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[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
fb486c90 23#include "networkd-address-label.h"
093e3533 24#include "networkd-address.h"
3ddcbeea 25#include "networkd-can.h"
8fcf1d61 26#include "networkd-dhcp-server.h"
ca5ad760
YW		 27#include "networkd-dhcp4.h"
28#include "networkd-dhcp6.h"
ee446d57 29#include "networkd-fdb.h"
ca5ad760 30#include "networkd-ipv4ll.h"
a0e5c15d 31#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 32#include "networkd-link-bus.h"
33#include "networkd-link.h"
8e1ad1ea 34#include "networkd-lldp-tx.h"
23f53b99 35#include "networkd-manager.h"
dbf63196 36#include "networkd-mdb.h"
1e7a0e21 37#include "networkd-ndisc.h"
e4a71bf3 38#include "networkd-neighbor.h"
75156ccb 39#include "networkd-nexthop.h"
518cd6b5 40#include "networkd-sriov.h"
5e0534f1 41#include "networkd-sysctl.h"
7465dd22 42#include "networkd-radv.h"
bce67bbe 43#include "networkd-routing-policy-rule.h"
8d968fdd 44#include "networkd-wifi.h"
cf1d700d
TG		 45#include "set.h"
46#include "socket-util.h"
bf331d87 47#include "stat-util.h"
15a5e950 48#include "stdio-util.h"
8b43440b 49#include "string-table.h"
51517f9e 50#include "strv.h"
62e021a9 51#include "sysctl-util.h"
34658df2 52#include "tc.h"
e4de7287 53#include "tmpfile-util.h"
299ad32d 54#include "udev-util.h"
cf1d700d 55#include "util.h"
737f1405 56#include "vrf.h"
fc2f9534 57
3ca1fab7 58bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 59 assert(link);
60
78c958f8
TG		 61 if (link->flags & IFF_LOOPBACK)
62 return false;
63
64 if (!link->network)
65 return false;
66
500b96eb 67 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 68 return false;
69
98d20a17 70 if (STRPTR_IN_SET(link->kind,
71 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 72 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 73 return false;
74
f410d463
YW		 75 /* L3 or L3S mode do not support ARP. */
76 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
77 return false;
78
f2bfcdb9
YW		 79 if (link->network->bond)
80 return false;
81
3ca1fab7 82 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 83}
84
f8f2f880 85bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 86 assert(link);
87
fa709992
LP		 88 if (!socket_ipv6_is_supported())
89 return false;
90
d0d6a4cd
TG		 91 if (link->flags & IFF_LOOPBACK)
92 return false;
93
94 if (!link->network)
95 return false;
96
500b96eb 97 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 98 return false;
99
100 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 101 return false;
102
f2bfcdb9
YW		 103 if (link->network->bond)
104 return false;
105
e0ee46f2 106 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 107}
108
5e0534f1 109bool link_ipv6_enabled(Link *link) {
439689c6
SS		 110 assert(link);
111
112 if (!socket_ipv6_is_supported())
113 return false;
114
b102cdca 115 if (link->network->bond)
2b00a4e0
TY		 116 return false;
117
500b96eb 118 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 119 return false;
120
4cef7fe3 121 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 122 if (link_ipv6ll_enabled(link))
123 return true;
124
125 if (network_has_static_ipv6_configurations(link->network))
126 return true;
127
128 return false;
439689c6
SS		 129}
130
34bf3c00
YW		 131static bool link_is_enslaved(Link *link) {
132 if (link->flags & IFF_SLAVE)
133 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
134 return true;
135
34bf3c00
YW		 136 if (!link->network)
137 return false;
138
bb262ef0 139 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 140 return true;
141
bb262ef0
YW		 142 /* TODO: add conditions for other netdevs. */
143
34bf3c00
YW		 144 return false;
145}
146
45e11abf
YW		 147static void link_update_master_operstate(Link *link, NetDev *netdev) {
148 Link *master;
149
150 if (!netdev)
151 return;
152
7936917e
YW		 153 if (netdev->ifindex <= 0)
154 return;
155
45e11abf
YW		 156 if (link_get(link->manager, netdev->ifindex, &master) < 0)
157 return;
158
159 link_update_operstate(master, true);
160}
161
162void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 163 LinkOperationalState operstate;
1678fbb3
YW		 164 LinkCarrierState carrier_state;
165 LinkAddressState address_state;
35c5a9ca 166 _cleanup_strv_free_ char **p = NULL;
1678fbb3 167 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 168 bool changed = false;
1678fbb3 169 Address *address;
14153d1b 170
84de38c5
TG		 171 assert(link);
172
173 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 174 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 175 else if (link_has_carrier(link)) {
1678fbb3
YW		 176 if (link_is_enslaved(link))
177 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 178 else
1678fbb3 179 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 180 } else if (link->flags & IFF_UP)
1678fbb3 181 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 182 else
1678fbb3 183 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 184
1678fbb3 185 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 186 Link *slave;
187
90e74a66 188 SET_FOREACH(slave, link->slaves) {
959f65d3 189 link_update_operstate(slave, false);
84de38c5 190
1678fbb3
YW		 191 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
192 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 193 }
959f65d3 194 }
84de38c5 195
90e74a66 196 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 197 if (!address_is_ready(address))
198 continue;
84de38c5 199
1678fbb3
YW		 200 if (address->scope < scope)
201 scope = address->scope;
202 }
84de38c5 203
1678fbb3 204 /* for operstate we also take foreign addresses into account */
90e74a66 205 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 206 if (!address_is_ready(address))
207 continue;
208
209 if (address->scope < scope)
210 scope = address->scope;
211 }
212
213 if (scope < RT_SCOPE_SITE)
214 /* universally accessible addresses found */
215 address_state = LINK_ADDRESS_STATE_ROUTABLE;
216 else if (scope < RT_SCOPE_HOST)
217 /* only link or site local addresses found */
218 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 219 else
1678fbb3
YW		 220 /* no useful addresses found */
221 address_state = LINK_ADDRESS_STATE_OFF;
222
223 /* Mapping of address and carrier state vs operational state
224 * carrier state
225 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
226 * ------------------------------------------------------------------------------
227 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
228 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
229 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
230 */
84de38c5 231
1678fbb3
YW		 232 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
233 operstate = (LinkOperationalState) carrier_state;
234 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
235 operstate = LINK_OPERSTATE_ROUTABLE;
236 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
237 operstate = LINK_OPERSTATE_DEGRADED;
238 else
14153d1b
YW		 239 operstate = LINK_OPERSTATE_ENSLAVED;
240
35c5a9ca
YW		 241 if (link->carrier_state != carrier_state) {
242 link->carrier_state = carrier_state;
243 changed = true;
244 if (strv_extend(&p, "CarrierState") < 0)
245 log_oom();
246 }
959f65d3 247
35c5a9ca
YW		 248 if (link->address_state != address_state) {
249 link->address_state = address_state;
250 changed = true;
251 if (strv_extend(&p, "AddressState") < 0)
252 log_oom();
959f65d3
YW		 253 }
254
84de38c5
TG		 255 if (link->operstate != operstate) {
256 link->operstate = operstate;
35c5a9ca
YW		 257 changed = true;
258 if (strv_extend(&p, "OperationalState") < 0)
259 log_oom();
84de38c5 260 }
959f65d3 261
35c5a9ca
YW		 262 if (p)
263 link_send_changed_strv(link, p);
264 if (changed)
265 link_dirty(link);
266
45e11abf
YW		 267 if (also_update_master && link->network) {
268 link_update_master_operstate(link, link->network->bond);
269 link_update_master_operstate(link, link->network->bridge);
959f65d3 270 }
84de38c5
TG		 271}
272
51d18171
TG		 273#define FLAG_STRING(string, flag, old, new) \
274 (((old ^ new) & flag) \
275 ? ((old & flag) ? (" -" string) : (" +" string)) \
276 : "")
277
bb262ef0 278static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 279 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
280 uint8_t operstate;
281 int r;
282
283 assert(link);
284
285 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 286 if (r < 0)
287 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 288
1c4baffc 289 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 290 if (r < 0)
291 /* if we got a message without operstate, take it to mean
292 the state was unchanged */
293 operstate = link->kernel_operstate;
294
bb262ef0 295 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 296 return 0;
297
298 if (link->flags != flags) {
6a7a4e4d 299 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 300 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
301 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
302 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
303 FLAG_STRING("UP", IFF_UP, link->flags, flags),
304 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
305 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
306 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
307 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
308 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
309 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
310 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
311 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
312 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
313 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
314 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
315 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
316 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
317 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
318 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
319
320 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
321 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
322 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
323 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
324 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
325 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
326 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
327 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
328
329 /* link flags are currently at most 18 bits, let's align to
330 * printing 20 */
331 if (unknown_flags_added)
79008bdd 332 log_link_debug(link,
6a7a4e4d 333 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 334 unknown_flags_added);
335
336 if (unknown_flags_removed)
79008bdd 337 log_link_debug(link,
6a7a4e4d 338 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 339 unknown_flags_removed);
340 }
341
342 link->flags = flags;
343 link->kernel_operstate = operstate;
344
959f65d3 345 link_update_operstate(link, true);
51d18171
TG		 346
347 return 0;
348}
349
1c4baffc 350static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 351 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 352 const char *ifname, *kind = NULL;
b710e6b6 353 unsigned short iftype;
572b21d9
YW		 354 int r, ifindex;
355 uint16_t type;
f579559b 356
0c2f9b84 357 assert(manager);
505f8da7 358 assert(message);
f579559b
TG		 359 assert(ret);
360
6cad256d
TJ		 361 /* check for link kind */
362 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
363 if (r == 0) {
db2f8a2e 364 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 365 r = sd_netlink_message_exit_container(message);
366 if (r < 0)
367 return r;
368 }
369
1c4baffc 370 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 371 if (r < 0)
372 return r;
373 else if (type != RTM_NEWLINK)
374 return -EINVAL;
375
376 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
377 if (r < 0)
378 return r;
379 else if (ifindex <= 0)
380 return -EINVAL;
381
b710e6b6
LP		 382 r = sd_rtnl_message_link_get_type(message, &iftype);
383 if (r < 0)
384 return r;
385
1c4baffc 386 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 387 if (r < 0)
388 return r;
389
17f9c355 390 link = new(Link, 1);
f579559b
TG		 391 if (!link)
392 return -ENOMEM;
393
17f9c355
YW		 394 *link = (Link) {
395 .n_ref = 1,
396 .manager = manager,
397 .state = LINK_STATE_PENDING,
17f9c355
YW		 398 .ifindex = ifindex,
399 .iftype = iftype,
15761549
YW		 400
401 .n_dns = (unsigned) -1,
402 .dns_default_route = -1,
403 .llmnr = _RESOLVE_SUPPORT_INVALID,
404 .mdns = _RESOLVE_SUPPORT_INVALID,
405 .dnssec_mode = _DNSSEC_MODE_INVALID,
406 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 407 };
408
505f8da7
TG		 409 link->ifname = strdup(ifname);
410 if (!link->ifname)
411 return -ENOMEM;
f579559b 412
6cad256d
TJ		 413 if (kind) {
414 link->kind = strdup(kind);
415 if (!link->kind)
416 return -ENOMEM;
417 }
418
cbff7170
TJ		 419 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
420 if (r < 0)
421 log_link_debug_errno(link, r, "New device has no master, continuing without");
422
b8162cd2 423 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 424 if (r < 0)
b8162cd2 425 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 426
14b66dbc
TR		 427 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
428 if (r < 0)
429 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
430
c643bda5 431 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 432 if (r < 0)
433 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
434
c643bda5
YW		 435 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
436 if (r < 0)
437 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
438
572b21d9
YW		 439 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
440 if (r < 0 && r != -ENODATA)
441 return r;
442
34437b4f 443 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 444 return -ENOMEM;
fe8db0c5 445
34437b4f 446 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 447 return -ENOMEM;
448
34437b4f 449 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 450 return -ENOMEM;
451
d5099efc 452 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 453 if (r < 0)
454 return r;
455
456 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 457 if (r < 0)
458 return r;
459
bb262ef0 460 r = link_update_flags(link, message, false);
51d18171
TG		 461 if (r < 0)
462 return r;
463
1cc6c93a 464 *ret = TAKE_PTR(link);
f579559b
TG		 465
466 return 0;
467}
468
15761549
YW		 469void link_ntp_settings_clear(Link *link) {
470 link->ntp = strv_free(link->ntp);
471}
472
473void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 474 if (link->n_dns != (unsigned) -1)
475 for (unsigned i = 0; i < link->n_dns; i++)
476 in_addr_full_free(link->dns[i]);
15761549
YW		 477 link->dns = mfree(link->dns);
478 link->n_dns = (unsigned) -1;
479
480 link->search_domains = ordered_set_free_free(link->search_domains);
481 link->route_domains = ordered_set_free_free(link->route_domains);
482
483 link->dns_default_route = -1;
484 link->llmnr = _RESOLVE_SUPPORT_INVALID;
485 link->mdns = _RESOLVE_SUPPORT_INVALID;
486 link->dnssec_mode = _DNSSEC_MODE_INVALID;
487 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
488
489 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
490}
491
1a6bb31f
YW		 492static void link_free_engines(Link *link) {
493 if (!link)
494 return;
495
496 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
497 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
498 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 499 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 500
501 link->lldp = sd_lldp_unref(link->lldp);
1c494872 502 link_lldp_emit_stop(link);
1a6bb31f
YW		 503
504 ndisc_flush(link);
505
506 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
507 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 508 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 509 link->ndisc = sd_ndisc_unref(link->ndisc);
510 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 511
512 ipv4_dad_unref(link);
1a6bb31f
YW		 513}
514
8301aa0b 515static Link *link_free(Link *link) {
8301aa0b 516 assert(link);
f579559b 517
15761549
YW		 518 link_ntp_settings_clear(link);
519 link_dns_settings_clear(link);
520
8eec0b9d
YW		 521 link->routes = set_free(link->routes);
522 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 523 link->dhcp_routes = set_free(link->dhcp_routes);
524 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 525 link->dhcp6_routes = set_free(link->dhcp6_routes);
526 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
527 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
528 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 529 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 530
8eec0b9d
YW		 531 link->nexthops = set_free(link->nexthops);
532 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 533
8eec0b9d
YW		 534 link->neighbors = set_free(link->neighbors);
535 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 536
8eec0b9d
YW		 537 link->addresses = set_free(link->addresses);
538 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 539 link->pool_addresses = set_free(link->pool_addresses);
e5526518 540 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 541 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
542 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
543 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
544 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 545 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 546
1a6bb31f 547 link_free_engines(link);
68a8723c 548 free(link->lease_file);
49699bac
SS		 549 free(link->lldp_file);
550
c166a070 551 free(link->ifname);
572b21d9 552 strv_free(link->alternative_names);
ceac4078 553 free(link->kind);
8d968fdd 554 free(link->ssid);
c643bda5 555 free(link->driver);
6cad256d 556
db2f8a2e 557 (void) unlink(link->state_file);
fe8db0c5 558 free(link->state_file);
c166a070 559
51517f9e 560 sd_device_unref(link->sd_device);
b5db00e5 561
0d4ad91d 562 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 563 hashmap_free(link->bound_by_links);
564
5f707e12 565 set_free_with_destructor(link->slaves, link_unref);
033295c1 566
c9c908a6
YW		 567 network_unref(link->network);
568
8301aa0b 569 return mfree(link);
14b746f7
TG		 570}
571
8301aa0b 572DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 573
11a7f229
TG		 574int link_get(Manager *m, int ifindex, Link **ret) {
575 Link *link;
11a7f229
TG		 576
577 assert(m);
e856ed00 578 assert(ifindex > 0);
11a7f229
TG		 579 assert(ret);
580
ae06ab10 581 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 582 if (!link)
583 return -ENODEV;
584
585 *ret = link;
586
587 return 0;
588}
589
af9ba57a 590void link_set_state(Link *link, LinkState state) {
e331e246
TG		 591 assert(link);
592
593 if (link->state == state)
594 return;
595
0beb9542
YW		 596 log_link_debug(link, "State changed: %s -> %s",
597 link_state_to_string(link->state),
598 link_state_to_string(state));
599
e331e246
TG		 600 link->state = state;
601
602 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 603}
604
57bd6899
TG		 605static void link_enter_unmanaged(Link *link) {
606 assert(link);
607
e331e246 608 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 609
84de38c5 610 link_dirty(link);
57bd6899
TG		 611}
612
2a99eed0 613int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 614 int r = 0, k;
615
616 assert(link);
617 assert(link->manager);
618 assert(link->manager->event);
619
80060352
ZJS		 620 bool keep_dhcp = may_keep_dhcp &&
621 link->network &&
622 (link->manager->restarting ||
623 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
624
84add3cd 625 if (!keep_dhcp) {
111bb8f9 626 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 627 if (k < 0)
36c7d709 628 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 629 }
630
84add3cd
YW		 631 k = sd_ipv4acd_stop(link->dhcp_acd);
632 if (k < 0)
633 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 634
2a99eed0
YW		 635 k = sd_dhcp_server_stop(link->dhcp_server);
636 if (k < 0)
637 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
638
9cc65242
YW		 639 k = sd_lldp_stop(link->lldp);
640 if (k < 0)
641 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
642
84add3cd
YW		 643 k = sd_ipv4ll_stop(link->ipv4ll);
644 if (k < 0)
645 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 646
490ccbd5 647 k = ipv4_dad_stop(link);
2488e4d9
YW		 648 if (k < 0)
649 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 650
84add3cd
YW		 651 k = sd_dhcp6_client_stop(link->dhcp6_client);
652 if (k < 0)
653 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 654
2ffd6d73
YW		 655 k = dhcp6_pd_remove(link);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 658
84add3cd
YW		 659 k = sd_ndisc_stop(link->ndisc);
660 if (k < 0)
661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 662
84add3cd
YW		 663 k = sd_radv_stop(link->radv);
664 if (k < 0)
665 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 666
7272b25e 667 link_lldp_emit_stop(link);
111bb8f9
TG		 668 return r;
669}
670
b22d8a00 671void link_enter_failed(Link *link) {
ef1ba606 672 assert(link);
f882c247 673
370e9930 674 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 675 return;
676
6a7a4e4d 677 log_link_warning(link, "Failed");
449f7554 678
e331e246 679 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 680
2a99eed0 681 (void) link_stop_engines(link, false);
111bb8f9 682
84de38c5 683 link_dirty(link);
f882c247
TG		 684}
685
7033af49
YW		 686static int link_join_netdevs_after_configured(Link *link) {
687 NetDev *netdev;
7033af49
YW		 688 int r;
689
90e74a66 690 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 691 if (netdev->ifindex > 0)
692 /* Assume already enslaved. */
693 continue;
694
695 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
696 continue;
697
698 log_struct(LOG_DEBUG,
699 LOG_LINK_INTERFACE(link),
700 LOG_NETDEV_INTERFACE(netdev),
701 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
702
703 r = netdev_join(netdev, link, NULL);
704 if (r < 0)
705 return log_struct_errno(LOG_WARNING, r,
706 LOG_LINK_INTERFACE(link),
707 LOG_NETDEV_INTERFACE(netdev),
708 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
709 }
710
711 return 0;
712}
713
e3a7b048 714static void link_enter_configured(Link *link) {
dd43110f
TG		 715 assert(link);
716 assert(link->network);
e3a7b048 717
289e6774 718 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 719 return;
dd43110f 720
e331e246 721 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 722
7033af49
YW		 723 (void) link_join_netdevs_after_configured(link);
724
84de38c5 725 link_dirty(link);
dd43110f
TG		 726}
727
6accfd31
DA		 728void link_check_ready(Link *link) {
729 Address *a;
6accfd31
DA		 730
731 assert(link);
732
5f58af25
YW		 733 if (link->state == LINK_STATE_CONFIGURED)
734 return;
735
d19b9939
YW		 736 if (link->state != LINK_STATE_CONFIGURING)
737 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 738
739 if (!link->network)
740 return;
741
d19b9939
YW		 742 if (!link->addresses_configured)
743 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 744
d19b9939
YW		 745 if (!link->neighbors_configured)
746 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 747
90e74a66 748 SET_FOREACH(a, link->addresses)
39373cb9
YW		 749 if (!address_is_ready(a)) {
750 _cleanup_free_ char *str = NULL;
751
752 (void) in_addr_to_string(a->family, &a->in_addr, &str);
d19b9939 753 return (void) log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
39373cb9 754 }
6aa5773b 755
d19b9939
YW		 756 if (!link->static_routes_configured)
757 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 758
d19b9939
YW		 759 if (!link->static_nexthops_configured)
760 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 761
d19b9939
YW		 762 if (!link->routing_policy_rules_configured)
763 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 764
d19b9939
YW		 765 if (!link->tc_configured)
766 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 767
d19b9939
YW		 768 if (!link->sr_iov_configured)
769 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 770
d19b9939
YW		 771 if (!link->bridge_mdb_configured)
772 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 773
463797c1 774 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 775 bool has_ndisc_address = false;
776 NDiscAddress *n;
6accfd31 777
463797c1 778 if (link_ipv6ll_enabled(link) &&
d19b9939
YW		 779 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
780 return (void) log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
6accfd31 781
90e74a66 782 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 783 if (!n->marked) {
784 has_ndisc_address = true;
785 break;
786 }
787
0d0799da 788 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 789 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 790 !link->ipv4ll_address_configured)
791 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
792 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 793
0d0799da
YW		 794 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
795 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 796 if (!link->dhcp4_configured &&
797 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
798 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 799 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 800 !link->ipv4ll_address_configured)
801 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 802 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 803
0d0799da 804 log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 805 __func__,
806 yes_no(link->dhcp4_configured),
0d0799da 807 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 808 yes_no(link->dhcp6_address_configured),
809 yes_no(link->dhcp6_route_configured),
810 yes_no(link->dhcp6_pd_address_configured),
811 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 812 yes_no(link->ndisc_addresses_configured),
813 yes_no(link->ndisc_routes_configured));
39373cb9 814 }
463797c1 815 }
6accfd31 816
5f58af25 817 link_enter_configured(link);
6accfd31
DA		 818}
819
682c65b0 820static int link_set_static_configs(Link *link) {
f882c247
TG		 821 int r;
822
823 assert(link);
824 assert(link->network);
f5be5601 825 assert(link->state != _LINK_STATE_INVALID);
f882c247 826
2428613f 827 /* Reset all *_configured flags we are configuring. */
9b966cee 828 link->request_static_addresses = false;
2428613f 829 link->addresses_configured = false;
6aa5773b 830 link->addresses_ready = false;
2428613f
YW		 831 link->neighbors_configured = false;
832 link->static_routes_configured = false;
c16c7808 833 link->static_nexthops_configured = false;
2428613f
YW		 834 link->routing_policy_rules_configured = false;
835
f6bb7ac5
TJ		 836 r = link_set_bridge_fdb(link);
837 if (r < 0)
838 return r;
839
1f241589
YW		 840 r = link_set_bridge_mdb(link);
841 if (r < 0)
842 return r;
843
58f1fe9a 844 r = link_set_neighbors(link);
f3ef324d
YW		 845 if (r < 0)
846 return r;
e4a71bf3 847
682c65b0
YW		 848 r = link_set_addresses(link);
849 if (r < 0)
850 return r;
bd6379ec 851
fe2bc17c
YW		 852 r = link_set_address_labels(link);
853 if (r < 0)
854 return r;
f882c247 855
e5526518 856 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 857 r = dhcp4_server_configure(link);
858 if (r < 0)
859 return r;
d4cdbea5 860
f882c247
TG		 861 return 0;
862}
863
3a390124 864static int link_configure_continue(Link *link);
55dc8c4a 865
e16e4b3b
DS		 866static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
867 int r;
868
869 assert(link);
870
871 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
872 return 1;
873
874 r = sd_netlink_message_get_errno(m);
875 if (r < 0)
876 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
877 else
878 log_link_debug(link, "Setting MAC address done.");
879
880 return 1;
881}
882
883static int link_set_mac(Link *link) {
884 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
885 int r;
886
887 assert(link);
888 assert(link->network);
889 assert(link->manager);
890 assert(link->manager->rtnl);
891
892 if (!link->network->mac)
893 return 0;
894
895 log_link_debug(link, "Setting MAC address");
896
897 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
898 if (r < 0)
899 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
900
901 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
902 if (r < 0)
903 return log_link_error_errno(link, r, "Could not set MAC address: %m");
904
905 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
906 link_netlink_destroy_callback, link);
907 if (r < 0)
908 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
909
910 link_ref(link);
911
912 return 0;
913}
914
915static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
916 int r;
917
918 assert(link);
919
920 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
921 return 1;
922
923 r = sd_netlink_message_get_errno(m);
924 if (r < 0)
925 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
926 else
927 log_link_debug(link, "Setting nomaster done.");
928
929 return 1;
930}
931
932static int link_set_nomaster(Link *link) {
933 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
934 int r;
935
936 assert(link);
937 assert(link->network);
938 assert(link->manager);
939 assert(link->manager->rtnl);
940
941 /* set it free if not enslaved with networkd */
942 if (link->network->bridge || link->network->bond || link->network->vrf)
943 return 0;
944
945 log_link_debug(link, "Setting nomaster");
946
947 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
948 if (r < 0)
949 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
950
951 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
952 if (r < 0)
953 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
954
955 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
956 link_netlink_destroy_callback, link);
957 if (r < 0)
958 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
959
960 link_ref(link);
961
962 return 0;
963}
964
302a796f 965static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 966 int r;
967
968 assert(m);
969 assert(link);
970 assert(link->ifname);
971
55dc8c4a
YW		 972 link->setting_mtu = false;
973
5da8149f 974 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 975 return 1;
976
1c4baffc 977 r = sd_netlink_message_get_errno(m);
4ff296b0 978 if (r < 0)
5ecb131d 979 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 980 else
981 log_link_debug(link, "Setting MTU done.");
55dc8c4a 982
4ff296b0 983 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 984 r = link_configure_continue(link);
4ff296b0
YW		 985 if (r < 0)
986 link_enter_failed(link);
987 }
4f882b2a
TG		 988
989 return 1;
990}
991
933c70a0 992int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 993 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 994 int r;
995
996 assert(link);
997 assert(link->manager);
998 assert(link->manager->rtnl);
999
40288ece
YW		 1000 if (mtu == 0 || link->setting_mtu)
1001 return 0;
1002
933c70a0 1003 if (link->mtu == mtu)
ee493106
YW		 1004 return 0;
1005
6a7a4e4d 1006 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1007
6a7a4e4d
LP		 1008 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1009 if (r < 0)
1010 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1011
44b598a1 1012 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1013 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1014 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1015
1016 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1017 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1018
72c2500b 1019 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1020 }
1021
1c4baffc 1022 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1023 if (r < 0)
1024 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1025
302a796f
YW		 1026 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1027 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1028 if (r < 0)
1029 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1030
ae941762 1031 link_ref(link);
1046bf9b 1032 link->setting_mtu = true;
b226d99b 1033
4f882b2a
TG		 1034 return 0;
1035}
1036
f6fcc1c2
YW		 1037static bool link_reduces_vlan_mtu(Link *link) {
1038 /* See netif_reduces_vlan_mtu() in kernel. */
1039 return streq_ptr(link->kind, "macsec");
1040}
1041
1042static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1043 uint32_t mtu = 0;
1044 NetDev *dev;
f6fcc1c2 1045
90e74a66 1046 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1047 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1048 /* See vlan_dev_change_mtu() in kernel. */
1049 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1050
1051 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1052 /* See macvlan_change_mtu() in kernel. */
1053 mtu = dev->mtu;
1054
1055 return mtu;
1056}
1057
1058static int link_configure_mtu(Link *link) {
1059 uint32_t mtu;
1060
1061 assert(link);
1062 assert(link->network);
1063
1064 if (link->network->mtu > 0)
1065 return link_set_mtu(link, link->network->mtu);
1066
1067 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1068 if (link->mtu >= mtu)
1069 return 0;
1070
1071 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1072 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1073 link->mtu, mtu);
1074
1075 return link_set_mtu(link, mtu);
1076}
1077
302a796f 1078static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1079 int r;
1080
1081 assert(m);
1082 assert(link);
1083 assert(link->ifname);
1084
1085 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1086 return 1;
1087
1088 r = sd_netlink_message_get_errno(m);
1089 if (r < 0)
5ecb131d 1090 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1091
1092 return 1;
1093}
1094
1095static int link_set_flags(Link *link) {
1096 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1097 unsigned ifi_change = 0;
1098 unsigned ifi_flags = 0;
1099 int r;
1100
1101 assert(link);
1102 assert(link->manager);
1103 assert(link->manager->rtnl);
1104
1105 if (link->flags & IFF_LOOPBACK)
1106 return 0;
1107
1108 if (!link->network)
1109 return 0;
1110
937e305e
SS		 1111 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1112 link->network->promiscuous < 0)
99d2baa2
SS		 1113 return 0;
1114
1115 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1116 if (r < 0)
1117 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1118
1119 if (link->network->arp >= 0) {
1120 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1121 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1122 }
1123
1124 if (link->network->multicast >= 0) {
1125 ifi_change |= IFF_MULTICAST;
1126 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1127 }
1128
866e6b7a
SS		 1129 if (link->network->allmulticast >= 0) {
1130 ifi_change |= IFF_ALLMULTI;
1131 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1132 }
1133
937e305e
SS		 1134 if (link->network->promiscuous >= 0) {
1135 ifi_change |= IFF_PROMISC;
1136 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1137 }
1138
99d2baa2
SS		 1139 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1140 if (r < 0)
1141 return log_link_error_errno(link, r, "Could not set link flags: %m");
1142
302a796f
YW		 1143 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1144 link_netlink_destroy_callback, link);
99d2baa2
SS		 1145 if (r < 0)
1146 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1147
1148 link_ref(link);
1149
1150 return 0;
1151}
1152
e7ab854c
TG		 1153static int link_acquire_ipv6_conf(Link *link) {
1154 int r;
1155
1156 assert(link);
1157
2ffd6d73 1158 if (link->ndisc) {
e7ab854c
TG		 1159 log_link_debug(link, "Discovering IPv6 routers");
1160
1e7a0e21 1161 r = sd_ndisc_start(link->ndisc);
63348d13 1162 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1163 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1164 }
1165
086b8853 1166 if (link->radv) {
7465dd22
PF		 1167 assert(link->radv);
1168 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1169
1170 log_link_debug(link, "Starting IPv6 Router Advertisements");
1171
fd3ef936
YW		 1172 r = radv_emit_dns(link);
1173 if (r < 0)
1174 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1175
7465dd22
PF		 1176 r = sd_radv_start(link->radv);
1177 if (r < 0 && r != -EBUSY)
1178 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1179 }
1180
838d39af
SS		 1181 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1182 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1183 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1184 assert(link->dhcp6_client);
1185 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1186
838d39af 1187 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1188 if (r < 0 && r != -EBUSY)
1633c457 1189 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1190 else
1191 log_link_debug(link, "Acquiring DHCPv6 lease");
1192 }
1193
1633c457
YW		 1194 r = dhcp6_request_prefix_delegation(link);
1195 if (r < 0)
1196 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1197
e7ab854c
TG		 1198 return 0;
1199}
1200
6fc25497 1201static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1202 int r;
1203
1204 assert(link);
ff254138
TG		 1205 assert(link->manager);
1206 assert(link->manager->event);
1207
0107b769
ZJS		 1208 if (link->dhcp_client) {
1209 log_link_debug(link, "Acquiring DHCPv4 lease");
1210
1211 r = sd_dhcp_client_start(link->dhcp_client);
1212 if (r < 0)
1213 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1214
0b4b66cc 1215 } else if (link->ipv4ll) {
6a7a4e4d 1216 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1217
1218 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1219 if (r < 0)
1220 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1221 }
1222
6fc25497
SS		 1223 return 0;
1224}
1225
1226static int link_acquire_conf(Link *link) {
1227 int r;
1228
1229 assert(link);
1230
1231 r = link_acquire_ipv4_conf(link);
1232 if (r < 0)
1233 return r;
1234
3f7cc080 1235 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1236 r = link_acquire_ipv6_conf(link);
1237 if (r < 0)
1238 return r;
1239 }
1240
2ffd6d73
YW		 1241 r = link_lldp_emit_start(link);
1242 if (r < 0)
1243 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1244
ff254138
TG		 1245 return 0;
1246}
1247
a61bb41c 1248bool link_has_carrier(Link *link) {
deb2e523
TG		 1249 /* see Documentation/networking/operstates.txt in the kernel sources */
1250
a61bb41c 1251 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1252 return true;
1253
a61bb41c 1254 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1255 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1256 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1257 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1258 return true;
1259
1260 return false;
1261}
1262
0e2fdb83
SS		 1263static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1264 int r;
1265
1266 assert(link);
1267
9524014e
DS		 1268 link->setting_genmode = false;
1269
0e2fdb83
SS		 1270 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1271 return 1;
1272
1273 r = sd_netlink_message_get_errno(m);
1274 if (r < 0)
5ecb131d 1275 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1276 else
1277 log_link_debug(link, "Setting address genmode done.");
1278
1279 if (link->state == LINK_STATE_INITIALIZED) {
1280 r = link_configure_continue(link);
1281 if (r < 0)
1282 link_enter_failed(link);
1283 }
0e2fdb83
SS		 1284
1285 return 1;
1286}
1287
1288static int link_configure_addrgen_mode(Link *link) {
1289 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1290 uint8_t ipv6ll_mode;
1291 int r;
1292
1293 assert(link);
1294 assert(link->network);
1295 assert(link->manager);
1296 assert(link->manager->rtnl);
1297
9524014e 1298 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1299 return 0;
1300
0e2fdb83
SS		 1301 log_link_debug(link, "Setting address genmode for link");
1302
1303 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1304 if (r < 0)
1305 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1306
1307 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1308 if (r < 0)
1309 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1310
1311 r = sd_netlink_message_open_container(req, AF_INET6);
1312 if (r < 0)
1313 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1314
1315 if (!link_ipv6ll_enabled(link))
1316 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1317 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1318 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1319 if (r < 0) {
1320 /* The file may not exist. And even if it exists, when stable_secret is unset,
1321 * reading the file fails with EIO. */
1322 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1323
1324 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1325 } else
1326 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1327 } else
6f6296b9 1328 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1329
1330 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1333
1334 r = sd_netlink_message_close_container(req);
1335 if (r < 0)
1336 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1337
1338 r = sd_netlink_message_close_container(req);
1339 if (r < 0)
1340 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1341
1342 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1343 link_netlink_destroy_callback, link);
1344 if (r < 0)
1345 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1346
1347 link_ref(link);
9524014e 1348 link->setting_genmode = true;
0e2fdb83
SS		 1349
1350 return 0;
1351}
1352
302a796f 1353static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1354 int r;
1355
1746cf2a
TG		 1356 assert(link);
1357
5da8149f 1358 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1359 return 1;
1360
1c4baffc 1361 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1362 if (r < 0)
26d6b214 1363 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1364 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1365
f882c247
TG		 1366 return 1;
1367}
1368
1cc84f3b 1369static int link_up(Link *link) {
4afd3348 1370 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1371 int r;
1372
f882c247 1373 assert(link);
c106cc36 1374 assert(link->network);
f882c247
TG		 1375 assert(link->manager);
1376 assert(link->manager->rtnl);
1377
6a7a4e4d 1378 log_link_debug(link, "Bringing link up");
449f7554 1379
6a7a4e4d
LP		 1380 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1383
5d4795f3 1384 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1385 if (r < 0)
1386 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1387
302a796f
YW		 1388 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1389 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1390 if (r < 0)
1391 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1392
b226d99b
TG		 1393 link_ref(link);
1394
f882c247
TG		 1395 return 0;
1396}
1397
302a796f 1398static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1399 int r;
1400
1401 assert(link);
1402
1403 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1404 return 1;
1405
1c4baffc 1406 r = sd_netlink_message_get_errno(m);
0d4ad91d 1407 if (r < 0)
5ecb131d 1408 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1409
1410 return 1;
1411}
1412
8e54db83 1413int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1414 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1415 int r;
1416
1417 assert(link);
1418 assert(link->manager);
1419 assert(link->manager->rtnl);
1420
6a7a4e4d 1421 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1422
1423 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1424 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1427
1428 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1431
8e54db83
YW		 1432 r = netlink_call_async(link->manager->rtnl, NULL, req,
1433 callback ?: link_down_handler,
302a796f 1434 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1435 if (r < 0)
1436 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1437
1438 link_ref(link);
1439
1440 return 0;
1441}
1442
89fe6535
SS		 1443static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1444 int r;
1445
1446 assert(link);
1447
1448 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1449 return 1;
1450
1451 r = sd_netlink_message_get_errno(m);
1452 if (r < 0)
1453 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1454
1455 return 1;
1456}
1457
1458static int link_set_group(Link *link) {
1459 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1460 int r;
1461
1462 assert(link);
1463 assert(link->network);
1464 assert(link->manager);
1465 assert(link->manager->rtnl);
1466
1467 if (link->network->group <= 0)
1468 return 0;
1469
1470 log_link_debug(link, "Setting group");
1471
1472 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1475
1476 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1477 if (r < 0)
1478 return log_link_error_errno(link, r, "Could not set link group: %m");
1479
1480 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1481 link_netlink_destroy_callback, link);
1482 if (r < 0)
1483 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1484
1485 link_ref(link);
1486
1487 return 0;
1488}
1489
0a9fb9ba
SS		 1490static int link_tx_rx_queues_hadler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1491 int r;
1492
1493 assert(link);
1494
1495 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1496 return 1;
1497
1498 r = sd_netlink_message_get_errno(m);
1499 if (r < 0)
1500 log_link_message_warning_errno(link, m, r, "Could not set transmit / receive queues for the interface");
1501
1502 return 1;
1503}
1504
1505static int link_set_tx_rx_queues(Link *link) {
1506 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1507 int r;
1508
1509 assert(link);
1510 assert(link->network);
1511 assert(link->manager);
1512 assert(link->manager->rtnl);
1513
1514 if (link->network->txqueues == 0 && link->network->rxqueues == 0)
1515 return 0;
1516
1517 log_link_debug(link, "Setting transmit / receive queues");
1518
1519 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1520 if (r < 0)
1521 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1522
1523 if (link->network->txqueues > 0) {
1524 r = sd_netlink_message_append_u32(req, IFLA_NUM_TX_QUEUES, link->network->txqueues);
1525 if (r < 0)
1526 return log_link_error_errno(link, r, "Could not set link transmit queues: %m");
1527 }
1528
1529 if (link->network->rxqueues > 0) {
1530 r = sd_netlink_message_append_u32(req, IFLA_NUM_RX_QUEUES, link->network->rxqueues);
1531 if (r < 0)
1532 return log_link_error_errno(link, r, "Could not set link receive queues: %m");
1533 }
1534
1535 r = netlink_call_async(link->manager->rtnl, NULL, req, link_tx_rx_queues_hadler,
1536 link_netlink_destroy_callback, link);
1537 if (r < 0)
1538 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1539
1540 link_ref(link);
1541
1542 return 0;
1543}
1544
0d4ad91d
AR		 1545static int link_handle_bound_to_list(Link *link) {
1546 Link *l;
0d4ad91d
AR		 1547 int r;
1548 bool required_up = false;
1549 bool link_is_up = false;
1550
1551 assert(link);
1552
1553 if (hashmap_isempty(link->bound_to_links))
1554 return 0;
1555
1556 if (link->flags & IFF_UP)
1557 link_is_up = true;
1558
90e74a66 1559 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1560 if (link_has_carrier(l)) {
1561 required_up = true;
1562 break;
1563 }
1564
1565 if (!required_up && link_is_up) {
8e54db83 1566 r = link_down(link, NULL);
0d4ad91d
AR		 1567 if (r < 0)
1568 return r;
1569 } else if (required_up && !link_is_up) {
1570 r = link_up(link);
1571 if (r < 0)
1572 return r;
1573 }
1574
1575 return 0;
1576}
1577
1578static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1579 Link *l;
1580 int r;
1581
1582 assert(link);
1583
1584 if (hashmap_isempty(link->bound_by_links))
1585 return 0;
1586
90e74a66 1587 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1588 r = link_handle_bound_to_list(l);
1589 if (r < 0)
1590 return r;
1591 }
1592
1593 return 0;
1594}
1595
1596static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1597 int r;
1598
1599 assert(link);
1600 assert(carrier);
1601
1602 if (link == carrier)
1603 return 0;
1604
1605 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1606 return 0;
1607
1608 r = hashmap_ensure_allocated(h, NULL);
1609 if (r < 0)
1610 return r;
1611
1612 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1613 if (r < 0)
1614 return r;
1615
1616 return 0;
1617}
1618
1619static int link_new_bound_by_list(Link *link) {
1620 Manager *m;
1621 Link *carrier;
0d4ad91d
AR		 1622 int r;
1623 bool list_updated = false;
1624
1625 assert(link);
1626 assert(link->manager);
1627
1628 m = link->manager;
1629
90e74a66 1630 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1631 if (!carrier->network)
1632 continue;
1633
1634 if (strv_isempty(carrier->network->bind_carrier))
1635 continue;
1636
191a3f16 1637 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1638 r = link_put_carrier(link, carrier, &link->bound_by_links);
1639 if (r < 0)
1640 return r;
1641
1642 list_updated = true;
1643 }
1644 }
1645
1646 if (list_updated)
84de38c5 1647 link_dirty(link);
0d4ad91d 1648
90e74a66 1649 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1650 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1651 if (r < 0)
1652 return r;
1653
84de38c5 1654 link_dirty(carrier);
0d4ad91d
AR		 1655 }
1656
1657 return 0;
1658}
1659
1660static int link_new_bound_to_list(Link *link) {
1661 Manager *m;
1662 Link *carrier;
0d4ad91d
AR		 1663 int r;
1664 bool list_updated = false;
1665
1666 assert(link);
1667 assert(link->manager);
1668
1669 if (!link->network)
1670 return 0;
1671
1672 if (strv_isempty(link->network->bind_carrier))
1673 return 0;
1674
1675 m = link->manager;
1676
90e74a66 1677 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1678 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1679 r = link_put_carrier(link, carrier, &link->bound_to_links);
1680 if (r < 0)
1681 return r;
1682
1683 list_updated = true;
1684 }
1685 }
1686
1687 if (list_updated)
84de38c5 1688 link_dirty(link);
0d4ad91d 1689
90e74a66 1690 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1691 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1692 if (r < 0)
1693 return r;
1694
84de38c5 1695 link_dirty(carrier);
0d4ad91d
AR		 1696 }
1697
1698 return 0;
1699}
1700
1701static int link_new_carrier_maps(Link *link) {
1702 int r;
1703
1704 r = link_new_bound_by_list(link);
1705 if (r < 0)
1706 return r;
1707
1708 r = link_handle_bound_by_list(link);
1709 if (r < 0)
1710 return r;
1711
1712 r = link_new_bound_to_list(link);
1713 if (r < 0)
1714 return r;
1715
1716 r = link_handle_bound_to_list(link);
1717 if (r < 0)
1718 return r;
1719
1720 return 0;
1721}
1722
1723static void link_free_bound_to_list(Link *link) {
1724 Link *bound_to;
0d4ad91d 1725
90e74a66 1726 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1727 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1728
1729 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1730 link_dirty(bound_to);
0d4ad91d
AR		 1731 }
1732
1733 return;
1734}
1735
1736static void link_free_bound_by_list(Link *link) {
1737 Link *bound_by;
0d4ad91d 1738
90e74a66 1739 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1740 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1741
1742 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1743 link_dirty(bound_by);
0d4ad91d
AR		 1744 link_handle_bound_to_list(bound_by);
1745 }
1746 }
1747
1748 return;
1749}
1750
1751static void link_free_carrier_maps(Link *link) {
1752 bool list_updated = false;
1753
1754 assert(link);
1755
1756 if (!hashmap_isempty(link->bound_to_links)) {
1757 link_free_bound_to_list(link);
1758 list_updated = true;
1759 }
1760
1761 if (!hashmap_isempty(link->bound_by_links)) {
1762 link_free_bound_by_list(link);
1763 list_updated = true;
1764 }
1765
1766 if (list_updated)
84de38c5 1767 link_dirty(link);
0d4ad91d
AR		 1768
1769 return;
1770}
1771
5f707e12
YW		 1772static int link_append_to_master(Link *link, NetDev *netdev) {
1773 Link *master;
1774 int r;
1775
1776 assert(link);
1777 assert(netdev);
1778
1779 r = link_get(link->manager, netdev->ifindex, &master);
1780 if (r < 0)
1781 return r;
1782
de7fef4b 1783 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1784 if (r <= 0)
5f707e12
YW		 1785 return r;
1786
1787 link_ref(link);
1788 return 0;
1789}
1790
1791static void link_drop_from_master(Link *link, NetDev *netdev) {
1792 Link *master;
1793
1794 assert(link);
1795
1796 if (!link->manager || !netdev)
1797 return;
1798
1799 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1800 return;
1801
1802 link_unref(set_remove(master->slaves, link));
1803}
1804
1805static void link_detach_from_manager(Link *link) {
1806 if (!link || !link->manager)
1807 return;
1808
1809 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1810 link_clean(link);
1811
1812 /* The following must be called at last. */
1813 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1814 link_unref(link);
1815}
1816
0d4ad91d
AR		 1817void link_drop(Link *link) {
1818 if (!link || link->state == LINK_STATE_LINGER)
1819 return;
1820
1821 link_set_state(link, LINK_STATE_LINGER);
1822
1823 link_free_carrier_maps(link);
1824
5f707e12
YW		 1825 if (link->network) {
1826 link_drop_from_master(link, link->network->bridge);
1827 link_drop_from_master(link, link->network->bond);
1828 }
1829
6a7a4e4d 1830 log_link_debug(link, "Link removed");
0d4ad91d 1831
db2f8a2e 1832 (void) unlink(link->state_file);
c4397d94 1833 link_detach_from_manager(link);
0d4ad91d
AR		 1834}
1835
3f265037 1836static int link_joined(Link *link) {
f882c247
TG		 1837 int r;
1838
ef1ba606 1839 assert(link);
f5be5601 1840 assert(link->network);
dd3efc09 1841
0d4ad91d
AR		 1842 if (!hashmap_isempty(link->bound_to_links)) {
1843 r = link_handle_bound_to_list(link);
1844 if (r < 0)
1845 return r;
1846 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1847 r = link_up(link);
1848 if (r < 0) {
1849 link_enter_failed(link);
1850 return r;
1851 }
ef1ba606 1852 }
f882c247 1853
9ed794a3 1854 if (link->network->bridge) {
e1853b00 1855 r = link_set_bridge(link);
6a7a4e4d
LP		 1856 if (r < 0)
1857 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1858
1859 r = link_append_to_master(link, link->network->bridge);
1860 if (r < 0)
1861 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1862 }
1863
eb64b435 1864 if (link->network->bond) {
7fcee284 1865 r = link_set_bond(link);
eb64b435
SS		 1866 if (r < 0)
1867 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1868
45e11abf 1869 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1870 if (r < 0)
1871 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1872 }
1873
34d7f2c9
YW		 1874 r = link_set_bridge_vlan(link);
1875 if (r < 0)
1876 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1877
c1835a42
RM		 1878 /* Skip setting up addresses until it gets carrier,
1879 or it would try to set addresses twice,
1880 which is bad for non-idempotent steps. */
dad2d78e 1881 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1882 return 0;
1883
b425c3ae 1884 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1885
1886 r = link_acquire_conf(link);
1887 if (r < 0)
1888 return r;
1889
682c65b0 1890 return link_set_static_configs(link);
02b59d57
TG		 1891}
1892
302a796f 1893static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1894 int r;
1895
1746cf2a 1896 assert(link);
ef1ba606 1897 assert(link->network);
34bf3c00 1898 assert(link->enslaving > 0);
02b59d57 1899
313cefa1 1900 link->enslaving--;
52433f6b 1901
5da8149f 1902 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1903 return 1;
1904
1c4baffc 1905 r = sd_netlink_message_get_errno(m);
856f962c 1906 if (r < 0 && r != -EEXIST) {
5ecb131d 1907 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1908 link_enter_failed(link);
1909 return 1;
4ff296b0
YW		 1910 }
1911
1912 log_link_debug(link, "Joined netdev");
02b59d57 1913
34bf3c00 1914 if (link->enslaving == 0) {
4ff296b0
YW		 1915 r = link_joined(link);
1916 if (r < 0)
1917 link_enter_failed(link);
34bf3c00 1918 }
02b59d57
TG		 1919
1920 return 1;
1921}
1922
3f265037 1923static int link_enter_join_netdev(Link *link) {
6a0a2f86 1924 NetDev *netdev;
02b59d57
TG		 1925 int r;
1926
1927 assert(link);
1928 assert(link->network);
bd08ce56 1929 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1930
289e6774 1931 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1932
84de38c5 1933 link_dirty(link);
34bf3c00 1934 link->enslaving = 0;
02b59d57 1935
d9c67ea1 1936 if (link->network->bond) {
cbff7170
TJ		 1937 if (link->network->bond->state == NETDEV_STATE_READY &&
1938 link->network->bond->ifindex == link->master_ifindex)
1939 return link_joined(link);
1940
f2341e0a
LP		 1941 log_struct(LOG_DEBUG,
1942 LOG_LINK_INTERFACE(link),
1943 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1944 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1945
34bf3c00
YW		 1946 link->enslaving++;
1947
f2341e0a 1948 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1949 if (r < 0) {
f2341e0a
LP		 1950 log_struct_errno(LOG_WARNING, r,
1951 LOG_LINK_INTERFACE(link),
1952 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1953 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1954 link_enter_failed(link);
1955 return r;
1956 }
0ad6148e
MO		 1957 }
1958
d9c67ea1 1959 if (link->network->bridge) {
f2341e0a
LP		 1960 log_struct(LOG_DEBUG,
1961 LOG_LINK_INTERFACE(link),
1962 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1963 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1964
34bf3c00
YW		 1965 link->enslaving++;
1966
f2341e0a 1967 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1968 if (r < 0) {
f2341e0a
LP		 1969 log_struct_errno(LOG_WARNING, r,
1970 LOG_LINK_INTERFACE(link),
1971 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1972 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1973 link_enter_failed(link);
1974 return r;
1975 }
52433f6b
TG		 1976 }
1977
6cb955c6
AR		 1978 if (link->network->vrf) {
1979 log_struct(LOG_DEBUG,
1980 LOG_LINK_INTERFACE(link),
1981 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1982 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1983
34bf3c00
YW		 1984 link->enslaving++;
1985
6cb955c6
AR		 1986 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1987 if (r < 0) {
1988 log_struct_errno(LOG_WARNING, r,
1989 LOG_LINK_INTERFACE(link),
1990 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1991 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1992 link_enter_failed(link);
1993 return r;
1994 }
6cb955c6
AR		 1995 }
1996
90e74a66 1997 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1998
2b6db913
YW		 1999 if (netdev->ifindex > 0)
2000 /* Assume already enslaved. */
a63e5daa 2001 continue;
a63e5daa 2002
7033af49
YW		 2003 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2004 continue;
2005
f2341e0a
LP		 2006 log_struct(LOG_DEBUG,
2007 LOG_LINK_INTERFACE(link),
2008 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2009 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2010
34bf3c00
YW		 2011 link->enslaving++;
2012
f2341e0a 2013 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2014 if (r < 0) {
f2341e0a
LP		 2015 log_struct_errno(LOG_WARNING, r,
2016 LOG_LINK_INTERFACE(link),
2017 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2018 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2019 link_enter_failed(link);
2020 return r;
2021 }
326cb406
SS		 2022 }
2023
34bf3c00
YW		 2024 if (link->enslaving == 0)
2025 return link_joined(link);
2026
ef1ba606
TG		 2027 return 0;
2028}
2029
5e5b137a 2030static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2031 int k, r;
2032
2033 assert(link);
2034 assert(link->manager);
5e5b137a 2035
f8f2f880 2036 r = link_drop_foreign_addresses(link);
5e5b137a 2037
0b81225e
YW		 2038 k = link_drop_foreign_neighbors(link);
2039 if (k < 0 && r >= 0)
2040 r = k;
2041
2042 k = link_drop_foreign_routes(link);
2043 if (k < 0 && r >= 0)
2044 r = k;
d1bdafd2 2045
0b81225e
YW		 2046 k = manager_drop_foreign_routing_policy_rules(link->manager);
2047 if (k < 0 && r >= 0)
2048 r = k;
2049
2050 return r;
5e5b137a
TG		 2051}
2052
3104883d 2053static int link_drop_config(Link *link) {
0b81225e
YW		 2054 int k, r;
2055
2056 assert(link);
2057 assert(link->manager);
3104883d 2058
d7fbb9f5 2059 r = link_drop_addresses(link);
3104883d 2060
0b81225e
YW		 2061 k = link_drop_neighbors(link);
2062 if (k < 0 && r >= 0)
2063 r = k;
d1bdafd2 2064
0b81225e
YW		 2065 k = link_drop_routes(link);
2066 if (k < 0 && r >= 0)
2067 r = k;
2068
2069 k = manager_drop_routing_policy_rules(link->manager, link);
2070 if (k < 0 && r >= 0)
2071 r = k;
3104883d 2072
c69305ff
LP		 2073 ndisc_flush(link);
2074
0b81225e 2075 return r;
3104883d
SS		 2076}
2077
256c75fd 2078int link_configure(Link *link) {
4ecdcb07
YW		 2079 int r;
2080
ef1ba606 2081 assert(link);
b22d8a00 2082 assert(link->network);
bd08ce56 2083 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2084
34658df2 2085 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2086 if (r < 0)
2087 return r;
2088
518cd6b5
SS		 2089 r = link_configure_sr_iov(link);
2090 if (r < 0)
2091 return r;
2092
500b96eb 2093 if (link->iftype == ARPHRD_CAN)
93ea7750 2094 return link_configure_can(link);
92c918b0 2095
5e0534f1 2096 r = link_set_sysctl(link);
b69c3180
SS		 2097 if (r < 0)
2098 return r;
8749cbcd 2099
5e0534f1 2100 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 2101 if (r < 0)
2102 return r;
2103
e16e4b3b
DS		 2104 r = link_set_mac(link);
2105 if (r < 0)
2106 return r;
2107
2108 r = link_set_nomaster(link);
2109 if (r < 0)
2110 return r;
2111
99d2baa2
SS		 2112 r = link_set_flags(link);
2113 if (r < 0)
2114 return r;
2115
89fe6535
SS		 2116 r = link_set_group(link);
2117 if (r < 0)
2118 return r;
2119
0a9fb9ba
SS		 2120 r = link_set_tx_rx_queues(link);
2121 if (r < 0)
2122 return r;
2123
2ffd6d73
YW		 2124 r = ipv4ll_configure(link);
2125 if (r < 0)
2126 return r;
64b21ece 2127
2ffd6d73
YW		 2128 r = dhcp4_configure(link);
2129 if (r < 0)
2130 return r;
eb34d4af 2131
2ffd6d73
YW		 2132 r = dhcp6_configure(link);
2133 if (r < 0)
2134 return r;
f5a8c43f 2135
2ffd6d73
YW		 2136 r = ndisc_configure(link);
2137 if (r < 0)
2138 return r;
4138fb2c 2139
086b8853
YW		 2140 r = radv_configure(link);
2141 if (r < 0)
2142 return r;
7465dd22 2143
2ffd6d73
YW		 2144 r = link_lldp_rx_configure(link);
2145 if (r < 0)
2146 return r;
ce43e484 2147
f6fcc1c2 2148 r = link_configure_mtu(link);
40288ece
YW		 2149 if (r < 0)
2150 return r;
44b598a1 2151
9f6e82e6
YW		 2152 r = link_configure_addrgen_mode(link);
2153 if (r < 0)
2154 return r;
0e2fdb83 2155
3a390124
DS		 2156 return link_configure_continue(link);
2157}
2158
2159/* The configuration continues in this separate function, instead of
2160 * including this in the above link_configure() function, for two
2161 * reasons:
2162 * 1) some devices reset the link when the mtu is set, which caused
2163 * an infinite loop here in networkd; see:
2164 * https://github.com/systemd/systemd/issues/6593
2165 * https://github.com/systemd/systemd/issues/9831
2166 * 2) if ipv6ll is disabled, then bringing the interface up must be
2167 * delayed until after we get confirmation from the kernel that
2168 * the addr_gen_mode parameter has been set (via netlink), see:
2169 * https://github.com/systemd/systemd/issues/13882
2170 */
2171static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2172 int r;
2173
2174 assert(link);
2175 assert(link->network);
bd08ce56 2176 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2177
9524014e 2178 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2179 return 0;
2180
4c649652
DS		 2181 /* Drop foreign config, but ignore loopback or critical devices.
2182 * We do not want to remove loopback address or addresses used for root NFS. */
2183 if (!(link->flags & IFF_LOOPBACK) &&
2184 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2185 r = link_drop_foreign_config(link);
2186 if (r < 0)
2187 return r;
2188 }
2189
d236718c
DS		 2190 /* The kernel resets ipv6 mtu after changing device mtu;
2191 * we must set this here, after we've set device mtu */
2192 r = link_set_ipv6_mtu(link);
2193 if (r < 0)
5e0534f1 2194 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2195
3f265037 2196 return link_enter_join_netdev(link);
505f8da7
TG		 2197}
2198
572b21d9 2199static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2200 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2201 Network *network;
2202 int r;
2203
8bceafa7 2204 assert(m);
572b21d9 2205
8bceafa7
YW		 2206 r = sd_netlink_message_get_errno(m);
2207 if (r < 0)
2208 return r;
572b21d9 2209
8bceafa7
YW		 2210 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2211 if (r < 0 && r != -ENODATA)
2212 return r;
572b21d9 2213
8bceafa7 2214 strv_free_and_replace(link->alternative_names, s);
572b21d9 2215
c643bda5
YW		 2216 r = network_get(link->manager, link->iftype, link->sd_device,
2217 link->ifname, link->alternative_names, link->driver,
b8162cd2 2218 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2219 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2220 if (r == -ENOENT) {
2221 link_enter_unmanaged(link);
2222 return 0;
2223 } else if (r == 0 && network->unmanaged) {
2224 link_enter_unmanaged(link);
2225 return 0;
2226 } else if (r < 0)
2227 return r;
2228
99b8517c 2229 if (link->network == network && !force)
ad932b15
YW		 2230 return 0;
2231
2232 log_link_info(link, "Re-configuring with %s", network->filename);
2233
2234 /* Dropping old .network file */
2a99eed0 2235 r = link_stop_engines(link, false);
572b21d9 2236 if (r < 0)
ad932b15 2237 return r;
ad932b15 2238
ad932b15
YW		 2239 r = link_drop_config(link);
2240 if (r < 0)
2241 return r;
2242
2c7b826d 2243 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2244 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2245 r = link_drop_foreign_config(link);
2246 if (r < 0)
2247 return r;
2248 }
2249
2250 link_free_carrier_maps(link);
2251 link_free_engines(link);
2252 link->network = network_unref(link->network);
59c31eba 2253 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2254
2255 /* Then, apply new .network file */
2256 r = network_apply(network, link);
2257 if (r < 0)
2258 return r;
2259
2260 r = link_new_carrier_maps(link);
2261 if (r < 0)
2262 return r;
2263
2264 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2265 link_dirty(link);
ad932b15
YW		 2266
2267 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2268 * link_configure() is called later asynchronously. */
2269 r = link_configure_duid(link);
2270 if (r <= 0)
2271 return r;
2272
2273 r = link_configure(link);
2274 if (r < 0)
2275 return r;
2276
2277 return 0;
2278}
2279
572b21d9
YW		 2280static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2281 int r;
2282
2283 r = link_reconfigure_internal(link, m, false);
2284 if (r < 0)
2285 link_enter_failed(link);
2286
2287 return 1;
2288}
2289
2290static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2291 int r;
2292
2293 r = link_reconfigure_internal(link, m, true);
2294 if (r < 0)
2295 link_enter_failed(link);
2296
2297 return 1;
2298}
2299
2300int link_reconfigure(Link *link, bool force) {
2301 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2302 int r;
2303
8bceafa7 2304 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2305 * the function from being called multiple times simultaneously, refuse to reconfigure the
2306 * interface in these cases. */
8bceafa7 2307 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2308 return 0; /* 0 means no-op. */
2c0d7ed3 2309
572b21d9
YW		 2310 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2311 link->ifindex);
2312 if (r < 0)
2313 return r;
2314
2315 r = netlink_call_async(link->manager->rtnl, NULL, req,
2316 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2317 link_netlink_destroy_callback, link);
2318 if (r < 0)
2319 return r;
2320
2321 link_ref(link);
2322
8bceafa7 2323 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2324}
2325
e6bf7774 2326static int link_initialized_and_synced(Link *link) {
505f8da7 2327 Network *network;
505f8da7
TG		 2328 int r;
2329
2330 assert(link);
2331 assert(link->ifname);
2332 assert(link->manager);
2333
bd08ce56
YW		 2334 /* We may get called either from the asynchronous netlink callback,
2335 * or directly for link_add() if running in a container. See link_add(). */
2336 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2337 return 0;
505f8da7 2338
6a7a4e4d 2339 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2340 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2341
0d4ad91d
AR		 2342 r = link_new_bound_by_list(link);
2343 if (r < 0)
2344 return r;
2345
2346 r = link_handle_bound_by_list(link);
2347 if (r < 0)
2348 return r;
2349
c4a03a56 2350 if (!link->network) {
0894cfe4 2351 r = wifi_get_info(link);
8d968fdd
YW		 2352 if (r < 0)
2353 return r;
2354
c643bda5
YW		 2355 r = network_get(link->manager, link->iftype, link->sd_device,
2356 link->ifname, link->alternative_names, link->driver,
b8162cd2 2357 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2358 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2359 if (r == -ENOENT) {
2360 link_enter_unmanaged(link);
4232cf04 2361 return 0;
a09dc546
DM		 2362 } else if (r == 0 && network->unmanaged) {
2363 link_enter_unmanaged(link);
2364 return 0;
c4a03a56
TG		 2365 } else if (r < 0)
2366 return r;
505f8da7 2367
c4a03a56
TG		 2368 if (link->flags & IFF_LOOPBACK) {
2369 if (network->link_local != ADDRESS_FAMILY_NO)
2370 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2371
c4a03a56
TG		 2372 if (network->dhcp != ADDRESS_FAMILY_NO)
2373 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2374
c4a03a56
TG		 2375 if (network->dhcp_server)
2376 log_link_debug(link, "Ignoring DHCP server for loopback link");
2377 }
bd2efe92 2378
7d342c03 2379 r = network_apply(network, link);
c4a03a56
TG		 2380 if (r < 0)
2381 return r;
2382 }
505f8da7 2383
0d4ad91d
AR		 2384 r = link_new_bound_to_list(link);
2385 if (r < 0)
2386 return r;
2387
27dfc982
YW		 2388 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2389 * link_configure() is called later asynchronously. */
2390 r = link_configure_duid(link);
2391 if (r <= 0)
2392 return r;
2393
a748b692
TG		 2394 r = link_configure(link);
2395 if (r < 0)
2396 return r;
2397
4232cf04 2398 return 0;
505f8da7
TG		 2399}
2400
302a796f 2401static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2402 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2403 int r;
2404
572b21d9
YW		 2405 r = sd_netlink_message_get_errno(m);
2406 if (r < 0) {
40681e5c 2407 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2408 link_enter_failed(link);
2409 return 0;
2410 }
2411
2412 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2413 if (r < 0 && r != -ENODATA) {
2414 link_enter_failed(link);
2415 return 0;
2416 }
2417
2418 strv_free_and_replace(link->alternative_names, s);
2419
4ff296b0
YW		 2420 r = link_initialized_and_synced(link);
2421 if (r < 0)
2422 link_enter_failed(link);
e6bf7774
YW		 2423 return 1;
2424}
2425
51517f9e 2426int link_initialized(Link *link, sd_device *device) {
4afd3348 2427 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2428 int r;
2429
2430 assert(link);
2431 assert(link->manager);
2432 assert(link->manager->rtnl);
2433 assert(device);
2434
8434fd5c 2435 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2436 return 0;
2437
51517f9e 2438 if (link->sd_device)
679b3605
TG		 2439 return 0;
2440
79008bdd 2441 log_link_debug(link, "udev initialized link");
bd08ce56 2442 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2443
51517f9e 2444 link->sd_device = sd_device_ref(device);
4f561e8e 2445
3c9b8860
TG		 2446 /* udev has initialized the link, but we don't know if we have yet
2447 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2448 * when it returns we know that the pending NEWLINKs have already been
2449 * processed and that we are up-to-date */
4f561e8e 2450
3c9b8860
TG		 2451 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2452 link->ifindex);
4f561e8e
TG		 2453 if (r < 0)
2454 return r;
2455
302a796f
YW		 2456 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2457 link_netlink_destroy_callback, link);
4f561e8e
TG		 2458 if (r < 0)
2459 return r;
2460
5da8149f
TG		 2461 link_ref(link);
2462
4f561e8e
TG		 2463 return 0;
2464}
2465
1c4baffc 2466int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2467 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2468 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2469 Link *link;
5a937ea2 2470 int r;
505f8da7
TG		 2471
2472 assert(m);
fbbeb65a 2473 assert(m->rtnl);
505f8da7
TG		 2474 assert(message);
2475 assert(ret);
2476
2477 r = link_new(m, message, ret);
2478 if (r < 0)
2479 return r;
2480
2481 link = *ret;
2482
6a7a4e4d 2483 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2484
bf331d87
YW		 2485 if (path_is_read_only_fs("/sys") <= 0) {
2486 /* udev should be around */
ae06ab10 2487 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2488 r = sd_device_new_from_device_id(&device, ifindex_str);
2489 if (r < 0) {
4d59e14f
YW		 2490 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2491 return 0;
5c416fc4 2492 }
505f8da7 2493
5a937ea2 2494 r = sd_device_get_is_initialized(device);
51517f9e 2495 if (r < 0) {
bf331d87 2496 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2497 goto failed;
2498 }
5a937ea2 2499 if (r == 0) {
505f8da7 2500 /* not yet ready */
79008bdd 2501 log_link_debug(link, "link pending udev initialization...");
505f8da7 2502 return 0;
3c4cb064 2503 }
505f8da7 2504
299ad32d
YW		 2505 r = device_is_renaming(device);
2506 if (r < 0) {
bf331d87 2507 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2508 goto failed;
2509 }
2510 if (r > 0) {
bf331d87 2511 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2512 return 0;
2513 }
2514
4f561e8e
TG		 2515 r = link_initialized(link, device);
2516 if (r < 0)
5c416fc4 2517 goto failed;
4f561e8e 2518 } else {
e6bf7774 2519 r = link_initialized_and_synced(link);
4f561e8e 2520 if (r < 0)
5c416fc4 2521 goto failed;
4f561e8e 2522 }
505f8da7 2523
a748b692 2524 return 0;
5c416fc4
TG		 2525failed:
2526 link_enter_failed(link);
2527 return r;
a748b692
TG		 2528}
2529
c601ebf7 2530int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2531 int r;
2532
2533 assert(link);
2534
2535 log_link_info(link, "Gained IPv6LL");
2536
c601ebf7 2537 link->ipv6ll_address = *address;
e7ab854c
TG		 2538 link_check_ready(link);
2539
b9ea3d2e 2540 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2541 r = link_acquire_ipv6_conf(link);
2542 if (r < 0) {
2543 link_enter_failed(link);
2544 return r;
2545 }
2546 }
2547
2548 return 0;
2549}
2550
9c0a72f9
TG		 2551static int link_carrier_gained(Link *link) {
2552 int r;
2553
2554 assert(link);
2555
0894cfe4 2556 r = wifi_get_info(link);
8d968fdd
YW		 2557 if (r < 0)
2558 return r;
2559 if (r > 0) {
8bceafa7 2560 r = link_reconfigure(link, false);
572b21d9
YW		 2561 if (r < 0) {
2562 link_enter_failed(link);
8d968fdd 2563 return r;
572b21d9 2564 }
8d968fdd
YW		 2565 }
2566
b9ea3d2e 2567 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2568 r = link_acquire_conf(link);
2569 if (r < 0) {
2570 link_enter_failed(link);
2571 return r;
2572 }
6fc25497 2573
b425c3ae 2574 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2575 r = link_set_static_configs(link);
6fc25497
SS		 2576 if (r < 0)
2577 return r;
9c0a72f9
TG		 2578 }
2579
0d4ad91d
AR		 2580 r = link_handle_bound_by_list(link);
2581 if (r < 0)
2582 return r;
2583
1f241589
YW		 2584 if (!link->bridge_mdb_configured) {
2585 r = link_set_bridge_mdb(link);
2586 if (r < 0)
2587 return r;
2588 }
2589
2590 if (streq_ptr(link->kind, "bridge")) {
2591 Link *slave;
2592
2593 SET_FOREACH(slave, link->slaves) {
2594 if (slave->bridge_mdb_configured)
2595 continue;
2596
2597 r = link_set_bridge_mdb(slave);
2598 if (r < 0)
2599 link_enter_failed(slave);
2600 }
2601 }
3db468ea 2602
9c0a72f9
TG		 2603 return 0;
2604}
2605
2606static int link_carrier_lost(Link *link) {
2607 int r;
2608
2609 assert(link);
2610
25e992ba 2611 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2612 return 0;
2613
fbdb6605 2614 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2615 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2616 * configuration and stop the clients as well. */
97e7fb39
SS		 2617 if (link->setting_mtu)
2618 return 0;
2619
2a99eed0 2620 r = link_stop_engines(link, false);
9c0a72f9
TG		 2621 if (r < 0) {
2622 link_enter_failed(link);
2623 return r;
2624 }
2625
3104883d
SS		 2626 r = link_drop_config(link);
2627 if (r < 0)
2628 return r;
2629
2c7b826d 2630 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2631 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2632 r = link_drop_foreign_config(link);
2633 if (r < 0)
2634 return r;
2635 }
3104883d 2636
0d4ad91d
AR		 2637 r = link_handle_bound_by_list(link);
2638 if (r < 0)
2639 return r;
2640
9c0a72f9
TG		 2641 return 0;
2642}
2643
2644int link_carrier_reset(Link *link) {
2645 int r;
2646
2647 assert(link);
2648
2649 if (link_has_carrier(link)) {
2650 r = link_carrier_lost(link);
2651 if (r < 0)
2652 return r;
2653
2654 r = link_carrier_gained(link);
2655 if (r < 0)
2656 return r;
2657
6a7a4e4d 2658 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2659 }
2660
2661 return 0;
2662}
2663
d236718c
DS		 2664/* This is called every time an interface admin state changes to up;
2665 * specifically, when IFF_UP flag changes from unset to set */
2666static int link_admin_state_up(Link *link) {
2667 int r;
2668
2669 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2670 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2671 * ipv6_mtu_set prevents this from trying to set it too early before
2672 * the link->network has been setup; we only need to reset it
2673 * here if we've already set it during normal initialization. */
2674 if (link->ipv6_mtu_set) {
2675 r = link_set_ipv6_mtu(link);
2676 if (r < 0)
2677 return r;
2678 }
2679
2680 return 0;
2681}
2682
1c4baffc 2683int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2684 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2685 hw_addr_data hw_addr;
ca4e095a 2686 const char *ifname;
afe7fd56 2687 uint32_t mtu;
d236718c 2688 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2689 int old_master, r;
22936833 2690
dd3efc09 2691 assert(link);
b8941f74 2692 assert(link->ifname);
22936833
TG		 2693 assert(m);
2694
7619683b 2695 if (link->state == LINK_STATE_LINGER) {
5238e957 2696 log_link_info(link, "Link re-added");
289e6774 2697 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2698
2699 r = link_new_carrier_maps(link);
2700 if (r < 0)
2701 return r;
7619683b
TG		 2702 }
2703
1c4baffc 2704 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2705 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2706 Manager *manager = link->manager;
b8941f74 2707
30de2b89 2708 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2709
30de2b89
YW		 2710 link_drop(link);
2711 r = link_add(manager, m, &link);
2712 if (r < 0)
2713 return r;
b8941f74
TG		 2714 }
2715
572b21d9
YW		 2716 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2717 if (r >= 0)
2718 strv_free_and_replace(link->alternative_names, s);
2719
1c4baffc 2720 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2721 if (r >= 0 && mtu > 0) {
2722 link->mtu = mtu;
4e964aa0 2723 if (link->original_mtu == 0) {
afe7fd56 2724 link->original_mtu = mtu;
6a7a4e4d 2725 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2726 }
2727
2728 if (link->dhcp_client) {
3c9b8860
TG		 2729 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2730 link->mtu);
fc95c359
YW		 2731 if (r < 0)
2732 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2733 }
7465dd22
PF		 2734
2735 if (link->radv) {
2736 r = sd_radv_set_mtu(link->radv, link->mtu);
2737 if (r < 0)
2738 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2739 }
9842de0d 2740 }
69629de9 2741
e9189a1f
TG		 2742 /* The kernel may broadcast NEWLINK messages without the MAC address
2743 set, simply ignore them. */
b8162cd2
TR		 2744 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2745 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2746 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2747
b8162cd2 2748 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2749
b8162cd2 2750 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2751
a3adb4a6
YW		 2752 r = ipv4ll_update_mac(link);
2753 if (r < 0)
2754 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2755
d947f7f9
YW		 2756 r = dhcp4_update_mac(link);
2757 if (r < 0)
2758 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2759
eebba6dc
YW		 2760 r = dhcp6_update_mac(link);
2761 if (r < 0)
2762 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2763
d0c4275c 2764 r = radv_update_mac(link);
be9363cc
YW		 2765 if (r < 0)
2766 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2767
2768 if (link->ndisc) {
b8162cd2 2769 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2770 if (r < 0)
2771 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2772 }
d93d655c
YW		 2773
2774 r = ipv4_dad_update_mac(link);
2775 if (r < 0)
2776 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2777 }
2778
bb262ef0
YW		 2779 old_master = link->master_ifindex;
2780 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2781
d236718c 2782 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2783 had_carrier = link_has_carrier(link);
2784
bb262ef0 2785 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2786 if (r < 0)
2787 return r;
2788
d236718c
DS		 2789 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2790 log_link_info(link, "Link UP");
2791
2792 r = link_admin_state_up(link);
2793 if (r < 0)
2794 return r;
2795 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2796 log_link_info(link, "Link DOWN");
2797
273eec24
LP		 2798 r = link_update_lldp(link);
2799 if (r < 0)
2800 return r;
2801
a61bb41c
TG		 2802 carrier_gained = !had_carrier && link_has_carrier(link);
2803 carrier_lost = had_carrier && !link_has_carrier(link);
2804
2805 if (carrier_gained) {
6a7a4e4d 2806 log_link_info(link, "Gained carrier");
a61bb41c 2807
9c0a72f9
TG		 2808 r = link_carrier_gained(link);
2809 if (r < 0)
2810 return r;
a61bb41c 2811 } else if (carrier_lost) {
6a7a4e4d 2812 log_link_info(link, "Lost carrier");
a61bb41c 2813
9c0a72f9
TG		 2814 r = link_carrier_lost(link);
2815 if (r < 0)
a61bb41c 2816 return r;
a61bb41c
TG		 2817 }
2818
2819 return 0;
dd3efc09 2820}
fe8db0c5 2821
b295beea
LP		 2822static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2823 bool space = false;
b295beea
LP		 2824 Link *link;
2825
2826 assert(f);
2827 assert(prefix);
2828
2829 if (hashmap_isempty(h))
2830 return;
2831
0d536673 2832 fputs(prefix, f);
90e74a66 2833 HASHMAP_FOREACH(link, h) {
b295beea 2834 if (space)
0d536673 2835 fputc(' ', f);
b295beea
LP		 2836
2837 fprintf(f, "%i", link->ifindex);
2838 space = true;
2839 }
2840
0d536673 2841 fputc('\n', f);
b295beea
LP		 2842}
2843
64581765 2844static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2845 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2846 const char *str;
15761549 2847
64581765
YW		 2848 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2849 continue;
2850
e77bd3fd
YW		 2851 str = in_addr_full_to_string(dns[j]);
2852 if (!str)
15761549 2853 continue;
15761549
YW		 2854
2855 if (*space)
2856 fputc(' ', f);
e77bd3fd 2857 fputs(str, f);
15761549
YW		 2858 *space = true;
2859 }
2860}
2861
d5e172d2
ZJS		 2862static void serialize_addresses(
2863 FILE *f,
2864 const char *lvalue,
2865 bool *space,
2866 char **addresses,
2867 sd_dhcp_lease *lease,
2868 bool conditional,
ddb82ec2 2869 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2870 sd_dhcp6_lease *lease6,
2871 bool conditional6,
2872 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2873 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2874 int r;
2875
2876 bool _space = false;
2877 if (!space)
2878 space = &_space;
2879
2880 if (lvalue)
2881 fprintf(f, "%s=", lvalue);
2882 fputstrv(f, addresses, NULL, space);
2883
2884 if (lease && conditional) {
2885 const struct in_addr *lease_addresses;
2886
2887 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2888 if (r > 0)
d8bff5cc 2889 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2890 }
2891
2892 if (lease6 && conditional6 && lease6_get_addr) {
2893 const struct in6_addr *in6_addrs;
2894
2895 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2896 if (r > 0)
2897 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2898 }
2899
2900 if (lease6 && conditional6 && lease6_get_fqdn) {
2901 char **in6_hosts;
2902
2903 r = lease6_get_fqdn(lease6, &in6_hosts);
2904 if (r > 0)
2905 fputstrv(f, in6_hosts, NULL, space);
2906 }
2907
2908 if (lvalue)
2909 fputc('\n', f);
2910}
2911
fe8db0c5 2912int link_save(Link *link) {
d361b373 2913 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2914 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2915 _cleanup_fclose_ FILE *f = NULL;
2916 int r;
2917
2918 assert(link);
2919 assert(link->state_file);
68a8723c 2920 assert(link->lease_file);
bbf7c048
TG		 2921 assert(link->manager);
2922
370e9930 2923 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2924 (void) unlink(link->state_file);
370e9930
TG		 2925 return 0;
2926 }
2927
34437b4f
LP		 2928 link_lldp_save(link);
2929
deb2e523
TG		 2930 admin_state = link_state_to_string(link->state);
2931 assert(admin_state);
2932
e375dcde
TG		 2933 oper_state = link_operstate_to_string(link->operstate);
2934 assert(oper_state);
deb2e523 2935
ac999bf0
YW		 2936 carrier_state = link_carrier_state_to_string(link->carrier_state);
2937 assert(carrier_state);
2938
2939 address_state = link_address_state_to_string(link->address_state);
2940 assert(address_state);
2941
fe8db0c5
TG		 2942 r = fopen_temporary(link->state_file, &f, &temp_path);
2943 if (r < 0)
6a7a4e4d 2944 goto fail;
fe8db0c5 2945
5512a963 2946 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2947
2948 fprintf(f,
2949 "# This is private data. Do not parse.\n"
deb2e523 2950 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2951 "OPER_STATE=%s\n"
2952 "CARRIER_STATE=%s\n"
2953 "ADDRESS_STATE=%s\n",
2954 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2955
bcb7a07e 2956 if (link->network) {
fe0e16db
YW		 2957 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2958 const char *dhcp_domainname = NULL, *p;
fe0e16db 2959 bool space;
07bdc70d 2960
c1a38904
MTL		 2961 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2962 yes_no(link->network->required_for_online));
2963
d5e172d2
ZJS		 2964 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2965 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2966 strempty(link_operstate_to_string(st.min)),
2967 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2968 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2969
adc5b2e2
TG		 2970 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2971
d5e172d2
ZJS		 2972 /************************************************************/
2973
0d536673 2974 fputs("DNS=", f);
ea352b40 2975 space = false;
15761549 2976 if (link->n_dns != (unsigned) -1)
64581765 2977 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2978 else
64581765 2979 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2980
d5e172d2
ZJS		 2981 serialize_addresses(f, NULL, &space,
2982 NULL,
2983 link->dhcp_lease,
2984 link->network->dhcp_use_dns,
ddb82ec2 2985 SD_DHCP_LEASE_DNS,
1633c457 2986 link->dhcp6_lease,
d5e172d2
ZJS		 2987 link->network->dhcp6_use_dns,
2988 sd_dhcp6_lease_get_dns,
2989 NULL);
1e7a0e21 2990
a8c10331 2991 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2992 ndisc_vacuum(link);
2993
b296797f 2994 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2995 NDiscRDNSS *dd;
2996
90e74a66 2997 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2998 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2999 }
3000
3001 fputc('\n', f);
3002
d5e172d2
ZJS		 3003 /************************************************************/
3004
3005 serialize_addresses(f, "NTP", NULL,
3006 link->ntp ?: link->network->ntp,
3007 link->dhcp_lease,
3008 link->network->dhcp_use_ntp,
ddb82ec2 3009 SD_DHCP_LEASE_NTP,
1633c457 3010 link->dhcp6_lease,
d5e172d2
ZJS		 3011 link->network->dhcp6_use_ntp,
3012 sd_dhcp6_lease_get_ntp_addrs,
3013 sd_dhcp6_lease_get_ntp_fqdn);
3014
3015 serialize_addresses(f, "SIP", NULL,
2a71d57f 3016 NULL,
d5e172d2
ZJS		 3017 link->dhcp_lease,
3018 link->network->dhcp_use_sip,
ddb82ec2 3019 SD_DHCP_LEASE_SIP,
2a71d57f 3020 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3021
3022 /************************************************************/
bd8f6538 3023
b2a81c0b 3024 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3025 if (link->dhcp_lease) {
b2a81c0b 3026 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3027 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3028 }
1633c457
YW		 3029 if (link->dhcp6_lease)
3030 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3031 }
3032
fe0e16db
YW		 3033 fputs("DOMAINS=", f);
3034 space = false;
90e74a66 3035 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3036 fputs_with_space(f, p, NULL, &space);
07bdc70d 3037
1e7a0e21 3038 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3039 if (dhcp_domainname)
3040 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3041 if (dhcp_domains)
3042 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3043 if (dhcp6_domains)
3044 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3045 }
3046
3047 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3048 NDiscDNSSL *dd;
1e7a0e21 3049
90e74a66 3050 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3051 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3052 }
b2a81c0b 3053
0d536673 3054 fputc('\n', f);
6192b846 3055
d5e172d2
ZJS		 3056 /************************************************************/
3057
fe0e16db
YW		 3058 fputs("ROUTE_DOMAINS=", f);
3059 space = false;
90e74a66 3060 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3061 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3062
1e7a0e21 3063 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3064 if (dhcp_domainname)
3065 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3066 if (dhcp_domains)
3067 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3068 if (dhcp6_domains)
3069 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3070 }
3071
3072 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3073 NDiscDNSSL *dd;
1e7a0e21 3074
90e74a66 3075 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3076 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3077 }
b2a81c0b 3078
0d536673 3079 fputc('\n', f);
67272d15 3080
d5e172d2
ZJS		 3081 /************************************************************/
3082
3c9b8860 3083 fprintf(f, "LLMNR=%s\n",
15761549 3084 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3085
3086 /************************************************************/
3087
aaa297d4 3088 fprintf(f, "MDNS=%s\n",
15761549 3089 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3090
d5e172d2
ZJS		 3091 /************************************************************/
3092
3093 int dns_default_route =
3094 link->dns_default_route >= 0 ? link->dns_default_route :
3095 link->network->dns_default_route;
3096 if (dns_default_route >= 0)
3097 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3098
3099 /************************************************************/
3100
3101 DnsOverTlsMode dns_over_tls_mode =
3102 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3103 link->network->dns_over_tls_mode;
3104 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3105 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3106
3107 /************************************************************/
3108
3109 DnssecMode dnssec_mode =
3110 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3111 link->network->dnssec_mode;
3112 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3113 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3114
3115 /************************************************************/
3116
3117 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3118 if (set_isempty(nta_anchors))
3119 nta_anchors = link->network->dnssec_negative_trust_anchors;
3120
3121 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3122 const char *n;
3123
0d536673 3124 fputs("DNSSEC_NTA=", f);
8a516214 3125 space = false;
90e74a66 3126 SET_FOREACH(n, nta_anchors)
d390f8ef 3127 fputs_with_space(f, n, NULL, &space);
0d536673 3128 fputc('\n', f);
8a516214 3129 }
bcb7a07e 3130 }
7374f9d8 3131
b295beea
LP		 3132 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3133 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3134
8eb9058d 3135 if (link->dhcp_lease) {
bd91b83e 3136 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3137 if (r < 0)
c2d6bd61 3138 goto fail;
fe8db0c5 3139
7374f9d8 3140 fprintf(f,
b0e39c82
TG		 3141 "DHCP_LEASE=%s\n",
3142 link->lease_file);
deb2e523 3143 } else
6990fb6b 3144 (void) unlink(link->lease_file);
fe8db0c5 3145
5460bde5
YW		 3146 r = link_serialize_dhcp6_client(link, f);
3147 if (r < 0)
3148 goto fail;
18d8a2cf 3149
c2d6bd61
LP		 3150 r = fflush_and_check(f);
3151 if (r < 0)
3152 goto fail;
fe8db0c5 3153
c2d6bd61 3154 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3155 r = -errno;
c2d6bd61 3156 goto fail;
fe8db0c5
TG		 3157 }
3158
c2d6bd61 3159 return 0;
dacd6cee 3160
c2d6bd61 3161fail:
6a7a4e4d 3162 (void) unlink(link->state_file);
6a7a4e4d
LP		 3163 if (temp_path)
3164 (void) unlink(temp_path);
3165
dacd6cee 3166 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3167}
3168
84de38c5
TG		 3169/* The serialized state in /run is no longer up-to-date. */
3170void link_dirty(Link *link) {
3171 int r;
3172
3173 assert(link);
3174
0c241a37
SS		 3175 /* mark manager dirty as link is dirty */
3176 manager_dirty(link->manager);
3177
de7fef4b 3178 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3179 if (r <= 0)
de7fef4b 3180 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3181 return;
84de38c5
TG		 3182 link_ref(link);
3183}
3184
3185/* The serialized state in /run is up-to-date */
3186void link_clean(Link *link) {
3187 assert(link);
3188 assert(link->manager);
3189
1046bf9b 3190 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3191}
3192
c2a65950
YW		 3193int link_save_and_clean(Link *link) {
3194 int r;
3195
3196 r = link_save(link);
3197 if (r < 0)
3198 return r;
3199
3200 link_clean(link);
3201 return 0;
3202}
3203
fe8db0c5 3204static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3205 [LINK_STATE_PENDING] = "pending",
bd08ce56 3206 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3207 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3208 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3209 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3210 [LINK_STATE_FAILED] = "failed",
370e9930 3211 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3212};
3213
3214DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3215
3216int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3217 const char *err_msg = NULL;
3218
3219 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3220 return log_link_full_errno(link, level, err,
3221 "%s: %s%s%s%m",
3222 msg,
3223 strempty(err_msg),
3224 err_msg && !endswith(err_msg, ".") ? "." : "",
3225 err_msg ? " " : "");
5ecb131d 3226}
Unnamed repository; edit this file 'description' to name the repository.