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cryptsetup: handle more gracefully if "keyslots" LUKS2 JSON header field is invalid
[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 211
35778343 212 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 213 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
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 240 link->nexthops = set_free(link->nexthops);
c16c7808 241
8eec0b9d 242 link->neighbors = set_free(link->neighbors);
d1bdafd2 243
8eec0b9d
YW		 244 link->addresses = set_free(link->addresses);
245 link->addresses_foreign = set_free(link->addresses_foreign);
76a86ffd 246 link->addresses_ipv4acd = set_free(link->addresses_ipv4acd);
aa651e88 247 link->pool_addresses = set_free(link->pool_addresses);
e5526518 248 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 249 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
250 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
251 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
252 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 253 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 254
4b409e85
YW		 255 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
256
1a6bb31f 257 link_free_engines(link);
49699bac 258
c166a070 259 free(link->ifname);
572b21d9 260 strv_free(link->alternative_names);
ceac4078 261 free(link->kind);
8d968fdd 262 free(link->ssid);
c643bda5 263 free(link->driver);
6cad256d 264
a34e58d4
YW		 265 unlink_and_free(link->lease_file);
266 unlink_and_free(link->lldp_file);
267 unlink_and_free(link->state_file);
c166a070 268
51517f9e 269 sd_device_unref(link->sd_device);
b5db00e5 270
0d4ad91d 271 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 272 hashmap_free(link->bound_by_links);
273
5f707e12 274 set_free_with_destructor(link->slaves, link_unref);
033295c1 275
c9c908a6
YW		 276 network_unref(link->network);
277
8301aa0b 278 return mfree(link);
14b746f7
TG		 279}
280
8301aa0b 281DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 282
6eab614d 283int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 284 Link *link;
11a7f229
TG		 285
286 assert(m);
e856ed00 287 assert(ifindex > 0);
11a7f229 288
6eab614d 289 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 290 if (!link)
291 return -ENODEV;
292
0b54c870
YW		 293 if (ret)
294 *ret = link;
295 return 0;
296}
297
298int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
299 Link *link;
300
301 assert(m);
302 assert(ifname);
11a7f229 303
0b54c870
YW		 304 link = hashmap_get(m->links_by_name, ifname);
305 if (!link)
306 return -ENODEV;
307
308 if (ret)
309 *ret = link;
11a7f229
TG		 310 return 0;
311}
312
fe321d45
YW		 313int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
314 Link *link;
315
316 assert(m);
317 assert(hw_addr);
318
319 link = hashmap_get(m->links_by_hw_addr, hw_addr);
320 if (!link)
321 return -ENODEV;
322
323 if (ret)
324 *ret = link;
325 return 0;
326}
327
81357285
YW		 328int link_get_master(Link *link, Link **ret) {
329 assert(link);
330 assert(link->manager);
331 assert(ret);
332
333 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
334 return -ENODEV;
335
6eab614d 336 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 337}
338
af9ba57a 339void link_set_state(Link *link, LinkState state) {
e331e246
TG		 340 assert(link);
341
342 if (link->state == state)
343 return;
344
0beb9542
YW		 345 log_link_debug(link, "State changed: %s -> %s",
346 link_state_to_string(link->state),
347 link_state_to_string(state));
348
e331e246
TG		 349 link->state = state;
350
351 link_send_changed(link, "AdministrativeState", NULL);
9092113d 352 link_dirty(link);
e331e246
TG		 353}
354
2a99eed0 355int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 356 int r = 0, k;
357
358 assert(link);
359 assert(link->manager);
360 assert(link->manager->event);
361
80060352
ZJS		 362 bool keep_dhcp = may_keep_dhcp &&
363 link->network &&
76a86ffd 364 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 365 (link->manager->restarting ||
366 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
367
84add3cd 368 if (!keep_dhcp) {
111bb8f9 369 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 370 if (k < 0)
36c7d709 371 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 372 }
373
2a99eed0
YW		 374 k = sd_dhcp_server_stop(link->dhcp_server);
375 if (k < 0)
376 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
377
35778343 378 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 379 if (k < 0)
c01b9b87
YW		 380 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
381
382 k = sd_lldp_tx_stop(link->lldp_tx);
383 if (k < 0)
384 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 385
84add3cd
YW		 386 k = sd_ipv4ll_stop(link->ipv4ll);
387 if (k < 0)
388 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 389
76a86ffd 390 k = ipv4acd_stop(link);
2488e4d9
YW		 391 if (k < 0)
392 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 393
84add3cd
YW		 394 k = sd_dhcp6_client_stop(link->dhcp6_client);
395 if (k < 0)
396 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 397
2ffd6d73
YW		 398 k = dhcp6_pd_remove(link);
399 if (k < 0)
400 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 401
84add3cd
YW		 402 k = sd_ndisc_stop(link->ndisc);
403 if (k < 0)
404 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 405
84add3cd
YW		 406 k = sd_radv_stop(link->radv);
407 if (k < 0)
408 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 409
111bb8f9
TG		 410 return r;
411}
412
b22d8a00 413void link_enter_failed(Link *link) {
ef1ba606 414 assert(link);
f882c247 415
370e9930 416 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 417 return;
418
6a7a4e4d 419 log_link_warning(link, "Failed");
449f7554 420
e331e246 421 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 422
2a99eed0 423 (void) link_stop_engines(link, false);
f882c247
TG		 424}
425
6accfd31
DA		 426void link_check_ready(Link *link) {
427 Address *a;
6accfd31
DA		 428
429 assert(link);
430
5f58af25
YW		 431 if (link->state == LINK_STATE_CONFIGURED)
432 return;
433
d19b9939
YW		 434 if (link->state != LINK_STATE_CONFIGURING)
435 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 436
437 if (!link->network)
a7f07cbe 438 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 439
7558f9e7
YW		 440 if (!link->tc_configured)
441 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 442
a7f07cbe
YW		 443 if (link->set_link_messages > 0)
444 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
445
446 if (!link->activated)
447 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
448
7558f9e7
YW		 449 if (link->iftype == ARPHRD_CAN) {
450 /* let's shortcut things for CAN which doesn't need most of checks below. */
451 link_set_state(link, LINK_STATE_CONFIGURED);
452 return;
453 }
454
76c5a0f2 455 if (!link->static_addresses_configured)
d19b9939 456 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 457
90e74a66 458 SET_FOREACH(a, link->addresses)
39373cb9
YW		 459 if (!address_is_ready(a)) {
460 _cleanup_free_ char *str = NULL;
461
5380707a
YW		 462 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
463 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 464 }
6aa5773b 465
354bc760
YW		 466 if (!link->static_address_labels_configured)
467 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
468
e5b35bf6
YW		 469 if (!link->static_bridge_fdb_configured)
470 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
471
ff9e0783
YW		 472 if (!link->static_bridge_mdb_configured)
473 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
474
fdeba3f5
YW		 475 if (!link->static_ipv6_proxy_ndp_configured)
476 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
477
40ca350e
YW		 478 if (!link->static_neighbors_configured)
479 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
480
d19b9939
YW		 481 if (!link->static_nexthops_configured)
482 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 483
76c5a0f2
YW		 484 if (!link->static_routes_configured)
485 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
486
0e5ef6be 487 if (!link->static_routing_policy_rules_configured)
d19b9939 488 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 489
d19b9939
YW		 490 if (!link->sr_iov_configured)
491 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 492
4bcb8625
YW		 493 /* IPv6LL is assigned after the link gains its carrier. */
494 if (!link->network->configure_without_carrier &&
495 link_ipv6ll_enabled(link) &&
496 !in6_addr_is_set(&link->ipv6ll_address))
497 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
498
499 bool has_ndisc_address = false;
500 NDiscAddress *n;
501 SET_FOREACH(n, link->ndisc_addresses)
502 if (!n->marked) {
503 has_ndisc_address = true;
504 break;
505 }
50550722 506
4bcb8625
YW		 507 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
508 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
509 !link->ipv4ll_address_configured)
510 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
87160186 511 return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
4bcb8625
YW		 512
513 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
514 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
515 (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link)) ||
516 link_ipv4ll_enabled(link)) {
517
518 if (!link->dhcp4_configured &&
519 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
520 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
521 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da 522 !link->ipv4ll_address_configured)
4bcb8625
YW		 523 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
524 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
525
87160186
YW		 526 log_link_debug(link, "%s(): DHCPv4:%s IPv4LL:%s DHCPv6_addresses:%s DHCPv6_routes:%s "
527 "DHCPv6PD_addresses:%s DHCPv6PD_routes:%s NDisc_addresses:%s NDisc_routes:%s",
4bcb8625
YW		 528 __func__,
529 yes_no(link->dhcp4_configured),
530 yes_no(link->ipv4ll_address_configured),
531 yes_no(link->dhcp6_address_configured),
532 yes_no(link->dhcp6_route_configured),
533 yes_no(link->dhcp6_pd_address_configured),
534 yes_no(link->dhcp6_pd_route_configured),
535 yes_no(link->ndisc_addresses_configured),
536 yes_no(link->ndisc_routes_configured));
463797c1 537 }
6accfd31 538
29836c16 539 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 540}
541
97108953 542static int link_request_static_configs(Link *link) {
f882c247
TG		 543 int r;
544
545 assert(link);
546 assert(link->network);
f5be5601 547 assert(link->state != _LINK_STATE_INVALID);
f882c247 548
354bc760 549 r = link_request_static_addresses(link);
0e5ef6be
YW		 550 if (r < 0)
551 return r;
552
354bc760 553 r = link_request_static_address_labels(link);
f3ef324d
YW		 554 if (r < 0)
555 return r;
e4a71bf3 556
e5b35bf6
YW		 557 r = link_request_static_bridge_fdb(link);
558 if (r < 0)
559 return r;
560
9a038aac
YW		 561 r = link_request_static_bridge_mdb(link);
562 if (r < 0)
563 return r;
564
fdeba3f5
YW		 565 r = link_request_static_ipv6_proxy_ndp_addresses(link);
566 if (r < 0)
567 return r;
568
40ca350e 569 r = link_request_static_neighbors(link);
682c65b0
YW		 570 if (r < 0)
571 return r;
bd6379ec 572
76c5a0f2 573 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 574 if (r < 0)
575 return r;
f882c247 576
76c5a0f2
YW		 577 r = link_request_static_routes(link, false);
578 if (r < 0)
579 return r;
580
581 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 582 if (r < 0)
583 return r;
d4cdbea5 584
f882c247
TG		 585 return 0;
586}
587
1187fc33
YW		 588static int link_request_stacked_netdevs(Link *link) {
589 NetDev *netdev;
e16e4b3b
DS		 590 int r;
591
592 assert(link);
593
1187fc33
YW		 594 link->stacked_netdevs_created = false;
595 link->stacked_netdevs_after_configured_created = false;
e16e4b3b 596
1187fc33 597 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 598 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 599 if (r < 0)
600 return r;
601 }
e16e4b3b 602
1187fc33
YW		 603 if (link->create_stacked_netdev_messages == 0)
604 link->stacked_netdevs_created = true;
605 if (link->create_stacked_netdev_after_configured_messages == 0)
606 link->stacked_netdevs_after_configured_created = true;
e16e4b3b
DS		 607
608 return 0;
609}
610
8566df79 611static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 612 int r;
613
614 assert(link);
615
086b8853 616 if (link->radv) {
7465dd22 617 assert(link->radv);
94876904 618 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 619
620 log_link_debug(link, "Starting IPv6 Router Advertisements");
621
622 r = sd_radv_start(link->radv);
a254fab2 623 if (r < 0)
7465dd22
PF		 624 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
625 }
626
294f129b
YW		 627 r = ndisc_start(link);
628 if (r < 0)
629 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 630
294f129b
YW		 631 r = dhcp6_start(link);
632 if (r < 0)
633 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 634
1633c457
YW		 635 r = dhcp6_request_prefix_delegation(link);
636 if (r < 0)
637 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 638
e7ab854c
TG		 639 return 0;
640}
641
8566df79 642static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 643 int r;
644
645 assert(link);
ff254138
TG		 646 assert(link->manager);
647 assert(link->manager->event);
648
0107b769 649 if (link->dhcp_client) {
294f129b 650 r = dhcp4_start(link);
0107b769 651 if (r < 0)
294f129b 652 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 653
ccffa166 654 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 655
ccffa166 656 } else if (link->ipv4ll) {
5c1d3fc9 657 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 658 if (r < 0)
659 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 660
661 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 662 }
663
ab486ef4
YW		 664 if (link->dhcp_server) {
665 r = sd_dhcp_server_start(link->dhcp_server);
666 if (r < 0)
667 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
668 }
669
76a86ffd
YW		 670 r = ipv4acd_start(link);
671 if (r < 0)
672 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
673
6fc25497
SS		 674 return 0;
675}
676
8566df79 677static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 678 int r;
679
680 assert(link);
681
8566df79 682 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 683 if (r < 0)
684 return r;
685
94876904 686 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 687 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 688 if (r < 0)
689 return r;
690 }
691
c01b9b87
YW		 692 if (link->lldp_tx) {
693 r = sd_lldp_tx_start(link->lldp_tx);
694 if (r < 0)
695 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
696 }
8e1ad1ea 697
35778343
YW		 698 if (link->lldp_rx) {
699 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 700 if (r < 0)
701 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
702 }
703
ff254138
TG		 704 return 0;
705}
706
7657ec3e 707int link_ipv6ll_gained(Link *link) {
0c9ee5d5 708 int r;
deb2e523 709
0c9ee5d5 710 assert(link);
deb2e523 711
0c9ee5d5 712 log_link_info(link, "Gained IPv6LL");
deb2e523 713
7657ec3e
YW		 714 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
715 return 0;
0c9ee5d5 716
7657ec3e
YW		 717 r = link_acquire_dynamic_ipv6_conf(link);
718 if (r < 0)
719 return r;
0c9ee5d5 720
7657ec3e 721 link_check_ready(link);
0c9ee5d5 722 return 0;
deb2e523
TG		 723}
724
112a0972 725int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 726 bool required_up = false;
727 bool link_is_up = false;
852a3916 728 Link *l;
0d4ad91d
AR		 729
730 assert(link);
731
ad82f0c3
YW		 732 /* If at least one interface in bound_to_links has carrier, then make this interface up.
733 * If all interfaces in bound_to_links do not, then make this interface down. */
734
0d4ad91d
AR		 735 if (hashmap_isempty(link->bound_to_links))
736 return 0;
737
738 if (link->flags & IFF_UP)
739 link_is_up = true;
740
852a3916 741 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 742 if (link_has_carrier(l)) {
743 required_up = true;
744 break;
745 }
746
852a3916 747 if (!required_up && link_is_up)
68f52063 748 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 749 if (required_up && !link_is_up)
68f52063 750 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 751
752 return 0;
753}
754
755static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 756 Link *l;
757 int r;
758
759 assert(link);
760
ad82f0c3
YW		 761 /* Update up or down state of interfaces which depend on this interface's carrier state. */
762
0d4ad91d
AR		 763 if (hashmap_isempty(link->bound_by_links))
764 return 0;
765
852a3916 766 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 767 r = link_handle_bound_to_list(l);
768 if (r < 0)
769 return r;
770 }
771
772 return 0;
773}
774
775static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
776 int r;
777
778 assert(link);
779 assert(carrier);
780
781 if (link == carrier)
782 return 0;
783
784 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
785 return 0;
786
190b3b5c 787 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 788 if (r < 0)
789 return r;
790
9092113d
YW		 791 link_dirty(link);
792
0d4ad91d
AR		 793 return 0;
794}
795
796static int link_new_bound_by_list(Link *link) {
797 Manager *m;
798 Link *carrier;
0d4ad91d 799 int r;
0d4ad91d
AR		 800
801 assert(link);
802 assert(link->manager);
803
804 m = link->manager;
805
6eab614d 806 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 807 if (!carrier->network)
808 continue;
809
810 if (strv_isempty(carrier->network->bind_carrier))
811 continue;
812
191a3f16 813 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 814 r = link_put_carrier(link, carrier, &link->bound_by_links);
815 if (r < 0)
816 return r;
0d4ad91d
AR		 817 }
818 }
819
90e74a66 820 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 821 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
822 if (r < 0)
823 return r;
0d4ad91d
AR		 824 }
825
826 return 0;
827}
828
829static int link_new_bound_to_list(Link *link) {
830 Manager *m;
831 Link *carrier;
0d4ad91d 832 int r;
0d4ad91d
AR		 833
834 assert(link);
835 assert(link->manager);
836
837 if (!link->network)
838 return 0;
839
840 if (strv_isempty(link->network->bind_carrier))
841 return 0;
842
843 m = link->manager;
844
6eab614d 845 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 846 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 847 r = link_put_carrier(link, carrier, &link->bound_to_links);
848 if (r < 0)
849 return r;
0d4ad91d
AR		 850 }
851 }
852
852a3916 853 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 854 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
855 if (r < 0)
856 return r;
0d4ad91d
AR		 857 }
858
859 return 0;
860}
861
862static int link_new_carrier_maps(Link *link) {
863 int r;
864
865 r = link_new_bound_by_list(link);
866 if (r < 0)
867 return r;
868
869 r = link_handle_bound_by_list(link);
870 if (r < 0)
871 return r;
872
873 r = link_new_bound_to_list(link);
874 if (r < 0)
875 return r;
876
852a3916 877 return link_handle_bound_to_list(link);
0d4ad91d
AR		 878}
879
880static void link_free_bound_to_list(Link *link) {
9092113d 881 bool updated = false;
0d4ad91d 882 Link *bound_to;
0d4ad91d 883
9092113d
YW		 884 assert(link);
885
886 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
887 updated = true;
0d4ad91d
AR		 888
889 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 890 link_dirty(bound_to);
0d4ad91d
AR		 891 }
892
9092113d
YW		 893 if (updated)
894 link_dirty(link);
0d4ad91d
AR		 895}
896
897static void link_free_bound_by_list(Link *link) {
9092113d 898 bool updated = false;
0d4ad91d 899 Link *bound_by;
0d4ad91d 900
9092113d
YW		 901 assert(link);
902
903 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
904 updated = true;
0d4ad91d
AR		 905
906 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 907 link_dirty(bound_by);
0d4ad91d
AR		 908 link_handle_bound_to_list(bound_by);
909 }
910 }
911
9092113d
YW		 912 if (updated)
913 link_dirty(link);
0d4ad91d
AR		 914}
915
916static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 917 assert(link);
918
9092113d
YW		 919 link_free_bound_to_list(link);
920 link_free_bound_by_list(link);
0d4ad91d
AR		 921}
922
81357285 923static int link_append_to_master(Link *link) {
5f707e12
YW		 924 Link *master;
925 int r;
926
927 assert(link);
5f707e12 928
81357285
YW		 929 /* - The link may have no master.
930 * - RTM_NEWLINK message about master interface may not be received yet. */
931 if (link_get_master(link, &master) < 0)
932 return 0;
5f707e12 933
de7fef4b 934 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 935 if (r <= 0)
5f707e12
YW		 936 return r;
937
938 link_ref(link);
939 return 0;
940}
941
81357285 942static void link_drop_from_master(Link *link) {
5f707e12
YW		 943 Link *master;
944
945 assert(link);
946
81357285 947 if (!link->manager)
5f707e12
YW		 948 return;
949
81357285 950 if (link_get_master(link, &master) < 0)
5f707e12
YW		 951 return;
952
953 link_unref(set_remove(master->slaves, link));
954}
955
56001f02
YW		 956static void link_drop_requests(Link *link) {
957 Request *req;
958
959 assert(link);
960 assert(link->manager);
961
962 ORDERED_SET_FOREACH(req, link->manager->request_queue)
963 if (req->link == link)
964 request_drop(req);
965}
966
cc2d7efc 967static Link *link_drop(Link *link) {
0b54c870
YW		 968 char **n;
969
63130eb3 970 if (!link)
cc2d7efc 971 return NULL;
0d4ad91d 972
63130eb3
YW		 973 assert(link->manager);
974
0d4ad91d
AR		 975 link_set_state(link, LINK_STATE_LINGER);
976
63130eb3
YW		 977 /* Drop all references from other links and manager. Note that async netlink calls may have
978 * references to the link, and they will be dropped when we receive replies. */
979
56001f02
YW		 980 link_drop_requests(link);
981
0d4ad91d
AR		 982 link_free_carrier_maps(link);
983
81357285 984 link_drop_from_master(link);
5f707e12 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
5e3bb5da
YW		 1008 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
1009 * to remove loopback address or addresses used for root NFS. */
1010
1011 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
1012 return 0;
1013 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
1014 return 0;
1015 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
1016 return 0;
1017
e36d601c 1018 r = link_drop_foreign_routes(link);
5e5b137a 1019
e36d601c 1020 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 1021 if (k < 0 && r >= 0)
1022 r = k;
1023
e36d601c 1024 k = link_drop_foreign_addresses(link);
0b81225e
YW		 1025 if (k < 0 && r >= 0)
1026 r = k;
d1bdafd2 1027
e36d601c 1028 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 1029 if (k < 0 && r >= 0)
1030 r = k;
1031
0b81225e
YW		 1032 k = manager_drop_foreign_routing_policy_rules(link->manager);
1033 if (k < 0 && r >= 0)
1034 r = k;
1035
1036 return r;
5e5b137a
TG		 1037}
1038
3104883d 1039static int link_drop_config(Link *link) {
0b81225e
YW		 1040 int k, r;
1041
1042 assert(link);
1043 assert(link->manager);
3104883d 1044
e36d601c 1045 r = link_drop_routes(link);
3104883d 1046
e36d601c 1047 k = link_drop_nexthops(link);
0b81225e
YW		 1048 if (k < 0 && r >= 0)
1049 r = k;
d1bdafd2 1050
e36d601c 1051 k = link_drop_addresses(link);
0b81225e
YW		 1052 if (k < 0 && r >= 0)
1053 r = k;
1054
e36d601c 1055 k = link_drop_neighbors(link);
25b82b6e
YW		 1056 if (k < 0 && r >= 0)
1057 r = k;
1058
0b81225e
YW		 1059 k = manager_drop_routing_policy_rules(link->manager, link);
1060 if (k < 0 && r >= 0)
1061 r = k;
3104883d 1062
c69305ff
LP		 1063 ndisc_flush(link);
1064
0b81225e 1065 return r;
3104883d
SS		 1066}
1067
c3b94251 1068static int link_configure(Link *link) {
4ecdcb07
YW		 1069 int r;
1070
ef1ba606 1071 assert(link);
b22d8a00 1072 assert(link->network);
bd08ce56 1073 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1074
1187fc33
YW		 1075 link_set_state(link, LINK_STATE_CONFIGURING);
1076
34658df2 1077 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1078 if (r < 0)
1079 return r;
1080
7558f9e7
YW		 1081 if (link->iftype == ARPHRD_CAN) {
1082 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1083 r = link_request_to_set_can(link);
1084 if (r < 0)
1085 return r;
1086
1087 return link_request_to_activate(link);
1088 }
1089
518cd6b5
SS		 1090 r = link_configure_sr_iov(link);
1091 if (r < 0)
1092 return r;
1093
5e0534f1 1094 r = link_set_sysctl(link);
b69c3180
SS		 1095 if (r < 0)
1096 return r;
8749cbcd 1097
d05c332c 1098 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1099 if (r < 0)
1100 return r;
1101
1187fc33 1102 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1103 if (r < 0)
1104 return r;
1105
1187fc33 1106 r = link_request_to_set_group(link);
99d2baa2
SS		 1107 if (r < 0)
1108 return r;
1109
1187fc33
YW		 1110 r = link_configure_mtu(link);
1111 if (r < 0)
1112 return r;
1113
1114 r = link_request_to_set_addrgen_mode(link);
1115 if (r < 0)
1116 return r;
1117
1118 r = link_request_to_set_master(link);
1119 if (r < 0)
1120 return r;
1121
1122 r = link_request_stacked_netdevs(link);
1123 if (r < 0)
1124 return r;
1125
1126 r = link_request_to_set_bond(link);
1127 if (r < 0)
1128 return r;
1129
1130 r = link_request_to_set_bridge(link);
1131 if (r < 0)
1132 return r;
1133
1134 r = link_request_to_set_bridge_vlan(link);
1135 if (r < 0)
1136 return r;
1137
1138 r = link_request_to_activate(link);
89fe6535
SS		 1139 if (r < 0)
1140 return r;
1141
2ffd6d73
YW		 1142 r = ipv4ll_configure(link);
1143 if (r < 0)
1144 return r;
64b21ece 1145
ccffa166 1146 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1147 if (r < 0)
1148 return r;
eb34d4af 1149
ccffa166 1150 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1151 if (r < 0)
1152 return r;
f5a8c43f 1153
2ffd6d73
YW		 1154 r = ndisc_configure(link);
1155 if (r < 0)
1156 return r;
4138fb2c 1157
1d28a3cf
YW		 1158 r = link_request_dhcp_server(link);
1159 if (r < 0)
1160 return r;
1161
a254fab2 1162 r = link_request_radv(link);
086b8853
YW		 1163 if (r < 0)
1164 return r;
7465dd22 1165
2ffd6d73
YW		 1166 r = link_lldp_rx_configure(link);
1167 if (r < 0)
1168 return r;
ce43e484 1169
c01b9b87
YW		 1170 r = link_lldp_tx_configure(link);
1171 if (r < 0)
1172 return r;
1173
5e3bb5da
YW		 1174 r = link_drop_foreign_config(link);
1175 if (r < 0)
1176 return r;
4c649652 1177
1187fc33
YW		 1178 r = link_request_static_configs(link);
1179 if (r < 0)
1180 return r;
1181
1182 if (!link_has_carrier(link))
1183 return 0;
1184
1185 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1186}
1187
170e88c8
YW		 1188static int link_get_network(Link *link, Network **ret) {
1189 Network *network;
1a3caa49 1190 int r;
170e88c8
YW		 1191
1192 assert(link);
1193 assert(link->manager);
1194 assert(ret);
1195
1196 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1197 bool warn = false;
1198
1a3caa49 1199 r = net_match_config(
170e88c8
YW		 1200 &network->match,
1201 link->sd_device,
ca2b7cd8 1202 &link->hw_addr.ether,
170e88c8
YW		 1203 &link->permanent_mac,
1204 link->driver,
1205 link->iftype,
1206 link->ifname,
1207 link->alternative_names,
1208 link->wlan_iftype,
1209 link->ssid,
1a3caa49
YW		 1210 &link->bssid);
1211 if (r < 0)
1212 return r;
1213 if (r == 0)
170e88c8
YW		 1214 continue;
1215
1216 if (network->match.ifname && link->sd_device) {
1217 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1218 const char *attr;
1219
1220 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1221 (void) safe_atou8(attr, &name_assign_type);
1222
1223 warn = name_assign_type == NET_NAME_ENUM;
1224 }
1225
1226 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1227 "found matching network '%s'%s.",
1228 network->filename,
1229 warn ? ", based on potentially unpredictable interface name" : "");
1230
1231 if (network->unmanaged)
1232 return -ENOENT;
1233
1234 *ret = network;
1235 return 0;
1236 }
1237
1238 return -ENOENT;
1239}
1240
7f80fa12 1241static int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1242 Network *network = NULL;
ad932b15
YW		 1243 int r;
1244
5a1860f7 1245 assert(link);
572b21d9 1246
170e88c8 1247 r = link_get_network(link, &network);
cb71e9c6 1248 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1249 return r;
1250
99b8517c 1251 if (link->network == network && !force)
ad932b15
YW		 1252 return 0;
1253
cb71e9c6
YW		 1254 if (network)
1255 log_link_info(link, "Reconfiguring with %s.", network->filename);
1256 else
1257 log_link_info(link, "Unmanaging interface.");
ad932b15
YW		 1258
1259 /* Dropping old .network file */
2a99eed0 1260 r = link_stop_engines(link, false);
572b21d9 1261 if (r < 0)
ad932b15 1262 return r;
ad932b15 1263
19d9a5ad
YW		 1264 link_drop_requests(link);
1265
ad932b15
YW		 1266 r = link_drop_config(link);
1267 if (r < 0)
1268 return r;
1269
ad932b15
YW		 1270 link_free_carrier_maps(link);
1271 link_free_engines(link);
1272 link->network = network_unref(link->network);
1273
cb71e9c6
YW		 1274 if (!network) {
1275 link_set_state(link, LINK_STATE_UNMANAGED);
1276 return 0;
1277 }
1278
ad932b15 1279 /* Then, apply new .network file */
9092113d 1280 link->network = network_ref(network);
b156a95d 1281 link_update_operstate(link, true);
9092113d 1282 link_dirty(link);
ad932b15
YW		 1283
1284 r = link_new_carrier_maps(link);
1285 if (r < 0)
1286 return r;
1287
1288 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1289 link->activated = false;
ad932b15 1290
ad932b15
YW		 1291 r = link_configure(link);
1292 if (r < 0)
1293 return r;
1294
0e397560 1295 return 1;
ad932b15
YW		 1296}
1297
d09a179e
YW		 1298static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force, bool update_wifi) {
1299 bool link_was_lower_up;
572b21d9
YW		 1300 int r;
1301
d09a179e
YW		 1302 assert(link);
1303
1304 link_was_lower_up = link->flags & IFF_LOWER_UP;
1305
5a1860f7
YW		 1306 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1307 if (r <= 0)
1308 return r;
1309
d09a179e
YW		 1310 if (update_wifi && link_was_lower_up && link->flags & IFF_LOWER_UP) {
1311 /* If the interface's L1 was not up, then wifi_get_info() is already called in
1312 * link_update_flags(). So, it is not necessary to re-call here. */
1313 r = wifi_get_info(link);
1314 if (r < 0) {
1315 link_enter_failed(link);
1316 return 0;
1317 }
1318 }
1319
7f80fa12 1320 r = link_reconfigure_impl(link, force);
d09a179e 1321 if (r < 0) {
572b21d9 1322 link_enter_failed(link);
d09a179e
YW		 1323 return 0;
1324 }
572b21d9 1325
d09a179e 1326 return r;
572b21d9
YW		 1327}
1328
5a1860f7 1329static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
d09a179e 1330 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false, /* update_wifi = */ false);
5a1860f7 1331}
572b21d9 1332
5a1860f7 1333static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
d09a179e 1334 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true, /* update_wifi = */ false);
572b21d9
YW		 1335}
1336
d09a179e 1337static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9
YW		 1338 int r;
1339
d09a179e
YW		 1340 assert(link);
1341
1342 r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false, /* update_wifi = */ true);
1343 if (r != 0)
1344 return r;
1345
1346 /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */
1347 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
1348 return 0;
1349
1350 /* re-request static configs, and restart engines. */
1351 r = link_stop_engines(link, false);
1352 if (r < 0) {
1353 link_enter_failed(link);
1354 return 0;
1355 }
1356
1357 r = link_acquire_dynamic_conf(link);
1358 if (r < 0) {
1359 link_enter_failed(link);
1360 return 0;
1361 }
1362
1363 r = link_request_static_configs(link);
1364 if (r < 0) {
1365 link_enter_failed(link);
1366 return 0;
1367 }
1368
1369 return 0;
1370}
1371
1372static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) {
1373 int r;
1374
1375 assert(link);
1376 assert(callback);
1377
8bceafa7 1378 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1379 * the function from being called multiple times simultaneously, refuse to reconfigure the
1380 * interface in these cases. */
8bceafa7 1381 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1382 return 0; /* 0 means no-op. */
2c0d7ed3 1383
d09a179e 1384 r = link_call_getlink(link, callback);
572b21d9
YW		 1385 if (r < 0)
1386 return r;
1387
8bceafa7 1388 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1389}
1390
d09a179e
YW		 1391int link_reconfigure(Link *link, bool force) {
1392 return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
1393}
1394
1395int link_reconfigure_after_sleep(Link *link) {
1396 return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler);
1397}
1398
e6bf7774 1399static int link_initialized_and_synced(Link *link) {
505f8da7 1400 Network *network;
505f8da7
TG		 1401 int r;
1402
1403 assert(link);
1404 assert(link->ifname);
1405 assert(link->manager);
1406
bd08ce56 1407 /* We may get called either from the asynchronous netlink callback,
0d411b7f 1408 * or directly from link_check_initialized() if running in a container. */
bd08ce56 1409 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 1410 return 0;
505f8da7 1411
6a7a4e4d 1412 log_link_debug(link, "Link state is up-to-date");
bd08ce56 1413 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1414
0d4ad91d
AR		 1415 r = link_new_bound_by_list(link);
1416 if (r < 0)
1417 return r;
1418
1419 r = link_handle_bound_by_list(link);
1420 if (r < 0)
1421 return r;
1422
c4a03a56 1423 if (!link->network) {
0894cfe4 1424 r = wifi_get_info(link);
8d968fdd
YW		 1425 if (r < 0)
1426 return r;
1427
170e88c8 1428 r = link_get_network(link, &network);
c4a03a56 1429 if (r == -ENOENT) {
29836c16 1430 link_set_state(link, LINK_STATE_UNMANAGED);
4232cf04 1431 return 0;
170e88c8
YW		 1432 }
1433 if (r < 0)
c4a03a56 1434 return r;
505f8da7 1435
c4a03a56
TG		 1436 if (link->flags & IFF_LOOPBACK) {
1437 if (network->link_local != ADDRESS_FAMILY_NO)
1438 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 1439
c4a03a56
TG		 1440 if (network->dhcp != ADDRESS_FAMILY_NO)
1441 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 1442
c4a03a56
TG		 1443 if (network->dhcp_server)
1444 log_link_debug(link, "Ignoring DHCP server for loopback link");
1445 }
bd2efe92 1446
9092113d 1447 link->network = network_ref(network);
bcdcc596 1448 link_update_operstate(link, false);
9092113d 1449 link_dirty(link);
c4a03a56 1450 }
505f8da7 1451
0d4ad91d
AR		 1452 r = link_new_bound_to_list(link);
1453 if (r < 0)
1454 return r;
1455
852a3916 1456 return link_configure(link);
505f8da7
TG		 1457}
1458
302a796f 1459static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1460 int r;
1461
5a1860f7
YW		 1462 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1463 if (r <= 0)
0b54c870 1464 return r;
572b21d9 1465
4ff296b0
YW		 1466 r = link_initialized_and_synced(link);
1467 if (r < 0)
1468 link_enter_failed(link);
5a1860f7
YW		 1469
1470 return 0;
e6bf7774
YW		 1471}
1472
3be9d62a 1473static int link_initialized(Link *link, sd_device *device) {
4f561e8e 1474 assert(link);
4f561e8e
TG		 1475 assert(device);
1476
160203e9
YW		 1477 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1478 * or sysattrs) may be outdated. */
1479 sd_device_ref(device);
1480 sd_device_unref(link->sd_device);
1481 link->sd_device = device;
4f561e8e 1482
160203e9
YW		 1483 /* Do not ignore unamanaged state case here. If an interface is renamed after being once
1484 * configured, and the corresponding .network file has Name= in [Match] section, then the
1485 * interface may be already in unmanaged state. See #20657. */
1486 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED))
679b3605
TG		 1487 return 0;
1488
79008bdd 1489 log_link_debug(link, "udev initialized link");
bd08ce56 1490 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 1491
3c9b8860
TG		 1492 /* udev has initialized the link, but we don't know if we have yet
1493 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1494 * when it returns we know that the pending NEWLINKs have already been
1495 * processed and that we are up-to-date */
4f561e8e 1496
5a1860f7 1497 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1498}
1499
0d411b7f 1500static int link_check_initialized(Link *link) {
51517f9e 1501 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1502 int r;
505f8da7 1503
0d411b7f 1504 assert(link);
505f8da7 1505
0d411b7f 1506 if (path_is_read_only_fs("/sys") > 0)
852a3916 1507 /* no udev */
0d411b7f 1508 return link_initialized_and_synced(link);
852a3916
YW		 1509
1510 /* udev should be around */
0ac655a6 1511 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1512 if (r < 0) {
1513 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1514 return 0;
1515 }
1516
1517 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1518 if (r < 0)
1519 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1520 if (r == 0) {
1521 /* not yet ready */
1522 log_link_debug(link, "link pending udev initialization...");
1523 return 0;
1524 }
1525
1526 r = device_is_renaming(device);
0d411b7f
YW		 1527 if (r < 0)
1528 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1529 if (r > 0) {
1530 log_link_debug(link, "Interface is being renamed, pending initialization.");
1531 return 0;
4f561e8e 1532 }
505f8da7 1533
0d411b7f 1534 return link_initialized(link, device);
a748b692
TG		 1535}
1536
3be9d62a
YW		 1537int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
1538 sd_device_action_t action;
1539 Manager *m = userdata;
1540 Link *link = NULL;
1541 int r, ifindex;
1542
1543 assert(m);
1544 assert(device);
1545
1546 r = sd_device_get_action(device, &action);
1547 if (r < 0) {
1548 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
1549 return 0;
1550 }
1551
1552 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
1553 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
1554 * still exists — and we are interested in that. */
1555 if (action == SD_DEVICE_REMOVE)
1556 return 0;
1557
1558 r = sd_device_get_ifindex(device, &ifindex);
1559 if (r < 0) {
1560 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
1561 device_action_to_string(action));
1562 return 0;
1563 }
1564
1565 r = device_is_renaming(device);
1566 if (r < 0) {
4b9a8c2b 1567 log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
3be9d62a
YW		 1568 device_action_to_string(action));
1569 return 0;
1570 }
1571 if (r > 0) {
1572 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
1573 return 0;
1574 }
1575
6eab614d 1576 r = link_get_by_index(m, ifindex, &link);
3be9d62a 1577 if (r < 0) {
4b9a8c2b 1578 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
3be9d62a
YW		 1579 return 0;
1580 }
1581
4b9a8c2b
YW		 1582 r = link_initialized(link, device);
1583 if (r < 0)
1584 link_enter_failed(link);
3be9d62a
YW		 1585
1586 return 0;
1587}
1588
9c0a72f9
TG		 1589static int link_carrier_gained(Link *link) {
1590 int r;
1591
1592 assert(link);
1593
aa9117c0
YW		 1594 r = link_handle_bound_by_list(link);
1595 if (r < 0)
1596 return r;
1597
600b7898
YW		 1598 if (link->iftype == ARPHRD_CAN)
1599 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1600 return 0;
600b7898 1601
b9ea3d2e 1602 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1603 r = link_acquire_dynamic_conf(link);
f0269653 1604 if (r < 0)
9c0a72f9 1605 return r;
6fc25497 1606
97108953 1607 r = link_request_static_configs(link);
6fc25497
SS		 1608 if (r < 0)
1609 return r;
9c0a72f9
TG		 1610 }
1611
aa9117c0 1612 return 0;
9c0a72f9
TG		 1613}
1614
1615static int link_carrier_lost(Link *link) {
1616 int r;
1617
1618 assert(link);
1619
aa9117c0
YW		 1620 r = link_handle_bound_by_list(link);
1621 if (r < 0)
1622 return r;
93b4dab5 1623
600b7898
YW		 1624 if (link->iftype == ARPHRD_CAN)
1625 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1626 return 0;
1627
f1c22cf4
YW		 1628 if (!link->network)
1629 return 0;
1630
1631 if (link->network->ignore_carrier_loss)
aa9117c0 1632 return 0;
600b7898 1633
2a99eed0 1634 r = link_stop_engines(link, false);
9c0a72f9
TG		 1635 if (r < 0) {
1636 link_enter_failed(link);
1637 return r;
1638 }
1639
3104883d
SS		 1640 r = link_drop_config(link);
1641 if (r < 0)
1642 return r;
1643
5e3bb5da 1644 return link_drop_foreign_config(link);
0c9ee5d5
YW		 1645}
1646
0c9ee5d5
YW		 1647static int link_admin_state_up(Link *link) {
1648 int r;
1649
1650 assert(link);
1651
1652 /* This is called every time an interface admin state changes to up;
1653 * specifically, when IFF_UP flag changes from unset to set. */
1654
1655 if (!link->network)
1656 return 0;
1657
899b0e5e 1658 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
712fd5d2
YW		 1659 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down.");
1660 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1661 }
1662
1663 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1664 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1665 r = link_set_ipv6_mtu(link);
1666 if (r < 0)
1667 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1668
1669 return 0;
1670}
1671
1672static int link_admin_state_down(Link *link) {
1673 assert(link);
1674
1675 if (!link->network)
1676 return 0;
1677
899b0e5e 1678 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
712fd5d2
YW		 1679 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up.");
1680 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1681 }
1682
1683 return 0;
1684}
1685
1686bool link_has_carrier(Link *link) {
1687 /* see Documentation/networking/operstates.txt in the kernel sources */
1688
1689 if (link->kernel_operstate == IF_OPER_UP)
1690 return true;
1691
1692 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1693 /* operstate may not be implemented, so fall back to flags */
1694 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1695 !FLAGS_SET(link->flags, IFF_DORMANT))
1696 return true;
1697
1698 return false;
1699}
1700
1701static bool link_is_enslaved(Link *link) {
1702 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1703 return true;
1704
1f024462 1705 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1706 return true;
1707
0c9ee5d5
YW		 1708 return false;
1709}
1710
1711static LinkAddressState address_state_from_scope(uint8_t scope) {
1712 if (scope < RT_SCOPE_SITE)
1713 /* universally accessible addresses found */
1714 return LINK_ADDRESS_STATE_ROUTABLE;
1715
1716 if (scope < RT_SCOPE_HOST)
1717 /* only link or site local addresses found */
1718 return LINK_ADDRESS_STATE_DEGRADED;
1719
1720 /* no useful addresses found */
1721 return LINK_ADDRESS_STATE_OFF;
1722}
1723
1724void link_update_operstate(Link *link, bool also_update_master) {
1725 LinkOperationalState operstate;
1726 LinkCarrierState carrier_state;
1727 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1728 LinkOnlineState online_state;
1729 _cleanup_strv_free_ char **p = NULL;
1730 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1731 bool changed = false;
1732 Address *address;
1733
1734 assert(link);
1735
1736 if (link->kernel_operstate == IF_OPER_DORMANT)
1737 carrier_state = LINK_CARRIER_STATE_DORMANT;
1738 else if (link_has_carrier(link)) {
1739 if (link_is_enslaved(link))
1740 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1741 else
1742 carrier_state = LINK_CARRIER_STATE_CARRIER;
1743 } else if (link->flags & IFF_UP)
1744 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1745 else
1746 carrier_state = LINK_CARRIER_STATE_OFF;
1747
1748 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1749 Link *slave;
1750
1751 SET_FOREACH(slave, link->slaves) {
1752 link_update_operstate(slave, false);
1753
1754 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1755 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1756 }
1757 }
1758
1759 SET_FOREACH(address, link->addresses) {
1760 if (!address_is_ready(address))
1761 continue;
1762
1763 if (address->family == AF_INET)
1764 ipv4_scope = MIN(ipv4_scope, address->scope);
1765
1766 if (address->family == AF_INET6)
1767 ipv6_scope = MIN(ipv6_scope, address->scope);
1768 }
1769
1770 /* for operstate we also take foreign addresses into account */
1771 SET_FOREACH(address, link->addresses_foreign) {
1772 if (!address_is_ready(address))
1773 continue;
1774
1775 if (address->family == AF_INET)
1776 ipv4_scope = MIN(ipv4_scope, address->scope);
1777
1778 if (address->family == AF_INET6)
1779 ipv6_scope = MIN(ipv6_scope, address->scope);
1780 }
1781
1782 ipv4_address_state = address_state_from_scope(ipv4_scope);
1783 ipv6_address_state = address_state_from_scope(ipv6_scope);
1784 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1785
1786 /* Mapping of address and carrier state vs operational state
1787 * carrier state
1788 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1789 * ------------------------------------------------------------------------------
1790 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1791 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1792 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1793 */
1794
1795 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1796 operstate = (LinkOperationalState) carrier_state;
1797 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1798 operstate = LINK_OPERSTATE_ROUTABLE;
1799 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1800 operstate = LINK_OPERSTATE_DEGRADED;
1801 else
1802 operstate = LINK_OPERSTATE_ENSLAVED;
1803
1804 /* Only determine online state for managed links with RequiredForOnline=yes */
1805 if (!link->network || !link->network->required_for_online)
1806 online_state = _LINK_ONLINE_STATE_INVALID;
1807 else if (operstate < link->network->required_operstate_for_online.min ||
1808 operstate > link->network->required_operstate_for_online.max)
1809 online_state = LINK_ONLINE_STATE_OFFLINE;
1810 else {
1811 AddressFamily required_family = link->network->required_family_for_online;
1812 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1813 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1814
1815 /* The operational state is within the range required for online.
1816 * If a particular address family is also required, we might revert
1817 * to offline in the blocks below. */
1818 online_state = LINK_ONLINE_STATE_ONLINE;
1819
1820 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1821 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1822 online_state = LINK_ONLINE_STATE_OFFLINE;
1823 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1824 online_state = LINK_ONLINE_STATE_OFFLINE;
1825 }
1826
1827 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1828 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1829 online_state = LINK_ONLINE_STATE_OFFLINE;
1830 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1831 online_state = LINK_ONLINE_STATE_OFFLINE;
1832 }
1833 }
1834
1835 if (link->carrier_state != carrier_state) {
1836 link->carrier_state = carrier_state;
1837 changed = true;
1838 if (strv_extend(&p, "CarrierState") < 0)
1839 log_oom();
1840 }
1841
1842 if (link->address_state != address_state) {
1843 link->address_state = address_state;
1844 changed = true;
1845 if (strv_extend(&p, "AddressState") < 0)
1846 log_oom();
1847 }
0d4ad91d 1848
0c9ee5d5
YW		 1849 if (link->ipv4_address_state != ipv4_address_state) {
1850 link->ipv4_address_state = ipv4_address_state;
1851 changed = true;
1852 if (strv_extend(&p, "IPv4AddressState") < 0)
1853 log_oom();
1854 }
9c0a72f9 1855
0c9ee5d5
YW		 1856 if (link->ipv6_address_state != ipv6_address_state) {
1857 link->ipv6_address_state = ipv6_address_state;
1858 changed = true;
1859 if (strv_extend(&p, "IPv6AddressState") < 0)
1860 log_oom();
1861 }
9c0a72f9 1862
0c9ee5d5
YW		 1863 if (link->operstate != operstate) {
1864 link->operstate = operstate;
1865 changed = true;
1866 if (strv_extend(&p, "OperationalState") < 0)
1867 log_oom();
1868 }
9c0a72f9 1869
0c9ee5d5
YW		 1870 if (link->online_state != online_state) {
1871 link->online_state = online_state;
1872 changed = true;
1873 if (strv_extend(&p, "OnlineState") < 0)
1874 log_oom();
1875 }
9c0a72f9 1876
0c9ee5d5
YW		 1877 if (p)
1878 link_send_changed_strv(link, p);
1879 if (changed)
1880 link_dirty(link);
9c0a72f9 1881
0c9ee5d5
YW		 1882 if (also_update_master) {
1883 Link *master;
9c0a72f9 1884
0c9ee5d5
YW		 1885 if (link_get_master(link, &master) >= 0)
1886 link_update_operstate(master, true);
1887 }
9c0a72f9
TG		 1888}
1889
0c9ee5d5
YW		 1890#define FLAG_STRING(string, flag, old, new) \
1891 (((old ^ new) & flag) \
1892 ? ((old & flag) ? (" -" string) : (" +" string)) \
1893 : "")
1894
0d411b7f 1895static int link_update_flags(Link *link, sd_netlink_message *message) {
710fa1b3 1896 bool link_was_lower_up, link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1897 uint8_t operstate;
1898 unsigned flags;
d236718c
DS		 1899 int r;
1900
61135582 1901 assert(link);
0d411b7f 1902 assert(message);
61135582 1903
0d411b7f 1904 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1905 if (r < 0)
0d411b7f 1906 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1907
0d411b7f
YW		 1908 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1909 if (r == -ENODATA)
1910 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1911 operstate = link->kernel_operstate;
0d411b7f
YW		 1912 else if (r < 0)
1913 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1914
0d411b7f 1915 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1916 return 0;
1917
0c9ee5d5
YW		 1918 if (link->flags != flags) {
1919 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1920
0c9ee5d5
YW		 1921 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",
1922 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1923 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1924 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1925 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1926 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1927 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1928 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1929 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1930 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1931 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1932 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1933 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1934 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1935 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1936 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1937 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1938 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1939 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1940 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1941
0c9ee5d5
YW		 1942 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1943 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1944 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1945 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1946 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1947 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1948 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1949 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1950
0c9ee5d5
YW		 1951 if (unknown_flags_added)
1952 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1953
0c9ee5d5
YW		 1954 if (unknown_flags_removed)
1955 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1956 }
61135582 1957
710fa1b3 1958 link_was_lower_up = link->flags & IFF_LOWER_UP;
0d411b7f
YW		 1959 link_was_admin_up = link->flags & IFF_UP;
1960 had_carrier = link_has_carrier(link);
1961
0c9ee5d5
YW		 1962 link->flags = flags;
1963 link->kernel_operstate = operstate;
36161cba 1964
0c9ee5d5 1965 link_update_operstate(link, true);
61135582 1966
710fa1b3
YW		 1967 if (!link_was_lower_up && (link->flags & IFF_LOWER_UP)) {
1968 r = wifi_get_info(link);
1969 if (r < 0)
1970 return r;
1971 if (r > 0) {
1972 /* All link information is up-to-date. So, it is not necessary to call
1973 * RTM_GETLINK netlink method again. */
1974 r = link_reconfigure_impl(link, /* force = */ false);
1975 if (r < 0)
1976 return r;
1977 }
1978 }
1979
0d411b7f
YW		 1980 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1981 log_link_info(link, "Link UP");
22936833 1982
0d411b7f
YW		 1983 r = link_admin_state_up(link);
1984 if (r < 0)
1985 return r;
1986 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1987 log_link_info(link, "Link DOWN");
0d4ad91d 1988
0d411b7f 1989 r = link_admin_state_down(link);
0d4ad91d
AR		 1990 if (r < 0)
1991 return r;
7619683b
TG		 1992 }
1993
0d411b7f
YW		 1994 if (!had_carrier && link_has_carrier(link)) {
1995 log_link_info(link, "Gained carrier");
0d4ad91d 1996
0d411b7f 1997 r = link_carrier_gained(link);
30de2b89
YW		 1998 if (r < 0)
1999 return r;
0d411b7f
YW		 2000 } else if (had_carrier && !link_has_carrier(link)) {
2001 log_link_info(link, "Lost carrier");
2002
2003 r = link_carrier_lost(link);
0b54c870
YW		 2004 if (r < 0)
2005 return r;
b8941f74
TG		 2006 }
2007
0d411b7f
YW		 2008 return 0;
2009}
afe7fd56 2010
0d411b7f
YW		 2011static int link_update_master(Link *link, sd_netlink_message *message) {
2012 int master_ifindex, r;
7465dd22 2013
0d411b7f
YW		 2014 assert(link);
2015 assert(message);
69629de9 2016
0d411b7f
YW		 2017 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
2018 if (r == -ENODATA)
2019 return 0;
2020 if (r < 0)
2021 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2022
571bf1aa
YW		 2023 if (master_ifindex == link->ifindex)
2024 master_ifindex = 0;
2025
0d411b7f
YW		 2026 if (master_ifindex == link->master_ifindex)
2027 return 0;
807667f7 2028
0d411b7f
YW		 2029 if (link->master_ifindex == 0)
2030 log_link_debug(link, "Joined to master interface: %i", master_ifindex);
2031 else if (master_ifindex == 0)
2032 log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex);
2033 else
2034 log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex);
807667f7 2035
0d411b7f 2036 link_drop_from_master(link);
807667f7 2037
0d411b7f 2038 link->master_ifindex = master_ifindex;
413708d1 2039
0d411b7f
YW		 2040 r = link_append_to_master(link);
2041 if (r < 0)
2042 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2043
0d411b7f
YW		 2044 return 0;
2045}
807667f7 2046
0d411b7f 2047static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2048 struct hw_addr_data addr;
0d411b7f 2049 int r;
d93d655c 2050
0d411b7f
YW		 2051 assert(link);
2052 assert(message);
dfc58b47 2053
0d411b7f
YW		 2054 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2055 if (r < 0 && r != -ENODATA)
2056 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2057
e2bacccd 2058 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2059 if (r == -ENODATA)
2060 return 0;
2061 if (r < 0)
fe321d45 2062 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2063
e2bacccd 2064 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2065 return 0;
a61bb41c 2066
e2bacccd
YW		 2067 if (hw_addr_is_null(&link->hw_addr))
2068 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45
YW		 2069 else {
2070 log_link_debug(link, "Hardware address is changed: %s → %s",
e2bacccd 2071 HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr));
0d411b7f 2072
e2bacccd
YW		 2073 if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link)
2074 hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr);
fe321d45
YW		 2075 }
2076
e2bacccd
YW		 2077 link->hw_addr = addr;
2078
fe321d45
YW		 2079 if (!hw_addr_is_null(&link->hw_addr)) {
2080 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2081 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2082 /* bonding master and its slaves have the same hardware address. */
2083 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2084 if (r < 0)
2085 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2086 }
0d411b7f 2087
76a86ffd
YW		 2088 r = ipv4ll_update_mac(link);
2089 if (r < 0)
2090 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2091
0d411b7f 2092 r = ipv4ll_update_mac(link);
a61bb41c 2093 if (r < 0)
0d411b7f 2094 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2095
0d411b7f
YW		 2096 r = dhcp4_update_mac(link);
2097 if (r < 0)
2098 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2099
0d411b7f
YW		 2100 r = dhcp6_update_mac(link);
2101 if (r < 0)
2102 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2103
2104 r = radv_update_mac(link);
2105 if (r < 0)
2106 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2107
2108 if (link->ndisc) {
ca2b7cd8 2109 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2110 if (r < 0)
0d411b7f
YW		 2111 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2112 }
d236718c 2113
35778343
YW		 2114 if (link->lldp_rx) {
2115 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2116 if (r < 0)
c01b9b87
YW		 2117 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2118 }
2119
2120 if (link->lldp_tx) {
2121 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2122 if (r < 0)
2123 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2124 }
2125
0d411b7f
YW		 2126 return 0;
2127}
a61bb41c 2128
0d411b7f 2129static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2130 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2131 int r;
a61bb41c 2132
0d411b7f
YW		 2133 assert(link);
2134 assert(message);
2135
2136 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2137 if (r == -ENODATA)
2138 return 0;
2139 if (r < 0)
2140 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2141 if (mtu == 0)
2142 return 0;
0d411b7f 2143
717ba5fc
YW		 2144 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2145 if (r < 0 && r != -ENODATA)
2146 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2147
2148 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2149 if (r < 0 && r != -ENODATA)
2150 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2151
717ba5fc
YW		 2152 if (max_mtu == 0)
2153 max_mtu = UINT32_MAX;
2154
2155 link->min_mtu = min_mtu;
2156 link->max_mtu = max_mtu;
2157
0d411b7f
YW		 2158 if (link->original_mtu == 0) {
2159 link->original_mtu = mtu;
717ba5fc
YW		 2160 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2161 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2162 }
2163
717ba5fc
YW		 2164 if (link->mtu == mtu)
2165 return 0;
2166
b5d0fd1e
YW		 2167 if (link->mtu != 0)
2168 log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2169 link->mtu, mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2170
2171 link->mtu = mtu;
2172
2173 if (link->dhcp_client) {
2174 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2175 if (r < 0)
0d411b7f
YW		 2176 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2177 }
a61bb41c 2178
0d411b7f
YW		 2179 if (link->radv) {
2180 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2181 if (r < 0)
0d411b7f 2182 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2183 }
2184
2185 return 0;
dd3efc09 2186}
fe8db0c5 2187
0d411b7f
YW		 2188static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2189 _cleanup_strv_free_ char **altnames = NULL;
2190 char **n;
2191 int r;
2192
2193 assert(link);
2194 assert(message);
2195
2196 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2197 if (r < 0 && r != -ENODATA)
2198 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2199
2200 STRV_FOREACH(n, link->alternative_names)
2201 hashmap_remove(link->manager->links_by_name, *n);
2202
2203 strv_free_and_replace(link->alternative_names, altnames);
2204
2205 STRV_FOREACH(n, link->alternative_names) {
2206 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2207 if (r < 0)
2208 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2209 }
2210
2211 return 0;
2212}
2213
2214static int link_update_name(Link *link, sd_netlink_message *message) {
176b8be1 2215 char ifname_from_index[IF_NAMESIZE + 1];
0d411b7f
YW		 2216 const char *ifname;
2217 int r;
2218
2219 assert(link);
2220 assert(message);
2221
2222 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2223 if (r == -ENODATA)
7802194a 2224 /* Hmm?? But ok. */
0d411b7f
YW		 2225 return 0;
2226 if (r < 0)
2227 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2228
2229 if (streq(ifname, link->ifname))
2230 return 0;
2231
176b8be1
YW		 2232 if (!format_ifname(link->ifindex, ifname_from_index))
2233 return log_link_debug_errno(link, SYNTHETIC_ERRNO(ENXIO), "Could not get interface name for index %i.", link->ifindex);
2234
2235 if (!streq(ifname, ifname_from_index)) {
2236 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2237 "with the name currently configured on the actual interface '%s'. Ignoring.",
2238 ifname, ifname_from_index);
2239 return 0;
2240 }
2241
0d411b7f
YW		 2242 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2243
2244 hashmap_remove(link->manager->links_by_name, link->ifname);
2245
2246 r = free_and_strdup(&link->ifname, ifname);
2247 if (r < 0)
2248 return log_oom_debug();
2249
2250 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2251 if (r < 0)
2252 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2253
54d1fdb2
YW		 2254 if (link->dhcp_client) {
2255 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2256 if (r < 0)
2257 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2258 }
2259
2260 if (link->dhcp6_client) {
2261 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2262 if (r < 0)
2263 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2264 }
2265
2266 if (link->ndisc) {
2267 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2268 if (r < 0)
2269 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2270 }
2271
2272 if (link->dhcp_server) {
2273 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2274 if (r < 0)
2275 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2276 }
2277
2278 if (link->radv) {
2279 r = sd_radv_set_ifname(link->radv, link->ifname);
2280 if (r < 0)
2281 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2282 }
2283
35778343
YW		 2284 if (link->lldp_rx) {
2285 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2286 if (r < 0)
c01b9b87
YW		 2287 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2288 }
2289
2290 if (link->lldp_tx) {
2291 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2292 if (r < 0)
2293 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2294 }
2295
2296 if (link->ipv4ll) {
2297 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2298 if (r < 0)
2299 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2300 }
2301
86173383
YW		 2302 r = ipv4acd_set_ifname(link);
2303 if (r < 0)
2304 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2305
0d411b7f
YW		 2306 return 0;
2307}
2308
2309static int link_update(Link *link, sd_netlink_message *message) {
2310 int r;
2311
2312 assert(link);
2313 assert(message);
2314
2315 r = link_update_name(link, message);
2316 if (r < 0)
2317 return r;
2318
2319 r = link_update_alternative_names(link, message);
2320 if (r < 0)
2321 return r;
2322
2323 r = link_update_mtu(link, message);
2324 if (r < 0)
2325 return r;
2326
2327 r = link_update_hardware_address(link, message);
2328 if (r < 0)
2329 return r;
2330
2331 r = link_update_master(link, message);
2332 if (r < 0)
2333 return r;
2334
2335 return link_update_flags(link, message);
2336}
2337
0c9ee5d5
YW		 2338static Link *link_drop_or_unref(Link *link) {
2339 if (!link)
2340 return NULL;
2341 if (!link->manager)
2342 return link_unref(link);
2343 return link_drop(link);
2344}
2345
2346DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2347
2348static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2349 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2350 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2351 unsigned short iftype;
2352 int r, ifindex;
0c9ee5d5
YW		 2353
2354 assert(manager);
2355 assert(message);
2356 assert(ret);
2357
0c9ee5d5
YW		 2358 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2359 if (r < 0)
0d411b7f 2360 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2361 else if (ifindex <= 0)
0d411b7f 2362 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2363
2364 r = sd_rtnl_message_link_get_type(message, &iftype);
2365 if (r < 0)
0d411b7f 2366 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2367
2368 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2369 if (r < 0)
0d411b7f 2370 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2371
2372 /* check for link kind */
2373 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2374 if (r >= 0) {
0d411b7f
YW		 2375 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2376 if (r < 0 && r != -ENODATA)
2377 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2378 r = sd_netlink_message_exit_container(message);
2379 if (r < 0)
0d411b7f 2380 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2381 }
2382
0d411b7f
YW		 2383 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2384 return log_oom_debug();
2385
2386 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2387 return log_oom_debug();
2388
2389 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2390 return log_oom_debug();
2391
0c9ee5d5
YW		 2392 link = new(Link, 1);
2393 if (!link)
2394 return -ENOMEM;
2395
2396 *link = (Link) {
2397 .n_ref = 1,
2398 .state = LINK_STATE_PENDING,
2399 .online_state = _LINK_ONLINE_STATE_INVALID,
2400 .ifindex = ifindex,
2401 .iftype = iftype,
2402 .ifname = TAKE_PTR(ifname),
2403 .kind = TAKE_PTR(kind),
2404
0d411b7f
YW		 2405 .state_file = TAKE_PTR(state_file),
2406 .lease_file = TAKE_PTR(lease_file),
2407 .lldp_file = TAKE_PTR(lldp_file),
2408
0c9ee5d5
YW		 2409 .n_dns = UINT_MAX,
2410 .dns_default_route = -1,
2411 .llmnr = _RESOLVE_SUPPORT_INVALID,
2412 .mdns = _RESOLVE_SUPPORT_INVALID,
2413 .dnssec_mode = _DNSSEC_MODE_INVALID,
2414 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2415 };
2416
6eab614d 2417 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2418 if (r < 0)
0d411b7f 2419 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2420
2421 link->manager = manager;
2422
0d411b7f 2423 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2424 if (r < 0)
0d411b7f 2425 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5
YW		 2426
2427 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2428 if (r < 0)
2429 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2430
2431 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2432 if (r < 0)
2433 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2434
0d411b7f 2435 log_link_debug(link, "Link %d added", link->ifindex);
0c9ee5d5 2436 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2437 return 0;
2438}
2439
0d411b7f 2440int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2441 Link *link = NULL;
2442 NetDev *netdev = NULL;
2443 uint16_t type;
2444 const char *name;
2445 int r, ifindex;
2446
2447 assert(rtnl);
2448 assert(message);
0d411b7f 2449 assert(manager);
3be9d62a
YW		 2450
2451 if (sd_netlink_message_is_error(message)) {
2452 r = sd_netlink_message_get_errno(message);
2453 if (r < 0)
2454 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2455
2456 return 0;
2457 }
2458
2459 r = sd_netlink_message_get_type(message, &type);
2460 if (r < 0) {
2461 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2462 return 0;
2463 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2464 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2465 return 0;
2466 }
2467
2468 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2469 if (r < 0) {
2470 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2471 return 0;
2472 } else if (ifindex <= 0) {
2473 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2474 return 0;
2475 }
2476
2477 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2478 if (r < 0) {
2479 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2480 return 0;
2481 }
2482
6eab614d 2483 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2484 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2485
2486 switch (type) {
2487 case RTM_NEWLINK:
0d411b7f
YW		 2488 if (netdev) {
2489 /* netdev exists, so make sure the ifindex matches */
2490 r = netdev_set_ifindex(netdev, message);
2491 if (r < 0) {
2492 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2493 return 0;
2494 }
2495 }
2496
3be9d62a
YW		 2497 if (!link) {
2498 /* link is new, so add it */
0d411b7f 2499 r = link_new(manager, message, &link);
3be9d62a 2500 if (r < 0) {
0d411b7f 2501 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2502 return 0;
2503 }
3be9d62a 2504
0d411b7f 2505 r = link_update(link, message);
3be9d62a 2506 if (r < 0) {
0d411b7f
YW		 2507 log_warning_errno(r, "Could not process link message: %m");
2508 link_enter_failed(link);
3be9d62a
YW		 2509 return 0;
2510 }
3be9d62a 2511
0d411b7f
YW		 2512 r = link_check_initialized(link);
2513 if (r < 0) {
2514 log_warning_errno(r, "Failed to check link is initialized: %m");
2515 link_enter_failed(link);
2516 return 0;
2517 }
2518 } else {
2519 r = link_update(link, message);
2520 if (r < 0) {
2521 log_warning_errno(r, "Could not process link message: %m");
2522 link_enter_failed(link);
2523 return 0;
2524 }
3be9d62a
YW		 2525 }
2526
2527 break;
2528
2529 case RTM_DELLINK:
2530 link_drop(link);
2531 netdev_drop(netdev);
2532
2533 break;
2534
2535 default:
04499a70 2536 assert_not_reached();
3be9d62a
YW		 2537 }
2538
2539 return 1;
2540}
2541
79c6e114
YW		 2542int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2543 uint16_t message_type;
2544 int r;
2545
2546 assert(m);
2547 assert(link);
2548 assert(error_msg);
2549
2550 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2551 return 0;
2552
2553 r = sd_netlink_message_get_errno(m);
2554 if (r < 0) {
2555 log_link_message_warning_errno(link, m, r, error_msg);
2556 link_enter_failed(link);
2557 return 0;
2558 }
2559
2560 r = sd_netlink_message_get_type(m, &message_type);
2561 if (r < 0) {
2562 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2563 return 0;
2564 }
2565 if (message_type != RTM_NEWLINK) {
2566 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2567 return 0;
2568 }
2569
2570 r = link_update(link, m);
2571 if (r < 0) {
2572 link_enter_failed(link);
2573 return 0;
2574 }
2575
2576 return 1;
2577}
2578
2579int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2580 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2581 int r;
2582
2583 assert(link);
2584 assert(link->manager);
2585 assert(link->manager->rtnl);
2586 assert(callback);
2587
2588 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2589 if (r < 0)
2590 return r;
2591
2592 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2593 link_netlink_destroy_callback, link);
2594 if (r < 0)
2595 return r;
2596
2597 link_ref(link);
2598 return 0;
2599}
2600
fe8db0c5 2601static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2602 [LINK_STATE_PENDING] = "pending",
bd08ce56 2603 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2604 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2605 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2606 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2607 [LINK_STATE_FAILED] = "failed",
370e9930 2608 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2609};
2610
2611DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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