]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network,udev/net: add Kind= settings in [Match] section
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
176b8be1 3#include <net/if.h>
9aa5d8ba 4#include <netinet/in.h>
f579559b 5#include <linux/if.h>
8f815e8b 6#include <linux/if_arp.h>
518cd6b5 7#include <linux/if_link.h>
2a0d07d6 8#include <linux/netdevice.h>
8430841b 9#include <sys/socket.h>
4cc7a82c 10#include <unistd.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
8a77e245 13#include "arphrd-util.h"
c0267a59 14#include "batadv.h"
737f1405
YW		 15#include "bond.h"
16#include "bridge.h"
1346b1f0 17#include "bus-util.h"
3be9d62a
YW		 18#include "device-private.h"
19#include "device-util.h"
27dfc982 20#include "dhcp-identifier.h"
bd91b83e 21#include "dhcp-lease-internal.h"
686d13b9 22#include "env-file.h"
4bb7cc82 23#include "ethtool-util.h"
6706ce2f 24#include "event-util.h"
3ffd4af2 25#include "fd-util.h"
cf1d700d 26#include "fileio.h"
176b8be1 27#include "format-util.h"
af664001 28#include "fs-util.h"
737f1405 29#include "ipvlan.h"
ef118d00 30#include "missing_network.h"
cf1d700d 31#include "netlink-util.h"
c6f7c917 32#include "network-internal.h"
fb486c90 33#include "networkd-address-label.h"
093e3533 34#include "networkd-address.h"
9671ae9d 35#include "networkd-bridge-fdb.h"
ff9e0783 36#include "networkd-bridge-mdb.h"
3ddcbeea 37#include "networkd-can.h"
d5ebcf65 38#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 39#include "networkd-dhcp-server.h"
ca5ad760
YW		 40#include "networkd-dhcp4.h"
41#include "networkd-dhcp6.h"
76a86ffd 42#include "networkd-ipv4acd.h"
ca5ad760 43#include "networkd-ipv4ll.h"
76c5a0f2 44#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 45#include "networkd-link-bus.h"
46#include "networkd-link.h"
8e1ad1ea 47#include "networkd-lldp-tx.h"
23f53b99 48#include "networkd-manager.h"
1e7a0e21 49#include "networkd-ndisc.h"
e4a71bf3 50#include "networkd-neighbor.h"
75156ccb 51#include "networkd-nexthop.h"
19d9a5ad 52#include "networkd-queue.h"
7465dd22 53#include "networkd-radv.h"
3b6a3bde 54#include "networkd-route.h"
bce67bbe 55#include "networkd-routing-policy-rule.h"
0fa8ee6c 56#include "networkd-setlink.h"
19d9a5ad 57#include "networkd-sriov.h"
3b5a4fc6 58#include "networkd-state-file.h"
19d9a5ad 59#include "networkd-sysctl.h"
cf1d700d
TG		 60#include "set.h"
61#include "socket-util.h"
bf331d87 62#include "stat-util.h"
15a5e950 63#include "stdio-util.h"
8b43440b 64#include "string-table.h"
51517f9e 65#include "strv.h"
34658df2 66#include "tc.h"
e4de7287 67#include "tmpfile-util.h"
299ad32d 68#include "udev-util.h"
cf1d700d 69#include "util.h"
737f1405 70#include "vrf.h"
fc2f9534 71
3ca1fab7 72bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 73 assert(link);
74
78c958f8
TG		 75 if (link->flags & IFF_LOOPBACK)
76 return false;
77
78 if (!link->network)
79 return false;
80
500b96eb 81 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 82 return false;
83
a1e35fca
YW		 84 if (link->hw_addr.length != ETH_ALEN)
85 return false;
86
87 if (ether_addr_is_null(&link->hw_addr.ether))
88 return false;
89
71df0776
YW		 90 /* ARPHRD_INFINIBAND seems to potentially support IPv4LL.
91 * But currently sd-ipv4ll and sd-ipv4acd only support ARPHRD_ETHER. */
92 if (link->iftype != ARPHRD_ETHER)
93 return false;
94
95 if (streq_ptr(link->kind, "vrf"))
a8f5bba6
JD		 96 return false;
97
f410d463
YW		 98 /* L3 or L3S mode do not support ARP. */
99 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
100 return false;
101
f2bfcdb9
YW		 102 if (link->network->bond)
103 return false;
104
3ca1fab7 105 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 106}
107
5e0534f1 108bool link_ipv6_enabled(Link *link) {
439689c6
SS		 109 assert(link);
110
111 if (!socket_ipv6_is_supported())
112 return false;
113
b102cdca 114 if (link->network->bond)
2b00a4e0
TY		 115 return false;
116
500b96eb 117 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 118 return false;
119
4cef7fe3 120 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 121 if (link_ipv6ll_enabled(link))
122 return true;
123
124 if (network_has_static_ipv6_configurations(link->network))
125 return true;
126
127 return false;
439689c6
SS		 128}
129
7191a57a
YW		 130bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
131 assert(link);
132
8e4b1b35 133 if (!link->network) {
7191a57a
YW		 134 if (!allow_unmanaged)
135 return false;
136
137 return link_has_carrier(link);
138 }
139
140 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
141 return false;
142
baa95d22
YW		 143 if (!link->network->configure_without_carrier) {
144 if (link->set_flags_messages > 0)
145 return false;
146
147 if (!link_has_carrier(link))
148 return false;
149 }
7191a57a 150
0fa8ee6c
YW		 151 if (link->set_link_messages > 0)
152 return false;
153
112a0972
YW		 154 if (!link->activated)
155 return false;
112a0972 156
7191a57a
YW		 157 return true;
158}
159
15761549
YW		 160void link_ntp_settings_clear(Link *link) {
161 link->ntp = strv_free(link->ntp);
162}
163
164void link_dns_settings_clear(Link *link) {
f5fbe71d 165 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 166 for (unsigned i = 0; i < link->n_dns; i++)
167 in_addr_full_free(link->dns[i]);
15761549 168 link->dns = mfree(link->dns);
f5fbe71d 169 link->n_dns = UINT_MAX;
15761549 170
6e4571f0
YW		 171 link->search_domains = ordered_set_free(link->search_domains);
172 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 173
174 link->dns_default_route = -1;
175 link->llmnr = _RESOLVE_SUPPORT_INVALID;
176 link->mdns = _RESOLVE_SUPPORT_INVALID;
177 link->dnssec_mode = _DNSSEC_MODE_INVALID;
178 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
179
180 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
181}
182
1a6bb31f
YW		 183static void link_free_engines(Link *link) {
184 if (!link)
185 return;
186
187 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
188 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
189 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 190 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 191
35778343 192 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 193 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f
YW		 194
195 ndisc_flush(link);
196
197 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
198 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 199 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 200 link->ndisc = sd_ndisc_unref(link->ndisc);
201 link->radv = sd_radv_unref(link->radv);
202}
203
8301aa0b 204static Link *link_free(Link *link) {
8301aa0b 205 assert(link);
f579559b 206
15761549
YW		 207 link_ntp_settings_clear(link);
208 link_dns_settings_clear(link);
209
8eec0b9d 210 link->routes = set_free(link->routes);
8eec0b9d 211 link->nexthops = set_free(link->nexthops);
8eec0b9d 212 link->neighbors = set_free(link->neighbors);
8eec0b9d 213 link->addresses = set_free(link->addresses);
828a81a9 214 link->traffic_control = set_free(link->traffic_control);
adda1ed9 215
a27588d4 216 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 217
1a6bb31f 218 link_free_engines(link);
49699bac 219
c166a070 220 free(link->ifname);
572b21d9 221 strv_free(link->alternative_names);
ceac4078 222 free(link->kind);
8d968fdd 223 free(link->ssid);
6706ce2f 224 free(link->previous_ssid);
c643bda5 225 free(link->driver);
6cad256d 226
a34e58d4
YW		 227 unlink_and_free(link->lease_file);
228 unlink_and_free(link->lldp_file);
229 unlink_and_free(link->state_file);
c166a070 230
51517f9e 231 sd_device_unref(link->sd_device);
b5db00e5 232
0d4ad91d 233 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 234 hashmap_free(link->bound_by_links);
235
5f707e12 236 set_free_with_destructor(link->slaves, link_unref);
033295c1 237
c9c908a6
YW		 238 network_unref(link->network);
239
6706ce2f
YW		 240 sd_event_source_disable_unref(link->carrier_lost_timer);
241
8301aa0b 242 return mfree(link);
14b746f7
TG		 243}
244
8301aa0b 245DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 246
6eab614d 247int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 248 Link *link;
11a7f229
TG		 249
250 assert(m);
e856ed00 251 assert(ifindex > 0);
11a7f229 252
6eab614d 253 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 254 if (!link)
255 return -ENODEV;
256
0b54c870
YW		 257 if (ret)
258 *ret = link;
259 return 0;
260}
261
262int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
263 Link *link;
264
265 assert(m);
266 assert(ifname);
11a7f229 267
0b54c870
YW		 268 link = hashmap_get(m->links_by_name, ifname);
269 if (!link)
270 return -ENODEV;
271
272 if (ret)
273 *ret = link;
11a7f229
TG		 274 return 0;
275}
276
fe321d45
YW		 277int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
278 Link *link;
279
280 assert(m);
281 assert(hw_addr);
282
283 link = hashmap_get(m->links_by_hw_addr, hw_addr);
284 if (!link)
285 return -ENODEV;
286
287 if (ret)
288 *ret = link;
289 return 0;
290}
291
81357285
YW		 292int link_get_master(Link *link, Link **ret) {
293 assert(link);
294 assert(link->manager);
295 assert(ret);
296
297 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
298 return -ENODEV;
299
6eab614d 300 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 301}
302
af9ba57a 303void link_set_state(Link *link, LinkState state) {
e331e246
TG		 304 assert(link);
305
306 if (link->state == state)
307 return;
308
0beb9542
YW		 309 log_link_debug(link, "State changed: %s -> %s",
310 link_state_to_string(link->state),
311 link_state_to_string(state));
312
e331e246
TG		 313 link->state = state;
314
315 link_send_changed(link, "AdministrativeState", NULL);
9092113d 316 link_dirty(link);
e331e246
TG		 317}
318
2a99eed0 319int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 320 int r = 0, k;
321
322 assert(link);
323 assert(link->manager);
324 assert(link->manager->event);
325
80060352
ZJS		 326 bool keep_dhcp = may_keep_dhcp &&
327 link->network &&
76a86ffd 328 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 329 (link->manager->restarting ||
330 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
331
84add3cd 332 if (!keep_dhcp) {
111bb8f9 333 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 334 if (k < 0)
36c7d709 335 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 336 }
337
2a99eed0
YW		 338 k = sd_dhcp_server_stop(link->dhcp_server);
339 if (k < 0)
340 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
341
35778343 342 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 343 if (k < 0)
c01b9b87
YW		 344 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
345
346 k = sd_lldp_tx_stop(link->lldp_tx);
347 if (k < 0)
348 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 349
84add3cd
YW		 350 k = sd_ipv4ll_stop(link->ipv4ll);
351 if (k < 0)
352 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 353
76a86ffd 354 k = ipv4acd_stop(link);
2488e4d9
YW		 355 if (k < 0)
356 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 357
84add3cd
YW		 358 k = sd_dhcp6_client_stop(link->dhcp6_client);
359 if (k < 0)
360 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 361
a27588d4 362 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 363 if (k < 0)
364 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 365
84add3cd
YW		 366 k = sd_ndisc_stop(link->ndisc);
367 if (k < 0)
368 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 369
259c65f3
YW		 370 ndisc_flush(link);
371
84add3cd
YW		 372 k = sd_radv_stop(link->radv);
373 if (k < 0)
374 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 375
111bb8f9
TG		 376 return r;
377}
378
b22d8a00 379void link_enter_failed(Link *link) {
ef1ba606 380 assert(link);
f882c247 381
370e9930 382 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 383 return;
384
6a7a4e4d 385 log_link_warning(link, "Failed");
449f7554 386
e331e246 387 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 388
2a99eed0 389 (void) link_stop_engines(link, false);
f882c247
TG		 390}
391
6accfd31
DA		 392void link_check_ready(Link *link) {
393 Address *a;
6accfd31
DA		 394
395 assert(link);
396
5f58af25
YW		 397 if (link->state == LINK_STATE_CONFIGURED)
398 return;
399
d19b9939
YW		 400 if (link->state != LINK_STATE_CONFIGURING)
401 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 402
403 if (!link->network)
a7f07cbe 404 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 405
7558f9e7
YW		 406 if (!link->tc_configured)
407 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 408
a7f07cbe
YW		 409 if (link->set_link_messages > 0)
410 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
411
412 if (!link->activated)
413 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
414
7558f9e7
YW		 415 if (link->iftype == ARPHRD_CAN) {
416 /* let's shortcut things for CAN which doesn't need most of checks below. */
417 link_set_state(link, LINK_STATE_CONFIGURED);
418 return;
419 }
420
879377ca
YW		 421 if (!link->stacked_netdevs_created)
422 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
423
76c5a0f2 424 if (!link->static_addresses_configured)
d19b9939 425 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 426
90e74a66 427 SET_FOREACH(a, link->addresses)
39373cb9
YW		 428 if (!address_is_ready(a)) {
429 _cleanup_free_ char *str = NULL;
430
5380707a 431 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
3b6a3bde 432 return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__, strna(str));
39373cb9 433 }
6aa5773b 434
354bc760
YW		 435 if (!link->static_address_labels_configured)
436 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
437
e5b35bf6
YW		 438 if (!link->static_bridge_fdb_configured)
439 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
440
ff9e0783
YW		 441 if (!link->static_bridge_mdb_configured)
442 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
443
fdeba3f5
YW		 444 if (!link->static_ipv6_proxy_ndp_configured)
445 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
446
40ca350e
YW		 447 if (!link->static_neighbors_configured)
448 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
449
d19b9939
YW		 450 if (!link->static_nexthops_configured)
451 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 452
76c5a0f2
YW		 453 if (!link->static_routes_configured)
454 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
455
0e5ef6be 456 if (!link->static_routing_policy_rules_configured)
d19b9939 457 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 458
d19b9939
YW		 459 if (!link->sr_iov_configured)
460 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 461
4bcb8625
YW		 462 /* IPv6LL is assigned after the link gains its carrier. */
463 if (!link->network->configure_without_carrier &&
464 link_ipv6ll_enabled(link) &&
465 !in6_addr_is_set(&link->ipv6ll_address))
466 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
467
3b6a3bde
YW		 468 bool has_dynamic_address = false;
469 SET_FOREACH(a, link->addresses) {
470 if (address_is_marked(a))
471 continue;
472 if (!address_exists(a))
473 continue;
474 if (IN_SET(a->source,
d9098371
YW		 475 NETWORK_CONFIG_SOURCE_IPV4LL,
476 NETWORK_CONFIG_SOURCE_DHCP4,
477 NETWORK_CONFIG_SOURCE_DHCP6,
a27588d4 478 NETWORK_CONFIG_SOURCE_DHCP_PD,
d9098371 479 NETWORK_CONFIG_SOURCE_NDISC)) {
3b6a3bde 480 has_dynamic_address = true;
4bcb8625
YW		 481 break;
482 }
3b6a3bde 483 }
50550722 484
3b6a3bde 485 if ((link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) ||
a27588d4 486 (link_dhcp_pd_is_enabled(link) && link->network->dhcp_pd_assign)) && !has_dynamic_address)
4bcb8625 487 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
a27588d4 488 return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
4bcb8625
YW		 489
490 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
3b6a3bde 491 if (link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) ||
a27588d4 492 link_dhcp6_enabled(link) || link_dhcp_pd_is_enabled(link) ||
3b6a3bde
YW		 493 (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link))) {
494
495 if (!link->ipv4ll_address_configured && !link->dhcp4_configured &&
a27588d4 496 !link->dhcp6_configured && !link->dhcp_pd_configured && !link->ndisc_configured)
4bcb8625
YW		 497 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
498 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
499
a27588d4 500 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
4bcb8625 501 __func__,
4bcb8625 502 yes_no(link->ipv4ll_address_configured),
3b6a3bde
YW		 503 yes_no(link->dhcp4_configured),
504 yes_no(link->dhcp6_configured),
a27588d4 505 yes_no(link->dhcp_pd_configured),
3b6a3bde 506 yes_no(link->ndisc_configured));
463797c1 507 }
6accfd31 508
29836c16 509 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 510}
511
97108953 512static int link_request_static_configs(Link *link) {
f882c247
TG		 513 int r;
514
515 assert(link);
516 assert(link->network);
f5be5601 517 assert(link->state != _LINK_STATE_INVALID);
f882c247 518
354bc760 519 r = link_request_static_addresses(link);
0e5ef6be
YW		 520 if (r < 0)
521 return r;
522
354bc760 523 r = link_request_static_address_labels(link);
f3ef324d
YW		 524 if (r < 0)
525 return r;
e4a71bf3 526
e5b35bf6
YW		 527 r = link_request_static_bridge_fdb(link);
528 if (r < 0)
529 return r;
530
9a038aac
YW		 531 r = link_request_static_bridge_mdb(link);
532 if (r < 0)
533 return r;
534
fdeba3f5
YW		 535 r = link_request_static_ipv6_proxy_ndp_addresses(link);
536 if (r < 0)
537 return r;
538
40ca350e 539 r = link_request_static_neighbors(link);
682c65b0
YW		 540 if (r < 0)
541 return r;
bd6379ec 542
76c5a0f2 543 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 544 if (r < 0)
545 return r;
f882c247 546
76c5a0f2
YW		 547 r = link_request_static_routes(link, false);
548 if (r < 0)
549 return r;
550
551 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 552 if (r < 0)
553 return r;
d4cdbea5 554
f882c247
TG		 555 return 0;
556}
557
1187fc33
YW		 558static int link_request_stacked_netdevs(Link *link) {
559 NetDev *netdev;
e16e4b3b
DS		 560 int r;
561
562 assert(link);
563
1187fc33
YW		 564 link->stacked_netdevs_created = false;
565 link->stacked_netdevs_after_configured_created = false;
e16e4b3b 566
1187fc33 567 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 568 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 569 if (r < 0)
570 return r;
571 }
e16e4b3b 572
bb916f35 573 if (link->create_stacked_netdev_messages == 0) {
1187fc33 574 link->stacked_netdevs_created = true;
bb916f35
YW		 575 link_check_ready(link);
576 }
1187fc33
YW		 577 if (link->create_stacked_netdev_after_configured_messages == 0)
578 link->stacked_netdevs_after_configured_created = true;
e16e4b3b
DS		 579
580 return 0;
581}
582
8566df79 583static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 584 int r;
585
586 assert(link);
587
0f96a823
YW		 588 r = radv_start(link);
589 if (r < 0)
590 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 591
294f129b
YW		 592 r = ndisc_start(link);
593 if (r < 0)
594 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 595
294f129b
YW		 596 r = dhcp6_start(link);
597 if (r < 0)
598 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 599
e7ab854c
TG		 600 return 0;
601}
602
8566df79 603static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 604 int r;
605
606 assert(link);
ff254138
TG		 607 assert(link->manager);
608 assert(link->manager->event);
609
0107b769 610 if (link->dhcp_client) {
294f129b 611 r = dhcp4_start(link);
0107b769 612 if (r < 0)
294f129b 613 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 614
ccffa166 615 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 616
ccffa166 617 } else if (link->ipv4ll) {
5c1d3fc9 618 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 619 if (r < 0)
620 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 621
622 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 623 }
624
ab486ef4
YW		 625 if (link->dhcp_server) {
626 r = sd_dhcp_server_start(link->dhcp_server);
627 if (r < 0)
628 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
629 }
630
76a86ffd
YW		 631 r = ipv4acd_start(link);
632 if (r < 0)
633 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
634
6fc25497
SS		 635 return 0;
636}
637
8566df79 638static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 639 int r;
640
641 assert(link);
0f96a823 642 assert(link->network);
6fc25497 643
8566df79 644 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 645 if (r < 0)
646 return r;
647
94876904 648 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 649 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 650 if (r < 0)
651 return r;
652 }
653
a27588d4 654 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 655 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
656 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
657 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
658 * below will be called in radv_start(). */
a27588d4 659 r = dhcp_request_prefix_delegation(link);
0f96a823 660 if (r < 0)
a27588d4 661 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 662 }
663
c01b9b87
YW		 664 if (link->lldp_tx) {
665 r = sd_lldp_tx_start(link->lldp_tx);
666 if (r < 0)
667 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
668 }
8e1ad1ea 669
35778343
YW		 670 if (link->lldp_rx) {
671 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 672 if (r < 0)
673 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
674 }
675
ff254138
TG		 676 return 0;
677}
678
7657ec3e 679int link_ipv6ll_gained(Link *link) {
0c9ee5d5 680 int r;
deb2e523 681
0c9ee5d5 682 assert(link);
deb2e523 683
0c9ee5d5 684 log_link_info(link, "Gained IPv6LL");
deb2e523 685
7657ec3e
YW		 686 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
687 return 0;
0c9ee5d5 688
7657ec3e
YW		 689 r = link_acquire_dynamic_ipv6_conf(link);
690 if (r < 0)
691 return r;
0c9ee5d5 692
7657ec3e 693 link_check_ready(link);
0c9ee5d5 694 return 0;
deb2e523
TG		 695}
696
112a0972 697int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 698 bool required_up = false;
699 bool link_is_up = false;
852a3916 700 Link *l;
0d4ad91d
AR		 701
702 assert(link);
703
ad82f0c3
YW		 704 /* If at least one interface in bound_to_links has carrier, then make this interface up.
705 * If all interfaces in bound_to_links do not, then make this interface down. */
706
0d4ad91d
AR		 707 if (hashmap_isempty(link->bound_to_links))
708 return 0;
709
710 if (link->flags & IFF_UP)
711 link_is_up = true;
712
852a3916 713 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 714 if (link_has_carrier(l)) {
715 required_up = true;
716 break;
717 }
718
852a3916 719 if (!required_up && link_is_up)
68f52063 720 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 721 if (required_up && !link_is_up)
68f52063 722 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 723
724 return 0;
725}
726
727static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 728 Link *l;
729 int r;
730
731 assert(link);
732
ad82f0c3
YW		 733 /* Update up or down state of interfaces which depend on this interface's carrier state. */
734
0d4ad91d
AR		 735 if (hashmap_isempty(link->bound_by_links))
736 return 0;
737
852a3916 738 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 739 r = link_handle_bound_to_list(l);
740 if (r < 0)
741 return r;
742 }
743
744 return 0;
745}
746
747static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
748 int r;
749
750 assert(link);
751 assert(carrier);
752
753 if (link == carrier)
754 return 0;
755
756 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
757 return 0;
758
190b3b5c 759 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 760 if (r < 0)
761 return r;
762
9092113d
YW		 763 link_dirty(link);
764
0d4ad91d
AR		 765 return 0;
766}
767
768static int link_new_bound_by_list(Link *link) {
769 Manager *m;
770 Link *carrier;
0d4ad91d 771 int r;
0d4ad91d
AR		 772
773 assert(link);
774 assert(link->manager);
775
776 m = link->manager;
777
6eab614d 778 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 779 if (!carrier->network)
780 continue;
781
782 if (strv_isempty(carrier->network->bind_carrier))
783 continue;
784
191a3f16 785 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 786 r = link_put_carrier(link, carrier, &link->bound_by_links);
787 if (r < 0)
788 return r;
0d4ad91d
AR		 789 }
790 }
791
90e74a66 792 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 793 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
794 if (r < 0)
795 return r;
0d4ad91d
AR		 796 }
797
798 return 0;
799}
800
801static int link_new_bound_to_list(Link *link) {
802 Manager *m;
803 Link *carrier;
0d4ad91d 804 int r;
0d4ad91d
AR		 805
806 assert(link);
807 assert(link->manager);
808
809 if (!link->network)
810 return 0;
811
812 if (strv_isempty(link->network->bind_carrier))
813 return 0;
814
815 m = link->manager;
816
6eab614d 817 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 818 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 819 r = link_put_carrier(link, carrier, &link->bound_to_links);
820 if (r < 0)
821 return r;
0d4ad91d
AR		 822 }
823 }
824
852a3916 825 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 826 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
827 if (r < 0)
828 return r;
0d4ad91d
AR		 829 }
830
831 return 0;
832}
833
0d4ad91d 834static void link_free_bound_to_list(Link *link) {
9092113d 835 bool updated = false;
0d4ad91d 836 Link *bound_to;
0d4ad91d 837
9092113d
YW		 838 assert(link);
839
840 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
841 updated = true;
0d4ad91d
AR		 842
843 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 844 link_dirty(bound_to);
0d4ad91d
AR		 845 }
846
9092113d
YW		 847 if (updated)
848 link_dirty(link);
0d4ad91d
AR		 849}
850
851static void link_free_bound_by_list(Link *link) {
9092113d 852 bool updated = false;
0d4ad91d 853 Link *bound_by;
0d4ad91d 854
9092113d
YW		 855 assert(link);
856
857 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
858 updated = true;
0d4ad91d
AR		 859
860 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 861 link_dirty(bound_by);
0d4ad91d
AR		 862 link_handle_bound_to_list(bound_by);
863 }
864 }
865
9092113d
YW		 866 if (updated)
867 link_dirty(link);
0d4ad91d
AR		 868}
869
81357285 870static int link_append_to_master(Link *link) {
5f707e12
YW		 871 Link *master;
872 int r;
873
874 assert(link);
5f707e12 875
81357285
YW		 876 /* - The link may have no master.
877 * - RTM_NEWLINK message about master interface may not be received yet. */
878 if (link_get_master(link, &master) < 0)
879 return 0;
5f707e12 880
de7fef4b 881 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 882 if (r <= 0)
5f707e12
YW		 883 return r;
884
885 link_ref(link);
886 return 0;
887}
888
81357285 889static void link_drop_from_master(Link *link) {
5f707e12
YW		 890 Link *master;
891
892 assert(link);
893
81357285 894 if (!link->manager)
5f707e12
YW		 895 return;
896
81357285 897 if (link_get_master(link, &master) < 0)
5f707e12
YW		 898 return;
899
900 link_unref(set_remove(master->slaves, link));
901}
902
56001f02
YW		 903static void link_drop_requests(Link *link) {
904 Request *req;
905
906 assert(link);
907 assert(link->manager);
908
909 ORDERED_SET_FOREACH(req, link->manager->request_queue)
910 if (req->link == link)
911 request_drop(req);
912}
913
cc2d7efc 914static Link *link_drop(Link *link) {
0b54c870
YW		 915 char **n;
916
63130eb3 917 if (!link)
cc2d7efc 918 return NULL;
0d4ad91d 919
63130eb3
YW		 920 assert(link->manager);
921
0d4ad91d
AR		 922 link_set_state(link, LINK_STATE_LINGER);
923
63130eb3
YW		 924 /* Drop all references from other links and manager. Note that async netlink calls may have
925 * references to the link, and they will be dropped when we receive replies. */
926
56001f02
YW		 927 link_drop_requests(link);
928
bb193d2d
YW		 929 link_free_bound_to_list(link);
930 link_free_bound_by_list(link);
0d4ad91d 931
81357285 932 link_drop_from_master(link);
5f707e12 933
4c78dc17
YW		 934 if (link->state_file)
935 (void) unlink(link->state_file);
936
63130eb3
YW		 937 link_clean(link);
938
0b54c870
YW		 939 STRV_FOREACH(n, link->alternative_names)
940 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 941 hashmap_remove(link->manager->links_by_name, link->ifname);
942
fe321d45 943 /* bonding master and its slaves have the same hardware address. */
e74f1d07 944 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 945
63130eb3 946 /* The following must be called at last. */
6eab614d 947 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 948 return link_unref(link);
0d4ad91d
AR		 949}
950
5e5b137a 951static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 952 int k, r;
953
954 assert(link);
955 assert(link->manager);
5e5b137a 956
5e3bb5da
YW		 957 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
958 * to remove loopback address or addresses used for root NFS. */
959
960 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
961 return 0;
962 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
963 return 0;
964 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
965 return 0;
966
e36d601c 967 r = link_drop_foreign_routes(link);
5e5b137a 968
e36d601c 969 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 970 if (k < 0 && r >= 0)
971 r = k;
972
e36d601c 973 k = link_drop_foreign_addresses(link);
0b81225e
YW		 974 if (k < 0 && r >= 0)
975 r = k;
d1bdafd2 976
e36d601c 977 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 978 if (k < 0 && r >= 0)
979 r = k;
980
0b81225e
YW		 981 k = manager_drop_foreign_routing_policy_rules(link->manager);
982 if (k < 0 && r >= 0)
983 r = k;
984
985 return r;
5e5b137a
TG		 986}
987
a0e99a37 988static int link_drop_managed_config(Link *link) {
0b81225e
YW		 989 int k, r;
990
991 assert(link);
992 assert(link->manager);
3104883d 993
a0e99a37 994 r = link_drop_managed_routes(link);
3104883d 995
a0e99a37 996 k = link_drop_managed_nexthops(link);
0b81225e
YW		 997 if (k < 0 && r >= 0)
998 r = k;
d1bdafd2 999
a0e99a37 1000 k = link_drop_managed_addresses(link);
0b81225e
YW		 1001 if (k < 0 && r >= 0)
1002 r = k;
1003
a0e99a37 1004 k = link_drop_managed_neighbors(link);
25b82b6e
YW		 1005 if (k < 0 && r >= 0)
1006 r = k;
1007
a0e99a37 1008 k = link_drop_managed_routing_policy_rules(link);
0b81225e
YW		 1009 if (k < 0 && r >= 0)
1010 r = k;
3104883d 1011
0b81225e 1012 return r;
3104883d
SS		 1013}
1014
b4564f4e
YW		 1015static void link_foreignize_config(Link *link) {
1016 assert(link);
1017 assert(link->manager);
1018
1019 link_foreignize_routes(link);
1020 link_foreignize_nexthops(link);
1021 link_foreignize_addresses(link);
1022 link_foreignize_neighbors(link);
1023 link_foreignize_routing_policy_rules(link);
1024}
1025
c3b94251 1026static int link_configure(Link *link) {
4ecdcb07
YW		 1027 int r;
1028
ef1ba606 1029 assert(link);
b22d8a00 1030 assert(link->network);
bd08ce56 1031 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1032
1187fc33
YW		 1033 link_set_state(link, LINK_STATE_CONFIGURING);
1034
3cf58ef3
YW		 1035 r = link_new_bound_to_list(link);
1036 if (r < 0)
1037 return r;
1038
1dec9d81 1039 r = link_request_traffic_control(link);
4ecdcb07
YW		 1040 if (r < 0)
1041 return r;
1042
7558f9e7
YW		 1043 if (link->iftype == ARPHRD_CAN) {
1044 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1045 r = link_request_to_set_can(link);
1046 if (r < 0)
1047 return r;
1048
1049 return link_request_to_activate(link);
1050 }
1051
518cd6b5
SS		 1052 r = link_configure_sr_iov(link);
1053 if (r < 0)
1054 return r;
1055
5e0534f1 1056 r = link_set_sysctl(link);
b69c3180
SS		 1057 if (r < 0)
1058 return r;
8749cbcd 1059
d05c332c 1060 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1061 if (r < 0)
1062 return r;
1063
72e65e6f
YW		 1064 r = link_request_to_set_ipoib(link);
1065 if (r < 0)
1066 return r;
1067
1187fc33 1068 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1069 if (r < 0)
1070 return r;
1071
1187fc33 1072 r = link_request_to_set_group(link);
99d2baa2
SS		 1073 if (r < 0)
1074 return r;
1075
1187fc33
YW		 1076 r = link_configure_mtu(link);
1077 if (r < 0)
1078 return r;
1079
1080 r = link_request_to_set_addrgen_mode(link);
1081 if (r < 0)
1082 return r;
1083
1084 r = link_request_to_set_master(link);
1085 if (r < 0)
1086 return r;
1087
1088 r = link_request_stacked_netdevs(link);
1089 if (r < 0)
1090 return r;
1091
1092 r = link_request_to_set_bond(link);
1093 if (r < 0)
1094 return r;
1095
1096 r = link_request_to_set_bridge(link);
1097 if (r < 0)
1098 return r;
1099
1100 r = link_request_to_set_bridge_vlan(link);
1101 if (r < 0)
1102 return r;
1103
1104 r = link_request_to_activate(link);
89fe6535
SS		 1105 if (r < 0)
1106 return r;
1107
2ffd6d73
YW		 1108 r = ipv4ll_configure(link);
1109 if (r < 0)
1110 return r;
64b21ece 1111
ccffa166 1112 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1113 if (r < 0)
1114 return r;
eb34d4af 1115
ccffa166 1116 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1117 if (r < 0)
1118 return r;
f5a8c43f 1119
ba4c7184 1120 r = link_request_ndisc(link);
2ffd6d73
YW		 1121 if (r < 0)
1122 return r;
4138fb2c 1123
1d28a3cf
YW		 1124 r = link_request_dhcp_server(link);
1125 if (r < 0)
1126 return r;
1127
a254fab2 1128 r = link_request_radv(link);
086b8853
YW		 1129 if (r < 0)
1130 return r;
7465dd22 1131
2ffd6d73
YW		 1132 r = link_lldp_rx_configure(link);
1133 if (r < 0)
1134 return r;
ce43e484 1135
c01b9b87
YW		 1136 r = link_lldp_tx_configure(link);
1137 if (r < 0)
1138 return r;
1139
5e3bb5da
YW		 1140 r = link_drop_foreign_config(link);
1141 if (r < 0)
1142 return r;
4c649652 1143
1187fc33
YW		 1144 r = link_request_static_configs(link);
1145 if (r < 0)
1146 return r;
1147
1148 if (!link_has_carrier(link))
1149 return 0;
1150
1151 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1152}
1153
170e88c8
YW		 1154static int link_get_network(Link *link, Network **ret) {
1155 Network *network;
1a3caa49 1156 int r;
170e88c8
YW		 1157
1158 assert(link);
1159 assert(link->manager);
1160 assert(ret);
1161
1162 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1163 bool warn = false;
1164
1a3caa49 1165 r = net_match_config(
170e88c8
YW		 1166 &network->match,
1167 link->sd_device,
52135071
YW		 1168 &link->hw_addr,
1169 &link->permanent_hw_addr,
170e88c8
YW		 1170 link->driver,
1171 link->iftype,
65022cd7 1172 link->kind,
170e88c8
YW		 1173 link->ifname,
1174 link->alternative_names,
1175 link->wlan_iftype,
1176 link->ssid,
1a3caa49
YW		 1177 &link->bssid);
1178 if (r < 0)
1179 return r;
1180 if (r == 0)
170e88c8
YW		 1181 continue;
1182
1183 if (network->match.ifname && link->sd_device) {
1184 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1185 const char *attr;
1186
1187 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1188 (void) safe_atou8(attr, &name_assign_type);
1189
1190 warn = name_assign_type == NET_NAME_ENUM;
1191 }
1192
1193 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1194 "found matching network '%s'%s.",
1195 network->filename,
1196 warn ? ", based on potentially unpredictable interface name" : "");
1197
1198 if (network->unmanaged)
1199 return -ENOENT;
1200
1201 *ret = network;
1202 return 0;
1203 }
1204
1205 return -ENOENT;
1206}
1207
7f80fa12 1208static int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1209 Network *network = NULL;
ad932b15
YW		 1210 int r;
1211
5a1860f7 1212 assert(link);
572b21d9 1213
fb961119
YW		 1214 if (!IN_SET(link->state, LINK_STATE_INITIALIZED, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
1215 return 0;
1216
170e88c8 1217 r = link_get_network(link, &network);
cb71e9c6 1218 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1219 return r;
1220
fb961119
YW		 1221 if (link->state != LINK_STATE_UNMANAGED && !network)
1222 /* If link is in initialized state, then link->network is also NULL. */
1223 force = true;
1224
99b8517c 1225 if (link->network == network && !force)
ad932b15
YW		 1226 return 0;
1227
fb961119
YW		 1228 if (network) {
1229 if (link->state == LINK_STATE_INITIALIZED)
1230 log_link_info(link, "Configuring with %s.", network->filename);
1231 else
1232 log_link_info(link, "Reconfiguring with %s.", network->filename);
1233 } else
1234 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1235 "Unmanaging interface.");
ad932b15
YW		 1236
1237 /* Dropping old .network file */
2a99eed0 1238 r = link_stop_engines(link, false);
572b21d9 1239 if (r < 0)
ad932b15 1240 return r;
ad932b15 1241
19d9a5ad
YW		 1242 link_drop_requests(link);
1243
81db4f3d 1244 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1245 /* When a new/updated .network file is assigned, first make all configs (addresses,
1246 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1247 * link_drop_foreign_config() in link_configure().
1248 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1249 * here we need to drop the configs such as addresses, routes, and so on configured by
1250 * the previously assigned .network file. */
b4564f4e
YW		 1251 link_foreignize_config(link);
1252 else {
a0e99a37
YW		 1253 /* Remove all managed configs. Note, foreign configs are removed in later by
1254 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1255 r = link_drop_managed_config(link);
b4564f4e
YW		 1256 if (r < 0)
1257 return r;
1258 }
ad932b15 1259
3cf58ef3
YW		 1260 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1261 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1262 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1263 * map here, as it depends on .network files assigned to other links. */
1264 link_free_bound_to_list(link);
1265
ad932b15
YW		 1266 link_free_engines(link);
1267 link->network = network_unref(link->network);
1268
cb71e9c6
YW		 1269 if (!network) {
1270 link_set_state(link, LINK_STATE_UNMANAGED);
1271 return 0;
1272 }
1273
ad932b15 1274 /* Then, apply new .network file */
9092113d 1275 link->network = network_ref(network);
b156a95d 1276 link_update_operstate(link, true);
9092113d 1277 link_dirty(link);
ad932b15 1278
ad932b15 1279 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1280 link->activated = false;
ad932b15 1281
ad932b15
YW		 1282 r = link_configure(link);
1283 if (r < 0)
1284 return r;
1285
0e397560 1286 return 1;
ad932b15
YW		 1287}
1288
96f5f9ef 1289static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1290 int r;
1291
d09a179e
YW		 1292 assert(link);
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
7f80fa12 1298 r = link_reconfigure_impl(link, force);
d09a179e 1299 if (r < 0) {
572b21d9 1300 link_enter_failed(link);
d09a179e
YW		 1301 return 0;
1302 }
572b21d9 1303
d09a179e 1304 return r;
572b21d9
YW		 1305}
1306
5a1860f7 1307static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1308 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1309}
572b21d9 1310
5a1860f7 1311static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1312 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1313}
1314
d09a179e 1315static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9
YW		 1316 int r;
1317
d09a179e
YW		 1318 assert(link);
1319
96f5f9ef 1320 r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
d09a179e
YW		 1321 if (r != 0)
1322 return r;
1323
1324 /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */
1325 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
1326 return 0;
1327
1328 /* re-request static configs, and restart engines. */
1329 r = link_stop_engines(link, false);
1330 if (r < 0) {
1331 link_enter_failed(link);
1332 return 0;
1333 }
1334
1335 r = link_acquire_dynamic_conf(link);
1336 if (r < 0) {
1337 link_enter_failed(link);
1338 return 0;
1339 }
1340
1341 r = link_request_static_configs(link);
1342 if (r < 0) {
1343 link_enter_failed(link);
1344 return 0;
1345 }
1346
1347 return 0;
1348}
1349
1350static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) {
1351 int r;
1352
1353 assert(link);
1354 assert(callback);
1355
8bceafa7 1356 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1357 * the function from being called multiple times simultaneously, refuse to reconfigure the
1358 * interface in these cases. */
8bceafa7 1359 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1360 return 0; /* 0 means no-op. */
2c0d7ed3 1361
d09a179e 1362 r = link_call_getlink(link, callback);
572b21d9
YW		 1363 if (r < 0)
1364 return r;
1365
8bceafa7 1366 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1367}
1368
d09a179e
YW		 1369int link_reconfigure(Link *link, bool force) {
1370 return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
1371}
1372
1373int link_reconfigure_after_sleep(Link *link) {
1374 return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler);
1375}
1376
e6bf7774 1377static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1378 int r;
1379
1380 assert(link);
505f8da7
TG		 1381 assert(link->manager);
1382
faa2e64f
YW		 1383 if (link->manager->test_mode) {
1384 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1385 link_set_state(link, LINK_STATE_UNMANAGED);
1386 return 0;
1387 }
1388
fb961119 1389 /* This may get called either from the asynchronous netlink callback,
0d411b7f 1390 * or directly from link_check_initialized() if running in a container. */
bd08ce56 1391 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 1392 return 0;
505f8da7 1393
6a7a4e4d 1394 log_link_debug(link, "Link state is up-to-date");
bd08ce56 1395 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1396
0d4ad91d
AR		 1397 r = link_new_bound_by_list(link);
1398 if (r < 0)
1399 return r;
1400
1401 r = link_handle_bound_by_list(link);
1402 if (r < 0)
1403 return r;
1404
fb961119 1405 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1406}
1407
302a796f 1408static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1409 int r;
1410
5a1860f7
YW		 1411 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1412 if (r <= 0)
0b54c870 1413 return r;
572b21d9 1414
4ff296b0
YW		 1415 r = link_initialized_and_synced(link);
1416 if (r < 0)
1417 link_enter_failed(link);
5a1860f7
YW		 1418
1419 return 0;
e6bf7774
YW		 1420}
1421
3be9d62a 1422static int link_initialized(Link *link, sd_device *device) {
4f561e8e 1423 assert(link);
4f561e8e
TG		 1424 assert(device);
1425
160203e9
YW		 1426 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1427 * or sysattrs) may be outdated. */
1428 sd_device_ref(device);
1429 sd_device_unref(link->sd_device);
1430 link->sd_device = device;
4f561e8e 1431
160203e9
YW		 1432 /* Do not ignore unamanaged state case here. If an interface is renamed after being once
1433 * configured, and the corresponding .network file has Name= in [Match] section, then the
1434 * interface may be already in unmanaged state. See #20657. */
1435 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED))
679b3605
TG		 1436 return 0;
1437
79008bdd 1438 log_link_debug(link, "udev initialized link");
bd08ce56 1439 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 1440
3c9b8860
TG		 1441 /* udev has initialized the link, but we don't know if we have yet
1442 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1443 * when it returns we know that the pending NEWLINKs have already been
1444 * processed and that we are up-to-date */
4f561e8e 1445
5a1860f7 1446 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1447}
1448
0d411b7f 1449static int link_check_initialized(Link *link) {
51517f9e 1450 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1451 int r;
505f8da7 1452
0d411b7f 1453 assert(link);
505f8da7 1454
0d411b7f 1455 if (path_is_read_only_fs("/sys") > 0)
852a3916 1456 /* no udev */
0d411b7f 1457 return link_initialized_and_synced(link);
852a3916
YW		 1458
1459 /* udev should be around */
0ac655a6 1460 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1461 if (r < 0) {
1462 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1463 return 0;
1464 }
1465
1466 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1467 if (r < 0)
1468 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1469 if (r == 0) {
1470 /* not yet ready */
1471 log_link_debug(link, "link pending udev initialization...");
1472 return 0;
1473 }
1474
1475 r = device_is_renaming(device);
0d411b7f
YW		 1476 if (r < 0)
1477 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1478 if (r > 0) {
1479 log_link_debug(link, "Interface is being renamed, pending initialization.");
1480 return 0;
4f561e8e 1481 }
505f8da7 1482
0d411b7f 1483 return link_initialized(link, device);
a748b692
TG		 1484}
1485
3be9d62a
YW		 1486int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
1487 sd_device_action_t action;
1488 Manager *m = userdata;
1489 Link *link = NULL;
1490 int r, ifindex;
1491
1492 assert(m);
1493 assert(device);
1494
1495 r = sd_device_get_action(device, &action);
1496 if (r < 0) {
1497 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
1498 return 0;
1499 }
1500
1501 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
1502 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
1503 * still exists — and we are interested in that. */
1504 if (action == SD_DEVICE_REMOVE)
1505 return 0;
1506
1507 r = sd_device_get_ifindex(device, &ifindex);
1508 if (r < 0) {
1509 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
1510 device_action_to_string(action));
1511 return 0;
1512 }
1513
1514 r = device_is_renaming(device);
1515 if (r < 0) {
4b9a8c2b 1516 log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
3be9d62a
YW		 1517 device_action_to_string(action));
1518 return 0;
1519 }
1520 if (r > 0) {
1521 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
1522 return 0;
1523 }
1524
6eab614d 1525 r = link_get_by_index(m, ifindex, &link);
3be9d62a 1526 if (r < 0) {
4b9a8c2b 1527 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
3be9d62a
YW		 1528 return 0;
1529 }
1530
4b9a8c2b
YW		 1531 r = link_initialized(link, device);
1532 if (r < 0)
1533 link_enter_failed(link);
3be9d62a
YW		 1534
1535 return 0;
1536}
1537
9c0a72f9 1538static int link_carrier_gained(Link *link) {
6706ce2f 1539 bool force_reconfigure;
9c0a72f9
TG		 1540 int r;
1541
1542 assert(link);
1543
6706ce2f
YW		 1544 r = event_source_disable(link->carrier_lost_timer);
1545 if (r < 0)
1546 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1547
d9910948
YW		 1548 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1549 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1550 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1551 * restarted, and the correct network information will be gained.
1552 *
1553 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1554 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1555 * already assigned to the interface (in that case, the .network file does not have the SSID=
1556 * setting in the [Match] section), and the interface is already being configured. Of course,
1557 * there may exist another .network file with higher priority and a matching SSID= setting. But
1558 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1559 *
6706ce2f 1560 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1561 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1562 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1563 link->previous_ssid = mfree(link->previous_ssid);
1564
a72d2a7b 1565 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_FAILED, LINK_STATE_LINGER)) {
b7ac1284
YW		 1566 /* At this stage, both wlan and link information should be up-to-date. Hence,
1567 * it is not necessary to call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or
1568 * NL80211_CMD_GET_STATION commands, and simply call link_reconfigure_impl().
1569 * Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
6706ce2f 1570 r = link_reconfigure_impl(link, force_reconfigure);
b7ac1284
YW		 1571 if (r != 0)
1572 return r;
1573 }
1574
aa9117c0
YW		 1575 r = link_handle_bound_by_list(link);
1576 if (r < 0)
1577 return r;
1578
600b7898
YW		 1579 if (link->iftype == ARPHRD_CAN)
1580 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1581 return 0;
600b7898 1582
b9ea3d2e 1583 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1584 r = link_acquire_dynamic_conf(link);
f0269653 1585 if (r < 0)
9c0a72f9 1586 return r;
6fc25497 1587
97108953 1588 r = link_request_static_configs(link);
6fc25497
SS		 1589 if (r < 0)
1590 return r;
9c0a72f9
TG		 1591 }
1592
aa9117c0 1593 return 0;
9c0a72f9
TG		 1594}
1595
6706ce2f
YW		 1596static int link_carrier_lost_impl(Link *link) {
1597 int r, ret = 0;
1598
1599 assert(link);
1600
1601 link->previous_ssid = mfree(link->previous_ssid);
1602
1603 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1604 return 0;
1605
1606 if (!link->network)
1607 return 0;
1608
1609 r = link_stop_engines(link, false);
1610 if (r < 0)
1611 ret = r;
1612
a0e99a37 1613 r = link_drop_managed_config(link);
6706ce2f
YW		 1614 if (r < 0 && ret >= 0)
1615 ret = r;
1616
1617 return ret;
1618}
1619
1620static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
1621 Link *link = userdata;
1622 int r;
1623
1624 assert(link);
1625
1626 r = link_carrier_lost_impl(link);
1627 if (r < 0) {
1628 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1629 link_enter_failed(link);
1630 }
1631
1632 return 0;
1633}
1634
9c0a72f9
TG		 1635static int link_carrier_lost(Link *link) {
1636 int r;
1637
1638 assert(link);
1639
aa9117c0
YW		 1640 r = link_handle_bound_by_list(link);
1641 if (r < 0)
1642 return r;
93b4dab5 1643
600b7898
YW		 1644 if (link->iftype == ARPHRD_CAN)
1645 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1646 return 0;
1647
f1c22cf4
YW		 1648 if (!link->network)
1649 return 0;
1650
6706ce2f 1651 if (link->network->ignore_carrier_loss_usec == USEC_INFINITY)
aa9117c0 1652 return 0;
600b7898 1653
6706ce2f
YW		 1654 if (link->network->ignore_carrier_loss_usec == 0)
1655 return link_carrier_lost_impl(link);
1656
1657 return event_reset_time_relative(link->manager->event,
1658 &link->carrier_lost_timer,
1659 clock_boottime_or_monotonic(),
1660 link->network->ignore_carrier_loss_usec,
1661 0,
1662 link_carrier_lost_handler,
1663 link,
1664 0,
1665 "link-carrier-loss",
1666 true);
0c9ee5d5
YW		 1667}
1668
0c9ee5d5
YW		 1669static int link_admin_state_up(Link *link) {
1670 int r;
1671
1672 assert(link);
1673
1674 /* This is called every time an interface admin state changes to up;
1675 * specifically, when IFF_UP flag changes from unset to set. */
1676
1677 if (!link->network)
1678 return 0;
1679
899b0e5e 1680 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1681 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1682 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1683 }
1684
1685 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1686 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1687 r = link_set_ipv6_mtu(link);
1688 if (r < 0)
1689 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1690
1691 return 0;
1692}
1693
1694static int link_admin_state_down(Link *link) {
1695 assert(link);
1696
1697 if (!link->network)
1698 return 0;
1699
899b0e5e 1700 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1701 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1702 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1703 }
1704
1705 return 0;
1706}
1707
0c9ee5d5
YW		 1708static bool link_is_enslaved(Link *link) {
1709 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1710 return true;
1711
1f024462 1712 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1713 return true;
1714
0c9ee5d5
YW		 1715 return false;
1716}
1717
1718static LinkAddressState address_state_from_scope(uint8_t scope) {
1719 if (scope < RT_SCOPE_SITE)
1720 /* universally accessible addresses found */
1721 return LINK_ADDRESS_STATE_ROUTABLE;
1722
1723 if (scope < RT_SCOPE_HOST)
1724 /* only link or site local addresses found */
1725 return LINK_ADDRESS_STATE_DEGRADED;
1726
1727 /* no useful addresses found */
1728 return LINK_ADDRESS_STATE_OFF;
1729}
1730
1731void link_update_operstate(Link *link, bool also_update_master) {
1732 LinkOperationalState operstate;
1733 LinkCarrierState carrier_state;
1734 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1735 LinkOnlineState online_state;
1736 _cleanup_strv_free_ char **p = NULL;
1737 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1738 bool changed = false;
1739 Address *address;
1740
1741 assert(link);
1742
1743 if (link->kernel_operstate == IF_OPER_DORMANT)
1744 carrier_state = LINK_CARRIER_STATE_DORMANT;
1745 else if (link_has_carrier(link)) {
1746 if (link_is_enslaved(link))
1747 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1748 else
1749 carrier_state = LINK_CARRIER_STATE_CARRIER;
1750 } else if (link->flags & IFF_UP)
1751 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1752 else
1753 carrier_state = LINK_CARRIER_STATE_OFF;
1754
1755 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1756 Link *slave;
1757
1758 SET_FOREACH(slave, link->slaves) {
1759 link_update_operstate(slave, false);
1760
1761 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1762 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1763 }
1764 }
1765
1766 SET_FOREACH(address, link->addresses) {
1767 if (!address_is_ready(address))
1768 continue;
1769
1770 if (address->family == AF_INET)
1771 ipv4_scope = MIN(ipv4_scope, address->scope);
1772
1773 if (address->family == AF_INET6)
1774 ipv6_scope = MIN(ipv6_scope, address->scope);
1775 }
1776
0c9ee5d5
YW		 1777 ipv4_address_state = address_state_from_scope(ipv4_scope);
1778 ipv6_address_state = address_state_from_scope(ipv6_scope);
1779 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1780
1781 /* Mapping of address and carrier state vs operational state
1782 * carrier state
1783 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1784 * ------------------------------------------------------------------------------
1785 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1786 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1787 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1788 */
1789
1790 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1791 operstate = (LinkOperationalState) carrier_state;
1792 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1793 operstate = LINK_OPERSTATE_ROUTABLE;
1794 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1795 operstate = LINK_OPERSTATE_DEGRADED;
1796 else
1797 operstate = LINK_OPERSTATE_ENSLAVED;
1798
1799 /* Only determine online state for managed links with RequiredForOnline=yes */
1800 if (!link->network || !link->network->required_for_online)
1801 online_state = _LINK_ONLINE_STATE_INVALID;
1802 else if (operstate < link->network->required_operstate_for_online.min ||
1803 operstate > link->network->required_operstate_for_online.max)
1804 online_state = LINK_ONLINE_STATE_OFFLINE;
1805 else {
1806 AddressFamily required_family = link->network->required_family_for_online;
1807 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1808 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1809
1810 /* The operational state is within the range required for online.
1811 * If a particular address family is also required, we might revert
1812 * to offline in the blocks below. */
1813 online_state = LINK_ONLINE_STATE_ONLINE;
1814
1815 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1816 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1817 online_state = LINK_ONLINE_STATE_OFFLINE;
1818 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1819 online_state = LINK_ONLINE_STATE_OFFLINE;
1820 }
1821
1822 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1823 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1824 online_state = LINK_ONLINE_STATE_OFFLINE;
1825 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1826 online_state = LINK_ONLINE_STATE_OFFLINE;
1827 }
1828 }
1829
1830 if (link->carrier_state != carrier_state) {
1831 link->carrier_state = carrier_state;
1832 changed = true;
1833 if (strv_extend(&p, "CarrierState") < 0)
1834 log_oom();
1835 }
1836
1837 if (link->address_state != address_state) {
1838 link->address_state = address_state;
1839 changed = true;
1840 if (strv_extend(&p, "AddressState") < 0)
1841 log_oom();
1842 }
0d4ad91d 1843
0c9ee5d5
YW		 1844 if (link->ipv4_address_state != ipv4_address_state) {
1845 link->ipv4_address_state = ipv4_address_state;
1846 changed = true;
1847 if (strv_extend(&p, "IPv4AddressState") < 0)
1848 log_oom();
1849 }
9c0a72f9 1850
0c9ee5d5
YW		 1851 if (link->ipv6_address_state != ipv6_address_state) {
1852 link->ipv6_address_state = ipv6_address_state;
1853 changed = true;
1854 if (strv_extend(&p, "IPv6AddressState") < 0)
1855 log_oom();
1856 }
9c0a72f9 1857
0c9ee5d5
YW		 1858 if (link->operstate != operstate) {
1859 link->operstate = operstate;
1860 changed = true;
1861 if (strv_extend(&p, "OperationalState") < 0)
1862 log_oom();
1863 }
9c0a72f9 1864
0c9ee5d5
YW		 1865 if (link->online_state != online_state) {
1866 link->online_state = online_state;
1867 changed = true;
1868 if (strv_extend(&p, "OnlineState") < 0)
1869 log_oom();
1870 }
9c0a72f9 1871
0c9ee5d5
YW		 1872 if (p)
1873 link_send_changed_strv(link, p);
1874 if (changed)
1875 link_dirty(link);
9c0a72f9 1876
0c9ee5d5
YW		 1877 if (also_update_master) {
1878 Link *master;
9c0a72f9 1879
0c9ee5d5
YW		 1880 if (link_get_master(link, &master) >= 0)
1881 link_update_operstate(master, true);
1882 }
9c0a72f9
TG		 1883}
1884
0c9ee5d5
YW		 1885#define FLAG_STRING(string, flag, old, new) \
1886 (((old ^ new) & flag) \
1887 ? ((old & flag) ? (" -" string) : (" +" string)) \
1888 : "")
1889
0d411b7f 1890static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1891 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1892 uint8_t operstate;
1893 unsigned flags;
d236718c
DS		 1894 int r;
1895
61135582 1896 assert(link);
0d411b7f 1897 assert(message);
61135582 1898
0d411b7f 1899 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1900 if (r < 0)
0d411b7f 1901 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1902
0d411b7f
YW		 1903 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1904 if (r == -ENODATA)
1905 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1906 operstate = link->kernel_operstate;
0d411b7f
YW		 1907 else if (r < 0)
1908 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1909
0d411b7f 1910 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1911 return 0;
1912
0c9ee5d5
YW		 1913 if (link->flags != flags) {
1914 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1915
0c9ee5d5
YW		 1916 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",
1917 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1918 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1919 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1920 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1921 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1922 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1923 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1924 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1925 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1926 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1927 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1928 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1929 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1930 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1931 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1932 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1933 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1934 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1935 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1936
0c9ee5d5
YW		 1937 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1938 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1939 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1940 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1941 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1942 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1943 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1944 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1945
0c9ee5d5
YW		 1946 if (unknown_flags_added)
1947 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1948
0c9ee5d5
YW		 1949 if (unknown_flags_removed)
1950 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1951 }
61135582 1952
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
0d411b7f
YW		 1961 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1962 log_link_info(link, "Link UP");
22936833 1963
0d411b7f
YW		 1964 r = link_admin_state_up(link);
1965 if (r < 0)
1966 return r;
1967 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1968 log_link_info(link, "Link DOWN");
0d4ad91d 1969
0d411b7f 1970 r = link_admin_state_down(link);
0d4ad91d
AR		 1971 if (r < 0)
1972 return r;
7619683b
TG		 1973 }
1974
0d411b7f
YW		 1975 if (!had_carrier && link_has_carrier(link)) {
1976 log_link_info(link, "Gained carrier");
0d4ad91d 1977
0d411b7f 1978 r = link_carrier_gained(link);
30de2b89
YW		 1979 if (r < 0)
1980 return r;
0d411b7f
YW		 1981 } else if (had_carrier && !link_has_carrier(link)) {
1982 log_link_info(link, "Lost carrier");
1983
1984 r = link_carrier_lost(link);
0b54c870
YW		 1985 if (r < 0)
1986 return r;
b8941f74
TG		 1987 }
1988
0d411b7f
YW		 1989 return 0;
1990}
afe7fd56 1991
0d411b7f
YW		 1992static int link_update_master(Link *link, sd_netlink_message *message) {
1993 int master_ifindex, r;
7465dd22 1994
0d411b7f
YW		 1995 assert(link);
1996 assert(message);
69629de9 1997
0d411b7f
YW		 1998 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1999 if (r == -ENODATA)
2000 return 0;
2001 if (r < 0)
2002 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 2003
571bf1aa
YW		 2004 if (master_ifindex == link->ifindex)
2005 master_ifindex = 0;
2006
0d411b7f
YW		 2007 if (master_ifindex == link->master_ifindex)
2008 return 0;
807667f7 2009
0d411b7f
YW		 2010 if (link->master_ifindex == 0)
2011 log_link_debug(link, "Joined to master interface: %i", master_ifindex);
2012 else if (master_ifindex == 0)
2013 log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex);
2014 else
2015 log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex);
807667f7 2016
0d411b7f 2017 link_drop_from_master(link);
807667f7 2018
0d411b7f 2019 link->master_ifindex = master_ifindex;
413708d1 2020
0d411b7f
YW		 2021 r = link_append_to_master(link);
2022 if (r < 0)
2023 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2024
0d411b7f
YW		 2025 return 0;
2026}
807667f7 2027
0d411b7f 2028static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2029 struct hw_addr_data addr;
0d411b7f 2030 int r;
d93d655c 2031
0d411b7f
YW		 2032 assert(link);
2033 assert(message);
dfc58b47 2034
0d411b7f
YW		 2035 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2036 if (r < 0 && r != -ENODATA)
2037 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2038
e2bacccd 2039 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2040 if (r == -ENODATA)
2041 return 0;
2042 if (r < 0)
fe321d45 2043 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2044
e2bacccd 2045 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2046 return 0;
a61bb41c 2047
de0f1579 2048 if (link->hw_addr.length == 0)
e2bacccd 2049 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45
YW		 2050 else {
2051 log_link_debug(link, "Hardware address is changed: %s → %s",
e2bacccd 2052 HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr));
0d411b7f 2053
e74f1d07 2054 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2055 }
2056
e2bacccd
YW		 2057 link->hw_addr = addr;
2058
fe321d45
YW		 2059 if (!hw_addr_is_null(&link->hw_addr)) {
2060 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2061 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2062 /* bonding master and its slaves have the same hardware address. */
2063 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2064 if (r < 0)
2065 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2066 }
0d411b7f 2067
76a86ffd
YW		 2068 r = ipv4ll_update_mac(link);
2069 if (r < 0)
2070 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2071
0d411b7f 2072 r = ipv4ll_update_mac(link);
a61bb41c 2073 if (r < 0)
0d411b7f 2074 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2075
0d411b7f
YW		 2076 r = dhcp4_update_mac(link);
2077 if (r < 0)
2078 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2079
0d411b7f
YW		 2080 r = dhcp6_update_mac(link);
2081 if (r < 0)
2082 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2083
2084 r = radv_update_mac(link);
2085 if (r < 0)
2086 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2087
2088 if (link->ndisc) {
ca2b7cd8 2089 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2090 if (r < 0)
0d411b7f
YW		 2091 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2092 }
d236718c 2093
35778343
YW		 2094 if (link->lldp_rx) {
2095 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2096 if (r < 0)
c01b9b87
YW		 2097 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2098 }
2099
2100 if (link->lldp_tx) {
2101 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2102 if (r < 0)
2103 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2104 }
2105
0d411b7f
YW		 2106 return 0;
2107}
a61bb41c 2108
0d411b7f 2109static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2110 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2111 int r;
a61bb41c 2112
0d411b7f
YW		 2113 assert(link);
2114 assert(message);
2115
2116 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2117 if (r == -ENODATA)
2118 return 0;
2119 if (r < 0)
2120 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2121 if (mtu == 0)
2122 return 0;
0d411b7f 2123
717ba5fc
YW		 2124 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2125 if (r < 0 && r != -ENODATA)
2126 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2127
2128 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2129 if (r < 0 && r != -ENODATA)
2130 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2131
717ba5fc
YW		 2132 if (max_mtu == 0)
2133 max_mtu = UINT32_MAX;
2134
2135 link->min_mtu = min_mtu;
2136 link->max_mtu = max_mtu;
2137
0d411b7f
YW		 2138 if (link->original_mtu == 0) {
2139 link->original_mtu = mtu;
717ba5fc
YW		 2140 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2141 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2142 }
2143
717ba5fc
YW		 2144 if (link->mtu == mtu)
2145 return 0;
2146
b5d0fd1e
YW		 2147 if (link->mtu != 0)
2148 log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2149 link->mtu, mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2150
2151 link->mtu = mtu;
2152
2153 if (link->dhcp_client) {
2154 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2155 if (r < 0)
0d411b7f
YW		 2156 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2157 }
a61bb41c 2158
0d411b7f
YW		 2159 if (link->radv) {
2160 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2161 if (r < 0)
0d411b7f 2162 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2163 }
2164
2165 return 0;
dd3efc09 2166}
fe8db0c5 2167
0d411b7f
YW		 2168static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2169 _cleanup_strv_free_ char **altnames = NULL;
2170 char **n;
2171 int r;
2172
2173 assert(link);
2174 assert(message);
2175
2176 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7
YW		 2177 if (r == -ENODATA)
2178 /* The message does not have IFLA_PROP_LIST container attribute. It does not means the
2179 * interface has no alternative name. */
2180 return 0;
2181 if (r < 0)
0d411b7f
YW		 2182 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2183
1b345c1e
YW		 2184 if (strv_equal(altnames, link->alternative_names))
2185 return 0;
2186
0d411b7f
YW		 2187 STRV_FOREACH(n, link->alternative_names)
2188 hashmap_remove(link->manager->links_by_name, *n);
2189
2190 strv_free_and_replace(link->alternative_names, altnames);
2191
2192 STRV_FOREACH(n, link->alternative_names) {
2193 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2194 if (r < 0)
2195 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2196 }
2197
2198 return 0;
2199}
2200
2201static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2202 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2203 const char *ifname;
2204 int r;
2205
2206 assert(link);
2207 assert(message);
2208
2209 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2210 if (r == -ENODATA)
7802194a 2211 /* Hmm?? But ok. */
0d411b7f
YW		 2212 return 0;
2213 if (r < 0)
2214 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2215
2216 if (streq(ifname, link->ifname))
2217 return 0;
2218
01afd0f7
YW		 2219 r = format_ifname(link->ifindex, ifname_from_index);
2220 if (r < 0)
2221 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2222
2223 if (!streq(ifname, ifname_from_index)) {
2224 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2225 "with the name currently configured on the actual interface '%s'. Ignoring.",
2226 ifname, ifname_from_index);
2227 return 0;
2228 }
2229
0d411b7f
YW		 2230 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2231
2232 hashmap_remove(link->manager->links_by_name, link->ifname);
2233
2234 r = free_and_strdup(&link->ifname, ifname);
2235 if (r < 0)
2236 return log_oom_debug();
2237
2238 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2239 if (r < 0)
2240 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2241
54d1fdb2
YW		 2242 if (link->dhcp_client) {
2243 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2244 if (r < 0)
2245 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2246 }
2247
2248 if (link->dhcp6_client) {
2249 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2250 if (r < 0)
2251 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2252 }
2253
2254 if (link->ndisc) {
2255 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2256 if (r < 0)
2257 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2258 }
2259
2260 if (link->dhcp_server) {
2261 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2262 if (r < 0)
2263 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2264 }
2265
2266 if (link->radv) {
2267 r = sd_radv_set_ifname(link->radv, link->ifname);
2268 if (r < 0)
2269 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2270 }
2271
35778343
YW		 2272 if (link->lldp_rx) {
2273 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2274 if (r < 0)
c01b9b87
YW		 2275 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2276 }
2277
2278 if (link->lldp_tx) {
2279 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2280 if (r < 0)
2281 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2282 }
2283
2284 if (link->ipv4ll) {
2285 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2286 if (r < 0)
2287 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2288 }
2289
86173383
YW		 2290 r = ipv4acd_set_ifname(link);
2291 if (r < 0)
2292 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2293
0d411b7f
YW		 2294 return 0;
2295}
2296
2297static int link_update(Link *link, sd_netlink_message *message) {
2298 int r;
2299
2300 assert(link);
2301 assert(message);
2302
2303 r = link_update_name(link, message);
2304 if (r < 0)
2305 return r;
2306
2307 r = link_update_alternative_names(link, message);
2308 if (r < 0)
2309 return r;
2310
2311 r = link_update_mtu(link, message);
2312 if (r < 0)
2313 return r;
2314
2315 r = link_update_hardware_address(link, message);
2316 if (r < 0)
2317 return r;
2318
2319 r = link_update_master(link, message);
2320 if (r < 0)
2321 return r;
2322
7d0d832d
YW		 2323 r = link_update_ipv6ll_addrgen_mode(link, message);
2324 if (r < 0)
2325 return r;
2326
0d411b7f
YW		 2327 return link_update_flags(link, message);
2328}
2329
0c9ee5d5
YW		 2330static Link *link_drop_or_unref(Link *link) {
2331 if (!link)
2332 return NULL;
2333 if (!link->manager)
2334 return link_unref(link);
2335 return link_drop(link);
2336}
2337
2338DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2339
2340static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2341 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2342 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2343 unsigned short iftype;
2344 int r, ifindex;
0c9ee5d5
YW		 2345
2346 assert(manager);
2347 assert(message);
2348 assert(ret);
2349
0c9ee5d5
YW		 2350 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2351 if (r < 0)
0d411b7f 2352 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2353 else if (ifindex <= 0)
0d411b7f 2354 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2355
2356 r = sd_rtnl_message_link_get_type(message, &iftype);
2357 if (r < 0)
0d411b7f 2358 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2359
2360 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2361 if (r < 0)
0d411b7f 2362 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2363
2364 /* check for link kind */
2365 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2366 if (r >= 0) {
0d411b7f
YW		 2367 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2368 if (r < 0 && r != -ENODATA)
2369 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2370 r = sd_netlink_message_exit_container(message);
2371 if (r < 0)
0d411b7f 2372 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2373 }
2374
4c78dc17
YW		 2375 if (!manager->test_mode) {
2376 /* Do not update state files when running in test mode. */
2377 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2378 return log_oom_debug();
0d411b7f 2379
4c78dc17
YW		 2380 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2381 return log_oom_debug();
0d411b7f 2382
4c78dc17
YW		 2383 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2384 return log_oom_debug();
2385 }
0d411b7f 2386
0c9ee5d5
YW		 2387 link = new(Link, 1);
2388 if (!link)
2389 return -ENOMEM;
2390
2391 *link = (Link) {
2392 .n_ref = 1,
2393 .state = LINK_STATE_PENDING,
2394 .online_state = _LINK_ONLINE_STATE_INVALID,
2395 .ifindex = ifindex,
2396 .iftype = iftype,
2397 .ifname = TAKE_PTR(ifname),
2398 .kind = TAKE_PTR(kind),
2399
7d0d832d
YW		 2400 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2401
0d411b7f
YW		 2402 .state_file = TAKE_PTR(state_file),
2403 .lease_file = TAKE_PTR(lease_file),
2404 .lldp_file = TAKE_PTR(lldp_file),
2405
0c9ee5d5
YW		 2406 .n_dns = UINT_MAX,
2407 .dns_default_route = -1,
2408 .llmnr = _RESOLVE_SUPPORT_INVALID,
2409 .mdns = _RESOLVE_SUPPORT_INVALID,
2410 .dnssec_mode = _DNSSEC_MODE_INVALID,
2411 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2412 };
2413
6eab614d 2414 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2415 if (r < 0)
0d411b7f 2416 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2417
2418 link->manager = manager;
2419
0d411b7f 2420 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2421 if (r < 0)
0d411b7f 2422 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2423
8a77e245
YW		 2424 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2425 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2426
4fea97a6
YW		 2427 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2428 if (r < 0) {
2429 if (r != -ENODATA)
2430 log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute, ignoring: %m");
2431
2432 if (netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL) >= 0) {
2433 /* Fallback to ethtool, if the link has a hardware address. */
2434 r = ethtool_get_permanent_hw_addr(&manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2435 if (r < 0)
2436 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2437 }
2438 }
8a77e245
YW		 2439 if (link->permanent_hw_addr.length > 0)
2440 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
0c9ee5d5
YW		 2441
2442 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2443 if (r < 0)
2444 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
df25b9e4
YW		 2445 else
2446 log_link_debug(link, "Found driver: %s", strna(link->driver));
0c9ee5d5 2447
b1d9c504
YW		 2448 if (streq_ptr(link->driver, "dsa")) {
2449 uint32_t dsa_master_ifindex;
2450
2451 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2452 if (r < 0) {
2453 dsa_master_ifindex = 0;
2454 if (r != -ENODATA)
2455 log_link_warning_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface, ignoring: %m");
2456 } else if (dsa_master_ifindex > INT_MAX) {
2457 dsa_master_ifindex = 0;
2458 log_link_warning(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2459 dsa_master_ifindex);
2460 }
2461
2462 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2463 }
2464
0c9ee5d5 2465 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2466 return 0;
2467}
2468
0d411b7f 2469int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2470 Link *link = NULL;
2471 NetDev *netdev = NULL;
2472 uint16_t type;
2473 const char *name;
2474 int r, ifindex;
2475
2476 assert(rtnl);
2477 assert(message);
0d411b7f 2478 assert(manager);
3be9d62a
YW		 2479
2480 if (sd_netlink_message_is_error(message)) {
2481 r = sd_netlink_message_get_errno(message);
2482 if (r < 0)
2483 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2484
2485 return 0;
2486 }
2487
2488 r = sd_netlink_message_get_type(message, &type);
2489 if (r < 0) {
2490 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2491 return 0;
2492 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2493 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2494 return 0;
2495 }
2496
2497 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2498 if (r < 0) {
2499 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2500 return 0;
2501 } else if (ifindex <= 0) {
2502 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2503 return 0;
2504 }
2505
2506 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2507 if (r < 0) {
2508 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2509 return 0;
2510 }
2511
6eab614d 2512 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2513 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2514
2515 switch (type) {
2516 case RTM_NEWLINK:
0d411b7f
YW		 2517 if (netdev) {
2518 /* netdev exists, so make sure the ifindex matches */
2519 r = netdev_set_ifindex(netdev, message);
2520 if (r < 0) {
66141164 2521 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2522 return 0;
2523 }
2524 }
2525
3be9d62a
YW		 2526 if (!link) {
2527 /* link is new, so add it */
0d411b7f 2528 r = link_new(manager, message, &link);
3be9d62a 2529 if (r < 0) {
0d411b7f 2530 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2531 return 0;
2532 }
3be9d62a 2533
0d411b7f 2534 r = link_update(link, message);
3be9d62a 2535 if (r < 0) {
66141164 2536 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2537 link_enter_failed(link);
3be9d62a
YW		 2538 return 0;
2539 }
3be9d62a 2540
0d411b7f
YW		 2541 r = link_check_initialized(link);
2542 if (r < 0) {
66141164 2543 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2544 link_enter_failed(link);
2545 return 0;
2546 }
2547 } else {
2548 r = link_update(link, message);
2549 if (r < 0) {
66141164 2550 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2551 link_enter_failed(link);
2552 return 0;
2553 }
3be9d62a 2554 }
3be9d62a
YW		 2555 break;
2556
2557 case RTM_DELLINK:
2558 link_drop(link);
2559 netdev_drop(netdev);
3be9d62a
YW		 2560 break;
2561
2562 default:
04499a70 2563 assert_not_reached();
3be9d62a
YW		 2564 }
2565
2566 return 1;
2567}
2568
79c6e114
YW		 2569int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2570 uint16_t message_type;
2571 int r;
2572
2573 assert(m);
2574 assert(link);
2575 assert(error_msg);
2576
2577 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2578 return 0;
2579
2580 r = sd_netlink_message_get_errno(m);
2581 if (r < 0) {
2582 log_link_message_warning_errno(link, m, r, error_msg);
2583 link_enter_failed(link);
2584 return 0;
2585 }
2586
2587 r = sd_netlink_message_get_type(m, &message_type);
2588 if (r < 0) {
2589 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2590 return 0;
2591 }
2592 if (message_type != RTM_NEWLINK) {
2593 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2594 return 0;
2595 }
2596
2597 r = link_update(link, m);
2598 if (r < 0) {
2599 link_enter_failed(link);
2600 return 0;
2601 }
2602
2603 return 1;
2604}
2605
2606int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2607 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2608 int r;
2609
2610 assert(link);
2611 assert(link->manager);
2612 assert(link->manager->rtnl);
2613 assert(callback);
2614
2615 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2616 if (r < 0)
2617 return r;
2618
2619 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2620 link_netlink_destroy_callback, link);
2621 if (r < 0)
2622 return r;
2623
2624 link_ref(link);
2625 return 0;
2626}
2627
fe8db0c5 2628static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2629 [LINK_STATE_PENDING] = "pending",
bd08ce56 2630 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2631 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2632 [LINK_STATE_CONFIGURED] = "configured",
2633 [LINK_STATE_UNMANAGED] = "unmanaged",
2634 [LINK_STATE_FAILED] = "failed",
2635 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2636};
2637
2638DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2639
2640int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2641 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2642 static const char* map[] = {
2643 [LOG2U(IFF_UP)] = "up", /* interface is up. */
2644 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid.*/
2645 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2646 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2647 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2648 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2649 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2650 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2651 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2652 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2653 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2654 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
2655 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast.*/
2656 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2657 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2658 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2659 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2660 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2661 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2662 };
2663
2664 assert(ret);
2665
2666 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2667 if (FLAGS_SET(flags, 1 << i) && map[i])
2668 if (!strextend_with_separator(&str, ",", map[i]))
2669 return -ENOMEM;
7ae55b78
YW		 2670
2671 *ret = TAKE_PTR(str);
2672 return 0;
2673}
2674
2675static const char * const kernel_operstate_table[] = {
2676 [IF_OPER_UNKNOWN] = "unknown",
2677 [IF_OPER_NOTPRESENT] = "not-present",
2678 [IF_OPER_DOWN] = "down",
2679 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2680 [IF_OPER_TESTING] = "testing",
2681 [IF_OPER_DORMANT] = "dormant",
2682 [IF_OPER_UP] = "up",
2683};
2684
2685DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
Unnamed repository; edit this file 'description' to name the repository.