]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: link - use hashmap_ensure_put
[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
967d72ed 452 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 453 if (r < 0)
454 return r;
455
bb262ef0 456 r = link_update_flags(link, message, false);
51d18171
TG		 457 if (r < 0)
458 return r;
459
1cc6c93a 460 *ret = TAKE_PTR(link);
f579559b
TG		 461
462 return 0;
463}
464
15761549
YW		 465void link_ntp_settings_clear(Link *link) {
466 link->ntp = strv_free(link->ntp);
467}
468
469void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 470 if (link->n_dns != (unsigned) -1)
471 for (unsigned i = 0; i < link->n_dns; i++)
472 in_addr_full_free(link->dns[i]);
15761549
YW		 473 link->dns = mfree(link->dns);
474 link->n_dns = (unsigned) -1;
475
476 link->search_domains = ordered_set_free_free(link->search_domains);
477 link->route_domains = ordered_set_free_free(link->route_domains);
478
479 link->dns_default_route = -1;
480 link->llmnr = _RESOLVE_SUPPORT_INVALID;
481 link->mdns = _RESOLVE_SUPPORT_INVALID;
482 link->dnssec_mode = _DNSSEC_MODE_INVALID;
483 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
484
485 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
486}
487
1a6bb31f
YW		 488static void link_free_engines(Link *link) {
489 if (!link)
490 return;
491
492 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
493 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
494 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 495 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 496
497 link->lldp = sd_lldp_unref(link->lldp);
1c494872 498 link_lldp_emit_stop(link);
1a6bb31f
YW		 499
500 ndisc_flush(link);
501
502 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
503 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 504 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 505 link->ndisc = sd_ndisc_unref(link->ndisc);
506 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 507
508 ipv4_dad_unref(link);
1a6bb31f
YW		 509}
510
8301aa0b 511static Link *link_free(Link *link) {
8301aa0b 512 assert(link);
f579559b 513
15761549
YW		 514 link_ntp_settings_clear(link);
515 link_dns_settings_clear(link);
516
8eec0b9d
YW		 517 link->routes = set_free(link->routes);
518 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 519 link->dhcp_routes = set_free(link->dhcp_routes);
520 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 521 link->dhcp6_routes = set_free(link->dhcp6_routes);
522 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
523 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
524 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 525 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 526
8eec0b9d
YW		 527 link->nexthops = set_free(link->nexthops);
528 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 529
8eec0b9d
YW		 530 link->neighbors = set_free(link->neighbors);
531 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 532
8eec0b9d
YW		 533 link->addresses = set_free(link->addresses);
534 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 535 link->pool_addresses = set_free(link->pool_addresses);
e5526518 536 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 537 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
538 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
539 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
540 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 541 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 542
1a6bb31f 543 link_free_engines(link);
68a8723c 544 free(link->lease_file);
49699bac
SS		 545 free(link->lldp_file);
546
c166a070 547 free(link->ifname);
572b21d9 548 strv_free(link->alternative_names);
ceac4078 549 free(link->kind);
8d968fdd 550 free(link->ssid);
c643bda5 551 free(link->driver);
6cad256d 552
db2f8a2e 553 (void) unlink(link->state_file);
fe8db0c5 554 free(link->state_file);
c166a070 555
51517f9e 556 sd_device_unref(link->sd_device);
b5db00e5 557
0d4ad91d 558 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 559 hashmap_free(link->bound_by_links);
560
5f707e12 561 set_free_with_destructor(link->slaves, link_unref);
033295c1 562
c9c908a6
YW		 563 network_unref(link->network);
564
8301aa0b 565 return mfree(link);
14b746f7
TG		 566}
567
8301aa0b 568DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 569
11a7f229
TG		 570int link_get(Manager *m, int ifindex, Link **ret) {
571 Link *link;
11a7f229
TG		 572
573 assert(m);
e856ed00 574 assert(ifindex > 0);
11a7f229
TG		 575 assert(ret);
576
ae06ab10 577 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 578 if (!link)
579 return -ENODEV;
580
581 *ret = link;
582
583 return 0;
584}
585
af9ba57a 586void link_set_state(Link *link, LinkState state) {
e331e246
TG		 587 assert(link);
588
589 if (link->state == state)
590 return;
591
0beb9542
YW		 592 log_link_debug(link, "State changed: %s -> %s",
593 link_state_to_string(link->state),
594 link_state_to_string(state));
595
e331e246
TG		 596 link->state = state;
597
598 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 599}
600
57bd6899
TG		 601static void link_enter_unmanaged(Link *link) {
602 assert(link);
603
e331e246 604 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 605
84de38c5 606 link_dirty(link);
57bd6899
TG		 607}
608
2a99eed0 609int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 610 int r = 0, k;
611
612 assert(link);
613 assert(link->manager);
614 assert(link->manager->event);
615
80060352
ZJS		 616 bool keep_dhcp = may_keep_dhcp &&
617 link->network &&
618 (link->manager->restarting ||
619 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
620
84add3cd 621 if (!keep_dhcp) {
111bb8f9 622 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 623 if (k < 0)
36c7d709 624 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 625 }
626
84add3cd
YW		 627 k = sd_ipv4acd_stop(link->dhcp_acd);
628 if (k < 0)
629 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 630
2a99eed0
YW		 631 k = sd_dhcp_server_stop(link->dhcp_server);
632 if (k < 0)
633 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
634
9cc65242
YW		 635 k = sd_lldp_stop(link->lldp);
636 if (k < 0)
637 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
638
84add3cd
YW		 639 k = sd_ipv4ll_stop(link->ipv4ll);
640 if (k < 0)
641 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 642
490ccbd5 643 k = ipv4_dad_stop(link);
2488e4d9
YW		 644 if (k < 0)
645 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 646
84add3cd
YW		 647 k = sd_dhcp6_client_stop(link->dhcp6_client);
648 if (k < 0)
649 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 650
2ffd6d73
YW		 651 k = dhcp6_pd_remove(link);
652 if (k < 0)
653 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 654
84add3cd
YW		 655 k = sd_ndisc_stop(link->ndisc);
656 if (k < 0)
657 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 658
84add3cd
YW		 659 k = sd_radv_stop(link->radv);
660 if (k < 0)
661 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 662
7272b25e 663 link_lldp_emit_stop(link);
111bb8f9
TG		 664 return r;
665}
666
b22d8a00 667void link_enter_failed(Link *link) {
ef1ba606 668 assert(link);
f882c247 669
370e9930 670 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 671 return;
672
6a7a4e4d 673 log_link_warning(link, "Failed");
449f7554 674
e331e246 675 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 676
2a99eed0 677 (void) link_stop_engines(link, false);
111bb8f9 678
84de38c5 679 link_dirty(link);
f882c247
TG		 680}
681
7033af49
YW		 682static int link_join_netdevs_after_configured(Link *link) {
683 NetDev *netdev;
7033af49
YW		 684 int r;
685
90e74a66 686 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 687 if (netdev->ifindex > 0)
688 /* Assume already enslaved. */
689 continue;
690
691 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
692 continue;
693
694 log_struct(LOG_DEBUG,
695 LOG_LINK_INTERFACE(link),
696 LOG_NETDEV_INTERFACE(netdev),
697 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
698
699 r = netdev_join(netdev, link, NULL);
700 if (r < 0)
701 return log_struct_errno(LOG_WARNING, r,
702 LOG_LINK_INTERFACE(link),
703 LOG_NETDEV_INTERFACE(netdev),
704 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
705 }
706
707 return 0;
708}
709
e3a7b048 710static void link_enter_configured(Link *link) {
dd43110f
TG		 711 assert(link);
712 assert(link->network);
e3a7b048 713
289e6774 714 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 715 return;
dd43110f 716
e331e246 717 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 718
7033af49
YW		 719 (void) link_join_netdevs_after_configured(link);
720
84de38c5 721 link_dirty(link);
dd43110f
TG		 722}
723
6accfd31
DA		 724void link_check_ready(Link *link) {
725 Address *a;
6accfd31
DA		 726
727 assert(link);
728
5f58af25
YW		 729 if (link->state == LINK_STATE_CONFIGURED)
730 return;
731
d19b9939
YW		 732 if (link->state != LINK_STATE_CONFIGURING)
733 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 734
735 if (!link->network)
736 return;
737
d19b9939
YW		 738 if (!link->addresses_configured)
739 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 740
d19b9939
YW		 741 if (!link->neighbors_configured)
742 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 743
90e74a66 744 SET_FOREACH(a, link->addresses)
39373cb9
YW		 745 if (!address_is_ready(a)) {
746 _cleanup_free_ char *str = NULL;
747
748 (void) in_addr_to_string(a->family, &a->in_addr, &str);
d19b9939 749 return (void) log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
39373cb9 750 }
6aa5773b 751
d19b9939
YW		 752 if (!link->static_routes_configured)
753 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 754
d19b9939
YW		 755 if (!link->static_nexthops_configured)
756 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 757
d19b9939
YW		 758 if (!link->routing_policy_rules_configured)
759 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 760
d19b9939
YW		 761 if (!link->tc_configured)
762 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 763
d19b9939
YW		 764 if (!link->sr_iov_configured)
765 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 766
d19b9939
YW		 767 if (!link->bridge_mdb_configured)
768 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 769
463797c1 770 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 771 bool has_ndisc_address = false;
772 NDiscAddress *n;
6accfd31 773
463797c1 774 if (link_ipv6ll_enabled(link) &&
d19b9939
YW		 775 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address))
776 return (void) log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
6accfd31 777
90e74a66 778 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 779 if (!n->marked) {
780 has_ndisc_address = true;
781 break;
782 }
783
0d0799da 784 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 785 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 786 !link->ipv4ll_address_configured)
787 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
788 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 789
0d0799da
YW		 790 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
791 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 792 if (!link->dhcp4_configured &&
793 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
794 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 795 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 796 !link->ipv4ll_address_configured)
797 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 798 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 799
0d0799da 800 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		 801 __func__,
802 yes_no(link->dhcp4_configured),
0d0799da 803 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 804 yes_no(link->dhcp6_address_configured),
805 yes_no(link->dhcp6_route_configured),
806 yes_no(link->dhcp6_pd_address_configured),
807 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 808 yes_no(link->ndisc_addresses_configured),
809 yes_no(link->ndisc_routes_configured));
39373cb9 810 }
463797c1 811 }
6accfd31 812
5f58af25 813 link_enter_configured(link);
6accfd31
DA		 814}
815
682c65b0 816static int link_set_static_configs(Link *link) {
f882c247
TG		 817 int r;
818
819 assert(link);
820 assert(link->network);
f5be5601 821 assert(link->state != _LINK_STATE_INVALID);
f882c247 822
2428613f 823 /* Reset all *_configured flags we are configuring. */
9b966cee 824 link->request_static_addresses = false;
2428613f 825 link->addresses_configured = false;
6aa5773b 826 link->addresses_ready = false;
2428613f
YW		 827 link->neighbors_configured = false;
828 link->static_routes_configured = false;
c16c7808 829 link->static_nexthops_configured = false;
2428613f
YW		 830 link->routing_policy_rules_configured = false;
831
f6bb7ac5
TJ		 832 r = link_set_bridge_fdb(link);
833 if (r < 0)
834 return r;
835
1f241589
YW		 836 r = link_set_bridge_mdb(link);
837 if (r < 0)
838 return r;
839
58f1fe9a 840 r = link_set_neighbors(link);
f3ef324d
YW		 841 if (r < 0)
842 return r;
e4a71bf3 843
682c65b0
YW		 844 r = link_set_addresses(link);
845 if (r < 0)
846 return r;
bd6379ec 847
fe2bc17c
YW		 848 r = link_set_address_labels(link);
849 if (r < 0)
850 return r;
f882c247 851
e5526518 852 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 853 r = dhcp4_server_configure(link);
854 if (r < 0)
855 return r;
d4cdbea5 856
f882c247
TG		 857 return 0;
858}
859
3a390124 860static int link_configure_continue(Link *link);
55dc8c4a 861
e16e4b3b
DS		 862static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
863 int r;
864
865 assert(link);
866
867 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
868 return 1;
869
870 r = sd_netlink_message_get_errno(m);
871 if (r < 0)
872 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
873 else
874 log_link_debug(link, "Setting MAC address done.");
875
876 return 1;
877}
878
879static int link_set_mac(Link *link) {
880 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
881 int r;
882
883 assert(link);
884 assert(link->network);
885 assert(link->manager);
886 assert(link->manager->rtnl);
887
888 if (!link->network->mac)
889 return 0;
890
891 log_link_debug(link, "Setting MAC address");
892
893 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
894 if (r < 0)
895 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
896
897 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
898 if (r < 0)
899 return log_link_error_errno(link, r, "Could not set MAC address: %m");
900
901 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
902 link_netlink_destroy_callback, link);
903 if (r < 0)
904 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
905
906 link_ref(link);
907
908 return 0;
909}
910
911static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
912 int r;
913
914 assert(link);
915
916 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
917 return 1;
918
919 r = sd_netlink_message_get_errno(m);
920 if (r < 0)
921 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
922 else
923 log_link_debug(link, "Setting nomaster done.");
924
925 return 1;
926}
927
928static int link_set_nomaster(Link *link) {
929 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
930 int r;
931
932 assert(link);
933 assert(link->network);
934 assert(link->manager);
935 assert(link->manager->rtnl);
936
937 /* set it free if not enslaved with networkd */
938 if (link->network->bridge || link->network->bond || link->network->vrf)
939 return 0;
940
941 log_link_debug(link, "Setting nomaster");
942
943 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
944 if (r < 0)
945 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
946
947 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
948 if (r < 0)
949 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
950
951 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
952 link_netlink_destroy_callback, link);
953 if (r < 0)
954 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
955
956 link_ref(link);
957
958 return 0;
959}
960
302a796f 961static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 962 int r;
963
964 assert(m);
965 assert(link);
966 assert(link->ifname);
967
55dc8c4a
YW		 968 link->setting_mtu = false;
969
5da8149f 970 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 971 return 1;
972
1c4baffc 973 r = sd_netlink_message_get_errno(m);
4ff296b0 974 if (r < 0)
5ecb131d 975 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 976 else
977 log_link_debug(link, "Setting MTU done.");
55dc8c4a 978
4ff296b0 979 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 980 r = link_configure_continue(link);
4ff296b0
YW		 981 if (r < 0)
982 link_enter_failed(link);
983 }
4f882b2a
TG		 984
985 return 1;
986}
987
933c70a0 988int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 989 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 990 int r;
991
992 assert(link);
993 assert(link->manager);
994 assert(link->manager->rtnl);
995
40288ece
YW		 996 if (mtu == 0 || link->setting_mtu)
997 return 0;
998
933c70a0 999 if (link->mtu == mtu)
ee493106
YW		 1000 return 0;
1001
6a7a4e4d 1002 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1003
6a7a4e4d
LP		 1004 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1005 if (r < 0)
1006 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1007
44b598a1 1008 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1009 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1010 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1011
1012 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1013 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1014
72c2500b 1015 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1016 }
1017
1c4baffc 1018 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1019 if (r < 0)
1020 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1021
302a796f
YW		 1022 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1023 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1024 if (r < 0)
1025 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1026
ae941762 1027 link_ref(link);
1046bf9b 1028 link->setting_mtu = true;
b226d99b 1029
4f882b2a
TG		 1030 return 0;
1031}
1032
f6fcc1c2
YW		 1033static bool link_reduces_vlan_mtu(Link *link) {
1034 /* See netif_reduces_vlan_mtu() in kernel. */
1035 return streq_ptr(link->kind, "macsec");
1036}
1037
1038static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1039 uint32_t mtu = 0;
1040 NetDev *dev;
f6fcc1c2 1041
90e74a66 1042 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1043 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1044 /* See vlan_dev_change_mtu() in kernel. */
1045 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1046
1047 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1048 /* See macvlan_change_mtu() in kernel. */
1049 mtu = dev->mtu;
1050
1051 return mtu;
1052}
1053
1054static int link_configure_mtu(Link *link) {
1055 uint32_t mtu;
1056
1057 assert(link);
1058 assert(link->network);
1059
1060 if (link->network->mtu > 0)
1061 return link_set_mtu(link, link->network->mtu);
1062
1063 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1064 if (link->mtu >= mtu)
1065 return 0;
1066
1067 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1068 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1069 link->mtu, mtu);
1070
1071 return link_set_mtu(link, mtu);
1072}
1073
302a796f 1074static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1075 int r;
1076
1077 assert(m);
1078 assert(link);
1079 assert(link->ifname);
1080
1081 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1082 return 1;
1083
1084 r = sd_netlink_message_get_errno(m);
1085 if (r < 0)
5ecb131d 1086 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1087
1088 return 1;
1089}
1090
1091static int link_set_flags(Link *link) {
1092 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1093 unsigned ifi_change = 0;
1094 unsigned ifi_flags = 0;
1095 int r;
1096
1097 assert(link);
1098 assert(link->manager);
1099 assert(link->manager->rtnl);
1100
1101 if (link->flags & IFF_LOOPBACK)
1102 return 0;
1103
1104 if (!link->network)
1105 return 0;
1106
937e305e
SS		 1107 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1108 link->network->promiscuous < 0)
99d2baa2
SS		 1109 return 0;
1110
1111 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1112 if (r < 0)
1113 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1114
1115 if (link->network->arp >= 0) {
1116 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1117 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1118 }
1119
1120 if (link->network->multicast >= 0) {
1121 ifi_change |= IFF_MULTICAST;
1122 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1123 }
1124
866e6b7a
SS		 1125 if (link->network->allmulticast >= 0) {
1126 ifi_change |= IFF_ALLMULTI;
1127 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1128 }
1129
937e305e
SS		 1130 if (link->network->promiscuous >= 0) {
1131 ifi_change |= IFF_PROMISC;
1132 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1133 }
1134
99d2baa2
SS		 1135 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1136 if (r < 0)
1137 return log_link_error_errno(link, r, "Could not set link flags: %m");
1138
302a796f
YW		 1139 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1140 link_netlink_destroy_callback, link);
99d2baa2
SS		 1141 if (r < 0)
1142 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1143
1144 link_ref(link);
1145
1146 return 0;
1147}
1148
e7ab854c
TG		 1149static int link_acquire_ipv6_conf(Link *link) {
1150 int r;
1151
1152 assert(link);
1153
2ffd6d73 1154 if (link->ndisc) {
e7ab854c
TG		 1155 log_link_debug(link, "Discovering IPv6 routers");
1156
1e7a0e21 1157 r = sd_ndisc_start(link->ndisc);
63348d13 1158 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1159 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1160 }
1161
086b8853 1162 if (link->radv) {
7465dd22
PF		 1163 assert(link->radv);
1164 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1165
1166 log_link_debug(link, "Starting IPv6 Router Advertisements");
1167
fd3ef936
YW		 1168 r = radv_emit_dns(link);
1169 if (r < 0)
1170 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1171
7465dd22
PF		 1172 r = sd_radv_start(link->radv);
1173 if (r < 0 && r != -EBUSY)
1174 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1175 }
1176
838d39af
SS		 1177 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1178 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1179 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1180 assert(link->dhcp6_client);
1181 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1182
838d39af 1183 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1184 if (r < 0 && r != -EBUSY)
1633c457 1185 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1186 else
1187 log_link_debug(link, "Acquiring DHCPv6 lease");
1188 }
1189
1633c457
YW		 1190 r = dhcp6_request_prefix_delegation(link);
1191 if (r < 0)
1192 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1193
e7ab854c
TG		 1194 return 0;
1195}
1196
6fc25497 1197static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1198 int r;
1199
1200 assert(link);
ff254138
TG		 1201 assert(link->manager);
1202 assert(link->manager->event);
1203
0107b769
ZJS		 1204 if (link->dhcp_client) {
1205 log_link_debug(link, "Acquiring DHCPv4 lease");
1206
1207 r = sd_dhcp_client_start(link->dhcp_client);
1208 if (r < 0)
1209 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
1210
0b4b66cc 1211 } else if (link->ipv4ll) {
6a7a4e4d 1212 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1213
1214 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1215 if (r < 0)
1216 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1217 }
1218
6fc25497
SS		 1219 return 0;
1220}
1221
1222static int link_acquire_conf(Link *link) {
1223 int r;
1224
1225 assert(link);
1226
1227 r = link_acquire_ipv4_conf(link);
1228 if (r < 0)
1229 return r;
1230
3f7cc080 1231 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1232 r = link_acquire_ipv6_conf(link);
1233 if (r < 0)
1234 return r;
1235 }
1236
2ffd6d73
YW		 1237 r = link_lldp_emit_start(link);
1238 if (r < 0)
1239 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1240
ff254138
TG		 1241 return 0;
1242}
1243
a61bb41c 1244bool link_has_carrier(Link *link) {
deb2e523
TG		 1245 /* see Documentation/networking/operstates.txt in the kernel sources */
1246
a61bb41c 1247 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1248 return true;
1249
a61bb41c 1250 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1251 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1252 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1253 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1254 return true;
1255
1256 return false;
1257}
1258
0e2fdb83
SS		 1259static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1260 int r;
1261
1262 assert(link);
1263
9524014e
DS		 1264 link->setting_genmode = false;
1265
0e2fdb83
SS		 1266 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1267 return 1;
1268
1269 r = sd_netlink_message_get_errno(m);
1270 if (r < 0)
5ecb131d 1271 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1272 else
1273 log_link_debug(link, "Setting address genmode done.");
1274
1275 if (link->state == LINK_STATE_INITIALIZED) {
1276 r = link_configure_continue(link);
1277 if (r < 0)
1278 link_enter_failed(link);
1279 }
0e2fdb83
SS		 1280
1281 return 1;
1282}
1283
1284static int link_configure_addrgen_mode(Link *link) {
1285 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1286 uint8_t ipv6ll_mode;
1287 int r;
1288
1289 assert(link);
1290 assert(link->network);
1291 assert(link->manager);
1292 assert(link->manager->rtnl);
1293
9524014e 1294 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1295 return 0;
1296
0e2fdb83
SS		 1297 log_link_debug(link, "Setting address genmode for link");
1298
1299 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1300 if (r < 0)
1301 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1302
1303 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1304 if (r < 0)
1305 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1306
1307 r = sd_netlink_message_open_container(req, AF_INET6);
1308 if (r < 0)
1309 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1310
1311 if (!link_ipv6ll_enabled(link))
1312 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1313 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1314 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1315 if (r < 0) {
1316 /* The file may not exist. And even if it exists, when stable_secret is unset,
1317 * reading the file fails with EIO. */
1318 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1319
1320 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1321 } else
1322 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1323 } else
6f6296b9 1324 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1325
1326 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1327 if (r < 0)
1328 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1329
1330 r = sd_netlink_message_close_container(req);
1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %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 IFLA_AF_SPEC container: %m");
1337
1338 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1339 link_netlink_destroy_callback, link);
1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1342
1343 link_ref(link);
9524014e 1344 link->setting_genmode = true;
0e2fdb83
SS		 1345
1346 return 0;
1347}
1348
302a796f 1349static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1350 int r;
1351
1746cf2a
TG		 1352 assert(link);
1353
5da8149f 1354 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1355 return 1;
1356
1c4baffc 1357 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1358 if (r < 0)
26d6b214 1359 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1360 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1361
f882c247
TG		 1362 return 1;
1363}
1364
1cc84f3b 1365static int link_up(Link *link) {
4afd3348 1366 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1367 int r;
1368
f882c247 1369 assert(link);
c106cc36 1370 assert(link->network);
f882c247
TG		 1371 assert(link->manager);
1372 assert(link->manager->rtnl);
1373
6a7a4e4d 1374 log_link_debug(link, "Bringing link up");
449f7554 1375
6a7a4e4d
LP		 1376 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1379
5d4795f3 1380 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1383
302a796f
YW		 1384 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1385 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1388
b226d99b
TG		 1389 link_ref(link);
1390
f882c247
TG		 1391 return 0;
1392}
1393
302a796f 1394static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1395 int r;
1396
1397 assert(link);
1398
1399 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1400 return 1;
1401
1c4baffc 1402 r = sd_netlink_message_get_errno(m);
0d4ad91d 1403 if (r < 0)
5ecb131d 1404 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1405
1406 return 1;
1407}
1408
8e54db83 1409int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1410 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1411 int r;
1412
1413 assert(link);
1414 assert(link->manager);
1415 assert(link->manager->rtnl);
1416
6a7a4e4d 1417 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1418
1419 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1420 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1423
1424 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1427
8e54db83
YW		 1428 r = netlink_call_async(link->manager->rtnl, NULL, req,
1429 callback ?: link_down_handler,
302a796f 1430 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1433
1434 link_ref(link);
1435
1436 return 0;
1437}
1438
89fe6535
SS		 1439static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1440 int r;
1441
1442 assert(link);
1443
1444 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1445 return 1;
1446
1447 r = sd_netlink_message_get_errno(m);
1448 if (r < 0)
1449 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1450
1451 return 1;
1452}
1453
1454static int link_set_group(Link *link) {
1455 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1456 int r;
1457
1458 assert(link);
1459 assert(link->network);
1460 assert(link->manager);
1461 assert(link->manager->rtnl);
1462
1463 if (link->network->group <= 0)
1464 return 0;
1465
1466 log_link_debug(link, "Setting group");
1467
1468 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1469 if (r < 0)
1470 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1471
1472 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not set link group: %m");
1475
1476 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1477 link_netlink_destroy_callback, link);
1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1480
1481 link_ref(link);
1482
1483 return 0;
1484}
1485
0a9fb9ba
SS		 1486static int link_tx_rx_queues_hadler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1487 int r;
1488
1489 assert(link);
1490
1491 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1492 return 1;
1493
1494 r = sd_netlink_message_get_errno(m);
1495 if (r < 0)
1496 log_link_message_warning_errno(link, m, r, "Could not set transmit / receive queues for the interface");
1497
1498 return 1;
1499}
1500
1501static int link_set_tx_rx_queues(Link *link) {
1502 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1503 int r;
1504
1505 assert(link);
1506 assert(link->network);
1507 assert(link->manager);
1508 assert(link->manager->rtnl);
1509
1510 if (link->network->txqueues == 0 && link->network->rxqueues == 0)
1511 return 0;
1512
1513 log_link_debug(link, "Setting transmit / receive queues");
1514
1515 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1518
1519 if (link->network->txqueues > 0) {
1520 r = sd_netlink_message_append_u32(req, IFLA_NUM_TX_QUEUES, link->network->txqueues);
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not set link transmit queues: %m");
1523 }
1524
1525 if (link->network->rxqueues > 0) {
1526 r = sd_netlink_message_append_u32(req, IFLA_NUM_RX_QUEUES, link->network->rxqueues);
1527 if (r < 0)
1528 return log_link_error_errno(link, r, "Could not set link receive queues: %m");
1529 }
1530
1531 r = netlink_call_async(link->manager->rtnl, NULL, req, link_tx_rx_queues_hadler,
1532 link_netlink_destroy_callback, link);
1533 if (r < 0)
1534 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1535
1536 link_ref(link);
1537
1538 return 0;
1539}
1540
0d4ad91d
AR		 1541static int link_handle_bound_to_list(Link *link) {
1542 Link *l;
0d4ad91d
AR		 1543 int r;
1544 bool required_up = false;
1545 bool link_is_up = false;
1546
1547 assert(link);
1548
1549 if (hashmap_isempty(link->bound_to_links))
1550 return 0;
1551
1552 if (link->flags & IFF_UP)
1553 link_is_up = true;
1554
90e74a66 1555 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1556 if (link_has_carrier(l)) {
1557 required_up = true;
1558 break;
1559 }
1560
1561 if (!required_up && link_is_up) {
8e54db83 1562 r = link_down(link, NULL);
0d4ad91d
AR		 1563 if (r < 0)
1564 return r;
1565 } else if (required_up && !link_is_up) {
1566 r = link_up(link);
1567 if (r < 0)
1568 return r;
1569 }
1570
1571 return 0;
1572}
1573
1574static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1575 Link *l;
1576 int r;
1577
1578 assert(link);
1579
1580 if (hashmap_isempty(link->bound_by_links))
1581 return 0;
1582
90e74a66 1583 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1584 r = link_handle_bound_to_list(l);
1585 if (r < 0)
1586 return r;
1587 }
1588
1589 return 0;
1590}
1591
1592static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1593 int r;
1594
1595 assert(link);
1596 assert(carrier);
1597
1598 if (link == carrier)
1599 return 0;
1600
1601 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1602 return 0;
1603
1604 r = hashmap_ensure_allocated(h, NULL);
1605 if (r < 0)
1606 return r;
1607
1608 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1609 if (r < 0)
1610 return r;
1611
1612 return 0;
1613}
1614
1615static int link_new_bound_by_list(Link *link) {
1616 Manager *m;
1617 Link *carrier;
0d4ad91d
AR		 1618 int r;
1619 bool list_updated = false;
1620
1621 assert(link);
1622 assert(link->manager);
1623
1624 m = link->manager;
1625
90e74a66 1626 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1627 if (!carrier->network)
1628 continue;
1629
1630 if (strv_isempty(carrier->network->bind_carrier))
1631 continue;
1632
191a3f16 1633 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1634 r = link_put_carrier(link, carrier, &link->bound_by_links);
1635 if (r < 0)
1636 return r;
1637
1638 list_updated = true;
1639 }
1640 }
1641
1642 if (list_updated)
84de38c5 1643 link_dirty(link);
0d4ad91d 1644
90e74a66 1645 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1646 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1647 if (r < 0)
1648 return r;
1649
84de38c5 1650 link_dirty(carrier);
0d4ad91d
AR		 1651 }
1652
1653 return 0;
1654}
1655
1656static int link_new_bound_to_list(Link *link) {
1657 Manager *m;
1658 Link *carrier;
0d4ad91d
AR		 1659 int r;
1660 bool list_updated = false;
1661
1662 assert(link);
1663 assert(link->manager);
1664
1665 if (!link->network)
1666 return 0;
1667
1668 if (strv_isempty(link->network->bind_carrier))
1669 return 0;
1670
1671 m = link->manager;
1672
90e74a66 1673 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1674 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1675 r = link_put_carrier(link, carrier, &link->bound_to_links);
1676 if (r < 0)
1677 return r;
1678
1679 list_updated = true;
1680 }
1681 }
1682
1683 if (list_updated)
84de38c5 1684 link_dirty(link);
0d4ad91d 1685
90e74a66 1686 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1687 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1688 if (r < 0)
1689 return r;
1690
84de38c5 1691 link_dirty(carrier);
0d4ad91d
AR		 1692 }
1693
1694 return 0;
1695}
1696
1697static int link_new_carrier_maps(Link *link) {
1698 int r;
1699
1700 r = link_new_bound_by_list(link);
1701 if (r < 0)
1702 return r;
1703
1704 r = link_handle_bound_by_list(link);
1705 if (r < 0)
1706 return r;
1707
1708 r = link_new_bound_to_list(link);
1709 if (r < 0)
1710 return r;
1711
1712 r = link_handle_bound_to_list(link);
1713 if (r < 0)
1714 return r;
1715
1716 return 0;
1717}
1718
1719static void link_free_bound_to_list(Link *link) {
1720 Link *bound_to;
0d4ad91d 1721
90e74a66 1722 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 1723 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
1724
1725 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1726 link_dirty(bound_to);
0d4ad91d
AR		 1727 }
1728
1729 return;
1730}
1731
1732static void link_free_bound_by_list(Link *link) {
1733 Link *bound_by;
0d4ad91d 1734
90e74a66 1735 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 1736 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
1737
1738 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1739 link_dirty(bound_by);
0d4ad91d
AR		 1740 link_handle_bound_to_list(bound_by);
1741 }
1742 }
1743
1744 return;
1745}
1746
1747static void link_free_carrier_maps(Link *link) {
1748 bool list_updated = false;
1749
1750 assert(link);
1751
1752 if (!hashmap_isempty(link->bound_to_links)) {
1753 link_free_bound_to_list(link);
1754 list_updated = true;
1755 }
1756
1757 if (!hashmap_isempty(link->bound_by_links)) {
1758 link_free_bound_by_list(link);
1759 list_updated = true;
1760 }
1761
1762 if (list_updated)
84de38c5 1763 link_dirty(link);
0d4ad91d
AR		 1764
1765 return;
1766}
1767
5f707e12
YW		 1768static int link_append_to_master(Link *link, NetDev *netdev) {
1769 Link *master;
1770 int r;
1771
1772 assert(link);
1773 assert(netdev);
1774
1775 r = link_get(link->manager, netdev->ifindex, &master);
1776 if (r < 0)
1777 return r;
1778
de7fef4b 1779 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1780 if (r <= 0)
5f707e12
YW		 1781 return r;
1782
1783 link_ref(link);
1784 return 0;
1785}
1786
1787static void link_drop_from_master(Link *link, NetDev *netdev) {
1788 Link *master;
1789
1790 assert(link);
1791
1792 if (!link->manager || !netdev)
1793 return;
1794
1795 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1796 return;
1797
1798 link_unref(set_remove(master->slaves, link));
1799}
1800
1801static void link_detach_from_manager(Link *link) {
1802 if (!link || !link->manager)
1803 return;
1804
1805 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1806 link_clean(link);
1807
1808 /* The following must be called at last. */
1809 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1810 link_unref(link);
1811}
1812
0d4ad91d
AR		 1813void link_drop(Link *link) {
1814 if (!link || link->state == LINK_STATE_LINGER)
1815 return;
1816
1817 link_set_state(link, LINK_STATE_LINGER);
1818
1819 link_free_carrier_maps(link);
1820
5f707e12
YW		 1821 if (link->network) {
1822 link_drop_from_master(link, link->network->bridge);
1823 link_drop_from_master(link, link->network->bond);
1824 }
1825
6a7a4e4d 1826 log_link_debug(link, "Link removed");
0d4ad91d 1827
db2f8a2e 1828 (void) unlink(link->state_file);
c4397d94 1829 link_detach_from_manager(link);
0d4ad91d
AR		 1830}
1831
3f265037 1832static int link_joined(Link *link) {
f882c247
TG		 1833 int r;
1834
ef1ba606 1835 assert(link);
f5be5601 1836 assert(link->network);
dd3efc09 1837
0d4ad91d
AR		 1838 if (!hashmap_isempty(link->bound_to_links)) {
1839 r = link_handle_bound_to_list(link);
1840 if (r < 0)
1841 return r;
1842 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 1843 r = link_up(link);
1844 if (r < 0) {
1845 link_enter_failed(link);
1846 return r;
1847 }
ef1ba606 1848 }
f882c247 1849
9ed794a3 1850 if (link->network->bridge) {
e1853b00 1851 r = link_set_bridge(link);
6a7a4e4d
LP		 1852 if (r < 0)
1853 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1854
1855 r = link_append_to_master(link, link->network->bridge);
1856 if (r < 0)
1857 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1858 }
1859
eb64b435 1860 if (link->network->bond) {
7fcee284 1861 r = link_set_bond(link);
eb64b435
SS		 1862 if (r < 0)
1863 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1864
45e11abf 1865 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1866 if (r < 0)
1867 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1868 }
1869
34d7f2c9
YW		 1870 r = link_set_bridge_vlan(link);
1871 if (r < 0)
1872 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1873
c1835a42
RM		 1874 /* Skip setting up addresses until it gets carrier,
1875 or it would try to set addresses twice,
1876 which is bad for non-idempotent steps. */
dad2d78e 1877 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1878 return 0;
1879
b425c3ae 1880 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1881
1882 r = link_acquire_conf(link);
1883 if (r < 0)
1884 return r;
1885
682c65b0 1886 return link_set_static_configs(link);
02b59d57
TG		 1887}
1888
302a796f 1889static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1890 int r;
1891
1746cf2a 1892 assert(link);
ef1ba606 1893 assert(link->network);
34bf3c00 1894 assert(link->enslaving > 0);
02b59d57 1895
313cefa1 1896 link->enslaving--;
52433f6b 1897
5da8149f 1898 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1899 return 1;
1900
1c4baffc 1901 r = sd_netlink_message_get_errno(m);
856f962c 1902 if (r < 0 && r != -EEXIST) {
5ecb131d 1903 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1904 link_enter_failed(link);
1905 return 1;
4ff296b0
YW		 1906 }
1907
1908 log_link_debug(link, "Joined netdev");
02b59d57 1909
34bf3c00 1910 if (link->enslaving == 0) {
4ff296b0
YW		 1911 r = link_joined(link);
1912 if (r < 0)
1913 link_enter_failed(link);
34bf3c00 1914 }
02b59d57
TG		 1915
1916 return 1;
1917}
1918
3f265037 1919static int link_enter_join_netdev(Link *link) {
6a0a2f86 1920 NetDev *netdev;
02b59d57
TG		 1921 int r;
1922
1923 assert(link);
1924 assert(link->network);
bd08ce56 1925 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1926
289e6774 1927 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1928
84de38c5 1929 link_dirty(link);
34bf3c00 1930 link->enslaving = 0;
02b59d57 1931
d9c67ea1 1932 if (link->network->bond) {
cbff7170
TJ		 1933 if (link->network->bond->state == NETDEV_STATE_READY &&
1934 link->network->bond->ifindex == link->master_ifindex)
1935 return link_joined(link);
1936
f2341e0a
LP		 1937 log_struct(LOG_DEBUG,
1938 LOG_LINK_INTERFACE(link),
1939 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1940 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1941
34bf3c00
YW		 1942 link->enslaving++;
1943
f2341e0a 1944 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1945 if (r < 0) {
f2341e0a
LP		 1946 log_struct_errno(LOG_WARNING, r,
1947 LOG_LINK_INTERFACE(link),
1948 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1949 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1950 link_enter_failed(link);
1951 return r;
1952 }
0ad6148e
MO		 1953 }
1954
d9c67ea1 1955 if (link->network->bridge) {
f2341e0a
LP		 1956 log_struct(LOG_DEBUG,
1957 LOG_LINK_INTERFACE(link),
1958 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1959 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1960
34bf3c00
YW		 1961 link->enslaving++;
1962
f2341e0a 1963 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1964 if (r < 0) {
f2341e0a
LP		 1965 log_struct_errno(LOG_WARNING, r,
1966 LOG_LINK_INTERFACE(link),
1967 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1968 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1969 link_enter_failed(link);
1970 return r;
1971 }
52433f6b
TG		 1972 }
1973
6cb955c6
AR		 1974 if (link->network->vrf) {
1975 log_struct(LOG_DEBUG,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1978 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1979
34bf3c00
YW		 1980 link->enslaving++;
1981
6cb955c6
AR		 1982 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1983 if (r < 0) {
1984 log_struct_errno(LOG_WARNING, r,
1985 LOG_LINK_INTERFACE(link),
1986 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1987 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1988 link_enter_failed(link);
1989 return r;
1990 }
6cb955c6
AR		 1991 }
1992
90e74a66 1993 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1994
2b6db913
YW		 1995 if (netdev->ifindex > 0)
1996 /* Assume already enslaved. */
a63e5daa 1997 continue;
a63e5daa 1998
7033af49
YW		 1999 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2000 continue;
2001
f2341e0a
LP		 2002 log_struct(LOG_DEBUG,
2003 LOG_LINK_INTERFACE(link),
2004 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2005 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2006
34bf3c00
YW		 2007 link->enslaving++;
2008
f2341e0a 2009 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2010 if (r < 0) {
f2341e0a
LP		 2011 log_struct_errno(LOG_WARNING, r,
2012 LOG_LINK_INTERFACE(link),
2013 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2014 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2015 link_enter_failed(link);
2016 return r;
2017 }
326cb406
SS		 2018 }
2019
34bf3c00
YW		 2020 if (link->enslaving == 0)
2021 return link_joined(link);
2022
ef1ba606
TG		 2023 return 0;
2024}
2025
5e5b137a 2026static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2027 int k, r;
2028
2029 assert(link);
2030 assert(link->manager);
5e5b137a 2031
f8f2f880 2032 r = link_drop_foreign_addresses(link);
5e5b137a 2033
0b81225e
YW		 2034 k = link_drop_foreign_neighbors(link);
2035 if (k < 0 && r >= 0)
2036 r = k;
2037
2038 k = link_drop_foreign_routes(link);
2039 if (k < 0 && r >= 0)
2040 r = k;
d1bdafd2 2041
0b81225e
YW		 2042 k = manager_drop_foreign_routing_policy_rules(link->manager);
2043 if (k < 0 && r >= 0)
2044 r = k;
2045
2046 return r;
5e5b137a
TG		 2047}
2048
3104883d 2049static int link_drop_config(Link *link) {
0b81225e
YW		 2050 int k, r;
2051
2052 assert(link);
2053 assert(link->manager);
3104883d 2054
d7fbb9f5 2055 r = link_drop_addresses(link);
3104883d 2056
0b81225e
YW		 2057 k = link_drop_neighbors(link);
2058 if (k < 0 && r >= 0)
2059 r = k;
d1bdafd2 2060
0b81225e
YW		 2061 k = link_drop_routes(link);
2062 if (k < 0 && r >= 0)
2063 r = k;
2064
2065 k = manager_drop_routing_policy_rules(link->manager, link);
2066 if (k < 0 && r >= 0)
2067 r = k;
3104883d 2068
c69305ff
LP		 2069 ndisc_flush(link);
2070
0b81225e 2071 return r;
3104883d
SS		 2072}
2073
256c75fd 2074int link_configure(Link *link) {
4ecdcb07
YW		 2075 int r;
2076
ef1ba606 2077 assert(link);
b22d8a00 2078 assert(link->network);
bd08ce56 2079 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2080
34658df2 2081 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2082 if (r < 0)
2083 return r;
2084
518cd6b5
SS		 2085 r = link_configure_sr_iov(link);
2086 if (r < 0)
2087 return r;
2088
500b96eb 2089 if (link->iftype == ARPHRD_CAN)
93ea7750 2090 return link_configure_can(link);
92c918b0 2091
5e0534f1 2092 r = link_set_sysctl(link);
b69c3180
SS		 2093 if (r < 0)
2094 return r;
8749cbcd 2095
5e0534f1 2096 r = link_set_ipv6_proxy_ndp_addresses(link);
94d76d07
YW		 2097 if (r < 0)
2098 return r;
2099
e16e4b3b
DS		 2100 r = link_set_mac(link);
2101 if (r < 0)
2102 return r;
2103
2104 r = link_set_nomaster(link);
2105 if (r < 0)
2106 return r;
2107
99d2baa2
SS		 2108 r = link_set_flags(link);
2109 if (r < 0)
2110 return r;
2111
89fe6535
SS		 2112 r = link_set_group(link);
2113 if (r < 0)
2114 return r;
2115
0a9fb9ba
SS		 2116 r = link_set_tx_rx_queues(link);
2117 if (r < 0)
2118 return r;
2119
2ffd6d73
YW		 2120 r = ipv4ll_configure(link);
2121 if (r < 0)
2122 return r;
64b21ece 2123
2ffd6d73
YW		 2124 r = dhcp4_configure(link);
2125 if (r < 0)
2126 return r;
eb34d4af 2127
2ffd6d73
YW		 2128 r = dhcp6_configure(link);
2129 if (r < 0)
2130 return r;
f5a8c43f 2131
2ffd6d73
YW		 2132 r = ndisc_configure(link);
2133 if (r < 0)
2134 return r;
4138fb2c 2135
086b8853
YW		 2136 r = radv_configure(link);
2137 if (r < 0)
2138 return r;
7465dd22 2139
2ffd6d73
YW		 2140 r = link_lldp_rx_configure(link);
2141 if (r < 0)
2142 return r;
ce43e484 2143
f6fcc1c2 2144 r = link_configure_mtu(link);
40288ece
YW		 2145 if (r < 0)
2146 return r;
44b598a1 2147
9f6e82e6
YW		 2148 r = link_configure_addrgen_mode(link);
2149 if (r < 0)
2150 return r;
0e2fdb83 2151
3a390124
DS		 2152 return link_configure_continue(link);
2153}
2154
2155/* The configuration continues in this separate function, instead of
2156 * including this in the above link_configure() function, for two
2157 * reasons:
2158 * 1) some devices reset the link when the mtu is set, which caused
2159 * an infinite loop here in networkd; see:
2160 * https://github.com/systemd/systemd/issues/6593
2161 * https://github.com/systemd/systemd/issues/9831
2162 * 2) if ipv6ll is disabled, then bringing the interface up must be
2163 * delayed until after we get confirmation from the kernel that
2164 * the addr_gen_mode parameter has been set (via netlink), see:
2165 * https://github.com/systemd/systemd/issues/13882
2166 */
2167static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2168 int r;
2169
2170 assert(link);
2171 assert(link->network);
bd08ce56 2172 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2173
9524014e 2174 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2175 return 0;
2176
4c649652
DS		 2177 /* Drop foreign config, but ignore loopback or critical devices.
2178 * We do not want to remove loopback address or addresses used for root NFS. */
2179 if (!(link->flags & IFF_LOOPBACK) &&
2180 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2181 r = link_drop_foreign_config(link);
2182 if (r < 0)
2183 return r;
2184 }
2185
d236718c
DS		 2186 /* The kernel resets ipv6 mtu after changing device mtu;
2187 * we must set this here, after we've set device mtu */
2188 r = link_set_ipv6_mtu(link);
2189 if (r < 0)
5e0534f1 2190 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2191
3f265037 2192 return link_enter_join_netdev(link);
505f8da7
TG		 2193}
2194
572b21d9 2195static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2196 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2197 Network *network;
2198 int r;
2199
8bceafa7 2200 assert(m);
572b21d9 2201
8bceafa7
YW		 2202 r = sd_netlink_message_get_errno(m);
2203 if (r < 0)
2204 return r;
572b21d9 2205
8bceafa7
YW		 2206 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2207 if (r < 0 && r != -ENODATA)
2208 return r;
572b21d9 2209
8bceafa7 2210 strv_free_and_replace(link->alternative_names, s);
572b21d9 2211
c643bda5
YW		 2212 r = network_get(link->manager, link->iftype, link->sd_device,
2213 link->ifname, link->alternative_names, link->driver,
b8162cd2 2214 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2215 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2216 if (r == -ENOENT) {
2217 link_enter_unmanaged(link);
2218 return 0;
2219 } else if (r == 0 && network->unmanaged) {
2220 link_enter_unmanaged(link);
2221 return 0;
2222 } else if (r < 0)
2223 return r;
2224
99b8517c 2225 if (link->network == network && !force)
ad932b15
YW		 2226 return 0;
2227
2228 log_link_info(link, "Re-configuring with %s", network->filename);
2229
2230 /* Dropping old .network file */
2a99eed0 2231 r = link_stop_engines(link, false);
572b21d9 2232 if (r < 0)
ad932b15 2233 return r;
ad932b15 2234
ad932b15
YW		 2235 r = link_drop_config(link);
2236 if (r < 0)
2237 return r;
2238
2c7b826d 2239 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 2240 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
2241 r = link_drop_foreign_config(link);
2242 if (r < 0)
2243 return r;
2244 }
2245
2246 link_free_carrier_maps(link);
2247 link_free_engines(link);
2248 link->network = network_unref(link->network);
59c31eba 2249 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2250
2251 /* Then, apply new .network file */
2252 r = network_apply(network, link);
2253 if (r < 0)
2254 return r;
2255
2256 r = link_new_carrier_maps(link);
2257 if (r < 0)
2258 return r;
2259
2260 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 2261 link_dirty(link);
ad932b15
YW		 2262
2263 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2264 * link_configure() is called later asynchronously. */
2265 r = link_configure_duid(link);
2266 if (r <= 0)
2267 return r;
2268
2269 r = link_configure(link);
2270 if (r < 0)
2271 return r;
2272
2273 return 0;
2274}
2275
572b21d9
YW		 2276static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2277 int r;
2278
2279 r = link_reconfigure_internal(link, m, false);
2280 if (r < 0)
2281 link_enter_failed(link);
2282
2283 return 1;
2284}
2285
2286static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2287 int r;
2288
2289 r = link_reconfigure_internal(link, m, true);
2290 if (r < 0)
2291 link_enter_failed(link);
2292
2293 return 1;
2294}
2295
2296int link_reconfigure(Link *link, bool force) {
2297 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2298 int r;
2299
8bceafa7 2300 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2301 * the function from being called multiple times simultaneously, refuse to reconfigure the
2302 * interface in these cases. */
8bceafa7 2303 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2304 return 0; /* 0 means no-op. */
2c0d7ed3 2305
572b21d9
YW		 2306 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2307 link->ifindex);
2308 if (r < 0)
2309 return r;
2310
2311 r = netlink_call_async(link->manager->rtnl, NULL, req,
2312 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2313 link_netlink_destroy_callback, link);
2314 if (r < 0)
2315 return r;
2316
2317 link_ref(link);
2318
8bceafa7 2319 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2320}
2321
e6bf7774 2322static int link_initialized_and_synced(Link *link) {
505f8da7 2323 Network *network;
505f8da7
TG		 2324 int r;
2325
2326 assert(link);
2327 assert(link->ifname);
2328 assert(link->manager);
2329
bd08ce56
YW		 2330 /* We may get called either from the asynchronous netlink callback,
2331 * or directly for link_add() if running in a container. See link_add(). */
2332 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2333 return 0;
505f8da7 2334
6a7a4e4d 2335 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2336 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2337
0d4ad91d
AR		 2338 r = link_new_bound_by_list(link);
2339 if (r < 0)
2340 return r;
2341
2342 r = link_handle_bound_by_list(link);
2343 if (r < 0)
2344 return r;
2345
c4a03a56 2346 if (!link->network) {
0894cfe4 2347 r = wifi_get_info(link);
8d968fdd
YW		 2348 if (r < 0)
2349 return r;
2350
c643bda5
YW		 2351 r = network_get(link->manager, link->iftype, link->sd_device,
2352 link->ifname, link->alternative_names, link->driver,
b8162cd2 2353 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2354 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2355 if (r == -ENOENT) {
2356 link_enter_unmanaged(link);
4232cf04 2357 return 0;
a09dc546
DM		 2358 } else if (r == 0 && network->unmanaged) {
2359 link_enter_unmanaged(link);
2360 return 0;
c4a03a56
TG		 2361 } else if (r < 0)
2362 return r;
505f8da7 2363
c4a03a56
TG		 2364 if (link->flags & IFF_LOOPBACK) {
2365 if (network->link_local != ADDRESS_FAMILY_NO)
2366 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2367
c4a03a56
TG		 2368 if (network->dhcp != ADDRESS_FAMILY_NO)
2369 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2370
c4a03a56
TG		 2371 if (network->dhcp_server)
2372 log_link_debug(link, "Ignoring DHCP server for loopback link");
2373 }
bd2efe92 2374
7d342c03 2375 r = network_apply(network, link);
c4a03a56
TG		 2376 if (r < 0)
2377 return r;
2378 }
505f8da7 2379
0d4ad91d
AR		 2380 r = link_new_bound_to_list(link);
2381 if (r < 0)
2382 return r;
2383
27dfc982
YW		 2384 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
2385 * link_configure() is called later asynchronously. */
2386 r = link_configure_duid(link);
2387 if (r <= 0)
2388 return r;
2389
a748b692
TG		 2390 r = link_configure(link);
2391 if (r < 0)
2392 return r;
2393
4232cf04 2394 return 0;
505f8da7
TG		 2395}
2396
302a796f 2397static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2398 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2399 int r;
2400
572b21d9
YW		 2401 r = sd_netlink_message_get_errno(m);
2402 if (r < 0) {
40681e5c 2403 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2404 link_enter_failed(link);
2405 return 0;
2406 }
2407
2408 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2409 if (r < 0 && r != -ENODATA) {
2410 link_enter_failed(link);
2411 return 0;
2412 }
2413
2414 strv_free_and_replace(link->alternative_names, s);
2415
4ff296b0
YW		 2416 r = link_initialized_and_synced(link);
2417 if (r < 0)
2418 link_enter_failed(link);
e6bf7774
YW		 2419 return 1;
2420}
2421
51517f9e 2422int link_initialized(Link *link, sd_device *device) {
4afd3348 2423 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2424 int r;
2425
2426 assert(link);
2427 assert(link->manager);
2428 assert(link->manager->rtnl);
2429 assert(device);
2430
8434fd5c 2431 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2432 return 0;
2433
51517f9e 2434 if (link->sd_device)
679b3605
TG		 2435 return 0;
2436
79008bdd 2437 log_link_debug(link, "udev initialized link");
bd08ce56 2438 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2439
51517f9e 2440 link->sd_device = sd_device_ref(device);
4f561e8e 2441
3c9b8860
TG		 2442 /* udev has initialized the link, but we don't know if we have yet
2443 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2444 * when it returns we know that the pending NEWLINKs have already been
2445 * processed and that we are up-to-date */
4f561e8e 2446
3c9b8860
TG		 2447 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2448 link->ifindex);
4f561e8e
TG		 2449 if (r < 0)
2450 return r;
2451
302a796f
YW		 2452 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2453 link_netlink_destroy_callback, link);
4f561e8e
TG		 2454 if (r < 0)
2455 return r;
2456
5da8149f
TG		 2457 link_ref(link);
2458
4f561e8e
TG		 2459 return 0;
2460}
2461
1c4baffc 2462int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2463 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2464 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2465 Link *link;
5a937ea2 2466 int r;
505f8da7
TG		 2467
2468 assert(m);
fbbeb65a 2469 assert(m->rtnl);
505f8da7
TG		 2470 assert(message);
2471 assert(ret);
2472
2473 r = link_new(m, message, ret);
2474 if (r < 0)
2475 return r;
2476
2477 link = *ret;
2478
6a7a4e4d 2479 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2480
bf331d87
YW		 2481 if (path_is_read_only_fs("/sys") <= 0) {
2482 /* udev should be around */
ae06ab10 2483 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2484 r = sd_device_new_from_device_id(&device, ifindex_str);
2485 if (r < 0) {
4d59e14f
YW		 2486 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
2487 return 0;
5c416fc4 2488 }
505f8da7 2489
5a937ea2 2490 r = sd_device_get_is_initialized(device);
51517f9e 2491 if (r < 0) {
bf331d87 2492 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2493 goto failed;
2494 }
5a937ea2 2495 if (r == 0) {
505f8da7 2496 /* not yet ready */
79008bdd 2497 log_link_debug(link, "link pending udev initialization...");
505f8da7 2498 return 0;
3c4cb064 2499 }
505f8da7 2500
299ad32d
YW		 2501 r = device_is_renaming(device);
2502 if (r < 0) {
bf331d87 2503 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2504 goto failed;
2505 }
2506 if (r > 0) {
bf331d87 2507 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2508 return 0;
2509 }
2510
4f561e8e
TG		 2511 r = link_initialized(link, device);
2512 if (r < 0)
5c416fc4 2513 goto failed;
4f561e8e 2514 } else {
e6bf7774 2515 r = link_initialized_and_synced(link);
4f561e8e 2516 if (r < 0)
5c416fc4 2517 goto failed;
4f561e8e 2518 }
505f8da7 2519
a748b692 2520 return 0;
5c416fc4
TG		 2521failed:
2522 link_enter_failed(link);
2523 return r;
a748b692
TG		 2524}
2525
c601ebf7 2526int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2527 int r;
2528
2529 assert(link);
2530
2531 log_link_info(link, "Gained IPv6LL");
2532
c601ebf7 2533 link->ipv6ll_address = *address;
e7ab854c
TG		 2534 link_check_ready(link);
2535
b9ea3d2e 2536 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2537 r = link_acquire_ipv6_conf(link);
2538 if (r < 0) {
2539 link_enter_failed(link);
2540 return r;
2541 }
2542 }
2543
2544 return 0;
2545}
2546
9c0a72f9
TG		 2547static int link_carrier_gained(Link *link) {
2548 int r;
2549
2550 assert(link);
2551
0894cfe4 2552 r = wifi_get_info(link);
8d968fdd
YW		 2553 if (r < 0)
2554 return r;
2555 if (r > 0) {
8bceafa7 2556 r = link_reconfigure(link, false);
572b21d9
YW		 2557 if (r < 0) {
2558 link_enter_failed(link);
8d968fdd 2559 return r;
572b21d9 2560 }
8d968fdd
YW		 2561 }
2562
b9ea3d2e 2563 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2564 r = link_acquire_conf(link);
2565 if (r < 0) {
2566 link_enter_failed(link);
2567 return r;
2568 }
6fc25497 2569
b425c3ae 2570 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2571 r = link_set_static_configs(link);
6fc25497
SS		 2572 if (r < 0)
2573 return r;
9c0a72f9
TG		 2574 }
2575
0d4ad91d
AR		 2576 r = link_handle_bound_by_list(link);
2577 if (r < 0)
2578 return r;
2579
1f241589
YW		 2580 if (!link->bridge_mdb_configured) {
2581 r = link_set_bridge_mdb(link);
2582 if (r < 0)
2583 return r;
2584 }
2585
2586 if (streq_ptr(link->kind, "bridge")) {
2587 Link *slave;
2588
2589 SET_FOREACH(slave, link->slaves) {
2590 if (slave->bridge_mdb_configured)
2591 continue;
2592
2593 r = link_set_bridge_mdb(slave);
2594 if (r < 0)
2595 link_enter_failed(slave);
2596 }
2597 }
3db468ea 2598
9c0a72f9
TG		 2599 return 0;
2600}
2601
2602static int link_carrier_lost(Link *link) {
2603 int r;
2604
2605 assert(link);
2606
25e992ba 2607 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2608 return 0;
2609
fbdb6605 2610 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2611 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2612 * configuration and stop the clients as well. */
97e7fb39
SS		 2613 if (link->setting_mtu)
2614 return 0;
2615
2a99eed0 2616 r = link_stop_engines(link, false);
9c0a72f9
TG		 2617 if (r < 0) {
2618 link_enter_failed(link);
2619 return r;
2620 }
2621
3104883d
SS		 2622 r = link_drop_config(link);
2623 if (r < 0)
2624 return r;
2625
2c7b826d 2626 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 2627 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 2628 r = link_drop_foreign_config(link);
2629 if (r < 0)
2630 return r;
2631 }
3104883d 2632
0d4ad91d
AR		 2633 r = link_handle_bound_by_list(link);
2634 if (r < 0)
2635 return r;
2636
9c0a72f9
TG		 2637 return 0;
2638}
2639
2640int link_carrier_reset(Link *link) {
2641 int r;
2642
2643 assert(link);
2644
2645 if (link_has_carrier(link)) {
2646 r = link_carrier_lost(link);
2647 if (r < 0)
2648 return r;
2649
2650 r = link_carrier_gained(link);
2651 if (r < 0)
2652 return r;
2653
6a7a4e4d 2654 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2655 }
2656
2657 return 0;
2658}
2659
d236718c
DS		 2660/* This is called every time an interface admin state changes to up;
2661 * specifically, when IFF_UP flag changes from unset to set */
2662static int link_admin_state_up(Link *link) {
2663 int r;
2664
2665 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2666 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2667 * ipv6_mtu_set prevents this from trying to set it too early before
2668 * the link->network has been setup; we only need to reset it
2669 * here if we've already set it during normal initialization. */
2670 if (link->ipv6_mtu_set) {
2671 r = link_set_ipv6_mtu(link);
2672 if (r < 0)
2673 return r;
2674 }
2675
2676 return 0;
2677}
2678
1c4baffc 2679int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2680 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2681 hw_addr_data hw_addr;
ca4e095a 2682 const char *ifname;
afe7fd56 2683 uint32_t mtu;
d236718c 2684 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2685 int old_master, r;
22936833 2686
dd3efc09 2687 assert(link);
b8941f74 2688 assert(link->ifname);
22936833
TG		 2689 assert(m);
2690
7619683b 2691 if (link->state == LINK_STATE_LINGER) {
5238e957 2692 log_link_info(link, "Link re-added");
289e6774 2693 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2694
2695 r = link_new_carrier_maps(link);
2696 if (r < 0)
2697 return r;
7619683b
TG		 2698 }
2699
1c4baffc 2700 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2701 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2702 Manager *manager = link->manager;
b8941f74 2703
30de2b89 2704 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2705
30de2b89
YW		 2706 link_drop(link);
2707 r = link_add(manager, m, &link);
2708 if (r < 0)
2709 return r;
b8941f74
TG		 2710 }
2711
572b21d9
YW		 2712 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2713 if (r >= 0)
2714 strv_free_and_replace(link->alternative_names, s);
2715
1c4baffc 2716 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2717 if (r >= 0 && mtu > 0) {
2718 link->mtu = mtu;
4e964aa0 2719 if (link->original_mtu == 0) {
afe7fd56 2720 link->original_mtu = mtu;
6a7a4e4d 2721 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2722 }
2723
2724 if (link->dhcp_client) {
3c9b8860
TG		 2725 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2726 link->mtu);
fc95c359
YW		 2727 if (r < 0)
2728 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2729 }
7465dd22
PF		 2730
2731 if (link->radv) {
2732 r = sd_radv_set_mtu(link->radv, link->mtu);
2733 if (r < 0)
2734 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2735 }
9842de0d 2736 }
69629de9 2737
e9189a1f
TG		 2738 /* The kernel may broadcast NEWLINK messages without the MAC address
2739 set, simply ignore them. */
b8162cd2
TR		 2740 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2741 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2742 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2743
b8162cd2 2744 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2745
b8162cd2 2746 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2747
a3adb4a6
YW		 2748 r = ipv4ll_update_mac(link);
2749 if (r < 0)
2750 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2751
d947f7f9
YW		 2752 r = dhcp4_update_mac(link);
2753 if (r < 0)
2754 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2755
eebba6dc
YW		 2756 r = dhcp6_update_mac(link);
2757 if (r < 0)
2758 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2759
d0c4275c 2760 r = radv_update_mac(link);
be9363cc
YW		 2761 if (r < 0)
2762 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2763
2764 if (link->ndisc) {
b8162cd2 2765 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2766 if (r < 0)
2767 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2768 }
d93d655c
YW		 2769
2770 r = ipv4_dad_update_mac(link);
2771 if (r < 0)
2772 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2773 }
2774
bb262ef0
YW		 2775 old_master = link->master_ifindex;
2776 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2777
d236718c 2778 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2779 had_carrier = link_has_carrier(link);
2780
bb262ef0 2781 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2782 if (r < 0)
2783 return r;
2784
d236718c
DS		 2785 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2786 log_link_info(link, "Link UP");
2787
2788 r = link_admin_state_up(link);
2789 if (r < 0)
2790 return r;
2791 } else if (link_was_admin_up && !(link->flags & IFF_UP))
2792 log_link_info(link, "Link DOWN");
2793
273eec24
LP		 2794 r = link_update_lldp(link);
2795 if (r < 0)
2796 return r;
2797
a61bb41c
TG		 2798 carrier_gained = !had_carrier && link_has_carrier(link);
2799 carrier_lost = had_carrier && !link_has_carrier(link);
2800
2801 if (carrier_gained) {
6a7a4e4d 2802 log_link_info(link, "Gained carrier");
a61bb41c 2803
9c0a72f9
TG		 2804 r = link_carrier_gained(link);
2805 if (r < 0)
2806 return r;
a61bb41c 2807 } else if (carrier_lost) {
6a7a4e4d 2808 log_link_info(link, "Lost carrier");
a61bb41c 2809
9c0a72f9
TG		 2810 r = link_carrier_lost(link);
2811 if (r < 0)
a61bb41c 2812 return r;
a61bb41c
TG		 2813 }
2814
2815 return 0;
dd3efc09 2816}
fe8db0c5 2817
b295beea
LP		 2818static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
2819 bool space = false;
b295beea
LP		 2820 Link *link;
2821
2822 assert(f);
2823 assert(prefix);
2824
2825 if (hashmap_isempty(h))
2826 return;
2827
0d536673 2828 fputs(prefix, f);
90e74a66 2829 HASHMAP_FOREACH(link, h) {
b295beea 2830 if (space)
0d536673 2831 fputc(' ', f);
b295beea
LP		 2832
2833 fprintf(f, "%i", link->ifindex);
2834 space = true;
2835 }
2836
0d536673 2837 fputc('\n', f);
b295beea
LP		 2838}
2839
64581765 2840static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 2841 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 2842 const char *str;
15761549 2843
64581765
YW		 2844 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
2845 continue;
2846
e77bd3fd
YW		 2847 str = in_addr_full_to_string(dns[j]);
2848 if (!str)
15761549 2849 continue;
15761549
YW		 2850
2851 if (*space)
2852 fputc(' ', f);
e77bd3fd 2853 fputs(str, f);
15761549
YW		 2854 *space = true;
2855 }
2856}
2857
d5e172d2
ZJS		 2858static void serialize_addresses(
2859 FILE *f,
2860 const char *lvalue,
2861 bool *space,
2862 char **addresses,
2863 sd_dhcp_lease *lease,
2864 bool conditional,
ddb82ec2 2865 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 2866 sd_dhcp6_lease *lease6,
2867 bool conditional6,
2868 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
2869 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
2870 int r;
2871
2872 bool _space = false;
2873 if (!space)
2874 space = &_space;
2875
2876 if (lvalue)
2877 fprintf(f, "%s=", lvalue);
2878 fputstrv(f, addresses, NULL, space);
2879
2880 if (lease && conditional) {
2881 const struct in_addr *lease_addresses;
2882
2883 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
2884 if (r > 0)
d8bff5cc 2885 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 2886 }
2887
2888 if (lease6 && conditional6 && lease6_get_addr) {
2889 const struct in6_addr *in6_addrs;
2890
2891 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 2892 if (r > 0)
2893 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 2894 }
2895
2896 if (lease6 && conditional6 && lease6_get_fqdn) {
2897 char **in6_hosts;
2898
2899 r = lease6_get_fqdn(lease6, &in6_hosts);
2900 if (r > 0)
2901 fputstrv(f, in6_hosts, NULL, space);
2902 }
2903
2904 if (lvalue)
2905 fputc('\n', f);
2906}
2907
fe8db0c5 2908int link_save(Link *link) {
d361b373 2909 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 2910 _cleanup_free_ char *temp_path = NULL;
fe8db0c5
TG		 2911 _cleanup_fclose_ FILE *f = NULL;
2912 int r;
2913
2914 assert(link);
2915 assert(link->state_file);
68a8723c 2916 assert(link->lease_file);
bbf7c048
TG		 2917 assert(link->manager);
2918
370e9930 2919 if (link->state == LINK_STATE_LINGER) {
6990fb6b 2920 (void) unlink(link->state_file);
370e9930
TG		 2921 return 0;
2922 }
2923
34437b4f
LP		 2924 link_lldp_save(link);
2925
deb2e523
TG		 2926 admin_state = link_state_to_string(link->state);
2927 assert(admin_state);
2928
e375dcde
TG		 2929 oper_state = link_operstate_to_string(link->operstate);
2930 assert(oper_state);
deb2e523 2931
ac999bf0
YW		 2932 carrier_state = link_carrier_state_to_string(link->carrier_state);
2933 assert(carrier_state);
2934
2935 address_state = link_address_state_to_string(link->address_state);
2936 assert(address_state);
2937
fe8db0c5
TG		 2938 r = fopen_temporary(link->state_file, &f, &temp_path);
2939 if (r < 0)
6a7a4e4d 2940 goto fail;
fe8db0c5 2941
5512a963 2942 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 2943
2944 fprintf(f,
2945 "# This is private data. Do not parse.\n"
deb2e523 2946 "ADMIN_STATE=%s\n"
ac999bf0
YW		 2947 "OPER_STATE=%s\n"
2948 "CARRIER_STATE=%s\n"
2949 "ADDRESS_STATE=%s\n",
2950 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 2951
bcb7a07e 2952 if (link->network) {
fe0e16db
YW		 2953 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
2954 const char *dhcp_domainname = NULL, *p;
fe0e16db 2955 bool space;
07bdc70d 2956
c1a38904
MTL		 2957 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
2958 yes_no(link->network->required_for_online));
2959
d5e172d2
ZJS		 2960 LinkOperationalStateRange st = link->network->required_operstate_for_online;
2961 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
2962 strempty(link_operstate_to_string(st.min)),
2963 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
2964 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 2965
adc5b2e2
TG		 2966 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
2967
d5e172d2
ZJS		 2968 /************************************************************/
2969
0d536673 2970 fputs("DNS=", f);
ea352b40 2971 space = false;
15761549 2972 if (link->n_dns != (unsigned) -1)
64581765 2973 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 2974 else
64581765 2975 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 2976
d5e172d2
ZJS		 2977 serialize_addresses(f, NULL, &space,
2978 NULL,
2979 link->dhcp_lease,
2980 link->network->dhcp_use_dns,
ddb82ec2 2981 SD_DHCP_LEASE_DNS,
1633c457 2982 link->dhcp6_lease,
d5e172d2
ZJS		 2983 link->network->dhcp6_use_dns,
2984 sd_dhcp6_lease_get_dns,
2985 NULL);
1e7a0e21 2986
a8c10331 2987 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 2988 ndisc_vacuum(link);
2989
b296797f 2990 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 2991 NDiscRDNSS *dd;
2992
90e74a66 2993 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 2994 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 2995 }
2996
2997 fputc('\n', f);
2998
d5e172d2
ZJS		 2999 /************************************************************/
3000
3001 serialize_addresses(f, "NTP", NULL,
3002 link->ntp ?: link->network->ntp,
3003 link->dhcp_lease,
3004 link->network->dhcp_use_ntp,
ddb82ec2 3005 SD_DHCP_LEASE_NTP,
1633c457 3006 link->dhcp6_lease,
d5e172d2
ZJS		 3007 link->network->dhcp6_use_ntp,
3008 sd_dhcp6_lease_get_ntp_addrs,
3009 sd_dhcp6_lease_get_ntp_fqdn);
3010
3011 serialize_addresses(f, "SIP", NULL,
2a71d57f 3012 NULL,
d5e172d2
ZJS		 3013 link->dhcp_lease,
3014 link->network->dhcp_use_sip,
ddb82ec2 3015 SD_DHCP_LEASE_SIP,
2a71d57f 3016 NULL, false, NULL, NULL);
d5e172d2
ZJS		 3017
3018 /************************************************************/
bd8f6538 3019
b2a81c0b 3020 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 3021 if (link->dhcp_lease) {
b2a81c0b 3022 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 3023 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
3024 }
1633c457
YW		 3025 if (link->dhcp6_lease)
3026 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 3027 }
3028
fe0e16db
YW		 3029 fputs("DOMAINS=", f);
3030 space = false;
90e74a66 3031 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 3032 fputs_with_space(f, p, NULL, &space);
07bdc70d 3033
1e7a0e21 3034 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 3035 if (dhcp_domainname)
3036 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3037 if (dhcp_domains)
3038 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3039 if (dhcp6_domains)
3040 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3041 }
3042
3043 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
3044 NDiscDNSSL *dd;
1e7a0e21 3045
90e74a66 3046 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3047 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3048 }
b2a81c0b 3049
0d536673 3050 fputc('\n', f);
6192b846 3051
d5e172d2
ZJS		 3052 /************************************************************/
3053
fe0e16db
YW		 3054 fputs("ROUTE_DOMAINS=", f);
3055 space = false;
90e74a66 3056 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 3057 fputs_with_space(f, p, NULL, &space);
b2a81c0b 3058
1e7a0e21 3059 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 3060 if (dhcp_domainname)
3061 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 3062 if (dhcp_domains)
3063 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 3064 if (dhcp6_domains)
3065 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 3066 }
3067
3068 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
3069 NDiscDNSSL *dd;
1e7a0e21 3070
90e74a66 3071 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 3072 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
3073 }
b2a81c0b 3074
0d536673 3075 fputc('\n', f);
67272d15 3076
d5e172d2
ZJS		 3077 /************************************************************/
3078
3c9b8860 3079 fprintf(f, "LLMNR=%s\n",
15761549 3080 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 3081
3082 /************************************************************/
3083
aaa297d4 3084 fprintf(f, "MDNS=%s\n",
15761549 3085 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 3086
d5e172d2
ZJS		 3087 /************************************************************/
3088
3089 int dns_default_route =
3090 link->dns_default_route >= 0 ? link->dns_default_route :
3091 link->network->dns_default_route;
3092 if (dns_default_route >= 0)
3093 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
3094
3095 /************************************************************/
3096
3097 DnsOverTlsMode dns_over_tls_mode =
3098 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
3099 link->network->dns_over_tls_mode;
3100 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
3101 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
3102
3103 /************************************************************/
3104
3105 DnssecMode dnssec_mode =
3106 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
3107 link->network->dnssec_mode;
3108 if (dnssec_mode != _DNSSEC_MODE_INVALID)
3109 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
3110
3111 /************************************************************/
3112
3113 Set *nta_anchors = link->dnssec_negative_trust_anchors;
3114 if (set_isempty(nta_anchors))
3115 nta_anchors = link->network->dnssec_negative_trust_anchors;
3116
3117 if (!set_isempty(nta_anchors)) {
8a516214
LP		 3118 const char *n;
3119
0d536673 3120 fputs("DNSSEC_NTA=", f);
8a516214 3121 space = false;
90e74a66 3122 SET_FOREACH(n, nta_anchors)
d390f8ef 3123 fputs_with_space(f, n, NULL, &space);
0d536673 3124 fputc('\n', f);
8a516214 3125 }
bcb7a07e 3126 }
7374f9d8 3127
b295beea
LP		 3128 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
3129 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 3130
8eb9058d 3131 if (link->dhcp_lease) {
bd91b83e 3132 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 3133 if (r < 0)
c2d6bd61 3134 goto fail;
fe8db0c5 3135
7374f9d8 3136 fprintf(f,
b0e39c82
TG		 3137 "DHCP_LEASE=%s\n",
3138 link->lease_file);
deb2e523 3139 } else
6990fb6b 3140 (void) unlink(link->lease_file);
fe8db0c5 3141
5460bde5
YW		 3142 r = link_serialize_dhcp6_client(link, f);
3143 if (r < 0)
3144 goto fail;
18d8a2cf 3145
c2d6bd61
LP		 3146 r = fflush_and_check(f);
3147 if (r < 0)
3148 goto fail;
fe8db0c5 3149
c2d6bd61 3150 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 3151 r = -errno;
c2d6bd61 3152 goto fail;
fe8db0c5
TG		 3153 }
3154
c2d6bd61 3155 return 0;
dacd6cee 3156
c2d6bd61 3157fail:
6a7a4e4d 3158 (void) unlink(link->state_file);
6a7a4e4d
LP		 3159 if (temp_path)
3160 (void) unlink(temp_path);
3161
dacd6cee 3162 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 3163}
3164
84de38c5
TG		 3165/* The serialized state in /run is no longer up-to-date. */
3166void link_dirty(Link *link) {
3167 int r;
3168
3169 assert(link);
3170
0c241a37
SS		 3171 /* mark manager dirty as link is dirty */
3172 manager_dirty(link->manager);
3173
de7fef4b 3174 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 3175 if (r <= 0)
de7fef4b 3176 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 3177 return;
84de38c5
TG		 3178 link_ref(link);
3179}
3180
3181/* The serialized state in /run is up-to-date */
3182void link_clean(Link *link) {
3183 assert(link);
3184 assert(link->manager);
3185
1046bf9b 3186 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 3187}
3188
c2a65950
YW		 3189int link_save_and_clean(Link *link) {
3190 int r;
3191
3192 r = link_save(link);
3193 if (r < 0)
3194 return r;
3195
3196 link_clean(link);
3197 return 0;
3198}
3199
fe8db0c5 3200static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3201 [LINK_STATE_PENDING] = "pending",
bd08ce56 3202 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3203 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3204 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3205 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3206 [LINK_STATE_FAILED] = "failed",
370e9930 3207 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3208};
3209
3210DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 3211
3212int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
3213 const char *err_msg = NULL;
3214
3215 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 3216 return log_link_full_errno(link, level, err,
3217 "%s: %s%s%s%m",
3218 msg,
3219 strempty(err_msg),
3220 err_msg && !endswith(err_msg, ".") ? "." : "",
3221 err_msg ? " " : "");
5ecb131d 3222}
Unnamed repository; edit this file 'description' to name the repository.