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network: rewrite dynamic addressing protocol checkers in link_check_ready()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
176b8be1 3#include <net/if.h>
9aa5d8ba 4#include <netinet/in.h>
f579559b 5#include <linux/if.h>
8f815e8b 6#include <linux/if_arp.h>
518cd6b5 7#include <linux/if_link.h>
2a0d07d6 8#include <linux/netdevice.h>
8430841b 9#include <sys/socket.h>
4cc7a82c 10#include <unistd.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
8a77e245 13#include "arphrd-util.h"
c0267a59 14#include "batadv.h"
737f1405
YW		 15#include "bond.h"
16#include "bridge.h"
1346b1f0 17#include "bus-util.h"
3be9d62a
YW		 18#include "device-private.h"
19#include "device-util.h"
27dfc982 20#include "dhcp-identifier.h"
bd91b83e 21#include "dhcp-lease-internal.h"
686d13b9 22#include "env-file.h"
4bb7cc82 23#include "ethtool-util.h"
6706ce2f 24#include "event-util.h"
3ffd4af2 25#include "fd-util.h"
cf1d700d 26#include "fileio.h"
176b8be1 27#include "format-util.h"
af664001 28#include "fs-util.h"
e2341b6b 29#include "glyph-util.h"
3ae6b3bf 30#include "logarithm.h"
ef118d00 31#include "missing_network.h"
cf1d700d 32#include "netlink-util.h"
c6f7c917 33#include "network-internal.h"
fb486c90 34#include "networkd-address-label.h"
093e3533 35#include "networkd-address.h"
9671ae9d 36#include "networkd-bridge-fdb.h"
ff9e0783 37#include "networkd-bridge-mdb.h"
3ddcbeea 38#include "networkd-can.h"
d5ebcf65 39#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 40#include "networkd-dhcp-server.h"
ca5ad760
YW		 41#include "networkd-dhcp4.h"
42#include "networkd-dhcp6.h"
76a86ffd 43#include "networkd-ipv4acd.h"
ca5ad760 44#include "networkd-ipv4ll.h"
76c5a0f2 45#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 46#include "networkd-link-bus.h"
47#include "networkd-link.h"
8e1ad1ea 48#include "networkd-lldp-tx.h"
23f53b99 49#include "networkd-manager.h"
1e7a0e21 50#include "networkd-ndisc.h"
e4a71bf3 51#include "networkd-neighbor.h"
75156ccb 52#include "networkd-nexthop.h"
19d9a5ad 53#include "networkd-queue.h"
7465dd22 54#include "networkd-radv.h"
3b6a3bde 55#include "networkd-route.h"
bce67bbe 56#include "networkd-routing-policy-rule.h"
0fa8ee6c 57#include "networkd-setlink.h"
19d9a5ad 58#include "networkd-sriov.h"
3b5a4fc6 59#include "networkd-state-file.h"
19d9a5ad 60#include "networkd-sysctl.h"
986b2514 61#include "networkd-wifi.h"
cf1d700d
TG		 62#include "set.h"
63#include "socket-util.h"
15a5e950 64#include "stdio-util.h"
8b43440b 65#include "string-table.h"
51517f9e 66#include "strv.h"
34658df2 67#include "tc.h"
e4de7287 68#include "tmpfile-util.h"
af7a86b8 69#include "tuntap.h"
299ad32d 70#include "udev-util.h"
737f1405 71#include "vrf.h"
fc2f9534 72
5e0534f1 73bool link_ipv6_enabled(Link *link) {
439689c6
SS		 74 assert(link);
75
76 if (!socket_ipv6_is_supported())
77 return false;
78
5fb5fae9 79 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 80 return false;
81
5fb5fae9
YW		 82 if (!link->network)
83 return false;
84
85 if (link->network->bond)
af9ba57a
YW		 86 return false;
87
bd7e0a3f 88 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 89 return true;
90
91 if (network_has_static_ipv6_configurations(link->network))
92 return true;
93
94 return false;
439689c6
SS		 95}
96
e33232d4 97static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 98 assert(link);
99
d8d4db58
YW		 100 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
101 return false;
102
2fd3908b
YW		 103 if (!link->network)
104 return allow_unmanaged;
7191a57a 105
baa95d22
YW		 106 if (!link->network->configure_without_carrier) {
107 if (link->set_flags_messages > 0)
108 return false;
109
110 if (!link_has_carrier(link))
111 return false;
112 }
7191a57a 113
0fa8ee6c
YW		 114 if (link->set_link_messages > 0)
115 return false;
116
112a0972
YW		 117 if (!link->activated)
118 return false;
112a0972 119
7191a57a
YW		 120 return true;
121}
122
e33232d4
YW		 123bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
124 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
125}
126
15761549
YW		 127void link_ntp_settings_clear(Link *link) {
128 link->ntp = strv_free(link->ntp);
129}
130
131void link_dns_settings_clear(Link *link) {
f5fbe71d 132 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 133 for (unsigned i = 0; i < link->n_dns; i++)
134 in_addr_full_free(link->dns[i]);
15761549 135 link->dns = mfree(link->dns);
f5fbe71d 136 link->n_dns = UINT_MAX;
15761549 137
6e4571f0
YW		 138 link->search_domains = ordered_set_free(link->search_domains);
139 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 140
141 link->dns_default_route = -1;
142 link->llmnr = _RESOLVE_SUPPORT_INVALID;
143 link->mdns = _RESOLVE_SUPPORT_INVALID;
144 link->dnssec_mode = _DNSSEC_MODE_INVALID;
145 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
146
147 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
148}
149
1a6bb31f
YW		 150static void link_free_engines(Link *link) {
151 if (!link)
152 return;
153
154 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 155
1a6bb31f
YW		 156 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
157 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 158 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 159
35778343 160 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 161 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 162
1a6bb31f 163 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 164
1a6bb31f 165 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 166 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 167
1a6bb31f 168 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 169 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
170 ndisc_flush(link);
171
1a6bb31f
YW		 172 link->radv = sd_radv_unref(link->radv);
173}
174
8301aa0b 175static Link *link_free(Link *link) {
8301aa0b 176 assert(link);
f579559b 177
15761549
YW		 178 link_ntp_settings_clear(link);
179 link_dns_settings_clear(link);
180
8eec0b9d 181 link->routes = set_free(link->routes);
8eec0b9d 182 link->nexthops = set_free(link->nexthops);
8eec0b9d 183 link->neighbors = set_free(link->neighbors);
8eec0b9d 184 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 185 link->qdiscs = set_free(link->qdiscs);
186 link->tclasses = set_free(link->tclasses);
adda1ed9 187
a27588d4 188 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 189
1a6bb31f 190 link_free_engines(link);
49699bac 191
b0ff6dea 192 set_free(link->sr_iov_virt_port_ifindices);
c166a070 193 free(link->ifname);
572b21d9 194 strv_free(link->alternative_names);
ceac4078 195 free(link->kind);
8d968fdd 196 free(link->ssid);
6706ce2f 197 free(link->previous_ssid);
c643bda5 198 free(link->driver);
6cad256d 199
a34e58d4
YW		 200 unlink_and_free(link->lease_file);
201 unlink_and_free(link->lldp_file);
202 unlink_and_free(link->state_file);
c166a070 203
8de56fb3 204 sd_device_unref(link->dev);
9aa2585e 205 netdev_unref(link->netdev);
b5db00e5 206
0d4ad91d 207 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 208 hashmap_free(link->bound_by_links);
209
5f707e12 210 set_free_with_destructor(link->slaves, link_unref);
033295c1 211
c9c908a6
YW		 212 network_unref(link->network);
213
6706ce2f
YW		 214 sd_event_source_disable_unref(link->carrier_lost_timer);
215
8301aa0b 216 return mfree(link);
14b746f7
TG		 217}
218
8301aa0b 219DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 220
6eab614d 221int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 222 Link *link;
11a7f229
TG		 223
224 assert(m);
e856ed00 225 assert(ifindex > 0);
11a7f229 226
6eab614d 227 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 228 if (!link)
229 return -ENODEV;
230
0b54c870
YW		 231 if (ret)
232 *ret = link;
233 return 0;
234}
235
236int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
237 Link *link;
238
239 assert(m);
240 assert(ifname);
11a7f229 241
0b54c870
YW		 242 link = hashmap_get(m->links_by_name, ifname);
243 if (!link)
244 return -ENODEV;
245
246 if (ret)
247 *ret = link;
11a7f229
TG		 248 return 0;
249}
250
fe321d45
YW		 251int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
252 Link *link;
253
254 assert(m);
255 assert(hw_addr);
256
257 link = hashmap_get(m->links_by_hw_addr, hw_addr);
258 if (!link)
259 return -ENODEV;
260
261 if (ret)
262 *ret = link;
263 return 0;
264}
265
81357285
YW		 266int link_get_master(Link *link, Link **ret) {
267 assert(link);
268 assert(link->manager);
269 assert(ret);
270
271 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
272 return -ENODEV;
273
6eab614d 274 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 275}
276
af9ba57a 277void link_set_state(Link *link, LinkState state) {
e331e246
TG		 278 assert(link);
279
280 if (link->state == state)
281 return;
282
0beb9542
YW		 283 log_link_debug(link, "State changed: %s -> %s",
284 link_state_to_string(link->state),
285 link_state_to_string(state));
286
e331e246
TG		 287 link->state = state;
288
289 link_send_changed(link, "AdministrativeState", NULL);
9092113d 290 link_dirty(link);
e331e246
TG		 291}
292
2a99eed0 293int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 294 int r = 0, k;
295
296 assert(link);
297 assert(link->manager);
298 assert(link->manager->event);
299
80060352
ZJS		 300 bool keep_dhcp = may_keep_dhcp &&
301 link->network &&
76a86ffd 302 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 303 (link->manager->restarting ||
304 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
305
84add3cd 306 if (!keep_dhcp) {
111bb8f9 307 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 308 if (k < 0)
36c7d709 309 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 310 }
311
2a99eed0
YW		 312 k = sd_dhcp_server_stop(link->dhcp_server);
313 if (k < 0)
314 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
315
35778343 316 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 317 if (k < 0)
c01b9b87
YW		 318 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
319
320 k = sd_lldp_tx_stop(link->lldp_tx);
321 if (k < 0)
322 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 323
84add3cd
YW		 324 k = sd_ipv4ll_stop(link->ipv4ll);
325 if (k < 0)
326 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 327
76a86ffd 328 k = ipv4acd_stop(link);
2488e4d9
YW		 329 if (k < 0)
330 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 331
84add3cd
YW		 332 k = sd_dhcp6_client_stop(link->dhcp6_client);
333 if (k < 0)
334 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 335
a27588d4 336 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 337 if (k < 0)
338 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 339
77302468 340 k = ndisc_stop(link);
84add3cd
YW		 341 if (k < 0)
342 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 343
259c65f3
YW		 344 ndisc_flush(link);
345
84add3cd
YW		 346 k = sd_radv_stop(link->radv);
347 if (k < 0)
348 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 349
111bb8f9
TG		 350 return r;
351}
352
b22d8a00 353void link_enter_failed(Link *link) {
ef1ba606 354 assert(link);
f882c247 355
370e9930 356 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 357 return;
358
6a7a4e4d 359 log_link_warning(link, "Failed");
449f7554 360
e331e246 361 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 362
2a99eed0 363 (void) link_stop_engines(link, false);
f882c247
TG		 364}
365
6accfd31
DA		 366void link_check_ready(Link *link) {
367 Address *a;
6accfd31
DA		 368
369 assert(link);
370
5f58af25
YW		 371 if (link->state == LINK_STATE_CONFIGURED)
372 return;
373
d19b9939
YW		 374 if (link->state != LINK_STATE_CONFIGURING)
375 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 376
377 if (!link->network)
a7f07cbe 378 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 379
7558f9e7
YW		 380 if (!link->tc_configured)
381 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 382
a7f07cbe
YW		 383 if (link->set_link_messages > 0)
384 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
385
386 if (!link->activated)
387 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
388
7558f9e7
YW		 389 if (link->iftype == ARPHRD_CAN) {
390 /* let's shortcut things for CAN which doesn't need most of checks below. */
391 link_set_state(link, LINK_STATE_CONFIGURED);
392 return;
393 }
394
879377ca
YW		 395 if (!link->stacked_netdevs_created)
396 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
397
76c5a0f2 398 if (!link->static_addresses_configured)
d19b9939 399 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 400
90e74a66 401 SET_FOREACH(a, link->addresses)
c71384a9
ZJS		 402 if (!address_is_ready(a))
403 return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__,
404 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
6aa5773b 405
354bc760
YW		 406 if (!link->static_address_labels_configured)
407 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
408
e5b35bf6
YW		 409 if (!link->static_bridge_fdb_configured)
410 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
411
ff9e0783
YW		 412 if (!link->static_bridge_mdb_configured)
413 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
414
fdeba3f5
YW		 415 if (!link->static_ipv6_proxy_ndp_configured)
416 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
417
40ca350e
YW		 418 if (!link->static_neighbors_configured)
419 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
420
d19b9939
YW		 421 if (!link->static_nexthops_configured)
422 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 423
76c5a0f2
YW		 424 if (!link->static_routes_configured)
425 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
426
0e5ef6be 427 if (!link->static_routing_policy_rules_configured)
d19b9939 428 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 429
d19b9939
YW		 430 if (!link->sr_iov_configured)
431 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 432
4bcb8625
YW		 433 /* IPv6LL is assigned after the link gains its carrier. */
434 if (!link->network->configure_without_carrier &&
435 link_ipv6ll_enabled(link) &&
436 !in6_addr_is_set(&link->ipv6ll_address))
437 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
438
5f950e56
YW		 439 /* If no dynamic addressing protocol enabled, assume the interface is ready.
440 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
441 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
442 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
443 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
444 goto ready;
445
446 bool ipv4ll_ready =
447 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
448 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
449 bool dhcp4_ready =
450 link_dhcp4_enabled(link) && link->dhcp4_configured &&
451 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
452 bool dhcp6_ready =
453 link_dhcp6_enabled(link) && link->dhcp6_configured &&
454 (!link->network->dhcp6_use_address ||
455 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
456 bool dhcp_pd_ready =
457 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
458 (!link->network->dhcp_pd_assign ||
459 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
460 bool ndisc_ready =
461 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
462 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
463 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
464
465 /* At least one dynamic addressing protocol is finished. */
466 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
467 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
468
469 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
470 __func__,
471 yes_no(ipv4ll_ready),
472 yes_no(dhcp4_ready),
473 yes_no(dhcp6_ready),
474 yes_no(dhcp_pd_ready),
475 yes_no(ndisc_ready));
476
477ready:
29836c16 478 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 479}
480
97108953 481static int link_request_static_configs(Link *link) {
f882c247
TG		 482 int r;
483
484 assert(link);
485 assert(link->network);
f5be5601 486 assert(link->state != _LINK_STATE_INVALID);
f882c247 487
354bc760 488 r = link_request_static_addresses(link);
0e5ef6be
YW		 489 if (r < 0)
490 return r;
491
354bc760 492 r = link_request_static_address_labels(link);
f3ef324d
YW		 493 if (r < 0)
494 return r;
e4a71bf3 495
e5b35bf6
YW		 496 r = link_request_static_bridge_fdb(link);
497 if (r < 0)
498 return r;
499
9a038aac
YW		 500 r = link_request_static_bridge_mdb(link);
501 if (r < 0)
502 return r;
503
fdeba3f5
YW		 504 r = link_request_static_ipv6_proxy_ndp_addresses(link);
505 if (r < 0)
506 return r;
507
40ca350e 508 r = link_request_static_neighbors(link);
682c65b0
YW		 509 if (r < 0)
510 return r;
bd6379ec 511
76c5a0f2 512 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 513 if (r < 0)
514 return r;
f882c247 515
76c5a0f2
YW		 516 r = link_request_static_routes(link, false);
517 if (r < 0)
518 return r;
519
520 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 521 if (r < 0)
522 return r;
d4cdbea5 523
f882c247
TG		 524 return 0;
525}
526
1187fc33
YW		 527static int link_request_stacked_netdevs(Link *link) {
528 NetDev *netdev;
e16e4b3b
DS		 529 int r;
530
531 assert(link);
532
1187fc33 533 link->stacked_netdevs_created = false;
e16e4b3b 534
1187fc33 535 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 536 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 537 if (r < 0)
538 return r;
539 }
e16e4b3b 540
bb916f35 541 if (link->create_stacked_netdev_messages == 0) {
1187fc33 542 link->stacked_netdevs_created = true;
bb916f35
YW		 543 link_check_ready(link);
544 }
e16e4b3b
DS		 545
546 return 0;
547}
548
8566df79 549static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 550 int r;
551
552 assert(link);
553
0f96a823
YW		 554 r = radv_start(link);
555 if (r < 0)
556 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 557
294f129b
YW		 558 r = ndisc_start(link);
559 if (r < 0)
560 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 561
294f129b
YW		 562 r = dhcp6_start(link);
563 if (r < 0)
564 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 565
e7ab854c
TG		 566 return 0;
567}
568
8566df79 569static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 570 int r;
571
572 assert(link);
ff254138
TG		 573 assert(link->manager);
574 assert(link->manager->event);
575
0107b769 576 if (link->dhcp_client) {
294f129b 577 r = dhcp4_start(link);
0107b769 578 if (r < 0)
294f129b 579 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 580
ccffa166 581 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 582
ccffa166 583 } else if (link->ipv4ll) {
59c27231
AK		 584 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
585 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
586 if (r < 0)
587 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
588 }
589
5c1d3fc9 590 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 591 if (r < 0)
592 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 593
594 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 595 }
596
ab486ef4
YW		 597 if (link->dhcp_server) {
598 r = sd_dhcp_server_start(link->dhcp_server);
599 if (r < 0)
600 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
601 }
602
76a86ffd
YW		 603 r = ipv4acd_start(link);
604 if (r < 0)
605 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
606
6fc25497
SS		 607 return 0;
608}
609
8566df79 610static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 611 int r;
612
613 assert(link);
0f96a823 614 assert(link->network);
6fc25497 615
8566df79 616 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 617 if (r < 0)
618 return r;
619
94876904 620 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 621 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 622 if (r < 0)
623 return r;
624 }
625
a27588d4 626 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 627 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
628 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
629 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
630 * below will be called in radv_start(). */
a27588d4 631 r = dhcp_request_prefix_delegation(link);
0f96a823 632 if (r < 0)
a27588d4 633 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 634 }
635
c01b9b87
YW		 636 if (link->lldp_tx) {
637 r = sd_lldp_tx_start(link->lldp_tx);
638 if (r < 0)
639 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
640 }
8e1ad1ea 641
35778343
YW		 642 if (link->lldp_rx) {
643 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 644 if (r < 0)
645 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
646 }
647
ff254138
TG		 648 return 0;
649}
650
7657ec3e 651int link_ipv6ll_gained(Link *link) {
0c9ee5d5 652 int r;
deb2e523 653
0c9ee5d5 654 assert(link);
deb2e523 655
0c9ee5d5 656 log_link_info(link, "Gained IPv6LL");
deb2e523 657
7657ec3e
YW		 658 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
659 return 0;
0c9ee5d5 660
7657ec3e
YW		 661 r = link_acquire_dynamic_ipv6_conf(link);
662 if (r < 0)
663 return r;
0c9ee5d5 664
7657ec3e 665 link_check_ready(link);
0c9ee5d5 666 return 0;
deb2e523
TG		 667}
668
112a0972 669int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 670 bool required_up = false;
671 bool link_is_up = false;
852a3916 672 Link *l;
0d4ad91d
AR		 673
674 assert(link);
675
ad82f0c3
YW		 676 /* If at least one interface in bound_to_links has carrier, then make this interface up.
677 * If all interfaces in bound_to_links do not, then make this interface down. */
678
0d4ad91d
AR		 679 if (hashmap_isempty(link->bound_to_links))
680 return 0;
681
682 if (link->flags & IFF_UP)
683 link_is_up = true;
684
852a3916 685 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 686 if (link_has_carrier(l)) {
687 required_up = true;
688 break;
689 }
690
852a3916 691 if (!required_up && link_is_up)
68f52063 692 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 693 if (required_up && !link_is_up)
68f52063 694 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 695
696 return 0;
697}
698
699static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 700 Link *l;
701 int r;
702
703 assert(link);
704
ad82f0c3
YW		 705 /* Update up or down state of interfaces which depend on this interface's carrier state. */
706
0d4ad91d
AR		 707 if (hashmap_isempty(link->bound_by_links))
708 return 0;
709
852a3916 710 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 711 r = link_handle_bound_to_list(l);
712 if (r < 0)
713 return r;
714 }
715
716 return 0;
717}
718
719static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
720 int r;
721
722 assert(link);
723 assert(carrier);
724
725 if (link == carrier)
726 return 0;
727
728 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
729 return 0;
730
190b3b5c 731 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 732 if (r < 0)
733 return r;
734
9092113d
YW		 735 link_dirty(link);
736
0d4ad91d
AR		 737 return 0;
738}
739
740static int link_new_bound_by_list(Link *link) {
741 Manager *m;
742 Link *carrier;
0d4ad91d 743 int r;
0d4ad91d
AR		 744
745 assert(link);
746 assert(link->manager);
747
748 m = link->manager;
749
6eab614d 750 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 751 if (!carrier->network)
752 continue;
753
754 if (strv_isempty(carrier->network->bind_carrier))
755 continue;
756
191a3f16 757 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 758 r = link_put_carrier(link, carrier, &link->bound_by_links);
759 if (r < 0)
760 return r;
0d4ad91d
AR		 761 }
762 }
763
90e74a66 764 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 765 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
766 if (r < 0)
767 return r;
0d4ad91d
AR		 768 }
769
770 return 0;
771}
772
773static int link_new_bound_to_list(Link *link) {
774 Manager *m;
775 Link *carrier;
0d4ad91d 776 int r;
0d4ad91d
AR		 777
778 assert(link);
779 assert(link->manager);
780
781 if (!link->network)
782 return 0;
783
784 if (strv_isempty(link->network->bind_carrier))
785 return 0;
786
787 m = link->manager;
788
6eab614d 789 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 790 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 791 r = link_put_carrier(link, carrier, &link->bound_to_links);
792 if (r < 0)
793 return r;
0d4ad91d
AR		 794 }
795 }
796
852a3916 797 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 798 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
799 if (r < 0)
800 return r;
0d4ad91d
AR		 801 }
802
803 return 0;
804}
805
0d4ad91d 806static void link_free_bound_to_list(Link *link) {
9092113d 807 bool updated = false;
0d4ad91d 808 Link *bound_to;
0d4ad91d 809
9092113d
YW		 810 assert(link);
811
812 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
813 updated = true;
0d4ad91d
AR		 814
815 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 816 link_dirty(bound_to);
0d4ad91d
AR		 817 }
818
9092113d
YW		 819 if (updated)
820 link_dirty(link);
0d4ad91d
AR		 821}
822
823static void link_free_bound_by_list(Link *link) {
9092113d 824 bool updated = false;
0d4ad91d 825 Link *bound_by;
0d4ad91d 826
9092113d
YW		 827 assert(link);
828
829 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
830 updated = true;
0d4ad91d
AR		 831
832 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 833 link_dirty(bound_by);
0d4ad91d
AR		 834 link_handle_bound_to_list(bound_by);
835 }
836 }
837
9092113d
YW		 838 if (updated)
839 link_dirty(link);
0d4ad91d
AR		 840}
841
81357285 842static int link_append_to_master(Link *link) {
5f707e12
YW		 843 Link *master;
844 int r;
845
846 assert(link);
5f707e12 847
81357285
YW		 848 /* - The link may have no master.
849 * - RTM_NEWLINK message about master interface may not be received yet. */
850 if (link_get_master(link, &master) < 0)
851 return 0;
5f707e12 852
de7fef4b 853 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 854 if (r <= 0)
5f707e12
YW		 855 return r;
856
857 link_ref(link);
858 return 0;
859}
860
81357285 861static void link_drop_from_master(Link *link) {
5f707e12
YW		 862 Link *master;
863
864 assert(link);
865
81357285 866 if (!link->manager)
5f707e12
YW		 867 return;
868
81357285 869 if (link_get_master(link, &master) < 0)
5f707e12
YW		 870 return;
871
872 link_unref(set_remove(master->slaves, link));
873}
874
56001f02
YW		 875static void link_drop_requests(Link *link) {
876 Request *req;
877
878 assert(link);
879 assert(link->manager);
880
881 ORDERED_SET_FOREACH(req, link->manager->request_queue)
882 if (req->link == link)
e26d3d40 883 request_detach(link->manager, req);
56001f02
YW		 884}
885
cc2d7efc 886static Link *link_drop(Link *link) {
63130eb3 887 if (!link)
cc2d7efc 888 return NULL;
0d4ad91d 889
63130eb3
YW		 890 assert(link->manager);
891
0d4ad91d
AR		 892 link_set_state(link, LINK_STATE_LINGER);
893
63130eb3
YW		 894 /* Drop all references from other links and manager. Note that async netlink calls may have
895 * references to the link, and they will be dropped when we receive replies. */
896
56001f02
YW		 897 link_drop_requests(link);
898
bb193d2d
YW		 899 link_free_bound_to_list(link);
900 link_free_bound_by_list(link);
0d4ad91d 901
b0ff6dea
YW		 902 link_clear_sr_iov_ifindices(link);
903
81357285 904 link_drop_from_master(link);
5f707e12 905
4c78dc17
YW		 906 if (link->state_file)
907 (void) unlink(link->state_file);
908
63130eb3
YW		 909 link_clean(link);
910
0b54c870
YW		 911 STRV_FOREACH(n, link->alternative_names)
912 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 913 hashmap_remove(link->manager->links_by_name, link->ifname);
914
fe321d45 915 /* bonding master and its slaves have the same hardware address. */
e74f1d07 916 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 917
63130eb3 918 /* The following must be called at last. */
6eab614d 919 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 920 return link_unref(link);
0d4ad91d
AR		 921}
922
5e5b137a 923static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 924 int k, r;
925
926 assert(link);
927 assert(link->manager);
5e5b137a 928
5e3bb5da
YW		 929 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
930 * to remove loopback address or addresses used for root NFS. */
931
932 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
933 return 0;
934 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
935 return 0;
936 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
937 return 0;
938
e36d601c 939 r = link_drop_foreign_routes(link);
5e5b137a 940
e36d601c 941 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 942 if (k < 0 && r >= 0)
943 r = k;
944
e36d601c 945 k = link_drop_foreign_addresses(link);
0b81225e
YW		 946 if (k < 0 && r >= 0)
947 r = k;
d1bdafd2 948
e36d601c 949 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 950 if (k < 0 && r >= 0)
951 r = k;
952
0b81225e
YW		 953 k = manager_drop_foreign_routing_policy_rules(link->manager);
954 if (k < 0 && r >= 0)
955 r = k;
956
957 return r;
5e5b137a
TG		 958}
959
a0e99a37 960static int link_drop_managed_config(Link *link) {
0b81225e
YW		 961 int k, r;
962
963 assert(link);
964 assert(link->manager);
3104883d 965
a0e99a37 966 r = link_drop_managed_routes(link);
3104883d 967
a0e99a37 968 k = link_drop_managed_nexthops(link);
0b81225e
YW		 969 if (k < 0 && r >= 0)
970 r = k;
d1bdafd2 971
a0e99a37 972 k = link_drop_managed_addresses(link);
0b81225e
YW		 973 if (k < 0 && r >= 0)
974 r = k;
975
a0e99a37 976 k = link_drop_managed_neighbors(link);
25b82b6e
YW		 977 if (k < 0 && r >= 0)
978 r = k;
979
a0e99a37 980 k = link_drop_managed_routing_policy_rules(link);
0b81225e
YW		 981 if (k < 0 && r >= 0)
982 r = k;
3104883d 983
0b81225e 984 return r;
3104883d
SS		 985}
986
b4564f4e
YW		 987static void link_foreignize_config(Link *link) {
988 assert(link);
989 assert(link->manager);
990
991 link_foreignize_routes(link);
992 link_foreignize_nexthops(link);
993 link_foreignize_addresses(link);
994 link_foreignize_neighbors(link);
995 link_foreignize_routing_policy_rules(link);
996}
997
c3b94251 998static int link_configure(Link *link) {
4ecdcb07
YW		 999 int r;
1000
ef1ba606 1001 assert(link);
b22d8a00 1002 assert(link->network);
bd08ce56 1003 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1004
1187fc33
YW		 1005 link_set_state(link, LINK_STATE_CONFIGURING);
1006
3cf58ef3
YW		 1007 r = link_new_bound_to_list(link);
1008 if (r < 0)
1009 return r;
1010
1dec9d81 1011 r = link_request_traffic_control(link);
4ecdcb07
YW		 1012 if (r < 0)
1013 return r;
1014
7558f9e7
YW		 1015 if (link->iftype == ARPHRD_CAN) {
1016 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1017 r = link_request_to_set_can(link);
1018 if (r < 0)
1019 return r;
1020
1021 return link_request_to_activate(link);
1022 }
1023
cb8453cc 1024 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1025 if (r < 0)
1026 return r;
1027
5e0534f1 1028 r = link_set_sysctl(link);
b69c3180
SS		 1029 if (r < 0)
1030 return r;
8749cbcd 1031
d05c332c 1032 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1033 if (r < 0)
1034 return r;
1035
72e65e6f
YW		 1036 r = link_request_to_set_ipoib(link);
1037 if (r < 0)
1038 return r;
1039
1187fc33 1040 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1041 if (r < 0)
1042 return r;
1043
1187fc33 1044 r = link_request_to_set_group(link);
99d2baa2
SS		 1045 if (r < 0)
1046 return r;
1047
1187fc33
YW		 1048 r = link_configure_mtu(link);
1049 if (r < 0)
1050 return r;
1051
1052 r = link_request_to_set_addrgen_mode(link);
1053 if (r < 0)
1054 return r;
1055
1056 r = link_request_to_set_master(link);
1057 if (r < 0)
1058 return r;
1059
1060 r = link_request_stacked_netdevs(link);
1061 if (r < 0)
1062 return r;
1063
1064 r = link_request_to_set_bond(link);
1065 if (r < 0)
1066 return r;
1067
1068 r = link_request_to_set_bridge(link);
1069 if (r < 0)
1070 return r;
1071
1072 r = link_request_to_set_bridge_vlan(link);
1073 if (r < 0)
1074 return r;
1075
1076 r = link_request_to_activate(link);
89fe6535
SS		 1077 if (r < 0)
1078 return r;
1079
2ffd6d73
YW		 1080 r = ipv4ll_configure(link);
1081 if (r < 0)
1082 return r;
64b21ece 1083
ccffa166 1084 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1085 if (r < 0)
1086 return r;
eb34d4af 1087
ccffa166 1088 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1089 if (r < 0)
1090 return r;
f5a8c43f 1091
ba4c7184 1092 r = link_request_ndisc(link);
2ffd6d73
YW		 1093 if (r < 0)
1094 return r;
4138fb2c 1095
1d28a3cf
YW		 1096 r = link_request_dhcp_server(link);
1097 if (r < 0)
1098 return r;
1099
a254fab2 1100 r = link_request_radv(link);
086b8853
YW		 1101 if (r < 0)
1102 return r;
7465dd22 1103
2ffd6d73
YW		 1104 r = link_lldp_rx_configure(link);
1105 if (r < 0)
1106 return r;
ce43e484 1107
c01b9b87
YW		 1108 r = link_lldp_tx_configure(link);
1109 if (r < 0)
1110 return r;
1111
5e3bb5da
YW		 1112 r = link_drop_foreign_config(link);
1113 if (r < 0)
1114 return r;
4c649652 1115
1187fc33
YW		 1116 r = link_request_static_configs(link);
1117 if (r < 0)
1118 return r;
1119
1120 if (!link_has_carrier(link))
1121 return 0;
1122
1123 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1124}
1125
170e88c8
YW		 1126static int link_get_network(Link *link, Network **ret) {
1127 Network *network;
1a3caa49 1128 int r;
170e88c8
YW		 1129
1130 assert(link);
1131 assert(link->manager);
1132 assert(ret);
1133
1134 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1135 bool warn = false;
1136
1a3caa49 1137 r = net_match_config(
170e88c8 1138 &network->match,
8de56fb3 1139 link->dev,
52135071
YW		 1140 &link->hw_addr,
1141 &link->permanent_hw_addr,
170e88c8
YW		 1142 link->driver,
1143 link->iftype,
65022cd7 1144 link->kind,
170e88c8
YW		 1145 link->ifname,
1146 link->alternative_names,
1147 link->wlan_iftype,
1148 link->ssid,
1a3caa49
YW		 1149 &link->bssid);
1150 if (r < 0)
1151 return r;
1152 if (r == 0)
170e88c8
YW		 1153 continue;
1154
8de56fb3 1155 if (network->match.ifname && link->dev) {
170e88c8
YW		 1156 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1157 const char *attr;
1158
8de56fb3 1159 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1160 (void) safe_atou8(attr, &name_assign_type);
1161
1162 warn = name_assign_type == NET_NAME_ENUM;
1163 }
1164
1165 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1166 "found matching network '%s'%s.",
1167 network->filename,
1168 warn ? ", based on potentially unpredictable interface name" : "");
1169
1170 if (network->unmanaged)
1171 return -ENOENT;
1172
1173 *ret = network;
1174 return 0;
1175 }
1176
1177 return -ENOENT;
1178}
1179
8a4ad01a 1180int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1181 Network *network = NULL;
9aa2585e 1182 NetDev *netdev = NULL;
ad932b15
YW		 1183 int r;
1184
5a1860f7 1185 assert(link);
572b21d9 1186
4faca0a3 1187 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1188 return 0;
1189
9aa2585e
YW		 1190 r = netdev_get(link->manager, link->ifname, &netdev);
1191 if (r < 0 && r != -ENOENT)
1192 return r;
1193
170e88c8 1194 r = link_get_network(link, &network);
cb71e9c6 1195 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1196 return r;
1197
fb961119
YW		 1198 if (link->state != LINK_STATE_UNMANAGED && !network)
1199 /* If link is in initialized state, then link->network is also NULL. */
1200 force = true;
1201
99b8517c 1202 if (link->network == network && !force)
ad932b15
YW		 1203 return 0;
1204
fb961119
YW		 1205 if (network) {
1206 if (link->state == LINK_STATE_INITIALIZED)
1207 log_link_info(link, "Configuring with %s.", network->filename);
1208 else
1209 log_link_info(link, "Reconfiguring with %s.", network->filename);
1210 } else
1211 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1212 "Unmanaging interface.");
ad932b15
YW		 1213
1214 /* Dropping old .network file */
2a99eed0 1215 r = link_stop_engines(link, false);
572b21d9 1216 if (r < 0)
ad932b15 1217 return r;
ad932b15 1218
19d9a5ad
YW		 1219 link_drop_requests(link);
1220
81db4f3d 1221 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1222 /* When a new/updated .network file is assigned, first make all configs (addresses,
1223 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1224 * link_drop_foreign_config() in link_configure().
1225 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1226 * here we need to drop the configs such as addresses, routes, and so on configured by
1227 * the previously assigned .network file. */
b4564f4e
YW		 1228 link_foreignize_config(link);
1229 else {
a0e99a37
YW		 1230 /* Remove all managed configs. Note, foreign configs are removed in later by
1231 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1232 r = link_drop_managed_config(link);
b4564f4e
YW		 1233 if (r < 0)
1234 return r;
1235 }
ad932b15 1236
3cf58ef3
YW		 1237 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1238 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1239 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1240 * map here, as it depends on .network files assigned to other links. */
1241 link_free_bound_to_list(link);
1242
ad932b15
YW		 1243 link_free_engines(link);
1244 link->network = network_unref(link->network);
1245
9aa2585e
YW		 1246 netdev_unref(link->netdev);
1247 link->netdev = netdev_ref(netdev);
1248
cb71e9c6
YW		 1249 if (!network) {
1250 link_set_state(link, LINK_STATE_UNMANAGED);
1251 return 0;
1252 }
1253
ad932b15 1254 /* Then, apply new .network file */
9092113d 1255 link->network = network_ref(network);
b156a95d 1256 link_update_operstate(link, true);
9092113d 1257 link_dirty(link);
ad932b15 1258
ad932b15 1259 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1260 link->activated = false;
ad932b15 1261
ad932b15
YW		 1262 r = link_configure(link);
1263 if (r < 0)
1264 return r;
1265
0e397560 1266 return 1;
ad932b15
YW		 1267}
1268
96f5f9ef 1269static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1270 int r;
1271
d09a179e
YW		 1272 assert(link);
1273
5a1860f7
YW		 1274 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1275 if (r <= 0)
1276 return r;
1277
7f80fa12 1278 r = link_reconfigure_impl(link, force);
d09a179e 1279 if (r < 0) {
572b21d9 1280 link_enter_failed(link);
d09a179e
YW		 1281 return 0;
1282 }
572b21d9 1283
d09a179e 1284 return r;
572b21d9
YW		 1285}
1286
5a1860f7 1287static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1288 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1289}
572b21d9 1290
5a1860f7 1291static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1292 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1293}
1294
a39a9ac8 1295int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1296 int r;
1297
1298 assert(link);
d09a179e 1299
8bceafa7 1300 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1301 * the function from being called multiple times simultaneously, refuse to reconfigure the
1302 * interface in these cases. */
8bceafa7 1303 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1304 return 0; /* 0 means no-op. */
2c0d7ed3 1305
a39a9ac8 1306 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1307 if (r < 0)
1308 return r;
1309
8bceafa7 1310 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1311}
1312
e6bf7774 1313static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1314 int r;
1315
1316 assert(link);
505f8da7
TG		 1317 assert(link->manager);
1318
faa2e64f
YW		 1319 if (link->manager->test_mode) {
1320 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1321 link_set_state(link, LINK_STATE_UNMANAGED);
1322 return 0;
1323 }
1324
40695457
YW		 1325 if (link->state == LINK_STATE_PENDING) {
1326 log_link_debug(link, "Link state is up-to-date");
1327 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1328
40695457
YW		 1329 r = link_new_bound_by_list(link);
1330 if (r < 0)
1331 return r;
0d4ad91d 1332
40695457
YW		 1333 r = link_handle_bound_by_list(link);
1334 if (r < 0)
1335 return r;
1336 }
0d4ad91d 1337
fb961119 1338 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1339}
1340
302a796f 1341static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1342 int r;
1343
5a1860f7
YW		 1344 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1345 if (r <= 0)
0b54c870 1346 return r;
572b21d9 1347
4ff296b0
YW		 1348 r = link_initialized_and_synced(link);
1349 if (r < 0)
1350 link_enter_failed(link);
5a1860f7
YW		 1351
1352 return 0;
e6bf7774
YW		 1353}
1354
3be9d62a 1355static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1356 int r;
1357
4f561e8e 1358 assert(link);
4f561e8e
TG		 1359 assert(device);
1360
160203e9
YW		 1361 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1362 * or sysattrs) may be outdated. */
8de56fb3 1363 device_unref_and_replace(link->dev, device);
4f561e8e 1364
3b1dbdf0
YW		 1365 if (link->dhcp_client) {
1366 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1367 if (r < 0)
1368 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1369 }
1370
1371 if (link->dhcp6_client) {
1372 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1373 if (r < 0)
1374 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1375 }
1376
b0ff6dea
YW		 1377 r = link_set_sr_iov_ifindices(link);
1378 if (r < 0)
1379 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1380
40695457
YW		 1381 if (link->state != LINK_STATE_PENDING)
1382 return link_reconfigure(link, /* force = */ false);
679b3605 1383
79008bdd 1384 log_link_debug(link, "udev initialized link");
4f561e8e 1385
3c9b8860
TG		 1386 /* udev has initialized the link, but we don't know if we have yet
1387 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1388 * when it returns we know that the pending NEWLINKs have already been
1389 * processed and that we are up-to-date */
4f561e8e 1390
5a1860f7 1391 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1392}
1393
0d411b7f 1394static int link_check_initialized(Link *link) {
51517f9e 1395 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1396 int r;
505f8da7 1397
0d411b7f 1398 assert(link);
505f8da7 1399
82f52245 1400 if (!udev_available())
0d411b7f 1401 return link_initialized_and_synced(link);
852a3916
YW		 1402
1403 /* udev should be around */
0ac655a6 1404 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1405 if (r < 0) {
1406 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1407 return 0;
1408 }
1409
1410 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1411 if (r < 0)
1412 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1413 if (r == 0) {
1414 /* not yet ready */
1415 log_link_debug(link, "link pending udev initialization...");
1416 return 0;
1417 }
1418
1419 r = device_is_renaming(device);
0d411b7f
YW		 1420 if (r < 0)
1421 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1422 if (r > 0) {
1423 log_link_debug(link, "Interface is being renamed, pending initialization.");
1424 return 0;
4f561e8e 1425 }
505f8da7 1426
0d411b7f 1427 return link_initialized(link, device);
a748b692
TG		 1428}
1429
1fd3ac1e 1430int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1431 int r, ifindex;
1fd3ac1e 1432 Link *link;
3be9d62a
YW		 1433
1434 assert(m);
1435 assert(device);
1436
3be9d62a 1437 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1438 if (r < 0)
1439 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1440
75255a8d
YW		 1441 r = link_get_by_index(m, ifindex, &link);
1442 if (r < 0) {
1443 /* This error is not critical, as the corresponding rtnl message may be received later. */
1444 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1445 return 0;
1446 }
1447
1448 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1449 * object here. It will be removed only when rtnetlink says so. */
1450 if (action == SD_DEVICE_REMOVE) {
1451 link->dev = sd_device_unref(link->dev);
1452 return 0;
1453 }
1454
3be9d62a 1455 r = device_is_renaming(device);
1fd3ac1e
YW		 1456 if (r < 0)
1457 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1458 if (r > 0) {
1fd3ac1e 1459 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1460 /* TODO:
1461 * What happens when a device is initialized, then soon renamed after that? When we detect
1462 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1463 return 0;
1464 }
1465
4b9a8c2b
YW		 1466 r = link_initialized(link, device);
1467 if (r < 0)
1468 link_enter_failed(link);
3be9d62a
YW		 1469
1470 return 0;
1471}
1472
9c0a72f9 1473static int link_carrier_gained(Link *link) {
6706ce2f 1474 bool force_reconfigure;
9c0a72f9
TG		 1475 int r;
1476
1477 assert(link);
1478
6706ce2f
YW		 1479 r = event_source_disable(link->carrier_lost_timer);
1480 if (r < 0)
1481 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1482
d9910948
YW		 1483 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1484 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1485 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1486 * restarted, and the correct network information will be gained.
1487 *
1488 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1489 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1490 * already assigned to the interface (in that case, the .network file does not have the SSID=
1491 * setting in the [Match] section), and the interface is already being configured. Of course,
1492 * there may exist another .network file with higher priority and a matching SSID= setting. But
1493 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1494 *
6706ce2f 1495 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1496 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1497 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1498 link->previous_ssid = mfree(link->previous_ssid);
1499
986b2514
AŠ		 1500 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1501 * profile wants to match on it with SSID= in its [Match] section.
1502 */
1503 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1504 r = link_get_wlan_interface(link);
1505 if (r < 0)
1506 return r;
1507 }
1508
081466bd
YW		 1509 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1510 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1511 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1512 r = link_reconfigure_impl(link, force_reconfigure);
1513 if (r != 0)
1514 return r;
b7ac1284 1515
aa9117c0
YW		 1516 r = link_handle_bound_by_list(link);
1517 if (r < 0)
1518 return r;
1519
600b7898
YW		 1520 if (link->iftype == ARPHRD_CAN)
1521 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1522 return 0;
600b7898 1523
b9ea3d2e 1524 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1525 r = link_acquire_dynamic_conf(link);
f0269653 1526 if (r < 0)
9c0a72f9 1527 return r;
6fc25497 1528
97108953 1529 r = link_request_static_configs(link);
6fc25497
SS		 1530 if (r < 0)
1531 return r;
9c0a72f9
TG		 1532 }
1533
aa9117c0 1534 return 0;
9c0a72f9
TG		 1535}
1536
6706ce2f
YW		 1537static int link_carrier_lost_impl(Link *link) {
1538 int r, ret = 0;
1539
1540 assert(link);
1541
1542 link->previous_ssid = mfree(link->previous_ssid);
1543
1544 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1545 return 0;
1546
1547 if (!link->network)
1548 return 0;
1549
1550 r = link_stop_engines(link, false);
1551 if (r < 0)
1552 ret = r;
1553
a0e99a37 1554 r = link_drop_managed_config(link);
6706ce2f
YW		 1555 if (r < 0 && ret >= 0)
1556 ret = r;
1557
1558 return ret;
1559}
1560
1561static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1562 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1563 int r;
1564
6706ce2f
YW		 1565 r = link_carrier_lost_impl(link);
1566 if (r < 0) {
1567 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1568 link_enter_failed(link);
1569 }
1570
1571 return 0;
1572}
1573
9c0a72f9 1574static int link_carrier_lost(Link *link) {
b7326069
YW		 1575 uint16_t dhcp_mtu;
1576 usec_t usec;
9c0a72f9
TG		 1577 int r;
1578
1579 assert(link);
1580
aa9117c0
YW		 1581 r = link_handle_bound_by_list(link);
1582 if (r < 0)
1583 return r;
93b4dab5 1584
600b7898
YW		 1585 if (link->iftype == ARPHRD_CAN)
1586 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1587 return 0;
1588
f1c22cf4
YW		 1589 if (!link->network)
1590 return 0;
1591
b7326069
YW		 1592 if (link->network->ignore_carrier_loss_set)
1593 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1594 usec = link->network->ignore_carrier_loss_usec;
1595
1596 else if (link->network->bond && link->wlan_iftype > 0)
1597 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1598 * carrier to be lost. See #19832. */
1599 usec = 3 * USEC_PER_SEC;
1600
1601 else if (link->network->dhcp_use_mtu &&
1602 link->dhcp_lease &&
1603 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1604 dhcp_mtu != link->original_mtu)
1605 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1606 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1607 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1608 usec = 5 * USEC_PER_SEC;
1609
1610 else
1611 /* Otherwise, use the currently set value. */
1612 usec = link->network->ignore_carrier_loss_usec;
1613
1614 if (usec == USEC_INFINITY)
aa9117c0 1615 return 0;
600b7898 1616
b7326069 1617 if (usec == 0)
6706ce2f
YW		 1618 return link_carrier_lost_impl(link);
1619
1620 return event_reset_time_relative(link->manager->event,
1621 &link->carrier_lost_timer,
ba4e0427 1622 CLOCK_BOOTTIME,
b7326069 1623 usec,
6706ce2f
YW		 1624 0,
1625 link_carrier_lost_handler,
1626 link,
1627 0,
1628 "link-carrier-loss",
1629 true);
0c9ee5d5
YW		 1630}
1631
0c9ee5d5
YW		 1632static int link_admin_state_up(Link *link) {
1633 int r;
1634
1635 assert(link);
1636
1637 /* This is called every time an interface admin state changes to up;
1638 * specifically, when IFF_UP flag changes from unset to set. */
1639
1640 if (!link->network)
1641 return 0;
1642
899b0e5e 1643 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1644 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1645 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1646 }
1647
1648 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1649 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1650 r = link_set_ipv6_mtu(link);
1651 if (r < 0)
1652 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1653
1654 return 0;
1655}
1656
1657static int link_admin_state_down(Link *link) {
1658 assert(link);
1659
1660 if (!link->network)
1661 return 0;
1662
899b0e5e 1663 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1664 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1665 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1666 }
1667
1668 return 0;
1669}
1670
0c9ee5d5
YW		 1671static bool link_is_enslaved(Link *link) {
1672 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1673 return true;
1674
1f024462 1675 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1676 return true;
1677
0c9ee5d5
YW		 1678 return false;
1679}
1680
1681static LinkAddressState address_state_from_scope(uint8_t scope) {
1682 if (scope < RT_SCOPE_SITE)
1683 /* universally accessible addresses found */
1684 return LINK_ADDRESS_STATE_ROUTABLE;
1685
1686 if (scope < RT_SCOPE_HOST)
1687 /* only link or site local addresses found */
1688 return LINK_ADDRESS_STATE_DEGRADED;
1689
1690 /* no useful addresses found */
1691 return LINK_ADDRESS_STATE_OFF;
1692}
1693
1694void link_update_operstate(Link *link, bool also_update_master) {
1695 LinkOperationalState operstate;
1696 LinkCarrierState carrier_state;
1697 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1698 LinkOnlineState online_state;
1699 _cleanup_strv_free_ char **p = NULL;
1700 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1701 bool changed = false;
1702 Address *address;
1703
1704 assert(link);
1705
1706 if (link->kernel_operstate == IF_OPER_DORMANT)
1707 carrier_state = LINK_CARRIER_STATE_DORMANT;
1708 else if (link_has_carrier(link)) {
1709 if (link_is_enslaved(link))
1710 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1711 else
1712 carrier_state = LINK_CARRIER_STATE_CARRIER;
1713 } else if (link->flags & IFF_UP)
1714 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1715 else
1716 carrier_state = LINK_CARRIER_STATE_OFF;
1717
1718 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1719 Link *slave;
1720
1721 SET_FOREACH(slave, link->slaves) {
1722 link_update_operstate(slave, false);
1723
1724 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1725 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1726 }
1727 }
1728
1729 SET_FOREACH(address, link->addresses) {
1730 if (!address_is_ready(address))
1731 continue;
1732
1733 if (address->family == AF_INET)
1734 ipv4_scope = MIN(ipv4_scope, address->scope);
1735
1736 if (address->family == AF_INET6)
1737 ipv6_scope = MIN(ipv6_scope, address->scope);
1738 }
1739
0c9ee5d5
YW		 1740 ipv4_address_state = address_state_from_scope(ipv4_scope);
1741 ipv6_address_state = address_state_from_scope(ipv6_scope);
1742 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1743
1744 /* Mapping of address and carrier state vs operational state
1745 * carrier state
1746 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1747 * ------------------------------------------------------------------------------
1748 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1749 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1750 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1751 */
1752
1753 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1754 operstate = (LinkOperationalState) carrier_state;
1755 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1756 operstate = LINK_OPERSTATE_ROUTABLE;
1757 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1758 operstate = LINK_OPERSTATE_DEGRADED;
1759 else
1760 operstate = LINK_OPERSTATE_ENSLAVED;
1761
1762 /* Only determine online state for managed links with RequiredForOnline=yes */
1763 if (!link->network || !link->network->required_for_online)
1764 online_state = _LINK_ONLINE_STATE_INVALID;
1765 else if (operstate < link->network->required_operstate_for_online.min ||
1766 operstate > link->network->required_operstate_for_online.max)
1767 online_state = LINK_ONLINE_STATE_OFFLINE;
1768 else {
1769 AddressFamily required_family = link->network->required_family_for_online;
1770 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1771 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1772
1773 /* The operational state is within the range required for online.
1774 * If a particular address family is also required, we might revert
1775 * to offline in the blocks below. */
1776 online_state = LINK_ONLINE_STATE_ONLINE;
1777
1778 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1779 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1780 online_state = LINK_ONLINE_STATE_OFFLINE;
1781 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1782 online_state = LINK_ONLINE_STATE_OFFLINE;
1783 }
1784
1785 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1786 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1787 online_state = LINK_ONLINE_STATE_OFFLINE;
1788 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1789 online_state = LINK_ONLINE_STATE_OFFLINE;
1790 }
1791 }
1792
1793 if (link->carrier_state != carrier_state) {
1794 link->carrier_state = carrier_state;
1795 changed = true;
1796 if (strv_extend(&p, "CarrierState") < 0)
1797 log_oom();
1798 }
1799
1800 if (link->address_state != address_state) {
1801 link->address_state = address_state;
1802 changed = true;
1803 if (strv_extend(&p, "AddressState") < 0)
1804 log_oom();
1805 }
0d4ad91d 1806
0c9ee5d5
YW		 1807 if (link->ipv4_address_state != ipv4_address_state) {
1808 link->ipv4_address_state = ipv4_address_state;
1809 changed = true;
1810 if (strv_extend(&p, "IPv4AddressState") < 0)
1811 log_oom();
1812 }
9c0a72f9 1813
0c9ee5d5
YW		 1814 if (link->ipv6_address_state != ipv6_address_state) {
1815 link->ipv6_address_state = ipv6_address_state;
1816 changed = true;
1817 if (strv_extend(&p, "IPv6AddressState") < 0)
1818 log_oom();
1819 }
9c0a72f9 1820
0c9ee5d5
YW		 1821 if (link->operstate != operstate) {
1822 link->operstate = operstate;
1823 changed = true;
1824 if (strv_extend(&p, "OperationalState") < 0)
1825 log_oom();
1826 }
9c0a72f9 1827
0c9ee5d5
YW		 1828 if (link->online_state != online_state) {
1829 link->online_state = online_state;
1830 changed = true;
1831 if (strv_extend(&p, "OnlineState") < 0)
1832 log_oom();
1833 }
9c0a72f9 1834
0c9ee5d5
YW		 1835 if (p)
1836 link_send_changed_strv(link, p);
1837 if (changed)
1838 link_dirty(link);
9c0a72f9 1839
0c9ee5d5
YW		 1840 if (also_update_master) {
1841 Link *master;
9c0a72f9 1842
0c9ee5d5
YW		 1843 if (link_get_master(link, &master) >= 0)
1844 link_update_operstate(master, true);
1845 }
9c0a72f9
TG		 1846}
1847
0c9ee5d5
YW		 1848#define FLAG_STRING(string, flag, old, new) \
1849 (((old ^ new) & flag) \
1850 ? ((old & flag) ? (" -" string) : (" +" string)) \
1851 : "")
1852
0d411b7f 1853static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1854 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1855 uint8_t operstate;
1856 unsigned flags;
d236718c
DS		 1857 int r;
1858
61135582 1859 assert(link);
0d411b7f 1860 assert(message);
61135582 1861
0d411b7f 1862 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1863 if (r < 0)
0d411b7f 1864 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1865
0d411b7f
YW		 1866 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1867 if (r == -ENODATA)
1868 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1869 operstate = link->kernel_operstate;
0d411b7f
YW		 1870 else if (r < 0)
1871 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1872
0d411b7f 1873 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1874 return 0;
1875
0c9ee5d5
YW		 1876 if (link->flags != flags) {
1877 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1878
0c9ee5d5
YW		 1879 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",
1880 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1881 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1882 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1883 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1884 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1885 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1886 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1887 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1888 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1889 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1890 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1891 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1892 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1893 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1894 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1895 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1896 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1897 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1898 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1899
0c9ee5d5
YW		 1900 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1901 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1902 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1903 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1904 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1905 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1906 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1907 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1908
0c9ee5d5
YW		 1909 if (unknown_flags_added)
1910 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1911
0c9ee5d5
YW		 1912 if (unknown_flags_removed)
1913 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1914 }
61135582 1915
0d411b7f
YW		 1916 link_was_admin_up = link->flags & IFF_UP;
1917 had_carrier = link_has_carrier(link);
1918
0c9ee5d5
YW		 1919 link->flags = flags;
1920 link->kernel_operstate = operstate;
36161cba 1921
0c9ee5d5 1922 link_update_operstate(link, true);
61135582 1923
0d411b7f
YW		 1924 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1925 log_link_info(link, "Link UP");
22936833 1926
0d411b7f
YW		 1927 r = link_admin_state_up(link);
1928 if (r < 0)
1929 return r;
1930 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1931 log_link_info(link, "Link DOWN");
0d4ad91d 1932
0d411b7f 1933 r = link_admin_state_down(link);
0d4ad91d
AR		 1934 if (r < 0)
1935 return r;
7619683b
TG		 1936 }
1937
0d411b7f
YW		 1938 if (!had_carrier && link_has_carrier(link)) {
1939 log_link_info(link, "Gained carrier");
0d4ad91d 1940
0d411b7f 1941 r = link_carrier_gained(link);
30de2b89
YW		 1942 if (r < 0)
1943 return r;
0d411b7f
YW		 1944 } else if (had_carrier && !link_has_carrier(link)) {
1945 log_link_info(link, "Lost carrier");
1946
1947 r = link_carrier_lost(link);
0b54c870
YW		 1948 if (r < 0)
1949 return r;
b8941f74
TG		 1950 }
1951
0d411b7f
YW		 1952 return 0;
1953}
afe7fd56 1954
0d411b7f
YW		 1955static int link_update_master(Link *link, sd_netlink_message *message) {
1956 int master_ifindex, r;
7465dd22 1957
0d411b7f
YW		 1958 assert(link);
1959 assert(message);
69629de9 1960
0d411b7f
YW		 1961 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1962 if (r == -ENODATA)
1963 return 0;
1964 if (r < 0)
1965 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1966
571bf1aa
YW		 1967 if (master_ifindex == link->ifindex)
1968 master_ifindex = 0;
1969
0d411b7f
YW		 1970 if (master_ifindex == link->master_ifindex)
1971 return 0;
807667f7 1972
0d411b7f 1973 if (link->master_ifindex == 0)
8458ca26 1974 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 1975 else if (master_ifindex == 0)
8458ca26 1976 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 1977 else
e2341b6b
DT		 1978 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
1979 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 1980
0d411b7f 1981 link_drop_from_master(link);
807667f7 1982
0d411b7f 1983 link->master_ifindex = master_ifindex;
413708d1 1984
0d411b7f
YW		 1985 r = link_append_to_master(link);
1986 if (r < 0)
1987 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 1988
0d411b7f
YW		 1989 return 0;
1990}
807667f7 1991
e1658632
YW		 1992static int link_update_driver(Link *link, sd_netlink_message *message) {
1993 int r;
1994
1995 assert(link);
1996 assert(link->manager);
1997 assert(message);
1998
1999 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2000 if (link->ethtool_driver_read)
e1658632
YW		 2001 return 0;
2002
2003 /* When udevd is running, read the driver after the interface is initialized by udevd.
2004 * Otherwise, ethtool may not work correctly. See issue #22538.
2005 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2006 if (udev_available() && !link->dev)
e1658632
YW		 2007 return 0;
2008
6625c39e
YW		 2009 link->ethtool_driver_read = true;
2010
e1658632
YW		 2011 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2012 if (r < 0) {
2013 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2014 return 0;
2015 }
2016
2017 log_link_debug(link, "Found driver: %s", strna(link->driver));
2018
2019 if (streq_ptr(link->driver, "dsa")) {
2020 uint32_t dsa_master_ifindex = 0;
2021
2022 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2023 if (r < 0 && r != -ENODATA)
2024 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2025
2026 if (dsa_master_ifindex > INT_MAX) {
2027 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2028 dsa_master_ifindex);
2029 dsa_master_ifindex = 0;
2030 }
2031
2032 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2033 }
2034
40695457 2035 return 1; /* needs reconfigure */
e1658632
YW		 2036}
2037
6625c39e 2038static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2039 int r;
2040
2041 assert(link);
2042 assert(link->manager);
2043 assert(message);
2044
6625c39e 2045 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2046 return 0;
2047
2048 /* When udevd is running, read the permanent hardware address after the interface is
2049 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2050 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2051 if (udev_available() && !link->dev)
2052 return 0;
2053
2054 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2055 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2056 if (r == -ENODATA)
2057 return 0;
2058 if (r < 0)
2059 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2060
2061 link->ethtool_permanent_hw_addr_read = true;
2062
2063 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2064 if (r < 0)
2065 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2066
2067 return 0;
2068}
2069
2070static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2071 int r;
2072
2073 assert(link);
2074 assert(link->manager);
2075 assert(message);
2076
2077 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2078 return 0;
2079
2080 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2081 if (r < 0) {
2082 if (r != -ENODATA)
2083 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2084
6625c39e
YW		 2085 /* Fallback to ethtool for older kernels. */
2086 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2087 if (r < 0)
2088 return r;
e1658632
YW		 2089 }
2090
2091 if (link->permanent_hw_addr.length > 0)
2092 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2093
40695457 2094 return 1; /* needs reconfigure */
e1658632
YW		 2095}
2096
0d411b7f 2097static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2098 struct hw_addr_data addr;
0d411b7f 2099 int r;
d93d655c 2100
0d411b7f
YW		 2101 assert(link);
2102 assert(message);
dfc58b47 2103
0d411b7f
YW		 2104 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2105 if (r < 0 && r != -ENODATA)
2106 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2107
e2bacccd 2108 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2109 if (r == -ENODATA)
2110 return 0;
2111 if (r < 0)
fe321d45 2112 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2113
e2bacccd 2114 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2115 return 0;
a61bb41c 2116
de0f1579 2117 if (link->hw_addr.length == 0)
e2bacccd 2118 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2119 else {
e2341b6b
DT		 2120 log_link_debug(link, "Hardware address is changed: %s %s %s",
2121 HW_ADDR_TO_STR(&link->hw_addr),
2122 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2123 HW_ADDR_TO_STR(&addr));
0d411b7f 2124
e74f1d07 2125 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2126 }
2127
e2bacccd
YW		 2128 link->hw_addr = addr;
2129
fe321d45
YW		 2130 if (!hw_addr_is_null(&link->hw_addr)) {
2131 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2132 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2133 /* bonding master and its slaves have the same hardware address. */
2134 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2135 if (r < 0)
2136 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2137 }
0d411b7f 2138
0a14f83a 2139 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2140 if (r < 0)
2141 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2142
0d411b7f 2143 r = ipv4ll_update_mac(link);
a61bb41c 2144 if (r < 0)
0d411b7f 2145 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2146
0d411b7f
YW		 2147 r = dhcp4_update_mac(link);
2148 if (r < 0)
2149 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2150
0d411b7f
YW		 2151 r = dhcp6_update_mac(link);
2152 if (r < 0)
2153 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2154
2155 r = radv_update_mac(link);
2156 if (r < 0)
2157 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2158
3be64aa4 2159 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2160 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2161 if (r < 0)
0d411b7f
YW		 2162 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2163 }
d236718c 2164
35778343
YW		 2165 if (link->lldp_rx) {
2166 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2167 if (r < 0)
c01b9b87
YW		 2168 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2169 }
2170
2171 if (link->lldp_tx) {
2172 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2173 if (r < 0)
2174 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2175 }
2176
40695457 2177 return 1; /* needs reconfigure */
0d411b7f 2178}
a61bb41c 2179
0d411b7f 2180static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2181 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2182 int r;
a61bb41c 2183
0d411b7f
YW		 2184 assert(link);
2185 assert(message);
2186
2187 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2188 if (r == -ENODATA)
2189 return 0;
2190 if (r < 0)
2191 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2192 if (mtu == 0)
2193 return 0;
0d411b7f 2194
717ba5fc
YW		 2195 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2196 if (r < 0 && r != -ENODATA)
2197 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2198
2199 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2200 if (r < 0 && r != -ENODATA)
2201 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2202
717ba5fc
YW		 2203 if (max_mtu == 0)
2204 max_mtu = UINT32_MAX;
2205
2206 link->min_mtu = min_mtu;
2207 link->max_mtu = max_mtu;
2208
0d411b7f
YW		 2209 if (link->original_mtu == 0) {
2210 link->original_mtu = mtu;
717ba5fc
YW		 2211 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2212 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2213 }
2214
717ba5fc
YW		 2215 if (link->mtu == mtu)
2216 return 0;
2217
b5d0fd1e 2218 if (link->mtu != 0)
e2341b6b
DT		 2219 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2220 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2221 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2222
2223 link->mtu = mtu;
2224
2225 if (link->dhcp_client) {
2226 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2227 if (r < 0)
0d411b7f
YW		 2228 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2229 }
a61bb41c 2230
0d411b7f
YW		 2231 if (link->radv) {
2232 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2233 if (r < 0)
0d411b7f 2234 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2235 }
2236
2237 return 0;
dd3efc09 2238}
fe8db0c5 2239
0d411b7f
YW		 2240static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2241 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2242 int r;
2243
2244 assert(link);
2245 assert(message);
2246
2247 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2248 if (r == -ENODATA)
2368ff81 2249 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2250 * interface has no alternative name. */
2251 return 0;
2252 if (r < 0)
0d411b7f
YW		 2253 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2254
1b345c1e
YW		 2255 if (strv_equal(altnames, link->alternative_names))
2256 return 0;
2257
0d411b7f
YW		 2258 STRV_FOREACH(n, link->alternative_names)
2259 hashmap_remove(link->manager->links_by_name, *n);
2260
2261 strv_free_and_replace(link->alternative_names, altnames);
2262
2263 STRV_FOREACH(n, link->alternative_names) {
2264 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2265 if (r < 0)
2266 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2267 }
2268
40695457 2269 return 1; /* needs reconfigure */
0d411b7f
YW		 2270}
2271
2272static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2273 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2274 const char *ifname;
2275 int r;
2276
2277 assert(link);
2278 assert(message);
2279
2280 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2281 if (r == -ENODATA)
7802194a 2282 /* Hmm?? But ok. */
0d411b7f
YW		 2283 return 0;
2284 if (r < 0)
2285 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2286
2287 if (streq(ifname, link->ifname))
2288 return 0;
2289
01afd0f7
YW		 2290 r = format_ifname(link->ifindex, ifname_from_index);
2291 if (r < 0)
2292 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2293
2294 if (!streq(ifname, ifname_from_index)) {
2295 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2296 "with the name currently configured on the actual interface '%s'. Ignoring.",
2297 ifname, ifname_from_index);
2298 return 0;
2299 }
2300
0d411b7f
YW		 2301 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2302
2303 hashmap_remove(link->manager->links_by_name, link->ifname);
2304
2305 r = free_and_strdup(&link->ifname, ifname);
2306 if (r < 0)
2307 return log_oom_debug();
2308
2309 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2310 if (r < 0)
2311 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2312
54d1fdb2
YW		 2313 if (link->dhcp_client) {
2314 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2315 if (r < 0)
2316 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2317 }
2318
2319 if (link->dhcp6_client) {
2320 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2321 if (r < 0)
2322 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2323 }
2324
2325 if (link->ndisc) {
2326 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2327 if (r < 0)
2328 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2329 }
2330
2331 if (link->dhcp_server) {
2332 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2333 if (r < 0)
2334 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2335 }
2336
2337 if (link->radv) {
2338 r = sd_radv_set_ifname(link->radv, link->ifname);
2339 if (r < 0)
2340 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2341 }
2342
35778343
YW		 2343 if (link->lldp_rx) {
2344 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2345 if (r < 0)
c01b9b87
YW		 2346 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2347 }
2348
2349 if (link->lldp_tx) {
2350 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2351 if (r < 0)
2352 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2353 }
2354
2355 if (link->ipv4ll) {
2356 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2357 if (r < 0)
2358 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2359 }
2360
86173383
YW		 2361 r = ipv4acd_set_ifname(link);
2362 if (r < 0)
2363 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2364
40695457 2365 return 1; /* needs reconfigure */
0d411b7f
YW		 2366}
2367
2368static int link_update(Link *link, sd_netlink_message *message) {
40695457 2369 bool needs_reconfigure = false;
0d411b7f
YW		 2370 int r;
2371
2372 assert(link);
2373 assert(message);
2374
2375 r = link_update_name(link, message);
2376 if (r < 0)
2377 return r;
40695457 2378 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2379
2380 r = link_update_alternative_names(link, message);
2381 if (r < 0)
2382 return r;
40695457 2383 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2384
2385 r = link_update_mtu(link, message);
2386 if (r < 0)
2387 return r;
2388
e1658632
YW		 2389 r = link_update_driver(link, message);
2390 if (r < 0)
2391 return r;
40695457 2392 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2393
2394 r = link_update_permanent_hardware_address(link, message);
2395 if (r < 0)
2396 return r;
40695457 2397 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2398
0d411b7f
YW		 2399 r = link_update_hardware_address(link, message);
2400 if (r < 0)
2401 return r;
40695457 2402 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2403
2404 r = link_update_master(link, message);
2405 if (r < 0)
2406 return r;
2407
7d0d832d
YW		 2408 r = link_update_ipv6ll_addrgen_mode(link, message);
2409 if (r < 0)
2410 return r;
2411
40695457
YW		 2412 r = link_update_flags(link, message);
2413 if (r < 0)
2414 return r;
2415
2416 return needs_reconfigure;
0d411b7f
YW		 2417}
2418
0c9ee5d5
YW		 2419static Link *link_drop_or_unref(Link *link) {
2420 if (!link)
2421 return NULL;
2422 if (!link->manager)
2423 return link_unref(link);
2424 return link_drop(link);
2425}
2426
2427DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2428
2429static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2430 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2431 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2432 unsigned short iftype;
2433 int r, ifindex;
0c9ee5d5
YW		 2434
2435 assert(manager);
2436 assert(message);
2437 assert(ret);
2438
0c9ee5d5
YW		 2439 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2440 if (r < 0)
0d411b7f 2441 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2442 else if (ifindex <= 0)
0d411b7f 2443 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2444
2445 r = sd_rtnl_message_link_get_type(message, &iftype);
2446 if (r < 0)
0d411b7f 2447 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2448
2449 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2450 if (r < 0)
0d411b7f 2451 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2452
2453 /* check for link kind */
2454 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2455 if (r >= 0) {
0d411b7f
YW		 2456 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2457 if (r < 0 && r != -ENODATA)
2458 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2459 r = sd_netlink_message_exit_container(message);
2460 if (r < 0)
0d411b7f 2461 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2462 }
2463
4c78dc17
YW		 2464 if (!manager->test_mode) {
2465 /* Do not update state files when running in test mode. */
2466 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2467 return log_oom_debug();
0d411b7f 2468
4c78dc17
YW		 2469 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2470 return log_oom_debug();
0d411b7f 2471
4c78dc17
YW		 2472 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2473 return log_oom_debug();
2474 }
0d411b7f 2475
0c9ee5d5
YW		 2476 link = new(Link, 1);
2477 if (!link)
2478 return -ENOMEM;
2479
2480 *link = (Link) {
2481 .n_ref = 1,
2482 .state = LINK_STATE_PENDING,
2483 .online_state = _LINK_ONLINE_STATE_INVALID,
2484 .ifindex = ifindex,
2485 .iftype = iftype,
2486 .ifname = TAKE_PTR(ifname),
2487 .kind = TAKE_PTR(kind),
2488
7d0d832d
YW		 2489 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2490
0d411b7f
YW		 2491 .state_file = TAKE_PTR(state_file),
2492 .lease_file = TAKE_PTR(lease_file),
2493 .lldp_file = TAKE_PTR(lldp_file),
2494
0c9ee5d5
YW		 2495 .n_dns = UINT_MAX,
2496 .dns_default_route = -1,
2497 .llmnr = _RESOLVE_SUPPORT_INVALID,
2498 .mdns = _RESOLVE_SUPPORT_INVALID,
2499 .dnssec_mode = _DNSSEC_MODE_INVALID,
2500 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2501 };
2502
6eab614d 2503 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2504 if (r < 0)
0d411b7f 2505 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2506
2507 link->manager = manager;
2508
0d411b7f 2509 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2510 if (r < 0)
0d411b7f 2511 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2512
8a77e245
YW		 2513 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2514 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2515
9c5b8d46
AŠ		 2516 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2517 * message arrived too early. Request the wireless link information again.
2518 */
2519 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2520 r = link_get_wlan_interface(link);
2521 if (r < 0)
2522 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2523 }
2524
0c9ee5d5 2525 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2526 return 0;
2527}
2528
0d411b7f 2529int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2530 Link *link = NULL;
2531 NetDev *netdev = NULL;
2532 uint16_t type;
2533 const char *name;
2534 int r, ifindex;
2535
2536 assert(rtnl);
2537 assert(message);
0d411b7f 2538 assert(manager);
3be9d62a
YW		 2539
2540 if (sd_netlink_message_is_error(message)) {
2541 r = sd_netlink_message_get_errno(message);
2542 if (r < 0)
2543 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2544
2545 return 0;
2546 }
2547
2548 r = sd_netlink_message_get_type(message, &type);
2549 if (r < 0) {
2550 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2551 return 0;
2552 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2553 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2554 return 0;
2555 }
2556
2557 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2558 if (r < 0) {
2559 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2560 return 0;
2561 } else if (ifindex <= 0) {
2562 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2563 return 0;
2564 }
2565
2566 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2567 if (r < 0) {
2568 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2569 return 0;
2570 }
2571
6eab614d 2572 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2573 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2574
2575 switch (type) {
2576 case RTM_NEWLINK:
0d411b7f
YW		 2577 if (netdev) {
2578 /* netdev exists, so make sure the ifindex matches */
2579 r = netdev_set_ifindex(netdev, message);
2580 if (r < 0) {
66141164 2581 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2582 return 0;
2583 }
2584 }
2585
3be9d62a
YW		 2586 if (!link) {
2587 /* link is new, so add it */
0d411b7f 2588 r = link_new(manager, message, &link);
3be9d62a 2589 if (r < 0) {
0d411b7f 2590 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2591 return 0;
2592 }
3be9d62a 2593
0d411b7f 2594 r = link_update(link, message);
3be9d62a 2595 if (r < 0) {
66141164 2596 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2597 link_enter_failed(link);
3be9d62a
YW		 2598 return 0;
2599 }
3be9d62a 2600
0d411b7f
YW		 2601 r = link_check_initialized(link);
2602 if (r < 0) {
66141164 2603 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2604 link_enter_failed(link);
2605 return 0;
2606 }
2607 } else {
2608 r = link_update(link, message);
2609 if (r < 0) {
66141164 2610 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2611 link_enter_failed(link);
2612 return 0;
2613 }
40695457
YW		 2614 if (r > 0) {
2615 r = link_reconfigure_impl(link, /* force = */ false);
2616 if (r < 0) {
2617 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2618 link_enter_failed(link);
2619 return 0;
2620 }
2621 }
3be9d62a 2622 }
3be9d62a
YW		 2623 break;
2624
2625 case RTM_DELLINK:
2626 link_drop(link);
2627 netdev_drop(netdev);
3be9d62a
YW		 2628 break;
2629
2630 default:
04499a70 2631 assert_not_reached();
3be9d62a
YW		 2632 }
2633
2634 return 1;
2635}
2636
79c6e114
YW		 2637int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2638 uint16_t message_type;
2639 int r;
2640
2641 assert(m);
2642 assert(link);
2643 assert(error_msg);
2644
2645 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2646 return 0;
2647
2648 r = sd_netlink_message_get_errno(m);
2649 if (r < 0) {
2650 log_link_message_warning_errno(link, m, r, error_msg);
2651 link_enter_failed(link);
2652 return 0;
2653 }
2654
2655 r = sd_netlink_message_get_type(m, &message_type);
2656 if (r < 0) {
2657 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2658 return 0;
2659 }
2660 if (message_type != RTM_NEWLINK) {
2661 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2662 return 0;
2663 }
2664
2665 r = link_update(link, m);
2666 if (r < 0) {
2667 link_enter_failed(link);
2668 return 0;
2669 }
2670
2671 return 1;
2672}
2673
2674int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2675 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2676 int r;
2677
2678 assert(link);
2679 assert(link->manager);
2680 assert(link->manager->rtnl);
2681 assert(callback);
2682
2683 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2684 if (r < 0)
2685 return r;
2686
2687 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2688 link_netlink_destroy_callback, link);
2689 if (r < 0)
2690 return r;
2691
2692 link_ref(link);
2693 return 0;
2694}
2695
fe8db0c5 2696static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2697 [LINK_STATE_PENDING] = "pending",
bd08ce56 2698 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2699 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2700 [LINK_STATE_CONFIGURED] = "configured",
2701 [LINK_STATE_UNMANAGED] = "unmanaged",
2702 [LINK_STATE_FAILED] = "failed",
2703 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2704};
2705
2706DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2707
2708int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2709 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2710 static const char* map[] = {
2711 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2712 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2713 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2714 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2715 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2716 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2717 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2718 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2719 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2720 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2721 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2722 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2723 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2724 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2725 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2726 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2727 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2728 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2729 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2730 };
2731
2732 assert(ret);
2733
2734 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2735 if (FLAGS_SET(flags, 1 << i) && map[i])
2736 if (!strextend_with_separator(&str, ",", map[i]))
2737 return -ENOMEM;
7ae55b78
YW		 2738
2739 *ret = TAKE_PTR(str);
2740 return 0;
2741}
2742
2743static const char * const kernel_operstate_table[] = {
2744 [IF_OPER_UNKNOWN] = "unknown",
2745 [IF_OPER_NOTPRESENT] = "not-present",
2746 [IF_OPER_DOWN] = "down",
2747 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2748 [IF_OPER_TESTING] = "testing",
2749 [IF_OPER_DORMANT] = "dormant",
2750 [IF_OPER_UP] = "up",
2751};
2752
2753DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
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