]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
hwdb: Add support for HP ZBook Studio G5 keyboard (#17525)
[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
14b66dbc
TR		 428 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
429 if (r < 0)
430 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
431
c643bda5 432 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 433 if (r < 0)
434 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
435
c643bda5
YW		 436 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
437 if (r < 0)
438 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
439
572b21d9
YW		 440 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
441 if (r < 0 && r != -ENODATA)
442 return r;
443
34437b4f 444 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 445 return -ENOMEM;
fe8db0c5 446
34437b4f 447 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 448 return -ENOMEM;
449
34437b4f 450 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 451 return -ENOMEM;
452
d5099efc 453 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 454 if (r < 0)
455 return r;
456
457 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 458 if (r < 0)
459 return r;
460
bb262ef0 461 r = link_update_flags(link, message, false);
51d18171
TG		 462 if (r < 0)
463 return r;
464
1cc6c93a 465 *ret = TAKE_PTR(link);
f579559b
TG		 466
467 return 0;
468}
469
15761549
YW		 470void link_ntp_settings_clear(Link *link) {
471 link->ntp = strv_free(link->ntp);
472}
473
474void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 475 if (link->n_dns != (unsigned) -1)
476 for (unsigned i = 0; i < link->n_dns; i++)
477 in_addr_full_free(link->dns[i]);
15761549
YW		 478 link->dns = mfree(link->dns);
479 link->n_dns = (unsigned) -1;
480
481 link->search_domains = ordered_set_free_free(link->search_domains);
482 link->route_domains = ordered_set_free_free(link->route_domains);
483
484 link->dns_default_route = -1;
485 link->llmnr = _RESOLVE_SUPPORT_INVALID;
486 link->mdns = _RESOLVE_SUPPORT_INVALID;
487 link->dnssec_mode = _DNSSEC_MODE_INVALID;
488 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
489
490 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
491}
492
1a6bb31f
YW		 493static void link_free_engines(Link *link) {
494 if (!link)
495 return;
496
497 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
498 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
499 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 500 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 501
502 link->lldp = sd_lldp_unref(link->lldp);
1c494872 503 link_lldp_emit_stop(link);
1a6bb31f
YW		 504
505 ndisc_flush(link);
506
507 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
508 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 509 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 510 link->ndisc = sd_ndisc_unref(link->ndisc);
511 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 512
513 ipv4_dad_unref(link);
1a6bb31f
YW		 514}
515
8301aa0b 516static Link *link_free(Link *link) {
8301aa0b 517 assert(link);
f579559b 518
15761549
YW		 519 link_ntp_settings_clear(link);
520 link_dns_settings_clear(link);
521
8eec0b9d
YW		 522 link->routes = set_free(link->routes);
523 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 524 link->dhcp_routes = set_free(link->dhcp_routes);
525 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 526 link->dhcp6_routes = set_free(link->dhcp6_routes);
527 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
528 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
529 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 530 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 531
8eec0b9d
YW		 532 link->nexthops = set_free(link->nexthops);
533 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 534
8eec0b9d
YW		 535 link->neighbors = set_free(link->neighbors);
536 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 537
8eec0b9d
YW		 538 link->addresses = set_free(link->addresses);
539 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 540 link->pool_addresses = set_free(link->pool_addresses);
e5526518 541 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 542 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
543 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
544 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
545 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 546 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 547
1a6bb31f 548 link_free_engines(link);
68a8723c 549 free(link->lease_file);
49699bac
SS		 550 free(link->lldp_file);
551
c166a070 552 free(link->ifname);
572b21d9 553 strv_free(link->alternative_names);
ceac4078 554 free(link->kind);
8d968fdd 555 free(link->ssid);
c643bda5 556 free(link->driver);
6cad256d 557
db2f8a2e 558 (void) unlink(link->state_file);
fe8db0c5 559 free(link->state_file);
c166a070 560
51517f9e 561 sd_device_unref(link->sd_device);
b5db00e5 562
0d4ad91d 563 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 564 hashmap_free(link->bound_by_links);
565
5f707e12 566 set_free_with_destructor(link->slaves, link_unref);
033295c1 567
c9c908a6
YW		 568 network_unref(link->network);
569
8301aa0b 570 return mfree(link);
14b746f7
TG		 571}
572
8301aa0b 573DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 574
11a7f229
TG		 575int link_get(Manager *m, int ifindex, Link **ret) {
576 Link *link;
11a7f229
TG		 577
578 assert(m);
e856ed00 579 assert(ifindex > 0);
11a7f229
TG		 580 assert(ret);
581
ae06ab10 582 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 583 if (!link)
584 return -ENODEV;
585
586 *ret = link;
587
588 return 0;
589}
590
af9ba57a 591void link_set_state(Link *link, LinkState state) {
e331e246
TG		 592 assert(link);
593
594 if (link->state == state)
595 return;
596
0beb9542
YW		 597 log_link_debug(link, "State changed: %s -> %s",
598 link_state_to_string(link->state),
599 link_state_to_string(state));
600
e331e246
TG		 601 link->state = state;
602
603 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 604}
605
57bd6899
TG		 606static void link_enter_unmanaged(Link *link) {
607 assert(link);
608
e331e246 609 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 610
84de38c5 611 link_dirty(link);
57bd6899
TG		 612}
613
2a99eed0 614int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 615 int r = 0, k;
616
617 assert(link);
618 assert(link->manager);
619 assert(link->manager->event);
620
80060352
ZJS		 621 bool keep_dhcp = may_keep_dhcp &&
622 link->network &&
623 (link->manager->restarting ||
624 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
625
84add3cd 626 if (!keep_dhcp) {
111bb8f9 627 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 628 if (k < 0)
36c7d709 629 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 630 }
631
84add3cd
YW		 632 k = sd_ipv4acd_stop(link->dhcp_acd);
633 if (k < 0)
634 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 635
2a99eed0
YW		 636 k = sd_dhcp_server_stop(link->dhcp_server);
637 if (k < 0)
638 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
639
9cc65242
YW		 640 k = sd_lldp_stop(link->lldp);
641 if (k < 0)
642 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
643
84add3cd
YW		 644 k = sd_ipv4ll_stop(link->ipv4ll);
645 if (k < 0)
646 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 647
490ccbd5 648 k = ipv4_dad_stop(link);
2488e4d9
YW		 649 if (k < 0)
650 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 651
84add3cd
YW		 652 k = sd_dhcp6_client_stop(link->dhcp6_client);
653 if (k < 0)
654 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 655
2ffd6d73
YW		 656 k = dhcp6_pd_remove(link);
657 if (k < 0)
658 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 659
84add3cd
YW		 660 k = sd_ndisc_stop(link->ndisc);
661 if (k < 0)
662 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 663
84add3cd
YW		 664 k = sd_radv_stop(link->radv);
665 if (k < 0)
666 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 667
7272b25e 668 link_lldp_emit_stop(link);
111bb8f9
TG		 669 return r;
670}
671
b22d8a00 672void link_enter_failed(Link *link) {
ef1ba606 673 assert(link);
f882c247 674
370e9930 675 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 676 return;
677
6a7a4e4d 678 log_link_warning(link, "Failed");
449f7554 679
e331e246 680 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 681
2a99eed0 682 (void) link_stop_engines(link, false);
111bb8f9 683
84de38c5 684 link_dirty(link);
f882c247
TG		 685}
686
7033af49
YW		 687static int link_join_netdevs_after_configured(Link *link) {
688 NetDev *netdev;
7033af49
YW		 689 int r;
690
90e74a66 691 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 692 if (netdev->ifindex > 0)
693 /* Assume already enslaved. */
694 continue;
695
696 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
697 continue;
698
699 log_struct(LOG_DEBUG,
700 LOG_LINK_INTERFACE(link),
701 LOG_NETDEV_INTERFACE(netdev),
702 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
703
704 r = netdev_join(netdev, link, NULL);
705 if (r < 0)
706 return log_struct_errno(LOG_WARNING, r,
707 LOG_LINK_INTERFACE(link),
708 LOG_NETDEV_INTERFACE(netdev),
709 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
710 }
711
712 return 0;
713}
714
e3a7b048 715static void link_enter_configured(Link *link) {
dd43110f
TG		 716 assert(link);
717 assert(link->network);
e3a7b048 718
289e6774 719 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 720 return;
dd43110f 721
e331e246 722 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 723
7033af49
YW		 724 (void) link_join_netdevs_after_configured(link);
725
84de38c5 726 link_dirty(link);
dd43110f
TG		 727}
728
6accfd31
DA		 729void link_check_ready(Link *link) {
730 Address *a;
6accfd31
DA		 731
732 assert(link);
733
5f58af25
YW		 734 if (link->state == LINK_STATE_CONFIGURED)
735 return;
736
737 if (link->state != LINK_STATE_CONFIGURING) {
738 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 739 return;
39373cb9 740 }
6accfd31
DA		 741
742 if (!link->network)
743 return;
744
39373cb9
YW		 745 if (!link->addresses_configured) {
746 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 747 return;
39373cb9 748 }
6accfd31 749
39373cb9
YW		 750 if (!link->neighbors_configured) {
751 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 752 return;
39373cb9 753 }
6accfd31 754
90e74a66 755 SET_FOREACH(a, link->addresses)
39373cb9
YW		 756 if (!address_is_ready(a)) {
757 _cleanup_free_ char *str = NULL;
758
759 (void) in_addr_to_string(a->family, &a->in_addr, &str);
760 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 761 return;
39373cb9 762 }
6aa5773b 763
39373cb9
YW		 764 if (!link->static_routes_configured) {
765 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 766 return;
39373cb9 767 }
6accfd31 768
39373cb9
YW		 769 if (!link->static_nexthops_configured) {
770 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 771 return;
39373cb9 772 }
c16c7808 773
39373cb9
YW		 774 if (!link->routing_policy_rules_configured) {
775 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 776 return;
39373cb9 777 }
6accfd31 778
39373cb9
YW		 779 if (!link->tc_configured) {
780 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 781 return;
39373cb9 782 }
4ecdcb07 783
39373cb9
YW		 784 if (!link->sr_iov_configured) {
785 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 786 return;
39373cb9 787 }
518cd6b5 788
1f241589
YW		 789 if (!link->bridge_mdb_configured) {
790 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
791 return;
792 }
793
463797c1 794 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 795 bool has_ndisc_address = false;
796 NDiscAddress *n;
6accfd31 797
1c09d84e 798 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 799 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 800 return;
39373cb9 801 }
6accfd31 802
463797c1 803 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 804 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
805 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 806 return;
39373cb9 807 }
6accfd31 808
90e74a66 809 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 810 if (!n->marked) {
811 has_ndisc_address = true;
812 break;
813 }
814
15797d6a 815 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 816 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 817 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
818 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 819 return;
820 }
821
1633c457 822 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 823 if (!link->dhcp4_configured &&
824 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
825 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 826 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 827 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 828 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
829 * an IPv4ll fallback address must be configured. */
830 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
831 return;
832 }
833
d98c546d 834 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		 835 __func__,
836 yes_no(link->dhcp4_configured),
837 yes_no(link->dhcp6_address_configured),
838 yes_no(link->dhcp6_route_configured),
839 yes_no(link->dhcp6_pd_address_configured),
840 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 841 yes_no(link->ndisc_addresses_configured),
842 yes_no(link->ndisc_routes_configured));
39373cb9 843 }
463797c1 844 }
6accfd31 845
5f58af25 846 link_enter_configured(link);
6accfd31
DA		 847
848 return;
849}
850
682c65b0 851static int link_set_static_configs(Link *link) {
f882c247
TG		 852 int r;
853
854 assert(link);
855 assert(link->network);
f5be5601 856 assert(link->state != _LINK_STATE_INVALID);
f882c247 857
2428613f 858 /* Reset all *_configured flags we are configuring. */
9b966cee 859 link->request_static_addresses = false;
2428613f 860 link->addresses_configured = false;
6aa5773b 861 link->addresses_ready = false;
2428613f
YW		 862 link->neighbors_configured = false;
863 link->static_routes_configured = false;
c16c7808 864 link->static_nexthops_configured = false;
2428613f
YW		 865 link->routing_policy_rules_configured = false;
866
f6bb7ac5
TJ		 867 r = link_set_bridge_fdb(link);
868 if (r < 0)
869 return r;
870
1f241589
YW		 871 r = link_set_bridge_mdb(link);
872 if (r < 0)
873 return r;
874
58f1fe9a 875 r = link_set_neighbors(link);
f3ef324d
YW		 876 if (r < 0)
877 return r;
e4a71bf3 878
682c65b0
YW		 879 r = link_set_addresses(link);
880 if (r < 0)
881 return r;
bd6379ec 882
fe2bc17c
YW		 883 r = link_set_address_labels(link);
884 if (r < 0)
885 return r;
f882c247 886
e5526518 887 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 888 r = dhcp4_server_configure(link);
889 if (r < 0)
890 return r;
d4cdbea5 891
f882c247
TG		 892 return 0;
893}
894
3a390124 895static int link_configure_continue(Link *link);
55dc8c4a 896
e16e4b3b
DS		 897static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
898 int r;
899
900 assert(link);
901
902 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
903 return 1;
904
905 r = sd_netlink_message_get_errno(m);
906 if (r < 0)
907 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
908 else
909 log_link_debug(link, "Setting MAC address done.");
910
911 return 1;
912}
913
914static int link_set_mac(Link *link) {
915 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
916 int r;
917
918 assert(link);
919 assert(link->network);
920 assert(link->manager);
921 assert(link->manager->rtnl);
922
923 if (!link->network->mac)
924 return 0;
925
926 log_link_debug(link, "Setting MAC address");
927
928 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
929 if (r < 0)
930 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
931
932 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
933 if (r < 0)
934 return log_link_error_errno(link, r, "Could not set MAC address: %m");
935
936 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
937 link_netlink_destroy_callback, link);
938 if (r < 0)
939 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
940
941 link_ref(link);
942
943 return 0;
944}
945
946static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
947 int r;
948
949 assert(link);
950
951 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
952 return 1;
953
954 r = sd_netlink_message_get_errno(m);
955 if (r < 0)
956 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
957 else
958 log_link_debug(link, "Setting nomaster done.");
959
960 return 1;
961}
962
963static int link_set_nomaster(Link *link) {
964 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
965 int r;
966
967 assert(link);
968 assert(link->network);
969 assert(link->manager);
970 assert(link->manager->rtnl);
971
972 /* set it free if not enslaved with networkd */
973 if (link->network->bridge || link->network->bond || link->network->vrf)
974 return 0;
975
976 log_link_debug(link, "Setting nomaster");
977
978 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
979 if (r < 0)
980 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
981
982 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
983 if (r < 0)
984 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
985
986 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
987 link_netlink_destroy_callback, link);
988 if (r < 0)
989 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
990
991 link_ref(link);
992
993 return 0;
994}
995
302a796f 996static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 997 int r;
998
999 assert(m);
1000 assert(link);
1001 assert(link->ifname);
1002
55dc8c4a
YW		 1003 link->setting_mtu = false;
1004
5da8149f 1005 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1006 return 1;
1007
1c4baffc 1008 r = sd_netlink_message_get_errno(m);
4ff296b0 1009 if (r < 0)
5ecb131d 1010 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1011 else
1012 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1013
4ff296b0 1014 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1015 r = link_configure_continue(link);
4ff296b0
YW		 1016 if (r < 0)
1017 link_enter_failed(link);
1018 }
4f882b2a
TG		 1019
1020 return 1;
1021}
1022
933c70a0 1023int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1024 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1025 int r;
1026
1027 assert(link);
1028 assert(link->manager);
1029 assert(link->manager->rtnl);
1030
40288ece
YW		 1031 if (mtu == 0 || link->setting_mtu)
1032 return 0;
1033
933c70a0 1034 if (link->mtu == mtu)
ee493106
YW		 1035 return 0;
1036
6a7a4e4d 1037 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1038
6a7a4e4d
LP		 1039 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1040 if (r < 0)
1041 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1042
44b598a1 1043 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1044 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1045 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1046
1047 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1048 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1049
72c2500b 1050 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1051 }
1052
1c4baffc 1053 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1054 if (r < 0)
1055 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1056
302a796f
YW		 1057 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1058 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1059 if (r < 0)
1060 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1061
ae941762 1062 link_ref(link);
1046bf9b 1063 link->setting_mtu = true;
b226d99b 1064
4f882b2a
TG		 1065 return 0;
1066}
1067
f6fcc1c2
YW		 1068static bool link_reduces_vlan_mtu(Link *link) {
1069 /* See netif_reduces_vlan_mtu() in kernel. */
1070 return streq_ptr(link->kind, "macsec");
1071}
1072
1073static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1074 uint32_t mtu = 0;
1075 NetDev *dev;
f6fcc1c2 1076
90e74a66 1077 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1078 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1079 /* See vlan_dev_change_mtu() in kernel. */
1080 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1081
1082 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1083 /* See macvlan_change_mtu() in kernel. */
1084 mtu = dev->mtu;
1085
1086 return mtu;
1087}
1088
1089static int link_configure_mtu(Link *link) {
1090 uint32_t mtu;
1091
1092 assert(link);
1093 assert(link->network);
1094
1095 if (link->network->mtu > 0)
1096 return link_set_mtu(link, link->network->mtu);
1097
1098 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1099 if (link->mtu >= mtu)
1100 return 0;
1101
1102 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1103 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1104 link->mtu, mtu);
1105
1106 return link_set_mtu(link, mtu);
1107}
1108
302a796f 1109static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1110 int r;
1111
1112 assert(m);
1113 assert(link);
1114 assert(link->ifname);
1115
1116 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1117 return 1;
1118
1119 r = sd_netlink_message_get_errno(m);
1120 if (r < 0)
5ecb131d 1121 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1122
1123 return 1;
1124}
1125
1126static int link_set_flags(Link *link) {
1127 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1128 unsigned ifi_change = 0;
1129 unsigned ifi_flags = 0;
1130 int r;
1131
1132 assert(link);
1133 assert(link->manager);
1134 assert(link->manager->rtnl);
1135
1136 if (link->flags & IFF_LOOPBACK)
1137 return 0;
1138
1139 if (!link->network)
1140 return 0;
1141
866e6b7a 1142 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1143 return 0;
1144
1145 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1146 if (r < 0)
1147 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1148
1149 if (link->network->arp >= 0) {
1150 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1151 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1152 }
1153
1154 if (link->network->multicast >= 0) {
1155 ifi_change |= IFF_MULTICAST;
1156 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1157 }
1158
866e6b7a
SS		 1159 if (link->network->allmulticast >= 0) {
1160 ifi_change |= IFF_ALLMULTI;
1161 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1162 }
1163
99d2baa2
SS		 1164 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1165 if (r < 0)
1166 return log_link_error_errno(link, r, "Could not set link flags: %m");
1167
302a796f
YW		 1168 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1169 link_netlink_destroy_callback, link);
99d2baa2
SS		 1170 if (r < 0)
1171 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1172
1173 link_ref(link);
1174
1175 return 0;
1176}
1177
e7ab854c
TG		 1178static int link_acquire_ipv6_conf(Link *link) {
1179 int r;
1180
1181 assert(link);
1182
2ffd6d73 1183 if (link->ndisc) {
e7ab854c
TG		 1184 log_link_debug(link, "Discovering IPv6 routers");
1185
1e7a0e21 1186 r = sd_ndisc_start(link->ndisc);
63348d13 1187 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1188 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1189 }
1190
086b8853 1191 if (link->radv) {
7465dd22
PF		 1192 assert(link->radv);
1193 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1194
1195 log_link_debug(link, "Starting IPv6 Router Advertisements");
1196
fd3ef936
YW		 1197 r = radv_emit_dns(link);
1198 if (r < 0)
1199 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1200
7465dd22
PF		 1201 r = sd_radv_start(link->radv);
1202 if (r < 0 && r != -EBUSY)
1203 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1204 }
1205
838d39af
SS		 1206 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1207 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1208 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1209 assert(link->dhcp6_client);
1210 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1211
838d39af 1212 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1213 if (r < 0 && r != -EBUSY)
1633c457 1214 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1215 else
1216 log_link_debug(link, "Acquiring DHCPv6 lease");
1217 }
1218
1633c457
YW		 1219 r = dhcp6_request_prefix_delegation(link);
1220 if (r < 0)
1221 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1222
e7ab854c
TG		 1223 return 0;
1224}
1225
6fc25497 1226static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1227 int r;
1228
1229 assert(link);
ff254138
TG		 1230 assert(link->manager);
1231 assert(link->manager->event);
1232
910feb78 1233 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1234 assert(link->ipv4ll);
ff254138 1235
6a7a4e4d 1236 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1237
1238 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1239 if (r < 0)
1240 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1241 }
1242
2ffd6d73 1243 if (link->dhcp_client) {
6a7a4e4d 1244 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1245
5c1d3fc9 1246 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1247 if (r < 0)
1248 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1249 }
ff254138 1250
6fc25497
SS		 1251 return 0;
1252}
1253
1254static int link_acquire_conf(Link *link) {
1255 int r;
1256
1257 assert(link);
1258
1259 r = link_acquire_ipv4_conf(link);
1260 if (r < 0)
1261 return r;
1262
3f7cc080 1263 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1264 r = link_acquire_ipv6_conf(link);
1265 if (r < 0)
1266 return r;
1267 }
1268
2ffd6d73
YW		 1269 r = link_lldp_emit_start(link);
1270 if (r < 0)
1271 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1272
ff254138
TG		 1273 return 0;
1274}
1275
a61bb41c 1276bool link_has_carrier(Link *link) {
deb2e523
TG		 1277 /* see Documentation/networking/operstates.txt in the kernel sources */
1278
a61bb41c 1279 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1280 return true;
1281
a61bb41c 1282 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1283 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1284 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1285 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1286 return true;
1287
1288 return false;
1289}
1290
0e2fdb83
SS		 1291static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1292 int r;
1293
1294 assert(link);
1295
9524014e
DS		 1296 link->setting_genmode = false;
1297
0e2fdb83
SS		 1298 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1299 return 1;
1300
1301 r = sd_netlink_message_get_errno(m);
1302 if (r < 0)
5ecb131d 1303 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1304 else
1305 log_link_debug(link, "Setting address genmode done.");
1306
1307 if (link->state == LINK_STATE_INITIALIZED) {
1308 r = link_configure_continue(link);
1309 if (r < 0)
1310 link_enter_failed(link);
1311 }
0e2fdb83
SS		 1312
1313 return 1;
1314}
1315
1316static int link_configure_addrgen_mode(Link *link) {
1317 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1318 uint8_t ipv6ll_mode;
1319 int r;
1320
1321 assert(link);
1322 assert(link->network);
1323 assert(link->manager);
1324 assert(link->manager->rtnl);
1325
9524014e 1326 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1327 return 0;
1328
0e2fdb83
SS		 1329 log_link_debug(link, "Setting address genmode for link");
1330
1331 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1332 if (r < 0)
1333 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1334
1335 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1336 if (r < 0)
1337 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1338
1339 r = sd_netlink_message_open_container(req, AF_INET6);
1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1342
1343 if (!link_ipv6ll_enabled(link))
1344 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1345 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1346 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1347 if (r < 0) {
1348 /* The file may not exist. And even if it exists, when stable_secret is unset,
1349 * reading the file fails with EIO. */
1350 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1351
1352 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1353 } else
1354 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1355 } else
6f6296b9 1356 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1357
1358 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %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 AF_INET6 container: %m");
1365
1366 r = sd_netlink_message_close_container(req);
1367 if (r < 0)
1368 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1369
1370 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1371 link_netlink_destroy_callback, link);
1372 if (r < 0)
1373 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1374
1375 link_ref(link);
9524014e 1376 link->setting_genmode = true;
0e2fdb83
SS		 1377
1378 return 0;
1379}
1380
302a796f 1381static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1382 int r;
1383
1746cf2a
TG		 1384 assert(link);
1385
5da8149f 1386 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1387 return 1;
1388
1c4baffc 1389 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1390 if (r < 0)
26d6b214 1391 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1392 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1393
f882c247
TG		 1394 return 1;
1395}
1396
1cc84f3b 1397static int link_up(Link *link) {
4afd3348 1398 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1399 int r;
1400
f882c247 1401 assert(link);
c106cc36 1402 assert(link->network);
f882c247
TG		 1403 assert(link->manager);
1404 assert(link->manager->rtnl);
1405
6a7a4e4d 1406 log_link_debug(link, "Bringing link up");
449f7554 1407
6a7a4e4d
LP		 1408 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1411
5d4795f3 1412 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1413 if (r < 0)
1414 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1415
302a796f
YW		 1416 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1417 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1418 if (r < 0)
1419 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1420
b226d99b
TG		 1421 link_ref(link);
1422
f882c247
TG		 1423 return 0;
1424}
1425
302a796f 1426static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1427 int r;
1428
1429 assert(link);
1430
1431 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1432 return 1;
1433
1c4baffc 1434 r = sd_netlink_message_get_errno(m);
0d4ad91d 1435 if (r < 0)
5ecb131d 1436 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1437
1438 return 1;
1439}
1440
8e54db83 1441int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1442 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1443 int r;
1444
1445 assert(link);
1446 assert(link->manager);
1447 assert(link->manager->rtnl);
1448
6a7a4e4d 1449 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1450
1451 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1452 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1453 if (r < 0)
1454 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1455
1456 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1457 if (r < 0)
1458 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1459
8e54db83
YW		 1460 r = netlink_call_async(link->manager->rtnl, NULL, req,
1461 callback ?: link_down_handler,
302a796f 1462 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1463 if (r < 0)
1464 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1465
1466 link_ref(link);
1467
1468 return 0;
1469}
1470
89fe6535
SS		 1471static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1472 int r;
1473
1474 assert(link);
1475
1476 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1477 return 1;
1478
1479 r = sd_netlink_message_get_errno(m);
1480 if (r < 0)
1481 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1482
1483 return 1;
1484}
1485
1486static int link_set_group(Link *link) {
1487 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1488 int r;
1489
1490 assert(link);
1491 assert(link->network);
1492 assert(link->manager);
1493 assert(link->manager->rtnl);
1494
1495 if (link->network->group <= 0)
1496 return 0;
1497
1498 log_link_debug(link, "Setting group");
1499
1500 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1503
1504 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1505 if (r < 0)
1506 return log_link_error_errno(link, r, "Could not set link group: %m");
1507
1508 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1509 link_netlink_destroy_callback, link);
1510 if (r < 0)
1511 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1512
1513 link_ref(link);
1514
1515 return 0;
1516}
1517
0d4ad91d
AR		 1518static int link_handle_bound_to_list(Link *link) {
1519 Link *l;
0d4ad91d
AR		 1520 int r;
1521 bool required_up = false;
1522 bool link_is_up = false;
1523
1524 assert(link);
1525
1526 if (hashmap_isempty(link->bound_to_links))
1527 return 0;
1528
1529 if (link->flags & IFF_UP)
1530 link_is_up = true;
1531
90e74a66 1532 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1533 if (link_has_carrier(l)) {
1534 required_up = true;
1535 break;
1536 }
1537
1538 if (!required_up && link_is_up) {
8e54db83 1539 r = link_down(link, NULL);
0d4ad91d
AR		 1540 if (r < 0)
1541 return r;
1542 } else if (required_up && !link_is_up) {
1543 r = link_up(link);
1544 if (r < 0)
1545 return r;
1546 }
1547
1548 return 0;
1549}
1550
1551static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1552 Link *l;
1553 int r;
1554
1555 assert(link);
1556
1557 if (hashmap_isempty(link->bound_by_links))
1558 return 0;
1559
90e74a66 1560 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1561 r = link_handle_bound_to_list(l);
1562 if (r < 0)
1563 return r;
1564 }
1565
1566 return 0;
1567}
1568
1569static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1570 int r;
1571
1572 assert(link);
1573 assert(carrier);
1574
1575 if (link == carrier)
1576 return 0;
1577
1578 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1579 return 0;
1580
1581 r = hashmap_ensure_allocated(h, NULL);
1582 if (r < 0)
1583 return r;
1584
1585 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1586 if (r < 0)
1587 return r;
1588
1589 return 0;
1590}
1591
1592static int link_new_bound_by_list(Link *link) {
1593 Manager *m;
1594 Link *carrier;
0d4ad91d
AR		 1595 int r;
1596 bool list_updated = false;
1597
1598 assert(link);
1599 assert(link->manager);
1600
1601 m = link->manager;
1602
90e74a66 1603 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1604 if (!carrier->network)
1605 continue;
1606
1607 if (strv_isempty(carrier->network->bind_carrier))
1608 continue;
1609
191a3f16 1610 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1611 r = link_put_carrier(link, carrier, &link->bound_by_links);
1612 if (r < 0)
1613 return r;
1614
1615 list_updated = true;
1616 }
1617 }
1618
1619 if (list_updated)
84de38c5 1620 link_dirty(link);
0d4ad91d 1621
90e74a66 1622 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1623 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1624 if (r < 0)
1625 return r;
1626
84de38c5 1627 link_dirty(carrier);
0d4ad91d
AR		 1628 }
1629
1630 return 0;
1631}
1632
1633static int link_new_bound_to_list(Link *link) {
1634 Manager *m;
1635 Link *carrier;
0d4ad91d
AR		 1636 int r;
1637 bool list_updated = false;
1638
1639 assert(link);
1640 assert(link->manager);
1641
1642 if (!link->network)
1643 return 0;
1644
1645 if (strv_isempty(link->network->bind_carrier))
1646 return 0;
1647
1648 m = link->manager;
1649
90e74a66 1650 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1651 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1652 r = link_put_carrier(link, carrier, &link->bound_to_links);
1653 if (r < 0)
1654 return r;
1655
1656 list_updated = true;
1657 }
1658 }
1659
1660 if (list_updated)
84de38c5 1661 link_dirty(link);
0d4ad91d 1662
90e74a66 1663 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1664 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1665 if (r < 0)
1666 return r;
1667
84de38c5 1668 link_dirty(carrier);
0d4ad91d
AR		 1669 }
1670
1671 return 0;
1672}
1673
1674static int link_new_carrier_maps(Link *link) {
1675 int r;
1676
1677 r = link_new_bound_by_list(link);
1678 if (r < 0)
1679 return r;
1680
1681 r = link_handle_bound_by_list(link);
1682 if (r < 0)
1683 return r;
1684
1685 r = link_new_bound_to_list(link);
1686 if (r < 0)
1687 return r;
1688
1689 r = link_handle_bound_to_list(link);
1690 if (r < 0)
1691 return r;
1692
1693 return 0;
1694}
1695
1696static void link_free_bound_to_list(Link *link) {
1697 Link *bound_to;
0d4ad91d 1698
90e74a66 1699 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1700 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1701
1702 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1703 link_dirty(bound_to);
0d4ad91d
AR		 1704 }
1705
1706 return;
1707}
1708
1709static void link_free_bound_by_list(Link *link) {
1710 Link *bound_by;
0d4ad91d 1711
90e74a66 1712 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1713 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1714
1715 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1716 link_dirty(bound_by);
0d4ad91d
AR		 1717 link_handle_bound_to_list(bound_by);
1718 }
1719 }
1720
1721 return;
1722}
1723
1724static void link_free_carrier_maps(Link *link) {
1725 bool list_updated = false;
1726
1727 assert(link);
1728
1729 if (!hashmap_isempty(link->bound_to_links)) {
1730 link_free_bound_to_list(link);
1731 list_updated = true;
1732 }
1733
1734 if (!hashmap_isempty(link->bound_by_links)) {
1735 link_free_bound_by_list(link);
1736 list_updated = true;
1737 }
1738
1739 if (list_updated)
84de38c5 1740 link_dirty(link);
0d4ad91d
AR		 1741
1742 return;
1743}
1744
5f707e12
YW		 1745static int link_append_to_master(Link *link, NetDev *netdev) {
1746 Link *master;
1747 int r;
1748
1749 assert(link);
1750 assert(netdev);
1751
1752 r = link_get(link->manager, netdev->ifindex, &master);
1753 if (r < 0)
1754 return r;
1755
de7fef4b 1756 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1757 if (r <= 0)
5f707e12
YW		 1758 return r;
1759
1760 link_ref(link);
1761 return 0;
1762}
1763
1764static void link_drop_from_master(Link *link, NetDev *netdev) {
1765 Link *master;
1766
1767 assert(link);
1768
1769 if (!link->manager || !netdev)
1770 return;
1771
1772 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1773 return;
1774
1775 link_unref(set_remove(master->slaves, link));
1776}
1777
1778static void link_detach_from_manager(Link *link) {
1779 if (!link || !link->manager)
1780 return;
1781
1782 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1783 link_clean(link);
1784
1785 /* The following must be called at last. */
1786 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1787 link_unref(link);
1788}
1789
0d4ad91d
AR		 1790void link_drop(Link *link) {
1791 if (!link || link->state == LINK_STATE_LINGER)
1792 return;
1793
1794 link_set_state(link, LINK_STATE_LINGER);
1795
1796 link_free_carrier_maps(link);
1797
5f707e12
YW		 1798 if (link->network) {
1799 link_drop_from_master(link, link->network->bridge);
1800 link_drop_from_master(link, link->network->bond);
1801 }
1802
6a7a4e4d 1803 log_link_debug(link, "Link removed");
0d4ad91d 1804
db2f8a2e 1805 (void) unlink(link->state_file);
c4397d94 1806 link_detach_from_manager(link);
0d4ad91d
AR		 1807}
1808
3f265037 1809static int link_joined(Link *link) {
f882c247
TG		 1810 int r;
1811
ef1ba606 1812 assert(link);
f5be5601 1813 assert(link->network);
dd3efc09 1814
0d4ad91d
AR		 1815 if (!hashmap_isempty(link->bound_to_links)) {
1816 r = link_handle_bound_to_list(link);
1817 if (r < 0)
1818 return r;
1819 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1820 r = link_up(link);
1821 if (r < 0) {
1822 link_enter_failed(link);
1823 return r;
1824 }
ef1ba606 1825 }
f882c247 1826
9ed794a3 1827 if (link->network->bridge) {
e1853b00 1828 r = link_set_bridge(link);
6a7a4e4d
LP		 1829 if (r < 0)
1830 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1831
1832 r = link_append_to_master(link, link->network->bridge);
1833 if (r < 0)
1834 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1835 }
1836
eb64b435 1837 if (link->network->bond) {
7fcee284 1838 r = link_set_bond(link);
eb64b435
SS		 1839 if (r < 0)
1840 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1841
45e11abf 1842 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1843 if (r < 0)
1844 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1845 }
1846
34d7f2c9
YW		 1847 r = link_set_bridge_vlan(link);
1848 if (r < 0)
1849 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1850
c1835a42
RM		 1851 /* Skip setting up addresses until it gets carrier,
1852 or it would try to set addresses twice,
1853 which is bad for non-idempotent steps. */
dad2d78e 1854 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1855 return 0;
1856
b425c3ae 1857 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1858
1859 r = link_acquire_conf(link);
1860 if (r < 0)
1861 return r;
1862
682c65b0 1863 return link_set_static_configs(link);
02b59d57
TG		 1864}
1865
302a796f 1866static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1867 int r;
1868
1746cf2a 1869 assert(link);
ef1ba606 1870 assert(link->network);
34bf3c00 1871 assert(link->enslaving > 0);
02b59d57 1872
313cefa1 1873 link->enslaving--;
52433f6b 1874
5da8149f 1875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1876 return 1;
1877
1c4baffc 1878 r = sd_netlink_message_get_errno(m);
856f962c 1879 if (r < 0 && r != -EEXIST) {
5ecb131d 1880 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1881 link_enter_failed(link);
1882 return 1;
4ff296b0
YW		 1883 }
1884
1885 log_link_debug(link, "Joined netdev");
02b59d57 1886
34bf3c00 1887 if (link->enslaving == 0) {
4ff296b0
YW		 1888 r = link_joined(link);
1889 if (r < 0)
1890 link_enter_failed(link);
34bf3c00 1891 }
02b59d57
TG		 1892
1893 return 1;
1894}
1895
3f265037 1896static int link_enter_join_netdev(Link *link) {
6a0a2f86 1897 NetDev *netdev;
02b59d57
TG		 1898 int r;
1899
1900 assert(link);
1901 assert(link->network);
bd08ce56 1902 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1903
289e6774 1904 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1905
84de38c5 1906 link_dirty(link);
34bf3c00 1907 link->enslaving = 0;
02b59d57 1908
d9c67ea1 1909 if (link->network->bond) {
cbff7170
TJ		 1910 if (link->network->bond->state == NETDEV_STATE_READY &&
1911 link->network->bond->ifindex == link->master_ifindex)
1912 return link_joined(link);
1913
f2341e0a
LP		 1914 log_struct(LOG_DEBUG,
1915 LOG_LINK_INTERFACE(link),
1916 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1917 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1918
34bf3c00
YW		 1919 link->enslaving++;
1920
f2341e0a 1921 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1922 if (r < 0) {
f2341e0a
LP		 1923 log_struct_errno(LOG_WARNING, r,
1924 LOG_LINK_INTERFACE(link),
1925 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1926 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1927 link_enter_failed(link);
1928 return r;
1929 }
0ad6148e
MO		 1930 }
1931
d9c67ea1 1932 if (link->network->bridge) {
f2341e0a
LP		 1933 log_struct(LOG_DEBUG,
1934 LOG_LINK_INTERFACE(link),
1935 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1936 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1937
34bf3c00
YW		 1938 link->enslaving++;
1939
f2341e0a 1940 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1941 if (r < 0) {
f2341e0a
LP		 1942 log_struct_errno(LOG_WARNING, r,
1943 LOG_LINK_INTERFACE(link),
1944 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1945 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1946 link_enter_failed(link);
1947 return r;
1948 }
52433f6b
TG		 1949 }
1950
6cb955c6
AR		 1951 if (link->network->vrf) {
1952 log_struct(LOG_DEBUG,
1953 LOG_LINK_INTERFACE(link),
1954 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1955 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1956
34bf3c00
YW		 1957 link->enslaving++;
1958
6cb955c6
AR		 1959 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1960 if (r < 0) {
1961 log_struct_errno(LOG_WARNING, r,
1962 LOG_LINK_INTERFACE(link),
1963 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1964 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1965 link_enter_failed(link);
1966 return r;
1967 }
6cb955c6
AR		 1968 }
1969
90e74a66 1970 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1971
2b6db913
YW		 1972 if (netdev->ifindex > 0)
1973 /* Assume already enslaved. */
a63e5daa 1974 continue;
a63e5daa 1975
7033af49
YW		 1976 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1977 continue;
1978
f2341e0a
LP		 1979 log_struct(LOG_DEBUG,
1980 LOG_LINK_INTERFACE(link),
1981 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1982 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1983
34bf3c00
YW		 1984 link->enslaving++;
1985
f2341e0a 1986 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1987 if (r < 0) {
f2341e0a
LP		 1988 log_struct_errno(LOG_WARNING, r,
1989 LOG_LINK_INTERFACE(link),
1990 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1991 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1992 link_enter_failed(link);
1993 return r;
1994 }
326cb406
SS		 1995 }
1996
34bf3c00
YW		 1997 if (link->enslaving == 0)
1998 return link_joined(link);
1999
ef1ba606
TG		 2000 return 0;
2001}
2002
5e5b137a 2003static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 2004 int r;
2005
f8f2f880
YW		 2006 r = link_drop_foreign_addresses(link);
2007 if (r < 0)
2008 return r;
5e5b137a 2009
59048336
YW		 2010 r = link_drop_foreign_neighbors(link);
2011 if (r < 0)
2012 return r;
d1bdafd2 2013
779804dd 2014 return link_drop_foreign_routes(link);
5e5b137a
TG		 2015}
2016
3104883d 2017static int link_drop_config(Link *link) {
3104883d
SS		 2018 int r;
2019
d7fbb9f5
YW		 2020 r = link_drop_addresses(link);
2021 if (r < 0)
2022 return r;
3104883d 2023
59048336
YW		 2024 r = link_drop_neighbors(link);
2025 if (r < 0)
2026 return r;
d1bdafd2 2027
62f0ea5f
YW		 2028 r = link_drop_routes(link);
2029 if (r < 0)
2030 return r;
3104883d 2031
c69305ff
LP		 2032 ndisc_flush(link);
2033
3104883d
SS		 2034 return 0;
2035}
2036
256c75fd 2037int link_configure(Link *link) {
4ecdcb07
YW		 2038 int r;
2039
ef1ba606 2040 assert(link);
b22d8a00 2041 assert(link->network);
bd08ce56 2042 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2043
34658df2 2044 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2045 if (r < 0)
2046 return r;
2047
518cd6b5
SS		 2048 r = link_configure_sr_iov(link);
2049 if (r < 0)
2050 return r;
2051
500b96eb 2052 if (link->iftype == ARPHRD_CAN)
93ea7750 2053 return link_configure_can(link);
92c918b0 2054
5e0534f1 2055 r = link_set_sysctl(link);
b69c3180
SS		 2056 if (r < 0)
2057 return r;
8749cbcd 2058
5e0534f1 2059 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 2060 if (r < 0)
2061 return r;
2062
e16e4b3b
DS		 2063 r = link_set_mac(link);
2064 if (r < 0)
2065 return r;
2066
2067 r = link_set_nomaster(link);
2068 if (r < 0)
2069 return r;
2070
99d2baa2
SS		 2071 r = link_set_flags(link);
2072 if (r < 0)
2073 return r;
2074
89fe6535
SS		 2075 r = link_set_group(link);
2076 if (r < 0)
2077 return r;
2078
2ffd6d73
YW		 2079 r = ipv4ll_configure(link);
2080 if (r < 0)
2081 return r;
64b21ece 2082
2ffd6d73
YW		 2083 r = dhcp4_configure(link);
2084 if (r < 0)
2085 return r;
eb34d4af 2086
2ffd6d73
YW		 2087 r = dhcp6_configure(link);
2088 if (r < 0)
2089 return r;
f5a8c43f 2090
2ffd6d73
YW		 2091 r = ndisc_configure(link);
2092 if (r < 0)
2093 return r;
4138fb2c 2094
086b8853
YW		 2095 r = radv_configure(link);
2096 if (r < 0)
2097 return r;
7465dd22 2098
2ffd6d73
YW		 2099 r = link_lldp_rx_configure(link);
2100 if (r < 0)
2101 return r;
ce43e484 2102
f6fcc1c2 2103 r = link_configure_mtu(link);
40288ece
YW		 2104 if (r < 0)
2105 return r;
44b598a1 2106
9f6e82e6
YW		 2107 r = link_configure_addrgen_mode(link);
2108 if (r < 0)
2109 return r;
0e2fdb83 2110
3a390124
DS		 2111 return link_configure_continue(link);
2112}
2113
2114/* The configuration continues in this separate function, instead of
2115 * including this in the above link_configure() function, for two
2116 * reasons:
2117 * 1) some devices reset the link when the mtu is set, which caused
2118 * an infinite loop here in networkd; see:
2119 * https://github.com/systemd/systemd/issues/6593
2120 * https://github.com/systemd/systemd/issues/9831
2121 * 2) if ipv6ll is disabled, then bringing the interface up must be
2122 * delayed until after we get confirmation from the kernel that
2123 * the addr_gen_mode parameter has been set (via netlink), see:
2124 * https://github.com/systemd/systemd/issues/13882
2125 */
2126static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2127 int r;
2128
2129 assert(link);
2130 assert(link->network);
bd08ce56 2131 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2132
9524014e 2133 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2134 return 0;
2135
4c649652
DS		 2136 /* Drop foreign config, but ignore loopback or critical devices.
2137 * We do not want to remove loopback address or addresses used for root NFS. */
2138 if (!(link->flags & IFF_LOOPBACK) &&
2139 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2140 r = link_drop_foreign_config(link);
2141 if (r < 0)
2142 return r;
2143 }
2144
d236718c
DS		 2145 /* The kernel resets ipv6 mtu after changing device mtu;
2146 * we must set this here, after we've set device mtu */
2147 r = link_set_ipv6_mtu(link);
2148 if (r < 0)
5e0534f1 2149 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2150
3f265037 2151 return link_enter_join_netdev(link);
505f8da7
TG		 2152}
2153
572b21d9 2154static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2155 Network *network;
2156 int r;
2157
572b21d9
YW		 2158 if (m) {
2159 _cleanup_strv_free_ char **s = NULL;
2160
2161 r = sd_netlink_message_get_errno(m);
2162 if (r < 0)
2163 return r;
2164
2165 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2166 if (r < 0 && r != -ENODATA)
2167 return r;
2168
2169 strv_free_and_replace(link->alternative_names, s);
2170 }
2171
c643bda5
YW		 2172 r = network_get(link->manager, link->iftype, link->sd_device,
2173 link->ifname, link->alternative_names, link->driver,
b8162cd2 2174 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2175 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2176 if (r == -ENOENT) {
2177 link_enter_unmanaged(link);
2178 return 0;
2179 } else if (r == 0 && network->unmanaged) {
2180 link_enter_unmanaged(link);
2181 return 0;
2182 } else if (r < 0)
2183 return r;
2184
99b8517c 2185 if (link->network == network && !force)
ad932b15
YW		 2186 return 0;
2187
2188 log_link_info(link, "Re-configuring with %s", network->filename);
2189
2190 /* Dropping old .network file */
2a99eed0 2191 r = link_stop_engines(link, false);
572b21d9 2192 if (r < 0)
ad932b15 2193 return r;
ad932b15 2194
ad932b15
YW		 2195 r = link_drop_config(link);
2196 if (r < 0)
2197 return r;
2198
2c7b826d 2199 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2200 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2201 r = link_drop_foreign_config(link);
2202 if (r < 0)
2203 return r;
2204 }
2205
2206 link_free_carrier_maps(link);
2207 link_free_engines(link);
2208 link->network = network_unref(link->network);
2209
2210 /* Then, apply new .network file */
2211 r = network_apply(network, link);
2212 if (r < 0)
2213 return r;
2214
2215 r = link_new_carrier_maps(link);
2216 if (r < 0)
2217 return r;
2218
2219 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2220 link_dirty(link);
ad932b15
YW		 2221
2222 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2223 * link_configure() is called later asynchronously. */
2224 r = link_configure_duid(link);
2225 if (r <= 0)
2226 return r;
2227
2228 r = link_configure(link);
2229 if (r < 0)
2230 return r;
2231
2232 return 0;
2233}
2234
572b21d9
YW		 2235static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2236 int r;
2237
2238 r = link_reconfigure_internal(link, m, false);
2239 if (r < 0)
2240 link_enter_failed(link);
2241
2242 return 1;
2243}
2244
2245static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2246 int r;
2247
2248 r = link_reconfigure_internal(link, m, true);
2249 if (r < 0)
2250 link_enter_failed(link);
2251
2252 return 1;
2253}
2254
2255int link_reconfigure(Link *link, bool force) {
2256 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2257 int r;
2258
2c0d7ed3
YW		 2259 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
2260 return 0;
2261
572b21d9
YW		 2262 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2263 link->ifindex);
2264 if (r < 0)
2265 return r;
2266
2267 r = netlink_call_async(link->manager->rtnl, NULL, req,
2268 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2269 link_netlink_destroy_callback, link);
2270 if (r < 0)
2271 return r;
2272
2273 link_ref(link);
2274
2275 return 0;
2276}
2277
e6bf7774 2278static int link_initialized_and_synced(Link *link) {
505f8da7 2279 Network *network;
505f8da7
TG		 2280 int r;
2281
2282 assert(link);
2283 assert(link->ifname);
2284 assert(link->manager);
2285
bd08ce56
YW		 2286 /* We may get called either from the asynchronous netlink callback,
2287 * or directly for link_add() if running in a container. See link_add(). */
2288 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2289 return 0;
505f8da7 2290
6a7a4e4d 2291 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2292 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2293
0d4ad91d
AR		 2294 r = link_new_bound_by_list(link);
2295 if (r < 0)
2296 return r;
2297
2298 r = link_handle_bound_by_list(link);
2299 if (r < 0)
2300 return r;
2301
c4a03a56 2302 if (!link->network) {
0894cfe4 2303 r = wifi_get_info(link);
8d968fdd
YW		 2304 if (r < 0)
2305 return r;
2306
c643bda5
YW		 2307 r = network_get(link->manager, link->iftype, link->sd_device,
2308 link->ifname, link->alternative_names, link->driver,
b8162cd2 2309 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2310 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2311 if (r == -ENOENT) {
2312 link_enter_unmanaged(link);
4232cf04 2313 return 0;
a09dc546
DM		 2314 } else if (r == 0 && network->unmanaged) {
2315 link_enter_unmanaged(link);
2316 return 0;
c4a03a56
TG		 2317 } else if (r < 0)
2318 return r;
505f8da7 2319
c4a03a56
TG		 2320 if (link->flags & IFF_LOOPBACK) {
2321 if (network->link_local != ADDRESS_FAMILY_NO)
2322 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2323
c4a03a56
TG		 2324 if (network->dhcp != ADDRESS_FAMILY_NO)
2325 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2326
c4a03a56
TG		 2327 if (network->dhcp_server)
2328 log_link_debug(link, "Ignoring DHCP server for loopback link");
2329 }
bd2efe92 2330
7d342c03 2331 r = network_apply(network, link);
c4a03a56
TG		 2332 if (r < 0)
2333 return r;
2334 }
505f8da7 2335
0d4ad91d
AR		 2336 r = link_new_bound_to_list(link);
2337 if (r < 0)
2338 return r;
2339
27dfc982
YW		 2340 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2341 * link_configure() is called later asynchronously. */
2342 r = link_configure_duid(link);
2343 if (r <= 0)
2344 return r;
2345
a748b692
TG		 2346 r = link_configure(link);
2347 if (r < 0)
2348 return r;
2349
4232cf04 2350 return 0;
505f8da7
TG		 2351}
2352
302a796f 2353static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2354 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2355 int r;
2356
572b21d9
YW		 2357 r = sd_netlink_message_get_errno(m);
2358 if (r < 0) {
40681e5c 2359 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2360 link_enter_failed(link);
2361 return 0;
2362 }
2363
2364 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2365 if (r < 0 && r != -ENODATA) {
2366 link_enter_failed(link);
2367 return 0;
2368 }
2369
2370 strv_free_and_replace(link->alternative_names, s);
2371
4ff296b0
YW		 2372 r = link_initialized_and_synced(link);
2373 if (r < 0)
2374 link_enter_failed(link);
e6bf7774
YW		 2375 return 1;
2376}
2377
51517f9e 2378int link_initialized(Link *link, sd_device *device) {
4afd3348 2379 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2380 int r;
2381
2382 assert(link);
2383 assert(link->manager);
2384 assert(link->manager->rtnl);
2385 assert(device);
2386
8434fd5c 2387 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2388 return 0;
2389
51517f9e 2390 if (link->sd_device)
679b3605
TG		 2391 return 0;
2392
79008bdd 2393 log_link_debug(link, "udev initialized link");
bd08ce56 2394 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2395
51517f9e 2396 link->sd_device = sd_device_ref(device);
4f561e8e 2397
3c9b8860
TG		 2398 /* udev has initialized the link, but we don't know if we have yet
2399 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2400 * when it returns we know that the pending NEWLINKs have already been
2401 * processed and that we are up-to-date */
4f561e8e 2402
3c9b8860
TG		 2403 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2404 link->ifindex);
4f561e8e
TG		 2405 if (r < 0)
2406 return r;
2407
302a796f
YW		 2408 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2409 link_netlink_destroy_callback, link);
4f561e8e
TG		 2410 if (r < 0)
2411 return r;
2412
5da8149f
TG		 2413 link_ref(link);
2414
4f561e8e
TG		 2415 return 0;
2416}
2417
c4a03a56 2418static int link_load(Link *link) {
0bc70f1d
TG		 2419 _cleanup_free_ char *network_file = NULL,
2420 *addresses = NULL,
f703cc2c 2421 *routes = NULL,
0bc70f1d
TG		 2422 *dhcp4_address = NULL,
2423 *ipv4ll_address = NULL;
c4a03a56
TG		 2424 int r;
2425
2426 assert(link);
2427
aa8fbc74 2428 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 2429 "NETWORK_FILE", &network_file,
2430 "ADDRESSES", &addresses,
f703cc2c 2431 "ROUTES", &routes,
0bc70f1d 2432 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 2433 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 2434 if (r < 0 && r != -ENOENT)
2435 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
2436
2437 if (network_file) {
2438 Network *network;
2439 char *suffix;
2440
2441 /* drop suffix */
2442 suffix = strrchr(network_file, '.');
2443 if (!suffix) {
2444 log_link_debug(link, "Failed to get network name from %s", network_file);
2445 goto network_file_fail;
2446 }
2447 *suffix = '\0';
2448
2449 r = network_get_by_name(link->manager, basename(network_file), &network);
2450 if (r < 0) {
2451 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
2452 goto network_file_fail;
2453 }
2454
7d342c03 2455 r = network_apply(network, link);
c4a03a56
TG		 2456 if (r < 0)
2457 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
2458 }
2459
2460network_file_fail:
2461
da4d3a61
YW		 2462 r = link_deserialize_addresses(link, addresses);
2463 if (r < 0)
2464 log_link_warning_errno(link, r, "Failed to load addresses from %s, ignoring: %m", link->state_file);
74544b4e 2465
731ff05b
YW		 2466 r = link_deserialize_routes(link, routes);
2467 if (r < 0)
2468 log_link_warning_errno(link, r, "Failed to load routes from %s, ignoring: %m", link->state_file);
f703cc2c 2469
571eeba9
YW		 2470 r = link_deserialize_dhcp4(link, dhcp4_address);
2471 if (r < 0)
2472 log_link_warning_errno(link, r, "Failed to load DHCPv4 address from %s, ignoring: %m", link->state_file);
0bc70f1d 2473
daad60d1
YW		 2474 r = link_deserialize_ipv4ll(link, ipv4ll_address);
2475 if (r < 0)
2476 log_link_warning_errno(link, r, "Failed to load IPv4LL address from %s, ignoring: %m", link->state_file);
0bc70f1d 2477
c4a03a56
TG		 2478 return 0;
2479}
2480
1c4baffc 2481int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2482 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2483 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2484 Link *link;
5a937ea2 2485 int r;
505f8da7
TG		 2486
2487 assert(m);
fbbeb65a 2488 assert(m->rtnl);
505f8da7
TG		 2489 assert(message);
2490 assert(ret);
2491
2492 r = link_new(m, message, ret);
2493 if (r < 0)
2494 return r;
2495
2496 link = *ret;
2497
6a7a4e4d 2498 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2499
c4a03a56
TG		 2500 r = link_load(link);
2501 if (r < 0)
2502 return r;
2503
bf331d87
YW		 2504 if (path_is_read_only_fs("/sys") <= 0) {
2505 /* udev should be around */
ae06ab10 2506 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2507 r = sd_device_new_from_device_id(&device, ifindex_str);
2508 if (r < 0) {
4d59e14f
YW		 2509 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2510 return 0;
5c416fc4 2511 }
505f8da7 2512
5a937ea2 2513 r = sd_device_get_is_initialized(device);
51517f9e 2514 if (r < 0) {
bf331d87 2515 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2516 goto failed;
2517 }
5a937ea2 2518 if (r == 0) {
505f8da7 2519 /* not yet ready */
79008bdd 2520 log_link_debug(link, "link pending udev initialization...");
505f8da7 2521 return 0;
3c4cb064 2522 }
505f8da7 2523
299ad32d
YW		 2524 r = device_is_renaming(device);
2525 if (r < 0) {
bf331d87 2526 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2527 goto failed;
2528 }
2529 if (r > 0) {
bf331d87 2530 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2531 return 0;
2532 }
2533
4f561e8e
TG		 2534 r = link_initialized(link, device);
2535 if (r < 0)
5c416fc4 2536 goto failed;
4f561e8e 2537 } else {
e6bf7774 2538 r = link_initialized_and_synced(link);
4f561e8e 2539 if (r < 0)
5c416fc4 2540 goto failed;
4f561e8e 2541 }
505f8da7 2542
a748b692 2543 return 0;
5c416fc4
TG		 2544failed:
2545 link_enter_failed(link);
2546 return r;
a748b692
TG		 2547}
2548
c601ebf7 2549int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2550 int r;
2551
2552 assert(link);
2553
2554 log_link_info(link, "Gained IPv6LL");
2555
c601ebf7 2556 link->ipv6ll_address = *address;
e7ab854c
TG		 2557 link_check_ready(link);
2558
b9ea3d2e 2559 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2560 r = link_acquire_ipv6_conf(link);
2561 if (r < 0) {
2562 link_enter_failed(link);
2563 return r;
2564 }
2565 }
2566
2567 return 0;
2568}
2569
9c0a72f9
TG		 2570static int link_carrier_gained(Link *link) {
2571 int r;
2572
2573 assert(link);
2574
0894cfe4 2575 r = wifi_get_info(link);
8d968fdd
YW		 2576 if (r < 0)
2577 return r;
2578 if (r > 0) {
572b21d9
YW		 2579 r = link_reconfigure_internal(link, NULL, false);
2580 if (r < 0) {
2581 link_enter_failed(link);
8d968fdd 2582 return r;
572b21d9 2583 }
8d968fdd
YW		 2584 }
2585
b9ea3d2e 2586 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2587 r = link_acquire_conf(link);
2588 if (r < 0) {
2589 link_enter_failed(link);
2590 return r;
2591 }
6fc25497 2592
b425c3ae 2593 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2594 r = link_set_static_configs(link);
6fc25497
SS		 2595 if (r < 0)
2596 return r;
9c0a72f9
TG		 2597 }
2598
0d4ad91d
AR		 2599 r = link_handle_bound_by_list(link);
2600 if (r < 0)
2601 return r;
2602
1f241589
YW		 2603 if (!link->bridge_mdb_configured) {
2604 r = link_set_bridge_mdb(link);
2605 if (r < 0)
2606 return r;
2607 }
2608
2609 if (streq_ptr(link->kind, "bridge")) {
2610 Link *slave;
2611
2612 SET_FOREACH(slave, link->slaves) {
2613 if (slave->bridge_mdb_configured)
2614 continue;
2615
2616 r = link_set_bridge_mdb(slave);
2617 if (r < 0)
2618 link_enter_failed(slave);
2619 }
2620 }
3db468ea 2621
9c0a72f9
TG		 2622 return 0;
2623}
2624
2625static int link_carrier_lost(Link *link) {
2626 int r;
2627
2628 assert(link);
2629
25e992ba 2630 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2631 return 0;
2632
fbdb6605 2633 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2634 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2635 * configuration and stop the clients as well. */
97e7fb39
SS		 2636 if (link->setting_mtu)
2637 return 0;
2638
2a99eed0 2639 r = link_stop_engines(link, false);
9c0a72f9
TG		 2640 if (r < 0) {
2641 link_enter_failed(link);
2642 return r;
2643 }
2644
3104883d
SS		 2645 r = link_drop_config(link);
2646 if (r < 0)
2647 return r;
2648
2c7b826d 2649 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2650 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2651 r = link_drop_foreign_config(link);
2652 if (r < 0)
2653 return r;
2654 }
3104883d 2655
0d4ad91d
AR		 2656 r = link_handle_bound_by_list(link);
2657 if (r < 0)
2658 return r;
2659
9c0a72f9
TG		 2660 return 0;
2661}
2662
2663int link_carrier_reset(Link *link) {
2664 int r;
2665
2666 assert(link);
2667
2668 if (link_has_carrier(link)) {
2669 r = link_carrier_lost(link);
2670 if (r < 0)
2671 return r;
2672
2673 r = link_carrier_gained(link);
2674 if (r < 0)
2675 return r;
2676
6a7a4e4d 2677 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2678 }
2679
2680 return 0;
2681}
2682
d236718c
DS		 2683/* This is called every time an interface admin state changes to up;
2684 * specifically, when IFF_UP flag changes from unset to set */
2685static int link_admin_state_up(Link *link) {
2686 int r;
2687
2688 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2689 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2690 * ipv6_mtu_set prevents this from trying to set it too early before
2691 * the link->network has been setup; we only need to reset it
2692 * here if we've already set it during normal initialization. */
2693 if (link->ipv6_mtu_set) {
2694 r = link_set_ipv6_mtu(link);
2695 if (r < 0)
2696 return r;
2697 }
2698
2699 return 0;
2700}
2701
1c4baffc 2702int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2703 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2704 hw_addr_data hw_addr;
ca4e095a 2705 const char *ifname;
afe7fd56 2706 uint32_t mtu;
d236718c 2707 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2708 int old_master, r;
22936833 2709
dd3efc09 2710 assert(link);
b8941f74 2711 assert(link->ifname);
22936833
TG		 2712 assert(m);
2713
7619683b 2714 if (link->state == LINK_STATE_LINGER) {
5238e957 2715 log_link_info(link, "Link re-added");
289e6774 2716 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2717
2718 r = link_new_carrier_maps(link);
2719 if (r < 0)
2720 return r;
7619683b
TG		 2721 }
2722
1c4baffc 2723 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2724 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2725 Manager *manager = link->manager;
b8941f74 2726
30de2b89 2727 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2728
30de2b89
YW		 2729 link_drop(link);
2730 r = link_add(manager, m, &link);
2731 if (r < 0)
2732 return r;
b8941f74
TG		 2733 }
2734
572b21d9
YW		 2735 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2736 if (r >= 0)
2737 strv_free_and_replace(link->alternative_names, s);
2738
1c4baffc 2739 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2740 if (r >= 0 && mtu > 0) {
2741 link->mtu = mtu;
4e964aa0 2742 if (link->original_mtu == 0) {
afe7fd56 2743 link->original_mtu = mtu;
6a7a4e4d 2744 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2745 }
2746
2747 if (link->dhcp_client) {
3c9b8860
TG		 2748 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2749 link->mtu);
fc95c359
YW		 2750 if (r < 0)
2751 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2752 }
7465dd22
PF		 2753
2754 if (link->radv) {
2755 r = sd_radv_set_mtu(link->radv, link->mtu);
2756 if (r < 0)
2757 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2758 }
9842de0d 2759 }
69629de9 2760
e9189a1f
TG		 2761 /* The kernel may broadcast NEWLINK messages without the MAC address
2762 set, simply ignore them. */
b8162cd2
TR		 2763 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2764 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2765 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2766
b8162cd2 2767 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2768
b8162cd2 2769 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2770
a3adb4a6
YW		 2771 r = ipv4ll_update_mac(link);
2772 if (r < 0)
2773 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2774
d947f7f9
YW		 2775 r = dhcp4_update_mac(link);
2776 if (r < 0)
2777 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2778
eebba6dc
YW		 2779 r = dhcp6_update_mac(link);
2780 if (r < 0)
2781 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2782
d0c4275c 2783 r = radv_update_mac(link);
be9363cc
YW		 2784 if (r < 0)
2785 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2786
2787 if (link->ndisc) {
b8162cd2 2788 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2789 if (r < 0)
2790 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2791 }
d93d655c
YW		 2792
2793 r = ipv4_dad_update_mac(link);
2794 if (r < 0)
2795 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2796 }
2797
bb262ef0
YW		 2798 old_master = link->master_ifindex;
2799 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2800
d236718c 2801 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2802 had_carrier = link_has_carrier(link);
2803
bb262ef0 2804 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2805 if (r < 0)
2806 return r;
2807
d236718c
DS		 2808 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2809 log_link_info(link, "Link UP");
2810
2811 r = link_admin_state_up(link);
2812 if (r < 0)
2813 return r;
2814 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2815 log_link_info(link, "Link DOWN");
2816
273eec24
LP		 2817 r = link_update_lldp(link);
2818 if (r < 0)
2819 return r;
2820
a61bb41c
TG		 2821 carrier_gained = !had_carrier && link_has_carrier(link);
2822 carrier_lost = had_carrier && !link_has_carrier(link);
2823
2824 if (carrier_gained) {
6a7a4e4d 2825 log_link_info(link, "Gained carrier");
a61bb41c 2826
9c0a72f9
TG		 2827 r = link_carrier_gained(link);
2828 if (r < 0)
2829 return r;
a61bb41c 2830 } else if (carrier_lost) {
6a7a4e4d 2831 log_link_info(link, "Lost carrier");
a61bb41c 2832
9c0a72f9
TG		 2833 r = link_carrier_lost(link);
2834 if (r < 0)
a61bb41c 2835 return r;
a61bb41c
TG		 2836 }
2837
2838 return 0;
dd3efc09 2839}
fe8db0c5 2840
b295beea
LP		 2841static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2842 bool space = false;
b295beea
LP		 2843 Link *link;
2844
2845 assert(f);
2846 assert(prefix);
2847
2848 if (hashmap_isempty(h))
2849 return;
2850
0d536673 2851 fputs(prefix, f);
90e74a66 2852 HASHMAP_FOREACH(link, h) {
b295beea 2853 if (space)
0d536673 2854 fputc(' ', f);
b295beea
LP		 2855
2856 fprintf(f, "%i", link->ifindex);
2857 space = true;
2858 }
2859
0d536673 2860 fputc('\n', f);
b295beea
LP		 2861}
2862
64581765 2863static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2864 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2865 const char *str;
15761549 2866
64581765
YW		 2867 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2868 continue;
2869
e77bd3fd
YW		 2870 str = in_addr_full_to_string(dns[j]);
2871 if (!str)
15761549 2872 continue;
15761549
YW		 2873
2874 if (*space)
2875 fputc(' ', f);
e77bd3fd 2876 fputs(str, f);
15761549
YW		 2877 *space = true;
2878 }
2879}
2880
d5e172d2
ZJS		 2881static void serialize_addresses(
2882 FILE *f,
2883 const char *lvalue,
2884 bool *space,
2885 char **addresses,
2886 sd_dhcp_lease *lease,
2887 bool conditional,
ddb82ec2 2888 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2889 sd_dhcp6_lease *lease6,
2890 bool conditional6,
2891 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2892 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2893 int r;
2894
2895 bool _space = false;
2896 if (!space)
2897 space = &_space;
2898
2899 if (lvalue)
2900 fprintf(f, "%s=", lvalue);
2901 fputstrv(f, addresses, NULL, space);
2902
2903 if (lease && conditional) {
2904 const struct in_addr *lease_addresses;
2905
2906 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2907 if (r > 0)
d8bff5cc 2908 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2909 }
2910
2911 if (lease6 && conditional6 && lease6_get_addr) {
2912 const struct in6_addr *in6_addrs;
2913
2914 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2915 if (r > 0)
2916 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2917 }
2918
2919 if (lease6 && conditional6 && lease6_get_fqdn) {
2920 char **in6_hosts;
2921
2922 r = lease6_get_fqdn(lease6, &in6_hosts);
2923 if (r > 0)
2924 fputstrv(f, in6_hosts, NULL, space);
2925 }
2926
2927 if (lvalue)
2928 fputc('\n', f);
2929}
2930
fe8db0c5 2931int link_save(Link *link) {
d361b373 2932 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2933 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2934 _cleanup_fclose_ FILE *f = NULL;
2935 int r;
2936
2937 assert(link);
2938 assert(link->state_file);
68a8723c 2939 assert(link->lease_file);
bbf7c048
TG		 2940 assert(link->manager);
2941
370e9930 2942 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2943 (void) unlink(link->state_file);
370e9930
TG		 2944 return 0;
2945 }
2946
34437b4f
LP		 2947 link_lldp_save(link);
2948
deb2e523
TG		 2949 admin_state = link_state_to_string(link->state);
2950 assert(admin_state);
2951
e375dcde
TG		 2952 oper_state = link_operstate_to_string(link->operstate);
2953 assert(oper_state);
deb2e523 2954
ac999bf0
YW		 2955 carrier_state = link_carrier_state_to_string(link->carrier_state);
2956 assert(carrier_state);
2957
2958 address_state = link_address_state_to_string(link->address_state);
2959 assert(address_state);
2960
fe8db0c5
TG		 2961 r = fopen_temporary(link->state_file, &f, &temp_path);
2962 if (r < 0)
6a7a4e4d 2963 goto fail;
fe8db0c5 2964
5512a963 2965 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2966
2967 fprintf(f,
2968 "# This is private data. Do not parse.\n"
deb2e523 2969 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2970 "OPER_STATE=%s\n"
2971 "CARRIER_STATE=%s\n"
2972 "ADDRESS_STATE=%s\n",
2973 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2974
bcb7a07e 2975 if (link->network) {
fe0e16db
YW		 2976 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2977 const char *dhcp_domainname = NULL, *p;
fe0e16db 2978 bool space;
07bdc70d 2979
c1a38904
MTL		 2980 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2981 yes_no(link->network->required_for_online));
2982
d5e172d2
ZJS		 2983 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2984 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2985 strempty(link_operstate_to_string(st.min)),
2986 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2987 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2988
adc5b2e2
TG		 2989 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2990
d5e172d2
ZJS		 2991 /************************************************************/
2992
0d536673 2993 fputs("DNS=", f);
ea352b40 2994 space = false;
15761549 2995 if (link->n_dns != (unsigned) -1)
64581765 2996 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2997 else
64581765 2998 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2999
d5e172d2
ZJS		 3000 serialize_addresses(f, NULL, &space,
3001 NULL,
3002 link->dhcp_lease,
3003 link->network->dhcp_use_dns,
ddb82ec2 3004 SD_DHCP_LEASE_DNS,
1633c457 3005 link->dhcp6_lease,
d5e172d2
ZJS		 3006 link->network->dhcp6_use_dns,
3007 sd_dhcp6_lease_get_dns,
3008 NULL);
1e7a0e21 3009
a8c10331 3010 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 3011 ndisc_vacuum(link);
3012
b296797f 3013 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 3014 NDiscRDNSS *dd;
3015
90e74a66 3016 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 3017 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 3018 }
3019
3020 fputc('\n', f);
3021
d5e172d2
ZJS		 3022 /************************************************************/
3023
3024 serialize_addresses(f, "NTP", NULL,
3025 link->ntp ?: link->network->ntp,
3026 link->dhcp_lease,
3027 link->network->dhcp_use_ntp,
ddb82ec2 3028 SD_DHCP_LEASE_NTP,
1633c457 3029 link->dhcp6_lease,
d5e172d2
ZJS		 3030 link->network->dhcp6_use_ntp,
3031 sd_dhcp6_lease_get_ntp_addrs,
3032 sd_dhcp6_lease_get_ntp_fqdn);
3033
3034 serialize_addresses(f, "SIP", NULL,
2a71d57f 3035 NULL,
d5e172d2
ZJS		 3036 link->dhcp_lease,
3037 link->network->dhcp_use_sip,
ddb82ec2 3038 SD_DHCP_LEASE_SIP,
2a71d57f 3039 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3040
3041 /************************************************************/
bd8f6538 3042
b2a81c0b 3043 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3044 if (link->dhcp_lease) {
b2a81c0b 3045 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3046 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3047 }
1633c457
YW		 3048 if (link->dhcp6_lease)
3049 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3050 }
3051
fe0e16db
YW		 3052 fputs("DOMAINS=", f);
3053 space = false;
90e74a66 3054 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3055 fputs_with_space(f, p, NULL, &space);
07bdc70d 3056
1e7a0e21 3057 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3058 if (dhcp_domainname)
3059 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3060 if (dhcp_domains)
3061 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3062 if (dhcp6_domains)
3063 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3064 }
3065
3066 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3067 NDiscDNSSL *dd;
1e7a0e21 3068
90e74a66 3069 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3070 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3071 }
b2a81c0b 3072
0d536673 3073 fputc('\n', f);
6192b846 3074
d5e172d2
ZJS		 3075 /************************************************************/
3076
fe0e16db
YW		 3077 fputs("ROUTE_DOMAINS=", f);
3078 space = false;
90e74a66 3079 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3080 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3081
1e7a0e21 3082 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3083 if (dhcp_domainname)
3084 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3085 if (dhcp_domains)
3086 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3087 if (dhcp6_domains)
3088 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3089 }
3090
3091 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3092 NDiscDNSSL *dd;
1e7a0e21 3093
90e74a66 3094 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3095 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3096 }
b2a81c0b 3097
0d536673 3098 fputc('\n', f);
67272d15 3099
d5e172d2
ZJS		 3100 /************************************************************/
3101
3c9b8860 3102 fprintf(f, "LLMNR=%s\n",
15761549 3103 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3104
3105 /************************************************************/
3106
aaa297d4 3107 fprintf(f, "MDNS=%s\n",
15761549 3108 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3109
d5e172d2
ZJS		 3110 /************************************************************/
3111
3112 int dns_default_route =
3113 link->dns_default_route >= 0 ? link->dns_default_route :
3114 link->network->dns_default_route;
3115 if (dns_default_route >= 0)
3116 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3117
3118 /************************************************************/
3119
3120 DnsOverTlsMode dns_over_tls_mode =
3121 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3122 link->network->dns_over_tls_mode;
3123 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3124 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3125
3126 /************************************************************/
3127
3128 DnssecMode dnssec_mode =
3129 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3130 link->network->dnssec_mode;
3131 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3132 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3133
3134 /************************************************************/
3135
3136 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3137 if (set_isempty(nta_anchors))
3138 nta_anchors = link->network->dnssec_negative_trust_anchors;
3139
3140 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3141 const char *n;
3142
0d536673 3143 fputs("DNSSEC_NTA=", f);
8a516214 3144 space = false;
90e74a66 3145 SET_FOREACH(n, nta_anchors)
d390f8ef 3146 fputs_with_space(f, n, NULL, &space);
0d536673 3147 fputc('\n', f);
8a516214
LP		 3148 }
3149
d5e172d2
ZJS		 3150 /************************************************************/
3151
3b31e2b7
YW		 3152 r = link_serialize_addresses(link, f);
3153 if (r < 0)
3154 goto fail;
c1eb9872 3155
d5e172d2
ZJS		 3156 /************************************************************/
3157
56519412
YW		 3158 r = link_serialize_routes(link, f);
3159 if (r < 0)
3160 goto fail;
bcb7a07e 3161 }
7374f9d8 3162
b295beea
LP		 3163 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3164 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3165
8eb9058d 3166 if (link->dhcp_lease) {
bd91b83e 3167 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3168 if (r < 0)
c2d6bd61 3169 goto fail;
fe8db0c5 3170
7374f9d8 3171 fprintf(f,
b0e39c82
TG		 3172 "DHCP_LEASE=%s\n",
3173 link->lease_file);
deb2e523 3174 } else
6990fb6b 3175 (void) unlink(link->lease_file);
fe8db0c5 3176
ca21a19a
YW		 3177 r = link_serialize_ipv4ll(link, f);
3178 if (r < 0)
3179 goto fail;
0bc70f1d 3180
5460bde5
YW		 3181 r = link_serialize_dhcp6_client(link, f);
3182 if (r < 0)
3183 goto fail;
18d8a2cf 3184
c2d6bd61
LP		 3185 r = fflush_and_check(f);
3186 if (r < 0)
3187 goto fail;
fe8db0c5 3188
c2d6bd61 3189 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3190 r = -errno;
c2d6bd61 3191 goto fail;
fe8db0c5
TG		 3192 }
3193
c2d6bd61 3194 return 0;
dacd6cee 3195
c2d6bd61 3196fail:
6a7a4e4d 3197 (void) unlink(link->state_file);
6a7a4e4d
LP		 3198 if (temp_path)
3199 (void) unlink(temp_path);
3200
dacd6cee 3201 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3202}
3203
84de38c5
TG		 3204/* The serialized state in /run is no longer up-to-date. */
3205void link_dirty(Link *link) {
3206 int r;
3207
3208 assert(link);
3209
0c241a37
SS		 3210 /* mark manager dirty as link is dirty */
3211 manager_dirty(link->manager);
3212
de7fef4b 3213 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3214 if (r <= 0)
de7fef4b 3215 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3216 return;
84de38c5
TG		 3217 link_ref(link);
3218}
3219
3220/* The serialized state in /run is up-to-date */
3221void link_clean(Link *link) {
3222 assert(link);
3223 assert(link->manager);
3224
1046bf9b 3225 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3226}
3227
c2a65950
YW		 3228int link_save_and_clean(Link *link) {
3229 int r;
3230
3231 r = link_save(link);
3232 if (r < 0)
3233 return r;
3234
3235 link_clean(link);
3236 return 0;
3237}
3238
fe8db0c5 3239static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3240 [LINK_STATE_PENDING] = "pending",
bd08ce56 3241 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3242 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3243 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3244 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3245 [LINK_STATE_FAILED] = "failed",
370e9930 3246 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3247};
3248
3249DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3250
3251int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3252 const char *err_msg = NULL;
3253
3254 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3255 return log_link_full_errno(link, level, err,
3256 "%s: %s%s%s%m",
3257 msg,
3258 strempty(err_msg),
3259 err_msg && !endswith(err_msg, ".") ? "." : "",
3260 err_msg ? " " : "");
5ecb131d 3261}
Unnamed repository; edit this file 'description' to name the repository.