]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: move link_lldp_emit_stop() to link_free_engines()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
093e3533 24#include "networkd-address.h"
3ddcbeea 25#include "networkd-can.h"
8fcf1d61 26#include "networkd-dhcp-server.h"
ca5ad760
YW		 27#include "networkd-dhcp4.h"
28#include "networkd-dhcp6.h"
ee446d57 29#include "networkd-fdb.h"
ca5ad760 30#include "networkd-ipv4ll.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 32#include "networkd-link-bus.h"
33#include "networkd-link.h"
8e1ad1ea 34#include "networkd-lldp-tx.h"
23f53b99 35#include "networkd-manager.h"
dbf63196 36#include "networkd-mdb.h"
1e7a0e21 37#include "networkd-ndisc.h"
e4a71bf3 38#include "networkd-neighbor.h"
75156ccb 39#include "networkd-nexthop.h"
518cd6b5 40#include "networkd-sriov.h"
5e0534f1 41#include "networkd-sysctl.h"
7465dd22 42#include "networkd-radv.h"
bce67bbe 43#include "networkd-routing-policy-rule.h"
8d968fdd 44#include "networkd-wifi.h"
cf1d700d
TG		 45#include "set.h"
46#include "socket-util.h"
bf331d87 47#include "stat-util.h"
15a5e950 48#include "stdio-util.h"
8b43440b 49#include "string-table.h"
51517f9e 50#include "strv.h"
62e021a9 51#include "sysctl-util.h"
34658df2 52#include "tc.h"
e4de7287 53#include "tmpfile-util.h"
299ad32d 54#include "udev-util.h"
cf1d700d 55#include "util.h"
737f1405 56#include "vrf.h"
fc2f9534 57
2d792895 58bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 59 assert(link);
910feb78 60 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 61
78c958f8
TG		 62 if (link->flags & IFF_LOOPBACK)
63 return false;
64
65 if (!link->network)
66 return false;
67
500b96eb 68 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 69 return false;
70
98d20a17 71 if (STRPTR_IN_SET(link->kind,
72 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 73 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 74 return false;
75
f410d463
YW		 76 /* L3 or L3S mode do not support ARP. */
77 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
78 return false;
79
f2bfcdb9
YW		 80 if (link->network->bond)
81 return false;
82
910feb78 83 return link->network->link_local & mask;
8bc17bb3
SS		 84}
85
f8f2f880 86bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 87 assert(link);
88
fa709992
LP		 89 if (!socket_ipv6_is_supported())
90 return false;
91
d0d6a4cd
TG		 92 if (link->flags & IFF_LOOPBACK)
93 return false;
94
95 if (!link->network)
96 return false;
97
500b96eb 98 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 99 return false;
100
101 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 102 return false;
103
f2bfcdb9
YW		 104 if (link->network->bond)
105 return false;
106
e0ee46f2 107 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 108}
109
5e0534f1 110bool link_ipv6_enabled(Link *link) {
439689c6
SS		 111 assert(link);
112
113 if (!socket_ipv6_is_supported())
114 return false;
115
b102cdca 116 if (link->network->bond)
2b00a4e0
TY		 117 return false;
118
500b96eb 119 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 120 return false;
121
4cef7fe3 122 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 123 if (link_ipv6ll_enabled(link))
124 return true;
125
126 if (network_has_static_ipv6_configurations(link->network))
127 return true;
128
129 return false;
439689c6
SS		 130}
131
34bf3c00
YW		 132static bool link_is_enslaved(Link *link) {
133 if (link->flags & IFF_SLAVE)
134 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
135 return true;
136
34bf3c00
YW		 137 if (!link->network)
138 return false;
139
bb262ef0 140 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 141 return true;
142
bb262ef0
YW		 143 /* TODO: add conditions for other netdevs. */
144
34bf3c00
YW		 145 return false;
146}
147
45e11abf
YW		 148static void link_update_master_operstate(Link *link, NetDev *netdev) {
149 Link *master;
150
151 if (!netdev)
152 return;
153
7936917e
YW		 154 if (netdev->ifindex <= 0)
155 return;
156
45e11abf
YW		 157 if (link_get(link->manager, netdev->ifindex, &master) < 0)
158 return;
159
160 link_update_operstate(master, true);
161}
162
163void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 164 LinkOperationalState operstate;
1678fbb3
YW		 165 LinkCarrierState carrier_state;
166 LinkAddressState address_state;
35c5a9ca 167 _cleanup_strv_free_ char **p = NULL;
1678fbb3 168 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 169 bool changed = false;
1678fbb3 170 Address *address;
14153d1b 171
84de38c5
TG		 172 assert(link);
173
174 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 175 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 176 else if (link_has_carrier(link)) {
1678fbb3
YW		 177 if (link_is_enslaved(link))
178 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 179 else
1678fbb3 180 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 181 } else if (link->flags & IFF_UP)
1678fbb3 182 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 183 else
1678fbb3 184 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 185
1678fbb3 186 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 187 Link *slave;
188
90e74a66 189 SET_FOREACH(slave, link->slaves) {
959f65d3 190 link_update_operstate(slave, false);
84de38c5 191
1678fbb3
YW		 192 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
193 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 194 }
959f65d3 195 }
84de38c5 196
90e74a66 197 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 198 if (!address_is_ready(address))
199 continue;
84de38c5 200
1678fbb3
YW		 201 if (address->scope < scope)
202 scope = address->scope;
203 }
84de38c5 204
1678fbb3 205 /* for operstate we also take foreign addresses into account */
90e74a66 206 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 207 if (!address_is_ready(address))
208 continue;
209
210 if (address->scope < scope)
211 scope = address->scope;
212 }
213
214 if (scope < RT_SCOPE_SITE)
215 /* universally accessible addresses found */
216 address_state = LINK_ADDRESS_STATE_ROUTABLE;
217 else if (scope < RT_SCOPE_HOST)
218 /* only link or site local addresses found */
219 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 220 else
1678fbb3
YW		 221 /* no useful addresses found */
222 address_state = LINK_ADDRESS_STATE_OFF;
223
224 /* Mapping of address and carrier state vs operational state
225 * carrier state
226 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
227 * ------------------------------------------------------------------------------
228 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
229 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
230 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
231 */
84de38c5 232
1678fbb3
YW		 233 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
234 operstate = (LinkOperationalState) carrier_state;
235 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
236 operstate = LINK_OPERSTATE_ROUTABLE;
237 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
238 operstate = LINK_OPERSTATE_DEGRADED;
239 else
14153d1b
YW		 240 operstate = LINK_OPERSTATE_ENSLAVED;
241
35c5a9ca
YW		 242 if (link->carrier_state != carrier_state) {
243 link->carrier_state = carrier_state;
244 changed = true;
245 if (strv_extend(&p, "CarrierState") < 0)
246 log_oom();
247 }
959f65d3 248
35c5a9ca
YW		 249 if (link->address_state != address_state) {
250 link->address_state = address_state;
251 changed = true;
252 if (strv_extend(&p, "AddressState") < 0)
253 log_oom();
959f65d3
YW		 254 }
255
84de38c5
TG		 256 if (link->operstate != operstate) {
257 link->operstate = operstate;
35c5a9ca
YW		 258 changed = true;
259 if (strv_extend(&p, "OperationalState") < 0)
260 log_oom();
84de38c5 261 }
959f65d3 262
35c5a9ca
YW		 263 if (p)
264 link_send_changed_strv(link, p);
265 if (changed)
266 link_dirty(link);
267
45e11abf
YW		 268 if (also_update_master && link->network) {
269 link_update_master_operstate(link, link->network->bond);
270 link_update_master_operstate(link, link->network->bridge);
959f65d3 271 }
84de38c5
TG		 272}
273
51d18171
TG		 274#define FLAG_STRING(string, flag, old, new) \
275 (((old ^ new) & flag) \
276 ? ((old & flag) ? (" -" string) : (" +" string)) \
277 : "")
278
bb262ef0 279static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 280 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
281 uint8_t operstate;
282 int r;
283
284 assert(link);
285
286 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 287 if (r < 0)
288 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 289
1c4baffc 290 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 291 if (r < 0)
292 /* if we got a message without operstate, take it to mean
293 the state was unchanged */
294 operstate = link->kernel_operstate;
295
bb262ef0 296 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 297 return 0;
298
299 if (link->flags != flags) {
6a7a4e4d 300 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 301 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
302 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
303 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
304 FLAG_STRING("UP", IFF_UP, link->flags, flags),
305 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
306 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
307 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
308 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
309 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
310 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
311 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
312 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
313 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
314 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
315 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
316 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
317 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
318 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
319 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
320
321 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
322 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
323 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
324 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
325 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
326 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
327 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
328 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
329
330 /* link flags are currently at most 18 bits, let's align to
331 * printing 20 */
332 if (unknown_flags_added)
79008bdd 333 log_link_debug(link,
6a7a4e4d 334 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 335 unknown_flags_added);
336
337 if (unknown_flags_removed)
79008bdd 338 log_link_debug(link,
6a7a4e4d 339 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 340 unknown_flags_removed);
341 }
342
343 link->flags = flags;
344 link->kernel_operstate = operstate;
345
959f65d3 346 link_update_operstate(link, true);
51d18171
TG		 347
348 return 0;
349}
350
1c4baffc 351static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 352 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 353 const char *ifname, *kind = NULL;
b710e6b6 354 unsigned short iftype;
572b21d9
YW		 355 int r, ifindex;
356 uint16_t type;
f579559b 357
0c2f9b84 358 assert(manager);
505f8da7 359 assert(message);
f579559b
TG		 360 assert(ret);
361
6cad256d
TJ		 362 /* check for link kind */
363 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
364 if (r == 0) {
db2f8a2e 365 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 366 r = sd_netlink_message_exit_container(message);
367 if (r < 0)
368 return r;
369 }
370
1c4baffc 371 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 372 if (r < 0)
373 return r;
374 else if (type != RTM_NEWLINK)
375 return -EINVAL;
376
377 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
378 if (r < 0)
379 return r;
380 else if (ifindex <= 0)
381 return -EINVAL;
382
b710e6b6
LP		 383 r = sd_rtnl_message_link_get_type(message, &iftype);
384 if (r < 0)
385 return r;
386
1c4baffc 387 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 388 if (r < 0)
389 return r;
390
17f9c355 391 link = new(Link, 1);
f579559b
TG		 392 if (!link)
393 return -ENOMEM;
394
17f9c355
YW		 395 *link = (Link) {
396 .n_ref = 1,
397 .manager = manager,
398 .state = LINK_STATE_PENDING,
17f9c355
YW		 399 .ifindex = ifindex,
400 .iftype = iftype,
15761549
YW		 401
402 .n_dns = (unsigned) -1,
403 .dns_default_route = -1,
404 .llmnr = _RESOLVE_SUPPORT_INVALID,
405 .mdns = _RESOLVE_SUPPORT_INVALID,
406 .dnssec_mode = _DNSSEC_MODE_INVALID,
407 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 408 };
409
505f8da7
TG		 410 link->ifname = strdup(ifname);
411 if (!link->ifname)
412 return -ENOMEM;
f579559b 413
6cad256d
TJ		 414 if (kind) {
415 link->kind = strdup(kind);
416 if (!link->kind)
417 return -ENOMEM;
418 }
419
cbff7170
TJ		 420 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
421 if (r < 0)
422 log_link_debug_errno(link, r, "New device has no master, continuing without");
423
1c4baffc 424 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 425 if (r < 0)
34437b4f 426 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 427
c643bda5 428 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 429 if (r < 0)
430 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
431
c643bda5
YW		 432 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
433 if (r < 0)
434 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
435
572b21d9
YW		 436 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
437 if (r < 0 && r != -ENODATA)
438 return r;
439
34437b4f 440 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 441 return -ENOMEM;
fe8db0c5 442
34437b4f 443 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 444 return -ENOMEM;
445
34437b4f 446 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 447 return -ENOMEM;
448
d5099efc 449 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 450 if (r < 0)
451 return r;
452
453 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 454 if (r < 0)
455 return r;
456
bb262ef0 457 r = link_update_flags(link, message, false);
51d18171
TG		 458 if (r < 0)
459 return r;
460
1cc6c93a 461 *ret = TAKE_PTR(link);
f579559b
TG		 462
463 return 0;
464}
465
15761549
YW		 466void link_ntp_settings_clear(Link *link) {
467 link->ntp = strv_free(link->ntp);
468}
469
470void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 471 if (link->n_dns != (unsigned) -1)
472 for (unsigned i = 0; i < link->n_dns; i++)
473 in_addr_full_free(link->dns[i]);
15761549
YW		 474 link->dns = mfree(link->dns);
475 link->n_dns = (unsigned) -1;
476
477 link->search_domains = ordered_set_free_free(link->search_domains);
478 link->route_domains = ordered_set_free_free(link->route_domains);
479
480 link->dns_default_route = -1;
481 link->llmnr = _RESOLVE_SUPPORT_INVALID;
482 link->mdns = _RESOLVE_SUPPORT_INVALID;
483 link->dnssec_mode = _DNSSEC_MODE_INVALID;
484 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
485
486 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
487}
488
1a6bb31f
YW		 489static void link_free_engines(Link *link) {
490 if (!link)
491 return;
492
493 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
494 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
495 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 496 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 497
498 link->lldp = sd_lldp_unref(link->lldp);
1c494872 499 link_lldp_emit_stop(link);
1a6bb31f
YW		 500
501 ndisc_flush(link);
502
503 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
504 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 505 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 506 link->ndisc = sd_ndisc_unref(link->ndisc);
507 link->radv = sd_radv_unref(link->radv);
508}
509
8301aa0b 510static Link *link_free(Link *link) {
8301aa0b 511 assert(link);
f579559b 512
15761549
YW		 513 link_ntp_settings_clear(link);
514 link_dns_settings_clear(link);
515
8eec0b9d
YW		 516 link->routes = set_free(link->routes);
517 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 518 link->dhcp_routes = set_free(link->dhcp_routes);
519 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 520 link->dhcp6_routes = set_free(link->dhcp6_routes);
521 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
522 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
523 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 524 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 525
8eec0b9d
YW		 526 link->nexthops = set_free(link->nexthops);
527 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 528
8eec0b9d
YW		 529 link->neighbors = set_free(link->neighbors);
530 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 531
8eec0b9d
YW		 532 link->addresses = set_free(link->addresses);
533 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 534 link->pool_addresses = set_free(link->pool_addresses);
e5526518 535 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 536 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
537 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
538 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
539 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 540 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 541
1a6bb31f 542 link_free_engines(link);
68a8723c 543 free(link->lease_file);
49699bac
SS		 544 free(link->lldp_file);
545
c166a070 546 free(link->ifname);
572b21d9 547 strv_free(link->alternative_names);
ceac4078 548 free(link->kind);
8d968fdd 549 free(link->ssid);
c643bda5 550 free(link->driver);
6cad256d 551
db2f8a2e 552 (void) unlink(link->state_file);
fe8db0c5 553 free(link->state_file);
c166a070 554
51517f9e 555 sd_device_unref(link->sd_device);
b5db00e5 556
0d4ad91d 557 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 558 hashmap_free(link->bound_by_links);
559
5f707e12 560 set_free_with_destructor(link->slaves, link_unref);
033295c1 561
c9c908a6
YW		 562 network_unref(link->network);
563
8301aa0b 564 return mfree(link);
14b746f7
TG		 565}
566
8301aa0b 567DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 568
11a7f229
TG		 569int link_get(Manager *m, int ifindex, Link **ret) {
570 Link *link;
11a7f229
TG		 571
572 assert(m);
e856ed00 573 assert(ifindex > 0);
11a7f229
TG		 574 assert(ret);
575
ae06ab10 576 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 577 if (!link)
578 return -ENODEV;
579
580 *ret = link;
581
582 return 0;
583}
584
af9ba57a 585void link_set_state(Link *link, LinkState state) {
e331e246
TG		 586 assert(link);
587
588 if (link->state == state)
589 return;
590
0beb9542
YW		 591 log_link_debug(link, "State changed: %s -> %s",
592 link_state_to_string(link->state),
593 link_state_to_string(state));
594
e331e246
TG		 595 link->state = state;
596
597 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 598}
599
57bd6899
TG		 600static void link_enter_unmanaged(Link *link) {
601 assert(link);
602
e331e246 603 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 604
84de38c5 605 link_dirty(link);
57bd6899
TG		 606}
607
2a99eed0 608int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 609 int r = 0, k;
610
611 assert(link);
612 assert(link->manager);
613 assert(link->manager->event);
614
80060352
ZJS		 615 bool keep_dhcp = may_keep_dhcp &&
616 link->network &&
617 (link->manager->restarting ||
618 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
619
84add3cd 620 if (!keep_dhcp) {
111bb8f9 621 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 622 if (k < 0)
36c7d709 623 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 624 }
625
84add3cd
YW		 626 k = sd_ipv4acd_stop(link->dhcp_acd);
627 if (k < 0)
628 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 629
2a99eed0
YW		 630 k = sd_dhcp_server_stop(link->dhcp_server);
631 if (k < 0)
632 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
633
9cc65242
YW		 634 k = sd_lldp_stop(link->lldp);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
637
84add3cd
YW		 638 k = sd_ipv4ll_stop(link->ipv4ll);
639 if (k < 0)
640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 641
490ccbd5 642 k = ipv4_dad_stop(link);
2488e4d9
YW		 643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 645
84add3cd
YW		 646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 649
2ffd6d73
YW		 650 k = dhcp6_pd_remove(link);
651 if (k < 0)
652 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 653
84add3cd
YW		 654 k = sd_ndisc_stop(link->ndisc);
655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 657
84add3cd
YW		 658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 661
7272b25e 662 link_lldp_emit_stop(link);
111bb8f9
TG		 663 return r;
664}
665
b22d8a00 666void link_enter_failed(Link *link) {
ef1ba606 667 assert(link);
f882c247 668
370e9930 669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 670 return;
671
6a7a4e4d 672 log_link_warning(link, "Failed");
449f7554 673
e331e246 674 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 675
2a99eed0 676 (void) link_stop_engines(link, false);
111bb8f9 677
84de38c5 678 link_dirty(link);
f882c247
TG		 679}
680
7033af49
YW		 681static int link_join_netdevs_after_configured(Link *link) {
682 NetDev *netdev;
7033af49
YW		 683 int r;
684
90e74a66 685 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 686 if (netdev->ifindex > 0)
687 /* Assume already enslaved. */
688 continue;
689
690 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
691 continue;
692
693 log_struct(LOG_DEBUG,
694 LOG_LINK_INTERFACE(link),
695 LOG_NETDEV_INTERFACE(netdev),
696 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
697
698 r = netdev_join(netdev, link, NULL);
699 if (r < 0)
700 return log_struct_errno(LOG_WARNING, r,
701 LOG_LINK_INTERFACE(link),
702 LOG_NETDEV_INTERFACE(netdev),
703 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
704 }
705
706 return 0;
707}
708
e3a7b048 709static void link_enter_configured(Link *link) {
dd43110f
TG		 710 assert(link);
711 assert(link->network);
e3a7b048 712
289e6774 713 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 714 return;
dd43110f 715
e331e246 716 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 717
7033af49
YW		 718 (void) link_join_netdevs_after_configured(link);
719
84de38c5 720 link_dirty(link);
dd43110f
TG		 721}
722
6accfd31
DA		 723void link_check_ready(Link *link) {
724 Address *a;
6accfd31
DA		 725
726 assert(link);
727
5f58af25
YW		 728 if (link->state == LINK_STATE_CONFIGURED)
729 return;
730
731 if (link->state != LINK_STATE_CONFIGURING) {
732 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 733 return;
39373cb9 734 }
6accfd31
DA		 735
736 if (!link->network)
737 return;
738
39373cb9
YW		 739 if (!link->addresses_configured) {
740 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 741 return;
39373cb9 742 }
6accfd31 743
39373cb9
YW		 744 if (!link->neighbors_configured) {
745 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 746 return;
39373cb9 747 }
6accfd31 748
90e74a66 749 SET_FOREACH(a, link->addresses)
39373cb9
YW		 750 if (!address_is_ready(a)) {
751 _cleanup_free_ char *str = NULL;
752
753 (void) in_addr_to_string(a->family, &a->in_addr, &str);
754 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 755 return;
39373cb9 756 }
6aa5773b 757
39373cb9
YW		 758 if (!link->static_routes_configured) {
759 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 760 return;
39373cb9 761 }
6accfd31 762
39373cb9
YW		 763 if (!link->static_nexthops_configured) {
764 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 765 return;
39373cb9 766 }
c16c7808 767
39373cb9
YW		 768 if (!link->routing_policy_rules_configured) {
769 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 770 return;
39373cb9 771 }
6accfd31 772
39373cb9
YW		 773 if (!link->tc_configured) {
774 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 775 return;
39373cb9 776 }
4ecdcb07 777
39373cb9
YW		 778 if (!link->sr_iov_configured) {
779 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 780 return;
39373cb9 781 }
518cd6b5 782
1f241589
YW		 783 if (!link->bridge_mdb_configured) {
784 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
785 return;
786 }
787
463797c1 788 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 789 bool has_ndisc_address = false;
790 NDiscAddress *n;
6accfd31 791
1c09d84e 792 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 793 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 794 return;
39373cb9 795 }
6accfd31 796
463797c1 797 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 798 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
799 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 800 return;
39373cb9 801 }
6accfd31 802
90e74a66 803 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 804 if (!n->marked) {
805 has_ndisc_address = true;
806 break;
807 }
808
15797d6a 809 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 810 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 811 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
812 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 813 return;
814 }
815
1633c457 816 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 817 if (!link->dhcp4_configured &&
818 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
819 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 820 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 821 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 822 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
823 * an IPv4ll fallback address must be configured. */
824 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
825 return;
826 }
827
d98c546d 828 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		 829 __func__,
830 yes_no(link->dhcp4_configured),
831 yes_no(link->dhcp6_address_configured),
832 yes_no(link->dhcp6_route_configured),
833 yes_no(link->dhcp6_pd_address_configured),
834 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 835 yes_no(link->ndisc_addresses_configured),
836 yes_no(link->ndisc_routes_configured));
39373cb9 837 }
463797c1 838 }
6accfd31 839
5f58af25 840 link_enter_configured(link);
6accfd31
DA		 841
842 return;
843}
844
682c65b0 845static int link_set_static_configs(Link *link) {
f882c247
TG		 846 int r;
847
848 assert(link);
849 assert(link->network);
f5be5601 850 assert(link->state != _LINK_STATE_INVALID);
f882c247 851
2428613f 852 /* Reset all *_configured flags we are configuring. */
9b966cee 853 link->request_static_addresses = false;
2428613f 854 link->addresses_configured = false;
6aa5773b 855 link->addresses_ready = false;
2428613f
YW		 856 link->neighbors_configured = false;
857 link->static_routes_configured = false;
c16c7808 858 link->static_nexthops_configured = false;
2428613f
YW		 859 link->routing_policy_rules_configured = false;
860
f6bb7ac5
TJ		 861 r = link_set_bridge_fdb(link);
862 if (r < 0)
863 return r;
864
1f241589
YW		 865 r = link_set_bridge_mdb(link);
866 if (r < 0)
867 return r;
868
58f1fe9a 869 r = link_set_neighbors(link);
f3ef324d
YW		 870 if (r < 0)
871 return r;
e4a71bf3 872
682c65b0
YW		 873 r = link_set_addresses(link);
874 if (r < 0)
875 return r;
bd6379ec 876
fe2bc17c
YW		 877 r = link_set_address_labels(link);
878 if (r < 0)
879 return r;
f882c247 880
e5526518 881 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 882 r = dhcp4_server_configure(link);
883 if (r < 0)
884 return r;
d4cdbea5 885
f882c247
TG		 886 return 0;
887}
888
3a390124 889static int link_configure_continue(Link *link);
55dc8c4a 890
302a796f 891static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 892 int r;
893
894 assert(m);
895 assert(link);
896 assert(link->ifname);
897
55dc8c4a
YW		 898 link->setting_mtu = false;
899
5da8149f 900 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 901 return 1;
902
1c4baffc 903 r = sd_netlink_message_get_errno(m);
4ff296b0 904 if (r < 0)
5ecb131d 905 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 906 else
907 log_link_debug(link, "Setting MTU done.");
55dc8c4a 908
4ff296b0 909 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 910 r = link_configure_continue(link);
4ff296b0
YW		 911 if (r < 0)
912 link_enter_failed(link);
913 }
4f882b2a
TG		 914
915 return 1;
916}
917
933c70a0 918int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 919 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 920 int r;
921
922 assert(link);
923 assert(link->manager);
924 assert(link->manager->rtnl);
925
40288ece
YW		 926 if (mtu == 0 || link->setting_mtu)
927 return 0;
928
933c70a0 929 if (link->mtu == mtu)
ee493106
YW		 930 return 0;
931
6a7a4e4d 932 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 933
6a7a4e4d
LP		 934 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
935 if (r < 0)
936 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 937
44b598a1 938 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 939 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
940 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 941
942 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 943 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 944
72c2500b 945 mtu = IPV6_MIN_MTU;
44b598a1
SS		 946 }
947
1c4baffc 948 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 949 if (r < 0)
950 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 951
302a796f
YW		 952 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
953 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 954 if (r < 0)
955 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 956
ae941762 957 link_ref(link);
1046bf9b 958 link->setting_mtu = true;
b226d99b 959
4f882b2a
TG		 960 return 0;
961}
962
f6fcc1c2
YW		 963static bool link_reduces_vlan_mtu(Link *link) {
964 /* See netif_reduces_vlan_mtu() in kernel. */
965 return streq_ptr(link->kind, "macsec");
966}
967
968static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
969 uint32_t mtu = 0;
970 NetDev *dev;
f6fcc1c2 971
90e74a66 972 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 973 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
974 /* See vlan_dev_change_mtu() in kernel. */
975 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
976
977 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
978 /* See macvlan_change_mtu() in kernel. */
979 mtu = dev->mtu;
980
981 return mtu;
982}
983
984static int link_configure_mtu(Link *link) {
985 uint32_t mtu;
986
987 assert(link);
988 assert(link->network);
989
990 if (link->network->mtu > 0)
991 return link_set_mtu(link, link->network->mtu);
992
993 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
994 if (link->mtu >= mtu)
995 return 0;
996
997 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
998 "If it is not desired, then please explicitly specify MTUBytes= setting.",
999 link->mtu, mtu);
1000
1001 return link_set_mtu(link, mtu);
1002}
1003
302a796f 1004static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1005 int r;
1006
1007 assert(m);
1008 assert(link);
1009 assert(link->ifname);
1010
1011 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1012 return 1;
1013
1014 r = sd_netlink_message_get_errno(m);
1015 if (r < 0)
5ecb131d 1016 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1017
1018 return 1;
1019}
1020
1021static int link_set_flags(Link *link) {
1022 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1023 unsigned ifi_change = 0;
1024 unsigned ifi_flags = 0;
1025 int r;
1026
1027 assert(link);
1028 assert(link->manager);
1029 assert(link->manager->rtnl);
1030
1031 if (link->flags & IFF_LOOPBACK)
1032 return 0;
1033
1034 if (!link->network)
1035 return 0;
1036
866e6b7a 1037 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1038 return 0;
1039
1040 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1041 if (r < 0)
1042 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1043
1044 if (link->network->arp >= 0) {
1045 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1046 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1047 }
1048
1049 if (link->network->multicast >= 0) {
1050 ifi_change |= IFF_MULTICAST;
1051 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1052 }
1053
866e6b7a
SS		 1054 if (link->network->allmulticast >= 0) {
1055 ifi_change |= IFF_ALLMULTI;
1056 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1057 }
1058
99d2baa2
SS		 1059 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1060 if (r < 0)
1061 return log_link_error_errno(link, r, "Could not set link flags: %m");
1062
302a796f
YW		 1063 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1064 link_netlink_destroy_callback, link);
99d2baa2
SS		 1065 if (r < 0)
1066 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1067
1068 link_ref(link);
1069
1070 return 0;
1071}
1072
e7ab854c
TG		 1073static int link_acquire_ipv6_conf(Link *link) {
1074 int r;
1075
1076 assert(link);
1077
2ffd6d73 1078 if (link->ndisc) {
e7ab854c
TG		 1079 log_link_debug(link, "Discovering IPv6 routers");
1080
1e7a0e21 1081 r = sd_ndisc_start(link->ndisc);
63348d13 1082 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1083 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1084 }
1085
086b8853 1086 if (link->radv) {
7465dd22
PF		 1087 assert(link->radv);
1088 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1089
1090 log_link_debug(link, "Starting IPv6 Router Advertisements");
1091
fd3ef936
YW		 1092 r = radv_emit_dns(link);
1093 if (r < 0)
1094 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1095
7465dd22
PF		 1096 r = sd_radv_start(link->radv);
1097 if (r < 0 && r != -EBUSY)
1098 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1099 }
1100
838d39af
SS		 1101 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1102 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1103 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1104 assert(link->dhcp6_client);
1105 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1106
838d39af 1107 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1108 if (r < 0 && r != -EBUSY)
1633c457 1109 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1110 else
1111 log_link_debug(link, "Acquiring DHCPv6 lease");
1112 }
1113
1633c457
YW		 1114 r = dhcp6_request_prefix_delegation(link);
1115 if (r < 0)
1116 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1117
e7ab854c
TG		 1118 return 0;
1119}
1120
6fc25497 1121static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1122 int r;
1123
1124 assert(link);
ff254138
TG		 1125 assert(link->manager);
1126 assert(link->manager->event);
1127
910feb78 1128 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1129 assert(link->ipv4ll);
ff254138 1130
6a7a4e4d 1131 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1132
1133 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1134 if (r < 0)
1135 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1136 }
1137
2ffd6d73 1138 if (link->dhcp_client) {
6a7a4e4d 1139 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1140
5c1d3fc9 1141 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1142 if (r < 0)
1143 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1144 }
ff254138 1145
6fc25497
SS		 1146 return 0;
1147}
1148
1149static int link_acquire_conf(Link *link) {
1150 int r;
1151
1152 assert(link);
1153
1154 r = link_acquire_ipv4_conf(link);
1155 if (r < 0)
1156 return r;
1157
3f7cc080 1158 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1159 r = link_acquire_ipv6_conf(link);
1160 if (r < 0)
1161 return r;
1162 }
1163
2ffd6d73
YW		 1164 r = link_lldp_emit_start(link);
1165 if (r < 0)
1166 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1167
ff254138
TG		 1168 return 0;
1169}
1170
a61bb41c 1171bool link_has_carrier(Link *link) {
deb2e523
TG		 1172 /* see Documentation/networking/operstates.txt in the kernel sources */
1173
a61bb41c 1174 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1175 return true;
1176
a61bb41c 1177 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1178 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1179 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1180 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1181 return true;
1182
1183 return false;
1184}
1185
0e2fdb83
SS		 1186static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1187 int r;
1188
1189 assert(link);
1190
9524014e
DS		 1191 link->setting_genmode = false;
1192
0e2fdb83
SS		 1193 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1194 return 1;
1195
1196 r = sd_netlink_message_get_errno(m);
1197 if (r < 0)
5ecb131d 1198 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1199 else
1200 log_link_debug(link, "Setting address genmode done.");
1201
1202 if (link->state == LINK_STATE_INITIALIZED) {
1203 r = link_configure_continue(link);
1204 if (r < 0)
1205 link_enter_failed(link);
1206 }
0e2fdb83
SS		 1207
1208 return 1;
1209}
1210
1211static int link_configure_addrgen_mode(Link *link) {
1212 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1213 uint8_t ipv6ll_mode;
1214 int r;
1215
1216 assert(link);
1217 assert(link->network);
1218 assert(link->manager);
1219 assert(link->manager->rtnl);
1220
9524014e 1221 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1222 return 0;
1223
0e2fdb83
SS		 1224 log_link_debug(link, "Setting address genmode for link");
1225
1226 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1227 if (r < 0)
1228 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1229
1230 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1231 if (r < 0)
1232 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1233
1234 r = sd_netlink_message_open_container(req, AF_INET6);
1235 if (r < 0)
1236 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1237
1238 if (!link_ipv6ll_enabled(link))
1239 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1240 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1241 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1242 if (r < 0) {
1243 /* The file may not exist. And even if it exists, when stable_secret is unset,
1244 * reading the file fails with EIO. */
1245 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1246
1247 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1248 } else
1249 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1250 } else
6f6296b9 1251 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1252
1253 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1254 if (r < 0)
1255 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1256
1257 r = sd_netlink_message_close_container(req);
1258 if (r < 0)
1259 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1260
1261 r = sd_netlink_message_close_container(req);
1262 if (r < 0)
1263 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1264
1265 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1266 link_netlink_destroy_callback, link);
1267 if (r < 0)
1268 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1269
1270 link_ref(link);
9524014e 1271 link->setting_genmode = true;
0e2fdb83
SS		 1272
1273 return 0;
1274}
1275
302a796f 1276static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1277 int r;
1278
1746cf2a
TG		 1279 assert(link);
1280
5da8149f 1281 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1282 return 1;
1283
1c4baffc 1284 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1285 if (r < 0)
26d6b214 1286 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1287 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1288
f882c247
TG		 1289 return 1;
1290}
1291
1cc84f3b 1292static int link_up(Link *link) {
4afd3348 1293 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1294 int r;
1295
f882c247 1296 assert(link);
c106cc36 1297 assert(link->network);
f882c247
TG		 1298 assert(link->manager);
1299 assert(link->manager->rtnl);
1300
6a7a4e4d 1301 log_link_debug(link, "Bringing link up");
449f7554 1302
6a7a4e4d
LP		 1303 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1304 if (r < 0)
1305 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1306
2b2d8603 1307 /* set it free if not enslaved with networkd */
6cb955c6 1308 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1309 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1310 if (r < 0)
1311 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1312 }
1313
5d4795f3 1314 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1315 if (r < 0)
1316 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1317
c106cc36 1318 if (link->network->mac) {
1c4baffc 1319 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1320 if (r < 0)
1321 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1322 }
1323
302a796f
YW		 1324 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1325 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1326 if (r < 0)
1327 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1328
b226d99b
TG		 1329 link_ref(link);
1330
f882c247
TG		 1331 return 0;
1332}
1333
302a796f 1334static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1335 int r;
1336
1337 assert(link);
1338
1339 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1340 return 1;
1341
1c4baffc 1342 r = sd_netlink_message_get_errno(m);
0d4ad91d 1343 if (r < 0)
5ecb131d 1344 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1345
1346 return 1;
1347}
1348
8e54db83 1349int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1350 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1351 int r;
1352
1353 assert(link);
1354 assert(link->manager);
1355 assert(link->manager->rtnl);
1356
6a7a4e4d 1357 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1358
1359 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1360 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1361 if (r < 0)
1362 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1363
1364 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1365 if (r < 0)
1366 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1367
8e54db83
YW		 1368 r = netlink_call_async(link->manager->rtnl, NULL, req,
1369 callback ?: link_down_handler,
302a796f 1370 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1371 if (r < 0)
1372 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1373
1374 link_ref(link);
1375
1376 return 0;
1377}
1378
89fe6535
SS		 1379static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1380 int r;
1381
1382 assert(link);
1383
1384 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1385 return 1;
1386
1387 r = sd_netlink_message_get_errno(m);
1388 if (r < 0)
1389 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1390
1391 return 1;
1392}
1393
1394static int link_set_group(Link *link) {
1395 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1396 int r;
1397
1398 assert(link);
1399 assert(link->network);
1400 assert(link->manager);
1401 assert(link->manager->rtnl);
1402
1403 if (link->network->group <= 0)
1404 return 0;
1405
1406 log_link_debug(link, "Setting group");
1407
1408 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1411
1412 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not set link group: %m");
1415
1416 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1417 link_netlink_destroy_callback, link);
1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1420
1421 link_ref(link);
1422
1423 return 0;
1424}
1425
0d4ad91d
AR		 1426static int link_handle_bound_to_list(Link *link) {
1427 Link *l;
0d4ad91d
AR		 1428 int r;
1429 bool required_up = false;
1430 bool link_is_up = false;
1431
1432 assert(link);
1433
1434 if (hashmap_isempty(link->bound_to_links))
1435 return 0;
1436
1437 if (link->flags & IFF_UP)
1438 link_is_up = true;
1439
90e74a66 1440 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1441 if (link_has_carrier(l)) {
1442 required_up = true;
1443 break;
1444 }
1445
1446 if (!required_up && link_is_up) {
8e54db83 1447 r = link_down(link, NULL);
0d4ad91d
AR		 1448 if (r < 0)
1449 return r;
1450 } else if (required_up && !link_is_up) {
1451 r = link_up(link);
1452 if (r < 0)
1453 return r;
1454 }
1455
1456 return 0;
1457}
1458
1459static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1460 Link *l;
1461 int r;
1462
1463 assert(link);
1464
1465 if (hashmap_isempty(link->bound_by_links))
1466 return 0;
1467
90e74a66 1468 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1469 r = link_handle_bound_to_list(l);
1470 if (r < 0)
1471 return r;
1472 }
1473
1474 return 0;
1475}
1476
1477static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1478 int r;
1479
1480 assert(link);
1481 assert(carrier);
1482
1483 if (link == carrier)
1484 return 0;
1485
1486 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1487 return 0;
1488
1489 r = hashmap_ensure_allocated(h, NULL);
1490 if (r < 0)
1491 return r;
1492
1493 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1494 if (r < 0)
1495 return r;
1496
1497 return 0;
1498}
1499
1500static int link_new_bound_by_list(Link *link) {
1501 Manager *m;
1502 Link *carrier;
0d4ad91d
AR		 1503 int r;
1504 bool list_updated = false;
1505
1506 assert(link);
1507 assert(link->manager);
1508
1509 m = link->manager;
1510
90e74a66 1511 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1512 if (!carrier->network)
1513 continue;
1514
1515 if (strv_isempty(carrier->network->bind_carrier))
1516 continue;
1517
191a3f16 1518 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1519 r = link_put_carrier(link, carrier, &link->bound_by_links);
1520 if (r < 0)
1521 return r;
1522
1523 list_updated = true;
1524 }
1525 }
1526
1527 if (list_updated)
84de38c5 1528 link_dirty(link);
0d4ad91d 1529
90e74a66 1530 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1531 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1532 if (r < 0)
1533 return r;
1534
84de38c5 1535 link_dirty(carrier);
0d4ad91d
AR		 1536 }
1537
1538 return 0;
1539}
1540
1541static int link_new_bound_to_list(Link *link) {
1542 Manager *m;
1543 Link *carrier;
0d4ad91d
AR		 1544 int r;
1545 bool list_updated = false;
1546
1547 assert(link);
1548 assert(link->manager);
1549
1550 if (!link->network)
1551 return 0;
1552
1553 if (strv_isempty(link->network->bind_carrier))
1554 return 0;
1555
1556 m = link->manager;
1557
90e74a66 1558 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1559 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1560 r = link_put_carrier(link, carrier, &link->bound_to_links);
1561 if (r < 0)
1562 return r;
1563
1564 list_updated = true;
1565 }
1566 }
1567
1568 if (list_updated)
84de38c5 1569 link_dirty(link);
0d4ad91d 1570
90e74a66 1571 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1572 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1573 if (r < 0)
1574 return r;
1575
84de38c5 1576 link_dirty(carrier);
0d4ad91d
AR		 1577 }
1578
1579 return 0;
1580}
1581
1582static int link_new_carrier_maps(Link *link) {
1583 int r;
1584
1585 r = link_new_bound_by_list(link);
1586 if (r < 0)
1587 return r;
1588
1589 r = link_handle_bound_by_list(link);
1590 if (r < 0)
1591 return r;
1592
1593 r = link_new_bound_to_list(link);
1594 if (r < 0)
1595 return r;
1596
1597 r = link_handle_bound_to_list(link);
1598 if (r < 0)
1599 return r;
1600
1601 return 0;
1602}
1603
1604static void link_free_bound_to_list(Link *link) {
1605 Link *bound_to;
0d4ad91d 1606
90e74a66 1607 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1608 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1609
1610 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1611 link_dirty(bound_to);
0d4ad91d
AR		 1612 }
1613
1614 return;
1615}
1616
1617static void link_free_bound_by_list(Link *link) {
1618 Link *bound_by;
0d4ad91d 1619
90e74a66 1620 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1621 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1622
1623 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1624 link_dirty(bound_by);
0d4ad91d
AR		 1625 link_handle_bound_to_list(bound_by);
1626 }
1627 }
1628
1629 return;
1630}
1631
1632static void link_free_carrier_maps(Link *link) {
1633 bool list_updated = false;
1634
1635 assert(link);
1636
1637 if (!hashmap_isempty(link->bound_to_links)) {
1638 link_free_bound_to_list(link);
1639 list_updated = true;
1640 }
1641
1642 if (!hashmap_isempty(link->bound_by_links)) {
1643 link_free_bound_by_list(link);
1644 list_updated = true;
1645 }
1646
1647 if (list_updated)
84de38c5 1648 link_dirty(link);
0d4ad91d
AR		 1649
1650 return;
1651}
1652
5f707e12
YW		 1653static int link_append_to_master(Link *link, NetDev *netdev) {
1654 Link *master;
1655 int r;
1656
1657 assert(link);
1658 assert(netdev);
1659
1660 r = link_get(link->manager, netdev->ifindex, &master);
1661 if (r < 0)
1662 return r;
1663
de7fef4b 1664 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1665 if (r <= 0)
5f707e12
YW		 1666 return r;
1667
1668 link_ref(link);
1669 return 0;
1670}
1671
1672static void link_drop_from_master(Link *link, NetDev *netdev) {
1673 Link *master;
1674
1675 assert(link);
1676
1677 if (!link->manager || !netdev)
1678 return;
1679
1680 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1681 return;
1682
1683 link_unref(set_remove(master->slaves, link));
1684}
1685
1686static void link_detach_from_manager(Link *link) {
1687 if (!link || !link->manager)
1688 return;
1689
1690 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1691 link_clean(link);
1692
1693 /* The following must be called at last. */
1694 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1695 link_unref(link);
1696}
1697
0d4ad91d
AR		 1698void link_drop(Link *link) {
1699 if (!link || link->state == LINK_STATE_LINGER)
1700 return;
1701
1702 link_set_state(link, LINK_STATE_LINGER);
1703
1704 link_free_carrier_maps(link);
1705
5f707e12
YW		 1706 if (link->network) {
1707 link_drop_from_master(link, link->network->bridge);
1708 link_drop_from_master(link, link->network->bond);
1709 }
1710
6a7a4e4d 1711 log_link_debug(link, "Link removed");
0d4ad91d 1712
db2f8a2e 1713 (void) unlink(link->state_file);
c4397d94 1714 link_detach_from_manager(link);
0d4ad91d
AR		 1715}
1716
3f265037 1717static int link_joined(Link *link) {
f882c247
TG		 1718 int r;
1719
ef1ba606 1720 assert(link);
f5be5601 1721 assert(link->network);
dd3efc09 1722
0d4ad91d
AR		 1723 if (!hashmap_isempty(link->bound_to_links)) {
1724 r = link_handle_bound_to_list(link);
1725 if (r < 0)
1726 return r;
1727 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1728 r = link_up(link);
1729 if (r < 0) {
1730 link_enter_failed(link);
1731 return r;
1732 }
ef1ba606 1733 }
f882c247 1734
9ed794a3 1735 if (link->network->bridge) {
e1853b00 1736 r = link_set_bridge(link);
6a7a4e4d
LP		 1737 if (r < 0)
1738 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1739
1740 r = link_append_to_master(link, link->network->bridge);
1741 if (r < 0)
1742 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1743 }
1744
eb64b435 1745 if (link->network->bond) {
7fcee284 1746 r = link_set_bond(link);
eb64b435
SS		 1747 if (r < 0)
1748 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1749
45e11abf 1750 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1751 if (r < 0)
1752 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1753 }
1754
34d7f2c9
YW		 1755 r = link_set_bridge_vlan(link);
1756 if (r < 0)
1757 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1758
c1835a42
RM		 1759 /* Skip setting up addresses until it gets carrier,
1760 or it would try to set addresses twice,
1761 which is bad for non-idempotent steps. */
dad2d78e 1762 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1763 return 0;
1764
b425c3ae 1765 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1766
1767 r = link_acquire_conf(link);
1768 if (r < 0)
1769 return r;
1770
682c65b0 1771 return link_set_static_configs(link);
02b59d57
TG		 1772}
1773
302a796f 1774static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1775 int r;
1776
1746cf2a 1777 assert(link);
ef1ba606 1778 assert(link->network);
34bf3c00 1779 assert(link->enslaving > 0);
02b59d57 1780
313cefa1 1781 link->enslaving--;
52433f6b 1782
5da8149f 1783 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1784 return 1;
1785
1c4baffc 1786 r = sd_netlink_message_get_errno(m);
856f962c 1787 if (r < 0 && r != -EEXIST) {
5ecb131d 1788 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1789 link_enter_failed(link);
1790 return 1;
4ff296b0
YW		 1791 }
1792
1793 log_link_debug(link, "Joined netdev");
02b59d57 1794
34bf3c00 1795 if (link->enslaving == 0) {
4ff296b0
YW		 1796 r = link_joined(link);
1797 if (r < 0)
1798 link_enter_failed(link);
34bf3c00 1799 }
02b59d57
TG		 1800
1801 return 1;
1802}
1803
3f265037 1804static int link_enter_join_netdev(Link *link) {
6a0a2f86 1805 NetDev *netdev;
02b59d57
TG		 1806 int r;
1807
1808 assert(link);
1809 assert(link->network);
bd08ce56 1810 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1811
289e6774 1812 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1813
84de38c5 1814 link_dirty(link);
34bf3c00 1815 link->enslaving = 0;
02b59d57 1816
d9c67ea1 1817 if (link->network->bond) {
cbff7170
TJ		 1818 if (link->network->bond->state == NETDEV_STATE_READY &&
1819 link->network->bond->ifindex == link->master_ifindex)
1820 return link_joined(link);
1821
f2341e0a
LP		 1822 log_struct(LOG_DEBUG,
1823 LOG_LINK_INTERFACE(link),
1824 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1825 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1826
34bf3c00
YW		 1827 link->enslaving++;
1828
f2341e0a 1829 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1830 if (r < 0) {
f2341e0a
LP		 1831 log_struct_errno(LOG_WARNING, r,
1832 LOG_LINK_INTERFACE(link),
1833 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1834 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1835 link_enter_failed(link);
1836 return r;
1837 }
0ad6148e
MO		 1838 }
1839
d9c67ea1 1840 if (link->network->bridge) {
f2341e0a
LP		 1841 log_struct(LOG_DEBUG,
1842 LOG_LINK_INTERFACE(link),
1843 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1844 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1845
34bf3c00
YW		 1846 link->enslaving++;
1847
f2341e0a 1848 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1849 if (r < 0) {
f2341e0a
LP		 1850 log_struct_errno(LOG_WARNING, r,
1851 LOG_LINK_INTERFACE(link),
1852 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1853 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1854 link_enter_failed(link);
1855 return r;
1856 }
52433f6b
TG		 1857 }
1858
6cb955c6
AR		 1859 if (link->network->vrf) {
1860 log_struct(LOG_DEBUG,
1861 LOG_LINK_INTERFACE(link),
1862 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1863 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1864
34bf3c00
YW		 1865 link->enslaving++;
1866
6cb955c6
AR		 1867 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1868 if (r < 0) {
1869 log_struct_errno(LOG_WARNING, r,
1870 LOG_LINK_INTERFACE(link),
1871 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1872 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1873 link_enter_failed(link);
1874 return r;
1875 }
6cb955c6
AR		 1876 }
1877
90e74a66 1878 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1879
2b6db913
YW		 1880 if (netdev->ifindex > 0)
1881 /* Assume already enslaved. */
a63e5daa 1882 continue;
a63e5daa 1883
7033af49
YW		 1884 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1885 continue;
1886
f2341e0a
LP		 1887 log_struct(LOG_DEBUG,
1888 LOG_LINK_INTERFACE(link),
1889 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1890 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1891
34bf3c00
YW		 1892 link->enslaving++;
1893
f2341e0a 1894 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1895 if (r < 0) {
f2341e0a
LP		 1896 log_struct_errno(LOG_WARNING, r,
1897 LOG_LINK_INTERFACE(link),
1898 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1899 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1900 link_enter_failed(link);
1901 return r;
1902 }
326cb406
SS		 1903 }
1904
34bf3c00
YW		 1905 if (link->enslaving == 0)
1906 return link_joined(link);
1907
ef1ba606
TG		 1908 return 0;
1909}
1910
5e5b137a 1911static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 1912 int r;
1913
f8f2f880
YW		 1914 r = link_drop_foreign_addresses(link);
1915 if (r < 0)
1916 return r;
5e5b137a 1917
59048336
YW		 1918 r = link_drop_foreign_neighbors(link);
1919 if (r < 0)
1920 return r;
d1bdafd2 1921
779804dd 1922 return link_drop_foreign_routes(link);
5e5b137a
TG		 1923}
1924
3104883d 1925static int link_drop_config(Link *link) {
3104883d
SS		 1926 int r;
1927
d7fbb9f5
YW		 1928 r = link_drop_addresses(link);
1929 if (r < 0)
1930 return r;
3104883d 1931
59048336
YW		 1932 r = link_drop_neighbors(link);
1933 if (r < 0)
1934 return r;
d1bdafd2 1935
62f0ea5f
YW		 1936 r = link_drop_routes(link);
1937 if (r < 0)
1938 return r;
3104883d 1939
c69305ff
LP		 1940 ndisc_flush(link);
1941
3104883d
SS		 1942 return 0;
1943}
1944
256c75fd 1945int link_configure(Link *link) {
4ecdcb07
YW		 1946 int r;
1947
ef1ba606 1948 assert(link);
b22d8a00 1949 assert(link->network);
bd08ce56 1950 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1951
34658df2 1952 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1953 if (r < 0)
1954 return r;
1955
518cd6b5
SS		 1956 r = link_configure_sr_iov(link);
1957 if (r < 0)
1958 return r;
1959
500b96eb 1960 if (link->iftype == ARPHRD_CAN)
93ea7750 1961 return link_configure_can(link);
92c918b0 1962
5e0534f1 1963 r = link_set_sysctl(link);
b69c3180
SS		 1964 if (r < 0)
1965 return r;
8749cbcd 1966
5e0534f1 1967 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 1968 if (r < 0)
1969 return r;
1970
99d2baa2
SS		 1971 r = link_set_flags(link);
1972 if (r < 0)
1973 return r;
1974
89fe6535
SS		 1975 r = link_set_group(link);
1976 if (r < 0)
1977 return r;
1978
2ffd6d73
YW		 1979 r = ipv4ll_configure(link);
1980 if (r < 0)
1981 return r;
64b21ece 1982
2ffd6d73
YW		 1983 r = dhcp4_configure(link);
1984 if (r < 0)
1985 return r;
eb34d4af 1986
2ffd6d73
YW		 1987 r = dhcp6_configure(link);
1988 if (r < 0)
1989 return r;
f5a8c43f 1990
2ffd6d73
YW		 1991 r = ndisc_configure(link);
1992 if (r < 0)
1993 return r;
4138fb2c 1994
086b8853
YW		 1995 r = radv_configure(link);
1996 if (r < 0)
1997 return r;
7465dd22 1998
2ffd6d73
YW		 1999 r = link_lldp_rx_configure(link);
2000 if (r < 0)
2001 return r;
ce43e484 2002
f6fcc1c2 2003 r = link_configure_mtu(link);
40288ece
YW		 2004 if (r < 0)
2005 return r;
44b598a1 2006
9f6e82e6
YW		 2007 r = link_configure_addrgen_mode(link);
2008 if (r < 0)
2009 return r;
0e2fdb83 2010
3a390124
DS		 2011 return link_configure_continue(link);
2012}
2013
2014/* The configuration continues in this separate function, instead of
2015 * including this in the above link_configure() function, for two
2016 * reasons:
2017 * 1) some devices reset the link when the mtu is set, which caused
2018 * an infinite loop here in networkd; see:
2019 * https://github.com/systemd/systemd/issues/6593
2020 * https://github.com/systemd/systemd/issues/9831
2021 * 2) if ipv6ll is disabled, then bringing the interface up must be
2022 * delayed until after we get confirmation from the kernel that
2023 * the addr_gen_mode parameter has been set (via netlink), see:
2024 * https://github.com/systemd/systemd/issues/13882
2025 */
2026static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2027 int r;
2028
2029 assert(link);
2030 assert(link->network);
bd08ce56 2031 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2032
9524014e 2033 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2034 return 0;
2035
4c649652
DS		 2036 /* Drop foreign config, but ignore loopback or critical devices.
2037 * We do not want to remove loopback address or addresses used for root NFS. */
2038 if (!(link->flags & IFF_LOOPBACK) &&
2039 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2040 r = link_drop_foreign_config(link);
2041 if (r < 0)
2042 return r;
2043 }
2044
d236718c
DS		 2045 /* The kernel resets ipv6 mtu after changing device mtu;
2046 * we must set this here, after we've set device mtu */
2047 r = link_set_ipv6_mtu(link);
2048 if (r < 0)
5e0534f1 2049 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2050
3f265037 2051 return link_enter_join_netdev(link);
505f8da7
TG		 2052}
2053
572b21d9 2054static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2055 Network *network;
2056 int r;
2057
572b21d9
YW		 2058 if (m) {
2059 _cleanup_strv_free_ char **s = NULL;
2060
2061 r = sd_netlink_message_get_errno(m);
2062 if (r < 0)
2063 return r;
2064
2065 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2066 if (r < 0 && r != -ENODATA)
2067 return r;
2068
2069 strv_free_and_replace(link->alternative_names, s);
2070 }
2071
c643bda5
YW		 2072 r = network_get(link->manager, link->iftype, link->sd_device,
2073 link->ifname, link->alternative_names, link->driver,
2074 &link->mac, &link->permanent_mac,
2075 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2076 if (r == -ENOENT) {
2077 link_enter_unmanaged(link);
2078 return 0;
2079 } else if (r == 0 && network->unmanaged) {
2080 link_enter_unmanaged(link);
2081 return 0;
2082 } else if (r < 0)
2083 return r;
2084
99b8517c 2085 if (link->network == network && !force)
ad932b15
YW		 2086 return 0;
2087
2088 log_link_info(link, "Re-configuring with %s", network->filename);
2089
2090 /* Dropping old .network file */
2a99eed0 2091 r = link_stop_engines(link, false);
572b21d9 2092 if (r < 0)
ad932b15 2093 return r;
ad932b15 2094
ad932b15
YW		 2095 r = link_drop_config(link);
2096 if (r < 0)
2097 return r;
2098
2c7b826d 2099 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2100 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2101 r = link_drop_foreign_config(link);
2102 if (r < 0)
2103 return r;
2104 }
2105
2106 link_free_carrier_maps(link);
2107 link_free_engines(link);
2108 link->network = network_unref(link->network);
2109
2110 /* Then, apply new .network file */
2111 r = network_apply(network, link);
2112 if (r < 0)
2113 return r;
2114
2115 r = link_new_carrier_maps(link);
2116 if (r < 0)
2117 return r;
2118
2119 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2120 link_dirty(link);
ad932b15
YW		 2121
2122 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2123 * link_configure() is called later asynchronously. */
2124 r = link_configure_duid(link);
2125 if (r <= 0)
2126 return r;
2127
2128 r = link_configure(link);
2129 if (r < 0)
2130 return r;
2131
2132 return 0;
2133}
2134
572b21d9
YW		 2135static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2136 int r;
2137
2138 r = link_reconfigure_internal(link, m, false);
2139 if (r < 0)
2140 link_enter_failed(link);
2141
2142 return 1;
2143}
2144
2145static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2146 int r;
2147
2148 r = link_reconfigure_internal(link, m, true);
2149 if (r < 0)
2150 link_enter_failed(link);
2151
2152 return 1;
2153}
2154
2155int link_reconfigure(Link *link, bool force) {
2156 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2157 int r;
2158
2c0d7ed3
YW		 2159 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2160 return 0;
2161
572b21d9
YW		 2162 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2163 link->ifindex);
2164 if (r < 0)
2165 return r;
2166
2167 r = netlink_call_async(link->manager->rtnl, NULL, req,
2168 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2169 link_netlink_destroy_callback, link);
2170 if (r < 0)
2171 return r;
2172
2173 link_ref(link);
2174
2175 return 0;
2176}
2177
e6bf7774 2178static int link_initialized_and_synced(Link *link) {
505f8da7 2179 Network *network;
505f8da7
TG		 2180 int r;
2181
2182 assert(link);
2183 assert(link->ifname);
2184 assert(link->manager);
2185
bd08ce56
YW		 2186 /* We may get called either from the asynchronous netlink callback,
2187 * or directly for link_add() if running in a container. See link_add(). */
2188 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2189 return 0;
505f8da7 2190
6a7a4e4d 2191 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2192 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2193
0d4ad91d
AR		 2194 r = link_new_bound_by_list(link);
2195 if (r < 0)
2196 return r;
2197
2198 r = link_handle_bound_by_list(link);
2199 if (r < 0)
2200 return r;
2201
c4a03a56 2202 if (!link->network) {
0894cfe4 2203 r = wifi_get_info(link);
8d968fdd
YW		 2204 if (r < 0)
2205 return r;
2206
c643bda5
YW		 2207 r = network_get(link->manager, link->iftype, link->sd_device,
2208 link->ifname, link->alternative_names, link->driver,
2209 &link->mac, &link->permanent_mac,
2210 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2211 if (r == -ENOENT) {
2212 link_enter_unmanaged(link);
4232cf04 2213 return 0;
a09dc546
DM		 2214 } else if (r == 0 && network->unmanaged) {
2215 link_enter_unmanaged(link);
2216 return 0;
c4a03a56
TG		 2217 } else if (r < 0)
2218 return r;
505f8da7 2219
c4a03a56
TG		 2220 if (link->flags & IFF_LOOPBACK) {
2221 if (network->link_local != ADDRESS_FAMILY_NO)
2222 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2223
c4a03a56
TG		 2224 if (network->dhcp != ADDRESS_FAMILY_NO)
2225 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2226
c4a03a56
TG		 2227 if (network->dhcp_server)
2228 log_link_debug(link, "Ignoring DHCP server for loopback link");
2229 }
bd2efe92 2230
7d342c03 2231 r = network_apply(network, link);
c4a03a56
TG		 2232 if (r < 0)
2233 return r;
2234 }
505f8da7 2235
0d4ad91d
AR		 2236 r = link_new_bound_to_list(link);
2237 if (r < 0)
2238 return r;
2239
27dfc982
YW		 2240 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2241 * link_configure() is called later asynchronously. */
2242 r = link_configure_duid(link);
2243 if (r <= 0)
2244 return r;
2245
a748b692
TG		 2246 r = link_configure(link);
2247 if (r < 0)
2248 return r;
2249
4232cf04 2250 return 0;
505f8da7
TG		 2251}
2252
302a796f 2253static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2254 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2255 int r;
2256
572b21d9
YW		 2257 r = sd_netlink_message_get_errno(m);
2258 if (r < 0) {
40681e5c 2259 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2260 link_enter_failed(link);
2261 return 0;
2262 }
2263
2264 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2265 if (r < 0 && r != -ENODATA) {
2266 link_enter_failed(link);
2267 return 0;
2268 }
2269
2270 strv_free_and_replace(link->alternative_names, s);
2271
4ff296b0
YW		 2272 r = link_initialized_and_synced(link);
2273 if (r < 0)
2274 link_enter_failed(link);
e6bf7774
YW		 2275 return 1;
2276}
2277
51517f9e 2278int link_initialized(Link *link, sd_device *device) {
4afd3348 2279 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2280 int r;
2281
2282 assert(link);
2283 assert(link->manager);
2284 assert(link->manager->rtnl);
2285 assert(device);
2286
8434fd5c 2287 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2288 return 0;
2289
51517f9e 2290 if (link->sd_device)
679b3605
TG		 2291 return 0;
2292
79008bdd 2293 log_link_debug(link, "udev initialized link");
bd08ce56 2294 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2295
51517f9e 2296 link->sd_device = sd_device_ref(device);
4f561e8e 2297
3c9b8860
TG		 2298 /* udev has initialized the link, but we don't know if we have yet
2299 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2300 * when it returns we know that the pending NEWLINKs have already been
2301 * processed and that we are up-to-date */
4f561e8e 2302
3c9b8860
TG		 2303 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2304 link->ifindex);
4f561e8e
TG		 2305 if (r < 0)
2306 return r;
2307
302a796f
YW		 2308 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2309 link_netlink_destroy_callback, link);
4f561e8e
TG		 2310 if (r < 0)
2311 return r;
2312
5da8149f
TG		 2313 link_ref(link);
2314
4f561e8e
TG		 2315 return 0;
2316}
2317
c4a03a56 2318static int link_load(Link *link) {
0bc70f1d
TG		 2319 _cleanup_free_ char *network_file = NULL,
2320 *addresses = NULL,
f703cc2c 2321 *routes = NULL,
0bc70f1d
TG		 2322 *dhcp4_address = NULL,
2323 *ipv4ll_address = NULL;
c4a03a56
TG		 2324 int r;
2325
2326 assert(link);
2327
aa8fbc74 2328 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2329 "NETWORK_FILE", &network_file,
2330 "ADDRESSES", &addresses,
f703cc2c 2331 "ROUTES", &routes,
0bc70f1d 2332 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2333 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2334 if (r < 0 && r != -ENOENT)
2335 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2336
2337 if (network_file) {
2338 Network *network;
2339 char *suffix;
2340
2341 /* drop suffix */
2342 suffix = strrchr(network_file, '.');
2343 if (!suffix) {
2344 log_link_debug(link, "Failed to get network name from %s", network_file);
2345 goto network_file_fail;
2346 }
2347 *suffix = '\0';
2348
2349 r = network_get_by_name(link->manager, basename(network_file), &network);
2350 if (r < 0) {
2351 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2352 goto network_file_fail;
2353 }
2354
7d342c03 2355 r = network_apply(network, link);
c4a03a56
TG		 2356 if (r < 0)
2357 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2358 }
2359
2360network_file_fail:
2361
da4d3a61
YW		 2362 r = link_deserialize_addresses(link, addresses);
2363 if (r < 0)
2364 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2365
731ff05b
YW		 2366 r = link_deserialize_routes(link, routes);
2367 if (r < 0)
2368 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2369
571eeba9
YW		 2370 r = link_deserialize_dhcp4(link, dhcp4_address);
2371 if (r < 0)
2372 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2373
daad60d1
YW		 2374 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2375 if (r < 0)
2376 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2377
c4a03a56
TG		 2378 return 0;
2379}
2380
1c4baffc 2381int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2382 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2383 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2384 Link *link;
5a937ea2 2385 int r;
505f8da7
TG		 2386
2387 assert(m);
fbbeb65a 2388 assert(m->rtnl);
505f8da7
TG		 2389 assert(message);
2390 assert(ret);
2391
2392 r = link_new(m, message, ret);
2393 if (r < 0)
2394 return r;
2395
2396 link = *ret;
2397
6a7a4e4d 2398 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2399
c4a03a56
TG		 2400 r = link_load(link);
2401 if (r < 0)
2402 return r;
2403
bf331d87
YW		 2404 if (path_is_read_only_fs("/sys") <= 0) {
2405 /* udev should be around */
ae06ab10 2406 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2407 r = sd_device_new_from_device_id(&device, ifindex_str);
2408 if (r < 0) {
4d59e14f
YW		 2409 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2410 return 0;
5c416fc4 2411 }
505f8da7 2412
5a937ea2 2413 r = sd_device_get_is_initialized(device);
51517f9e 2414 if (r < 0) {
bf331d87 2415 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2416 goto failed;
2417 }
5a937ea2 2418 if (r == 0) {
505f8da7 2419 /* not yet ready */
79008bdd 2420 log_link_debug(link, "link pending udev initialization...");
505f8da7 2421 return 0;
3c4cb064 2422 }
505f8da7 2423
299ad32d
YW		 2424 r = device_is_renaming(device);
2425 if (r < 0) {
bf331d87 2426 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2427 goto failed;
2428 }
2429 if (r > 0) {
bf331d87 2430 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2431 return 0;
2432 }
2433
4f561e8e
TG		 2434 r = link_initialized(link, device);
2435 if (r < 0)
5c416fc4 2436 goto failed;
4f561e8e 2437 } else {
e6bf7774 2438 r = link_initialized_and_synced(link);
4f561e8e 2439 if (r < 0)
5c416fc4 2440 goto failed;
4f561e8e 2441 }
505f8da7 2442
a748b692 2443 return 0;
5c416fc4
TG		 2444failed:
2445 link_enter_failed(link);
2446 return r;
a748b692
TG		 2447}
2448
c601ebf7 2449int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2450 int r;
2451
2452 assert(link);
2453
2454 log_link_info(link, "Gained IPv6LL");
2455
c601ebf7 2456 link->ipv6ll_address = *address;
e7ab854c
TG		 2457 link_check_ready(link);
2458
b9ea3d2e 2459 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2460 r = link_acquire_ipv6_conf(link);
2461 if (r < 0) {
2462 link_enter_failed(link);
2463 return r;
2464 }
2465 }
2466
2467 return 0;
2468}
2469
9c0a72f9
TG		 2470static int link_carrier_gained(Link *link) {
2471 int r;
2472
2473 assert(link);
2474
0894cfe4 2475 r = wifi_get_info(link);
8d968fdd
YW		 2476 if (r < 0)
2477 return r;
2478 if (r > 0) {
572b21d9
YW		 2479 r = link_reconfigure_internal(link, NULL, false);
2480 if (r < 0) {
2481 link_enter_failed(link);
8d968fdd 2482 return r;
572b21d9 2483 }
8d968fdd
YW		 2484 }
2485
b9ea3d2e 2486 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2487 r = link_acquire_conf(link);
2488 if (r < 0) {
2489 link_enter_failed(link);
2490 return r;
2491 }
6fc25497 2492
b425c3ae 2493 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2494 r = link_set_static_configs(link);
6fc25497
SS		 2495 if (r < 0)
2496 return r;
9c0a72f9
TG		 2497 }
2498
0d4ad91d
AR		 2499 r = link_handle_bound_by_list(link);
2500 if (r < 0)
2501 return r;
2502
1f241589
YW		 2503 if (!link->bridge_mdb_configured) {
2504 r = link_set_bridge_mdb(link);
2505 if (r < 0)
2506 return r;
2507 }
2508
2509 if (streq_ptr(link->kind, "bridge")) {
2510 Link *slave;
2511
2512 SET_FOREACH(slave, link->slaves) {
2513 if (slave->bridge_mdb_configured)
2514 continue;
2515
2516 r = link_set_bridge_mdb(slave);
2517 if (r < 0)
2518 link_enter_failed(slave);
2519 }
2520 }
3db468ea 2521
9c0a72f9
TG		 2522 return 0;
2523}
2524
2525static int link_carrier_lost(Link *link) {
2526 int r;
2527
2528 assert(link);
2529
25e992ba 2530 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2531 return 0;
2532
fbdb6605 2533 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2534 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2535 * configuration and stop the clients as well. */
97e7fb39
SS		 2536 if (link->setting_mtu)
2537 return 0;
2538
2a99eed0 2539 r = link_stop_engines(link, false);
9c0a72f9
TG		 2540 if (r < 0) {
2541 link_enter_failed(link);
2542 return r;
2543 }
2544
3104883d
SS		 2545 r = link_drop_config(link);
2546 if (r < 0)
2547 return r;
2548
2c7b826d 2549 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2550 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2551 r = link_drop_foreign_config(link);
2552 if (r < 0)
2553 return r;
2554 }
3104883d 2555
0d4ad91d
AR		 2556 r = link_handle_bound_by_list(link);
2557 if (r < 0)
2558 return r;
2559
9c0a72f9
TG		 2560 return 0;
2561}
2562
2563int link_carrier_reset(Link *link) {
2564 int r;
2565
2566 assert(link);
2567
2568 if (link_has_carrier(link)) {
2569 r = link_carrier_lost(link);
2570 if (r < 0)
2571 return r;
2572
2573 r = link_carrier_gained(link);
2574 if (r < 0)
2575 return r;
2576
6a7a4e4d 2577 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2578 }
2579
2580 return 0;
2581}
2582
d236718c
DS		 2583/* This is called every time an interface admin state changes to up;
2584 * specifically, when IFF_UP flag changes from unset to set */
2585static int link_admin_state_up(Link *link) {
2586 int r;
2587
2588 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2589 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2590 * ipv6_mtu_set prevents this from trying to set it too early before
2591 * the link->network has been setup; we only need to reset it
2592 * here if we've already set it during normal initialization. */
2593 if (link->ipv6_mtu_set) {
2594 r = link_set_ipv6_mtu(link);
2595 if (r < 0)
2596 return r;
2597 }
2598
2599 return 0;
2600}
2601
1c4baffc 2602int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2603 _cleanup_strv_free_ char **s = NULL;
c49b33ac 2604 struct ether_addr mac;
ca4e095a 2605 const char *ifname;
afe7fd56 2606 uint32_t mtu;
d236718c 2607 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2608 int old_master, r;
22936833 2609
dd3efc09 2610 assert(link);
b8941f74 2611 assert(link->ifname);
22936833
TG		 2612 assert(m);
2613
7619683b 2614 if (link->state == LINK_STATE_LINGER) {
5238e957 2615 log_link_info(link, "Link re-added");
289e6774 2616 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2617
2618 r = link_new_carrier_maps(link);
2619 if (r < 0)
2620 return r;
7619683b
TG		 2621 }
2622
1c4baffc 2623 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2624 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2625 Manager *manager = link->manager;
b8941f74 2626
30de2b89 2627 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2628
30de2b89
YW		 2629 link_drop(link);
2630 r = link_add(manager, m, &link);
2631 if (r < 0)
2632 return r;
b8941f74
TG		 2633 }
2634
572b21d9
YW		 2635 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2636 if (r >= 0)
2637 strv_free_and_replace(link->alternative_names, s);
2638
1c4baffc 2639 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2640 if (r >= 0 && mtu > 0) {
2641 link->mtu = mtu;
4e964aa0 2642 if (link->original_mtu == 0) {
afe7fd56 2643 link->original_mtu = mtu;
6a7a4e4d 2644 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2645 }
2646
2647 if (link->dhcp_client) {
3c9b8860
TG		 2648 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2649 link->mtu);
fc95c359
YW		 2650 if (r < 0)
2651 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2652 }
7465dd22
PF		 2653
2654 if (link->radv) {
2655 r = sd_radv_set_mtu(link->radv, link->mtu);
2656 if (r < 0)
2657 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2658 }
9842de0d 2659 }
69629de9 2660
e9189a1f
TG		 2661 /* The kernel may broadcast NEWLINK messages without the MAC address
2662 set, simply ignore them. */
1c4baffc 2663 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 2664 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
2665
2666 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
2667
2668 log_link_debug(link, "Gained new MAC address: "
2669 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
2670 mac.ether_addr_octet[0],
2671 mac.ether_addr_octet[1],
2672 mac.ether_addr_octet[2],
2673 mac.ether_addr_octet[3],
2674 mac.ether_addr_octet[4],
2675 mac.ether_addr_octet[5]);
2676
a3adb4a6
YW		 2677 r = ipv4ll_update_mac(link);
2678 if (r < 0)
2679 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2680
d947f7f9
YW		 2681 r = dhcp4_update_mac(link);
2682 if (r < 0)
2683 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2684
eebba6dc
YW		 2685 r = dhcp6_update_mac(link);
2686 if (r < 0)
2687 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2688
be9363cc
YW		 2689 r = dhcp6_update_mac(link);
2690 if (r < 0)
2691 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2692
2693 if (link->ndisc) {
2694 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
2695 if (r < 0)
2696 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2697 }
d93d655c
YW		 2698
2699 r = ipv4_dad_update_mac(link);
2700 if (r < 0)
2701 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2702 }
2703
bb262ef0
YW		 2704 old_master = link->master_ifindex;
2705 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2706
d236718c 2707 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2708 had_carrier = link_has_carrier(link);
2709
bb262ef0 2710 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2711 if (r < 0)
2712 return r;
2713
d236718c
DS		 2714 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2715 log_link_info(link, "Link UP");
2716
2717 r = link_admin_state_up(link);
2718 if (r < 0)
2719 return r;
2720 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2721 log_link_info(link, "Link DOWN");
2722
273eec24
LP		 2723 r = link_update_lldp(link);
2724 if (r < 0)
2725 return r;
2726
a61bb41c
TG		 2727 carrier_gained = !had_carrier && link_has_carrier(link);
2728 carrier_lost = had_carrier && !link_has_carrier(link);
2729
2730 if (carrier_gained) {
6a7a4e4d 2731 log_link_info(link, "Gained carrier");
a61bb41c 2732
9c0a72f9
TG		 2733 r = link_carrier_gained(link);
2734 if (r < 0)
2735 return r;
a61bb41c 2736 } else if (carrier_lost) {
6a7a4e4d 2737 log_link_info(link, "Lost carrier");
a61bb41c 2738
9c0a72f9
TG		 2739 r = link_carrier_lost(link);
2740 if (r < 0)
a61bb41c 2741 return r;
a61bb41c
TG		 2742 }
2743
2744 return 0;
dd3efc09 2745}
fe8db0c5 2746
b295beea
LP		 2747static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2748 bool space = false;
b295beea
LP		 2749 Link *link;
2750
2751 assert(f);
2752 assert(prefix);
2753
2754 if (hashmap_isempty(h))
2755 return;
2756
0d536673 2757 fputs(prefix, f);
90e74a66 2758 HASHMAP_FOREACH(link, h) {
b295beea 2759 if (space)
0d536673 2760 fputc(' ', f);
b295beea
LP		 2761
2762 fprintf(f, "%i", link->ifindex);
2763 space = true;
2764 }
2765
0d536673 2766 fputc('\n', f);
b295beea
LP		 2767}
2768
64581765 2769static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2770 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2771 const char *str;
15761549 2772
64581765
YW		 2773 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2774 continue;
2775
e77bd3fd
YW		 2776 str = in_addr_full_to_string(dns[j]);
2777 if (!str)
15761549 2778 continue;
15761549
YW		 2779
2780 if (*space)
2781 fputc(' ', f);
e77bd3fd 2782 fputs(str, f);
15761549
YW		 2783 *space = true;
2784 }
2785}
2786
d5e172d2
ZJS		 2787static void serialize_addresses(
2788 FILE *f,
2789 const char *lvalue,
2790 bool *space,
2791 char **addresses,
2792 sd_dhcp_lease *lease,
2793 bool conditional,
ddb82ec2 2794 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2795 sd_dhcp6_lease *lease6,
2796 bool conditional6,
2797 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2798 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2799 int r;
2800
2801 bool _space = false;
2802 if (!space)
2803 space = &_space;
2804
2805 if (lvalue)
2806 fprintf(f, "%s=", lvalue);
2807 fputstrv(f, addresses, NULL, space);
2808
2809 if (lease && conditional) {
2810 const struct in_addr *lease_addresses;
2811
2812 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2813 if (r > 0)
d8bff5cc 2814 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2815 }
2816
2817 if (lease6 && conditional6 && lease6_get_addr) {
2818 const struct in6_addr *in6_addrs;
2819
2820 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2821 if (r > 0)
2822 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2823 }
2824
2825 if (lease6 && conditional6 && lease6_get_fqdn) {
2826 char **in6_hosts;
2827
2828 r = lease6_get_fqdn(lease6, &in6_hosts);
2829 if (r > 0)
2830 fputstrv(f, in6_hosts, NULL, space);
2831 }
2832
2833 if (lvalue)
2834 fputc('\n', f);
2835}
2836
fe8db0c5 2837int link_save(Link *link) {
d361b373 2838 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2839 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2840 _cleanup_fclose_ FILE *f = NULL;
2841 int r;
2842
2843 assert(link);
2844 assert(link->state_file);
68a8723c 2845 assert(link->lease_file);
bbf7c048
TG		 2846 assert(link->manager);
2847
370e9930 2848 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2849 (void) unlink(link->state_file);
370e9930
TG		 2850 return 0;
2851 }
2852
34437b4f
LP		 2853 link_lldp_save(link);
2854
deb2e523
TG		 2855 admin_state = link_state_to_string(link->state);
2856 assert(admin_state);
2857
e375dcde
TG		 2858 oper_state = link_operstate_to_string(link->operstate);
2859 assert(oper_state);
deb2e523 2860
ac999bf0
YW		 2861 carrier_state = link_carrier_state_to_string(link->carrier_state);
2862 assert(carrier_state);
2863
2864 address_state = link_address_state_to_string(link->address_state);
2865 assert(address_state);
2866
fe8db0c5
TG		 2867 r = fopen_temporary(link->state_file, &f, &temp_path);
2868 if (r < 0)
6a7a4e4d 2869 goto fail;
fe8db0c5 2870
5512a963 2871 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2872
2873 fprintf(f,
2874 "# This is private data. Do not parse.\n"
deb2e523 2875 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2876 "OPER_STATE=%s\n"
2877 "CARRIER_STATE=%s\n"
2878 "ADDRESS_STATE=%s\n",
2879 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2880
bcb7a07e 2881 if (link->network) {
fe0e16db
YW		 2882 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2883 const char *dhcp_domainname = NULL, *p;
fe0e16db 2884 bool space;
07bdc70d 2885
c1a38904
MTL		 2886 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2887 yes_no(link->network->required_for_online));
2888
d5e172d2
ZJS		 2889 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2890 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2891 strempty(link_operstate_to_string(st.min)),
2892 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2893 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2894
adc5b2e2
TG		 2895 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2896
d5e172d2
ZJS		 2897 /************************************************************/
2898
0d536673 2899 fputs("DNS=", f);
ea352b40 2900 space = false;
15761549 2901 if (link->n_dns != (unsigned) -1)
64581765 2902 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2903 else
64581765 2904 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2905
d5e172d2
ZJS		 2906 serialize_addresses(f, NULL, &space,
2907 NULL,
2908 link->dhcp_lease,
2909 link->network->dhcp_use_dns,
ddb82ec2 2910 SD_DHCP_LEASE_DNS,
1633c457 2911 link->dhcp6_lease,
d5e172d2
ZJS		 2912 link->network->dhcp6_use_dns,
2913 sd_dhcp6_lease_get_dns,
2914 NULL);
1e7a0e21 2915
a8c10331 2916 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2917 ndisc_vacuum(link);
2918
b296797f 2919 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2920 NDiscRDNSS *dd;
2921
90e74a66 2922 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2923 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2924 }
2925
2926 fputc('\n', f);
2927
d5e172d2
ZJS		 2928 /************************************************************/
2929
2930 serialize_addresses(f, "NTP", NULL,
2931 link->ntp ?: link->network->ntp,
2932 link->dhcp_lease,
2933 link->network->dhcp_use_ntp,
ddb82ec2 2934 SD_DHCP_LEASE_NTP,
1633c457 2935 link->dhcp6_lease,
d5e172d2
ZJS		 2936 link->network->dhcp6_use_ntp,
2937 sd_dhcp6_lease_get_ntp_addrs,
2938 sd_dhcp6_lease_get_ntp_fqdn);
2939
2940 serialize_addresses(f, "SIP", NULL,
2a71d57f 2941 NULL,
d5e172d2
ZJS		 2942 link->dhcp_lease,
2943 link->network->dhcp_use_sip,
ddb82ec2 2944 SD_DHCP_LEASE_SIP,
2a71d57f 2945 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2946
2947 /************************************************************/
bd8f6538 2948
b2a81c0b 2949 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2950 if (link->dhcp_lease) {
b2a81c0b 2951 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2952 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2953 }
1633c457
YW		 2954 if (link->dhcp6_lease)
2955 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2956 }
2957
fe0e16db
YW		 2958 fputs("DOMAINS=", f);
2959 space = false;
90e74a66 2960 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2961 fputs_with_space(f, p, NULL, &space);
07bdc70d 2962
1e7a0e21 2963 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 2964 if (dhcp_domainname)
2965 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2966 if (dhcp_domains)
2967 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2968 if (dhcp6_domains)
2969 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2970 }
2971
2972 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
2973 NDiscDNSSL *dd;
1e7a0e21 2974
90e74a66 2975 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 2976 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
2977 }
b2a81c0b 2978
0d536673 2979 fputc('\n', f);
6192b846 2980
d5e172d2
ZJS		 2981 /************************************************************/
2982
fe0e16db
YW		 2983 fputs("ROUTE_DOMAINS=", f);
2984 space = false;
90e74a66 2985 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 2986 fputs_with_space(f, p, NULL, &space);
b2a81c0b 2987
1e7a0e21 2988 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
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_ROUTE) {
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);
67272d15 3005
d5e172d2
ZJS		 3006 /************************************************************/
3007
3c9b8860 3008 fprintf(f, "LLMNR=%s\n",
15761549 3009 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3010
3011 /************************************************************/
3012
aaa297d4 3013 fprintf(f, "MDNS=%s\n",
15761549 3014 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3015
d5e172d2
ZJS		 3016 /************************************************************/
3017
3018 int dns_default_route =
3019 link->dns_default_route >= 0 ? link->dns_default_route :
3020 link->network->dns_default_route;
3021 if (dns_default_route >= 0)
3022 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3023
3024 /************************************************************/
3025
3026 DnsOverTlsMode dns_over_tls_mode =
3027 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3028 link->network->dns_over_tls_mode;
3029 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3030 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3031
3032 /************************************************************/
3033
3034 DnssecMode dnssec_mode =
3035 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3036 link->network->dnssec_mode;
3037 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3038 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3039
3040 /************************************************************/
3041
3042 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3043 if (set_isempty(nta_anchors))
3044 nta_anchors = link->network->dnssec_negative_trust_anchors;
3045
3046 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3047 const char *n;
3048
0d536673 3049 fputs("DNSSEC_NTA=", f);
8a516214 3050 space = false;
90e74a66 3051 SET_FOREACH(n, nta_anchors)
d390f8ef 3052 fputs_with_space(f, n, NULL, &space);
0d536673 3053 fputc('\n', f);
8a516214
LP		 3054 }
3055
d5e172d2
ZJS		 3056 /************************************************************/
3057
3b31e2b7
YW		 3058 r = link_serialize_addresses(link, f);
3059 if (r < 0)
3060 goto fail;
c1eb9872 3061
d5e172d2
ZJS		 3062 /************************************************************/
3063
56519412
YW		 3064 r = link_serialize_routes(link, f);
3065 if (r < 0)
3066 goto fail;
bcb7a07e 3067 }
7374f9d8 3068
b295beea
LP		 3069 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3070 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3071
8eb9058d 3072 if (link->dhcp_lease) {
bd91b83e 3073 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3074 if (r < 0)
c2d6bd61 3075 goto fail;
fe8db0c5 3076
7374f9d8 3077 fprintf(f,
b0e39c82
TG		 3078 "DHCP_LEASE=%s\n",
3079 link->lease_file);
deb2e523 3080 } else
6990fb6b 3081 (void) unlink(link->lease_file);
fe8db0c5 3082
ca21a19a
YW		 3083 r = link_serialize_ipv4ll(link, f);
3084 if (r < 0)
3085 goto fail;
0bc70f1d 3086
5460bde5
YW		 3087 r = link_serialize_dhcp6_client(link, f);
3088 if (r < 0)
3089 goto fail;
18d8a2cf 3090
c2d6bd61
LP		 3091 r = fflush_and_check(f);
3092 if (r < 0)
3093 goto fail;
fe8db0c5 3094
c2d6bd61 3095 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3096 r = -errno;
c2d6bd61 3097 goto fail;
fe8db0c5
TG		 3098 }
3099
c2d6bd61 3100 return 0;
dacd6cee 3101
c2d6bd61 3102fail:
6a7a4e4d 3103 (void) unlink(link->state_file);
6a7a4e4d
LP		 3104 if (temp_path)
3105 (void) unlink(temp_path);
3106
dacd6cee 3107 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3108}
3109
84de38c5
TG		 3110/* The serialized state in /run is no longer up-to-date. */
3111void link_dirty(Link *link) {
3112 int r;
3113
3114 assert(link);
3115
0c241a37
SS		 3116 /* mark manager dirty as link is dirty */
3117 manager_dirty(link->manager);
3118
de7fef4b 3119 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3120 if (r <= 0)
de7fef4b 3121 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3122 return;
84de38c5
TG		 3123 link_ref(link);
3124}
3125
3126/* The serialized state in /run is up-to-date */
3127void link_clean(Link *link) {
3128 assert(link);
3129 assert(link->manager);
3130
1046bf9b 3131 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3132}
3133
c2a65950
YW		 3134int link_save_and_clean(Link *link) {
3135 int r;
3136
3137 r = link_save(link);
3138 if (r < 0)
3139 return r;
3140
3141 link_clean(link);
3142 return 0;
3143}
3144
fe8db0c5 3145static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3146 [LINK_STATE_PENDING] = "pending",
bd08ce56 3147 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3148 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3149 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3150 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3151 [LINK_STATE_FAILED] = "failed",
370e9930 3152 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3153};
3154
3155DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3156
3157int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3158 const char *err_msg = NULL;
3159
3160 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3161 return log_link_full_errno(link, level, err,
3162 "%s: %s%s%s%m",
3163 msg,
3164 strempty(err_msg),
3165 err_msg && !endswith(err_msg, ".") ? "." : "",
3166 err_msg ? " " : "");
5ecb131d 3167}
Unnamed repository; edit this file 'description' to name the repository.