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network: move link_enumerate_ipv6_tentative_addresses()
[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);
1a6bb31f
YW		 496
497 link->lldp = sd_lldp_unref(link->lldp);
498
499 ndisc_flush(link);
500
501 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
502 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 503 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 504 link->ndisc = sd_ndisc_unref(link->ndisc);
505 link->radv = sd_radv_unref(link->radv);
506}
507
8301aa0b 508static Link *link_free(Link *link) {
8301aa0b 509 assert(link);
f579559b 510
15761549
YW		 511 link_ntp_settings_clear(link);
512 link_dns_settings_clear(link);
513
8eec0b9d
YW		 514 link->routes = set_free(link->routes);
515 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 516 link->dhcp_routes = set_free(link->dhcp_routes);
517 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 518 link->dhcp6_routes = set_free(link->dhcp6_routes);
519 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
520 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
521 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 522 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 523
8eec0b9d
YW		 524 link->nexthops = set_free(link->nexthops);
525 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 526
8eec0b9d
YW		 527 link->neighbors = set_free(link->neighbors);
528 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 529
8eec0b9d
YW		 530 link->addresses = set_free(link->addresses);
531 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 532 link->pool_addresses = set_free(link->pool_addresses);
e5526518 533 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 534 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
535 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
536 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
537 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 538 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 539
7272b25e 540 link_lldp_emit_stop(link);
1a6bb31f 541 link_free_engines(link);
68a8723c 542 free(link->lease_file);
49699bac
SS		 543 free(link->lldp_file);
544
c166a070 545 free(link->ifname);
572b21d9 546 strv_free(link->alternative_names);
ceac4078 547 free(link->kind);
8d968fdd 548 free(link->ssid);
c643bda5 549 free(link->driver);
6cad256d 550
db2f8a2e 551 (void) unlink(link->state_file);
fe8db0c5 552 free(link->state_file);
c166a070 553
51517f9e 554 sd_device_unref(link->sd_device);
b5db00e5 555
0d4ad91d 556 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 557 hashmap_free(link->bound_by_links);
558
5f707e12 559 set_free_with_destructor(link->slaves, link_unref);
033295c1 560
c9c908a6
YW		 561 network_unref(link->network);
562
8301aa0b 563 return mfree(link);
14b746f7
TG		 564}
565
8301aa0b 566DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 567
11a7f229
TG		 568int link_get(Manager *m, int ifindex, Link **ret) {
569 Link *link;
11a7f229
TG		 570
571 assert(m);
e856ed00 572 assert(ifindex > 0);
11a7f229
TG		 573 assert(ret);
574
ae06ab10 575 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 576 if (!link)
577 return -ENODEV;
578
579 *ret = link;
580
581 return 0;
582}
583
af9ba57a 584void link_set_state(Link *link, LinkState state) {
e331e246
TG		 585 assert(link);
586
587 if (link->state == state)
588 return;
589
0beb9542
YW		 590 log_link_debug(link, "State changed: %s -> %s",
591 link_state_to_string(link->state),
592 link_state_to_string(state));
593
e331e246
TG		 594 link->state = state;
595
596 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 597}
598
57bd6899
TG		 599static void link_enter_unmanaged(Link *link) {
600 assert(link);
601
e331e246 602 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 603
84de38c5 604 link_dirty(link);
57bd6899
TG		 605}
606
95355a28 607int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 608 int r = 0, k;
609
610 assert(link);
611 assert(link->manager);
612 assert(link->manager->event);
613
80060352
ZJS		 614 bool keep_dhcp = may_keep_dhcp &&
615 link->network &&
616 (link->manager->restarting ||
617 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
618
619 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 620 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 621 if (k < 0)
36c7d709 622 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 623 }
624
ba179154 625 if (link->ipv4ll) {
111bb8f9 626 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 627 if (k < 0)
36c7d709 628 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 629 }
630
2488e4d9
YW		 631 k = link_stop_ipv4_dad(link);
632 if (k < 0)
633 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 634
f5a8c43f
TG		 635 if (link->dhcp6_client) {
636 k = sd_dhcp6_client_stop(link->dhcp6_client);
637 if (k < 0)
36c7d709 638 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 639 }
4138fb2c 640
1633c457
YW		 641 if (link_dhcp6_pd_is_enabled(link)) {
642 k = dhcp6_pd_remove(link);
643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
645 }
646
1e7a0e21
LP		 647 if (link->ndisc) {
648 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 649 if (k < 0)
36c7d709 650 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 651 }
652
7465dd22 653 if (link->radv) {
290696e5 654 k = sd_radv_stop(link->radv);
7465dd22
PF		 655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
657 }
658
7272b25e 659 link_lldp_emit_stop(link);
111bb8f9
TG		 660 return r;
661}
662
b22d8a00 663void link_enter_failed(Link *link) {
ef1ba606 664 assert(link);
f882c247 665
370e9930 666 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 667 return;
668
6a7a4e4d 669 log_link_warning(link, "Failed");
449f7554 670
e331e246 671 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 672
95355a28 673 link_stop_clients(link, false);
111bb8f9 674
84de38c5 675 link_dirty(link);
f882c247
TG		 676}
677
7033af49
YW		 678static int link_join_netdevs_after_configured(Link *link) {
679 NetDev *netdev;
7033af49
YW		 680 int r;
681
90e74a66 682 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 683 if (netdev->ifindex > 0)
684 /* Assume already enslaved. */
685 continue;
686
687 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
688 continue;
689
690 log_struct(LOG_DEBUG,
691 LOG_LINK_INTERFACE(link),
692 LOG_NETDEV_INTERFACE(netdev),
693 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
694
695 r = netdev_join(netdev, link, NULL);
696 if (r < 0)
697 return log_struct_errno(LOG_WARNING, r,
698 LOG_LINK_INTERFACE(link),
699 LOG_NETDEV_INTERFACE(netdev),
700 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
701 }
702
703 return 0;
704}
705
e3a7b048 706static void link_enter_configured(Link *link) {
dd43110f
TG		 707 assert(link);
708 assert(link->network);
e3a7b048 709
289e6774 710 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 711 return;
dd43110f 712
e331e246 713 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 714
7033af49
YW		 715 (void) link_join_netdevs_after_configured(link);
716
84de38c5 717 link_dirty(link);
dd43110f
TG		 718}
719
6accfd31
DA		 720void link_check_ready(Link *link) {
721 Address *a;
6accfd31
DA		 722
723 assert(link);
724
5f58af25
YW		 725 if (link->state == LINK_STATE_CONFIGURED)
726 return;
727
728 if (link->state != LINK_STATE_CONFIGURING) {
729 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 730 return;
39373cb9 731 }
6accfd31
DA		 732
733 if (!link->network)
734 return;
735
39373cb9
YW		 736 if (!link->addresses_configured) {
737 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 738 return;
39373cb9 739 }
6accfd31 740
39373cb9
YW		 741 if (!link->neighbors_configured) {
742 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 743 return;
39373cb9 744 }
6accfd31 745
90e74a66 746 SET_FOREACH(a, link->addresses)
39373cb9
YW		 747 if (!address_is_ready(a)) {
748 _cleanup_free_ char *str = NULL;
749
750 (void) in_addr_to_string(a->family, &a->in_addr, &str);
751 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 752 return;
39373cb9 753 }
6aa5773b 754
39373cb9
YW		 755 if (!link->static_routes_configured) {
756 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 757 return;
39373cb9 758 }
6accfd31 759
39373cb9
YW		 760 if (!link->static_nexthops_configured) {
761 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 762 return;
39373cb9 763 }
c16c7808 764
39373cb9
YW		 765 if (!link->routing_policy_rules_configured) {
766 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 767 return;
39373cb9 768 }
6accfd31 769
39373cb9
YW		 770 if (!link->tc_configured) {
771 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 772 return;
39373cb9 773 }
4ecdcb07 774
39373cb9
YW		 775 if (!link->sr_iov_configured) {
776 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 777 return;
39373cb9 778 }
518cd6b5 779
1f241589
YW		 780 if (!link->bridge_mdb_configured) {
781 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
782 return;
783 }
784
463797c1 785 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 786 bool has_ndisc_address = false;
787 NDiscAddress *n;
6accfd31 788
1c09d84e 789 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 790 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 791 return;
39373cb9 792 }
6accfd31 793
463797c1 794 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 795 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
796 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 797 return;
39373cb9 798 }
6accfd31 799
90e74a66 800 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 801 if (!n->marked) {
802 has_ndisc_address = true;
803 break;
804 }
805
15797d6a 806 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 807 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 808 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
809 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 810 return;
811 }
812
1633c457 813 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 814 if (!link->dhcp4_configured &&
815 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
816 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 817 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 818 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 819 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
820 * an IPv4ll fallback address must be configured. */
821 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
822 return;
823 }
824
d98c546d 825 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		 826 __func__,
827 yes_no(link->dhcp4_configured),
828 yes_no(link->dhcp6_address_configured),
829 yes_no(link->dhcp6_route_configured),
830 yes_no(link->dhcp6_pd_address_configured),
831 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 832 yes_no(link->ndisc_addresses_configured),
833 yes_no(link->ndisc_routes_configured));
39373cb9 834 }
463797c1 835 }
6accfd31 836
5f58af25 837 link_enter_configured(link);
6accfd31
DA		 838
839 return;
840}
841
682c65b0 842static int link_set_static_configs(Link *link) {
f882c247
TG		 843 int r;
844
845 assert(link);
846 assert(link->network);
f5be5601 847 assert(link->state != _LINK_STATE_INVALID);
f882c247 848
2428613f 849 /* Reset all *_configured flags we are configuring. */
9b966cee 850 link->request_static_addresses = false;
2428613f 851 link->addresses_configured = false;
6aa5773b 852 link->addresses_ready = false;
2428613f
YW		 853 link->neighbors_configured = false;
854 link->static_routes_configured = false;
c16c7808 855 link->static_nexthops_configured = false;
2428613f
YW		 856 link->routing_policy_rules_configured = false;
857
f6bb7ac5
TJ		 858 r = link_set_bridge_fdb(link);
859 if (r < 0)
860 return r;
861
1f241589
YW		 862 r = link_set_bridge_mdb(link);
863 if (r < 0)
864 return r;
865
58f1fe9a 866 r = link_set_neighbors(link);
f3ef324d
YW		 867 if (r < 0)
868 return r;
e4a71bf3 869
682c65b0
YW		 870 r = link_set_addresses(link);
871 if (r < 0)
872 return r;
bd6379ec 873
fe2bc17c
YW		 874 r = link_set_address_labels(link);
875 if (r < 0)
876 return r;
f882c247 877
e5526518 878 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 879 r = dhcp4_server_configure(link);
880 if (r < 0)
881 return r;
d4cdbea5 882
f882c247
TG		 883 return 0;
884}
885
3a390124 886static int link_configure_continue(Link *link);
55dc8c4a 887
302a796f 888static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 889 int r;
890
891 assert(m);
892 assert(link);
893 assert(link->ifname);
894
55dc8c4a
YW		 895 link->setting_mtu = false;
896
5da8149f 897 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 898 return 1;
899
1c4baffc 900 r = sd_netlink_message_get_errno(m);
4ff296b0 901 if (r < 0)
5ecb131d 902 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 903 else
904 log_link_debug(link, "Setting MTU done.");
55dc8c4a 905
4ff296b0 906 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 907 r = link_configure_continue(link);
4ff296b0
YW		 908 if (r < 0)
909 link_enter_failed(link);
910 }
4f882b2a
TG		 911
912 return 1;
913}
914
933c70a0 915int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 916 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 917 int r;
918
919 assert(link);
920 assert(link->manager);
921 assert(link->manager->rtnl);
922
40288ece
YW		 923 if (mtu == 0 || link->setting_mtu)
924 return 0;
925
933c70a0 926 if (link->mtu == mtu)
ee493106
YW		 927 return 0;
928
6a7a4e4d 929 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 930
6a7a4e4d
LP		 931 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
932 if (r < 0)
933 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 934
44b598a1 935 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 936 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
937 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 938
939 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 940 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 941
72c2500b 942 mtu = IPV6_MIN_MTU;
44b598a1
SS		 943 }
944
1c4baffc 945 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 946 if (r < 0)
947 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 948
302a796f
YW		 949 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
950 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 951 if (r < 0)
952 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 953
ae941762 954 link_ref(link);
1046bf9b 955 link->setting_mtu = true;
b226d99b 956
4f882b2a
TG		 957 return 0;
958}
959
f6fcc1c2
YW		 960static bool link_reduces_vlan_mtu(Link *link) {
961 /* See netif_reduces_vlan_mtu() in kernel. */
962 return streq_ptr(link->kind, "macsec");
963}
964
965static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
966 uint32_t mtu = 0;
967 NetDev *dev;
f6fcc1c2 968
90e74a66 969 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 970 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
971 /* See vlan_dev_change_mtu() in kernel. */
972 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
973
974 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
975 /* See macvlan_change_mtu() in kernel. */
976 mtu = dev->mtu;
977
978 return mtu;
979}
980
981static int link_configure_mtu(Link *link) {
982 uint32_t mtu;
983
984 assert(link);
985 assert(link->network);
986
987 if (link->network->mtu > 0)
988 return link_set_mtu(link, link->network->mtu);
989
990 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
991 if (link->mtu >= mtu)
992 return 0;
993
994 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
995 "If it is not desired, then please explicitly specify MTUBytes= setting.",
996 link->mtu, mtu);
997
998 return link_set_mtu(link, mtu);
999}
1000
302a796f 1001static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1002 int r;
1003
1004 assert(m);
1005 assert(link);
1006 assert(link->ifname);
1007
1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1009 return 1;
1010
1011 r = sd_netlink_message_get_errno(m);
1012 if (r < 0)
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1014
1015 return 1;
1016}
1017
1018static int link_set_flags(Link *link) {
1019 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1020 unsigned ifi_change = 0;
1021 unsigned ifi_flags = 0;
1022 int r;
1023
1024 assert(link);
1025 assert(link->manager);
1026 assert(link->manager->rtnl);
1027
1028 if (link->flags & IFF_LOOPBACK)
1029 return 0;
1030
1031 if (!link->network)
1032 return 0;
1033
866e6b7a 1034 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1035 return 0;
1036
1037 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1038 if (r < 0)
1039 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1040
1041 if (link->network->arp >= 0) {
1042 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1043 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1044 }
1045
1046 if (link->network->multicast >= 0) {
1047 ifi_change |= IFF_MULTICAST;
1048 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1049 }
1050
866e6b7a
SS		 1051 if (link->network->allmulticast >= 0) {
1052 ifi_change |= IFF_ALLMULTI;
1053 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1054 }
1055
99d2baa2
SS		 1056 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1057 if (r < 0)
1058 return log_link_error_errno(link, r, "Could not set link flags: %m");
1059
302a796f
YW		 1060 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1061 link_netlink_destroy_callback, link);
99d2baa2
SS		 1062 if (r < 0)
1063 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1064
1065 link_ref(link);
1066
1067 return 0;
1068}
1069
e7ab854c
TG		 1070static int link_acquire_ipv6_conf(Link *link) {
1071 int r;
1072
1073 assert(link);
1074
e7ab854c 1075 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1076 assert(link->ndisc);
e7ab854c
TG		 1077
1078 log_link_debug(link, "Discovering IPv6 routers");
1079
1e7a0e21 1080 r = sd_ndisc_start(link->ndisc);
63348d13 1081 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1082 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1083 }
1084
086b8853 1085 if (link->radv) {
7465dd22
PF		 1086 assert(link->radv);
1087 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1088
1089 log_link_debug(link, "Starting IPv6 Router Advertisements");
1090
fd3ef936
YW		 1091 r = radv_emit_dns(link);
1092 if (r < 0)
1093 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1094
7465dd22
PF		 1095 r = sd_radv_start(link->radv);
1096 if (r < 0 && r != -EBUSY)
1097 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1098 }
1099
838d39af
SS		 1100 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1101 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1102 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1103 assert(link->dhcp6_client);
1104 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1105
838d39af 1106 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1107 if (r < 0 && r != -EBUSY)
1633c457 1108 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1109 else
1110 log_link_debug(link, "Acquiring DHCPv6 lease");
1111 }
1112
1633c457
YW		 1113 r = dhcp6_request_prefix_delegation(link);
1114 if (r < 0)
1115 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1116
e7ab854c
TG		 1117 return 0;
1118}
1119
6fc25497 1120static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1121 int r;
1122
1123 assert(link);
ff254138
TG		 1124 assert(link->manager);
1125 assert(link->manager->event);
1126
910feb78 1127 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1128 assert(link->ipv4ll);
ff254138 1129
6a7a4e4d 1130 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1131
1132 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1133 if (r < 0)
1134 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1135 }
1136
78c958f8 1137 if (link_dhcp4_enabled(link)) {
eb34d4af 1138 assert(link->dhcp_client);
ff254138 1139
6a7a4e4d 1140 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1141
5c1d3fc9 1142 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1143 if (r < 0)
1144 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1145 }
ff254138 1146
6fc25497
SS		 1147 return 0;
1148}
1149
1150static int link_acquire_conf(Link *link) {
1151 int r;
1152
1153 assert(link);
1154
1155 r = link_acquire_ipv4_conf(link);
1156 if (r < 0)
1157 return r;
1158
3f7cc080 1159 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1160 r = link_acquire_ipv6_conf(link);
1161 if (r < 0)
1162 return r;
1163 }
1164
7272b25e
LP		 1165 if (link_lldp_emit_enabled(link)) {
1166 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1167 if (r < 0)
1168 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1169 }
1170
ff254138
TG		 1171 return 0;
1172}
1173
a61bb41c 1174bool link_has_carrier(Link *link) {
deb2e523
TG		 1175 /* see Documentation/networking/operstates.txt in the kernel sources */
1176
a61bb41c 1177 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1178 return true;
1179
a61bb41c 1180 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1181 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1182 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1183 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1184 return true;
1185
1186 return false;
1187}
1188
0e2fdb83
SS		 1189static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1190 int r;
1191
1192 assert(link);
1193
9524014e
DS		 1194 link->setting_genmode = false;
1195
0e2fdb83
SS		 1196 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1197 return 1;
1198
1199 r = sd_netlink_message_get_errno(m);
1200 if (r < 0)
5ecb131d 1201 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1202 else
1203 log_link_debug(link, "Setting address genmode done.");
1204
1205 if (link->state == LINK_STATE_INITIALIZED) {
1206 r = link_configure_continue(link);
1207 if (r < 0)
1208 link_enter_failed(link);
1209 }
0e2fdb83
SS		 1210
1211 return 1;
1212}
1213
1214static int link_configure_addrgen_mode(Link *link) {
1215 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1216 uint8_t ipv6ll_mode;
1217 int r;
1218
1219 assert(link);
1220 assert(link->network);
1221 assert(link->manager);
1222 assert(link->manager->rtnl);
1223
9524014e 1224 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1225 return 0;
1226
0e2fdb83
SS		 1227 log_link_debug(link, "Setting address genmode for link");
1228
1229 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1230 if (r < 0)
1231 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1232
1233 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1234 if (r < 0)
1235 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1236
1237 r = sd_netlink_message_open_container(req, AF_INET6);
1238 if (r < 0)
1239 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1240
1241 if (!link_ipv6ll_enabled(link))
1242 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1243 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1244 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1245 if (r < 0) {
1246 /* The file may not exist. And even if it exists, when stable_secret is unset,
1247 * reading the file fails with EIO. */
1248 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1249
1250 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1251 } else
1252 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1253 } else
6f6296b9 1254 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1255
1256 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1257 if (r < 0)
1258 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1259
1260 r = sd_netlink_message_close_container(req);
1261 if (r < 0)
1262 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1263
1264 r = sd_netlink_message_close_container(req);
1265 if (r < 0)
1266 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1267
1268 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1269 link_netlink_destroy_callback, link);
1270 if (r < 0)
1271 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1272
1273 link_ref(link);
9524014e 1274 link->setting_genmode = true;
0e2fdb83
SS		 1275
1276 return 0;
1277}
1278
302a796f 1279static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1280 int r;
1281
1746cf2a
TG		 1282 assert(link);
1283
5da8149f 1284 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1285 return 1;
1286
1c4baffc 1287 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1288 if (r < 0)
26d6b214 1289 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1290 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1291
f882c247
TG		 1292 return 1;
1293}
1294
1cc84f3b 1295static int link_up(Link *link) {
4afd3348 1296 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1297 int r;
1298
f882c247 1299 assert(link);
c106cc36 1300 assert(link->network);
f882c247
TG		 1301 assert(link->manager);
1302 assert(link->manager->rtnl);
1303
6a7a4e4d 1304 log_link_debug(link, "Bringing link up");
449f7554 1305
6a7a4e4d
LP		 1306 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1307 if (r < 0)
1308 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1309
2b2d8603 1310 /* set it free if not enslaved with networkd */
6cb955c6 1311 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1312 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1313 if (r < 0)
1314 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1315 }
1316
5d4795f3 1317 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1318 if (r < 0)
1319 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1320
c106cc36 1321 if (link->network->mac) {
1c4baffc 1322 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1325 }
1326
302a796f
YW		 1327 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1328 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1329 if (r < 0)
1330 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1331
b226d99b
TG		 1332 link_ref(link);
1333
f882c247
TG		 1334 return 0;
1335}
1336
302a796f 1337static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1338 int r;
1339
1340 assert(link);
1341
1342 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1343 return 1;
1344
1c4baffc 1345 r = sd_netlink_message_get_errno(m);
0d4ad91d 1346 if (r < 0)
5ecb131d 1347 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1348
1349 return 1;
1350}
1351
8e54db83 1352int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1353 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1354 int r;
1355
1356 assert(link);
1357 assert(link->manager);
1358 assert(link->manager->rtnl);
1359
6a7a4e4d 1360 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1361
1362 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1363 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1366
1367 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1370
8e54db83
YW		 1371 r = netlink_call_async(link->manager->rtnl, NULL, req,
1372 callback ?: link_down_handler,
302a796f 1373 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1374 if (r < 0)
1375 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1376
1377 link_ref(link);
1378
1379 return 0;
1380}
1381
89fe6535
SS		 1382static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1383 int r;
1384
1385 assert(link);
1386
1387 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1388 return 1;
1389
1390 r = sd_netlink_message_get_errno(m);
1391 if (r < 0)
1392 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1393
1394 return 1;
1395}
1396
1397static int link_set_group(Link *link) {
1398 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1399 int r;
1400
1401 assert(link);
1402 assert(link->network);
1403 assert(link->manager);
1404 assert(link->manager->rtnl);
1405
1406 if (link->network->group <= 0)
1407 return 0;
1408
1409 log_link_debug(link, "Setting group");
1410
1411 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1412 if (r < 0)
1413 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1414
1415 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not set link group: %m");
1418
1419 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1420 link_netlink_destroy_callback, link);
1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1423
1424 link_ref(link);
1425
1426 return 0;
1427}
1428
0d4ad91d
AR		 1429static int link_handle_bound_to_list(Link *link) {
1430 Link *l;
0d4ad91d
AR		 1431 int r;
1432 bool required_up = false;
1433 bool link_is_up = false;
1434
1435 assert(link);
1436
1437 if (hashmap_isempty(link->bound_to_links))
1438 return 0;
1439
1440 if (link->flags & IFF_UP)
1441 link_is_up = true;
1442
90e74a66 1443 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1444 if (link_has_carrier(l)) {
1445 required_up = true;
1446 break;
1447 }
1448
1449 if (!required_up && link_is_up) {
8e54db83 1450 r = link_down(link, NULL);
0d4ad91d
AR		 1451 if (r < 0)
1452 return r;
1453 } else if (required_up && !link_is_up) {
1454 r = link_up(link);
1455 if (r < 0)
1456 return r;
1457 }
1458
1459 return 0;
1460}
1461
1462static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1463 Link *l;
1464 int r;
1465
1466 assert(link);
1467
1468 if (hashmap_isempty(link->bound_by_links))
1469 return 0;
1470
90e74a66 1471 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1472 r = link_handle_bound_to_list(l);
1473 if (r < 0)
1474 return r;
1475 }
1476
1477 return 0;
1478}
1479
1480static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1481 int r;
1482
1483 assert(link);
1484 assert(carrier);
1485
1486 if (link == carrier)
1487 return 0;
1488
1489 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1490 return 0;
1491
1492 r = hashmap_ensure_allocated(h, NULL);
1493 if (r < 0)
1494 return r;
1495
1496 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1497 if (r < 0)
1498 return r;
1499
1500 return 0;
1501}
1502
1503static int link_new_bound_by_list(Link *link) {
1504 Manager *m;
1505 Link *carrier;
0d4ad91d
AR		 1506 int r;
1507 bool list_updated = false;
1508
1509 assert(link);
1510 assert(link->manager);
1511
1512 m = link->manager;
1513
90e74a66 1514 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1515 if (!carrier->network)
1516 continue;
1517
1518 if (strv_isempty(carrier->network->bind_carrier))
1519 continue;
1520
191a3f16 1521 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1522 r = link_put_carrier(link, carrier, &link->bound_by_links);
1523 if (r < 0)
1524 return r;
1525
1526 list_updated = true;
1527 }
1528 }
1529
1530 if (list_updated)
84de38c5 1531 link_dirty(link);
0d4ad91d 1532
90e74a66 1533 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1534 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1535 if (r < 0)
1536 return r;
1537
84de38c5 1538 link_dirty(carrier);
0d4ad91d
AR		 1539 }
1540
1541 return 0;
1542}
1543
1544static int link_new_bound_to_list(Link *link) {
1545 Manager *m;
1546 Link *carrier;
0d4ad91d
AR		 1547 int r;
1548 bool list_updated = false;
1549
1550 assert(link);
1551 assert(link->manager);
1552
1553 if (!link->network)
1554 return 0;
1555
1556 if (strv_isempty(link->network->bind_carrier))
1557 return 0;
1558
1559 m = link->manager;
1560
90e74a66 1561 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1562 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1563 r = link_put_carrier(link, carrier, &link->bound_to_links);
1564 if (r < 0)
1565 return r;
1566
1567 list_updated = true;
1568 }
1569 }
1570
1571 if (list_updated)
84de38c5 1572 link_dirty(link);
0d4ad91d 1573
90e74a66 1574 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1575 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1576 if (r < 0)
1577 return r;
1578
84de38c5 1579 link_dirty(carrier);
0d4ad91d
AR		 1580 }
1581
1582 return 0;
1583}
1584
1585static int link_new_carrier_maps(Link *link) {
1586 int r;
1587
1588 r = link_new_bound_by_list(link);
1589 if (r < 0)
1590 return r;
1591
1592 r = link_handle_bound_by_list(link);
1593 if (r < 0)
1594 return r;
1595
1596 r = link_new_bound_to_list(link);
1597 if (r < 0)
1598 return r;
1599
1600 r = link_handle_bound_to_list(link);
1601 if (r < 0)
1602 return r;
1603
1604 return 0;
1605}
1606
1607static void link_free_bound_to_list(Link *link) {
1608 Link *bound_to;
0d4ad91d 1609
90e74a66 1610 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1611 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1612
1613 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1614 link_dirty(bound_to);
0d4ad91d
AR		 1615 }
1616
1617 return;
1618}
1619
1620static void link_free_bound_by_list(Link *link) {
1621 Link *bound_by;
0d4ad91d 1622
90e74a66 1623 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1624 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1625
1626 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1627 link_dirty(bound_by);
0d4ad91d
AR		 1628 link_handle_bound_to_list(bound_by);
1629 }
1630 }
1631
1632 return;
1633}
1634
1635static void link_free_carrier_maps(Link *link) {
1636 bool list_updated = false;
1637
1638 assert(link);
1639
1640 if (!hashmap_isempty(link->bound_to_links)) {
1641 link_free_bound_to_list(link);
1642 list_updated = true;
1643 }
1644
1645 if (!hashmap_isempty(link->bound_by_links)) {
1646 link_free_bound_by_list(link);
1647 list_updated = true;
1648 }
1649
1650 if (list_updated)
84de38c5 1651 link_dirty(link);
0d4ad91d
AR		 1652
1653 return;
1654}
1655
5f707e12
YW		 1656static int link_append_to_master(Link *link, NetDev *netdev) {
1657 Link *master;
1658 int r;
1659
1660 assert(link);
1661 assert(netdev);
1662
1663 r = link_get(link->manager, netdev->ifindex, &master);
1664 if (r < 0)
1665 return r;
1666
de7fef4b 1667 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1668 if (r <= 0)
5f707e12
YW		 1669 return r;
1670
1671 link_ref(link);
1672 return 0;
1673}
1674
1675static void link_drop_from_master(Link *link, NetDev *netdev) {
1676 Link *master;
1677
1678 assert(link);
1679
1680 if (!link->manager || !netdev)
1681 return;
1682
1683 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1684 return;
1685
1686 link_unref(set_remove(master->slaves, link));
1687}
1688
1689static void link_detach_from_manager(Link *link) {
1690 if (!link || !link->manager)
1691 return;
1692
1693 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1694 link_clean(link);
1695
1696 /* The following must be called at last. */
1697 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1698 link_unref(link);
1699}
1700
0d4ad91d
AR		 1701void link_drop(Link *link) {
1702 if (!link || link->state == LINK_STATE_LINGER)
1703 return;
1704
1705 link_set_state(link, LINK_STATE_LINGER);
1706
1707 link_free_carrier_maps(link);
1708
5f707e12
YW		 1709 if (link->network) {
1710 link_drop_from_master(link, link->network->bridge);
1711 link_drop_from_master(link, link->network->bond);
1712 }
1713
6a7a4e4d 1714 log_link_debug(link, "Link removed");
0d4ad91d 1715
db2f8a2e 1716 (void) unlink(link->state_file);
c4397d94 1717 link_detach_from_manager(link);
0d4ad91d
AR		 1718}
1719
3f265037 1720static int link_joined(Link *link) {
f882c247
TG		 1721 int r;
1722
ef1ba606 1723 assert(link);
f5be5601 1724 assert(link->network);
dd3efc09 1725
0d4ad91d
AR		 1726 if (!hashmap_isempty(link->bound_to_links)) {
1727 r = link_handle_bound_to_list(link);
1728 if (r < 0)
1729 return r;
1730 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1731 r = link_up(link);
1732 if (r < 0) {
1733 link_enter_failed(link);
1734 return r;
1735 }
ef1ba606 1736 }
f882c247 1737
9ed794a3 1738 if (link->network->bridge) {
e1853b00 1739 r = link_set_bridge(link);
6a7a4e4d
LP		 1740 if (r < 0)
1741 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1742
1743 r = link_append_to_master(link, link->network->bridge);
1744 if (r < 0)
1745 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1746 }
1747
eb64b435 1748 if (link->network->bond) {
7fcee284 1749 r = link_set_bond(link);
eb64b435
SS		 1750 if (r < 0)
1751 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1752
45e11abf 1753 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1754 if (r < 0)
1755 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1756 }
1757
34d7f2c9
YW		 1758 r = link_set_bridge_vlan(link);
1759 if (r < 0)
1760 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1761
c1835a42
RM		 1762 /* Skip setting up addresses until it gets carrier,
1763 or it would try to set addresses twice,
1764 which is bad for non-idempotent steps. */
dad2d78e 1765 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1766 return 0;
1767
b425c3ae 1768 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 1769 return link_set_static_configs(link);
02b59d57
TG		 1770}
1771
302a796f 1772static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1773 int r;
1774
1746cf2a 1775 assert(link);
ef1ba606 1776 assert(link->network);
34bf3c00 1777 assert(link->enslaving > 0);
02b59d57 1778
313cefa1 1779 link->enslaving--;
52433f6b 1780
5da8149f 1781 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1782 return 1;
1783
1c4baffc 1784 r = sd_netlink_message_get_errno(m);
856f962c 1785 if (r < 0 && r != -EEXIST) {
5ecb131d 1786 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1787 link_enter_failed(link);
1788 return 1;
4ff296b0
YW		 1789 }
1790
1791 log_link_debug(link, "Joined netdev");
02b59d57 1792
34bf3c00 1793 if (link->enslaving == 0) {
4ff296b0
YW		 1794 r = link_joined(link);
1795 if (r < 0)
1796 link_enter_failed(link);
34bf3c00 1797 }
02b59d57
TG		 1798
1799 return 1;
1800}
1801
3f265037 1802static int link_enter_join_netdev(Link *link) {
6a0a2f86 1803 NetDev *netdev;
02b59d57
TG		 1804 int r;
1805
1806 assert(link);
1807 assert(link->network);
bd08ce56 1808 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1809
289e6774 1810 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1811
84de38c5 1812 link_dirty(link);
34bf3c00 1813 link->enslaving = 0;
02b59d57 1814
d9c67ea1 1815 if (link->network->bond) {
cbff7170
TJ		 1816 if (link->network->bond->state == NETDEV_STATE_READY &&
1817 link->network->bond->ifindex == link->master_ifindex)
1818 return link_joined(link);
1819
f2341e0a
LP		 1820 log_struct(LOG_DEBUG,
1821 LOG_LINK_INTERFACE(link),
1822 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1823 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1824
34bf3c00
YW		 1825 link->enslaving++;
1826
f2341e0a 1827 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1828 if (r < 0) {
f2341e0a
LP		 1829 log_struct_errno(LOG_WARNING, r,
1830 LOG_LINK_INTERFACE(link),
1831 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1832 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1833 link_enter_failed(link);
1834 return r;
1835 }
0ad6148e
MO		 1836 }
1837
d9c67ea1 1838 if (link->network->bridge) {
f2341e0a
LP		 1839 log_struct(LOG_DEBUG,
1840 LOG_LINK_INTERFACE(link),
1841 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1842 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1843
34bf3c00
YW		 1844 link->enslaving++;
1845
f2341e0a 1846 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1847 if (r < 0) {
f2341e0a
LP		 1848 log_struct_errno(LOG_WARNING, r,
1849 LOG_LINK_INTERFACE(link),
1850 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1851 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1852 link_enter_failed(link);
1853 return r;
1854 }
52433f6b
TG		 1855 }
1856
6cb955c6
AR		 1857 if (link->network->vrf) {
1858 log_struct(LOG_DEBUG,
1859 LOG_LINK_INTERFACE(link),
1860 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1861 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1862
34bf3c00
YW		 1863 link->enslaving++;
1864
6cb955c6
AR		 1865 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1866 if (r < 0) {
1867 log_struct_errno(LOG_WARNING, r,
1868 LOG_LINK_INTERFACE(link),
1869 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1870 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1871 link_enter_failed(link);
1872 return r;
1873 }
6cb955c6
AR		 1874 }
1875
90e74a66 1876 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1877
2b6db913
YW		 1878 if (netdev->ifindex > 0)
1879 /* Assume already enslaved. */
a63e5daa 1880 continue;
a63e5daa 1881
7033af49
YW		 1882 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1883 continue;
1884
f2341e0a
LP		 1885 log_struct(LOG_DEBUG,
1886 LOG_LINK_INTERFACE(link),
1887 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1888 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1889
34bf3c00
YW		 1890 link->enslaving++;
1891
f2341e0a 1892 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1893 if (r < 0) {
f2341e0a
LP		 1894 log_struct_errno(LOG_WARNING, r,
1895 LOG_LINK_INTERFACE(link),
1896 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1897 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1898 link_enter_failed(link);
1899 return r;
1900 }
326cb406
SS		 1901 }
1902
34bf3c00
YW		 1903 if (link->enslaving == 0)
1904 return link_joined(link);
1905
ef1ba606
TG		 1906 return 0;
1907}
1908
5e5b137a 1909static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 1910 int r;
1911
f8f2f880
YW		 1912 r = link_drop_foreign_addresses(link);
1913 if (r < 0)
1914 return r;
5e5b137a 1915
59048336
YW		 1916 r = link_drop_foreign_neighbors(link);
1917 if (r < 0)
1918 return r;
d1bdafd2 1919
779804dd 1920 return link_drop_foreign_routes(link);
5e5b137a
TG		 1921}
1922
3104883d 1923static int link_drop_config(Link *link) {
3104883d
SS		 1924 int r;
1925
d7fbb9f5
YW		 1926 r = link_drop_addresses(link);
1927 if (r < 0)
1928 return r;
3104883d 1929
59048336
YW		 1930 r = link_drop_neighbors(link);
1931 if (r < 0)
1932 return r;
d1bdafd2 1933
62f0ea5f
YW		 1934 r = link_drop_routes(link);
1935 if (r < 0)
1936 return r;
3104883d 1937
c69305ff
LP		 1938 ndisc_flush(link);
1939
3104883d
SS		 1940 return 0;
1941}
1942
256c75fd 1943int link_configure(Link *link) {
4ecdcb07
YW		 1944 int r;
1945
ef1ba606 1946 assert(link);
b22d8a00 1947 assert(link->network);
bd08ce56 1948 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1949
34658df2 1950 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1951 if (r < 0)
1952 return r;
1953
518cd6b5
SS		 1954 r = link_configure_sr_iov(link);
1955 if (r < 0)
1956 return r;
1957
500b96eb 1958 if (link->iftype == ARPHRD_CAN)
93ea7750 1959 return link_configure_can(link);
92c918b0 1960
5e0534f1 1961 r = link_set_sysctl(link);
b69c3180
SS		 1962 if (r < 0)
1963 return r;
8749cbcd 1964
5e0534f1 1965 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 1966 if (r < 0)
1967 return r;
1968
99d2baa2
SS		 1969 r = link_set_flags(link);
1970 if (r < 0)
1971 return r;
1972
89fe6535
SS		 1973 r = link_set_group(link);
1974 if (r < 0)
1975 return r;
1976
910feb78 1977 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 1978 r = ipv4ll_configure(link);
eb34d4af
TG		 1979 if (r < 0)
1980 return r;
1981 }
1982
78c958f8 1983 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 1984 r = dhcp4_set_promote_secondaries(link);
1985 if (r < 0)
1986 return r;
1987
3c9b8860 1988 r = dhcp4_configure(link);
eb34d4af
TG		 1989 if (r < 0)
1990 return r;
eb34d4af
TG		 1991 }
1992
62379e88
TG		 1993 if (link_dhcp6_enabled(link) ||
1994 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 1995 r = dhcp6_configure(link);
1996 if (r < 0)
1997 return r;
1998 }
1999
2000 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2001 r = ndisc_configure(link);
4138fb2c
PF		 2002 if (r < 0)
2003 return r;
2004 }
2005
086b8853
YW		 2006 r = radv_configure(link);
2007 if (r < 0)
2008 return r;
7465dd22 2009
8e1ad1ea 2010 if (link_lldp_rx_enabled(link)) {
7f853950 2011 r = link_lldp_rx_configure(link);
273eec24
LP		 2012 if (r < 0)
2013 return r;
ce43e484
SS		 2014 }
2015
f6fcc1c2 2016 r = link_configure_mtu(link);
40288ece
YW		 2017 if (r < 0)
2018 return r;
44b598a1 2019
9f6e82e6
YW		 2020 r = link_configure_addrgen_mode(link);
2021 if (r < 0)
2022 return r;
0e2fdb83 2023
051e77ca
SS		 2024 r = link_configure_ipv4_dad(link);
2025 if (r < 0)
2026 return r;
2027
3a390124
DS		 2028 return link_configure_continue(link);
2029}
2030
2031/* The configuration continues in this separate function, instead of
2032 * including this in the above link_configure() function, for two
2033 * reasons:
2034 * 1) some devices reset the link when the mtu is set, which caused
2035 * an infinite loop here in networkd; see:
2036 * https://github.com/systemd/systemd/issues/6593
2037 * https://github.com/systemd/systemd/issues/9831
2038 * 2) if ipv6ll is disabled, then bringing the interface up must be
2039 * delayed until after we get confirmation from the kernel that
2040 * the addr_gen_mode parameter has been set (via netlink), see:
2041 * https://github.com/systemd/systemd/issues/13882
2042 */
2043static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2044 int r;
2045
2046 assert(link);
2047 assert(link->network);
bd08ce56 2048 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2049
9524014e 2050 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2051 return 0;
2052
4c649652
DS		 2053 /* Drop foreign config, but ignore loopback or critical devices.
2054 * We do not want to remove loopback address or addresses used for root NFS. */
2055 if (!(link->flags & IFF_LOOPBACK) &&
2056 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2057 r = link_drop_foreign_config(link);
2058 if (r < 0)
2059 return r;
2060 }
2061
d236718c
DS		 2062 /* The kernel resets ipv6 mtu after changing device mtu;
2063 * we must set this here, after we've set device mtu */
2064 r = link_set_ipv6_mtu(link);
2065 if (r < 0)
5e0534f1 2066 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2067
dad2d78e 2068 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 2069 r = link_acquire_conf(link);
2070 if (r < 0)
2071 return r;
cc544d5f 2072 }
1e9be60b 2073
3f265037 2074 return link_enter_join_netdev(link);
505f8da7
TG		 2075}
2076
572b21d9 2077static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2078 Network *network;
2079 int r;
2080
572b21d9
YW		 2081 if (m) {
2082 _cleanup_strv_free_ char **s = NULL;
2083
2084 r = sd_netlink_message_get_errno(m);
2085 if (r < 0)
2086 return r;
2087
2088 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2089 if (r < 0 && r != -ENODATA)
2090 return r;
2091
2092 strv_free_and_replace(link->alternative_names, s);
2093 }
2094
c643bda5
YW		 2095 r = network_get(link->manager, link->iftype, link->sd_device,
2096 link->ifname, link->alternative_names, link->driver,
2097 &link->mac, &link->permanent_mac,
2098 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2099 if (r == -ENOENT) {
2100 link_enter_unmanaged(link);
2101 return 0;
2102 } else if (r == 0 && network->unmanaged) {
2103 link_enter_unmanaged(link);
2104 return 0;
2105 } else if (r < 0)
2106 return r;
2107
99b8517c 2108 if (link->network == network && !force)
ad932b15
YW		 2109 return 0;
2110
2111 log_link_info(link, "Re-configuring with %s", network->filename);
2112
2113 /* Dropping old .network file */
2114 r = link_stop_clients(link, false);
572b21d9 2115 if (r < 0)
ad932b15 2116 return r;
ad932b15 2117
5ae0fb7f 2118 if (link->dhcp_server)
ad932b15
YW		 2119 (void) sd_dhcp_server_stop(link->dhcp_server);
2120
2121 r = link_drop_config(link);
2122 if (r < 0)
2123 return r;
2124
2c7b826d 2125 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2126 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2127 r = link_drop_foreign_config(link);
2128 if (r < 0)
2129 return r;
2130 }
2131
2132 link_free_carrier_maps(link);
2133 link_free_engines(link);
2134 link->network = network_unref(link->network);
2135
2136 /* Then, apply new .network file */
2137 r = network_apply(network, link);
2138 if (r < 0)
2139 return r;
2140
2141 r = link_new_carrier_maps(link);
2142 if (r < 0)
2143 return r;
2144
2145 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2146 link_dirty(link);
ad932b15
YW		 2147
2148 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2149 * link_configure() is called later asynchronously. */
2150 r = link_configure_duid(link);
2151 if (r <= 0)
2152 return r;
2153
2154 r = link_configure(link);
2155 if (r < 0)
2156 return r;
2157
2158 return 0;
2159}
2160
572b21d9
YW		 2161static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2162 int r;
2163
2164 r = link_reconfigure_internal(link, m, false);
2165 if (r < 0)
2166 link_enter_failed(link);
2167
2168 return 1;
2169}
2170
2171static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2172 int r;
2173
2174 r = link_reconfigure_internal(link, m, true);
2175 if (r < 0)
2176 link_enter_failed(link);
2177
2178 return 1;
2179}
2180
2181int link_reconfigure(Link *link, bool force) {
2182 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2183 int r;
2184
2c0d7ed3
YW		 2185 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2186 return 0;
2187
572b21d9
YW		 2188 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2189 link->ifindex);
2190 if (r < 0)
2191 return r;
2192
2193 r = netlink_call_async(link->manager->rtnl, NULL, req,
2194 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2195 link_netlink_destroy_callback, link);
2196 if (r < 0)
2197 return r;
2198
2199 link_ref(link);
2200
2201 return 0;
2202}
2203
e6bf7774 2204static int link_initialized_and_synced(Link *link) {
505f8da7 2205 Network *network;
505f8da7
TG		 2206 int r;
2207
2208 assert(link);
2209 assert(link->ifname);
2210 assert(link->manager);
2211
bd08ce56
YW		 2212 /* We may get called either from the asynchronous netlink callback,
2213 * or directly for link_add() if running in a container. See link_add(). */
2214 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2215 return 0;
505f8da7 2216
6a7a4e4d 2217 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2218 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2219
0d4ad91d
AR		 2220 r = link_new_bound_by_list(link);
2221 if (r < 0)
2222 return r;
2223
2224 r = link_handle_bound_by_list(link);
2225 if (r < 0)
2226 return r;
2227
c4a03a56 2228 if (!link->network) {
0894cfe4 2229 r = wifi_get_info(link);
8d968fdd
YW		 2230 if (r < 0)
2231 return r;
2232
c643bda5
YW		 2233 r = network_get(link->manager, link->iftype, link->sd_device,
2234 link->ifname, link->alternative_names, link->driver,
2235 &link->mac, &link->permanent_mac,
2236 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2237 if (r == -ENOENT) {
2238 link_enter_unmanaged(link);
4232cf04 2239 return 0;
a09dc546
DM		 2240 } else if (r == 0 && network->unmanaged) {
2241 link_enter_unmanaged(link);
2242 return 0;
c4a03a56
TG		 2243 } else if (r < 0)
2244 return r;
505f8da7 2245
c4a03a56
TG		 2246 if (link->flags & IFF_LOOPBACK) {
2247 if (network->link_local != ADDRESS_FAMILY_NO)
2248 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2249
c4a03a56
TG		 2250 if (network->dhcp != ADDRESS_FAMILY_NO)
2251 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2252
c4a03a56
TG		 2253 if (network->dhcp_server)
2254 log_link_debug(link, "Ignoring DHCP server for loopback link");
2255 }
bd2efe92 2256
7d342c03 2257 r = network_apply(network, link);
c4a03a56
TG		 2258 if (r < 0)
2259 return r;
2260 }
505f8da7 2261
0d4ad91d
AR		 2262 r = link_new_bound_to_list(link);
2263 if (r < 0)
2264 return r;
2265
27dfc982
YW		 2266 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2267 * link_configure() is called later asynchronously. */
2268 r = link_configure_duid(link);
2269 if (r <= 0)
2270 return r;
2271
a748b692
TG		 2272 r = link_configure(link);
2273 if (r < 0)
2274 return r;
2275
4232cf04 2276 return 0;
505f8da7
TG		 2277}
2278
302a796f 2279static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2280 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2281 int r;
2282
572b21d9
YW		 2283 r = sd_netlink_message_get_errno(m);
2284 if (r < 0) {
40681e5c 2285 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2286 link_enter_failed(link);
2287 return 0;
2288 }
2289
2290 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2291 if (r < 0 && r != -ENODATA) {
2292 link_enter_failed(link);
2293 return 0;
2294 }
2295
2296 strv_free_and_replace(link->alternative_names, s);
2297
4ff296b0
YW		 2298 r = link_initialized_and_synced(link);
2299 if (r < 0)
2300 link_enter_failed(link);
e6bf7774
YW		 2301 return 1;
2302}
2303
51517f9e 2304int link_initialized(Link *link, sd_device *device) {
4afd3348 2305 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2306 int r;
2307
2308 assert(link);
2309 assert(link->manager);
2310 assert(link->manager->rtnl);
2311 assert(device);
2312
8434fd5c 2313 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2314 return 0;
2315
51517f9e 2316 if (link->sd_device)
679b3605
TG		 2317 return 0;
2318
79008bdd 2319 log_link_debug(link, "udev initialized link");
bd08ce56 2320 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2321
51517f9e 2322 link->sd_device = sd_device_ref(device);
4f561e8e 2323
3c9b8860
TG		 2324 /* udev has initialized the link, but we don't know if we have yet
2325 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2326 * when it returns we know that the pending NEWLINKs have already been
2327 * processed and that we are up-to-date */
4f561e8e 2328
3c9b8860
TG		 2329 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2330 link->ifindex);
4f561e8e
TG		 2331 if (r < 0)
2332 return r;
2333
302a796f
YW		 2334 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2335 link_netlink_destroy_callback, link);
4f561e8e
TG		 2336 if (r < 0)
2337 return r;
2338
5da8149f
TG		 2339 link_ref(link);
2340
4f561e8e
TG		 2341 return 0;
2342}
2343
c4a03a56 2344static int link_load(Link *link) {
0bc70f1d
TG		 2345 _cleanup_free_ char *network_file = NULL,
2346 *addresses = NULL,
f703cc2c 2347 *routes = NULL,
0bc70f1d
TG		 2348 *dhcp4_address = NULL,
2349 *ipv4ll_address = NULL;
c4a03a56
TG		 2350 int r;
2351
2352 assert(link);
2353
aa8fbc74 2354 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2355 "NETWORK_FILE", &network_file,
2356 "ADDRESSES", &addresses,
f703cc2c 2357 "ROUTES", &routes,
0bc70f1d 2358 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2359 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2360 if (r < 0 && r != -ENOENT)
2361 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2362
2363 if (network_file) {
2364 Network *network;
2365 char *suffix;
2366
2367 /* drop suffix */
2368 suffix = strrchr(network_file, '.');
2369 if (!suffix) {
2370 log_link_debug(link, "Failed to get network name from %s", network_file);
2371 goto network_file_fail;
2372 }
2373 *suffix = '\0';
2374
2375 r = network_get_by_name(link->manager, basename(network_file), &network);
2376 if (r < 0) {
2377 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2378 goto network_file_fail;
2379 }
2380
7d342c03 2381 r = network_apply(network, link);
c4a03a56
TG		 2382 if (r < 0)
2383 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2384 }
2385
2386network_file_fail:
2387
da4d3a61
YW		 2388 r = link_deserialize_addresses(link, addresses);
2389 if (r < 0)
2390 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2391
731ff05b
YW		 2392 r = link_deserialize_routes(link, routes);
2393 if (r < 0)
2394 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2395
571eeba9
YW		 2396 r = link_deserialize_dhcp4(link, dhcp4_address);
2397 if (r < 0)
2398 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2399
daad60d1
YW		 2400 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2401 if (r < 0)
2402 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2403
c4a03a56
TG		 2404 return 0;
2405}
2406
1c4baffc 2407int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2408 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2409 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2410 Link *link;
5a937ea2 2411 int r;
505f8da7
TG		 2412
2413 assert(m);
fbbeb65a 2414 assert(m->rtnl);
505f8da7
TG		 2415 assert(message);
2416 assert(ret);
2417
2418 r = link_new(m, message, ret);
2419 if (r < 0)
2420 return r;
2421
2422 link = *ret;
2423
6a7a4e4d 2424 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2425
c4a03a56
TG		 2426 r = link_load(link);
2427 if (r < 0)
2428 return r;
2429
bf331d87
YW		 2430 if (path_is_read_only_fs("/sys") <= 0) {
2431 /* udev should be around */
ae06ab10 2432 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2433 r = sd_device_new_from_device_id(&device, ifindex_str);
2434 if (r < 0) {
4d59e14f
YW		 2435 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2436 return 0;
5c416fc4 2437 }
505f8da7 2438
5a937ea2 2439 r = sd_device_get_is_initialized(device);
51517f9e 2440 if (r < 0) {
bf331d87 2441 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2442 goto failed;
2443 }
5a937ea2 2444 if (r == 0) {
505f8da7 2445 /* not yet ready */
79008bdd 2446 log_link_debug(link, "link pending udev initialization...");
505f8da7 2447 return 0;
3c4cb064 2448 }
505f8da7 2449
299ad32d
YW		 2450 r = device_is_renaming(device);
2451 if (r < 0) {
bf331d87 2452 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2453 goto failed;
2454 }
2455 if (r > 0) {
bf331d87 2456 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2457 return 0;
2458 }
2459
4f561e8e
TG		 2460 r = link_initialized(link, device);
2461 if (r < 0)
5c416fc4 2462 goto failed;
4f561e8e 2463 } else {
e6bf7774 2464 r = link_initialized_and_synced(link);
4f561e8e 2465 if (r < 0)
5c416fc4 2466 goto failed;
4f561e8e 2467 }
505f8da7 2468
a748b692 2469 return 0;
5c416fc4
TG		 2470failed:
2471 link_enter_failed(link);
2472 return r;
a748b692
TG		 2473}
2474
c601ebf7 2475int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2476 int r;
2477
2478 assert(link);
2479
2480 log_link_info(link, "Gained IPv6LL");
2481
c601ebf7 2482 link->ipv6ll_address = *address;
e7ab854c
TG		 2483 link_check_ready(link);
2484
b9ea3d2e 2485 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2486 r = link_acquire_ipv6_conf(link);
2487 if (r < 0) {
2488 link_enter_failed(link);
2489 return r;
2490 }
2491 }
2492
2493 return 0;
2494}
2495
9c0a72f9
TG		 2496static int link_carrier_gained(Link *link) {
2497 int r;
2498
2499 assert(link);
2500
0894cfe4 2501 r = wifi_get_info(link);
8d968fdd
YW		 2502 if (r < 0)
2503 return r;
2504 if (r > 0) {
572b21d9
YW		 2505 r = link_reconfigure_internal(link, NULL, false);
2506 if (r < 0) {
2507 link_enter_failed(link);
8d968fdd 2508 return r;
572b21d9 2509 }
8d968fdd
YW		 2510 }
2511
b9ea3d2e 2512 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2513 r = link_acquire_conf(link);
2514 if (r < 0) {
2515 link_enter_failed(link);
2516 return r;
2517 }
6fc25497 2518
b425c3ae 2519 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2520 r = link_set_static_configs(link);
6fc25497
SS		 2521 if (r < 0)
2522 return r;
9c0a72f9
TG		 2523 }
2524
0d4ad91d
AR		 2525 r = link_handle_bound_by_list(link);
2526 if (r < 0)
2527 return r;
2528
1f241589
YW		 2529 if (!link->bridge_mdb_configured) {
2530 r = link_set_bridge_mdb(link);
2531 if (r < 0)
2532 return r;
2533 }
2534
2535 if (streq_ptr(link->kind, "bridge")) {
2536 Link *slave;
2537
2538 SET_FOREACH(slave, link->slaves) {
2539 if (slave->bridge_mdb_configured)
2540 continue;
2541
2542 r = link_set_bridge_mdb(slave);
2543 if (r < 0)
2544 link_enter_failed(slave);
2545 }
2546 }
3db468ea 2547
9c0a72f9
TG		 2548 return 0;
2549}
2550
2551static int link_carrier_lost(Link *link) {
2552 int r;
2553
2554 assert(link);
2555
25e992ba 2556 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2557 return 0;
2558
fbdb6605 2559 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2560 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2561 * configuration and stop the clients as well. */
97e7fb39
SS		 2562 if (link->setting_mtu)
2563 return 0;
2564
95355a28 2565 r = link_stop_clients(link, false);
9c0a72f9
TG		 2566 if (r < 0) {
2567 link_enter_failed(link);
2568 return r;
2569 }
2570
5ae0fb7f 2571 if (link->dhcp_server)
28464ae0 2572 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 2573
3104883d
SS		 2574 r = link_drop_config(link);
2575 if (r < 0)
2576 return r;
2577
2c7b826d 2578 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2579 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2580 r = link_drop_foreign_config(link);
2581 if (r < 0)
2582 return r;
2583 }
3104883d 2584
0d4ad91d
AR		 2585 r = link_handle_bound_by_list(link);
2586 if (r < 0)
2587 return r;
2588
9c0a72f9
TG		 2589 return 0;
2590}
2591
2592int link_carrier_reset(Link *link) {
2593 int r;
2594
2595 assert(link);
2596
2597 if (link_has_carrier(link)) {
2598 r = link_carrier_lost(link);
2599 if (r < 0)
2600 return r;
2601
2602 r = link_carrier_gained(link);
2603 if (r < 0)
2604 return r;
2605
6a7a4e4d 2606 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2607 }
2608
2609 return 0;
2610}
2611
d236718c
DS		 2612/* This is called every time an interface admin state changes to up;
2613 * specifically, when IFF_UP flag changes from unset to set */
2614static int link_admin_state_up(Link *link) {
2615 int r;
2616
2617 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2618 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2619 * ipv6_mtu_set prevents this from trying to set it too early before
2620 * the link->network has been setup; we only need to reset it
2621 * here if we've already set it during normal initialization. */
2622 if (link->ipv6_mtu_set) {
2623 r = link_set_ipv6_mtu(link);
2624 if (r < 0)
2625 return r;
2626 }
2627
2628 return 0;
2629}
2630
1c4baffc 2631int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2632 _cleanup_strv_free_ char **s = NULL;
c49b33ac 2633 struct ether_addr mac;
ca4e095a 2634 const char *ifname;
afe7fd56 2635 uint32_t mtu;
d236718c 2636 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2637 int old_master, r;
22936833 2638
dd3efc09 2639 assert(link);
b8941f74 2640 assert(link->ifname);
22936833
TG		 2641 assert(m);
2642
7619683b 2643 if (link->state == LINK_STATE_LINGER) {
5238e957 2644 log_link_info(link, "Link re-added");
289e6774 2645 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2646
2647 r = link_new_carrier_maps(link);
2648 if (r < 0)
2649 return r;
7619683b
TG		 2650 }
2651
1c4baffc 2652 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2653 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2654 Manager *manager = link->manager;
b8941f74 2655
30de2b89 2656 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2657
30de2b89
YW		 2658 link_drop(link);
2659 r = link_add(manager, m, &link);
2660 if (r < 0)
2661 return r;
b8941f74
TG		 2662 }
2663
572b21d9
YW		 2664 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2665 if (r >= 0)
2666 strv_free_and_replace(link->alternative_names, s);
2667
1c4baffc 2668 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2669 if (r >= 0 && mtu > 0) {
2670 link->mtu = mtu;
4e964aa0 2671 if (link->original_mtu == 0) {
afe7fd56 2672 link->original_mtu = mtu;
6a7a4e4d 2673 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2674 }
2675
2676 if (link->dhcp_client) {
3c9b8860
TG		 2677 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2678 link->mtu);
fc95c359
YW		 2679 if (r < 0)
2680 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2681 }
7465dd22
PF		 2682
2683 if (link->radv) {
2684 r = sd_radv_set_mtu(link->radv, link->mtu);
2685 if (r < 0)
2686 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2687 }
9842de0d 2688 }
69629de9 2689
e9189a1f
TG		 2690 /* The kernel may broadcast NEWLINK messages without the MAC address
2691 set, simply ignore them. */
1c4baffc 2692 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 2693 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
2694
2695 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
2696
2697 log_link_debug(link, "Gained new MAC address: "
2698 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2699 mac.ether_addr_octet[0],
2700 mac.ether_addr_octet[1],
2701 mac.ether_addr_octet[2],
2702 mac.ether_addr_octet[3],
2703 mac.ether_addr_octet[4],
2704 mac.ether_addr_octet[5]);
2705
a3adb4a6
YW		 2706 r = ipv4ll_update_mac(link);
2707 if (r < 0)
2708 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2709
d947f7f9
YW		 2710 r = dhcp4_update_mac(link);
2711 if (r < 0)
2712 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2713
eebba6dc
YW		 2714 r = dhcp6_update_mac(link);
2715 if (r < 0)
2716 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2717
be9363cc
YW		 2718 r = dhcp6_update_mac(link);
2719 if (r < 0)
2720 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2721
2722 if (link->ndisc) {
2723 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
2724 if (r < 0)
2725 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2726 }
4f882b2a
TG		 2727 }
2728
bb262ef0
YW		 2729 old_master = link->master_ifindex;
2730 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2731
d236718c 2732 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2733 had_carrier = link_has_carrier(link);
2734
bb262ef0 2735 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2736 if (r < 0)
2737 return r;
2738
d236718c
DS		 2739 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2740 log_link_info(link, "Link UP");
2741
2742 r = link_admin_state_up(link);
2743 if (r < 0)
2744 return r;
2745 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2746 log_link_info(link, "Link DOWN");
2747
273eec24
LP		 2748 r = link_update_lldp(link);
2749 if (r < 0)
2750 return r;
2751
a61bb41c
TG		 2752 carrier_gained = !had_carrier && link_has_carrier(link);
2753 carrier_lost = had_carrier && !link_has_carrier(link);
2754
2755 if (carrier_gained) {
6a7a4e4d 2756 log_link_info(link, "Gained carrier");
a61bb41c 2757
9c0a72f9
TG		 2758 r = link_carrier_gained(link);
2759 if (r < 0)
2760 return r;
a61bb41c 2761 } else if (carrier_lost) {
6a7a4e4d 2762 log_link_info(link, "Lost carrier");
a61bb41c 2763
9c0a72f9
TG		 2764 r = link_carrier_lost(link);
2765 if (r < 0)
a61bb41c 2766 return r;
a61bb41c
TG		 2767 }
2768
2769 return 0;
dd3efc09 2770}
fe8db0c5 2771
b295beea
LP		 2772static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2773 bool space = false;
b295beea
LP		 2774 Link *link;
2775
2776 assert(f);
2777 assert(prefix);
2778
2779 if (hashmap_isempty(h))
2780 return;
2781
0d536673 2782 fputs(prefix, f);
90e74a66 2783 HASHMAP_FOREACH(link, h) {
b295beea 2784 if (space)
0d536673 2785 fputc(' ', f);
b295beea
LP		 2786
2787 fprintf(f, "%i", link->ifindex);
2788 space = true;
2789 }
2790
0d536673 2791 fputc('\n', f);
b295beea
LP		 2792}
2793
64581765 2794static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2795 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2796 const char *str;
15761549 2797
64581765
YW		 2798 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2799 continue;
2800
e77bd3fd
YW		 2801 str = in_addr_full_to_string(dns[j]);
2802 if (!str)
15761549 2803 continue;
15761549
YW		 2804
2805 if (*space)
2806 fputc(' ', f);
e77bd3fd 2807 fputs(str, f);
15761549
YW		 2808 *space = true;
2809 }
2810}
2811
d5e172d2
ZJS		 2812static void serialize_addresses(
2813 FILE *f,
2814 const char *lvalue,
2815 bool *space,
2816 char **addresses,
2817 sd_dhcp_lease *lease,
2818 bool conditional,
ddb82ec2 2819 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2820 sd_dhcp6_lease *lease6,
2821 bool conditional6,
2822 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2823 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2824 int r;
2825
2826 bool _space = false;
2827 if (!space)
2828 space = &_space;
2829
2830 if (lvalue)
2831 fprintf(f, "%s=", lvalue);
2832 fputstrv(f, addresses, NULL, space);
2833
2834 if (lease && conditional) {
2835 const struct in_addr *lease_addresses;
2836
2837 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2838 if (r > 0)
d8bff5cc 2839 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2840 }
2841
2842 if (lease6 && conditional6 && lease6_get_addr) {
2843 const struct in6_addr *in6_addrs;
2844
2845 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2846 if (r > 0)
2847 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2848 }
2849
2850 if (lease6 && conditional6 && lease6_get_fqdn) {
2851 char **in6_hosts;
2852
2853 r = lease6_get_fqdn(lease6, &in6_hosts);
2854 if (r > 0)
2855 fputstrv(f, in6_hosts, NULL, space);
2856 }
2857
2858 if (lvalue)
2859 fputc('\n', f);
2860}
2861
fe8db0c5 2862int link_save(Link *link) {
d361b373 2863 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2864 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2865 _cleanup_fclose_ FILE *f = NULL;
2866 int r;
2867
2868 assert(link);
2869 assert(link->state_file);
68a8723c 2870 assert(link->lease_file);
bbf7c048
TG		 2871 assert(link->manager);
2872
370e9930 2873 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2874 (void) unlink(link->state_file);
370e9930
TG		 2875 return 0;
2876 }
2877
34437b4f
LP		 2878 link_lldp_save(link);
2879
deb2e523
TG		 2880 admin_state = link_state_to_string(link->state);
2881 assert(admin_state);
2882
e375dcde
TG		 2883 oper_state = link_operstate_to_string(link->operstate);
2884 assert(oper_state);
deb2e523 2885
ac999bf0
YW		 2886 carrier_state = link_carrier_state_to_string(link->carrier_state);
2887 assert(carrier_state);
2888
2889 address_state = link_address_state_to_string(link->address_state);
2890 assert(address_state);
2891
fe8db0c5
TG		 2892 r = fopen_temporary(link->state_file, &f, &temp_path);
2893 if (r < 0)
6a7a4e4d 2894 goto fail;
fe8db0c5 2895
5512a963 2896 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2897
2898 fprintf(f,
2899 "# This is private data. Do not parse.\n"
deb2e523 2900 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2901 "OPER_STATE=%s\n"
2902 "CARRIER_STATE=%s\n"
2903 "ADDRESS_STATE=%s\n",
2904 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2905
bcb7a07e 2906 if (link->network) {
fe0e16db
YW		 2907 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2908 const char *dhcp_domainname = NULL, *p;
fe0e16db 2909 bool space;
07bdc70d 2910
c1a38904
MTL		 2911 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2912 yes_no(link->network->required_for_online));
2913
d5e172d2
ZJS		 2914 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2915 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2916 strempty(link_operstate_to_string(st.min)),
2917 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2918 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2919
adc5b2e2
TG		 2920 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2921
d5e172d2
ZJS		 2922 /************************************************************/
2923
0d536673 2924 fputs("DNS=", f);
ea352b40 2925 space = false;
15761549 2926 if (link->n_dns != (unsigned) -1)
64581765 2927 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2928 else
64581765 2929 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2930
d5e172d2
ZJS		 2931 serialize_addresses(f, NULL, &space,
2932 NULL,
2933 link->dhcp_lease,
2934 link->network->dhcp_use_dns,
ddb82ec2 2935 SD_DHCP_LEASE_DNS,
1633c457 2936 link->dhcp6_lease,
d5e172d2
ZJS		 2937 link->network->dhcp6_use_dns,
2938 sd_dhcp6_lease_get_dns,
2939 NULL);
1e7a0e21 2940
a8c10331 2941 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2942 ndisc_vacuum(link);
2943
b296797f 2944 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2945 NDiscRDNSS *dd;
2946
90e74a66 2947 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2948 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2949 }
2950
2951 fputc('\n', f);
2952
d5e172d2
ZJS		 2953 /************************************************************/
2954
2955 serialize_addresses(f, "NTP", NULL,
2956 link->ntp ?: link->network->ntp,
2957 link->dhcp_lease,
2958 link->network->dhcp_use_ntp,
ddb82ec2 2959 SD_DHCP_LEASE_NTP,
1633c457 2960 link->dhcp6_lease,
d5e172d2
ZJS		 2961 link->network->dhcp6_use_ntp,
2962 sd_dhcp6_lease_get_ntp_addrs,
2963 sd_dhcp6_lease_get_ntp_fqdn);
2964
2965 serialize_addresses(f, "SIP", NULL,
2a71d57f 2966 NULL,
d5e172d2
ZJS		 2967 link->dhcp_lease,
2968 link->network->dhcp_use_sip,
ddb82ec2 2969 SD_DHCP_LEASE_SIP,
2a71d57f 2970 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2971
2972 /************************************************************/
bd8f6538 2973
b2a81c0b 2974 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2975 if (link->dhcp_lease) {
b2a81c0b 2976 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2977 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2978 }
1633c457
YW		 2979 if (link->dhcp6_lease)
2980 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2981 }
2982
fe0e16db
YW		 2983 fputs("DOMAINS=", f);
2984 space = false;
90e74a66 2985 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2986 fputs_with_space(f, p, NULL, &space);
07bdc70d 2987
1e7a0e21 2988 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 2989 if (dhcp_domainname)
2990 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2991 if (dhcp_domains)
2992 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2993 if (dhcp6_domains)
2994 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2995 }
2996
2997 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
2998 NDiscDNSSL *dd;
1e7a0e21 2999
90e74a66 3000 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3001 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3002 }
b2a81c0b 3003
0d536673 3004 fputc('\n', f);
6192b846 3005
d5e172d2
ZJS		 3006 /************************************************************/
3007
fe0e16db
YW		 3008 fputs("ROUTE_DOMAINS=", f);
3009 space = false;
90e74a66 3010 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3011 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3012
1e7a0e21 3013 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3014 if (dhcp_domainname)
3015 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3016 if (dhcp_domains)
3017 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3018 if (dhcp6_domains)
3019 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3020 }
3021
3022 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3023 NDiscDNSSL *dd;
1e7a0e21 3024
90e74a66 3025 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3026 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3027 }
b2a81c0b 3028
0d536673 3029 fputc('\n', f);
67272d15 3030
d5e172d2
ZJS		 3031 /************************************************************/
3032
3c9b8860 3033 fprintf(f, "LLMNR=%s\n",
15761549 3034 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3035
3036 /************************************************************/
3037
aaa297d4 3038 fprintf(f, "MDNS=%s\n",
15761549 3039 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3040
d5e172d2
ZJS		 3041 /************************************************************/
3042
3043 int dns_default_route =
3044 link->dns_default_route >= 0 ? link->dns_default_route :
3045 link->network->dns_default_route;
3046 if (dns_default_route >= 0)
3047 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3048
3049 /************************************************************/
3050
3051 DnsOverTlsMode dns_over_tls_mode =
3052 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3053 link->network->dns_over_tls_mode;
3054 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3055 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3056
3057 /************************************************************/
3058
3059 DnssecMode dnssec_mode =
3060 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3061 link->network->dnssec_mode;
3062 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3063 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3064
3065 /************************************************************/
3066
3067 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3068 if (set_isempty(nta_anchors))
3069 nta_anchors = link->network->dnssec_negative_trust_anchors;
3070
3071 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3072 const char *n;
3073
0d536673 3074 fputs("DNSSEC_NTA=", f);
8a516214 3075 space = false;
90e74a66 3076 SET_FOREACH(n, nta_anchors)
d390f8ef 3077 fputs_with_space(f, n, NULL, &space);
0d536673 3078 fputc('\n', f);
8a516214
LP		 3079 }
3080
d5e172d2
ZJS		 3081 /************************************************************/
3082
3b31e2b7
YW		 3083 r = link_serialize_addresses(link, f);
3084 if (r < 0)
3085 goto fail;
c1eb9872 3086
d5e172d2
ZJS		 3087 /************************************************************/
3088
56519412
YW		 3089 r = link_serialize_routes(link, f);
3090 if (r < 0)
3091 goto fail;
bcb7a07e 3092 }
7374f9d8 3093
b295beea
LP		 3094 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3095 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3096
8eb9058d 3097 if (link->dhcp_lease) {
bd91b83e 3098 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3099 if (r < 0)
c2d6bd61 3100 goto fail;
fe8db0c5 3101
7374f9d8 3102 fprintf(f,
b0e39c82
TG		 3103 "DHCP_LEASE=%s\n",
3104 link->lease_file);
deb2e523 3105 } else
6990fb6b 3106 (void) unlink(link->lease_file);
fe8db0c5 3107
ca21a19a
YW		 3108 r = link_serialize_ipv4ll(link, f);
3109 if (r < 0)
3110 goto fail;
0bc70f1d 3111
5460bde5
YW		 3112 r = link_serialize_dhcp6_client(link, f);
3113 if (r < 0)
3114 goto fail;
18d8a2cf 3115
c2d6bd61
LP		 3116 r = fflush_and_check(f);
3117 if (r < 0)
3118 goto fail;
fe8db0c5 3119
c2d6bd61 3120 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3121 r = -errno;
c2d6bd61 3122 goto fail;
fe8db0c5
TG		 3123 }
3124
c2d6bd61 3125 return 0;
dacd6cee 3126
c2d6bd61 3127fail:
6a7a4e4d 3128 (void) unlink(link->state_file);
6a7a4e4d
LP		 3129 if (temp_path)
3130 (void) unlink(temp_path);
3131
dacd6cee 3132 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3133}
3134
84de38c5
TG		 3135/* The serialized state in /run is no longer up-to-date. */
3136void link_dirty(Link *link) {
3137 int r;
3138
3139 assert(link);
3140
0c241a37
SS		 3141 /* mark manager dirty as link is dirty */
3142 manager_dirty(link->manager);
3143
de7fef4b 3144 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3145 if (r <= 0)
de7fef4b 3146 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3147 return;
84de38c5
TG		 3148 link_ref(link);
3149}
3150
3151/* The serialized state in /run is up-to-date */
3152void link_clean(Link *link) {
3153 assert(link);
3154 assert(link->manager);
3155
1046bf9b 3156 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3157}
3158
c2a65950
YW		 3159int link_save_and_clean(Link *link) {
3160 int r;
3161
3162 r = link_save(link);
3163 if (r < 0)
3164 return r;
3165
3166 link_clean(link);
3167 return 0;
3168}
3169
fe8db0c5 3170static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3171 [LINK_STATE_PENDING] = "pending",
bd08ce56 3172 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3173 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3174 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3175 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3176 [LINK_STATE_FAILED] = "failed",
370e9930 3177 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3178};
3179
3180DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3181
3182int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3183 const char *err_msg = NULL;
3184
3185 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3186 return log_link_full_errno(link, level, err,
3187 "%s: %s%s%s%m",
3188 msg,
3189 strempty(err_msg),
3190 err_msg && !endswith(err_msg, ".") ? "." : "",
3191 err_msg ? " " : "");
5ecb131d 3192}
Unnamed repository; edit this file 'description' to name the repository.