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network: rename link_acquire_conf() -> link_acquire_dynamic_conf()
[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"
19d9a5ad 48#include "networkd-sriov.h"
3b5a4fc6 49#include "networkd-state-file.h"
19d9a5ad 50#include "networkd-sysctl.h"
8d968fdd 51#include "networkd-wifi.h"
cf1d700d
TG		 52#include "set.h"
53#include "socket-util.h"
bf331d87 54#include "stat-util.h"
15a5e950 55#include "stdio-util.h"
8b43440b 56#include "string-table.h"
51517f9e 57#include "strv.h"
62e021a9 58#include "sysctl-util.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
154 return true;
155}
156
34bf3c00
YW		 157static bool link_is_enslaved(Link *link) {
158 if (link->flags & IFF_SLAVE)
159 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
160 return true;
161
34bf3c00
YW		 162 if (!link->network)
163 return false;
164
bb262ef0 165 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 166 return true;
167
bb262ef0
YW		 168 /* TODO: add conditions for other netdevs. */
169
34bf3c00
YW		 170 return false;
171}
172
45e11abf
YW		 173static void link_update_master_operstate(Link *link, NetDev *netdev) {
174 Link *master;
175
176 if (!netdev)
177 return;
178
7936917e
YW		 179 if (netdev->ifindex <= 0)
180 return;
181
e8f99f4e
YW		 182 /* If an interface is self-mentioned in Bridge= or friends, then it introduces an infinite loop.
183 * FIXME: there still exits a possibility of an infinite loop when two or more interfaces
184 * mention each other in Bridge= or so. We need to detect such a loop. */
185 if (link->ifindex == netdev->ifindex)
186 return;
187
45e11abf
YW		 188 if (link_get(link->manager, netdev->ifindex, &master) < 0)
189 return;
190
191 link_update_operstate(master, true);
192}
193
8430841b
L		 194static LinkAddressState address_state_from_scope(uint8_t scope) {
195 if (scope < RT_SCOPE_SITE)
196 /* universally accessible addresses found */
197 return LINK_ADDRESS_STATE_ROUTABLE;
198
199 if (scope < RT_SCOPE_HOST)
200 /* only link or site local addresses found */
201 return LINK_ADDRESS_STATE_DEGRADED;
202
203 /* no useful addresses found */
204 return LINK_ADDRESS_STATE_OFF;
205}
206
45e11abf 207void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 208 LinkOperationalState operstate;
1678fbb3 209 LinkCarrierState carrier_state;
8430841b 210 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
bcdcc596 211 LinkOnlineState online_state;
35c5a9ca 212 _cleanup_strv_free_ char **p = NULL;
90afec18 213 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 214 bool changed = false;
1678fbb3 215 Address *address;
14153d1b 216
84de38c5
TG		 217 assert(link);
218
219 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 220 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 221 else if (link_has_carrier(link)) {
1678fbb3
YW		 222 if (link_is_enslaved(link))
223 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 224 else
1678fbb3 225 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 226 } else if (link->flags & IFF_UP)
1678fbb3 227 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 228 else
1678fbb3 229 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 230
1678fbb3 231 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 232 Link *slave;
233
90e74a66 234 SET_FOREACH(slave, link->slaves) {
959f65d3 235 link_update_operstate(slave, false);
84de38c5 236
1678fbb3
YW		 237 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
238 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 239 }
959f65d3 240 }
84de38c5 241
90e74a66 242 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 243 if (!address_is_ready(address))
244 continue;
84de38c5 245
90afec18
YW		 246 if (address->family == AF_INET)
247 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 248
90afec18
YW		 249 if (address->family == AF_INET6)
250 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 251 }
84de38c5 252
1678fbb3 253 /* for operstate we also take foreign addresses into account */
90e74a66 254 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 255 if (!address_is_ready(address))
256 continue;
257
90afec18
YW		 258 if (address->family == AF_INET)
259 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 260
90afec18
YW		 261 if (address->family == AF_INET6)
262 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 263 }
264
8430841b
L		 265 ipv4_address_state = address_state_from_scope(ipv4_scope);
266 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 267 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 268
269 /* Mapping of address and carrier state vs operational state
270 * carrier state
271 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
272 * ------------------------------------------------------------------------------
273 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
274 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
275 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
276 */
84de38c5 277
1678fbb3
YW		 278 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
279 operstate = (LinkOperationalState) carrier_state;
280 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
281 operstate = LINK_OPERSTATE_ROUTABLE;
282 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
283 operstate = LINK_OPERSTATE_DEGRADED;
284 else
14153d1b
YW		 285 operstate = LINK_OPERSTATE_ENSLAVED;
286
bcdcc596
AŠ		 287 /* Only determine online state for managed links with RequiredForOnline=yes */
288 if (!link->network || !link->network->required_for_online)
289 online_state = _LINK_ONLINE_STATE_INVALID;
290 else if (operstate < link->network->required_operstate_for_online.min ||
291 operstate > link->network->required_operstate_for_online.max)
292 online_state = LINK_ONLINE_STATE_OFFLINE;
293 else {
294 AddressFamily required_family = link->network->required_family_for_online;
295 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
296 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
297
298 /* The operational state is within the range required for online.
299 * If a particular address family is also required, we might revert
300 * to offline in the blocks below.
301 */
302 online_state = LINK_ONLINE_STATE_ONLINE;
303
304 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
305 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
306 online_state = LINK_ONLINE_STATE_OFFLINE;
307 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
308 online_state = LINK_ONLINE_STATE_OFFLINE;
309 }
310
311 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
312 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
313 online_state = LINK_ONLINE_STATE_OFFLINE;
314 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
315 online_state = LINK_ONLINE_STATE_OFFLINE;
316 }
317 }
318
35c5a9ca
YW		 319 if (link->carrier_state != carrier_state) {
320 link->carrier_state = carrier_state;
321 changed = true;
322 if (strv_extend(&p, "CarrierState") < 0)
323 log_oom();
324 }
959f65d3 325
35c5a9ca
YW		 326 if (link->address_state != address_state) {
327 link->address_state = address_state;
328 changed = true;
329 if (strv_extend(&p, "AddressState") < 0)
330 log_oom();
959f65d3
YW		 331 }
332
8430841b
L		 333 if (link->ipv4_address_state != ipv4_address_state) {
334 link->ipv4_address_state = ipv4_address_state;
335 changed = true;
336 if (strv_extend(&p, "IPv4AddressState") < 0)
337 log_oom();
338 }
339
340 if (link->ipv6_address_state != ipv6_address_state) {
341 link->ipv6_address_state = ipv6_address_state;
342 changed = true;
343 if (strv_extend(&p, "IPv6AddressState") < 0)
344 log_oom();
345 }
346
84de38c5
TG		 347 if (link->operstate != operstate) {
348 link->operstate = operstate;
35c5a9ca
YW		 349 changed = true;
350 if (strv_extend(&p, "OperationalState") < 0)
351 log_oom();
84de38c5 352 }
959f65d3 353
bcdcc596
AŠ		 354 if (link->online_state != online_state) {
355 link->online_state = online_state;
356 changed = true;
357 if (strv_extend(&p, "OnlineState") < 0)
358 log_oom();
359 }
360
35c5a9ca
YW		 361 if (p)
362 link_send_changed_strv(link, p);
363 if (changed)
364 link_dirty(link);
365
45e11abf 366 if (also_update_master && link->network) {
c0267a59 367 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 368 link_update_master_operstate(link, link->network->bond);
369 link_update_master_operstate(link, link->network->bridge);
959f65d3 370 }
84de38c5
TG		 371}
372
51d18171
TG		 373#define FLAG_STRING(string, flag, old, new) \
374 (((old ^ new) & flag) \
375 ? ((old & flag) ? (" -" string) : (" +" string)) \
376 : "")
377
bb262ef0 378static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 379 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
380 uint8_t operstate;
381 int r;
382
383 assert(link);
384
385 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 386 if (r < 0)
387 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 388
1c4baffc 389 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 390 if (r < 0)
391 /* if we got a message without operstate, take it to mean
392 the state was unchanged */
393 operstate = link->kernel_operstate;
394
bb262ef0 395 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 396 return 0;
397
398 if (link->flags != flags) {
6a7a4e4d 399 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		 400 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
401 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
402 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
403 FLAG_STRING("UP", IFF_UP, link->flags, flags),
404 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
405 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
406 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
407 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
408 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
409 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
410 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
411 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
412 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
413 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
414 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
415 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
416 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
417 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
418 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
419
420 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
421 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
422 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
423 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
424 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
425 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
426 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
427 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
428
429 /* link flags are currently at most 18 bits, let's align to
430 * printing 20 */
431 if (unknown_flags_added)
79008bdd 432 log_link_debug(link,
6a7a4e4d 433 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 434 unknown_flags_added);
435
436 if (unknown_flags_removed)
79008bdd 437 log_link_debug(link,
6a7a4e4d 438 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 439 unknown_flags_removed);
440 }
441
442 link->flags = flags;
443 link->kernel_operstate = operstate;
444
959f65d3 445 link_update_operstate(link, true);
51d18171
TG		 446
447 return 0;
448}
449
15761549
YW		 450void link_ntp_settings_clear(Link *link) {
451 link->ntp = strv_free(link->ntp);
452}
453
454void link_dns_settings_clear(Link *link) {
f5fbe71d 455 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 456 for (unsigned i = 0; i < link->n_dns; i++)
457 in_addr_full_free(link->dns[i]);
15761549 458 link->dns = mfree(link->dns);
f5fbe71d 459 link->n_dns = UINT_MAX;
15761549 460
6e4571f0
YW		 461 link->search_domains = ordered_set_free(link->search_domains);
462 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 463
464 link->dns_default_route = -1;
465 link->llmnr = _RESOLVE_SUPPORT_INVALID;
466 link->mdns = _RESOLVE_SUPPORT_INVALID;
467 link->dnssec_mode = _DNSSEC_MODE_INVALID;
468 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
469
470 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
471}
472
1a6bb31f
YW		 473static void link_free_engines(Link *link) {
474 if (!link)
475 return;
476
477 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
478 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
479 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 480 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 481
482 link->lldp = sd_lldp_unref(link->lldp);
1c494872 483 link_lldp_emit_stop(link);
1a6bb31f
YW		 484
485 ndisc_flush(link);
486
487 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
488 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 489 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 490 link->ndisc = sd_ndisc_unref(link->ndisc);
491 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 492
493 ipv4_dad_unref(link);
1a6bb31f
YW		 494}
495
8301aa0b 496static Link *link_free(Link *link) {
8301aa0b 497 assert(link);
f579559b 498
15761549
YW		 499 link_ntp_settings_clear(link);
500 link_dns_settings_clear(link);
501
8eec0b9d
YW		 502 link->routes = set_free(link->routes);
503 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 504 link->dhcp_routes = set_free(link->dhcp_routes);
505 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 506 link->dhcp6_routes = set_free(link->dhcp6_routes);
507 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
508 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
509 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 510 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 511
8eec0b9d
YW		 512 link->nexthops = set_free(link->nexthops);
513 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 514
8eec0b9d
YW		 515 link->neighbors = set_free(link->neighbors);
516 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 517
8eec0b9d
YW		 518 link->addresses = set_free(link->addresses);
519 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 520 link->pool_addresses = set_free(link->pool_addresses);
e5526518 521 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 522 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
523 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
524 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
525 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 526 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 527
4b409e85
YW		 528 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
529
1a6bb31f 530 link_free_engines(link);
49699bac 531
c166a070 532 free(link->ifname);
572b21d9 533 strv_free(link->alternative_names);
ceac4078 534 free(link->kind);
8d968fdd 535 free(link->ssid);
c643bda5 536 free(link->driver);
6cad256d 537
a34e58d4
YW		 538 unlink_and_free(link->lease_file);
539 unlink_and_free(link->lldp_file);
540 unlink_and_free(link->state_file);
c166a070 541
51517f9e 542 sd_device_unref(link->sd_device);
b5db00e5 543
0d4ad91d 544 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 545 hashmap_free(link->bound_by_links);
546
5f707e12 547 set_free_with_destructor(link->slaves, link_unref);
033295c1 548
c9c908a6
YW		 549 network_unref(link->network);
550
8301aa0b 551 return mfree(link);
14b746f7
TG		 552}
553
8301aa0b 554DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 555
11a7f229
TG		 556int link_get(Manager *m, int ifindex, Link **ret) {
557 Link *link;
11a7f229
TG		 558
559 assert(m);
e856ed00 560 assert(ifindex > 0);
11a7f229 561
ae06ab10 562 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 563 if (!link)
564 return -ENODEV;
565
0b54c870
YW		 566 if (ret)
567 *ret = link;
568 return 0;
569}
570
571int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
572 Link *link;
573
574 assert(m);
575 assert(ifname);
11a7f229 576
0b54c870
YW		 577 link = hashmap_get(m->links_by_name, ifname);
578 if (!link)
579 return -ENODEV;
580
581 if (ret)
582 *ret = link;
11a7f229
TG		 583 return 0;
584}
585
af9ba57a 586void link_set_state(Link *link, LinkState state) {
e331e246
TG		 587 assert(link);
588
589 if (link->state == state)
590 return;
591
0beb9542
YW		 592 log_link_debug(link, "State changed: %s -> %s",
593 link_state_to_string(link->state),
594 link_state_to_string(state));
595
e331e246
TG		 596 link->state = state;
597
598 link_send_changed(link, "AdministrativeState", NULL);
9092113d 599 link_dirty(link);
e331e246
TG		 600}
601
57bd6899
TG		 602static void link_enter_unmanaged(Link *link) {
603 assert(link);
604
e331e246 605 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 606}
607
2a99eed0 608int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 609 int r = 0, k;
610
611 assert(link);
612 assert(link->manager);
613 assert(link->manager->event);
614
80060352
ZJS		 615 bool keep_dhcp = may_keep_dhcp &&
616 link->network &&
617 (link->manager->restarting ||
618 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
619
84add3cd 620 if (!keep_dhcp) {
111bb8f9 621 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 622 if (k < 0)
36c7d709 623 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 624 }
625
84add3cd
YW		 626 k = sd_ipv4acd_stop(link->dhcp_acd);
627 if (k < 0)
628 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 629
2a99eed0
YW		 630 k = sd_dhcp_server_stop(link->dhcp_server);
631 if (k < 0)
632 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
633
9cc65242
YW		 634 k = sd_lldp_stop(link->lldp);
635 if (k < 0)
636 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
637
84add3cd
YW		 638 k = sd_ipv4ll_stop(link->ipv4ll);
639 if (k < 0)
640 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 641
490ccbd5 642 k = ipv4_dad_stop(link);
2488e4d9
YW		 643 if (k < 0)
644 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 645
84add3cd
YW		 646 k = sd_dhcp6_client_stop(link->dhcp6_client);
647 if (k < 0)
648 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 649
2ffd6d73
YW		 650 k = dhcp6_pd_remove(link);
651 if (k < 0)
652 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 653
84add3cd
YW		 654 k = sd_ndisc_stop(link->ndisc);
655 if (k < 0)
656 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 657
84add3cd
YW		 658 k = sd_radv_stop(link->radv);
659 if (k < 0)
660 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 661
7272b25e 662 link_lldp_emit_stop(link);
111bb8f9
TG		 663 return r;
664}
665
b22d8a00 666void link_enter_failed(Link *link) {
ef1ba606 667 assert(link);
f882c247 668
370e9930 669 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 670 return;
671
6a7a4e4d 672 log_link_warning(link, "Failed");
449f7554 673
e331e246 674 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 675
2a99eed0 676 (void) link_stop_engines(link, false);
f882c247
TG		 677}
678
7033af49
YW		 679static int link_join_netdevs_after_configured(Link *link) {
680 NetDev *netdev;
7033af49
YW		 681 int r;
682
90e74a66 683 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 684 if (netdev->ifindex > 0)
685 /* Assume already enslaved. */
686 continue;
687
688 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
689 continue;
690
691 log_struct(LOG_DEBUG,
692 LOG_LINK_INTERFACE(link),
693 LOG_NETDEV_INTERFACE(netdev),
694 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
695
696 r = netdev_join(netdev, link, NULL);
697 if (r < 0)
698 return log_struct_errno(LOG_WARNING, r,
699 LOG_LINK_INTERFACE(link),
700 LOG_NETDEV_INTERFACE(netdev),
701 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
702 }
703
704 return 0;
705}
706
e3a7b048 707static void link_enter_configured(Link *link) {
dd43110f
TG		 708 assert(link);
709 assert(link->network);
e3a7b048 710
289e6774 711 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 712 return;
dd43110f 713
e331e246 714 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 715
7033af49 716 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 717}
718
6accfd31
DA		 719void link_check_ready(Link *link) {
720 Address *a;
6accfd31
DA		 721
722 assert(link);
723
5f58af25
YW		 724 if (link->state == LINK_STATE_CONFIGURED)
725 return;
726
d19b9939
YW		 727 if (link->state != LINK_STATE_CONFIGURING)
728 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 729
730 if (!link->network)
731 return;
732
600b7898
YW		 733 if (link->iftype == ARPHRD_CAN) {
734 /* let's shortcut things for CAN which doesn't need most of checks below. */
735 if (!link->can_configured)
736 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
737
738 link_enter_configured(link);
739 return;
740 }
741
76c5a0f2 742 if (!link->static_addresses_configured)
d19b9939 743 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 744
90e74a66 745 SET_FOREACH(a, link->addresses)
39373cb9
YW		 746 if (!address_is_ready(a)) {
747 _cleanup_free_ char *str = NULL;
748
5380707a
YW		 749 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
750 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 751 }
6aa5773b 752
354bc760
YW		 753 if (!link->static_address_labels_configured)
754 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
755
e5b35bf6
YW		 756 if (!link->static_bridge_fdb_configured)
757 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
758
ff9e0783
YW		 759 if (!link->static_bridge_mdb_configured)
760 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
761
fdeba3f5
YW		 762 if (!link->static_ipv6_proxy_ndp_configured)
763 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
764
40ca350e
YW		 765 if (!link->static_neighbors_configured)
766 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
767
d19b9939
YW		 768 if (!link->static_nexthops_configured)
769 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 770
76c5a0f2
YW		 771 if (!link->static_routes_configured)
772 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
773
0e5ef6be 774 if (!link->static_routing_policy_rules_configured)
d19b9939 775 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 776
d19b9939
YW		 777 if (!link->tc_configured)
778 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 779
d19b9939
YW		 780 if (!link->sr_iov_configured)
781 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 782
463797c1 783 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 784 bool has_ndisc_address = false;
785 NDiscAddress *n;
6accfd31 786
94876904
YW		 787 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
788 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 789
90e74a66 790 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 791 if (!n->marked) {
792 has_ndisc_address = true;
793 break;
794 }
795
8cd37e43 796 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 797 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 798 !link->ipv4ll_address_configured)
799 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
800 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 801
0d0799da
YW		 802 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
803 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 804 if (!link->dhcp4_configured &&
805 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
806 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 807 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 808 !link->ipv4ll_address_configured)
809 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 810 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 811
0d0799da 812 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		 813 __func__,
814 yes_no(link->dhcp4_configured),
0d0799da 815 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 816 yes_no(link->dhcp6_address_configured),
817 yes_no(link->dhcp6_route_configured),
818 yes_no(link->dhcp6_pd_address_configured),
819 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 820 yes_no(link->ndisc_addresses_configured),
821 yes_no(link->ndisc_routes_configured));
39373cb9 822 }
463797c1 823 }
6accfd31 824
5f58af25 825 link_enter_configured(link);
6accfd31
DA		 826}
827
97108953 828static int link_request_static_configs(Link *link) {
f882c247
TG		 829 int r;
830
831 assert(link);
832 assert(link->network);
f5be5601 833 assert(link->state != _LINK_STATE_INVALID);
f882c247 834
354bc760 835 r = link_request_static_addresses(link);
0e5ef6be
YW		 836 if (r < 0)
837 return r;
838
354bc760 839 r = link_request_static_address_labels(link);
f3ef324d
YW		 840 if (r < 0)
841 return r;
e4a71bf3 842
e5b35bf6
YW		 843 r = link_request_static_bridge_fdb(link);
844 if (r < 0)
845 return r;
846
9a038aac
YW		 847 r = link_request_static_bridge_mdb(link);
848 if (r < 0)
849 return r;
850
fdeba3f5
YW		 851 r = link_request_static_ipv6_proxy_ndp_addresses(link);
852 if (r < 0)
853 return r;
854
40ca350e 855 r = link_request_static_neighbors(link);
682c65b0
YW		 856 if (r < 0)
857 return r;
bd6379ec 858
76c5a0f2 859 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 860 if (r < 0)
861 return r;
f882c247 862
76c5a0f2
YW		 863 r = link_request_static_routes(link, false);
864 if (r < 0)
865 return r;
866
867 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 868 if (r < 0)
869 return r;
d4cdbea5 870
f882c247
TG		 871 return 0;
872}
873
3a390124 874static int link_configure_continue(Link *link);
55dc8c4a 875
e16e4b3b
DS		 876static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
877 int r;
878
879 assert(link);
880
881 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
882 return 1;
883
884 r = sd_netlink_message_get_errno(m);
885 if (r < 0)
886 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
887 else
888 log_link_debug(link, "Setting MAC address done.");
889
890 return 1;
891}
892
893static int link_set_mac(Link *link) {
894 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
895 int r;
896
897 assert(link);
898 assert(link->network);
899 assert(link->manager);
900 assert(link->manager->rtnl);
901
902 if (!link->network->mac)
903 return 0;
904
905 log_link_debug(link, "Setting MAC address");
906
907 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
908 if (r < 0)
909 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
910
911 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
912 if (r < 0)
913 return log_link_error_errno(link, r, "Could not set MAC address: %m");
914
915 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
916 link_netlink_destroy_callback, link);
917 if (r < 0)
918 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
919
920 link_ref(link);
921
922 return 0;
923}
924
925static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
926 int r;
927
928 assert(link);
929
930 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
931 return 1;
932
933 r = sd_netlink_message_get_errno(m);
934 if (r < 0)
935 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
936 else
937 log_link_debug(link, "Setting nomaster done.");
938
939 return 1;
940}
941
942static int link_set_nomaster(Link *link) {
943 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
944 int r;
945
946 assert(link);
947 assert(link->network);
948 assert(link->manager);
949 assert(link->manager->rtnl);
950
951 /* set it free if not enslaved with networkd */
c0267a59 952 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 953 return 0;
954
955 log_link_debug(link, "Setting nomaster");
956
957 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
958 if (r < 0)
959 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
960
961 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
962 if (r < 0)
963 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
964
965 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
966 link_netlink_destroy_callback, link);
967 if (r < 0)
968 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
969
970 link_ref(link);
971
972 return 0;
973}
974
302a796f 975static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 976 int r;
977
978 assert(m);
979 assert(link);
980 assert(link->ifname);
981
55dc8c4a
YW		 982 link->setting_mtu = false;
983
5da8149f 984 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 985 return 1;
986
1c4baffc 987 r = sd_netlink_message_get_errno(m);
4ff296b0 988 if (r < 0)
5ecb131d 989 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 990 else
991 log_link_debug(link, "Setting MTU done.");
55dc8c4a 992
4ff296b0 993 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 994 r = link_configure_continue(link);
4ff296b0
YW		 995 if (r < 0)
996 link_enter_failed(link);
997 }
4f882b2a
TG		 998
999 return 1;
1000}
1001
933c70a0 1002int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1003 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1004 int r;
1005
1006 assert(link);
1007 assert(link->manager);
1008 assert(link->manager->rtnl);
1009
40288ece
YW		 1010 if (mtu == 0 || link->setting_mtu)
1011 return 0;
1012
933c70a0 1013 if (link->mtu == mtu)
ee493106
YW		 1014 return 0;
1015
6a7a4e4d 1016 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1017
6a7a4e4d
LP		 1018 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1019 if (r < 0)
1020 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1021
44b598a1 1022 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1023 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1024 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1025
1026 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1027 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1028
72c2500b 1029 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1030 }
1031
1c4baffc 1032 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1033 if (r < 0)
1034 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1035
302a796f
YW		 1036 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1037 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1038 if (r < 0)
1039 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1040
ae941762 1041 link_ref(link);
1046bf9b 1042 link->setting_mtu = true;
b226d99b 1043
4f882b2a
TG		 1044 return 0;
1045}
1046
f6fcc1c2
YW		 1047static bool link_reduces_vlan_mtu(Link *link) {
1048 /* See netif_reduces_vlan_mtu() in kernel. */
1049 return streq_ptr(link->kind, "macsec");
1050}
1051
1052static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1053 uint32_t mtu = 0;
1054 NetDev *dev;
f6fcc1c2 1055
90e74a66 1056 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1057 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1058 /* See vlan_dev_change_mtu() in kernel. */
1059 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1060
1061 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1062 /* See macvlan_change_mtu() in kernel. */
1063 mtu = dev->mtu;
1064
1065 return mtu;
1066}
1067
1068static int link_configure_mtu(Link *link) {
1069 uint32_t mtu;
1070
1071 assert(link);
1072 assert(link->network);
1073
1074 if (link->network->mtu > 0)
1075 return link_set_mtu(link, link->network->mtu);
1076
1077 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1078 if (link->mtu >= mtu)
1079 return 0;
1080
1081 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1082 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1083 link->mtu, mtu);
1084
1085 return link_set_mtu(link, mtu);
1086}
1087
302a796f 1088static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1089 int r;
1090
1091 assert(m);
1092 assert(link);
1093 assert(link->ifname);
1094
1095 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1096 return 1;
1097
1098 r = sd_netlink_message_get_errno(m);
1099 if (r < 0)
5ecb131d 1100 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1101
1102 return 1;
1103}
1104
1105static int link_set_flags(Link *link) {
1106 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1107 unsigned ifi_change = 0;
1108 unsigned ifi_flags = 0;
1109 int r;
1110
1111 assert(link);
1112 assert(link->manager);
1113 assert(link->manager->rtnl);
1114
1115 if (link->flags & IFF_LOOPBACK)
1116 return 0;
1117
1118 if (!link->network)
1119 return 0;
1120
937e305e
SS		 1121 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1122 link->network->promiscuous < 0)
99d2baa2
SS		 1123 return 0;
1124
1125 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1126 if (r < 0)
1127 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1128
1129 if (link->network->arp >= 0) {
1130 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1131 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1132 }
1133
1134 if (link->network->multicast >= 0) {
1135 ifi_change |= IFF_MULTICAST;
1136 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1137 }
1138
866e6b7a
SS		 1139 if (link->network->allmulticast >= 0) {
1140 ifi_change |= IFF_ALLMULTI;
1141 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1142 }
1143
937e305e
SS		 1144 if (link->network->promiscuous >= 0) {
1145 ifi_change |= IFF_PROMISC;
1146 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1147 }
1148
99d2baa2
SS		 1149 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1150 if (r < 0)
1151 return log_link_error_errno(link, r, "Could not set link flags: %m");
1152
302a796f
YW		 1153 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1154 link_netlink_destroy_callback, link);
99d2baa2
SS		 1155 if (r < 0)
1156 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1157
1158 link_ref(link);
1159
1160 return 0;
1161}
1162
8566df79 1163static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 1164 int r;
1165
1166 assert(link);
1167
086b8853 1168 if (link->radv) {
7465dd22 1169 assert(link->radv);
94876904 1170 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1171
1172 log_link_debug(link, "Starting IPv6 Router Advertisements");
1173
fd3ef936
YW		 1174 r = radv_emit_dns(link);
1175 if (r < 0)
1176 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1177
7465dd22
PF		 1178 r = sd_radv_start(link->radv);
1179 if (r < 0 && r != -EBUSY)
1180 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1181 }
1182
294f129b
YW		 1183 r = ndisc_start(link);
1184 if (r < 0)
1185 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 1186
294f129b
YW		 1187 r = dhcp6_start(link);
1188 if (r < 0)
1189 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 1190
1633c457
YW		 1191 r = dhcp6_request_prefix_delegation(link);
1192 if (r < 0)
1193 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1194
e7ab854c
TG		 1195 return 0;
1196}
1197
8566df79 1198static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 1199 int r;
1200
1201 assert(link);
ff254138
TG		 1202 assert(link->manager);
1203 assert(link->manager->event);
1204
0107b769 1205 if (link->dhcp_client) {
294f129b 1206 r = dhcp4_start(link);
0107b769 1207 if (r < 0)
294f129b 1208 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 1209
0b4b66cc 1210 } else if (link->ipv4ll) {
6a7a4e4d 1211 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1212
1213 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1214 if (r < 0)
1215 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1216 }
1217
ab486ef4
YW		 1218 if (link->dhcp_server) {
1219 r = sd_dhcp_server_start(link->dhcp_server);
1220 if (r < 0)
1221 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
1222 }
1223
6fc25497
SS		 1224 return 0;
1225}
1226
8566df79 1227static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 1228 int r;
1229
1230 assert(link);
1231
8566df79 1232 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 1233 if (r < 0)
1234 return r;
1235
94876904 1236 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 1237 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 1238 if (r < 0)
1239 return r;
1240 }
1241
2ffd6d73
YW		 1242 r = link_lldp_emit_start(link);
1243 if (r < 0)
1244 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1245
ff254138
TG		 1246 return 0;
1247}
1248
a61bb41c 1249bool link_has_carrier(Link *link) {
deb2e523
TG		 1250 /* see Documentation/networking/operstates.txt in the kernel sources */
1251
a61bb41c 1252 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1253 return true;
1254
a61bb41c 1255 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1256 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1257 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1258 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1259 return true;
1260
1261 return false;
1262}
1263
0e2fdb83
SS		 1264static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1265 int r;
1266
1267 assert(link);
1268
9524014e
DS		 1269 link->setting_genmode = false;
1270
0e2fdb83
SS		 1271 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1272 return 1;
1273
1274 r = sd_netlink_message_get_errno(m);
1275 if (r < 0)
5ecb131d 1276 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1277 else
1278 log_link_debug(link, "Setting address genmode done.");
1279
1280 if (link->state == LINK_STATE_INITIALIZED) {
1281 r = link_configure_continue(link);
1282 if (r < 0)
1283 link_enter_failed(link);
1284 }
0e2fdb83
SS		 1285
1286 return 1;
1287}
1288
1289static int link_configure_addrgen_mode(Link *link) {
1290 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1291 uint8_t ipv6ll_mode;
1292 int r;
1293
1294 assert(link);
1295 assert(link->network);
1296 assert(link->manager);
1297 assert(link->manager->rtnl);
1298
9524014e 1299 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1300 return 0;
1301
0e2fdb83
SS		 1302 log_link_debug(link, "Setting address genmode for link");
1303
1304 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1305 if (r < 0)
1306 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1307
1308 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1309 if (r < 0)
1310 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1311
1312 r = sd_netlink_message_open_container(req, AF_INET6);
1313 if (r < 0)
1314 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1315
1316 if (!link_ipv6ll_enabled(link))
1317 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1318 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1319 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1320 if (r < 0) {
1321 /* The file may not exist. And even if it exists, when stable_secret is unset,
0e275271
YW		 1322 * reading the file fails with ENOMEM when read_full_virtual_file(), which uses
1323 * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
1324 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
a6f1848a
SS		 1325
1326 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1327 } else
1328 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1329 } else
6f6296b9 1330 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1331
1332 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1333 if (r < 0)
1334 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1335
1336 r = sd_netlink_message_close_container(req);
1337 if (r < 0)
1338 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1339
1340 r = sd_netlink_message_close_container(req);
1341 if (r < 0)
1342 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1343
1344 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1345 link_netlink_destroy_callback, link);
1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1348
1349 link_ref(link);
9524014e 1350 link->setting_genmode = true;
0e2fdb83
SS		 1351
1352 return 0;
1353}
1354
302a796f 1355static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1356 int r;
1357
1746cf2a
TG		 1358 assert(link);
1359
5da8149f 1360 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1361 return 1;
1362
1c4baffc 1363 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1364 if (r < 0)
26d6b214 1365 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1366 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1367
f882c247
TG		 1368 return 1;
1369}
1370
f282ce20 1371int link_up(Link *link) {
4afd3348 1372 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1373 int r;
1374
f882c247 1375 assert(link);
c106cc36 1376 assert(link->network);
f882c247
TG		 1377 assert(link->manager);
1378 assert(link->manager->rtnl);
1379
6a7a4e4d 1380 log_link_debug(link, "Bringing link up");
449f7554 1381
6a7a4e4d
LP		 1382 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1385
5d4795f3 1386 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1387 if (r < 0)
1388 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1389
302a796f
YW		 1390 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1391 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1392 if (r < 0)
1393 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1394
b226d99b
TG		 1395 link_ref(link);
1396
f882c247
TG		 1397 return 0;
1398}
1399
302a796f 1400static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1401 int r;
1402
1403 assert(link);
1404
1405 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1406 return 1;
1407
1c4baffc 1408 r = sd_netlink_message_get_errno(m);
0d4ad91d 1409 if (r < 0)
5ecb131d 1410 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1411
1412 return 1;
1413}
1414
8e54db83 1415int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1416 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1417 int r;
1418
1419 assert(link);
1420 assert(link->manager);
1421 assert(link->manager->rtnl);
1422
6a7a4e4d 1423 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1424
1425 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1426 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1427 if (r < 0)
1428 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1429
1430 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1433
8e54db83
YW		 1434 r = netlink_call_async(link->manager->rtnl, NULL, req,
1435 callback ?: link_down_handler,
302a796f 1436 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1437 if (r < 0)
1438 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1439
1440 link_ref(link);
1441
1442 return 0;
1443}
1444
89fe6535
SS		 1445static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1446 int r;
1447
1448 assert(link);
1449
1450 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1451 return 1;
1452
1453 r = sd_netlink_message_get_errno(m);
1454 if (r < 0)
1455 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1456
1457 return 1;
1458}
1459
1460static int link_set_group(Link *link) {
1461 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1462 int r;
1463
1464 assert(link);
1465 assert(link->network);
1466 assert(link->manager);
1467 assert(link->manager->rtnl);
1468
f0c09831 1469 if (!link->network->group_set)
89fe6535
SS		 1470 return 0;
1471
1472 log_link_debug(link, "Setting group");
1473
1474 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1475 if (r < 0)
1476 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1477
1478 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1479 if (r < 0)
1480 return log_link_error_errno(link, r, "Could not set link group: %m");
1481
1482 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1483 link_netlink_destroy_callback, link);
1484 if (r < 0)
1485 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1486
1487 link_ref(link);
1488
1489 return 0;
1490}
1491
0d4ad91d
AR		 1492static int link_handle_bound_to_list(Link *link) {
1493 Link *l;
0d4ad91d
AR		 1494 int r;
1495 bool required_up = false;
1496 bool link_is_up = false;
1497
1498 assert(link);
1499
1500 if (hashmap_isempty(link->bound_to_links))
1501 return 0;
1502
1503 if (link->flags & IFF_UP)
1504 link_is_up = true;
1505
90e74a66 1506 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1507 if (link_has_carrier(l)) {
1508 required_up = true;
1509 break;
1510 }
1511
1512 if (!required_up && link_is_up) {
8e54db83 1513 r = link_down(link, NULL);
0d4ad91d
AR		 1514 if (r < 0)
1515 return r;
1516 } else if (required_up && !link_is_up) {
1517 r = link_up(link);
1518 if (r < 0)
1519 return r;
1520 }
1521
1522 return 0;
1523}
1524
1525static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1526 Link *l;
1527 int r;
1528
1529 assert(link);
1530
1531 if (hashmap_isempty(link->bound_by_links))
1532 return 0;
1533
90e74a66 1534 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1535 r = link_handle_bound_to_list(l);
1536 if (r < 0)
1537 return r;
1538 }
1539
1540 return 0;
1541}
1542
1543static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1544 int r;
1545
1546 assert(link);
1547 assert(carrier);
1548
1549 if (link == carrier)
1550 return 0;
1551
1552 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1553 return 0;
1554
190b3b5c 1555 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1556 if (r < 0)
1557 return r;
1558
9092113d
YW		 1559 link_dirty(link);
1560
0d4ad91d
AR		 1561 return 0;
1562}
1563
1564static int link_new_bound_by_list(Link *link) {
1565 Manager *m;
1566 Link *carrier;
0d4ad91d 1567 int r;
0d4ad91d
AR		 1568
1569 assert(link);
1570 assert(link->manager);
1571
1572 m = link->manager;
1573
90e74a66 1574 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1575 if (!carrier->network)
1576 continue;
1577
1578 if (strv_isempty(carrier->network->bind_carrier))
1579 continue;
1580
191a3f16 1581 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1582 r = link_put_carrier(link, carrier, &link->bound_by_links);
1583 if (r < 0)
1584 return r;
0d4ad91d
AR		 1585 }
1586 }
1587
90e74a66 1588 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1589 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1590 if (r < 0)
1591 return r;
0d4ad91d
AR		 1592 }
1593
1594 return 0;
1595}
1596
1597static int link_new_bound_to_list(Link *link) {
1598 Manager *m;
1599 Link *carrier;
0d4ad91d 1600 int r;
0d4ad91d
AR		 1601
1602 assert(link);
1603 assert(link->manager);
1604
1605 if (!link->network)
1606 return 0;
1607
1608 if (strv_isempty(link->network->bind_carrier))
1609 return 0;
1610
1611 m = link->manager;
1612
90e74a66 1613 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1614 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1615 r = link_put_carrier(link, carrier, &link->bound_to_links);
1616 if (r < 0)
1617 return r;
0d4ad91d
AR		 1618 }
1619 }
1620
90e74a66 1621 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1622 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1623 if (r < 0)
1624 return r;
0d4ad91d
AR		 1625 }
1626
1627 return 0;
1628}
1629
1630static int link_new_carrier_maps(Link *link) {
1631 int r;
1632
1633 r = link_new_bound_by_list(link);
1634 if (r < 0)
1635 return r;
1636
1637 r = link_handle_bound_by_list(link);
1638 if (r < 0)
1639 return r;
1640
1641 r = link_new_bound_to_list(link);
1642 if (r < 0)
1643 return r;
1644
1645 r = link_handle_bound_to_list(link);
1646 if (r < 0)
1647 return r;
1648
1649 return 0;
1650}
1651
1652static void link_free_bound_to_list(Link *link) {
9092113d 1653 bool updated = false;
0d4ad91d 1654 Link *bound_to;
0d4ad91d 1655
9092113d
YW		 1656 assert(link);
1657
1658 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1659 updated = true;
0d4ad91d
AR		 1660
1661 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1662 link_dirty(bound_to);
0d4ad91d
AR		 1663 }
1664
9092113d
YW		 1665 if (updated)
1666 link_dirty(link);
1667
0d4ad91d
AR		 1668 return;
1669}
1670
1671static void link_free_bound_by_list(Link *link) {
9092113d 1672 bool updated = false;
0d4ad91d 1673 Link *bound_by;
0d4ad91d 1674
9092113d
YW		 1675 assert(link);
1676
1677 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1678 updated = true;
0d4ad91d
AR		 1679
1680 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1681 link_dirty(bound_by);
0d4ad91d
AR		 1682 link_handle_bound_to_list(bound_by);
1683 }
1684 }
1685
9092113d
YW		 1686 if (updated)
1687 link_dirty(link);
1688
0d4ad91d
AR		 1689 return;
1690}
1691
1692static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1693 assert(link);
1694
9092113d
YW		 1695 link_free_bound_to_list(link);
1696 link_free_bound_by_list(link);
0d4ad91d
AR		 1697
1698 return;
1699}
1700
5f707e12
YW		 1701static int link_append_to_master(Link *link, NetDev *netdev) {
1702 Link *master;
1703 int r;
1704
1705 assert(link);
1706 assert(netdev);
1707
1708 r = link_get(link->manager, netdev->ifindex, &master);
1709 if (r < 0)
1710 return r;
1711
de7fef4b 1712 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1713 if (r <= 0)
5f707e12
YW		 1714 return r;
1715
1716 link_ref(link);
1717 return 0;
1718}
1719
1720static void link_drop_from_master(Link *link, NetDev *netdev) {
1721 Link *master;
1722
1723 assert(link);
1724
1725 if (!link->manager || !netdev)
1726 return;
1727
1728 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1729 return;
1730
1731 link_unref(set_remove(master->slaves, link));
1732}
1733
56001f02
YW		 1734static void link_drop_requests(Link *link) {
1735 Request *req;
1736
1737 assert(link);
1738 assert(link->manager);
1739
1740 ORDERED_SET_FOREACH(req, link->manager->request_queue)
1741 if (req->link == link)
1742 request_drop(req);
1743}
1744
cc2d7efc
YW		 1745
1746static Link *link_drop(Link *link) {
0b54c870
YW		 1747 char **n;
1748
63130eb3 1749 if (!link)
cc2d7efc 1750 return NULL;
0d4ad91d 1751
63130eb3
YW		 1752 assert(link->manager);
1753
0d4ad91d
AR		 1754 link_set_state(link, LINK_STATE_LINGER);
1755
63130eb3
YW		 1756 /* Drop all references from other links and manager. Note that async netlink calls may have
1757 * references to the link, and they will be dropped when we receive replies. */
1758
56001f02
YW		 1759 link_drop_requests(link);
1760
0d4ad91d
AR		 1761 link_free_carrier_maps(link);
1762
5f707e12 1763 if (link->network) {
c0267a59 1764 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1765 link_drop_from_master(link, link->network->bridge);
1766 link_drop_from_master(link, link->network->bond);
1767 }
1768
63130eb3 1769 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 1770
db2f8a2e 1771 (void) unlink(link->state_file);
63130eb3
YW		 1772 link_clean(link);
1773
0b54c870
YW		 1774 STRV_FOREACH(n, link->alternative_names)
1775 hashmap_remove(link->manager->links_by_name, *n);
1776
1777 hashmap_remove(link->manager->links_by_name, link->ifname);
1778
63130eb3
YW		 1779 /* The following must be called at last. */
1780 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1781 return link_unref(link);
0d4ad91d
AR		 1782}
1783
04952b25 1784int link_activate(Link *link) {
f882c247
TG		 1785 int r;
1786
ef1ba606 1787 assert(link);
f5be5601 1788 assert(link->network);
dd3efc09 1789
61135582
DS		 1790 switch (link->network->activation_policy) {
1791 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1792 r = link_handle_bound_to_list(link);
1793 if (r < 0)
1794 return r;
61135582
DS		 1795 break;
1796 case ACTIVATION_POLICY_UP:
1797 if (link->activated)
1798 break;
1799 _fallthrough_;
1800 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1801 r = link_up(link);
04952b25 1802 if (r < 0)
505f8da7 1803 return r;
61135582
DS		 1804 break;
1805 case ACTIVATION_POLICY_DOWN:
1806 if (link->activated)
1807 break;
1808 _fallthrough_;
1809 case ACTIVATION_POLICY_ALWAYS_DOWN:
1810 r = link_down(link, NULL);
04952b25 1811 if (r < 0)
61135582 1812 return r;
61135582
DS		 1813 break;
1814 default:
1815 break;
ef1ba606 1816 }
61135582 1817 link->activated = true;
f882c247 1818
04952b25
YW		 1819 return 0;
1820}
1821
1822static int link_joined(Link *link) {
1823 int r;
1824
1825 assert(link);
1826 assert(link->network);
1827
1828 r = link_activate(link);
1829 if (r < 0)
1830 return r;
1831
97108953
YW		 1832 link_set_state(link, LINK_STATE_CONFIGURING);
1833
9ed794a3 1834 if (link->network->bridge) {
e1853b00 1835 r = link_set_bridge(link);
6a7a4e4d
LP		 1836 if (r < 0)
1837 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1838
1839 r = link_append_to_master(link, link->network->bridge);
1840 if (r < 0)
1841 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1842 }
1843
eb64b435 1844 if (link->network->bond) {
7fcee284 1845 r = link_set_bond(link);
eb64b435
SS		 1846 if (r < 0)
1847 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1848
45e11abf 1849 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1850 if (r < 0)
1851 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1852 }
1853
34d7f2c9
YW		 1854 r = link_set_bridge_vlan(link);
1855 if (r < 0)
1856 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1857
97108953 1858 r = link_request_static_configs(link);
0e569a43
YW		 1859 if (r < 0)
1860 return r;
1861
97108953
YW		 1862 if (!link_has_carrier(link))
1863 return 0;
1864
8566df79 1865 return link_acquire_dynamic_conf(link);
02b59d57
TG		 1866}
1867
302a796f 1868static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1869 int r;
1870
1746cf2a 1871 assert(link);
ef1ba606 1872 assert(link->network);
34bf3c00 1873 assert(link->enslaving > 0);
02b59d57 1874
313cefa1 1875 link->enslaving--;
52433f6b 1876
5da8149f 1877 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1878 return 1;
1879
1c4baffc 1880 r = sd_netlink_message_get_errno(m);
856f962c 1881 if (r < 0 && r != -EEXIST) {
5ecb131d 1882 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1883 link_enter_failed(link);
1884 return 1;
4ff296b0
YW		 1885 }
1886
1887 log_link_debug(link, "Joined netdev");
02b59d57 1888
34bf3c00 1889 if (link->enslaving == 0) {
4ff296b0
YW		 1890 r = link_joined(link);
1891 if (r < 0)
1892 link_enter_failed(link);
34bf3c00 1893 }
02b59d57
TG		 1894
1895 return 1;
1896}
1897
3f265037 1898static int link_enter_join_netdev(Link *link) {
6a0a2f86 1899 NetDev *netdev;
02b59d57
TG		 1900 int r;
1901
1902 assert(link);
1903 assert(link->network);
bd08ce56 1904 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1905
289e6774 1906 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1907
34bf3c00 1908 link->enslaving = 0;
02b59d57 1909
d9c67ea1 1910 if (link->network->bond) {
cbff7170
TJ		 1911 if (link->network->bond->state == NETDEV_STATE_READY &&
1912 link->network->bond->ifindex == link->master_ifindex)
1913 return link_joined(link);
1914
f2341e0a
LP		 1915 log_struct(LOG_DEBUG,
1916 LOG_LINK_INTERFACE(link),
1917 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1918 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1919
34bf3c00
YW		 1920 link->enslaving++;
1921
f2341e0a 1922 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1923 if (r < 0) {
f2341e0a
LP		 1924 log_struct_errno(LOG_WARNING, r,
1925 LOG_LINK_INTERFACE(link),
1926 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1927 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1928 link_enter_failed(link);
1929 return r;
c0267a59
AW		 1930 }
1931 }
1932
1933 if (link->network->batadv) {
1934 log_struct(LOG_DEBUG,
1935 LOG_LINK_INTERFACE(link),
1936 LOG_NETDEV_INTERFACE(link->network->batadv),
1937 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1938
1939 link->enslaving++;
1940
1941 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1942 if (r < 0) {
1943 log_struct_errno(LOG_WARNING, r,
1944 LOG_LINK_INTERFACE(link),
1945 LOG_NETDEV_INTERFACE(link->network->batadv),
1946 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1947 link_enter_failed(link);
1948 return r;
52433f6b 1949 }
0ad6148e
MO		 1950 }
1951
d9c67ea1 1952 if (link->network->bridge) {
f2341e0a
LP		 1953 log_struct(LOG_DEBUG,
1954 LOG_LINK_INTERFACE(link),
1955 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1956 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1957
34bf3c00
YW		 1958 link->enslaving++;
1959
f2341e0a 1960 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1961 if (r < 0) {
f2341e0a
LP		 1962 log_struct_errno(LOG_WARNING, r,
1963 LOG_LINK_INTERFACE(link),
1964 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1965 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1966 link_enter_failed(link);
1967 return r;
1968 }
52433f6b
TG		 1969 }
1970
6cb955c6
AR		 1971 if (link->network->vrf) {
1972 log_struct(LOG_DEBUG,
1973 LOG_LINK_INTERFACE(link),
1974 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1975 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1976
34bf3c00
YW		 1977 link->enslaving++;
1978
6cb955c6
AR		 1979 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1980 if (r < 0) {
1981 log_struct_errno(LOG_WARNING, r,
1982 LOG_LINK_INTERFACE(link),
1983 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1984 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1985 link_enter_failed(link);
1986 return r;
1987 }
6cb955c6
AR		 1988 }
1989
90e74a66 1990 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1991
2b6db913
YW		 1992 if (netdev->ifindex > 0)
1993 /* Assume already enslaved. */
a63e5daa 1994 continue;
a63e5daa 1995
7033af49
YW		 1996 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1997 continue;
1998
f2341e0a
LP		 1999 log_struct(LOG_DEBUG,
2000 LOG_LINK_INTERFACE(link),
2001 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2002 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2003
34bf3c00
YW		 2004 link->enslaving++;
2005
f2341e0a 2006 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2007 if (r < 0) {
f2341e0a
LP		 2008 log_struct_errno(LOG_WARNING, r,
2009 LOG_LINK_INTERFACE(link),
2010 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2011 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2012 link_enter_failed(link);
2013 return r;
2014 }
326cb406
SS		 2015 }
2016
34bf3c00
YW		 2017 if (link->enslaving == 0)
2018 return link_joined(link);
2019
ef1ba606
TG		 2020 return 0;
2021}
2022
5e5b137a 2023static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2024 int k, r;
2025
2026 assert(link);
2027 assert(link->manager);
5e5b137a 2028
e36d601c 2029 r = link_drop_foreign_routes(link);
5e5b137a 2030
e36d601c 2031 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2032 if (k < 0 && r >= 0)
2033 r = k;
2034
e36d601c 2035 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2036 if (k < 0 && r >= 0)
2037 r = k;
d1bdafd2 2038
e36d601c 2039 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2040 if (k < 0 && r >= 0)
2041 r = k;
2042
0b81225e
YW		 2043 k = manager_drop_foreign_routing_policy_rules(link->manager);
2044 if (k < 0 && r >= 0)
2045 r = k;
2046
2047 return r;
5e5b137a
TG		 2048}
2049
3104883d 2050static int link_drop_config(Link *link) {
0b81225e
YW		 2051 int k, r;
2052
2053 assert(link);
2054 assert(link->manager);
3104883d 2055
e36d601c 2056 r = link_drop_routes(link);
3104883d 2057
e36d601c 2058 k = link_drop_nexthops(link);
0b81225e
YW		 2059 if (k < 0 && r >= 0)
2060 r = k;
d1bdafd2 2061
e36d601c 2062 k = link_drop_addresses(link);
0b81225e
YW		 2063 if (k < 0 && r >= 0)
2064 r = k;
2065
e36d601c 2066 k = link_drop_neighbors(link);
25b82b6e
YW		 2067 if (k < 0 && r >= 0)
2068 r = k;
2069
0b81225e
YW		 2070 k = manager_drop_routing_policy_rules(link->manager, link);
2071 if (k < 0 && r >= 0)
2072 r = k;
3104883d 2073
c69305ff
LP		 2074 ndisc_flush(link);
2075
0b81225e 2076 return r;
3104883d
SS		 2077}
2078
c3b94251 2079static int link_configure(Link *link) {
4ecdcb07
YW		 2080 int r;
2081
ef1ba606 2082 assert(link);
b22d8a00 2083 assert(link->network);
bd08ce56 2084 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2085
34658df2 2086 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2087 if (r < 0)
2088 return r;
2089
518cd6b5
SS		 2090 r = link_configure_sr_iov(link);
2091 if (r < 0)
2092 return r;
2093
500b96eb 2094 if (link->iftype == ARPHRD_CAN)
600b7898 2095 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2096 return link_configure_can(link);
92c918b0 2097
5e0534f1 2098 r = link_set_sysctl(link);
b69c3180
SS		 2099 if (r < 0)
2100 return r;
8749cbcd 2101
e16e4b3b
DS		 2102 r = link_set_mac(link);
2103 if (r < 0)
2104 return r;
2105
2106 r = link_set_nomaster(link);
2107 if (r < 0)
2108 return r;
2109
99d2baa2
SS		 2110 r = link_set_flags(link);
2111 if (r < 0)
2112 return r;
2113
89fe6535
SS		 2114 r = link_set_group(link);
2115 if (r < 0)
2116 return r;
2117
2ffd6d73
YW		 2118 r = ipv4ll_configure(link);
2119 if (r < 0)
2120 return r;
64b21ece 2121
2ffd6d73
YW		 2122 r = dhcp4_configure(link);
2123 if (r < 0)
2124 return r;
eb34d4af 2125
2ffd6d73
YW		 2126 r = dhcp6_configure(link);
2127 if (r < 0)
2128 return r;
f5a8c43f 2129
2ffd6d73
YW		 2130 r = ndisc_configure(link);
2131 if (r < 0)
2132 return r;
4138fb2c 2133
1d28a3cf
YW		 2134 r = link_request_dhcp_server(link);
2135 if (r < 0)
2136 return r;
2137
086b8853
YW		 2138 r = radv_configure(link);
2139 if (r < 0)
2140 return r;
7465dd22 2141
2ffd6d73
YW		 2142 r = link_lldp_rx_configure(link);
2143 if (r < 0)
2144 return r;
ce43e484 2145
f6fcc1c2 2146 r = link_configure_mtu(link);
40288ece
YW		 2147 if (r < 0)
2148 return r;
44b598a1 2149
9f6e82e6
YW		 2150 r = link_configure_addrgen_mode(link);
2151 if (r < 0)
2152 return r;
0e2fdb83 2153
3a390124
DS		 2154 return link_configure_continue(link);
2155}
2156
2157/* The configuration continues in this separate function, instead of
2158 * including this in the above link_configure() function, for two
2159 * reasons:
2160 * 1) some devices reset the link when the mtu is set, which caused
2161 * an infinite loop here in networkd; see:
2162 * https://github.com/systemd/systemd/issues/6593
2163 * https://github.com/systemd/systemd/issues/9831
2164 * 2) if ipv6ll is disabled, then bringing the interface up must be
2165 * delayed until after we get confirmation from the kernel that
2166 * the addr_gen_mode parameter has been set (via netlink), see:
2167 * https://github.com/systemd/systemd/issues/13882
2168 */
2169static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2170 int r;
2171
2172 assert(link);
2173 assert(link->network);
bd08ce56 2174 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2175
9524014e 2176 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2177 return 0;
2178
4c649652
DS		 2179 /* Drop foreign config, but ignore loopback or critical devices.
2180 * We do not want to remove loopback address or addresses used for root NFS. */
2181 if (!(link->flags & IFF_LOOPBACK) &&
2182 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2183 r = link_drop_foreign_config(link);
2184 if (r < 0)
2185 return r;
2186 }
2187
d236718c
DS		 2188 /* The kernel resets ipv6 mtu after changing device mtu;
2189 * we must set this here, after we've set device mtu */
2190 r = link_set_ipv6_mtu(link);
2191 if (r < 0)
5e0534f1 2192 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2193
3f265037 2194 return link_enter_join_netdev(link);
505f8da7
TG		 2195}
2196
170e88c8
YW		 2197static int link_get_network(Link *link, Network **ret) {
2198 Network *network;
1a3caa49 2199 int r;
170e88c8
YW		 2200
2201 assert(link);
2202 assert(link->manager);
2203 assert(ret);
2204
2205 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
2206 bool warn = false;
2207
1a3caa49 2208 r = net_match_config(
170e88c8
YW		 2209 &network->match,
2210 link->sd_device,
2211 &link->hw_addr.addr.ether,
2212 &link->permanent_mac,
2213 link->driver,
2214 link->iftype,
2215 link->ifname,
2216 link->alternative_names,
2217 link->wlan_iftype,
2218 link->ssid,
1a3caa49
YW		 2219 &link->bssid);
2220 if (r < 0)
2221 return r;
2222 if (r == 0)
170e88c8
YW		 2223 continue;
2224
2225 if (network->match.ifname && link->sd_device) {
2226 uint8_t name_assign_type = NET_NAME_UNKNOWN;
2227 const char *attr;
2228
2229 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
2230 (void) safe_atou8(attr, &name_assign_type);
2231
2232 warn = name_assign_type == NET_NAME_ENUM;
2233 }
2234
2235 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
2236 "found matching network '%s'%s.",
2237 network->filename,
2238 warn ? ", based on potentially unpredictable interface name" : "");
2239
2240 if (network->unmanaged)
2241 return -ENOENT;
2242
2243 *ret = network;
2244 return 0;
2245 }
2246
2247 return -ENOENT;
2248}
2249
0b54c870
YW		 2250static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2251 _cleanup_strv_free_ char **altnames = NULL;
2252 char **n;
2253 int r;
2254
2255 assert(link);
2256 assert(message);
2257
2258 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2259 if (r < 0 && r != -ENODATA)
2260 return r;
2261
2262 STRV_FOREACH(n, link->alternative_names)
2263 hashmap_remove(link->manager->links_by_name, *n);
2264
2265 strv_free_and_replace(link->alternative_names, altnames);
2266
2267 STRV_FOREACH(n, link->alternative_names) {
2268 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2269 if (r < 0)
2270 return r;
2271 }
2272
2273 return 0;
2274}
2275
572b21d9 2276static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2277 Network *network;
2278 int r;
2279
8bceafa7 2280 assert(m);
572b21d9 2281
8bceafa7
YW		 2282 r = sd_netlink_message_get_errno(m);
2283 if (r < 0)
2284 return r;
572b21d9 2285
0b54c870
YW		 2286 r = link_update_alternative_names(link, m);
2287 if (r < 0)
8bceafa7 2288 return r;
572b21d9 2289
170e88c8 2290 r = link_get_network(link, &network);
ad932b15
YW		 2291 if (r == -ENOENT) {
2292 link_enter_unmanaged(link);
2293 return 0;
170e88c8
YW		 2294 }
2295 if (r < 0)
ad932b15
YW		 2296 return r;
2297
99b8517c 2298 if (link->network == network && !force)
ad932b15
YW		 2299 return 0;
2300
2301 log_link_info(link, "Re-configuring with %s", network->filename);
2302
2303 /* Dropping old .network file */
2a99eed0 2304 r = link_stop_engines(link, false);
572b21d9 2305 if (r < 0)
ad932b15 2306 return r;
ad932b15 2307
19d9a5ad
YW		 2308 link_drop_requests(link);
2309
ad932b15
YW		 2310 r = link_drop_config(link);
2311 if (r < 0)
2312 return r;
2313
2c7b826d 2314 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2315 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2316 r = link_drop_foreign_config(link);
2317 if (r < 0)
2318 return r;
2319 }
2320
2321 link_free_carrier_maps(link);
2322 link_free_engines(link);
2323 link->network = network_unref(link->network);
59c31eba 2324 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2325
2326 /* Then, apply new .network file */
9092113d
YW		 2327 link->network = network_ref(network);
2328 link_dirty(link);
ad932b15
YW		 2329
2330 r = link_new_carrier_maps(link);
2331 if (r < 0)
2332 return r;
2333
2334 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2335 link->activated = false;
ad932b15 2336
ad932b15
YW		 2337 r = link_configure(link);
2338 if (r < 0)
2339 return r;
2340
2341 return 0;
2342}
2343
572b21d9
YW		 2344static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2345 int r;
2346
2347 r = link_reconfigure_internal(link, m, false);
2348 if (r < 0)
2349 link_enter_failed(link);
2350
2351 return 1;
2352}
2353
2354static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2355 int r;
2356
2357 r = link_reconfigure_internal(link, m, true);
2358 if (r < 0)
2359 link_enter_failed(link);
2360
2361 return 1;
2362}
2363
2364int link_reconfigure(Link *link, bool force) {
2365 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2366 int r;
2367
8bceafa7 2368 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2369 * the function from being called multiple times simultaneously, refuse to reconfigure the
2370 * interface in these cases. */
8bceafa7 2371 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2372 return 0; /* 0 means no-op. */
2c0d7ed3 2373
572b21d9
YW		 2374 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2375 link->ifindex);
2376 if (r < 0)
2377 return r;
2378
2379 r = netlink_call_async(link->manager->rtnl, NULL, req,
2380 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2381 link_netlink_destroy_callback, link);
2382 if (r < 0)
2383 return r;
2384
2385 link_ref(link);
2386
8bceafa7 2387 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2388}
2389
e6bf7774 2390static int link_initialized_and_synced(Link *link) {
505f8da7 2391 Network *network;
505f8da7
TG		 2392 int r;
2393
2394 assert(link);
2395 assert(link->ifname);
2396 assert(link->manager);
2397
bd08ce56
YW		 2398 /* We may get called either from the asynchronous netlink callback,
2399 * or directly for link_add() if running in a container. See link_add(). */
2400 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2401 return 0;
505f8da7 2402
6a7a4e4d 2403 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2404 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2405
0d4ad91d
AR		 2406 r = link_new_bound_by_list(link);
2407 if (r < 0)
2408 return r;
2409
2410 r = link_handle_bound_by_list(link);
2411 if (r < 0)
2412 return r;
2413
c4a03a56 2414 if (!link->network) {
0894cfe4 2415 r = wifi_get_info(link);
8d968fdd
YW		 2416 if (r < 0)
2417 return r;
2418
170e88c8 2419 r = link_get_network(link, &network);
c4a03a56
TG		 2420 if (r == -ENOENT) {
2421 link_enter_unmanaged(link);
4232cf04 2422 return 0;
170e88c8
YW		 2423 }
2424 if (r < 0)
c4a03a56 2425 return r;
505f8da7 2426
c4a03a56
TG		 2427 if (link->flags & IFF_LOOPBACK) {
2428 if (network->link_local != ADDRESS_FAMILY_NO)
2429 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2430
c4a03a56
TG		 2431 if (network->dhcp != ADDRESS_FAMILY_NO)
2432 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2433
c4a03a56
TG		 2434 if (network->dhcp_server)
2435 log_link_debug(link, "Ignoring DHCP server for loopback link");
2436 }
bd2efe92 2437
9092113d 2438 link->network = network_ref(network);
bcdcc596 2439 link_update_operstate(link, false);
9092113d 2440 link_dirty(link);
c4a03a56 2441 }
505f8da7 2442
0d4ad91d
AR		 2443 r = link_new_bound_to_list(link);
2444 if (r < 0)
2445 return r;
2446
a748b692
TG		 2447 r = link_configure(link);
2448 if (r < 0)
2449 return r;
2450
4232cf04 2451 return 0;
505f8da7
TG		 2452}
2453
302a796f 2454static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2455 int r;
2456
572b21d9
YW		 2457 r = sd_netlink_message_get_errno(m);
2458 if (r < 0) {
40681e5c 2459 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2460 link_enter_failed(link);
2461 return 0;
2462 }
2463
0b54c870
YW		 2464 r = link_update_alternative_names(link, m);
2465 if (r < 0) {
572b21d9 2466 link_enter_failed(link);
0b54c870 2467 return r;
572b21d9
YW		 2468 }
2469
4ff296b0
YW		 2470 r = link_initialized_and_synced(link);
2471 if (r < 0)
2472 link_enter_failed(link);
e6bf7774
YW		 2473 return 1;
2474}
2475
3be9d62a 2476static int link_initialized(Link *link, sd_device *device) {
4afd3348 2477 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2478 int r;
2479
2480 assert(link);
2481 assert(link->manager);
2482 assert(link->manager->rtnl);
2483 assert(device);
2484
8434fd5c 2485 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2486 return 0;
2487
51517f9e 2488 if (link->sd_device)
679b3605
TG		 2489 return 0;
2490
79008bdd 2491 log_link_debug(link, "udev initialized link");
bd08ce56 2492 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2493
51517f9e 2494 link->sd_device = sd_device_ref(device);
4f561e8e 2495
3c9b8860
TG		 2496 /* udev has initialized the link, but we don't know if we have yet
2497 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2498 * when it returns we know that the pending NEWLINKs have already been
2499 * processed and that we are up-to-date */
4f561e8e 2500
3c9b8860
TG		 2501 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2502 link->ifindex);
4f561e8e
TG		 2503 if (r < 0)
2504 return r;
2505
302a796f
YW		 2506 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2507 link_netlink_destroy_callback, link);
4f561e8e
TG		 2508 if (r < 0)
2509 return r;
2510
5da8149f
TG		 2511 link_ref(link);
2512
4f561e8e
TG		 2513 return 0;
2514}
2515
cc2d7efc
YW		 2516static Link *link_drop_or_unref(Link *link) {
2517 if (!link)
2518 return NULL;
2519 if (!link->manager)
2520 return link_unref(link);
2521 return link_drop(link);
2522}
2523
2524DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2525
2526static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2527 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2528 _cleanup_free_ char *ifname = NULL, *kind = NULL;
2529 unsigned short iftype;
2530 int r, ifindex;
2531 uint16_t type;
2532
2533 assert(manager);
2534 assert(message);
2535 assert(ret);
2536
2537 r = sd_netlink_message_get_type(message, &type);
2538 if (r < 0)
2539 return r;
2540 else if (type != RTM_NEWLINK)
2541 return -EINVAL;
2542
2543 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2544 if (r < 0)
2545 return r;
2546 else if (ifindex <= 0)
2547 return -EINVAL;
2548
2549 r = sd_rtnl_message_link_get_type(message, &iftype);
2550 if (r < 0)
2551 return r;
2552
2553 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2554 if (r < 0)
2555 return r;
2556
2557 /* check for link kind */
2558 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2559 if (r >= 0) {
2560 (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2561 r = sd_netlink_message_exit_container(message);
2562 if (r < 0)
2563 return r;
2564 }
2565
2566 link = new(Link, 1);
2567 if (!link)
2568 return -ENOMEM;
2569
2570 *link = (Link) {
2571 .n_ref = 1,
2572 .state = LINK_STATE_PENDING,
bcdcc596 2573 .online_state = _LINK_ONLINE_STATE_INVALID,
cc2d7efc
YW		 2574 .ifindex = ifindex,
2575 .iftype = iftype,
2576 .ifname = TAKE_PTR(ifname),
2577 .kind = TAKE_PTR(kind),
2578
2579 .n_dns = UINT_MAX,
2580 .dns_default_route = -1,
2581 .llmnr = _RESOLVE_SUPPORT_INVALID,
2582 .mdns = _RESOLVE_SUPPORT_INVALID,
2583 .dnssec_mode = _DNSSEC_MODE_INVALID,
2584 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2585 };
2586
2587 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
2588 if (r < 0)
2589 return r;
2590
2591 link->manager = manager;
2592
2593 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex);
2594 if (r < 0)
2595 log_link_debug_errno(link, r, "New device has no master, continuing without");
2596
2597 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
2598 if (r < 0)
2599 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
2600
2601 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2602 if (r < 0)
2603 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
2604
2605 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2606 if (r < 0)
2607 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2608
2609 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2610 if (r < 0)
2611 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2612
cc2d7efc
YW		 2613 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
2614 return -ENOMEM;
2615
2616 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
2617 return -ENOMEM;
2618
2619 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
2620 return -ENOMEM;
2621
0b54c870
YW		 2622 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2623 if (r < 0)
2624 return r;
2625
2626 r = link_update_alternative_names(link, message);
2627 if (r < 0)
2628 return r;
2629
cc2d7efc
YW		 2630 r = link_update_flags(link, message, false);
2631 if (r < 0)
2632 return r;
2633
2634 *ret = TAKE_PTR(link);
2635
2636 return 0;
2637}
2638
3be9d62a 2639static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2640 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2641 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2642 Link *link;
5a937ea2 2643 int r;
505f8da7
TG		 2644
2645 assert(m);
fbbeb65a 2646 assert(m->rtnl);
505f8da7
TG		 2647 assert(message);
2648 assert(ret);
2649
2650 r = link_new(m, message, ret);
2651 if (r < 0)
2652 return r;
2653
2654 link = *ret;
2655
6a7a4e4d 2656 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2657
bf331d87
YW		 2658 if (path_is_read_only_fs("/sys") <= 0) {
2659 /* udev should be around */
ae06ab10 2660 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2661 r = sd_device_new_from_device_id(&device, ifindex_str);
2662 if (r < 0) {
83e7c37b 2663 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2664 return 0;
5c416fc4 2665 }
505f8da7 2666
5a937ea2 2667 r = sd_device_get_is_initialized(device);
51517f9e 2668 if (r < 0) {
bf331d87 2669 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2670 goto failed;
2671 }
5a937ea2 2672 if (r == 0) {
505f8da7 2673 /* not yet ready */
79008bdd 2674 log_link_debug(link, "link pending udev initialization...");
505f8da7 2675 return 0;
3c4cb064 2676 }
505f8da7 2677
299ad32d
YW		 2678 r = device_is_renaming(device);
2679 if (r < 0) {
bf331d87 2680 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2681 goto failed;
2682 }
2683 if (r > 0) {
bf331d87 2684 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2685 return 0;
2686 }
2687
4f561e8e
TG		 2688 r = link_initialized(link, device);
2689 if (r < 0)
5c416fc4 2690 goto failed;
4f561e8e 2691 } else {
e6bf7774 2692 r = link_initialized_and_synced(link);
4f561e8e 2693 if (r < 0)
5c416fc4 2694 goto failed;
4f561e8e 2695 }
505f8da7 2696
a748b692 2697 return 0;
5c416fc4
TG		 2698failed:
2699 link_enter_failed(link);
2700 return r;
a748b692
TG		 2701}
2702
c601ebf7 2703int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2704 int r;
2705
2706 assert(link);
2707
2708 log_link_info(link, "Gained IPv6LL");
2709
c601ebf7 2710 link->ipv6ll_address = *address;
e7ab854c
TG		 2711 link_check_ready(link);
2712
b9ea3d2e 2713 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2714 r = link_acquire_dynamic_ipv6_conf(link);
e7ab854c
TG		 2715 if (r < 0) {
2716 link_enter_failed(link);
2717 return r;
2718 }
2719 }
2720
2721 return 0;
2722}
2723
3be9d62a
YW		 2724int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2725 sd_device_action_t action;
2726 Manager *m = userdata;
2727 Link *link = NULL;
2728 int r, ifindex;
2729
2730 assert(m);
2731 assert(device);
2732
2733 r = sd_device_get_action(device, &action);
2734 if (r < 0) {
2735 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2736 return 0;
2737 }
2738
2739 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2740 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2741 * still exists — and we are interested in that. */
2742 if (action == SD_DEVICE_REMOVE)
2743 return 0;
2744
2745 r = sd_device_get_ifindex(device, &ifindex);
2746 if (r < 0) {
2747 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2748 device_action_to_string(action));
2749 return 0;
2750 }
2751
2752 r = device_is_renaming(device);
2753 if (r < 0) {
2754 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2755 device_action_to_string(action));
2756 return 0;
2757 }
2758 if (r > 0) {
2759 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2760 return 0;
2761 }
2762
2763 r = link_get(m, ifindex, &link);
2764 if (r < 0) {
2765 if (r != -ENODEV)
2766 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2767 return 0;
2768 }
2769
2770 (void) link_initialized(link, device);
2771
2772 return 0;
2773}
2774
9c0a72f9
TG		 2775static int link_carrier_gained(Link *link) {
2776 int r;
2777
2778 assert(link);
2779
600b7898
YW		 2780 if (link->iftype == ARPHRD_CAN)
2781 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2782 return link_handle_bound_by_list(link);
2783
0894cfe4 2784 r = wifi_get_info(link);
8d968fdd
YW		 2785 if (r < 0)
2786 return r;
2787 if (r > 0) {
8bceafa7 2788 r = link_reconfigure(link, false);
572b21d9
YW		 2789 if (r < 0) {
2790 link_enter_failed(link);
8d968fdd 2791 return r;
572b21d9 2792 }
8d968fdd
YW		 2793 }
2794
b9ea3d2e 2795 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2796 r = link_acquire_dynamic_conf(link);
9c0a72f9
TG		 2797 if (r < 0) {
2798 link_enter_failed(link);
2799 return r;
2800 }
6fc25497 2801
97108953 2802 r = link_request_static_configs(link);
6fc25497
SS		 2803 if (r < 0)
2804 return r;
9c0a72f9
TG		 2805 }
2806
9a038aac 2807 return link_handle_bound_by_list(link);
9c0a72f9
TG		 2808}
2809
2810static int link_carrier_lost(Link *link) {
2811 int r;
2812
2813 assert(link);
2814
25e992ba 2815 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2816 return 0;
2817
600b7898
YW		 2818 if (link->iftype == ARPHRD_CAN)
2819 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2820 return link_handle_bound_by_list(link);
2821
fbdb6605 2822 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2823 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2824 * configuration and stop the clients as well. */
97e7fb39
SS		 2825 if (link->setting_mtu)
2826 return 0;
2827
2a99eed0 2828 r = link_stop_engines(link, false);
9c0a72f9
TG		 2829 if (r < 0) {
2830 link_enter_failed(link);
2831 return r;
2832 }
2833
19d9a5ad
YW		 2834 link_drop_requests(link);
2835
3104883d
SS		 2836 r = link_drop_config(link);
2837 if (r < 0)
2838 return r;
2839
2c7b826d 2840 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2841 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2842 r = link_drop_foreign_config(link);
2843 if (r < 0)
2844 return r;
2845 }
3104883d 2846
0d4ad91d
AR		 2847 r = link_handle_bound_by_list(link);
2848 if (r < 0)
2849 return r;
2850
9c0a72f9
TG		 2851 return 0;
2852}
2853
2854int link_carrier_reset(Link *link) {
2855 int r;
2856
2857 assert(link);
2858
2859 if (link_has_carrier(link)) {
2860 r = link_carrier_lost(link);
2861 if (r < 0)
2862 return r;
2863
2864 r = link_carrier_gained(link);
2865 if (r < 0)
2866 return r;
2867
6a7a4e4d 2868 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2869 }
2870
2871 return 0;
2872}
2873
d236718c
DS		 2874static int link_admin_state_up(Link *link) {
2875 int r;
2876
61135582
DS		 2877 assert(link);
2878
3be9d62a
YW		 2879 /* This is called every time an interface admin state changes to up;
2880 * specifically, when IFF_UP flag changes from unset to set. */
2881
61135582
DS		 2882 if (!link->network)
2883 return 0;
2884
2885 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2886 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2887 return link_down(link, NULL);
2888 }
2889
d236718c
DS		 2890 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2891 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2892 * ipv6_mtu_set prevents this from trying to set it too early before
2893 * the link->network has been setup; we only need to reset it
2894 * here if we've already set it during normal initialization. */
2895 if (link->ipv6_mtu_set) {
2896 r = link_set_ipv6_mtu(link);
2897 if (r < 0)
2898 return r;
2899 }
2900
2901 return 0;
2902}
2903
61135582 2904static int link_admin_state_down(Link *link) {
61135582
DS		 2905 assert(link);
2906
2907 if (!link->network)
2908 return 0;
2909
2910 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2911 if (streq_ptr(link->kind, "can") && !link->can_configured)
2912 /* CAN device needs to be down on configure. */
2913 return 0;
2914
61135582
DS		 2915 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2916 return link_up(link);
2917 }
2918
2919 return 0;
2920}
2921
3be9d62a 2922static int link_update(Link *link, sd_netlink_message *m) {
b8162cd2 2923 hw_addr_data hw_addr;
ca4e095a 2924 const char *ifname;
afe7fd56 2925 uint32_t mtu;
d236718c 2926 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2927 int old_master, r;
22936833 2928
dd3efc09 2929 assert(link);
b8941f74 2930 assert(link->ifname);
22936833
TG		 2931 assert(m);
2932
7619683b 2933 if (link->state == LINK_STATE_LINGER) {
5238e957 2934 log_link_info(link, "Link re-added");
289e6774 2935 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2936
2937 r = link_new_carrier_maps(link);
2938 if (r < 0)
2939 return r;
7619683b
TG		 2940 }
2941
1c4baffc 2942 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2943 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2944 Manager *manager = link->manager;
b8941f74 2945
30de2b89 2946 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2947
30de2b89
YW		 2948 link_drop(link);
2949 r = link_add(manager, m, &link);
2950 if (r < 0)
2951 return r;
0b54c870
YW		 2952 } else {
2953 r = link_update_alternative_names(link, m);
2954 if (r < 0)
2955 return r;
b8941f74
TG		 2956 }
2957
1c4baffc 2958 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2959 if (r >= 0 && mtu > 0) {
2960 link->mtu = mtu;
4e964aa0 2961 if (link->original_mtu == 0) {
afe7fd56 2962 link->original_mtu = mtu;
6a7a4e4d 2963 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2964 }
2965
2966 if (link->dhcp_client) {
3c9b8860
TG		 2967 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2968 link->mtu);
fc95c359
YW		 2969 if (r < 0)
2970 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2971 }
7465dd22
PF		 2972
2973 if (link->radv) {
2974 r = sd_radv_set_mtu(link->radv, link->mtu);
2975 if (r < 0)
2976 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2977 }
9842de0d 2978 }
69629de9 2979
e9189a1f
TG		 2980 /* The kernel may broadcast NEWLINK messages without the MAC address
2981 set, simply ignore them. */
b8162cd2
TR		 2982 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2983 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2984 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2985
b8162cd2 2986 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2987
b8162cd2 2988 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2989
a3adb4a6
YW		 2990 r = ipv4ll_update_mac(link);
2991 if (r < 0)
2992 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2993
d947f7f9
YW		 2994 r = dhcp4_update_mac(link);
2995 if (r < 0)
2996 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2997
eebba6dc
YW		 2998 r = dhcp6_update_mac(link);
2999 if (r < 0)
3000 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 3001
d0c4275c 3002 r = radv_update_mac(link);
be9363cc
YW		 3003 if (r < 0)
3004 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 3005
3006 if (link->ndisc) {
b8162cd2 3007 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 3008 if (r < 0)
3009 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3010 }
d93d655c 3011
dfc58b47
YW		 3012 if (link->lldp) {
3013 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
3014 if (r < 0)
3015 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
3016 }
3017
d93d655c
YW		 3018 r = ipv4_dad_update_mac(link);
3019 if (r < 0)
3020 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 3021 }
3022
bb262ef0
YW		 3023 old_master = link->master_ifindex;
3024 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3025
d236718c 3026 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3027 had_carrier = link_has_carrier(link);
3028
bb262ef0 3029 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3030 if (r < 0)
3031 return r;
3032
d236718c
DS		 3033 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3034 log_link_info(link, "Link UP");
3035
3036 r = link_admin_state_up(link);
3037 if (r < 0)
3038 return r;
61135582 3039 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 3040 log_link_info(link, "Link DOWN");
3041
61135582
DS		 3042 r = link_admin_state_down(link);
3043 if (r < 0)
3044 return r;
3045 }
3046
273eec24
LP		 3047 r = link_update_lldp(link);
3048 if (r < 0)
3049 return r;
3050
a61bb41c
TG		 3051 carrier_gained = !had_carrier && link_has_carrier(link);
3052 carrier_lost = had_carrier && !link_has_carrier(link);
3053
3054 if (carrier_gained) {
6a7a4e4d 3055 log_link_info(link, "Gained carrier");
a61bb41c 3056
9c0a72f9
TG		 3057 r = link_carrier_gained(link);
3058 if (r < 0)
3059 return r;
a61bb41c 3060 } else if (carrier_lost) {
6a7a4e4d 3061 log_link_info(link, "Lost carrier");
a61bb41c 3062
9c0a72f9
TG		 3063 r = link_carrier_lost(link);
3064 if (r < 0)
a61bb41c 3065 return r;
a61bb41c
TG		 3066 }
3067
3068 return 0;
dd3efc09 3069}
fe8db0c5 3070
3be9d62a
YW		 3071int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
3072 Link *link = NULL;
3073 NetDev *netdev = NULL;
3074 uint16_t type;
3075 const char *name;
3076 int r, ifindex;
3077
3078 assert(rtnl);
3079 assert(message);
3080 assert(m);
3081
3082 if (sd_netlink_message_is_error(message)) {
3083 r = sd_netlink_message_get_errno(message);
3084 if (r < 0)
3085 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
3086
3087 return 0;
3088 }
3089
3090 r = sd_netlink_message_get_type(message, &type);
3091 if (r < 0) {
3092 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
3093 return 0;
3094 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
3095 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
3096 return 0;
3097 }
3098
3099 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
3100 if (r < 0) {
3101 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
3102 return 0;
3103 } else if (ifindex <= 0) {
3104 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
3105 return 0;
3106 }
3107
3108 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
3109 if (r < 0) {
3110 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
3111 return 0;
3112 }
3113
3114 (void) link_get(m, ifindex, &link);
3115 (void) netdev_get(m, name, &netdev);
3116
3117 switch (type) {
3118 case RTM_NEWLINK:
3119 if (!link) {
3120 /* link is new, so add it */
3121 r = link_add(m, message, &link);
3122 if (r < 0) {
3123 log_warning_errno(r, "Could not process new link message, ignoring: %m");
3124 return 0;
3125 }
3126 }
3127
3128 if (netdev) {
3129 /* netdev exists, so make sure the ifindex matches */
3130 r = netdev_set_ifindex(netdev, message);
3131 if (r < 0) {
3132 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
3133 return 0;
3134 }
3135 }
3136
3137 r = link_update(link, message);
3138 if (r < 0) {
3139 log_warning_errno(r, "Could not process link message, ignoring: %m");
3140 return 0;
3141 }
3142
3143 break;
3144
3145 case RTM_DELLINK:
3146 link_drop(link);
3147 netdev_drop(netdev);
3148
3149 break;
3150
3151 default:
3152 assert_not_reached("Received link message with invalid RTNL message type.");
3153 }
3154
3155 return 1;
3156}
3157
fe8db0c5 3158static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3159 [LINK_STATE_PENDING] = "pending",
bd08ce56 3160 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3161 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3162 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3163 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3164 [LINK_STATE_FAILED] = "failed",
370e9930 3165 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3166};
3167
3168DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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