]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/network/networkd-link.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
network: introduce request_hash_ops to dedup requests
[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
682c65b0 828static int link_set_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
e7ab854c
TG		 1163static int link_acquire_ipv6_conf(Link *link) {
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
6fc25497 1198static int link_acquire_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
1227static int link_acquire_conf(Link *link) {
1228 int r;
1229
1230 assert(link);
1231
1232 r = link_acquire_ipv4_conf(link);
1233 if (r < 0)
1234 return r;
1235
94876904 1236 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1237 r = link_acquire_ipv6_conf(link);
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
9ed794a3 1832 if (link->network->bridge) {
e1853b00 1833 r = link_set_bridge(link);
6a7a4e4d
LP		 1834 if (r < 0)
1835 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1836
1837 r = link_append_to_master(link, link->network->bridge);
1838 if (r < 0)
1839 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1840 }
1841
eb64b435 1842 if (link->network->bond) {
7fcee284 1843 r = link_set_bond(link);
eb64b435
SS		 1844 if (r < 0)
1845 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1846
45e11abf 1847 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1848 if (r < 0)
1849 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1850 }
1851
34d7f2c9
YW		 1852 r = link_set_bridge_vlan(link);
1853 if (r < 0)
1854 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1855
c1835a42
RM		 1856 /* Skip setting up addresses until it gets carrier,
1857 or it would try to set addresses twice,
1858 which is bad for non-idempotent steps. */
dad2d78e 1859 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1860 return 0;
1861
b425c3ae 1862 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1863
1864 r = link_acquire_conf(link);
1865 if (r < 0)
1866 return r;
1867
682c65b0 1868 return link_set_static_configs(link);
02b59d57
TG		 1869}
1870
302a796f 1871static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1872 int r;
1873
1746cf2a 1874 assert(link);
ef1ba606 1875 assert(link->network);
34bf3c00 1876 assert(link->enslaving > 0);
02b59d57 1877
313cefa1 1878 link->enslaving--;
52433f6b 1879
5da8149f 1880 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1881 return 1;
1882
1c4baffc 1883 r = sd_netlink_message_get_errno(m);
856f962c 1884 if (r < 0 && r != -EEXIST) {
5ecb131d 1885 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1886 link_enter_failed(link);
1887 return 1;
4ff296b0
YW		 1888 }
1889
1890 log_link_debug(link, "Joined netdev");
02b59d57 1891
34bf3c00 1892 if (link->enslaving == 0) {
4ff296b0
YW		 1893 r = link_joined(link);
1894 if (r < 0)
1895 link_enter_failed(link);
34bf3c00 1896 }
02b59d57
TG		 1897
1898 return 1;
1899}
1900
3f265037 1901static int link_enter_join_netdev(Link *link) {
6a0a2f86 1902 NetDev *netdev;
02b59d57
TG		 1903 int r;
1904
1905 assert(link);
1906 assert(link->network);
bd08ce56 1907 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1908
289e6774 1909 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1910
34bf3c00 1911 link->enslaving = 0;
02b59d57 1912
d9c67ea1 1913 if (link->network->bond) {
cbff7170
TJ		 1914 if (link->network->bond->state == NETDEV_STATE_READY &&
1915 link->network->bond->ifindex == link->master_ifindex)
1916 return link_joined(link);
1917
f2341e0a
LP		 1918 log_struct(LOG_DEBUG,
1919 LOG_LINK_INTERFACE(link),
1920 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1921 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1922
34bf3c00
YW		 1923 link->enslaving++;
1924
f2341e0a 1925 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1926 if (r < 0) {
f2341e0a
LP		 1927 log_struct_errno(LOG_WARNING, r,
1928 LOG_LINK_INTERFACE(link),
1929 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1930 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1931 link_enter_failed(link);
1932 return r;
c0267a59
AW		 1933 }
1934 }
1935
1936 if (link->network->batadv) {
1937 log_struct(LOG_DEBUG,
1938 LOG_LINK_INTERFACE(link),
1939 LOG_NETDEV_INTERFACE(link->network->batadv),
1940 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1941
1942 link->enslaving++;
1943
1944 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1945 if (r < 0) {
1946 log_struct_errno(LOG_WARNING, r,
1947 LOG_LINK_INTERFACE(link),
1948 LOG_NETDEV_INTERFACE(link->network->batadv),
1949 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1950 link_enter_failed(link);
1951 return r;
52433f6b 1952 }
0ad6148e
MO		 1953 }
1954
d9c67ea1 1955 if (link->network->bridge) {
f2341e0a
LP		 1956 log_struct(LOG_DEBUG,
1957 LOG_LINK_INTERFACE(link),
1958 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1959 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1960
34bf3c00
YW		 1961 link->enslaving++;
1962
f2341e0a 1963 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1964 if (r < 0) {
f2341e0a
LP		 1965 log_struct_errno(LOG_WARNING, r,
1966 LOG_LINK_INTERFACE(link),
1967 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1968 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1969 link_enter_failed(link);
1970 return r;
1971 }
52433f6b
TG		 1972 }
1973
6cb955c6
AR		 1974 if (link->network->vrf) {
1975 log_struct(LOG_DEBUG,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1978 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1979
34bf3c00
YW		 1980 link->enslaving++;
1981
6cb955c6
AR		 1982 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1983 if (r < 0) {
1984 log_struct_errno(LOG_WARNING, r,
1985 LOG_LINK_INTERFACE(link),
1986 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1987 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1988 link_enter_failed(link);
1989 return r;
1990 }
6cb955c6
AR		 1991 }
1992
90e74a66 1993 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1994
2b6db913
YW		 1995 if (netdev->ifindex > 0)
1996 /* Assume already enslaved. */
a63e5daa 1997 continue;
a63e5daa 1998
7033af49
YW		 1999 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2000 continue;
2001
f2341e0a
LP		 2002 log_struct(LOG_DEBUG,
2003 LOG_LINK_INTERFACE(link),
2004 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2005 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2006
34bf3c00
YW		 2007 link->enslaving++;
2008
f2341e0a 2009 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2010 if (r < 0) {
f2341e0a
LP		 2011 log_struct_errno(LOG_WARNING, r,
2012 LOG_LINK_INTERFACE(link),
2013 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2014 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2015 link_enter_failed(link);
2016 return r;
2017 }
326cb406
SS		 2018 }
2019
34bf3c00
YW		 2020 if (link->enslaving == 0)
2021 return link_joined(link);
2022
ef1ba606
TG		 2023 return 0;
2024}
2025
5e5b137a 2026static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2027 int k, r;
2028
2029 assert(link);
2030 assert(link->manager);
5e5b137a 2031
e36d601c 2032 r = link_drop_foreign_routes(link);
5e5b137a 2033
e36d601c 2034 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2035 if (k < 0 && r >= 0)
2036 r = k;
2037
e36d601c 2038 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2039 if (k < 0 && r >= 0)
2040 r = k;
d1bdafd2 2041
e36d601c 2042 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2043 if (k < 0 && r >= 0)
2044 r = k;
2045
0b81225e
YW		 2046 k = manager_drop_foreign_routing_policy_rules(link->manager);
2047 if (k < 0 && r >= 0)
2048 r = k;
2049
2050 return r;
5e5b137a
TG		 2051}
2052
3104883d 2053static int link_drop_config(Link *link) {
0b81225e
YW		 2054 int k, r;
2055
2056 assert(link);
2057 assert(link->manager);
3104883d 2058
e36d601c 2059 r = link_drop_routes(link);
3104883d 2060
e36d601c 2061 k = link_drop_nexthops(link);
0b81225e
YW		 2062 if (k < 0 && r >= 0)
2063 r = k;
d1bdafd2 2064
e36d601c 2065 k = link_drop_addresses(link);
0b81225e
YW		 2066 if (k < 0 && r >= 0)
2067 r = k;
2068
e36d601c 2069 k = link_drop_neighbors(link);
25b82b6e
YW		 2070 if (k < 0 && r >= 0)
2071 r = k;
2072
0b81225e
YW		 2073 k = manager_drop_routing_policy_rules(link->manager, link);
2074 if (k < 0 && r >= 0)
2075 r = k;
3104883d 2076
c69305ff
LP		 2077 ndisc_flush(link);
2078
0b81225e 2079 return r;
3104883d
SS		 2080}
2081
c3b94251 2082static int link_configure(Link *link) {
4ecdcb07
YW		 2083 int r;
2084
ef1ba606 2085 assert(link);
b22d8a00 2086 assert(link->network);
bd08ce56 2087 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2088
34658df2 2089 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2090 if (r < 0)
2091 return r;
2092
518cd6b5
SS		 2093 r = link_configure_sr_iov(link);
2094 if (r < 0)
2095 return r;
2096
500b96eb 2097 if (link->iftype == ARPHRD_CAN)
600b7898 2098 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2099 return link_configure_can(link);
92c918b0 2100
5e0534f1 2101 r = link_set_sysctl(link);
b69c3180
SS		 2102 if (r < 0)
2103 return r;
8749cbcd 2104
e16e4b3b
DS		 2105 r = link_set_mac(link);
2106 if (r < 0)
2107 return r;
2108
2109 r = link_set_nomaster(link);
2110 if (r < 0)
2111 return r;
2112
99d2baa2
SS		 2113 r = link_set_flags(link);
2114 if (r < 0)
2115 return r;
2116
89fe6535
SS		 2117 r = link_set_group(link);
2118 if (r < 0)
2119 return r;
2120
2ffd6d73
YW		 2121 r = ipv4ll_configure(link);
2122 if (r < 0)
2123 return r;
64b21ece 2124
2ffd6d73
YW		 2125 r = dhcp4_configure(link);
2126 if (r < 0)
2127 return r;
eb34d4af 2128
2ffd6d73
YW		 2129 r = dhcp6_configure(link);
2130 if (r < 0)
2131 return r;
f5a8c43f 2132
2ffd6d73
YW		 2133 r = ndisc_configure(link);
2134 if (r < 0)
2135 return r;
4138fb2c 2136
1d28a3cf
YW		 2137 r = link_request_dhcp_server(link);
2138 if (r < 0)
2139 return r;
2140
086b8853
YW		 2141 r = radv_configure(link);
2142 if (r < 0)
2143 return r;
7465dd22 2144
2ffd6d73
YW		 2145 r = link_lldp_rx_configure(link);
2146 if (r < 0)
2147 return r;
ce43e484 2148
f6fcc1c2 2149 r = link_configure_mtu(link);
40288ece
YW		 2150 if (r < 0)
2151 return r;
44b598a1 2152
9f6e82e6
YW		 2153 r = link_configure_addrgen_mode(link);
2154 if (r < 0)
2155 return r;
0e2fdb83 2156
3a390124
DS		 2157 return link_configure_continue(link);
2158}
2159
2160/* The configuration continues in this separate function, instead of
2161 * including this in the above link_configure() function, for two
2162 * reasons:
2163 * 1) some devices reset the link when the mtu is set, which caused
2164 * an infinite loop here in networkd; see:
2165 * https://github.com/systemd/systemd/issues/6593
2166 * https://github.com/systemd/systemd/issues/9831
2167 * 2) if ipv6ll is disabled, then bringing the interface up must be
2168 * delayed until after we get confirmation from the kernel that
2169 * the addr_gen_mode parameter has been set (via netlink), see:
2170 * https://github.com/systemd/systemd/issues/13882
2171 */
2172static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2173 int r;
2174
2175 assert(link);
2176 assert(link->network);
bd08ce56 2177 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2178
9524014e 2179 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2180 return 0;
2181
4c649652
DS		 2182 /* Drop foreign config, but ignore loopback or critical devices.
2183 * We do not want to remove loopback address or addresses used for root NFS. */
2184 if (!(link->flags & IFF_LOOPBACK) &&
2185 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2186 r = link_drop_foreign_config(link);
2187 if (r < 0)
2188 return r;
2189 }
2190
d236718c
DS		 2191 /* The kernel resets ipv6 mtu after changing device mtu;
2192 * we must set this here, after we've set device mtu */
2193 r = link_set_ipv6_mtu(link);
2194 if (r < 0)
5e0534f1 2195 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2196
3f265037 2197 return link_enter_join_netdev(link);
505f8da7
TG		 2198}
2199
170e88c8
YW		 2200static int link_get_network(Link *link, Network **ret) {
2201 Network *network;
1a3caa49 2202 int r;
170e88c8
YW		 2203
2204 assert(link);
2205 assert(link->manager);
2206 assert(ret);
2207
2208 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
2209 bool warn = false;
2210
1a3caa49 2211 r = net_match_config(
170e88c8
YW		 2212 &network->match,
2213 link->sd_device,
2214 &link->hw_addr.addr.ether,
2215 &link->permanent_mac,
2216 link->driver,
2217 link->iftype,
2218 link->ifname,
2219 link->alternative_names,
2220 link->wlan_iftype,
2221 link->ssid,
1a3caa49
YW		 2222 &link->bssid);
2223 if (r < 0)
2224 return r;
2225 if (r == 0)
170e88c8
YW		 2226 continue;
2227
2228 if (network->match.ifname && link->sd_device) {
2229 uint8_t name_assign_type = NET_NAME_UNKNOWN;
2230 const char *attr;
2231
2232 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
2233 (void) safe_atou8(attr, &name_assign_type);
2234
2235 warn = name_assign_type == NET_NAME_ENUM;
2236 }
2237
2238 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
2239 "found matching network '%s'%s.",
2240 network->filename,
2241 warn ? ", based on potentially unpredictable interface name" : "");
2242
2243 if (network->unmanaged)
2244 return -ENOENT;
2245
2246 *ret = network;
2247 return 0;
2248 }
2249
2250 return -ENOENT;
2251}
2252
0b54c870
YW		 2253static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2254 _cleanup_strv_free_ char **altnames = NULL;
2255 char **n;
2256 int r;
2257
2258 assert(link);
2259 assert(message);
2260
2261 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2262 if (r < 0 && r != -ENODATA)
2263 return r;
2264
2265 STRV_FOREACH(n, link->alternative_names)
2266 hashmap_remove(link->manager->links_by_name, *n);
2267
2268 strv_free_and_replace(link->alternative_names, altnames);
2269
2270 STRV_FOREACH(n, link->alternative_names) {
2271 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2272 if (r < 0)
2273 return r;
2274 }
2275
2276 return 0;
2277}
2278
572b21d9 2279static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2280 Network *network;
2281 int r;
2282
8bceafa7 2283 assert(m);
572b21d9 2284
8bceafa7
YW		 2285 r = sd_netlink_message_get_errno(m);
2286 if (r < 0)
2287 return r;
572b21d9 2288
0b54c870
YW		 2289 r = link_update_alternative_names(link, m);
2290 if (r < 0)
8bceafa7 2291 return r;
572b21d9 2292
170e88c8 2293 r = link_get_network(link, &network);
ad932b15
YW		 2294 if (r == -ENOENT) {
2295 link_enter_unmanaged(link);
2296 return 0;
170e88c8
YW		 2297 }
2298 if (r < 0)
ad932b15
YW		 2299 return r;
2300
99b8517c 2301 if (link->network == network && !force)
ad932b15
YW		 2302 return 0;
2303
2304 log_link_info(link, "Re-configuring with %s", network->filename);
2305
2306 /* Dropping old .network file */
2a99eed0 2307 r = link_stop_engines(link, false);
572b21d9 2308 if (r < 0)
ad932b15 2309 return r;
ad932b15 2310
19d9a5ad
YW		 2311 link_drop_requests(link);
2312
ad932b15
YW		 2313 r = link_drop_config(link);
2314 if (r < 0)
2315 return r;
2316
2c7b826d 2317 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2318 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2319 r = link_drop_foreign_config(link);
2320 if (r < 0)
2321 return r;
2322 }
2323
2324 link_free_carrier_maps(link);
2325 link_free_engines(link);
2326 link->network = network_unref(link->network);
59c31eba 2327 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2328
2329 /* Then, apply new .network file */
9092113d
YW		 2330 link->network = network_ref(network);
2331 link_dirty(link);
ad932b15
YW		 2332
2333 r = link_new_carrier_maps(link);
2334 if (r < 0)
2335 return r;
2336
2337 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2338 link->activated = false;
ad932b15 2339
ad932b15
YW		 2340 r = link_configure(link);
2341 if (r < 0)
2342 return r;
2343
2344 return 0;
2345}
2346
572b21d9
YW		 2347static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2348 int r;
2349
2350 r = link_reconfigure_internal(link, m, false);
2351 if (r < 0)
2352 link_enter_failed(link);
2353
2354 return 1;
2355}
2356
2357static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2358 int r;
2359
2360 r = link_reconfigure_internal(link, m, true);
2361 if (r < 0)
2362 link_enter_failed(link);
2363
2364 return 1;
2365}
2366
2367int link_reconfigure(Link *link, bool force) {
2368 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2369 int r;
2370
8bceafa7 2371 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2372 * the function from being called multiple times simultaneously, refuse to reconfigure the
2373 * interface in these cases. */
8bceafa7 2374 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2375 return 0; /* 0 means no-op. */
2c0d7ed3 2376
572b21d9
YW		 2377 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2378 link->ifindex);
2379 if (r < 0)
2380 return r;
2381
2382 r = netlink_call_async(link->manager->rtnl, NULL, req,
2383 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2384 link_netlink_destroy_callback, link);
2385 if (r < 0)
2386 return r;
2387
2388 link_ref(link);
2389
8bceafa7 2390 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2391}
2392
e6bf7774 2393static int link_initialized_and_synced(Link *link) {
505f8da7 2394 Network *network;
505f8da7
TG		 2395 int r;
2396
2397 assert(link);
2398 assert(link->ifname);
2399 assert(link->manager);
2400
bd08ce56
YW		 2401 /* We may get called either from the asynchronous netlink callback,
2402 * or directly for link_add() if running in a container. See link_add(). */
2403 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2404 return 0;
505f8da7 2405
6a7a4e4d 2406 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2407 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2408
0d4ad91d
AR		 2409 r = link_new_bound_by_list(link);
2410 if (r < 0)
2411 return r;
2412
2413 r = link_handle_bound_by_list(link);
2414 if (r < 0)
2415 return r;
2416
c4a03a56 2417 if (!link->network) {
0894cfe4 2418 r = wifi_get_info(link);
8d968fdd
YW		 2419 if (r < 0)
2420 return r;
2421
170e88c8 2422 r = link_get_network(link, &network);
c4a03a56
TG		 2423 if (r == -ENOENT) {
2424 link_enter_unmanaged(link);
4232cf04 2425 return 0;
170e88c8
YW		 2426 }
2427 if (r < 0)
c4a03a56 2428 return r;
505f8da7 2429
c4a03a56
TG		 2430 if (link->flags & IFF_LOOPBACK) {
2431 if (network->link_local != ADDRESS_FAMILY_NO)
2432 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2433
c4a03a56
TG		 2434 if (network->dhcp != ADDRESS_FAMILY_NO)
2435 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2436
c4a03a56
TG		 2437 if (network->dhcp_server)
2438 log_link_debug(link, "Ignoring DHCP server for loopback link");
2439 }
bd2efe92 2440
9092113d 2441 link->network = network_ref(network);
bcdcc596 2442 link_update_operstate(link, false);
9092113d 2443 link_dirty(link);
c4a03a56 2444 }
505f8da7 2445
0d4ad91d
AR		 2446 r = link_new_bound_to_list(link);
2447 if (r < 0)
2448 return r;
2449
a748b692
TG		 2450 r = link_configure(link);
2451 if (r < 0)
2452 return r;
2453
4232cf04 2454 return 0;
505f8da7
TG		 2455}
2456
302a796f 2457static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2458 int r;
2459
572b21d9
YW		 2460 r = sd_netlink_message_get_errno(m);
2461 if (r < 0) {
40681e5c 2462 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2463 link_enter_failed(link);
2464 return 0;
2465 }
2466
0b54c870
YW		 2467 r = link_update_alternative_names(link, m);
2468 if (r < 0) {
572b21d9 2469 link_enter_failed(link);
0b54c870 2470 return r;
572b21d9
YW		 2471 }
2472
4ff296b0
YW		 2473 r = link_initialized_and_synced(link);
2474 if (r < 0)
2475 link_enter_failed(link);
e6bf7774
YW		 2476 return 1;
2477}
2478
3be9d62a 2479static int link_initialized(Link *link, sd_device *device) {
4afd3348 2480 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2481 int r;
2482
2483 assert(link);
2484 assert(link->manager);
2485 assert(link->manager->rtnl);
2486 assert(device);
2487
8434fd5c 2488 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2489 return 0;
2490
51517f9e 2491 if (link->sd_device)
679b3605
TG		 2492 return 0;
2493
79008bdd 2494 log_link_debug(link, "udev initialized link");
bd08ce56 2495 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2496
51517f9e 2497 link->sd_device = sd_device_ref(device);
4f561e8e 2498
3c9b8860
TG		 2499 /* udev has initialized the link, but we don't know if we have yet
2500 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2501 * when it returns we know that the pending NEWLINKs have already been
2502 * processed and that we are up-to-date */
4f561e8e 2503
3c9b8860
TG		 2504 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2505 link->ifindex);
4f561e8e
TG		 2506 if (r < 0)
2507 return r;
2508
302a796f
YW		 2509 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2510 link_netlink_destroy_callback, link);
4f561e8e
TG		 2511 if (r < 0)
2512 return r;
2513
5da8149f
TG		 2514 link_ref(link);
2515
4f561e8e
TG		 2516 return 0;
2517}
2518
cc2d7efc
YW		 2519static Link *link_drop_or_unref(Link *link) {
2520 if (!link)
2521 return NULL;
2522 if (!link->manager)
2523 return link_unref(link);
2524 return link_drop(link);
2525}
2526
2527DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2528
2529static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2530 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2531 _cleanup_free_ char *ifname = NULL, *kind = NULL;
2532 unsigned short iftype;
2533 int r, ifindex;
2534 uint16_t type;
2535
2536 assert(manager);
2537 assert(message);
2538 assert(ret);
2539
2540 r = sd_netlink_message_get_type(message, &type);
2541 if (r < 0)
2542 return r;
2543 else if (type != RTM_NEWLINK)
2544 return -EINVAL;
2545
2546 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2547 if (r < 0)
2548 return r;
2549 else if (ifindex <= 0)
2550 return -EINVAL;
2551
2552 r = sd_rtnl_message_link_get_type(message, &iftype);
2553 if (r < 0)
2554 return r;
2555
2556 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2557 if (r < 0)
2558 return r;
2559
2560 /* check for link kind */
2561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2562 if (r >= 0) {
2563 (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2564 r = sd_netlink_message_exit_container(message);
2565 if (r < 0)
2566 return r;
2567 }
2568
2569 link = new(Link, 1);
2570 if (!link)
2571 return -ENOMEM;
2572
2573 *link = (Link) {
2574 .n_ref = 1,
2575 .state = LINK_STATE_PENDING,
bcdcc596 2576 .online_state = _LINK_ONLINE_STATE_INVALID,
cc2d7efc
YW		 2577 .ifindex = ifindex,
2578 .iftype = iftype,
2579 .ifname = TAKE_PTR(ifname),
2580 .kind = TAKE_PTR(kind),
2581
2582 .n_dns = UINT_MAX,
2583 .dns_default_route = -1,
2584 .llmnr = _RESOLVE_SUPPORT_INVALID,
2585 .mdns = _RESOLVE_SUPPORT_INVALID,
2586 .dnssec_mode = _DNSSEC_MODE_INVALID,
2587 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2588 };
2589
2590 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
2591 if (r < 0)
2592 return r;
2593
2594 link->manager = manager;
2595
2596 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex);
2597 if (r < 0)
2598 log_link_debug_errno(link, r, "New device has no master, continuing without");
2599
2600 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
2601 if (r < 0)
2602 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
2603
2604 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2605 if (r < 0)
2606 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
2607
2608 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2609 if (r < 0)
2610 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2611
2612 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2613 if (r < 0)
2614 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2615
cc2d7efc
YW		 2616 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
2617 return -ENOMEM;
2618
2619 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
2620 return -ENOMEM;
2621
2622 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
2623 return -ENOMEM;
2624
0b54c870
YW		 2625 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2626 if (r < 0)
2627 return r;
2628
2629 r = link_update_alternative_names(link, message);
2630 if (r < 0)
2631 return r;
2632
cc2d7efc
YW		 2633 r = link_update_flags(link, message, false);
2634 if (r < 0)
2635 return r;
2636
2637 *ret = TAKE_PTR(link);
2638
2639 return 0;
2640}
2641
3be9d62a 2642static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2643 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2644 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2645 Link *link;
5a937ea2 2646 int r;
505f8da7
TG		 2647
2648 assert(m);
fbbeb65a 2649 assert(m->rtnl);
505f8da7
TG		 2650 assert(message);
2651 assert(ret);
2652
2653 r = link_new(m, message, ret);
2654 if (r < 0)
2655 return r;
2656
2657 link = *ret;
2658
6a7a4e4d 2659 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2660
bf331d87
YW		 2661 if (path_is_read_only_fs("/sys") <= 0) {
2662 /* udev should be around */
ae06ab10 2663 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2664 r = sd_device_new_from_device_id(&device, ifindex_str);
2665 if (r < 0) {
83e7c37b 2666 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2667 return 0;
5c416fc4 2668 }
505f8da7 2669
5a937ea2 2670 r = sd_device_get_is_initialized(device);
51517f9e 2671 if (r < 0) {
bf331d87 2672 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2673 goto failed;
2674 }
5a937ea2 2675 if (r == 0) {
505f8da7 2676 /* not yet ready */
79008bdd 2677 log_link_debug(link, "link pending udev initialization...");
505f8da7 2678 return 0;
3c4cb064 2679 }
505f8da7 2680
299ad32d
YW		 2681 r = device_is_renaming(device);
2682 if (r < 0) {
bf331d87 2683 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2684 goto failed;
2685 }
2686 if (r > 0) {
bf331d87 2687 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2688 return 0;
2689 }
2690
4f561e8e
TG		 2691 r = link_initialized(link, device);
2692 if (r < 0)
5c416fc4 2693 goto failed;
4f561e8e 2694 } else {
e6bf7774 2695 r = link_initialized_and_synced(link);
4f561e8e 2696 if (r < 0)
5c416fc4 2697 goto failed;
4f561e8e 2698 }
505f8da7 2699
a748b692 2700 return 0;
5c416fc4
TG		 2701failed:
2702 link_enter_failed(link);
2703 return r;
a748b692
TG		 2704}
2705
c601ebf7 2706int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2707 int r;
2708
2709 assert(link);
2710
2711 log_link_info(link, "Gained IPv6LL");
2712
c601ebf7 2713 link->ipv6ll_address = *address;
e7ab854c
TG		 2714 link_check_ready(link);
2715
b9ea3d2e 2716 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2717 r = link_acquire_ipv6_conf(link);
2718 if (r < 0) {
2719 link_enter_failed(link);
2720 return r;
2721 }
2722 }
2723
2724 return 0;
2725}
2726
3be9d62a
YW		 2727int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2728 sd_device_action_t action;
2729 Manager *m = userdata;
2730 Link *link = NULL;
2731 int r, ifindex;
2732
2733 assert(m);
2734 assert(device);
2735
2736 r = sd_device_get_action(device, &action);
2737 if (r < 0) {
2738 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2739 return 0;
2740 }
2741
2742 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2743 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2744 * still exists — and we are interested in that. */
2745 if (action == SD_DEVICE_REMOVE)
2746 return 0;
2747
2748 r = sd_device_get_ifindex(device, &ifindex);
2749 if (r < 0) {
2750 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2751 device_action_to_string(action));
2752 return 0;
2753 }
2754
2755 r = device_is_renaming(device);
2756 if (r < 0) {
2757 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2758 device_action_to_string(action));
2759 return 0;
2760 }
2761 if (r > 0) {
2762 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2763 return 0;
2764 }
2765
2766 r = link_get(m, ifindex, &link);
2767 if (r < 0) {
2768 if (r != -ENODEV)
2769 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2770 return 0;
2771 }
2772
2773 (void) link_initialized(link, device);
2774
2775 return 0;
2776}
2777
9c0a72f9
TG		 2778static int link_carrier_gained(Link *link) {
2779 int r;
2780
2781 assert(link);
2782
600b7898
YW		 2783 if (link->iftype == ARPHRD_CAN)
2784 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2785 return link_handle_bound_by_list(link);
2786
0894cfe4 2787 r = wifi_get_info(link);
8d968fdd
YW		 2788 if (r < 0)
2789 return r;
2790 if (r > 0) {
8bceafa7 2791 r = link_reconfigure(link, false);
572b21d9
YW		 2792 if (r < 0) {
2793 link_enter_failed(link);
8d968fdd 2794 return r;
572b21d9 2795 }
8d968fdd
YW		 2796 }
2797
b9ea3d2e 2798 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2799 r = link_acquire_conf(link);
2800 if (r < 0) {
2801 link_enter_failed(link);
2802 return r;
2803 }
6fc25497 2804
b425c3ae 2805 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2806 r = link_set_static_configs(link);
6fc25497
SS		 2807 if (r < 0)
2808 return r;
9c0a72f9
TG		 2809 }
2810
9a038aac 2811 return link_handle_bound_by_list(link);
9c0a72f9
TG		 2812}
2813
2814static int link_carrier_lost(Link *link) {
2815 int r;
2816
2817 assert(link);
2818
25e992ba 2819 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2820 return 0;
2821
600b7898
YW		 2822 if (link->iftype == ARPHRD_CAN)
2823 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2824 return link_handle_bound_by_list(link);
2825
fbdb6605 2826 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2827 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2828 * configuration and stop the clients as well. */
97e7fb39
SS		 2829 if (link->setting_mtu)
2830 return 0;
2831
2a99eed0 2832 r = link_stop_engines(link, false);
9c0a72f9
TG		 2833 if (r < 0) {
2834 link_enter_failed(link);
2835 return r;
2836 }
2837
19d9a5ad
YW		 2838 link_drop_requests(link);
2839
3104883d
SS		 2840 r = link_drop_config(link);
2841 if (r < 0)
2842 return r;
2843
2c7b826d 2844 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2845 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2846 r = link_drop_foreign_config(link);
2847 if (r < 0)
2848 return r;
2849 }
3104883d 2850
0d4ad91d
AR		 2851 r = link_handle_bound_by_list(link);
2852 if (r < 0)
2853 return r;
2854
9c0a72f9
TG		 2855 return 0;
2856}
2857
2858int link_carrier_reset(Link *link) {
2859 int r;
2860
2861 assert(link);
2862
2863 if (link_has_carrier(link)) {
2864 r = link_carrier_lost(link);
2865 if (r < 0)
2866 return r;
2867
2868 r = link_carrier_gained(link);
2869 if (r < 0)
2870 return r;
2871
6a7a4e4d 2872 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2873 }
2874
2875 return 0;
2876}
2877
d236718c
DS		 2878static int link_admin_state_up(Link *link) {
2879 int r;
2880
61135582
DS		 2881 assert(link);
2882
3be9d62a
YW		 2883 /* This is called every time an interface admin state changes to up;
2884 * specifically, when IFF_UP flag changes from unset to set. */
2885
61135582
DS		 2886 if (!link->network)
2887 return 0;
2888
2889 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2890 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2891 return link_down(link, NULL);
2892 }
2893
d236718c
DS		 2894 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2895 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2896 * ipv6_mtu_set prevents this from trying to set it too early before
2897 * the link->network has been setup; we only need to reset it
2898 * here if we've already set it during normal initialization. */
2899 if (link->ipv6_mtu_set) {
2900 r = link_set_ipv6_mtu(link);
2901 if (r < 0)
2902 return r;
2903 }
2904
2905 return 0;
2906}
2907
61135582 2908static int link_admin_state_down(Link *link) {
61135582
DS		 2909 assert(link);
2910
2911 if (!link->network)
2912 return 0;
2913
2914 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2915 if (streq_ptr(link->kind, "can") && !link->can_configured)
2916 /* CAN device needs to be down on configure. */
2917 return 0;
2918
61135582
DS		 2919 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2920 return link_up(link);
2921 }
2922
2923 return 0;
2924}
2925
3be9d62a 2926static int link_update(Link *link, sd_netlink_message *m) {
b8162cd2 2927 hw_addr_data hw_addr;
ca4e095a 2928 const char *ifname;
afe7fd56 2929 uint32_t mtu;
d236718c 2930 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2931 int old_master, r;
22936833 2932
dd3efc09 2933 assert(link);
b8941f74 2934 assert(link->ifname);
22936833
TG		 2935 assert(m);
2936
7619683b 2937 if (link->state == LINK_STATE_LINGER) {
5238e957 2938 log_link_info(link, "Link re-added");
289e6774 2939 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2940
2941 r = link_new_carrier_maps(link);
2942 if (r < 0)
2943 return r;
7619683b
TG		 2944 }
2945
1c4baffc 2946 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2947 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2948 Manager *manager = link->manager;
b8941f74 2949
30de2b89 2950 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2951
30de2b89
YW		 2952 link_drop(link);
2953 r = link_add(manager, m, &link);
2954 if (r < 0)
2955 return r;
0b54c870
YW		 2956 } else {
2957 r = link_update_alternative_names(link, m);
2958 if (r < 0)
2959 return r;
b8941f74
TG		 2960 }
2961
1c4baffc 2962 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2963 if (r >= 0 && mtu > 0) {
2964 link->mtu = mtu;
4e964aa0 2965 if (link->original_mtu == 0) {
afe7fd56 2966 link->original_mtu = mtu;
6a7a4e4d 2967 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2968 }
2969
2970 if (link->dhcp_client) {
3c9b8860
TG		 2971 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2972 link->mtu);
fc95c359
YW		 2973 if (r < 0)
2974 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2975 }
7465dd22
PF		 2976
2977 if (link->radv) {
2978 r = sd_radv_set_mtu(link->radv, link->mtu);
2979 if (r < 0)
2980 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2981 }
9842de0d 2982 }
69629de9 2983
e9189a1f
TG		 2984 /* The kernel may broadcast NEWLINK messages without the MAC address
2985 set, simply ignore them. */
b8162cd2
TR		 2986 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2987 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2988 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2989
b8162cd2 2990 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2991
b8162cd2 2992 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2993
a3adb4a6
YW		 2994 r = ipv4ll_update_mac(link);
2995 if (r < 0)
2996 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2997
d947f7f9
YW		 2998 r = dhcp4_update_mac(link);
2999 if (r < 0)
3000 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3001
eebba6dc
YW		 3002 r = dhcp6_update_mac(link);
3003 if (r < 0)
3004 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 3005
d0c4275c 3006 r = radv_update_mac(link);
be9363cc
YW		 3007 if (r < 0)
3008 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 3009
3010 if (link->ndisc) {
b8162cd2 3011 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 3012 if (r < 0)
3013 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3014 }
d93d655c 3015
dfc58b47
YW		 3016 if (link->lldp) {
3017 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
3018 if (r < 0)
3019 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
3020 }
3021
d93d655c
YW		 3022 r = ipv4_dad_update_mac(link);
3023 if (r < 0)
3024 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 3025 }
3026
bb262ef0
YW		 3027 old_master = link->master_ifindex;
3028 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3029
d236718c 3030 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3031 had_carrier = link_has_carrier(link);
3032
bb262ef0 3033 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3034 if (r < 0)
3035 return r;
3036
d236718c
DS		 3037 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3038 log_link_info(link, "Link UP");
3039
3040 r = link_admin_state_up(link);
3041 if (r < 0)
3042 return r;
61135582 3043 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 3044 log_link_info(link, "Link DOWN");
3045
61135582
DS		 3046 r = link_admin_state_down(link);
3047 if (r < 0)
3048 return r;
3049 }
3050
273eec24
LP		 3051 r = link_update_lldp(link);
3052 if (r < 0)
3053 return r;
3054
a61bb41c
TG		 3055 carrier_gained = !had_carrier && link_has_carrier(link);
3056 carrier_lost = had_carrier && !link_has_carrier(link);
3057
3058 if (carrier_gained) {
6a7a4e4d 3059 log_link_info(link, "Gained carrier");
a61bb41c 3060
9c0a72f9
TG		 3061 r = link_carrier_gained(link);
3062 if (r < 0)
3063 return r;
a61bb41c 3064 } else if (carrier_lost) {
6a7a4e4d 3065 log_link_info(link, "Lost carrier");
a61bb41c 3066
9c0a72f9
TG		 3067 r = link_carrier_lost(link);
3068 if (r < 0)
a61bb41c 3069 return r;
a61bb41c
TG		 3070 }
3071
3072 return 0;
dd3efc09 3073}
fe8db0c5 3074
3be9d62a
YW		 3075int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
3076 Link *link = NULL;
3077 NetDev *netdev = NULL;
3078 uint16_t type;
3079 const char *name;
3080 int r, ifindex;
3081
3082 assert(rtnl);
3083 assert(message);
3084 assert(m);
3085
3086 if (sd_netlink_message_is_error(message)) {
3087 r = sd_netlink_message_get_errno(message);
3088 if (r < 0)
3089 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
3090
3091 return 0;
3092 }
3093
3094 r = sd_netlink_message_get_type(message, &type);
3095 if (r < 0) {
3096 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
3097 return 0;
3098 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
3099 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
3100 return 0;
3101 }
3102
3103 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
3104 if (r < 0) {
3105 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
3106 return 0;
3107 } else if (ifindex <= 0) {
3108 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
3109 return 0;
3110 }
3111
3112 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
3113 if (r < 0) {
3114 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
3115 return 0;
3116 }
3117
3118 (void) link_get(m, ifindex, &link);
3119 (void) netdev_get(m, name, &netdev);
3120
3121 switch (type) {
3122 case RTM_NEWLINK:
3123 if (!link) {
3124 /* link is new, so add it */
3125 r = link_add(m, message, &link);
3126 if (r < 0) {
3127 log_warning_errno(r, "Could not process new link message, ignoring: %m");
3128 return 0;
3129 }
3130 }
3131
3132 if (netdev) {
3133 /* netdev exists, so make sure the ifindex matches */
3134 r = netdev_set_ifindex(netdev, message);
3135 if (r < 0) {
3136 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
3137 return 0;
3138 }
3139 }
3140
3141 r = link_update(link, message);
3142 if (r < 0) {
3143 log_warning_errno(r, "Could not process link message, ignoring: %m");
3144 return 0;
3145 }
3146
3147 break;
3148
3149 case RTM_DELLINK:
3150 link_drop(link);
3151 netdev_drop(netdev);
3152
3153 break;
3154
3155 default:
3156 assert_not_reached("Received link message with invalid RTNL message type.");
3157 }
3158
3159 return 1;
3160}
3161
fe8db0c5 3162static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3163 [LINK_STATE_PENDING] = "pending",
bd08ce56 3164 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3165 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3166 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3167 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3168 [LINK_STATE_FAILED] = "failed",
370e9930 3169 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3170};
3171
3172DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
Unnamed repository; edit this file 'description' to name the repository.