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network: do not drop foreign configs based on the previous .network file
[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"
c0267a59 13#include "batadv.h"
737f1405
YW		 14#include "bond.h"
15#include "bridge.h"
1346b1f0 16#include "bus-util.h"
3be9d62a
YW		 17#include "device-private.h"
18#include "device-util.h"
27dfc982 19#include "dhcp-identifier.h"
bd91b83e 20#include "dhcp-lease-internal.h"
686d13b9 21#include "env-file.h"
4bb7cc82 22#include "ethtool-util.h"
3ffd4af2 23#include "fd-util.h"
cf1d700d 24#include "fileio.h"
176b8be1 25#include "format-util.h"
af664001 26#include "fs-util.h"
737f1405 27#include "ipvlan.h"
ef118d00 28#include "missing_network.h"
cf1d700d 29#include "netlink-util.h"
c6f7c917 30#include "network-internal.h"
fb486c90 31#include "networkd-address-label.h"
093e3533 32#include "networkd-address.h"
9671ae9d 33#include "networkd-bridge-fdb.h"
ff9e0783 34#include "networkd-bridge-mdb.h"
3ddcbeea 35#include "networkd-can.h"
8fcf1d61 36#include "networkd-dhcp-server.h"
ca5ad760
YW		 37#include "networkd-dhcp4.h"
38#include "networkd-dhcp6.h"
76a86ffd 39#include "networkd-ipv4acd.h"
ca5ad760 40#include "networkd-ipv4ll.h"
76c5a0f2 41#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 42#include "networkd-link-bus.h"
43#include "networkd-link.h"
8e1ad1ea 44#include "networkd-lldp-tx.h"
23f53b99 45#include "networkd-manager.h"
1e7a0e21 46#include "networkd-ndisc.h"
e4a71bf3 47#include "networkd-neighbor.h"
75156ccb 48#include "networkd-nexthop.h"
19d9a5ad 49#include "networkd-queue.h"
7465dd22 50#include "networkd-radv.h"
bce67bbe 51#include "networkd-routing-policy-rule.h"
0fa8ee6c 52#include "networkd-setlink.h"
19d9a5ad 53#include "networkd-sriov.h"
3b5a4fc6 54#include "networkd-state-file.h"
19d9a5ad 55#include "networkd-sysctl.h"
8d968fdd 56#include "networkd-wifi.h"
cf1d700d
TG		 57#include "set.h"
58#include "socket-util.h"
bf331d87 59#include "stat-util.h"
15a5e950 60#include "stdio-util.h"
8b43440b 61#include "string-table.h"
51517f9e 62#include "strv.h"
34658df2 63#include "tc.h"
e4de7287 64#include "tmpfile-util.h"
299ad32d 65#include "udev-util.h"
cf1d700d 66#include "util.h"
737f1405 67#include "vrf.h"
fc2f9534 68
3ca1fab7 69bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 70 assert(link);
71
78c958f8
TG		 72 if (link->flags & IFF_LOOPBACK)
73 return false;
74
75 if (!link->network)
76 return false;
77
500b96eb 78 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 79 return false;
80
a1e35fca
YW		 81 if (link->hw_addr.length != ETH_ALEN)
82 return false;
83
84 if (ether_addr_is_null(&link->hw_addr.ether))
85 return false;
86
98d20a17 87 if (STRPTR_IN_SET(link->kind,
88 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 89 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 90 return false;
91
f410d463
YW		 92 /* L3 or L3S mode do not support ARP. */
93 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
94 return false;
95
f2bfcdb9
YW		 96 if (link->network->bond)
97 return false;
98
3ca1fab7 99 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 100}
101
f8f2f880 102bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 103 assert(link);
104
fa709992
LP		 105 if (!socket_ipv6_is_supported())
106 return false;
107
d0d6a4cd
TG		 108 if (link->flags & IFF_LOOPBACK)
109 return false;
110
111 if (!link->network)
112 return false;
113
500b96eb 114 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 115 return false;
116
117 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 118 return false;
119
f2bfcdb9
YW		 120 if (link->network->bond)
121 return false;
122
e0ee46f2 123 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 124}
125
5e0534f1 126bool link_ipv6_enabled(Link *link) {
439689c6
SS		 127 assert(link);
128
129 if (!socket_ipv6_is_supported())
130 return false;
131
b102cdca 132 if (link->network->bond)
2b00a4e0
TY		 133 return false;
134
500b96eb 135 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 136 return false;
137
4cef7fe3 138 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 139 if (link_ipv6ll_enabled(link))
140 return true;
141
142 if (network_has_static_ipv6_configurations(link->network))
143 return true;
144
145 return false;
439689c6
SS		 146}
147
7191a57a
YW		 148bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
149 assert(link);
150
8e4b1b35 151 if (!link->network) {
7191a57a
YW		 152 if (!allow_unmanaged)
153 return false;
154
155 return link_has_carrier(link);
156 }
157
158 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
159 return false;
160
baa95d22
YW		 161 if (!link->network->configure_without_carrier) {
162 if (link->set_flags_messages > 0)
163 return false;
164
165 if (!link_has_carrier(link))
166 return false;
167 }
7191a57a 168
0fa8ee6c
YW		 169 if (link->set_link_messages > 0)
170 return false;
171
71a754f7
YW		 172 if (!link->stacked_netdevs_created)
173 return false;
71a754f7 174
112a0972
YW		 175 if (!link->activated)
176 return false;
112a0972 177
7191a57a
YW		 178 return true;
179}
180
15761549
YW		 181void link_ntp_settings_clear(Link *link) {
182 link->ntp = strv_free(link->ntp);
183}
184
185void link_dns_settings_clear(Link *link) {
f5fbe71d 186 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 187 for (unsigned i = 0; i < link->n_dns; i++)
188 in_addr_full_free(link->dns[i]);
15761549 189 link->dns = mfree(link->dns);
f5fbe71d 190 link->n_dns = UINT_MAX;
15761549 191
6e4571f0
YW		 192 link->search_domains = ordered_set_free(link->search_domains);
193 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 194
195 link->dns_default_route = -1;
196 link->llmnr = _RESOLVE_SUPPORT_INVALID;
197 link->mdns = _RESOLVE_SUPPORT_INVALID;
198 link->dnssec_mode = _DNSSEC_MODE_INVALID;
199 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
200
201 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
202}
203
1a6bb31f
YW		 204static void link_free_engines(Link *link) {
205 if (!link)
206 return;
207
208 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
209 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
210 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 211
212 link->lldp = sd_lldp_unref(link->lldp);
1c494872 213 link_lldp_emit_stop(link);
1a6bb31f
YW		 214
215 ndisc_flush(link);
216
217 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
218 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 219 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 220 link->ndisc = sd_ndisc_unref(link->ndisc);
221 link->radv = sd_radv_unref(link->radv);
222}
223
8301aa0b 224static Link *link_free(Link *link) {
8301aa0b 225 assert(link);
f579559b 226
15761549
YW		 227 link_ntp_settings_clear(link);
228 link_dns_settings_clear(link);
229
8eec0b9d
YW		 230 link->routes = set_free(link->routes);
231 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 232 link->dhcp_routes = set_free(link->dhcp_routes);
233 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 234 link->dhcp6_routes = set_free(link->dhcp6_routes);
235 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
236 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
237 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 238 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 239
8eec0b9d
YW		 240 link->nexthops = set_free(link->nexthops);
241 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 242
8eec0b9d
YW		 243 link->neighbors = set_free(link->neighbors);
244 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 245
8eec0b9d
YW		 246 link->addresses = set_free(link->addresses);
247 link->addresses_foreign = set_free(link->addresses_foreign);
76a86ffd 248 link->addresses_ipv4acd = set_free(link->addresses_ipv4acd);
aa651e88 249 link->pool_addresses = set_free(link->pool_addresses);
e5526518 250 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 251 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
252 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
253 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
254 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 255 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 256
4b409e85
YW		 257 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
258
1a6bb31f 259 link_free_engines(link);
49699bac 260
c166a070 261 free(link->ifname);
572b21d9 262 strv_free(link->alternative_names);
ceac4078 263 free(link->kind);
8d968fdd 264 free(link->ssid);
c643bda5 265 free(link->driver);
6cad256d 266
a34e58d4
YW		 267 unlink_and_free(link->lease_file);
268 unlink_and_free(link->lldp_file);
269 unlink_and_free(link->state_file);
c166a070 270
51517f9e 271 sd_device_unref(link->sd_device);
b5db00e5 272
0d4ad91d 273 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 274 hashmap_free(link->bound_by_links);
275
5f707e12 276 set_free_with_destructor(link->slaves, link_unref);
033295c1 277
c9c908a6
YW		 278 network_unref(link->network);
279
8301aa0b 280 return mfree(link);
14b746f7
TG		 281}
282
8301aa0b 283DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 284
6eab614d 285int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 286 Link *link;
11a7f229
TG		 287
288 assert(m);
e856ed00 289 assert(ifindex > 0);
11a7f229 290
6eab614d 291 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 292 if (!link)
293 return -ENODEV;
294
0b54c870
YW		 295 if (ret)
296 *ret = link;
297 return 0;
298}
299
300int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
301 Link *link;
302
303 assert(m);
304 assert(ifname);
11a7f229 305
0b54c870
YW		 306 link = hashmap_get(m->links_by_name, ifname);
307 if (!link)
308 return -ENODEV;
309
310 if (ret)
311 *ret = link;
11a7f229
TG		 312 return 0;
313}
314
fe321d45
YW		 315int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
316 Link *link;
317
318 assert(m);
319 assert(hw_addr);
320
321 link = hashmap_get(m->links_by_hw_addr, hw_addr);
322 if (!link)
323 return -ENODEV;
324
325 if (ret)
326 *ret = link;
327 return 0;
328}
329
81357285
YW		 330int link_get_master(Link *link, Link **ret) {
331 assert(link);
332 assert(link->manager);
333 assert(ret);
334
335 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
336 return -ENODEV;
337
6eab614d 338 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 339}
340
af9ba57a 341void link_set_state(Link *link, LinkState state) {
e331e246
TG		 342 assert(link);
343
344 if (link->state == state)
345 return;
346
0beb9542
YW		 347 log_link_debug(link, "State changed: %s -> %s",
348 link_state_to_string(link->state),
349 link_state_to_string(state));
350
e331e246
TG		 351 link->state = state;
352
353 link_send_changed(link, "AdministrativeState", NULL);
9092113d 354 link_dirty(link);
e331e246
TG		 355}
356
2a99eed0 357int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 358 int r = 0, k;
359
360 assert(link);
361 assert(link->manager);
362 assert(link->manager->event);
363
80060352
ZJS		 364 bool keep_dhcp = may_keep_dhcp &&
365 link->network &&
76a86ffd 366 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 367 (link->manager->restarting ||
368 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
369
84add3cd 370 if (!keep_dhcp) {
111bb8f9 371 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 372 if (k < 0)
36c7d709 373 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 374 }
375
2a99eed0
YW		 376 k = sd_dhcp_server_stop(link->dhcp_server);
377 if (k < 0)
378 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
379
9cc65242
YW		 380 k = sd_lldp_stop(link->lldp);
381 if (k < 0)
382 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
383
84add3cd
YW		 384 k = sd_ipv4ll_stop(link->ipv4ll);
385 if (k < 0)
386 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 387
76a86ffd 388 k = ipv4acd_stop(link);
2488e4d9
YW		 389 if (k < 0)
390 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 391
84add3cd
YW		 392 k = sd_dhcp6_client_stop(link->dhcp6_client);
393 if (k < 0)
394 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 395
2ffd6d73
YW		 396 k = dhcp6_pd_remove(link);
397 if (k < 0)
398 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 399
84add3cd
YW		 400 k = sd_ndisc_stop(link->ndisc);
401 if (k < 0)
402 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 403
84add3cd
YW		 404 k = sd_radv_stop(link->radv);
405 if (k < 0)
406 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 407
7272b25e 408 link_lldp_emit_stop(link);
111bb8f9
TG		 409 return r;
410}
411
b22d8a00 412void link_enter_failed(Link *link) {
ef1ba606 413 assert(link);
f882c247 414
370e9930 415 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 416 return;
417
6a7a4e4d 418 log_link_warning(link, "Failed");
449f7554 419
e331e246 420 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 421
2a99eed0 422 (void) link_stop_engines(link, false);
f882c247
TG		 423}
424
6accfd31
DA		 425void link_check_ready(Link *link) {
426 Address *a;
6accfd31
DA		 427
428 assert(link);
429
5f58af25
YW		 430 if (link->state == LINK_STATE_CONFIGURED)
431 return;
432
d19b9939
YW		 433 if (link->state != LINK_STATE_CONFIGURING)
434 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 435
436 if (!link->network)
a7f07cbe 437 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 438
7558f9e7
YW		 439 if (!link->tc_configured)
440 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 441
a7f07cbe
YW		 442 if (link->set_link_messages > 0)
443 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
444
445 if (!link->activated)
446 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
447
7558f9e7
YW		 448 if (link->iftype == ARPHRD_CAN) {
449 /* let's shortcut things for CAN which doesn't need most of checks below. */
450 link_set_state(link, LINK_STATE_CONFIGURED);
451 return;
452 }
453
76c5a0f2 454 if (!link->static_addresses_configured)
d19b9939 455 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 456
90e74a66 457 SET_FOREACH(a, link->addresses)
39373cb9
YW		 458 if (!address_is_ready(a)) {
459 _cleanup_free_ char *str = NULL;
460
5380707a
YW		 461 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
462 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 463 }
6aa5773b 464
354bc760
YW		 465 if (!link->static_address_labels_configured)
466 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
467
e5b35bf6
YW		 468 if (!link->static_bridge_fdb_configured)
469 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
470
ff9e0783
YW		 471 if (!link->static_bridge_mdb_configured)
472 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
473
fdeba3f5
YW		 474 if (!link->static_ipv6_proxy_ndp_configured)
475 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
476
40ca350e
YW		 477 if (!link->static_neighbors_configured)
478 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
479
d19b9939
YW		 480 if (!link->static_nexthops_configured)
481 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 482
76c5a0f2
YW		 483 if (!link->static_routes_configured)
484 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
485
0e5ef6be 486 if (!link->static_routing_policy_rules_configured)
d19b9939 487 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 488
d19b9939
YW		 489 if (!link->sr_iov_configured)
490 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 491
4bcb8625
YW		 492 /* IPv6LL is assigned after the link gains its carrier. */
493 if (!link->network->configure_without_carrier &&
494 link_ipv6ll_enabled(link) &&
495 !in6_addr_is_set(&link->ipv6ll_address))
496 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
497
498 bool has_ndisc_address = false;
499 NDiscAddress *n;
500 SET_FOREACH(n, link->ndisc_addresses)
501 if (!n->marked) {
502 has_ndisc_address = true;
503 break;
504 }
50550722 505
4bcb8625
YW		 506 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
507 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
508 !link->ipv4ll_address_configured)
509 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
510 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
511
512 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
513 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
514 (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link)) ||
515 link_ipv4ll_enabled(link)) {
516
517 if (!link->dhcp4_configured &&
518 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
519 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
520 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da 521 !link->ipv4ll_address_configured)
4bcb8625
YW		 522 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
523 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
524
790736e4
YW		 525 log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp6_routes:%s "
526 "dhcp6_pd_addresses:%s dhcp6_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
4bcb8625
YW		 527 __func__,
528 yes_no(link->dhcp4_configured),
529 yes_no(link->ipv4ll_address_configured),
530 yes_no(link->dhcp6_address_configured),
531 yes_no(link->dhcp6_route_configured),
532 yes_no(link->dhcp6_pd_address_configured),
533 yes_no(link->dhcp6_pd_route_configured),
534 yes_no(link->ndisc_addresses_configured),
535 yes_no(link->ndisc_routes_configured));
463797c1 536 }
6accfd31 537
29836c16 538 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 539}
540
97108953 541static int link_request_static_configs(Link *link) {
f882c247
TG		 542 int r;
543
544 assert(link);
545 assert(link->network);
f5be5601 546 assert(link->state != _LINK_STATE_INVALID);
f882c247 547
354bc760 548 r = link_request_static_addresses(link);
0e5ef6be
YW		 549 if (r < 0)
550 return r;
551
354bc760 552 r = link_request_static_address_labels(link);
f3ef324d
YW		 553 if (r < 0)
554 return r;
e4a71bf3 555
e5b35bf6
YW		 556 r = link_request_static_bridge_fdb(link);
557 if (r < 0)
558 return r;
559
9a038aac
YW		 560 r = link_request_static_bridge_mdb(link);
561 if (r < 0)
562 return r;
563
fdeba3f5
YW		 564 r = link_request_static_ipv6_proxy_ndp_addresses(link);
565 if (r < 0)
566 return r;
567
40ca350e 568 r = link_request_static_neighbors(link);
682c65b0
YW		 569 if (r < 0)
570 return r;
bd6379ec 571
76c5a0f2 572 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 573 if (r < 0)
574 return r;
f882c247 575
76c5a0f2
YW		 576 r = link_request_static_routes(link, false);
577 if (r < 0)
578 return r;
579
580 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 581 if (r < 0)
582 return r;
d4cdbea5 583
f882c247
TG		 584 return 0;
585}
586
1187fc33
YW		 587static int link_request_stacked_netdevs(Link *link) {
588 NetDev *netdev;
e16e4b3b
DS		 589 int r;
590
591 assert(link);
592
1187fc33
YW		 593 link->stacked_netdevs_created = false;
594 link->stacked_netdevs_after_configured_created = false;
e16e4b3b 595
1187fc33
YW		 596 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
597 r = link_request_to_crate_stacked_netdev(link, netdev);
598 if (r < 0)
599 return r;
600 }
e16e4b3b 601
1187fc33
YW		 602 if (link->create_stacked_netdev_messages == 0)
603 link->stacked_netdevs_created = true;
604 if (link->create_stacked_netdev_after_configured_messages == 0)
605 link->stacked_netdevs_after_configured_created = true;
e16e4b3b
DS		 606
607 return 0;
608}
609
8566df79 610static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 611 int r;
612
613 assert(link);
614
086b8853 615 if (link->radv) {
7465dd22 616 assert(link->radv);
94876904 617 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 618
619 log_link_debug(link, "Starting IPv6 Router Advertisements");
620
621 r = sd_radv_start(link->radv);
a254fab2 622 if (r < 0)
7465dd22
PF		 623 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
624 }
625
294f129b
YW		 626 r = ndisc_start(link);
627 if (r < 0)
628 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 629
294f129b
YW		 630 r = dhcp6_start(link);
631 if (r < 0)
632 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 633
1633c457
YW		 634 r = dhcp6_request_prefix_delegation(link);
635 if (r < 0)
636 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 637
e7ab854c
TG		 638 return 0;
639}
640
8566df79 641static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 642 int r;
643
644 assert(link);
ff254138
TG		 645 assert(link->manager);
646 assert(link->manager->event);
647
0107b769 648 if (link->dhcp_client) {
294f129b 649 r = dhcp4_start(link);
0107b769 650 if (r < 0)
294f129b 651 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 652
0b4b66cc 653 } else if (link->ipv4ll) {
6a7a4e4d 654 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 655
656 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 657 if (r < 0)
658 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 659 }
660
ab486ef4
YW		 661 if (link->dhcp_server) {
662 r = sd_dhcp_server_start(link->dhcp_server);
663 if (r < 0)
664 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
665 }
666
76a86ffd
YW		 667 r = ipv4acd_start(link);
668 if (r < 0)
669 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
670
6fc25497
SS		 671 return 0;
672}
673
8566df79 674static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 675 int r;
676
677 assert(link);
678
8566df79 679 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 680 if (r < 0)
681 return r;
682
94876904 683 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 684 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 685 if (r < 0)
686 return r;
687 }
688
2ffd6d73
YW		 689 r = link_lldp_emit_start(link);
690 if (r < 0)
691 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 692
f8549910
YW		 693 if (link->lldp) {
694 r = sd_lldp_start(link->lldp);
695 if (r < 0)
696 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
697 }
698
ff254138
TG		 699 return 0;
700}
701
0c9ee5d5
YW		 702int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
703 int r;
deb2e523 704
0c9ee5d5 705 assert(link);
deb2e523 706
0c9ee5d5 707 log_link_info(link, "Gained IPv6LL");
deb2e523 708
0c9ee5d5
YW		 709 link->ipv6ll_address = *address;
710 link_check_ready(link);
711
712 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
713 r = link_acquire_dynamic_ipv6_conf(link);
714 if (r < 0) {
715 link_enter_failed(link);
716 return r;
717 }
718 }
719
720 return 0;
deb2e523
TG		 721}
722
112a0972 723int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 724 bool required_up = false;
725 bool link_is_up = false;
852a3916 726 Link *l;
0d4ad91d
AR		 727
728 assert(link);
729
ad82f0c3
YW		 730 /* If at least one interface in bound_to_links has carrier, then make this interface up.
731 * If all interfaces in bound_to_links do not, then make this interface down. */
732
0d4ad91d
AR		 733 if (hashmap_isempty(link->bound_to_links))
734 return 0;
735
736 if (link->flags & IFF_UP)
737 link_is_up = true;
738
852a3916 739 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 740 if (link_has_carrier(l)) {
741 required_up = true;
742 break;
743 }
744
852a3916 745 if (!required_up && link_is_up)
68f52063 746 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 747 if (required_up && !link_is_up)
68f52063 748 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 749
750 return 0;
751}
752
753static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 754 Link *l;
755 int r;
756
757 assert(link);
758
ad82f0c3
YW		 759 /* Update up or down state of interfaces which depend on this interface's carrier state. */
760
0d4ad91d
AR		 761 if (hashmap_isempty(link->bound_by_links))
762 return 0;
763
852a3916 764 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 765 r = link_handle_bound_to_list(l);
766 if (r < 0)
767 return r;
768 }
769
770 return 0;
771}
772
773static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
774 int r;
775
776 assert(link);
777 assert(carrier);
778
779 if (link == carrier)
780 return 0;
781
782 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
783 return 0;
784
190b3b5c 785 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 786 if (r < 0)
787 return r;
788
9092113d
YW		 789 link_dirty(link);
790
0d4ad91d
AR		 791 return 0;
792}
793
794static int link_new_bound_by_list(Link *link) {
795 Manager *m;
796 Link *carrier;
0d4ad91d 797 int r;
0d4ad91d
AR		 798
799 assert(link);
800 assert(link->manager);
801
802 m = link->manager;
803
6eab614d 804 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 805 if (!carrier->network)
806 continue;
807
808 if (strv_isempty(carrier->network->bind_carrier))
809 continue;
810
191a3f16 811 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 812 r = link_put_carrier(link, carrier, &link->bound_by_links);
813 if (r < 0)
814 return r;
0d4ad91d
AR		 815 }
816 }
817
90e74a66 818 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 819 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
820 if (r < 0)
821 return r;
0d4ad91d
AR		 822 }
823
824 return 0;
825}
826
827static int link_new_bound_to_list(Link *link) {
828 Manager *m;
829 Link *carrier;
0d4ad91d 830 int r;
0d4ad91d
AR		 831
832 assert(link);
833 assert(link->manager);
834
835 if (!link->network)
836 return 0;
837
838 if (strv_isempty(link->network->bind_carrier))
839 return 0;
840
841 m = link->manager;
842
6eab614d 843 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 844 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 845 r = link_put_carrier(link, carrier, &link->bound_to_links);
846 if (r < 0)
847 return r;
0d4ad91d
AR		 848 }
849 }
850
852a3916 851 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 852 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
853 if (r < 0)
854 return r;
0d4ad91d
AR		 855 }
856
857 return 0;
858}
859
860static int link_new_carrier_maps(Link *link) {
861 int r;
862
863 r = link_new_bound_by_list(link);
864 if (r < 0)
865 return r;
866
867 r = link_handle_bound_by_list(link);
868 if (r < 0)
869 return r;
870
871 r = link_new_bound_to_list(link);
872 if (r < 0)
873 return r;
874
852a3916 875 return link_handle_bound_to_list(link);
0d4ad91d
AR		 876}
877
878static void link_free_bound_to_list(Link *link) {
9092113d 879 bool updated = false;
0d4ad91d 880 Link *bound_to;
0d4ad91d 881
9092113d
YW		 882 assert(link);
883
884 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
885 updated = true;
0d4ad91d
AR		 886
887 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 888 link_dirty(bound_to);
0d4ad91d
AR		 889 }
890
9092113d
YW		 891 if (updated)
892 link_dirty(link);
0d4ad91d
AR		 893}
894
895static void link_free_bound_by_list(Link *link) {
9092113d 896 bool updated = false;
0d4ad91d 897 Link *bound_by;
0d4ad91d 898
9092113d
YW		 899 assert(link);
900
901 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
902 updated = true;
0d4ad91d
AR		 903
904 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 905 link_dirty(bound_by);
0d4ad91d
AR		 906 link_handle_bound_to_list(bound_by);
907 }
908 }
909
9092113d
YW		 910 if (updated)
911 link_dirty(link);
0d4ad91d
AR		 912}
913
914static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 915 assert(link);
916
9092113d
YW		 917 link_free_bound_to_list(link);
918 link_free_bound_by_list(link);
0d4ad91d
AR		 919}
920
81357285 921static int link_append_to_master(Link *link) {
5f707e12
YW		 922 Link *master;
923 int r;
924
925 assert(link);
5f707e12 926
81357285
YW		 927 /* - The link may have no master.
928 * - RTM_NEWLINK message about master interface may not be received yet. */
929 if (link_get_master(link, &master) < 0)
930 return 0;
5f707e12 931
de7fef4b 932 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 933 if (r <= 0)
5f707e12
YW		 934 return r;
935
936 link_ref(link);
937 return 0;
938}
939
81357285 940static void link_drop_from_master(Link *link) {
5f707e12
YW		 941 Link *master;
942
943 assert(link);
944
81357285 945 if (!link->manager)
5f707e12
YW		 946 return;
947
81357285 948 if (link_get_master(link, &master) < 0)
5f707e12
YW		 949 return;
950
951 link_unref(set_remove(master->slaves, link));
952}
953
56001f02
YW		 954static void link_drop_requests(Link *link) {
955 Request *req;
956
957 assert(link);
958 assert(link->manager);
959
960 ORDERED_SET_FOREACH(req, link->manager->request_queue)
961 if (req->link == link)
962 request_drop(req);
963}
964
cc2d7efc 965static Link *link_drop(Link *link) {
0b54c870
YW		 966 char **n;
967
63130eb3 968 if (!link)
cc2d7efc 969 return NULL;
0d4ad91d 970
63130eb3
YW		 971 assert(link->manager);
972
0d4ad91d
AR		 973 link_set_state(link, LINK_STATE_LINGER);
974
63130eb3
YW		 975 /* Drop all references from other links and manager. Note that async netlink calls may have
976 * references to the link, and they will be dropped when we receive replies. */
977
56001f02
YW		 978 link_drop_requests(link);
979
0d4ad91d
AR		 980 link_free_carrier_maps(link);
981
81357285 982 link_drop_from_master(link);
5f707e12 983
63130eb3 984 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 985
db2f8a2e 986 (void) unlink(link->state_file);
63130eb3
YW		 987 link_clean(link);
988
0b54c870
YW		 989 STRV_FOREACH(n, link->alternative_names)
990 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 991 hashmap_remove(link->manager->links_by_name, link->ifname);
992
fe321d45
YW		 993 /* bonding master and its slaves have the same hardware address. */
994 if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link)
995 hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr);
996
63130eb3 997 /* The following must be called at last. */
6eab614d 998 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 999 return link_unref(link);
0d4ad91d
AR		 1000}
1001
5e5b137a 1002static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1003 int k, r;
1004
1005 assert(link);
1006 assert(link->manager);
5e5b137a 1007
e36d601c 1008 r = link_drop_foreign_routes(link);
5e5b137a 1009
e36d601c 1010 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 1011 if (k < 0 && r >= 0)
1012 r = k;
1013
e36d601c 1014 k = link_drop_foreign_addresses(link);
0b81225e
YW		 1015 if (k < 0 && r >= 0)
1016 r = k;
d1bdafd2 1017
e36d601c 1018 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 1019 if (k < 0 && r >= 0)
1020 r = k;
1021
0b81225e
YW		 1022 k = manager_drop_foreign_routing_policy_rules(link->manager);
1023 if (k < 0 && r >= 0)
1024 r = k;
1025
1026 return r;
5e5b137a
TG		 1027}
1028
3104883d 1029static int link_drop_config(Link *link) {
0b81225e
YW		 1030 int k, r;
1031
1032 assert(link);
1033 assert(link->manager);
3104883d 1034
e36d601c 1035 r = link_drop_routes(link);
3104883d 1036
e36d601c 1037 k = link_drop_nexthops(link);
0b81225e
YW		 1038 if (k < 0 && r >= 0)
1039 r = k;
d1bdafd2 1040
e36d601c 1041 k = link_drop_addresses(link);
0b81225e
YW		 1042 if (k < 0 && r >= 0)
1043 r = k;
1044
e36d601c 1045 k = link_drop_neighbors(link);
25b82b6e
YW		 1046 if (k < 0 && r >= 0)
1047 r = k;
1048
0b81225e
YW		 1049 k = manager_drop_routing_policy_rules(link->manager, link);
1050 if (k < 0 && r >= 0)
1051 r = k;
3104883d 1052
c69305ff
LP		 1053 ndisc_flush(link);
1054
0b81225e 1055 return r;
3104883d
SS		 1056}
1057
c3b94251 1058static int link_configure(Link *link) {
4ecdcb07
YW		 1059 int r;
1060
ef1ba606 1061 assert(link);
b22d8a00 1062 assert(link->network);
bd08ce56 1063 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1064
1187fc33
YW		 1065 link_set_state(link, LINK_STATE_CONFIGURING);
1066
34658df2 1067 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1068 if (r < 0)
1069 return r;
1070
7558f9e7
YW		 1071 if (link->iftype == ARPHRD_CAN) {
1072 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1073 r = link_request_to_set_can(link);
1074 if (r < 0)
1075 return r;
1076
1077 return link_request_to_activate(link);
1078 }
1079
518cd6b5
SS		 1080 r = link_configure_sr_iov(link);
1081 if (r < 0)
1082 return r;
1083
5e0534f1 1084 r = link_set_sysctl(link);
b69c3180
SS		 1085 if (r < 0)
1086 return r;
8749cbcd 1087
d05c332c 1088 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1089 if (r < 0)
1090 return r;
1091
1187fc33 1092 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1093 if (r < 0)
1094 return r;
1095
1187fc33 1096 r = link_request_to_set_group(link);
99d2baa2
SS		 1097 if (r < 0)
1098 return r;
1099
1187fc33
YW		 1100 r = link_configure_mtu(link);
1101 if (r < 0)
1102 return r;
1103
1104 r = link_request_to_set_addrgen_mode(link);
1105 if (r < 0)
1106 return r;
1107
1108 r = link_request_to_set_master(link);
1109 if (r < 0)
1110 return r;
1111
1112 r = link_request_stacked_netdevs(link);
1113 if (r < 0)
1114 return r;
1115
1116 r = link_request_to_set_bond(link);
1117 if (r < 0)
1118 return r;
1119
1120 r = link_request_to_set_bridge(link);
1121 if (r < 0)
1122 return r;
1123
1124 r = link_request_to_set_bridge_vlan(link);
1125 if (r < 0)
1126 return r;
1127
1128 r = link_request_to_activate(link);
89fe6535
SS		 1129 if (r < 0)
1130 return r;
1131
2ffd6d73
YW		 1132 r = ipv4ll_configure(link);
1133 if (r < 0)
1134 return r;
64b21ece 1135
2ffd6d73
YW		 1136 r = dhcp4_configure(link);
1137 if (r < 0)
1138 return r;
eb34d4af 1139
2ffd6d73
YW		 1140 r = dhcp6_configure(link);
1141 if (r < 0)
1142 return r;
f5a8c43f 1143
2ffd6d73
YW		 1144 r = ndisc_configure(link);
1145 if (r < 0)
1146 return r;
4138fb2c 1147
1d28a3cf
YW		 1148 r = link_request_dhcp_server(link);
1149 if (r < 0)
1150 return r;
1151
a254fab2 1152 r = link_request_radv(link);
086b8853
YW		 1153 if (r < 0)
1154 return r;
7465dd22 1155
2ffd6d73
YW		 1156 r = link_lldp_rx_configure(link);
1157 if (r < 0)
1158 return r;
ce43e484 1159
4c649652
DS		 1160 /* Drop foreign config, but ignore loopback or critical devices.
1161 * We do not want to remove loopback address or addresses used for root NFS. */
1162 if (!(link->flags & IFF_LOOPBACK) &&
1163 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
1164 r = link_drop_foreign_config(link);
1165 if (r < 0)
1166 return r;
1167 }
1168
1187fc33
YW		 1169 r = link_request_static_configs(link);
1170 if (r < 0)
1171 return r;
1172
1173 if (!link_has_carrier(link))
1174 return 0;
1175
1176 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1177}
1178
170e88c8
YW		 1179static int link_get_network(Link *link, Network **ret) {
1180 Network *network;
1a3caa49 1181 int r;
170e88c8
YW		 1182
1183 assert(link);
1184 assert(link->manager);
1185 assert(ret);
1186
1187 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1188 bool warn = false;
1189
1a3caa49 1190 r = net_match_config(
170e88c8
YW		 1191 &network->match,
1192 link->sd_device,
ca2b7cd8 1193 &link->hw_addr.ether,
170e88c8
YW		 1194 &link->permanent_mac,
1195 link->driver,
1196 link->iftype,
1197 link->ifname,
1198 link->alternative_names,
1199 link->wlan_iftype,
1200 link->ssid,
1a3caa49
YW		 1201 &link->bssid);
1202 if (r < 0)
1203 return r;
1204 if (r == 0)
170e88c8
YW		 1205 continue;
1206
1207 if (network->match.ifname && link->sd_device) {
1208 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1209 const char *attr;
1210
1211 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1212 (void) safe_atou8(attr, &name_assign_type);
1213
1214 warn = name_assign_type == NET_NAME_ENUM;
1215 }
1216
1217 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1218 "found matching network '%s'%s.",
1219 network->filename,
1220 warn ? ", based on potentially unpredictable interface name" : "");
1221
1222 if (network->unmanaged)
1223 return -ENOENT;
1224
1225 *ret = network;
1226 return 0;
1227 }
1228
1229 return -ENOENT;
1230}
1231
7f80fa12 1232static int link_reconfigure_impl(Link *link, bool force) {
ad932b15
YW		 1233 Network *network;
1234 int r;
1235
5a1860f7 1236 assert(link);
572b21d9 1237
170e88c8 1238 r = link_get_network(link, &network);
ad932b15 1239 if (r == -ENOENT) {
29836c16 1240 link_set_state(link, LINK_STATE_UNMANAGED);
ad932b15 1241 return 0;
170e88c8
YW		 1242 }
1243 if (r < 0)
ad932b15
YW		 1244 return r;
1245
99b8517c 1246 if (link->network == network && !force)
ad932b15
YW		 1247 return 0;
1248
1249 log_link_info(link, "Re-configuring with %s", network->filename);
1250
1251 /* Dropping old .network file */
2a99eed0 1252 r = link_stop_engines(link, false);
572b21d9 1253 if (r < 0)
ad932b15 1254 return r;
ad932b15 1255
19d9a5ad
YW		 1256 link_drop_requests(link);
1257
ad932b15
YW		 1258 r = link_drop_config(link);
1259 if (r < 0)
1260 return r;
1261
ad932b15
YW		 1262 link_free_carrier_maps(link);
1263 link_free_engines(link);
1264 link->network = network_unref(link->network);
59c31eba 1265 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 1266
1267 /* Then, apply new .network file */
9092113d 1268 link->network = network_ref(network);
b156a95d 1269 link_update_operstate(link, true);
9092113d 1270 link_dirty(link);
ad932b15
YW		 1271
1272 r = link_new_carrier_maps(link);
1273 if (r < 0)
1274 return r;
1275
1276 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1277 link->activated = false;
ad932b15 1278
ad932b15
YW		 1279 r = link_configure(link);
1280 if (r < 0)
1281 return r;
1282
0e397560 1283 return 1;
ad932b15
YW		 1284}
1285
d09a179e
YW		 1286static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force, bool update_wifi) {
1287 bool link_was_lower_up;
572b21d9
YW		 1288 int r;
1289
d09a179e
YW		 1290 assert(link);
1291
1292 link_was_lower_up = link->flags & IFF_LOWER_UP;
1293
5a1860f7
YW		 1294 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1295 if (r <= 0)
1296 return r;
1297
d09a179e
YW		 1298 if (update_wifi && link_was_lower_up && link->flags & IFF_LOWER_UP) {
1299 /* If the interface's L1 was not up, then wifi_get_info() is already called in
1300 * link_update_flags(). So, it is not necessary to re-call here. */
1301 r = wifi_get_info(link);
1302 if (r < 0) {
1303 link_enter_failed(link);
1304 return 0;
1305 }
1306 }
1307
7f80fa12 1308 r = link_reconfigure_impl(link, force);
d09a179e 1309 if (r < 0) {
572b21d9 1310 link_enter_failed(link);
d09a179e
YW		 1311 return 0;
1312 }
572b21d9 1313
d09a179e 1314 return r;
572b21d9
YW		 1315}
1316
5a1860f7 1317static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
d09a179e 1318 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false, /* update_wifi = */ false);
5a1860f7 1319}
572b21d9 1320
5a1860f7 1321static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
d09a179e 1322 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true, /* update_wifi = */ false);
572b21d9
YW		 1323}
1324
d09a179e 1325static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9
YW		 1326 int r;
1327
d09a179e
YW		 1328 assert(link);
1329
1330 r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false, /* update_wifi = */ true);
1331 if (r != 0)
1332 return r;
1333
1334 /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */
1335 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
1336 return 0;
1337
1338 /* re-request static configs, and restart engines. */
1339 r = link_stop_engines(link, false);
1340 if (r < 0) {
1341 link_enter_failed(link);
1342 return 0;
1343 }
1344
1345 r = link_acquire_dynamic_conf(link);
1346 if (r < 0) {
1347 link_enter_failed(link);
1348 return 0;
1349 }
1350
1351 r = link_request_static_configs(link);
1352 if (r < 0) {
1353 link_enter_failed(link);
1354 return 0;
1355 }
1356
1357 return 0;
1358}
1359
1360static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) {
1361 int r;
1362
1363 assert(link);
1364 assert(callback);
1365
8bceafa7 1366 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1367 * the function from being called multiple times simultaneously, refuse to reconfigure the
1368 * interface in these cases. */
8bceafa7 1369 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1370 return 0; /* 0 means no-op. */
2c0d7ed3 1371
d09a179e 1372 r = link_call_getlink(link, callback);
572b21d9
YW		 1373 if (r < 0)
1374 return r;
1375
8bceafa7 1376 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1377}
1378
d09a179e
YW		 1379int link_reconfigure(Link *link, bool force) {
1380 return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
1381}
1382
1383int link_reconfigure_after_sleep(Link *link) {
1384 return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler);
1385}
1386
e6bf7774 1387static int link_initialized_and_synced(Link *link) {
505f8da7 1388 Network *network;
505f8da7
TG		 1389 int r;
1390
1391 assert(link);
1392 assert(link->ifname);
1393 assert(link->manager);
1394
bd08ce56 1395 /* We may get called either from the asynchronous netlink callback,
0d411b7f 1396 * or directly from link_check_initialized() if running in a container. */
bd08ce56 1397 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 1398 return 0;
505f8da7 1399
6a7a4e4d 1400 log_link_debug(link, "Link state is up-to-date");
bd08ce56 1401 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1402
0d4ad91d
AR		 1403 r = link_new_bound_by_list(link);
1404 if (r < 0)
1405 return r;
1406
1407 r = link_handle_bound_by_list(link);
1408 if (r < 0)
1409 return r;
1410
c4a03a56 1411 if (!link->network) {
0894cfe4 1412 r = wifi_get_info(link);
8d968fdd
YW		 1413 if (r < 0)
1414 return r;
1415
170e88c8 1416 r = link_get_network(link, &network);
c4a03a56 1417 if (r == -ENOENT) {
29836c16 1418 link_set_state(link, LINK_STATE_UNMANAGED);
4232cf04 1419 return 0;
170e88c8
YW		 1420 }
1421 if (r < 0)
c4a03a56 1422 return r;
505f8da7 1423
c4a03a56
TG		 1424 if (link->flags & IFF_LOOPBACK) {
1425 if (network->link_local != ADDRESS_FAMILY_NO)
1426 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 1427
c4a03a56
TG		 1428 if (network->dhcp != ADDRESS_FAMILY_NO)
1429 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 1430
c4a03a56
TG		 1431 if (network->dhcp_server)
1432 log_link_debug(link, "Ignoring DHCP server for loopback link");
1433 }
bd2efe92 1434
9092113d 1435 link->network = network_ref(network);
bcdcc596 1436 link_update_operstate(link, false);
9092113d 1437 link_dirty(link);
c4a03a56 1438 }
505f8da7 1439
0d4ad91d
AR		 1440 r = link_new_bound_to_list(link);
1441 if (r < 0)
1442 return r;
1443
852a3916 1444 return link_configure(link);
505f8da7
TG		 1445}
1446
302a796f 1447static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1448 int r;
1449
5a1860f7
YW		 1450 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1451 if (r <= 0)
0b54c870 1452 return r;
572b21d9 1453
4ff296b0
YW		 1454 r = link_initialized_and_synced(link);
1455 if (r < 0)
1456 link_enter_failed(link);
5a1860f7
YW		 1457
1458 return 0;
e6bf7774
YW		 1459}
1460
3be9d62a 1461static int link_initialized(Link *link, sd_device *device) {
4f561e8e 1462 assert(link);
4f561e8e
TG		 1463 assert(device);
1464
8434fd5c 1465 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 1466 return 0;
1467
51517f9e 1468 if (link->sd_device)
679b3605
TG		 1469 return 0;
1470
79008bdd 1471 log_link_debug(link, "udev initialized link");
bd08ce56 1472 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 1473
51517f9e 1474 link->sd_device = sd_device_ref(device);
4f561e8e 1475
3c9b8860
TG		 1476 /* udev has initialized the link, but we don't know if we have yet
1477 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1478 * when it returns we know that the pending NEWLINKs have already been
1479 * processed and that we are up-to-date */
4f561e8e 1480
5a1860f7 1481 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1482}
1483
0d411b7f 1484static int link_check_initialized(Link *link) {
51517f9e 1485 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1486 int r;
505f8da7 1487
0d411b7f 1488 assert(link);
505f8da7 1489
0d411b7f 1490 if (path_is_read_only_fs("/sys") > 0)
852a3916 1491 /* no udev */
0d411b7f 1492 return link_initialized_and_synced(link);
852a3916
YW		 1493
1494 /* udev should be around */
0ac655a6 1495 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1496 if (r < 0) {
1497 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1498 return 0;
1499 }
1500
1501 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1502 if (r < 0)
1503 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1504 if (r == 0) {
1505 /* not yet ready */
1506 log_link_debug(link, "link pending udev initialization...");
1507 return 0;
1508 }
1509
1510 r = device_is_renaming(device);
0d411b7f
YW		 1511 if (r < 0)
1512 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1513 if (r > 0) {
1514 log_link_debug(link, "Interface is being renamed, pending initialization.");
1515 return 0;
4f561e8e 1516 }
505f8da7 1517
0d411b7f 1518 return link_initialized(link, device);
a748b692
TG		 1519}
1520
3be9d62a
YW		 1521int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
1522 sd_device_action_t action;
1523 Manager *m = userdata;
1524 Link *link = NULL;
1525 int r, ifindex;
1526
1527 assert(m);
1528 assert(device);
1529
1530 r = sd_device_get_action(device, &action);
1531 if (r < 0) {
1532 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
1533 return 0;
1534 }
1535
1536 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
1537 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
1538 * still exists — and we are interested in that. */
1539 if (action == SD_DEVICE_REMOVE)
1540 return 0;
1541
1542 r = sd_device_get_ifindex(device, &ifindex);
1543 if (r < 0) {
1544 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
1545 device_action_to_string(action));
1546 return 0;
1547 }
1548
1549 r = device_is_renaming(device);
1550 if (r < 0) {
4b9a8c2b 1551 log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
3be9d62a
YW		 1552 device_action_to_string(action));
1553 return 0;
1554 }
1555 if (r > 0) {
1556 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
1557 return 0;
1558 }
1559
6eab614d 1560 r = link_get_by_index(m, ifindex, &link);
3be9d62a 1561 if (r < 0) {
4b9a8c2b 1562 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
3be9d62a
YW		 1563 return 0;
1564 }
1565
4b9a8c2b
YW		 1566 r = link_initialized(link, device);
1567 if (r < 0)
1568 link_enter_failed(link);
3be9d62a
YW		 1569
1570 return 0;
1571}
1572
9c0a72f9
TG		 1573static int link_carrier_gained(Link *link) {
1574 int r;
1575
1576 assert(link);
1577
aa9117c0
YW		 1578 r = link_handle_bound_by_list(link);
1579 if (r < 0)
1580 return r;
1581
600b7898
YW		 1582 if (link->iftype == ARPHRD_CAN)
1583 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1584 return 0;
600b7898 1585
b9ea3d2e 1586 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1587 r = link_acquire_dynamic_conf(link);
f0269653 1588 if (r < 0)
9c0a72f9 1589 return r;
6fc25497 1590
97108953 1591 r = link_request_static_configs(link);
6fc25497
SS		 1592 if (r < 0)
1593 return r;
9c0a72f9
TG		 1594 }
1595
aa9117c0 1596 return 0;
9c0a72f9
TG		 1597}
1598
1599static int link_carrier_lost(Link *link) {
1600 int r;
1601
1602 assert(link);
1603
aa9117c0
YW		 1604 r = link_handle_bound_by_list(link);
1605 if (r < 0)
1606 return r;
93b4dab5 1607
600b7898
YW		 1608 if (link->iftype == ARPHRD_CAN)
1609 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1610 return 0;
1611
1612 if (link->network && link->network->ignore_carrier_loss)
1613 return 0;
600b7898 1614
2a99eed0 1615 r = link_stop_engines(link, false);
9c0a72f9
TG		 1616 if (r < 0) {
1617 link_enter_failed(link);
1618 return r;
1619 }
1620
3104883d
SS		 1621 r = link_drop_config(link);
1622 if (r < 0)
1623 return r;
1624
2c7b826d 1625 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 1626 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 1627 r = link_drop_foreign_config(link);
1628 if (r < 0)
1629 return r;
1630 }
3104883d 1631
aa9117c0 1632 return 0;
0c9ee5d5
YW		 1633}
1634
0c9ee5d5
YW		 1635static int link_admin_state_up(Link *link) {
1636 int r;
1637
1638 assert(link);
1639
1640 /* This is called every time an interface admin state changes to up;
1641 * specifically, when IFF_UP flag changes from unset to set. */
1642
1643 if (!link->network)
1644 return 0;
1645
899b0e5e 1646 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
712fd5d2
YW		 1647 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down.");
1648 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1649 }
1650
1651 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1652 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1653 r = link_set_ipv6_mtu(link);
1654 if (r < 0)
1655 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1656
1657 return 0;
1658}
1659
1660static int link_admin_state_down(Link *link) {
1661 assert(link);
1662
1663 if (!link->network)
1664 return 0;
1665
899b0e5e 1666 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
712fd5d2
YW		 1667 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up.");
1668 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1669 }
1670
1671 return 0;
1672}
1673
1674bool link_has_carrier(Link *link) {
1675 /* see Documentation/networking/operstates.txt in the kernel sources */
1676
1677 if (link->kernel_operstate == IF_OPER_UP)
1678 return true;
1679
1680 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1681 /* operstate may not be implemented, so fall back to flags */
1682 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1683 !FLAGS_SET(link->flags, IFF_DORMANT))
1684 return true;
1685
1686 return false;
1687}
1688
1689static bool link_is_enslaved(Link *link) {
1690 if (link->flags & IFF_SLAVE)
1691 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
1692 return true;
1693
1694 if (!link->network)
1695 return false;
1696
1697 if (link->master_ifindex > 0 && link->network->bridge)
1698 return true;
1699
1700 /* TODO: add conditions for other netdevs. */
1701
1702 return false;
1703}
1704
1705static LinkAddressState address_state_from_scope(uint8_t scope) {
1706 if (scope < RT_SCOPE_SITE)
1707 /* universally accessible addresses found */
1708 return LINK_ADDRESS_STATE_ROUTABLE;
1709
1710 if (scope < RT_SCOPE_HOST)
1711 /* only link or site local addresses found */
1712 return LINK_ADDRESS_STATE_DEGRADED;
1713
1714 /* no useful addresses found */
1715 return LINK_ADDRESS_STATE_OFF;
1716}
1717
1718void link_update_operstate(Link *link, bool also_update_master) {
1719 LinkOperationalState operstate;
1720 LinkCarrierState carrier_state;
1721 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1722 LinkOnlineState online_state;
1723 _cleanup_strv_free_ char **p = NULL;
1724 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1725 bool changed = false;
1726 Address *address;
1727
1728 assert(link);
1729
1730 if (link->kernel_operstate == IF_OPER_DORMANT)
1731 carrier_state = LINK_CARRIER_STATE_DORMANT;
1732 else if (link_has_carrier(link)) {
1733 if (link_is_enslaved(link))
1734 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1735 else
1736 carrier_state = LINK_CARRIER_STATE_CARRIER;
1737 } else if (link->flags & IFF_UP)
1738 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1739 else
1740 carrier_state = LINK_CARRIER_STATE_OFF;
1741
1742 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1743 Link *slave;
1744
1745 SET_FOREACH(slave, link->slaves) {
1746 link_update_operstate(slave, false);
1747
1748 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1749 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1750 }
1751 }
1752
1753 SET_FOREACH(address, link->addresses) {
1754 if (!address_is_ready(address))
1755 continue;
1756
1757 if (address->family == AF_INET)
1758 ipv4_scope = MIN(ipv4_scope, address->scope);
1759
1760 if (address->family == AF_INET6)
1761 ipv6_scope = MIN(ipv6_scope, address->scope);
1762 }
1763
1764 /* for operstate we also take foreign addresses into account */
1765 SET_FOREACH(address, link->addresses_foreign) {
1766 if (!address_is_ready(address))
1767 continue;
1768
1769 if (address->family == AF_INET)
1770 ipv4_scope = MIN(ipv4_scope, address->scope);
1771
1772 if (address->family == AF_INET6)
1773 ipv6_scope = MIN(ipv6_scope, address->scope);
1774 }
1775
1776 ipv4_address_state = address_state_from_scope(ipv4_scope);
1777 ipv6_address_state = address_state_from_scope(ipv6_scope);
1778 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1779
1780 /* Mapping of address and carrier state vs operational state
1781 * carrier state
1782 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1783 * ------------------------------------------------------------------------------
1784 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1785 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1786 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1787 */
1788
1789 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1790 operstate = (LinkOperationalState) carrier_state;
1791 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1792 operstate = LINK_OPERSTATE_ROUTABLE;
1793 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1794 operstate = LINK_OPERSTATE_DEGRADED;
1795 else
1796 operstate = LINK_OPERSTATE_ENSLAVED;
1797
1798 /* Only determine online state for managed links with RequiredForOnline=yes */
1799 if (!link->network || !link->network->required_for_online)
1800 online_state = _LINK_ONLINE_STATE_INVALID;
1801 else if (operstate < link->network->required_operstate_for_online.min ||
1802 operstate > link->network->required_operstate_for_online.max)
1803 online_state = LINK_ONLINE_STATE_OFFLINE;
1804 else {
1805 AddressFamily required_family = link->network->required_family_for_online;
1806 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1807 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1808
1809 /* The operational state is within the range required for online.
1810 * If a particular address family is also required, we might revert
1811 * to offline in the blocks below. */
1812 online_state = LINK_ONLINE_STATE_ONLINE;
1813
1814 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1815 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1816 online_state = LINK_ONLINE_STATE_OFFLINE;
1817 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1818 online_state = LINK_ONLINE_STATE_OFFLINE;
1819 }
1820
1821 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1822 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1823 online_state = LINK_ONLINE_STATE_OFFLINE;
1824 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1825 online_state = LINK_ONLINE_STATE_OFFLINE;
1826 }
1827 }
1828
1829 if (link->carrier_state != carrier_state) {
1830 link->carrier_state = carrier_state;
1831 changed = true;
1832 if (strv_extend(&p, "CarrierState") < 0)
1833 log_oom();
1834 }
1835
1836 if (link->address_state != address_state) {
1837 link->address_state = address_state;
1838 changed = true;
1839 if (strv_extend(&p, "AddressState") < 0)
1840 log_oom();
1841 }
0d4ad91d 1842
0c9ee5d5
YW		 1843 if (link->ipv4_address_state != ipv4_address_state) {
1844 link->ipv4_address_state = ipv4_address_state;
1845 changed = true;
1846 if (strv_extend(&p, "IPv4AddressState") < 0)
1847 log_oom();
1848 }
9c0a72f9 1849
0c9ee5d5
YW		 1850 if (link->ipv6_address_state != ipv6_address_state) {
1851 link->ipv6_address_state = ipv6_address_state;
1852 changed = true;
1853 if (strv_extend(&p, "IPv6AddressState") < 0)
1854 log_oom();
1855 }
9c0a72f9 1856
0c9ee5d5
YW		 1857 if (link->operstate != operstate) {
1858 link->operstate = operstate;
1859 changed = true;
1860 if (strv_extend(&p, "OperationalState") < 0)
1861 log_oom();
1862 }
9c0a72f9 1863
0c9ee5d5
YW		 1864 if (link->online_state != online_state) {
1865 link->online_state = online_state;
1866 changed = true;
1867 if (strv_extend(&p, "OnlineState") < 0)
1868 log_oom();
1869 }
9c0a72f9 1870
0c9ee5d5
YW		 1871 if (p)
1872 link_send_changed_strv(link, p);
1873 if (changed)
1874 link_dirty(link);
9c0a72f9 1875
0c9ee5d5
YW		 1876 if (also_update_master) {
1877 Link *master;
9c0a72f9 1878
0c9ee5d5
YW		 1879 if (link_get_master(link, &master) >= 0)
1880 link_update_operstate(master, true);
1881 }
9c0a72f9
TG		 1882}
1883
0c9ee5d5
YW		 1884#define FLAG_STRING(string, flag, old, new) \
1885 (((old ^ new) & flag) \
1886 ? ((old & flag) ? (" -" string) : (" +" string)) \
1887 : "")
1888
0d411b7f 1889static int link_update_flags(Link *link, sd_netlink_message *message) {
710fa1b3 1890 bool link_was_lower_up, link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1891 uint8_t operstate;
1892 unsigned flags;
d236718c
DS		 1893 int r;
1894
61135582 1895 assert(link);
0d411b7f 1896 assert(message);
61135582 1897
0d411b7f 1898 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1899 if (r < 0)
0d411b7f 1900 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1901
0d411b7f
YW		 1902 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1903 if (r == -ENODATA)
1904 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1905 operstate = link->kernel_operstate;
0d411b7f
YW		 1906 else if (r < 0)
1907 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1908
0d411b7f 1909 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1910 return 0;
1911
0c9ee5d5
YW		 1912 if (link->flags != flags) {
1913 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1914
0c9ee5d5
YW		 1915 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",
1916 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1917 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1918 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1919 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1920 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1921 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1922 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1923 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1924 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1925 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1926 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1927 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1928 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1929 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1930 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1931 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1932 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1933 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1934 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1935
0c9ee5d5
YW		 1936 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1937 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1938 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1939 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1940 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1941 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1942 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1943 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1944
0c9ee5d5
YW		 1945 if (unknown_flags_added)
1946 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1947
0c9ee5d5
YW		 1948 if (unknown_flags_removed)
1949 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1950 }
61135582 1951
710fa1b3 1952 link_was_lower_up = link->flags & IFF_LOWER_UP;
0d411b7f
YW		 1953 link_was_admin_up = link->flags & IFF_UP;
1954 had_carrier = link_has_carrier(link);
1955
0c9ee5d5
YW		 1956 link->flags = flags;
1957 link->kernel_operstate = operstate;
36161cba 1958
0c9ee5d5 1959 link_update_operstate(link, true);
61135582 1960
710fa1b3
YW		 1961 if (!link_was_lower_up && (link->flags & IFF_LOWER_UP)) {
1962 r = wifi_get_info(link);
1963 if (r < 0)
1964 return r;
1965 if (r > 0) {
1966 /* All link information is up-to-date. So, it is not necessary to call
1967 * RTM_GETLINK netlink method again. */
1968 r = link_reconfigure_impl(link, /* force = */ false);
1969 if (r < 0)
1970 return r;
1971 }
1972 }
1973
0d411b7f
YW		 1974 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1975 log_link_info(link, "Link UP");
22936833 1976
0d411b7f
YW		 1977 r = link_admin_state_up(link);
1978 if (r < 0)
1979 return r;
1980 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1981 log_link_info(link, "Link DOWN");
0d4ad91d 1982
0d411b7f 1983 r = link_admin_state_down(link);
0d4ad91d
AR		 1984 if (r < 0)
1985 return r;
7619683b
TG		 1986 }
1987
0d411b7f
YW		 1988 if (!had_carrier && link_has_carrier(link)) {
1989 log_link_info(link, "Gained carrier");
0d4ad91d 1990
0d411b7f 1991 r = link_carrier_gained(link);
30de2b89
YW		 1992 if (r < 0)
1993 return r;
0d411b7f
YW		 1994 } else if (had_carrier && !link_has_carrier(link)) {
1995 log_link_info(link, "Lost carrier");
1996
1997 r = link_carrier_lost(link);
0b54c870
YW		 1998 if (r < 0)
1999 return r;
b8941f74
TG		 2000 }
2001
0d411b7f
YW		 2002 return 0;
2003}
afe7fd56 2004
0d411b7f
YW		 2005static int link_update_master(Link *link, sd_netlink_message *message) {
2006 int master_ifindex, r;
7465dd22 2007
0d411b7f
YW		 2008 assert(link);
2009 assert(message);
69629de9 2010
0d411b7f
YW		 2011 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2012 if (r == -ENODATA)
2013 return 0;
2014 if (r < 0)
2015 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2016
0d411b7f
YW		 2017 if (master_ifindex == link->master_ifindex)
2018 return 0;
807667f7 2019
0d411b7f
YW		 2020 if (link->master_ifindex == 0)
2021 log_link_debug(link, "Joined to master interface: %i", master_ifindex);
2022 else if (master_ifindex == 0)
2023 log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex);
2024 else
2025 log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex);
807667f7 2026
0d411b7f 2027 link_drop_from_master(link);
807667f7 2028
0d411b7f 2029 link->master_ifindex = master_ifindex;
413708d1 2030
0d411b7f
YW		 2031 r = link_append_to_master(link);
2032 if (r < 0)
2033 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2034
0d411b7f
YW		 2035 return 0;
2036}
807667f7 2037
0d411b7f 2038static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2039 struct hw_addr_data addr;
0d411b7f 2040 int r;
d93d655c 2041
0d411b7f
YW		 2042 assert(link);
2043 assert(message);
dfc58b47 2044
0d411b7f
YW		 2045 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2046 if (r < 0 && r != -ENODATA)
2047 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2048
e2bacccd 2049 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2050 if (r == -ENODATA)
2051 return 0;
2052 if (r < 0)
fe321d45 2053 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2054
e2bacccd 2055 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2056 return 0;
a61bb41c 2057
e2bacccd
YW		 2058 if (hw_addr_is_null(&link->hw_addr))
2059 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45
YW		 2060 else {
2061 log_link_debug(link, "Hardware address is changed: %s → %s",
e2bacccd 2062 HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr));
0d411b7f 2063
e2bacccd
YW		 2064 if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link)
2065 hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr);
fe321d45
YW		 2066 }
2067
e2bacccd
YW		 2068 link->hw_addr = addr;
2069
fe321d45
YW		 2070 if (!hw_addr_is_null(&link->hw_addr)) {
2071 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2072 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2073 /* bonding master and its slaves have the same hardware address. */
2074 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2075 if (r < 0)
2076 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2077 }
0d411b7f 2078
76a86ffd
YW		 2079 r = ipv4ll_update_mac(link);
2080 if (r < 0)
2081 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2082
0d411b7f 2083 r = ipv4ll_update_mac(link);
a61bb41c 2084 if (r < 0)
0d411b7f 2085 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2086
0d411b7f
YW		 2087 r = dhcp4_update_mac(link);
2088 if (r < 0)
2089 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2090
0d411b7f
YW		 2091 r = dhcp6_update_mac(link);
2092 if (r < 0)
2093 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2094
2095 r = radv_update_mac(link);
2096 if (r < 0)
2097 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2098
2099 if (link->ndisc) {
ca2b7cd8 2100 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2101 if (r < 0)
0d411b7f
YW		 2102 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2103 }
d236718c 2104
0d411b7f 2105 if (link->lldp) {
ca2b7cd8 2106 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.ether);
61135582 2107 if (r < 0)
0d411b7f 2108 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP: %m");
61135582
DS		 2109 }
2110
0d411b7f
YW		 2111 return 0;
2112}
a61bb41c 2113
0d411b7f 2114static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2115 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2116 int r;
a61bb41c 2117
0d411b7f
YW		 2118 assert(link);
2119 assert(message);
2120
2121 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2122 if (r == -ENODATA)
2123 return 0;
2124 if (r < 0)
2125 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2126 if (mtu == 0)
2127 return 0;
0d411b7f 2128
717ba5fc
YW		 2129 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2130 if (r < 0 && r != -ENODATA)
2131 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2132
2133 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2134 if (r < 0 && r != -ENODATA)
2135 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2136
717ba5fc
YW		 2137 if (max_mtu == 0)
2138 max_mtu = UINT32_MAX;
2139
2140 link->min_mtu = min_mtu;
2141 link->max_mtu = max_mtu;
2142
0d411b7f
YW		 2143 if (link->original_mtu == 0) {
2144 link->original_mtu = mtu;
717ba5fc
YW		 2145 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2146 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2147 }
2148
717ba5fc
YW		 2149 if (link->mtu == mtu)
2150 return 0;
2151
b5d0fd1e
YW		 2152 if (link->mtu != 0)
2153 log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2154 link->mtu, mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2155
2156 link->mtu = mtu;
2157
2158 if (link->dhcp_client) {
2159 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2160 if (r < 0)
0d411b7f
YW		 2161 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2162 }
a61bb41c 2163
0d411b7f
YW		 2164 if (link->radv) {
2165 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2166 if (r < 0)
0d411b7f 2167 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2168 }
2169
2170 return 0;
dd3efc09 2171}
fe8db0c5 2172
0d411b7f
YW		 2173static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2174 _cleanup_strv_free_ char **altnames = NULL;
2175 char **n;
2176 int r;
2177
2178 assert(link);
2179 assert(message);
2180
2181 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2182 if (r < 0 && r != -ENODATA)
2183 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2184
2185 STRV_FOREACH(n, link->alternative_names)
2186 hashmap_remove(link->manager->links_by_name, *n);
2187
2188 strv_free_and_replace(link->alternative_names, altnames);
2189
2190 STRV_FOREACH(n, link->alternative_names) {
2191 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2192 if (r < 0)
2193 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2194 }
2195
2196 return 0;
2197}
2198
2199static int link_update_name(Link *link, sd_netlink_message *message) {
176b8be1 2200 char ifname_from_index[IF_NAMESIZE + 1];
0d411b7f
YW		 2201 const char *ifname;
2202 int r;
2203
2204 assert(link);
2205 assert(message);
2206
2207 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2208 if (r == -ENODATA)
7802194a 2209 /* Hmm?? But ok. */
0d411b7f
YW		 2210 return 0;
2211 if (r < 0)
2212 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2213
2214 if (streq(ifname, link->ifname))
2215 return 0;
2216
176b8be1
YW		 2217 if (!format_ifname(link->ifindex, ifname_from_index))
2218 return log_link_debug_errno(link, SYNTHETIC_ERRNO(ENXIO), "Could not get interface name for index %i.", link->ifindex);
2219
2220 if (!streq(ifname, ifname_from_index)) {
2221 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2222 "with the name currently configured on the actual interface '%s'. Ignoring.",
2223 ifname, ifname_from_index);
2224 return 0;
2225 }
2226
0d411b7f
YW		 2227 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2228
2229 hashmap_remove(link->manager->links_by_name, link->ifname);
2230
2231 r = free_and_strdup(&link->ifname, ifname);
2232 if (r < 0)
2233 return log_oom_debug();
2234
2235 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2236 if (r < 0)
2237 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2238
54d1fdb2
YW		 2239 if (link->dhcp_client) {
2240 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2241 if (r < 0)
2242 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2243 }
2244
2245 if (link->dhcp6_client) {
2246 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2247 if (r < 0)
2248 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2249 }
2250
2251 if (link->ndisc) {
2252 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2253 if (r < 0)
2254 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2255 }
2256
2257 if (link->dhcp_server) {
2258 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2259 if (r < 0)
2260 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2261 }
2262
2263 if (link->radv) {
2264 r = sd_radv_set_ifname(link->radv, link->ifname);
2265 if (r < 0)
2266 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2267 }
2268
2269 if (link->lldp) {
2270 r = sd_lldp_set_ifname(link->lldp, link->ifname);
2271 if (r < 0)
2272 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP: %m");
2273 }
2274
2275 if (link->ipv4ll) {
2276 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2277 if (r < 0)
2278 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2279 }
2280
2281 Address *a;
2282 SET_FOREACH(a, link->addresses_ipv4acd) {
2283 r = sd_ipv4acd_set_ifname(a->acd, link->ifname);
2284 if (r < 0)
2285 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
2286 }
2287
0d411b7f
YW		 2288 return 0;
2289}
2290
2291static int link_update(Link *link, sd_netlink_message *message) {
2292 int r;
2293
2294 assert(link);
2295 assert(message);
2296
2297 r = link_update_name(link, message);
2298 if (r < 0)
2299 return r;
2300
2301 r = link_update_alternative_names(link, message);
2302 if (r < 0)
2303 return r;
2304
2305 r = link_update_mtu(link, message);
2306 if (r < 0)
2307 return r;
2308
2309 r = link_update_hardware_address(link, message);
2310 if (r < 0)
2311 return r;
2312
2313 r = link_update_master(link, message);
2314 if (r < 0)
2315 return r;
2316
2317 return link_update_flags(link, message);
2318}
2319
0c9ee5d5
YW		 2320static Link *link_drop_or_unref(Link *link) {
2321 if (!link)
2322 return NULL;
2323 if (!link->manager)
2324 return link_unref(link);
2325 return link_drop(link);
2326}
2327
2328DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2329
2330static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2331 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2332 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2333 unsigned short iftype;
2334 int r, ifindex;
0c9ee5d5
YW		 2335
2336 assert(manager);
2337 assert(message);
2338 assert(ret);
2339
0c9ee5d5
YW		 2340 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2341 if (r < 0)
0d411b7f 2342 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2343 else if (ifindex <= 0)
0d411b7f 2344 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2345
2346 r = sd_rtnl_message_link_get_type(message, &iftype);
2347 if (r < 0)
0d411b7f 2348 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2349
2350 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2351 if (r < 0)
0d411b7f 2352 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2353
2354 /* check for link kind */
2355 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2356 if (r >= 0) {
0d411b7f
YW		 2357 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2358 if (r < 0 && r != -ENODATA)
2359 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2360 r = sd_netlink_message_exit_container(message);
2361 if (r < 0)
0d411b7f 2362 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2363 }
2364
0d411b7f
YW		 2365 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2366 return log_oom_debug();
2367
2368 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2369 return log_oom_debug();
2370
2371 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2372 return log_oom_debug();
2373
0c9ee5d5
YW		 2374 link = new(Link, 1);
2375 if (!link)
2376 return -ENOMEM;
2377
2378 *link = (Link) {
2379 .n_ref = 1,
2380 .state = LINK_STATE_PENDING,
2381 .online_state = _LINK_ONLINE_STATE_INVALID,
2382 .ifindex = ifindex,
2383 .iftype = iftype,
2384 .ifname = TAKE_PTR(ifname),
2385 .kind = TAKE_PTR(kind),
2386
0d411b7f
YW		 2387 .state_file = TAKE_PTR(state_file),
2388 .lease_file = TAKE_PTR(lease_file),
2389 .lldp_file = TAKE_PTR(lldp_file),
2390
0c9ee5d5
YW		 2391 .n_dns = UINT_MAX,
2392 .dns_default_route = -1,
2393 .llmnr = _RESOLVE_SUPPORT_INVALID,
2394 .mdns = _RESOLVE_SUPPORT_INVALID,
2395 .dnssec_mode = _DNSSEC_MODE_INVALID,
2396 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2397 };
2398
6eab614d 2399 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2400 if (r < 0)
0d411b7f 2401 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2402
2403 link->manager = manager;
2404
0d411b7f 2405 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2406 if (r < 0)
0d411b7f 2407 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5
YW		 2408
2409 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2410 if (r < 0)
2411 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2412
2413 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2414 if (r < 0)
2415 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2416
0d411b7f 2417 log_link_debug(link, "Link %d added", link->ifindex);
0c9ee5d5 2418 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2419 return 0;
2420}
2421
0d411b7f 2422int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2423 Link *link = NULL;
2424 NetDev *netdev = NULL;
2425 uint16_t type;
2426 const char *name;
2427 int r, ifindex;
2428
2429 assert(rtnl);
2430 assert(message);
0d411b7f 2431 assert(manager);
3be9d62a
YW		 2432
2433 if (sd_netlink_message_is_error(message)) {
2434 r = sd_netlink_message_get_errno(message);
2435 if (r < 0)
2436 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2437
2438 return 0;
2439 }
2440
2441 r = sd_netlink_message_get_type(message, &type);
2442 if (r < 0) {
2443 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2444 return 0;
2445 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2446 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2447 return 0;
2448 }
2449
2450 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2451 if (r < 0) {
2452 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2453 return 0;
2454 } else if (ifindex <= 0) {
2455 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2456 return 0;
2457 }
2458
2459 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2460 if (r < 0) {
2461 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2462 return 0;
2463 }
2464
6eab614d 2465 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2466 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2467
2468 switch (type) {
2469 case RTM_NEWLINK:
0d411b7f
YW		 2470 if (netdev) {
2471 /* netdev exists, so make sure the ifindex matches */
2472 r = netdev_set_ifindex(netdev, message);
2473 if (r < 0) {
2474 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2475 return 0;
2476 }
2477 }
2478
3be9d62a
YW		 2479 if (!link) {
2480 /* link is new, so add it */
0d411b7f 2481 r = link_new(manager, message, &link);
3be9d62a 2482 if (r < 0) {
0d411b7f 2483 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2484 return 0;
2485 }
3be9d62a 2486
0d411b7f 2487 r = link_update(link, message);
3be9d62a 2488 if (r < 0) {
0d411b7f
YW		 2489 log_warning_errno(r, "Could not process link message: %m");
2490 link_enter_failed(link);
3be9d62a
YW		 2491 return 0;
2492 }
3be9d62a 2493
0d411b7f
YW		 2494 r = link_check_initialized(link);
2495 if (r < 0) {
2496 log_warning_errno(r, "Failed to check link is initialized: %m");
2497 link_enter_failed(link);
2498 return 0;
2499 }
2500 } else {
2501 r = link_update(link, message);
2502 if (r < 0) {
2503 log_warning_errno(r, "Could not process link message: %m");
2504 link_enter_failed(link);
2505 return 0;
2506 }
3be9d62a
YW		 2507 }
2508
2509 break;
2510
2511 case RTM_DELLINK:
2512 link_drop(link);
2513 netdev_drop(netdev);
2514
2515 break;
2516
2517 default:
04499a70 2518 assert_not_reached();
3be9d62a
YW		 2519 }
2520
2521 return 1;
2522}
2523
79c6e114
YW		 2524int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2525 uint16_t message_type;
2526 int r;
2527
2528 assert(m);
2529 assert(link);
2530 assert(error_msg);
2531
2532 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2533 return 0;
2534
2535 r = sd_netlink_message_get_errno(m);
2536 if (r < 0) {
2537 log_link_message_warning_errno(link, m, r, error_msg);
2538 link_enter_failed(link);
2539 return 0;
2540 }
2541
2542 r = sd_netlink_message_get_type(m, &message_type);
2543 if (r < 0) {
2544 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2545 return 0;
2546 }
2547 if (message_type != RTM_NEWLINK) {
2548 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2549 return 0;
2550 }
2551
2552 r = link_update(link, m);
2553 if (r < 0) {
2554 link_enter_failed(link);
2555 return 0;
2556 }
2557
2558 return 1;
2559}
2560
2561int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2562 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2563 int r;
2564
2565 assert(link);
2566 assert(link->manager);
2567 assert(link->manager->rtnl);
2568 assert(callback);
2569
2570 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2571 if (r < 0)
2572 return r;
2573
2574 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2575 link_netlink_destroy_callback, link);
2576 if (r < 0)
2577 return r;
2578
2579 link_ref(link);
2580 return 0;
2581}
2582
fe8db0c5 2583static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2584 [LINK_STATE_PENDING] = "pending",
bd08ce56 2585 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2586 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2587 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2588 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2589 [LINK_STATE_FAILED] = "failed",
370e9930 2590 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2591};
2592
2593DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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