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network: assign values after all checks are passed
[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"
af664001 19#include "fs-util.h"
737f1405 20#include "ipvlan.h"
ef118d00 21#include "missing_network.h"
cf1d700d 22#include "netlink-util.h"
c6f7c917 23#include "network-internal.h"
fb486c90 24#include "networkd-address-label.h"
093e3533 25#include "networkd-address.h"
3ddcbeea 26#include "networkd-can.h"
8fcf1d61 27#include "networkd-dhcp-server.h"
ca5ad760
YW		 28#include "networkd-dhcp4.h"
29#include "networkd-dhcp6.h"
ee446d57 30#include "networkd-fdb.h"
ca5ad760 31#include "networkd-ipv4ll.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
967d72ed 452 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 453 if (r < 0)
454 return r;
455
bb262ef0 456 r = link_update_flags(link, message, false);
51d18171
TG		 457 if (r < 0)
458 return r;
459
1cc6c93a 460 *ret = TAKE_PTR(link);
f579559b
TG		 461
462 return 0;
463}
464
15761549
YW		 465void link_ntp_settings_clear(Link *link) {
466 link->ntp = strv_free(link->ntp);
467}
468
469void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 470 if (link->n_dns != (unsigned) -1)
471 for (unsigned i = 0; i < link->n_dns; i++)
472 in_addr_full_free(link->dns[i]);
15761549
YW		 473 link->dns = mfree(link->dns);
474 link->n_dns = (unsigned) -1;
475
476 link->search_domains = ordered_set_free_free(link->search_domains);
477 link->route_domains = ordered_set_free_free(link->route_domains);
478
479 link->dns_default_route = -1;
480 link->llmnr = _RESOLVE_SUPPORT_INVALID;
481 link->mdns = _RESOLVE_SUPPORT_INVALID;
482 link->dnssec_mode = _DNSSEC_MODE_INVALID;
483 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
484
485 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
486}
487
1a6bb31f
YW		 488static void link_free_engines(Link *link) {
489 if (!link)
490 return;
491
492 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
493 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
494 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 495 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 496
497 link->lldp = sd_lldp_unref(link->lldp);
1c494872 498 link_lldp_emit_stop(link);
1a6bb31f
YW		 499
500 ndisc_flush(link);
501
502 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
503 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 504 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 505 link->ndisc = sd_ndisc_unref(link->ndisc);
506 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 507
508 ipv4_dad_unref(link);
1a6bb31f
YW		 509}
510
8301aa0b 511static Link *link_free(Link *link) {
8301aa0b 512 assert(link);
f579559b 513
15761549
YW		 514 link_ntp_settings_clear(link);
515 link_dns_settings_clear(link);
516
8eec0b9d
YW		 517 link->routes = set_free(link->routes);
518 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 519 link->dhcp_routes = set_free(link->dhcp_routes);
520 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 521 link->dhcp6_routes = set_free(link->dhcp6_routes);
522 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
523 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
524 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 525 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 526
8eec0b9d
YW		 527 link->nexthops = set_free(link->nexthops);
528 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 529
8eec0b9d
YW		 530 link->neighbors = set_free(link->neighbors);
531 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 532
8eec0b9d
YW		 533 link->addresses = set_free(link->addresses);
534 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 535 link->pool_addresses = set_free(link->pool_addresses);
e5526518 536 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 537 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
538 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
539 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
540 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 541 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 542
1a6bb31f 543 link_free_engines(link);
68a8723c 544 free(link->lease_file);
49699bac
SS		 545 free(link->lldp_file);
546
c166a070 547 free(link->ifname);
572b21d9 548 strv_free(link->alternative_names);
ceac4078 549 free(link->kind);
8d968fdd 550 free(link->ssid);
c643bda5 551 free(link->driver);
6cad256d 552
db2f8a2e 553 (void) unlink(link->state_file);
fe8db0c5 554 free(link->state_file);
c166a070 555
51517f9e 556 sd_device_unref(link->sd_device);
b5db00e5 557
0d4ad91d 558 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 559 hashmap_free(link->bound_by_links);
560
5f707e12 561 set_free_with_destructor(link->slaves, link_unref);
033295c1 562
c9c908a6
YW		 563 network_unref(link->network);
564
8301aa0b 565 return mfree(link);
14b746f7
TG		 566}
567
8301aa0b 568DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 569
11a7f229
TG		 570int link_get(Manager *m, int ifindex, Link **ret) {
571 Link *link;
11a7f229
TG		 572
573 assert(m);
e856ed00 574 assert(ifindex > 0);
11a7f229
TG		 575 assert(ret);
576
ae06ab10 577 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 578 if (!link)
579 return -ENODEV;
580
581 *ret = link;
582
583 return 0;
584}
585
af9ba57a 586void link_set_state(Link *link, LinkState state) {
e331e246
TG		 587 assert(link);
588
589 if (link->state == state)
590 return;
591
0beb9542
YW		 592 log_link_debug(link, "State changed: %s -> %s",
593 link_state_to_string(link->state),
594 link_state_to_string(state));
595
e331e246
TG		 596 link->state = state;
597
598 link_send_changed(link, "AdministrativeState", NULL);
9092113d 599 link_dirty(link);
e331e246
TG		 600}
601
57bd6899
TG		 602static void link_enter_unmanaged(Link *link) {
603 assert(link);
604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 606}
607
2a99eed0 608int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 609 int r = 0, k;
610
611 assert(link);
612 assert(link->manager);
613 assert(link->manager->event);
614
80060352
ZJS		 615 bool keep_dhcp = may_keep_dhcp &&
616 link->network &&
617 (link->manager->restarting ||
618 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
619
84add3cd 620 if (!keep_dhcp) {
111bb8f9 621 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 622 if (k < 0)
36c7d709 623 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 624 }
625
84add3cd
YW		 626 k = sd_ipv4acd_stop(link->dhcp_acd);
627 if (k < 0)
628 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 629
2a99eed0
YW		 630 k = sd_dhcp_server_stop(link->dhcp_server);
631 if (k < 0)
632 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
633
9cc65242
YW		 634 k = sd_lldp_stop(link->lldp);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
637
84add3cd
YW		 638 k = sd_ipv4ll_stop(link->ipv4ll);
639 if (k < 0)
640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 641
490ccbd5 642 k = ipv4_dad_stop(link);
2488e4d9
YW		 643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 645
84add3cd
YW		 646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 649
2ffd6d73
YW		 650 k = dhcp6_pd_remove(link);
651 if (k < 0)
652 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 653
84add3cd
YW		 654 k = sd_ndisc_stop(link->ndisc);
655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 657
84add3cd
YW		 658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 661
7272b25e 662 link_lldp_emit_stop(link);
111bb8f9
TG		 663 return r;
664}
665
b22d8a00 666void link_enter_failed(Link *link) {
ef1ba606 667 assert(link);
f882c247 668
370e9930 669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 670 return;
671
6a7a4e4d 672 log_link_warning(link, "Failed");
449f7554 673
e331e246 674 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 675
2a99eed0 676 (void) link_stop_engines(link, false);
f882c247
TG		 677}
678
7033af49
YW		 679static int link_join_netdevs_after_configured(Link *link) {
680 NetDev *netdev;
7033af49
YW		 681 int r;
682
90e74a66 683 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 684 if (netdev->ifindex > 0)
685 /* Assume already enslaved. */
686 continue;
687
688 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
689 continue;
690
691 log_struct(LOG_DEBUG,
692 LOG_LINK_INTERFACE(link),
693 LOG_NETDEV_INTERFACE(netdev),
694 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
695
696 r = netdev_join(netdev, link, NULL);
697 if (r < 0)
698 return log_struct_errno(LOG_WARNING, r,
699 LOG_LINK_INTERFACE(link),
700 LOG_NETDEV_INTERFACE(netdev),
701 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
702 }
703
704 return 0;
705}
706
e3a7b048 707static void link_enter_configured(Link *link) {
dd43110f
TG		 708 assert(link);
709 assert(link->network);
e3a7b048 710
289e6774 711 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 712 return;
dd43110f 713
e331e246 714 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 715
7033af49 716 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 717}
718
6accfd31
DA		 719void link_check_ready(Link *link) {
720 Address *a;
6accfd31
DA		 721
722 assert(link);
723
5f58af25
YW		 724 if (link->state == LINK_STATE_CONFIGURED)
725 return;
726
d19b9939
YW		 727 if (link->state != LINK_STATE_CONFIGURING)
728 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 729
730 if (!link->network)
731 return;
732
d19b9939
YW		 733 if (!link->addresses_configured)
734 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 735
d19b9939
YW		 736 if (!link->neighbors_configured)
737 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 738
90e74a66 739 SET_FOREACH(a, link->addresses)
39373cb9
YW		 740 if (!address_is_ready(a)) {
741 _cleanup_free_ char *str = NULL;
742
743 (void) in_addr_to_string(a->family, &a->in_addr, &str);
d19b9939 744 return (void) log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
39373cb9 745 }
6aa5773b 746
d19b9939
YW		 747 if (!link->static_routes_configured)
748 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 749
d19b9939
YW		 750 if (!link->static_nexthops_configured)
751 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 752
d19b9939
YW		 753 if (!link->routing_policy_rules_configured)
754 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 755
d19b9939
YW		 756 if (!link->tc_configured)
757 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 758
d19b9939
YW		 759 if (!link->sr_iov_configured)
760 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 761
d19b9939
YW		 762 if (!link->bridge_mdb_configured)
763 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 764
463797c1 765 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 766 bool has_ndisc_address = false;
767 NDiscAddress *n;
6accfd31 768
463797c1 769 if (link_ipv6ll_enabled(link) &&
d19b9939
YW		 770 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
771 return (void) log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
6accfd31 772
90e74a66 773 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 774 if (!n->marked) {
775 has_ndisc_address = true;
776 break;
777 }
778
0d0799da 779 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 780 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 781 !link->ipv4ll_address_configured)
782 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
783 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 784
0d0799da
YW		 785 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
786 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 787 if (!link->dhcp4_configured &&
788 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
789 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 790 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 791 !link->ipv4ll_address_configured)
792 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 793 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 794
0d0799da 795 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		 796 __func__,
797 yes_no(link->dhcp4_configured),
0d0799da 798 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 799 yes_no(link->dhcp6_address_configured),
800 yes_no(link->dhcp6_route_configured),
801 yes_no(link->dhcp6_pd_address_configured),
802 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 803 yes_no(link->ndisc_addresses_configured),
804 yes_no(link->ndisc_routes_configured));
39373cb9 805 }
463797c1 806 }
6accfd31 807
5f58af25 808 link_enter_configured(link);
6accfd31
DA		 809}
810
682c65b0 811static int link_set_static_configs(Link *link) {
f882c247
TG		 812 int r;
813
814 assert(link);
815 assert(link->network);
f5be5601 816 assert(link->state != _LINK_STATE_INVALID);
f882c247 817
2428613f 818 /* Reset all *_configured flags we are configuring. */
9b966cee 819 link->request_static_addresses = false;
2428613f 820 link->addresses_configured = false;
6aa5773b 821 link->addresses_ready = false;
2428613f
YW		 822 link->neighbors_configured = false;
823 link->static_routes_configured = false;
c16c7808 824 link->static_nexthops_configured = false;
2428613f
YW		 825 link->routing_policy_rules_configured = false;
826
f6bb7ac5
TJ		 827 r = link_set_bridge_fdb(link);
828 if (r < 0)
829 return r;
830
1f241589
YW		 831 r = link_set_bridge_mdb(link);
832 if (r < 0)
833 return r;
834
58f1fe9a 835 r = link_set_neighbors(link);
f3ef324d
YW		 836 if (r < 0)
837 return r;
e4a71bf3 838
682c65b0
YW		 839 r = link_set_addresses(link);
840 if (r < 0)
841 return r;
bd6379ec 842
fe2bc17c
YW		 843 r = link_set_address_labels(link);
844 if (r < 0)
845 return r;
f882c247 846
e5526518 847 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 848 r = dhcp4_server_configure(link);
849 if (r < 0)
850 return r;
d4cdbea5 851
f882c247
TG		 852 return 0;
853}
854
3a390124 855static int link_configure_continue(Link *link);
55dc8c4a 856
e16e4b3b
DS		 857static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
858 int r;
859
860 assert(link);
861
862 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
863 return 1;
864
865 r = sd_netlink_message_get_errno(m);
866 if (r < 0)
867 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
868 else
869 log_link_debug(link, "Setting MAC address done.");
870
871 return 1;
872}
873
874static int link_set_mac(Link *link) {
875 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
876 int r;
877
878 assert(link);
879 assert(link->network);
880 assert(link->manager);
881 assert(link->manager->rtnl);
882
883 if (!link->network->mac)
884 return 0;
885
886 log_link_debug(link, "Setting MAC address");
887
888 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
889 if (r < 0)
890 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
891
892 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
893 if (r < 0)
894 return log_link_error_errno(link, r, "Could not set MAC address: %m");
895
896 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
897 link_netlink_destroy_callback, link);
898 if (r < 0)
899 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
900
901 link_ref(link);
902
903 return 0;
904}
905
906static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
907 int r;
908
909 assert(link);
910
911 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
912 return 1;
913
914 r = sd_netlink_message_get_errno(m);
915 if (r < 0)
916 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
917 else
918 log_link_debug(link, "Setting nomaster done.");
919
920 return 1;
921}
922
923static int link_set_nomaster(Link *link) {
924 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
925 int r;
926
927 assert(link);
928 assert(link->network);
929 assert(link->manager);
930 assert(link->manager->rtnl);
931
932 /* set it free if not enslaved with networkd */
933 if (link->network->bridge || link->network->bond || link->network->vrf)
934 return 0;
935
936 log_link_debug(link, "Setting nomaster");
937
938 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
939 if (r < 0)
940 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
941
942 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
943 if (r < 0)
944 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
945
946 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
947 link_netlink_destroy_callback, link);
948 if (r < 0)
949 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
950
951 link_ref(link);
952
953 return 0;
954}
955
302a796f 956static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 957 int r;
958
959 assert(m);
960 assert(link);
961 assert(link->ifname);
962
55dc8c4a
YW		 963 link->setting_mtu = false;
964
5da8149f 965 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 966 return 1;
967
1c4baffc 968 r = sd_netlink_message_get_errno(m);
4ff296b0 969 if (r < 0)
5ecb131d 970 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 971 else
972 log_link_debug(link, "Setting MTU done.");
55dc8c4a 973
4ff296b0 974 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 975 r = link_configure_continue(link);
4ff296b0
YW		 976 if (r < 0)
977 link_enter_failed(link);
978 }
4f882b2a
TG		 979
980 return 1;
981}
982
933c70a0 983int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 984 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 985 int r;
986
987 assert(link);
988 assert(link->manager);
989 assert(link->manager->rtnl);
990
40288ece
YW		 991 if (mtu == 0 || link->setting_mtu)
992 return 0;
993
933c70a0 994 if (link->mtu == mtu)
ee493106
YW		 995 return 0;
996
6a7a4e4d 997 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 998
6a7a4e4d
LP		 999 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1000 if (r < 0)
1001 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1002
44b598a1 1003 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1004 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1005 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1006
1007 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1008 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1009
72c2500b 1010 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1011 }
1012
1c4baffc 1013 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1014 if (r < 0)
1015 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1016
302a796f
YW		 1017 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1018 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1019 if (r < 0)
1020 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1021
ae941762 1022 link_ref(link);
1046bf9b 1023 link->setting_mtu = true;
b226d99b 1024
4f882b2a
TG		 1025 return 0;
1026}
1027
f6fcc1c2
YW		 1028static bool link_reduces_vlan_mtu(Link *link) {
1029 /* See netif_reduces_vlan_mtu() in kernel. */
1030 return streq_ptr(link->kind, "macsec");
1031}
1032
1033static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1034 uint32_t mtu = 0;
1035 NetDev *dev;
f6fcc1c2 1036
90e74a66 1037 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1038 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1039 /* See vlan_dev_change_mtu() in kernel. */
1040 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1041
1042 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1043 /* See macvlan_change_mtu() in kernel. */
1044 mtu = dev->mtu;
1045
1046 return mtu;
1047}
1048
1049static int link_configure_mtu(Link *link) {
1050 uint32_t mtu;
1051
1052 assert(link);
1053 assert(link->network);
1054
1055 if (link->network->mtu > 0)
1056 return link_set_mtu(link, link->network->mtu);
1057
1058 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1059 if (link->mtu >= mtu)
1060 return 0;
1061
1062 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1063 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1064 link->mtu, mtu);
1065
1066 return link_set_mtu(link, mtu);
1067}
1068
302a796f 1069static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1070 int r;
1071
1072 assert(m);
1073 assert(link);
1074 assert(link->ifname);
1075
1076 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1077 return 1;
1078
1079 r = sd_netlink_message_get_errno(m);
1080 if (r < 0)
5ecb131d 1081 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1082
1083 return 1;
1084}
1085
1086static int link_set_flags(Link *link) {
1087 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1088 unsigned ifi_change = 0;
1089 unsigned ifi_flags = 0;
1090 int r;
1091
1092 assert(link);
1093 assert(link->manager);
1094 assert(link->manager->rtnl);
1095
1096 if (link->flags & IFF_LOOPBACK)
1097 return 0;
1098
1099 if (!link->network)
1100 return 0;
1101
937e305e
SS		 1102 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1103 link->network->promiscuous < 0)
99d2baa2
SS		 1104 return 0;
1105
1106 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1107 if (r < 0)
1108 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1109
1110 if (link->network->arp >= 0) {
1111 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1112 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1113 }
1114
1115 if (link->network->multicast >= 0) {
1116 ifi_change |= IFF_MULTICAST;
1117 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1118 }
1119
866e6b7a
SS		 1120 if (link->network->allmulticast >= 0) {
1121 ifi_change |= IFF_ALLMULTI;
1122 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1123 }
1124
937e305e
SS		 1125 if (link->network->promiscuous >= 0) {
1126 ifi_change |= IFF_PROMISC;
1127 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1128 }
1129
99d2baa2
SS		 1130 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1131 if (r < 0)
1132 return log_link_error_errno(link, r, "Could not set link flags: %m");
1133
302a796f
YW		 1134 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1135 link_netlink_destroy_callback, link);
99d2baa2
SS		 1136 if (r < 0)
1137 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1138
1139 link_ref(link);
1140
1141 return 0;
1142}
1143
e7ab854c
TG		 1144static int link_acquire_ipv6_conf(Link *link) {
1145 int r;
1146
1147 assert(link);
1148
2ffd6d73 1149 if (link->ndisc) {
e7ab854c
TG		 1150 log_link_debug(link, "Discovering IPv6 routers");
1151
1e7a0e21 1152 r = sd_ndisc_start(link->ndisc);
63348d13 1153 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1154 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1155 }
1156
086b8853 1157 if (link->radv) {
7465dd22
PF		 1158 assert(link->radv);
1159 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1160
1161 log_link_debug(link, "Starting IPv6 Router Advertisements");
1162
fd3ef936
YW		 1163 r = radv_emit_dns(link);
1164 if (r < 0)
1165 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1166
7465dd22
PF		 1167 r = sd_radv_start(link->radv);
1168 if (r < 0 && r != -EBUSY)
1169 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1170 }
1171
838d39af
SS		 1172 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1173 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1174 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1175 assert(link->dhcp6_client);
1176 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1177
838d39af 1178 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1179 if (r < 0 && r != -EBUSY)
1633c457 1180 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1181 else
1182 log_link_debug(link, "Acquiring DHCPv6 lease");
1183 }
1184
1633c457
YW		 1185 r = dhcp6_request_prefix_delegation(link);
1186 if (r < 0)
1187 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1188
e7ab854c
TG		 1189 return 0;
1190}
1191
6fc25497 1192static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1193 int r;
1194
1195 assert(link);
ff254138
TG		 1196 assert(link->manager);
1197 assert(link->manager->event);
1198
0107b769
ZJS		 1199 if (link->dhcp_client) {
1200 log_link_debug(link, "Acquiring DHCPv4 lease");
1201
1202 r = sd_dhcp_client_start(link->dhcp_client);
1203 if (r < 0)
1204 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1205
0b4b66cc 1206 } else if (link->ipv4ll) {
6a7a4e4d 1207 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1208
1209 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1210 if (r < 0)
1211 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1212 }
1213
6fc25497
SS		 1214 return 0;
1215}
1216
1217static int link_acquire_conf(Link *link) {
1218 int r;
1219
1220 assert(link);
1221
1222 r = link_acquire_ipv4_conf(link);
1223 if (r < 0)
1224 return r;
1225
3f7cc080 1226 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1227 r = link_acquire_ipv6_conf(link);
1228 if (r < 0)
1229 return r;
1230 }
1231
2ffd6d73
YW		 1232 r = link_lldp_emit_start(link);
1233 if (r < 0)
1234 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1235
ff254138
TG		 1236 return 0;
1237}
1238
a61bb41c 1239bool link_has_carrier(Link *link) {
deb2e523
TG		 1240 /* see Documentation/networking/operstates.txt in the kernel sources */
1241
a61bb41c 1242 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1243 return true;
1244
a61bb41c 1245 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1246 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1247 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1248 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1249 return true;
1250
1251 return false;
1252}
1253
0e2fdb83
SS		 1254static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1255 int r;
1256
1257 assert(link);
1258
9524014e
DS		 1259 link->setting_genmode = false;
1260
0e2fdb83
SS		 1261 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1262 return 1;
1263
1264 r = sd_netlink_message_get_errno(m);
1265 if (r < 0)
5ecb131d 1266 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1267 else
1268 log_link_debug(link, "Setting address genmode done.");
1269
1270 if (link->state == LINK_STATE_INITIALIZED) {
1271 r = link_configure_continue(link);
1272 if (r < 0)
1273 link_enter_failed(link);
1274 }
0e2fdb83
SS		 1275
1276 return 1;
1277}
1278
1279static int link_configure_addrgen_mode(Link *link) {
1280 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1281 uint8_t ipv6ll_mode;
1282 int r;
1283
1284 assert(link);
1285 assert(link->network);
1286 assert(link->manager);
1287 assert(link->manager->rtnl);
1288
9524014e 1289 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1290 return 0;
1291
0e2fdb83
SS		 1292 log_link_debug(link, "Setting address genmode for link");
1293
1294 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1295 if (r < 0)
1296 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1297
1298 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1301
1302 r = sd_netlink_message_open_container(req, AF_INET6);
1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1305
1306 if (!link_ipv6ll_enabled(link))
1307 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1308 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1309 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1310 if (r < 0) {
1311 /* The file may not exist. And even if it exists, when stable_secret is unset,
1312 * reading the file fails with EIO. */
1313 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1314
1315 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1316 } else
1317 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1318 } else
6f6296b9 1319 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1320
1321 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1322 if (r < 0)
1323 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1324
1325 r = sd_netlink_message_close_container(req);
1326 if (r < 0)
1327 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1328
1329 r = sd_netlink_message_close_container(req);
1330 if (r < 0)
1331 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1332
1333 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1334 link_netlink_destroy_callback, link);
1335 if (r < 0)
1336 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1337
1338 link_ref(link);
9524014e 1339 link->setting_genmode = true;
0e2fdb83
SS		 1340
1341 return 0;
1342}
1343
302a796f 1344static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1345 int r;
1346
1746cf2a
TG		 1347 assert(link);
1348
5da8149f 1349 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1350 return 1;
1351
1c4baffc 1352 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1353 if (r < 0)
26d6b214 1354 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1355 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1356
f882c247
TG		 1357 return 1;
1358}
1359
1cc84f3b 1360static int link_up(Link *link) {
4afd3348 1361 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1362 int r;
1363
f882c247 1364 assert(link);
c106cc36 1365 assert(link->network);
f882c247
TG		 1366 assert(link->manager);
1367 assert(link->manager->rtnl);
1368
6a7a4e4d 1369 log_link_debug(link, "Bringing link up");
449f7554 1370
6a7a4e4d
LP		 1371 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1372 if (r < 0)
1373 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1374
5d4795f3 1375 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1376 if (r < 0)
1377 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1378
302a796f
YW		 1379 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1380 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1383
b226d99b
TG		 1384 link_ref(link);
1385
f882c247
TG		 1386 return 0;
1387}
1388
302a796f 1389static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1390 int r;
1391
1392 assert(link);
1393
1394 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1395 return 1;
1396
1c4baffc 1397 r = sd_netlink_message_get_errno(m);
0d4ad91d 1398 if (r < 0)
5ecb131d 1399 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1400
1401 return 1;
1402}
1403
8e54db83 1404int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1405 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1406 int r;
1407
1408 assert(link);
1409 assert(link->manager);
1410 assert(link->manager->rtnl);
1411
6a7a4e4d 1412 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1413
1414 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1415 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1416 if (r < 0)
1417 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1418
1419 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1422
8e54db83
YW		 1423 r = netlink_call_async(link->manager->rtnl, NULL, req,
1424 callback ?: link_down_handler,
302a796f 1425 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1426 if (r < 0)
1427 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1428
1429 link_ref(link);
1430
1431 return 0;
1432}
1433
89fe6535
SS		 1434static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1435 int r;
1436
1437 assert(link);
1438
1439 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1440 return 1;
1441
1442 r = sd_netlink_message_get_errno(m);
1443 if (r < 0)
1444 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1445
1446 return 1;
1447}
1448
1449static int link_set_group(Link *link) {
1450 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1451 int r;
1452
1453 assert(link);
1454 assert(link->network);
1455 assert(link->manager);
1456 assert(link->manager->rtnl);
1457
1458 if (link->network->group <= 0)
1459 return 0;
1460
1461 log_link_debug(link, "Setting group");
1462
1463 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1466
1467 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not set link group: %m");
1470
1471 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1472 link_netlink_destroy_callback, link);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1475
1476 link_ref(link);
1477
1478 return 0;
1479}
1480
0d4ad91d
AR		 1481static int link_handle_bound_to_list(Link *link) {
1482 Link *l;
0d4ad91d
AR		 1483 int r;
1484 bool required_up = false;
1485 bool link_is_up = false;
1486
1487 assert(link);
1488
1489 if (hashmap_isempty(link->bound_to_links))
1490 return 0;
1491
1492 if (link->flags & IFF_UP)
1493 link_is_up = true;
1494
90e74a66 1495 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1496 if (link_has_carrier(l)) {
1497 required_up = true;
1498 break;
1499 }
1500
1501 if (!required_up && link_is_up) {
8e54db83 1502 r = link_down(link, NULL);
0d4ad91d
AR		 1503 if (r < 0)
1504 return r;
1505 } else if (required_up && !link_is_up) {
1506 r = link_up(link);
1507 if (r < 0)
1508 return r;
1509 }
1510
1511 return 0;
1512}
1513
1514static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1515 Link *l;
1516 int r;
1517
1518 assert(link);
1519
1520 if (hashmap_isempty(link->bound_by_links))
1521 return 0;
1522
90e74a66 1523 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1524 r = link_handle_bound_to_list(l);
1525 if (r < 0)
1526 return r;
1527 }
1528
1529 return 0;
1530}
1531
1532static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1533 int r;
1534
1535 assert(link);
1536 assert(carrier);
1537
1538 if (link == carrier)
1539 return 0;
1540
1541 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1542 return 0;
1543
190b3b5c 1544 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1545 if (r < 0)
1546 return r;
1547
9092113d
YW		 1548 link_dirty(link);
1549
0d4ad91d
AR		 1550 return 0;
1551}
1552
1553static int link_new_bound_by_list(Link *link) {
1554 Manager *m;
1555 Link *carrier;
0d4ad91d 1556 int r;
0d4ad91d
AR		 1557
1558 assert(link);
1559 assert(link->manager);
1560
1561 m = link->manager;
1562
90e74a66 1563 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1564 if (!carrier->network)
1565 continue;
1566
1567 if (strv_isempty(carrier->network->bind_carrier))
1568 continue;
1569
191a3f16 1570 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1571 r = link_put_carrier(link, carrier, &link->bound_by_links);
1572 if (r < 0)
1573 return r;
0d4ad91d
AR		 1574 }
1575 }
1576
90e74a66 1577 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1578 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1579 if (r < 0)
1580 return r;
0d4ad91d
AR		 1581 }
1582
1583 return 0;
1584}
1585
1586static int link_new_bound_to_list(Link *link) {
1587 Manager *m;
1588 Link *carrier;
0d4ad91d 1589 int r;
0d4ad91d
AR		 1590
1591 assert(link);
1592 assert(link->manager);
1593
1594 if (!link->network)
1595 return 0;
1596
1597 if (strv_isempty(link->network->bind_carrier))
1598 return 0;
1599
1600 m = link->manager;
1601
90e74a66 1602 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1603 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1604 r = link_put_carrier(link, carrier, &link->bound_to_links);
1605 if (r < 0)
1606 return r;
0d4ad91d
AR		 1607 }
1608 }
1609
90e74a66 1610 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1611 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1612 if (r < 0)
1613 return r;
0d4ad91d
AR		 1614 }
1615
1616 return 0;
1617}
1618
1619static int link_new_carrier_maps(Link *link) {
1620 int r;
1621
1622 r = link_new_bound_by_list(link);
1623 if (r < 0)
1624 return r;
1625
1626 r = link_handle_bound_by_list(link);
1627 if (r < 0)
1628 return r;
1629
1630 r = link_new_bound_to_list(link);
1631 if (r < 0)
1632 return r;
1633
1634 r = link_handle_bound_to_list(link);
1635 if (r < 0)
1636 return r;
1637
1638 return 0;
1639}
1640
1641static void link_free_bound_to_list(Link *link) {
9092113d 1642 bool updated = false;
0d4ad91d 1643 Link *bound_to;
0d4ad91d 1644
9092113d
YW		 1645 assert(link);
1646
1647 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1648 updated = true;
0d4ad91d
AR		 1649
1650 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1651 link_dirty(bound_to);
0d4ad91d
AR		 1652 }
1653
9092113d
YW		 1654 if (updated)
1655 link_dirty(link);
1656
0d4ad91d
AR		 1657 return;
1658}
1659
1660static void link_free_bound_by_list(Link *link) {
9092113d 1661 bool updated = false;
0d4ad91d 1662 Link *bound_by;
0d4ad91d 1663
9092113d
YW		 1664 assert(link);
1665
1666 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1667 updated = true;
0d4ad91d
AR		 1668
1669 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1670 link_dirty(bound_by);
0d4ad91d
AR		 1671 link_handle_bound_to_list(bound_by);
1672 }
1673 }
1674
9092113d
YW		 1675 if (updated)
1676 link_dirty(link);
1677
0d4ad91d
AR		 1678 return;
1679}
1680
1681static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1682 assert(link);
1683
9092113d
YW		 1684 link_free_bound_to_list(link);
1685 link_free_bound_by_list(link);
0d4ad91d
AR		 1686
1687 return;
1688}
1689
5f707e12
YW		 1690static int link_append_to_master(Link *link, NetDev *netdev) {
1691 Link *master;
1692 int r;
1693
1694 assert(link);
1695 assert(netdev);
1696
1697 r = link_get(link->manager, netdev->ifindex, &master);
1698 if (r < 0)
1699 return r;
1700
de7fef4b 1701 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1702 if (r <= 0)
5f707e12
YW		 1703 return r;
1704
1705 link_ref(link);
1706 return 0;
1707}
1708
1709static void link_drop_from_master(Link *link, NetDev *netdev) {
1710 Link *master;
1711
1712 assert(link);
1713
1714 if (!link->manager || !netdev)
1715 return;
1716
1717 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1718 return;
1719
1720 link_unref(set_remove(master->slaves, link));
1721}
1722
1723static void link_detach_from_manager(Link *link) {
1724 if (!link || !link->manager)
1725 return;
1726
1727 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1728 link_clean(link);
1729
1730 /* The following must be called at last. */
1731 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1732 link_unref(link);
1733}
1734
0d4ad91d
AR		 1735void link_drop(Link *link) {
1736 if (!link || link->state == LINK_STATE_LINGER)
1737 return;
1738
1739 link_set_state(link, LINK_STATE_LINGER);
1740
1741 link_free_carrier_maps(link);
1742
5f707e12
YW		 1743 if (link->network) {
1744 link_drop_from_master(link, link->network->bridge);
1745 link_drop_from_master(link, link->network->bond);
1746 }
1747
6a7a4e4d 1748 log_link_debug(link, "Link removed");
0d4ad91d 1749
db2f8a2e 1750 (void) unlink(link->state_file);
c4397d94 1751 link_detach_from_manager(link);
0d4ad91d
AR		 1752}
1753
3f265037 1754static int link_joined(Link *link) {
f882c247
TG		 1755 int r;
1756
ef1ba606 1757 assert(link);
f5be5601 1758 assert(link->network);
dd3efc09 1759
61135582
DS		 1760 switch (link->network->activation_policy) {
1761 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1762 r = link_handle_bound_to_list(link);
1763 if (r < 0)
1764 return r;
61135582
DS		 1765 break;
1766 case ACTIVATION_POLICY_UP:
1767 if (link->activated)
1768 break;
1769 _fallthrough_;
1770 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7
TG		 1771 r = link_up(link);
1772 if (r < 0) {
1773 link_enter_failed(link);
1774 return r;
1775 }
61135582
DS		 1776 break;
1777 case ACTIVATION_POLICY_DOWN:
1778 if (link->activated)
1779 break;
1780 _fallthrough_;
1781 case ACTIVATION_POLICY_ALWAYS_DOWN:
1782 r = link_down(link, NULL);
1783 if (r < 0) {
1784 link_enter_failed(link);
1785 return r;
1786 }
1787 break;
1788 default:
1789 break;
ef1ba606 1790 }
61135582 1791 link->activated = true;
f882c247 1792
9ed794a3 1793 if (link->network->bridge) {
e1853b00 1794 r = link_set_bridge(link);
6a7a4e4d
LP		 1795 if (r < 0)
1796 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1797
1798 r = link_append_to_master(link, link->network->bridge);
1799 if (r < 0)
1800 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1801 }
1802
eb64b435 1803 if (link->network->bond) {
7fcee284 1804 r = link_set_bond(link);
eb64b435
SS		 1805 if (r < 0)
1806 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1807
45e11abf 1808 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1809 if (r < 0)
1810 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1811 }
1812
34d7f2c9
YW		 1813 r = link_set_bridge_vlan(link);
1814 if (r < 0)
1815 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1816
c1835a42
RM		 1817 /* Skip setting up addresses until it gets carrier,
1818 or it would try to set addresses twice,
1819 which is bad for non-idempotent steps. */
dad2d78e 1820 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1821 return 0;
1822
b425c3ae 1823 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1824
1825 r = link_acquire_conf(link);
1826 if (r < 0)
1827 return r;
1828
682c65b0 1829 return link_set_static_configs(link);
02b59d57
TG		 1830}
1831
302a796f 1832static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1833 int r;
1834
1746cf2a 1835 assert(link);
ef1ba606 1836 assert(link->network);
34bf3c00 1837 assert(link->enslaving > 0);
02b59d57 1838
313cefa1 1839 link->enslaving--;
52433f6b 1840
5da8149f 1841 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1842 return 1;
1843
1c4baffc 1844 r = sd_netlink_message_get_errno(m);
856f962c 1845 if (r < 0 && r != -EEXIST) {
5ecb131d 1846 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1847 link_enter_failed(link);
1848 return 1;
4ff296b0
YW		 1849 }
1850
1851 log_link_debug(link, "Joined netdev");
02b59d57 1852
34bf3c00 1853 if (link->enslaving == 0) {
4ff296b0
YW		 1854 r = link_joined(link);
1855 if (r < 0)
1856 link_enter_failed(link);
34bf3c00 1857 }
02b59d57
TG		 1858
1859 return 1;
1860}
1861
3f265037 1862static int link_enter_join_netdev(Link *link) {
6a0a2f86 1863 NetDev *netdev;
02b59d57
TG		 1864 int r;
1865
1866 assert(link);
1867 assert(link->network);
bd08ce56 1868 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1869
289e6774 1870 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1871
34bf3c00 1872 link->enslaving = 0;
02b59d57 1873
d9c67ea1 1874 if (link->network->bond) {
cbff7170
TJ		 1875 if (link->network->bond->state == NETDEV_STATE_READY &&
1876 link->network->bond->ifindex == link->master_ifindex)
1877 return link_joined(link);
1878
f2341e0a
LP		 1879 log_struct(LOG_DEBUG,
1880 LOG_LINK_INTERFACE(link),
1881 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1882 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1883
34bf3c00
YW		 1884 link->enslaving++;
1885
f2341e0a 1886 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1887 if (r < 0) {
f2341e0a
LP		 1888 log_struct_errno(LOG_WARNING, r,
1889 LOG_LINK_INTERFACE(link),
1890 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1891 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1892 link_enter_failed(link);
1893 return r;
1894 }
0ad6148e
MO		 1895 }
1896
d9c67ea1 1897 if (link->network->bridge) {
f2341e0a
LP		 1898 log_struct(LOG_DEBUG,
1899 LOG_LINK_INTERFACE(link),
1900 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1901 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1902
34bf3c00
YW		 1903 link->enslaving++;
1904
f2341e0a 1905 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1906 if (r < 0) {
f2341e0a
LP		 1907 log_struct_errno(LOG_WARNING, r,
1908 LOG_LINK_INTERFACE(link),
1909 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1910 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1911 link_enter_failed(link);
1912 return r;
1913 }
52433f6b
TG		 1914 }
1915
6cb955c6
AR		 1916 if (link->network->vrf) {
1917 log_struct(LOG_DEBUG,
1918 LOG_LINK_INTERFACE(link),
1919 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1920 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1921
34bf3c00
YW		 1922 link->enslaving++;
1923
6cb955c6
AR		 1924 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1925 if (r < 0) {
1926 log_struct_errno(LOG_WARNING, r,
1927 LOG_LINK_INTERFACE(link),
1928 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1929 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1930 link_enter_failed(link);
1931 return r;
1932 }
6cb955c6
AR		 1933 }
1934
90e74a66 1935 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1936
2b6db913
YW		 1937 if (netdev->ifindex > 0)
1938 /* Assume already enslaved. */
a63e5daa 1939 continue;
a63e5daa 1940
7033af49
YW		 1941 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1942 continue;
1943
f2341e0a
LP		 1944 log_struct(LOG_DEBUG,
1945 LOG_LINK_INTERFACE(link),
1946 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1947 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1948
34bf3c00
YW		 1949 link->enslaving++;
1950
f2341e0a 1951 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1952 if (r < 0) {
f2341e0a
LP		 1953 log_struct_errno(LOG_WARNING, r,
1954 LOG_LINK_INTERFACE(link),
1955 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1956 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1957 link_enter_failed(link);
1958 return r;
1959 }
326cb406
SS		 1960 }
1961
34bf3c00
YW		 1962 if (link->enslaving == 0)
1963 return link_joined(link);
1964
ef1ba606
TG		 1965 return 0;
1966}
1967
5e5b137a 1968static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1969 int k, r;
1970
1971 assert(link);
1972 assert(link->manager);
5e5b137a 1973
f8f2f880 1974 r = link_drop_foreign_addresses(link);
5e5b137a 1975
0b81225e
YW		 1976 k = link_drop_foreign_neighbors(link);
1977 if (k < 0 && r >= 0)
1978 r = k;
1979
1980 k = link_drop_foreign_routes(link);
1981 if (k < 0 && r >= 0)
1982 r = k;
d1bdafd2 1983
0b81225e
YW		 1984 k = manager_drop_foreign_routing_policy_rules(link->manager);
1985 if (k < 0 && r >= 0)
1986 r = k;
1987
1988 return r;
5e5b137a
TG		 1989}
1990
3104883d 1991static int link_drop_config(Link *link) {
0b81225e
YW		 1992 int k, r;
1993
1994 assert(link);
1995 assert(link->manager);
3104883d 1996
d7fbb9f5 1997 r = link_drop_addresses(link);
3104883d 1998
0b81225e
YW		 1999 k = link_drop_neighbors(link);
2000 if (k < 0 && r >= 0)
2001 r = k;
d1bdafd2 2002
0b81225e
YW		 2003 k = link_drop_routes(link);
2004 if (k < 0 && r >= 0)
2005 r = k;
2006
2007 k = manager_drop_routing_policy_rules(link->manager, link);
2008 if (k < 0 && r >= 0)
2009 r = k;
3104883d 2010
c69305ff
LP		 2011 ndisc_flush(link);
2012
0b81225e 2013 return r;
3104883d
SS		 2014}
2015
256c75fd 2016int link_configure(Link *link) {
4ecdcb07
YW		 2017 int r;
2018
ef1ba606 2019 assert(link);
b22d8a00 2020 assert(link->network);
bd08ce56 2021 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2022
34658df2 2023 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2024 if (r < 0)
2025 return r;
2026
518cd6b5
SS		 2027 r = link_configure_sr_iov(link);
2028 if (r < 0)
2029 return r;
2030
500b96eb 2031 if (link->iftype == ARPHRD_CAN)
93ea7750 2032 return link_configure_can(link);
92c918b0 2033
5e0534f1 2034 r = link_set_sysctl(link);
b69c3180
SS		 2035 if (r < 0)
2036 return r;
8749cbcd 2037
e16e4b3b
DS		 2038 r = link_set_mac(link);
2039 if (r < 0)
2040 return r;
2041
2042 r = link_set_nomaster(link);
2043 if (r < 0)
2044 return r;
2045
99d2baa2
SS		 2046 r = link_set_flags(link);
2047 if (r < 0)
2048 return r;
2049
89fe6535
SS		 2050 r = link_set_group(link);
2051 if (r < 0)
2052 return r;
2053
2ffd6d73
YW		 2054 r = ipv4ll_configure(link);
2055 if (r < 0)
2056 return r;
64b21ece 2057
2ffd6d73
YW		 2058 r = dhcp4_configure(link);
2059 if (r < 0)
2060 return r;
eb34d4af 2061
2ffd6d73
YW		 2062 r = dhcp6_configure(link);
2063 if (r < 0)
2064 return r;
f5a8c43f 2065
2ffd6d73
YW		 2066 r = ndisc_configure(link);
2067 if (r < 0)
2068 return r;
4138fb2c 2069
086b8853
YW		 2070 r = radv_configure(link);
2071 if (r < 0)
2072 return r;
7465dd22 2073
2ffd6d73
YW		 2074 r = link_lldp_rx_configure(link);
2075 if (r < 0)
2076 return r;
ce43e484 2077
f6fcc1c2 2078 r = link_configure_mtu(link);
40288ece
YW		 2079 if (r < 0)
2080 return r;
44b598a1 2081
9f6e82e6
YW		 2082 r = link_configure_addrgen_mode(link);
2083 if (r < 0)
2084 return r;
0e2fdb83 2085
3a390124
DS		 2086 return link_configure_continue(link);
2087}
2088
2089/* The configuration continues in this separate function, instead of
2090 * including this in the above link_configure() function, for two
2091 * reasons:
2092 * 1) some devices reset the link when the mtu is set, which caused
2093 * an infinite loop here in networkd; see:
2094 * https://github.com/systemd/systemd/issues/6593
2095 * https://github.com/systemd/systemd/issues/9831
2096 * 2) if ipv6ll is disabled, then bringing the interface up must be
2097 * delayed until after we get confirmation from the kernel that
2098 * the addr_gen_mode parameter has been set (via netlink), see:
2099 * https://github.com/systemd/systemd/issues/13882
2100 */
2101static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2102 int r;
2103
2104 assert(link);
2105 assert(link->network);
bd08ce56 2106 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2107
9524014e 2108 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2109 return 0;
2110
4c649652
DS		 2111 /* Drop foreign config, but ignore loopback or critical devices.
2112 * We do not want to remove loopback address or addresses used for root NFS. */
2113 if (!(link->flags & IFF_LOOPBACK) &&
2114 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2115 r = link_drop_foreign_config(link);
2116 if (r < 0)
2117 return r;
2118 }
2119
d236718c
DS		 2120 /* The kernel resets ipv6 mtu after changing device mtu;
2121 * we must set this here, after we've set device mtu */
2122 r = link_set_ipv6_mtu(link);
2123 if (r < 0)
5e0534f1 2124 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2125
3f265037 2126 return link_enter_join_netdev(link);
505f8da7
TG		 2127}
2128
572b21d9 2129static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2130 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2131 Network *network;
2132 int r;
2133
8bceafa7 2134 assert(m);
572b21d9 2135
8bceafa7
YW		 2136 r = sd_netlink_message_get_errno(m);
2137 if (r < 0)
2138 return r;
572b21d9 2139
8bceafa7
YW		 2140 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2141 if (r < 0 && r != -ENODATA)
2142 return r;
572b21d9 2143
8bceafa7 2144 strv_free_and_replace(link->alternative_names, s);
572b21d9 2145
c643bda5
YW		 2146 r = network_get(link->manager, link->iftype, link->sd_device,
2147 link->ifname, link->alternative_names, link->driver,
b8162cd2 2148 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2149 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2150 if (r == -ENOENT) {
2151 link_enter_unmanaged(link);
2152 return 0;
2153 } else if (r == 0 && network->unmanaged) {
2154 link_enter_unmanaged(link);
2155 return 0;
2156 } else if (r < 0)
2157 return r;
2158
99b8517c 2159 if (link->network == network && !force)
ad932b15
YW		 2160 return 0;
2161
2162 log_link_info(link, "Re-configuring with %s", network->filename);
2163
2164 /* Dropping old .network file */
2a99eed0 2165 r = link_stop_engines(link, false);
572b21d9 2166 if (r < 0)
ad932b15 2167 return r;
ad932b15 2168
ad932b15
YW		 2169 r = link_drop_config(link);
2170 if (r < 0)
2171 return r;
2172
2c7b826d 2173 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2174 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2175 r = link_drop_foreign_config(link);
2176 if (r < 0)
2177 return r;
2178 }
2179
2180 link_free_carrier_maps(link);
2181 link_free_engines(link);
2182 link->network = network_unref(link->network);
59c31eba 2183 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2184
2185 /* Then, apply new .network file */
9092113d
YW		 2186 link->network = network_ref(network);
2187 link_dirty(link);
ad932b15
YW		 2188
2189 r = link_new_carrier_maps(link);
2190 if (r < 0)
2191 return r;
2192
2193 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2194 link->activated = false;
ad932b15
YW		 2195
2196 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2197 * link_configure() is called later asynchronously. */
2198 r = link_configure_duid(link);
2199 if (r <= 0)
2200 return r;
2201
2202 r = link_configure(link);
2203 if (r < 0)
2204 return r;
2205
2206 return 0;
2207}
2208
572b21d9
YW		 2209static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2210 int r;
2211
2212 r = link_reconfigure_internal(link, m, false);
2213 if (r < 0)
2214 link_enter_failed(link);
2215
2216 return 1;
2217}
2218
2219static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2220 int r;
2221
2222 r = link_reconfigure_internal(link, m, true);
2223 if (r < 0)
2224 link_enter_failed(link);
2225
2226 return 1;
2227}
2228
2229int link_reconfigure(Link *link, bool force) {
2230 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2231 int r;
2232
8bceafa7 2233 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2234 * the function from being called multiple times simultaneously, refuse to reconfigure the
2235 * interface in these cases. */
8bceafa7 2236 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2237 return 0; /* 0 means no-op. */
2c0d7ed3 2238
572b21d9
YW		 2239 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2240 link->ifindex);
2241 if (r < 0)
2242 return r;
2243
2244 r = netlink_call_async(link->manager->rtnl, NULL, req,
2245 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2246 link_netlink_destroy_callback, link);
2247 if (r < 0)
2248 return r;
2249
2250 link_ref(link);
2251
8bceafa7 2252 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2253}
2254
e6bf7774 2255static int link_initialized_and_synced(Link *link) {
505f8da7 2256 Network *network;
505f8da7
TG		 2257 int r;
2258
2259 assert(link);
2260 assert(link->ifname);
2261 assert(link->manager);
2262
bd08ce56
YW		 2263 /* We may get called either from the asynchronous netlink callback,
2264 * or directly for link_add() if running in a container. See link_add(). */
2265 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2266 return 0;
505f8da7 2267
6a7a4e4d 2268 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2269 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2270
0d4ad91d
AR		 2271 r = link_new_bound_by_list(link);
2272 if (r < 0)
2273 return r;
2274
2275 r = link_handle_bound_by_list(link);
2276 if (r < 0)
2277 return r;
2278
c4a03a56 2279 if (!link->network) {
0894cfe4 2280 r = wifi_get_info(link);
8d968fdd
YW		 2281 if (r < 0)
2282 return r;
2283
c643bda5
YW		 2284 r = network_get(link->manager, link->iftype, link->sd_device,
2285 link->ifname, link->alternative_names, link->driver,
b8162cd2 2286 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2287 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2288 if (r == -ENOENT) {
2289 link_enter_unmanaged(link);
4232cf04 2290 return 0;
a09dc546
DM		 2291 } else if (r == 0 && network->unmanaged) {
2292 link_enter_unmanaged(link);
2293 return 0;
c4a03a56
TG		 2294 } else if (r < 0)
2295 return r;
505f8da7 2296
c4a03a56
TG		 2297 if (link->flags & IFF_LOOPBACK) {
2298 if (network->link_local != ADDRESS_FAMILY_NO)
2299 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2300
c4a03a56
TG		 2301 if (network->dhcp != ADDRESS_FAMILY_NO)
2302 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2303
c4a03a56
TG		 2304 if (network->dhcp_server)
2305 log_link_debug(link, "Ignoring DHCP server for loopback link");
2306 }
bd2efe92 2307
9092113d
YW		 2308 link->network = network_ref(network);
2309 link_dirty(link);
c4a03a56 2310 }
505f8da7 2311
0d4ad91d
AR		 2312 r = link_new_bound_to_list(link);
2313 if (r < 0)
2314 return r;
2315
27dfc982
YW		 2316 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2317 * link_configure() is called later asynchronously. */
2318 r = link_configure_duid(link);
2319 if (r <= 0)
2320 return r;
2321
a748b692
TG		 2322 r = link_configure(link);
2323 if (r < 0)
2324 return r;
2325
4232cf04 2326 return 0;
505f8da7
TG		 2327}
2328
302a796f 2329static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2330 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2331 int r;
2332
572b21d9
YW		 2333 r = sd_netlink_message_get_errno(m);
2334 if (r < 0) {
40681e5c 2335 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2336 link_enter_failed(link);
2337 return 0;
2338 }
2339
2340 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2341 if (r < 0 && r != -ENODATA) {
2342 link_enter_failed(link);
2343 return 0;
2344 }
2345
2346 strv_free_and_replace(link->alternative_names, s);
2347
4ff296b0
YW		 2348 r = link_initialized_and_synced(link);
2349 if (r < 0)
2350 link_enter_failed(link);
e6bf7774
YW		 2351 return 1;
2352}
2353
51517f9e 2354int link_initialized(Link *link, sd_device *device) {
4afd3348 2355 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2356 int r;
2357
2358 assert(link);
2359 assert(link->manager);
2360 assert(link->manager->rtnl);
2361 assert(device);
2362
8434fd5c 2363 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2364 return 0;
2365
51517f9e 2366 if (link->sd_device)
679b3605
TG		 2367 return 0;
2368
79008bdd 2369 log_link_debug(link, "udev initialized link");
bd08ce56 2370 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2371
51517f9e 2372 link->sd_device = sd_device_ref(device);
4f561e8e 2373
3c9b8860
TG		 2374 /* udev has initialized the link, but we don't know if we have yet
2375 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2376 * when it returns we know that the pending NEWLINKs have already been
2377 * processed and that we are up-to-date */
4f561e8e 2378
3c9b8860
TG		 2379 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2380 link->ifindex);
4f561e8e
TG		 2381 if (r < 0)
2382 return r;
2383
302a796f
YW		 2384 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2385 link_netlink_destroy_callback, link);
4f561e8e
TG		 2386 if (r < 0)
2387 return r;
2388
5da8149f
TG		 2389 link_ref(link);
2390
4f561e8e
TG		 2391 return 0;
2392}
2393
1c4baffc 2394int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2395 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2396 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2397 Link *link;
5a937ea2 2398 int r;
505f8da7
TG		 2399
2400 assert(m);
fbbeb65a 2401 assert(m->rtnl);
505f8da7
TG		 2402 assert(message);
2403 assert(ret);
2404
2405 r = link_new(m, message, ret);
2406 if (r < 0)
2407 return r;
2408
2409 link = *ret;
2410
6a7a4e4d 2411 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2412
bf331d87
YW		 2413 if (path_is_read_only_fs("/sys") <= 0) {
2414 /* udev should be around */
ae06ab10 2415 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2416 r = sd_device_new_from_device_id(&device, ifindex_str);
2417 if (r < 0) {
4d59e14f
YW		 2418 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2419 return 0;
5c416fc4 2420 }
505f8da7 2421
5a937ea2 2422 r = sd_device_get_is_initialized(device);
51517f9e 2423 if (r < 0) {
bf331d87 2424 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2425 goto failed;
2426 }
5a937ea2 2427 if (r == 0) {
505f8da7 2428 /* not yet ready */
79008bdd 2429 log_link_debug(link, "link pending udev initialization...");
505f8da7 2430 return 0;
3c4cb064 2431 }
505f8da7 2432
299ad32d
YW		 2433 r = device_is_renaming(device);
2434 if (r < 0) {
bf331d87 2435 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2436 goto failed;
2437 }
2438 if (r > 0) {
bf331d87 2439 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2440 return 0;
2441 }
2442
4f561e8e
TG		 2443 r = link_initialized(link, device);
2444 if (r < 0)
5c416fc4 2445 goto failed;
4f561e8e 2446 } else {
e6bf7774 2447 r = link_initialized_and_synced(link);
4f561e8e 2448 if (r < 0)
5c416fc4 2449 goto failed;
4f561e8e 2450 }
505f8da7 2451
a748b692 2452 return 0;
5c416fc4
TG		 2453failed:
2454 link_enter_failed(link);
2455 return r;
a748b692
TG		 2456}
2457
c601ebf7 2458int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2459 int r;
2460
2461 assert(link);
2462
2463 log_link_info(link, "Gained IPv6LL");
2464
c601ebf7 2465 link->ipv6ll_address = *address;
e7ab854c
TG		 2466 link_check_ready(link);
2467
b9ea3d2e 2468 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2469 r = link_acquire_ipv6_conf(link);
2470 if (r < 0) {
2471 link_enter_failed(link);
2472 return r;
2473 }
2474 }
2475
2476 return 0;
2477}
2478
9c0a72f9
TG		 2479static int link_carrier_gained(Link *link) {
2480 int r;
2481
2482 assert(link);
2483
0894cfe4 2484 r = wifi_get_info(link);
8d968fdd
YW		 2485 if (r < 0)
2486 return r;
2487 if (r > 0) {
8bceafa7 2488 r = link_reconfigure(link, false);
572b21d9
YW		 2489 if (r < 0) {
2490 link_enter_failed(link);
8d968fdd 2491 return r;
572b21d9 2492 }
8d968fdd
YW		 2493 }
2494
b9ea3d2e 2495 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2496 r = link_acquire_conf(link);
2497 if (r < 0) {
2498 link_enter_failed(link);
2499 return r;
2500 }
6fc25497 2501
b425c3ae 2502 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2503 r = link_set_static_configs(link);
6fc25497
SS		 2504 if (r < 0)
2505 return r;
9c0a72f9
TG		 2506 }
2507
0d4ad91d
AR		 2508 r = link_handle_bound_by_list(link);
2509 if (r < 0)
2510 return r;
2511
1f241589
YW		 2512 if (!link->bridge_mdb_configured) {
2513 r = link_set_bridge_mdb(link);
2514 if (r < 0)
2515 return r;
2516 }
2517
2518 if (streq_ptr(link->kind, "bridge")) {
2519 Link *slave;
2520
2521 SET_FOREACH(slave, link->slaves) {
2522 if (slave->bridge_mdb_configured)
2523 continue;
2524
2525 r = link_set_bridge_mdb(slave);
2526 if (r < 0)
2527 link_enter_failed(slave);
2528 }
2529 }
3db468ea 2530
9c0a72f9
TG		 2531 return 0;
2532}
2533
2534static int link_carrier_lost(Link *link) {
2535 int r;
2536
2537 assert(link);
2538
25e992ba 2539 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2540 return 0;
2541
fbdb6605 2542 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2543 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2544 * configuration and stop the clients as well. */
97e7fb39
SS		 2545 if (link->setting_mtu)
2546 return 0;
2547
2a99eed0 2548 r = link_stop_engines(link, false);
9c0a72f9
TG		 2549 if (r < 0) {
2550 link_enter_failed(link);
2551 return r;
2552 }
2553
3104883d
SS		 2554 r = link_drop_config(link);
2555 if (r < 0)
2556 return r;
2557
2c7b826d 2558 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2559 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2560 r = link_drop_foreign_config(link);
2561 if (r < 0)
2562 return r;
2563 }
3104883d 2564
0d4ad91d
AR		 2565 r = link_handle_bound_by_list(link);
2566 if (r < 0)
2567 return r;
2568
9c0a72f9
TG		 2569 return 0;
2570}
2571
2572int link_carrier_reset(Link *link) {
2573 int r;
2574
2575 assert(link);
2576
2577 if (link_has_carrier(link)) {
2578 r = link_carrier_lost(link);
2579 if (r < 0)
2580 return r;
2581
2582 r = link_carrier_gained(link);
2583 if (r < 0)
2584 return r;
2585
6a7a4e4d 2586 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2587 }
2588
2589 return 0;
2590}
2591
d236718c
DS		 2592/* This is called every time an interface admin state changes to up;
2593 * specifically, when IFF_UP flag changes from unset to set */
2594static int link_admin_state_up(Link *link) {
2595 int r;
2596
61135582
DS		 2597 assert(link);
2598
2599 if (!link->network)
2600 return 0;
2601
2602 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2603 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2604 return link_down(link, NULL);
2605 }
2606
d236718c
DS		 2607 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2608 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2609 * ipv6_mtu_set prevents this from trying to set it too early before
2610 * the link->network has been setup; we only need to reset it
2611 * here if we've already set it during normal initialization. */
2612 if (link->ipv6_mtu_set) {
2613 r = link_set_ipv6_mtu(link);
2614 if (r < 0)
2615 return r;
2616 }
2617
2618 return 0;
2619}
2620
61135582
DS		 2621static int link_admin_state_down(Link *link) {
2622
2623 assert(link);
2624
2625 if (!link->network)
2626 return 0;
2627
2628 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
2629 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2630 return link_up(link);
2631 }
2632
2633 return 0;
2634}
2635
1c4baffc 2636int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2637 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2638 hw_addr_data hw_addr;
ca4e095a 2639 const char *ifname;
afe7fd56 2640 uint32_t mtu;
d236718c 2641 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2642 int old_master, r;
22936833 2643
dd3efc09 2644 assert(link);
b8941f74 2645 assert(link->ifname);
22936833
TG		 2646 assert(m);
2647
7619683b 2648 if (link->state == LINK_STATE_LINGER) {
5238e957 2649 log_link_info(link, "Link re-added");
289e6774 2650 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2651
2652 r = link_new_carrier_maps(link);
2653 if (r < 0)
2654 return r;
7619683b
TG		 2655 }
2656
1c4baffc 2657 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2658 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2659 Manager *manager = link->manager;
b8941f74 2660
30de2b89 2661 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2662
30de2b89
YW		 2663 link_drop(link);
2664 r = link_add(manager, m, &link);
2665 if (r < 0)
2666 return r;
b8941f74
TG		 2667 }
2668
572b21d9
YW		 2669 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2670 if (r >= 0)
2671 strv_free_and_replace(link->alternative_names, s);
2672
1c4baffc 2673 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2674 if (r >= 0 && mtu > 0) {
2675 link->mtu = mtu;
4e964aa0 2676 if (link->original_mtu == 0) {
afe7fd56 2677 link->original_mtu = mtu;
6a7a4e4d 2678 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2679 }
2680
2681 if (link->dhcp_client) {
3c9b8860
TG		 2682 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2683 link->mtu);
fc95c359
YW		 2684 if (r < 0)
2685 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2686 }
7465dd22
PF		 2687
2688 if (link->radv) {
2689 r = sd_radv_set_mtu(link->radv, link->mtu);
2690 if (r < 0)
2691 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2692 }
9842de0d 2693 }
69629de9 2694
e9189a1f
TG		 2695 /* The kernel may broadcast NEWLINK messages without the MAC address
2696 set, simply ignore them. */
b8162cd2
TR		 2697 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2698 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2699 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2700
b8162cd2 2701 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2702
b8162cd2 2703 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2704
a3adb4a6
YW		 2705 r = ipv4ll_update_mac(link);
2706 if (r < 0)
2707 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2708
d947f7f9
YW		 2709 r = dhcp4_update_mac(link);
2710 if (r < 0)
2711 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2712
eebba6dc
YW		 2713 r = dhcp6_update_mac(link);
2714 if (r < 0)
2715 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2716
d0c4275c 2717 r = radv_update_mac(link);
be9363cc
YW		 2718 if (r < 0)
2719 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2720
2721 if (link->ndisc) {
b8162cd2 2722 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2723 if (r < 0)
2724 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2725 }
d93d655c
YW		 2726
2727 r = ipv4_dad_update_mac(link);
2728 if (r < 0)
2729 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2730 }
2731
bb262ef0
YW		 2732 old_master = link->master_ifindex;
2733 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2734
d236718c 2735 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2736 had_carrier = link_has_carrier(link);
2737
bb262ef0 2738 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2739 if (r < 0)
2740 return r;
2741
d236718c
DS		 2742 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2743 log_link_info(link, "Link UP");
2744
2745 r = link_admin_state_up(link);
2746 if (r < 0)
2747 return r;
61135582 2748 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2749 log_link_info(link, "Link DOWN");
2750
61135582
DS		 2751 r = link_admin_state_down(link);
2752 if (r < 0)
2753 return r;
2754 }
2755
273eec24
LP		 2756 r = link_update_lldp(link);
2757 if (r < 0)
2758 return r;
2759
a61bb41c
TG		 2760 carrier_gained = !had_carrier && link_has_carrier(link);
2761 carrier_lost = had_carrier && !link_has_carrier(link);
2762
2763 if (carrier_gained) {
6a7a4e4d 2764 log_link_info(link, "Gained carrier");
a61bb41c 2765
9c0a72f9
TG		 2766 r = link_carrier_gained(link);
2767 if (r < 0)
2768 return r;
a61bb41c 2769 } else if (carrier_lost) {
6a7a4e4d 2770 log_link_info(link, "Lost carrier");
a61bb41c 2771
9c0a72f9
TG		 2772 r = link_carrier_lost(link);
2773 if (r < 0)
a61bb41c 2774 return r;
a61bb41c
TG		 2775 }
2776
2777 return 0;
dd3efc09 2778}
fe8db0c5 2779
b295beea
LP		 2780static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2781 bool space = false;
b295beea
LP		 2782 Link *link;
2783
2784 assert(f);
2785 assert(prefix);
2786
2787 if (hashmap_isempty(h))
2788 return;
2789
0d536673 2790 fputs(prefix, f);
90e74a66 2791 HASHMAP_FOREACH(link, h) {
b295beea 2792 if (space)
0d536673 2793 fputc(' ', f);
b295beea
LP		 2794
2795 fprintf(f, "%i", link->ifindex);
2796 space = true;
2797 }
2798
0d536673 2799 fputc('\n', f);
b295beea
LP		 2800}
2801
64581765 2802static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2803 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2804 const char *str;
15761549 2805
64581765
YW		 2806 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2807 continue;
2808
e77bd3fd
YW		 2809 str = in_addr_full_to_string(dns[j]);
2810 if (!str)
15761549 2811 continue;
15761549
YW		 2812
2813 if (*space)
2814 fputc(' ', f);
e77bd3fd 2815 fputs(str, f);
15761549
YW		 2816 *space = true;
2817 }
2818}
2819
d5e172d2
ZJS		 2820static void serialize_addresses(
2821 FILE *f,
2822 const char *lvalue,
2823 bool *space,
2824 char **addresses,
2825 sd_dhcp_lease *lease,
2826 bool conditional,
ddb82ec2 2827 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2828 sd_dhcp6_lease *lease6,
2829 bool conditional6,
2830 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2831 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2832 int r;
2833
2834 bool _space = false;
2835 if (!space)
2836 space = &_space;
2837
2838 if (lvalue)
2839 fprintf(f, "%s=", lvalue);
2840 fputstrv(f, addresses, NULL, space);
2841
2842 if (lease && conditional) {
2843 const struct in_addr *lease_addresses;
2844
2845 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2846 if (r > 0)
d8bff5cc 2847 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2848 }
2849
2850 if (lease6 && conditional6 && lease6_get_addr) {
2851 const struct in6_addr *in6_addrs;
2852
2853 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2854 if (r > 0)
2855 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2856 }
2857
2858 if (lease6 && conditional6 && lease6_get_fqdn) {
2859 char **in6_hosts;
2860
2861 r = lease6_get_fqdn(lease6, &in6_hosts);
2862 if (r > 0)
2863 fputstrv(f, in6_hosts, NULL, space);
2864 }
2865
2866 if (lvalue)
2867 fputc('\n', f);
2868}
2869
fe8db0c5 2870int link_save(Link *link) {
d361b373 2871 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2872 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2873 _cleanup_fclose_ FILE *f = NULL;
2874 int r;
2875
2876 assert(link);
2877 assert(link->state_file);
68a8723c 2878 assert(link->lease_file);
bbf7c048
TG		 2879 assert(link->manager);
2880
370e9930 2881 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2882 (void) unlink(link->state_file);
370e9930
TG		 2883 return 0;
2884 }
2885
34437b4f
LP		 2886 link_lldp_save(link);
2887
deb2e523
TG		 2888 admin_state = link_state_to_string(link->state);
2889 assert(admin_state);
2890
e375dcde
TG		 2891 oper_state = link_operstate_to_string(link->operstate);
2892 assert(oper_state);
deb2e523 2893
ac999bf0
YW		 2894 carrier_state = link_carrier_state_to_string(link->carrier_state);
2895 assert(carrier_state);
2896
2897 address_state = link_address_state_to_string(link->address_state);
2898 assert(address_state);
2899
fe8db0c5
TG		 2900 r = fopen_temporary(link->state_file, &f, &temp_path);
2901 if (r < 0)
6a7a4e4d 2902 goto fail;
fe8db0c5 2903
5512a963 2904 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2905
2906 fprintf(f,
2907 "# This is private data. Do not parse.\n"
deb2e523 2908 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2909 "OPER_STATE=%s\n"
2910 "CARRIER_STATE=%s\n"
2911 "ADDRESS_STATE=%s\n",
2912 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2913
bcb7a07e 2914 if (link->network) {
fe0e16db
YW		 2915 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2916 const char *dhcp_domainname = NULL, *p;
fe0e16db 2917 bool space;
07bdc70d 2918
c1a38904
MTL		 2919 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2920 yes_no(link->network->required_for_online));
2921
d5e172d2
ZJS		 2922 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2923 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2924 strempty(link_operstate_to_string(st.min)),
2925 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2926 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2927
a853652a
DS		 2928 fprintf(f, "ACTIVATION_POLICY=%s\n",
2929 activation_policy_to_string(link->network->activation_policy));
2930
adc5b2e2
TG		 2931 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2932
d5e172d2
ZJS		 2933 /************************************************************/
2934
0d536673 2935 fputs("DNS=", f);
ea352b40 2936 space = false;
15761549 2937 if (link->n_dns != (unsigned) -1)
64581765 2938 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2939 else
64581765 2940 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2941
d5e172d2
ZJS		 2942 serialize_addresses(f, NULL, &space,
2943 NULL,
2944 link->dhcp_lease,
2945 link->network->dhcp_use_dns,
ddb82ec2 2946 SD_DHCP_LEASE_DNS,
1633c457 2947 link->dhcp6_lease,
d5e172d2
ZJS		 2948 link->network->dhcp6_use_dns,
2949 sd_dhcp6_lease_get_dns,
2950 NULL);
1e7a0e21 2951
a8c10331 2952 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2953 ndisc_vacuum(link);
2954
b296797f 2955 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2956 NDiscRDNSS *dd;
2957
90e74a66 2958 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2959 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2960 }
2961
2962 fputc('\n', f);
2963
d5e172d2
ZJS		 2964 /************************************************************/
2965
2966 serialize_addresses(f, "NTP", NULL,
2967 link->ntp ?: link->network->ntp,
2968 link->dhcp_lease,
2969 link->network->dhcp_use_ntp,
ddb82ec2 2970 SD_DHCP_LEASE_NTP,
1633c457 2971 link->dhcp6_lease,
d5e172d2
ZJS		 2972 link->network->dhcp6_use_ntp,
2973 sd_dhcp6_lease_get_ntp_addrs,
2974 sd_dhcp6_lease_get_ntp_fqdn);
2975
2976 serialize_addresses(f, "SIP", NULL,
2a71d57f 2977 NULL,
d5e172d2
ZJS		 2978 link->dhcp_lease,
2979 link->network->dhcp_use_sip,
ddb82ec2 2980 SD_DHCP_LEASE_SIP,
2a71d57f 2981 NULL, false, NULL, NULL);
d5e172d2
ZJS		 2982
2983 /************************************************************/
bd8f6538 2984
b2a81c0b 2985 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 2986 if (link->dhcp_lease) {
b2a81c0b 2987 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 2988 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
2989 }
1633c457
YW		 2990 if (link->dhcp6_lease)
2991 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 2992 }
2993
fe0e16db
YW		 2994 fputs("DOMAINS=", f);
2995 space = false;
90e74a66 2996 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 2997 fputs_with_space(f, p, NULL, &space);
07bdc70d 2998
1e7a0e21 2999 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3000 if (dhcp_domainname)
3001 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3002 if (dhcp_domains)
3003 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3004 if (dhcp6_domains)
3005 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3006 }
3007
3008 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3009 NDiscDNSSL *dd;
1e7a0e21 3010
90e74a66 3011 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3012 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3013 }
b2a81c0b 3014
0d536673 3015 fputc('\n', f);
6192b846 3016
d5e172d2
ZJS		 3017 /************************************************************/
3018
fe0e16db
YW		 3019 fputs("ROUTE_DOMAINS=", f);
3020 space = false;
90e74a66 3021 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3022 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3023
1e7a0e21 3024 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3025 if (dhcp_domainname)
3026 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3027 if (dhcp_domains)
3028 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3029 if (dhcp6_domains)
3030 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3031 }
3032
3033 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3034 NDiscDNSSL *dd;
1e7a0e21 3035
90e74a66 3036 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3037 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3038 }
b2a81c0b 3039
0d536673 3040 fputc('\n', f);
67272d15 3041
d5e172d2
ZJS		 3042 /************************************************************/
3043
3c9b8860 3044 fprintf(f, "LLMNR=%s\n",
15761549 3045 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3046
3047 /************************************************************/
3048
aaa297d4 3049 fprintf(f, "MDNS=%s\n",
15761549 3050 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3051
d5e172d2
ZJS		 3052 /************************************************************/
3053
3054 int dns_default_route =
3055 link->dns_default_route >= 0 ? link->dns_default_route :
3056 link->network->dns_default_route;
3057 if (dns_default_route >= 0)
3058 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3059
3060 /************************************************************/
3061
3062 DnsOverTlsMode dns_over_tls_mode =
3063 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3064 link->network->dns_over_tls_mode;
3065 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3066 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3067
3068 /************************************************************/
3069
3070 DnssecMode dnssec_mode =
3071 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3072 link->network->dnssec_mode;
3073 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3074 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3075
3076 /************************************************************/
3077
3078 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3079 if (set_isempty(nta_anchors))
3080 nta_anchors = link->network->dnssec_negative_trust_anchors;
3081
3082 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3083 const char *n;
3084
0d536673 3085 fputs("DNSSEC_NTA=", f);
8a516214 3086 space = false;
90e74a66 3087 SET_FOREACH(n, nta_anchors)
d390f8ef 3088 fputs_with_space(f, n, NULL, &space);
0d536673 3089 fputc('\n', f);
8a516214 3090 }
bcb7a07e 3091 }
7374f9d8 3092
b295beea
LP		 3093 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3094 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3095
8eb9058d 3096 if (link->dhcp_lease) {
bd91b83e 3097 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3098 if (r < 0)
c2d6bd61 3099 goto fail;
fe8db0c5 3100
7374f9d8 3101 fprintf(f,
b0e39c82
TG		 3102 "DHCP_LEASE=%s\n",
3103 link->lease_file);
deb2e523 3104 } else
6990fb6b 3105 (void) unlink(link->lease_file);
fe8db0c5 3106
5460bde5
YW		 3107 r = link_serialize_dhcp6_client(link, f);
3108 if (r < 0)
3109 goto fail;
18d8a2cf 3110
c2d6bd61
LP		 3111 r = fflush_and_check(f);
3112 if (r < 0)
3113 goto fail;
fe8db0c5 3114
af664001
YW		 3115 r = conservative_rename(temp_path, link->state_file);
3116 if (r < 0)
c2d6bd61 3117 goto fail;
fe8db0c5 3118
c2d6bd61 3119 return 0;
dacd6cee 3120
c2d6bd61 3121fail:
6a7a4e4d 3122 (void) unlink(link->state_file);
6a7a4e4d
LP		 3123 if (temp_path)
3124 (void) unlink(temp_path);
3125
dacd6cee 3126 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3127}
3128
84de38c5
TG		 3129/* The serialized state in /run is no longer up-to-date. */
3130void link_dirty(Link *link) {
3131 int r;
3132
3133 assert(link);
3134
0c241a37
SS		 3135 /* mark manager dirty as link is dirty */
3136 manager_dirty(link->manager);
3137
de7fef4b 3138 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3139 if (r <= 0)
de7fef4b 3140 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3141 return;
84de38c5
TG		 3142 link_ref(link);
3143}
3144
3145/* The serialized state in /run is up-to-date */
3146void link_clean(Link *link) {
3147 assert(link);
3148 assert(link->manager);
3149
1046bf9b 3150 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3151}
3152
c2a65950
YW		 3153int link_save_and_clean(Link *link) {
3154 int r;
3155
3156 r = link_save(link);
3157 if (r < 0)
3158 return r;
3159
3160 link_clean(link);
3161 return 0;
3162}
3163
fe8db0c5 3164static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3165 [LINK_STATE_PENDING] = "pending",
bd08ce56 3166 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3167 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3168 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3169 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3170 [LINK_STATE_FAILED] = "failed",
370e9930 3171 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3172};
3173
3174DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3175
3176int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3177 const char *err_msg = NULL;
3178
3179 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3180 return log_link_full_errno(link, level, err,
3181 "%s: %s%s%s%m",
3182 msg,
3183 strempty(err_msg),
3184 err_msg && !endswith(err_msg, ".") ? "." : "",
3185 err_msg ? " " : "");
5ecb131d 3186}
Unnamed repository; edit this file 'description' to name the repository.