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Merge pull request #17418 from poettering/news-247-more
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
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"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
093e3533 24#include "networkd-address.h"
3ddcbeea 25#include "networkd-can.h"
8fcf1d61 26#include "networkd-dhcp-server.h"
ca5ad760
YW		 27#include "networkd-dhcp4.h"
28#include "networkd-dhcp6.h"
ee446d57 29#include "networkd-fdb.h"
ca5ad760 30#include "networkd-ipv4ll.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 32#include "networkd-link-bus.h"
33#include "networkd-link.h"
8e1ad1ea 34#include "networkd-lldp-tx.h"
23f53b99 35#include "networkd-manager.h"
dbf63196 36#include "networkd-mdb.h"
1e7a0e21 37#include "networkd-ndisc.h"
e4a71bf3 38#include "networkd-neighbor.h"
75156ccb 39#include "networkd-nexthop.h"
518cd6b5 40#include "networkd-sriov.h"
5e0534f1 41#include "networkd-sysctl.h"
7465dd22 42#include "networkd-radv.h"
bce67bbe 43#include "networkd-routing-policy-rule.h"
8d968fdd 44#include "networkd-wifi.h"
cf1d700d
TG		 45#include "set.h"
46#include "socket-util.h"
bf331d87 47#include "stat-util.h"
15a5e950 48#include "stdio-util.h"
8b43440b 49#include "string-table.h"
51517f9e 50#include "strv.h"
62e021a9 51#include "sysctl-util.h"
34658df2 52#include "tc.h"
e4de7287 53#include "tmpfile-util.h"
299ad32d 54#include "udev-util.h"
cf1d700d 55#include "util.h"
737f1405 56#include "vrf.h"
fc2f9534 57
2d792895 58bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 59 assert(link);
910feb78 60 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 61
78c958f8
TG		 62 if (link->flags & IFF_LOOPBACK)
63 return false;
64
65 if (!link->network)
66 return false;
67
500b96eb 68 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 69 return false;
70
98d20a17 71 if (STRPTR_IN_SET(link->kind,
72 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 73 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 74 return false;
75
f410d463
YW		 76 /* L3 or L3S mode do not support ARP. */
77 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
78 return false;
79
f2bfcdb9
YW		 80 if (link->network->bond)
81 return false;
82
910feb78 83 return link->network->link_local & mask;
8bc17bb3
SS		 84}
85
f8f2f880 86bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 87 assert(link);
88
fa709992
LP		 89 if (!socket_ipv6_is_supported())
90 return false;
91
d0d6a4cd
TG		 92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
500b96eb 98 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 99 return false;
100
101 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
5e0534f1 110bool link_ipv6_enabled(Link *link) {
439689c6
SS		 111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
b102cdca 116 if (link->network->bond)
2b00a4e0
TY		 117 return false;
118
500b96eb 119 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 120 return false;
121
4cef7fe3 122 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 123 if (link_ipv6ll_enabled(link))
124 return true;
125
126 if (network_has_static_ipv6_configurations(link->network))
127 return true;
128
129 return false;
439689c6
SS		 130}
131
34bf3c00
YW		 132static bool link_is_enslaved(Link *link) {
133 if (link->flags & IFF_SLAVE)
134 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
135 return true;
136
34bf3c00
YW		 137 if (!link->network)
138 return false;
139
bb262ef0 140 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 141 return true;
142
bb262ef0
YW		 143 /* TODO: add conditions for other netdevs. */
144
34bf3c00
YW		 145 return false;
146}
147
45e11abf
YW		 148static void link_update_master_operstate(Link *link, NetDev *netdev) {
149 Link *master;
150
151 if (!netdev)
152 return;
153
7936917e
YW		 154 if (netdev->ifindex <= 0)
155 return;
156
45e11abf
YW		 157 if (link_get(link->manager, netdev->ifindex, &master) < 0)
158 return;
159
160 link_update_operstate(master, true);
161}
162
163void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 164 LinkOperationalState operstate;
1678fbb3
YW		 165 LinkCarrierState carrier_state;
166 LinkAddressState address_state;
35c5a9ca 167 _cleanup_strv_free_ char **p = NULL;
1678fbb3 168 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 169 bool changed = false;
1678fbb3 170 Address *address;
14153d1b 171
84de38c5
TG		 172 assert(link);
173
174 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 175 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 176 else if (link_has_carrier(link)) {
1678fbb3
YW		 177 if (link_is_enslaved(link))
178 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 179 else
1678fbb3 180 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 181 } else if (link->flags & IFF_UP)
1678fbb3 182 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 183 else
1678fbb3 184 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 185
1678fbb3 186 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 187 Link *slave;
188
90e74a66 189 SET_FOREACH(slave, link->slaves) {
959f65d3 190 link_update_operstate(slave, false);
84de38c5 191
1678fbb3
YW		 192 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
193 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 194 }
959f65d3 195 }
84de38c5 196
90e74a66 197 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 198 if (!address_is_ready(address))
199 continue;
84de38c5 200
1678fbb3
YW		 201 if (address->scope < scope)
202 scope = address->scope;
203 }
84de38c5 204
1678fbb3 205 /* for operstate we also take foreign addresses into account */
90e74a66 206 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 207 if (!address_is_ready(address))
208 continue;
209
210 if (address->scope < scope)
211 scope = address->scope;
212 }
213
214 if (scope < RT_SCOPE_SITE)
215 /* universally accessible addresses found */
216 address_state = LINK_ADDRESS_STATE_ROUTABLE;
217 else if (scope < RT_SCOPE_HOST)
218 /* only link or site local addresses found */
219 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 220 else
1678fbb3
YW		 221 /* no useful addresses found */
222 address_state = LINK_ADDRESS_STATE_OFF;
223
224 /* Mapping of address and carrier state vs operational state
225 * carrier state
226 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
227 * ------------------------------------------------------------------------------
228 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
229 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
230 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
231 */
84de38c5 232
1678fbb3
YW		 233 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
234 operstate = (LinkOperationalState) carrier_state;
235 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
236 operstate = LINK_OPERSTATE_ROUTABLE;
237 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
238 operstate = LINK_OPERSTATE_DEGRADED;
239 else
14153d1b
YW		 240 operstate = LINK_OPERSTATE_ENSLAVED;
241
35c5a9ca
YW		 242 if (link->carrier_state != carrier_state) {
243 link->carrier_state = carrier_state;
244 changed = true;
245 if (strv_extend(&p, "CarrierState") < 0)
246 log_oom();
247 }
959f65d3 248
35c5a9ca
YW		 249 if (link->address_state != address_state) {
250 link->address_state = address_state;
251 changed = true;
252 if (strv_extend(&p, "AddressState") < 0)
253 log_oom();
959f65d3
YW		 254 }
255
84de38c5
TG		 256 if (link->operstate != operstate) {
257 link->operstate = operstate;
35c5a9ca
YW		 258 changed = true;
259 if (strv_extend(&p, "OperationalState") < 0)
260 log_oom();
84de38c5 261 }
959f65d3 262
35c5a9ca
YW		 263 if (p)
264 link_send_changed_strv(link, p);
265 if (changed)
266 link_dirty(link);
267
45e11abf
YW		 268 if (also_update_master && link->network) {
269 link_update_master_operstate(link, link->network->bond);
270 link_update_master_operstate(link, link->network->bridge);
959f65d3 271 }
84de38c5
TG		 272}
273
51d18171
TG		 274#define FLAG_STRING(string, flag, old, new) \
275 (((old ^ new) & flag) \
276 ? ((old & flag) ? (" -" string) : (" +" string)) \
277 : "")
278
bb262ef0 279static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 280 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
281 uint8_t operstate;
282 int r;
283
284 assert(link);
285
286 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 287 if (r < 0)
288 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 289
1c4baffc 290 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 291 if (r < 0)
292 /* if we got a message without operstate, take it to mean
293 the state was unchanged */
294 operstate = link->kernel_operstate;
295
bb262ef0 296 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 297 return 0;
298
299 if (link->flags != flags) {
6a7a4e4d 300 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		 301 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
302 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
303 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
304 FLAG_STRING("UP", IFF_UP, link->flags, flags),
305 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
306 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
307 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
308 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
309 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
310 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
311 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
312 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
313 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
314 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
315 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
316 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
317 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
318 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
319 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
320
321 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
322 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
323 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
324 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
325 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
326 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
327 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
328 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
329
330 /* link flags are currently at most 18 bits, let's align to
331 * printing 20 */
332 if (unknown_flags_added)
79008bdd 333 log_link_debug(link,
6a7a4e4d 334 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 335 unknown_flags_added);
336
337 if (unknown_flags_removed)
79008bdd 338 log_link_debug(link,
6a7a4e4d 339 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 340 unknown_flags_removed);
341 }
342
343 link->flags = flags;
344 link->kernel_operstate = operstate;
345
959f65d3 346 link_update_operstate(link, true);
51d18171
TG		 347
348 return 0;
349}
350
1c4baffc 351static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 352 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 353 const char *ifname, *kind = NULL;
b710e6b6 354 unsigned short iftype;
572b21d9
YW		 355 int r, ifindex;
356 uint16_t type;
f579559b 357
0c2f9b84 358 assert(manager);
505f8da7 359 assert(message);
f579559b
TG		 360 assert(ret);
361
6cad256d
TJ		 362 /* check for link kind */
363 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
364 if (r == 0) {
db2f8a2e 365 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 366 r = sd_netlink_message_exit_container(message);
367 if (r < 0)
368 return r;
369 }
370
1c4baffc 371 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 372 if (r < 0)
373 return r;
374 else if (type != RTM_NEWLINK)
375 return -EINVAL;
376
377 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
378 if (r < 0)
379 return r;
380 else if (ifindex <= 0)
381 return -EINVAL;
382
b710e6b6
LP		 383 r = sd_rtnl_message_link_get_type(message, &iftype);
384 if (r < 0)
385 return r;
386
1c4baffc 387 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 388 if (r < 0)
389 return r;
390
17f9c355 391 link = new(Link, 1);
f579559b
TG		 392 if (!link)
393 return -ENOMEM;
394
17f9c355
YW		 395 *link = (Link) {
396 .n_ref = 1,
397 .manager = manager,
398 .state = LINK_STATE_PENDING,
17f9c355
YW		 399 .ifindex = ifindex,
400 .iftype = iftype,
15761549
YW		 401
402 .n_dns = (unsigned) -1,
403 .dns_default_route = -1,
404 .llmnr = _RESOLVE_SUPPORT_INVALID,
405 .mdns = _RESOLVE_SUPPORT_INVALID,
406 .dnssec_mode = _DNSSEC_MODE_INVALID,
407 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 408 };
409
505f8da7
TG		 410 link->ifname = strdup(ifname);
411 if (!link->ifname)
412 return -ENOMEM;
f579559b 413
6cad256d
TJ		 414 if (kind) {
415 link->kind = strdup(kind);
416 if (!link->kind)
417 return -ENOMEM;
418 }
419
cbff7170
TJ		 420 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
421 if (r < 0)
422 log_link_debug_errno(link, r, "New device has no master, continuing without");
423
1c4baffc 424 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 425 if (r < 0)
34437b4f 426 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 427
c643bda5 428 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 429 if (r < 0)
430 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
431
c643bda5
YW		 432 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
433 if (r < 0)
434 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
435
572b21d9
YW		 436 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
437 if (r < 0 && r != -ENODATA)
438 return r;
439
34437b4f 440 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 441 return -ENOMEM;
fe8db0c5 442
34437b4f 443 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 444 return -ENOMEM;
445
34437b4f 446 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 447 return -ENOMEM;
448
d5099efc 449 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 450 if (r < 0)
451 return r;
452
453 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 454 if (r < 0)
455 return r;
456
bb262ef0 457 r = link_update_flags(link, message, false);
51d18171
TG		 458 if (r < 0)
459 return r;
460
1cc6c93a 461 *ret = TAKE_PTR(link);
f579559b
TG		 462
463 return 0;
464}
465
15761549
YW		 466void link_ntp_settings_clear(Link *link) {
467 link->ntp = strv_free(link->ntp);
468}
469
470void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 471 if (link->n_dns != (unsigned) -1)
472 for (unsigned i = 0; i < link->n_dns; i++)
473 in_addr_full_free(link->dns[i]);
15761549
YW		 474 link->dns = mfree(link->dns);
475 link->n_dns = (unsigned) -1;
476
477 link->search_domains = ordered_set_free_free(link->search_domains);
478 link->route_domains = ordered_set_free_free(link->route_domains);
479
480 link->dns_default_route = -1;
481 link->llmnr = _RESOLVE_SUPPORT_INVALID;
482 link->mdns = _RESOLVE_SUPPORT_INVALID;
483 link->dnssec_mode = _DNSSEC_MODE_INVALID;
484 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
485
486 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
487}
488
1a6bb31f
YW		 489static void link_free_engines(Link *link) {
490 if (!link)
491 return;
492
493 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
494 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
495 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 496 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 497
498 link->lldp = sd_lldp_unref(link->lldp);
1c494872 499 link_lldp_emit_stop(link);
1a6bb31f
YW		 500
501 ndisc_flush(link);
502
503 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
504 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 505 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 506 link->ndisc = sd_ndisc_unref(link->ndisc);
507 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 508
509 ipv4_dad_unref(link);
1a6bb31f
YW		 510}
511
8301aa0b 512static Link *link_free(Link *link) {
8301aa0b 513 assert(link);
f579559b 514
15761549
YW		 515 link_ntp_settings_clear(link);
516 link_dns_settings_clear(link);
517
8eec0b9d
YW		 518 link->routes = set_free(link->routes);
519 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 520 link->dhcp_routes = set_free(link->dhcp_routes);
521 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 522 link->dhcp6_routes = set_free(link->dhcp6_routes);
523 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
524 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
525 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 526 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 527
8eec0b9d
YW		 528 link->nexthops = set_free(link->nexthops);
529 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 530
8eec0b9d
YW		 531 link->neighbors = set_free(link->neighbors);
532 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 533
8eec0b9d
YW		 534 link->addresses = set_free(link->addresses);
535 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 536 link->pool_addresses = set_free(link->pool_addresses);
e5526518 537 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 538 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
539 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
540 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
541 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 542 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 543
1a6bb31f 544 link_free_engines(link);
68a8723c 545 free(link->lease_file);
49699bac
SS		 546 free(link->lldp_file);
547
c166a070 548 free(link->ifname);
572b21d9 549 strv_free(link->alternative_names);
ceac4078 550 free(link->kind);
8d968fdd 551 free(link->ssid);
c643bda5 552 free(link->driver);
6cad256d 553
db2f8a2e 554 (void) unlink(link->state_file);
fe8db0c5 555 free(link->state_file);
c166a070 556
51517f9e 557 sd_device_unref(link->sd_device);
b5db00e5 558
0d4ad91d 559 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 560 hashmap_free(link->bound_by_links);
561
5f707e12 562 set_free_with_destructor(link->slaves, link_unref);
033295c1 563
c9c908a6
YW		 564 network_unref(link->network);
565
8301aa0b 566 return mfree(link);
14b746f7
TG		 567}
568
8301aa0b 569DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 570
11a7f229
TG		 571int link_get(Manager *m, int ifindex, Link **ret) {
572 Link *link;
11a7f229
TG		 573
574 assert(m);
e856ed00 575 assert(ifindex > 0);
11a7f229
TG		 576 assert(ret);
577
ae06ab10 578 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 579 if (!link)
580 return -ENODEV;
581
582 *ret = link;
583
584 return 0;
585}
586
af9ba57a 587void link_set_state(Link *link, LinkState state) {
e331e246
TG		 588 assert(link);
589
590 if (link->state == state)
591 return;
592
0beb9542
YW		 593 log_link_debug(link, "State changed: %s -> %s",
594 link_state_to_string(link->state),
595 link_state_to_string(state));
596
e331e246
TG		 597 link->state = state;
598
599 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 600}
601
57bd6899
TG		 602static void link_enter_unmanaged(Link *link) {
603 assert(link);
604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 606
84de38c5 607 link_dirty(link);
57bd6899
TG		 608}
609
2a99eed0 610int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 611 int r = 0, k;
612
613 assert(link);
614 assert(link->manager);
615 assert(link->manager->event);
616
80060352
ZJS		 617 bool keep_dhcp = may_keep_dhcp &&
618 link->network &&
619 (link->manager->restarting ||
620 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
621
84add3cd 622 if (!keep_dhcp) {
111bb8f9 623 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 624 if (k < 0)
36c7d709 625 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 626 }
627
84add3cd
YW		 628 k = sd_ipv4acd_stop(link->dhcp_acd);
629 if (k < 0)
630 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 631
2a99eed0
YW		 632 k = sd_dhcp_server_stop(link->dhcp_server);
633 if (k < 0)
634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
635
9cc65242
YW		 636 k = sd_lldp_stop(link->lldp);
637 if (k < 0)
638 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
639
84add3cd
YW		 640 k = sd_ipv4ll_stop(link->ipv4ll);
641 if (k < 0)
642 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 643
490ccbd5 644 k = ipv4_dad_stop(link);
2488e4d9
YW		 645 if (k < 0)
646 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 647
84add3cd
YW		 648 k = sd_dhcp6_client_stop(link->dhcp6_client);
649 if (k < 0)
650 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 651
2ffd6d73
YW		 652 k = dhcp6_pd_remove(link);
653 if (k < 0)
654 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 655
84add3cd
YW		 656 k = sd_ndisc_stop(link->ndisc);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 659
84add3cd
YW		 660 k = sd_radv_stop(link->radv);
661 if (k < 0)
662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 663
7272b25e 664 link_lldp_emit_stop(link);
111bb8f9
TG		 665 return r;
666}
667
b22d8a00 668void link_enter_failed(Link *link) {
ef1ba606 669 assert(link);
f882c247 670
370e9930 671 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 672 return;
673
6a7a4e4d 674 log_link_warning(link, "Failed");
449f7554 675
e331e246 676 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 677
2a99eed0 678 (void) link_stop_engines(link, false);
111bb8f9 679
84de38c5 680 link_dirty(link);
f882c247
TG		 681}
682
7033af49
YW		 683static int link_join_netdevs_after_configured(Link *link) {
684 NetDev *netdev;
7033af49
YW		 685 int r;
686
90e74a66 687 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 688 if (netdev->ifindex > 0)
689 /* Assume already enslaved. */
690 continue;
691
692 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
693 continue;
694
695 log_struct(LOG_DEBUG,
696 LOG_LINK_INTERFACE(link),
697 LOG_NETDEV_INTERFACE(netdev),
698 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
699
700 r = netdev_join(netdev, link, NULL);
701 if (r < 0)
702 return log_struct_errno(LOG_WARNING, r,
703 LOG_LINK_INTERFACE(link),
704 LOG_NETDEV_INTERFACE(netdev),
705 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
706 }
707
708 return 0;
709}
710
e3a7b048 711static void link_enter_configured(Link *link) {
dd43110f
TG		 712 assert(link);
713 assert(link->network);
e3a7b048 714
289e6774 715 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 716 return;
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
7033af49
YW		 720 (void) link_join_netdevs_after_configured(link);
721
84de38c5 722 link_dirty(link);
dd43110f
TG		 723}
724
6accfd31
DA		 725void link_check_ready(Link *link) {
726 Address *a;
6accfd31
DA		 727
728 assert(link);
729
5f58af25
YW		 730 if (link->state == LINK_STATE_CONFIGURED)
731 return;
732
733 if (link->state != LINK_STATE_CONFIGURING) {
734 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 735 return;
39373cb9 736 }
6accfd31
DA		 737
738 if (!link->network)
739 return;
740
39373cb9
YW		 741 if (!link->addresses_configured) {
742 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 743 return;
39373cb9 744 }
6accfd31 745
39373cb9
YW		 746 if (!link->neighbors_configured) {
747 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 748 return;
39373cb9 749 }
6accfd31 750
90e74a66 751 SET_FOREACH(a, link->addresses)
39373cb9
YW		 752 if (!address_is_ready(a)) {
753 _cleanup_free_ char *str = NULL;
754
755 (void) in_addr_to_string(a->family, &a->in_addr, &str);
756 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 757 return;
39373cb9 758 }
6aa5773b 759
39373cb9
YW		 760 if (!link->static_routes_configured) {
761 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 762 return;
39373cb9 763 }
6accfd31 764
39373cb9
YW		 765 if (!link->static_nexthops_configured) {
766 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 767 return;
39373cb9 768 }
c16c7808 769
39373cb9
YW		 770 if (!link->routing_policy_rules_configured) {
771 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 772 return;
39373cb9 773 }
6accfd31 774
39373cb9
YW		 775 if (!link->tc_configured) {
776 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 777 return;
39373cb9 778 }
4ecdcb07 779
39373cb9
YW		 780 if (!link->sr_iov_configured) {
781 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 782 return;
39373cb9 783 }
518cd6b5 784
1f241589
YW		 785 if (!link->bridge_mdb_configured) {
786 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
787 return;
788 }
789
463797c1 790 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 791 bool has_ndisc_address = false;
792 NDiscAddress *n;
6accfd31 793
1c09d84e 794 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 795 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 796 return;
39373cb9 797 }
6accfd31 798
463797c1 799 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 800 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
801 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 802 return;
39373cb9 803 }
6accfd31 804
90e74a66 805 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 806 if (!n->marked) {
807 has_ndisc_address = true;
808 break;
809 }
810
15797d6a 811 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 812 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 813 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
814 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 815 return;
816 }
817
1633c457 818 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 819 if (!link->dhcp4_configured &&
820 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
821 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 822 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 823 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 824 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
825 * an IPv4ll fallback address must be configured. */
826 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
827 return;
828 }
829
d98c546d 830 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 831 __func__,
832 yes_no(link->dhcp4_configured),
833 yes_no(link->dhcp6_address_configured),
834 yes_no(link->dhcp6_route_configured),
835 yes_no(link->dhcp6_pd_address_configured),
836 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 837 yes_no(link->ndisc_addresses_configured),
838 yes_no(link->ndisc_routes_configured));
39373cb9 839 }
463797c1 840 }
6accfd31 841
5f58af25 842 link_enter_configured(link);
6accfd31
DA		 843
844 return;
845}
846
682c65b0 847static int link_set_static_configs(Link *link) {
f882c247
TG		 848 int r;
849
850 assert(link);
851 assert(link->network);
f5be5601 852 assert(link->state != _LINK_STATE_INVALID);
f882c247 853
2428613f 854 /* Reset all *_configured flags we are configuring. */
9b966cee 855 link->request_static_addresses = false;
2428613f 856 link->addresses_configured = false;
6aa5773b 857 link->addresses_ready = false;
2428613f
YW		 858 link->neighbors_configured = false;
859 link->static_routes_configured = false;
c16c7808 860 link->static_nexthops_configured = false;
2428613f
YW		 861 link->routing_policy_rules_configured = false;
862
f6bb7ac5
TJ		 863 r = link_set_bridge_fdb(link);
864 if (r < 0)
865 return r;
866
1f241589
YW		 867 r = link_set_bridge_mdb(link);
868 if (r < 0)
869 return r;
870
58f1fe9a 871 r = link_set_neighbors(link);
f3ef324d
YW		 872 if (r < 0)
873 return r;
e4a71bf3 874
682c65b0
YW		 875 r = link_set_addresses(link);
876 if (r < 0)
877 return r;
bd6379ec 878
fe2bc17c
YW		 879 r = link_set_address_labels(link);
880 if (r < 0)
881 return r;
f882c247 882
e5526518 883 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 884 r = dhcp4_server_configure(link);
885 if (r < 0)
886 return r;
d4cdbea5 887
f882c247
TG		 888 return 0;
889}
890
3a390124 891static int link_configure_continue(Link *link);
55dc8c4a 892
302a796f 893static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 894 int r;
895
896 assert(m);
897 assert(link);
898 assert(link->ifname);
899
55dc8c4a
YW		 900 link->setting_mtu = false;
901
5da8149f 902 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 903 return 1;
904
1c4baffc 905 r = sd_netlink_message_get_errno(m);
4ff296b0 906 if (r < 0)
5ecb131d 907 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 908 else
909 log_link_debug(link, "Setting MTU done.");
55dc8c4a 910
4ff296b0 911 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 912 r = link_configure_continue(link);
4ff296b0
YW		 913 if (r < 0)
914 link_enter_failed(link);
915 }
4f882b2a
TG		 916
917 return 1;
918}
919
933c70a0 920int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 921 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 922 int r;
923
924 assert(link);
925 assert(link->manager);
926 assert(link->manager->rtnl);
927
40288ece
YW		 928 if (mtu == 0 || link->setting_mtu)
929 return 0;
930
933c70a0 931 if (link->mtu == mtu)
ee493106
YW		 932 return 0;
933
6a7a4e4d 934 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 935
6a7a4e4d
LP		 936 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
937 if (r < 0)
938 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 939
44b598a1 940 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 941 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
942 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 943
944 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 945 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 946
72c2500b 947 mtu = IPV6_MIN_MTU;
44b598a1
SS		 948 }
949
1c4baffc 950 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 951 if (r < 0)
952 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 953
302a796f
YW		 954 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
955 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 956 if (r < 0)
957 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 958
ae941762 959 link_ref(link);
1046bf9b 960 link->setting_mtu = true;
b226d99b 961
4f882b2a
TG		 962 return 0;
963}
964
f6fcc1c2
YW		 965static bool link_reduces_vlan_mtu(Link *link) {
966 /* See netif_reduces_vlan_mtu() in kernel. */
967 return streq_ptr(link->kind, "macsec");
968}
969
970static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
971 uint32_t mtu = 0;
972 NetDev *dev;
f6fcc1c2 973
90e74a66 974 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 975 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
976 /* See vlan_dev_change_mtu() in kernel. */
977 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
978
979 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
980 /* See macvlan_change_mtu() in kernel. */
981 mtu = dev->mtu;
982
983 return mtu;
984}
985
986static int link_configure_mtu(Link *link) {
987 uint32_t mtu;
988
989 assert(link);
990 assert(link->network);
991
992 if (link->network->mtu > 0)
993 return link_set_mtu(link, link->network->mtu);
994
995 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
996 if (link->mtu >= mtu)
997 return 0;
998
999 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1000 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1001 link->mtu, mtu);
1002
1003 return link_set_mtu(link, mtu);
1004}
1005
302a796f 1006static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1007 int r;
1008
1009 assert(m);
1010 assert(link);
1011 assert(link->ifname);
1012
1013 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1014 return 1;
1015
1016 r = sd_netlink_message_get_errno(m);
1017 if (r < 0)
5ecb131d 1018 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1019
1020 return 1;
1021}
1022
1023static int link_set_flags(Link *link) {
1024 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1025 unsigned ifi_change = 0;
1026 unsigned ifi_flags = 0;
1027 int r;
1028
1029 assert(link);
1030 assert(link->manager);
1031 assert(link->manager->rtnl);
1032
1033 if (link->flags & IFF_LOOPBACK)
1034 return 0;
1035
1036 if (!link->network)
1037 return 0;
1038
866e6b7a 1039 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1040 return 0;
1041
1042 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1043 if (r < 0)
1044 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1045
1046 if (link->network->arp >= 0) {
1047 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1048 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1049 }
1050
1051 if (link->network->multicast >= 0) {
1052 ifi_change |= IFF_MULTICAST;
1053 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1054 }
1055
866e6b7a
SS		 1056 if (link->network->allmulticast >= 0) {
1057 ifi_change |= IFF_ALLMULTI;
1058 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1059 }
1060
99d2baa2
SS		 1061 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1062 if (r < 0)
1063 return log_link_error_errno(link, r, "Could not set link flags: %m");
1064
302a796f
YW		 1065 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1066 link_netlink_destroy_callback, link);
99d2baa2
SS		 1067 if (r < 0)
1068 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1069
1070 link_ref(link);
1071
1072 return 0;
1073}
1074
e7ab854c
TG		 1075static int link_acquire_ipv6_conf(Link *link) {
1076 int r;
1077
1078 assert(link);
1079
2ffd6d73 1080 if (link->ndisc) {
e7ab854c
TG		 1081 log_link_debug(link, "Discovering IPv6 routers");
1082
1e7a0e21 1083 r = sd_ndisc_start(link->ndisc);
63348d13 1084 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1085 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1086 }
1087
086b8853 1088 if (link->radv) {
7465dd22
PF		 1089 assert(link->radv);
1090 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1091
1092 log_link_debug(link, "Starting IPv6 Router Advertisements");
1093
fd3ef936
YW		 1094 r = radv_emit_dns(link);
1095 if (r < 0)
1096 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1097
7465dd22
PF		 1098 r = sd_radv_start(link->radv);
1099 if (r < 0 && r != -EBUSY)
1100 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1101 }
1102
838d39af
SS		 1103 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1104 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1105 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1106 assert(link->dhcp6_client);
1107 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1108
838d39af 1109 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1110 if (r < 0 && r != -EBUSY)
1633c457 1111 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1112 else
1113 log_link_debug(link, "Acquiring DHCPv6 lease");
1114 }
1115
1633c457
YW		 1116 r = dhcp6_request_prefix_delegation(link);
1117 if (r < 0)
1118 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1119
e7ab854c
TG		 1120 return 0;
1121}
1122
6fc25497 1123static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1124 int r;
1125
1126 assert(link);
ff254138
TG		 1127 assert(link->manager);
1128 assert(link->manager->event);
1129
910feb78 1130 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1131 assert(link->ipv4ll);
ff254138 1132
6a7a4e4d 1133 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1134
1135 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1136 if (r < 0)
1137 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1138 }
1139
2ffd6d73 1140 if (link->dhcp_client) {
6a7a4e4d 1141 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1142
5c1d3fc9 1143 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1144 if (r < 0)
1145 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1146 }
ff254138 1147
6fc25497
SS		 1148 return 0;
1149}
1150
1151static int link_acquire_conf(Link *link) {
1152 int r;
1153
1154 assert(link);
1155
1156 r = link_acquire_ipv4_conf(link);
1157 if (r < 0)
1158 return r;
1159
3f7cc080 1160 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1161 r = link_acquire_ipv6_conf(link);
1162 if (r < 0)
1163 return r;
1164 }
1165
2ffd6d73
YW		 1166 r = link_lldp_emit_start(link);
1167 if (r < 0)
1168 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1169
ff254138
TG		 1170 return 0;
1171}
1172
a61bb41c 1173bool link_has_carrier(Link *link) {
deb2e523
TG		 1174 /* see Documentation/networking/operstates.txt in the kernel sources */
1175
a61bb41c 1176 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1177 return true;
1178
a61bb41c 1179 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1180 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1181 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1182 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1183 return true;
1184
1185 return false;
1186}
1187
0e2fdb83
SS		 1188static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1189 int r;
1190
1191 assert(link);
1192
9524014e
DS		 1193 link->setting_genmode = false;
1194
0e2fdb83
SS		 1195 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1196 return 1;
1197
1198 r = sd_netlink_message_get_errno(m);
1199 if (r < 0)
5ecb131d 1200 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1201 else
1202 log_link_debug(link, "Setting address genmode done.");
1203
1204 if (link->state == LINK_STATE_INITIALIZED) {
1205 r = link_configure_continue(link);
1206 if (r < 0)
1207 link_enter_failed(link);
1208 }
0e2fdb83
SS		 1209
1210 return 1;
1211}
1212
1213static int link_configure_addrgen_mode(Link *link) {
1214 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1215 uint8_t ipv6ll_mode;
1216 int r;
1217
1218 assert(link);
1219 assert(link->network);
1220 assert(link->manager);
1221 assert(link->manager->rtnl);
1222
9524014e 1223 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1224 return 0;
1225
0e2fdb83
SS		 1226 log_link_debug(link, "Setting address genmode for link");
1227
1228 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1229 if (r < 0)
1230 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1231
1232 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1233 if (r < 0)
1234 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1235
1236 r = sd_netlink_message_open_container(req, AF_INET6);
1237 if (r < 0)
1238 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1239
1240 if (!link_ipv6ll_enabled(link))
1241 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1242 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1243 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1244 if (r < 0) {
1245 /* The file may not exist. And even if it exists, when stable_secret is unset,
1246 * reading the file fails with EIO. */
1247 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1248
1249 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1250 } else
1251 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1252 } else
6f6296b9 1253 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1254
1255 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1256 if (r < 0)
1257 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1258
1259 r = sd_netlink_message_close_container(req);
1260 if (r < 0)
1261 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1262
1263 r = sd_netlink_message_close_container(req);
1264 if (r < 0)
1265 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1266
1267 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1268 link_netlink_destroy_callback, link);
1269 if (r < 0)
1270 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1271
1272 link_ref(link);
9524014e 1273 link->setting_genmode = true;
0e2fdb83
SS		 1274
1275 return 0;
1276}
1277
302a796f 1278static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1279 int r;
1280
1746cf2a
TG		 1281 assert(link);
1282
5da8149f 1283 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1284 return 1;
1285
1c4baffc 1286 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1287 if (r < 0)
26d6b214 1288 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1289 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1290
f882c247
TG		 1291 return 1;
1292}
1293
1cc84f3b 1294static int link_up(Link *link) {
4afd3348 1295 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1296 int r;
1297
f882c247 1298 assert(link);
c106cc36 1299 assert(link->network);
f882c247
TG		 1300 assert(link->manager);
1301 assert(link->manager->rtnl);
1302
6a7a4e4d 1303 log_link_debug(link, "Bringing link up");
449f7554 1304
6a7a4e4d
LP		 1305 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1306 if (r < 0)
1307 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1308
2b2d8603 1309 /* set it free if not enslaved with networkd */
6cb955c6 1310 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1311 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1312 if (r < 0)
1313 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1314 }
1315
5d4795f3 1316 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1317 if (r < 0)
1318 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1319
c106cc36 1320 if (link->network->mac) {
1c4baffc 1321 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1322 if (r < 0)
1323 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1324 }
1325
302a796f
YW		 1326 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1327 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1328 if (r < 0)
1329 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1330
b226d99b
TG		 1331 link_ref(link);
1332
f882c247
TG		 1333 return 0;
1334}
1335
302a796f 1336static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1337 int r;
1338
1339 assert(link);
1340
1341 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1342 return 1;
1343
1c4baffc 1344 r = sd_netlink_message_get_errno(m);
0d4ad91d 1345 if (r < 0)
5ecb131d 1346 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1347
1348 return 1;
1349}
1350
8e54db83 1351int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1352 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1353 int r;
1354
1355 assert(link);
1356 assert(link->manager);
1357 assert(link->manager->rtnl);
1358
6a7a4e4d 1359 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1360
1361 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1362 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1365
1366 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1367 if (r < 0)
1368 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1369
8e54db83
YW		 1370 r = netlink_call_async(link->manager->rtnl, NULL, req,
1371 callback ?: link_down_handler,
302a796f 1372 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1373 if (r < 0)
1374 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1375
1376 link_ref(link);
1377
1378 return 0;
1379}
1380
89fe6535
SS		 1381static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1382 int r;
1383
1384 assert(link);
1385
1386 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1387 return 1;
1388
1389 r = sd_netlink_message_get_errno(m);
1390 if (r < 0)
1391 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1392
1393 return 1;
1394}
1395
1396static int link_set_group(Link *link) {
1397 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1398 int r;
1399
1400 assert(link);
1401 assert(link->network);
1402 assert(link->manager);
1403 assert(link->manager->rtnl);
1404
1405 if (link->network->group <= 0)
1406 return 0;
1407
1408 log_link_debug(link, "Setting group");
1409
1410 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1411 if (r < 0)
1412 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1413
1414 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1415 if (r < 0)
1416 return log_link_error_errno(link, r, "Could not set link group: %m");
1417
1418 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1419 link_netlink_destroy_callback, link);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1422
1423 link_ref(link);
1424
1425 return 0;
1426}
1427
0d4ad91d
AR		 1428static int link_handle_bound_to_list(Link *link) {
1429 Link *l;
0d4ad91d
AR		 1430 int r;
1431 bool required_up = false;
1432 bool link_is_up = false;
1433
1434 assert(link);
1435
1436 if (hashmap_isempty(link->bound_to_links))
1437 return 0;
1438
1439 if (link->flags & IFF_UP)
1440 link_is_up = true;
1441
90e74a66 1442 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1443 if (link_has_carrier(l)) {
1444 required_up = true;
1445 break;
1446 }
1447
1448 if (!required_up && link_is_up) {
8e54db83 1449 r = link_down(link, NULL);
0d4ad91d
AR		 1450 if (r < 0)
1451 return r;
1452 } else if (required_up && !link_is_up) {
1453 r = link_up(link);
1454 if (r < 0)
1455 return r;
1456 }
1457
1458 return 0;
1459}
1460
1461static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1462 Link *l;
1463 int r;
1464
1465 assert(link);
1466
1467 if (hashmap_isempty(link->bound_by_links))
1468 return 0;
1469
90e74a66 1470 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1471 r = link_handle_bound_to_list(l);
1472 if (r < 0)
1473 return r;
1474 }
1475
1476 return 0;
1477}
1478
1479static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1480 int r;
1481
1482 assert(link);
1483 assert(carrier);
1484
1485 if (link == carrier)
1486 return 0;
1487
1488 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1489 return 0;
1490
1491 r = hashmap_ensure_allocated(h, NULL);
1492 if (r < 0)
1493 return r;
1494
1495 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1496 if (r < 0)
1497 return r;
1498
1499 return 0;
1500}
1501
1502static int link_new_bound_by_list(Link *link) {
1503 Manager *m;
1504 Link *carrier;
0d4ad91d
AR		 1505 int r;
1506 bool list_updated = false;
1507
1508 assert(link);
1509 assert(link->manager);
1510
1511 m = link->manager;
1512
90e74a66 1513 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1514 if (!carrier->network)
1515 continue;
1516
1517 if (strv_isempty(carrier->network->bind_carrier))
1518 continue;
1519
191a3f16 1520 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1521 r = link_put_carrier(link, carrier, &link->bound_by_links);
1522 if (r < 0)
1523 return r;
1524
1525 list_updated = true;
1526 }
1527 }
1528
1529 if (list_updated)
84de38c5 1530 link_dirty(link);
0d4ad91d 1531
90e74a66 1532 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1533 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1534 if (r < 0)
1535 return r;
1536
84de38c5 1537 link_dirty(carrier);
0d4ad91d
AR		 1538 }
1539
1540 return 0;
1541}
1542
1543static int link_new_bound_to_list(Link *link) {
1544 Manager *m;
1545 Link *carrier;
0d4ad91d
AR		 1546 int r;
1547 bool list_updated = false;
1548
1549 assert(link);
1550 assert(link->manager);
1551
1552 if (!link->network)
1553 return 0;
1554
1555 if (strv_isempty(link->network->bind_carrier))
1556 return 0;
1557
1558 m = link->manager;
1559
90e74a66 1560 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1561 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1562 r = link_put_carrier(link, carrier, &link->bound_to_links);
1563 if (r < 0)
1564 return r;
1565
1566 list_updated = true;
1567 }
1568 }
1569
1570 if (list_updated)
84de38c5 1571 link_dirty(link);
0d4ad91d 1572
90e74a66 1573 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1574 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1575 if (r < 0)
1576 return r;
1577
84de38c5 1578 link_dirty(carrier);
0d4ad91d
AR		 1579 }
1580
1581 return 0;
1582}
1583
1584static int link_new_carrier_maps(Link *link) {
1585 int r;
1586
1587 r = link_new_bound_by_list(link);
1588 if (r < 0)
1589 return r;
1590
1591 r = link_handle_bound_by_list(link);
1592 if (r < 0)
1593 return r;
1594
1595 r = link_new_bound_to_list(link);
1596 if (r < 0)
1597 return r;
1598
1599 r = link_handle_bound_to_list(link);
1600 if (r < 0)
1601 return r;
1602
1603 return 0;
1604}
1605
1606static void link_free_bound_to_list(Link *link) {
1607 Link *bound_to;
0d4ad91d 1608
90e74a66 1609 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1610 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1611
1612 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1613 link_dirty(bound_to);
0d4ad91d
AR		 1614 }
1615
1616 return;
1617}
1618
1619static void link_free_bound_by_list(Link *link) {
1620 Link *bound_by;
0d4ad91d 1621
90e74a66 1622 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1623 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1624
1625 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1626 link_dirty(bound_by);
0d4ad91d
AR		 1627 link_handle_bound_to_list(bound_by);
1628 }
1629 }
1630
1631 return;
1632}
1633
1634static void link_free_carrier_maps(Link *link) {
1635 bool list_updated = false;
1636
1637 assert(link);
1638
1639 if (!hashmap_isempty(link->bound_to_links)) {
1640 link_free_bound_to_list(link);
1641 list_updated = true;
1642 }
1643
1644 if (!hashmap_isempty(link->bound_by_links)) {
1645 link_free_bound_by_list(link);
1646 list_updated = true;
1647 }
1648
1649 if (list_updated)
84de38c5 1650 link_dirty(link);
0d4ad91d
AR		 1651
1652 return;
1653}
1654
5f707e12
YW		 1655static int link_append_to_master(Link *link, NetDev *netdev) {
1656 Link *master;
1657 int r;
1658
1659 assert(link);
1660 assert(netdev);
1661
1662 r = link_get(link->manager, netdev->ifindex, &master);
1663 if (r < 0)
1664 return r;
1665
de7fef4b 1666 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1667 if (r <= 0)
5f707e12
YW		 1668 return r;
1669
1670 link_ref(link);
1671 return 0;
1672}
1673
1674static void link_drop_from_master(Link *link, NetDev *netdev) {
1675 Link *master;
1676
1677 assert(link);
1678
1679 if (!link->manager || !netdev)
1680 return;
1681
1682 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1683 return;
1684
1685 link_unref(set_remove(master->slaves, link));
1686}
1687
1688static void link_detach_from_manager(Link *link) {
1689 if (!link || !link->manager)
1690 return;
1691
1692 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1693 link_clean(link);
1694
1695 /* The following must be called at last. */
1696 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1697 link_unref(link);
1698}
1699
0d4ad91d
AR		 1700void link_drop(Link *link) {
1701 if (!link || link->state == LINK_STATE_LINGER)
1702 return;
1703
1704 link_set_state(link, LINK_STATE_LINGER);
1705
1706 link_free_carrier_maps(link);
1707
5f707e12
YW		 1708 if (link->network) {
1709 link_drop_from_master(link, link->network->bridge);
1710 link_drop_from_master(link, link->network->bond);
1711 }
1712
6a7a4e4d 1713 log_link_debug(link, "Link removed");
0d4ad91d 1714
db2f8a2e 1715 (void) unlink(link->state_file);
c4397d94 1716 link_detach_from_manager(link);
0d4ad91d
AR		 1717}
1718
3f265037 1719static int link_joined(Link *link) {
f882c247
TG		 1720 int r;
1721
ef1ba606 1722 assert(link);
f5be5601 1723 assert(link->network);
dd3efc09 1724
0d4ad91d
AR		 1725 if (!hashmap_isempty(link->bound_to_links)) {
1726 r = link_handle_bound_to_list(link);
1727 if (r < 0)
1728 return r;
1729 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1730 r = link_up(link);
1731 if (r < 0) {
1732 link_enter_failed(link);
1733 return r;
1734 }
ef1ba606 1735 }
f882c247 1736
9ed794a3 1737 if (link->network->bridge) {
e1853b00 1738 r = link_set_bridge(link);
6a7a4e4d
LP		 1739 if (r < 0)
1740 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1741
1742 r = link_append_to_master(link, link->network->bridge);
1743 if (r < 0)
1744 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1745 }
1746
eb64b435 1747 if (link->network->bond) {
7fcee284 1748 r = link_set_bond(link);
eb64b435
SS		 1749 if (r < 0)
1750 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1751
45e11abf 1752 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1753 if (r < 0)
1754 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1755 }
1756
34d7f2c9
YW		 1757 r = link_set_bridge_vlan(link);
1758 if (r < 0)
1759 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1760
c1835a42
RM		 1761 /* Skip setting up addresses until it gets carrier,
1762 or it would try to set addresses twice,
1763 which is bad for non-idempotent steps. */
dad2d78e 1764 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1765 return 0;
1766
b425c3ae 1767 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1768
1769 r = link_acquire_conf(link);
1770 if (r < 0)
1771 return r;
1772
682c65b0 1773 return link_set_static_configs(link);
02b59d57
TG		 1774}
1775
302a796f 1776static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1777 int r;
1778
1746cf2a 1779 assert(link);
ef1ba606 1780 assert(link->network);
34bf3c00 1781 assert(link->enslaving > 0);
02b59d57 1782
313cefa1 1783 link->enslaving--;
52433f6b 1784
5da8149f 1785 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1786 return 1;
1787
1c4baffc 1788 r = sd_netlink_message_get_errno(m);
856f962c 1789 if (r < 0 && r != -EEXIST) {
5ecb131d 1790 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1791 link_enter_failed(link);
1792 return 1;
4ff296b0
YW		 1793 }
1794
1795 log_link_debug(link, "Joined netdev");
02b59d57 1796
34bf3c00 1797 if (link->enslaving == 0) {
4ff296b0
YW		 1798 r = link_joined(link);
1799 if (r < 0)
1800 link_enter_failed(link);
34bf3c00 1801 }
02b59d57
TG		 1802
1803 return 1;
1804}
1805
3f265037 1806static int link_enter_join_netdev(Link *link) {
6a0a2f86 1807 NetDev *netdev;
02b59d57
TG		 1808 int r;
1809
1810 assert(link);
1811 assert(link->network);
bd08ce56 1812 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1813
289e6774 1814 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1815
84de38c5 1816 link_dirty(link);
34bf3c00 1817 link->enslaving = 0;
02b59d57 1818
d9c67ea1 1819 if (link->network->bond) {
cbff7170
TJ		 1820 if (link->network->bond->state == NETDEV_STATE_READY &&
1821 link->network->bond->ifindex == link->master_ifindex)
1822 return link_joined(link);
1823
f2341e0a
LP		 1824 log_struct(LOG_DEBUG,
1825 LOG_LINK_INTERFACE(link),
1826 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1827 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1828
34bf3c00
YW		 1829 link->enslaving++;
1830
f2341e0a 1831 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1832 if (r < 0) {
f2341e0a
LP		 1833 log_struct_errno(LOG_WARNING, r,
1834 LOG_LINK_INTERFACE(link),
1835 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1836 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1837 link_enter_failed(link);
1838 return r;
1839 }
0ad6148e
MO		 1840 }
1841
d9c67ea1 1842 if (link->network->bridge) {
f2341e0a
LP		 1843 log_struct(LOG_DEBUG,
1844 LOG_LINK_INTERFACE(link),
1845 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1846 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1847
34bf3c00
YW		 1848 link->enslaving++;
1849
f2341e0a 1850 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1851 if (r < 0) {
f2341e0a
LP		 1852 log_struct_errno(LOG_WARNING, r,
1853 LOG_LINK_INTERFACE(link),
1854 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1855 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1856 link_enter_failed(link);
1857 return r;
1858 }
52433f6b
TG		 1859 }
1860
6cb955c6
AR		 1861 if (link->network->vrf) {
1862 log_struct(LOG_DEBUG,
1863 LOG_LINK_INTERFACE(link),
1864 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1865 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1866
34bf3c00
YW		 1867 link->enslaving++;
1868
6cb955c6
AR		 1869 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1870 if (r < 0) {
1871 log_struct_errno(LOG_WARNING, r,
1872 LOG_LINK_INTERFACE(link),
1873 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1874 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1875 link_enter_failed(link);
1876 return r;
1877 }
6cb955c6
AR		 1878 }
1879
90e74a66 1880 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1881
2b6db913
YW		 1882 if (netdev->ifindex > 0)
1883 /* Assume already enslaved. */
a63e5daa 1884 continue;
a63e5daa 1885
7033af49
YW		 1886 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1887 continue;
1888
f2341e0a
LP		 1889 log_struct(LOG_DEBUG,
1890 LOG_LINK_INTERFACE(link),
1891 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1892 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1893
34bf3c00
YW		 1894 link->enslaving++;
1895
f2341e0a 1896 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1897 if (r < 0) {
f2341e0a
LP		 1898 log_struct_errno(LOG_WARNING, r,
1899 LOG_LINK_INTERFACE(link),
1900 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1901 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1902 link_enter_failed(link);
1903 return r;
1904 }
326cb406
SS		 1905 }
1906
34bf3c00
YW		 1907 if (link->enslaving == 0)
1908 return link_joined(link);
1909
ef1ba606
TG		 1910 return 0;
1911}
1912
5e5b137a 1913static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 1914 int r;
1915
f8f2f880
YW		 1916 r = link_drop_foreign_addresses(link);
1917 if (r < 0)
1918 return r;
5e5b137a 1919
59048336
YW		 1920 r = link_drop_foreign_neighbors(link);
1921 if (r < 0)
1922 return r;
d1bdafd2 1923
779804dd 1924 return link_drop_foreign_routes(link);
5e5b137a
TG		 1925}
1926
3104883d 1927static int link_drop_config(Link *link) {
3104883d
SS		 1928 int r;
1929
d7fbb9f5
YW		 1930 r = link_drop_addresses(link);
1931 if (r < 0)
1932 return r;
3104883d 1933
59048336
YW		 1934 r = link_drop_neighbors(link);
1935 if (r < 0)
1936 return r;
d1bdafd2 1937
62f0ea5f
YW		 1938 r = link_drop_routes(link);
1939 if (r < 0)
1940 return r;
3104883d 1941
c69305ff
LP		 1942 ndisc_flush(link);
1943
3104883d
SS		 1944 return 0;
1945}
1946
256c75fd 1947int link_configure(Link *link) {
4ecdcb07
YW		 1948 int r;
1949
ef1ba606 1950 assert(link);
b22d8a00 1951 assert(link->network);
bd08ce56 1952 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1953
34658df2 1954 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1955 if (r < 0)
1956 return r;
1957
518cd6b5
SS		 1958 r = link_configure_sr_iov(link);
1959 if (r < 0)
1960 return r;
1961
500b96eb 1962 if (link->iftype == ARPHRD_CAN)
93ea7750 1963 return link_configure_can(link);
92c918b0 1964
5e0534f1 1965 r = link_set_sysctl(link);
b69c3180
SS		 1966 if (r < 0)
1967 return r;
8749cbcd 1968
5e0534f1 1969 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 1970 if (r < 0)
1971 return r;
1972
99d2baa2
SS		 1973 r = link_set_flags(link);
1974 if (r < 0)
1975 return r;
1976
89fe6535
SS		 1977 r = link_set_group(link);
1978 if (r < 0)
1979 return r;
1980
2ffd6d73
YW		 1981 r = ipv4ll_configure(link);
1982 if (r < 0)
1983 return r;
64b21ece 1984
2ffd6d73
YW		 1985 r = dhcp4_configure(link);
1986 if (r < 0)
1987 return r;
eb34d4af 1988
2ffd6d73
YW		 1989 r = dhcp6_configure(link);
1990 if (r < 0)
1991 return r;
f5a8c43f 1992
2ffd6d73
YW		 1993 r = ndisc_configure(link);
1994 if (r < 0)
1995 return r;
4138fb2c 1996
086b8853
YW		 1997 r = radv_configure(link);
1998 if (r < 0)
1999 return r;
7465dd22 2000
2ffd6d73
YW		 2001 r = link_lldp_rx_configure(link);
2002 if (r < 0)
2003 return r;
ce43e484 2004
f6fcc1c2 2005 r = link_configure_mtu(link);
40288ece
YW		 2006 if (r < 0)
2007 return r;
44b598a1 2008
9f6e82e6
YW		 2009 r = link_configure_addrgen_mode(link);
2010 if (r < 0)
2011 return r;
0e2fdb83 2012
3a390124
DS		 2013 return link_configure_continue(link);
2014}
2015
2016/* The configuration continues in this separate function, instead of
2017 * including this in the above link_configure() function, for two
2018 * reasons:
2019 * 1) some devices reset the link when the mtu is set, which caused
2020 * an infinite loop here in networkd; see:
2021 * https://github.com/systemd/systemd/issues/6593
2022 * https://github.com/systemd/systemd/issues/9831
2023 * 2) if ipv6ll is disabled, then bringing the interface up must be
2024 * delayed until after we get confirmation from the kernel that
2025 * the addr_gen_mode parameter has been set (via netlink), see:
2026 * https://github.com/systemd/systemd/issues/13882
2027 */
2028static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2029 int r;
2030
2031 assert(link);
2032 assert(link->network);
bd08ce56 2033 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2034
9524014e 2035 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2036 return 0;
2037
4c649652
DS		 2038 /* Drop foreign config, but ignore loopback or critical devices.
2039 * We do not want to remove loopback address or addresses used for root NFS. */
2040 if (!(link->flags & IFF_LOOPBACK) &&
2041 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2042 r = link_drop_foreign_config(link);
2043 if (r < 0)
2044 return r;
2045 }
2046
d236718c
DS		 2047 /* The kernel resets ipv6 mtu after changing device mtu;
2048 * we must set this here, after we've set device mtu */
2049 r = link_set_ipv6_mtu(link);
2050 if (r < 0)
5e0534f1 2051 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2052
3f265037 2053 return link_enter_join_netdev(link);
505f8da7
TG		 2054}
2055
572b21d9 2056static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2057 Network *network;
2058 int r;
2059
572b21d9
YW		 2060 if (m) {
2061 _cleanup_strv_free_ char **s = NULL;
2062
2063 r = sd_netlink_message_get_errno(m);
2064 if (r < 0)
2065 return r;
2066
2067 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2068 if (r < 0 && r != -ENODATA)
2069 return r;
2070
2071 strv_free_and_replace(link->alternative_names, s);
2072 }
2073
c643bda5
YW		 2074 r = network_get(link->manager, link->iftype, link->sd_device,
2075 link->ifname, link->alternative_names, link->driver,
2076 &link->mac, &link->permanent_mac,
2077 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2078 if (r == -ENOENT) {
2079 link_enter_unmanaged(link);
2080 return 0;
2081 } else if (r == 0 && network->unmanaged) {
2082 link_enter_unmanaged(link);
2083 return 0;
2084 } else if (r < 0)
2085 return r;
2086
99b8517c 2087 if (link->network == network && !force)
ad932b15
YW		 2088 return 0;
2089
2090 log_link_info(link, "Re-configuring with %s", network->filename);
2091
2092 /* Dropping old .network file */
2a99eed0 2093 r = link_stop_engines(link, false);
572b21d9 2094 if (r < 0)
ad932b15 2095 return r;
ad932b15 2096
ad932b15
YW		 2097 r = link_drop_config(link);
2098 if (r < 0)
2099 return r;
2100
2c7b826d 2101 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2102 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2103 r = link_drop_foreign_config(link);
2104 if (r < 0)
2105 return r;
2106 }
2107
2108 link_free_carrier_maps(link);
2109 link_free_engines(link);
2110 link->network = network_unref(link->network);
2111
2112 /* Then, apply new .network file */
2113 r = network_apply(network, link);
2114 if (r < 0)
2115 return r;
2116
2117 r = link_new_carrier_maps(link);
2118 if (r < 0)
2119 return r;
2120
2121 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2122 link_dirty(link);
ad932b15
YW		 2123
2124 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2125 * link_configure() is called later asynchronously. */
2126 r = link_configure_duid(link);
2127 if (r <= 0)
2128 return r;
2129
2130 r = link_configure(link);
2131 if (r < 0)
2132 return r;
2133
2134 return 0;
2135}
2136
572b21d9
YW		 2137static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2138 int r;
2139
2140 r = link_reconfigure_internal(link, m, false);
2141 if (r < 0)
2142 link_enter_failed(link);
2143
2144 return 1;
2145}
2146
2147static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2148 int r;
2149
2150 r = link_reconfigure_internal(link, m, true);
2151 if (r < 0)
2152 link_enter_failed(link);
2153
2154 return 1;
2155}
2156
2157int link_reconfigure(Link *link, bool force) {
2158 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2159 int r;
2160
2c0d7ed3
YW		 2161 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2162 return 0;
2163
572b21d9
YW		 2164 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2165 link->ifindex);
2166 if (r < 0)
2167 return r;
2168
2169 r = netlink_call_async(link->manager->rtnl, NULL, req,
2170 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2171 link_netlink_destroy_callback, link);
2172 if (r < 0)
2173 return r;
2174
2175 link_ref(link);
2176
2177 return 0;
2178}
2179
e6bf7774 2180static int link_initialized_and_synced(Link *link) {
505f8da7 2181 Network *network;
505f8da7
TG		 2182 int r;
2183
2184 assert(link);
2185 assert(link->ifname);
2186 assert(link->manager);
2187
bd08ce56
YW		 2188 /* We may get called either from the asynchronous netlink callback,
2189 * or directly for link_add() if running in a container. See link_add(). */
2190 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2191 return 0;
505f8da7 2192
6a7a4e4d 2193 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2194 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2195
0d4ad91d
AR		 2196 r = link_new_bound_by_list(link);
2197 if (r < 0)
2198 return r;
2199
2200 r = link_handle_bound_by_list(link);
2201 if (r < 0)
2202 return r;
2203
c4a03a56 2204 if (!link->network) {
0894cfe4 2205 r = wifi_get_info(link);
8d968fdd
YW		 2206 if (r < 0)
2207 return r;
2208
c643bda5
YW		 2209 r = network_get(link->manager, link->iftype, link->sd_device,
2210 link->ifname, link->alternative_names, link->driver,
2211 &link->mac, &link->permanent_mac,
2212 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2213 if (r == -ENOENT) {
2214 link_enter_unmanaged(link);
4232cf04 2215 return 0;
a09dc546
DM		 2216 } else if (r == 0 && network->unmanaged) {
2217 link_enter_unmanaged(link);
2218 return 0;
c4a03a56
TG		 2219 } else if (r < 0)
2220 return r;
505f8da7 2221
c4a03a56
TG		 2222 if (link->flags & IFF_LOOPBACK) {
2223 if (network->link_local != ADDRESS_FAMILY_NO)
2224 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2225
c4a03a56
TG		 2226 if (network->dhcp != ADDRESS_FAMILY_NO)
2227 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2228
c4a03a56
TG		 2229 if (network->dhcp_server)
2230 log_link_debug(link, "Ignoring DHCP server for loopback link");
2231 }
bd2efe92 2232
7d342c03 2233 r = network_apply(network, link);
c4a03a56
TG		 2234 if (r < 0)
2235 return r;
2236 }
505f8da7 2237
0d4ad91d
AR		 2238 r = link_new_bound_to_list(link);
2239 if (r < 0)
2240 return r;
2241
27dfc982
YW		 2242 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2243 * link_configure() is called later asynchronously. */
2244 r = link_configure_duid(link);
2245 if (r <= 0)
2246 return r;
2247
a748b692
TG		 2248 r = link_configure(link);
2249 if (r < 0)
2250 return r;
2251
4232cf04 2252 return 0;
505f8da7
TG		 2253}
2254
302a796f 2255static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2256 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2257 int r;
2258
572b21d9
YW		 2259 r = sd_netlink_message_get_errno(m);
2260 if (r < 0) {
40681e5c 2261 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2262 link_enter_failed(link);
2263 return 0;
2264 }
2265
2266 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2267 if (r < 0 && r != -ENODATA) {
2268 link_enter_failed(link);
2269 return 0;
2270 }
2271
2272 strv_free_and_replace(link->alternative_names, s);
2273
4ff296b0
YW		 2274 r = link_initialized_and_synced(link);
2275 if (r < 0)
2276 link_enter_failed(link);
e6bf7774
YW		 2277 return 1;
2278}
2279
51517f9e 2280int link_initialized(Link *link, sd_device *device) {
4afd3348 2281 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2282 int r;
2283
2284 assert(link);
2285 assert(link->manager);
2286 assert(link->manager->rtnl);
2287 assert(device);
2288
8434fd5c 2289 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2290 return 0;
2291
51517f9e 2292 if (link->sd_device)
679b3605
TG		 2293 return 0;
2294
79008bdd 2295 log_link_debug(link, "udev initialized link");
bd08ce56 2296 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2297
51517f9e 2298 link->sd_device = sd_device_ref(device);
4f561e8e 2299
3c9b8860
TG		 2300 /* udev has initialized the link, but we don't know if we have yet
2301 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2302 * when it returns we know that the pending NEWLINKs have already been
2303 * processed and that we are up-to-date */
4f561e8e 2304
3c9b8860
TG		 2305 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2306 link->ifindex);
4f561e8e
TG		 2307 if (r < 0)
2308 return r;
2309
302a796f
YW		 2310 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2311 link_netlink_destroy_callback, link);
4f561e8e
TG		 2312 if (r < 0)
2313 return r;
2314
5da8149f
TG		 2315 link_ref(link);
2316
4f561e8e
TG		 2317 return 0;
2318}
2319
c4a03a56 2320static int link_load(Link *link) {
0bc70f1d
TG		 2321 _cleanup_free_ char *network_file = NULL,
2322 *addresses = NULL,
f703cc2c 2323 *routes = NULL,
0bc70f1d
TG		 2324 *dhcp4_address = NULL,
2325 *ipv4ll_address = NULL;
c4a03a56
TG		 2326 int r;
2327
2328 assert(link);
2329
aa8fbc74 2330 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2331 "NETWORK_FILE", &network_file,
2332 "ADDRESSES", &addresses,
f703cc2c 2333 "ROUTES", &routes,
0bc70f1d 2334 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2335 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2336 if (r < 0 && r != -ENOENT)
2337 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2338
2339 if (network_file) {
2340 Network *network;
2341 char *suffix;
2342
2343 /* drop suffix */
2344 suffix = strrchr(network_file, '.');
2345 if (!suffix) {
2346 log_link_debug(link, "Failed to get network name from %s", network_file);
2347 goto network_file_fail;
2348 }
2349 *suffix = '\0';
2350
2351 r = network_get_by_name(link->manager, basename(network_file), &network);
2352 if (r < 0) {
2353 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2354 goto network_file_fail;
2355 }
2356
7d342c03 2357 r = network_apply(network, link);
c4a03a56
TG		 2358 if (r < 0)
2359 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2360 }
2361
2362network_file_fail:
2363
da4d3a61
YW		 2364 r = link_deserialize_addresses(link, addresses);
2365 if (r < 0)
2366 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2367
731ff05b
YW		 2368 r = link_deserialize_routes(link, routes);
2369 if (r < 0)
2370 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2371
571eeba9
YW		 2372 r = link_deserialize_dhcp4(link, dhcp4_address);
2373 if (r < 0)
2374 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2375
daad60d1
YW		 2376 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2377 if (r < 0)
2378 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2379
c4a03a56
TG		 2380 return 0;
2381}
2382
1c4baffc 2383int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2384 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2385 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2386 Link *link;
5a937ea2 2387 int r;
505f8da7
TG		 2388
2389 assert(m);
fbbeb65a 2390 assert(m->rtnl);
505f8da7
TG		 2391 assert(message);
2392 assert(ret);
2393
2394 r = link_new(m, message, ret);
2395 if (r < 0)
2396 return r;
2397
2398 link = *ret;
2399
6a7a4e4d 2400 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2401
c4a03a56
TG		 2402 r = link_load(link);
2403 if (r < 0)
2404 return r;
2405
bf331d87
YW		 2406 if (path_is_read_only_fs("/sys") <= 0) {
2407 /* udev should be around */
ae06ab10 2408 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2409 r = sd_device_new_from_device_id(&device, ifindex_str);
2410 if (r < 0) {
4d59e14f
YW		 2411 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2412 return 0;
5c416fc4 2413 }
505f8da7 2414
5a937ea2 2415 r = sd_device_get_is_initialized(device);
51517f9e 2416 if (r < 0) {
bf331d87 2417 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2418 goto failed;
2419 }
5a937ea2 2420 if (r == 0) {
505f8da7 2421 /* not yet ready */
79008bdd 2422 log_link_debug(link, "link pending udev initialization...");
505f8da7 2423 return 0;
3c4cb064 2424 }
505f8da7 2425
299ad32d
YW		 2426 r = device_is_renaming(device);
2427 if (r < 0) {
bf331d87 2428 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2429 goto failed;
2430 }
2431 if (r > 0) {
bf331d87 2432 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2433 return 0;
2434 }
2435
4f561e8e
TG		 2436 r = link_initialized(link, device);
2437 if (r < 0)
5c416fc4 2438 goto failed;
4f561e8e 2439 } else {
e6bf7774 2440 r = link_initialized_and_synced(link);
4f561e8e 2441 if (r < 0)
5c416fc4 2442 goto failed;
4f561e8e 2443 }
505f8da7 2444
a748b692 2445 return 0;
5c416fc4
TG		 2446failed:
2447 link_enter_failed(link);
2448 return r;
a748b692
TG		 2449}
2450
c601ebf7 2451int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2452 int r;
2453
2454 assert(link);
2455
2456 log_link_info(link, "Gained IPv6LL");
2457
c601ebf7 2458 link->ipv6ll_address = *address;
e7ab854c
TG		 2459 link_check_ready(link);
2460
b9ea3d2e 2461 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2462 r = link_acquire_ipv6_conf(link);
2463 if (r < 0) {
2464 link_enter_failed(link);
2465 return r;
2466 }
2467 }
2468
2469 return 0;
2470}
2471
9c0a72f9
TG		 2472static int link_carrier_gained(Link *link) {
2473 int r;
2474
2475 assert(link);
2476
0894cfe4 2477 r = wifi_get_info(link);
8d968fdd
YW		 2478 if (r < 0)
2479 return r;
2480 if (r > 0) {
572b21d9
YW		 2481 r = link_reconfigure_internal(link, NULL, false);
2482 if (r < 0) {
2483 link_enter_failed(link);
8d968fdd 2484 return r;
572b21d9 2485 }
8d968fdd
YW		 2486 }
2487
b9ea3d2e 2488 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2489 r = link_acquire_conf(link);
2490 if (r < 0) {
2491 link_enter_failed(link);
2492 return r;
2493 }
6fc25497 2494
b425c3ae 2495 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2496 r = link_set_static_configs(link);
6fc25497
SS		 2497 if (r < 0)
2498 return r;
9c0a72f9
TG		 2499 }
2500
0d4ad91d
AR		 2501 r = link_handle_bound_by_list(link);
2502 if (r < 0)
2503 return r;
2504
1f241589
YW		 2505 if (!link->bridge_mdb_configured) {
2506 r = link_set_bridge_mdb(link);
2507 if (r < 0)
2508 return r;
2509 }
2510
2511 if (streq_ptr(link->kind, "bridge")) {
2512 Link *slave;
2513
2514 SET_FOREACH(slave, link->slaves) {
2515 if (slave->bridge_mdb_configured)
2516 continue;
2517
2518 r = link_set_bridge_mdb(slave);
2519 if (r < 0)
2520 link_enter_failed(slave);
2521 }
2522 }
3db468ea 2523
9c0a72f9
TG		 2524 return 0;
2525}
2526
2527static int link_carrier_lost(Link *link) {
2528 int r;
2529
2530 assert(link);
2531
25e992ba 2532 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2533 return 0;
2534
fbdb6605 2535 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2536 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2537 * configuration and stop the clients as well. */
97e7fb39
SS		 2538 if (link->setting_mtu)
2539 return 0;
2540
2a99eed0 2541 r = link_stop_engines(link, false);
9c0a72f9
TG		 2542 if (r < 0) {
2543 link_enter_failed(link);
2544 return r;
2545 }
2546
3104883d
SS		 2547 r = link_drop_config(link);
2548 if (r < 0)
2549 return r;
2550
2c7b826d 2551 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2552 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2553 r = link_drop_foreign_config(link);
2554 if (r < 0)
2555 return r;
2556 }
3104883d 2557
0d4ad91d
AR		 2558 r = link_handle_bound_by_list(link);
2559 if (r < 0)
2560 return r;
2561
9c0a72f9
TG		 2562 return 0;
2563}
2564
2565int link_carrier_reset(Link *link) {
2566 int r;
2567
2568 assert(link);
2569
2570 if (link_has_carrier(link)) {
2571 r = link_carrier_lost(link);
2572 if (r < 0)
2573 return r;
2574
2575 r = link_carrier_gained(link);
2576 if (r < 0)
2577 return r;
2578
6a7a4e4d 2579 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2580 }
2581
2582 return 0;
2583}
2584
d236718c
DS		 2585/* This is called every time an interface admin state changes to up;
2586 * specifically, when IFF_UP flag changes from unset to set */
2587static int link_admin_state_up(Link *link) {
2588 int r;
2589
2590 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2591 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2592 * ipv6_mtu_set prevents this from trying to set it too early before
2593 * the link->network has been setup; we only need to reset it
2594 * here if we've already set it during normal initialization. */
2595 if (link->ipv6_mtu_set) {
2596 r = link_set_ipv6_mtu(link);
2597 if (r < 0)
2598 return r;
2599 }
2600
2601 return 0;
2602}
2603
1c4baffc 2604int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2605 _cleanup_strv_free_ char **s = NULL;
c49b33ac 2606 struct ether_addr mac;
ca4e095a 2607 const char *ifname;
afe7fd56 2608 uint32_t mtu;
d236718c 2609 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2610 int old_master, r;
22936833 2611
dd3efc09 2612 assert(link);
b8941f74 2613 assert(link->ifname);
22936833
TG		 2614 assert(m);
2615
7619683b 2616 if (link->state == LINK_STATE_LINGER) {
5238e957 2617 log_link_info(link, "Link re-added");
289e6774 2618 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2619
2620 r = link_new_carrier_maps(link);
2621 if (r < 0)
2622 return r;
7619683b
TG		 2623 }
2624
1c4baffc 2625 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2626 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2627 Manager *manager = link->manager;
b8941f74 2628
30de2b89 2629 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2630
30de2b89
YW		 2631 link_drop(link);
2632 r = link_add(manager, m, &link);
2633 if (r < 0)
2634 return r;
b8941f74
TG		 2635 }
2636
572b21d9
YW		 2637 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2638 if (r >= 0)
2639 strv_free_and_replace(link->alternative_names, s);
2640
1c4baffc 2641 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2642 if (r >= 0 && mtu > 0) {
2643 link->mtu = mtu;
4e964aa0 2644 if (link->original_mtu == 0) {
afe7fd56 2645 link->original_mtu = mtu;
6a7a4e4d 2646 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2647 }
2648
2649 if (link->dhcp_client) {
3c9b8860
TG		 2650 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2651 link->mtu);
fc95c359
YW		 2652 if (r < 0)
2653 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2654 }
7465dd22
PF		 2655
2656 if (link->radv) {
2657 r = sd_radv_set_mtu(link->radv, link->mtu);
2658 if (r < 0)
2659 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2660 }
9842de0d 2661 }
69629de9 2662
e9189a1f
TG		 2663 /* The kernel may broadcast NEWLINK messages without the MAC address
2664 set, simply ignore them. */
1c4baffc 2665 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 2666 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
2667
2668 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
2669
2670 log_link_debug(link, "Gained new MAC address: "
2671 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2672 mac.ether_addr_octet[0],
2673 mac.ether_addr_octet[1],
2674 mac.ether_addr_octet[2],
2675 mac.ether_addr_octet[3],
2676 mac.ether_addr_octet[4],
2677 mac.ether_addr_octet[5]);
2678
a3adb4a6
YW		 2679 r = ipv4ll_update_mac(link);
2680 if (r < 0)
2681 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2682
d947f7f9
YW		 2683 r = dhcp4_update_mac(link);
2684 if (r < 0)
2685 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2686
eebba6dc
YW		 2687 r = dhcp6_update_mac(link);
2688 if (r < 0)
2689 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2690
be9363cc
YW		 2691 r = dhcp6_update_mac(link);
2692 if (r < 0)
2693 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2694
2695 if (link->ndisc) {
2696 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
2697 if (r < 0)
2698 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2699 }
d93d655c
YW		 2700
2701 r = ipv4_dad_update_mac(link);
2702 if (r < 0)
2703 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2704 }
2705
bb262ef0
YW		 2706 old_master = link->master_ifindex;
2707 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2708
d236718c 2709 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2710 had_carrier = link_has_carrier(link);
2711
bb262ef0 2712 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2713 if (r < 0)
2714 return r;
2715
d236718c
DS		 2716 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2717 log_link_info(link, "Link UP");
2718
2719 r = link_admin_state_up(link);
2720 if (r < 0)
2721 return r;
2722 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2723 log_link_info(link, "Link DOWN");
2724
273eec24
LP		 2725 r = link_update_lldp(link);
2726 if (r < 0)
2727 return r;
2728
a61bb41c
TG		 2729 carrier_gained = !had_carrier && link_has_carrier(link);
2730 carrier_lost = had_carrier && !link_has_carrier(link);
2731
2732 if (carrier_gained) {
6a7a4e4d 2733 log_link_info(link, "Gained carrier");
a61bb41c 2734
9c0a72f9
TG		 2735 r = link_carrier_gained(link);
2736 if (r < 0)
2737 return r;
a61bb41c 2738 } else if (carrier_lost) {
6a7a4e4d 2739 log_link_info(link, "Lost carrier");
a61bb41c 2740
9c0a72f9
TG		 2741 r = link_carrier_lost(link);
2742 if (r < 0)
a61bb41c 2743 return r;
a61bb41c
TG		 2744 }
2745
2746 return 0;
dd3efc09 2747}
fe8db0c5 2748
b295beea
LP		 2749static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2750 bool space = false;
b295beea
LP		 2751 Link *link;
2752
2753 assert(f);
2754 assert(prefix);
2755
2756 if (hashmap_isempty(h))
2757 return;
2758
0d536673 2759 fputs(prefix, f);
90e74a66 2760 HASHMAP_FOREACH(link, h) {
b295beea 2761 if (space)
0d536673 2762 fputc(' ', f);
b295beea
LP		 2763
2764 fprintf(f, "%i", link->ifindex);
2765 space = true;
2766 }
2767
0d536673 2768 fputc('\n', f);
b295beea
LP		 2769}
2770
64581765 2771static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2772 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2773 const char *str;
15761549 2774
64581765
YW		 2775 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2776 continue;
2777
e77bd3fd
YW		 2778 str = in_addr_full_to_string(dns[j]);
2779 if (!str)
15761549 2780 continue;
15761549
YW		 2781
2782 if (*space)
2783 fputc(' ', f);
e77bd3fd 2784 fputs(str, f);
15761549
YW		 2785 *space = true;
2786 }
2787}
2788
d5e172d2
ZJS		 2789static void serialize_addresses(
2790 FILE *f,
2791 const char *lvalue,
2792 bool *space,
2793 char **addresses,
2794 sd_dhcp_lease *lease,
2795 bool conditional,
ddb82ec2 2796 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2797 sd_dhcp6_lease *lease6,
2798 bool conditional6,
2799 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2800 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2801 int r;
2802
2803 bool _space = false;
2804 if (!space)
2805 space = &_space;
2806
2807 if (lvalue)
2808 fprintf(f, "%s=", lvalue);
2809 fputstrv(f, addresses, NULL, space);
2810
2811 if (lease && conditional) {
2812 const struct in_addr *lease_addresses;
2813
2814 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2815 if (r > 0)
d8bff5cc 2816 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2817 }
2818
2819 if (lease6 && conditional6 && lease6_get_addr) {
2820 const struct in6_addr *in6_addrs;
2821
2822 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2823 if (r > 0)
2824 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2825 }
2826
2827 if (lease6 && conditional6 && lease6_get_fqdn) {
2828 char **in6_hosts;
2829
2830 r = lease6_get_fqdn(lease6, &in6_hosts);
2831 if (r > 0)
2832 fputstrv(f, in6_hosts, NULL, space);
2833 }
2834
2835 if (lvalue)
2836 fputc('\n', f);
2837}
2838
fe8db0c5 2839int link_save(Link *link) {
d361b373 2840 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2841 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2842 _cleanup_fclose_ FILE *f = NULL;
2843 int r;
2844
2845 assert(link);
2846 assert(link->state_file);
68a8723c 2847 assert(link->lease_file);
bbf7c048
TG		 2848 assert(link->manager);
2849
370e9930 2850 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2851 (void) unlink(link->state_file);
370e9930
TG		 2852 return 0;
2853 }
2854
34437b4f
LP		 2855 link_lldp_save(link);
2856
deb2e523
TG		 2857 admin_state = link_state_to_string(link->state);
2858 assert(admin_state);
2859
e375dcde
TG		 2860 oper_state = link_operstate_to_string(link->operstate);
2861 assert(oper_state);
deb2e523 2862
ac999bf0
YW		 2863 carrier_state = link_carrier_state_to_string(link->carrier_state);
2864 assert(carrier_state);
2865
2866 address_state = link_address_state_to_string(link->address_state);
2867 assert(address_state);
2868
fe8db0c5
TG		 2869 r = fopen_temporary(link->state_file, &f, &temp_path);
2870 if (r < 0)
6a7a4e4d 2871 goto fail;
fe8db0c5 2872
5512a963 2873 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2874
2875 fprintf(f,
2876 "# This is private data. Do not parse.\n"
deb2e523 2877 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2878 "OPER_STATE=%s\n"
2879 "CARRIER_STATE=%s\n"
2880 "ADDRESS_STATE=%s\n",
2881 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2882
bcb7a07e 2883 if (link->network) {
fe0e16db
YW		 2884 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2885 const char *dhcp_domainname = NULL, *p;
fe0e16db 2886 bool space;
07bdc70d 2887
c1a38904
MTL		 2888 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2889 yes_no(link->network->required_for_online));
2890
d5e172d2
ZJS		 2891 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2892 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2893 strempty(link_operstate_to_string(st.min)),
2894 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2895 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2896
adc5b2e2
TG		 2897 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2898
d5e172d2
ZJS		 2899 /************************************************************/
2900
0d536673 2901 fputs("DNS=", f);
ea352b40 2902 space = false;
15761549 2903 if (link->n_dns != (unsigned) -1)
64581765 2904 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2905 else
64581765 2906 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2907
d5e172d2
ZJS		 2908 serialize_addresses(f, NULL, &space,
2909 NULL,
2910 link->dhcp_lease,
2911 link->network->dhcp_use_dns,
ddb82ec2 2912 SD_DHCP_LEASE_DNS,
1633c457 2913 link->dhcp6_lease,
d5e172d2
ZJS		 2914 link->network->dhcp6_use_dns,
2915 sd_dhcp6_lease_get_dns,
2916 NULL);
1e7a0e21 2917
a8c10331 2918 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2919 ndisc_vacuum(link);
2920
b296797f 2921 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2922 NDiscRDNSS *dd;
2923
90e74a66 2924 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2925 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2926 }
2927
2928 fputc('\n', f);
2929
d5e172d2
ZJS		 2930 /************************************************************/
2931
2932 serialize_addresses(f, "NTP", NULL,
2933 link->ntp ?: link->network->ntp,
2934 link->dhcp_lease,
2935 link->network->dhcp_use_ntp,
ddb82ec2 2936 SD_DHCP_LEASE_NTP,
1633c457 2937 link->dhcp6_lease,
d5e172d2
ZJS		 2938 link->network->dhcp6_use_ntp,
2939 sd_dhcp6_lease_get_ntp_addrs,
2940 sd_dhcp6_lease_get_ntp_fqdn);
2941
2942 serialize_addresses(f, "SIP", NULL,
2a71d57f 2943 NULL,
d5e172d2
ZJS		 2944 link->dhcp_lease,
2945 link->network->dhcp_use_sip,
ddb82ec2 2946 SD_DHCP_LEASE_SIP,
2a71d57f 2947 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2948
2949 /************************************************************/
bd8f6538 2950
b2a81c0b 2951 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2952 if (link->dhcp_lease) {
b2a81c0b 2953 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2954 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2955 }
1633c457
YW		 2956 if (link->dhcp6_lease)
2957 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2958 }
2959
fe0e16db
YW		 2960 fputs("DOMAINS=", f);
2961 space = false;
90e74a66 2962 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2963 fputs_with_space(f, p, NULL, &space);
07bdc70d 2964
1e7a0e21 2965 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 2966 if (dhcp_domainname)
2967 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2968 if (dhcp_domains)
2969 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2970 if (dhcp6_domains)
2971 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2972 }
2973
2974 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
2975 NDiscDNSSL *dd;
1e7a0e21 2976
90e74a66 2977 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 2978 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
2979 }
b2a81c0b 2980
0d536673 2981 fputc('\n', f);
6192b846 2982
d5e172d2
ZJS		 2983 /************************************************************/
2984
fe0e16db
YW		 2985 fputs("ROUTE_DOMAINS=", f);
2986 space = false;
90e74a66 2987 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 2988 fputs_with_space(f, p, NULL, &space);
b2a81c0b 2989
1e7a0e21 2990 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 2991 if (dhcp_domainname)
2992 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2993 if (dhcp_domains)
2994 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2995 if (dhcp6_domains)
2996 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2997 }
2998
2999 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3000 NDiscDNSSL *dd;
1e7a0e21 3001
90e74a66 3002 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3003 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3004 }
b2a81c0b 3005
0d536673 3006 fputc('\n', f);
67272d15 3007
d5e172d2
ZJS		 3008 /************************************************************/
3009
3c9b8860 3010 fprintf(f, "LLMNR=%s\n",
15761549 3011 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3012
3013 /************************************************************/
3014
aaa297d4 3015 fprintf(f, "MDNS=%s\n",
15761549 3016 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3017
d5e172d2
ZJS		 3018 /************************************************************/
3019
3020 int dns_default_route =
3021 link->dns_default_route >= 0 ? link->dns_default_route :
3022 link->network->dns_default_route;
3023 if (dns_default_route >= 0)
3024 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3025
3026 /************************************************************/
3027
3028 DnsOverTlsMode dns_over_tls_mode =
3029 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3030 link->network->dns_over_tls_mode;
3031 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3032 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3033
3034 /************************************************************/
3035
3036 DnssecMode dnssec_mode =
3037 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3038 link->network->dnssec_mode;
3039 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3040 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3041
3042 /************************************************************/
3043
3044 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3045 if (set_isempty(nta_anchors))
3046 nta_anchors = link->network->dnssec_negative_trust_anchors;
3047
3048 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3049 const char *n;
3050
0d536673 3051 fputs("DNSSEC_NTA=", f);
8a516214 3052 space = false;
90e74a66 3053 SET_FOREACH(n, nta_anchors)
d390f8ef 3054 fputs_with_space(f, n, NULL, &space);
0d536673 3055 fputc('\n', f);
8a516214
LP		 3056 }
3057
d5e172d2
ZJS		 3058 /************************************************************/
3059
3b31e2b7
YW		 3060 r = link_serialize_addresses(link, f);
3061 if (r < 0)
3062 goto fail;
c1eb9872 3063
d5e172d2
ZJS		 3064 /************************************************************/
3065
56519412
YW		 3066 r = link_serialize_routes(link, f);
3067 if (r < 0)
3068 goto fail;
bcb7a07e 3069 }
7374f9d8 3070
b295beea
LP		 3071 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3072 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3073
8eb9058d 3074 if (link->dhcp_lease) {
bd91b83e 3075 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3076 if (r < 0)
c2d6bd61 3077 goto fail;
fe8db0c5 3078
7374f9d8 3079 fprintf(f,
b0e39c82
TG		 3080 "DHCP_LEASE=%s\n",
3081 link->lease_file);
deb2e523 3082 } else
6990fb6b 3083 (void) unlink(link->lease_file);
fe8db0c5 3084
ca21a19a
YW		 3085 r = link_serialize_ipv4ll(link, f);
3086 if (r < 0)
3087 goto fail;
0bc70f1d 3088
5460bde5
YW		 3089 r = link_serialize_dhcp6_client(link, f);
3090 if (r < 0)
3091 goto fail;
18d8a2cf 3092
c2d6bd61
LP		 3093 r = fflush_and_check(f);
3094 if (r < 0)
3095 goto fail;
fe8db0c5 3096
c2d6bd61 3097 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3098 r = -errno;
c2d6bd61 3099 goto fail;
fe8db0c5
TG		 3100 }
3101
c2d6bd61 3102 return 0;
dacd6cee 3103
c2d6bd61 3104fail:
6a7a4e4d 3105 (void) unlink(link->state_file);
6a7a4e4d
LP		 3106 if (temp_path)
3107 (void) unlink(temp_path);
3108
dacd6cee 3109 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3110}
3111
84de38c5
TG		 3112/* The serialized state in /run is no longer up-to-date. */
3113void link_dirty(Link *link) {
3114 int r;
3115
3116 assert(link);
3117
0c241a37
SS		 3118 /* mark manager dirty as link is dirty */
3119 manager_dirty(link->manager);
3120
de7fef4b 3121 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3122 if (r <= 0)
de7fef4b 3123 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3124 return;
84de38c5
TG		 3125 link_ref(link);
3126}
3127
3128/* The serialized state in /run is up-to-date */
3129void link_clean(Link *link) {
3130 assert(link);
3131 assert(link->manager);
3132
1046bf9b 3133 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3134}
3135
c2a65950
YW		 3136int link_save_and_clean(Link *link) {
3137 int r;
3138
3139 r = link_save(link);
3140 if (r < 0)
3141 return r;
3142
3143 link_clean(link);
3144 return 0;
3145}
3146
fe8db0c5 3147static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3148 [LINK_STATE_PENDING] = "pending",
bd08ce56 3149 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3150 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3151 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3152 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3153 [LINK_STATE_FAILED] = "failed",
370e9930 3154 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3155};
3156
3157DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3158
3159int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3160 const char *err_msg = NULL;
3161
3162 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3163 return log_link_full_errno(link, level, err,
3164 "%s: %s%s%s%m",
3165 msg,
3166 strempty(err_msg),
3167 err_msg && !endswith(err_msg, ".") ? "." : "",
3168 err_msg ? " " : "");
5ecb131d 3169}
Unnamed repository; edit this file 'description' to name the repository.