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coccinelle: simplify file exclusions
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
f579559b 3#include <linux/if.h>
8f815e8b 4#include <linux/if_arp.h>
518cd6b5 5#include <linux/if_link.h>
2a0d07d6 6#include <linux/netdevice.h>
1cf40697 7#include <net/if.h>
8430841b 8#include <sys/socket.h>
4cc7a82c 9#include <unistd.h>
f579559b 10
baa3fadf
DDM		 11#include "sd-bus.h"
12#include "sd-dhcp-client.h"
13#include "sd-dhcp-server.h"
14#include "sd-dhcp6-client.h"
15#include "sd-dhcp6-lease.h"
16#include "sd-ipv4ll.h"
17#include "sd-lldp-rx.h"
18#include "sd-ndisc.h"
19#include "sd-netlink.h"
20#include "sd-radv.h"
21
b5efdb8a 22#include "alloc-util.h"
8a77e245 23#include "arphrd-util.h"
1e4e5572 24#include "bitfield.h"
3be9d62a 25#include "device-util.h"
a7fa29b1 26#include "dns-domain.h"
baa3fadf 27#include "errno-util.h"
4bb7cc82 28#include "ethtool-util.h"
6706ce2f 29#include "event-util.h"
868258cf 30#include "format-ifname.h"
af664001 31#include "fs-util.h"
e2341b6b 32#include "glyph-util.h"
3ae6b3bf 33#include "logarithm.h"
baa3fadf 34#include "netif-util.h"
cf1d700d 35#include "netlink-util.h"
093e3533 36#include "networkd-address.h"
1cf40697 37#include "networkd-address-label.h"
9671ae9d 38#include "networkd-bridge-fdb.h"
ff9e0783 39#include "networkd-bridge-mdb.h"
11cee6ef 40#include "networkd-bridge-vlan.h"
d5ebcf65 41#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 42#include "networkd-dhcp-server.h"
ca5ad760
YW		 43#include "networkd-dhcp4.h"
44#include "networkd-dhcp6.h"
76a86ffd 45#include "networkd-ipv4acd.h"
ca5ad760 46#include "networkd-ipv4ll.h"
76c5a0f2 47#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4 48#include "networkd-link.h"
1cf40697 49#include "networkd-link-bus.h"
8e1ad1ea 50#include "networkd-lldp-tx.h"
23f53b99 51#include "networkd-manager.h"
1e7a0e21 52#include "networkd-ndisc.h"
e4a71bf3 53#include "networkd-neighbor.h"
75156ccb 54#include "networkd-nexthop.h"
19d9a5ad 55#include "networkd-queue.h"
7465dd22 56#include "networkd-radv.h"
a7fa29b1 57#include "networkd-resolve-hook.h"
3b6a3bde 58#include "networkd-route.h"
1cf40697 59#include "networkd-route-util.h"
bce67bbe 60#include "networkd-routing-policy-rule.h"
0fa8ee6c 61#include "networkd-setlink.h"
19d9a5ad 62#include "networkd-sriov.h"
3b5a4fc6 63#include "networkd-state-file.h"
19d9a5ad 64#include "networkd-sysctl.h"
986b2514 65#include "networkd-wifi.h"
f8a4c3d3 66#include "networkd-wwan-bus.h"
baa3fadf 67#include "ordered-set.h"
c94f6ab1 68#include "parse-util.h"
cf1d700d
TG		 69#include "set.h"
70#include "socket-util.h"
8b43440b 71#include "string-table.h"
baa3fadf 72#include "string-util.h"
51517f9e 73#include "strv.h"
34658df2 74#include "tc.h"
299ad32d 75#include "udev-util.h"
fc2f9534 76
2278d9f6
YW		 77void link_required_operstate_for_online(Link *link, LinkOperationalStateRange *ret) {
78 assert(link);
79 assert(ret);
80
81 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
a853cc99 82 /* If explicitly specified, use it as is. */
2278d9f6 83 *ret = link->network->required_operstate_for_online;
3255bda6 84 else if (link->iftype == ARPHRD_CAN)
a853cc99 85 /* CAN devices do not support addressing, hence defaults to 'carrier'. */
3255bda6
YW		 86 *ret = (const LinkOperationalStateRange) {
87 .min = LINK_OPERSTATE_CARRIER,
88 .max = LINK_OPERSTATE_CARRIER,
89 };
a853cc99
YW		 90 else if (link->network && link->network->bond)
91 /* Bonding slaves do not support addressing. */
92 *ret = (const LinkOperationalStateRange) {
93 .min = LINK_OPERSTATE_ENSLAVED,
94 .max = LINK_OPERSTATE_ENSLAVED,
95 };
96 else if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
97 /* Some of slave interfaces may be offline. */
98 *ret = (const LinkOperationalStateRange) {
99 .min = LINK_OPERSTATE_DEGRADED_CARRIER,
100 .max = LINK_OPERSTATE_ROUTABLE,
101 };
2278d9f6
YW		 102 else
103 *ret = LINK_OPERSTATE_RANGE_DEFAULT;
104}
105
a853cc99
YW		 106AddressFamily link_required_family_for_online(Link *link) {
107 assert(link);
108
109 if (link->network && link->network->required_family_for_online >= 0)
110 return link->network->required_family_for_online;
111
112 if (link->network && operational_state_range_is_valid(&link->network->required_operstate_for_online))
113 /* If RequiredForOnline= is explicitly specified, defaults to no. */
114 return ADDRESS_FAMILY_NO;
115
116 if (STRPTR_IN_SET(link->kind, "batadv", "bond", "bridge", "vrf"))
117 /* As the minimum required operstate for master interfaces is 'degraded-carrier',
118 * we should request an address assigned to the link for backward compatibility. */
119 return ADDRESS_FAMILY_YES;
120
121 return ADDRESS_FAMILY_NO;
122}
123
5e0534f1 124bool link_ipv6_enabled(Link *link) {
439689c6
SS		 125 assert(link);
126
127 if (!socket_ipv6_is_supported())
128 return false;
129
5fb5fae9 130 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 131 return false;
132
5fb5fae9
YW		 133 if (!link->network)
134 return false;
135
136 if (link->network->bond)
af9ba57a
YW		 137 return false;
138
291b6fee 139 if (link_ipv6ll_enabled(link))
adfeee49
YW		 140 return true;
141
142 if (network_has_static_ipv6_configurations(link->network))
143 return true;
144
145 return false;
439689c6
SS		 146}
147
fc35a9f8
YW		 148bool link_has_ipv6_connectivity(Link *link) {
149 LinkAddressState ipv6_address_state;
150
151 assert(link);
152
153 link_get_address_states(link, NULL, &ipv6_address_state, NULL);
154
155 switch (ipv6_address_state) {
156 case LINK_ADDRESS_STATE_ROUTABLE:
157 /* If the interface has a routable IPv6 address, then we assume yes. */
158 return true;
159
160 case LINK_ADDRESS_STATE_DEGRADED:
161 /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check
162 * there is an IPv6 default gateway. */
163 return link_has_default_gateway(link, AF_INET6);
164
165 case LINK_ADDRESS_STATE_OFF:
166 /* No IPv6 address. */
167 return false;
168
169 default:
170 assert_not_reached();
171 }
172}
173
e33232d4 174static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 175 assert(link);
176
d8d4db58
YW		 177 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
178 return false;
179
2fd3908b
YW		 180 if (!link->network)
181 return allow_unmanaged;
7191a57a 182
baa95d22
YW		 183 if (!link->network->configure_without_carrier) {
184 if (link->set_flags_messages > 0)
185 return false;
186
187 if (!link_has_carrier(link))
188 return false;
189 }
7191a57a 190
0fa8ee6c
YW		 191 if (link->set_link_messages > 0)
192 return false;
193
112a0972
YW		 194 if (!link->activated)
195 return false;
112a0972 196
7191a57a
YW		 197 return true;
198}
199
e33232d4
YW		 200bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
201 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
202}
203
5078e366
YW		 204bool link_is_ready_to_configure_by_name(Manager *manager, const char *name, bool allow_unmanaged) {
205 assert(manager);
206 assert(name);
207
208 Link *link;
209 if (link_get_by_name(manager, name, &link) < 0)
210 return false;
211
212 return link_is_ready_to_configure(link, allow_unmanaged);
213}
214
15761549
YW		 215void link_ntp_settings_clear(Link *link) {
216 link->ntp = strv_free(link->ntp);
217}
218
219void link_dns_settings_clear(Link *link) {
f5fbe71d 220 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 221 for (unsigned i = 0; i < link->n_dns; i++)
222 in_addr_full_free(link->dns[i]);
15761549 223 link->dns = mfree(link->dns);
f5fbe71d 224 link->n_dns = UINT_MAX;
15761549 225
6e4571f0
YW		 226 link->search_domains = ordered_set_free(link->search_domains);
227 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 228
229 link->dns_default_route = -1;
230 link->llmnr = _RESOLVE_SUPPORT_INVALID;
231 link->mdns = _RESOLVE_SUPPORT_INVALID;
232 link->dnssec_mode = _DNSSEC_MODE_INVALID;
233 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
234
25a9bd72 235 link->dnssec_negative_trust_anchors = set_free(link->dnssec_negative_trust_anchors);
15761549
YW		 236}
237
49e50134 238static void link_free_engines(Link *link) {
1a6bb31f
YW		 239 if (!link)
240 return;
241
242 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 243
1a6bb31f
YW		 244 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
245 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 246 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 247
35778343 248 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 249 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 250
5385e5f9
YW		 251 link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address);
252
1a6bb31f 253 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 254
1a6bb31f 255 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 256 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 257
1a6bb31f 258 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 259 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
260 ndisc_flush(link);
261
1a6bb31f
YW		 262 link->radv = sd_radv_unref(link->radv);
263}
264
4cf443e6 265static Link* link_free(Link *link) {
8301aa0b 266 assert(link);
f579559b 267
22583a00 268 (void) link_clear_sysctl_shadows(link);
6d9ef22a 269
15761549
YW		 270 link_ntp_settings_clear(link);
271 link_dns_settings_clear(link);
272
8eec0b9d 273 link->neighbors = set_free(link->neighbors);
8eec0b9d 274 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 275 link->qdiscs = set_free(link->qdiscs);
276 link->tclasses = set_free(link->tclasses);
adda1ed9 277
a27588d4 278 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 279
1a6bb31f 280 link_free_engines(link);
49699bac 281
b0ff6dea 282 set_free(link->sr_iov_virt_port_ifindices);
c166a070 283 free(link->ifname);
572b21d9 284 strv_free(link->alternative_names);
ceac4078 285 free(link->kind);
8d968fdd 286 free(link->ssid);
6706ce2f 287 free(link->previous_ssid);
c643bda5 288 free(link->driver);
6cad256d 289
a34e58d4 290 unlink_and_free(link->lease_file);
a34e58d4 291 unlink_and_free(link->state_file);
c166a070 292
8de56fb3 293 sd_device_unref(link->dev);
9aa2585e 294 netdev_unref(link->netdev);
b5db00e5 295
0d4ad91d 296 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 297 hashmap_free(link->bound_by_links);
298
4cf443e6 299 set_free(link->slaves);
033295c1 300
c9c908a6
YW		 301 network_unref(link->network);
302
6706ce2f 303 sd_event_source_disable_unref(link->carrier_lost_timer);
39283a1f 304 sd_event_source_disable_unref(link->ipv6_mtu_wait_synced_event_source);
6706ce2f 305
8301aa0b 306 return mfree(link);
14b746f7
TG		 307}
308
8301aa0b 309DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 310
4cf443e6
YW		 311DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
312 link_hash_ops,
313 void, trivial_hash_func, trivial_compare_func,
314 Link, link_unref);
315
6eab614d 316int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 317 Link *link;
11a7f229
TG		 318
319 assert(m);
c2aed128
YW		 320
321 if (ifindex <= 0)
322 return -EINVAL;
11a7f229 323
6eab614d 324 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 325 if (!link)
326 return -ENODEV;
327
0b54c870
YW		 328 if (ret)
329 *ret = link;
330 return 0;
331}
332
333int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
334 Link *link;
335
336 assert(m);
337 assert(ifname);
11a7f229 338
0b54c870
YW		 339 link = hashmap_get(m->links_by_name, ifname);
340 if (!link)
341 return -ENODEV;
342
343 if (ret)
344 *ret = link;
11a7f229
TG		 345 return 0;
346}
347
fe321d45
YW		 348int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
349 Link *link;
350
351 assert(m);
352 assert(hw_addr);
353
354 link = hashmap_get(m->links_by_hw_addr, hw_addr);
355 if (!link)
356 return -ENODEV;
357
358 if (ret)
359 *ret = link;
360 return 0;
361}
362
81357285
YW		 363int link_get_master(Link *link, Link **ret) {
364 assert(link);
365 assert(link->manager);
366 assert(ret);
367
368 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
369 return -ENODEV;
370
6eab614d 371 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 372}
373
af9ba57a 374void link_set_state(Link *link, LinkState state) {
e331e246
TG		 375 assert(link);
376
377 if (link->state == state)
378 return;
379
0beb9542
YW		 380 log_link_debug(link, "State changed: %s -> %s",
381 link_state_to_string(link->state),
382 link_state_to_string(state));
383
e331e246
TG		 384 link->state = state;
385
38c9ca53 386 link_send_changed(link, "AdministrativeState");
9092113d 387 link_dirty(link);
e331e246
TG		 388}
389
80a89d1a 390int link_stop_engines(Link *link, bool may_keep_dynamic) {
372acaad 391 int r, ret = 0;
111bb8f9
TG		 392
393 assert(link);
394 assert(link->manager);
395 assert(link->manager->event);
396
80a89d1a
YW		 397 bool keep_dynamic =
398 may_keep_dynamic &&
8c3d6d71
YW		 399 link->network &&
400 (link->manager->state == MANAGER_RESTARTING ||
80a89d1a 401 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DYNAMIC_ON_STOP));
80060352 402
80a89d1a 403 if (!keep_dynamic) {
372acaad
YW		 404 r = sd_dhcp_client_stop(link->dhcp_client);
405 if (r < 0)
406 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m"));
4eca221a
YW		 407
408 r = sd_ipv4ll_stop(link->ipv4ll);
409 if (r < 0)
410 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m"));
411
412 r = sd_dhcp6_client_stop(link->dhcp6_client);
413 if (r < 0)
414 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m"));
415
93378148 416 r = dhcp_pd_remove(link, /* only_marked= */ false);
4eca221a
YW		 417 if (r < 0)
418 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not remove DHCPv6 PD addresses and routes: %m"));
419
420 r = ndisc_stop(link);
421 if (r < 0)
422 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Discovery: %m"));
423
424 ndisc_flush(link);
111bb8f9
TG		 425 }
426
372acaad
YW		 427 r = sd_dhcp_server_stop(link->dhcp_server);
428 if (r < 0)
429 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 server: %m"));
2a99eed0 430
372acaad
YW		 431 r = sd_lldp_rx_stop(link->lldp_rx);
432 if (r < 0)
433 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Rx: %m"));
c01b9b87 434
372acaad
YW		 435 r = sd_lldp_tx_stop(link->lldp_tx);
436 if (r < 0)
437 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Tx: %m"));
9cc65242 438
372acaad
YW		 439 r = ipv4acd_stop(link);
440 if (r < 0)
441 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 ACD client: %m"));
051e77ca 442
372acaad
YW		 443 r = sd_radv_stop(link->radv);
444 if (r < 0)
445 RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Advertisement: %m"));
7465dd22 446
372acaad 447 return ret;
111bb8f9
TG		 448}
449
b22d8a00 450void link_enter_failed(Link *link) {
ef1ba606 451 assert(link);
f882c247 452
370e9930 453 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 454 return;
455
6a7a4e4d 456 log_link_warning(link, "Failed");
449f7554 457
e331e246 458 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 459
c2eb7753
YW		 460 if (!ratelimit_below(&link->automatic_reconfigure_ratelimit)) {
461 log_link_warning(link, "The interface entered the failed state frequently, refusing to reconfigure it automatically.");
462 goto stop;
463 }
464
465 log_link_info(link, "Trying to reconfigure the interface.");
2b07a321 466 if (link_reconfigure(link, LINK_RECONFIGURE_UNCONDITIONALLY) > 0)
021d39d3 467 return;
c2eb7753
YW		 468
469stop:
93378148 470 (void) link_stop_engines(link, /* may_keep_dynamic= */ false);
f882c247
TG		 471}
472
6accfd31
DA		 473void link_check_ready(Link *link) {
474 Address *a;
6accfd31
DA		 475
476 assert(link);
477
5f58af25
YW		 478 if (link->state == LINK_STATE_CONFIGURED)
479 return;
480
d19b9939
YW		 481 if (link->state != LINK_STATE_CONFIGURING)
482 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 483
484 if (!link->network)
a7f07cbe 485 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 486
7558f9e7
YW		 487 if (!link->tc_configured)
488 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 489
a7f07cbe
YW		 490 if (link->set_link_messages > 0)
491 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
492
493 if (!link->activated)
494 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
495
24b9c341 496 if (link->iftype == ARPHRD_CAN)
7558f9e7 497 /* let's shortcut things for CAN which doesn't need most of checks below. */
24b9c341 498 goto ready;
7558f9e7 499
879377ca
YW		 500 if (!link->stacked_netdevs_created)
501 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
502
76c5a0f2 503 if (!link->static_addresses_configured)
d19b9939 504 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 505
354bc760
YW		 506 if (!link->static_address_labels_configured)
507 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
508
e5b35bf6
YW		 509 if (!link->static_bridge_fdb_configured)
510 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
511
ff9e0783
YW		 512 if (!link->static_bridge_mdb_configured)
513 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
514
fdeba3f5
YW		 515 if (!link->static_ipv6_proxy_ndp_configured)
516 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
517
40ca350e
YW		 518 if (!link->static_neighbors_configured)
519 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
520
d19b9939
YW		 521 if (!link->static_nexthops_configured)
522 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 523
76c5a0f2
YW		 524 if (!link->static_routes_configured)
525 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
526
0e5ef6be 527 if (!link->static_routing_policy_rules_configured)
d19b9939 528 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 529
d19b9939
YW		 530 if (!link->sr_iov_configured)
531 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 532
f8a4c3d3
OA		 533 if (!link->bearer_configured)
534 return (void) log_link_debug(link, "%s(): Bearer has not been applied.", __func__);
535
4bcb8625
YW		 536 /* IPv6LL is assigned after the link gains its carrier. */
537 if (!link->network->configure_without_carrier &&
538 link_ipv6ll_enabled(link) &&
539 !in6_addr_is_set(&link->ipv6ll_address))
540 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
541
9e7d91ed
YW		 542 /* All static addresses must be ready. */
543 bool has_static_address = false;
544 SET_FOREACH(a, link->addresses) {
f8a4c3d3 545 if (!IN_SET(a->source, NETWORK_CONFIG_SOURCE_STATIC, NETWORK_CONFIG_SOURCE_MODEM_MANAGER))
9e7d91ed
YW		 546 continue;
547 if (!address_is_ready(a))
548 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
549 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
550 has_static_address = true;
551 }
552
553 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
554 if (has_static_address)
555 goto ready;
556
5f950e56
YW		 557 /* If no dynamic addressing protocol enabled, assume the interface is ready.
558 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
559 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
560 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
52672db3 561 (link->network->configure_without_carrier || !link_ndisc_enabled(link)))
5f950e56
YW		 562 goto ready;
563
564 bool ipv4ll_ready =
565 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
566 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
567 bool dhcp4_ready =
568 link_dhcp4_enabled(link) && link->dhcp4_configured &&
569 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
570 bool dhcp6_ready =
571 link_dhcp6_enabled(link) && link->dhcp6_configured &&
572 (!link->network->dhcp6_use_address ||
573 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
574 bool dhcp_pd_ready =
575 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
576 (!link->network->dhcp_pd_assign ||
577 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
578 bool ndisc_ready =
52672db3
YW		 579 link_ndisc_enabled(link) && link->ndisc_configured &&
580 (!link->network->ndisc_use_autonomous_prefix ||
5f950e56
YW		 581 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
582
195b83ed 583 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
93378148 584 if (dhcp_pd_is_uplink(link, link, /* accept_auto= */ false)) {
195b83ed 585 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
0ad8d953 586 sd_dhcp_lease_has_6rd(link->dhcp_lease)) {
b4054aff 587 if (!link->dhcp4_configured)
195b83ed
YW		 588 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
589 if (!dhcp_pd_ready)
590 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
591 }
592
593 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
fb70992d 594 sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
b4054aff 595 if (!link->dhcp6_configured)
195b83ed
YW		 596 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
597 if (!dhcp_pd_ready)
598 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
599 }
600 }
601
5f950e56
YW		 602 /* At least one dynamic addressing protocol is finished. */
603 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
604 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
605
606 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
607 __func__,
608 yes_no(ipv4ll_ready),
609 yes_no(dhcp4_ready),
610 yes_no(dhcp6_ready),
611 yes_no(dhcp_pd_ready),
612 yes_no(ndisc_ready));
613
614ready:
29836c16 615 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 616}
617
97108953 618static int link_request_static_configs(Link *link) {
f882c247
TG		 619 int r;
620
621 assert(link);
622 assert(link->network);
f5be5601 623 assert(link->state != _LINK_STATE_INVALID);
f882c247 624
354bc760 625 r = link_request_static_addresses(link);
0e5ef6be
YW		 626 if (r < 0)
627 return r;
628
354bc760 629 r = link_request_static_address_labels(link);
f3ef324d
YW		 630 if (r < 0)
631 return r;
e4a71bf3 632
e5b35bf6
YW		 633 r = link_request_static_bridge_fdb(link);
634 if (r < 0)
635 return r;
636
9a038aac
YW		 637 r = link_request_static_bridge_mdb(link);
638 if (r < 0)
639 return r;
640
fdeba3f5
YW		 641 r = link_request_static_ipv6_proxy_ndp_addresses(link);
642 if (r < 0)
643 return r;
644
40ca350e 645 r = link_request_static_neighbors(link);
682c65b0
YW		 646 if (r < 0)
647 return r;
bd6379ec 648
76c5a0f2 649 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 650 if (r < 0)
651 return r;
f882c247 652
76c5a0f2
YW		 653 r = link_request_static_routes(link, false);
654 if (r < 0)
655 return r;
656
657 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 658 if (r < 0)
659 return r;
d4cdbea5 660
f882c247
TG		 661 return 0;
662}
663
b8b0c1a0 664int link_request_stacked_netdevs(Link *link, NetDevLocalAddressType type) {
1187fc33 665 NetDev *netdev;
e16e4b3b
DS		 666 int r;
667
668 assert(link);
669
b8b0c1a0
YW		 670 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
671 return 0;
672
673 assert(link->network);
674
1187fc33 675 link->stacked_netdevs_created = false;
e16e4b3b 676
1187fc33 677 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b8b0c1a0
YW		 678 if (!netdev_needs_reconfigure(netdev, type))
679 continue;
680
b14686ff 681 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 682 if (r < 0)
683 return r;
684 }
e16e4b3b 685
bb916f35 686 if (link->create_stacked_netdev_messages == 0) {
1187fc33 687 link->stacked_netdevs_created = true;
bb916f35
YW		 688 link_check_ready(link);
689 }
e16e4b3b
DS		 690
691 return 0;
692}
693
8566df79 694static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 695 int r;
696
697 assert(link);
698
0f96a823
YW		 699 r = radv_start(link);
700 if (r < 0)
701 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 702
294f129b
YW		 703 r = ndisc_start(link);
704 if (r < 0)
705 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 706
294f129b
YW		 707 r = dhcp6_start(link);
708 if (r < 0)
709 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 710
e7ab854c
TG		 711 return 0;
712}
713
8566df79 714static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 715 int r;
716
717 assert(link);
ff254138
TG		 718 assert(link->manager);
719 assert(link->manager->event);
720
0107b769 721 if (link->dhcp_client) {
294f129b 722 r = dhcp4_start(link);
0107b769 723 if (r < 0)
294f129b 724 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 725
ccffa166 726 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 727
ccffa166 728 } else if (link->ipv4ll) {
59c27231
AK		 729 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
730 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
731 if (r < 0)
732 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
733 }
734
b5c83cd5 735 r = ipv4ll_start(link);
6a7a4e4d
LP		 736 if (r < 0)
737 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
b5c83cd5
YW		 738 if (r > 0)
739 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 740 }
741
c91f8f90
YW		 742 r = link_start_dhcp4_server(link);
743 if (r < 0)
744 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
ab486ef4 745
76a86ffd
YW		 746 r = ipv4acd_start(link);
747 if (r < 0)
748 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
749
6fc25497
SS		 750 return 0;
751}
752
8566df79 753static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 754 int r;
755
756 assert(link);
0f96a823 757 assert(link->network);
6fc25497 758
8566df79 759 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 760 if (r < 0)
761 return r;
762
94876904 763 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 764 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 765 if (r < 0)
766 return r;
767 }
768
a27588d4 769 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 770 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
771 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
772 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
773 * below will be called in radv_start(). */
a27588d4 774 r = dhcp_request_prefix_delegation(link);
0f96a823 775 if (r < 0)
a27588d4 776 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 777 }
778
c01b9b87
YW		 779 if (link->lldp_tx) {
780 r = sd_lldp_tx_start(link->lldp_tx);
781 if (r < 0)
782 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
783 }
8e1ad1ea 784
35778343
YW		 785 if (link->lldp_rx) {
786 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 787 if (r < 0)
788 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
789 }
790
ff254138
TG		 791 return 0;
792}
793
7657ec3e 794int link_ipv6ll_gained(Link *link) {
0c9ee5d5 795 int r;
deb2e523 796
0c9ee5d5 797 assert(link);
deb2e523 798
0c9ee5d5 799 log_link_info(link, "Gained IPv6LL");
deb2e523 800
7657ec3e
YW		 801 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
802 return 0;
0c9ee5d5 803
7657ec3e
YW		 804 r = link_acquire_dynamic_ipv6_conf(link);
805 if (r < 0)
806 return r;
0c9ee5d5 807
b8b0c1a0
YW		 808 r = link_request_stacked_netdevs(link, NETDEV_LOCAL_ADDRESS_IPV6LL);
809 if (r < 0)
810 return r;
811
7657ec3e 812 link_check_ready(link);
0c9ee5d5 813 return 0;
deb2e523
TG		 814}
815
112a0972 816int link_handle_bound_to_list(Link *link) {
0d4ad91d 817 bool required_up = false;
852a3916 818 Link *l;
0d4ad91d
AR		 819
820 assert(link);
821
ad82f0c3
YW		 822 /* If at least one interface in bound_to_links has carrier, then make this interface up.
823 * If all interfaces in bound_to_links do not, then make this interface down. */
824
0d4ad91d
AR		 825 if (hashmap_isempty(link->bound_to_links))
826 return 0;
827
852a3916 828 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 829 if (link_has_carrier(l)) {
830 required_up = true;
831 break;
832 }
833
ec4f6467 834 if (!required_up && link_is_up(link))
93378148 835 return link_request_to_bring_up_or_down(link, /* up= */ false);
ec4f6467 836 if (required_up && !link_is_up(link))
93378148 837 return link_request_to_bring_up_or_down(link, /* up= */ true);
0d4ad91d
AR		 838
839 return 0;
840}
841
842static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 843 Link *l;
844 int r;
845
846 assert(link);
847
ad82f0c3
YW		 848 /* Update up or down state of interfaces which depend on this interface's carrier state. */
849
852a3916 850 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 851 r = link_handle_bound_to_list(l);
852 if (r < 0)
853 return r;
854 }
855
856 return 0;
857}
858
859static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
860 int r;
861
862 assert(link);
863 assert(carrier);
864
865 if (link == carrier)
866 return 0;
867
4b4eba16 868 if (hashmap_contains(*h, INT_TO_PTR(carrier->ifindex)))
0d4ad91d
AR		 869 return 0;
870
190b3b5c 871 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 872 if (r < 0)
873 return r;
874
9092113d
YW		 875 link_dirty(link);
876
0d4ad91d
AR		 877 return 0;
878}
879
880static int link_new_bound_by_list(Link *link) {
881 Manager *m;
882 Link *carrier;
0d4ad91d 883 int r;
0d4ad91d
AR		 884
885 assert(link);
886 assert(link->manager);
887
888 m = link->manager;
889
6eab614d 890 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 891 if (!carrier->network)
892 continue;
893
894 if (strv_isempty(carrier->network->bind_carrier))
895 continue;
896
191a3f16 897 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 898 r = link_put_carrier(link, carrier, &link->bound_by_links);
899 if (r < 0)
900 return r;
0d4ad91d
AR		 901 }
902 }
903
90e74a66 904 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 905 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
906 if (r < 0)
907 return r;
0d4ad91d
AR		 908 }
909
910 return 0;
911}
912
913static int link_new_bound_to_list(Link *link) {
914 Manager *m;
915 Link *carrier;
0d4ad91d 916 int r;
0d4ad91d
AR		 917
918 assert(link);
919 assert(link->manager);
920
921 if (!link->network)
922 return 0;
923
924 if (strv_isempty(link->network->bind_carrier))
925 return 0;
926
927 m = link->manager;
928
6eab614d 929 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 930 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 931 r = link_put_carrier(link, carrier, &link->bound_to_links);
932 if (r < 0)
933 return r;
0d4ad91d
AR		 934 }
935 }
936
852a3916 937 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 938 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
939 if (r < 0)
940 return r;
0d4ad91d
AR		 941 }
942
943 return 0;
944}
945
0d4ad91d 946static void link_free_bound_to_list(Link *link) {
9092113d 947 bool updated = false;
0d4ad91d 948 Link *bound_to;
0d4ad91d 949
9092113d
YW		 950 assert(link);
951
952 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
953 updated = true;
0d4ad91d
AR		 954
955 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 956 link_dirty(bound_to);
0d4ad91d
AR		 957 }
958
9092113d
YW		 959 if (updated)
960 link_dirty(link);
0d4ad91d
AR		 961}
962
963static void link_free_bound_by_list(Link *link) {
9092113d 964 bool updated = false;
0d4ad91d 965 Link *bound_by;
0d4ad91d 966
9092113d
YW		 967 assert(link);
968
969 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
970 updated = true;
0d4ad91d
AR		 971
972 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 973 link_dirty(bound_by);
0d4ad91d
AR		 974 link_handle_bound_to_list(bound_by);
975 }
976 }
977
9092113d
YW		 978 if (updated)
979 link_dirty(link);
0d4ad91d
AR		 980}
981
81357285 982static int link_append_to_master(Link *link) {
5f707e12
YW		 983 Link *master;
984 int r;
985
986 assert(link);
5f707e12 987
81357285
YW		 988 /* - The link may have no master.
989 * - RTM_NEWLINK message about master interface may not be received yet. */
990 if (link_get_master(link, &master) < 0)
991 return 0;
5f707e12 992
4cf443e6 993 r = set_ensure_put(&master->slaves, &link_hash_ops, link);
38288f0b 994 if (r <= 0)
5f707e12
YW		 995 return r;
996
997 link_ref(link);
998 return 0;
999}
1000
81357285 1001static void link_drop_from_master(Link *link) {
5f707e12
YW		 1002 Link *master;
1003
1004 assert(link);
1005
81357285 1006 if (!link->manager)
5f707e12
YW		 1007 return;
1008
81357285 1009 if (link_get_master(link, &master) < 0)
5f707e12
YW		 1010 return;
1011
1012 link_unref(set_remove(master->slaves, link));
1013}
1014
4303e980 1015static int link_drop_requests(Link *link) {
56001f02 1016 Request *req;
4303e980 1017 int ret = 0;
56001f02
YW		 1018
1019 assert(link);
1020 assert(link->manager);
1021
4303e980
YW		 1022 ORDERED_SET_FOREACH(req, link->manager->request_queue) {
1023 if (req->link != link)
1024 continue;
1025
1026 /* If the request is already called, but its reply is not received, then we need to
1027 * drop the configuration (e.g. address) here. Note, if the configuration is known,
dd6d53a8 1028 * it will be handled later by link_drop_unmanaged_addresses() or so. */
4303e980
YW		 1029 if (req->waiting_reply && link->state != LINK_STATE_LINGER)
1030 switch (req->type) {
1031 case REQUEST_TYPE_ADDRESS: {
1032 Address *address = ASSERT_PTR(req->userdata);
1033
1034 if (address_get(link, address, NULL) < 0)
1035 RET_GATHER(ret, address_remove(address, link));
1036 break;
1037 }
c902fa08
YW		 1038 case REQUEST_TYPE_NEIGHBOR: {
1039 Neighbor *neighbor = ASSERT_PTR(req->userdata);
1040
1041 if (neighbor_get(link, neighbor, NULL) < 0)
1042 RET_GATHER(ret, neighbor_remove(neighbor, link));
1043 break;
1044 }
9a988d16
YW		 1045 case REQUEST_TYPE_NEXTHOP: {
1046 NextHop *nexthop = ASSERT_PTR(req->userdata);
1047
1048 if (nexthop_get_by_id(link->manager, nexthop->id, NULL) < 0)
1049 RET_GATHER(ret, nexthop_remove(nexthop, link->manager));
1050 break;
1051 }
97979ece
YW		 1052 case REQUEST_TYPE_ROUTE: {
1053 Route *route = ASSERT_PTR(req->userdata);
1054
1055 if (route_get(link->manager, route, NULL) < 0)
1056 RET_GATHER(ret, route_remove(route, link->manager));
1057 break;
1058 }
4303e980
YW		 1059 default:
1060 ;
1061 }
1062
b9b5096e 1063 request_detach(req);
4303e980
YW		 1064 }
1065
1066 return ret;
56001f02
YW		 1067}
1068
cc2d7efc 1069static Link *link_drop(Link *link) {
63130eb3 1070 if (!link)
cc2d7efc 1071 return NULL;
0d4ad91d 1072
63130eb3
YW		 1073 assert(link->manager);
1074
a7fa29b1
LP		 1075 bool notify = link_has_local_lease_domain(link);
1076
0d4ad91d
AR		 1077 link_set_state(link, LINK_STATE_LINGER);
1078
63130eb3
YW		 1079 /* Drop all references from other links and manager. Note that async netlink calls may have
1080 * references to the link, and they will be dropped when we receive replies. */
1081
4303e980 1082 (void) link_drop_requests(link);
56001f02 1083
bb193d2d
YW		 1084 link_free_bound_to_list(link);
1085 link_free_bound_by_list(link);
0d4ad91d 1086
b0ff6dea
YW		 1087 link_clear_sr_iov_ifindices(link);
1088
81357285 1089 link_drop_from_master(link);
5f707e12 1090
4c78dc17
YW		 1091 if (link->state_file)
1092 (void) unlink(link->state_file);
1093
63130eb3
YW		 1094 link_clean(link);
1095
0b54c870
YW		 1096 STRV_FOREACH(n, link->alternative_names)
1097 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 1098 hashmap_remove(link->manager->links_by_name, link->ifname);
1099
fe321d45 1100 /* bonding master and its slaves have the same hardware address. */
e74f1d07 1101 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 1102
63130eb3 1103 /* The following must be called at last. */
6eab614d 1104 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
a7fa29b1
LP		 1105
1106 if (notify)
1107 manager_notify_hook_filters(link->manager);
1108
cc2d7efc 1109 return link_unref(link);
0d4ad91d
AR		 1110}
1111
dd6d53a8 1112static int link_drop_unmanaged_config(Link *link) {
1339b950 1113 int r;
0b81225e
YW		 1114
1115 assert(link);
dd6d53a8 1116 assert(link->state == LINK_STATE_CONFIGURING);
0b81225e 1117 assert(link->manager);
5e5b137a 1118
dd6d53a8
YW		 1119 r = link_drop_unmanaged_routes(link);
1120 RET_GATHER(r, link_drop_unmanaged_nexthops(link));
1121 RET_GATHER(r, link_drop_unmanaged_addresses(link));
1122 RET_GATHER(r, link_drop_unmanaged_neighbors(link));
1123 RET_GATHER(r, link_drop_unmanaged_routing_policy_rules(link));
0b81225e
YW		 1124
1125 return r;
5e5b137a
TG		 1126}
1127
dd6d53a8 1128static int link_drop_static_config(Link *link) {
1339b950 1129 int r;
0b81225e
YW		 1130
1131 assert(link);
1132 assert(link->manager);
3104883d 1133
e09b7588
YW		 1134 r = link_drop_static_routes(link);
1135 RET_GATHER(r, link_drop_static_nexthops(link));
1136 RET_GATHER(r, link_drop_static_addresses(link));
1137 RET_GATHER(r, link_drop_static_neighbors(link));
1138 RET_GATHER(r, link_drop_static_routing_policy_rules(link));
3104883d 1139
0b81225e 1140 return r;
3104883d
SS		 1141}
1142
451c2baf
YW		 1143static int link_drop_dynamic_config(Link *link, Network *network) {
1144 int r;
1145
1146 assert(link);
82df2e0f 1147 assert(link->network);
451c2baf
YW		 1148
1149 /* Drop unnecessary dynamic configurations gracefully, e.g. drop DHCP lease in the case that
1150 * previously DHCP=yes and now DHCP=no, but keep DHCP lease when DHCP setting is unchanged. */
1151
1152 r = link_drop_ndisc_config(link, network);
42152390
YW		 1153 RET_GATHER(r, link_drop_radv_config(link, network)); /* Stop before dropping DHCP-PD prefixes. */
1154 RET_GATHER(r, link_drop_ipv4ll_config(link, network)); /* Stop before DHCPv4 client. */
451c2baf
YW		 1155 RET_GATHER(r, link_drop_dhcp4_config(link, network));
1156 RET_GATHER(r, link_drop_dhcp6_config(link, network));
1157 RET_GATHER(r, link_drop_dhcp_pd_config(link, network));
451c2baf
YW		 1158 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
1159 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); /* TODO: keep the received neighbors. */
1160 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1161
52f46b77
YW		 1162 /* Even if we do not release DHCP lease or so, reset 'configured' flags. Otherwise, e.g. if
1163 * previously UseDNS= was disabled but is now enabled, link will enter configured state before
1164 * expected DNS servers being acquired. */
1165 link->ipv4ll_address_configured = false;
1166 link->dhcp4_configured = false;
1167 link->dhcp6_configured = false;
1168 link->dhcp_pd_configured = false;
1169 link->ndisc_configured = false;
1170
451c2baf
YW		 1171 return r;
1172}
1173
c3b94251 1174static int link_configure(Link *link) {
4ecdcb07
YW		 1175 int r;
1176
ef1ba606 1177 assert(link);
b22d8a00 1178 assert(link->network);
bd08ce56 1179 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1180
1187fc33
YW		 1181 link_set_state(link, LINK_STATE_CONFIGURING);
1182
ed3bab7a
YW		 1183 r = link_drop_unmanaged_config(link);
1184 if (r < 0)
1185 return r;
1186
3cf58ef3
YW		 1187 r = link_new_bound_to_list(link);
1188 if (r < 0)
1189 return r;
1190
1dec9d81 1191 r = link_request_traffic_control(link);
4ecdcb07
YW		 1192 if (r < 0)
1193 return r;
1194
941f8e13
YW		 1195 r = link_configure_mtu(link);
1196 if (r < 0)
1197 return r;
1198
7558f9e7
YW		 1199 if (link->iftype == ARPHRD_CAN) {
1200 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1201 r = link_request_to_set_can(link);
1202 if (r < 0)
1203 return r;
1204
1205 return link_request_to_activate(link);
1206 }
1207
cb8453cc 1208 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1209 if (r < 0)
1210 return r;
1211
5e0534f1 1212 r = link_set_sysctl(link);
b69c3180
SS		 1213 if (r < 0)
1214 return r;
8749cbcd 1215
93378148 1216 r = link_request_to_set_mac(link, /* allow_retry= */ true);
e16e4b3b
DS		 1217 if (r < 0)
1218 return r;
1219
72e65e6f
YW		 1220 r = link_request_to_set_ipoib(link);
1221 if (r < 0)
1222 return r;
1223
1187fc33 1224 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1225 if (r < 0)
1226 return r;
1227
1187fc33 1228 r = link_request_to_set_group(link);
99d2baa2
SS		 1229 if (r < 0)
1230 return r;
1231
1187fc33
YW		 1232 r = link_request_to_set_addrgen_mode(link);
1233 if (r < 0)
1234 return r;
1235
1236 r = link_request_to_set_master(link);
1237 if (r < 0)
1238 return r;
1239
b8b0c1a0 1240 r = link_request_stacked_netdevs(link, _NETDEV_LOCAL_ADDRESS_TYPE_INVALID);
1187fc33
YW		 1241 if (r < 0)
1242 return r;
1243
1244 r = link_request_to_set_bond(link);
1245 if (r < 0)
1246 return r;
1247
1248 r = link_request_to_set_bridge(link);
1249 if (r < 0)
1250 return r;
1251
1252 r = link_request_to_set_bridge_vlan(link);
1253 if (r < 0)
1254 return r;
1255
1256 r = link_request_to_activate(link);
89fe6535
SS		 1257 if (r < 0)
1258 return r;
1259
2ffd6d73
YW		 1260 r = ipv4ll_configure(link);
1261 if (r < 0)
1262 return r;
64b21ece 1263
ccffa166 1264 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1265 if (r < 0)
1266 return r;
eb34d4af 1267
ccffa166 1268 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1269 if (r < 0)
1270 return r;
f5a8c43f 1271
ba4c7184 1272 r = link_request_ndisc(link);
2ffd6d73
YW		 1273 if (r < 0)
1274 return r;
4138fb2c 1275
1d28a3cf
YW		 1276 r = link_request_dhcp_server(link);
1277 if (r < 0)
1278 return r;
1279
a254fab2 1280 r = link_request_radv(link);
086b8853
YW		 1281 if (r < 0)
1282 return r;
7465dd22 1283
2ffd6d73
YW		 1284 r = link_lldp_rx_configure(link);
1285 if (r < 0)
1286 return r;
ce43e484 1287
c01b9b87
YW		 1288 r = link_lldp_tx_configure(link);
1289 if (r < 0)
1290 return r;
1291
1187fc33
YW		 1292 r = link_request_static_configs(link);
1293 if (r < 0)
1294 return r;
1295
f8a4c3d3
OA		 1296 r = link_modem_reconfigure(link);
1297 if (r < 0)
1298 return r;
1299
1187fc33
YW		 1300 if (!link_has_carrier(link))
1301 return 0;
1302
1303 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1304}
1305
170e88c8
YW		 1306static int link_get_network(Link *link, Network **ret) {
1307 Network *network;
1a3caa49 1308 int r;
170e88c8
YW		 1309
1310 assert(link);
1311 assert(link->manager);
1312 assert(ret);
1313
1314 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1315 bool warn = false;
1316
1a3caa49 1317 r = net_match_config(
170e88c8 1318 &network->match,
8de56fb3 1319 link->dev,
52135071
YW		 1320 &link->hw_addr,
1321 &link->permanent_hw_addr,
170e88c8
YW		 1322 link->driver,
1323 link->iftype,
65022cd7 1324 link->kind,
170e88c8
YW		 1325 link->ifname,
1326 link->alternative_names,
1327 link->wlan_iftype,
1328 link->ssid,
1a3caa49
YW		 1329 &link->bssid);
1330 if (r < 0)
1331 return r;
1332 if (r == 0)
170e88c8
YW		 1333 continue;
1334
8de56fb3 1335 if (network->match.ifname && link->dev) {
170e88c8
YW		 1336 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1337 const char *attr;
1338
8de56fb3 1339 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1340 (void) safe_atou8(attr, &name_assign_type);
1341
1342 warn = name_assign_type == NET_NAME_ENUM;
1343 }
1344
1345 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
5872ea70
YW		 1346 "Found matching .network file%s: %s",
1347 warn ? ", based on potentially unpredictable interface name" : "",
1348 network->filename);
170e88c8
YW		 1349
1350 if (network->unmanaged)
1351 return -ENOENT;
1352
1353 *ret = network;
1354 return 0;
1355 }
1356
5872ea70 1357 return log_link_debug_errno(link, SYNTHETIC_ERRNO(ENOENT), "No matching .network found.");
170e88c8
YW		 1358}
1359
5a1ef6df
YW		 1360static void link_enter_unmanaged(Link *link) {
1361 assert(link);
1362
1363 if (link->state == LINK_STATE_UNMANAGED)
1364 return;
1365
a7fa29b1
LP		 1366 bool notify = link_has_local_lease_domain(link);
1367
5a1ef6df
YW		 1368 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1369 "Unmanaging interface.");
1370
93378148 1371 (void) link_stop_engines(link, /* may_keep_dynamic= */ false);
5a1ef6df 1372 (void) link_drop_requests(link);
dd6d53a8 1373 (void) link_drop_static_config(link);
5a1ef6df
YW		 1374
1375 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1376 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1377 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1378 * map here, as it depends on .network files assigned to other links. */
1379 link_free_bound_to_list(link);
1380 link_free_engines(link);
1381
1382 link->network = network_unref(link->network);
1383 link_set_state(link, LINK_STATE_UNMANAGED);
a7fa29b1
LP		 1384
1385 if (notify)
1386 manager_notify_hook_filters(link->manager);
5a1ef6df
YW		 1387}
1388
78f8d5ed
YW		 1389static int link_managed_by_us(Link *link) {
1390 int r;
1391
1392 assert(link);
1393
1394 if (!link->dev)
1395 return true;
1396
1397 const char *s;
1398 r = sd_device_get_property_value(link->dev, "ID_NET_MANAGED_BY", &s);
1399 if (r == -ENOENT)
1400 return true;
1401 if (r < 0)
1402 return log_link_warning_errno(link, r, "Failed to get ID_NET_MANAGED_BY udev property: %m");
1403
1404 if (streq(s, "io.systemd.Network"))
1405 return true;
1406
1407 if (link->state == LINK_STATE_UNMANAGED)
1408 return false; /* Already in unmanaged state */
1409
1410 log_link_debug(link, "Interface is requested to be managed by '%s', unmanaging the interface.", s);
1411 link_set_state(link, LINK_STATE_UNMANAGED);
1412 return false;
1413}
1414
2b07a321 1415int link_reconfigure_impl(Link *link, LinkReconfigurationFlag flags) {
cb71e9c6 1416 Network *network = NULL;
ad932b15
YW		 1417 int r;
1418
5a1860f7 1419 assert(link);
db68e990 1420 assert(link->manager);
572b21d9 1421
1788c346
YW		 1422 link_assign_netdev(link);
1423
db68e990
YW		 1424 if (link->manager->state != MANAGER_RUNNING)
1425 return 0;
1426
4faca0a3 1427 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1428 return 0;
1429
78f8d5ed
YW		 1430 r = link_managed_by_us(link);
1431 if (r <= 0)
1432 return r;
1433
170e88c8 1434 r = link_get_network(link, &network);
5a1ef6df
YW		 1435 if (r == -ENOENT) {
1436 link_enter_unmanaged(link);
1437 return 0;
1438 }
1439 if (r < 0)
ad932b15
YW		 1440 return r;
1441
2b07a321 1442 if (link->network == network && !FLAGS_SET(flags, LINK_RECONFIGURE_UNCONDITIONALLY))
ad932b15
YW		 1443 return 0;
1444
5a1ef6df
YW		 1445 _cleanup_free_ char *joined = strv_join(network->dropins, ", ");
1446 if (link->network)
1447 log_link_info(link, "Reconfiguring with %s%s%s%s.",
1448 network->filename,
1449 isempty(joined) ? "" : " (dropins: ",
1450 joined,
1451 isempty(joined) ? "" : ")");
1452 else
1453 log_link_info(link, "Configuring with %s%s%s%s.",
1454 network->filename,
1455 isempty(joined) ? "" : " (dropins: ",
1456 joined,
1457 isempty(joined) ? "" : ")");
ad932b15 1458
82df2e0f 1459 /* Dropping configurations based on the old .network file. */
451c2baf
YW		 1460 r = link_drop_requests(link);
1461 if (r < 0)
1462 return r;
1463
3cf58ef3
YW		 1464 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1465 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1466 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1467 * map here, as it depends on .network files assigned to other links. */
1468 link_free_bound_to_list(link);
1469
82df2e0f 1470 _cleanup_(network_unrefp) Network *old_network = TAKE_PTR(link->network);
ad932b15
YW		 1471
1472 /* Then, apply new .network file */
9092113d 1473 link->network = network_ref(network);
82df2e0f 1474
80a89d1a 1475 if (FLAGS_SET(network->keep_configuration, KEEP_CONFIGURATION_DYNAMIC) ||
82df2e0f
YW		 1476 !FLAGS_SET(flags, LINK_RECONFIGURE_CLEANLY)) {
1477 /* To make 'networkctl reconfigure INTERFACE' work safely for an interface whose new .network
80a89d1a 1478 * file has KeepConfiguration=dynamic or yes, even if a clean reconfiguration is requested,
82df2e0f
YW		 1479 * drop only unnecessary or possibly being changed dynamic configurations here. */
1480 r = link_drop_dynamic_config(link, old_network);
1481 if (r < 0)
1482 return r;
1483 } else {
1484 /* Otherwise, stop DHCP client and friends unconditionally, and drop all dynamic
1485 * configurations like DHCP address and routes. */
93378148 1486 r = link_stop_engines(link, /* may_keep_dynamic= */ false);
82df2e0f
YW		 1487 if (r < 0)
1488 return r;
1489
1490 /* Free DHCP client and friends. */
1491 link_free_engines(link);
1492 }
1493
b156a95d 1494 link_update_operstate(link, true);
9092113d 1495 link_dirty(link);
ad932b15 1496
ad932b15 1497 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1498 link->activated = false;
ad932b15 1499
ad932b15
YW		 1500 r = link_configure(link);
1501 if (r < 0)
1502 return r;
1503
0e397560 1504 return 1;
ad932b15
YW		 1505}
1506
2b07a321 1507typedef struct LinkReconfigurationData {
9ad294ef 1508 Manager *manager;
1e869a5d 1509 Link *link;
2b07a321 1510 LinkReconfigurationFlag flags;
1e869a5d 1511 sd_bus_message *message;
2b07a321
YW		 1512 unsigned *counter;
1513} LinkReconfigurationData;
1e869a5d 1514
2b07a321 1515static LinkReconfigurationData* link_reconfiguration_data_free(LinkReconfigurationData *data) {
ebf66d0c
YW		 1516 if (!data)
1517 return NULL;
1518
1519 link_unref(data->link);
1520 sd_bus_message_unref(data->message);
1521
1522 return mfree(data);
1523}
1524
2b07a321 1525DEFINE_TRIVIAL_CLEANUP_FUNC(LinkReconfigurationData*, link_reconfiguration_data_free);
ebf66d0c 1526
2b07a321 1527static void link_reconfiguration_data_destroy_callback(LinkReconfigurationData *data) {
1e869a5d
YW		 1528 int r;
1529
1530 assert(data);
1e869a5d 1531
2b07a321
YW		 1532 if (data->message) {
1533 if (data->counter) {
1534 assert(*data->counter > 0);
1535 (*data->counter)--;
1536 }
1537
1538 if (!data->counter || *data->counter <= 0) {
9ad294ef
YW		 1539 /* Update the state files before replying the bus method. Otherwise,
1540 * systemd-networkd-wait-online following networkctl reload/reconfigure may read an
1541 * outdated state file and wrongly handle an interface is already in the configured
1542 * state. */
1543 (void) manager_clean_all(data->manager);
1544
2b07a321
YW		 1545 r = sd_bus_reply_method_return(data->message, NULL);
1546 if (r < 0)
1547 log_warning_errno(r, "Failed to reply for DBus method, ignoring: %m");
1548 }
1e869a5d
YW		 1549 }
1550
2b07a321 1551 link_reconfiguration_data_free(data);
1e869a5d
YW		 1552}
1553
2b07a321
YW		 1554static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, LinkReconfigurationData *data) {
1555 Link *link = ASSERT_PTR(ASSERT_PTR(data)->link);
1556 int r;
1557
1558 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1559 if (r <= 0)
1560 return r;
1561
1562 r = link_reconfigure_impl(link, data->flags);
1563 if (r < 0) {
1564 link_enter_failed(link);
1565 return 0;
1566 }
1567
1568 return r;
1e869a5d
YW		 1569}
1570
2b07a321 1571int link_reconfigure_full(Link *link, LinkReconfigurationFlag flags, sd_bus_message *message, unsigned *counter) {
1e869a5d 1572 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2b07a321 1573 _cleanup_(link_reconfiguration_data_freep) LinkReconfigurationData *data = NULL;
1e869a5d
YW		 1574 int r;
1575
1576 assert(link);
1577 assert(link->manager);
1578 assert(link->manager->rtnl);
1e869a5d 1579
2b07a321
YW		 1580 /* When the link is in the pending or initialized state, link_reconfigure_impl() will be called later
1581 * by link_initialized() or link_initialized_and_synced(). To prevent the function from being called
1582 * multiple times simultaneously, let's refuse to reconfigure the interface here in such cases. */
1e869a5d 1583 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
2b07a321 1584 return 0; /* 0 means no-op. */
1e869a5d 1585
2b07a321 1586 data = new(LinkReconfigurationData, 1);
021d39d3
YW		 1587 if (!data) {
1588 r = -ENOMEM;
1589 goto failed;
1590 }
1e869a5d 1591
2b07a321 1592 *data = (LinkReconfigurationData) {
9ad294ef 1593 .manager = link->manager,
1e869a5d 1594 .link = link_ref(link),
2b07a321
YW		 1595 .flags = flags,
1596 .message = sd_bus_message_ref(message), /* message may be NULL, but _ref() works fine. */
1597 .counter = counter,
1e869a5d
YW		 1598 };
1599
ebf66d0c
YW		 1600 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
1601 if (r < 0)
021d39d3 1602 goto failed;
ebf66d0c
YW		 1603
1604 r = netlink_call_async(link->manager->rtnl, NULL, req,
2b07a321
YW		 1605 link_reconfigure_handler,
1606 link_reconfiguration_data_destroy_callback, data);
ebf66d0c 1607 if (r < 0)
021d39d3 1608 goto failed;
1e869a5d
YW		 1609
1610 TAKE_PTR(data);
2b07a321
YW		 1611 if (counter)
1612 (*counter)++;
ebf66d0c 1613
685fd0d7
YW		 1614 if (link->state == LINK_STATE_FAILED)
1615 link_set_state(link, LINK_STATE_INITIALIZED);
1616
2b07a321 1617 return 1; /* 1 means the interface will be reconfigured, and bus method will be replied later. */
021d39d3
YW		 1618
1619failed:
1620 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
1621 link_enter_failed(link);
1622 return r;
1e869a5d
YW		 1623}
1624
e6bf7774 1625static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1626 int r;
1627
1628 assert(link);
505f8da7
TG		 1629 assert(link->manager);
1630
40695457
YW		 1631 if (link->state == LINK_STATE_PENDING) {
1632 log_link_debug(link, "Link state is up-to-date");
1633 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1634
40695457
YW		 1635 r = link_new_bound_by_list(link);
1636 if (r < 0)
1637 return r;
0d4ad91d 1638
40695457
YW		 1639 r = link_handle_bound_by_list(link);
1640 if (r < 0)
1641 return r;
1642 }
0d4ad91d 1643
93378148 1644 return link_reconfigure_impl(link, /* flags= */ 0);
505f8da7
TG		 1645}
1646
302a796f 1647static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1648 int r;
1649
5a1860f7
YW		 1650 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1651 if (r <= 0)
0b54c870 1652 return r;
572b21d9 1653
4ff296b0
YW		 1654 r = link_initialized_and_synced(link);
1655 if (r < 0)
1656 link_enter_failed(link);
5a1860f7
YW		 1657
1658 return 0;
e6bf7774
YW		 1659}
1660
3be9d62a 1661static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1662 int r;
1663
4f561e8e 1664 assert(link);
4f561e8e
TG		 1665 assert(device);
1666
160203e9
YW		 1667 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1668 * or sysattrs) may be outdated. */
8de56fb3 1669 device_unref_and_replace(link->dev, device);
4f561e8e 1670
78f8d5ed
YW		 1671 r = link_managed_by_us(link);
1672 if (r <= 0)
1673 return r;
1674
3b1dbdf0
YW		 1675 if (link->dhcp_client) {
1676 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1677 if (r < 0)
1678 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1679 }
1680
1681 if (link->dhcp6_client) {
1682 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1683 if (r < 0)
1684 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1685 }
1686
b0ff6dea
YW		 1687 r = link_set_sr_iov_ifindices(link);
1688 if (r < 0)
1689 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1690
40695457 1691 if (link->state != LINK_STATE_PENDING)
93378148 1692 return link_reconfigure(link, /* flags= */ 0);
679b3605 1693
79008bdd 1694 log_link_debug(link, "udev initialized link");
4f561e8e 1695
3c9b8860
TG		 1696 /* udev has initialized the link, but we don't know if we have yet
1697 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1698 * when it returns we know that the pending NEWLINKs have already been
1699 * processed and that we are up-to-date */
4f561e8e 1700
5a1860f7 1701 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1702}
1703
9c402e3a 1704int link_check_initialized(Link *link) {
51517f9e 1705 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1706 int r;
505f8da7 1707
0d411b7f 1708 assert(link);
505f8da7 1709
82f52245 1710 if (!udev_available())
0d411b7f 1711 return link_initialized_and_synced(link);
852a3916
YW		 1712
1713 /* udev should be around */
0ac655a6 1714 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1715 if (r < 0) {
1716 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1717 return 0;
1718 }
1719
3df2b455 1720 r = device_is_processed(device);
0d411b7f 1721 if (r < 0)
3df2b455 1722 return log_link_warning_errno(link, r, "Could not determine whether the device is processed by udevd: %m");
852a3916
YW		 1723 if (r == 0) {
1724 /* not yet ready */
1725 log_link_debug(link, "link pending udev initialization...");
1726 return 0;
1727 }
1728
1729 r = device_is_renaming(device);
0d411b7f
YW		 1730 if (r < 0)
1731 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1732 if (r > 0) {
1733 log_link_debug(link, "Interface is being renamed, pending initialization.");
1734 return 0;
4f561e8e 1735 }
505f8da7 1736
0d411b7f 1737 return link_initialized(link, device);
a748b692
TG		 1738}
1739
1fd3ac1e 1740int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1741 int r, ifindex;
1fd3ac1e 1742 Link *link;
3be9d62a
YW		 1743
1744 assert(m);
1745 assert(device);
1746
3be9d62a 1747 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1748 if (r < 0)
1749 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1750
75255a8d
YW		 1751 r = link_get_by_index(m, ifindex, &link);
1752 if (r < 0) {
1753 /* This error is not critical, as the corresponding rtnl message may be received later. */
1754 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1755 return 0;
1756 }
1757
1758 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1759 * object here. It will be removed only when rtnetlink says so. */
1760 if (action == SD_DEVICE_REMOVE) {
1761 link->dev = sd_device_unref(link->dev);
1762 return 0;
1763 }
1764
3be9d62a 1765 r = device_is_renaming(device);
1fd3ac1e
YW		 1766 if (r < 0)
1767 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1768 if (r > 0) {
1fd3ac1e 1769 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1770 /* TODO:
1771 * What happens when a device is initialized, then soon renamed after that? When we detect
1772 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1773 return 0;
1774 }
1775
4b9a8c2b
YW		 1776 r = link_initialized(link, device);
1777 if (r < 0)
1778 link_enter_failed(link);
3be9d62a
YW		 1779
1780 return 0;
1781}
1782
9c0a72f9 1783static int link_carrier_gained(Link *link) {
2b07a321 1784 LinkReconfigurationFlag flags = 0;
9c0a72f9
TG		 1785 int r;
1786
1787 assert(link);
1788
07021ed4
YW		 1789 log_link_info(link, "Gained carrier");
1790
6706ce2f
YW		 1791 r = event_source_disable(link->carrier_lost_timer);
1792 if (r < 0)
1793 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1794
36b8ad08
YW		 1795 /* Process BindCarrier= setting specified by other interfaces. This is independent of the .network
1796 * file assigned to this interface, but depends on .network files assigned to other interfaces.
1797 * Hence, this can and should be called earlier. */
1798 r = link_handle_bound_by_list(link);
1799 if (r < 0)
1800 return r;
1801
d9910948
YW		 1802 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1803 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1804 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1805 * restarted, and the correct network information will be gained.
1806 *
1807 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1808 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1809 * already assigned to the interface (in that case, the .network file does not have the SSID=
1810 * setting in the [Match] section), and the interface is already being configured. Of course,
1811 * there may exist another .network file with higher priority and a matching SSID= setting. But
2b07a321 1812 * in that case, link_reconfigure_impl() can handle that without any flags.
d9910948 1813 *
6706ce2f 1814 * For non-wireless interfaces, we have no way to detect the connected network change. So,
2b07a321
YW		 1815 * we do not set any flags here. Note, both ssid and previous_ssid are NULL in that case. */
1816 if (link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid))
6e0c9b7d 1817 flags |= LINK_RECONFIGURE_UNCONDITIONALLY | LINK_RECONFIGURE_CLEANLY;
6706ce2f
YW		 1818 link->previous_ssid = mfree(link->previous_ssid);
1819
986b2514
AŠ		 1820 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1821 * profile wants to match on it with SSID= in its [Match] section.
1822 */
1823 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1824 r = link_get_wlan_interface(link);
1825 if (r < 0)
1826 return r;
1827 }
1828
081466bd
YW		 1829 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1830 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1831 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
2b07a321 1832 r = link_reconfigure_impl(link, flags);
081466bd
YW		 1833 if (r != 0)
1834 return r;
b7ac1284 1835
600b7898
YW		 1836 if (link->iftype == ARPHRD_CAN)
1837 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1838 return 0;
600b7898 1839
b9ea3d2e 1840 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1841 r = link_acquire_dynamic_conf(link);
f0269653 1842 if (r < 0)
9c0a72f9 1843 return r;
6fc25497 1844
97108953 1845 r = link_request_static_configs(link);
6fc25497
SS		 1846 if (r < 0)
1847 return r;
9c0a72f9
TG		 1848 }
1849
aa9117c0 1850 return 0;
9c0a72f9
TG		 1851}
1852
6706ce2f 1853static int link_carrier_lost_impl(Link *link) {
e8eaed02 1854 int ret = 0;
6706ce2f
YW		 1855
1856 assert(link);
1857
1858 link->previous_ssid = mfree(link->previous_ssid);
1859
e8eaed02
YW		 1860 ret = link_handle_bound_by_list(link);
1861
6706ce2f 1862 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
e8eaed02 1863 return ret;
6706ce2f
YW		 1864
1865 if (!link->network)
e8eaed02 1866 return ret;
6706ce2f 1867
93378148 1868 RET_GATHER(ret, link_stop_engines(link, /* may_keep_dynamic= */ false));
dd6d53a8 1869 RET_GATHER(ret, link_drop_static_config(link));
6706ce2f
YW		 1870
1871 return ret;
1872}
1873
1874static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1875 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1876 int r;
1877
6706ce2f
YW		 1878 r = link_carrier_lost_impl(link);
1879 if (r < 0) {
1880 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1881 link_enter_failed(link);
1882 }
1883
1884 return 0;
1885}
1886
9c0a72f9 1887static int link_carrier_lost(Link *link) {
b7326069
YW		 1888 uint16_t dhcp_mtu;
1889 usec_t usec;
9c0a72f9
TG		 1890
1891 assert(link);
1892
07021ed4
YW		 1893 log_link_info(link, "Lost carrier");
1894
600b7898
YW		 1895 if (link->iftype == ARPHRD_CAN)
1896 /* let's shortcut things for CAN which doesn't need most of what's done below. */
e8eaed02 1897 usec = 0;
aa9117c0 1898
e8eaed02
YW		 1899 else if (!link->network)
1900 usec = 0;
f1c22cf4 1901
e8eaed02 1902 else if (link->network->ignore_carrier_loss_set)
b7326069
YW		 1903 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1904 usec = link->network->ignore_carrier_loss_usec;
1905
1906 else if (link->network->bond && link->wlan_iftype > 0)
1907 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1908 * carrier to be lost. See #19832. */
1909 usec = 3 * USEC_PER_SEC;
1910
1911 else if (link->network->dhcp_use_mtu &&
1912 link->dhcp_lease &&
1913 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1914 dhcp_mtu != link->original_mtu)
1915 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1916 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1917 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1918 usec = 5 * USEC_PER_SEC;
1919
1920 else
27438545 1921 /* Otherwise, use the implied default value. */
b7326069
YW		 1922 usec = link->network->ignore_carrier_loss_usec;
1923
1924 if (usec == USEC_INFINITY)
aa9117c0 1925 return 0;
600b7898 1926
b7326069 1927 if (usec == 0)
6706ce2f
YW		 1928 return link_carrier_lost_impl(link);
1929
1930 return event_reset_time_relative(link->manager->event,
1931 &link->carrier_lost_timer,
ba4e0427 1932 CLOCK_BOOTTIME,
b7326069 1933 usec,
6706ce2f
YW		 1934 0,
1935 link_carrier_lost_handler,
1936 link,
1937 0,
1938 "link-carrier-loss",
1939 true);
0c9ee5d5
YW		 1940}
1941
0c9ee5d5 1942static int link_admin_state_up(Link *link) {
0c9ee5d5
YW		 1943 assert(link);
1944
1945 /* This is called every time an interface admin state changes to up;
1946 * specifically, when IFF_UP flag changes from unset to set. */
1947
07021ed4
YW		 1948 log_link_info(link, "Link UP");
1949
0c9ee5d5
YW		 1950 if (!link->network)
1951 return 0;
1952
899b0e5e 1953 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1954 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
93378148 1955 return link_request_to_bring_up_or_down(link, /* up= */ false);
0c9ee5d5
YW		 1956 }
1957
1958 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1959 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
7edfbf41 1960 (void) link_set_ipv6_mtu(link, LOG_INFO);
0c9ee5d5
YW		 1961
1962 return 0;
1963}
1964
1965static int link_admin_state_down(Link *link) {
1966 assert(link);
1967
07021ed4
YW		 1968 log_link_info(link, "Link DOWN");
1969
688f1669 1970 link_forget_nexthops(link);
6954c38c
YW		 1971 link_forget_routes(link);
1972
0c9ee5d5
YW		 1973 if (!link->network)
1974 return 0;
1975
899b0e5e 1976 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1977 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
93378148 1978 return link_request_to_bring_up_or_down(link, /* up= */ true);
0c9ee5d5
YW		 1979 }
1980
1981 return 0;
1982}
1983
0c9ee5d5
YW		 1984static bool link_is_enslaved(Link *link) {
1985 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1986 return true;
1987
1f024462 1988 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1989 return true;
1990
0c9ee5d5
YW		 1991 return false;
1992}
1993
0c9ee5d5
YW		 1994void link_update_operstate(Link *link, bool also_update_master) {
1995 LinkOperationalState operstate;
1996 LinkCarrierState carrier_state;
1997 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1998 LinkOnlineState online_state;
1999 _cleanup_strv_free_ char **p = NULL;
0c9ee5d5 2000 bool changed = false;
0c9ee5d5
YW		 2001
2002 assert(link);
2003
2004 if (link->kernel_operstate == IF_OPER_DORMANT)
2005 carrier_state = LINK_CARRIER_STATE_DORMANT;
2006 else if (link_has_carrier(link)) {
2007 if (link_is_enslaved(link))
2008 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
2009 else
2010 carrier_state = LINK_CARRIER_STATE_CARRIER;
ec4f6467 2011 } else if (link_is_up(link))
0c9ee5d5
YW		 2012 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
2013 else
2014 carrier_state = LINK_CARRIER_STATE_OFF;
2015
2016 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
2017 Link *slave;
2018
2019 SET_FOREACH(slave, link->slaves) {
2020 link_update_operstate(slave, false);
2021
2022 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
2023 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
2024 }
2025 }
2026
60415c13 2027 link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state);
0c9ee5d5
YW		 2028
2029 /* Mapping of address and carrier state vs operational state
2030 * carrier state
2031 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
2032 * ------------------------------------------------------------------------------
2033 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 2034 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
2035 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 2036 */
2037
cf4dbd84
HH		 2038 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
2039 operstate = LINK_OPERSTATE_ROUTABLE;
2040 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
2041 operstate = LINK_OPERSTATE_DEGRADED;
2042 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 2043 operstate = (LinkOperationalState) carrier_state;
2044 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
2045 operstate = LINK_OPERSTATE_ROUTABLE;
2046 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
2047 operstate = LINK_OPERSTATE_DEGRADED;
2048 else
2049 operstate = LINK_OPERSTATE_ENSLAVED;
2050
2278d9f6
YW		 2051 LinkOperationalStateRange req;
2052 link_required_operstate_for_online(link, &req);
2053
0c9ee5d5
YW		 2054 /* Only determine online state for managed links with RequiredForOnline=yes */
2055 if (!link->network || !link->network->required_for_online)
2056 online_state = _LINK_ONLINE_STATE_INVALID;
2278d9f6
YW		 2057
2058 else if (!operational_state_is_in_range(operstate, &req))
0c9ee5d5 2059 online_state = LINK_ONLINE_STATE_OFFLINE;
2278d9f6 2060
0c9ee5d5 2061 else {
a853cc99 2062 AddressFamily required_family = link_required_family_for_online(link);
0c9ee5d5
YW		 2063 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
2064 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
2065
2066 /* The operational state is within the range required for online.
2067 * If a particular address family is also required, we might revert
2068 * to offline in the blocks below. */
2069 online_state = LINK_ONLINE_STATE_ONLINE;
2070
2278d9f6 2071 if (req.min >= LINK_OPERSTATE_DEGRADED) {
0c9ee5d5
YW		 2072 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
2073 online_state = LINK_ONLINE_STATE_OFFLINE;
2074 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
2075 online_state = LINK_ONLINE_STATE_OFFLINE;
2076 }
2077
2278d9f6 2078 if (req.min >= LINK_OPERSTATE_ROUTABLE) {
0c9ee5d5
YW		 2079 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2080 online_state = LINK_ONLINE_STATE_OFFLINE;
2081 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
2082 online_state = LINK_ONLINE_STATE_OFFLINE;
2083 }
2084 }
2085
2086 if (link->carrier_state != carrier_state) {
2087 link->carrier_state = carrier_state;
2088 changed = true;
2089 if (strv_extend(&p, "CarrierState") < 0)
2090 log_oom();
2091 }
2092
2093 if (link->address_state != address_state) {
2094 link->address_state = address_state;
2095 changed = true;
2096 if (strv_extend(&p, "AddressState") < 0)
2097 log_oom();
2098 }
0d4ad91d 2099
0c9ee5d5
YW		 2100 if (link->ipv4_address_state != ipv4_address_state) {
2101 link->ipv4_address_state = ipv4_address_state;
2102 changed = true;
2103 if (strv_extend(&p, "IPv4AddressState") < 0)
2104 log_oom();
2105 }
9c0a72f9 2106
0c9ee5d5
YW		 2107 if (link->ipv6_address_state != ipv6_address_state) {
2108 link->ipv6_address_state = ipv6_address_state;
2109 changed = true;
2110 if (strv_extend(&p, "IPv6AddressState") < 0)
2111 log_oom();
2112 }
9c0a72f9 2113
0c9ee5d5
YW		 2114 if (link->operstate != operstate) {
2115 link->operstate = operstate;
2116 changed = true;
2117 if (strv_extend(&p, "OperationalState") < 0)
2118 log_oom();
2119 }
9c0a72f9 2120
0c9ee5d5
YW		 2121 if (link->online_state != online_state) {
2122 link->online_state = online_state;
2123 changed = true;
2124 if (strv_extend(&p, "OnlineState") < 0)
2125 log_oom();
2126 }
9c0a72f9 2127
0c9ee5d5
YW		 2128 if (p)
2129 link_send_changed_strv(link, p);
2130 if (changed)
2131 link_dirty(link);
9c0a72f9 2132
0c9ee5d5
YW		 2133 if (also_update_master) {
2134 Link *master;
9c0a72f9 2135
0c9ee5d5
YW		 2136 if (link_get_master(link, &master) >= 0)
2137 link_update_operstate(master, true);
2138 }
9c0a72f9
TG		 2139}
2140
baa3fadf
DDM		 2141bool link_has_carrier(Link *link) {
2142 assert(link);
2143 return netif_has_carrier(link->kernel_operstate, link->flags);
2144}
2145
ec4f6467
YW		 2146bool link_is_up(Link *link) {
2147 assert(link);
2148 return FLAGS_SET(link->flags, IFF_UP);
2149}
2150
291b6fee
YW		 2151bool link_multicast_enabled(Link *link) {
2152 assert(link);
2153
2154 /* If Multicast= is specified, use the value. */
2155 if (link->network && link->network->multicast >= 0)
2156 return link->network->multicast;
2157
2158 /* Otherwise, return the current state. */
2159 return FLAGS_SET(link->flags, IFF_MULTICAST);
2160}
2161
0c9ee5d5
YW		 2162#define FLAG_STRING(string, flag, old, new) \
2163 (((old ^ new) & flag) \
2164 ? ((old & flag) ? (" -" string) : (" +" string)) \
2165 : "")
2166
0d411b7f 2167static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 2168 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 2169 uint8_t operstate;
2170 unsigned flags;
d236718c
DS		 2171 int r;
2172
61135582 2173 assert(link);
0d411b7f 2174 assert(message);
61135582 2175
0d411b7f 2176 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 2177 if (r < 0)
0d411b7f 2178 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 2179
0d411b7f
YW		 2180 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
2181 if (r == -ENODATA)
2182 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 2183 operstate = link->kernel_operstate;
0d411b7f
YW		 2184 else if (r < 0)
2185 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 2186
0d411b7f 2187 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 2188 return 0;
2189
0c9ee5d5
YW		 2190 if (link->flags != flags) {
2191 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 2192
0c9ee5d5
YW		 2193 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",
2194 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
2195 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
2196 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
2197 FLAG_STRING("UP", IFF_UP, link->flags, flags),
2198 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
2199 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
2200 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
2201 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
2202 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
2203 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
2204 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
2205 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
2206 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
2207 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
2208 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
2209 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
2210 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
2211 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
2212 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 2213
0c9ee5d5
YW		 2214 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
2215 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
2216 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
2217 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
2218 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
2219 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
2220 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
2221 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 2222
0c9ee5d5
YW		 2223 if (unknown_flags_added)
2224 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 2225
0c9ee5d5
YW		 2226 if (unknown_flags_removed)
2227 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
2228 }
61135582 2229
ec4f6467 2230 link_was_admin_up = link_is_up(link);
0d411b7f
YW		 2231 had_carrier = link_has_carrier(link);
2232
0c9ee5d5
YW		 2233 link->flags = flags;
2234 link->kernel_operstate = operstate;
36161cba 2235
0c9ee5d5 2236 link_update_operstate(link, true);
61135582 2237
07021ed4 2238 r = 0;
22936833 2239
ec4f6467 2240 if (!link_was_admin_up && link_is_up(link))
0d411b7f 2241 r = link_admin_state_up(link);
ec4f6467 2242 else if (link_was_admin_up && !link_is_up(link))
0d411b7f 2243 r = link_admin_state_down(link);
07021ed4
YW		 2244 if (r < 0)
2245 return r;
0d4ad91d 2246
07021ed4 2247 if (!had_carrier && link_has_carrier(link))
0d411b7f 2248 r = link_carrier_gained(link);
07021ed4 2249 else if (had_carrier && !link_has_carrier(link))
3f9db926 2250 r = link_carrier_lost(link);
07021ed4
YW		 2251 if (r < 0)
2252 return r;
b8941f74 2253
0d411b7f
YW		 2254 return 0;
2255}
afe7fd56 2256
0d411b7f
YW		 2257static int link_update_master(Link *link, sd_netlink_message *message) {
2258 int master_ifindex, r;
7465dd22 2259
0d411b7f
YW		 2260 assert(link);
2261 assert(message);
69629de9 2262
0d411b7f
YW		 2263 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2264 if (r == -ENODATA)
f44b20b7
YW		 2265 master_ifindex = 0; /* no master interface */
2266 else if (r < 0)
0d411b7f 2267 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2268
571bf1aa
YW		 2269 if (master_ifindex == link->ifindex)
2270 master_ifindex = 0;
2271
74e95e3a
YW		 2272 if (master_ifindex != link->master_ifindex) {
2273 if (link->master_ifindex == 0)
2274 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
2275 else if (master_ifindex == 0)
2276 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
2277 else
2278 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
1ae9b0cf 2279 glyph(GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2280
74e95e3a
YW		 2281 link_drop_from_master(link);
2282 link->master_ifindex = master_ifindex;
7dde00ca
YW		 2283
2284 /* Updating master ifindex may cause operational state change, e.g. carrier <-> enslaved */
2285 link_dirty(link);
74e95e3a 2286 }
413708d1 2287
0d411b7f
YW		 2288 r = link_append_to_master(link);
2289 if (r < 0)
2290 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2291
0d411b7f
YW		 2292 return 0;
2293}
807667f7 2294
e1658632
YW		 2295static int link_update_driver(Link *link, sd_netlink_message *message) {
2296 int r;
2297
2298 assert(link);
2299 assert(link->manager);
2300 assert(message);
2301
2302 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2303 if (link->ethtool_driver_read)
e1658632
YW		 2304 return 0;
2305
2306 /* When udevd is running, read the driver after the interface is initialized by udevd.
2307 * Otherwise, ethtool may not work correctly. See issue #22538.
2308 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2309 if (udev_available() && !link->dev)
e1658632
YW		 2310 return 0;
2311
6625c39e
YW		 2312 link->ethtool_driver_read = true;
2313
e1658632
YW		 2314 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2315 if (r < 0) {
2316 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2317 return 0;
2318 }
2319
2320 log_link_debug(link, "Found driver: %s", strna(link->driver));
2321
2322 if (streq_ptr(link->driver, "dsa")) {
2323 uint32_t dsa_master_ifindex = 0;
2324
2325 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2326 if (r < 0 && r != -ENODATA)
2327 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2328
2329 if (dsa_master_ifindex > INT_MAX) {
2330 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2331 dsa_master_ifindex);
2332 dsa_master_ifindex = 0;
2333 }
2334
2335 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2336 }
2337
40695457 2338 return 1; /* needs reconfigure */
e1658632
YW		 2339}
2340
6625c39e
YW		 2341static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2342 int r;
2343
2344 assert(link);
2345 assert(link->manager);
2346 assert(message);
2347
2348 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2349 return 0;
2350
2351 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
04f05d9b
YW		 2352 if (r == -ENODATA)
2353 return 0;
2354 if (r < 0)
2355 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
e1658632
YW		 2356
2357 if (link->permanent_hw_addr.length > 0)
2358 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2359
40695457 2360 return 1; /* needs reconfigure */
e1658632
YW		 2361}
2362
0d411b7f 2363static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2364 struct hw_addr_data addr;
0d411b7f 2365 int r;
d93d655c 2366
0d411b7f
YW		 2367 assert(link);
2368 assert(message);
dfc58b47 2369
0d411b7f
YW		 2370 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2371 if (r < 0 && r != -ENODATA)
2372 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2373
e2bacccd 2374 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2375 if (r == -ENODATA)
2376 return 0;
2377 if (r < 0)
fe321d45 2378 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2379
e2bacccd 2380 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2381 return 0;
a61bb41c 2382
de0f1579 2383 if (link->hw_addr.length == 0)
e2bacccd 2384 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2385 else {
e2341b6b
DT		 2386 log_link_debug(link, "Hardware address is changed: %s %s %s",
2387 HW_ADDR_TO_STR(&link->hw_addr),
1ae9b0cf 2388 glyph(GLYPH_ARROW_RIGHT),
e2341b6b 2389 HW_ADDR_TO_STR(&addr));
0d411b7f 2390
e74f1d07 2391 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2392 }
2393
e2bacccd
YW		 2394 link->hw_addr = addr;
2395
fe321d45
YW		 2396 if (!hw_addr_is_null(&link->hw_addr)) {
2397 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2398 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2399 /* bonding master and its slaves have the same hardware address. */
2400 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2401 if (r < 0)
2402 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2403 }
0d411b7f 2404
0a14f83a 2405 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2406 if (r < 0)
2407 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2408
0d411b7f 2409 r = ipv4ll_update_mac(link);
a61bb41c 2410 if (r < 0)
0d411b7f 2411 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2412
0d411b7f
YW		 2413 r = dhcp4_update_mac(link);
2414 if (r < 0)
2415 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2416
0d411b7f
YW		 2417 r = dhcp6_update_mac(link);
2418 if (r < 0)
2419 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2420
2421 r = radv_update_mac(link);
2422 if (r < 0)
2423 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2424
3be64aa4 2425 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2426 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2427 if (r < 0)
0d411b7f
YW		 2428 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2429 }
d236718c 2430
35778343
YW		 2431 if (link->lldp_rx) {
2432 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2433 if (r < 0)
c01b9b87
YW		 2434 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2435 }
2436
2437 if (link->lldp_tx) {
2438 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2439 if (r < 0)
2440 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2441 }
2442
40695457 2443 return 1; /* needs reconfigure */
0d411b7f 2444}
a61bb41c 2445
0d411b7f 2446static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2447 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2448 int r;
a61bb41c 2449
0d411b7f
YW		 2450 assert(link);
2451 assert(message);
2452
2453 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2454 if (r == -ENODATA)
2455 return 0;
2456 if (r < 0)
2457 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2458 if (mtu == 0)
2459 return 0;
0d411b7f 2460
717ba5fc
YW		 2461 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2462 if (r < 0 && r != -ENODATA)
2463 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2464
2465 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2466 if (r < 0 && r != -ENODATA)
2467 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2468
717ba5fc
YW		 2469 if (max_mtu == 0)
2470 max_mtu = UINT32_MAX;
2471
2472 link->min_mtu = min_mtu;
2473 link->max_mtu = max_mtu;
2474
0d411b7f
YW		 2475 if (link->original_mtu == 0) {
2476 link->original_mtu = mtu;
717ba5fc
YW		 2477 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2478 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2479 }
2480
717ba5fc
YW		 2481 if (link->mtu == mtu)
2482 return 0;
2483
b5d0fd1e 2484 if (link->mtu != 0)
e2341b6b 2485 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
1ae9b0cf 2486 link->mtu, glyph(GLYPH_ARROW_RIGHT), mtu,
e2341b6b 2487 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2488
2489 link->mtu = mtu;
2490
7edfbf41 2491 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
eb426caa 2492 /* The kernel resets IPv6 MTU after changing device MTU. So, we need to re-set IPv6 MTU again. */
39283a1f 2493 (void) link_set_ipv6_mtu_async(link);
eb426caa 2494
0d411b7f
YW		 2495 if (link->dhcp_client) {
2496 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2497 if (r < 0)
0d411b7f
YW		 2498 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2499 }
a61bb41c 2500
0d411b7f
YW		 2501 if (link->radv) {
2502 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2503 if (r < 0)
0d411b7f 2504 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2505 }
2506
2507 return 0;
dd3efc09 2508}
fe8db0c5 2509
0d411b7f
YW		 2510static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2511 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2512 int r;
2513
2514 assert(link);
2515 assert(message);
2516
2517 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2518 if (r == -ENODATA)
2368ff81 2519 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2520 * interface has no alternative name. */
2521 return 0;
2522 if (r < 0)
0d411b7f
YW		 2523 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2524
1b345c1e
YW		 2525 if (strv_equal(altnames, link->alternative_names))
2526 return 0;
2527
0d411b7f
YW		 2528 STRV_FOREACH(n, link->alternative_names)
2529 hashmap_remove(link->manager->links_by_name, *n);
2530
2531 strv_free_and_replace(link->alternative_names, altnames);
2532
2533 STRV_FOREACH(n, link->alternative_names) {
2534 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2535 if (r < 0)
2536 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2537 }
2538
40695457 2539 return 1; /* needs reconfigure */
0d411b7f
YW		 2540}
2541
2542static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2543 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2544 const char *ifname;
2545 int r;
2546
2547 assert(link);
2548 assert(message);
2549
2550 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2551 if (r == -ENODATA)
7802194a 2552 /* Hmm?? But ok. */
0d411b7f
YW		 2553 return 0;
2554 if (r < 0)
2555 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2556
2557 if (streq(ifname, link->ifname))
2558 return 0;
2559
01afd0f7
YW		 2560 r = format_ifname(link->ifindex, ifname_from_index);
2561 if (r < 0)
2562 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2563
2564 if (!streq(ifname, ifname_from_index)) {
2565 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2566 "with the name currently configured on the actual interface '%s'. Ignoring.",
2567 ifname, ifname_from_index);
2568 return 0;
2569 }
2570
0d411b7f
YW		 2571 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2572
2573 hashmap_remove(link->manager->links_by_name, link->ifname);
2574
2575 r = free_and_strdup(&link->ifname, ifname);
2576 if (r < 0)
2577 return log_oom_debug();
2578
2579 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2580 if (r < 0)
2581 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2582
54d1fdb2
YW		 2583 if (link->dhcp_client) {
2584 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2585 if (r < 0)
2586 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2587 }
2588
2589 if (link->dhcp6_client) {
2590 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2591 if (r < 0)
e6c4b5dc 2592 return log_link_debug_errno(link, r, "Failed to update interface name in DHCPv6 client: %m");
54d1fdb2
YW		 2593 }
2594
2595 if (link->ndisc) {
2596 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2597 if (r < 0)
2598 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2599 }
2600
2601 if (link->dhcp_server) {
2602 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2603 if (r < 0)
2604 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2605 }
2606
2607 if (link->radv) {
2608 r = sd_radv_set_ifname(link->radv, link->ifname);
2609 if (r < 0)
2610 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2611 }
2612
35778343
YW		 2613 if (link->lldp_rx) {
2614 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2615 if (r < 0)
c01b9b87
YW		 2616 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2617 }
2618
2619 if (link->lldp_tx) {
2620 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2621 if (r < 0)
2622 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2623 }
2624
2625 if (link->ipv4ll) {
2626 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2627 if (r < 0)
2628 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2629 }
2630
86173383
YW		 2631 r = ipv4acd_set_ifname(link);
2632 if (r < 0)
2633 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2634
40695457 2635 return 1; /* needs reconfigure */
0d411b7f
YW		 2636}
2637
2638static int link_update(Link *link, sd_netlink_message *message) {
40695457 2639 bool needs_reconfigure = false;
0d411b7f
YW		 2640 int r;
2641
2642 assert(link);
2643 assert(message);
2644
2645 r = link_update_name(link, message);
2646 if (r < 0)
2647 return r;
40695457 2648 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2649
2650 r = link_update_alternative_names(link, message);
2651 if (r < 0)
2652 return r;
40695457 2653 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2654
2655 r = link_update_mtu(link, message);
2656 if (r < 0)
2657 return r;
2658
e1658632
YW		 2659 r = link_update_driver(link, message);
2660 if (r < 0)
2661 return r;
40695457 2662 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2663
2664 r = link_update_permanent_hardware_address(link, message);
2665 if (r < 0)
2666 return r;
40695457 2667 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2668
0d411b7f
YW		 2669 r = link_update_hardware_address(link, message);
2670 if (r < 0)
2671 return r;
40695457 2672 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2673
2674 r = link_update_master(link, message);
2675 if (r < 0)
2676 return r;
2677
7d0d832d
YW		 2678 r = link_update_ipv6ll_addrgen_mode(link, message);
2679 if (r < 0)
2680 return r;
2681
40695457
YW		 2682 r = link_update_flags(link, message);
2683 if (r < 0)
2684 return r;
2685
11cee6ef
YW		 2686 r = link_update_bridge_vlan(link, message);
2687 if (r < 0)
2688 return r;
2689
40695457 2690 return needs_reconfigure;
0d411b7f
YW		 2691}
2692
0c9ee5d5
YW		 2693static Link *link_drop_or_unref(Link *link) {
2694 if (!link)
2695 return NULL;
2696 if (!link->manager)
2697 return link_unref(link);
2698 return link_drop(link);
2699}
2700
2701DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2702
2703static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
5a0f6adb 2704 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL;
0c9ee5d5 2705 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2706 unsigned short iftype;
2707 int r, ifindex;
0c9ee5d5
YW		 2708
2709 assert(manager);
2710 assert(message);
2711 assert(ret);
2712
0c9ee5d5
YW		 2713 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2714 if (r < 0)
0d411b7f 2715 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2716 else if (ifindex <= 0)
0d411b7f 2717 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2718
2719 r = sd_rtnl_message_link_get_type(message, &iftype);
2720 if (r < 0)
0d411b7f 2721 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2722
2723 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2724 if (r < 0)
0d411b7f 2725 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2726
2727 /* check for link kind */
2728 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2729 if (r >= 0) {
0d411b7f
YW		 2730 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2731 if (r < 0 && r != -ENODATA)
2732 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2733 r = sd_netlink_message_exit_container(message);
2734 if (r < 0)
0d411b7f 2735 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2736 }
2737
4c78dc17
YW		 2738 if (!manager->test_mode) {
2739 /* Do not update state files when running in test mode. */
2740 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2741 return log_oom_debug();
0d411b7f 2742
4c78dc17
YW		 2743 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2744 return log_oom_debug();
4c78dc17 2745 }
0d411b7f 2746
0c9ee5d5
YW		 2747 link = new(Link, 1);
2748 if (!link)
2749 return -ENOMEM;
2750
2751 *link = (Link) {
2752 .n_ref = 1,
2753 .state = LINK_STATE_PENDING,
2754 .online_state = _LINK_ONLINE_STATE_INVALID,
c2eb7753 2755 .automatic_reconfigure_ratelimit = (const RateLimit) { .interval = 10 * USEC_PER_SEC, .burst = 5 },
0c9ee5d5
YW		 2756 .ifindex = ifindex,
2757 .iftype = iftype,
2758 .ifname = TAKE_PTR(ifname),
2759 .kind = TAKE_PTR(kind),
2760
11cee6ef
YW		 2761 .bridge_vlan_pvid = UINT16_MAX,
2762
7d0d832d
YW		 2763 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2764
0d411b7f
YW		 2765 .state_file = TAKE_PTR(state_file),
2766 .lease_file = TAKE_PTR(lease_file),
0d411b7f 2767
0c9ee5d5
YW		 2768 .n_dns = UINT_MAX,
2769 .dns_default_route = -1,
2770 .llmnr = _RESOLVE_SUPPORT_INVALID,
2771 .mdns = _RESOLVE_SUPPORT_INVALID,
2772 .dnssec_mode = _DNSSEC_MODE_INVALID,
2773 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2774 };
2775
4cf443e6 2776 r = hashmap_ensure_put(&manager->links_by_index, &link_hash_ops, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2777 if (r < 0)
0d411b7f 2778 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2779
2780 link->manager = manager;
2781
0d411b7f 2782 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2783 if (r < 0)
0d411b7f 2784 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2785
8a77e245
YW		 2786 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2787 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2788
9c5b8d46
AŠ		 2789 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2790 * message arrived too early. Request the wireless link information again.
2791 */
2792 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2793 r = link_get_wlan_interface(link);
2794 if (r < 0)
2795 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2796 }
2797
0c9ee5d5 2798 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2799 return 0;
2800}
2801
0d411b7f 2802int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2803 Link *link = NULL;
2804 NetDev *netdev = NULL;
2805 uint16_t type;
2806 const char *name;
2807 int r, ifindex;
2808
2809 assert(rtnl);
2810 assert(message);
0d411b7f 2811 assert(manager);
3be9d62a
YW		 2812
2813 if (sd_netlink_message_is_error(message)) {
2814 r = sd_netlink_message_get_errno(message);
2815 if (r < 0)
2816 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2817
2818 return 0;
2819 }
2820
2821 r = sd_netlink_message_get_type(message, &type);
2822 if (r < 0) {
2823 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2824 return 0;
2825 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2826 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2827 return 0;
2828 }
2829
2830 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2831 if (r < 0) {
2832 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2833 return 0;
2834 } else if (ifindex <= 0) {
2835 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2836 return 0;
2837 }
2838
2839 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2840 if (r < 0) {
2841 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2842 return 0;
2843 }
2844
6eab614d 2845 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2846 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2847
2848 switch (type) {
2849 case RTM_NEWLINK:
0d411b7f
YW		 2850 if (netdev) {
2851 /* netdev exists, so make sure the ifindex matches */
2852 r = netdev_set_ifindex(netdev, message);
2853 if (r < 0) {
66141164 2854 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
bc0d3f38 2855 netdev_enter_failed(netdev);
0d411b7f
YW		 2856 return 0;
2857 }
2858 }
2859
3be9d62a
YW		 2860 if (!link) {
2861 /* link is new, so add it */
0d411b7f 2862 r = link_new(manager, message, &link);
3be9d62a 2863 if (r < 0) {
0d411b7f 2864 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2865 return 0;
2866 }
3be9d62a 2867
0d411b7f 2868 r = link_update(link, message);
3be9d62a 2869 if (r < 0) {
66141164 2870 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2871 link_enter_failed(link);
3be9d62a
YW		 2872 return 0;
2873 }
3be9d62a 2874
30d5d11b
YW		 2875 if (link->manager->test_mode) {
2876 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
2877 link_set_state(link, LINK_STATE_UNMANAGED);
2878 return 0;
2879 }
2880
9c402e3a
YW		 2881 /* Do not enter initialized state if we are enumerating. */
2882 if (manager->enumerating)
2883 return 0;
2884
0d411b7f
YW		 2885 r = link_check_initialized(link);
2886 if (r < 0) {
66141164 2887 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2888 link_enter_failed(link);
2889 return 0;
2890 }
2891 } else {
2892 r = link_update(link, message);
2893 if (r < 0) {
66141164 2894 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2895 link_enter_failed(link);
2896 return 0;
2897 }
30d5d11b
YW		 2898 if (r == 0)
2899 return 0;
2900
2901 if (link->manager->test_mode) {
2902 log_link_debug(link, "Running in test mode, refusing to configure interface.");
2903 link_set_state(link, LINK_STATE_UNMANAGED);
2904 return 0;
2905 }
2906
9c402e3a
YW		 2907 /* Do not configure interface if we are enumerating. */
2908 if (manager->enumerating)
2909 return 0;
2910
93378148 2911 r = link_reconfigure_impl(link, /* flags= */ 0);
30d5d11b
YW		 2912 if (r < 0) {
2913 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2914 link_enter_failed(link);
2915 return 0;
40695457 2916 }
3be9d62a 2917 }
3be9d62a
YW		 2918 break;
2919
2920 case RTM_DELLINK:
2921 link_drop(link);
2922 netdev_drop(netdev);
3be9d62a
YW		 2923 break;
2924
2925 default:
04499a70 2926 assert_not_reached();
3be9d62a
YW		 2927 }
2928
2929 return 1;
2930}
2931
79c6e114
YW		 2932int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2933 uint16_t message_type;
2934 int r;
2935
2936 assert(m);
2937 assert(link);
2938 assert(error_msg);
2939
2940 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2941 return 0;
2942
2943 r = sd_netlink_message_get_errno(m);
2944 if (r < 0) {
d28746ef 2945 log_link_message_warning_errno(link, m, r, "%s", error_msg);
79c6e114
YW		 2946 link_enter_failed(link);
2947 return 0;
2948 }
2949
2950 r = sd_netlink_message_get_type(m, &message_type);
2951 if (r < 0) {
2952 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2953 return 0;
2954 }
2955 if (message_type != RTM_NEWLINK) {
2956 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2957 return 0;
2958 }
2959
2960 r = link_update(link, m);
2961 if (r < 0) {
2962 link_enter_failed(link);
2963 return 0;
2964 }
2965
2966 return 1;
2967}
2968
2969int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2970 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2971 int r;
2972
2973 assert(link);
2974 assert(link->manager);
2975 assert(link->manager->rtnl);
2976 assert(callback);
2977
2978 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2979 if (r < 0)
2980 return r;
2981
2982 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2983 link_netlink_destroy_callback, link);
2984 if (r < 0)
2985 return r;
2986
2987 link_ref(link);
2988 return 0;
2989}
2990
fe8db0c5 2991static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2992 [LINK_STATE_PENDING] = "pending",
bd08ce56 2993 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2994 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2995 [LINK_STATE_CONFIGURED] = "configured",
2996 [LINK_STATE_UNMANAGED] = "unmanaged",
2997 [LINK_STATE_FAILED] = "failed",
2998 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2999};
3000
3001DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 3002
3003int link_flags_to_string_alloc(uint32_t flags, char **ret) {
3004 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 3005 static const char* map[] = {
3006 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 3007 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 3008 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
3009 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
3010 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
3011 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
3012 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
3013 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
3014 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
3015 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
3016 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
3017 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 3018 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 3019 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
3020 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
3021 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
3022 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
3023 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
3024 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 3025 };
3026
3027 assert(ret);
3028
3029 for (size_t i = 0; i < ELEMENTSOF(map); i++)
1e4e5572 3030 if (BIT_SET(flags, i) && map[i])
19aa7eeb
ZJS		 3031 if (!strextend_with_separator(&str, ",", map[i]))
3032 return -ENOMEM;
7ae55b78
YW		 3033
3034 *ret = TAKE_PTR(str);
3035 return 0;
3036}
3037
3038static const char * const kernel_operstate_table[] = {
3039 [IF_OPER_UNKNOWN] = "unknown",
3040 [IF_OPER_NOTPRESENT] = "not-present",
3041 [IF_OPER_DOWN] = "down",
3042 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
3043 [IF_OPER_TESTING] = "testing",
3044 [IF_OPER_DORMANT] = "dormant",
3045 [IF_OPER_UP] = "up",
3046};
3047
3048DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
a7fa29b1
LP		 3049
3050bool link_has_local_lease_domain(Link *link) {
3051 assert(link);
3052
3053 return link->dhcp_server &&
3054 link->network &&
3055 link->network->dhcp_server_local_lease_domain &&
3056 !dns_name_is_root(link->network->dhcp_server_local_lease_domain);
3057}
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