]> 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
modules-load: use RET_GATHER, update error handling
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
176b8be1 3#include <net/if.h>
9aa5d8ba 4#include <netinet/in.h>
f579559b 5#include <linux/if.h>
8f815e8b 6#include <linux/if_arp.h>
518cd6b5 7#include <linux/if_link.h>
2a0d07d6 8#include <linux/netdevice.h>
8430841b 9#include <sys/socket.h>
4cc7a82c 10#include <unistd.h>
f579559b 11
b5efdb8a 12#include "alloc-util.h"
8a77e245 13#include "arphrd-util.h"
c0267a59 14#include "batadv.h"
737f1405
YW		 15#include "bond.h"
16#include "bridge.h"
1346b1f0 17#include "bus-util.h"
3be9d62a
YW		 18#include "device-private.h"
19#include "device-util.h"
27dfc982 20#include "dhcp-identifier.h"
bd91b83e 21#include "dhcp-lease-internal.h"
686d13b9 22#include "env-file.h"
4bb7cc82 23#include "ethtool-util.h"
6706ce2f 24#include "event-util.h"
3ffd4af2 25#include "fd-util.h"
cf1d700d 26#include "fileio.h"
176b8be1 27#include "format-util.h"
af664001 28#include "fs-util.h"
e2341b6b 29#include "glyph-util.h"
3ae6b3bf 30#include "logarithm.h"
ef118d00 31#include "missing_network.h"
cf1d700d 32#include "netlink-util.h"
c6f7c917 33#include "network-internal.h"
fb486c90 34#include "networkd-address-label.h"
093e3533 35#include "networkd-address.h"
9671ae9d 36#include "networkd-bridge-fdb.h"
ff9e0783 37#include "networkd-bridge-mdb.h"
3ddcbeea 38#include "networkd-can.h"
d5ebcf65 39#include "networkd-dhcp-prefix-delegation.h"
8fcf1d61 40#include "networkd-dhcp-server.h"
ca5ad760
YW		 41#include "networkd-dhcp4.h"
42#include "networkd-dhcp6.h"
76a86ffd 43#include "networkd-ipv4acd.h"
ca5ad760 44#include "networkd-ipv4ll.h"
76c5a0f2 45#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 46#include "networkd-link-bus.h"
47#include "networkd-link.h"
8e1ad1ea 48#include "networkd-lldp-tx.h"
23f53b99 49#include "networkd-manager.h"
1e7a0e21 50#include "networkd-ndisc.h"
e4a71bf3 51#include "networkd-neighbor.h"
75156ccb 52#include "networkd-nexthop.h"
19d9a5ad 53#include "networkd-queue.h"
7465dd22 54#include "networkd-radv.h"
3b6a3bde 55#include "networkd-route.h"
bce67bbe 56#include "networkd-routing-policy-rule.h"
0fa8ee6c 57#include "networkd-setlink.h"
19d9a5ad 58#include "networkd-sriov.h"
3b5a4fc6 59#include "networkd-state-file.h"
19d9a5ad 60#include "networkd-sysctl.h"
986b2514 61#include "networkd-wifi.h"
cf1d700d
TG		 62#include "set.h"
63#include "socket-util.h"
15a5e950 64#include "stdio-util.h"
8b43440b 65#include "string-table.h"
51517f9e 66#include "strv.h"
34658df2 67#include "tc.h"
e4de7287 68#include "tmpfile-util.h"
af7a86b8 69#include "tuntap.h"
299ad32d 70#include "udev-util.h"
737f1405 71#include "vrf.h"
fc2f9534 72
5e0534f1 73bool link_ipv6_enabled(Link *link) {
439689c6
SS		 74 assert(link);
75
76 if (!socket_ipv6_is_supported())
77 return false;
78
5fb5fae9 79 if (link->iftype == ARPHRD_CAN)
2b00a4e0
TY		 80 return false;
81
5fb5fae9
YW		 82 if (!link->network)
83 return false;
84
85 if (link->network->bond)
af9ba57a
YW		 86 return false;
87
bd7e0a3f 88 if (link_may_have_ipv6ll(link, /* check_multicast = */ false))
adfeee49
YW		 89 return true;
90
91 if (network_has_static_ipv6_configurations(link->network))
92 return true;
93
94 return false;
439689c6
SS		 95}
96
e33232d4 97static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) {
7191a57a
YW		 98 assert(link);
99
d8d4db58
YW		 100 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED))
101 return false;
102
2fd3908b
YW		 103 if (!link->network)
104 return allow_unmanaged;
7191a57a 105
baa95d22
YW		 106 if (!link->network->configure_without_carrier) {
107 if (link->set_flags_messages > 0)
108 return false;
109
110 if (!link_has_carrier(link))
111 return false;
112 }
7191a57a 113
0fa8ee6c
YW		 114 if (link->set_link_messages > 0)
115 return false;
116
112a0972
YW		 117 if (!link->activated)
118 return false;
112a0972 119
7191a57a
YW		 120 return true;
121}
122
e33232d4
YW		 123bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
124 return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one);
125}
126
15761549
YW		 127void link_ntp_settings_clear(Link *link) {
128 link->ntp = strv_free(link->ntp);
129}
130
131void link_dns_settings_clear(Link *link) {
f5fbe71d 132 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 133 for (unsigned i = 0; i < link->n_dns; i++)
134 in_addr_full_free(link->dns[i]);
15761549 135 link->dns = mfree(link->dns);
f5fbe71d 136 link->n_dns = UINT_MAX;
15761549 137
6e4571f0
YW		 138 link->search_domains = ordered_set_free(link->search_domains);
139 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 140
141 link->dns_default_route = -1;
142 link->llmnr = _RESOLVE_SUPPORT_INVALID;
143 link->mdns = _RESOLVE_SUPPORT_INVALID;
144 link->dnssec_mode = _DNSSEC_MODE_INVALID;
145 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
146
147 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
148}
149
1a6bb31f
YW		 150static void link_free_engines(Link *link) {
151 if (!link)
152 return;
153
154 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
b3fac19f 155
1a6bb31f
YW		 156 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
157 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
e49bad01 158 link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name);
1a6bb31f 159
35778343 160 link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx);
c01b9b87 161 link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx);
1a6bb31f 162
1a6bb31f 163 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
b3fac19f 164
1a6bb31f 165 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 166 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
b3fac19f 167
1a6bb31f 168 link->ndisc = sd_ndisc_unref(link->ndisc);
b3fac19f
YW		 169 link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire);
170 ndisc_flush(link);
171
1a6bb31f
YW		 172 link->radv = sd_radv_unref(link->radv);
173}
174
8301aa0b 175static Link *link_free(Link *link) {
8301aa0b 176 assert(link);
f579559b 177
15761549
YW		 178 link_ntp_settings_clear(link);
179 link_dns_settings_clear(link);
180
8eec0b9d 181 link->routes = set_free(link->routes);
8eec0b9d 182 link->nexthops = set_free(link->nexthops);
8eec0b9d 183 link->neighbors = set_free(link->neighbors);
8eec0b9d 184 link->addresses = set_free(link->addresses);
3a67b8bb
YW		 185 link->qdiscs = set_free(link->qdiscs);
186 link->tclasses = set_free(link->tclasses);
adda1ed9 187
a27588d4 188 link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes);
4b409e85 189
1a6bb31f 190 link_free_engines(link);
49699bac 191
b0ff6dea 192 set_free(link->sr_iov_virt_port_ifindices);
c166a070 193 free(link->ifname);
572b21d9 194 strv_free(link->alternative_names);
ceac4078 195 free(link->kind);
8d968fdd 196 free(link->ssid);
6706ce2f 197 free(link->previous_ssid);
c643bda5 198 free(link->driver);
6cad256d 199
a34e58d4
YW		 200 unlink_and_free(link->lease_file);
201 unlink_and_free(link->lldp_file);
202 unlink_and_free(link->state_file);
c166a070 203
8de56fb3 204 sd_device_unref(link->dev);
9aa2585e 205 netdev_unref(link->netdev);
b5db00e5 206
0d4ad91d 207 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 208 hashmap_free(link->bound_by_links);
209
5f707e12 210 set_free_with_destructor(link->slaves, link_unref);
033295c1 211
c9c908a6
YW		 212 network_unref(link->network);
213
6706ce2f
YW		 214 sd_event_source_disable_unref(link->carrier_lost_timer);
215
8301aa0b 216 return mfree(link);
14b746f7
TG		 217}
218
8301aa0b 219DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 220
6eab614d 221int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 222 Link *link;
11a7f229
TG		 223
224 assert(m);
e856ed00 225 assert(ifindex > 0);
11a7f229 226
6eab614d 227 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 228 if (!link)
229 return -ENODEV;
230
0b54c870
YW		 231 if (ret)
232 *ret = link;
233 return 0;
234}
235
236int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
237 Link *link;
238
239 assert(m);
240 assert(ifname);
11a7f229 241
0b54c870
YW		 242 link = hashmap_get(m->links_by_name, ifname);
243 if (!link)
244 return -ENODEV;
245
246 if (ret)
247 *ret = link;
11a7f229
TG		 248 return 0;
249}
250
fe321d45
YW		 251int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
252 Link *link;
253
254 assert(m);
255 assert(hw_addr);
256
257 link = hashmap_get(m->links_by_hw_addr, hw_addr);
258 if (!link)
259 return -ENODEV;
260
261 if (ret)
262 *ret = link;
263 return 0;
264}
265
81357285
YW		 266int link_get_master(Link *link, Link **ret) {
267 assert(link);
268 assert(link->manager);
269 assert(ret);
270
271 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
272 return -ENODEV;
273
6eab614d 274 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 275}
276
af9ba57a 277void link_set_state(Link *link, LinkState state) {
e331e246
TG		 278 assert(link);
279
280 if (link->state == state)
281 return;
282
0beb9542
YW		 283 log_link_debug(link, "State changed: %s -> %s",
284 link_state_to_string(link->state),
285 link_state_to_string(state));
286
e331e246
TG		 287 link->state = state;
288
289 link_send_changed(link, "AdministrativeState", NULL);
9092113d 290 link_dirty(link);
e331e246
TG		 291}
292
2a99eed0 293int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 294 int r = 0, k;
295
296 assert(link);
297 assert(link->manager);
298 assert(link->manager->event);
299
80060352
ZJS		 300 bool keep_dhcp = may_keep_dhcp &&
301 link->network &&
76a86ffd 302 !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */
80060352
ZJS		 303 (link->manager->restarting ||
304 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
305
84add3cd 306 if (!keep_dhcp) {
111bb8f9 307 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 308 if (k < 0)
36c7d709 309 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 310 }
311
2a99eed0
YW		 312 k = sd_dhcp_server_stop(link->dhcp_server);
313 if (k < 0)
314 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
315
35778343 316 k = sd_lldp_rx_stop(link->lldp_rx);
9cc65242 317 if (k < 0)
c01b9b87
YW		 318 r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m");
319
320 k = sd_lldp_tx_stop(link->lldp_tx);
321 if (k < 0)
322 r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m");
9cc65242 323
84add3cd
YW		 324 k = sd_ipv4ll_stop(link->ipv4ll);
325 if (k < 0)
326 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 327
76a86ffd 328 k = ipv4acd_stop(link);
2488e4d9
YW		 329 if (k < 0)
330 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 331
84add3cd
YW		 332 k = sd_dhcp6_client_stop(link->dhcp6_client);
333 if (k < 0)
334 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 335
a27588d4 336 k = dhcp_pd_remove(link, /* only_marked = */ false);
2ffd6d73
YW		 337 if (k < 0)
338 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 339
77302468 340 k = ndisc_stop(link);
84add3cd
YW		 341 if (k < 0)
342 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 343
259c65f3
YW		 344 ndisc_flush(link);
345
84add3cd
YW		 346 k = sd_radv_stop(link->radv);
347 if (k < 0)
348 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 349
111bb8f9
TG		 350 return r;
351}
352
b22d8a00 353void link_enter_failed(Link *link) {
ef1ba606 354 assert(link);
f882c247 355
370e9930 356 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 357 return;
358
6a7a4e4d 359 log_link_warning(link, "Failed");
449f7554 360
e331e246 361 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 362
2a99eed0 363 (void) link_stop_engines(link, false);
f882c247
TG		 364}
365
6accfd31
DA		 366void link_check_ready(Link *link) {
367 Address *a;
6accfd31
DA		 368
369 assert(link);
370
5f58af25
YW		 371 if (link->state == LINK_STATE_CONFIGURED)
372 return;
373
d19b9939
YW		 374 if (link->state != LINK_STATE_CONFIGURING)
375 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 376
377 if (!link->network)
a7f07cbe 378 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 379
7558f9e7
YW		 380 if (!link->tc_configured)
381 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 382
a7f07cbe
YW		 383 if (link->set_link_messages > 0)
384 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
385
386 if (!link->activated)
387 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
388
7558f9e7
YW		 389 if (link->iftype == ARPHRD_CAN) {
390 /* let's shortcut things for CAN which doesn't need most of checks below. */
391 link_set_state(link, LINK_STATE_CONFIGURED);
392 return;
393 }
394
879377ca
YW		 395 if (!link->stacked_netdevs_created)
396 return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__);
397
76c5a0f2 398 if (!link->static_addresses_configured)
d19b9939 399 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 400
354bc760
YW		 401 if (!link->static_address_labels_configured)
402 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
403
e5b35bf6
YW		 404 if (!link->static_bridge_fdb_configured)
405 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
406
ff9e0783
YW		 407 if (!link->static_bridge_mdb_configured)
408 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
409
fdeba3f5
YW		 410 if (!link->static_ipv6_proxy_ndp_configured)
411 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
412
40ca350e
YW		 413 if (!link->static_neighbors_configured)
414 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
415
d19b9939
YW		 416 if (!link->static_nexthops_configured)
417 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 418
76c5a0f2
YW		 419 if (!link->static_routes_configured)
420 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
421
0e5ef6be 422 if (!link->static_routing_policy_rules_configured)
d19b9939 423 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 424
d19b9939
YW		 425 if (!link->sr_iov_configured)
426 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 427
4bcb8625
YW		 428 /* IPv6LL is assigned after the link gains its carrier. */
429 if (!link->network->configure_without_carrier &&
430 link_ipv6ll_enabled(link) &&
431 !in6_addr_is_set(&link->ipv6ll_address))
432 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
433
9e7d91ed
YW		 434 /* All static addresses must be ready. */
435 bool has_static_address = false;
436 SET_FOREACH(a, link->addresses) {
437 if (a->source != NETWORK_CONFIG_SOURCE_STATIC)
438 continue;
439 if (!address_is_ready(a))
440 return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__,
441 IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen));
442 has_static_address = true;
443 }
444
445 /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */
446 if (has_static_address)
447 goto ready;
448
5f950e56
YW		 449 /* If no dynamic addressing protocol enabled, assume the interface is ready.
450 * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
451 if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) &&
452 !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) &&
453 (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link)))
454 goto ready;
455
456 bool ipv4ll_ready =
457 link_ipv4ll_enabled(link) && link->ipv4ll_address_configured &&
458 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL);
459 bool dhcp4_ready =
460 link_dhcp4_enabled(link) && link->dhcp4_configured &&
461 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4);
462 bool dhcp6_ready =
463 link_dhcp6_enabled(link) && link->dhcp6_configured &&
464 (!link->network->dhcp6_use_address ||
465 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6));
466 bool dhcp_pd_ready =
467 link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured &&
468 (!link->network->dhcp_pd_assign ||
469 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD));
470 bool ndisc_ready =
471 link_ipv6_accept_ra_enabled(link) && link->ndisc_configured &&
472 (!link->network->ipv6_accept_ra_use_autonomous_prefix ||
473 link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC));
474
195b83ed
YW		 475 /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */
476 if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) {
477 if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd &&
478 link->dhcp_lease && dhcp4_lease_has_pd_prefix(link->dhcp_lease)) {
479 if (!dhcp4_ready)
480 return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__);
481 if (!dhcp_pd_ready)
482 return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__);
483 }
484
485 if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix &&
486 link->dhcp6_lease && dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) {
487 if (!dhcp6_ready)
488 return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__);
489 if (!dhcp_pd_ready)
490 return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__);
491 }
492 }
493
5f950e56
YW		 494 /* At least one dynamic addressing protocol is finished. */
495 if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready)
496 return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__);
497
498 log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s",
499 __func__,
500 yes_no(ipv4ll_ready),
501 yes_no(dhcp4_ready),
502 yes_no(dhcp6_ready),
503 yes_no(dhcp_pd_ready),
504 yes_no(ndisc_ready));
505
506ready:
29836c16 507 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 508}
509
97108953 510static int link_request_static_configs(Link *link) {
f882c247
TG		 511 int r;
512
513 assert(link);
514 assert(link->network);
f5be5601 515 assert(link->state != _LINK_STATE_INVALID);
f882c247 516
354bc760 517 r = link_request_static_addresses(link);
0e5ef6be
YW		 518 if (r < 0)
519 return r;
520
354bc760 521 r = link_request_static_address_labels(link);
f3ef324d
YW		 522 if (r < 0)
523 return r;
e4a71bf3 524
e5b35bf6
YW		 525 r = link_request_static_bridge_fdb(link);
526 if (r < 0)
527 return r;
528
9a038aac
YW		 529 r = link_request_static_bridge_mdb(link);
530 if (r < 0)
531 return r;
532
fdeba3f5
YW		 533 r = link_request_static_ipv6_proxy_ndp_addresses(link);
534 if (r < 0)
535 return r;
536
40ca350e 537 r = link_request_static_neighbors(link);
682c65b0
YW		 538 if (r < 0)
539 return r;
bd6379ec 540
76c5a0f2 541 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 542 if (r < 0)
543 return r;
f882c247 544
76c5a0f2
YW		 545 r = link_request_static_routes(link, false);
546 if (r < 0)
547 return r;
548
549 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 550 if (r < 0)
551 return r;
d4cdbea5 552
f882c247
TG		 553 return 0;
554}
555
1187fc33
YW		 556static int link_request_stacked_netdevs(Link *link) {
557 NetDev *netdev;
e16e4b3b
DS		 558 int r;
559
560 assert(link);
561
1187fc33 562 link->stacked_netdevs_created = false;
e16e4b3b 563
1187fc33 564 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
b14686ff 565 r = link_request_stacked_netdev(link, netdev);
1187fc33
YW		 566 if (r < 0)
567 return r;
568 }
e16e4b3b 569
bb916f35 570 if (link->create_stacked_netdev_messages == 0) {
1187fc33 571 link->stacked_netdevs_created = true;
bb916f35
YW		 572 link_check_ready(link);
573 }
e16e4b3b
DS		 574
575 return 0;
576}
577
8566df79 578static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 579 int r;
580
581 assert(link);
582
0f96a823
YW		 583 r = radv_start(link);
584 if (r < 0)
585 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m");
7465dd22 586
294f129b
YW		 587 r = ndisc_start(link);
588 if (r < 0)
589 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 590
294f129b
YW		 591 r = dhcp6_start(link);
592 if (r < 0)
593 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 594
e7ab854c
TG		 595 return 0;
596}
597
8566df79 598static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 599 int r;
600
601 assert(link);
ff254138
TG		 602 assert(link->manager);
603 assert(link->manager->event);
604
0107b769 605 if (link->dhcp_client) {
294f129b 606 r = dhcp4_start(link);
0107b769 607 if (r < 0)
294f129b 608 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 609
ccffa166 610 log_link_debug(link, "Acquiring DHCPv4 lease.");
5c1d3fc9 611
ccffa166 612 } else if (link->ipv4ll) {
59c27231
AK		 613 if (in4_addr_is_set(&link->network->ipv4ll_start_address)) {
614 r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
615 if (r < 0)
616 return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m");
617 }
618
5c1d3fc9 619 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 620 if (r < 0)
621 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
ccffa166
YW		 622
623 log_link_debug(link, "Acquiring IPv4 link-local address.");
5c1d3fc9
UTL		 624 }
625
ab486ef4
YW		 626 if (link->dhcp_server) {
627 r = sd_dhcp_server_start(link->dhcp_server);
628 if (r < 0)
629 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
630 }
631
76a86ffd
YW		 632 r = ipv4acd_start(link);
633 if (r < 0)
634 return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m");
635
6fc25497
SS		 636 return 0;
637}
638
8566df79 639static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 640 int r;
641
642 assert(link);
0f96a823 643 assert(link->network);
6fc25497 644
8566df79 645 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 646 if (r < 0)
647 return r;
648
94876904 649 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 650 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 651 if (r < 0)
652 return r;
653 }
654
a27588d4 655 if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) {
0f96a823
YW		 656 /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be
657 * configured, and RADV may not be configured yet here. Only acquire subnet prefix when
658 * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the
659 * below will be called in radv_start(). */
a27588d4 660 r = dhcp_request_prefix_delegation(link);
0f96a823 661 if (r < 0)
a27588d4 662 return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m");
0f96a823
YW		 663 }
664
c01b9b87
YW		 665 if (link->lldp_tx) {
666 r = sd_lldp_tx_start(link->lldp_tx);
667 if (r < 0)
668 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
669 }
8e1ad1ea 670
35778343
YW		 671 if (link->lldp_rx) {
672 r = sd_lldp_rx_start(link->lldp_rx);
f8549910
YW		 673 if (r < 0)
674 return log_link_warning_errno(link, r, "Failed to start LLDP client: %m");
675 }
676
ff254138
TG		 677 return 0;
678}
679
7657ec3e 680int link_ipv6ll_gained(Link *link) {
0c9ee5d5 681 int r;
deb2e523 682
0c9ee5d5 683 assert(link);
deb2e523 684
0c9ee5d5 685 log_link_info(link, "Gained IPv6LL");
deb2e523 686
7657ec3e
YW		 687 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
688 return 0;
0c9ee5d5 689
7657ec3e
YW		 690 r = link_acquire_dynamic_ipv6_conf(link);
691 if (r < 0)
692 return r;
0c9ee5d5 693
7657ec3e 694 link_check_ready(link);
0c9ee5d5 695 return 0;
deb2e523
TG		 696}
697
112a0972 698int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 699 bool required_up = false;
700 bool link_is_up = false;
852a3916 701 Link *l;
0d4ad91d
AR		 702
703 assert(link);
704
ad82f0c3
YW		 705 /* If at least one interface in bound_to_links has carrier, then make this interface up.
706 * If all interfaces in bound_to_links do not, then make this interface down. */
707
0d4ad91d
AR		 708 if (hashmap_isempty(link->bound_to_links))
709 return 0;
710
711 if (link->flags & IFF_UP)
712 link_is_up = true;
713
852a3916 714 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 715 if (link_has_carrier(l)) {
716 required_up = true;
717 break;
718 }
719
852a3916 720 if (!required_up && link_is_up)
68f52063 721 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 722 if (required_up && !link_is_up)
68f52063 723 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 724
725 return 0;
726}
727
728static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 729 Link *l;
730 int r;
731
732 assert(link);
733
ad82f0c3
YW		 734 /* Update up or down state of interfaces which depend on this interface's carrier state. */
735
0d4ad91d
AR		 736 if (hashmap_isempty(link->bound_by_links))
737 return 0;
738
852a3916 739 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 740 r = link_handle_bound_to_list(l);
741 if (r < 0)
742 return r;
743 }
744
745 return 0;
746}
747
748static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
749 int r;
750
751 assert(link);
752 assert(carrier);
753
754 if (link == carrier)
755 return 0;
756
757 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
758 return 0;
759
190b3b5c 760 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 761 if (r < 0)
762 return r;
763
9092113d
YW		 764 link_dirty(link);
765
0d4ad91d
AR		 766 return 0;
767}
768
769static int link_new_bound_by_list(Link *link) {
770 Manager *m;
771 Link *carrier;
0d4ad91d 772 int r;
0d4ad91d
AR		 773
774 assert(link);
775 assert(link->manager);
776
777 m = link->manager;
778
6eab614d 779 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 780 if (!carrier->network)
781 continue;
782
783 if (strv_isempty(carrier->network->bind_carrier))
784 continue;
785
191a3f16 786 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 787 r = link_put_carrier(link, carrier, &link->bound_by_links);
788 if (r < 0)
789 return r;
0d4ad91d
AR		 790 }
791 }
792
90e74a66 793 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 794 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
795 if (r < 0)
796 return r;
0d4ad91d
AR		 797 }
798
799 return 0;
800}
801
802static int link_new_bound_to_list(Link *link) {
803 Manager *m;
804 Link *carrier;
0d4ad91d 805 int r;
0d4ad91d
AR		 806
807 assert(link);
808 assert(link->manager);
809
810 if (!link->network)
811 return 0;
812
813 if (strv_isempty(link->network->bind_carrier))
814 return 0;
815
816 m = link->manager;
817
6eab614d 818 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 819 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 820 r = link_put_carrier(link, carrier, &link->bound_to_links);
821 if (r < 0)
822 return r;
0d4ad91d
AR		 823 }
824 }
825
852a3916 826 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 827 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
828 if (r < 0)
829 return r;
0d4ad91d
AR		 830 }
831
832 return 0;
833}
834
0d4ad91d 835static void link_free_bound_to_list(Link *link) {
9092113d 836 bool updated = false;
0d4ad91d 837 Link *bound_to;
0d4ad91d 838
9092113d
YW		 839 assert(link);
840
841 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
842 updated = true;
0d4ad91d
AR		 843
844 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 845 link_dirty(bound_to);
0d4ad91d
AR		 846 }
847
9092113d
YW		 848 if (updated)
849 link_dirty(link);
0d4ad91d
AR		 850}
851
852static void link_free_bound_by_list(Link *link) {
9092113d 853 bool updated = false;
0d4ad91d 854 Link *bound_by;
0d4ad91d 855
9092113d
YW		 856 assert(link);
857
858 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
859 updated = true;
0d4ad91d
AR		 860
861 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 862 link_dirty(bound_by);
0d4ad91d
AR		 863 link_handle_bound_to_list(bound_by);
864 }
865 }
866
9092113d
YW		 867 if (updated)
868 link_dirty(link);
0d4ad91d
AR		 869}
870
81357285 871static int link_append_to_master(Link *link) {
5f707e12
YW		 872 Link *master;
873 int r;
874
875 assert(link);
5f707e12 876
81357285
YW		 877 /* - The link may have no master.
878 * - RTM_NEWLINK message about master interface may not be received yet. */
879 if (link_get_master(link, &master) < 0)
880 return 0;
5f707e12 881
de7fef4b 882 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 883 if (r <= 0)
5f707e12
YW		 884 return r;
885
886 link_ref(link);
887 return 0;
888}
889
81357285 890static void link_drop_from_master(Link *link) {
5f707e12
YW		 891 Link *master;
892
893 assert(link);
894
81357285 895 if (!link->manager)
5f707e12
YW		 896 return;
897
81357285 898 if (link_get_master(link, &master) < 0)
5f707e12
YW		 899 return;
900
901 link_unref(set_remove(master->slaves, link));
902}
903
56001f02
YW		 904static void link_drop_requests(Link *link) {
905 Request *req;
906
907 assert(link);
908 assert(link->manager);
909
910 ORDERED_SET_FOREACH(req, link->manager->request_queue)
911 if (req->link == link)
e26d3d40 912 request_detach(link->manager, req);
56001f02
YW		 913}
914
cc2d7efc 915static Link *link_drop(Link *link) {
63130eb3 916 if (!link)
cc2d7efc 917 return NULL;
0d4ad91d 918
63130eb3
YW		 919 assert(link->manager);
920
0d4ad91d
AR		 921 link_set_state(link, LINK_STATE_LINGER);
922
63130eb3
YW		 923 /* Drop all references from other links and manager. Note that async netlink calls may have
924 * references to the link, and they will be dropped when we receive replies. */
925
56001f02
YW		 926 link_drop_requests(link);
927
bb193d2d
YW		 928 link_free_bound_to_list(link);
929 link_free_bound_by_list(link);
0d4ad91d 930
b0ff6dea
YW		 931 link_clear_sr_iov_ifindices(link);
932
81357285 933 link_drop_from_master(link);
5f707e12 934
4c78dc17
YW		 935 if (link->state_file)
936 (void) unlink(link->state_file);
937
63130eb3
YW		 938 link_clean(link);
939
0b54c870
YW		 940 STRV_FOREACH(n, link->alternative_names)
941 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 942 hashmap_remove(link->manager->links_by_name, link->ifname);
943
fe321d45 944 /* bonding master and its slaves have the same hardware address. */
e74f1d07 945 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45 946
63130eb3 947 /* The following must be called at last. */
6eab614d 948 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 949 return link_unref(link);
0d4ad91d
AR		 950}
951
5e5b137a 952static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 953 int k, r;
954
955 assert(link);
956 assert(link->manager);
5e5b137a 957
5e3bb5da
YW		 958 /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want
959 * to remove loopback address or addresses used for root NFS. */
960
961 if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
962 return 0;
963 if (FLAGS_SET(link->flags, IFF_LOOPBACK))
964 return 0;
965 if (link->network->keep_configuration == KEEP_CONFIGURATION_YES)
966 return 0;
967
e36d601c 968 r = link_drop_foreign_routes(link);
5e5b137a 969
e36d601c 970 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 971 if (k < 0 && r >= 0)
972 r = k;
973
e36d601c 974 k = link_drop_foreign_addresses(link);
0b81225e
YW		 975 if (k < 0 && r >= 0)
976 r = k;
d1bdafd2 977
e36d601c 978 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 979 if (k < 0 && r >= 0)
980 r = k;
981
0b81225e
YW		 982 k = manager_drop_foreign_routing_policy_rules(link->manager);
983 if (k < 0 && r >= 0)
984 r = k;
985
986 return r;
5e5b137a
TG		 987}
988
a0e99a37 989static int link_drop_managed_config(Link *link) {
0b81225e
YW		 990 int k, r;
991
992 assert(link);
993 assert(link->manager);
3104883d 994
a0e99a37 995 r = link_drop_managed_routes(link);
3104883d 996
a0e99a37 997 k = link_drop_managed_nexthops(link);
0b81225e
YW		 998 if (k < 0 && r >= 0)
999 r = k;
d1bdafd2 1000
a0e99a37 1001 k = link_drop_managed_addresses(link);
0b81225e
YW		 1002 if (k < 0 && r >= 0)
1003 r = k;
1004
a0e99a37 1005 k = link_drop_managed_neighbors(link);
25b82b6e
YW		 1006 if (k < 0 && r >= 0)
1007 r = k;
1008
a0e99a37 1009 k = link_drop_managed_routing_policy_rules(link);
0b81225e
YW		 1010 if (k < 0 && r >= 0)
1011 r = k;
3104883d 1012
0b81225e 1013 return r;
3104883d
SS		 1014}
1015
b4564f4e
YW		 1016static void link_foreignize_config(Link *link) {
1017 assert(link);
1018 assert(link->manager);
1019
1020 link_foreignize_routes(link);
1021 link_foreignize_nexthops(link);
1022 link_foreignize_addresses(link);
1023 link_foreignize_neighbors(link);
1024 link_foreignize_routing_policy_rules(link);
1025}
1026
c3b94251 1027static int link_configure(Link *link) {
4ecdcb07
YW		 1028 int r;
1029
ef1ba606 1030 assert(link);
b22d8a00 1031 assert(link->network);
bd08ce56 1032 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1033
1187fc33
YW		 1034 link_set_state(link, LINK_STATE_CONFIGURING);
1035
3cf58ef3
YW		 1036 r = link_new_bound_to_list(link);
1037 if (r < 0)
1038 return r;
1039
1dec9d81 1040 r = link_request_traffic_control(link);
4ecdcb07
YW		 1041 if (r < 0)
1042 return r;
1043
7558f9e7
YW		 1044 if (link->iftype == ARPHRD_CAN) {
1045 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1046 r = link_request_to_set_can(link);
1047 if (r < 0)
1048 return r;
1049
1050 return link_request_to_activate(link);
1051 }
1052
cb8453cc 1053 r = link_request_sr_iov_vfs(link);
518cd6b5
SS		 1054 if (r < 0)
1055 return r;
1056
5e0534f1 1057 r = link_set_sysctl(link);
b69c3180
SS		 1058 if (r < 0)
1059 return r;
8749cbcd 1060
d05c332c 1061 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1062 if (r < 0)
1063 return r;
1064
72e65e6f
YW		 1065 r = link_request_to_set_ipoib(link);
1066 if (r < 0)
1067 return r;
1068
1187fc33 1069 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1070 if (r < 0)
1071 return r;
1072
1187fc33 1073 r = link_request_to_set_group(link);
99d2baa2
SS		 1074 if (r < 0)
1075 return r;
1076
1187fc33
YW		 1077 r = link_configure_mtu(link);
1078 if (r < 0)
1079 return r;
1080
1081 r = link_request_to_set_addrgen_mode(link);
1082 if (r < 0)
1083 return r;
1084
1085 r = link_request_to_set_master(link);
1086 if (r < 0)
1087 return r;
1088
1089 r = link_request_stacked_netdevs(link);
1090 if (r < 0)
1091 return r;
1092
1093 r = link_request_to_set_bond(link);
1094 if (r < 0)
1095 return r;
1096
1097 r = link_request_to_set_bridge(link);
1098 if (r < 0)
1099 return r;
1100
1101 r = link_request_to_set_bridge_vlan(link);
1102 if (r < 0)
1103 return r;
1104
1105 r = link_request_to_activate(link);
89fe6535
SS		 1106 if (r < 0)
1107 return r;
1108
2ffd6d73
YW		 1109 r = ipv4ll_configure(link);
1110 if (r < 0)
1111 return r;
64b21ece 1112
ccffa166 1113 r = link_request_dhcp4_client(link);
2ffd6d73
YW		 1114 if (r < 0)
1115 return r;
eb34d4af 1116
ccffa166 1117 r = link_request_dhcp6_client(link);
2ffd6d73
YW		 1118 if (r < 0)
1119 return r;
f5a8c43f 1120
ba4c7184 1121 r = link_request_ndisc(link);
2ffd6d73
YW		 1122 if (r < 0)
1123 return r;
4138fb2c 1124
1d28a3cf
YW		 1125 r = link_request_dhcp_server(link);
1126 if (r < 0)
1127 return r;
1128
a254fab2 1129 r = link_request_radv(link);
086b8853
YW		 1130 if (r < 0)
1131 return r;
7465dd22 1132
2ffd6d73
YW		 1133 r = link_lldp_rx_configure(link);
1134 if (r < 0)
1135 return r;
ce43e484 1136
c01b9b87
YW		 1137 r = link_lldp_tx_configure(link);
1138 if (r < 0)
1139 return r;
1140
5e3bb5da
YW		 1141 r = link_drop_foreign_config(link);
1142 if (r < 0)
1143 return r;
4c649652 1144
1187fc33
YW		 1145 r = link_request_static_configs(link);
1146 if (r < 0)
1147 return r;
1148
1149 if (!link_has_carrier(link))
1150 return 0;
1151
1152 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1153}
1154
170e88c8
YW		 1155static int link_get_network(Link *link, Network **ret) {
1156 Network *network;
1a3caa49 1157 int r;
170e88c8
YW		 1158
1159 assert(link);
1160 assert(link->manager);
1161 assert(ret);
1162
1163 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1164 bool warn = false;
1165
1a3caa49 1166 r = net_match_config(
170e88c8 1167 &network->match,
8de56fb3 1168 link->dev,
52135071
YW		 1169 &link->hw_addr,
1170 &link->permanent_hw_addr,
170e88c8
YW		 1171 link->driver,
1172 link->iftype,
65022cd7 1173 link->kind,
170e88c8
YW		 1174 link->ifname,
1175 link->alternative_names,
1176 link->wlan_iftype,
1177 link->ssid,
1a3caa49
YW		 1178 &link->bssid);
1179 if (r < 0)
1180 return r;
1181 if (r == 0)
170e88c8
YW		 1182 continue;
1183
8de56fb3 1184 if (network->match.ifname && link->dev) {
170e88c8
YW		 1185 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1186 const char *attr;
1187
8de56fb3 1188 if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0)
170e88c8
YW		 1189 (void) safe_atou8(attr, &name_assign_type);
1190
1191 warn = name_assign_type == NET_NAME_ENUM;
1192 }
1193
1194 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1195 "found matching network '%s'%s.",
1196 network->filename,
1197 warn ? ", based on potentially unpredictable interface name" : "");
1198
1199 if (network->unmanaged)
1200 return -ENOENT;
1201
1202 *ret = network;
1203 return 0;
1204 }
1205
1206 return -ENOENT;
1207}
1208
8a4ad01a 1209int link_reconfigure_impl(Link *link, bool force) {
cb71e9c6 1210 Network *network = NULL;
9aa2585e 1211 NetDev *netdev = NULL;
ad932b15
YW		 1212 int r;
1213
5a1860f7 1214 assert(link);
572b21d9 1215
4faca0a3 1216 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
fb961119
YW		 1217 return 0;
1218
9aa2585e
YW		 1219 r = netdev_get(link->manager, link->ifname, &netdev);
1220 if (r < 0 && r != -ENOENT)
1221 return r;
1222
170e88c8 1223 r = link_get_network(link, &network);
cb71e9c6 1224 if (r < 0 && r != -ENOENT)
ad932b15
YW		 1225 return r;
1226
fb961119
YW		 1227 if (link->state != LINK_STATE_UNMANAGED && !network)
1228 /* If link is in initialized state, then link->network is also NULL. */
1229 force = true;
1230
99b8517c 1231 if (link->network == network && !force)
ad932b15
YW		 1232 return 0;
1233
fb961119
YW		 1234 if (network) {
1235 if (link->state == LINK_STATE_INITIALIZED)
1236 log_link_info(link, "Configuring with %s.", network->filename);
1237 else
1238 log_link_info(link, "Reconfiguring with %s.", network->filename);
1239 } else
1240 log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO,
1241 "Unmanaging interface.");
ad932b15
YW		 1242
1243 /* Dropping old .network file */
2a99eed0 1244 r = link_stop_engines(link, false);
572b21d9 1245 if (r < 0)
ad932b15 1246 return r;
ad932b15 1247
19d9a5ad
YW		 1248 link_drop_requests(link);
1249
81db4f3d 1250 if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES)
b4564f4e
YW		 1251 /* When a new/updated .network file is assigned, first make all configs (addresses,
1252 * routes, and so on) foreign, and then drop unnecessary configs later by
81db4f3d
YW		 1253 * link_drop_foreign_config() in link_configure().
1254 * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence,
1255 * here we need to drop the configs such as addresses, routes, and so on configured by
1256 * the previously assigned .network file. */
b4564f4e
YW		 1257 link_foreignize_config(link);
1258 else {
a0e99a37
YW		 1259 /* Remove all managed configs. Note, foreign configs are removed in later by
1260 * link_configure() -> link_drop_foreign_config() if the link is managed by us. */
1261 r = link_drop_managed_config(link);
b4564f4e
YW		 1262 if (r < 0)
1263 return r;
1264 }
ad932b15 1265
3cf58ef3
YW		 1266 /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the
1267 * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will
1268 * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the
1269 * map here, as it depends on .network files assigned to other links. */
1270 link_free_bound_to_list(link);
1271
ad932b15
YW		 1272 link_free_engines(link);
1273 link->network = network_unref(link->network);
1274
9aa2585e
YW		 1275 netdev_unref(link->netdev);
1276 link->netdev = netdev_ref(netdev);
1277
cb71e9c6
YW		 1278 if (!network) {
1279 link_set_state(link, LINK_STATE_UNMANAGED);
1280 return 0;
1281 }
1282
ad932b15 1283 /* Then, apply new .network file */
9092113d 1284 link->network = network_ref(network);
b156a95d 1285 link_update_operstate(link, true);
9092113d 1286 link_dirty(link);
ad932b15 1287
ad932b15 1288 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1289 link->activated = false;
ad932b15 1290
ad932b15
YW		 1291 r = link_configure(link);
1292 if (r < 0)
1293 return r;
1294
0e397560 1295 return 1;
ad932b15
YW		 1296}
1297
96f5f9ef 1298static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1299 int r;
1300
d09a179e
YW		 1301 assert(link);
1302
5a1860f7
YW		 1303 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1304 if (r <= 0)
1305 return r;
1306
7f80fa12 1307 r = link_reconfigure_impl(link, force);
d09a179e 1308 if (r < 0) {
572b21d9 1309 link_enter_failed(link);
d09a179e
YW		 1310 return 0;
1311 }
572b21d9 1312
d09a179e 1313 return r;
572b21d9
YW		 1314}
1315
5a1860f7 1316static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1317 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false);
5a1860f7 1318}
572b21d9 1319
5a1860f7 1320static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
96f5f9ef 1321 return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true);
572b21d9
YW		 1322}
1323
a39a9ac8 1324int link_reconfigure(Link *link, bool force) {
d09a179e
YW		 1325 int r;
1326
1327 assert(link);
d09a179e 1328
8bceafa7 1329 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1330 * the function from being called multiple times simultaneously, refuse to reconfigure the
1331 * interface in these cases. */
8bceafa7 1332 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1333 return 0; /* 0 means no-op. */
2c0d7ed3 1334
a39a9ac8 1335 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1336 if (r < 0)
1337 return r;
1338
8bceafa7 1339 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1340}
1341
e6bf7774 1342static int link_initialized_and_synced(Link *link) {
505f8da7
TG		 1343 int r;
1344
1345 assert(link);
505f8da7
TG		 1346 assert(link->manager);
1347
faa2e64f
YW		 1348 if (link->manager->test_mode) {
1349 log_link_debug(link, "Running in test mode, refusing to enter initialized state.");
1350 link_set_state(link, LINK_STATE_UNMANAGED);
1351 return 0;
1352 }
1353
40695457
YW		 1354 if (link->state == LINK_STATE_PENDING) {
1355 log_link_debug(link, "Link state is up-to-date");
1356 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1357
40695457
YW		 1358 r = link_new_bound_by_list(link);
1359 if (r < 0)
1360 return r;
0d4ad91d 1361
40695457
YW		 1362 r = link_handle_bound_by_list(link);
1363 if (r < 0)
1364 return r;
1365 }
0d4ad91d 1366
fb961119 1367 return link_reconfigure_impl(link, /* force = */ false);
505f8da7
TG		 1368}
1369
302a796f 1370static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1371 int r;
1372
5a1860f7
YW		 1373 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1374 if (r <= 0)
0b54c870 1375 return r;
572b21d9 1376
4ff296b0
YW		 1377 r = link_initialized_and_synced(link);
1378 if (r < 0)
1379 link_enter_failed(link);
5a1860f7
YW		 1380
1381 return 0;
e6bf7774
YW		 1382}
1383
3be9d62a 1384static int link_initialized(Link *link, sd_device *device) {
b0ff6dea
YW		 1385 int r;
1386
4f561e8e 1387 assert(link);
4f561e8e
TG		 1388 assert(device);
1389
160203e9
YW		 1390 /* Always replace with the new sd_device object. As the sysname (and possibly other properties
1391 * or sysattrs) may be outdated. */
8de56fb3 1392 device_unref_and_replace(link->dev, device);
4f561e8e 1393
3b1dbdf0
YW		 1394 if (link->dhcp_client) {
1395 r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev);
1396 if (r < 0)
1397 log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m");
1398 }
1399
1400 if (link->dhcp6_client) {
1401 r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev);
1402 if (r < 0)
1403 log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m");
1404 }
1405
b0ff6dea
YW		 1406 r = link_set_sr_iov_ifindices(link);
1407 if (r < 0)
1408 log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m");
1409
40695457
YW		 1410 if (link->state != LINK_STATE_PENDING)
1411 return link_reconfigure(link, /* force = */ false);
679b3605 1412
79008bdd 1413 log_link_debug(link, "udev initialized link");
4f561e8e 1414
3c9b8860
TG		 1415 /* udev has initialized the link, but we don't know if we have yet
1416 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1417 * when it returns we know that the pending NEWLINKs have already been
1418 * processed and that we are up-to-date */
4f561e8e 1419
5a1860f7 1420 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1421}
1422
0d411b7f 1423static int link_check_initialized(Link *link) {
51517f9e 1424 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1425 int r;
505f8da7 1426
0d411b7f 1427 assert(link);
505f8da7 1428
82f52245 1429 if (!udev_available())
0d411b7f 1430 return link_initialized_and_synced(link);
852a3916
YW		 1431
1432 /* udev should be around */
0ac655a6 1433 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1434 if (r < 0) {
1435 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1436 return 0;
1437 }
1438
1439 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1440 if (r < 0)
1441 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1442 if (r == 0) {
1443 /* not yet ready */
1444 log_link_debug(link, "link pending udev initialization...");
1445 return 0;
1446 }
1447
1448 r = device_is_renaming(device);
0d411b7f
YW		 1449 if (r < 0)
1450 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1451 if (r > 0) {
1452 log_link_debug(link, "Interface is being renamed, pending initialization.");
1453 return 0;
4f561e8e 1454 }
505f8da7 1455
0d411b7f 1456 return link_initialized(link, device);
a748b692
TG		 1457}
1458
1fd3ac1e 1459int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) {
3be9d62a 1460 int r, ifindex;
1fd3ac1e 1461 Link *link;
3be9d62a
YW		 1462
1463 assert(m);
1464 assert(device);
1465
3be9d62a 1466 r = sd_device_get_ifindex(device, &ifindex);
1fd3ac1e
YW		 1467 if (r < 0)
1468 return log_device_debug_errno(device, r, "Failed to get ifindex: %m");
3be9d62a 1469
75255a8d
YW		 1470 r = link_get_by_index(m, ifindex, &link);
1471 if (r < 0) {
1472 /* This error is not critical, as the corresponding rtnl message may be received later. */
1473 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
1474 return 0;
1475 }
1476
1477 /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link
1478 * object here. It will be removed only when rtnetlink says so. */
1479 if (action == SD_DEVICE_REMOVE) {
1480 link->dev = sd_device_unref(link->dev);
1481 return 0;
1482 }
1483
3be9d62a 1484 r = device_is_renaming(device);
1fd3ac1e
YW		 1485 if (r < 0)
1486 return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m");
3be9d62a 1487 if (r > 0) {
1fd3ac1e 1488 log_device_debug(device, "Device is renaming, waiting for the interface to be renamed.");
71cdfe16
YW		 1489 /* TODO:
1490 * What happens when a device is initialized, then soon renamed after that? When we detect
1491 * such, maybe we should cancel or postpone all queued requests for the interface. */
3be9d62a
YW		 1492 return 0;
1493 }
1494
4b9a8c2b
YW		 1495 r = link_initialized(link, device);
1496 if (r < 0)
1497 link_enter_failed(link);
3be9d62a
YW		 1498
1499 return 0;
1500}
1501
9c0a72f9 1502static int link_carrier_gained(Link *link) {
6706ce2f 1503 bool force_reconfigure;
9c0a72f9
TG		 1504 int r;
1505
1506 assert(link);
1507
6706ce2f
YW		 1508 r = event_source_disable(link->carrier_lost_timer);
1509 if (r < 0)
1510 log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m");
1511
d9910948
YW		 1512 /* If a wireless interface was connected to an access point, and the SSID is changed (that is,
1513 * both previous_ssid and ssid are non-NULL), then the connected wireless network could be
1514 * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be
1515 * restarted, and the correct network information will be gained.
1516 *
1517 * However, do not reconfigure the wireless interface forcibly if it was not connected to any
1518 * access points previously (previous_ssid is NULL in this case). As, a .network file may be
1519 * already assigned to the interface (in that case, the .network file does not have the SSID=
1520 * setting in the [Match] section), and the interface is already being configured. Of course,
1521 * there may exist another .network file with higher priority and a matching SSID= setting. But
1522 * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag.
1523 *
6706ce2f 1524 * For non-wireless interfaces, we have no way to detect the connected network change. So,
d9910948
YW		 1525 * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */
1526 force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid);
6706ce2f
YW		 1527 link->previous_ssid = mfree(link->previous_ssid);
1528
986b2514
AŠ		 1529 /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network
1530 * profile wants to match on it with SSID= in its [Match] section.
1531 */
1532 if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) {
1533 r = link_get_wlan_interface(link);
1534 if (r < 0)
1535 return r;
1536 }
1537
081466bd
YW		 1538 /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to
1539 * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call
1540 * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */
1541 r = link_reconfigure_impl(link, force_reconfigure);
1542 if (r != 0)
1543 return r;
b7ac1284 1544
aa9117c0
YW		 1545 r = link_handle_bound_by_list(link);
1546 if (r < 0)
1547 return r;
1548
600b7898
YW		 1549 if (link->iftype == ARPHRD_CAN)
1550 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1551 return 0;
600b7898 1552
b9ea3d2e 1553 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1554 r = link_acquire_dynamic_conf(link);
f0269653 1555 if (r < 0)
9c0a72f9 1556 return r;
6fc25497 1557
97108953 1558 r = link_request_static_configs(link);
6fc25497
SS		 1559 if (r < 0)
1560 return r;
9c0a72f9
TG		 1561 }
1562
aa9117c0 1563 return 0;
9c0a72f9
TG		 1564}
1565
6706ce2f
YW		 1566static int link_carrier_lost_impl(Link *link) {
1567 int r, ret = 0;
1568
1569 assert(link);
1570
1571 link->previous_ssid = mfree(link->previous_ssid);
1572
1573 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1574 return 0;
1575
1576 if (!link->network)
1577 return 0;
1578
1579 r = link_stop_engines(link, false);
1580 if (r < 0)
1581 ret = r;
1582
a0e99a37 1583 r = link_drop_managed_config(link);
6706ce2f
YW		 1584 if (r < 0 && ret >= 0)
1585 ret = r;
1586
1587 return ret;
1588}
1589
1590static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) {
99534007 1591 Link *link = ASSERT_PTR(userdata);
6706ce2f
YW		 1592 int r;
1593
6706ce2f
YW		 1594 r = link_carrier_lost_impl(link);
1595 if (r < 0) {
1596 log_link_warning_errno(link, r, "Failed to process carrier lost event: %m");
1597 link_enter_failed(link);
1598 }
1599
1600 return 0;
1601}
1602
9c0a72f9 1603static int link_carrier_lost(Link *link) {
b7326069
YW		 1604 uint16_t dhcp_mtu;
1605 usec_t usec;
9c0a72f9
TG		 1606 int r;
1607
1608 assert(link);
1609
aa9117c0
YW		 1610 r = link_handle_bound_by_list(link);
1611 if (r < 0)
1612 return r;
93b4dab5 1613
600b7898
YW		 1614 if (link->iftype == ARPHRD_CAN)
1615 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1616 return 0;
1617
f1c22cf4
YW		 1618 if (!link->network)
1619 return 0;
1620
b7326069
YW		 1621 if (link->network->ignore_carrier_loss_set)
1622 /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */
1623 usec = link->network->ignore_carrier_loss_usec;
1624
1625 else if (link->network->bond && link->wlan_iftype > 0)
1626 /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its
1627 * carrier to be lost. See #19832. */
1628 usec = 3 * USEC_PER_SEC;
1629
1630 else if (link->network->dhcp_use_mtu &&
1631 link->dhcp_lease &&
1632 sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 &&
1633 dhcp_mtu != link->original_mtu)
1634 /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static
1635 * MTU should not cause any issues, as MTU is changed only once. However, setting MTU
1636 * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */
1637 usec = 5 * USEC_PER_SEC;
1638
1639 else
1640 /* Otherwise, use the currently set value. */
1641 usec = link->network->ignore_carrier_loss_usec;
1642
1643 if (usec == USEC_INFINITY)
aa9117c0 1644 return 0;
600b7898 1645
b7326069 1646 if (usec == 0)
6706ce2f
YW		 1647 return link_carrier_lost_impl(link);
1648
1649 return event_reset_time_relative(link->manager->event,
1650 &link->carrier_lost_timer,
ba4e0427 1651 CLOCK_BOOTTIME,
b7326069 1652 usec,
6706ce2f
YW		 1653 0,
1654 link_carrier_lost_handler,
1655 link,
1656 0,
1657 "link-carrier-loss",
1658 true);
0c9ee5d5
YW		 1659}
1660
0c9ee5d5
YW		 1661static int link_admin_state_up(Link *link) {
1662 int r;
1663
1664 assert(link);
1665
1666 /* This is called every time an interface admin state changes to up;
1667 * specifically, when IFF_UP flag changes from unset to set. */
1668
1669 if (!link->network)
1670 return 0;
1671
899b0e5e 1672 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
1a054a20 1673 log_link_info(link, "Activation policy is \"always-down\", forcing link down.");
712fd5d2 1674 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1675 }
1676
1677 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1678 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1679 r = link_set_ipv6_mtu(link);
1680 if (r < 0)
1681 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1682
1683 return 0;
1684}
1685
1686static int link_admin_state_down(Link *link) {
1687 assert(link);
1688
1689 if (!link->network)
1690 return 0;
1691
899b0e5e 1692 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
1a054a20 1693 log_link_info(link, "Activation policy is \"always-up\", forcing link up.");
712fd5d2 1694 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1695 }
1696
1697 return 0;
1698}
1699
0c9ee5d5
YW		 1700static bool link_is_enslaved(Link *link) {
1701 if (link->flags & IFF_SLAVE)
0c9ee5d5
YW		 1702 return true;
1703
1f024462 1704 if (link->master_ifindex > 0)
0c9ee5d5
YW		 1705 return true;
1706
0c9ee5d5
YW		 1707 return false;
1708}
1709
1710static LinkAddressState address_state_from_scope(uint8_t scope) {
1711 if (scope < RT_SCOPE_SITE)
1712 /* universally accessible addresses found */
1713 return LINK_ADDRESS_STATE_ROUTABLE;
1714
1715 if (scope < RT_SCOPE_HOST)
1716 /* only link or site local addresses found */
1717 return LINK_ADDRESS_STATE_DEGRADED;
1718
1719 /* no useful addresses found */
1720 return LINK_ADDRESS_STATE_OFF;
1721}
1722
1723void link_update_operstate(Link *link, bool also_update_master) {
1724 LinkOperationalState operstate;
1725 LinkCarrierState carrier_state;
1726 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1727 LinkOnlineState online_state;
1728 _cleanup_strv_free_ char **p = NULL;
1729 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1730 bool changed = false;
1731 Address *address;
1732
1733 assert(link);
1734
1735 if (link->kernel_operstate == IF_OPER_DORMANT)
1736 carrier_state = LINK_CARRIER_STATE_DORMANT;
1737 else if (link_has_carrier(link)) {
1738 if (link_is_enslaved(link))
1739 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1740 else
1741 carrier_state = LINK_CARRIER_STATE_CARRIER;
1742 } else if (link->flags & IFF_UP)
1743 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1744 else
1745 carrier_state = LINK_CARRIER_STATE_OFF;
1746
1747 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1748 Link *slave;
1749
1750 SET_FOREACH(slave, link->slaves) {
1751 link_update_operstate(slave, false);
1752
1753 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1754 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1755 }
1756 }
1757
1758 SET_FOREACH(address, link->addresses) {
1759 if (!address_is_ready(address))
1760 continue;
1761
1762 if (address->family == AF_INET)
1763 ipv4_scope = MIN(ipv4_scope, address->scope);
1764
1765 if (address->family == AF_INET6)
1766 ipv6_scope = MIN(ipv6_scope, address->scope);
1767 }
1768
0c9ee5d5
YW		 1769 ipv4_address_state = address_state_from_scope(ipv4_scope);
1770 ipv6_address_state = address_state_from_scope(ipv6_scope);
1771 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1772
1773 /* Mapping of address and carrier state vs operational state
1774 * carrier state
1775 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1776 * ------------------------------------------------------------------------------
1777 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
cf4dbd84
HH		 1778 * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved
1779 * routable | off | no-carrier | dormant | routable | routable | routable
0c9ee5d5
YW		 1780 */
1781
cf4dbd84
HH		 1782 if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE)
1783 operstate = LINK_OPERSTATE_ROUTABLE;
1784 else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED)
1785 operstate = LINK_OPERSTATE_DEGRADED;
1786 else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
0c9ee5d5
YW		 1787 operstate = (LinkOperationalState) carrier_state;
1788 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1789 operstate = LINK_OPERSTATE_ROUTABLE;
1790 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1791 operstate = LINK_OPERSTATE_DEGRADED;
1792 else
1793 operstate = LINK_OPERSTATE_ENSLAVED;
1794
1795 /* Only determine online state for managed links with RequiredForOnline=yes */
1796 if (!link->network || !link->network->required_for_online)
1797 online_state = _LINK_ONLINE_STATE_INVALID;
1798 else if (operstate < link->network->required_operstate_for_online.min ||
1799 operstate > link->network->required_operstate_for_online.max)
1800 online_state = LINK_ONLINE_STATE_OFFLINE;
1801 else {
1802 AddressFamily required_family = link->network->required_family_for_online;
1803 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1804 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1805
1806 /* The operational state is within the range required for online.
1807 * If a particular address family is also required, we might revert
1808 * to offline in the blocks below. */
1809 online_state = LINK_ONLINE_STATE_ONLINE;
1810
1811 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1812 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1813 online_state = LINK_ONLINE_STATE_OFFLINE;
1814 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1815 online_state = LINK_ONLINE_STATE_OFFLINE;
1816 }
1817
1818 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1819 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1820 online_state = LINK_ONLINE_STATE_OFFLINE;
1821 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1822 online_state = LINK_ONLINE_STATE_OFFLINE;
1823 }
1824 }
1825
1826 if (link->carrier_state != carrier_state) {
1827 link->carrier_state = carrier_state;
1828 changed = true;
1829 if (strv_extend(&p, "CarrierState") < 0)
1830 log_oom();
1831 }
1832
1833 if (link->address_state != address_state) {
1834 link->address_state = address_state;
1835 changed = true;
1836 if (strv_extend(&p, "AddressState") < 0)
1837 log_oom();
1838 }
0d4ad91d 1839
0c9ee5d5
YW		 1840 if (link->ipv4_address_state != ipv4_address_state) {
1841 link->ipv4_address_state = ipv4_address_state;
1842 changed = true;
1843 if (strv_extend(&p, "IPv4AddressState") < 0)
1844 log_oom();
1845 }
9c0a72f9 1846
0c9ee5d5
YW		 1847 if (link->ipv6_address_state != ipv6_address_state) {
1848 link->ipv6_address_state = ipv6_address_state;
1849 changed = true;
1850 if (strv_extend(&p, "IPv6AddressState") < 0)
1851 log_oom();
1852 }
9c0a72f9 1853
0c9ee5d5
YW		 1854 if (link->operstate != operstate) {
1855 link->operstate = operstate;
1856 changed = true;
1857 if (strv_extend(&p, "OperationalState") < 0)
1858 log_oom();
1859 }
9c0a72f9 1860
0c9ee5d5
YW		 1861 if (link->online_state != online_state) {
1862 link->online_state = online_state;
1863 changed = true;
1864 if (strv_extend(&p, "OnlineState") < 0)
1865 log_oom();
1866 }
9c0a72f9 1867
0c9ee5d5
YW		 1868 if (p)
1869 link_send_changed_strv(link, p);
1870 if (changed)
1871 link_dirty(link);
9c0a72f9 1872
0c9ee5d5
YW		 1873 if (also_update_master) {
1874 Link *master;
9c0a72f9 1875
0c9ee5d5
YW		 1876 if (link_get_master(link, &master) >= 0)
1877 link_update_operstate(master, true);
1878 }
9c0a72f9
TG		 1879}
1880
0c9ee5d5
YW		 1881#define FLAG_STRING(string, flag, old, new) \
1882 (((old ^ new) & flag) \
1883 ? ((old & flag) ? (" -" string) : (" +" string)) \
1884 : "")
1885
0d411b7f 1886static int link_update_flags(Link *link, sd_netlink_message *message) {
96f5f9ef 1887 bool link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1888 uint8_t operstate;
1889 unsigned flags;
d236718c
DS		 1890 int r;
1891
61135582 1892 assert(link);
0d411b7f 1893 assert(message);
61135582 1894
0d411b7f 1895 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1896 if (r < 0)
0d411b7f 1897 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1898
0d411b7f
YW		 1899 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1900 if (r == -ENODATA)
1901 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1902 operstate = link->kernel_operstate;
0d411b7f
YW		 1903 else if (r < 0)
1904 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1905
0d411b7f 1906 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1907 return 0;
1908
0c9ee5d5
YW		 1909 if (link->flags != flags) {
1910 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1911
0c9ee5d5
YW		 1912 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",
1913 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1914 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1915 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1916 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1917 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1918 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1919 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1920 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1921 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1922 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1923 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1924 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1925 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1926 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1927 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1928 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1929 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1930 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1931 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1932
0c9ee5d5
YW		 1933 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1934 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1935 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1936 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1937 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1938 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1939 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1940 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1941
0c9ee5d5
YW		 1942 if (unknown_flags_added)
1943 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1944
0c9ee5d5
YW		 1945 if (unknown_flags_removed)
1946 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1947 }
61135582 1948
0d411b7f
YW		 1949 link_was_admin_up = link->flags & IFF_UP;
1950 had_carrier = link_has_carrier(link);
1951
0c9ee5d5
YW		 1952 link->flags = flags;
1953 link->kernel_operstate = operstate;
36161cba 1954
0c9ee5d5 1955 link_update_operstate(link, true);
61135582 1956
0d411b7f
YW		 1957 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1958 log_link_info(link, "Link UP");
22936833 1959
0d411b7f
YW		 1960 r = link_admin_state_up(link);
1961 if (r < 0)
1962 return r;
1963 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1964 log_link_info(link, "Link DOWN");
0d4ad91d 1965
0d411b7f 1966 r = link_admin_state_down(link);
0d4ad91d
AR		 1967 if (r < 0)
1968 return r;
7619683b
TG		 1969 }
1970
0d411b7f
YW		 1971 if (!had_carrier && link_has_carrier(link)) {
1972 log_link_info(link, "Gained carrier");
0d4ad91d 1973
0d411b7f 1974 r = link_carrier_gained(link);
30de2b89
YW		 1975 if (r < 0)
1976 return r;
0d411b7f
YW		 1977 } else if (had_carrier && !link_has_carrier(link)) {
1978 log_link_info(link, "Lost carrier");
1979
1980 r = link_carrier_lost(link);
0b54c870
YW		 1981 if (r < 0)
1982 return r;
b8941f74
TG		 1983 }
1984
0d411b7f
YW		 1985 return 0;
1986}
afe7fd56 1987
0d411b7f
YW		 1988static int link_update_master(Link *link, sd_netlink_message *message) {
1989 int master_ifindex, r;
7465dd22 1990
0d411b7f
YW		 1991 assert(link);
1992 assert(message);
69629de9 1993
0d411b7f
YW		 1994 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1995 if (r == -ENODATA)
1996 return 0;
1997 if (r < 0)
1998 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1999
571bf1aa
YW		 2000 if (master_ifindex == link->ifindex)
2001 master_ifindex = 0;
2002
0d411b7f
YW		 2003 if (master_ifindex == link->master_ifindex)
2004 return 0;
807667f7 2005
0d411b7f 2006 if (link->master_ifindex == 0)
8458ca26 2007 log_link_debug(link, "Attached to master interface: %i", master_ifindex);
0d411b7f 2008 else if (master_ifindex == 0)
8458ca26 2009 log_link_debug(link, "Detached from master interface: %i", link->master_ifindex);
0d411b7f 2010 else
e2341b6b
DT		 2011 log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex,
2012 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex);
807667f7 2013
0d411b7f 2014 link_drop_from_master(link);
807667f7 2015
0d411b7f 2016 link->master_ifindex = master_ifindex;
413708d1 2017
0d411b7f
YW		 2018 r = link_append_to_master(link);
2019 if (r < 0)
2020 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 2021
0d411b7f
YW		 2022 return 0;
2023}
807667f7 2024
e1658632
YW		 2025static int link_update_driver(Link *link, sd_netlink_message *message) {
2026 int r;
2027
2028 assert(link);
2029 assert(link->manager);
2030 assert(message);
2031
2032 /* Driver is already read. Assuming the driver is never changed. */
6625c39e 2033 if (link->ethtool_driver_read)
e1658632
YW		 2034 return 0;
2035
2036 /* When udevd is running, read the driver after the interface is initialized by udevd.
2037 * Otherwise, ethtool may not work correctly. See issue #22538.
2038 * When udevd is not running, read the value when the interface is detected. */
6625c39e 2039 if (udev_available() && !link->dev)
e1658632
YW		 2040 return 0;
2041
6625c39e
YW		 2042 link->ethtool_driver_read = true;
2043
e1658632
YW		 2044 r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver);
2045 if (r < 0) {
2046 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2047 return 0;
2048 }
2049
2050 log_link_debug(link, "Found driver: %s", strna(link->driver));
2051
2052 if (streq_ptr(link->driver, "dsa")) {
2053 uint32_t dsa_master_ifindex = 0;
2054
2055 r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex);
2056 if (r < 0 && r != -ENODATA)
2057 return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m");
2058
2059 if (dsa_master_ifindex > INT_MAX) {
2060 log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.",
2061 dsa_master_ifindex);
2062 dsa_master_ifindex = 0;
2063 }
2064
2065 link->dsa_master_ifindex = (int) dsa_master_ifindex;
2066 }
2067
40695457 2068 return 1; /* needs reconfigure */
e1658632
YW		 2069}
2070
6625c39e 2071static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) {
e1658632
YW		 2072 int r;
2073
2074 assert(link);
2075 assert(link->manager);
2076 assert(message);
2077
6625c39e 2078 if (link->ethtool_permanent_hw_addr_read)
e1658632
YW		 2079 return 0;
2080
2081 /* When udevd is running, read the permanent hardware address after the interface is
2082 * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538.
2083 * When udevd is not running, read the value when the interface is detected. */
6625c39e
YW		 2084 if (udev_available() && !link->dev)
2085 return 0;
2086
2087 /* If the interface does not have a hardware address, then it will not have a permanent address either. */
2088 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL);
2089 if (r == -ENODATA)
2090 return 0;
2091 if (r < 0)
2092 return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m");
2093
2094 link->ethtool_permanent_hw_addr_read = true;
2095
2096 r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr);
2097 if (r < 0)
2098 log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m");
2099
2100 return 0;
2101}
2102
2103static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) {
2104 int r;
2105
2106 assert(link);
2107 assert(link->manager);
2108 assert(message);
2109
2110 if (link->permanent_hw_addr.length > 0)
e1658632
YW		 2111 return 0;
2112
2113 r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr);
2114 if (r < 0) {
2115 if (r != -ENODATA)
2116 return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m");
2117
6625c39e
YW		 2118 /* Fallback to ethtool for older kernels. */
2119 r = link_update_permanent_hardware_address_from_ethtool(link, message);
2120 if (r < 0)
2121 return r;
e1658632
YW		 2122 }
2123
2124 if (link->permanent_hw_addr.length > 0)
2125 log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr));
2126
40695457 2127 return 1; /* needs reconfigure */
e1658632
YW		 2128}
2129
0d411b7f 2130static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
e2bacccd 2131 struct hw_addr_data addr;
0d411b7f 2132 int r;
d93d655c 2133
0d411b7f
YW		 2134 assert(link);
2135 assert(message);
dfc58b47 2136
0d411b7f
YW		 2137 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2138 if (r < 0 && r != -ENODATA)
2139 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2140
e2bacccd 2141 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr);
0d411b7f
YW		 2142 if (r == -ENODATA)
2143 return 0;
2144 if (r < 0)
fe321d45 2145 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2146
e2bacccd 2147 if (hw_addr_equal(&link->hw_addr, &addr))
0d411b7f 2148 return 0;
a61bb41c 2149
de0f1579 2150 if (link->hw_addr.length == 0)
e2bacccd 2151 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr));
fe321d45 2152 else {
e2341b6b
DT		 2153 log_link_debug(link, "Hardware address is changed: %s %s %s",
2154 HW_ADDR_TO_STR(&link->hw_addr),
2155 special_glyph(SPECIAL_GLYPH_ARROW_RIGHT),
2156 HW_ADDR_TO_STR(&addr));
0d411b7f 2157
e74f1d07 2158 hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link);
fe321d45
YW		 2159 }
2160
e2bacccd
YW		 2161 link->hw_addr = addr;
2162
fe321d45
YW		 2163 if (!hw_addr_is_null(&link->hw_addr)) {
2164 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2165 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2166 /* bonding master and its slaves have the same hardware address. */
2167 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2168 if (r < 0)
2169 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2170 }
0d411b7f 2171
0a14f83a 2172 r = ipv4acd_update_mac(link);
76a86ffd
YW		 2173 if (r < 0)
2174 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
2175
0d411b7f 2176 r = ipv4ll_update_mac(link);
a61bb41c 2177 if (r < 0)
0d411b7f 2178 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2179
0d411b7f
YW		 2180 r = dhcp4_update_mac(link);
2181 if (r < 0)
2182 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2183
0d411b7f
YW		 2184 r = dhcp6_update_mac(link);
2185 if (r < 0)
2186 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2187
2188 r = radv_update_mac(link);
2189 if (r < 0)
2190 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2191
3be64aa4 2192 if (link->ndisc && link->hw_addr.length == ETH_ALEN) {
ca2b7cd8 2193 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2194 if (r < 0)
0d411b7f
YW		 2195 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2196 }
d236718c 2197
35778343
YW		 2198 if (link->lldp_rx) {
2199 r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether);
61135582 2200 if (r < 0)
c01b9b87
YW		 2201 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m");
2202 }
2203
2204 if (link->lldp_tx) {
2205 r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether);
2206 if (r < 0)
2207 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m");
61135582
DS		 2208 }
2209
40695457 2210 return 1; /* needs reconfigure */
0d411b7f 2211}
a61bb41c 2212
0d411b7f 2213static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2214 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2215 int r;
a61bb41c 2216
0d411b7f
YW		 2217 assert(link);
2218 assert(message);
2219
2220 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2221 if (r == -ENODATA)
2222 return 0;
2223 if (r < 0)
2224 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2225 if (mtu == 0)
2226 return 0;
0d411b7f 2227
717ba5fc
YW		 2228 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2229 if (r < 0 && r != -ENODATA)
2230 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2231
2232 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2233 if (r < 0 && r != -ENODATA)
2234 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2235
717ba5fc
YW		 2236 if (max_mtu == 0)
2237 max_mtu = UINT32_MAX;
2238
2239 link->min_mtu = min_mtu;
2240 link->max_mtu = max_mtu;
2241
0d411b7f
YW		 2242 if (link->original_mtu == 0) {
2243 link->original_mtu = mtu;
717ba5fc
YW		 2244 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2245 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2246 }
2247
717ba5fc
YW		 2248 if (link->mtu == mtu)
2249 return 0;
2250
b5d0fd1e 2251 if (link->mtu != 0)
e2341b6b
DT		 2252 log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2253 link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu,
2254 link->min_mtu, link->max_mtu);
0d411b7f
YW		 2255
2256 link->mtu = mtu;
2257
2258 if (link->dhcp_client) {
2259 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2260 if (r < 0)
0d411b7f
YW		 2261 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2262 }
a61bb41c 2263
0d411b7f
YW		 2264 if (link->radv) {
2265 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2266 if (r < 0)
0d411b7f 2267 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2268 }
2269
2270 return 0;
dd3efc09 2271}
fe8db0c5 2272
0d411b7f
YW		 2273static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2274 _cleanup_strv_free_ char **altnames = NULL;
0d411b7f
YW		 2275 int r;
2276
2277 assert(link);
2278 assert(message);
2279
2280 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
50df02a7 2281 if (r == -ENODATA)
2368ff81 2282 /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the
50df02a7
YW		 2283 * interface has no alternative name. */
2284 return 0;
2285 if (r < 0)
0d411b7f
YW		 2286 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2287
1b345c1e
YW		 2288 if (strv_equal(altnames, link->alternative_names))
2289 return 0;
2290
0d411b7f
YW		 2291 STRV_FOREACH(n, link->alternative_names)
2292 hashmap_remove(link->manager->links_by_name, *n);
2293
2294 strv_free_and_replace(link->alternative_names, altnames);
2295
2296 STRV_FOREACH(n, link->alternative_names) {
2297 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2298 if (r < 0)
2299 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2300 }
2301
40695457 2302 return 1; /* needs reconfigure */
0d411b7f
YW		 2303}
2304
2305static int link_update_name(Link *link, sd_netlink_message *message) {
01afd0f7 2306 char ifname_from_index[IF_NAMESIZE];
0d411b7f
YW		 2307 const char *ifname;
2308 int r;
2309
2310 assert(link);
2311 assert(message);
2312
2313 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2314 if (r == -ENODATA)
7802194a 2315 /* Hmm?? But ok. */
0d411b7f
YW		 2316 return 0;
2317 if (r < 0)
2318 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2319
2320 if (streq(ifname, link->ifname))
2321 return 0;
2322
01afd0f7
YW		 2323 r = format_ifname(link->ifindex, ifname_from_index);
2324 if (r < 0)
2325 return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex);
176b8be1
YW		 2326
2327 if (!streq(ifname, ifname_from_index)) {
2328 log_link_debug(link, "New interface name '%s' received from the kernel does not correspond "
2329 "with the name currently configured on the actual interface '%s'. Ignoring.",
2330 ifname, ifname_from_index);
2331 return 0;
2332 }
2333
0d411b7f
YW		 2334 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2335
2336 hashmap_remove(link->manager->links_by_name, link->ifname);
2337
2338 r = free_and_strdup(&link->ifname, ifname);
2339 if (r < 0)
2340 return log_oom_debug();
2341
2342 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2343 if (r < 0)
2344 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2345
54d1fdb2
YW		 2346 if (link->dhcp_client) {
2347 r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname);
2348 if (r < 0)
2349 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m");
2350 }
2351
2352 if (link->dhcp6_client) {
2353 r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname);
2354 if (r < 0)
2355 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m");
2356 }
2357
2358 if (link->ndisc) {
2359 r = sd_ndisc_set_ifname(link->ndisc, link->ifname);
2360 if (r < 0)
2361 return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m");
2362 }
2363
2364 if (link->dhcp_server) {
2365 r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname);
2366 if (r < 0)
2367 return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m");
2368 }
2369
2370 if (link->radv) {
2371 r = sd_radv_set_ifname(link->radv, link->ifname);
2372 if (r < 0)
2373 return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m");
2374 }
2375
35778343
YW		 2376 if (link->lldp_rx) {
2377 r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname);
54d1fdb2 2378 if (r < 0)
c01b9b87
YW		 2379 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m");
2380 }
2381
2382 if (link->lldp_tx) {
2383 r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname);
2384 if (r < 0)
2385 return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m");
54d1fdb2
YW		 2386 }
2387
2388 if (link->ipv4ll) {
2389 r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname);
2390 if (r < 0)
2391 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m");
2392 }
2393
86173383
YW		 2394 r = ipv4acd_set_ifname(link);
2395 if (r < 0)
2396 return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m");
54d1fdb2 2397
40695457 2398 return 1; /* needs reconfigure */
0d411b7f
YW		 2399}
2400
2401static int link_update(Link *link, sd_netlink_message *message) {
40695457 2402 bool needs_reconfigure = false;
0d411b7f
YW		 2403 int r;
2404
2405 assert(link);
2406 assert(message);
2407
2408 r = link_update_name(link, message);
2409 if (r < 0)
2410 return r;
40695457 2411 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2412
2413 r = link_update_alternative_names(link, message);
2414 if (r < 0)
2415 return r;
40695457 2416 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2417
2418 r = link_update_mtu(link, message);
2419 if (r < 0)
2420 return r;
2421
e1658632
YW		 2422 r = link_update_driver(link, message);
2423 if (r < 0)
2424 return r;
40695457 2425 needs_reconfigure = needs_reconfigure || r > 0;
e1658632
YW		 2426
2427 r = link_update_permanent_hardware_address(link, message);
2428 if (r < 0)
2429 return r;
40695457 2430 needs_reconfigure = needs_reconfigure || r > 0;
e1658632 2431
0d411b7f
YW		 2432 r = link_update_hardware_address(link, message);
2433 if (r < 0)
2434 return r;
40695457 2435 needs_reconfigure = needs_reconfigure || r > 0;
0d411b7f
YW		 2436
2437 r = link_update_master(link, message);
2438 if (r < 0)
2439 return r;
2440
7d0d832d
YW		 2441 r = link_update_ipv6ll_addrgen_mode(link, message);
2442 if (r < 0)
2443 return r;
2444
40695457
YW		 2445 r = link_update_flags(link, message);
2446 if (r < 0)
2447 return r;
2448
2449 return needs_reconfigure;
0d411b7f
YW		 2450}
2451
0c9ee5d5
YW		 2452static Link *link_drop_or_unref(Link *link) {
2453 if (!link)
2454 return NULL;
2455 if (!link->manager)
2456 return link_unref(link);
2457 return link_drop(link);
2458}
2459
2460DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2461
2462static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2463 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2464 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2465 unsigned short iftype;
2466 int r, ifindex;
0c9ee5d5
YW		 2467
2468 assert(manager);
2469 assert(message);
2470 assert(ret);
2471
0c9ee5d5
YW		 2472 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2473 if (r < 0)
0d411b7f 2474 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2475 else if (ifindex <= 0)
0d411b7f 2476 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2477
2478 r = sd_rtnl_message_link_get_type(message, &iftype);
2479 if (r < 0)
0d411b7f 2480 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2481
2482 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2483 if (r < 0)
0d411b7f 2484 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2485
2486 /* check for link kind */
2487 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2488 if (r >= 0) {
0d411b7f
YW		 2489 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2490 if (r < 0 && r != -ENODATA)
2491 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2492 r = sd_netlink_message_exit_container(message);
2493 if (r < 0)
0d411b7f 2494 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2495 }
2496
4c78dc17
YW		 2497 if (!manager->test_mode) {
2498 /* Do not update state files when running in test mode. */
2499 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2500 return log_oom_debug();
0d411b7f 2501
4c78dc17
YW		 2502 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2503 return log_oom_debug();
0d411b7f 2504
4c78dc17
YW		 2505 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2506 return log_oom_debug();
2507 }
0d411b7f 2508
0c9ee5d5
YW		 2509 link = new(Link, 1);
2510 if (!link)
2511 return -ENOMEM;
2512
2513 *link = (Link) {
2514 .n_ref = 1,
2515 .state = LINK_STATE_PENDING,
2516 .online_state = _LINK_ONLINE_STATE_INVALID,
2517 .ifindex = ifindex,
2518 .iftype = iftype,
2519 .ifname = TAKE_PTR(ifname),
2520 .kind = TAKE_PTR(kind),
2521
7d0d832d
YW		 2522 .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID,
2523
0d411b7f
YW		 2524 .state_file = TAKE_PTR(state_file),
2525 .lease_file = TAKE_PTR(lease_file),
2526 .lldp_file = TAKE_PTR(lldp_file),
2527
0c9ee5d5
YW		 2528 .n_dns = UINT_MAX,
2529 .dns_default_route = -1,
2530 .llmnr = _RESOLVE_SUPPORT_INVALID,
2531 .mdns = _RESOLVE_SUPPORT_INVALID,
2532 .dnssec_mode = _DNSSEC_MODE_INVALID,
2533 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2534 };
2535
6eab614d 2536 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2537 if (r < 0)
0d411b7f 2538 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2539
2540 link->manager = manager;
2541
0d411b7f 2542 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2543 if (r < 0)
0d411b7f 2544 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5 2545
8a77e245
YW		 2546 log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s",
2547 link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind));
2548
9c5b8d46
AŠ		 2549 /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE
2550 * message arrived too early. Request the wireless link information again.
2551 */
2552 if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) {
2553 r = link_get_wlan_interface(link);
2554 if (r < 0)
2555 log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m");
2556 }
2557
0c9ee5d5 2558 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2559 return 0;
2560}
2561
0d411b7f 2562int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2563 Link *link = NULL;
2564 NetDev *netdev = NULL;
2565 uint16_t type;
2566 const char *name;
2567 int r, ifindex;
2568
2569 assert(rtnl);
2570 assert(message);
0d411b7f 2571 assert(manager);
3be9d62a
YW		 2572
2573 if (sd_netlink_message_is_error(message)) {
2574 r = sd_netlink_message_get_errno(message);
2575 if (r < 0)
2576 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2577
2578 return 0;
2579 }
2580
2581 r = sd_netlink_message_get_type(message, &type);
2582 if (r < 0) {
2583 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2584 return 0;
2585 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2586 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2587 return 0;
2588 }
2589
2590 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2591 if (r < 0) {
2592 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2593 return 0;
2594 } else if (ifindex <= 0) {
2595 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2596 return 0;
2597 }
2598
2599 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2600 if (r < 0) {
2601 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2602 return 0;
2603 }
2604
6eab614d 2605 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2606 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2607
2608 switch (type) {
2609 case RTM_NEWLINK:
0d411b7f
YW		 2610 if (netdev) {
2611 /* netdev exists, so make sure the ifindex matches */
2612 r = netdev_set_ifindex(netdev, message);
2613 if (r < 0) {
66141164 2614 log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m");
0d411b7f
YW		 2615 return 0;
2616 }
2617 }
2618
3be9d62a
YW		 2619 if (!link) {
2620 /* link is new, so add it */
0d411b7f 2621 r = link_new(manager, message, &link);
3be9d62a 2622 if (r < 0) {
0d411b7f 2623 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2624 return 0;
2625 }
3be9d62a 2626
0d411b7f 2627 r = link_update(link, message);
3be9d62a 2628 if (r < 0) {
66141164 2629 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f 2630 link_enter_failed(link);
3be9d62a
YW		 2631 return 0;
2632 }
3be9d62a 2633
0d411b7f
YW		 2634 r = link_check_initialized(link);
2635 if (r < 0) {
66141164 2636 log_link_warning_errno(link, r, "Failed to check link is initialized: %m");
0d411b7f
YW		 2637 link_enter_failed(link);
2638 return 0;
2639 }
2640 } else {
2641 r = link_update(link, message);
2642 if (r < 0) {
66141164 2643 log_link_warning_errno(link, r, "Could not process link message: %m");
0d411b7f
YW		 2644 link_enter_failed(link);
2645 return 0;
2646 }
40695457
YW		 2647 if (r > 0) {
2648 r = link_reconfigure_impl(link, /* force = */ false);
2649 if (r < 0) {
2650 log_link_warning_errno(link, r, "Failed to reconfigure interface: %m");
2651 link_enter_failed(link);
2652 return 0;
2653 }
2654 }
3be9d62a 2655 }
3be9d62a
YW		 2656 break;
2657
2658 case RTM_DELLINK:
2659 link_drop(link);
2660 netdev_drop(netdev);
3be9d62a
YW		 2661 break;
2662
2663 default:
04499a70 2664 assert_not_reached();
3be9d62a
YW		 2665 }
2666
2667 return 1;
2668}
2669
79c6e114
YW		 2670int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2671 uint16_t message_type;
2672 int r;
2673
2674 assert(m);
2675 assert(link);
2676 assert(error_msg);
2677
2678 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2679 return 0;
2680
2681 r = sd_netlink_message_get_errno(m);
2682 if (r < 0) {
2683 log_link_message_warning_errno(link, m, r, error_msg);
2684 link_enter_failed(link);
2685 return 0;
2686 }
2687
2688 r = sd_netlink_message_get_type(m, &message_type);
2689 if (r < 0) {
2690 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2691 return 0;
2692 }
2693 if (message_type != RTM_NEWLINK) {
2694 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2695 return 0;
2696 }
2697
2698 r = link_update(link, m);
2699 if (r < 0) {
2700 link_enter_failed(link);
2701 return 0;
2702 }
2703
2704 return 1;
2705}
2706
2707int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2708 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2709 int r;
2710
2711 assert(link);
2712 assert(link->manager);
2713 assert(link->manager->rtnl);
2714 assert(callback);
2715
2716 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2717 if (r < 0)
2718 return r;
2719
2720 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2721 link_netlink_destroy_callback, link);
2722 if (r < 0)
2723 return r;
2724
2725 link_ref(link);
2726 return 0;
2727}
2728
fe8db0c5 2729static const char* const link_state_table[_LINK_STATE_MAX] = {
0580badc 2730 [LINK_STATE_PENDING] = "pending",
bd08ce56 2731 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2732 [LINK_STATE_CONFIGURING] = "configuring",
0580badc
ZJS		 2733 [LINK_STATE_CONFIGURED] = "configured",
2734 [LINK_STATE_UNMANAGED] = "unmanaged",
2735 [LINK_STATE_FAILED] = "failed",
2736 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2737};
2738
2739DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
7ae55b78
YW		 2740
2741int link_flags_to_string_alloc(uint32_t flags, char **ret) {
2742 _cleanup_free_ char *str = NULL;
19aa7eeb
ZJS		 2743 static const char* map[] = {
2744 [LOG2U(IFF_UP)] = "up", /* interface is up. */
0b75493d 2745 [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */
19aa7eeb
ZJS		 2746 [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */
2747 [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */
2748 [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */
2749 [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */
2750 [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */
2751 [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */
2752 [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */
2753 [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */
2754 [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */
2755 [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */
0b75493d 2756 [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */
19aa7eeb
ZJS		 2757 [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */
2758 [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */
2759 [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */
2760 [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */
2761 [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */
2762 [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */
7ae55b78
YW		 2763 };
2764
2765 assert(ret);
2766
2767 for (size_t i = 0; i < ELEMENTSOF(map); i++)
19aa7eeb
ZJS		 2768 if (FLAGS_SET(flags, 1 << i) && map[i])
2769 if (!strextend_with_separator(&str, ",", map[i]))
2770 return -ENOMEM;
7ae55b78
YW		 2771
2772 *ret = TAKE_PTR(str);
2773 return 0;
2774}
2775
2776static const char * const kernel_operstate_table[] = {
2777 [IF_OPER_UNKNOWN] = "unknown",
2778 [IF_OPER_NOTPRESENT] = "not-present",
2779 [IF_OPER_DOWN] = "down",
2780 [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down",
2781 [IF_OPER_TESTING] = "testing",
2782 [IF_OPER_DORMANT] = "dormant",
2783 [IF_OPER_UP] = "up",
2784};
2785
2786DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int);
Unnamed repository; edit this file 'description' to name the repository.