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dhcp: use unlink_and_freep() in dhcp_lease_save()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
c0267a59 10#include "batadv.h"
737f1405
YW		 11#include "bond.h"
12#include "bridge.h"
1346b1f0 13#include "bus-util.h"
3be9d62a
YW		 14#include "device-private.h"
15#include "device-util.h"
27dfc982 16#include "dhcp-identifier.h"
bd91b83e 17#include "dhcp-lease-internal.h"
686d13b9 18#include "env-file.h"
4bb7cc82 19#include "ethtool-util.h"
3ffd4af2 20#include "fd-util.h"
cf1d700d 21#include "fileio.h"
af664001 22#include "fs-util.h"
737f1405 23#include "ipvlan.h"
ef118d00 24#include "missing_network.h"
cf1d700d 25#include "netlink-util.h"
c6f7c917 26#include "network-internal.h"
fb486c90 27#include "networkd-address-label.h"
093e3533 28#include "networkd-address.h"
3ddcbeea 29#include "networkd-can.h"
8fcf1d61 30#include "networkd-dhcp-server.h"
ca5ad760
YW		 31#include "networkd-dhcp4.h"
32#include "networkd-dhcp6.h"
ee446d57 33#include "networkd-fdb.h"
ca5ad760 34#include "networkd-ipv4ll.h"
6a1af3d4
YW		 35#include "networkd-link-bus.h"
36#include "networkd-link.h"
8e1ad1ea 37#include "networkd-lldp-tx.h"
23f53b99 38#include "networkd-manager.h"
dbf63196 39#include "networkd-mdb.h"
1e7a0e21 40#include "networkd-ndisc.h"
e4a71bf3 41#include "networkd-neighbor.h"
75156ccb 42#include "networkd-nexthop.h"
518cd6b5 43#include "networkd-sriov.h"
5e0534f1 44#include "networkd-sysctl.h"
7465dd22 45#include "networkd-radv.h"
bce67bbe 46#include "networkd-routing-policy-rule.h"
3b5a4fc6 47#include "networkd-state-file.h"
8d968fdd 48#include "networkd-wifi.h"
cf1d700d
TG		 49#include "set.h"
50#include "socket-util.h"
bf331d87 51#include "stat-util.h"
15a5e950 52#include "stdio-util.h"
8b43440b 53#include "string-table.h"
51517f9e 54#include "strv.h"
62e021a9 55#include "sysctl-util.h"
34658df2 56#include "tc.h"
e4de7287 57#include "tmpfile-util.h"
299ad32d 58#include "udev-util.h"
cf1d700d 59#include "util.h"
737f1405 60#include "vrf.h"
fc2f9534 61
3ca1fab7 62bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 63 assert(link);
64
78c958f8
TG		 65 if (link->flags & IFF_LOOPBACK)
66 return false;
67
68 if (!link->network)
69 return false;
70
500b96eb 71 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 72 return false;
73
98d20a17 74 if (STRPTR_IN_SET(link->kind,
75 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 76 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 77 return false;
78
f410d463
YW		 79 /* L3 or L3S mode do not support ARP. */
80 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
81 return false;
82
f2bfcdb9
YW		 83 if (link->network->bond)
84 return false;
85
3ca1fab7 86 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 87}
88
f8f2f880 89bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 90 assert(link);
91
fa709992
LP		 92 if (!socket_ipv6_is_supported())
93 return false;
94
d0d6a4cd
TG		 95 if (link->flags & IFF_LOOPBACK)
96 return false;
97
98 if (!link->network)
99 return false;
100
500b96eb 101 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 102 return false;
103
104 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 105 return false;
106
f2bfcdb9
YW		 107 if (link->network->bond)
108 return false;
109
e0ee46f2 110 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 111}
112
5e0534f1 113bool link_ipv6_enabled(Link *link) {
439689c6
SS		 114 assert(link);
115
116 if (!socket_ipv6_is_supported())
117 return false;
118
b102cdca 119 if (link->network->bond)
2b00a4e0
TY		 120 return false;
121
500b96eb 122 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 123 return false;
124
4cef7fe3 125 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 126 if (link_ipv6ll_enabled(link))
127 return true;
128
129 if (network_has_static_ipv6_configurations(link->network))
130 return true;
131
132 return false;
439689c6
SS		 133}
134
34bf3c00
YW		 135static bool link_is_enslaved(Link *link) {
136 if (link->flags & IFF_SLAVE)
137 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
138 return true;
139
34bf3c00
YW		 140 if (!link->network)
141 return false;
142
bb262ef0 143 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 144 return true;
145
bb262ef0
YW		 146 /* TODO: add conditions for other netdevs. */
147
34bf3c00
YW		 148 return false;
149}
150
45e11abf
YW		 151static void link_update_master_operstate(Link *link, NetDev *netdev) {
152 Link *master;
153
154 if (!netdev)
155 return;
156
7936917e
YW		 157 if (netdev->ifindex <= 0)
158 return;
159
45e11abf
YW		 160 if (link_get(link->manager, netdev->ifindex, &master) < 0)
161 return;
162
163 link_update_operstate(master, true);
164}
165
166void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 167 LinkOperationalState operstate;
1678fbb3
YW		 168 LinkCarrierState carrier_state;
169 LinkAddressState address_state;
35c5a9ca 170 _cleanup_strv_free_ char **p = NULL;
1678fbb3 171 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 172 bool changed = false;
1678fbb3 173 Address *address;
14153d1b 174
84de38c5
TG		 175 assert(link);
176
177 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 178 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 179 else if (link_has_carrier(link)) {
1678fbb3
YW		 180 if (link_is_enslaved(link))
181 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 182 else
1678fbb3 183 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 184 } else if (link->flags & IFF_UP)
1678fbb3 185 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 186 else
1678fbb3 187 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 188
1678fbb3 189 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 190 Link *slave;
191
90e74a66 192 SET_FOREACH(slave, link->slaves) {
959f65d3 193 link_update_operstate(slave, false);
84de38c5 194
1678fbb3
YW		 195 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
196 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 197 }
959f65d3 198 }
84de38c5 199
90e74a66 200 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 201 if (!address_is_ready(address))
202 continue;
84de38c5 203
1678fbb3
YW		 204 if (address->scope < scope)
205 scope = address->scope;
206 }
84de38c5 207
1678fbb3 208 /* for operstate we also take foreign addresses into account */
90e74a66 209 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 210 if (!address_is_ready(address))
211 continue;
212
213 if (address->scope < scope)
214 scope = address->scope;
215 }
216
217 if (scope < RT_SCOPE_SITE)
218 /* universally accessible addresses found */
219 address_state = LINK_ADDRESS_STATE_ROUTABLE;
220 else if (scope < RT_SCOPE_HOST)
221 /* only link or site local addresses found */
222 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 223 else
1678fbb3
YW		 224 /* no useful addresses found */
225 address_state = LINK_ADDRESS_STATE_OFF;
226
227 /* Mapping of address and carrier state vs operational state
228 * carrier state
229 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
230 * ------------------------------------------------------------------------------
231 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
232 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
233 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
234 */
84de38c5 235
1678fbb3
YW		 236 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
237 operstate = (LinkOperationalState) carrier_state;
238 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
239 operstate = LINK_OPERSTATE_ROUTABLE;
240 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
241 operstate = LINK_OPERSTATE_DEGRADED;
242 else
14153d1b
YW		 243 operstate = LINK_OPERSTATE_ENSLAVED;
244
35c5a9ca
YW		 245 if (link->carrier_state != carrier_state) {
246 link->carrier_state = carrier_state;
247 changed = true;
248 if (strv_extend(&p, "CarrierState") < 0)
249 log_oom();
250 }
959f65d3 251
35c5a9ca
YW		 252 if (link->address_state != address_state) {
253 link->address_state = address_state;
254 changed = true;
255 if (strv_extend(&p, "AddressState") < 0)
256 log_oom();
959f65d3
YW		 257 }
258
84de38c5
TG		 259 if (link->operstate != operstate) {
260 link->operstate = operstate;
35c5a9ca
YW		 261 changed = true;
262 if (strv_extend(&p, "OperationalState") < 0)
263 log_oom();
84de38c5 264 }
959f65d3 265
35c5a9ca
YW		 266 if (p)
267 link_send_changed_strv(link, p);
268 if (changed)
269 link_dirty(link);
270
45e11abf 271 if (also_update_master && link->network) {
c0267a59 272 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 273 link_update_master_operstate(link, link->network->bond);
274 link_update_master_operstate(link, link->network->bridge);
959f65d3 275 }
84de38c5
TG		 276}
277
51d18171
TG		 278#define FLAG_STRING(string, flag, old, new) \
279 (((old ^ new) & flag) \
280 ? ((old & flag) ? (" -" string) : (" +" string)) \
281 : "")
282
bb262ef0 283static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 284 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
285 uint8_t operstate;
286 int r;
287
288 assert(link);
289
290 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 291 if (r < 0)
292 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 293
1c4baffc 294 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 295 if (r < 0)
296 /* if we got a message without operstate, take it to mean
297 the state was unchanged */
298 operstate = link->kernel_operstate;
299
bb262ef0 300 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 301 return 0;
302
303 if (link->flags != flags) {
6a7a4e4d 304 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",
51d18171
TG		 305 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
306 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
307 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
308 FLAG_STRING("UP", IFF_UP, link->flags, flags),
309 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
310 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
311 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
312 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
313 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
314 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
315 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
316 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
317 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
318 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
319 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
320 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
321 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
322 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
323 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
324
325 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
326 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
327 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
328 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
329 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
330 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
331 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
332 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
333
334 /* link flags are currently at most 18 bits, let's align to
335 * printing 20 */
336 if (unknown_flags_added)
79008bdd 337 log_link_debug(link,
6a7a4e4d 338 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 339 unknown_flags_added);
340
341 if (unknown_flags_removed)
79008bdd 342 log_link_debug(link,
6a7a4e4d 343 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 344 unknown_flags_removed);
345 }
346
347 link->flags = flags;
348 link->kernel_operstate = operstate;
349
959f65d3 350 link_update_operstate(link, true);
51d18171
TG		 351
352 return 0;
353}
354
1c4baffc 355static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 356 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 357 const char *ifname, *kind = NULL;
b710e6b6 358 unsigned short iftype;
572b21d9
YW		 359 int r, ifindex;
360 uint16_t type;
f579559b 361
0c2f9b84 362 assert(manager);
505f8da7 363 assert(message);
f579559b
TG		 364 assert(ret);
365
6cad256d
TJ		 366 /* check for link kind */
367 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
368 if (r == 0) {
db2f8a2e 369 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 370 r = sd_netlink_message_exit_container(message);
371 if (r < 0)
372 return r;
373 }
374
1c4baffc 375 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 376 if (r < 0)
377 return r;
378 else if (type != RTM_NEWLINK)
379 return -EINVAL;
380
381 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
382 if (r < 0)
383 return r;
384 else if (ifindex <= 0)
385 return -EINVAL;
386
b710e6b6
LP		 387 r = sd_rtnl_message_link_get_type(message, &iftype);
388 if (r < 0)
389 return r;
390
1c4baffc 391 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 392 if (r < 0)
393 return r;
394
17f9c355 395 link = new(Link, 1);
f579559b
TG		 396 if (!link)
397 return -ENOMEM;
398
17f9c355
YW		 399 *link = (Link) {
400 .n_ref = 1,
401 .manager = manager,
402 .state = LINK_STATE_PENDING,
17f9c355
YW		 403 .ifindex = ifindex,
404 .iftype = iftype,
15761549
YW		 405
406 .n_dns = (unsigned) -1,
407 .dns_default_route = -1,
408 .llmnr = _RESOLVE_SUPPORT_INVALID,
409 .mdns = _RESOLVE_SUPPORT_INVALID,
410 .dnssec_mode = _DNSSEC_MODE_INVALID,
411 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 412 };
413
505f8da7
TG		 414 link->ifname = strdup(ifname);
415 if (!link->ifname)
416 return -ENOMEM;
f579559b 417
6cad256d
TJ		 418 if (kind) {
419 link->kind = strdup(kind);
420 if (!link->kind)
421 return -ENOMEM;
422 }
423
cbff7170
TJ		 424 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
425 if (r < 0)
426 log_link_debug_errno(link, r, "New device has no master, continuing without");
427
b8162cd2 428 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 429 if (r < 0)
b8162cd2 430 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 431
14b66dbc
TR		 432 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
433 if (r < 0)
434 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
435
c643bda5 436 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 437 if (r < 0)
438 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
439
c643bda5
YW		 440 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
441 if (r < 0)
442 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
443
572b21d9
YW		 444 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
445 if (r < 0 && r != -ENODATA)
446 return r;
447
34437b4f 448 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 449 return -ENOMEM;
fe8db0c5 450
34437b4f 451 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 452 return -ENOMEM;
453
34437b4f 454 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 455 return -ENOMEM;
456
967d72ed 457 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 458 if (r < 0)
459 return r;
460
bb262ef0 461 r = link_update_flags(link, message, false);
51d18171
TG		 462 if (r < 0)
463 return r;
464
1cc6c93a 465 *ret = TAKE_PTR(link);
f579559b
TG		 466
467 return 0;
468}
469
15761549
YW		 470void link_ntp_settings_clear(Link *link) {
471 link->ntp = strv_free(link->ntp);
472}
473
474void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 475 if (link->n_dns != (unsigned) -1)
476 for (unsigned i = 0; i < link->n_dns; i++)
477 in_addr_full_free(link->dns[i]);
15761549
YW		 478 link->dns = mfree(link->dns);
479 link->n_dns = (unsigned) -1;
480
481 link->search_domains = ordered_set_free_free(link->search_domains);
482 link->route_domains = ordered_set_free_free(link->route_domains);
483
484 link->dns_default_route = -1;
485 link->llmnr = _RESOLVE_SUPPORT_INVALID;
486 link->mdns = _RESOLVE_SUPPORT_INVALID;
487 link->dnssec_mode = _DNSSEC_MODE_INVALID;
488 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
489
490 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
491}
492
1a6bb31f
YW		 493static void link_free_engines(Link *link) {
494 if (!link)
495 return;
496
497 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
498 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
499 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 500 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 501
502 link->lldp = sd_lldp_unref(link->lldp);
1c494872 503 link_lldp_emit_stop(link);
1a6bb31f
YW		 504
505 ndisc_flush(link);
506
507 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
508 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 509 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 510 link->ndisc = sd_ndisc_unref(link->ndisc);
511 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 512
513 ipv4_dad_unref(link);
1a6bb31f
YW		 514}
515
8301aa0b 516static Link *link_free(Link *link) {
8301aa0b 517 assert(link);
f579559b 518
15761549
YW		 519 link_ntp_settings_clear(link);
520 link_dns_settings_clear(link);
521
8eec0b9d
YW		 522 link->routes = set_free(link->routes);
523 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 524 link->dhcp_routes = set_free(link->dhcp_routes);
525 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 526 link->dhcp6_routes = set_free(link->dhcp6_routes);
527 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
528 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
529 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 530 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 531
8eec0b9d
YW		 532 link->nexthops = set_free(link->nexthops);
533 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 534
8eec0b9d
YW		 535 link->neighbors = set_free(link->neighbors);
536 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 537
8eec0b9d
YW		 538 link->addresses = set_free(link->addresses);
539 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 540 link->pool_addresses = set_free(link->pool_addresses);
e5526518 541 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 542 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
543 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
544 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
545 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 546 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 547
1a6bb31f 548 link_free_engines(link);
68a8723c 549 free(link->lease_file);
49699bac
SS		 550 free(link->lldp_file);
551
c166a070 552 free(link->ifname);
572b21d9 553 strv_free(link->alternative_names);
ceac4078 554 free(link->kind);
8d968fdd 555 free(link->ssid);
c643bda5 556 free(link->driver);
6cad256d 557
db2f8a2e 558 (void) unlink(link->state_file);
fe8db0c5 559 free(link->state_file);
c166a070 560
51517f9e 561 sd_device_unref(link->sd_device);
b5db00e5 562
0d4ad91d 563 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 564 hashmap_free(link->bound_by_links);
565
5f707e12 566 set_free_with_destructor(link->slaves, link_unref);
033295c1 567
c9c908a6
YW		 568 network_unref(link->network);
569
8301aa0b 570 return mfree(link);
14b746f7
TG		 571}
572
8301aa0b 573DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 574
11a7f229
TG		 575int link_get(Manager *m, int ifindex, Link **ret) {
576 Link *link;
11a7f229
TG		 577
578 assert(m);
e856ed00 579 assert(ifindex > 0);
11a7f229
TG		 580 assert(ret);
581
ae06ab10 582 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 583 if (!link)
584 return -ENODEV;
585
586 *ret = link;
587
588 return 0;
589}
590
af9ba57a 591void link_set_state(Link *link, LinkState state) {
e331e246
TG		 592 assert(link);
593
594 if (link->state == state)
595 return;
596
0beb9542
YW		 597 log_link_debug(link, "State changed: %s -> %s",
598 link_state_to_string(link->state),
599 link_state_to_string(state));
600
e331e246
TG		 601 link->state = state;
602
603 link_send_changed(link, "AdministrativeState", NULL);
9092113d 604 link_dirty(link);
e331e246
TG		 605}
606
57bd6899
TG		 607static void link_enter_unmanaged(Link *link) {
608 assert(link);
609
e331e246 610 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 611}
612
2a99eed0 613int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 614 int r = 0, k;
615
616 assert(link);
617 assert(link->manager);
618 assert(link->manager->event);
619
80060352
ZJS		 620 bool keep_dhcp = may_keep_dhcp &&
621 link->network &&
622 (link->manager->restarting ||
623 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
624
84add3cd 625 if (!keep_dhcp) {
111bb8f9 626 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 627 if (k < 0)
36c7d709 628 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 629 }
630
84add3cd
YW		 631 k = sd_ipv4acd_stop(link->dhcp_acd);
632 if (k < 0)
633 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 634
2a99eed0
YW		 635 k = sd_dhcp_server_stop(link->dhcp_server);
636 if (k < 0)
637 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
638
9cc65242
YW		 639 k = sd_lldp_stop(link->lldp);
640 if (k < 0)
641 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
642
84add3cd
YW		 643 k = sd_ipv4ll_stop(link->ipv4ll);
644 if (k < 0)
645 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 646
490ccbd5 647 k = ipv4_dad_stop(link);
2488e4d9
YW		 648 if (k < 0)
649 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 650
84add3cd
YW		 651 k = sd_dhcp6_client_stop(link->dhcp6_client);
652 if (k < 0)
653 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 654
2ffd6d73
YW		 655 k = dhcp6_pd_remove(link);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 658
84add3cd
YW		 659 k = sd_ndisc_stop(link->ndisc);
660 if (k < 0)
661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 662
84add3cd
YW		 663 k = sd_radv_stop(link->radv);
664 if (k < 0)
665 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 666
7272b25e 667 link_lldp_emit_stop(link);
111bb8f9
TG		 668 return r;
669}
670
b22d8a00 671void link_enter_failed(Link *link) {
ef1ba606 672 assert(link);
f882c247 673
370e9930 674 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 675 return;
676
6a7a4e4d 677 log_link_warning(link, "Failed");
449f7554 678
e331e246 679 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 680
2a99eed0 681 (void) link_stop_engines(link, false);
f882c247
TG		 682}
683
7033af49
YW		 684static int link_join_netdevs_after_configured(Link *link) {
685 NetDev *netdev;
7033af49
YW		 686 int r;
687
90e74a66 688 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 689 if (netdev->ifindex > 0)
690 /* Assume already enslaved. */
691 continue;
692
693 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
694 continue;
695
696 log_struct(LOG_DEBUG,
697 LOG_LINK_INTERFACE(link),
698 LOG_NETDEV_INTERFACE(netdev),
699 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
700
701 r = netdev_join(netdev, link, NULL);
702 if (r < 0)
703 return log_struct_errno(LOG_WARNING, r,
704 LOG_LINK_INTERFACE(link),
705 LOG_NETDEV_INTERFACE(netdev),
706 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
707 }
708
709 return 0;
710}
711
e3a7b048 712static void link_enter_configured(Link *link) {
dd43110f
TG		 713 assert(link);
714 assert(link->network);
e3a7b048 715
289e6774 716 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 717 return;
dd43110f 718
e331e246 719 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 720
7033af49 721 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 722}
723
6accfd31
DA		 724void link_check_ready(Link *link) {
725 Address *a;
6accfd31
DA		 726
727 assert(link);
728
5f58af25
YW		 729 if (link->state == LINK_STATE_CONFIGURED)
730 return;
731
d19b9939
YW		 732 if (link->state != LINK_STATE_CONFIGURING)
733 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 734
735 if (!link->network)
736 return;
737
d19b9939
YW		 738 if (!link->addresses_configured)
739 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 740
d19b9939
YW		 741 if (!link->neighbors_configured)
742 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 743
90e74a66 744 SET_FOREACH(a, link->addresses)
39373cb9
YW		 745 if (!address_is_ready(a)) {
746 _cleanup_free_ char *str = NULL;
747
5380707a
YW		 748 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
749 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 750 }
6aa5773b 751
d19b9939
YW		 752 if (!link->static_routes_configured)
753 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 754
d19b9939
YW		 755 if (!link->static_nexthops_configured)
756 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 757
d19b9939
YW		 758 if (!link->routing_policy_rules_configured)
759 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 760
d19b9939
YW		 761 if (!link->tc_configured)
762 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 763
d19b9939
YW		 764 if (!link->sr_iov_configured)
765 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 766
d19b9939
YW		 767 if (!link->bridge_mdb_configured)
768 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 769
463797c1 770 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 771 bool has_ndisc_address = false;
772 NDiscAddress *n;
6accfd31 773
94876904
YW		 774 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
775 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 776
90e74a66 777 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 778 if (!n->marked) {
779 has_ndisc_address = true;
780 break;
781 }
782
0d0799da 783 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 784 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 785 !link->ipv4ll_address_configured)
786 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
787 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 788
0d0799da
YW		 789 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
790 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 791 if (!link->dhcp4_configured &&
792 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
793 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 794 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 795 !link->ipv4ll_address_configured)
796 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 797 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 798
0d0799da 799 log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 800 __func__,
801 yes_no(link->dhcp4_configured),
0d0799da 802 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 803 yes_no(link->dhcp6_address_configured),
804 yes_no(link->dhcp6_route_configured),
805 yes_no(link->dhcp6_pd_address_configured),
806 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 807 yes_no(link->ndisc_addresses_configured),
808 yes_no(link->ndisc_routes_configured));
39373cb9 809 }
463797c1 810 }
6accfd31 811
5f58af25 812 link_enter_configured(link);
6accfd31
DA		 813}
814
682c65b0 815static int link_set_static_configs(Link *link) {
f882c247
TG		 816 int r;
817
818 assert(link);
819 assert(link->network);
f5be5601 820 assert(link->state != _LINK_STATE_INVALID);
f882c247 821
2428613f 822 /* Reset all *_configured flags we are configuring. */
9b966cee 823 link->request_static_addresses = false;
2428613f 824 link->addresses_configured = false;
6aa5773b 825 link->addresses_ready = false;
2428613f
YW		 826 link->neighbors_configured = false;
827 link->static_routes_configured = false;
c16c7808 828 link->static_nexthops_configured = false;
2428613f
YW		 829 link->routing_policy_rules_configured = false;
830
f6bb7ac5
TJ		 831 r = link_set_bridge_fdb(link);
832 if (r < 0)
833 return r;
834
1f241589
YW		 835 r = link_set_bridge_mdb(link);
836 if (r < 0)
837 return r;
838
58f1fe9a 839 r = link_set_neighbors(link);
f3ef324d
YW		 840 if (r < 0)
841 return r;
e4a71bf3 842
682c65b0
YW		 843 r = link_set_addresses(link);
844 if (r < 0)
845 return r;
bd6379ec 846
fe2bc17c
YW		 847 r = link_set_address_labels(link);
848 if (r < 0)
849 return r;
f882c247 850
e5526518 851 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 852 r = dhcp4_server_configure(link);
853 if (r < 0)
854 return r;
d4cdbea5 855
f882c247
TG		 856 return 0;
857}
858
3a390124 859static int link_configure_continue(Link *link);
55dc8c4a 860
e16e4b3b
DS		 861static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
862 int r;
863
864 assert(link);
865
866 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
867 return 1;
868
869 r = sd_netlink_message_get_errno(m);
870 if (r < 0)
871 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
872 else
873 log_link_debug(link, "Setting MAC address done.");
874
875 return 1;
876}
877
878static int link_set_mac(Link *link) {
879 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
880 int r;
881
882 assert(link);
883 assert(link->network);
884 assert(link->manager);
885 assert(link->manager->rtnl);
886
887 if (!link->network->mac)
888 return 0;
889
890 log_link_debug(link, "Setting MAC address");
891
892 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
893 if (r < 0)
894 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
895
896 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
897 if (r < 0)
898 return log_link_error_errno(link, r, "Could not set MAC address: %m");
899
900 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
901 link_netlink_destroy_callback, link);
902 if (r < 0)
903 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
904
905 link_ref(link);
906
907 return 0;
908}
909
910static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
911 int r;
912
913 assert(link);
914
915 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
916 return 1;
917
918 r = sd_netlink_message_get_errno(m);
919 if (r < 0)
920 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
921 else
922 log_link_debug(link, "Setting nomaster done.");
923
924 return 1;
925}
926
927static int link_set_nomaster(Link *link) {
928 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
929 int r;
930
931 assert(link);
932 assert(link->network);
933 assert(link->manager);
934 assert(link->manager->rtnl);
935
936 /* set it free if not enslaved with networkd */
c0267a59 937 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 938 return 0;
939
940 log_link_debug(link, "Setting nomaster");
941
942 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
943 if (r < 0)
944 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
945
946 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
947 if (r < 0)
948 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
949
950 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
951 link_netlink_destroy_callback, link);
952 if (r < 0)
953 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
954
955 link_ref(link);
956
957 return 0;
958}
959
302a796f 960static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 961 int r;
962
963 assert(m);
964 assert(link);
965 assert(link->ifname);
966
55dc8c4a
YW		 967 link->setting_mtu = false;
968
5da8149f 969 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 970 return 1;
971
1c4baffc 972 r = sd_netlink_message_get_errno(m);
4ff296b0 973 if (r < 0)
5ecb131d 974 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 975 else
976 log_link_debug(link, "Setting MTU done.");
55dc8c4a 977
4ff296b0 978 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 979 r = link_configure_continue(link);
4ff296b0
YW		 980 if (r < 0)
981 link_enter_failed(link);
982 }
4f882b2a
TG		 983
984 return 1;
985}
986
933c70a0 987int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 988 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 989 int r;
990
991 assert(link);
992 assert(link->manager);
993 assert(link->manager->rtnl);
994
40288ece
YW		 995 if (mtu == 0 || link->setting_mtu)
996 return 0;
997
933c70a0 998 if (link->mtu == mtu)
ee493106
YW		 999 return 0;
1000
6a7a4e4d 1001 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1002
6a7a4e4d
LP		 1003 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1004 if (r < 0)
1005 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1006
44b598a1 1007 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1008 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1009 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1010
1011 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1012 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1013
72c2500b 1014 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1015 }
1016
1c4baffc 1017 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1018 if (r < 0)
1019 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1020
302a796f
YW		 1021 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1022 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1023 if (r < 0)
1024 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1025
ae941762 1026 link_ref(link);
1046bf9b 1027 link->setting_mtu = true;
b226d99b 1028
4f882b2a
TG		 1029 return 0;
1030}
1031
f6fcc1c2
YW		 1032static bool link_reduces_vlan_mtu(Link *link) {
1033 /* See netif_reduces_vlan_mtu() in kernel. */
1034 return streq_ptr(link->kind, "macsec");
1035}
1036
1037static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1038 uint32_t mtu = 0;
1039 NetDev *dev;
f6fcc1c2 1040
90e74a66 1041 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1042 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1043 /* See vlan_dev_change_mtu() in kernel. */
1044 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1045
1046 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1047 /* See macvlan_change_mtu() in kernel. */
1048 mtu = dev->mtu;
1049
1050 return mtu;
1051}
1052
1053static int link_configure_mtu(Link *link) {
1054 uint32_t mtu;
1055
1056 assert(link);
1057 assert(link->network);
1058
1059 if (link->network->mtu > 0)
1060 return link_set_mtu(link, link->network->mtu);
1061
1062 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1063 if (link->mtu >= mtu)
1064 return 0;
1065
1066 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1067 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1068 link->mtu, mtu);
1069
1070 return link_set_mtu(link, mtu);
1071}
1072
302a796f 1073static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1074 int r;
1075
1076 assert(m);
1077 assert(link);
1078 assert(link->ifname);
1079
1080 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1081 return 1;
1082
1083 r = sd_netlink_message_get_errno(m);
1084 if (r < 0)
5ecb131d 1085 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1086
1087 return 1;
1088}
1089
1090static int link_set_flags(Link *link) {
1091 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1092 unsigned ifi_change = 0;
1093 unsigned ifi_flags = 0;
1094 int r;
1095
1096 assert(link);
1097 assert(link->manager);
1098 assert(link->manager->rtnl);
1099
1100 if (link->flags & IFF_LOOPBACK)
1101 return 0;
1102
1103 if (!link->network)
1104 return 0;
1105
937e305e
SS		 1106 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1107 link->network->promiscuous < 0)
99d2baa2
SS		 1108 return 0;
1109
1110 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1111 if (r < 0)
1112 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1113
1114 if (link->network->arp >= 0) {
1115 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1116 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1117 }
1118
1119 if (link->network->multicast >= 0) {
1120 ifi_change |= IFF_MULTICAST;
1121 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1122 }
1123
866e6b7a
SS		 1124 if (link->network->allmulticast >= 0) {
1125 ifi_change |= IFF_ALLMULTI;
1126 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1127 }
1128
937e305e
SS		 1129 if (link->network->promiscuous >= 0) {
1130 ifi_change |= IFF_PROMISC;
1131 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1132 }
1133
99d2baa2
SS		 1134 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1135 if (r < 0)
1136 return log_link_error_errno(link, r, "Could not set link flags: %m");
1137
302a796f
YW		 1138 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1139 link_netlink_destroy_callback, link);
99d2baa2
SS		 1140 if (r < 0)
1141 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1142
1143 link_ref(link);
1144
1145 return 0;
1146}
1147
e7ab854c
TG		 1148static int link_acquire_ipv6_conf(Link *link) {
1149 int r;
1150
1151 assert(link);
1152
2ffd6d73 1153 if (link->ndisc) {
e7ab854c
TG		 1154 log_link_debug(link, "Discovering IPv6 routers");
1155
1e7a0e21 1156 r = sd_ndisc_start(link->ndisc);
63348d13 1157 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1158 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1159 }
1160
086b8853 1161 if (link->radv) {
7465dd22 1162 assert(link->radv);
94876904 1163 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1164
1165 log_link_debug(link, "Starting IPv6 Router Advertisements");
1166
fd3ef936
YW		 1167 r = radv_emit_dns(link);
1168 if (r < 0)
1169 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1170
7465dd22
PF		 1171 r = sd_radv_start(link->radv);
1172 if (r < 0 && r != -EBUSY)
1173 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1174 }
1175
838d39af
SS		 1176 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1177 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1178 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1 1179 assert(link->dhcp6_client);
94876904 1180 assert(in6_addr_is_link_local(&link->ipv6ll_address));
cd305af1 1181
838d39af 1182 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1183 if (r < 0 && r != -EBUSY)
1633c457 1184 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1185 else
1186 log_link_debug(link, "Acquiring DHCPv6 lease");
1187 }
1188
1633c457
YW		 1189 r = dhcp6_request_prefix_delegation(link);
1190 if (r < 0)
1191 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1192
e7ab854c
TG		 1193 return 0;
1194}
1195
6fc25497 1196static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1197 int r;
1198
1199 assert(link);
ff254138
TG		 1200 assert(link->manager);
1201 assert(link->manager->event);
1202
0107b769
ZJS		 1203 if (link->dhcp_client) {
1204 log_link_debug(link, "Acquiring DHCPv4 lease");
1205
1206 r = sd_dhcp_client_start(link->dhcp_client);
1207 if (r < 0)
1208 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1209
0b4b66cc 1210 } else if (link->ipv4ll) {
6a7a4e4d 1211 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1212
1213 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1214 if (r < 0)
1215 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1216 }
1217
6fc25497
SS		 1218 return 0;
1219}
1220
1221static int link_acquire_conf(Link *link) {
1222 int r;
1223
1224 assert(link);
1225
1226 r = link_acquire_ipv4_conf(link);
1227 if (r < 0)
1228 return r;
1229
94876904 1230 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1231 r = link_acquire_ipv6_conf(link);
1232 if (r < 0)
1233 return r;
1234 }
1235
2ffd6d73
YW		 1236 r = link_lldp_emit_start(link);
1237 if (r < 0)
1238 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1239
ff254138
TG		 1240 return 0;
1241}
1242
a61bb41c 1243bool link_has_carrier(Link *link) {
deb2e523
TG		 1244 /* see Documentation/networking/operstates.txt in the kernel sources */
1245
a61bb41c 1246 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1247 return true;
1248
a61bb41c 1249 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1250 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1251 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1252 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1253 return true;
1254
1255 return false;
1256}
1257
0e2fdb83
SS		 1258static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1259 int r;
1260
1261 assert(link);
1262
9524014e
DS		 1263 link->setting_genmode = false;
1264
0e2fdb83
SS		 1265 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1266 return 1;
1267
1268 r = sd_netlink_message_get_errno(m);
1269 if (r < 0)
5ecb131d 1270 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1271 else
1272 log_link_debug(link, "Setting address genmode done.");
1273
1274 if (link->state == LINK_STATE_INITIALIZED) {
1275 r = link_configure_continue(link);
1276 if (r < 0)
1277 link_enter_failed(link);
1278 }
0e2fdb83
SS		 1279
1280 return 1;
1281}
1282
1283static int link_configure_addrgen_mode(Link *link) {
1284 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1285 uint8_t ipv6ll_mode;
1286 int r;
1287
1288 assert(link);
1289 assert(link->network);
1290 assert(link->manager);
1291 assert(link->manager->rtnl);
1292
9524014e 1293 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1294 return 0;
1295
0e2fdb83
SS		 1296 log_link_debug(link, "Setting address genmode for link");
1297
1298 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1301
1302 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1305
1306 r = sd_netlink_message_open_container(req, AF_INET6);
1307 if (r < 0)
1308 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1309
1310 if (!link_ipv6ll_enabled(link))
1311 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1312 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1313 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1314 if (r < 0) {
1315 /* The file may not exist. And even if it exists, when stable_secret is unset,
1316 * reading the file fails with EIO. */
1317 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1318
1319 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1320 } else
1321 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1322 } else
6f6296b9 1323 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1324
1325 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1326 if (r < 0)
1327 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1328
1329 r = sd_netlink_message_close_container(req);
1330 if (r < 0)
1331 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1332
1333 r = sd_netlink_message_close_container(req);
1334 if (r < 0)
1335 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1336
1337 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1338 link_netlink_destroy_callback, link);
1339 if (r < 0)
1340 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1341
1342 link_ref(link);
9524014e 1343 link->setting_genmode = true;
0e2fdb83
SS		 1344
1345 return 0;
1346}
1347
302a796f 1348static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1349 int r;
1350
1746cf2a
TG		 1351 assert(link);
1352
5da8149f 1353 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1354 return 1;
1355
1c4baffc 1356 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1357 if (r < 0)
26d6b214 1358 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1359 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1360
f882c247
TG		 1361 return 1;
1362}
1363
1cc84f3b 1364static int link_up(Link *link) {
4afd3348 1365 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1366 int r;
1367
f882c247 1368 assert(link);
c106cc36 1369 assert(link->network);
f882c247
TG		 1370 assert(link->manager);
1371 assert(link->manager->rtnl);
1372
6a7a4e4d 1373 log_link_debug(link, "Bringing link up");
449f7554 1374
6a7a4e4d
LP		 1375 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1376 if (r < 0)
1377 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1378
5d4795f3 1379 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1380 if (r < 0)
1381 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1382
302a796f
YW		 1383 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1384 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1387
b226d99b
TG		 1388 link_ref(link);
1389
f882c247
TG		 1390 return 0;
1391}
1392
302a796f 1393static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1394 int r;
1395
1396 assert(link);
1397
1398 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1399 return 1;
1400
1c4baffc 1401 r = sd_netlink_message_get_errno(m);
0d4ad91d 1402 if (r < 0)
5ecb131d 1403 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1404
1405 return 1;
1406}
1407
8e54db83 1408int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1410 int r;
1411
1412 assert(link);
1413 assert(link->manager);
1414 assert(link->manager->rtnl);
1415
6a7a4e4d 1416 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1417
1418 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1419 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1422
1423 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1426
8e54db83
YW		 1427 r = netlink_call_async(link->manager->rtnl, NULL, req,
1428 callback ?: link_down_handler,
302a796f 1429 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1430 if (r < 0)
1431 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1432
1433 link_ref(link);
1434
1435 return 0;
1436}
1437
89fe6535
SS		 1438static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1439 int r;
1440
1441 assert(link);
1442
1443 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1444 return 1;
1445
1446 r = sd_netlink_message_get_errno(m);
1447 if (r < 0)
1448 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1449
1450 return 1;
1451}
1452
1453static int link_set_group(Link *link) {
1454 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1455 int r;
1456
1457 assert(link);
1458 assert(link->network);
1459 assert(link->manager);
1460 assert(link->manager->rtnl);
1461
1462 if (link->network->group <= 0)
1463 return 0;
1464
1465 log_link_debug(link, "Setting group");
1466
1467 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1470
1471 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1472 if (r < 0)
1473 return log_link_error_errno(link, r, "Could not set link group: %m");
1474
1475 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1476 link_netlink_destroy_callback, link);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1479
1480 link_ref(link);
1481
1482 return 0;
1483}
1484
0d4ad91d
AR		 1485static int link_handle_bound_to_list(Link *link) {
1486 Link *l;
0d4ad91d
AR		 1487 int r;
1488 bool required_up = false;
1489 bool link_is_up = false;
1490
1491 assert(link);
1492
1493 if (hashmap_isempty(link->bound_to_links))
1494 return 0;
1495
1496 if (link->flags & IFF_UP)
1497 link_is_up = true;
1498
90e74a66 1499 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1500 if (link_has_carrier(l)) {
1501 required_up = true;
1502 break;
1503 }
1504
1505 if (!required_up && link_is_up) {
8e54db83 1506 r = link_down(link, NULL);
0d4ad91d
AR		 1507 if (r < 0)
1508 return r;
1509 } else if (required_up && !link_is_up) {
1510 r = link_up(link);
1511 if (r < 0)
1512 return r;
1513 }
1514
1515 return 0;
1516}
1517
1518static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1519 Link *l;
1520 int r;
1521
1522 assert(link);
1523
1524 if (hashmap_isempty(link->bound_by_links))
1525 return 0;
1526
90e74a66 1527 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1528 r = link_handle_bound_to_list(l);
1529 if (r < 0)
1530 return r;
1531 }
1532
1533 return 0;
1534}
1535
1536static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1537 int r;
1538
1539 assert(link);
1540 assert(carrier);
1541
1542 if (link == carrier)
1543 return 0;
1544
1545 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1546 return 0;
1547
190b3b5c 1548 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1549 if (r < 0)
1550 return r;
1551
9092113d
YW		 1552 link_dirty(link);
1553
0d4ad91d
AR		 1554 return 0;
1555}
1556
1557static int link_new_bound_by_list(Link *link) {
1558 Manager *m;
1559 Link *carrier;
0d4ad91d 1560 int r;
0d4ad91d
AR		 1561
1562 assert(link);
1563 assert(link->manager);
1564
1565 m = link->manager;
1566
90e74a66 1567 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1568 if (!carrier->network)
1569 continue;
1570
1571 if (strv_isempty(carrier->network->bind_carrier))
1572 continue;
1573
191a3f16 1574 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1575 r = link_put_carrier(link, carrier, &link->bound_by_links);
1576 if (r < 0)
1577 return r;
0d4ad91d
AR		 1578 }
1579 }
1580
90e74a66 1581 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1582 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1583 if (r < 0)
1584 return r;
0d4ad91d
AR		 1585 }
1586
1587 return 0;
1588}
1589
1590static int link_new_bound_to_list(Link *link) {
1591 Manager *m;
1592 Link *carrier;
0d4ad91d 1593 int r;
0d4ad91d
AR		 1594
1595 assert(link);
1596 assert(link->manager);
1597
1598 if (!link->network)
1599 return 0;
1600
1601 if (strv_isempty(link->network->bind_carrier))
1602 return 0;
1603
1604 m = link->manager;
1605
90e74a66 1606 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1607 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1608 r = link_put_carrier(link, carrier, &link->bound_to_links);
1609 if (r < 0)
1610 return r;
0d4ad91d
AR		 1611 }
1612 }
1613
90e74a66 1614 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1615 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1616 if (r < 0)
1617 return r;
0d4ad91d
AR		 1618 }
1619
1620 return 0;
1621}
1622
1623static int link_new_carrier_maps(Link *link) {
1624 int r;
1625
1626 r = link_new_bound_by_list(link);
1627 if (r < 0)
1628 return r;
1629
1630 r = link_handle_bound_by_list(link);
1631 if (r < 0)
1632 return r;
1633
1634 r = link_new_bound_to_list(link);
1635 if (r < 0)
1636 return r;
1637
1638 r = link_handle_bound_to_list(link);
1639 if (r < 0)
1640 return r;
1641
1642 return 0;
1643}
1644
1645static void link_free_bound_to_list(Link *link) {
9092113d 1646 bool updated = false;
0d4ad91d 1647 Link *bound_to;
0d4ad91d 1648
9092113d
YW		 1649 assert(link);
1650
1651 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1652 updated = true;
0d4ad91d
AR		 1653
1654 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1655 link_dirty(bound_to);
0d4ad91d
AR		 1656 }
1657
9092113d
YW		 1658 if (updated)
1659 link_dirty(link);
1660
0d4ad91d
AR		 1661 return;
1662}
1663
1664static void link_free_bound_by_list(Link *link) {
9092113d 1665 bool updated = false;
0d4ad91d 1666 Link *bound_by;
0d4ad91d 1667
9092113d
YW		 1668 assert(link);
1669
1670 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1671 updated = true;
0d4ad91d
AR		 1672
1673 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1674 link_dirty(bound_by);
0d4ad91d
AR		 1675 link_handle_bound_to_list(bound_by);
1676 }
1677 }
1678
9092113d
YW		 1679 if (updated)
1680 link_dirty(link);
1681
0d4ad91d
AR		 1682 return;
1683}
1684
1685static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1686 assert(link);
1687
9092113d
YW		 1688 link_free_bound_to_list(link);
1689 link_free_bound_by_list(link);
0d4ad91d
AR		 1690
1691 return;
1692}
1693
5f707e12
YW		 1694static int link_append_to_master(Link *link, NetDev *netdev) {
1695 Link *master;
1696 int r;
1697
1698 assert(link);
1699 assert(netdev);
1700
1701 r = link_get(link->manager, netdev->ifindex, &master);
1702 if (r < 0)
1703 return r;
1704
de7fef4b 1705 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1706 if (r <= 0)
5f707e12
YW		 1707 return r;
1708
1709 link_ref(link);
1710 return 0;
1711}
1712
1713static void link_drop_from_master(Link *link, NetDev *netdev) {
1714 Link *master;
1715
1716 assert(link);
1717
1718 if (!link->manager || !netdev)
1719 return;
1720
1721 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1722 return;
1723
1724 link_unref(set_remove(master->slaves, link));
1725}
1726
1727static void link_detach_from_manager(Link *link) {
1728 if (!link || !link->manager)
1729 return;
1730
1731 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1732 link_clean(link);
1733
1734 /* The following must be called at last. */
1735 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1736 link_unref(link);
1737}
1738
3be9d62a 1739static void link_drop(Link *link) {
0d4ad91d
AR		 1740 if (!link || link->state == LINK_STATE_LINGER)
1741 return;
1742
1743 link_set_state(link, LINK_STATE_LINGER);
1744
1745 link_free_carrier_maps(link);
1746
5f707e12 1747 if (link->network) {
c0267a59 1748 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1749 link_drop_from_master(link, link->network->bridge);
1750 link_drop_from_master(link, link->network->bond);
1751 }
1752
6a7a4e4d 1753 log_link_debug(link, "Link removed");
0d4ad91d 1754
db2f8a2e 1755 (void) unlink(link->state_file);
c4397d94 1756 link_detach_from_manager(link);
0d4ad91d
AR		 1757}
1758
3f265037 1759static int link_joined(Link *link) {
f882c247
TG		 1760 int r;
1761
ef1ba606 1762 assert(link);
f5be5601 1763 assert(link->network);
dd3efc09 1764
61135582
DS		 1765 switch (link->network->activation_policy) {
1766 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1767 r = link_handle_bound_to_list(link);
1768 if (r < 0)
1769 return r;
61135582
DS		 1770 break;
1771 case ACTIVATION_POLICY_UP:
1772 if (link->activated)
1773 break;
1774 _fallthrough_;
1775 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7
TG		 1776 r = link_up(link);
1777 if (r < 0) {
1778 link_enter_failed(link);
1779 return r;
1780 }
61135582
DS		 1781 break;
1782 case ACTIVATION_POLICY_DOWN:
1783 if (link->activated)
1784 break;
1785 _fallthrough_;
1786 case ACTIVATION_POLICY_ALWAYS_DOWN:
1787 r = link_down(link, NULL);
1788 if (r < 0) {
1789 link_enter_failed(link);
1790 return r;
1791 }
1792 break;
1793 default:
1794 break;
ef1ba606 1795 }
61135582 1796 link->activated = true;
f882c247 1797
9ed794a3 1798 if (link->network->bridge) {
e1853b00 1799 r = link_set_bridge(link);
6a7a4e4d
LP		 1800 if (r < 0)
1801 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1802
1803 r = link_append_to_master(link, link->network->bridge);
1804 if (r < 0)
1805 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1806 }
1807
eb64b435 1808 if (link->network->bond) {
7fcee284 1809 r = link_set_bond(link);
eb64b435
SS		 1810 if (r < 0)
1811 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1812
45e11abf 1813 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1814 if (r < 0)
1815 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1816 }
1817
34d7f2c9
YW		 1818 r = link_set_bridge_vlan(link);
1819 if (r < 0)
1820 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1821
c1835a42
RM		 1822 /* Skip setting up addresses until it gets carrier,
1823 or it would try to set addresses twice,
1824 which is bad for non-idempotent steps. */
dad2d78e 1825 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1826 return 0;
1827
b425c3ae 1828 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1829
1830 r = link_acquire_conf(link);
1831 if (r < 0)
1832 return r;
1833
682c65b0 1834 return link_set_static_configs(link);
02b59d57
TG		 1835}
1836
302a796f 1837static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1838 int r;
1839
1746cf2a 1840 assert(link);
ef1ba606 1841 assert(link->network);
34bf3c00 1842 assert(link->enslaving > 0);
02b59d57 1843
313cefa1 1844 link->enslaving--;
52433f6b 1845
5da8149f 1846 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1847 return 1;
1848
1c4baffc 1849 r = sd_netlink_message_get_errno(m);
856f962c 1850 if (r < 0 && r != -EEXIST) {
5ecb131d 1851 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1852 link_enter_failed(link);
1853 return 1;
4ff296b0
YW		 1854 }
1855
1856 log_link_debug(link, "Joined netdev");
02b59d57 1857
34bf3c00 1858 if (link->enslaving == 0) {
4ff296b0
YW		 1859 r = link_joined(link);
1860 if (r < 0)
1861 link_enter_failed(link);
34bf3c00 1862 }
02b59d57
TG		 1863
1864 return 1;
1865}
1866
3f265037 1867static int link_enter_join_netdev(Link *link) {
6a0a2f86 1868 NetDev *netdev;
02b59d57
TG		 1869 int r;
1870
1871 assert(link);
1872 assert(link->network);
bd08ce56 1873 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1874
289e6774 1875 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1876
34bf3c00 1877 link->enslaving = 0;
02b59d57 1878
d9c67ea1 1879 if (link->network->bond) {
cbff7170
TJ		 1880 if (link->network->bond->state == NETDEV_STATE_READY &&
1881 link->network->bond->ifindex == link->master_ifindex)
1882 return link_joined(link);
1883
f2341e0a
LP		 1884 log_struct(LOG_DEBUG,
1885 LOG_LINK_INTERFACE(link),
1886 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1887 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1888
34bf3c00
YW		 1889 link->enslaving++;
1890
f2341e0a 1891 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1892 if (r < 0) {
f2341e0a
LP		 1893 log_struct_errno(LOG_WARNING, r,
1894 LOG_LINK_INTERFACE(link),
1895 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1896 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1897 link_enter_failed(link);
1898 return r;
c0267a59
AW		 1899 }
1900 }
1901
1902 if (link->network->batadv) {
1903 log_struct(LOG_DEBUG,
1904 LOG_LINK_INTERFACE(link),
1905 LOG_NETDEV_INTERFACE(link->network->batadv),
1906 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1907
1908 link->enslaving++;
1909
1910 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1911 if (r < 0) {
1912 log_struct_errno(LOG_WARNING, r,
1913 LOG_LINK_INTERFACE(link),
1914 LOG_NETDEV_INTERFACE(link->network->batadv),
1915 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1916 link_enter_failed(link);
1917 return r;
52433f6b 1918 }
0ad6148e
MO		 1919 }
1920
d9c67ea1 1921 if (link->network->bridge) {
f2341e0a
LP		 1922 log_struct(LOG_DEBUG,
1923 LOG_LINK_INTERFACE(link),
1924 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1925 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1926
34bf3c00
YW		 1927 link->enslaving++;
1928
f2341e0a 1929 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1930 if (r < 0) {
f2341e0a
LP		 1931 log_struct_errno(LOG_WARNING, r,
1932 LOG_LINK_INTERFACE(link),
1933 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1934 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1935 link_enter_failed(link);
1936 return r;
1937 }
52433f6b
TG		 1938 }
1939
6cb955c6
AR		 1940 if (link->network->vrf) {
1941 log_struct(LOG_DEBUG,
1942 LOG_LINK_INTERFACE(link),
1943 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1944 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1945
34bf3c00
YW		 1946 link->enslaving++;
1947
6cb955c6
AR		 1948 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1949 if (r < 0) {
1950 log_struct_errno(LOG_WARNING, r,
1951 LOG_LINK_INTERFACE(link),
1952 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1953 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1954 link_enter_failed(link);
1955 return r;
1956 }
6cb955c6
AR		 1957 }
1958
90e74a66 1959 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1960
2b6db913
YW		 1961 if (netdev->ifindex > 0)
1962 /* Assume already enslaved. */
a63e5daa 1963 continue;
a63e5daa 1964
7033af49
YW		 1965 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1966 continue;
1967
f2341e0a
LP		 1968 log_struct(LOG_DEBUG,
1969 LOG_LINK_INTERFACE(link),
1970 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1971 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1972
34bf3c00
YW		 1973 link->enslaving++;
1974
f2341e0a 1975 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1976 if (r < 0) {
f2341e0a
LP		 1977 log_struct_errno(LOG_WARNING, r,
1978 LOG_LINK_INTERFACE(link),
1979 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1980 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1981 link_enter_failed(link);
1982 return r;
1983 }
326cb406
SS		 1984 }
1985
34bf3c00
YW		 1986 if (link->enslaving == 0)
1987 return link_joined(link);
1988
ef1ba606
TG		 1989 return 0;
1990}
1991
5e5b137a 1992static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1993 int k, r;
1994
1995 assert(link);
1996 assert(link->manager);
5e5b137a 1997
f8f2f880 1998 r = link_drop_foreign_addresses(link);
5e5b137a 1999
0b81225e
YW		 2000 k = link_drop_foreign_neighbors(link);
2001 if (k < 0 && r >= 0)
2002 r = k;
2003
2004 k = link_drop_foreign_routes(link);
2005 if (k < 0 && r >= 0)
2006 r = k;
d1bdafd2 2007
25b82b6e
YW		 2008 k = link_drop_foreign_nexthops(link);
2009 if (k < 0 && r >= 0)
2010 r = k;
2011
0b81225e
YW		 2012 k = manager_drop_foreign_routing_policy_rules(link->manager);
2013 if (k < 0 && r >= 0)
2014 r = k;
2015
2016 return r;
5e5b137a
TG		 2017}
2018
3104883d 2019static int link_drop_config(Link *link) {
0b81225e
YW		 2020 int k, r;
2021
2022 assert(link);
2023 assert(link->manager);
3104883d 2024
d7fbb9f5 2025 r = link_drop_addresses(link);
3104883d 2026
0b81225e
YW		 2027 k = link_drop_neighbors(link);
2028 if (k < 0 && r >= 0)
2029 r = k;
d1bdafd2 2030
0b81225e
YW		 2031 k = link_drop_routes(link);
2032 if (k < 0 && r >= 0)
2033 r = k;
2034
25b82b6e
YW		 2035 k = link_drop_nexthops(link);
2036 if (k < 0 && r >= 0)
2037 r = k;
2038
0b81225e
YW		 2039 k = manager_drop_routing_policy_rules(link->manager, link);
2040 if (k < 0 && r >= 0)
2041 r = k;
3104883d 2042
c69305ff
LP		 2043 ndisc_flush(link);
2044
0b81225e 2045 return r;
3104883d
SS		 2046}
2047
256c75fd 2048int link_configure(Link *link) {
4ecdcb07
YW		 2049 int r;
2050
ef1ba606 2051 assert(link);
b22d8a00 2052 assert(link->network);
bd08ce56 2053 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2054
34658df2 2055 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2056 if (r < 0)
2057 return r;
2058
518cd6b5
SS		 2059 r = link_configure_sr_iov(link);
2060 if (r < 0)
2061 return r;
2062
500b96eb 2063 if (link->iftype == ARPHRD_CAN)
93ea7750 2064 return link_configure_can(link);
92c918b0 2065
5e0534f1 2066 r = link_set_sysctl(link);
b69c3180
SS		 2067 if (r < 0)
2068 return r;
8749cbcd 2069
e16e4b3b
DS		 2070 r = link_set_mac(link);
2071 if (r < 0)
2072 return r;
2073
2074 r = link_set_nomaster(link);
2075 if (r < 0)
2076 return r;
2077
99d2baa2
SS		 2078 r = link_set_flags(link);
2079 if (r < 0)
2080 return r;
2081
89fe6535
SS		 2082 r = link_set_group(link);
2083 if (r < 0)
2084 return r;
2085
2ffd6d73
YW		 2086 r = ipv4ll_configure(link);
2087 if (r < 0)
2088 return r;
64b21ece 2089
2ffd6d73
YW		 2090 r = dhcp4_configure(link);
2091 if (r < 0)
2092 return r;
eb34d4af 2093
2ffd6d73
YW		 2094 r = dhcp6_configure(link);
2095 if (r < 0)
2096 return r;
f5a8c43f 2097
2ffd6d73
YW		 2098 r = ndisc_configure(link);
2099 if (r < 0)
2100 return r;
4138fb2c 2101
086b8853
YW		 2102 r = radv_configure(link);
2103 if (r < 0)
2104 return r;
7465dd22 2105
2ffd6d73
YW		 2106 r = link_lldp_rx_configure(link);
2107 if (r < 0)
2108 return r;
ce43e484 2109
f6fcc1c2 2110 r = link_configure_mtu(link);
40288ece
YW		 2111 if (r < 0)
2112 return r;
44b598a1 2113
9f6e82e6
YW		 2114 r = link_configure_addrgen_mode(link);
2115 if (r < 0)
2116 return r;
0e2fdb83 2117
3a390124
DS		 2118 return link_configure_continue(link);
2119}
2120
2121/* The configuration continues in this separate function, instead of
2122 * including this in the above link_configure() function, for two
2123 * reasons:
2124 * 1) some devices reset the link when the mtu is set, which caused
2125 * an infinite loop here in networkd; see:
2126 * https://github.com/systemd/systemd/issues/6593
2127 * https://github.com/systemd/systemd/issues/9831
2128 * 2) if ipv6ll is disabled, then bringing the interface up must be
2129 * delayed until after we get confirmation from the kernel that
2130 * the addr_gen_mode parameter has been set (via netlink), see:
2131 * https://github.com/systemd/systemd/issues/13882
2132 */
2133static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2134 int r;
2135
2136 assert(link);
2137 assert(link->network);
bd08ce56 2138 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2139
9524014e 2140 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2141 return 0;
2142
4c649652
DS		 2143 /* Drop foreign config, but ignore loopback or critical devices.
2144 * We do not want to remove loopback address or addresses used for root NFS. */
2145 if (!(link->flags & IFF_LOOPBACK) &&
2146 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2147 r = link_drop_foreign_config(link);
2148 if (r < 0)
2149 return r;
2150 }
2151
d236718c
DS		 2152 /* The kernel resets ipv6 mtu after changing device mtu;
2153 * we must set this here, after we've set device mtu */
2154 r = link_set_ipv6_mtu(link);
2155 if (r < 0)
5e0534f1 2156 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2157
3f265037 2158 return link_enter_join_netdev(link);
505f8da7
TG		 2159}
2160
572b21d9 2161static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2162 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2163 Network *network;
2164 int r;
2165
8bceafa7 2166 assert(m);
572b21d9 2167
8bceafa7
YW		 2168 r = sd_netlink_message_get_errno(m);
2169 if (r < 0)
2170 return r;
572b21d9 2171
8bceafa7
YW		 2172 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2173 if (r < 0 && r != -ENODATA)
2174 return r;
572b21d9 2175
8bceafa7 2176 strv_free_and_replace(link->alternative_names, s);
572b21d9 2177
c643bda5
YW		 2178 r = network_get(link->manager, link->iftype, link->sd_device,
2179 link->ifname, link->alternative_names, link->driver,
b8162cd2 2180 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2181 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2182 if (r == -ENOENT) {
2183 link_enter_unmanaged(link);
2184 return 0;
2185 } else if (r == 0 && network->unmanaged) {
2186 link_enter_unmanaged(link);
2187 return 0;
2188 } else if (r < 0)
2189 return r;
2190
99b8517c 2191 if (link->network == network && !force)
ad932b15
YW		 2192 return 0;
2193
2194 log_link_info(link, "Re-configuring with %s", network->filename);
2195
2196 /* Dropping old .network file */
2a99eed0 2197 r = link_stop_engines(link, false);
572b21d9 2198 if (r < 0)
ad932b15 2199 return r;
ad932b15 2200
ad932b15
YW		 2201 r = link_drop_config(link);
2202 if (r < 0)
2203 return r;
2204
2c7b826d 2205 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2206 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2207 r = link_drop_foreign_config(link);
2208 if (r < 0)
2209 return r;
2210 }
2211
2212 link_free_carrier_maps(link);
2213 link_free_engines(link);
2214 link->network = network_unref(link->network);
59c31eba 2215 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2216
2217 /* Then, apply new .network file */
9092113d
YW		 2218 link->network = network_ref(network);
2219 link_dirty(link);
ad932b15
YW		 2220
2221 r = link_new_carrier_maps(link);
2222 if (r < 0)
2223 return r;
2224
2225 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2226 link->activated = false;
ad932b15
YW		 2227
2228 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2229 * link_configure() is called later asynchronously. */
2230 r = link_configure_duid(link);
2231 if (r <= 0)
2232 return r;
2233
2234 r = link_configure(link);
2235 if (r < 0)
2236 return r;
2237
2238 return 0;
2239}
2240
572b21d9
YW		 2241static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2242 int r;
2243
2244 r = link_reconfigure_internal(link, m, false);
2245 if (r < 0)
2246 link_enter_failed(link);
2247
2248 return 1;
2249}
2250
2251static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2252 int r;
2253
2254 r = link_reconfigure_internal(link, m, true);
2255 if (r < 0)
2256 link_enter_failed(link);
2257
2258 return 1;
2259}
2260
2261int link_reconfigure(Link *link, bool force) {
2262 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2263 int r;
2264
8bceafa7 2265 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2266 * the function from being called multiple times simultaneously, refuse to reconfigure the
2267 * interface in these cases. */
8bceafa7 2268 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2269 return 0; /* 0 means no-op. */
2c0d7ed3 2270
572b21d9
YW		 2271 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2272 link->ifindex);
2273 if (r < 0)
2274 return r;
2275
2276 r = netlink_call_async(link->manager->rtnl, NULL, req,
2277 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2278 link_netlink_destroy_callback, link);
2279 if (r < 0)
2280 return r;
2281
2282 link_ref(link);
2283
8bceafa7 2284 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2285}
2286
e6bf7774 2287static int link_initialized_and_synced(Link *link) {
505f8da7 2288 Network *network;
505f8da7
TG		 2289 int r;
2290
2291 assert(link);
2292 assert(link->ifname);
2293 assert(link->manager);
2294
bd08ce56
YW		 2295 /* We may get called either from the asynchronous netlink callback,
2296 * or directly for link_add() if running in a container. See link_add(). */
2297 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2298 return 0;
505f8da7 2299
6a7a4e4d 2300 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2301 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2302
0d4ad91d
AR		 2303 r = link_new_bound_by_list(link);
2304 if (r < 0)
2305 return r;
2306
2307 r = link_handle_bound_by_list(link);
2308 if (r < 0)
2309 return r;
2310
c4a03a56 2311 if (!link->network) {
0894cfe4 2312 r = wifi_get_info(link);
8d968fdd
YW		 2313 if (r < 0)
2314 return r;
2315
c643bda5
YW		 2316 r = network_get(link->manager, link->iftype, link->sd_device,
2317 link->ifname, link->alternative_names, link->driver,
b8162cd2 2318 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2319 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2320 if (r == -ENOENT) {
2321 link_enter_unmanaged(link);
4232cf04 2322 return 0;
a09dc546
DM		 2323 } else if (r == 0 && network->unmanaged) {
2324 link_enter_unmanaged(link);
2325 return 0;
c4a03a56
TG		 2326 } else if (r < 0)
2327 return r;
505f8da7 2328
c4a03a56
TG		 2329 if (link->flags & IFF_LOOPBACK) {
2330 if (network->link_local != ADDRESS_FAMILY_NO)
2331 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2332
c4a03a56
TG		 2333 if (network->dhcp != ADDRESS_FAMILY_NO)
2334 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2335
c4a03a56
TG		 2336 if (network->dhcp_server)
2337 log_link_debug(link, "Ignoring DHCP server for loopback link");
2338 }
bd2efe92 2339
9092113d
YW		 2340 link->network = network_ref(network);
2341 link_dirty(link);
c4a03a56 2342 }
505f8da7 2343
0d4ad91d
AR		 2344 r = link_new_bound_to_list(link);
2345 if (r < 0)
2346 return r;
2347
27dfc982
YW		 2348 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2349 * link_configure() is called later asynchronously. */
2350 r = link_configure_duid(link);
2351 if (r <= 0)
2352 return r;
2353
a748b692
TG		 2354 r = link_configure(link);
2355 if (r < 0)
2356 return r;
2357
4232cf04 2358 return 0;
505f8da7
TG		 2359}
2360
302a796f 2361static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2362 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2363 int r;
2364
572b21d9
YW		 2365 r = sd_netlink_message_get_errno(m);
2366 if (r < 0) {
40681e5c 2367 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2368 link_enter_failed(link);
2369 return 0;
2370 }
2371
2372 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2373 if (r < 0 && r != -ENODATA) {
2374 link_enter_failed(link);
2375 return 0;
2376 }
2377
2378 strv_free_and_replace(link->alternative_names, s);
2379
4ff296b0
YW		 2380 r = link_initialized_and_synced(link);
2381 if (r < 0)
2382 link_enter_failed(link);
e6bf7774
YW		 2383 return 1;
2384}
2385
3be9d62a 2386static int link_initialized(Link *link, sd_device *device) {
4afd3348 2387 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2388 int r;
2389
2390 assert(link);
2391 assert(link->manager);
2392 assert(link->manager->rtnl);
2393 assert(device);
2394
8434fd5c 2395 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2396 return 0;
2397
51517f9e 2398 if (link->sd_device)
679b3605
TG		 2399 return 0;
2400
79008bdd 2401 log_link_debug(link, "udev initialized link");
bd08ce56 2402 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2403
51517f9e 2404 link->sd_device = sd_device_ref(device);
4f561e8e 2405
3c9b8860
TG		 2406 /* udev has initialized the link, but we don't know if we have yet
2407 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2408 * when it returns we know that the pending NEWLINKs have already been
2409 * processed and that we are up-to-date */
4f561e8e 2410
3c9b8860
TG		 2411 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2412 link->ifindex);
4f561e8e
TG		 2413 if (r < 0)
2414 return r;
2415
302a796f
YW		 2416 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2417 link_netlink_destroy_callback, link);
4f561e8e
TG		 2418 if (r < 0)
2419 return r;
2420
5da8149f
TG		 2421 link_ref(link);
2422
4f561e8e
TG		 2423 return 0;
2424}
2425
3be9d62a 2426static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2427 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2428 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2429 Link *link;
5a937ea2 2430 int r;
505f8da7
TG		 2431
2432 assert(m);
fbbeb65a 2433 assert(m->rtnl);
505f8da7
TG		 2434 assert(message);
2435 assert(ret);
2436
2437 r = link_new(m, message, ret);
2438 if (r < 0)
2439 return r;
2440
2441 link = *ret;
2442
6a7a4e4d 2443 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2444
bf331d87
YW		 2445 if (path_is_read_only_fs("/sys") <= 0) {
2446 /* udev should be around */
ae06ab10 2447 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2448 r = sd_device_new_from_device_id(&device, ifindex_str);
2449 if (r < 0) {
4d59e14f
YW		 2450 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2451 return 0;
5c416fc4 2452 }
505f8da7 2453
5a937ea2 2454 r = sd_device_get_is_initialized(device);
51517f9e 2455 if (r < 0) {
bf331d87 2456 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2457 goto failed;
2458 }
5a937ea2 2459 if (r == 0) {
505f8da7 2460 /* not yet ready */
79008bdd 2461 log_link_debug(link, "link pending udev initialization...");
505f8da7 2462 return 0;
3c4cb064 2463 }
505f8da7 2464
299ad32d
YW		 2465 r = device_is_renaming(device);
2466 if (r < 0) {
bf331d87 2467 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2468 goto failed;
2469 }
2470 if (r > 0) {
bf331d87 2471 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2472 return 0;
2473 }
2474
4f561e8e
TG		 2475 r = link_initialized(link, device);
2476 if (r < 0)
5c416fc4 2477 goto failed;
4f561e8e 2478 } else {
e6bf7774 2479 r = link_initialized_and_synced(link);
4f561e8e 2480 if (r < 0)
5c416fc4 2481 goto failed;
4f561e8e 2482 }
505f8da7 2483
a748b692 2484 return 0;
5c416fc4
TG		 2485failed:
2486 link_enter_failed(link);
2487 return r;
a748b692
TG		 2488}
2489
c601ebf7 2490int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2491 int r;
2492
2493 assert(link);
2494
2495 log_link_info(link, "Gained IPv6LL");
2496
c601ebf7 2497 link->ipv6ll_address = *address;
e7ab854c
TG		 2498 link_check_ready(link);
2499
b9ea3d2e 2500 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2501 r = link_acquire_ipv6_conf(link);
2502 if (r < 0) {
2503 link_enter_failed(link);
2504 return r;
2505 }
2506 }
2507
2508 return 0;
2509}
2510
3be9d62a
YW		 2511int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2512 sd_device_action_t action;
2513 Manager *m = userdata;
2514 Link *link = NULL;
2515 int r, ifindex;
2516
2517 assert(m);
2518 assert(device);
2519
2520 r = sd_device_get_action(device, &action);
2521 if (r < 0) {
2522 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2523 return 0;
2524 }
2525
2526 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2527 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2528 * still exists — and we are interested in that. */
2529 if (action == SD_DEVICE_REMOVE)
2530 return 0;
2531
2532 r = sd_device_get_ifindex(device, &ifindex);
2533 if (r < 0) {
2534 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2535 device_action_to_string(action));
2536 return 0;
2537 }
2538
2539 r = device_is_renaming(device);
2540 if (r < 0) {
2541 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2542 device_action_to_string(action));
2543 return 0;
2544 }
2545 if (r > 0) {
2546 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2547 return 0;
2548 }
2549
2550 r = link_get(m, ifindex, &link);
2551 if (r < 0) {
2552 if (r != -ENODEV)
2553 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2554 return 0;
2555 }
2556
2557 (void) link_initialized(link, device);
2558
2559 return 0;
2560}
2561
9c0a72f9
TG		 2562static int link_carrier_gained(Link *link) {
2563 int r;
2564
2565 assert(link);
2566
0894cfe4 2567 r = wifi_get_info(link);
8d968fdd
YW		 2568 if (r < 0)
2569 return r;
2570 if (r > 0) {
8bceafa7 2571 r = link_reconfigure(link, false);
572b21d9
YW		 2572 if (r < 0) {
2573 link_enter_failed(link);
8d968fdd 2574 return r;
572b21d9 2575 }
8d968fdd
YW		 2576 }
2577
b9ea3d2e 2578 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2579 r = link_acquire_conf(link);
2580 if (r < 0) {
2581 link_enter_failed(link);
2582 return r;
2583 }
6fc25497 2584
b425c3ae 2585 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2586 r = link_set_static_configs(link);
6fc25497
SS		 2587 if (r < 0)
2588 return r;
9c0a72f9
TG		 2589 }
2590
0d4ad91d
AR		 2591 r = link_handle_bound_by_list(link);
2592 if (r < 0)
2593 return r;
2594
1f241589
YW		 2595 if (!link->bridge_mdb_configured) {
2596 r = link_set_bridge_mdb(link);
2597 if (r < 0)
2598 return r;
2599 }
2600
2601 if (streq_ptr(link->kind, "bridge")) {
2602 Link *slave;
2603
2604 SET_FOREACH(slave, link->slaves) {
2605 if (slave->bridge_mdb_configured)
2606 continue;
2607
2608 r = link_set_bridge_mdb(slave);
2609 if (r < 0)
2610 link_enter_failed(slave);
2611 }
2612 }
3db468ea 2613
9c0a72f9
TG		 2614 return 0;
2615}
2616
2617static int link_carrier_lost(Link *link) {
2618 int r;
2619
2620 assert(link);
2621
25e992ba 2622 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2623 return 0;
2624
fbdb6605 2625 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2626 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2627 * configuration and stop the clients as well. */
97e7fb39
SS		 2628 if (link->setting_mtu)
2629 return 0;
2630
2a99eed0 2631 r = link_stop_engines(link, false);
9c0a72f9
TG		 2632 if (r < 0) {
2633 link_enter_failed(link);
2634 return r;
2635 }
2636
3104883d
SS		 2637 r = link_drop_config(link);
2638 if (r < 0)
2639 return r;
2640
2c7b826d 2641 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2642 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2643 r = link_drop_foreign_config(link);
2644 if (r < 0)
2645 return r;
2646 }
3104883d 2647
0d4ad91d
AR		 2648 r = link_handle_bound_by_list(link);
2649 if (r < 0)
2650 return r;
2651
9c0a72f9
TG		 2652 return 0;
2653}
2654
2655int link_carrier_reset(Link *link) {
2656 int r;
2657
2658 assert(link);
2659
2660 if (link_has_carrier(link)) {
2661 r = link_carrier_lost(link);
2662 if (r < 0)
2663 return r;
2664
2665 r = link_carrier_gained(link);
2666 if (r < 0)
2667 return r;
2668
6a7a4e4d 2669 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2670 }
2671
2672 return 0;
2673}
2674
d236718c
DS		 2675static int link_admin_state_up(Link *link) {
2676 int r;
2677
61135582
DS		 2678 assert(link);
2679
3be9d62a
YW		 2680 /* This is called every time an interface admin state changes to up;
2681 * specifically, when IFF_UP flag changes from unset to set. */
2682
61135582
DS		 2683 if (!link->network)
2684 return 0;
2685
2686 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2687 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2688 return link_down(link, NULL);
2689 }
2690
d236718c
DS		 2691 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2692 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2693 * ipv6_mtu_set prevents this from trying to set it too early before
2694 * the link->network has been setup; we only need to reset it
2695 * here if we've already set it during normal initialization. */
2696 if (link->ipv6_mtu_set) {
2697 r = link_set_ipv6_mtu(link);
2698 if (r < 0)
2699 return r;
2700 }
2701
2702 return 0;
2703}
2704
61135582 2705static int link_admin_state_down(Link *link) {
61135582
DS		 2706 assert(link);
2707
2708 if (!link->network)
2709 return 0;
2710
2711 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
2712 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2713 return link_up(link);
2714 }
2715
2716 return 0;
2717}
2718
3be9d62a 2719static int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2720 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2721 hw_addr_data hw_addr;
ca4e095a 2722 const char *ifname;
afe7fd56 2723 uint32_t mtu;
d236718c 2724 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2725 int old_master, r;
22936833 2726
dd3efc09 2727 assert(link);
b8941f74 2728 assert(link->ifname);
22936833
TG		 2729 assert(m);
2730
7619683b 2731 if (link->state == LINK_STATE_LINGER) {
5238e957 2732 log_link_info(link, "Link re-added");
289e6774 2733 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2734
2735 r = link_new_carrier_maps(link);
2736 if (r < 0)
2737 return r;
7619683b
TG		 2738 }
2739
1c4baffc 2740 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2741 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2742 Manager *manager = link->manager;
b8941f74 2743
30de2b89 2744 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2745
30de2b89
YW		 2746 link_drop(link);
2747 r = link_add(manager, m, &link);
2748 if (r < 0)
2749 return r;
b8941f74
TG		 2750 }
2751
572b21d9
YW		 2752 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2753 if (r >= 0)
2754 strv_free_and_replace(link->alternative_names, s);
2755
1c4baffc 2756 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2757 if (r >= 0 && mtu > 0) {
2758 link->mtu = mtu;
4e964aa0 2759 if (link->original_mtu == 0) {
afe7fd56 2760 link->original_mtu = mtu;
6a7a4e4d 2761 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2762 }
2763
2764 if (link->dhcp_client) {
3c9b8860
TG		 2765 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2766 link->mtu);
fc95c359
YW		 2767 if (r < 0)
2768 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2769 }
7465dd22
PF		 2770
2771 if (link->radv) {
2772 r = sd_radv_set_mtu(link->radv, link->mtu);
2773 if (r < 0)
2774 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2775 }
9842de0d 2776 }
69629de9 2777
e9189a1f
TG		 2778 /* The kernel may broadcast NEWLINK messages without the MAC address
2779 set, simply ignore them. */
b8162cd2
TR		 2780 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2781 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2782 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2783
b8162cd2 2784 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2785
b8162cd2 2786 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2787
a3adb4a6
YW		 2788 r = ipv4ll_update_mac(link);
2789 if (r < 0)
2790 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2791
d947f7f9
YW		 2792 r = dhcp4_update_mac(link);
2793 if (r < 0)
2794 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2795
eebba6dc
YW		 2796 r = dhcp6_update_mac(link);
2797 if (r < 0)
2798 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2799
d0c4275c 2800 r = radv_update_mac(link);
be9363cc
YW		 2801 if (r < 0)
2802 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2803
2804 if (link->ndisc) {
b8162cd2 2805 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2806 if (r < 0)
2807 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2808 }
d93d655c
YW		 2809
2810 r = ipv4_dad_update_mac(link);
2811 if (r < 0)
2812 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2813 }
2814
bb262ef0
YW		 2815 old_master = link->master_ifindex;
2816 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2817
d236718c 2818 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2819 had_carrier = link_has_carrier(link);
2820
bb262ef0 2821 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2822 if (r < 0)
2823 return r;
2824
d236718c
DS		 2825 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2826 log_link_info(link, "Link UP");
2827
2828 r = link_admin_state_up(link);
2829 if (r < 0)
2830 return r;
61135582 2831 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2832 log_link_info(link, "Link DOWN");
2833
61135582
DS		 2834 r = link_admin_state_down(link);
2835 if (r < 0)
2836 return r;
2837 }
2838
273eec24
LP		 2839 r = link_update_lldp(link);
2840 if (r < 0)
2841 return r;
2842
a61bb41c
TG		 2843 carrier_gained = !had_carrier && link_has_carrier(link);
2844 carrier_lost = had_carrier && !link_has_carrier(link);
2845
2846 if (carrier_gained) {
6a7a4e4d 2847 log_link_info(link, "Gained carrier");
a61bb41c 2848
9c0a72f9
TG		 2849 r = link_carrier_gained(link);
2850 if (r < 0)
2851 return r;
a61bb41c 2852 } else if (carrier_lost) {
6a7a4e4d 2853 log_link_info(link, "Lost carrier");
a61bb41c 2854
9c0a72f9
TG		 2855 r = link_carrier_lost(link);
2856 if (r < 0)
a61bb41c 2857 return r;
a61bb41c
TG		 2858 }
2859
2860 return 0;
dd3efc09 2861}
fe8db0c5 2862
3be9d62a
YW		 2863int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2864 Link *link = NULL;
2865 NetDev *netdev = NULL;
2866 uint16_t type;
2867 const char *name;
2868 int r, ifindex;
2869
2870 assert(rtnl);
2871 assert(message);
2872 assert(m);
2873
2874 if (sd_netlink_message_is_error(message)) {
2875 r = sd_netlink_message_get_errno(message);
2876 if (r < 0)
2877 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2878
2879 return 0;
2880 }
2881
2882 r = sd_netlink_message_get_type(message, &type);
2883 if (r < 0) {
2884 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2885 return 0;
2886 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2887 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2888 return 0;
2889 }
2890
2891 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2892 if (r < 0) {
2893 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2894 return 0;
2895 } else if (ifindex <= 0) {
2896 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2897 return 0;
2898 }
2899
2900 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2901 if (r < 0) {
2902 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2903 return 0;
2904 }
2905
2906 (void) link_get(m, ifindex, &link);
2907 (void) netdev_get(m, name, &netdev);
2908
2909 switch (type) {
2910 case RTM_NEWLINK:
2911 if (!link) {
2912 /* link is new, so add it */
2913 r = link_add(m, message, &link);
2914 if (r < 0) {
2915 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2916 return 0;
2917 }
2918 }
2919
2920 if (netdev) {
2921 /* netdev exists, so make sure the ifindex matches */
2922 r = netdev_set_ifindex(netdev, message);
2923 if (r < 0) {
2924 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2925 return 0;
2926 }
2927 }
2928
2929 r = link_update(link, message);
2930 if (r < 0) {
2931 log_warning_errno(r, "Could not process link message, ignoring: %m");
2932 return 0;
2933 }
2934
2935 break;
2936
2937 case RTM_DELLINK:
2938 link_drop(link);
2939 netdev_drop(netdev);
2940
2941 break;
2942
2943 default:
2944 assert_not_reached("Received link message with invalid RTNL message type.");
2945 }
2946
2947 return 1;
2948}
2949
fe8db0c5 2950static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2951 [LINK_STATE_PENDING] = "pending",
bd08ce56 2952 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2953 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2954 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2955 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2956 [LINK_STATE_FAILED] = "failed",
370e9930 2957 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2958};
2959
2960DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 2961
2962int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
2963 const char *err_msg = NULL;
2964
2965 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 2966 return log_link_full_errno(link, level, err,
2967 "%s: %s%s%s%m",
2968 msg,
2969 strempty(err_msg),
2970 err_msg && !endswith(err_msg, ".") ? "." : "",
2971 err_msg ? " " : "");
5ecb131d 2972}
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