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network: treat rule which has l3mdev flag as created by kernel
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
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
3ca1fab7 58bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 59 assert(link);
60
78c958f8
TG		 61 if (link->flags & IFF_LOOPBACK)
62 return false;
63
64 if (!link->network)
65 return false;
66
500b96eb 67 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 68 return false;
69
98d20a17 70 if (STRPTR_IN_SET(link->kind,
71 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 72 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 73 return false;
74
f410d463
YW		 75 /* L3 or L3S mode do not support ARP. */
76 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
77 return false;
78
f2bfcdb9
YW		 79 if (link->network->bond)
80 return false;
81
3ca1fab7 82 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 83}
84
f8f2f880 85bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 86 assert(link);
87
fa709992
LP		 88 if (!socket_ipv6_is_supported())
89 return false;
90
d0d6a4cd
TG		 91 if (link->flags & IFF_LOOPBACK)
92 return false;
93
94 if (!link->network)
95 return false;
96
500b96eb 97 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 98 return false;
99
100 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 101 return false;
102
f2bfcdb9
YW		 103 if (link->network->bond)
104 return false;
105
e0ee46f2 106 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 107}
108
5e0534f1 109bool link_ipv6_enabled(Link *link) {
439689c6
SS		 110 assert(link);
111
112 if (!socket_ipv6_is_supported())
113 return false;
114
b102cdca 115 if (link->network->bond)
2b00a4e0
TY		 116 return false;
117
500b96eb 118 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 119 return false;
120
4cef7fe3 121 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 122 if (link_ipv6ll_enabled(link))
123 return true;
124
125 if (network_has_static_ipv6_configurations(link->network))
126 return true;
127
128 return false;
439689c6
SS		 129}
130
34bf3c00
YW		 131static bool link_is_enslaved(Link *link) {
132 if (link->flags & IFF_SLAVE)
133 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
134 return true;
135
34bf3c00
YW		 136 if (!link->network)
137 return false;
138
bb262ef0 139 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 140 return true;
141
bb262ef0
YW		 142 /* TODO: add conditions for other netdevs. */
143
34bf3c00
YW		 144 return false;
145}
146
45e11abf
YW		 147static void link_update_master_operstate(Link *link, NetDev *netdev) {
148 Link *master;
149
150 if (!netdev)
151 return;
152
7936917e
YW		 153 if (netdev->ifindex <= 0)
154 return;
155
45e11abf
YW		 156 if (link_get(link->manager, netdev->ifindex, &master) < 0)
157 return;
158
159 link_update_operstate(master, true);
160}
161
162void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 163 LinkOperationalState operstate;
1678fbb3
YW		 164 LinkCarrierState carrier_state;
165 LinkAddressState address_state;
35c5a9ca 166 _cleanup_strv_free_ char **p = NULL;
1678fbb3 167 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 168 bool changed = false;
1678fbb3 169 Address *address;
14153d1b 170
84de38c5
TG		 171 assert(link);
172
173 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 174 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 175 else if (link_has_carrier(link)) {
1678fbb3
YW		 176 if (link_is_enslaved(link))
177 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 178 else
1678fbb3 179 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 180 } else if (link->flags & IFF_UP)
1678fbb3 181 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 182 else
1678fbb3 183 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 184
1678fbb3 185 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 186 Link *slave;
187
90e74a66 188 SET_FOREACH(slave, link->slaves) {
959f65d3 189 link_update_operstate(slave, false);
84de38c5 190
1678fbb3
YW		 191 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
192 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 193 }
959f65d3 194 }
84de38c5 195
90e74a66 196 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 197 if (!address_is_ready(address))
198 continue;
84de38c5 199
1678fbb3
YW		 200 if (address->scope < scope)
201 scope = address->scope;
202 }
84de38c5 203
1678fbb3 204 /* for operstate we also take foreign addresses into account */
90e74a66 205 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 206 if (!address_is_ready(address))
207 continue;
208
209 if (address->scope < scope)
210 scope = address->scope;
211 }
212
213 if (scope < RT_SCOPE_SITE)
214 /* universally accessible addresses found */
215 address_state = LINK_ADDRESS_STATE_ROUTABLE;
216 else if (scope < RT_SCOPE_HOST)
217 /* only link or site local addresses found */
218 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 219 else
1678fbb3
YW		 220 /* no useful addresses found */
221 address_state = LINK_ADDRESS_STATE_OFF;
222
223 /* Mapping of address and carrier state vs operational state
224 * carrier state
225 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
226 * ------------------------------------------------------------------------------
227 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
228 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
229 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
230 */
84de38c5 231
1678fbb3
YW		 232 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
233 operstate = (LinkOperationalState) carrier_state;
234 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
235 operstate = LINK_OPERSTATE_ROUTABLE;
236 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
237 operstate = LINK_OPERSTATE_DEGRADED;
238 else
14153d1b
YW		 239 operstate = LINK_OPERSTATE_ENSLAVED;
240
35c5a9ca
YW		 241 if (link->carrier_state != carrier_state) {
242 link->carrier_state = carrier_state;
243 changed = true;
244 if (strv_extend(&p, "CarrierState") < 0)
245 log_oom();
246 }
959f65d3 247
35c5a9ca
YW		 248 if (link->address_state != address_state) {
249 link->address_state = address_state;
250 changed = true;
251 if (strv_extend(&p, "AddressState") < 0)
252 log_oom();
959f65d3
YW		 253 }
254
84de38c5
TG		 255 if (link->operstate != operstate) {
256 link->operstate = operstate;
35c5a9ca
YW		 257 changed = true;
258 if (strv_extend(&p, "OperationalState") < 0)
259 log_oom();
84de38c5 260 }
959f65d3 261
35c5a9ca
YW		 262 if (p)
263 link_send_changed_strv(link, p);
264 if (changed)
265 link_dirty(link);
266
45e11abf
YW		 267 if (also_update_master && link->network) {
268 link_update_master_operstate(link, link->network->bond);
269 link_update_master_operstate(link, link->network->bridge);
959f65d3 270 }
84de38c5
TG		 271}
272
51d18171
TG		 273#define FLAG_STRING(string, flag, old, new) \
274 (((old ^ new) & flag) \
275 ? ((old & flag) ? (" -" string) : (" +" string)) \
276 : "")
277
bb262ef0 278static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 279 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
280 uint8_t operstate;
281 int r;
282
283 assert(link);
284
285 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 286 if (r < 0)
287 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 288
1c4baffc 289 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 290 if (r < 0)
291 /* if we got a message without operstate, take it to mean
292 the state was unchanged */
293 operstate = link->kernel_operstate;
294
bb262ef0 295 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 296 return 0;
297
298 if (link->flags != flags) {
6a7a4e4d 299 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		 300 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
301 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
302 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
303 FLAG_STRING("UP", IFF_UP, link->flags, flags),
304 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
305 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
306 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
307 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
308 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
309 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
310 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
311 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
312 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
313 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
314 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
315 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
316 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
317 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
318 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
319
320 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
321 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
322 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
323 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
324 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
325 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
326 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
327 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
328
329 /* link flags are currently at most 18 bits, let's align to
330 * printing 20 */
331 if (unknown_flags_added)
79008bdd 332 log_link_debug(link,
6a7a4e4d 333 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 334 unknown_flags_added);
335
336 if (unknown_flags_removed)
79008bdd 337 log_link_debug(link,
6a7a4e4d 338 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 339 unknown_flags_removed);
340 }
341
342 link->flags = flags;
343 link->kernel_operstate = operstate;
344
959f65d3 345 link_update_operstate(link, true);
51d18171
TG		 346
347 return 0;
348}
349
1c4baffc 350static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 351 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 352 const char *ifname, *kind = NULL;
b710e6b6 353 unsigned short iftype;
572b21d9
YW		 354 int r, ifindex;
355 uint16_t type;
f579559b 356
0c2f9b84 357 assert(manager);
505f8da7 358 assert(message);
f579559b
TG		 359 assert(ret);
360
6cad256d
TJ		 361 /* check for link kind */
362 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
363 if (r == 0) {
db2f8a2e 364 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 365 r = sd_netlink_message_exit_container(message);
366 if (r < 0)
367 return r;
368 }
369
1c4baffc 370 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 371 if (r < 0)
372 return r;
373 else if (type != RTM_NEWLINK)
374 return -EINVAL;
375
376 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
377 if (r < 0)
378 return r;
379 else if (ifindex <= 0)
380 return -EINVAL;
381
b710e6b6
LP		 382 r = sd_rtnl_message_link_get_type(message, &iftype);
383 if (r < 0)
384 return r;
385
1c4baffc 386 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 387 if (r < 0)
388 return r;
389
17f9c355 390 link = new(Link, 1);
f579559b
TG		 391 if (!link)
392 return -ENOMEM;
393
17f9c355
YW		 394 *link = (Link) {
395 .n_ref = 1,
396 .manager = manager,
397 .state = LINK_STATE_PENDING,
17f9c355
YW		 398 .ifindex = ifindex,
399 .iftype = iftype,
15761549
YW		 400
401 .n_dns = (unsigned) -1,
402 .dns_default_route = -1,
403 .llmnr = _RESOLVE_SUPPORT_INVALID,
404 .mdns = _RESOLVE_SUPPORT_INVALID,
405 .dnssec_mode = _DNSSEC_MODE_INVALID,
406 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 407 };
408
505f8da7
TG		 409 link->ifname = strdup(ifname);
410 if (!link->ifname)
411 return -ENOMEM;
f579559b 412
6cad256d
TJ		 413 if (kind) {
414 link->kind = strdup(kind);
415 if (!link->kind)
416 return -ENOMEM;
417 }
418
cbff7170
TJ		 419 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
420 if (r < 0)
421 log_link_debug_errno(link, r, "New device has no master, continuing without");
422
b8162cd2 423 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 424 if (r < 0)
b8162cd2 425 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 426
14b66dbc
TR		 427 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
428 if (r < 0)
429 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
430
c643bda5 431 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 432 if (r < 0)
433 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
434
c643bda5
YW		 435 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
436 if (r < 0)
437 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
438
572b21d9
YW		 439 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
440 if (r < 0 && r != -ENODATA)
441 return r;
442
34437b4f 443 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 444 return -ENOMEM;
fe8db0c5 445
34437b4f 446 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 447 return -ENOMEM;
448
34437b4f 449 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 450 return -ENOMEM;
451
d5099efc 452 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 453 if (r < 0)
454 return r;
455
456 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 457 if (r < 0)
458 return r;
459
bb262ef0 460 r = link_update_flags(link, message, false);
51d18171
TG		 461 if (r < 0)
462 return r;
463
1cc6c93a 464 *ret = TAKE_PTR(link);
f579559b
TG		 465
466 return 0;
467}
468
15761549
YW		 469void link_ntp_settings_clear(Link *link) {
470 link->ntp = strv_free(link->ntp);
471}
472
473void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 474 if (link->n_dns != (unsigned) -1)
475 for (unsigned i = 0; i < link->n_dns; i++)
476 in_addr_full_free(link->dns[i]);
15761549
YW		 477 link->dns = mfree(link->dns);
478 link->n_dns = (unsigned) -1;
479
480 link->search_domains = ordered_set_free_free(link->search_domains);
481 link->route_domains = ordered_set_free_free(link->route_domains);
482
483 link->dns_default_route = -1;
484 link->llmnr = _RESOLVE_SUPPORT_INVALID;
485 link->mdns = _RESOLVE_SUPPORT_INVALID;
486 link->dnssec_mode = _DNSSEC_MODE_INVALID;
487 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
488
489 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
490}
491
1a6bb31f
YW		 492static void link_free_engines(Link *link) {
493 if (!link)
494 return;
495
496 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
497 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
498 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 499 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 500
501 link->lldp = sd_lldp_unref(link->lldp);
1c494872 502 link_lldp_emit_stop(link);
1a6bb31f
YW		 503
504 ndisc_flush(link);
505
506 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
507 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 508 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 509 link->ndisc = sd_ndisc_unref(link->ndisc);
510 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 511
512 ipv4_dad_unref(link);
1a6bb31f
YW		 513}
514
8301aa0b 515static Link *link_free(Link *link) {
8301aa0b 516 assert(link);
f579559b 517
15761549
YW		 518 link_ntp_settings_clear(link);
519 link_dns_settings_clear(link);
520
8eec0b9d
YW		 521 link->routes = set_free(link->routes);
522 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 523 link->dhcp_routes = set_free(link->dhcp_routes);
524 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 525 link->dhcp6_routes = set_free(link->dhcp6_routes);
526 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
527 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
528 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 529 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 530
8eec0b9d
YW		 531 link->nexthops = set_free(link->nexthops);
532 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 533
8eec0b9d
YW		 534 link->neighbors = set_free(link->neighbors);
535 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 536
8eec0b9d
YW		 537 link->addresses = set_free(link->addresses);
538 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 539 link->pool_addresses = set_free(link->pool_addresses);
e5526518 540 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 541 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
542 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
543 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
544 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 545 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 546
1a6bb31f 547 link_free_engines(link);
68a8723c 548 free(link->lease_file);
49699bac
SS		 549 free(link->lldp_file);
550
c166a070 551 free(link->ifname);
572b21d9 552 strv_free(link->alternative_names);
ceac4078 553 free(link->kind);
8d968fdd 554 free(link->ssid);
c643bda5 555 free(link->driver);
6cad256d 556
db2f8a2e 557 (void) unlink(link->state_file);
fe8db0c5 558 free(link->state_file);
c166a070 559
51517f9e 560 sd_device_unref(link->sd_device);
b5db00e5 561
0d4ad91d 562 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 563 hashmap_free(link->bound_by_links);
564
5f707e12 565 set_free_with_destructor(link->slaves, link_unref);
033295c1 566
c9c908a6
YW		 567 network_unref(link->network);
568
8301aa0b 569 return mfree(link);
14b746f7
TG		 570}
571
8301aa0b 572DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 573
11a7f229
TG		 574int link_get(Manager *m, int ifindex, Link **ret) {
575 Link *link;
11a7f229
TG		 576
577 assert(m);
e856ed00 578 assert(ifindex > 0);
11a7f229
TG		 579 assert(ret);
580
ae06ab10 581 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 582 if (!link)
583 return -ENODEV;
584
585 *ret = link;
586
587 return 0;
588}
589
af9ba57a 590void link_set_state(Link *link, LinkState state) {
e331e246
TG		 591 assert(link);
592
593 if (link->state == state)
594 return;
595
0beb9542
YW		 596 log_link_debug(link, "State changed: %s -> %s",
597 link_state_to_string(link->state),
598 link_state_to_string(state));
599
e331e246
TG		 600 link->state = state;
601
602 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 603}
604
57bd6899
TG		 605static void link_enter_unmanaged(Link *link) {
606 assert(link);
607
e331e246 608 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 609
84de38c5 610 link_dirty(link);
57bd6899
TG		 611}
612
2a99eed0 613int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 614 int r = 0, k;
615
616 assert(link);
617 assert(link->manager);
618 assert(link->manager->event);
619
80060352
ZJS		 620 bool keep_dhcp = may_keep_dhcp &&
621 link->network &&
622 (link->manager->restarting ||
623 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
624
84add3cd 625 if (!keep_dhcp) {
111bb8f9 626 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 627 if (k < 0)
36c7d709 628 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 629 }
630
84add3cd
YW		 631 k = sd_ipv4acd_stop(link->dhcp_acd);
632 if (k < 0)
633 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 634
2a99eed0
YW		 635 k = sd_dhcp_server_stop(link->dhcp_server);
636 if (k < 0)
637 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
638
9cc65242
YW		 639 k = sd_lldp_stop(link->lldp);
640 if (k < 0)
641 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
642
84add3cd
YW		 643 k = sd_ipv4ll_stop(link->ipv4ll);
644 if (k < 0)
645 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 646
490ccbd5 647 k = ipv4_dad_stop(link);
2488e4d9
YW		 648 if (k < 0)
649 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 650
84add3cd
YW		 651 k = sd_dhcp6_client_stop(link->dhcp6_client);
652 if (k < 0)
653 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 654
2ffd6d73
YW		 655 k = dhcp6_pd_remove(link);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 658
84add3cd
YW		 659 k = sd_ndisc_stop(link->ndisc);
660 if (k < 0)
661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 662
84add3cd
YW		 663 k = sd_radv_stop(link->radv);
664 if (k < 0)
665 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 666
7272b25e 667 link_lldp_emit_stop(link);
111bb8f9
TG		 668 return r;
669}
670
b22d8a00 671void link_enter_failed(Link *link) {
ef1ba606 672 assert(link);
f882c247 673
370e9930 674 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 675 return;
676
6a7a4e4d 677 log_link_warning(link, "Failed");
449f7554 678
e331e246 679 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 680
2a99eed0 681 (void) link_stop_engines(link, false);
111bb8f9 682
84de38c5 683 link_dirty(link);
f882c247
TG		 684}
685
7033af49
YW		 686static int link_join_netdevs_after_configured(Link *link) {
687 NetDev *netdev;
7033af49
YW		 688 int r;
689
90e74a66 690 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 691 if (netdev->ifindex > 0)
692 /* Assume already enslaved. */
693 continue;
694
695 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
696 continue;
697
698 log_struct(LOG_DEBUG,
699 LOG_LINK_INTERFACE(link),
700 LOG_NETDEV_INTERFACE(netdev),
701 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
702
703 r = netdev_join(netdev, link, NULL);
704 if (r < 0)
705 return log_struct_errno(LOG_WARNING, r,
706 LOG_LINK_INTERFACE(link),
707 LOG_NETDEV_INTERFACE(netdev),
708 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
709 }
710
711 return 0;
712}
713
e3a7b048 714static void link_enter_configured(Link *link) {
dd43110f
TG		 715 assert(link);
716 assert(link->network);
e3a7b048 717
289e6774 718 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 719 return;
dd43110f 720
e331e246 721 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 722
7033af49
YW		 723 (void) link_join_netdevs_after_configured(link);
724
84de38c5 725 link_dirty(link);
dd43110f
TG		 726}
727
6accfd31
DA		 728void link_check_ready(Link *link) {
729 Address *a;
6accfd31
DA		 730
731 assert(link);
732
5f58af25
YW		 733 if (link->state == LINK_STATE_CONFIGURED)
734 return;
735
d19b9939
YW		 736 if (link->state != LINK_STATE_CONFIGURING)
737 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 738
739 if (!link->network)
740 return;
741
d19b9939
YW		 742 if (!link->addresses_configured)
743 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 744
d19b9939
YW		 745 if (!link->neighbors_configured)
746 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 747
90e74a66 748 SET_FOREACH(a, link->addresses)
39373cb9
YW		 749 if (!address_is_ready(a)) {
750 _cleanup_free_ char *str = NULL;
751
752 (void) in_addr_to_string(a->family, &a->in_addr, &str);
d19b9939 753 return (void) log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
39373cb9 754 }
6aa5773b 755
d19b9939
YW		 756 if (!link->static_routes_configured)
757 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 758
d19b9939
YW		 759 if (!link->static_nexthops_configured)
760 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 761
d19b9939
YW		 762 if (!link->routing_policy_rules_configured)
763 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 764
d19b9939
YW		 765 if (!link->tc_configured)
766 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 767
d19b9939
YW		 768 if (!link->sr_iov_configured)
769 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 770
d19b9939
YW		 771 if (!link->bridge_mdb_configured)
772 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 773
463797c1 774 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 775 bool has_ndisc_address = false;
776 NDiscAddress *n;
6accfd31 777
463797c1 778 if (link_ipv6ll_enabled(link) &&
d19b9939
YW		 779 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
780 return (void) log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
6accfd31 781
90e74a66 782 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 783 if (!n->marked) {
784 has_ndisc_address = true;
785 break;
786 }
787
0d0799da 788 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 789 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 790 !link->ipv4ll_address_configured)
791 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
792 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 793
0d0799da
YW		 794 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
795 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 796 if (!link->dhcp4_configured &&
797 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
798 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 799 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 800 !link->ipv4ll_address_configured)
801 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 802 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 803
0d0799da 804 log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 805 __func__,
806 yes_no(link->dhcp4_configured),
0d0799da 807 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 808 yes_no(link->dhcp6_address_configured),
809 yes_no(link->dhcp6_route_configured),
810 yes_no(link->dhcp6_pd_address_configured),
811 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 812 yes_no(link->ndisc_addresses_configured),
813 yes_no(link->ndisc_routes_configured));
39373cb9 814 }
463797c1 815 }
6accfd31 816
5f58af25 817 link_enter_configured(link);
6accfd31
DA		 818}
819
682c65b0 820static int link_set_static_configs(Link *link) {
f882c247
TG		 821 int r;
822
823 assert(link);
824 assert(link->network);
f5be5601 825 assert(link->state != _LINK_STATE_INVALID);
f882c247 826
2428613f 827 /* Reset all *_configured flags we are configuring. */
9b966cee 828 link->request_static_addresses = false;
2428613f 829 link->addresses_configured = false;
6aa5773b 830 link->addresses_ready = false;
2428613f
YW		 831 link->neighbors_configured = false;
832 link->static_routes_configured = false;
c16c7808 833 link->static_nexthops_configured = false;
2428613f
YW		 834 link->routing_policy_rules_configured = false;
835
f6bb7ac5
TJ		 836 r = link_set_bridge_fdb(link);
837 if (r < 0)
838 return r;
839
1f241589
YW		 840 r = link_set_bridge_mdb(link);
841 if (r < 0)
842 return r;
843
58f1fe9a 844 r = link_set_neighbors(link);
f3ef324d
YW		 845 if (r < 0)
846 return r;
e4a71bf3 847
682c65b0
YW		 848 r = link_set_addresses(link);
849 if (r < 0)
850 return r;
bd6379ec 851
fe2bc17c
YW		 852 r = link_set_address_labels(link);
853 if (r < 0)
854 return r;
f882c247 855
e5526518 856 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 857 r = dhcp4_server_configure(link);
858 if (r < 0)
859 return r;
d4cdbea5 860
f882c247
TG		 861 return 0;
862}
863
3a390124 864static int link_configure_continue(Link *link);
55dc8c4a 865
e16e4b3b
DS		 866static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
867 int r;
868
869 assert(link);
870
871 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
872 return 1;
873
874 r = sd_netlink_message_get_errno(m);
875 if (r < 0)
876 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
877 else
878 log_link_debug(link, "Setting MAC address done.");
879
880 return 1;
881}
882
883static int link_set_mac(Link *link) {
884 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
885 int r;
886
887 assert(link);
888 assert(link->network);
889 assert(link->manager);
890 assert(link->manager->rtnl);
891
892 if (!link->network->mac)
893 return 0;
894
895 log_link_debug(link, "Setting MAC address");
896
897 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
898 if (r < 0)
899 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
900
901 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
902 if (r < 0)
903 return log_link_error_errno(link, r, "Could not set MAC address: %m");
904
905 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
906 link_netlink_destroy_callback, link);
907 if (r < 0)
908 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
909
910 link_ref(link);
911
912 return 0;
913}
914
915static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
916 int r;
917
918 assert(link);
919
920 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
921 return 1;
922
923 r = sd_netlink_message_get_errno(m);
924 if (r < 0)
925 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
926 else
927 log_link_debug(link, "Setting nomaster done.");
928
929 return 1;
930}
931
932static int link_set_nomaster(Link *link) {
933 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
934 int r;
935
936 assert(link);
937 assert(link->network);
938 assert(link->manager);
939 assert(link->manager->rtnl);
940
941 /* set it free if not enslaved with networkd */
942 if (link->network->bridge || link->network->bond || link->network->vrf)
943 return 0;
944
945 log_link_debug(link, "Setting nomaster");
946
947 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
948 if (r < 0)
949 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
950
951 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
952 if (r < 0)
953 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
954
955 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
956 link_netlink_destroy_callback, link);
957 if (r < 0)
958 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
959
960 link_ref(link);
961
962 return 0;
963}
964
302a796f 965static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 966 int r;
967
968 assert(m);
969 assert(link);
970 assert(link->ifname);
971
55dc8c4a
YW		 972 link->setting_mtu = false;
973
5da8149f 974 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 975 return 1;
976
1c4baffc 977 r = sd_netlink_message_get_errno(m);
4ff296b0 978 if (r < 0)
5ecb131d 979 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 980 else
981 log_link_debug(link, "Setting MTU done.");
55dc8c4a 982
4ff296b0 983 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 984 r = link_configure_continue(link);
4ff296b0
YW		 985 if (r < 0)
986 link_enter_failed(link);
987 }
4f882b2a
TG		 988
989 return 1;
990}
991
933c70a0 992int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 993 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 994 int r;
995
996 assert(link);
997 assert(link->manager);
998 assert(link->manager->rtnl);
999
40288ece
YW		 1000 if (mtu == 0 || link->setting_mtu)
1001 return 0;
1002
933c70a0 1003 if (link->mtu == mtu)
ee493106
YW		 1004 return 0;
1005
6a7a4e4d 1006 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1007
6a7a4e4d
LP		 1008 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1009 if (r < 0)
1010 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1011
44b598a1 1012 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1013 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1014 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1015
1016 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1017 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1018
72c2500b 1019 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1020 }
1021
1c4baffc 1022 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1023 if (r < 0)
1024 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1025
302a796f
YW		 1026 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1027 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1028 if (r < 0)
1029 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1030
ae941762 1031 link_ref(link);
1046bf9b 1032 link->setting_mtu = true;
b226d99b 1033
4f882b2a
TG		 1034 return 0;
1035}
1036
f6fcc1c2
YW		 1037static bool link_reduces_vlan_mtu(Link *link) {
1038 /* See netif_reduces_vlan_mtu() in kernel. */
1039 return streq_ptr(link->kind, "macsec");
1040}
1041
1042static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1043 uint32_t mtu = 0;
1044 NetDev *dev;
f6fcc1c2 1045
90e74a66 1046 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1047 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1048 /* See vlan_dev_change_mtu() in kernel. */
1049 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1050
1051 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1052 /* See macvlan_change_mtu() in kernel. */
1053 mtu = dev->mtu;
1054
1055 return mtu;
1056}
1057
1058static int link_configure_mtu(Link *link) {
1059 uint32_t mtu;
1060
1061 assert(link);
1062 assert(link->network);
1063
1064 if (link->network->mtu > 0)
1065 return link_set_mtu(link, link->network->mtu);
1066
1067 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1068 if (link->mtu >= mtu)
1069 return 0;
1070
1071 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1072 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1073 link->mtu, mtu);
1074
1075 return link_set_mtu(link, mtu);
1076}
1077
302a796f 1078static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1079 int r;
1080
1081 assert(m);
1082 assert(link);
1083 assert(link->ifname);
1084
1085 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1086 return 1;
1087
1088 r = sd_netlink_message_get_errno(m);
1089 if (r < 0)
5ecb131d 1090 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1091
1092 return 1;
1093}
1094
1095static int link_set_flags(Link *link) {
1096 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1097 unsigned ifi_change = 0;
1098 unsigned ifi_flags = 0;
1099 int r;
1100
1101 assert(link);
1102 assert(link->manager);
1103 assert(link->manager->rtnl);
1104
1105 if (link->flags & IFF_LOOPBACK)
1106 return 0;
1107
1108 if (!link->network)
1109 return 0;
1110
937e305e
SS		 1111 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1112 link->network->promiscuous < 0)
99d2baa2
SS		 1113 return 0;
1114
1115 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1116 if (r < 0)
1117 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1118
1119 if (link->network->arp >= 0) {
1120 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1121 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1122 }
1123
1124 if (link->network->multicast >= 0) {
1125 ifi_change |= IFF_MULTICAST;
1126 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1127 }
1128
866e6b7a
SS		 1129 if (link->network->allmulticast >= 0) {
1130 ifi_change |= IFF_ALLMULTI;
1131 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1132 }
1133
937e305e
SS		 1134 if (link->network->promiscuous >= 0) {
1135 ifi_change |= IFF_PROMISC;
1136 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1137 }
1138
99d2baa2
SS		 1139 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1140 if (r < 0)
1141 return log_link_error_errno(link, r, "Could not set link flags: %m");
1142
302a796f
YW		 1143 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1144 link_netlink_destroy_callback, link);
99d2baa2
SS		 1145 if (r < 0)
1146 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1147
1148 link_ref(link);
1149
1150 return 0;
1151}
1152
e7ab854c
TG		 1153static int link_acquire_ipv6_conf(Link *link) {
1154 int r;
1155
1156 assert(link);
1157
2ffd6d73 1158 if (link->ndisc) {
e7ab854c
TG		 1159 log_link_debug(link, "Discovering IPv6 routers");
1160
1e7a0e21 1161 r = sd_ndisc_start(link->ndisc);
63348d13 1162 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1163 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1164 }
1165
086b8853 1166 if (link->radv) {
7465dd22
PF		 1167 assert(link->radv);
1168 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1169
1170 log_link_debug(link, "Starting IPv6 Router Advertisements");
1171
fd3ef936
YW		 1172 r = radv_emit_dns(link);
1173 if (r < 0)
1174 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1175
7465dd22
PF		 1176 r = sd_radv_start(link->radv);
1177 if (r < 0 && r != -EBUSY)
1178 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1179 }
1180
838d39af
SS		 1181 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1182 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1183 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1184 assert(link->dhcp6_client);
1185 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1186
838d39af 1187 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1188 if (r < 0 && r != -EBUSY)
1633c457 1189 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1190 else
1191 log_link_debug(link, "Acquiring DHCPv6 lease");
1192 }
1193
1633c457
YW		 1194 r = dhcp6_request_prefix_delegation(link);
1195 if (r < 0)
1196 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1197
e7ab854c
TG		 1198 return 0;
1199}
1200
6fc25497 1201static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1202 int r;
1203
1204 assert(link);
ff254138
TG		 1205 assert(link->manager);
1206 assert(link->manager->event);
1207
0107b769
ZJS		 1208 if (link->dhcp_client) {
1209 log_link_debug(link, "Acquiring DHCPv4 lease");
1210
1211 r = sd_dhcp_client_start(link->dhcp_client);
1212 if (r < 0)
1213 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1214
0b4b66cc 1215 } else if (link->ipv4ll) {
6a7a4e4d 1216 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1217
1218 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1219 if (r < 0)
1220 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1221 }
1222
6fc25497
SS		 1223 return 0;
1224}
1225
1226static int link_acquire_conf(Link *link) {
1227 int r;
1228
1229 assert(link);
1230
1231 r = link_acquire_ipv4_conf(link);
1232 if (r < 0)
1233 return r;
1234
3f7cc080 1235 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1236 r = link_acquire_ipv6_conf(link);
1237 if (r < 0)
1238 return r;
1239 }
1240
2ffd6d73
YW		 1241 r = link_lldp_emit_start(link);
1242 if (r < 0)
1243 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1244
ff254138
TG		 1245 return 0;
1246}
1247
a61bb41c 1248bool link_has_carrier(Link *link) {
deb2e523
TG		 1249 /* see Documentation/networking/operstates.txt in the kernel sources */
1250
a61bb41c 1251 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1252 return true;
1253
a61bb41c 1254 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1255 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1256 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1257 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1258 return true;
1259
1260 return false;
1261}
1262
0e2fdb83
SS		 1263static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1264 int r;
1265
1266 assert(link);
1267
9524014e
DS		 1268 link->setting_genmode = false;
1269
0e2fdb83
SS		 1270 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1271 return 1;
1272
1273 r = sd_netlink_message_get_errno(m);
1274 if (r < 0)
5ecb131d 1275 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1276 else
1277 log_link_debug(link, "Setting address genmode done.");
1278
1279 if (link->state == LINK_STATE_INITIALIZED) {
1280 r = link_configure_continue(link);
1281 if (r < 0)
1282 link_enter_failed(link);
1283 }
0e2fdb83
SS		 1284
1285 return 1;
1286}
1287
1288static int link_configure_addrgen_mode(Link *link) {
1289 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1290 uint8_t ipv6ll_mode;
1291 int r;
1292
1293 assert(link);
1294 assert(link->network);
1295 assert(link->manager);
1296 assert(link->manager->rtnl);
1297
9524014e 1298 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1299 return 0;
1300
0e2fdb83
SS		 1301 log_link_debug(link, "Setting address genmode for link");
1302
1303 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1304 if (r < 0)
1305 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1306
1307 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1308 if (r < 0)
1309 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1310
1311 r = sd_netlink_message_open_container(req, AF_INET6);
1312 if (r < 0)
1313 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1314
1315 if (!link_ipv6ll_enabled(link))
1316 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1317 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1318 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1319 if (r < 0) {
1320 /* The file may not exist. And even if it exists, when stable_secret is unset,
1321 * reading the file fails with EIO. */
1322 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1323
1324 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1325 } else
1326 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1327 } else
6f6296b9 1328 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1329
1330 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1333
1334 r = sd_netlink_message_close_container(req);
1335 if (r < 0)
1336 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1337
1338 r = sd_netlink_message_close_container(req);
1339 if (r < 0)
1340 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1341
1342 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1343 link_netlink_destroy_callback, link);
1344 if (r < 0)
1345 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1346
1347 link_ref(link);
9524014e 1348 link->setting_genmode = true;
0e2fdb83
SS		 1349
1350 return 0;
1351}
1352
302a796f 1353static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1354 int r;
1355
1746cf2a
TG		 1356 assert(link);
1357
5da8149f 1358 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1359 return 1;
1360
1c4baffc 1361 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1362 if (r < 0)
26d6b214 1363 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1364 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1365
f882c247
TG		 1366 return 1;
1367}
1368
1cc84f3b 1369static int link_up(Link *link) {
4afd3348 1370 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1371 int r;
1372
f882c247 1373 assert(link);
c106cc36 1374 assert(link->network);
f882c247
TG		 1375 assert(link->manager);
1376 assert(link->manager->rtnl);
1377
6a7a4e4d 1378 log_link_debug(link, "Bringing link up");
449f7554 1379
6a7a4e4d
LP		 1380 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1383
5d4795f3 1384 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1387
302a796f
YW		 1388 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1389 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1390 if (r < 0)
1391 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1392
b226d99b
TG		 1393 link_ref(link);
1394
f882c247
TG		 1395 return 0;
1396}
1397
302a796f 1398static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1399 int r;
1400
1401 assert(link);
1402
1403 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1404 return 1;
1405
1c4baffc 1406 r = sd_netlink_message_get_errno(m);
0d4ad91d 1407 if (r < 0)
5ecb131d 1408 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1409
1410 return 1;
1411}
1412
8e54db83 1413int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1414 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1415 int r;
1416
1417 assert(link);
1418 assert(link->manager);
1419 assert(link->manager->rtnl);
1420
6a7a4e4d 1421 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1422
1423 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1424 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1427
1428 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1431
8e54db83
YW		 1432 r = netlink_call_async(link->manager->rtnl, NULL, req,
1433 callback ?: link_down_handler,
302a796f 1434 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1437
1438 link_ref(link);
1439
1440 return 0;
1441}
1442
89fe6535
SS		 1443static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1444 int r;
1445
1446 assert(link);
1447
1448 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1449 return 1;
1450
1451 r = sd_netlink_message_get_errno(m);
1452 if (r < 0)
1453 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1454
1455 return 1;
1456}
1457
1458static int link_set_group(Link *link) {
1459 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1460 int r;
1461
1462 assert(link);
1463 assert(link->network);
1464 assert(link->manager);
1465 assert(link->manager->rtnl);
1466
1467 if (link->network->group <= 0)
1468 return 0;
1469
1470 log_link_debug(link, "Setting group");
1471
1472 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1475
1476 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not set link group: %m");
1479
1480 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1481 link_netlink_destroy_callback, link);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1484
1485 link_ref(link);
1486
1487 return 0;
1488}
1489
0d4ad91d
AR		 1490static int link_handle_bound_to_list(Link *link) {
1491 Link *l;
0d4ad91d
AR		 1492 int r;
1493 bool required_up = false;
1494 bool link_is_up = false;
1495
1496 assert(link);
1497
1498 if (hashmap_isempty(link->bound_to_links))
1499 return 0;
1500
1501 if (link->flags & IFF_UP)
1502 link_is_up = true;
1503
90e74a66 1504 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1505 if (link_has_carrier(l)) {
1506 required_up = true;
1507 break;
1508 }
1509
1510 if (!required_up && link_is_up) {
8e54db83 1511 r = link_down(link, NULL);
0d4ad91d
AR		 1512 if (r < 0)
1513 return r;
1514 } else if (required_up && !link_is_up) {
1515 r = link_up(link);
1516 if (r < 0)
1517 return r;
1518 }
1519
1520 return 0;
1521}
1522
1523static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1524 Link *l;
1525 int r;
1526
1527 assert(link);
1528
1529 if (hashmap_isempty(link->bound_by_links))
1530 return 0;
1531
90e74a66 1532 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1533 r = link_handle_bound_to_list(l);
1534 if (r < 0)
1535 return r;
1536 }
1537
1538 return 0;
1539}
1540
1541static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1542 int r;
1543
1544 assert(link);
1545 assert(carrier);
1546
1547 if (link == carrier)
1548 return 0;
1549
1550 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1551 return 0;
1552
1553 r = hashmap_ensure_allocated(h, NULL);
1554 if (r < 0)
1555 return r;
1556
1557 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1558 if (r < 0)
1559 return r;
1560
1561 return 0;
1562}
1563
1564static int link_new_bound_by_list(Link *link) {
1565 Manager *m;
1566 Link *carrier;
0d4ad91d
AR		 1567 int r;
1568 bool list_updated = false;
1569
1570 assert(link);
1571 assert(link->manager);
1572
1573 m = link->manager;
1574
90e74a66 1575 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1576 if (!carrier->network)
1577 continue;
1578
1579 if (strv_isempty(carrier->network->bind_carrier))
1580 continue;
1581
191a3f16 1582 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1583 r = link_put_carrier(link, carrier, &link->bound_by_links);
1584 if (r < 0)
1585 return r;
1586
1587 list_updated = true;
1588 }
1589 }
1590
1591 if (list_updated)
84de38c5 1592 link_dirty(link);
0d4ad91d 1593
90e74a66 1594 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1595 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1596 if (r < 0)
1597 return r;
1598
84de38c5 1599 link_dirty(carrier);
0d4ad91d
AR		 1600 }
1601
1602 return 0;
1603}
1604
1605static int link_new_bound_to_list(Link *link) {
1606 Manager *m;
1607 Link *carrier;
0d4ad91d
AR		 1608 int r;
1609 bool list_updated = false;
1610
1611 assert(link);
1612 assert(link->manager);
1613
1614 if (!link->network)
1615 return 0;
1616
1617 if (strv_isempty(link->network->bind_carrier))
1618 return 0;
1619
1620 m = link->manager;
1621
90e74a66 1622 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1623 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1624 r = link_put_carrier(link, carrier, &link->bound_to_links);
1625 if (r < 0)
1626 return r;
1627
1628 list_updated = true;
1629 }
1630 }
1631
1632 if (list_updated)
84de38c5 1633 link_dirty(link);
0d4ad91d 1634
90e74a66 1635 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1636 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1637 if (r < 0)
1638 return r;
1639
84de38c5 1640 link_dirty(carrier);
0d4ad91d
AR		 1641 }
1642
1643 return 0;
1644}
1645
1646static int link_new_carrier_maps(Link *link) {
1647 int r;
1648
1649 r = link_new_bound_by_list(link);
1650 if (r < 0)
1651 return r;
1652
1653 r = link_handle_bound_by_list(link);
1654 if (r < 0)
1655 return r;
1656
1657 r = link_new_bound_to_list(link);
1658 if (r < 0)
1659 return r;
1660
1661 r = link_handle_bound_to_list(link);
1662 if (r < 0)
1663 return r;
1664
1665 return 0;
1666}
1667
1668static void link_free_bound_to_list(Link *link) {
1669 Link *bound_to;
0d4ad91d 1670
90e74a66 1671 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1672 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1673
1674 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1675 link_dirty(bound_to);
0d4ad91d
AR		 1676 }
1677
1678 return;
1679}
1680
1681static void link_free_bound_by_list(Link *link) {
1682 Link *bound_by;
0d4ad91d 1683
90e74a66 1684 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1685 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1686
1687 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1688 link_dirty(bound_by);
0d4ad91d
AR		 1689 link_handle_bound_to_list(bound_by);
1690 }
1691 }
1692
1693 return;
1694}
1695
1696static void link_free_carrier_maps(Link *link) {
1697 bool list_updated = false;
1698
1699 assert(link);
1700
1701 if (!hashmap_isempty(link->bound_to_links)) {
1702 link_free_bound_to_list(link);
1703 list_updated = true;
1704 }
1705
1706 if (!hashmap_isempty(link->bound_by_links)) {
1707 link_free_bound_by_list(link);
1708 list_updated = true;
1709 }
1710
1711 if (list_updated)
84de38c5 1712 link_dirty(link);
0d4ad91d
AR		 1713
1714 return;
1715}
1716
5f707e12
YW		 1717static int link_append_to_master(Link *link, NetDev *netdev) {
1718 Link *master;
1719 int r;
1720
1721 assert(link);
1722 assert(netdev);
1723
1724 r = link_get(link->manager, netdev->ifindex, &master);
1725 if (r < 0)
1726 return r;
1727
de7fef4b 1728 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1729 if (r <= 0)
5f707e12
YW		 1730 return r;
1731
1732 link_ref(link);
1733 return 0;
1734}
1735
1736static void link_drop_from_master(Link *link, NetDev *netdev) {
1737 Link *master;
1738
1739 assert(link);
1740
1741 if (!link->manager || !netdev)
1742 return;
1743
1744 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1745 return;
1746
1747 link_unref(set_remove(master->slaves, link));
1748}
1749
1750static void link_detach_from_manager(Link *link) {
1751 if (!link || !link->manager)
1752 return;
1753
1754 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1755 link_clean(link);
1756
1757 /* The following must be called at last. */
1758 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1759 link_unref(link);
1760}
1761
0d4ad91d
AR		 1762void link_drop(Link *link) {
1763 if (!link || link->state == LINK_STATE_LINGER)
1764 return;
1765
1766 link_set_state(link, LINK_STATE_LINGER);
1767
1768 link_free_carrier_maps(link);
1769
5f707e12
YW		 1770 if (link->network) {
1771 link_drop_from_master(link, link->network->bridge);
1772 link_drop_from_master(link, link->network->bond);
1773 }
1774
6a7a4e4d 1775 log_link_debug(link, "Link removed");
0d4ad91d 1776
db2f8a2e 1777 (void) unlink(link->state_file);
c4397d94 1778 link_detach_from_manager(link);
0d4ad91d
AR		 1779}
1780
3f265037 1781static int link_joined(Link *link) {
f882c247
TG		 1782 int r;
1783
ef1ba606 1784 assert(link);
f5be5601 1785 assert(link->network);
dd3efc09 1786
0d4ad91d
AR		 1787 if (!hashmap_isempty(link->bound_to_links)) {
1788 r = link_handle_bound_to_list(link);
1789 if (r < 0)
1790 return r;
1791 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1792 r = link_up(link);
1793 if (r < 0) {
1794 link_enter_failed(link);
1795 return r;
1796 }
ef1ba606 1797 }
f882c247 1798
9ed794a3 1799 if (link->network->bridge) {
e1853b00 1800 r = link_set_bridge(link);
6a7a4e4d
LP		 1801 if (r < 0)
1802 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1803
1804 r = link_append_to_master(link, link->network->bridge);
1805 if (r < 0)
1806 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1807 }
1808
eb64b435 1809 if (link->network->bond) {
7fcee284 1810 r = link_set_bond(link);
eb64b435
SS		 1811 if (r < 0)
1812 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1813
45e11abf 1814 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1815 if (r < 0)
1816 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1817 }
1818
34d7f2c9
YW		 1819 r = link_set_bridge_vlan(link);
1820 if (r < 0)
1821 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1822
c1835a42
RM		 1823 /* Skip setting up addresses until it gets carrier,
1824 or it would try to set addresses twice,
1825 which is bad for non-idempotent steps. */
dad2d78e 1826 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1827 return 0;
1828
b425c3ae 1829 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1830
1831 r = link_acquire_conf(link);
1832 if (r < 0)
1833 return r;
1834
682c65b0 1835 return link_set_static_configs(link);
02b59d57
TG		 1836}
1837
302a796f 1838static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1839 int r;
1840
1746cf2a 1841 assert(link);
ef1ba606 1842 assert(link->network);
34bf3c00 1843 assert(link->enslaving > 0);
02b59d57 1844
313cefa1 1845 link->enslaving--;
52433f6b 1846
5da8149f 1847 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1848 return 1;
1849
1c4baffc 1850 r = sd_netlink_message_get_errno(m);
856f962c 1851 if (r < 0 && r != -EEXIST) {
5ecb131d 1852 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1853 link_enter_failed(link);
1854 return 1;
4ff296b0
YW		 1855 }
1856
1857 log_link_debug(link, "Joined netdev");
02b59d57 1858
34bf3c00 1859 if (link->enslaving == 0) {
4ff296b0
YW		 1860 r = link_joined(link);
1861 if (r < 0)
1862 link_enter_failed(link);
34bf3c00 1863 }
02b59d57
TG		 1864
1865 return 1;
1866}
1867
3f265037 1868static int link_enter_join_netdev(Link *link) {
6a0a2f86 1869 NetDev *netdev;
02b59d57
TG		 1870 int r;
1871
1872 assert(link);
1873 assert(link->network);
bd08ce56 1874 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1875
289e6774 1876 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1877
84de38c5 1878 link_dirty(link);
34bf3c00 1879 link->enslaving = 0;
02b59d57 1880
d9c67ea1 1881 if (link->network->bond) {
cbff7170
TJ		 1882 if (link->network->bond->state == NETDEV_STATE_READY &&
1883 link->network->bond->ifindex == link->master_ifindex)
1884 return link_joined(link);
1885
f2341e0a
LP		 1886 log_struct(LOG_DEBUG,
1887 LOG_LINK_INTERFACE(link),
1888 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1889 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1890
34bf3c00
YW		 1891 link->enslaving++;
1892
f2341e0a 1893 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1894 if (r < 0) {
f2341e0a
LP		 1895 log_struct_errno(LOG_WARNING, r,
1896 LOG_LINK_INTERFACE(link),
1897 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1898 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1899 link_enter_failed(link);
1900 return r;
1901 }
0ad6148e
MO		 1902 }
1903
d9c67ea1 1904 if (link->network->bridge) {
f2341e0a
LP		 1905 log_struct(LOG_DEBUG,
1906 LOG_LINK_INTERFACE(link),
1907 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1908 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1909
34bf3c00
YW		 1910 link->enslaving++;
1911
f2341e0a 1912 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1913 if (r < 0) {
f2341e0a
LP		 1914 log_struct_errno(LOG_WARNING, r,
1915 LOG_LINK_INTERFACE(link),
1916 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1917 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1918 link_enter_failed(link);
1919 return r;
1920 }
52433f6b
TG		 1921 }
1922
6cb955c6
AR		 1923 if (link->network->vrf) {
1924 log_struct(LOG_DEBUG,
1925 LOG_LINK_INTERFACE(link),
1926 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1927 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1928
34bf3c00
YW		 1929 link->enslaving++;
1930
6cb955c6
AR		 1931 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1932 if (r < 0) {
1933 log_struct_errno(LOG_WARNING, r,
1934 LOG_LINK_INTERFACE(link),
1935 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1936 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1937 link_enter_failed(link);
1938 return r;
1939 }
6cb955c6
AR		 1940 }
1941
90e74a66 1942 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1943
2b6db913
YW		 1944 if (netdev->ifindex > 0)
1945 /* Assume already enslaved. */
a63e5daa 1946 continue;
a63e5daa 1947
7033af49
YW		 1948 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1949 continue;
1950
f2341e0a
LP		 1951 log_struct(LOG_DEBUG,
1952 LOG_LINK_INTERFACE(link),
1953 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1954 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1955
34bf3c00
YW		 1956 link->enslaving++;
1957
f2341e0a 1958 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1959 if (r < 0) {
f2341e0a
LP		 1960 log_struct_errno(LOG_WARNING, r,
1961 LOG_LINK_INTERFACE(link),
1962 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1963 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1964 link_enter_failed(link);
1965 return r;
1966 }
326cb406
SS		 1967 }
1968
34bf3c00
YW		 1969 if (link->enslaving == 0)
1970 return link_joined(link);
1971
ef1ba606
TG		 1972 return 0;
1973}
1974
5e5b137a 1975static int link_drop_foreign_config(Link *link) {
5e5b137a
TG		 1976 int r;
1977
f8f2f880
YW		 1978 r = link_drop_foreign_addresses(link);
1979 if (r < 0)
1980 return r;
5e5b137a 1981
59048336
YW		 1982 r = link_drop_foreign_neighbors(link);
1983 if (r < 0)
1984 return r;
d1bdafd2 1985
779804dd 1986 return link_drop_foreign_routes(link);
5e5b137a
TG		 1987}
1988
3104883d 1989static int link_drop_config(Link *link) {
3104883d
SS		 1990 int r;
1991
d7fbb9f5
YW		 1992 r = link_drop_addresses(link);
1993 if (r < 0)
1994 return r;
3104883d 1995
59048336
YW		 1996 r = link_drop_neighbors(link);
1997 if (r < 0)
1998 return r;
d1bdafd2 1999
62f0ea5f
YW		 2000 r = link_drop_routes(link);
2001 if (r < 0)
2002 return r;
3104883d 2003
c69305ff
LP		 2004 ndisc_flush(link);
2005
3104883d
SS		 2006 return 0;
2007}
2008
256c75fd 2009int link_configure(Link *link) {
4ecdcb07
YW		 2010 int r;
2011
ef1ba606 2012 assert(link);
b22d8a00 2013 assert(link->network);
bd08ce56 2014 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2015
34658df2 2016 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2017 if (r < 0)
2018 return r;
2019
518cd6b5
SS		 2020 r = link_configure_sr_iov(link);
2021 if (r < 0)
2022 return r;
2023
500b96eb 2024 if (link->iftype == ARPHRD_CAN)
93ea7750 2025 return link_configure_can(link);
92c918b0 2026
5e0534f1 2027 r = link_set_sysctl(link);
b69c3180
SS		 2028 if (r < 0)
2029 return r;
8749cbcd 2030
5e0534f1 2031 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 2032 if (r < 0)
2033 return r;
2034
e16e4b3b
DS		 2035 r = link_set_mac(link);
2036 if (r < 0)
2037 return r;
2038
2039 r = link_set_nomaster(link);
2040 if (r < 0)
2041 return r;
2042
99d2baa2
SS		 2043 r = link_set_flags(link);
2044 if (r < 0)
2045 return r;
2046
89fe6535
SS		 2047 r = link_set_group(link);
2048 if (r < 0)
2049 return r;
2050
2ffd6d73
YW		 2051 r = ipv4ll_configure(link);
2052 if (r < 0)
2053 return r;
64b21ece 2054
2ffd6d73
YW		 2055 r = dhcp4_configure(link);
2056 if (r < 0)
2057 return r;
eb34d4af 2058
2ffd6d73
YW		 2059 r = dhcp6_configure(link);
2060 if (r < 0)
2061 return r;
f5a8c43f 2062
2ffd6d73
YW		 2063 r = ndisc_configure(link);
2064 if (r < 0)
2065 return r;
4138fb2c 2066
086b8853
YW		 2067 r = radv_configure(link);
2068 if (r < 0)
2069 return r;
7465dd22 2070
2ffd6d73
YW		 2071 r = link_lldp_rx_configure(link);
2072 if (r < 0)
2073 return r;
ce43e484 2074
f6fcc1c2 2075 r = link_configure_mtu(link);
40288ece
YW		 2076 if (r < 0)
2077 return r;
44b598a1 2078
9f6e82e6
YW		 2079 r = link_configure_addrgen_mode(link);
2080 if (r < 0)
2081 return r;
0e2fdb83 2082
3a390124
DS		 2083 return link_configure_continue(link);
2084}
2085
2086/* The configuration continues in this separate function, instead of
2087 * including this in the above link_configure() function, for two
2088 * reasons:
2089 * 1) some devices reset the link when the mtu is set, which caused
2090 * an infinite loop here in networkd; see:
2091 * https://github.com/systemd/systemd/issues/6593
2092 * https://github.com/systemd/systemd/issues/9831
2093 * 2) if ipv6ll is disabled, then bringing the interface up must be
2094 * delayed until after we get confirmation from the kernel that
2095 * the addr_gen_mode parameter has been set (via netlink), see:
2096 * https://github.com/systemd/systemd/issues/13882
2097 */
2098static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2099 int r;
2100
2101 assert(link);
2102 assert(link->network);
bd08ce56 2103 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2104
9524014e 2105 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2106 return 0;
2107
4c649652
DS		 2108 /* Drop foreign config, but ignore loopback or critical devices.
2109 * We do not want to remove loopback address or addresses used for root NFS. */
2110 if (!(link->flags & IFF_LOOPBACK) &&
2111 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2112 r = link_drop_foreign_config(link);
2113 if (r < 0)
2114 return r;
2115 }
2116
d236718c
DS		 2117 /* The kernel resets ipv6 mtu after changing device mtu;
2118 * we must set this here, after we've set device mtu */
2119 r = link_set_ipv6_mtu(link);
2120 if (r < 0)
5e0534f1 2121 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2122
3f265037 2123 return link_enter_join_netdev(link);
505f8da7
TG		 2124}
2125
572b21d9 2126static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2127 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2128 Network *network;
2129 int r;
2130
8bceafa7 2131 assert(m);
572b21d9 2132
8bceafa7
YW		 2133 r = sd_netlink_message_get_errno(m);
2134 if (r < 0)
2135 return r;
572b21d9 2136
8bceafa7
YW		 2137 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2138 if (r < 0 && r != -ENODATA)
2139 return r;
572b21d9 2140
8bceafa7 2141 strv_free_and_replace(link->alternative_names, s);
572b21d9 2142
c643bda5
YW		 2143 r = network_get(link->manager, link->iftype, link->sd_device,
2144 link->ifname, link->alternative_names, link->driver,
b8162cd2 2145 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2146 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2147 if (r == -ENOENT) {
2148 link_enter_unmanaged(link);
2149 return 0;
2150 } else if (r == 0 && network->unmanaged) {
2151 link_enter_unmanaged(link);
2152 return 0;
2153 } else if (r < 0)
2154 return r;
2155
99b8517c 2156 if (link->network == network && !force)
ad932b15
YW		 2157 return 0;
2158
2159 log_link_info(link, "Re-configuring with %s", network->filename);
2160
2161 /* Dropping old .network file */
2a99eed0 2162 r = link_stop_engines(link, false);
572b21d9 2163 if (r < 0)
ad932b15 2164 return r;
ad932b15 2165
ad932b15
YW		 2166 r = link_drop_config(link);
2167 if (r < 0)
2168 return r;
2169
2c7b826d 2170 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2171 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2172 r = link_drop_foreign_config(link);
2173 if (r < 0)
2174 return r;
2175 }
2176
2177 link_free_carrier_maps(link);
2178 link_free_engines(link);
2179 link->network = network_unref(link->network);
59c31eba 2180 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2181
2182 /* Then, apply new .network file */
2183 r = network_apply(network, link);
2184 if (r < 0)
2185 return r;
2186
2187 r = link_new_carrier_maps(link);
2188 if (r < 0)
2189 return r;
2190
2191 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2192 link_dirty(link);
ad932b15
YW		 2193
2194 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2195 * link_configure() is called later asynchronously. */
2196 r = link_configure_duid(link);
2197 if (r <= 0)
2198 return r;
2199
2200 r = link_configure(link);
2201 if (r < 0)
2202 return r;
2203
2204 return 0;
2205}
2206
572b21d9
YW		 2207static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2208 int r;
2209
2210 r = link_reconfigure_internal(link, m, false);
2211 if (r < 0)
2212 link_enter_failed(link);
2213
2214 return 1;
2215}
2216
2217static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2218 int r;
2219
2220 r = link_reconfigure_internal(link, m, true);
2221 if (r < 0)
2222 link_enter_failed(link);
2223
2224 return 1;
2225}
2226
2227int link_reconfigure(Link *link, bool force) {
2228 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2229 int r;
2230
8bceafa7 2231 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2232 * the function from being called multiple times simultaneously, refuse to reconfigure the
2233 * interface in these cases. */
8bceafa7 2234 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2235 return 0; /* 0 means no-op. */
2c0d7ed3 2236
572b21d9
YW		 2237 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2238 link->ifindex);
2239 if (r < 0)
2240 return r;
2241
2242 r = netlink_call_async(link->manager->rtnl, NULL, req,
2243 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2244 link_netlink_destroy_callback, link);
2245 if (r < 0)
2246 return r;
2247
2248 link_ref(link);
2249
8bceafa7 2250 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2251}
2252
e6bf7774 2253static int link_initialized_and_synced(Link *link) {
505f8da7 2254 Network *network;
505f8da7
TG		 2255 int r;
2256
2257 assert(link);
2258 assert(link->ifname);
2259 assert(link->manager);
2260
bd08ce56
YW		 2261 /* We may get called either from the asynchronous netlink callback,
2262 * or directly for link_add() if running in a container. See link_add(). */
2263 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2264 return 0;
505f8da7 2265
6a7a4e4d 2266 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2267 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2268
0d4ad91d
AR		 2269 r = link_new_bound_by_list(link);
2270 if (r < 0)
2271 return r;
2272
2273 r = link_handle_bound_by_list(link);
2274 if (r < 0)
2275 return r;
2276
c4a03a56 2277 if (!link->network) {
0894cfe4 2278 r = wifi_get_info(link);
8d968fdd
YW		 2279 if (r < 0)
2280 return r;
2281
c643bda5
YW		 2282 r = network_get(link->manager, link->iftype, link->sd_device,
2283 link->ifname, link->alternative_names, link->driver,
b8162cd2 2284 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2285 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2286 if (r == -ENOENT) {
2287 link_enter_unmanaged(link);
4232cf04 2288 return 0;
a09dc546
DM		 2289 } else if (r == 0 && network->unmanaged) {
2290 link_enter_unmanaged(link);
2291 return 0;
c4a03a56
TG		 2292 } else if (r < 0)
2293 return r;
505f8da7 2294
c4a03a56
TG		 2295 if (link->flags & IFF_LOOPBACK) {
2296 if (network->link_local != ADDRESS_FAMILY_NO)
2297 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2298
c4a03a56
TG		 2299 if (network->dhcp != ADDRESS_FAMILY_NO)
2300 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2301
c4a03a56
TG		 2302 if (network->dhcp_server)
2303 log_link_debug(link, "Ignoring DHCP server for loopback link");
2304 }
bd2efe92 2305
7d342c03 2306 r = network_apply(network, link);
c4a03a56
TG		 2307 if (r < 0)
2308 return r;
2309 }
505f8da7 2310
0d4ad91d
AR		 2311 r = link_new_bound_to_list(link);
2312 if (r < 0)
2313 return r;
2314
27dfc982
YW		 2315 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2316 * link_configure() is called later asynchronously. */
2317 r = link_configure_duid(link);
2318 if (r <= 0)
2319 return r;
2320
a748b692
TG		 2321 r = link_configure(link);
2322 if (r < 0)
2323 return r;
2324
4232cf04 2325 return 0;
505f8da7
TG		 2326}
2327
302a796f 2328static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2329 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2330 int r;
2331
572b21d9
YW		 2332 r = sd_netlink_message_get_errno(m);
2333 if (r < 0) {
40681e5c 2334 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2335 link_enter_failed(link);
2336 return 0;
2337 }
2338
2339 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2340 if (r < 0 && r != -ENODATA) {
2341 link_enter_failed(link);
2342 return 0;
2343 }
2344
2345 strv_free_and_replace(link->alternative_names, s);
2346
4ff296b0
YW		 2347 r = link_initialized_and_synced(link);
2348 if (r < 0)
2349 link_enter_failed(link);
e6bf7774
YW		 2350 return 1;
2351}
2352
51517f9e 2353int link_initialized(Link *link, sd_device *device) {
4afd3348 2354 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2355 int r;
2356
2357 assert(link);
2358 assert(link->manager);
2359 assert(link->manager->rtnl);
2360 assert(device);
2361
8434fd5c 2362 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2363 return 0;
2364
51517f9e 2365 if (link->sd_device)
679b3605
TG		 2366 return 0;
2367
79008bdd 2368 log_link_debug(link, "udev initialized link");
bd08ce56 2369 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2370
51517f9e 2371 link->sd_device = sd_device_ref(device);
4f561e8e 2372
3c9b8860
TG		 2373 /* udev has initialized the link, but we don't know if we have yet
2374 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2375 * when it returns we know that the pending NEWLINKs have already been
2376 * processed and that we are up-to-date */
4f561e8e 2377
3c9b8860
TG		 2378 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2379 link->ifindex);
4f561e8e
TG		 2380 if (r < 0)
2381 return r;
2382
302a796f
YW		 2383 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2384 link_netlink_destroy_callback, link);
4f561e8e
TG		 2385 if (r < 0)
2386 return r;
2387
5da8149f
TG		 2388 link_ref(link);
2389
4f561e8e
TG		 2390 return 0;
2391}
2392
1c4baffc 2393int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2394 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2395 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2396 Link *link;
5a937ea2 2397 int r;
505f8da7
TG		 2398
2399 assert(m);
fbbeb65a 2400 assert(m->rtnl);
505f8da7
TG		 2401 assert(message);
2402 assert(ret);
2403
2404 r = link_new(m, message, ret);
2405 if (r < 0)
2406 return r;
2407
2408 link = *ret;
2409
6a7a4e4d 2410 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2411
bf331d87
YW		 2412 if (path_is_read_only_fs("/sys") <= 0) {
2413 /* udev should be around */
ae06ab10 2414 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2415 r = sd_device_new_from_device_id(&device, ifindex_str);
2416 if (r < 0) {
4d59e14f
YW		 2417 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2418 return 0;
5c416fc4 2419 }
505f8da7 2420
5a937ea2 2421 r = sd_device_get_is_initialized(device);
51517f9e 2422 if (r < 0) {
bf331d87 2423 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2424 goto failed;
2425 }
5a937ea2 2426 if (r == 0) {
505f8da7 2427 /* not yet ready */
79008bdd 2428 log_link_debug(link, "link pending udev initialization...");
505f8da7 2429 return 0;
3c4cb064 2430 }
505f8da7 2431
299ad32d
YW		 2432 r = device_is_renaming(device);
2433 if (r < 0) {
bf331d87 2434 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2435 goto failed;
2436 }
2437 if (r > 0) {
bf331d87 2438 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2439 return 0;
2440 }
2441
4f561e8e
TG		 2442 r = link_initialized(link, device);
2443 if (r < 0)
5c416fc4 2444 goto failed;
4f561e8e 2445 } else {
e6bf7774 2446 r = link_initialized_and_synced(link);
4f561e8e 2447 if (r < 0)
5c416fc4 2448 goto failed;
4f561e8e 2449 }
505f8da7 2450
a748b692 2451 return 0;
5c416fc4
TG		 2452failed:
2453 link_enter_failed(link);
2454 return r;
a748b692
TG		 2455}
2456
c601ebf7 2457int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2458 int r;
2459
2460 assert(link);
2461
2462 log_link_info(link, "Gained IPv6LL");
2463
c601ebf7 2464 link->ipv6ll_address = *address;
e7ab854c
TG		 2465 link_check_ready(link);
2466
b9ea3d2e 2467 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2468 r = link_acquire_ipv6_conf(link);
2469 if (r < 0) {
2470 link_enter_failed(link);
2471 return r;
2472 }
2473 }
2474
2475 return 0;
2476}
2477
9c0a72f9
TG		 2478static int link_carrier_gained(Link *link) {
2479 int r;
2480
2481 assert(link);
2482
0894cfe4 2483 r = wifi_get_info(link);
8d968fdd
YW		 2484 if (r < 0)
2485 return r;
2486 if (r > 0) {
8bceafa7 2487 r = link_reconfigure(link, false);
572b21d9
YW		 2488 if (r < 0) {
2489 link_enter_failed(link);
8d968fdd 2490 return r;
572b21d9 2491 }
8d968fdd
YW		 2492 }
2493
b9ea3d2e 2494 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2495 r = link_acquire_conf(link);
2496 if (r < 0) {
2497 link_enter_failed(link);
2498 return r;
2499 }
6fc25497 2500
b425c3ae 2501 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2502 r = link_set_static_configs(link);
6fc25497
SS		 2503 if (r < 0)
2504 return r;
9c0a72f9
TG		 2505 }
2506
0d4ad91d
AR		 2507 r = link_handle_bound_by_list(link);
2508 if (r < 0)
2509 return r;
2510
1f241589
YW		 2511 if (!link->bridge_mdb_configured) {
2512 r = link_set_bridge_mdb(link);
2513 if (r < 0)
2514 return r;
2515 }
2516
2517 if (streq_ptr(link->kind, "bridge")) {
2518 Link *slave;
2519
2520 SET_FOREACH(slave, link->slaves) {
2521 if (slave->bridge_mdb_configured)
2522 continue;
2523
2524 r = link_set_bridge_mdb(slave);
2525 if (r < 0)
2526 link_enter_failed(slave);
2527 }
2528 }
3db468ea 2529
9c0a72f9
TG		 2530 return 0;
2531}
2532
2533static int link_carrier_lost(Link *link) {
2534 int r;
2535
2536 assert(link);
2537
25e992ba 2538 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2539 return 0;
2540
fbdb6605 2541 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2542 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2543 * configuration and stop the clients as well. */
97e7fb39
SS		 2544 if (link->setting_mtu)
2545 return 0;
2546
2a99eed0 2547 r = link_stop_engines(link, false);
9c0a72f9
TG		 2548 if (r < 0) {
2549 link_enter_failed(link);
2550 return r;
2551 }
2552
3104883d
SS		 2553 r = link_drop_config(link);
2554 if (r < 0)
2555 return r;
2556
2c7b826d 2557 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2558 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2559 r = link_drop_foreign_config(link);
2560 if (r < 0)
2561 return r;
2562 }
3104883d 2563
0d4ad91d
AR		 2564 r = link_handle_bound_by_list(link);
2565 if (r < 0)
2566 return r;
2567
9c0a72f9
TG		 2568 return 0;
2569}
2570
2571int link_carrier_reset(Link *link) {
2572 int r;
2573
2574 assert(link);
2575
2576 if (link_has_carrier(link)) {
2577 r = link_carrier_lost(link);
2578 if (r < 0)
2579 return r;
2580
2581 r = link_carrier_gained(link);
2582 if (r < 0)
2583 return r;
2584
6a7a4e4d 2585 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2586 }
2587
2588 return 0;
2589}
2590
d236718c
DS		 2591/* This is called every time an interface admin state changes to up;
2592 * specifically, when IFF_UP flag changes from unset to set */
2593static int link_admin_state_up(Link *link) {
2594 int r;
2595
2596 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2597 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2598 * ipv6_mtu_set prevents this from trying to set it too early before
2599 * the link->network has been setup; we only need to reset it
2600 * here if we've already set it during normal initialization. */
2601 if (link->ipv6_mtu_set) {
2602 r = link_set_ipv6_mtu(link);
2603 if (r < 0)
2604 return r;
2605 }
2606
2607 return 0;
2608}
2609
1c4baffc 2610int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2611 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2612 hw_addr_data hw_addr;
ca4e095a 2613 const char *ifname;
afe7fd56 2614 uint32_t mtu;
d236718c 2615 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2616 int old_master, r;
22936833 2617
dd3efc09 2618 assert(link);
b8941f74 2619 assert(link->ifname);
22936833
TG		 2620 assert(m);
2621
7619683b 2622 if (link->state == LINK_STATE_LINGER) {
5238e957 2623 log_link_info(link, "Link re-added");
289e6774 2624 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2625
2626 r = link_new_carrier_maps(link);
2627 if (r < 0)
2628 return r;
7619683b
TG		 2629 }
2630
1c4baffc 2631 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2632 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2633 Manager *manager = link->manager;
b8941f74 2634
30de2b89 2635 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2636
30de2b89
YW		 2637 link_drop(link);
2638 r = link_add(manager, m, &link);
2639 if (r < 0)
2640 return r;
b8941f74
TG		 2641 }
2642
572b21d9
YW		 2643 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2644 if (r >= 0)
2645 strv_free_and_replace(link->alternative_names, s);
2646
1c4baffc 2647 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2648 if (r >= 0 && mtu > 0) {
2649 link->mtu = mtu;
4e964aa0 2650 if (link->original_mtu == 0) {
afe7fd56 2651 link->original_mtu = mtu;
6a7a4e4d 2652 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2653 }
2654
2655 if (link->dhcp_client) {
3c9b8860
TG		 2656 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2657 link->mtu);
fc95c359
YW		 2658 if (r < 0)
2659 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2660 }
7465dd22
PF		 2661
2662 if (link->radv) {
2663 r = sd_radv_set_mtu(link->radv, link->mtu);
2664 if (r < 0)
2665 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2666 }
9842de0d 2667 }
69629de9 2668
e9189a1f
TG		 2669 /* The kernel may broadcast NEWLINK messages without the MAC address
2670 set, simply ignore them. */
b8162cd2
TR		 2671 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2672 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2673 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2674
b8162cd2 2675 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2676
b8162cd2 2677 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2678
a3adb4a6
YW		 2679 r = ipv4ll_update_mac(link);
2680 if (r < 0)
2681 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2682
d947f7f9
YW		 2683 r = dhcp4_update_mac(link);
2684 if (r < 0)
2685 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2686
eebba6dc
YW		 2687 r = dhcp6_update_mac(link);
2688 if (r < 0)
2689 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2690
d0c4275c 2691 r = radv_update_mac(link);
be9363cc
YW		 2692 if (r < 0)
2693 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2694
2695 if (link->ndisc) {
b8162cd2 2696 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2697 if (r < 0)
2698 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2699 }
d93d655c
YW		 2700
2701 r = ipv4_dad_update_mac(link);
2702 if (r < 0)
2703 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2704 }
2705
bb262ef0
YW		 2706 old_master = link->master_ifindex;
2707 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2708
d236718c 2709 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2710 had_carrier = link_has_carrier(link);
2711
bb262ef0 2712 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2713 if (r < 0)
2714 return r;
2715
d236718c
DS		 2716 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2717 log_link_info(link, "Link UP");
2718
2719 r = link_admin_state_up(link);
2720 if (r < 0)
2721 return r;
2722 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2723 log_link_info(link, "Link DOWN");
2724
273eec24
LP		 2725 r = link_update_lldp(link);
2726 if (r < 0)
2727 return r;
2728
a61bb41c
TG		 2729 carrier_gained = !had_carrier && link_has_carrier(link);
2730 carrier_lost = had_carrier && !link_has_carrier(link);
2731
2732 if (carrier_gained) {
6a7a4e4d 2733 log_link_info(link, "Gained carrier");
a61bb41c 2734
9c0a72f9
TG		 2735 r = link_carrier_gained(link);
2736 if (r < 0)
2737 return r;
a61bb41c 2738 } else if (carrier_lost) {
6a7a4e4d 2739 log_link_info(link, "Lost carrier");
a61bb41c 2740
9c0a72f9
TG		 2741 r = link_carrier_lost(link);
2742 if (r < 0)
a61bb41c 2743 return r;
a61bb41c
TG		 2744 }
2745
2746 return 0;
dd3efc09 2747}
fe8db0c5 2748
b295beea
LP		 2749static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2750 bool space = false;
b295beea
LP		 2751 Link *link;
2752
2753 assert(f);
2754 assert(prefix);
2755
2756 if (hashmap_isempty(h))
2757 return;
2758
0d536673 2759 fputs(prefix, f);
90e74a66 2760 HASHMAP_FOREACH(link, h) {
b295beea 2761 if (space)
0d536673 2762 fputc(' ', f);
b295beea
LP		 2763
2764 fprintf(f, "%i", link->ifindex);
2765 space = true;
2766 }
2767
0d536673 2768 fputc('\n', f);
b295beea
LP		 2769}
2770
64581765 2771static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2772 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2773 const char *str;
15761549 2774
64581765
YW		 2775 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2776 continue;
2777
e77bd3fd
YW		 2778 str = in_addr_full_to_string(dns[j]);
2779 if (!str)
15761549 2780 continue;
15761549
YW		 2781
2782 if (*space)
2783 fputc(' ', f);
e77bd3fd 2784 fputs(str, f);
15761549
YW		 2785 *space = true;
2786 }
2787}
2788
d5e172d2
ZJS		 2789static void serialize_addresses(
2790 FILE *f,
2791 const char *lvalue,
2792 bool *space,
2793 char **addresses,
2794 sd_dhcp_lease *lease,
2795 bool conditional,
ddb82ec2 2796 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2797 sd_dhcp6_lease *lease6,
2798 bool conditional6,
2799 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2800 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2801 int r;
2802
2803 bool _space = false;
2804 if (!space)
2805 space = &_space;
2806
2807 if (lvalue)
2808 fprintf(f, "%s=", lvalue);
2809 fputstrv(f, addresses, NULL, space);
2810
2811 if (lease && conditional) {
2812 const struct in_addr *lease_addresses;
2813
2814 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2815 if (r > 0)
d8bff5cc 2816 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2817 }
2818
2819 if (lease6 && conditional6 && lease6_get_addr) {
2820 const struct in6_addr *in6_addrs;
2821
2822 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2823 if (r > 0)
2824 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2825 }
2826
2827 if (lease6 && conditional6 && lease6_get_fqdn) {
2828 char **in6_hosts;
2829
2830 r = lease6_get_fqdn(lease6, &in6_hosts);
2831 if (r > 0)
2832 fputstrv(f, in6_hosts, NULL, space);
2833 }
2834
2835 if (lvalue)
2836 fputc('\n', f);
2837}
2838
fe8db0c5 2839int link_save(Link *link) {
d361b373 2840 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2841 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2842 _cleanup_fclose_ FILE *f = NULL;
2843 int r;
2844
2845 assert(link);
2846 assert(link->state_file);
68a8723c 2847 assert(link->lease_file);
bbf7c048
TG		 2848 assert(link->manager);
2849
370e9930 2850 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2851 (void) unlink(link->state_file);
370e9930
TG		 2852 return 0;
2853 }
2854
34437b4f
LP		 2855 link_lldp_save(link);
2856
deb2e523
TG		 2857 admin_state = link_state_to_string(link->state);
2858 assert(admin_state);
2859
e375dcde
TG		 2860 oper_state = link_operstate_to_string(link->operstate);
2861 assert(oper_state);
deb2e523 2862
ac999bf0
YW		 2863 carrier_state = link_carrier_state_to_string(link->carrier_state);
2864 assert(carrier_state);
2865
2866 address_state = link_address_state_to_string(link->address_state);
2867 assert(address_state);
2868
fe8db0c5
TG		 2869 r = fopen_temporary(link->state_file, &f, &temp_path);
2870 if (r < 0)
6a7a4e4d 2871 goto fail;
fe8db0c5 2872
5512a963 2873 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2874
2875 fprintf(f,
2876 "# This is private data. Do not parse.\n"
deb2e523 2877 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2878 "OPER_STATE=%s\n"
2879 "CARRIER_STATE=%s\n"
2880 "ADDRESS_STATE=%s\n",
2881 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2882
bcb7a07e 2883 if (link->network) {
fe0e16db
YW		 2884 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2885 const char *dhcp_domainname = NULL, *p;
fe0e16db 2886 bool space;
07bdc70d 2887
c1a38904
MTL		 2888 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2889 yes_no(link->network->required_for_online));
2890
d5e172d2
ZJS		 2891 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2892 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2893 strempty(link_operstate_to_string(st.min)),
2894 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2895 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2896
adc5b2e2
TG		 2897 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2898
d5e172d2
ZJS		 2899 /************************************************************/
2900
0d536673 2901 fputs("DNS=", f);
ea352b40 2902 space = false;
15761549 2903 if (link->n_dns != (unsigned) -1)
64581765 2904 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2905 else
64581765 2906 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2907
d5e172d2
ZJS		 2908 serialize_addresses(f, NULL, &space,
2909 NULL,
2910 link->dhcp_lease,
2911 link->network->dhcp_use_dns,
ddb82ec2 2912 SD_DHCP_LEASE_DNS,
1633c457 2913 link->dhcp6_lease,
d5e172d2
ZJS		 2914 link->network->dhcp6_use_dns,
2915 sd_dhcp6_lease_get_dns,
2916 NULL);
1e7a0e21 2917
a8c10331 2918 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2919 ndisc_vacuum(link);
2920
b296797f 2921 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2922 NDiscRDNSS *dd;
2923
90e74a66 2924 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2925 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2926 }
2927
2928 fputc('\n', f);
2929
d5e172d2
ZJS		 2930 /************************************************************/
2931
2932 serialize_addresses(f, "NTP", NULL,
2933 link->ntp ?: link->network->ntp,
2934 link->dhcp_lease,
2935 link->network->dhcp_use_ntp,
ddb82ec2 2936 SD_DHCP_LEASE_NTP,
1633c457 2937 link->dhcp6_lease,
d5e172d2
ZJS		 2938 link->network->dhcp6_use_ntp,
2939 sd_dhcp6_lease_get_ntp_addrs,
2940 sd_dhcp6_lease_get_ntp_fqdn);
2941
2942 serialize_addresses(f, "SIP", NULL,
2a71d57f 2943 NULL,
d5e172d2
ZJS		 2944 link->dhcp_lease,
2945 link->network->dhcp_use_sip,
ddb82ec2 2946 SD_DHCP_LEASE_SIP,
2a71d57f 2947 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2948
2949 /************************************************************/
bd8f6538 2950
b2a81c0b 2951 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2952 if (link->dhcp_lease) {
b2a81c0b 2953 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2954 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2955 }
1633c457
YW		 2956 if (link->dhcp6_lease)
2957 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2958 }
2959
fe0e16db
YW		 2960 fputs("DOMAINS=", f);
2961 space = false;
90e74a66 2962 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2963 fputs_with_space(f, p, NULL, &space);
07bdc70d 2964
1e7a0e21 2965 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 2966 if (dhcp_domainname)
2967 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2968 if (dhcp_domains)
2969 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2970 if (dhcp6_domains)
2971 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2972 }
2973
2974 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
2975 NDiscDNSSL *dd;
1e7a0e21 2976
90e74a66 2977 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 2978 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
2979 }
b2a81c0b 2980
0d536673 2981 fputc('\n', f);
6192b846 2982
d5e172d2
ZJS		 2983 /************************************************************/
2984
fe0e16db
YW		 2985 fputs("ROUTE_DOMAINS=", f);
2986 space = false;
90e74a66 2987 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 2988 fputs_with_space(f, p, NULL, &space);
b2a81c0b 2989
1e7a0e21 2990 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 2991 if (dhcp_domainname)
2992 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 2993 if (dhcp_domains)
2994 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 2995 if (dhcp6_domains)
2996 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 2997 }
2998
2999 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3000 NDiscDNSSL *dd;
1e7a0e21 3001
90e74a66 3002 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3003 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3004 }
b2a81c0b 3005
0d536673 3006 fputc('\n', f);
67272d15 3007
d5e172d2
ZJS		 3008 /************************************************************/
3009
3c9b8860 3010 fprintf(f, "LLMNR=%s\n",
15761549 3011 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3012
3013 /************************************************************/
3014
aaa297d4 3015 fprintf(f, "MDNS=%s\n",
15761549 3016 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3017
d5e172d2
ZJS		 3018 /************************************************************/
3019
3020 int dns_default_route =
3021 link->dns_default_route >= 0 ? link->dns_default_route :
3022 link->network->dns_default_route;
3023 if (dns_default_route >= 0)
3024 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3025
3026 /************************************************************/
3027
3028 DnsOverTlsMode dns_over_tls_mode =
3029 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3030 link->network->dns_over_tls_mode;
3031 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3032 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3033
3034 /************************************************************/
3035
3036 DnssecMode dnssec_mode =
3037 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3038 link->network->dnssec_mode;
3039 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3040 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3041
3042 /************************************************************/
3043
3044 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3045 if (set_isempty(nta_anchors))
3046 nta_anchors = link->network->dnssec_negative_trust_anchors;
3047
3048 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3049 const char *n;
3050
0d536673 3051 fputs("DNSSEC_NTA=", f);
8a516214 3052 space = false;
90e74a66 3053 SET_FOREACH(n, nta_anchors)
d390f8ef 3054 fputs_with_space(f, n, NULL, &space);
0d536673 3055 fputc('\n', f);
8a516214 3056 }
bcb7a07e 3057 }
7374f9d8 3058
b295beea
LP		 3059 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3060 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3061
8eb9058d 3062 if (link->dhcp_lease) {
bd91b83e 3063 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3064 if (r < 0)
c2d6bd61 3065 goto fail;
fe8db0c5 3066
7374f9d8 3067 fprintf(f,
b0e39c82
TG		 3068 "DHCP_LEASE=%s\n",
3069 link->lease_file);
deb2e523 3070 } else
6990fb6b 3071 (void) unlink(link->lease_file);
fe8db0c5 3072
5460bde5
YW		 3073 r = link_serialize_dhcp6_client(link, f);
3074 if (r < 0)
3075 goto fail;
18d8a2cf 3076
c2d6bd61
LP		 3077 r = fflush_and_check(f);
3078 if (r < 0)
3079 goto fail;
fe8db0c5 3080
c2d6bd61 3081 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3082 r = -errno;
c2d6bd61 3083 goto fail;
fe8db0c5
TG		 3084 }
3085
c2d6bd61 3086 return 0;
dacd6cee 3087
c2d6bd61 3088fail:
6a7a4e4d 3089 (void) unlink(link->state_file);
6a7a4e4d
LP		 3090 if (temp_path)
3091 (void) unlink(temp_path);
3092
dacd6cee 3093 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3094}
3095
84de38c5
TG		 3096/* The serialized state in /run is no longer up-to-date. */
3097void link_dirty(Link *link) {
3098 int r;
3099
3100 assert(link);
3101
0c241a37
SS		 3102 /* mark manager dirty as link is dirty */
3103 manager_dirty(link->manager);
3104
de7fef4b 3105 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3106 if (r <= 0)
de7fef4b 3107 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3108 return;
84de38c5
TG		 3109 link_ref(link);
3110}
3111
3112/* The serialized state in /run is up-to-date */
3113void link_clean(Link *link) {
3114 assert(link);
3115 assert(link->manager);
3116
1046bf9b 3117 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3118}
3119
c2a65950
YW		 3120int link_save_and_clean(Link *link) {
3121 int r;
3122
3123 r = link_save(link);
3124 if (r < 0)
3125 return r;
3126
3127 link_clean(link);
3128 return 0;
3129}
3130
fe8db0c5 3131static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3132 [LINK_STATE_PENDING] = "pending",
bd08ce56 3133 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3134 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3135 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3136 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3137 [LINK_STATE_FAILED] = "failed",
370e9930 3138 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3139};
3140
3141DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3142
3143int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3144 const char *err_msg = NULL;
3145
3146 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3147 return log_link_full_errno(link, level, err,
3148 "%s: %s%s%s%m",
3149 msg,
3150 strempty(err_msg),
3151 err_msg && !endswith(err_msg, ".") ? "." : "",
3152 err_msg ? " " : "");
5ecb131d 3153}
Unnamed repository; edit this file 'description' to name the repository.