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network: store full hardware address in Link struct
[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
b8162cd2 424 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 425 if (r < 0)
b8162cd2 426 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 427
c643bda5 428 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 429 if (r < 0)
430 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
431
c643bda5
YW		 432 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
433 if (r < 0)
434 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
435
572b21d9
YW		 436 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
437 if (r < 0 && r != -ENODATA)
438 return r;
439
34437b4f 440 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 441 return -ENOMEM;
fe8db0c5 442
34437b4f 443 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 444 return -ENOMEM;
445
34437b4f 446 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 447 return -ENOMEM;
448
d5099efc 449 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 450 if (r < 0)
451 return r;
452
453 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 454 if (r < 0)
455 return r;
456
bb262ef0 457 r = link_update_flags(link, message, false);
51d18171
TG		 458 if (r < 0)
459 return r;
460
1cc6c93a 461 *ret = TAKE_PTR(link);
f579559b
TG		 462
463 return 0;
464}
465
15761549
YW		 466void link_ntp_settings_clear(Link *link) {
467 link->ntp = strv_free(link->ntp);
468}
469
470void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 471 if (link->n_dns != (unsigned) -1)
472 for (unsigned i = 0; i < link->n_dns; i++)
473 in_addr_full_free(link->dns[i]);
15761549
YW		 474 link->dns = mfree(link->dns);
475 link->n_dns = (unsigned) -1;
476
477 link->search_domains = ordered_set_free_free(link->search_domains);
478 link->route_domains = ordered_set_free_free(link->route_domains);
479
480 link->dns_default_route = -1;
481 link->llmnr = _RESOLVE_SUPPORT_INVALID;
482 link->mdns = _RESOLVE_SUPPORT_INVALID;
483 link->dnssec_mode = _DNSSEC_MODE_INVALID;
484 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
485
486 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
487}
488
1a6bb31f
YW		 489static void link_free_engines(Link *link) {
490 if (!link)
491 return;
492
493 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
494 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
495 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 496 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 497
498 link->lldp = sd_lldp_unref(link->lldp);
1c494872 499 link_lldp_emit_stop(link);
1a6bb31f
YW		 500
501 ndisc_flush(link);
502
503 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
504 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 505 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 506 link->ndisc = sd_ndisc_unref(link->ndisc);
507 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 508
509 ipv4_dad_unref(link);
1a6bb31f
YW		 510}
511
8301aa0b 512static Link *link_free(Link *link) {
8301aa0b 513 assert(link);
f579559b 514
15761549
YW		 515 link_ntp_settings_clear(link);
516 link_dns_settings_clear(link);
517
8eec0b9d
YW		 518 link->routes = set_free(link->routes);
519 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 520 link->dhcp_routes = set_free(link->dhcp_routes);
521 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 522 link->dhcp6_routes = set_free(link->dhcp6_routes);
523 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
524 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
525 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 526 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 527
8eec0b9d
YW		 528 link->nexthops = set_free(link->nexthops);
529 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 530
8eec0b9d
YW		 531 link->neighbors = set_free(link->neighbors);
532 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 533
8eec0b9d
YW		 534 link->addresses = set_free(link->addresses);
535 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 536 link->pool_addresses = set_free(link->pool_addresses);
e5526518 537 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 538 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
539 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
540 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
541 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 542 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 543
1a6bb31f 544 link_free_engines(link);
68a8723c 545 free(link->lease_file);
49699bac
SS		 546 free(link->lldp_file);
547
c166a070 548 free(link->ifname);
572b21d9 549 strv_free(link->alternative_names);
ceac4078 550 free(link->kind);
8d968fdd 551 free(link->ssid);
c643bda5 552 free(link->driver);
6cad256d 553
db2f8a2e 554 (void) unlink(link->state_file);
fe8db0c5 555 free(link->state_file);
c166a070 556
51517f9e 557 sd_device_unref(link->sd_device);
b5db00e5 558
0d4ad91d 559 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 560 hashmap_free(link->bound_by_links);
561
5f707e12 562 set_free_with_destructor(link->slaves, link_unref);
033295c1 563
c9c908a6
YW		 564 network_unref(link->network);
565
8301aa0b 566 return mfree(link);
14b746f7
TG		 567}
568
8301aa0b 569DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 570
11a7f229
TG		 571int link_get(Manager *m, int ifindex, Link **ret) {
572 Link *link;
11a7f229
TG		 573
574 assert(m);
e856ed00 575 assert(ifindex > 0);
11a7f229
TG		 576 assert(ret);
577
ae06ab10 578 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 579 if (!link)
580 return -ENODEV;
581
582 *ret = link;
583
584 return 0;
585}
586
af9ba57a 587void link_set_state(Link *link, LinkState state) {
e331e246
TG		 588 assert(link);
589
590 if (link->state == state)
591 return;
592
0beb9542
YW		 593 log_link_debug(link, "State changed: %s -> %s",
594 link_state_to_string(link->state),
595 link_state_to_string(state));
596
e331e246
TG		 597 link->state = state;
598
599 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 600}
601
57bd6899
TG		 602static void link_enter_unmanaged(Link *link) {
603 assert(link);
604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 606
84de38c5 607 link_dirty(link);
57bd6899
TG		 608}
609
2a99eed0 610int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 611 int r = 0, k;
612
613 assert(link);
614 assert(link->manager);
615 assert(link->manager->event);
616
80060352
ZJS		 617 bool keep_dhcp = may_keep_dhcp &&
618 link->network &&
619 (link->manager->restarting ||
620 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
621
84add3cd 622 if (!keep_dhcp) {
111bb8f9 623 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 624 if (k < 0)
36c7d709 625 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 626 }
627
84add3cd
YW		 628 k = sd_ipv4acd_stop(link->dhcp_acd);
629 if (k < 0)
630 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 631
2a99eed0
YW		 632 k = sd_dhcp_server_stop(link->dhcp_server);
633 if (k < 0)
634 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
635
9cc65242
YW		 636 k = sd_lldp_stop(link->lldp);
637 if (k < 0)
638 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
639
84add3cd
YW		 640 k = sd_ipv4ll_stop(link->ipv4ll);
641 if (k < 0)
642 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 643
490ccbd5 644 k = ipv4_dad_stop(link);
2488e4d9
YW		 645 if (k < 0)
646 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 647
84add3cd
YW		 648 k = sd_dhcp6_client_stop(link->dhcp6_client);
649 if (k < 0)
650 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 651
2ffd6d73
YW		 652 k = dhcp6_pd_remove(link);
653 if (k < 0)
654 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 655
84add3cd
YW		 656 k = sd_ndisc_stop(link->ndisc);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 659
84add3cd
YW		 660 k = sd_radv_stop(link->radv);
661 if (k < 0)
662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 663
7272b25e 664 link_lldp_emit_stop(link);
111bb8f9
TG		 665 return r;
666}
667
b22d8a00 668void link_enter_failed(Link *link) {
ef1ba606 669 assert(link);
f882c247 670
370e9930 671 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 672 return;
673
6a7a4e4d 674 log_link_warning(link, "Failed");
449f7554 675
e331e246 676 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 677
2a99eed0 678 (void) link_stop_engines(link, false);
111bb8f9 679
84de38c5 680 link_dirty(link);
f882c247
TG		 681}
682
7033af49
YW		 683static int link_join_netdevs_after_configured(Link *link) {
684 NetDev *netdev;
7033af49
YW		 685 int r;
686
90e74a66 687 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 688 if (netdev->ifindex > 0)
689 /* Assume already enslaved. */
690 continue;
691
692 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
693 continue;
694
695 log_struct(LOG_DEBUG,
696 LOG_LINK_INTERFACE(link),
697 LOG_NETDEV_INTERFACE(netdev),
698 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
699
700 r = netdev_join(netdev, link, NULL);
701 if (r < 0)
702 return log_struct_errno(LOG_WARNING, r,
703 LOG_LINK_INTERFACE(link),
704 LOG_NETDEV_INTERFACE(netdev),
705 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
706 }
707
708 return 0;
709}
710
e3a7b048 711static void link_enter_configured(Link *link) {
dd43110f
TG		 712 assert(link);
713 assert(link->network);
e3a7b048 714
289e6774 715 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 716 return;
dd43110f 717
e331e246 718 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 719
7033af49
YW		 720 (void) link_join_netdevs_after_configured(link);
721
84de38c5 722 link_dirty(link);
dd43110f
TG		 723}
724
6accfd31
DA		 725void link_check_ready(Link *link) {
726 Address *a;
6accfd31
DA		 727
728 assert(link);
729
5f58af25
YW		 730 if (link->state == LINK_STATE_CONFIGURED)
731 return;
732
733 if (link->state != LINK_STATE_CONFIGURING) {
734 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 735 return;
39373cb9 736 }
6accfd31
DA		 737
738 if (!link->network)
739 return;
740
39373cb9
YW		 741 if (!link->addresses_configured) {
742 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 743 return;
39373cb9 744 }
6accfd31 745
39373cb9
YW		 746 if (!link->neighbors_configured) {
747 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 748 return;
39373cb9 749 }
6accfd31 750
90e74a66 751 SET_FOREACH(a, link->addresses)
39373cb9
YW		 752 if (!address_is_ready(a)) {
753 _cleanup_free_ char *str = NULL;
754
755 (void) in_addr_to_string(a->family, &a->in_addr, &str);
756 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 757 return;
39373cb9 758 }
6aa5773b 759
39373cb9
YW		 760 if (!link->static_routes_configured) {
761 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 762 return;
39373cb9 763 }
6accfd31 764
39373cb9
YW		 765 if (!link->static_nexthops_configured) {
766 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 767 return;
39373cb9 768 }
c16c7808 769
39373cb9
YW		 770 if (!link->routing_policy_rules_configured) {
771 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 772 return;
39373cb9 773 }
6accfd31 774
39373cb9
YW		 775 if (!link->tc_configured) {
776 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 777 return;
39373cb9 778 }
4ecdcb07 779
39373cb9
YW		 780 if (!link->sr_iov_configured) {
781 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 782 return;
39373cb9 783 }
518cd6b5 784
1f241589
YW		 785 if (!link->bridge_mdb_configured) {
786 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
787 return;
788 }
789
463797c1 790 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 791 bool has_ndisc_address = false;
792 NDiscAddress *n;
6accfd31 793
1c09d84e 794 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 795 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 796 return;
39373cb9 797 }
6accfd31 798
463797c1 799 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 800 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
801 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 802 return;
39373cb9 803 }
6accfd31 804
90e74a66 805 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 806 if (!n->marked) {
807 has_ndisc_address = true;
808 break;
809 }
810
15797d6a 811 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 812 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 813 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
814 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 815 return;
816 }
817
1633c457 818 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 819 if (!link->dhcp4_configured &&
820 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
821 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 822 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 823 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 824 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
825 * an IPv4ll fallback address must be configured. */
826 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
827 return;
828 }
829
d98c546d 830 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 831 __func__,
832 yes_no(link->dhcp4_configured),
833 yes_no(link->dhcp6_address_configured),
834 yes_no(link->dhcp6_route_configured),
835 yes_no(link->dhcp6_pd_address_configured),
836 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 837 yes_no(link->ndisc_addresses_configured),
838 yes_no(link->ndisc_routes_configured));
39373cb9 839 }
463797c1 840 }
6accfd31 841
5f58af25 842 link_enter_configured(link);
6accfd31
DA		 843
844 return;
845}
846
682c65b0 847static int link_set_static_configs(Link *link) {
f882c247
TG		 848 int r;
849
850 assert(link);
851 assert(link->network);
f5be5601 852 assert(link->state != _LINK_STATE_INVALID);
f882c247 853
2428613f 854 /* Reset all *_configured flags we are configuring. */
9b966cee 855 link->request_static_addresses = false;
2428613f 856 link->addresses_configured = false;
6aa5773b 857 link->addresses_ready = false;
2428613f
YW		 858 link->neighbors_configured = false;
859 link->static_routes_configured = false;
c16c7808 860 link->static_nexthops_configured = false;
2428613f
YW		 861 link->routing_policy_rules_configured = false;
862
f6bb7ac5
TJ		 863 r = link_set_bridge_fdb(link);
864 if (r < 0)
865 return r;
866
1f241589
YW		 867 r = link_set_bridge_mdb(link);
868 if (r < 0)
869 return r;
870
58f1fe9a 871 r = link_set_neighbors(link);
f3ef324d
YW		 872 if (r < 0)
873 return r;
e4a71bf3 874
682c65b0
YW		 875 r = link_set_addresses(link);
876 if (r < 0)
877 return r;
bd6379ec 878
fe2bc17c
YW		 879 r = link_set_address_labels(link);
880 if (r < 0)
881 return r;
f882c247 882
e5526518 883 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 884 r = dhcp4_server_configure(link);
885 if (r < 0)
886 return r;
d4cdbea5 887
f882c247
TG		 888 return 0;
889}
890
3a390124 891static int link_configure_continue(Link *link);
55dc8c4a 892
e16e4b3b
DS		 893static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
894 int r;
895
896 assert(link);
897
898 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
899 return 1;
900
901 r = sd_netlink_message_get_errno(m);
902 if (r < 0)
903 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
904 else
905 log_link_debug(link, "Setting MAC address done.");
906
907 return 1;
908}
909
910static int link_set_mac(Link *link) {
911 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
912 int r;
913
914 assert(link);
915 assert(link->network);
916 assert(link->manager);
917 assert(link->manager->rtnl);
918
919 if (!link->network->mac)
920 return 0;
921
922 log_link_debug(link, "Setting MAC address");
923
924 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
925 if (r < 0)
926 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
927
928 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
929 if (r < 0)
930 return log_link_error_errno(link, r, "Could not set MAC address: %m");
931
932 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
933 link_netlink_destroy_callback, link);
934 if (r < 0)
935 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
936
937 link_ref(link);
938
939 return 0;
940}
941
942static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
943 int r;
944
945 assert(link);
946
947 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
948 return 1;
949
950 r = sd_netlink_message_get_errno(m);
951 if (r < 0)
952 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
953 else
954 log_link_debug(link, "Setting nomaster done.");
955
956 return 1;
957}
958
959static int link_set_nomaster(Link *link) {
960 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
961 int r;
962
963 assert(link);
964 assert(link->network);
965 assert(link->manager);
966 assert(link->manager->rtnl);
967
968 /* set it free if not enslaved with networkd */
969 if (link->network->bridge || link->network->bond || link->network->vrf)
970 return 0;
971
972 log_link_debug(link, "Setting nomaster");
973
974 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
975 if (r < 0)
976 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
977
978 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
979 if (r < 0)
980 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
981
982 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
983 link_netlink_destroy_callback, link);
984 if (r < 0)
985 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
986
987 link_ref(link);
988
989 return 0;
990}
991
302a796f 992static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 993 int r;
994
995 assert(m);
996 assert(link);
997 assert(link->ifname);
998
55dc8c4a
YW		 999 link->setting_mtu = false;
1000
5da8149f 1001 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1002 return 1;
1003
1c4baffc 1004 r = sd_netlink_message_get_errno(m);
4ff296b0 1005 if (r < 0)
5ecb131d 1006 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1007 else
1008 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1009
4ff296b0 1010 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1011 r = link_configure_continue(link);
4ff296b0
YW		 1012 if (r < 0)
1013 link_enter_failed(link);
1014 }
4f882b2a
TG		 1015
1016 return 1;
1017}
1018
933c70a0 1019int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1020 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1021 int r;
1022
1023 assert(link);
1024 assert(link->manager);
1025 assert(link->manager->rtnl);
1026
40288ece
YW		 1027 if (mtu == 0 || link->setting_mtu)
1028 return 0;
1029
933c70a0 1030 if (link->mtu == mtu)
ee493106
YW		 1031 return 0;
1032
6a7a4e4d 1033 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1034
6a7a4e4d
LP		 1035 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1036 if (r < 0)
1037 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1038
44b598a1 1039 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1040 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1041 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1042
1043 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1044 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1045
72c2500b 1046 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1047 }
1048
1c4baffc 1049 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1050 if (r < 0)
1051 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1052
302a796f
YW		 1053 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1054 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1055 if (r < 0)
1056 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1057
ae941762 1058 link_ref(link);
1046bf9b 1059 link->setting_mtu = true;
b226d99b 1060
4f882b2a
TG		 1061 return 0;
1062}
1063
f6fcc1c2
YW		 1064static bool link_reduces_vlan_mtu(Link *link) {
1065 /* See netif_reduces_vlan_mtu() in kernel. */
1066 return streq_ptr(link->kind, "macsec");
1067}
1068
1069static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1070 uint32_t mtu = 0;
1071 NetDev *dev;
f6fcc1c2 1072
90e74a66 1073 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1074 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1075 /* See vlan_dev_change_mtu() in kernel. */
1076 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1077
1078 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1079 /* See macvlan_change_mtu() in kernel. */
1080 mtu = dev->mtu;
1081
1082 return mtu;
1083}
1084
1085static int link_configure_mtu(Link *link) {
1086 uint32_t mtu;
1087
1088 assert(link);
1089 assert(link->network);
1090
1091 if (link->network->mtu > 0)
1092 return link_set_mtu(link, link->network->mtu);
1093
1094 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1095 if (link->mtu >= mtu)
1096 return 0;
1097
1098 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1099 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1100 link->mtu, mtu);
1101
1102 return link_set_mtu(link, mtu);
1103}
1104
302a796f 1105static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1106 int r;
1107
1108 assert(m);
1109 assert(link);
1110 assert(link->ifname);
1111
1112 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1113 return 1;
1114
1115 r = sd_netlink_message_get_errno(m);
1116 if (r < 0)
5ecb131d 1117 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1118
1119 return 1;
1120}
1121
1122static int link_set_flags(Link *link) {
1123 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1124 unsigned ifi_change = 0;
1125 unsigned ifi_flags = 0;
1126 int r;
1127
1128 assert(link);
1129 assert(link->manager);
1130 assert(link->manager->rtnl);
1131
1132 if (link->flags & IFF_LOOPBACK)
1133 return 0;
1134
1135 if (!link->network)
1136 return 0;
1137
866e6b7a 1138 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1139 return 0;
1140
1141 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1142 if (r < 0)
1143 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1144
1145 if (link->network->arp >= 0) {
1146 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1147 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1148 }
1149
1150 if (link->network->multicast >= 0) {
1151 ifi_change |= IFF_MULTICAST;
1152 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1153 }
1154
866e6b7a
SS		 1155 if (link->network->allmulticast >= 0) {
1156 ifi_change |= IFF_ALLMULTI;
1157 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1158 }
1159
99d2baa2
SS		 1160 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1161 if (r < 0)
1162 return log_link_error_errno(link, r, "Could not set link flags: %m");
1163
302a796f
YW		 1164 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1165 link_netlink_destroy_callback, link);
99d2baa2
SS		 1166 if (r < 0)
1167 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1168
1169 link_ref(link);
1170
1171 return 0;
1172}
1173
e7ab854c
TG		 1174static int link_acquire_ipv6_conf(Link *link) {
1175 int r;
1176
1177 assert(link);
1178
2ffd6d73 1179 if (link->ndisc) {
e7ab854c
TG		 1180 log_link_debug(link, "Discovering IPv6 routers");
1181
1e7a0e21 1182 r = sd_ndisc_start(link->ndisc);
63348d13 1183 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1184 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1185 }
1186
086b8853 1187 if (link->radv) {
7465dd22
PF		 1188 assert(link->radv);
1189 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1190
1191 log_link_debug(link, "Starting IPv6 Router Advertisements");
1192
fd3ef936
YW		 1193 r = radv_emit_dns(link);
1194 if (r < 0)
1195 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1196
7465dd22
PF		 1197 r = sd_radv_start(link->radv);
1198 if (r < 0 && r != -EBUSY)
1199 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1200 }
1201
838d39af
SS		 1202 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1203 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1204 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1205 assert(link->dhcp6_client);
1206 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1207
838d39af 1208 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1209 if (r < 0 && r != -EBUSY)
1633c457 1210 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1211 else
1212 log_link_debug(link, "Acquiring DHCPv6 lease");
1213 }
1214
1633c457
YW		 1215 r = dhcp6_request_prefix_delegation(link);
1216 if (r < 0)
1217 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1218
e7ab854c
TG		 1219 return 0;
1220}
1221
6fc25497 1222static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1223 int r;
1224
1225 assert(link);
ff254138
TG		 1226 assert(link->manager);
1227 assert(link->manager->event);
1228
910feb78 1229 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1230 assert(link->ipv4ll);
ff254138 1231
6a7a4e4d 1232 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1233
1234 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1235 if (r < 0)
1236 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1237 }
1238
2ffd6d73 1239 if (link->dhcp_client) {
6a7a4e4d 1240 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1241
5c1d3fc9 1242 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1243 if (r < 0)
1244 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1245 }
ff254138 1246
6fc25497
SS		 1247 return 0;
1248}
1249
1250static int link_acquire_conf(Link *link) {
1251 int r;
1252
1253 assert(link);
1254
1255 r = link_acquire_ipv4_conf(link);
1256 if (r < 0)
1257 return r;
1258
3f7cc080 1259 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1260 r = link_acquire_ipv6_conf(link);
1261 if (r < 0)
1262 return r;
1263 }
1264
2ffd6d73
YW		 1265 r = link_lldp_emit_start(link);
1266 if (r < 0)
1267 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1268
ff254138
TG		 1269 return 0;
1270}
1271
a61bb41c 1272bool link_has_carrier(Link *link) {
deb2e523
TG		 1273 /* see Documentation/networking/operstates.txt in the kernel sources */
1274
a61bb41c 1275 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1276 return true;
1277
a61bb41c 1278 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1279 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1280 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1281 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1282 return true;
1283
1284 return false;
1285}
1286
0e2fdb83
SS		 1287static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1288 int r;
1289
1290 assert(link);
1291
9524014e
DS		 1292 link->setting_genmode = false;
1293
0e2fdb83
SS		 1294 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1295 return 1;
1296
1297 r = sd_netlink_message_get_errno(m);
1298 if (r < 0)
5ecb131d 1299 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1300 else
1301 log_link_debug(link, "Setting address genmode done.");
1302
1303 if (link->state == LINK_STATE_INITIALIZED) {
1304 r = link_configure_continue(link);
1305 if (r < 0)
1306 link_enter_failed(link);
1307 }
0e2fdb83
SS		 1308
1309 return 1;
1310}
1311
1312static int link_configure_addrgen_mode(Link *link) {
1313 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1314 uint8_t ipv6ll_mode;
1315 int r;
1316
1317 assert(link);
1318 assert(link->network);
1319 assert(link->manager);
1320 assert(link->manager->rtnl);
1321
9524014e 1322 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1323 return 0;
1324
0e2fdb83
SS		 1325 log_link_debug(link, "Setting address genmode for link");
1326
1327 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1328 if (r < 0)
1329 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1330
1331 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1334
1335 r = sd_netlink_message_open_container(req, AF_INET6);
1336 if (r < 0)
1337 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1338
1339 if (!link_ipv6ll_enabled(link))
1340 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1341 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1342 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1343 if (r < 0) {
1344 /* The file may not exist. And even if it exists, when stable_secret is unset,
1345 * reading the file fails with EIO. */
1346 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1347
1348 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1349 } else
1350 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1351 } else
6f6296b9 1352 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1353
1354 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1357
1358 r = sd_netlink_message_close_container(req);
1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1361
1362 r = sd_netlink_message_close_container(req);
1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1365
1366 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1367 link_netlink_destroy_callback, link);
1368 if (r < 0)
1369 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1370
1371 link_ref(link);
9524014e 1372 link->setting_genmode = true;
0e2fdb83
SS		 1373
1374 return 0;
1375}
1376
302a796f 1377static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1378 int r;
1379
1746cf2a
TG		 1380 assert(link);
1381
5da8149f 1382 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1383 return 1;
1384
1c4baffc 1385 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1386 if (r < 0)
26d6b214 1387 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1388 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1389
f882c247
TG		 1390 return 1;
1391}
1392
1cc84f3b 1393static int link_up(Link *link) {
4afd3348 1394 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1395 int r;
1396
f882c247 1397 assert(link);
c106cc36 1398 assert(link->network);
f882c247
TG		 1399 assert(link->manager);
1400 assert(link->manager->rtnl);
1401
6a7a4e4d 1402 log_link_debug(link, "Bringing link up");
449f7554 1403
6a7a4e4d
LP		 1404 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1407
5d4795f3 1408 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1411
302a796f
YW		 1412 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1413 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1414 if (r < 0)
1415 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1416
b226d99b
TG		 1417 link_ref(link);
1418
f882c247
TG		 1419 return 0;
1420}
1421
302a796f 1422static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1423 int r;
1424
1425 assert(link);
1426
1427 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1428 return 1;
1429
1c4baffc 1430 r = sd_netlink_message_get_errno(m);
0d4ad91d 1431 if (r < 0)
5ecb131d 1432 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1433
1434 return 1;
1435}
1436
8e54db83 1437int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1438 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1439 int r;
1440
1441 assert(link);
1442 assert(link->manager);
1443 assert(link->manager->rtnl);
1444
6a7a4e4d 1445 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1446
1447 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1448 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1451
1452 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1455
8e54db83
YW		 1456 r = netlink_call_async(link->manager->rtnl, NULL, req,
1457 callback ?: link_down_handler,
302a796f 1458 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1459 if (r < 0)
1460 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1461
1462 link_ref(link);
1463
1464 return 0;
1465}
1466
89fe6535
SS		 1467static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1468 int r;
1469
1470 assert(link);
1471
1472 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1473 return 1;
1474
1475 r = sd_netlink_message_get_errno(m);
1476 if (r < 0)
1477 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1478
1479 return 1;
1480}
1481
1482static int link_set_group(Link *link) {
1483 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1484 int r;
1485
1486 assert(link);
1487 assert(link->network);
1488 assert(link->manager);
1489 assert(link->manager->rtnl);
1490
1491 if (link->network->group <= 0)
1492 return 0;
1493
1494 log_link_debug(link, "Setting group");
1495
1496 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1499
1500 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not set link group: %m");
1503
1504 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1505 link_netlink_destroy_callback, link);
1506 if (r < 0)
1507 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1508
1509 link_ref(link);
1510
1511 return 0;
1512}
1513
0d4ad91d
AR		 1514static int link_handle_bound_to_list(Link *link) {
1515 Link *l;
0d4ad91d
AR		 1516 int r;
1517 bool required_up = false;
1518 bool link_is_up = false;
1519
1520 assert(link);
1521
1522 if (hashmap_isempty(link->bound_to_links))
1523 return 0;
1524
1525 if (link->flags & IFF_UP)
1526 link_is_up = true;
1527
90e74a66 1528 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1529 if (link_has_carrier(l)) {
1530 required_up = true;
1531 break;
1532 }
1533
1534 if (!required_up && link_is_up) {
8e54db83 1535 r = link_down(link, NULL);
0d4ad91d
AR		 1536 if (r < 0)
1537 return r;
1538 } else if (required_up && !link_is_up) {
1539 r = link_up(link);
1540 if (r < 0)
1541 return r;
1542 }
1543
1544 return 0;
1545}
1546
1547static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1548 Link *l;
1549 int r;
1550
1551 assert(link);
1552
1553 if (hashmap_isempty(link->bound_by_links))
1554 return 0;
1555
90e74a66 1556 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1557 r = link_handle_bound_to_list(l);
1558 if (r < 0)
1559 return r;
1560 }
1561
1562 return 0;
1563}
1564
1565static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1566 int r;
1567
1568 assert(link);
1569 assert(carrier);
1570
1571 if (link == carrier)
1572 return 0;
1573
1574 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1575 return 0;
1576
1577 r = hashmap_ensure_allocated(h, NULL);
1578 if (r < 0)
1579 return r;
1580
1581 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1582 if (r < 0)
1583 return r;
1584
1585 return 0;
1586}
1587
1588static int link_new_bound_by_list(Link *link) {
1589 Manager *m;
1590 Link *carrier;
0d4ad91d
AR		 1591 int r;
1592 bool list_updated = false;
1593
1594 assert(link);
1595 assert(link->manager);
1596
1597 m = link->manager;
1598
90e74a66 1599 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1600 if (!carrier->network)
1601 continue;
1602
1603 if (strv_isempty(carrier->network->bind_carrier))
1604 continue;
1605
191a3f16 1606 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1607 r = link_put_carrier(link, carrier, &link->bound_by_links);
1608 if (r < 0)
1609 return r;
1610
1611 list_updated = true;
1612 }
1613 }
1614
1615 if (list_updated)
84de38c5 1616 link_dirty(link);
0d4ad91d 1617
90e74a66 1618 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1619 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1620 if (r < 0)
1621 return r;
1622
84de38c5 1623 link_dirty(carrier);
0d4ad91d
AR		 1624 }
1625
1626 return 0;
1627}
1628
1629static int link_new_bound_to_list(Link *link) {
1630 Manager *m;
1631 Link *carrier;
0d4ad91d
AR		 1632 int r;
1633 bool list_updated = false;
1634
1635 assert(link);
1636 assert(link->manager);
1637
1638 if (!link->network)
1639 return 0;
1640
1641 if (strv_isempty(link->network->bind_carrier))
1642 return 0;
1643
1644 m = link->manager;
1645
90e74a66 1646 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1647 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1648 r = link_put_carrier(link, carrier, &link->bound_to_links);
1649 if (r < 0)
1650 return r;
1651
1652 list_updated = true;
1653 }
1654 }
1655
1656 if (list_updated)
84de38c5 1657 link_dirty(link);
0d4ad91d 1658
90e74a66 1659 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1660 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1661 if (r < 0)
1662 return r;
1663
84de38c5 1664 link_dirty(carrier);
0d4ad91d
AR		 1665 }
1666
1667 return 0;
1668}
1669
1670static int link_new_carrier_maps(Link *link) {
1671 int r;
1672
1673 r = link_new_bound_by_list(link);
1674 if (r < 0)
1675 return r;
1676
1677 r = link_handle_bound_by_list(link);
1678 if (r < 0)
1679 return r;
1680
1681 r = link_new_bound_to_list(link);
1682 if (r < 0)
1683 return r;
1684
1685 r = link_handle_bound_to_list(link);
1686 if (r < 0)
1687 return r;
1688
1689 return 0;
1690}
1691
1692static void link_free_bound_to_list(Link *link) {
1693 Link *bound_to;
0d4ad91d 1694
90e74a66 1695 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1696 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1697
1698 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1699 link_dirty(bound_to);
0d4ad91d
AR		 1700 }
1701
1702 return;
1703}
1704
1705static void link_free_bound_by_list(Link *link) {
1706 Link *bound_by;
0d4ad91d 1707
90e74a66 1708 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1709 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1710
1711 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1712 link_dirty(bound_by);
0d4ad91d
AR		 1713 link_handle_bound_to_list(bound_by);
1714 }
1715 }
1716
1717 return;
1718}
1719
1720static void link_free_carrier_maps(Link *link) {
1721 bool list_updated = false;
1722
1723 assert(link);
1724
1725 if (!hashmap_isempty(link->bound_to_links)) {
1726 link_free_bound_to_list(link);
1727 list_updated = true;
1728 }
1729
1730 if (!hashmap_isempty(link->bound_by_links)) {
1731 link_free_bound_by_list(link);
1732 list_updated = true;
1733 }
1734
1735 if (list_updated)
84de38c5 1736 link_dirty(link);
0d4ad91d
AR		 1737
1738 return;
1739}
1740
5f707e12
YW		 1741static int link_append_to_master(Link *link, NetDev *netdev) {
1742 Link *master;
1743 int r;
1744
1745 assert(link);
1746 assert(netdev);
1747
1748 r = link_get(link->manager, netdev->ifindex, &master);
1749 if (r < 0)
1750 return r;
1751
de7fef4b 1752 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1753 if (r <= 0)
5f707e12
YW		 1754 return r;
1755
1756 link_ref(link);
1757 return 0;
1758}
1759
1760static void link_drop_from_master(Link *link, NetDev *netdev) {
1761 Link *master;
1762
1763 assert(link);
1764
1765 if (!link->manager || !netdev)
1766 return;
1767
1768 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1769 return;
1770
1771 link_unref(set_remove(master->slaves, link));
1772}
1773
1774static void link_detach_from_manager(Link *link) {
1775 if (!link || !link->manager)
1776 return;
1777
1778 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1779 link_clean(link);
1780
1781 /* The following must be called at last. */
1782 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1783 link_unref(link);
1784}
1785
0d4ad91d
AR		 1786void link_drop(Link *link) {
1787 if (!link || link->state == LINK_STATE_LINGER)
1788 return;
1789
1790 link_set_state(link, LINK_STATE_LINGER);
1791
1792 link_free_carrier_maps(link);
1793
5f707e12
YW		 1794 if (link->network) {
1795 link_drop_from_master(link, link->network->bridge);
1796 link_drop_from_master(link, link->network->bond);
1797 }
1798
6a7a4e4d 1799 log_link_debug(link, "Link removed");
0d4ad91d 1800
db2f8a2e 1801 (void) unlink(link->state_file);
c4397d94 1802 link_detach_from_manager(link);
0d4ad91d
AR		 1803}
1804
3f265037 1805static int link_joined(Link *link) {
f882c247
TG		 1806 int r;
1807
ef1ba606 1808 assert(link);
f5be5601 1809 assert(link->network);
dd3efc09 1810
0d4ad91d
AR		 1811 if (!hashmap_isempty(link->bound_to_links)) {
1812 r = link_handle_bound_to_list(link);
1813 if (r < 0)
1814 return r;
1815 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1816 r = link_up(link);
1817 if (r < 0) {
1818 link_enter_failed(link);
1819 return r;
1820 }
ef1ba606 1821 }
f882c247 1822
9ed794a3 1823 if (link->network->bridge) {
e1853b00 1824 r = link_set_bridge(link);
6a7a4e4d
LP		 1825 if (r < 0)
1826 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1827
1828 r = link_append_to_master(link, link->network->bridge);
1829 if (r < 0)
1830 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1831 }
1832
eb64b435 1833 if (link->network->bond) {
7fcee284 1834 r = link_set_bond(link);
eb64b435
SS		 1835 if (r < 0)
1836 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1837
45e11abf 1838 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1839 if (r < 0)
1840 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1841 }
1842
34d7f2c9
YW		 1843 r = link_set_bridge_vlan(link);
1844 if (r < 0)
1845 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1846
c1835a42
RM		 1847 /* Skip setting up addresses until it gets carrier,
1848 or it would try to set addresses twice,
1849 which is bad for non-idempotent steps. */
dad2d78e 1850 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1851 return 0;
1852
b425c3ae 1853 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1854
1855 r = link_acquire_conf(link);
1856 if (r < 0)
1857 return r;
1858
682c65b0 1859 return link_set_static_configs(link);
02b59d57
TG		 1860}
1861
302a796f 1862static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1863 int r;
1864
1746cf2a 1865 assert(link);
ef1ba606 1866 assert(link->network);
34bf3c00 1867 assert(link->enslaving > 0);
02b59d57 1868
313cefa1 1869 link->enslaving--;
52433f6b 1870
5da8149f 1871 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1872 return 1;
1873
1c4baffc 1874 r = sd_netlink_message_get_errno(m);
856f962c 1875 if (r < 0 && r != -EEXIST) {
5ecb131d 1876 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1877 link_enter_failed(link);
1878 return 1;
4ff296b0
YW		 1879 }
1880
1881 log_link_debug(link, "Joined netdev");
02b59d57 1882
34bf3c00 1883 if (link->enslaving == 0) {
4ff296b0
YW		 1884 r = link_joined(link);
1885 if (r < 0)
1886 link_enter_failed(link);
34bf3c00 1887 }
02b59d57
TG		 1888
1889 return 1;
1890}
1891
3f265037 1892static int link_enter_join_netdev(Link *link) {
6a0a2f86 1893 NetDev *netdev;
02b59d57
TG		 1894 int r;
1895
1896 assert(link);
1897 assert(link->network);
bd08ce56 1898 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1899
289e6774 1900 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1901
84de38c5 1902 link_dirty(link);
34bf3c00 1903 link->enslaving = 0;
02b59d57 1904
d9c67ea1 1905 if (link->network->bond) {
cbff7170
TJ		 1906 if (link->network->bond->state == NETDEV_STATE_READY &&
1907 link->network->bond->ifindex == link->master_ifindex)
1908 return link_joined(link);
1909
f2341e0a
LP		 1910 log_struct(LOG_DEBUG,
1911 LOG_LINK_INTERFACE(link),
1912 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1913 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1914
34bf3c00
YW		 1915 link->enslaving++;
1916
f2341e0a 1917 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1918 if (r < 0) {
f2341e0a
LP		 1919 log_struct_errno(LOG_WARNING, r,
1920 LOG_LINK_INTERFACE(link),
1921 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1922 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1923 link_enter_failed(link);
1924 return r;
1925 }
0ad6148e
MO		 1926 }
1927
d9c67ea1 1928 if (link->network->bridge) {
f2341e0a
LP		 1929 log_struct(LOG_DEBUG,
1930 LOG_LINK_INTERFACE(link),
1931 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1932 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1933
34bf3c00
YW		 1934 link->enslaving++;
1935
f2341e0a 1936 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1937 if (r < 0) {
f2341e0a
LP		 1938 log_struct_errno(LOG_WARNING, r,
1939 LOG_LINK_INTERFACE(link),
1940 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1941 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1942 link_enter_failed(link);
1943 return r;
1944 }
52433f6b
TG		 1945 }
1946
6cb955c6
AR		 1947 if (link->network->vrf) {
1948 log_struct(LOG_DEBUG,
1949 LOG_LINK_INTERFACE(link),
1950 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1951 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1952
34bf3c00
YW		 1953 link->enslaving++;
1954
6cb955c6
AR		 1955 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1956 if (r < 0) {
1957 log_struct_errno(LOG_WARNING, r,
1958 LOG_LINK_INTERFACE(link),
1959 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1960 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1961 link_enter_failed(link);
1962 return r;
1963 }
6cb955c6
AR		 1964 }
1965
90e74a66 1966 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1967
2b6db913
YW		 1968 if (netdev->ifindex > 0)
1969 /* Assume already enslaved. */
a63e5daa 1970 continue;
a63e5daa 1971
7033af49
YW		 1972 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1973 continue;
1974
f2341e0a
LP		 1975 log_struct(LOG_DEBUG,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1978 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1979
34bf3c00
YW		 1980 link->enslaving++;
1981
f2341e0a 1982 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1983 if (r < 0) {
f2341e0a
LP		 1984 log_struct_errno(LOG_WARNING, r,
1985 LOG_LINK_INTERFACE(link),
1986 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1987 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1988 link_enter_failed(link);
1989 return r;
1990 }
326cb406
SS		 1991 }
1992
34bf3c00
YW		 1993 if (link->enslaving == 0)
1994 return link_joined(link);
1995
ef1ba606
TG		 1996 return 0;
1997}
1998
5e5b137a 1999static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2000 int r;
2001
f8f2f880
YW		 2002 r = link_drop_foreign_addresses(link);
2003 if (r < 0)
2004 return r;
5e5b137a 2005
59048336
YW		 2006 r = link_drop_foreign_neighbors(link);
2007 if (r < 0)
2008 return r;
d1bdafd2 2009
779804dd 2010 return link_drop_foreign_routes(link);
5e5b137a
TG		 2011}
2012
3104883d 2013static int link_drop_config(Link *link) {
3104883d
SS		 2014 int r;
2015
d7fbb9f5
YW		 2016 r = link_drop_addresses(link);
2017 if (r < 0)
2018 return r;
3104883d 2019
59048336
YW		 2020 r = link_drop_neighbors(link);
2021 if (r < 0)
2022 return r;
d1bdafd2 2023
62f0ea5f
YW		 2024 r = link_drop_routes(link);
2025 if (r < 0)
2026 return r;
3104883d 2027
c69305ff
LP		 2028 ndisc_flush(link);
2029
3104883d
SS		 2030 return 0;
2031}
2032
256c75fd 2033int link_configure(Link *link) {
4ecdcb07
YW		 2034 int r;
2035
ef1ba606 2036 assert(link);
b22d8a00 2037 assert(link->network);
bd08ce56 2038 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2039
34658df2 2040 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2041 if (r < 0)
2042 return r;
2043
518cd6b5
SS		 2044 r = link_configure_sr_iov(link);
2045 if (r < 0)
2046 return r;
2047
500b96eb 2048 if (link->iftype == ARPHRD_CAN)
93ea7750 2049 return link_configure_can(link);
92c918b0 2050
5e0534f1 2051 r = link_set_sysctl(link);
b69c3180
SS		 2052 if (r < 0)
2053 return r;
8749cbcd 2054
5e0534f1 2055 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 2056 if (r < 0)
2057 return r;
2058
e16e4b3b
DS		 2059 r = link_set_mac(link);
2060 if (r < 0)
2061 return r;
2062
2063 r = link_set_nomaster(link);
2064 if (r < 0)
2065 return r;
2066
99d2baa2
SS		 2067 r = link_set_flags(link);
2068 if (r < 0)
2069 return r;
2070
89fe6535
SS		 2071 r = link_set_group(link);
2072 if (r < 0)
2073 return r;
2074
2ffd6d73
YW		 2075 r = ipv4ll_configure(link);
2076 if (r < 0)
2077 return r;
64b21ece 2078
2ffd6d73
YW		 2079 r = dhcp4_configure(link);
2080 if (r < 0)
2081 return r;
eb34d4af 2082
2ffd6d73
YW		 2083 r = dhcp6_configure(link);
2084 if (r < 0)
2085 return r;
f5a8c43f 2086
2ffd6d73
YW		 2087 r = ndisc_configure(link);
2088 if (r < 0)
2089 return r;
4138fb2c 2090
086b8853
YW		 2091 r = radv_configure(link);
2092 if (r < 0)
2093 return r;
7465dd22 2094
2ffd6d73
YW		 2095 r = link_lldp_rx_configure(link);
2096 if (r < 0)
2097 return r;
ce43e484 2098
f6fcc1c2 2099 r = link_configure_mtu(link);
40288ece
YW		 2100 if (r < 0)
2101 return r;
44b598a1 2102
9f6e82e6
YW		 2103 r = link_configure_addrgen_mode(link);
2104 if (r < 0)
2105 return r;
0e2fdb83 2106
3a390124
DS		 2107 return link_configure_continue(link);
2108}
2109
2110/* The configuration continues in this separate function, instead of
2111 * including this in the above link_configure() function, for two
2112 * reasons:
2113 * 1) some devices reset the link when the mtu is set, which caused
2114 * an infinite loop here in networkd; see:
2115 * https://github.com/systemd/systemd/issues/6593
2116 * https://github.com/systemd/systemd/issues/9831
2117 * 2) if ipv6ll is disabled, then bringing the interface up must be
2118 * delayed until after we get confirmation from the kernel that
2119 * the addr_gen_mode parameter has been set (via netlink), see:
2120 * https://github.com/systemd/systemd/issues/13882
2121 */
2122static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2123 int r;
2124
2125 assert(link);
2126 assert(link->network);
bd08ce56 2127 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2128
9524014e 2129 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2130 return 0;
2131
4c649652
DS		 2132 /* Drop foreign config, but ignore loopback or critical devices.
2133 * We do not want to remove loopback address or addresses used for root NFS. */
2134 if (!(link->flags & IFF_LOOPBACK) &&
2135 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2136 r = link_drop_foreign_config(link);
2137 if (r < 0)
2138 return r;
2139 }
2140
d236718c
DS		 2141 /* The kernel resets ipv6 mtu after changing device mtu;
2142 * we must set this here, after we've set device mtu */
2143 r = link_set_ipv6_mtu(link);
2144 if (r < 0)
5e0534f1 2145 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2146
3f265037 2147 return link_enter_join_netdev(link);
505f8da7
TG		 2148}
2149
572b21d9 2150static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2151 Network *network;
2152 int r;
2153
572b21d9
YW		 2154 if (m) {
2155 _cleanup_strv_free_ char **s = NULL;
2156
2157 r = sd_netlink_message_get_errno(m);
2158 if (r < 0)
2159 return r;
2160
2161 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2162 if (r < 0 && r != -ENODATA)
2163 return r;
2164
2165 strv_free_and_replace(link->alternative_names, s);
2166 }
2167
c643bda5
YW		 2168 r = network_get(link->manager, link->iftype, link->sd_device,
2169 link->ifname, link->alternative_names, link->driver,
b8162cd2 2170 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2171 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2172 if (r == -ENOENT) {
2173 link_enter_unmanaged(link);
2174 return 0;
2175 } else if (r == 0 && network->unmanaged) {
2176 link_enter_unmanaged(link);
2177 return 0;
2178 } else if (r < 0)
2179 return r;
2180
99b8517c 2181 if (link->network == network && !force)
ad932b15
YW		 2182 return 0;
2183
2184 log_link_info(link, "Re-configuring with %s", network->filename);
2185
2186 /* Dropping old .network file */
2a99eed0 2187 r = link_stop_engines(link, false);
572b21d9 2188 if (r < 0)
ad932b15 2189 return r;
ad932b15 2190
ad932b15
YW		 2191 r = link_drop_config(link);
2192 if (r < 0)
2193 return r;
2194
2c7b826d 2195 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2196 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2197 r = link_drop_foreign_config(link);
2198 if (r < 0)
2199 return r;
2200 }
2201
2202 link_free_carrier_maps(link);
2203 link_free_engines(link);
2204 link->network = network_unref(link->network);
2205
2206 /* Then, apply new .network file */
2207 r = network_apply(network, link);
2208 if (r < 0)
2209 return r;
2210
2211 r = link_new_carrier_maps(link);
2212 if (r < 0)
2213 return r;
2214
2215 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2216 link_dirty(link);
ad932b15
YW		 2217
2218 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2219 * link_configure() is called later asynchronously. */
2220 r = link_configure_duid(link);
2221 if (r <= 0)
2222 return r;
2223
2224 r = link_configure(link);
2225 if (r < 0)
2226 return r;
2227
2228 return 0;
2229}
2230
572b21d9
YW		 2231static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2232 int r;
2233
2234 r = link_reconfigure_internal(link, m, false);
2235 if (r < 0)
2236 link_enter_failed(link);
2237
2238 return 1;
2239}
2240
2241static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2242 int r;
2243
2244 r = link_reconfigure_internal(link, m, true);
2245 if (r < 0)
2246 link_enter_failed(link);
2247
2248 return 1;
2249}
2250
2251int link_reconfigure(Link *link, bool force) {
2252 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2253 int r;
2254
2c0d7ed3
YW		 2255 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2256 return 0;
2257
572b21d9
YW		 2258 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2259 link->ifindex);
2260 if (r < 0)
2261 return r;
2262
2263 r = netlink_call_async(link->manager->rtnl, NULL, req,
2264 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2265 link_netlink_destroy_callback, link);
2266 if (r < 0)
2267 return r;
2268
2269 link_ref(link);
2270
2271 return 0;
2272}
2273
e6bf7774 2274static int link_initialized_and_synced(Link *link) {
505f8da7 2275 Network *network;
505f8da7
TG		 2276 int r;
2277
2278 assert(link);
2279 assert(link->ifname);
2280 assert(link->manager);
2281
bd08ce56
YW		 2282 /* We may get called either from the asynchronous netlink callback,
2283 * or directly for link_add() if running in a container. See link_add(). */
2284 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2285 return 0;
505f8da7 2286
6a7a4e4d 2287 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2288 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2289
0d4ad91d
AR		 2290 r = link_new_bound_by_list(link);
2291 if (r < 0)
2292 return r;
2293
2294 r = link_handle_bound_by_list(link);
2295 if (r < 0)
2296 return r;
2297
c4a03a56 2298 if (!link->network) {
0894cfe4 2299 r = wifi_get_info(link);
8d968fdd
YW		 2300 if (r < 0)
2301 return r;
2302
c643bda5
YW		 2303 r = network_get(link->manager, link->iftype, link->sd_device,
2304 link->ifname, link->alternative_names, link->driver,
b8162cd2 2305 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2306 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2307 if (r == -ENOENT) {
2308 link_enter_unmanaged(link);
4232cf04 2309 return 0;
a09dc546
DM		 2310 } else if (r == 0 && network->unmanaged) {
2311 link_enter_unmanaged(link);
2312 return 0;
c4a03a56
TG		 2313 } else if (r < 0)
2314 return r;
505f8da7 2315
c4a03a56
TG		 2316 if (link->flags & IFF_LOOPBACK) {
2317 if (network->link_local != ADDRESS_FAMILY_NO)
2318 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2319
c4a03a56
TG		 2320 if (network->dhcp != ADDRESS_FAMILY_NO)
2321 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2322
c4a03a56
TG		 2323 if (network->dhcp_server)
2324 log_link_debug(link, "Ignoring DHCP server for loopback link");
2325 }
bd2efe92 2326
7d342c03 2327 r = network_apply(network, link);
c4a03a56
TG		 2328 if (r < 0)
2329 return r;
2330 }
505f8da7 2331
0d4ad91d
AR		 2332 r = link_new_bound_to_list(link);
2333 if (r < 0)
2334 return r;
2335
27dfc982
YW		 2336 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2337 * link_configure() is called later asynchronously. */
2338 r = link_configure_duid(link);
2339 if (r <= 0)
2340 return r;
2341
a748b692
TG		 2342 r = link_configure(link);
2343 if (r < 0)
2344 return r;
2345
4232cf04 2346 return 0;
505f8da7
TG		 2347}
2348
302a796f 2349static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2350 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2351 int r;
2352
572b21d9
YW		 2353 r = sd_netlink_message_get_errno(m);
2354 if (r < 0) {
40681e5c 2355 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2356 link_enter_failed(link);
2357 return 0;
2358 }
2359
2360 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2361 if (r < 0 && r != -ENODATA) {
2362 link_enter_failed(link);
2363 return 0;
2364 }
2365
2366 strv_free_and_replace(link->alternative_names, s);
2367
4ff296b0
YW		 2368 r = link_initialized_and_synced(link);
2369 if (r < 0)
2370 link_enter_failed(link);
e6bf7774
YW		 2371 return 1;
2372}
2373
51517f9e 2374int link_initialized(Link *link, sd_device *device) {
4afd3348 2375 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2376 int r;
2377
2378 assert(link);
2379 assert(link->manager);
2380 assert(link->manager->rtnl);
2381 assert(device);
2382
8434fd5c 2383 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2384 return 0;
2385
51517f9e 2386 if (link->sd_device)
679b3605
TG		 2387 return 0;
2388
79008bdd 2389 log_link_debug(link, "udev initialized link");
bd08ce56 2390 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2391
51517f9e 2392 link->sd_device = sd_device_ref(device);
4f561e8e 2393
3c9b8860
TG		 2394 /* udev has initialized the link, but we don't know if we have yet
2395 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2396 * when it returns we know that the pending NEWLINKs have already been
2397 * processed and that we are up-to-date */
4f561e8e 2398
3c9b8860
TG		 2399 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2400 link->ifindex);
4f561e8e
TG		 2401 if (r < 0)
2402 return r;
2403
302a796f
YW		 2404 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2405 link_netlink_destroy_callback, link);
4f561e8e
TG		 2406 if (r < 0)
2407 return r;
2408
5da8149f
TG		 2409 link_ref(link);
2410
4f561e8e
TG		 2411 return 0;
2412}
2413
c4a03a56 2414static int link_load(Link *link) {
0bc70f1d
TG		 2415 _cleanup_free_ char *network_file = NULL,
2416 *addresses = NULL,
f703cc2c 2417 *routes = NULL,
0bc70f1d
TG		 2418 *dhcp4_address = NULL,
2419 *ipv4ll_address = NULL;
c4a03a56
TG		 2420 int r;
2421
2422 assert(link);
2423
aa8fbc74 2424 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2425 "NETWORK_FILE", &network_file,
2426 "ADDRESSES", &addresses,
f703cc2c 2427 "ROUTES", &routes,
0bc70f1d 2428 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2429 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2430 if (r < 0 && r != -ENOENT)
2431 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2432
2433 if (network_file) {
2434 Network *network;
2435 char *suffix;
2436
2437 /* drop suffix */
2438 suffix = strrchr(network_file, '.');
2439 if (!suffix) {
2440 log_link_debug(link, "Failed to get network name from %s", network_file);
2441 goto network_file_fail;
2442 }
2443 *suffix = '\0';
2444
2445 r = network_get_by_name(link->manager, basename(network_file), &network);
2446 if (r < 0) {
2447 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2448 goto network_file_fail;
2449 }
2450
7d342c03 2451 r = network_apply(network, link);
c4a03a56
TG		 2452 if (r < 0)
2453 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2454 }
2455
2456network_file_fail:
2457
da4d3a61
YW		 2458 r = link_deserialize_addresses(link, addresses);
2459 if (r < 0)
2460 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2461
731ff05b
YW		 2462 r = link_deserialize_routes(link, routes);
2463 if (r < 0)
2464 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2465
571eeba9
YW		 2466 r = link_deserialize_dhcp4(link, dhcp4_address);
2467 if (r < 0)
2468 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2469
daad60d1
YW		 2470 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2471 if (r < 0)
2472 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2473
c4a03a56
TG		 2474 return 0;
2475}
2476
1c4baffc 2477int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2478 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2479 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2480 Link *link;
5a937ea2 2481 int r;
505f8da7
TG		 2482
2483 assert(m);
fbbeb65a 2484 assert(m->rtnl);
505f8da7
TG		 2485 assert(message);
2486 assert(ret);
2487
2488 r = link_new(m, message, ret);
2489 if (r < 0)
2490 return r;
2491
2492 link = *ret;
2493
6a7a4e4d 2494 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2495
c4a03a56
TG		 2496 r = link_load(link);
2497 if (r < 0)
2498 return r;
2499
bf331d87
YW		 2500 if (path_is_read_only_fs("/sys") <= 0) {
2501 /* udev should be around */
ae06ab10 2502 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2503 r = sd_device_new_from_device_id(&device, ifindex_str);
2504 if (r < 0) {
4d59e14f
YW		 2505 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2506 return 0;
5c416fc4 2507 }
505f8da7 2508
5a937ea2 2509 r = sd_device_get_is_initialized(device);
51517f9e 2510 if (r < 0) {
bf331d87 2511 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2512 goto failed;
2513 }
5a937ea2 2514 if (r == 0) {
505f8da7 2515 /* not yet ready */
79008bdd 2516 log_link_debug(link, "link pending udev initialization...");
505f8da7 2517 return 0;
3c4cb064 2518 }
505f8da7 2519
299ad32d
YW		 2520 r = device_is_renaming(device);
2521 if (r < 0) {
bf331d87 2522 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2523 goto failed;
2524 }
2525 if (r > 0) {
bf331d87 2526 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2527 return 0;
2528 }
2529
4f561e8e
TG		 2530 r = link_initialized(link, device);
2531 if (r < 0)
5c416fc4 2532 goto failed;
4f561e8e 2533 } else {
e6bf7774 2534 r = link_initialized_and_synced(link);
4f561e8e 2535 if (r < 0)
5c416fc4 2536 goto failed;
4f561e8e 2537 }
505f8da7 2538
a748b692 2539 return 0;
5c416fc4
TG		 2540failed:
2541 link_enter_failed(link);
2542 return r;
a748b692
TG		 2543}
2544
c601ebf7 2545int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2546 int r;
2547
2548 assert(link);
2549
2550 log_link_info(link, "Gained IPv6LL");
2551
c601ebf7 2552 link->ipv6ll_address = *address;
e7ab854c
TG		 2553 link_check_ready(link);
2554
b9ea3d2e 2555 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2556 r = link_acquire_ipv6_conf(link);
2557 if (r < 0) {
2558 link_enter_failed(link);
2559 return r;
2560 }
2561 }
2562
2563 return 0;
2564}
2565
9c0a72f9
TG		 2566static int link_carrier_gained(Link *link) {
2567 int r;
2568
2569 assert(link);
2570
0894cfe4 2571 r = wifi_get_info(link);
8d968fdd
YW		 2572 if (r < 0)
2573 return r;
2574 if (r > 0) {
572b21d9
YW		 2575 r = link_reconfigure_internal(link, NULL, false);
2576 if (r < 0) {
2577 link_enter_failed(link);
8d968fdd 2578 return r;
572b21d9 2579 }
8d968fdd
YW		 2580 }
2581
b9ea3d2e 2582 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2583 r = link_acquire_conf(link);
2584 if (r < 0) {
2585 link_enter_failed(link);
2586 return r;
2587 }
6fc25497 2588
b425c3ae 2589 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2590 r = link_set_static_configs(link);
6fc25497
SS		 2591 if (r < 0)
2592 return r;
9c0a72f9
TG		 2593 }
2594
0d4ad91d
AR		 2595 r = link_handle_bound_by_list(link);
2596 if (r < 0)
2597 return r;
2598
1f241589
YW		 2599 if (!link->bridge_mdb_configured) {
2600 r = link_set_bridge_mdb(link);
2601 if (r < 0)
2602 return r;
2603 }
2604
2605 if (streq_ptr(link->kind, "bridge")) {
2606 Link *slave;
2607
2608 SET_FOREACH(slave, link->slaves) {
2609 if (slave->bridge_mdb_configured)
2610 continue;
2611
2612 r = link_set_bridge_mdb(slave);
2613 if (r < 0)
2614 link_enter_failed(slave);
2615 }
2616 }
3db468ea 2617
9c0a72f9
TG		 2618 return 0;
2619}
2620
2621static int link_carrier_lost(Link *link) {
2622 int r;
2623
2624 assert(link);
2625
25e992ba 2626 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2627 return 0;
2628
fbdb6605 2629 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2630 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2631 * configuration and stop the clients as well. */
97e7fb39
SS		 2632 if (link->setting_mtu)
2633 return 0;
2634
2a99eed0 2635 r = link_stop_engines(link, false);
9c0a72f9
TG		 2636 if (r < 0) {
2637 link_enter_failed(link);
2638 return r;
2639 }
2640
3104883d
SS		 2641 r = link_drop_config(link);
2642 if (r < 0)
2643 return r;
2644
2c7b826d 2645 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2646 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2647 r = link_drop_foreign_config(link);
2648 if (r < 0)
2649 return r;
2650 }
3104883d 2651
0d4ad91d
AR		 2652 r = link_handle_bound_by_list(link);
2653 if (r < 0)
2654 return r;
2655
9c0a72f9
TG		 2656 return 0;
2657}
2658
2659int link_carrier_reset(Link *link) {
2660 int r;
2661
2662 assert(link);
2663
2664 if (link_has_carrier(link)) {
2665 r = link_carrier_lost(link);
2666 if (r < 0)
2667 return r;
2668
2669 r = link_carrier_gained(link);
2670 if (r < 0)
2671 return r;
2672
6a7a4e4d 2673 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2674 }
2675
2676 return 0;
2677}
2678
d236718c
DS		 2679/* This is called every time an interface admin state changes to up;
2680 * specifically, when IFF_UP flag changes from unset to set */
2681static int link_admin_state_up(Link *link) {
2682 int r;
2683
2684 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2685 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2686 * ipv6_mtu_set prevents this from trying to set it too early before
2687 * the link->network has been setup; we only need to reset it
2688 * here if we've already set it during normal initialization. */
2689 if (link->ipv6_mtu_set) {
2690 r = link_set_ipv6_mtu(link);
2691 if (r < 0)
2692 return r;
2693 }
2694
2695 return 0;
2696}
2697
1c4baffc 2698int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2699 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2700 hw_addr_data hw_addr;
ca4e095a 2701 const char *ifname;
afe7fd56 2702 uint32_t mtu;
d236718c 2703 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2704 int old_master, r;
22936833 2705
dd3efc09 2706 assert(link);
b8941f74 2707 assert(link->ifname);
22936833
TG		 2708 assert(m);
2709
7619683b 2710 if (link->state == LINK_STATE_LINGER) {
5238e957 2711 log_link_info(link, "Link re-added");
289e6774 2712 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2713
2714 r = link_new_carrier_maps(link);
2715 if (r < 0)
2716 return r;
7619683b
TG		 2717 }
2718
1c4baffc 2719 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2720 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2721 Manager *manager = link->manager;
b8941f74 2722
30de2b89 2723 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2724
30de2b89
YW		 2725 link_drop(link);
2726 r = link_add(manager, m, &link);
2727 if (r < 0)
2728 return r;
b8941f74
TG		 2729 }
2730
572b21d9
YW		 2731 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2732 if (r >= 0)
2733 strv_free_and_replace(link->alternative_names, s);
2734
1c4baffc 2735 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2736 if (r >= 0 && mtu > 0) {
2737 link->mtu = mtu;
4e964aa0 2738 if (link->original_mtu == 0) {
afe7fd56 2739 link->original_mtu = mtu;
6a7a4e4d 2740 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2741 }
2742
2743 if (link->dhcp_client) {
3c9b8860
TG		 2744 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2745 link->mtu);
fc95c359
YW		 2746 if (r < 0)
2747 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2748 }
7465dd22
PF		 2749
2750 if (link->radv) {
2751 r = sd_radv_set_mtu(link->radv, link->mtu);
2752 if (r < 0)
2753 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2754 }
9842de0d 2755 }
69629de9 2756
e9189a1f
TG		 2757 /* The kernel may broadcast NEWLINK messages without the MAC address
2758 set, simply ignore them. */
b8162cd2
TR		 2759 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2760 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2761 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2762
b8162cd2 2763 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2764
b8162cd2 2765 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2766
a3adb4a6
YW		 2767 r = ipv4ll_update_mac(link);
2768 if (r < 0)
2769 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2770
d947f7f9
YW		 2771 r = dhcp4_update_mac(link);
2772 if (r < 0)
2773 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2774
eebba6dc
YW		 2775 r = dhcp6_update_mac(link);
2776 if (r < 0)
2777 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2778
d0c4275c 2779 r = radv_update_mac(link);
be9363cc
YW		 2780 if (r < 0)
2781 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2782
2783 if (link->ndisc) {
b8162cd2 2784 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2785 if (r < 0)
2786 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2787 }
d93d655c
YW		 2788
2789 r = ipv4_dad_update_mac(link);
2790 if (r < 0)
2791 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2792 }
2793
bb262ef0
YW		 2794 old_master = link->master_ifindex;
2795 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2796
d236718c 2797 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2798 had_carrier = link_has_carrier(link);
2799
bb262ef0 2800 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2801 if (r < 0)
2802 return r;
2803
d236718c
DS		 2804 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2805 log_link_info(link, "Link UP");
2806
2807 r = link_admin_state_up(link);
2808 if (r < 0)
2809 return r;
2810 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2811 log_link_info(link, "Link DOWN");
2812
273eec24
LP		 2813 r = link_update_lldp(link);
2814 if (r < 0)
2815 return r;
2816
a61bb41c
TG		 2817 carrier_gained = !had_carrier && link_has_carrier(link);
2818 carrier_lost = had_carrier && !link_has_carrier(link);
2819
2820 if (carrier_gained) {
6a7a4e4d 2821 log_link_info(link, "Gained carrier");
a61bb41c 2822
9c0a72f9
TG		 2823 r = link_carrier_gained(link);
2824 if (r < 0)
2825 return r;
a61bb41c 2826 } else if (carrier_lost) {
6a7a4e4d 2827 log_link_info(link, "Lost carrier");
a61bb41c 2828
9c0a72f9
TG		 2829 r = link_carrier_lost(link);
2830 if (r < 0)
a61bb41c 2831 return r;
a61bb41c
TG		 2832 }
2833
2834 return 0;
dd3efc09 2835}
fe8db0c5 2836
b295beea
LP		 2837static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2838 bool space = false;
b295beea
LP		 2839 Link *link;
2840
2841 assert(f);
2842 assert(prefix);
2843
2844 if (hashmap_isempty(h))
2845 return;
2846
0d536673 2847 fputs(prefix, f);
90e74a66 2848 HASHMAP_FOREACH(link, h) {
b295beea 2849 if (space)
0d536673 2850 fputc(' ', f);
b295beea
LP		 2851
2852 fprintf(f, "%i", link->ifindex);
2853 space = true;
2854 }
2855
0d536673 2856 fputc('\n', f);
b295beea
LP		 2857}
2858
64581765 2859static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2860 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2861 const char *str;
15761549 2862
64581765
YW		 2863 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2864 continue;
2865
e77bd3fd
YW		 2866 str = in_addr_full_to_string(dns[j]);
2867 if (!str)
15761549 2868 continue;
15761549
YW		 2869
2870 if (*space)
2871 fputc(' ', f);
e77bd3fd 2872 fputs(str, f);
15761549
YW		 2873 *space = true;
2874 }
2875}
2876
d5e172d2
ZJS		 2877static void serialize_addresses(
2878 FILE *f,
2879 const char *lvalue,
2880 bool *space,
2881 char **addresses,
2882 sd_dhcp_lease *lease,
2883 bool conditional,
ddb82ec2 2884 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2885 sd_dhcp6_lease *lease6,
2886 bool conditional6,
2887 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2888 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2889 int r;
2890
2891 bool _space = false;
2892 if (!space)
2893 space = &_space;
2894
2895 if (lvalue)
2896 fprintf(f, "%s=", lvalue);
2897 fputstrv(f, addresses, NULL, space);
2898
2899 if (lease && conditional) {
2900 const struct in_addr *lease_addresses;
2901
2902 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2903 if (r > 0)
d8bff5cc 2904 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2905 }
2906
2907 if (lease6 && conditional6 && lease6_get_addr) {
2908 const struct in6_addr *in6_addrs;
2909
2910 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2911 if (r > 0)
2912 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2913 }
2914
2915 if (lease6 && conditional6 && lease6_get_fqdn) {
2916 char **in6_hosts;
2917
2918 r = lease6_get_fqdn(lease6, &in6_hosts);
2919 if (r > 0)
2920 fputstrv(f, in6_hosts, NULL, space);
2921 }
2922
2923 if (lvalue)
2924 fputc('\n', f);
2925}
2926
fe8db0c5 2927int link_save(Link *link) {
d361b373 2928 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2929 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2930 _cleanup_fclose_ FILE *f = NULL;
2931 int r;
2932
2933 assert(link);
2934 assert(link->state_file);
68a8723c 2935 assert(link->lease_file);
bbf7c048
TG		 2936 assert(link->manager);
2937
370e9930 2938 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2939 (void) unlink(link->state_file);
370e9930
TG		 2940 return 0;
2941 }
2942
34437b4f
LP		 2943 link_lldp_save(link);
2944
deb2e523
TG		 2945 admin_state = link_state_to_string(link->state);
2946 assert(admin_state);
2947
e375dcde
TG		 2948 oper_state = link_operstate_to_string(link->operstate);
2949 assert(oper_state);
deb2e523 2950
ac999bf0
YW		 2951 carrier_state = link_carrier_state_to_string(link->carrier_state);
2952 assert(carrier_state);
2953
2954 address_state = link_address_state_to_string(link->address_state);
2955 assert(address_state);
2956
fe8db0c5
TG		 2957 r = fopen_temporary(link->state_file, &f, &temp_path);
2958 if (r < 0)
6a7a4e4d 2959 goto fail;
fe8db0c5 2960
5512a963 2961 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2962
2963 fprintf(f,
2964 "# This is private data. Do not parse.\n"
deb2e523 2965 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2966 "OPER_STATE=%s\n"
2967 "CARRIER_STATE=%s\n"
2968 "ADDRESS_STATE=%s\n",
2969 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2970
bcb7a07e 2971 if (link->network) {
fe0e16db
YW		 2972 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2973 const char *dhcp_domainname = NULL, *p;
fe0e16db 2974 bool space;
07bdc70d 2975
c1a38904
MTL		 2976 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2977 yes_no(link->network->required_for_online));
2978
d5e172d2
ZJS		 2979 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2980 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2981 strempty(link_operstate_to_string(st.min)),
2982 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2983 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2984
adc5b2e2
TG		 2985 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2986
d5e172d2
ZJS		 2987 /************************************************************/
2988
0d536673 2989 fputs("DNS=", f);
ea352b40 2990 space = false;
15761549 2991 if (link->n_dns != (unsigned) -1)
64581765 2992 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2993 else
64581765 2994 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2995
d5e172d2
ZJS		 2996 serialize_addresses(f, NULL, &space,
2997 NULL,
2998 link->dhcp_lease,
2999 link->network->dhcp_use_dns,
ddb82ec2 3000 SD_DHCP_LEASE_DNS,
1633c457 3001 link->dhcp6_lease,
d5e172d2
ZJS		 3002 link->network->dhcp6_use_dns,
3003 sd_dhcp6_lease_get_dns,
3004 NULL);
1e7a0e21 3005
a8c10331 3006 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3007 ndisc_vacuum(link);
3008
b296797f 3009 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3010 NDiscRDNSS *dd;
3011
90e74a66 3012 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3013 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3014 }
3015
3016 fputc('\n', f);
3017
d5e172d2
ZJS		 3018 /************************************************************/
3019
3020 serialize_addresses(f, "NTP", NULL,
3021 link->ntp ?: link->network->ntp,
3022 link->dhcp_lease,
3023 link->network->dhcp_use_ntp,
ddb82ec2 3024 SD_DHCP_LEASE_NTP,
1633c457 3025 link->dhcp6_lease,
d5e172d2
ZJS		 3026 link->network->dhcp6_use_ntp,
3027 sd_dhcp6_lease_get_ntp_addrs,
3028 sd_dhcp6_lease_get_ntp_fqdn);
3029
3030 serialize_addresses(f, "SIP", NULL,
2a71d57f 3031 NULL,
d5e172d2
ZJS		 3032 link->dhcp_lease,
3033 link->network->dhcp_use_sip,
ddb82ec2 3034 SD_DHCP_LEASE_SIP,
2a71d57f 3035 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3036
3037 /************************************************************/
bd8f6538 3038
b2a81c0b 3039 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3040 if (link->dhcp_lease) {
b2a81c0b 3041 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3042 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3043 }
1633c457
YW		 3044 if (link->dhcp6_lease)
3045 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3046 }
3047
fe0e16db
YW		 3048 fputs("DOMAINS=", f);
3049 space = false;
90e74a66 3050 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3051 fputs_with_space(f, p, NULL, &space);
07bdc70d 3052
1e7a0e21 3053 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3054 if (dhcp_domainname)
3055 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3056 if (dhcp_domains)
3057 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3058 if (dhcp6_domains)
3059 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3060 }
3061
3062 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3063 NDiscDNSSL *dd;
1e7a0e21 3064
90e74a66 3065 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3066 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3067 }
b2a81c0b 3068
0d536673 3069 fputc('\n', f);
6192b846 3070
d5e172d2
ZJS		 3071 /************************************************************/
3072
fe0e16db
YW		 3073 fputs("ROUTE_DOMAINS=", f);
3074 space = false;
90e74a66 3075 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3076 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3077
1e7a0e21 3078 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3079 if (dhcp_domainname)
3080 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3081 if (dhcp_domains)
3082 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3083 if (dhcp6_domains)
3084 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3085 }
3086
3087 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3088 NDiscDNSSL *dd;
1e7a0e21 3089
90e74a66 3090 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3091 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3092 }
b2a81c0b 3093
0d536673 3094 fputc('\n', f);
67272d15 3095
d5e172d2
ZJS		 3096 /************************************************************/
3097
3c9b8860 3098 fprintf(f, "LLMNR=%s\n",
15761549 3099 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3100
3101 /************************************************************/
3102
aaa297d4 3103 fprintf(f, "MDNS=%s\n",
15761549 3104 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3105
d5e172d2
ZJS		 3106 /************************************************************/
3107
3108 int dns_default_route =
3109 link->dns_default_route >= 0 ? link->dns_default_route :
3110 link->network->dns_default_route;
3111 if (dns_default_route >= 0)
3112 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3113
3114 /************************************************************/
3115
3116 DnsOverTlsMode dns_over_tls_mode =
3117 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3118 link->network->dns_over_tls_mode;
3119 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3120 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3121
3122 /************************************************************/
3123
3124 DnssecMode dnssec_mode =
3125 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3126 link->network->dnssec_mode;
3127 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3128 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3129
3130 /************************************************************/
3131
3132 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3133 if (set_isempty(nta_anchors))
3134 nta_anchors = link->network->dnssec_negative_trust_anchors;
3135
3136 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3137 const char *n;
3138
0d536673 3139 fputs("DNSSEC_NTA=", f);
8a516214 3140 space = false;
90e74a66 3141 SET_FOREACH(n, nta_anchors)
d390f8ef 3142 fputs_with_space(f, n, NULL, &space);
0d536673 3143 fputc('\n', f);
8a516214
LP		 3144 }
3145
d5e172d2
ZJS		 3146 /************************************************************/
3147
3b31e2b7
YW		 3148 r = link_serialize_addresses(link, f);
3149 if (r < 0)
3150 goto fail;
c1eb9872 3151
d5e172d2
ZJS		 3152 /************************************************************/
3153
56519412
YW		 3154 r = link_serialize_routes(link, f);
3155 if (r < 0)
3156 goto fail;
bcb7a07e 3157 }
7374f9d8 3158
b295beea
LP		 3159 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3160 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3161
8eb9058d 3162 if (link->dhcp_lease) {
bd91b83e 3163 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3164 if (r < 0)
c2d6bd61 3165 goto fail;
fe8db0c5 3166
7374f9d8 3167 fprintf(f,
b0e39c82
TG		 3168 "DHCP_LEASE=%s\n",
3169 link->lease_file);
deb2e523 3170 } else
6990fb6b 3171 (void) unlink(link->lease_file);
fe8db0c5 3172
ca21a19a
YW		 3173 r = link_serialize_ipv4ll(link, f);
3174 if (r < 0)
3175 goto fail;
0bc70f1d 3176
5460bde5
YW		 3177 r = link_serialize_dhcp6_client(link, f);
3178 if (r < 0)
3179 goto fail;
18d8a2cf 3180
c2d6bd61
LP		 3181 r = fflush_and_check(f);
3182 if (r < 0)
3183 goto fail;
fe8db0c5 3184
c2d6bd61 3185 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3186 r = -errno;
c2d6bd61 3187 goto fail;
fe8db0c5
TG		 3188 }
3189
c2d6bd61 3190 return 0;
dacd6cee 3191
c2d6bd61 3192fail:
6a7a4e4d 3193 (void) unlink(link->state_file);
6a7a4e4d
LP		 3194 if (temp_path)
3195 (void) unlink(temp_path);
3196
dacd6cee 3197 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3198}
3199
84de38c5
TG		 3200/* The serialized state in /run is no longer up-to-date. */
3201void link_dirty(Link *link) {
3202 int r;
3203
3204 assert(link);
3205
0c241a37
SS		 3206 /* mark manager dirty as link is dirty */
3207 manager_dirty(link->manager);
3208
de7fef4b 3209 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3210 if (r <= 0)
de7fef4b 3211 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3212 return;
84de38c5
TG		 3213 link_ref(link);
3214}
3215
3216/* The serialized state in /run is up-to-date */
3217void link_clean(Link *link) {
3218 assert(link);
3219 assert(link->manager);
3220
1046bf9b 3221 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3222}
3223
c2a65950
YW		 3224int link_save_and_clean(Link *link) {
3225 int r;
3226
3227 r = link_save(link);
3228 if (r < 0)
3229 return r;
3230
3231 link_clean(link);
3232 return 0;
3233}
3234
fe8db0c5 3235static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3236 [LINK_STATE_PENDING] = "pending",
bd08ce56 3237 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3238 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3239 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3240 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3241 [LINK_STATE_FAILED] = "failed",
370e9930 3242 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3243};
3244
3245DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3246
3247int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3248 const char *err_msg = NULL;
3249
3250 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3251 return log_link_full_errno(link, level, err,
3252 "%s: %s%s%s%m",
3253 msg,
3254 strempty(err_msg),
3255 err_msg && !endswith(err_msg, ".") ? "." : "",
3256 err_msg ? " " : "");
5ecb131d 3257}
Unnamed repository; edit this file 'description' to name the repository.