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network: introduce link_request_to_set_master()
[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>
8430841b 7#include <sys/socket.h>
4cc7a82c 8#include <unistd.h>
f579559b 9
b5efdb8a 10#include "alloc-util.h"
c0267a59 11#include "batadv.h"
737f1405
YW		 12#include "bond.h"
13#include "bridge.h"
1346b1f0 14#include "bus-util.h"
3be9d62a
YW		 15#include "device-private.h"
16#include "device-util.h"
27dfc982 17#include "dhcp-identifier.h"
bd91b83e 18#include "dhcp-lease-internal.h"
686d13b9 19#include "env-file.h"
4bb7cc82 20#include "ethtool-util.h"
3ffd4af2 21#include "fd-util.h"
cf1d700d 22#include "fileio.h"
af664001 23#include "fs-util.h"
737f1405 24#include "ipvlan.h"
ef118d00 25#include "missing_network.h"
cf1d700d 26#include "netlink-util.h"
c6f7c917 27#include "network-internal.h"
fb486c90 28#include "networkd-address-label.h"
093e3533 29#include "networkd-address.h"
9671ae9d 30#include "networkd-bridge-fdb.h"
ff9e0783 31#include "networkd-bridge-mdb.h"
3ddcbeea 32#include "networkd-can.h"
8fcf1d61 33#include "networkd-dhcp-server.h"
ca5ad760
YW		 34#include "networkd-dhcp4.h"
35#include "networkd-dhcp6.h"
36#include "networkd-ipv4ll.h"
76c5a0f2 37#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 38#include "networkd-link-bus.h"
39#include "networkd-link.h"
8e1ad1ea 40#include "networkd-lldp-tx.h"
23f53b99 41#include "networkd-manager.h"
1e7a0e21 42#include "networkd-ndisc.h"
e4a71bf3 43#include "networkd-neighbor.h"
75156ccb 44#include "networkd-nexthop.h"
19d9a5ad 45#include "networkd-queue.h"
7465dd22 46#include "networkd-radv.h"
bce67bbe 47#include "networkd-routing-policy-rule.h"
0fa8ee6c 48#include "networkd-setlink.h"
19d9a5ad 49#include "networkd-sriov.h"
3b5a4fc6 50#include "networkd-state-file.h"
19d9a5ad 51#include "networkd-sysctl.h"
8d968fdd 52#include "networkd-wifi.h"
cf1d700d
TG		 53#include "set.h"
54#include "socket-util.h"
bf331d87 55#include "stat-util.h"
15a5e950 56#include "stdio-util.h"
8b43440b 57#include "string-table.h"
51517f9e 58#include "strv.h"
34658df2 59#include "tc.h"
e4de7287 60#include "tmpfile-util.h"
299ad32d 61#include "udev-util.h"
cf1d700d 62#include "util.h"
737f1405 63#include "vrf.h"
fc2f9534 64
3ca1fab7 65bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
500b96eb 74 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 75 return false;
76
98d20a17 77 if (STRPTR_IN_SET(link->kind,
78 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 79 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 80 return false;
81
f410d463
YW		 82 /* L3 or L3S mode do not support ARP. */
83 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
84 return false;
85
f2bfcdb9
YW		 86 if (link->network->bond)
87 return false;
88
3ca1fab7 89 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 90}
91
f8f2f880 92bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
500b96eb 104 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 105 return false;
106
107 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 108 return false;
109
f2bfcdb9
YW		 110 if (link->network->bond)
111 return false;
112
e0ee46f2 113 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
5e0534f1 116bool link_ipv6_enabled(Link *link) {
439689c6
SS		 117 assert(link);
118
119 if (!socket_ipv6_is_supported())
120 return false;
121
b102cdca 122 if (link->network->bond)
2b00a4e0
TY		 123 return false;
124
500b96eb 125 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 126 return false;
127
4cef7fe3 128 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 129 if (link_ipv6ll_enabled(link))
130 return true;
131
132 if (network_has_static_ipv6_configurations(link->network))
133 return true;
134
135 return false;
439689c6
SS		 136}
137
7191a57a
YW		 138bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
139 assert(link);
140
8e4b1b35 141 if (!link->network) {
7191a57a
YW		 142 if (!allow_unmanaged)
143 return false;
144
145 return link_has_carrier(link);
146 }
147
148 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
149 return false;
150
151 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
152 return false;
153
0fa8ee6c
YW		 154 if (link->set_link_messages > 0)
155 return false;
156
7191a57a
YW		 157 return true;
158}
159
34bf3c00
YW		 160static bool link_is_enslaved(Link *link) {
161 if (link->flags & IFF_SLAVE)
162 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
163 return true;
164
34bf3c00
YW		 165 if (!link->network)
166 return false;
167
bb262ef0 168 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 169 return true;
170
bb262ef0
YW		 171 /* TODO: add conditions for other netdevs. */
172
34bf3c00
YW		 173 return false;
174}
175
45e11abf
YW		 176static void link_update_master_operstate(Link *link, NetDev *netdev) {
177 Link *master;
178
179 if (!netdev)
180 return;
181
7936917e
YW		 182 if (netdev->ifindex <= 0)
183 return;
184
e8f99f4e
YW		 185 /* If an interface is self-mentioned in Bridge= or friends, then it introduces an infinite loop.
186 * FIXME: there still exits a possibility of an infinite loop when two or more interfaces
187 * mention each other in Bridge= or so. We need to detect such a loop. */
188 if (link->ifindex == netdev->ifindex)
189 return;
190
45e11abf
YW		 191 if (link_get(link->manager, netdev->ifindex, &master) < 0)
192 return;
193
194 link_update_operstate(master, true);
195}
196
8430841b
L		 197static LinkAddressState address_state_from_scope(uint8_t scope) {
198 if (scope < RT_SCOPE_SITE)
199 /* universally accessible addresses found */
200 return LINK_ADDRESS_STATE_ROUTABLE;
201
202 if (scope < RT_SCOPE_HOST)
203 /* only link or site local addresses found */
204 return LINK_ADDRESS_STATE_DEGRADED;
205
206 /* no useful addresses found */
207 return LINK_ADDRESS_STATE_OFF;
208}
209
45e11abf 210void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 211 LinkOperationalState operstate;
1678fbb3 212 LinkCarrierState carrier_state;
8430841b 213 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
bcdcc596 214 LinkOnlineState online_state;
35c5a9ca 215 _cleanup_strv_free_ char **p = NULL;
90afec18 216 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 217 bool changed = false;
1678fbb3 218 Address *address;
14153d1b 219
84de38c5
TG		 220 assert(link);
221
222 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 223 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 224 else if (link_has_carrier(link)) {
1678fbb3
YW		 225 if (link_is_enslaved(link))
226 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 227 else
1678fbb3 228 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 229 } else if (link->flags & IFF_UP)
1678fbb3 230 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 231 else
1678fbb3 232 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 233
1678fbb3 234 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 235 Link *slave;
236
90e74a66 237 SET_FOREACH(slave, link->slaves) {
959f65d3 238 link_update_operstate(slave, false);
84de38c5 239
1678fbb3
YW		 240 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
241 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 242 }
959f65d3 243 }
84de38c5 244
90e74a66 245 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 246 if (!address_is_ready(address))
247 continue;
84de38c5 248
90afec18
YW		 249 if (address->family == AF_INET)
250 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 251
90afec18
YW		 252 if (address->family == AF_INET6)
253 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 254 }
84de38c5 255
1678fbb3 256 /* for operstate we also take foreign addresses into account */
90e74a66 257 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 258 if (!address_is_ready(address))
259 continue;
260
90afec18
YW		 261 if (address->family == AF_INET)
262 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 263
90afec18
YW		 264 if (address->family == AF_INET6)
265 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 266 }
267
8430841b
L		 268 ipv4_address_state = address_state_from_scope(ipv4_scope);
269 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 270 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 271
272 /* Mapping of address and carrier state vs operational state
273 * carrier state
274 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
275 * ------------------------------------------------------------------------------
276 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
277 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
278 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
279 */
84de38c5 280
1678fbb3
YW		 281 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
282 operstate = (LinkOperationalState) carrier_state;
283 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
284 operstate = LINK_OPERSTATE_ROUTABLE;
285 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
286 operstate = LINK_OPERSTATE_DEGRADED;
287 else
14153d1b
YW		 288 operstate = LINK_OPERSTATE_ENSLAVED;
289
bcdcc596
AŠ		 290 /* Only determine online state for managed links with RequiredForOnline=yes */
291 if (!link->network || !link->network->required_for_online)
292 online_state = _LINK_ONLINE_STATE_INVALID;
293 else if (operstate < link->network->required_operstate_for_online.min ||
294 operstate > link->network->required_operstate_for_online.max)
295 online_state = LINK_ONLINE_STATE_OFFLINE;
296 else {
297 AddressFamily required_family = link->network->required_family_for_online;
298 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
299 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
300
301 /* The operational state is within the range required for online.
302 * If a particular address family is also required, we might revert
303 * to offline in the blocks below.
304 */
305 online_state = LINK_ONLINE_STATE_ONLINE;
306
307 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
308 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
309 online_state = LINK_ONLINE_STATE_OFFLINE;
310 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
311 online_state = LINK_ONLINE_STATE_OFFLINE;
312 }
313
314 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
315 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
316 online_state = LINK_ONLINE_STATE_OFFLINE;
317 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
318 online_state = LINK_ONLINE_STATE_OFFLINE;
319 }
320 }
321
35c5a9ca
YW		 322 if (link->carrier_state != carrier_state) {
323 link->carrier_state = carrier_state;
324 changed = true;
325 if (strv_extend(&p, "CarrierState") < 0)
326 log_oom();
327 }
959f65d3 328
35c5a9ca
YW		 329 if (link->address_state != address_state) {
330 link->address_state = address_state;
331 changed = true;
332 if (strv_extend(&p, "AddressState") < 0)
333 log_oom();
959f65d3
YW		 334 }
335
8430841b
L		 336 if (link->ipv4_address_state != ipv4_address_state) {
337 link->ipv4_address_state = ipv4_address_state;
338 changed = true;
339 if (strv_extend(&p, "IPv4AddressState") < 0)
340 log_oom();
341 }
342
343 if (link->ipv6_address_state != ipv6_address_state) {
344 link->ipv6_address_state = ipv6_address_state;
345 changed = true;
346 if (strv_extend(&p, "IPv6AddressState") < 0)
347 log_oom();
348 }
349
84de38c5
TG		 350 if (link->operstate != operstate) {
351 link->operstate = operstate;
35c5a9ca
YW		 352 changed = true;
353 if (strv_extend(&p, "OperationalState") < 0)
354 log_oom();
84de38c5 355 }
959f65d3 356
bcdcc596
AŠ		 357 if (link->online_state != online_state) {
358 link->online_state = online_state;
359 changed = true;
360 if (strv_extend(&p, "OnlineState") < 0)
361 log_oom();
362 }
363
35c5a9ca
YW		 364 if (p)
365 link_send_changed_strv(link, p);
366 if (changed)
367 link_dirty(link);
368
45e11abf 369 if (also_update_master && link->network) {
c0267a59 370 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 371 link_update_master_operstate(link, link->network->bond);
372 link_update_master_operstate(link, link->network->bridge);
959f65d3 373 }
84de38c5
TG		 374}
375
51d18171
TG		 376#define FLAG_STRING(string, flag, old, new) \
377 (((old ^ new) & flag) \
378 ? ((old & flag) ? (" -" string) : (" +" string)) \
379 : "")
380
bb262ef0 381static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 382 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
383 uint8_t operstate;
384 int r;
385
386 assert(link);
387
388 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 389 if (r < 0)
390 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 391
1c4baffc 392 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 393 if (r < 0)
394 /* if we got a message without operstate, take it to mean
395 the state was unchanged */
396 operstate = link->kernel_operstate;
397
bb262ef0 398 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 399 return 0;
400
401 if (link->flags != flags) {
6a7a4e4d 402 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		 403 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
404 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
405 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
406 FLAG_STRING("UP", IFF_UP, link->flags, flags),
407 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
408 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
409 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
410 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
411 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
412 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
413 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
414 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
415 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
416 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
417 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
418 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
419 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
420 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
421 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
422
423 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
424 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
425 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
426 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
427 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
428 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
429 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
430 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
431
432 /* link flags are currently at most 18 bits, let's align to
433 * printing 20 */
434 if (unknown_flags_added)
79008bdd 435 log_link_debug(link,
6a7a4e4d 436 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 437 unknown_flags_added);
438
439 if (unknown_flags_removed)
79008bdd 440 log_link_debug(link,
6a7a4e4d 441 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 442 unknown_flags_removed);
443 }
444
445 link->flags = flags;
446 link->kernel_operstate = operstate;
447
959f65d3 448 link_update_operstate(link, true);
51d18171
TG		 449
450 return 0;
451}
452
15761549
YW		 453void link_ntp_settings_clear(Link *link) {
454 link->ntp = strv_free(link->ntp);
455}
456
457void link_dns_settings_clear(Link *link) {
f5fbe71d 458 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 459 for (unsigned i = 0; i < link->n_dns; i++)
460 in_addr_full_free(link->dns[i]);
15761549 461 link->dns = mfree(link->dns);
f5fbe71d 462 link->n_dns = UINT_MAX;
15761549 463
6e4571f0
YW		 464 link->search_domains = ordered_set_free(link->search_domains);
465 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 466
467 link->dns_default_route = -1;
468 link->llmnr = _RESOLVE_SUPPORT_INVALID;
469 link->mdns = _RESOLVE_SUPPORT_INVALID;
470 link->dnssec_mode = _DNSSEC_MODE_INVALID;
471 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
472
473 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
474}
475
1a6bb31f
YW		 476static void link_free_engines(Link *link) {
477 if (!link)
478 return;
479
480 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
481 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
482 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 483 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 484
485 link->lldp = sd_lldp_unref(link->lldp);
1c494872 486 link_lldp_emit_stop(link);
1a6bb31f
YW		 487
488 ndisc_flush(link);
489
490 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
491 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 492 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 493 link->ndisc = sd_ndisc_unref(link->ndisc);
494 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 495
496 ipv4_dad_unref(link);
1a6bb31f
YW		 497}
498
8301aa0b 499static Link *link_free(Link *link) {
8301aa0b 500 assert(link);
f579559b 501
15761549
YW		 502 link_ntp_settings_clear(link);
503 link_dns_settings_clear(link);
504
8eec0b9d
YW		 505 link->routes = set_free(link->routes);
506 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 507 link->dhcp_routes = set_free(link->dhcp_routes);
508 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 509 link->dhcp6_routes = set_free(link->dhcp6_routes);
510 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
511 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
512 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 513 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 514
8eec0b9d
YW		 515 link->nexthops = set_free(link->nexthops);
516 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 517
8eec0b9d
YW		 518 link->neighbors = set_free(link->neighbors);
519 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 520
8eec0b9d
YW		 521 link->addresses = set_free(link->addresses);
522 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 523 link->pool_addresses = set_free(link->pool_addresses);
e5526518 524 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 525 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
526 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
527 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
528 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 529 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 530
4b409e85
YW		 531 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
532
1a6bb31f 533 link_free_engines(link);
49699bac 534
c166a070 535 free(link->ifname);
572b21d9 536 strv_free(link->alternative_names);
ceac4078 537 free(link->kind);
8d968fdd 538 free(link->ssid);
c643bda5 539 free(link->driver);
6cad256d 540
a34e58d4
YW		 541 unlink_and_free(link->lease_file);
542 unlink_and_free(link->lldp_file);
543 unlink_and_free(link->state_file);
c166a070 544
51517f9e 545 sd_device_unref(link->sd_device);
b5db00e5 546
0d4ad91d 547 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 548 hashmap_free(link->bound_by_links);
549
5f707e12 550 set_free_with_destructor(link->slaves, link_unref);
033295c1 551
c9c908a6
YW		 552 network_unref(link->network);
553
8301aa0b 554 return mfree(link);
14b746f7
TG		 555}
556
8301aa0b 557DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 558
11a7f229
TG		 559int link_get(Manager *m, int ifindex, Link **ret) {
560 Link *link;
11a7f229
TG		 561
562 assert(m);
e856ed00 563 assert(ifindex > 0);
11a7f229 564
ae06ab10 565 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 566 if (!link)
567 return -ENODEV;
568
0b54c870
YW		 569 if (ret)
570 *ret = link;
571 return 0;
572}
573
574int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
575 Link *link;
576
577 assert(m);
578 assert(ifname);
11a7f229 579
0b54c870
YW		 580 link = hashmap_get(m->links_by_name, ifname);
581 if (!link)
582 return -ENODEV;
583
584 if (ret)
585 *ret = link;
11a7f229
TG		 586 return 0;
587}
588
af9ba57a 589void link_set_state(Link *link, LinkState state) {
e331e246
TG		 590 assert(link);
591
592 if (link->state == state)
593 return;
594
0beb9542
YW		 595 log_link_debug(link, "State changed: %s -> %s",
596 link_state_to_string(link->state),
597 link_state_to_string(state));
598
e331e246
TG		 599 link->state = state;
600
601 link_send_changed(link, "AdministrativeState", NULL);
9092113d 602 link_dirty(link);
e331e246
TG		 603}
604
57bd6899
TG		 605static void link_enter_unmanaged(Link *link) {
606 assert(link);
607
e331e246 608 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 609}
610
2a99eed0 611int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 612 int r = 0, k;
613
614 assert(link);
615 assert(link->manager);
616 assert(link->manager->event);
617
80060352
ZJS		 618 bool keep_dhcp = may_keep_dhcp &&
619 link->network &&
620 (link->manager->restarting ||
621 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
622
84add3cd 623 if (!keep_dhcp) {
111bb8f9 624 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 625 if (k < 0)
36c7d709 626 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 627 }
628
84add3cd
YW		 629 k = sd_ipv4acd_stop(link->dhcp_acd);
630 if (k < 0)
631 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 632
2a99eed0
YW		 633 k = sd_dhcp_server_stop(link->dhcp_server);
634 if (k < 0)
635 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
636
9cc65242
YW		 637 k = sd_lldp_stop(link->lldp);
638 if (k < 0)
639 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
640
84add3cd
YW		 641 k = sd_ipv4ll_stop(link->ipv4ll);
642 if (k < 0)
643 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 644
490ccbd5 645 k = ipv4_dad_stop(link);
2488e4d9
YW		 646 if (k < 0)
647 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 648
84add3cd
YW		 649 k = sd_dhcp6_client_stop(link->dhcp6_client);
650 if (k < 0)
651 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 652
2ffd6d73
YW		 653 k = dhcp6_pd_remove(link);
654 if (k < 0)
655 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 656
84add3cd
YW		 657 k = sd_ndisc_stop(link->ndisc);
658 if (k < 0)
659 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 660
84add3cd
YW		 661 k = sd_radv_stop(link->radv);
662 if (k < 0)
663 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 664
7272b25e 665 link_lldp_emit_stop(link);
111bb8f9
TG		 666 return r;
667}
668
b22d8a00 669void link_enter_failed(Link *link) {
ef1ba606 670 assert(link);
f882c247 671
370e9930 672 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 673 return;
674
6a7a4e4d 675 log_link_warning(link, "Failed");
449f7554 676
e331e246 677 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 678
2a99eed0 679 (void) link_stop_engines(link, false);
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 719 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 720}
721
6accfd31
DA		 722void link_check_ready(Link *link) {
723 Address *a;
6accfd31
DA		 724
725 assert(link);
726
5f58af25
YW		 727 if (link->state == LINK_STATE_CONFIGURED)
728 return;
729
d19b9939
YW		 730 if (link->state != LINK_STATE_CONFIGURING)
731 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 732
733 if (!link->network)
734 return;
735
600b7898
YW		 736 if (link->iftype == ARPHRD_CAN) {
737 /* let's shortcut things for CAN which doesn't need most of checks below. */
738 if (!link->can_configured)
739 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
740
741 link_enter_configured(link);
742 return;
743 }
744
76c5a0f2 745 if (!link->static_addresses_configured)
d19b9939 746 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 747
90e74a66 748 SET_FOREACH(a, link->addresses)
39373cb9
YW		 749 if (!address_is_ready(a)) {
750 _cleanup_free_ char *str = NULL;
751
5380707a
YW		 752 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
753 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 754 }
6aa5773b 755
354bc760
YW		 756 if (!link->static_address_labels_configured)
757 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
758
e5b35bf6
YW		 759 if (!link->static_bridge_fdb_configured)
760 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
761
ff9e0783
YW		 762 if (!link->static_bridge_mdb_configured)
763 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
764
fdeba3f5
YW		 765 if (!link->static_ipv6_proxy_ndp_configured)
766 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
767
40ca350e
YW		 768 if (!link->static_neighbors_configured)
769 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
770
d19b9939
YW		 771 if (!link->static_nexthops_configured)
772 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 773
76c5a0f2
YW		 774 if (!link->static_routes_configured)
775 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
776
0e5ef6be 777 if (!link->static_routing_policy_rules_configured)
d19b9939 778 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 779
d19b9939
YW		 780 if (!link->tc_configured)
781 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 782
d19b9939
YW		 783 if (!link->sr_iov_configured)
784 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 785
463797c1 786 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 787 bool has_ndisc_address = false;
788 NDiscAddress *n;
6accfd31 789
94876904
YW		 790 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
791 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 792
90e74a66 793 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 794 if (!n->marked) {
795 has_ndisc_address = true;
796 break;
797 }
798
8cd37e43 799 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 800 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 801 !link->ipv4ll_address_configured)
802 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
803 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 804
0d0799da
YW		 805 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
806 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 807 if (!link->dhcp4_configured &&
808 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
809 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 810 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 811 !link->ipv4ll_address_configured)
812 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 813 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 814
0d0799da 815 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		 816 __func__,
817 yes_no(link->dhcp4_configured),
0d0799da 818 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 819 yes_no(link->dhcp6_address_configured),
820 yes_no(link->dhcp6_route_configured),
821 yes_no(link->dhcp6_pd_address_configured),
822 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 823 yes_no(link->ndisc_addresses_configured),
824 yes_no(link->ndisc_routes_configured));
39373cb9 825 }
463797c1 826 }
6accfd31 827
5f58af25 828 link_enter_configured(link);
6accfd31
DA		 829}
830
97108953 831static int link_request_static_configs(Link *link) {
f882c247
TG		 832 int r;
833
834 assert(link);
835 assert(link->network);
f5be5601 836 assert(link->state != _LINK_STATE_INVALID);
f882c247 837
354bc760 838 r = link_request_static_addresses(link);
0e5ef6be
YW		 839 if (r < 0)
840 return r;
841
354bc760 842 r = link_request_static_address_labels(link);
f3ef324d
YW		 843 if (r < 0)
844 return r;
e4a71bf3 845
e5b35bf6
YW		 846 r = link_request_static_bridge_fdb(link);
847 if (r < 0)
848 return r;
849
9a038aac
YW		 850 r = link_request_static_bridge_mdb(link);
851 if (r < 0)
852 return r;
853
fdeba3f5
YW		 854 r = link_request_static_ipv6_proxy_ndp_addresses(link);
855 if (r < 0)
856 return r;
857
40ca350e 858 r = link_request_static_neighbors(link);
682c65b0
YW		 859 if (r < 0)
860 return r;
bd6379ec 861
76c5a0f2 862 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 863 if (r < 0)
864 return r;
f882c247 865
76c5a0f2
YW		 866 r = link_request_static_routes(link, false);
867 if (r < 0)
868 return r;
869
870 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 871 if (r < 0)
872 return r;
d4cdbea5 873
f882c247
TG		 874 return 0;
875}
876
e16e4b3b
DS		 877static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
878 int r;
879
880 assert(link);
881
882 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
883 return 1;
884
885 r = sd_netlink_message_get_errno(m);
886 if (r < 0)
887 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
888 else
889 log_link_debug(link, "Setting nomaster done.");
890
891 return 1;
892}
893
894static int link_set_nomaster(Link *link) {
895 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
896 int r;
897
898 assert(link);
899 assert(link->network);
900 assert(link->manager);
901 assert(link->manager->rtnl);
902
903 /* set it free if not enslaved with networkd */
c0267a59 904 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 905 return 0;
906
907 log_link_debug(link, "Setting nomaster");
908
909 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
910 if (r < 0)
911 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
912
913 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
914 if (r < 0)
915 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
916
917 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
918 link_netlink_destroy_callback, link);
919 if (r < 0)
920 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
921
922 link_ref(link);
923
924 return 0;
925}
926
8566df79 927static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 928 int r;
929
930 assert(link);
931
086b8853 932 if (link->radv) {
7465dd22 933 assert(link->radv);
94876904 934 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 935
936 log_link_debug(link, "Starting IPv6 Router Advertisements");
937
fd3ef936
YW		 938 r = radv_emit_dns(link);
939 if (r < 0)
940 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
941
7465dd22
PF		 942 r = sd_radv_start(link->radv);
943 if (r < 0 && r != -EBUSY)
944 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
945 }
946
294f129b
YW		 947 r = ndisc_start(link);
948 if (r < 0)
949 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 950
294f129b
YW		 951 r = dhcp6_start(link);
952 if (r < 0)
953 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 954
1633c457
YW		 955 r = dhcp6_request_prefix_delegation(link);
956 if (r < 0)
957 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 958
e7ab854c
TG		 959 return 0;
960}
961
8566df79 962static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 963 int r;
964
965 assert(link);
ff254138
TG		 966 assert(link->manager);
967 assert(link->manager->event);
968
0107b769 969 if (link->dhcp_client) {
294f129b 970 r = dhcp4_start(link);
0107b769 971 if (r < 0)
294f129b 972 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 973
0b4b66cc 974 } else if (link->ipv4ll) {
6a7a4e4d 975 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 976
977 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 978 if (r < 0)
979 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 980 }
981
ab486ef4
YW		 982 if (link->dhcp_server) {
983 r = sd_dhcp_server_start(link->dhcp_server);
984 if (r < 0)
985 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
986 }
987
6fc25497
SS		 988 return 0;
989}
990
8566df79 991static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 992 int r;
993
994 assert(link);
995
8566df79 996 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 997 if (r < 0)
998 return r;
999
94876904 1000 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 1001 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 1002 if (r < 0)
1003 return r;
1004 }
1005
2ffd6d73
YW		 1006 r = link_lldp_emit_start(link);
1007 if (r < 0)
1008 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1009
ff254138
TG		 1010 return 0;
1011}
1012
a61bb41c 1013bool link_has_carrier(Link *link) {
deb2e523
TG		 1014 /* see Documentation/networking/operstates.txt in the kernel sources */
1015
a61bb41c 1016 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1017 return true;
1018
a61bb41c 1019 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1020 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1021 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1022 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1023 return true;
1024
1025 return false;
1026}
1027
302a796f 1028static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1029 int r;
1030
1746cf2a
TG		 1031 assert(link);
1032
5da8149f 1033 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1034 return 1;
1035
1c4baffc 1036 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1037 if (r < 0)
26d6b214 1038 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1039 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1040
f882c247
TG		 1041 return 1;
1042}
1043
f282ce20 1044int link_up(Link *link) {
4afd3348 1045 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1046 int r;
1047
f882c247 1048 assert(link);
c106cc36 1049 assert(link->network);
f882c247
TG		 1050 assert(link->manager);
1051 assert(link->manager->rtnl);
1052
6a7a4e4d 1053 log_link_debug(link, "Bringing link up");
449f7554 1054
6a7a4e4d
LP		 1055 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1056 if (r < 0)
1057 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1058
5d4795f3 1059 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1060 if (r < 0)
1061 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1062
302a796f
YW		 1063 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1064 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1065 if (r < 0)
1066 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1067
b226d99b
TG		 1068 link_ref(link);
1069
f882c247
TG		 1070 return 0;
1071}
1072
302a796f 1073static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1074 int r;
1075
1076 assert(link);
1077
1078 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1079 return 1;
1080
1c4baffc 1081 r = sd_netlink_message_get_errno(m);
0d4ad91d 1082 if (r < 0)
5ecb131d 1083 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1084
1085 return 1;
1086}
1087
8e54db83 1088int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1089 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1090 int r;
1091
1092 assert(link);
1093 assert(link->manager);
1094 assert(link->manager->rtnl);
1095
6a7a4e4d 1096 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1097
1098 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1099 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1100 if (r < 0)
1101 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1102
1103 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1104 if (r < 0)
1105 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1106
8e54db83
YW		 1107 r = netlink_call_async(link->manager->rtnl, NULL, req,
1108 callback ?: link_down_handler,
302a796f 1109 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1110 if (r < 0)
1111 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1112
1113 link_ref(link);
1114
1115 return 0;
1116}
1117
1118static int link_handle_bound_to_list(Link *link) {
1119 Link *l;
0d4ad91d
AR		 1120 int r;
1121 bool required_up = false;
1122 bool link_is_up = false;
1123
1124 assert(link);
1125
1126 if (hashmap_isempty(link->bound_to_links))
1127 return 0;
1128
1129 if (link->flags & IFF_UP)
1130 link_is_up = true;
1131
90e74a66 1132 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1133 if (link_has_carrier(l)) {
1134 required_up = true;
1135 break;
1136 }
1137
1138 if (!required_up && link_is_up) {
8e54db83 1139 r = link_down(link, NULL);
0d4ad91d
AR		 1140 if (r < 0)
1141 return r;
1142 } else if (required_up && !link_is_up) {
1143 r = link_up(link);
1144 if (r < 0)
1145 return r;
1146 }
1147
1148 return 0;
1149}
1150
1151static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1152 Link *l;
1153 int r;
1154
1155 assert(link);
1156
1157 if (hashmap_isempty(link->bound_by_links))
1158 return 0;
1159
90e74a66 1160 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1161 r = link_handle_bound_to_list(l);
1162 if (r < 0)
1163 return r;
1164 }
1165
1166 return 0;
1167}
1168
1169static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1170 int r;
1171
1172 assert(link);
1173 assert(carrier);
1174
1175 if (link == carrier)
1176 return 0;
1177
1178 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1179 return 0;
1180
190b3b5c 1181 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1182 if (r < 0)
1183 return r;
1184
9092113d
YW		 1185 link_dirty(link);
1186
0d4ad91d
AR		 1187 return 0;
1188}
1189
1190static int link_new_bound_by_list(Link *link) {
1191 Manager *m;
1192 Link *carrier;
0d4ad91d 1193 int r;
0d4ad91d
AR		 1194
1195 assert(link);
1196 assert(link->manager);
1197
1198 m = link->manager;
1199
90e74a66 1200 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1201 if (!carrier->network)
1202 continue;
1203
1204 if (strv_isempty(carrier->network->bind_carrier))
1205 continue;
1206
191a3f16 1207 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1208 r = link_put_carrier(link, carrier, &link->bound_by_links);
1209 if (r < 0)
1210 return r;
0d4ad91d
AR		 1211 }
1212 }
1213
90e74a66 1214 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1215 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1216 if (r < 0)
1217 return r;
0d4ad91d
AR		 1218 }
1219
1220 return 0;
1221}
1222
1223static int link_new_bound_to_list(Link *link) {
1224 Manager *m;
1225 Link *carrier;
0d4ad91d 1226 int r;
0d4ad91d
AR		 1227
1228 assert(link);
1229 assert(link->manager);
1230
1231 if (!link->network)
1232 return 0;
1233
1234 if (strv_isempty(link->network->bind_carrier))
1235 return 0;
1236
1237 m = link->manager;
1238
90e74a66 1239 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1240 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1241 r = link_put_carrier(link, carrier, &link->bound_to_links);
1242 if (r < 0)
1243 return r;
0d4ad91d
AR		 1244 }
1245 }
1246
90e74a66 1247 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1248 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1249 if (r < 0)
1250 return r;
0d4ad91d
AR		 1251 }
1252
1253 return 0;
1254}
1255
1256static int link_new_carrier_maps(Link *link) {
1257 int r;
1258
1259 r = link_new_bound_by_list(link);
1260 if (r < 0)
1261 return r;
1262
1263 r = link_handle_bound_by_list(link);
1264 if (r < 0)
1265 return r;
1266
1267 r = link_new_bound_to_list(link);
1268 if (r < 0)
1269 return r;
1270
1271 r = link_handle_bound_to_list(link);
1272 if (r < 0)
1273 return r;
1274
1275 return 0;
1276}
1277
1278static void link_free_bound_to_list(Link *link) {
9092113d 1279 bool updated = false;
0d4ad91d 1280 Link *bound_to;
0d4ad91d 1281
9092113d
YW		 1282 assert(link);
1283
1284 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1285 updated = true;
0d4ad91d
AR		 1286
1287 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1288 link_dirty(bound_to);
0d4ad91d
AR		 1289 }
1290
9092113d
YW		 1291 if (updated)
1292 link_dirty(link);
1293
0d4ad91d
AR		 1294 return;
1295}
1296
1297static void link_free_bound_by_list(Link *link) {
9092113d 1298 bool updated = false;
0d4ad91d 1299 Link *bound_by;
0d4ad91d 1300
9092113d
YW		 1301 assert(link);
1302
1303 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1304 updated = true;
0d4ad91d
AR		 1305
1306 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1307 link_dirty(bound_by);
0d4ad91d
AR		 1308 link_handle_bound_to_list(bound_by);
1309 }
1310 }
1311
9092113d
YW		 1312 if (updated)
1313 link_dirty(link);
1314
0d4ad91d
AR		 1315 return;
1316}
1317
1318static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1319 assert(link);
1320
9092113d
YW		 1321 link_free_bound_to_list(link);
1322 link_free_bound_by_list(link);
0d4ad91d
AR		 1323
1324 return;
1325}
1326
5f707e12
YW		 1327static int link_append_to_master(Link *link, NetDev *netdev) {
1328 Link *master;
1329 int r;
1330
1331 assert(link);
1332 assert(netdev);
1333
1334 r = link_get(link->manager, netdev->ifindex, &master);
1335 if (r < 0)
1336 return r;
1337
de7fef4b 1338 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1339 if (r <= 0)
5f707e12
YW		 1340 return r;
1341
1342 link_ref(link);
1343 return 0;
1344}
1345
1346static void link_drop_from_master(Link *link, NetDev *netdev) {
1347 Link *master;
1348
1349 assert(link);
1350
1351 if (!link->manager || !netdev)
1352 return;
1353
1354 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1355 return;
1356
1357 link_unref(set_remove(master->slaves, link));
1358}
1359
56001f02
YW		 1360static void link_drop_requests(Link *link) {
1361 Request *req;
1362
1363 assert(link);
1364 assert(link->manager);
1365
1366 ORDERED_SET_FOREACH(req, link->manager->request_queue)
1367 if (req->link == link)
1368 request_drop(req);
1369}
1370
cc2d7efc
YW		 1371
1372static Link *link_drop(Link *link) {
0b54c870
YW		 1373 char **n;
1374
63130eb3 1375 if (!link)
cc2d7efc 1376 return NULL;
0d4ad91d 1377
63130eb3
YW		 1378 assert(link->manager);
1379
0d4ad91d
AR		 1380 link_set_state(link, LINK_STATE_LINGER);
1381
63130eb3
YW		 1382 /* Drop all references from other links and manager. Note that async netlink calls may have
1383 * references to the link, and they will be dropped when we receive replies. */
1384
56001f02
YW		 1385 link_drop_requests(link);
1386
0d4ad91d
AR		 1387 link_free_carrier_maps(link);
1388
5f707e12 1389 if (link->network) {
c0267a59 1390 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1391 link_drop_from_master(link, link->network->bridge);
1392 link_drop_from_master(link, link->network->bond);
1393 }
1394
63130eb3 1395 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 1396
db2f8a2e 1397 (void) unlink(link->state_file);
63130eb3
YW		 1398 link_clean(link);
1399
0b54c870
YW		 1400 STRV_FOREACH(n, link->alternative_names)
1401 hashmap_remove(link->manager->links_by_name, *n);
1402
1403 hashmap_remove(link->manager->links_by_name, link->ifname);
1404
63130eb3
YW		 1405 /* The following must be called at last. */
1406 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1407 return link_unref(link);
0d4ad91d
AR		 1408}
1409
04952b25 1410int link_activate(Link *link) {
f882c247
TG		 1411 int r;
1412
ef1ba606 1413 assert(link);
f5be5601 1414 assert(link->network);
dd3efc09 1415
61135582
DS		 1416 switch (link->network->activation_policy) {
1417 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1418 r = link_handle_bound_to_list(link);
1419 if (r < 0)
1420 return r;
61135582
DS		 1421 break;
1422 case ACTIVATION_POLICY_UP:
1423 if (link->activated)
1424 break;
1425 _fallthrough_;
1426 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1427 r = link_up(link);
04952b25 1428 if (r < 0)
505f8da7 1429 return r;
61135582
DS		 1430 break;
1431 case ACTIVATION_POLICY_DOWN:
1432 if (link->activated)
1433 break;
1434 _fallthrough_;
1435 case ACTIVATION_POLICY_ALWAYS_DOWN:
1436 r = link_down(link, NULL);
04952b25 1437 if (r < 0)
61135582 1438 return r;
61135582
DS		 1439 break;
1440 default:
1441 break;
ef1ba606 1442 }
61135582 1443 link->activated = true;
f882c247 1444
04952b25
YW		 1445 return 0;
1446}
1447
1448static int link_joined(Link *link) {
1449 int r;
1450
1451 assert(link);
1452 assert(link->network);
1453
1454 r = link_activate(link);
1455 if (r < 0)
1456 return r;
1457
97108953
YW		 1458 link_set_state(link, LINK_STATE_CONFIGURING);
1459
9ed794a3 1460 if (link->network->bridge) {
e1853b00 1461 r = link_set_bridge(link);
6a7a4e4d
LP		 1462 if (r < 0)
1463 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1464
1465 r = link_append_to_master(link, link->network->bridge);
1466 if (r < 0)
1467 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1468 }
1469
eb64b435 1470 if (link->network->bond) {
7fcee284 1471 r = link_set_bond(link);
eb64b435
SS		 1472 if (r < 0)
1473 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1474
45e11abf 1475 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1476 if (r < 0)
1477 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1478 }
1479
34d7f2c9
YW		 1480 r = link_set_bridge_vlan(link);
1481 if (r < 0)
1482 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1483
97108953 1484 r = link_request_static_configs(link);
0e569a43
YW		 1485 if (r < 0)
1486 return r;
1487
97108953
YW		 1488 if (!link_has_carrier(link))
1489 return 0;
1490
8566df79 1491 return link_acquire_dynamic_conf(link);
02b59d57
TG		 1492}
1493
302a796f 1494static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1495 int r;
1496
1746cf2a 1497 assert(link);
ef1ba606 1498 assert(link->network);
34bf3c00 1499 assert(link->enslaving > 0);
02b59d57 1500
313cefa1 1501 link->enslaving--;
52433f6b 1502
5da8149f 1503 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1504 return 1;
1505
1c4baffc 1506 r = sd_netlink_message_get_errno(m);
856f962c 1507 if (r < 0 && r != -EEXIST) {
5ecb131d 1508 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1509 link_enter_failed(link);
1510 return 1;
4ff296b0
YW		 1511 }
1512
1513 log_link_debug(link, "Joined netdev");
02b59d57 1514
34bf3c00 1515 if (link->enslaving == 0) {
4ff296b0
YW		 1516 r = link_joined(link);
1517 if (r < 0)
1518 link_enter_failed(link);
34bf3c00 1519 }
02b59d57
TG		 1520
1521 return 1;
1522}
1523
0fa8ee6c 1524int link_enter_join_netdev(Link *link) {
6a0a2f86 1525 NetDev *netdev;
0fa8ee6c 1526 Request req;
02b59d57
TG		 1527 int r;
1528
1529 assert(link);
1530 assert(link->network);
bd08ce56 1531 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1532
0fa8ee6c
YW		 1533 req = (Request) {
1534 .link = link,
1535 .type = REQUEST_TYPE_SET_LINK,
1536 .set_link_operation = SET_LINK_MTU,
1537 };
1538
1539 if (ordered_set_contains(link->manager->request_queue, &req)) {
1540 link->entering_to_join_netdev = true;
1541 return 0;
1542 }
1543
1544 link->entering_to_join_netdev = false;
1545
289e6774 1546 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1547
34bf3c00 1548 link->enslaving = 0;
02b59d57 1549
d9c67ea1 1550 if (link->network->bond) {
cbff7170
TJ		 1551 if (link->network->bond->state == NETDEV_STATE_READY &&
1552 link->network->bond->ifindex == link->master_ifindex)
1553 return link_joined(link);
1554
f2341e0a
LP		 1555 log_struct(LOG_DEBUG,
1556 LOG_LINK_INTERFACE(link),
1557 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1558 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1559
34bf3c00
YW		 1560 link->enslaving++;
1561
f2341e0a 1562 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1563 if (r < 0) {
f2341e0a
LP		 1564 log_struct_errno(LOG_WARNING, r,
1565 LOG_LINK_INTERFACE(link),
1566 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1567 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1568 link_enter_failed(link);
1569 return r;
c0267a59
AW		 1570 }
1571 }
1572
1573 if (link->network->batadv) {
1574 log_struct(LOG_DEBUG,
1575 LOG_LINK_INTERFACE(link),
1576 LOG_NETDEV_INTERFACE(link->network->batadv),
1577 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1578
1579 link->enslaving++;
1580
1581 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1582 if (r < 0) {
1583 log_struct_errno(LOG_WARNING, r,
1584 LOG_LINK_INTERFACE(link),
1585 LOG_NETDEV_INTERFACE(link->network->batadv),
1586 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1587 link_enter_failed(link);
1588 return r;
52433f6b 1589 }
0ad6148e
MO		 1590 }
1591
d9c67ea1 1592 if (link->network->bridge) {
f2341e0a
LP		 1593 log_struct(LOG_DEBUG,
1594 LOG_LINK_INTERFACE(link),
1595 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1596 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1597
34bf3c00
YW		 1598 link->enslaving++;
1599
f2341e0a 1600 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1601 if (r < 0) {
f2341e0a
LP		 1602 log_struct_errno(LOG_WARNING, r,
1603 LOG_LINK_INTERFACE(link),
1604 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1605 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1606 link_enter_failed(link);
1607 return r;
1608 }
52433f6b
TG		 1609 }
1610
6cb955c6
AR		 1611 if (link->network->vrf) {
1612 log_struct(LOG_DEBUG,
1613 LOG_LINK_INTERFACE(link),
1614 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1615 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1616
34bf3c00
YW		 1617 link->enslaving++;
1618
6cb955c6
AR		 1619 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1620 if (r < 0) {
1621 log_struct_errno(LOG_WARNING, r,
1622 LOG_LINK_INTERFACE(link),
1623 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1624 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1625 link_enter_failed(link);
1626 return r;
1627 }
6cb955c6
AR		 1628 }
1629
90e74a66 1630 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1631
2b6db913
YW		 1632 if (netdev->ifindex > 0)
1633 /* Assume already enslaved. */
a63e5daa 1634 continue;
a63e5daa 1635
7033af49
YW		 1636 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1637 continue;
1638
f2341e0a
LP		 1639 log_struct(LOG_DEBUG,
1640 LOG_LINK_INTERFACE(link),
1641 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1642 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1643
34bf3c00
YW		 1644 link->enslaving++;
1645
f2341e0a 1646 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1647 if (r < 0) {
f2341e0a
LP		 1648 log_struct_errno(LOG_WARNING, r,
1649 LOG_LINK_INTERFACE(link),
1650 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1651 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1652 link_enter_failed(link);
1653 return r;
1654 }
326cb406
SS		 1655 }
1656
34bf3c00
YW		 1657 if (link->enslaving == 0)
1658 return link_joined(link);
1659
ef1ba606
TG		 1660 return 0;
1661}
1662
5e5b137a 1663static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1664 int k, r;
1665
1666 assert(link);
1667 assert(link->manager);
5e5b137a 1668
e36d601c 1669 r = link_drop_foreign_routes(link);
5e5b137a 1670
e36d601c 1671 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 1672 if (k < 0 && r >= 0)
1673 r = k;
1674
e36d601c 1675 k = link_drop_foreign_addresses(link);
0b81225e
YW		 1676 if (k < 0 && r >= 0)
1677 r = k;
d1bdafd2 1678
e36d601c 1679 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 1680 if (k < 0 && r >= 0)
1681 r = k;
1682
0b81225e
YW		 1683 k = manager_drop_foreign_routing_policy_rules(link->manager);
1684 if (k < 0 && r >= 0)
1685 r = k;
1686
1687 return r;
5e5b137a
TG		 1688}
1689
3104883d 1690static int link_drop_config(Link *link) {
0b81225e
YW		 1691 int k, r;
1692
1693 assert(link);
1694 assert(link->manager);
3104883d 1695
e36d601c 1696 r = link_drop_routes(link);
3104883d 1697
e36d601c 1698 k = link_drop_nexthops(link);
0b81225e
YW		 1699 if (k < 0 && r >= 0)
1700 r = k;
d1bdafd2 1701
e36d601c 1702 k = link_drop_addresses(link);
0b81225e
YW		 1703 if (k < 0 && r >= 0)
1704 r = k;
1705
e36d601c 1706 k = link_drop_neighbors(link);
25b82b6e
YW		 1707 if (k < 0 && r >= 0)
1708 r = k;
1709
0b81225e
YW		 1710 k = manager_drop_routing_policy_rules(link->manager, link);
1711 if (k < 0 && r >= 0)
1712 r = k;
3104883d 1713
c69305ff
LP		 1714 ndisc_flush(link);
1715
0b81225e 1716 return r;
3104883d
SS		 1717}
1718
c3b94251 1719static int link_configure(Link *link) {
4ecdcb07
YW		 1720 int r;
1721
ef1ba606 1722 assert(link);
b22d8a00 1723 assert(link->network);
bd08ce56 1724 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1725
34658df2 1726 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1727 if (r < 0)
1728 return r;
1729
518cd6b5
SS		 1730 r = link_configure_sr_iov(link);
1731 if (r < 0)
1732 return r;
1733
500b96eb 1734 if (link->iftype == ARPHRD_CAN)
600b7898 1735 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 1736 return link_configure_can(link);
92c918b0 1737
5e0534f1 1738 r = link_set_sysctl(link);
b69c3180
SS		 1739 if (r < 0)
1740 return r;
8749cbcd 1741
a8e5e27c 1742 r = link_request_to_set_mac(link);
e16e4b3b
DS		 1743 if (r < 0)
1744 return r;
1745
1746 r = link_set_nomaster(link);
1747 if (r < 0)
1748 return r;
1749
93fabc10 1750 r = link_request_to_set_flags(link);
99d2baa2
SS		 1751 if (r < 0)
1752 return r;
1753
cc4c8fb1 1754 r = link_request_to_set_group(link);
89fe6535
SS		 1755 if (r < 0)
1756 return r;
1757
2ffd6d73
YW		 1758 r = ipv4ll_configure(link);
1759 if (r < 0)
1760 return r;
64b21ece 1761
2ffd6d73
YW		 1762 r = dhcp4_configure(link);
1763 if (r < 0)
1764 return r;
eb34d4af 1765
2ffd6d73
YW		 1766 r = dhcp6_configure(link);
1767 if (r < 0)
1768 return r;
f5a8c43f 1769
2ffd6d73
YW		 1770 r = ndisc_configure(link);
1771 if (r < 0)
1772 return r;
4138fb2c 1773
1d28a3cf
YW		 1774 r = link_request_dhcp_server(link);
1775 if (r < 0)
1776 return r;
1777
086b8853
YW		 1778 r = radv_configure(link);
1779 if (r < 0)
1780 return r;
7465dd22 1781
2ffd6d73
YW		 1782 r = link_lldp_rx_configure(link);
1783 if (r < 0)
1784 return r;
ce43e484 1785
f6fcc1c2 1786 r = link_configure_mtu(link);
40288ece
YW		 1787 if (r < 0)
1788 return r;
44b598a1 1789
8e00e24c 1790 r = link_request_to_set_addrgen_mode(link);
9f6e82e6
YW		 1791 if (r < 0)
1792 return r;
0e2fdb83 1793
4c649652
DS		 1794 /* Drop foreign config, but ignore loopback or critical devices.
1795 * We do not want to remove loopback address or addresses used for root NFS. */
1796 if (!(link->flags & IFF_LOOPBACK) &&
1797 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
1798 r = link_drop_foreign_config(link);
1799 if (r < 0)
1800 return r;
1801 }
1802
3f265037 1803 return link_enter_join_netdev(link);
505f8da7
TG		 1804}
1805
170e88c8
YW		 1806static int link_get_network(Link *link, Network **ret) {
1807 Network *network;
1a3caa49 1808 int r;
170e88c8
YW		 1809
1810 assert(link);
1811 assert(link->manager);
1812 assert(ret);
1813
1814 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1815 bool warn = false;
1816
1a3caa49 1817 r = net_match_config(
170e88c8
YW		 1818 &network->match,
1819 link->sd_device,
1820 &link->hw_addr.addr.ether,
1821 &link->permanent_mac,
1822 link->driver,
1823 link->iftype,
1824 link->ifname,
1825 link->alternative_names,
1826 link->wlan_iftype,
1827 link->ssid,
1a3caa49
YW		 1828 &link->bssid);
1829 if (r < 0)
1830 return r;
1831 if (r == 0)
170e88c8
YW		 1832 continue;
1833
1834 if (network->match.ifname && link->sd_device) {
1835 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1836 const char *attr;
1837
1838 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1839 (void) safe_atou8(attr, &name_assign_type);
1840
1841 warn = name_assign_type == NET_NAME_ENUM;
1842 }
1843
1844 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1845 "found matching network '%s'%s.",
1846 network->filename,
1847 warn ? ", based on potentially unpredictable interface name" : "");
1848
1849 if (network->unmanaged)
1850 return -ENOENT;
1851
1852 *ret = network;
1853 return 0;
1854 }
1855
1856 return -ENOENT;
1857}
1858
0b54c870
YW		 1859static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
1860 _cleanup_strv_free_ char **altnames = NULL;
1861 char **n;
1862 int r;
1863
1864 assert(link);
1865 assert(message);
1866
1867 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
1868 if (r < 0 && r != -ENODATA)
1869 return r;
1870
1871 STRV_FOREACH(n, link->alternative_names)
1872 hashmap_remove(link->manager->links_by_name, *n);
1873
1874 strv_free_and_replace(link->alternative_names, altnames);
1875
1876 STRV_FOREACH(n, link->alternative_names) {
1877 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
1878 if (r < 0)
1879 return r;
1880 }
1881
1882 return 0;
1883}
1884
572b21d9 1885static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 1886 Network *network;
1887 int r;
1888
8bceafa7 1889 assert(m);
572b21d9 1890
8bceafa7
YW		 1891 r = sd_netlink_message_get_errno(m);
1892 if (r < 0)
1893 return r;
572b21d9 1894
0b54c870
YW		 1895 r = link_update_alternative_names(link, m);
1896 if (r < 0)
8bceafa7 1897 return r;
572b21d9 1898
170e88c8 1899 r = link_get_network(link, &network);
ad932b15
YW		 1900 if (r == -ENOENT) {
1901 link_enter_unmanaged(link);
1902 return 0;
170e88c8
YW		 1903 }
1904 if (r < 0)
ad932b15
YW		 1905 return r;
1906
99b8517c 1907 if (link->network == network && !force)
ad932b15
YW		 1908 return 0;
1909
1910 log_link_info(link, "Re-configuring with %s", network->filename);
1911
1912 /* Dropping old .network file */
2a99eed0 1913 r = link_stop_engines(link, false);
572b21d9 1914 if (r < 0)
ad932b15 1915 return r;
ad932b15 1916
19d9a5ad
YW		 1917 link_drop_requests(link);
1918
ad932b15
YW		 1919 r = link_drop_config(link);
1920 if (r < 0)
1921 return r;
1922
2c7b826d 1923 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 1924 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 1925 r = link_drop_foreign_config(link);
1926 if (r < 0)
1927 return r;
1928 }
1929
1930 link_free_carrier_maps(link);
1931 link_free_engines(link);
1932 link->network = network_unref(link->network);
59c31eba 1933 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 1934
1935 /* Then, apply new .network file */
9092113d
YW		 1936 link->network = network_ref(network);
1937 link_dirty(link);
ad932b15
YW		 1938
1939 r = link_new_carrier_maps(link);
1940 if (r < 0)
1941 return r;
1942
1943 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1944 link->activated = false;
ad932b15 1945
ad932b15
YW		 1946 r = link_configure(link);
1947 if (r < 0)
1948 return r;
1949
1950 return 0;
1951}
1952
572b21d9
YW		 1953static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1954 int r;
1955
1956 r = link_reconfigure_internal(link, m, false);
1957 if (r < 0)
1958 link_enter_failed(link);
1959
1960 return 1;
1961}
1962
1963static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1964 int r;
1965
1966 r = link_reconfigure_internal(link, m, true);
1967 if (r < 0)
1968 link_enter_failed(link);
1969
1970 return 1;
1971}
1972
1973int link_reconfigure(Link *link, bool force) {
1974 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1975 int r;
1976
8bceafa7 1977 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1978 * the function from being called multiple times simultaneously, refuse to reconfigure the
1979 * interface in these cases. */
8bceafa7 1980 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1981 return 0; /* 0 means no-op. */
2c0d7ed3 1982
572b21d9
YW		 1983 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
1984 link->ifindex);
1985 if (r < 0)
1986 return r;
1987
1988 r = netlink_call_async(link->manager->rtnl, NULL, req,
1989 force ? link_force_reconfigure_handler : link_reconfigure_handler,
1990 link_netlink_destroy_callback, link);
1991 if (r < 0)
1992 return r;
1993
1994 link_ref(link);
1995
8bceafa7 1996 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1997}
1998
e6bf7774 1999static int link_initialized_and_synced(Link *link) {
505f8da7 2000 Network *network;
505f8da7
TG		 2001 int r;
2002
2003 assert(link);
2004 assert(link->ifname);
2005 assert(link->manager);
2006
bd08ce56
YW		 2007 /* We may get called either from the asynchronous netlink callback,
2008 * or directly for link_add() if running in a container. See link_add(). */
2009 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2010 return 0;
505f8da7 2011
6a7a4e4d 2012 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2013 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2014
0d4ad91d
AR		 2015 r = link_new_bound_by_list(link);
2016 if (r < 0)
2017 return r;
2018
2019 r = link_handle_bound_by_list(link);
2020 if (r < 0)
2021 return r;
2022
c4a03a56 2023 if (!link->network) {
0894cfe4 2024 r = wifi_get_info(link);
8d968fdd
YW		 2025 if (r < 0)
2026 return r;
2027
170e88c8 2028 r = link_get_network(link, &network);
c4a03a56
TG		 2029 if (r == -ENOENT) {
2030 link_enter_unmanaged(link);
4232cf04 2031 return 0;
170e88c8
YW		 2032 }
2033 if (r < 0)
c4a03a56 2034 return r;
505f8da7 2035
c4a03a56
TG		 2036 if (link->flags & IFF_LOOPBACK) {
2037 if (network->link_local != ADDRESS_FAMILY_NO)
2038 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2039
c4a03a56
TG		 2040 if (network->dhcp != ADDRESS_FAMILY_NO)
2041 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2042
c4a03a56
TG		 2043 if (network->dhcp_server)
2044 log_link_debug(link, "Ignoring DHCP server for loopback link");
2045 }
bd2efe92 2046
9092113d 2047 link->network = network_ref(network);
bcdcc596 2048 link_update_operstate(link, false);
9092113d 2049 link_dirty(link);
c4a03a56 2050 }
505f8da7 2051
0d4ad91d
AR		 2052 r = link_new_bound_to_list(link);
2053 if (r < 0)
2054 return r;
2055
a748b692
TG		 2056 r = link_configure(link);
2057 if (r < 0)
2058 return r;
2059
4232cf04 2060 return 0;
505f8da7
TG		 2061}
2062
302a796f 2063static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2064 int r;
2065
572b21d9
YW		 2066 r = sd_netlink_message_get_errno(m);
2067 if (r < 0) {
40681e5c 2068 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2069 link_enter_failed(link);
2070 return 0;
2071 }
2072
0b54c870
YW		 2073 r = link_update_alternative_names(link, m);
2074 if (r < 0) {
572b21d9 2075 link_enter_failed(link);
0b54c870 2076 return r;
572b21d9
YW		 2077 }
2078
4ff296b0
YW		 2079 r = link_initialized_and_synced(link);
2080 if (r < 0)
2081 link_enter_failed(link);
e6bf7774
YW		 2082 return 1;
2083}
2084
3be9d62a 2085static int link_initialized(Link *link, sd_device *device) {
4afd3348 2086 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2087 int r;
2088
2089 assert(link);
2090 assert(link->manager);
2091 assert(link->manager->rtnl);
2092 assert(device);
2093
8434fd5c 2094 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2095 return 0;
2096
51517f9e 2097 if (link->sd_device)
679b3605
TG		 2098 return 0;
2099
79008bdd 2100 log_link_debug(link, "udev initialized link");
bd08ce56 2101 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2102
51517f9e 2103 link->sd_device = sd_device_ref(device);
4f561e8e 2104
3c9b8860
TG		 2105 /* udev has initialized the link, but we don't know if we have yet
2106 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2107 * when it returns we know that the pending NEWLINKs have already been
2108 * processed and that we are up-to-date */
4f561e8e 2109
3c9b8860
TG		 2110 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2111 link->ifindex);
4f561e8e
TG		 2112 if (r < 0)
2113 return r;
2114
302a796f
YW		 2115 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2116 link_netlink_destroy_callback, link);
4f561e8e
TG		 2117 if (r < 0)
2118 return r;
2119
5da8149f
TG		 2120 link_ref(link);
2121
4f561e8e
TG		 2122 return 0;
2123}
2124
cc2d7efc
YW		 2125static Link *link_drop_or_unref(Link *link) {
2126 if (!link)
2127 return NULL;
2128 if (!link->manager)
2129 return link_unref(link);
2130 return link_drop(link);
2131}
2132
2133DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2134
2135static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2136 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2137 _cleanup_free_ char *ifname = NULL, *kind = NULL;
2138 unsigned short iftype;
2139 int r, ifindex;
2140 uint16_t type;
2141
2142 assert(manager);
2143 assert(message);
2144 assert(ret);
2145
2146 r = sd_netlink_message_get_type(message, &type);
2147 if (r < 0)
2148 return r;
2149 else if (type != RTM_NEWLINK)
2150 return -EINVAL;
2151
2152 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2153 if (r < 0)
2154 return r;
2155 else if (ifindex <= 0)
2156 return -EINVAL;
2157
2158 r = sd_rtnl_message_link_get_type(message, &iftype);
2159 if (r < 0)
2160 return r;
2161
2162 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2163 if (r < 0)
2164 return r;
2165
2166 /* check for link kind */
2167 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2168 if (r >= 0) {
2169 (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2170 r = sd_netlink_message_exit_container(message);
2171 if (r < 0)
2172 return r;
2173 }
2174
2175 link = new(Link, 1);
2176 if (!link)
2177 return -ENOMEM;
2178
2179 *link = (Link) {
2180 .n_ref = 1,
2181 .state = LINK_STATE_PENDING,
bcdcc596 2182 .online_state = _LINK_ONLINE_STATE_INVALID,
cc2d7efc
YW		 2183 .ifindex = ifindex,
2184 .iftype = iftype,
2185 .ifname = TAKE_PTR(ifname),
2186 .kind = TAKE_PTR(kind),
2187
2188 .n_dns = UINT_MAX,
2189 .dns_default_route = -1,
2190 .llmnr = _RESOLVE_SUPPORT_INVALID,
2191 .mdns = _RESOLVE_SUPPORT_INVALID,
2192 .dnssec_mode = _DNSSEC_MODE_INVALID,
2193 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2194 };
2195
2196 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
2197 if (r < 0)
2198 return r;
2199
2200 link->manager = manager;
2201
2202 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex);
2203 if (r < 0)
2204 log_link_debug_errno(link, r, "New device has no master, continuing without");
2205
2206 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
2207 if (r < 0)
2208 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
2209
2210 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2211 if (r < 0)
2212 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
2213
2214 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2215 if (r < 0)
2216 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2217
2218 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2219 if (r < 0)
2220 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2221
cc2d7efc
YW		 2222 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
2223 return -ENOMEM;
2224
2225 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
2226 return -ENOMEM;
2227
2228 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
2229 return -ENOMEM;
2230
0b54c870
YW		 2231 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2232 if (r < 0)
2233 return r;
2234
2235 r = link_update_alternative_names(link, message);
2236 if (r < 0)
2237 return r;
2238
cc2d7efc
YW		 2239 r = link_update_flags(link, message, false);
2240 if (r < 0)
2241 return r;
2242
2243 *ret = TAKE_PTR(link);
2244
2245 return 0;
2246}
2247
3be9d62a 2248static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2249 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2250 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2251 Link *link;
5a937ea2 2252 int r;
505f8da7
TG		 2253
2254 assert(m);
fbbeb65a 2255 assert(m->rtnl);
505f8da7
TG		 2256 assert(message);
2257 assert(ret);
2258
2259 r = link_new(m, message, ret);
2260 if (r < 0)
2261 return r;
2262
2263 link = *ret;
2264
6a7a4e4d 2265 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2266
bf331d87
YW		 2267 if (path_is_read_only_fs("/sys") <= 0) {
2268 /* udev should be around */
ae06ab10 2269 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2270 r = sd_device_new_from_device_id(&device, ifindex_str);
2271 if (r < 0) {
83e7c37b 2272 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2273 return 0;
5c416fc4 2274 }
505f8da7 2275
5a937ea2 2276 r = sd_device_get_is_initialized(device);
51517f9e 2277 if (r < 0) {
bf331d87 2278 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2279 goto failed;
2280 }
5a937ea2 2281 if (r == 0) {
505f8da7 2282 /* not yet ready */
79008bdd 2283 log_link_debug(link, "link pending udev initialization...");
505f8da7 2284 return 0;
3c4cb064 2285 }
505f8da7 2286
299ad32d
YW		 2287 r = device_is_renaming(device);
2288 if (r < 0) {
bf331d87 2289 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2290 goto failed;
2291 }
2292 if (r > 0) {
bf331d87 2293 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2294 return 0;
2295 }
2296
4f561e8e
TG		 2297 r = link_initialized(link, device);
2298 if (r < 0)
5c416fc4 2299 goto failed;
4f561e8e 2300 } else {
e6bf7774 2301 r = link_initialized_and_synced(link);
4f561e8e 2302 if (r < 0)
5c416fc4 2303 goto failed;
4f561e8e 2304 }
505f8da7 2305
a748b692 2306 return 0;
5c416fc4
TG		 2307failed:
2308 link_enter_failed(link);
2309 return r;
a748b692
TG		 2310}
2311
c601ebf7 2312int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2313 int r;
2314
2315 assert(link);
2316
2317 log_link_info(link, "Gained IPv6LL");
2318
c601ebf7 2319 link->ipv6ll_address = *address;
e7ab854c
TG		 2320 link_check_ready(link);
2321
b9ea3d2e 2322 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2323 r = link_acquire_dynamic_ipv6_conf(link);
e7ab854c
TG		 2324 if (r < 0) {
2325 link_enter_failed(link);
2326 return r;
2327 }
2328 }
2329
2330 return 0;
2331}
2332
3be9d62a
YW		 2333int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2334 sd_device_action_t action;
2335 Manager *m = userdata;
2336 Link *link = NULL;
2337 int r, ifindex;
2338
2339 assert(m);
2340 assert(device);
2341
2342 r = sd_device_get_action(device, &action);
2343 if (r < 0) {
2344 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2345 return 0;
2346 }
2347
2348 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2349 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2350 * still exists — and we are interested in that. */
2351 if (action == SD_DEVICE_REMOVE)
2352 return 0;
2353
2354 r = sd_device_get_ifindex(device, &ifindex);
2355 if (r < 0) {
2356 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2357 device_action_to_string(action));
2358 return 0;
2359 }
2360
2361 r = device_is_renaming(device);
2362 if (r < 0) {
2363 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2364 device_action_to_string(action));
2365 return 0;
2366 }
2367 if (r > 0) {
2368 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2369 return 0;
2370 }
2371
2372 r = link_get(m, ifindex, &link);
2373 if (r < 0) {
2374 if (r != -ENODEV)
2375 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2376 return 0;
2377 }
2378
2379 (void) link_initialized(link, device);
2380
2381 return 0;
2382}
2383
9c0a72f9
TG		 2384static int link_carrier_gained(Link *link) {
2385 int r;
2386
2387 assert(link);
2388
600b7898
YW		 2389 if (link->iftype == ARPHRD_CAN)
2390 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2391 return link_handle_bound_by_list(link);
2392
0894cfe4 2393 r = wifi_get_info(link);
8d968fdd
YW		 2394 if (r < 0)
2395 return r;
2396 if (r > 0) {
8bceafa7 2397 r = link_reconfigure(link, false);
f0269653 2398 if (r < 0)
8d968fdd
YW		 2399 return r;
2400 }
2401
b9ea3d2e 2402 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2403 r = link_acquire_dynamic_conf(link);
f0269653 2404 if (r < 0)
9c0a72f9 2405 return r;
6fc25497 2406
97108953 2407 r = link_request_static_configs(link);
6fc25497
SS		 2408 if (r < 0)
2409 return r;
9c0a72f9
TG		 2410 }
2411
9a038aac 2412 return link_handle_bound_by_list(link);
9c0a72f9
TG		 2413}
2414
2415static int link_carrier_lost(Link *link) {
2416 int r;
2417
2418 assert(link);
2419
25e992ba 2420 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2421 return 0;
2422
600b7898
YW		 2423 if (link->iftype == ARPHRD_CAN)
2424 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2425 return link_handle_bound_by_list(link);
2426
2a99eed0 2427 r = link_stop_engines(link, false);
9c0a72f9
TG		 2428 if (r < 0) {
2429 link_enter_failed(link);
2430 return r;
2431 }
2432
19d9a5ad
YW		 2433 link_drop_requests(link);
2434
3104883d
SS		 2435 r = link_drop_config(link);
2436 if (r < 0)
2437 return r;
2438
2c7b826d 2439 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2440 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2441 r = link_drop_foreign_config(link);
2442 if (r < 0)
2443 return r;
2444 }
3104883d 2445
0d4ad91d
AR		 2446 r = link_handle_bound_by_list(link);
2447 if (r < 0)
2448 return r;
2449
9c0a72f9
TG		 2450 return 0;
2451}
2452
2453int link_carrier_reset(Link *link) {
2454 int r;
2455
2456 assert(link);
2457
2458 if (link_has_carrier(link)) {
2459 r = link_carrier_lost(link);
2460 if (r < 0)
2461 return r;
2462
2463 r = link_carrier_gained(link);
2464 if (r < 0)
2465 return r;
2466
6a7a4e4d 2467 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2468 }
2469
2470 return 0;
2471}
2472
d236718c
DS		 2473static int link_admin_state_up(Link *link) {
2474 int r;
2475
61135582
DS		 2476 assert(link);
2477
3be9d62a
YW		 2478 /* This is called every time an interface admin state changes to up;
2479 * specifically, when IFF_UP flag changes from unset to set. */
2480
61135582
DS		 2481 if (!link->network)
2482 return 0;
2483
2484 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2485 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2486 return link_down(link, NULL);
2487 }
2488
d236718c 2489 /* We set the ipv6 mtu after the device mtu, but the kernel resets
fa283812
YW		 2490 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
2491 r = link_set_ipv6_mtu(link);
2492 if (r < 0)
2493 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
d236718c
DS		 2494
2495 return 0;
2496}
2497
61135582 2498static int link_admin_state_down(Link *link) {
61135582
DS		 2499 assert(link);
2500
2501 if (!link->network)
2502 return 0;
2503
2504 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2505 if (streq_ptr(link->kind, "can") && !link->can_configured)
2506 /* CAN device needs to be down on configure. */
2507 return 0;
2508
61135582
DS		 2509 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2510 return link_up(link);
2511 }
2512
2513 return 0;
2514}
2515
3be9d62a 2516static int link_update(Link *link, sd_netlink_message *m) {
b8162cd2 2517 hw_addr_data hw_addr;
ca4e095a 2518 const char *ifname;
afe7fd56 2519 uint32_t mtu;
d236718c 2520 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2521 int old_master, r;
22936833 2522
dd3efc09 2523 assert(link);
b8941f74 2524 assert(link->ifname);
22936833
TG		 2525 assert(m);
2526
7619683b 2527 if (link->state == LINK_STATE_LINGER) {
5238e957 2528 log_link_info(link, "Link re-added");
289e6774 2529 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2530
2531 r = link_new_carrier_maps(link);
2532 if (r < 0)
2533 return r;
7619683b
TG		 2534 }
2535
1c4baffc 2536 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2537 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2538 Manager *manager = link->manager;
b8941f74 2539
30de2b89 2540 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2541
30de2b89
YW		 2542 link_drop(link);
2543 r = link_add(manager, m, &link);
2544 if (r < 0)
2545 return r;
0b54c870
YW		 2546 } else {
2547 r = link_update_alternative_names(link, m);
2548 if (r < 0)
2549 return r;
b8941f74
TG		 2550 }
2551
1c4baffc 2552 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2553 if (r >= 0 && mtu > 0) {
2554 link->mtu = mtu;
4e964aa0 2555 if (link->original_mtu == 0) {
afe7fd56 2556 link->original_mtu = mtu;
6a7a4e4d 2557 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2558 }
2559
2560 if (link->dhcp_client) {
3c9b8860
TG		 2561 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2562 link->mtu);
fc95c359
YW		 2563 if (r < 0)
2564 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2565 }
7465dd22
PF		 2566
2567 if (link->radv) {
2568 r = sd_radv_set_mtu(link->radv, link->mtu);
2569 if (r < 0)
2570 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2571 }
9842de0d 2572 }
69629de9 2573
e9189a1f
TG		 2574 /* The kernel may broadcast NEWLINK messages without the MAC address
2575 set, simply ignore them. */
b8162cd2
TR		 2576 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2577 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2578 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2579
b8162cd2 2580 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2581
b8162cd2 2582 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2583
a3adb4a6
YW		 2584 r = ipv4ll_update_mac(link);
2585 if (r < 0)
2586 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2587
d947f7f9
YW		 2588 r = dhcp4_update_mac(link);
2589 if (r < 0)
2590 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2591
eebba6dc
YW		 2592 r = dhcp6_update_mac(link);
2593 if (r < 0)
2594 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2595
d0c4275c 2596 r = radv_update_mac(link);
be9363cc
YW		 2597 if (r < 0)
2598 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2599
2600 if (link->ndisc) {
b8162cd2 2601 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2602 if (r < 0)
2603 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2604 }
d93d655c 2605
dfc58b47
YW		 2606 if (link->lldp) {
2607 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
2608 if (r < 0)
2609 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
2610 }
2611
d93d655c
YW		 2612 r = ipv4_dad_update_mac(link);
2613 if (r < 0)
2614 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2615 }
2616
bb262ef0
YW		 2617 old_master = link->master_ifindex;
2618 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2619
d236718c 2620 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2621 had_carrier = link_has_carrier(link);
2622
bb262ef0 2623 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2624 if (r < 0)
2625 return r;
2626
d236718c
DS		 2627 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2628 log_link_info(link, "Link UP");
2629
2630 r = link_admin_state_up(link);
2631 if (r < 0)
2632 return r;
61135582 2633 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2634 log_link_info(link, "Link DOWN");
2635
61135582
DS		 2636 r = link_admin_state_down(link);
2637 if (r < 0)
2638 return r;
2639 }
2640
273eec24
LP		 2641 r = link_update_lldp(link);
2642 if (r < 0)
2643 return r;
2644
a61bb41c
TG		 2645 carrier_gained = !had_carrier && link_has_carrier(link);
2646 carrier_lost = had_carrier && !link_has_carrier(link);
2647
2648 if (carrier_gained) {
6a7a4e4d 2649 log_link_info(link, "Gained carrier");
a61bb41c 2650
9c0a72f9
TG		 2651 r = link_carrier_gained(link);
2652 if (r < 0)
2653 return r;
a61bb41c 2654 } else if (carrier_lost) {
6a7a4e4d 2655 log_link_info(link, "Lost carrier");
a61bb41c 2656
9c0a72f9
TG		 2657 r = link_carrier_lost(link);
2658 if (r < 0)
a61bb41c 2659 return r;
a61bb41c
TG		 2660 }
2661
2662 return 0;
dd3efc09 2663}
fe8db0c5 2664
3be9d62a
YW		 2665int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2666 Link *link = NULL;
2667 NetDev *netdev = NULL;
2668 uint16_t type;
2669 const char *name;
2670 int r, ifindex;
2671
2672 assert(rtnl);
2673 assert(message);
2674 assert(m);
2675
2676 if (sd_netlink_message_is_error(message)) {
2677 r = sd_netlink_message_get_errno(message);
2678 if (r < 0)
2679 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2680
2681 return 0;
2682 }
2683
2684 r = sd_netlink_message_get_type(message, &type);
2685 if (r < 0) {
2686 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2687 return 0;
2688 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2689 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2690 return 0;
2691 }
2692
2693 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2694 if (r < 0) {
2695 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2696 return 0;
2697 } else if (ifindex <= 0) {
2698 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2699 return 0;
2700 }
2701
2702 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2703 if (r < 0) {
2704 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2705 return 0;
2706 }
2707
2708 (void) link_get(m, ifindex, &link);
2709 (void) netdev_get(m, name, &netdev);
2710
2711 switch (type) {
2712 case RTM_NEWLINK:
2713 if (!link) {
2714 /* link is new, so add it */
2715 r = link_add(m, message, &link);
2716 if (r < 0) {
2717 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2718 return 0;
2719 }
2720 }
2721
2722 if (netdev) {
2723 /* netdev exists, so make sure the ifindex matches */
2724 r = netdev_set_ifindex(netdev, message);
2725 if (r < 0) {
2726 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2727 return 0;
2728 }
2729 }
2730
2731 r = link_update(link, message);
2732 if (r < 0) {
f0269653
YW		 2733 log_warning_errno(r, "Could not process link message: %m");
2734 link_enter_failed(link);
3be9d62a
YW		 2735 return 0;
2736 }
2737
2738 break;
2739
2740 case RTM_DELLINK:
2741 link_drop(link);
2742 netdev_drop(netdev);
2743
2744 break;
2745
2746 default:
2747 assert_not_reached("Received link message with invalid RTNL message type.");
2748 }
2749
2750 return 1;
2751}
2752
fe8db0c5 2753static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2754 [LINK_STATE_PENDING] = "pending",
bd08ce56 2755 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2756 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2757 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2758 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2759 [LINK_STATE_FAILED] = "failed",
370e9930 2760 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2761};
2762
2763DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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