766 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1767 return 0;
600b7898 1768
b9ea3d2e 1769 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1770 r = link_acquire_dynamic_conf(link);
f0269653 1771 if (r < 0)
9c0a72f9 1772 return r;
6fc25497 1773
97108953 1774 r = link_request_static_configs(link);
6fc25497
SS		 1775 if (r < 0)
1776 return r;
9c0a72f9
TG		 1777 }
1778
aa9117c0 1779 return 0;
9c0a72f9
TG		 1780}
1781
6706ce2f
YW		 1782static int link_carrier_lost_impl(Link *link) {
1783 int r, ret = 0;
1784
1785 assert(link);
1786
1787 link->previous_ssid = mfree(link->previous_ssid);
1788
1789 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1790 return 0;
1791
1792 if (!link->network)
1793 return 0;
1794
1795 r = link_stop_engines(link, false);
1796 if (r < 0)
1797 ret = r;
1798
a0e99a37 1799 r = link_drop_managed_config(link);
6706ce2f
YW		 1800 if (r < 0 && ret >= 0)
1801 ret = r;
1802
1803 return ret;
1804}
1805
1806static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1807 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1808 int r;
1809
6706ce2f
YW		 1810 r = link_carrier_lost_impl(link);
1811 if (r < 0) {
1812 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1813 link_enter_failed(link);
1814 }
1815
1816 return 0;
1817}
1818
9c0a72f9 1819static int link_carrier_lost(Link *link) {
b7326069
YW		 1820 uint16_t dhcp_mtu;
1821 usec_t usec;
9c0a72f9
TG		 1822 int r;
1823
1824 assert(link);
1825
aa9117c0
YW		 1826 r = link_handle_bound_by_list(link);
1827 if (r < 0)
1828 return r;
93b4dab5 1829
600b7898
YW		 1830 if (link->iftype == ARPHRD_CAN)
1831 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1832 return 0;
1833
f1c22cf4
YW		 1834 if (!link->network)
1835 return 0;
1836
b7326069
YW		 1837 if (link->network->ignore_carrier_loss_set)
1838 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1839 usec = link->network->ignore_carrier_loss_usec;
1840
1841 else if (link->network->bond && link->wlan_iftype > 0)
1842 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1843 * carrier to be lost. See #19832. */
1844 usec = 3 * USEC_PER_SEC;
1845
1846 else if (link->network->dhcp_use_mtu &&
1847 link->dhcp_lease &&
1848 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1849 dhcp_mtu != link->original_mtu)
1850 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1851 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1852 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1853 usec = 5 * USEC_PER_SEC;
1854
1855 else
27438545 1856 /* Otherwise, use the implied default value. */
b7326069
YW		 1857 usec = link->network->ignore_carrier_loss_usec;
1858
1859 if (usec == USEC_INFINITY)
aa9117c0 1860 return 0;
600b7898 1861
b7326069 1862 if (usec == 0)
6706ce2f
YW		 1863 return link_carrier_lost_impl(link);
1864
1865 return event_reset_time_relative(link->manager->event,
1866 &link->carrier_lost_timer,
ba4e0427 1867 CLOCK_BOOTTIME,
b7326069 1868 usec,
6706ce2f
YW		 1869 0,
1870 link_carrier_lost_handler,
1871 link,
1872 0,
1873 "link-carrier-loss",
1874 true);
0c9ee5d5
YW		 1875}
1876
0c9ee5d5
YW		 1877static int link_admin_state_up(Link *link) {
1878 int r;
1879
1880 assert(link);
1881
1882 /* This is called every time an interface admin state changes to up;
1883 * specifically, when IFF_UP flag changes from unset to set. */
1884
1885 if (!link->network)
1886 return 0;
1887
899b0e5e 1888 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1889 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1890 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1891 }
1892
1893 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1894 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1895 r = link_set_ipv6_mtu(link);
1896 if (r < 0)
1897 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1898
1899 return 0;
1900}
1901
1902static int link_admin_state_down(Link *link) {
1903 assert(link);
1904
1905 if (!link->network)
1906 return 0;
1907
899b0e5e 1908 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1909 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1910 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1911 }
1912
1913 return 0;
1914}
1915
0c9ee5d5
YW		 1916static bool link_is_enslaved(Link *link) {
1917 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1918 return true;
1919
1f024462 1920 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1921 return true;
1922
0c9ee5d5
YW		 1923 return false;
1924}
1925
0c9ee5d5
YW		 1926void link_update_operstate(Link *link, bool also_update_master) {
1927 LinkOperationalState operstate;
1928 LinkCarrierState carrier_state;
1929 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1930 LinkOnlineState online_state;
1931 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 1932 bool changed = false;
0c9ee5d5
YW		 1933
1934 assert(link);
1935
1936 if (link->kernel_operstate == IF_OPER_DORMANT)
1937 carrier_state = LINK_CARRIER_STATE_DORMANT;
1938 else if (link_has_carrier(link)) {
1939 if (link_is_enslaved(link))
1940 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1941 else
1942 carrier_state = LINK_CARRIER_STATE_CARRIER;
1943 } else if (link->flags & IFF_UP)
1944 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1945 else
1946 carrier_state = LINK_CARRIER_STATE_OFF;
1947
1948 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1949 Link *slave;
1950
1951 SET_FOREACH(slave, link->slaves) {
1952 link_update_operstate(slave, false);
1953
1954 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1955 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1956 }
1957 }
1958
60415c13 1959 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 1960
1961 /* Mapping of address and carrier state vs operational state
1962 * carrier state
1963 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1964 * ------------------------------------------------------------------------------
1965 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1966 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1967 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1968 */
1969
cf4dbd84
HH		 1970 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1971 operstate = LINK_OPERSTATE_ROUTABLE;
1972 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1973 operstate = LINK_OPERSTATE_DEGRADED;
1974 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1975 operstate = (LinkOperationalState) carrier_state;
1976 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1977 operstate = LINK_OPERSTATE_ROUTABLE;
1978 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1979 operstate = LINK_OPERSTATE_DEGRADED;
1980 else
1981 operstate = LINK_OPERSTATE_ENSLAVED;
1982
2278d9f6
YW		 1983 LinkOperationalStateRange req;
1984 link_required_operstate_for_online(link, &req);
1985
0c9ee5d5
YW		 1986 /* Only determine online state for managed links with RequiredForOnline=yes */
1987 if (!link->network || !link->network->required_for_online)
1988 online_state = _LINK_ONLINE_STATE_INVALID;
2278d9f6
YW		 1989
1990 else if (!operational_state_is_in_range(operstate, &req))
0c9ee5d5 1991 online_state = LINK_ONLINE_STATE_OFFLINE;
2278d9f6 1992
0c9ee5d5 1993 else {
a853cc99 1994 AddressFamily required_family = link_required_family_for_online(link);
0c9ee5d5
YW		 1995 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1996 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1997
1998 /* The operational state is within the range required for online.
1999 * If a particular address family is also required, we might revert
2000 * to offline in the blocks below. */
2001 online_state = LINK_ONLINE_STATE_ONLINE;
2002
2278d9f6 2003 if (req.min >= LINK_OPERSTATE_DEGRADED) {
0c9ee5d5
YW		 2004 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
2005 online_state = LINK_ONLINE_STATE_OFFLINE;
2006 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
2007 online_state = LINK_ONLINE_STATE_OFFLINE;
2008 }
2009
2278d9f6 2010 if (req.min >= LINK_OPERSTATE_ROUTABLE) {
0c9ee5d5
YW		 2011 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2012 online_state = LINK_ONLINE_STATE_OFFLINE;
2013 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2014 online_state = LINK_ONLINE_STATE_OFFLINE;
2015 }
2016 }
2017
2018 if (link->carrier_state != carrier_state) {
2019 link->carrier_state = carrier_state;
2020 changed = true;
2021 if (strv_extend(&p, "CarrierState") < 0)
2022 log_oom();
2023 }
2024
2025 if (link->address_state != address_state) {
2026 link->address_state = address_state;
2027 changed = true;
2028 if (strv_extend(&p, "AddressState") < 0)
2029 log_oom();
2030 }
0d4ad91d 2031
0c9ee5d5
YW		 2032 if (link->ipv4_address_state != ipv4_address_state) {
2033 link->ipv4_address_state = ipv4_address_state;
2034 changed = true;
2035 if (strv_extend(&p, "IPv4AddressState") < 0)
2036 log_oom();
2037 }
9c0a72f9 2038
0c9ee5d5
YW		 2039 if (link->ipv6_address_state != ipv6_address_state) {
2040 link->ipv6_address_state = ipv6_address_state;
2041 changed = true;
2042 if (strv_extend(&p, "IPv6AddressState") < 0)
2043 log_oom();
2044 }
9c0a72f9 2045
0c9ee5d5
YW		 2046 if (link->operstate != operstate) {
2047 link->operstate = operstate;
2048 changed = true;
2049 if (strv_extend(&p, "OperationalState") < 0)
2050 log_oom();
2051 }
9c0a72f9 2052
0c9ee5d5
YW		 2053 if (link->online_state != online_state) {
2054 link->online_state = online_state;
2055 changed = true;
2056 if (strv_extend(&p, "OnlineState") < 0)
2057 log_oom();
2058 }
9c0a72f9 2059
0c9ee5d5
YW		 2060 if (p)
2061 link_send_changed_strv(link, p);
2062 if (changed)
2063 link_dirty(link);
9c0a72f9 2064
0c9ee5d5
YW		 2065 if (also_update_master) {
2066 Link *master;
9c0a72f9 2067
0c9ee5d5
YW		 2068 if (link_get_master(link, &master) >= 0)
2069 link_update_operstate(master, true);
2070 }
9c0a72f9
TG		 2071}
2072
0c9ee5d5
YW		 2073#define FLAG_STRING(string, flag, old, new) \
2074 (((old ^ new) & flag) \
2075 ? ((old & flag) ? (" -" string) : (" +" string)) \
2076 : "")
2077
0d411b7f 2078static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 2079 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 2080 uint8_t operstate;
2081 unsigned flags;
d236718c
DS		 2082 int r;
2083
61135582 2084 assert(link);
0d411b7f 2085 assert(message);
61135582 2086
0d411b7f 2087 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 2088 if (r < 0)
0d411b7f 2089 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 2090
0d411b7f
YW		 2091 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
2092 if (r == -ENODATA)
2093 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 2094 operstate = link->kernel_operstate;
0d411b7f
YW		 2095 else if (r < 0)
2096 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 2097
0d411b7f 2098 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 2099 return 0;
2100
0c9ee5d5
YW		 2101 if (link->flags != flags) {
2102 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 2103
0c9ee5d5
YW		 2104 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",
2105 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
2106 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
2107 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
2108 FLAG_STRING("UP", IFF_UP, link->flags, flags),
2109 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
2110 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
2111 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
2112 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
2113 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
2114 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
2115 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
2116 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
2117 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
2118 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
2119 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
2120 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
2121 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
2122 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
2123 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 2124
0c9ee5d5
YW		 2125 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
2126 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
2127 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
2128 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
2129 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
2130 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
2131 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
2132 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 2133
0c9ee5d5
YW		 2134 if (unknown_flags_added)
2135 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 2136
0c9ee5d5
YW		 2137 if (unknown_flags_removed)
2138 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
2139 }
61135582 2140
0d411b7f
YW		 2141 link_was_admin_up = link->flags & IFF_UP;
2142 had_carrier = link_has_carrier(link);
2143
0c9ee5d5
YW		 2144 link->flags = flags;
2145 link->kernel_operstate = operstate;
36161cba 2146
0c9ee5d5 2147 link_update_operstate(link, true);
61135582 2148
0d411b7f
YW		 2149 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2150 log_link_info(link, "Link UP");
22936833 2151
0d411b7f
YW		 2152 r = link_admin_state_up(link);
2153 if (r < 0)
2154 return r;
2155 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
2156 log_link_info(link, "Link DOWN");
0d4ad91d 2157
0d411b7f 2158 r = link_admin_state_down(link);
0d4ad91d
AR		 2159 if (r < 0)
2160 return r;
7619683b
TG		 2161 }
2162
0d411b7f
YW		 2163 if (!had_carrier && link_has_carrier(link)) {
2164 log_link_info(link, "Gained carrier");
0d4ad91d 2165
0d411b7f 2166 r = link_carrier_gained(link);
30de2b89
YW		 2167 if (r < 0)
2168 return r;
0d411b7f
YW		 2169 } else if (had_carrier && !link_has_carrier(link)) {
2170 log_link_info(link, "Lost carrier");
2171
2172 r = link_carrier_lost(link);
0b54c870
YW		 2173 if (r < 0)
2174 return r;
b8941f74
TG		 2175 }
2176
0d411b7f
YW		 2177 return 0;
2178}
afe7fd56 2179
0d411b7f
YW		 2180static int link_update_master(Link *link, sd_netlink_message *message) {
2181 int master_ifindex, r;
7465dd22 2182
0d411b7f
YW		 2183 assert(link);
2184 assert(message);
69629de9 2185
0d411b7f
YW		 2186 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2187 if (r == -ENODATA)
2188 return 0;
2189 if (r < 0)
2190 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2191
571bf1aa
YW		 2192 if (master_ifindex == link->ifindex)
2193 master_ifindex = 0;
2194
74e95e3a
YW		 2195 if (master_ifindex != link->master_ifindex) {
2196 if (link->master_ifindex == 0)
2197 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
2198 else if (master_ifindex == 0)
2199 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
2200 else
2201 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2202 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2203
74e95e3a
YW		 2204 link_drop_from_master(link);
2205 link->master_ifindex = master_ifindex;
2206 }
413708d1 2207
0d411b7f
YW		 2208 r = link_append_to_master(link);
2209 if (r < 0)
2210 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2211
0d411b7f
YW		 2212 return 0;
2213}
807667f7 2214
e1658632
YW		 2215static int link_update_driver(Link *link, sd_netlink_message *message) {
2216 int r;
2217
2218 assert(link);
2219 assert(link->manager);
2220 assert(message);
2221
2222 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2223 if (link->ethtool_driver_read)
e1658632
YW		 2224 return 0;
2225
2226 /* When udevd is running, read the driver after the interface is initialized by udevd.
2227 * Otherwise, ethtool may not work correctly. See issue #22538.
2228 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2229 if (udev_available() && !link->dev)
e1658632
YW		 2230 return 0;
2231
6625c39e
YW		 2232 link->ethtool_driver_read = true;
2233
e1658632
YW		 2234 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2235 if (r < 0) {
2236 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2237 return 0;
2238 }
2239
2240 log_link_debug(link, "Found driver: %s", strna(link->driver));
2241
2242 if (streq_ptr(link->driver, "dsa")) {
2243 uint32_t dsa_master_ifindex = 0;
2244
2245 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2246 if (r < 0 && r != -ENODATA)
2247 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2248
2249 if (dsa_master_ifindex > INT_MAX) {
2250 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2251 dsa_master_ifindex);
2252 dsa_master_ifindex = 0;
2253 }
2254
2255 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2256 }
2257
40695457 2258 return 1; /* needs reconfigure */
e1658632
YW		 2259}
2260
6625c39e 2261static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2262 int r;
2263
2264 assert(link);
2265 assert(link->manager);
2266 assert(message);
2267
6625c39e 2268 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2269 return 0;
2270
2271 /* When udevd is running, read the permanent hardware address after the interface is
2272 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2273 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2274 if (udev_available() && !link->dev)
2275 return 0;
2276
2277 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2278 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2279 if (r == -ENODATA)
2280 return 0;
2281 if (r < 0)
2282 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2283
2284 link->ethtool_permanent_hw_addr_read = true;
2285
2286 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2287 if (r < 0)
2288 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2289
2290 return 0;
2291}
2292
2293static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2294 int r;
2295
2296 assert(link);
2297 assert(link->manager);
2298 assert(message);
2299
2300 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2301 return 0;
2302
2303 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2304 if (r < 0) {
2305 if (r != -ENODATA)
2306 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2307
6625c39e
YW		 2308 /* Fallback to ethtool for older kernels. */
2309 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2310 if (r < 0)
2311 return r;
e1658632
YW		 2312 }
2313
2314 if (link->permanent_hw_addr.length > 0)
2315 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2316
40695457 2317 return 1; /* needs reconfigure */
e1658632
YW		 2318}
2319
0d411b7f 2320static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2321 struct hw_addr_data addr;
0d411b7f 2322 int r;
d93d655c 2323
0d411b7f
YW		 2324 assert(link);
2325 assert(message);
dfc58b47 2326
0d411b7f
YW		 2327 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2328 if (r < 0 && r != -ENODATA)
2329 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2330
e2bacccd 2331 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2332 if (r == -ENODATA)
2333 return 0;
2334 if (r < 0)
fe321d45 2335 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2336
e2bacccd 2337 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2338 return 0;
a61bb41c 2339
de0f1579 2340 if (link->hw_addr.length == 0)
e2bacccd 2341 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2342 else {
e2341b6b
DT		 2343 log_link_debug(link, "Hardware address is changed: %s %s %s",
2344 HW_ADDR_TO_STR(&link->hw_addr),
2345 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2346 HW_ADDR_TO_STR(&addr));
0d411b7f 2347
e74f1d07 2348 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2349 }
2350
e2bacccd
YW		 2351 link->hw_addr = addr;
2352
fe321d45
YW		 2353 if (!hw_addr_is_null(&link->hw_addr)) {
2354 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2355 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2356 /* bonding master and its slaves have the same hardware address. */
2357 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2358 if (r < 0)
2359 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2360 }
0d411b7f 2361
0a14f83a 2362 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2363 if (r < 0)
2364 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2365
0d411b7f 2366 r = ipv4ll_update_mac(link);
a61bb41c 2367 if (r < 0)
0d411b7f 2368 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2369
0d411b7f
YW		 2370 r = dhcp4_update_mac(link);
2371 if (r < 0)
2372 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2373
0d411b7f
YW		 2374 r = dhcp6_update_mac(link);
2375 if (r < 0)
2376 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2377
2378 r = radv_update_mac(link);
2379 if (r < 0)
2380 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2381
3be64aa4 2382 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2383 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2384 if (r < 0)
0d411b7f
YW		 2385 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2386 }
d236718c 2387
35778343
YW		 2388 if (link->lldp_rx) {
2389 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2390 if (r < 0)
c01b9b87
YW		 2391 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2392 }
2393
2394 if (link->lldp_tx) {
2395 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2396 if (r < 0)
2397 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2398 }
2399
40695457 2400 return 1; /* needs reconfigure */
0d411b7f 2401}
a61bb41c 2402
0d411b7f 2403static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2404 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2405 int r;
a61bb41c 2406
0d411b7f
YW		 2407 assert(link);
2408 assert(message);
2409
2410 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2411 if (r == -ENODATA)
2412 return 0;
2413 if (r < 0)
2414 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2415 if (mtu == 0)
2416 return 0;
0d411b7f 2417
717ba5fc
YW		 2418 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2419 if (r < 0 && r != -ENODATA)
2420 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2421
2422 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2423 if (r < 0 && r != -ENODATA)
2424 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2425
717ba5fc
YW		 2426 if (max_mtu == 0)
2427 max_mtu = UINT32_MAX;
2428
2429 link->min_mtu = min_mtu;
2430 link->max_mtu = max_mtu;
2431
0d411b7f
YW		 2432 if (link->original_mtu == 0) {
2433 link->original_mtu = mtu;
717ba5fc
YW		 2434 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2435 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2436 }
2437
717ba5fc
YW		 2438 if (link->mtu == mtu)
2439 return 0;
2440
b5d0fd1e 2441 if (link->mtu != 0)
e2341b6b
DT		 2442 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2443 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2444 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2445
2446 link->mtu = mtu;
2447
2448 if (link->dhcp_client) {
2449 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2450 if (r < 0)
0d411b7f
YW		 2451 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2452 }
a61bb41c 2453
0d411b7f
YW		 2454 if (link->radv) {
2455 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2456 if (r < 0)
0d411b7f 2457 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2458 }
2459
2460 return 0;
dd3efc09 2461}
fe8db0c5 2462
0d411b7f
YW		 2463static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2464 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2465 int r;
2466
2467 assert(link);
2468 assert(message);
2469
2470 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2471 if (r == -ENODATA)
2368ff81 2472 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2473 * interface has no alternative name. */
2474 return 0;
2475 if (r < 0)
0d411b7f
YW		 2476 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2477
1b345c1e
YW		 2478 if (strv_equal(altnames, link->alternative_names))
2479 return 0;
2480
0d411b7f
YW		 2481 STRV_FOREACH(n, link->alternative_names)
2482 hashmap_remove(link->manager->links_by_name, *n);
2483
2484 strv_free_and_replace(link->alternative_names, altnames);
2485
2486 STRV_FOREACH(n, link->alternative_names) {
2487 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2488 if (r < 0)
2489 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2490 }
2491
40695457 2492 return 1; /* needs reconfigure */
0d411b7f
YW		 2493}
2494
2495static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2496 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2497 const char *ifname;
2498 int r;
2499
2500 assert(link);
2501 assert(message);
2502
2503 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2504 if (r == -ENODATA)
7802194a 2505 /* Hmm?? But ok. */
0d411b7f
YW		 2506 return 0;
2507 if (r < 0)
2508 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2509
2510 if (streq(ifname, link->ifname))
2511 return 0;
2512
01afd0f7
YW		 2513 r = format_ifname(link->ifindex, ifname_from_index);
2514 if (r < 0)
2515 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2516
2517 if (!streq(ifname, ifname_from_index)) {
2518 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2519 "with the name currently configured on the actual interface '%s'. Ignoring.",
2520 ifname, ifname_from_index);
2521 return 0;
2522 }
2523
0d411b7f
YW		 2524 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2525
2526 hashmap_remove(link->manager->links_by_name, link->ifname);
2527
2528 r = free_and_strdup(&link->ifname, ifname);
2529 if (r < 0)
2530 return log_oom_debug();
2531
2532 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2533 if (r < 0)
2534 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2535
54d1fdb2
YW		 2536 if (link->dhcp_client) {
2537 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2538 if (r < 0)
2539 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2540 }
2541
2542 if (link->dhcp6_client) {
2543 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2544 if (r < 0)
2545 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2546 }
2547
2548 if (link->ndisc) {
2549 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2550 if (r < 0)
2551 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2552 }
2553
2554 if (link->dhcp_server) {
2555 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2556 if (r < 0)
2557 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2558 }
2559
2560 if (link->radv) {
2561 r = sd_radv_set_ifname(link->radv, link->ifname);
2562 if (r < 0)
2563 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2564 }
2565
35778343
YW		 2566 if (link->lldp_rx) {
2567 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2568 if (r < 0)
c01b9b87
YW		 2569 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2570 }
2571
2572 if (link->lldp_tx) {
2573 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2574 if (r < 0)
2575 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2576 }
2577
2578 if (link->ipv4ll) {
2579 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2580 if (r < 0)
2581 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2582 }
2583
86173383
YW		 2584 r = ipv4acd_set_ifname(link);
2585 if (r < 0)
2586 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2587
40695457 2588 return 1; /* needs reconfigure */
0d411b7f
YW		 2589}
2590
2591static int link_update(Link *link, sd_netlink_message *message) {
40695457 2592 bool needs_reconfigure = false;
0d411b7f
YW		 2593 int r;
2594
2595 assert(link);
2596 assert(message);
2597
2598 r = link_update_name(link, message);
2599 if (r < 0)
2600 return r;
40695457 2601 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2602
2603 r = link_update_alternative_names(link, message);
2604 if (r < 0)
2605 return r;
40695457 2606 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2607
2608 r = link_update_mtu(link, message);
2609 if (r < 0)
2610 return r;
2611
e1658632
YW		 2612 r = link_update_driver(link, message);
2613 if (r < 0)
2614 return r;
40695457 2615 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2616
2617 r = link_update_permanent_hardware_address(link, message);
2618 if (r < 0)
2619 return r;
40695457 2620 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2621
0d411b7f
YW		 2622 r = link_update_hardware_address(link, message);
2623 if (r < 0)
2624 return r;
40695457 2625 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2626
2627 r = link_update_master(link, message);
2628 if (r < 0)
2629 return r;
2630
7d0d832d
YW		 2631 r = link_update_ipv6ll_addrgen_mode(link, message);
2632 if (r < 0)
2633 return r;
2634
40695457
YW		 2635 r = link_update_flags(link, message);
2636 if (r < 0)
2637 return r;
2638
11cee6ef
YW		 2639 r = link_update_bridge_vlan(link, message);
2640 if (r < 0)
2641 return r;
2642
40695457 2643 return needs_reconfigure;
0d411b7f
YW		 2644}
2645
0c9ee5d5
YW		 2646static Link *link_drop_or_unref(Link *link) {
2647 if (!link)
2648 return NULL;
2649 if (!link->manager)
2650 return link_unref(link);
2651 return link_drop(link);
2652}
2653
2654DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2655
2656static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2657 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2658 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2659 unsigned short iftype;
2660 int r, ifindex;
0c9ee5d5
YW		 2661
2662 assert(manager);
2663 assert(message);
2664 assert(ret);
2665
0c9ee5d5
YW		 2666 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2667 if (r < 0)
0d411b7f 2668 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2669 else if (ifindex <= 0)
0d411b7f 2670 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2671
2672 r = sd_rtnl_message_link_get_type(message, &iftype);
2673 if (r < 0)
0d411b7f 2674 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2675
2676 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2677 if (r < 0)
0d411b7f 2678 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2679
2680 /* check for link kind */
2681 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2682 if (r >= 0) {
0d411b7f
YW		 2683 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2684 if (r < 0 && r != -ENODATA)
2685 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2686 r = sd_netlink_message_exit_container(message);
2687 if (r < 0)
0d411b7f 2688 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2689 }
2690
4c78dc17
YW		 2691 if (!manager->test_mode) {
2692 /* Do not update state files when running in test mode. */
2693 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2694 return log_oom_debug();
0d411b7f 2695
4c78dc17
YW		 2696 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2697 return log_oom_debug();
0d411b7f 2698
4c78dc17
YW		 2699 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2700 return log_oom_debug();
2701 }
0d411b7f 2702
0c9ee5d5
YW		 2703 link = new(Link, 1);
2704 if (!link)
2705 return -ENOMEM;
2706
2707 *link = (Link) {
2708 .n_ref = 1,
2709 .state = LINK_STATE_PENDING,
2710 .online_state = _LINK_ONLINE_STATE_INVALID,
c2eb7753 2711 .automatic_reconfigure_ratelimit = (const RateLimit) { .interval = 10 * USEC_PER_SEC, .burst = 5 },
0c9ee5d5
YW		 2712 .ifindex = ifindex,
2713 .iftype = iftype,
2714 .ifname = TAKE_PTR(ifname),
2715 .kind = TAKE_PTR(kind),
2716
11cee6ef
YW		 2717 .bridge_vlan_pvid = UINT16_MAX,
2718
7d0d832d
YW		 2719 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2720
0d411b7f
YW		 2721 .state_file = TAKE_PTR(state_file),
2722 .lease_file = TAKE_PTR(lease_file),
2723 .lldp_file = TAKE_PTR(lldp_file),
2724
0c9ee5d5
YW		 2725 .n_dns = UINT_MAX,
2726 .dns_default_route = -1,
2727 .llmnr = _RESOLVE_SUPPORT_INVALID,
2728 .mdns = _RESOLVE_SUPPORT_INVALID,
2729 .dnssec_mode = _DNSSEC_MODE_INVALID,
2730 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2731 };
2732
6eab614d 2733 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2734 if (r < 0)
0d411b7f 2735 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2736
2737 link->manager = manager;
2738
0d411b7f 2739 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2740 if (r < 0)
0d411b7f 2741 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2742
8a77e245
YW		 2743 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2744 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2745
9c5b8d46
AŠ		 2746 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2747 * message arrived too early. Request the wireless link information again.
2748 */
2749 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2750 r = link_get_wlan_interface(link);
2751 if (r < 0)
2752 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2753 }
2754
0c9ee5d5 2755 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2756 return 0;
2757}
2758
0d411b7f 2759int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2760 Link *link = NULL;
2761 NetDev *netdev = NULL;
2762 uint16_t type;
2763 const char *name;
2764 int r, ifindex;
2765
2766 assert(rtnl);
2767 assert(message);
0d411b7f 2768 assert(manager);
3be9d62a
YW		 2769
2770 if (sd_netlink_message_is_error(message)) {
2771 r = sd_netlink_message_get_errno(message);
2772 if (r < 0)
2773 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2774
2775 return 0;
2776 }
2777
2778 r = sd_netlink_message_get_type(message, &type);
2779 if (r < 0) {
2780 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2781 return 0;
2782 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2783 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2784 return 0;
2785 }
2786
2787 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2788 if (r < 0) {
2789 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2790 return 0;
2791 } else if (ifindex <= 0) {
2792 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2793 return 0;
2794 }
2795
2796 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2797 if (r < 0) {
2798 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2799 return 0;
2800 }
2801
6eab614d 2802 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2803 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2804
2805 switch (type) {
2806 case RTM_NEWLINK:
0d411b7f
YW		 2807 if (netdev) {
2808 /* netdev exists, so make sure the ifindex matches */
2809 r = netdev_set_ifindex(netdev, message);
2810 if (r < 0) {
66141164 2811 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2812 return 0;
2813 }
2814 }
2815
3be9d62a
YW		 2816 if (!link) {
2817 /* link is new, so add it */
0d411b7f 2818 r = link_new(manager, message, &link);
3be9d62a 2819 if (r < 0) {
0d411b7f 2820 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2821 return 0;
2822 }
3be9d62a 2823
0d411b7f 2824 r = link_update(link, message);
3be9d62a 2825 if (r < 0) {
66141164 2826 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2827 link_enter_failed(link);
3be9d62a
YW		 2828 return 0;
2829 }
3be9d62a 2830
0d411b7f
YW		 2831 r = link_check_initialized(link);
2832 if (r < 0) {
66141164 2833 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2834 link_enter_failed(link);
2835 return 0;
2836 }
2837 } else {
2838 r = link_update(link, message);
2839 if (r < 0) {
66141164 2840 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2841 link_enter_failed(link);
2842 return 0;
2843 }
40695457
YW		 2844 if (r > 0) {
2845 r = link_reconfigure_impl(link, /* force = */ false);
2846 if (r < 0) {
2847 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2848 link_enter_failed(link);
2849 return 0;
2850 }
2851 }
3be9d62a 2852 }
3be9d62a
YW		 2853 break;
2854
2855 case RTM_DELLINK:
2856 link_drop(link);
2857 netdev_drop(netdev);
3be9d62a
YW		 2858 break;
2859
2860 default:
04499a70 2861 assert_not_reached();
3be9d62a
YW		 2862 }
2863
2864 return 1;
2865}
2866
79c6e114
YW		 2867int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2868 uint16_t message_type;
2869 int r;
2870
2871 assert(m);
2872 assert(link);
2873 assert(error_msg);
2874
2875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2876 return 0;
2877
2878 r = sd_netlink_message_get_errno(m);
2879 if (r < 0) {
2880 log_link_message_warning_errno(link, m, r, error_msg);
2881 link_enter_failed(link);
2882 return 0;
2883 }
2884
2885 r = sd_netlink_message_get_type(m, &message_type);
2886 if (r < 0) {
2887 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2888 return 0;
2889 }
2890 if (message_type != RTM_NEWLINK) {
2891 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2892 return 0;
2893 }
2894
2895 r = link_update(link, m);
2896 if (r < 0) {
2897 link_enter_failed(link);
2898 return 0;
2899 }
2900
2901 return 1;
2902}
2903
2904int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2905 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2906 int r;
2907
2908 assert(link);
2909 assert(link->manager);
2910 assert(link->manager->rtnl);
2911 assert(callback);
2912
2913 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2914 if (r < 0)
2915 return r;
2916
2917 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2918 link_netlink_destroy_callback, link);
2919 if (r < 0)
2920 return r;
2921
2922 link_ref(link);
2923 return 0;
2924}
2925
fe8db0c5 2926static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2927 [LINK_STATE_PENDING] = "pending",
bd08ce56 2928 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2929 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2930 [LINK_STATE_CONFIGURED] = "configured",
2931 [LINK_STATE_UNMANAGED] = "unmanaged",
2932 [LINK_STATE_FAILED] = "failed",
2933 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2934};
2935
2936DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2937
2938int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2939 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2940 static const char* map[] = {
2941 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2942 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2943 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2944 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2945 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2946 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2947 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2948 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2949 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2950 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2951 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2952 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2953 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2954 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2955 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2956 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2957 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2958 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2959 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2960 };
2961
2962 assert(ret);
2963
2964 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2965 if (FLAGS_SET(flags, 1 << i) && map[i])
2966 if (!strextend_with_separator(&str, ",", map[i]))
2967 return -ENOMEM;
7ae55b78
YW		 2968
2969 *ret = TAKE_PTR(str);
2970 return 0;
2971}
2972
2973static const char * const kernel_operstate_table[] = {
2974 [IF_OPER_UNKNOWN] = "unknown",
2975 [IF_OPER_NOTPRESENT] = "not-present",
2976 [IF_OPER_DOWN] = "down",
2977 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2978 [IF_OPER_TESTING] = "testing",
2979 [IF_OPER_DORMANT] = "dormant",
2980 [IF_OPER_UP] = "up",
2981};
2982
2983DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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