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network: introduce link_get_master() and use it where applicable
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
8430841b 7#include <sys/socket.h>
4cc7a82c 8#include <unistd.h>
f579559b 9
b5efdb8a 10#include "alloc-util.h"
c0267a59 11#include "batadv.h"
737f1405
YW		 12#include "bond.h"
13#include "bridge.h"
1346b1f0 14#include "bus-util.h"
3be9d62a
YW		 15#include "device-private.h"
16#include "device-util.h"
27dfc982 17#include "dhcp-identifier.h"
bd91b83e 18#include "dhcp-lease-internal.h"
686d13b9 19#include "env-file.h"
4bb7cc82 20#include "ethtool-util.h"
3ffd4af2 21#include "fd-util.h"
cf1d700d 22#include "fileio.h"
af664001 23#include "fs-util.h"
737f1405 24#include "ipvlan.h"
ef118d00 25#include "missing_network.h"
cf1d700d 26#include "netlink-util.h"
c6f7c917 27#include "network-internal.h"
fb486c90 28#include "networkd-address-label.h"
093e3533 29#include "networkd-address.h"
9671ae9d 30#include "networkd-bridge-fdb.h"
ff9e0783 31#include "networkd-bridge-mdb.h"
3ddcbeea 32#include "networkd-can.h"
8fcf1d61 33#include "networkd-dhcp-server.h"
ca5ad760
YW		 34#include "networkd-dhcp4.h"
35#include "networkd-dhcp6.h"
36#include "networkd-ipv4ll.h"
76c5a0f2 37#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 38#include "networkd-link-bus.h"
39#include "networkd-link.h"
8e1ad1ea 40#include "networkd-lldp-tx.h"
23f53b99 41#include "networkd-manager.h"
1e7a0e21 42#include "networkd-ndisc.h"
e4a71bf3 43#include "networkd-neighbor.h"
75156ccb 44#include "networkd-nexthop.h"
19d9a5ad 45#include "networkd-queue.h"
7465dd22 46#include "networkd-radv.h"
bce67bbe 47#include "networkd-routing-policy-rule.h"
0fa8ee6c 48#include "networkd-setlink.h"
19d9a5ad 49#include "networkd-sriov.h"
3b5a4fc6 50#include "networkd-state-file.h"
19d9a5ad 51#include "networkd-sysctl.h"
8d968fdd 52#include "networkd-wifi.h"
cf1d700d
TG		 53#include "set.h"
54#include "socket-util.h"
bf331d87 55#include "stat-util.h"
15a5e950 56#include "stdio-util.h"
8b43440b 57#include "string-table.h"
51517f9e 58#include "strv.h"
34658df2 59#include "tc.h"
e4de7287 60#include "tmpfile-util.h"
299ad32d 61#include "udev-util.h"
cf1d700d 62#include "util.h"
737f1405 63#include "vrf.h"
fc2f9534 64
3ca1fab7 65bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
500b96eb 74 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 75 return false;
76
98d20a17 77 if (STRPTR_IN_SET(link->kind,
78 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 79 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 80 return false;
81
f410d463
YW		 82 /* L3 or L3S mode do not support ARP. */
83 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
84 return false;
85
f2bfcdb9
YW		 86 if (link->network->bond)
87 return false;
88
3ca1fab7 89 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 90}
91
f8f2f880 92bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 93 assert(link);
94
fa709992
LP		 95 if (!socket_ipv6_is_supported())
96 return false;
97
d0d6a4cd
TG		 98 if (link->flags & IFF_LOOPBACK)
99 return false;
100
101 if (!link->network)
102 return false;
103
500b96eb 104 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 105 return false;
106
107 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 108 return false;
109
f2bfcdb9
YW		 110 if (link->network->bond)
111 return false;
112
e0ee46f2 113 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 114}
115
5e0534f1 116bool link_ipv6_enabled(Link *link) {
439689c6
SS		 117 assert(link);
118
119 if (!socket_ipv6_is_supported())
120 return false;
121
b102cdca 122 if (link->network->bond)
2b00a4e0
TY		 123 return false;
124
500b96eb 125 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 126 return false;
127
4cef7fe3 128 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 129 if (link_ipv6ll_enabled(link))
130 return true;
131
132 if (network_has_static_ipv6_configurations(link->network))
133 return true;
134
135 return false;
439689c6
SS		 136}
137
7191a57a
YW		 138bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
139 assert(link);
140
8e4b1b35 141 if (!link->network) {
7191a57a
YW		 142 if (!allow_unmanaged)
143 return false;
144
145 return link_has_carrier(link);
146 }
147
148 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
149 return false;
150
151 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
152 return false;
153
0fa8ee6c
YW		 154 if (link->set_link_messages > 0)
155 return false;
156
71a754f7
YW		 157 /* TODO: enable this check when link_request_to_create_stacked_netdev() is used.
158 if (!link->stacked_netdevs_created)
159 return false;
160 */
161
7191a57a
YW		 162 return true;
163}
164
34bf3c00
YW		 165static bool link_is_enslaved(Link *link) {
166 if (link->flags & IFF_SLAVE)
167 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
168 return true;
169
34bf3c00
YW		 170 if (!link->network)
171 return false;
172
bb262ef0 173 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 174 return true;
175
bb262ef0
YW		 176 /* TODO: add conditions for other netdevs. */
177
34bf3c00
YW		 178 return false;
179}
180
8430841b
L		 181static LinkAddressState address_state_from_scope(uint8_t scope) {
182 if (scope < RT_SCOPE_SITE)
183 /* universally accessible addresses found */
184 return LINK_ADDRESS_STATE_ROUTABLE;
185
186 if (scope < RT_SCOPE_HOST)
187 /* only link or site local addresses found */
188 return LINK_ADDRESS_STATE_DEGRADED;
189
190 /* no useful addresses found */
191 return LINK_ADDRESS_STATE_OFF;
192}
193
45e11abf 194void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 195 LinkOperationalState operstate;
1678fbb3 196 LinkCarrierState carrier_state;
8430841b 197 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
bcdcc596 198 LinkOnlineState online_state;
35c5a9ca 199 _cleanup_strv_free_ char **p = NULL;
90afec18 200 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 201 bool changed = false;
1678fbb3 202 Address *address;
14153d1b 203
84de38c5
TG		 204 assert(link);
205
206 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 207 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 208 else if (link_has_carrier(link)) {
1678fbb3
YW		 209 if (link_is_enslaved(link))
210 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 211 else
1678fbb3 212 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 213 } else if (link->flags & IFF_UP)
1678fbb3 214 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 215 else
1678fbb3 216 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 217
1678fbb3 218 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 219 Link *slave;
220
90e74a66 221 SET_FOREACH(slave, link->slaves) {
959f65d3 222 link_update_operstate(slave, false);
84de38c5 223
1678fbb3
YW		 224 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
225 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 226 }
959f65d3 227 }
84de38c5 228
90e74a66 229 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 230 if (!address_is_ready(address))
231 continue;
84de38c5 232
90afec18
YW		 233 if (address->family == AF_INET)
234 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 235
90afec18
YW		 236 if (address->family == AF_INET6)
237 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 238 }
84de38c5 239
1678fbb3 240 /* for operstate we also take foreign addresses into account */
90e74a66 241 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 242 if (!address_is_ready(address))
243 continue;
244
90afec18
YW		 245 if (address->family == AF_INET)
246 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 247
90afec18
YW		 248 if (address->family == AF_INET6)
249 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 250 }
251
8430841b
L		 252 ipv4_address_state = address_state_from_scope(ipv4_scope);
253 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 254 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 255
256 /* Mapping of address and carrier state vs operational state
257 * carrier state
258 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
259 * ------------------------------------------------------------------------------
260 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
261 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
262 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
263 */
84de38c5 264
1678fbb3
YW		 265 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
266 operstate = (LinkOperationalState) carrier_state;
267 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
268 operstate = LINK_OPERSTATE_ROUTABLE;
269 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
270 operstate = LINK_OPERSTATE_DEGRADED;
271 else
14153d1b
YW		 272 operstate = LINK_OPERSTATE_ENSLAVED;
273
bcdcc596
AŠ		 274 /* Only determine online state for managed links with RequiredForOnline=yes */
275 if (!link->network || !link->network->required_for_online)
276 online_state = _LINK_ONLINE_STATE_INVALID;
277 else if (operstate < link->network->required_operstate_for_online.min ||
278 operstate > link->network->required_operstate_for_online.max)
279 online_state = LINK_ONLINE_STATE_OFFLINE;
280 else {
281 AddressFamily required_family = link->network->required_family_for_online;
282 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
283 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
284
285 /* The operational state is within the range required for online.
286 * If a particular address family is also required, we might revert
287 * to offline in the blocks below.
288 */
289 online_state = LINK_ONLINE_STATE_ONLINE;
290
291 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
292 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
293 online_state = LINK_ONLINE_STATE_OFFLINE;
294 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
295 online_state = LINK_ONLINE_STATE_OFFLINE;
296 }
297
298 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
299 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
300 online_state = LINK_ONLINE_STATE_OFFLINE;
301 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
302 online_state = LINK_ONLINE_STATE_OFFLINE;
303 }
304 }
305
35c5a9ca
YW		 306 if (link->carrier_state != carrier_state) {
307 link->carrier_state = carrier_state;
308 changed = true;
309 if (strv_extend(&p, "CarrierState") < 0)
310 log_oom();
311 }
959f65d3 312
35c5a9ca
YW		 313 if (link->address_state != address_state) {
314 link->address_state = address_state;
315 changed = true;
316 if (strv_extend(&p, "AddressState") < 0)
317 log_oom();
959f65d3
YW		 318 }
319
8430841b
L		 320 if (link->ipv4_address_state != ipv4_address_state) {
321 link->ipv4_address_state = ipv4_address_state;
322 changed = true;
323 if (strv_extend(&p, "IPv4AddressState") < 0)
324 log_oom();
325 }
326
327 if (link->ipv6_address_state != ipv6_address_state) {
328 link->ipv6_address_state = ipv6_address_state;
329 changed = true;
330 if (strv_extend(&p, "IPv6AddressState") < 0)
331 log_oom();
332 }
333
84de38c5
TG		 334 if (link->operstate != operstate) {
335 link->operstate = operstate;
35c5a9ca
YW		 336 changed = true;
337 if (strv_extend(&p, "OperationalState") < 0)
338 log_oom();
84de38c5 339 }
959f65d3 340
bcdcc596
AŠ		 341 if (link->online_state != online_state) {
342 link->online_state = online_state;
343 changed = true;
344 if (strv_extend(&p, "OnlineState") < 0)
345 log_oom();
346 }
347
35c5a9ca
YW		 348 if (p)
349 link_send_changed_strv(link, p);
350 if (changed)
351 link_dirty(link);
352
81357285
YW		 353 if (also_update_master) {
354 Link *master;
355
356 if (link_get_master(link, &master) >= 0)
357 link_update_operstate(master, true);
959f65d3 358 }
84de38c5
TG		 359}
360
51d18171
TG		 361#define FLAG_STRING(string, flag, old, new) \
362 (((old ^ new) & flag) \
363 ? ((old & flag) ? (" -" string) : (" +" string)) \
364 : "")
365
bb262ef0 366static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 367 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
368 uint8_t operstate;
369 int r;
370
371 assert(link);
372
373 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 374 if (r < 0)
375 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 376
1c4baffc 377 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 378 if (r < 0)
379 /* if we got a message without operstate, take it to mean
380 the state was unchanged */
381 operstate = link->kernel_operstate;
382
bb262ef0 383 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 384 return 0;
385
386 if (link->flags != flags) {
6a7a4e4d 387 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		 388 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
389 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
390 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
391 FLAG_STRING("UP", IFF_UP, link->flags, flags),
392 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
393 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
394 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
395 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
396 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
397 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
398 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
399 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
400 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
401 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
402 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
403 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
404 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
405 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
406 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
407
408 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
409 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
410 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
411 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
412 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
413 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
414 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
415 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
416
417 /* link flags are currently at most 18 bits, let's align to
418 * printing 20 */
419 if (unknown_flags_added)
79008bdd 420 log_link_debug(link,
6a7a4e4d 421 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 422 unknown_flags_added);
423
424 if (unknown_flags_removed)
79008bdd 425 log_link_debug(link,
6a7a4e4d 426 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 427 unknown_flags_removed);
428 }
429
430 link->flags = flags;
431 link->kernel_operstate = operstate;
432
959f65d3 433 link_update_operstate(link, true);
51d18171
TG		 434
435 return 0;
436}
437
15761549
YW		 438void link_ntp_settings_clear(Link *link) {
439 link->ntp = strv_free(link->ntp);
440}
441
442void link_dns_settings_clear(Link *link) {
f5fbe71d 443 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 444 for (unsigned i = 0; i < link->n_dns; i++)
445 in_addr_full_free(link->dns[i]);
15761549 446 link->dns = mfree(link->dns);
f5fbe71d 447 link->n_dns = UINT_MAX;
15761549 448
6e4571f0
YW		 449 link->search_domains = ordered_set_free(link->search_domains);
450 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 451
452 link->dns_default_route = -1;
453 link->llmnr = _RESOLVE_SUPPORT_INVALID;
454 link->mdns = _RESOLVE_SUPPORT_INVALID;
455 link->dnssec_mode = _DNSSEC_MODE_INVALID;
456 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
457
458 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
459}
460
1a6bb31f
YW		 461static void link_free_engines(Link *link) {
462 if (!link)
463 return;
464
465 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
466 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
467 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 468 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 469
470 link->lldp = sd_lldp_unref(link->lldp);
1c494872 471 link_lldp_emit_stop(link);
1a6bb31f
YW		 472
473 ndisc_flush(link);
474
475 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
476 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 477 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 478 link->ndisc = sd_ndisc_unref(link->ndisc);
479 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 480
481 ipv4_dad_unref(link);
1a6bb31f
YW		 482}
483
8301aa0b 484static Link *link_free(Link *link) {
8301aa0b 485 assert(link);
f579559b 486
15761549
YW		 487 link_ntp_settings_clear(link);
488 link_dns_settings_clear(link);
489
8eec0b9d
YW		 490 link->routes = set_free(link->routes);
491 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 492 link->dhcp_routes = set_free(link->dhcp_routes);
493 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 494 link->dhcp6_routes = set_free(link->dhcp6_routes);
495 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
496 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
497 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 498 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 499
8eec0b9d
YW		 500 link->nexthops = set_free(link->nexthops);
501 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 502
8eec0b9d
YW		 503 link->neighbors = set_free(link->neighbors);
504 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 505
8eec0b9d
YW		 506 link->addresses = set_free(link->addresses);
507 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 508 link->pool_addresses = set_free(link->pool_addresses);
e5526518 509 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 510 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
511 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
512 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
513 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 514 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 515
4b409e85
YW		 516 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
517
1a6bb31f 518 link_free_engines(link);
49699bac 519
c166a070 520 free(link->ifname);
572b21d9 521 strv_free(link->alternative_names);
ceac4078 522 free(link->kind);
8d968fdd 523 free(link->ssid);
c643bda5 524 free(link->driver);
6cad256d 525
a34e58d4
YW		 526 unlink_and_free(link->lease_file);
527 unlink_and_free(link->lldp_file);
528 unlink_and_free(link->state_file);
c166a070 529
51517f9e 530 sd_device_unref(link->sd_device);
b5db00e5 531
0d4ad91d 532 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 533 hashmap_free(link->bound_by_links);
534
5f707e12 535 set_free_with_destructor(link->slaves, link_unref);
033295c1 536
c9c908a6
YW		 537 network_unref(link->network);
538
8301aa0b 539 return mfree(link);
14b746f7
TG		 540}
541
8301aa0b 542DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 543
11a7f229
TG		 544int link_get(Manager *m, int ifindex, Link **ret) {
545 Link *link;
11a7f229
TG		 546
547 assert(m);
e856ed00 548 assert(ifindex > 0);
11a7f229 549
ae06ab10 550 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 551 if (!link)
552 return -ENODEV;
553
0b54c870
YW		 554 if (ret)
555 *ret = link;
556 return 0;
557}
558
559int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
560 Link *link;
561
562 assert(m);
563 assert(ifname);
11a7f229 564
0b54c870
YW		 565 link = hashmap_get(m->links_by_name, ifname);
566 if (!link)
567 return -ENODEV;
568
569 if (ret)
570 *ret = link;
11a7f229
TG		 571 return 0;
572}
573
81357285
YW		 574int link_get_master(Link *link, Link **ret) {
575 assert(link);
576 assert(link->manager);
577 assert(ret);
578
579 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
580 return -ENODEV;
581
582 return link_get(link->manager, link->master_ifindex, ret);
583}
584
af9ba57a 585void link_set_state(Link *link, LinkState state) {
e331e246
TG		 586 assert(link);
587
588 if (link->state == state)
589 return;
590
0beb9542
YW		 591 log_link_debug(link, "State changed: %s -> %s",
592 link_state_to_string(link->state),
593 link_state_to_string(state));
594
e331e246
TG		 595 link->state = state;
596
597 link_send_changed(link, "AdministrativeState", NULL);
9092113d 598 link_dirty(link);
e331e246
TG		 599}
600
57bd6899
TG		 601static void link_enter_unmanaged(Link *link) {
602 assert(link);
603
e331e246 604 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 605}
606
2a99eed0 607int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 608 int r = 0, k;
609
610 assert(link);
611 assert(link->manager);
612 assert(link->manager->event);
613
80060352
ZJS		 614 bool keep_dhcp = may_keep_dhcp &&
615 link->network &&
616 (link->manager->restarting ||
617 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
618
84add3cd 619 if (!keep_dhcp) {
111bb8f9 620 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 621 if (k < 0)
36c7d709 622 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 623 }
624
84add3cd
YW		 625 k = sd_ipv4acd_stop(link->dhcp_acd);
626 if (k < 0)
627 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 628
2a99eed0
YW		 629 k = sd_dhcp_server_stop(link->dhcp_server);
630 if (k < 0)
631 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
632
9cc65242
YW		 633 k = sd_lldp_stop(link->lldp);
634 if (k < 0)
635 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
636
84add3cd
YW		 637 k = sd_ipv4ll_stop(link->ipv4ll);
638 if (k < 0)
639 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 640
490ccbd5 641 k = ipv4_dad_stop(link);
2488e4d9
YW		 642 if (k < 0)
643 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 644
84add3cd
YW		 645 k = sd_dhcp6_client_stop(link->dhcp6_client);
646 if (k < 0)
647 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 648
2ffd6d73
YW		 649 k = dhcp6_pd_remove(link);
650 if (k < 0)
651 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 652
84add3cd
YW		 653 k = sd_ndisc_stop(link->ndisc);
654 if (k < 0)
655 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 656
84add3cd
YW		 657 k = sd_radv_stop(link->radv);
658 if (k < 0)
659 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 660
7272b25e 661 link_lldp_emit_stop(link);
111bb8f9
TG		 662 return r;
663}
664
b22d8a00 665void link_enter_failed(Link *link) {
ef1ba606 666 assert(link);
f882c247 667
370e9930 668 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 669 return;
670
6a7a4e4d 671 log_link_warning(link, "Failed");
449f7554 672
e331e246 673 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 674
2a99eed0 675 (void) link_stop_engines(link, false);
f882c247
TG		 676}
677
7033af49
YW		 678static int link_join_netdevs_after_configured(Link *link) {
679 NetDev *netdev;
7033af49
YW		 680 int r;
681
90e74a66 682 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 683 if (netdev->ifindex > 0)
684 /* Assume already enslaved. */
685 continue;
686
687 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
688 continue;
689
690 log_struct(LOG_DEBUG,
691 LOG_LINK_INTERFACE(link),
692 LOG_NETDEV_INTERFACE(netdev),
693 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
694
695 r = netdev_join(netdev, link, NULL);
696 if (r < 0)
697 return log_struct_errno(LOG_WARNING, r,
698 LOG_LINK_INTERFACE(link),
699 LOG_NETDEV_INTERFACE(netdev),
700 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
701 }
702
703 return 0;
704}
705
e3a7b048 706static void link_enter_configured(Link *link) {
dd43110f
TG		 707 assert(link);
708 assert(link->network);
e3a7b048 709
289e6774 710 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 711 return;
dd43110f 712
e331e246 713 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 714
7033af49 715 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 716}
717
6accfd31
DA		 718void link_check_ready(Link *link) {
719 Address *a;
6accfd31
DA		 720
721 assert(link);
722
5f58af25
YW		 723 if (link->state == LINK_STATE_CONFIGURED)
724 return;
725
d19b9939
YW		 726 if (link->state != LINK_STATE_CONFIGURING)
727 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 728
729 if (!link->network)
730 return;
731
600b7898
YW		 732 if (link->iftype == ARPHRD_CAN) {
733 /* let's shortcut things for CAN which doesn't need most of checks below. */
734 if (!link->can_configured)
735 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
736
737 link_enter_configured(link);
738 return;
739 }
740
76c5a0f2 741 if (!link->static_addresses_configured)
d19b9939 742 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 743
90e74a66 744 SET_FOREACH(a, link->addresses)
39373cb9
YW		 745 if (!address_is_ready(a)) {
746 _cleanup_free_ char *str = NULL;
747
5380707a
YW		 748 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
749 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 750 }
6aa5773b 751
354bc760
YW		 752 if (!link->static_address_labels_configured)
753 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
754
e5b35bf6
YW		 755 if (!link->static_bridge_fdb_configured)
756 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
757
ff9e0783
YW		 758 if (!link->static_bridge_mdb_configured)
759 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
760
fdeba3f5
YW		 761 if (!link->static_ipv6_proxy_ndp_configured)
762 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
763
40ca350e
YW		 764 if (!link->static_neighbors_configured)
765 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
766
d19b9939
YW		 767 if (!link->static_nexthops_configured)
768 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 769
76c5a0f2
YW		 770 if (!link->static_routes_configured)
771 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
772
0e5ef6be 773 if (!link->static_routing_policy_rules_configured)
d19b9939 774 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 775
d19b9939
YW		 776 if (!link->tc_configured)
777 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 778
d19b9939
YW		 779 if (!link->sr_iov_configured)
780 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 781
463797c1 782 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 783 bool has_ndisc_address = false;
784 NDiscAddress *n;
6accfd31 785
94876904
YW		 786 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
787 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 788
90e74a66 789 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 790 if (!n->marked) {
791 has_ndisc_address = true;
792 break;
793 }
794
8cd37e43 795 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 796 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 797 !link->ipv4ll_address_configured)
798 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
799 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 800
0d0799da
YW		 801 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
802 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 803 if (!link->dhcp4_configured &&
804 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
805 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 806 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 807 !link->ipv4ll_address_configured)
808 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 809 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 810
0d0799da 811 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		 812 __func__,
813 yes_no(link->dhcp4_configured),
0d0799da 814 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 815 yes_no(link->dhcp6_address_configured),
816 yes_no(link->dhcp6_route_configured),
817 yes_no(link->dhcp6_pd_address_configured),
818 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 819 yes_no(link->ndisc_addresses_configured),
820 yes_no(link->ndisc_routes_configured));
39373cb9 821 }
463797c1 822 }
6accfd31 823
5f58af25 824 link_enter_configured(link);
6accfd31
DA		 825}
826
97108953 827static int link_request_static_configs(Link *link) {
f882c247
TG		 828 int r;
829
830 assert(link);
831 assert(link->network);
f5be5601 832 assert(link->state != _LINK_STATE_INVALID);
f882c247 833
354bc760 834 r = link_request_static_addresses(link);
0e5ef6be
YW		 835 if (r < 0)
836 return r;
837
354bc760 838 r = link_request_static_address_labels(link);
f3ef324d
YW		 839 if (r < 0)
840 return r;
e4a71bf3 841
e5b35bf6
YW		 842 r = link_request_static_bridge_fdb(link);
843 if (r < 0)
844 return r;
845
9a038aac
YW		 846 r = link_request_static_bridge_mdb(link);
847 if (r < 0)
848 return r;
849
fdeba3f5
YW		 850 r = link_request_static_ipv6_proxy_ndp_addresses(link);
851 if (r < 0)
852 return r;
853
40ca350e 854 r = link_request_static_neighbors(link);
682c65b0
YW		 855 if (r < 0)
856 return r;
bd6379ec 857
76c5a0f2 858 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 859 if (r < 0)
860 return r;
f882c247 861
76c5a0f2
YW		 862 r = link_request_static_routes(link, false);
863 if (r < 0)
864 return r;
865
866 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 867 if (r < 0)
868 return r;
d4cdbea5 869
f882c247
TG		 870 return 0;
871}
872
e16e4b3b
DS		 873static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
874 int r;
875
876 assert(link);
877
878 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
879 return 1;
880
881 r = sd_netlink_message_get_errno(m);
882 if (r < 0)
883 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
884 else
885 log_link_debug(link, "Setting nomaster done.");
886
887 return 1;
888}
889
890static int link_set_nomaster(Link *link) {
891 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
892 int r;
893
894 assert(link);
895 assert(link->network);
896 assert(link->manager);
897 assert(link->manager->rtnl);
898
899 /* set it free if not enslaved with networkd */
c0267a59 900 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 901 return 0;
902
903 log_link_debug(link, "Setting nomaster");
904
905 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
906 if (r < 0)
907 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
908
909 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
910 if (r < 0)
911 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
912
913 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
914 link_netlink_destroy_callback, link);
915 if (r < 0)
916 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
917
918 link_ref(link);
919
920 return 0;
921}
922
8566df79 923static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 924 int r;
925
926 assert(link);
927
086b8853 928 if (link->radv) {
7465dd22 929 assert(link->radv);
94876904 930 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 931
932 log_link_debug(link, "Starting IPv6 Router Advertisements");
933
fd3ef936
YW		 934 r = radv_emit_dns(link);
935 if (r < 0)
936 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
937
7465dd22
PF		 938 r = sd_radv_start(link->radv);
939 if (r < 0 && r != -EBUSY)
940 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
941 }
942
294f129b
YW		 943 r = ndisc_start(link);
944 if (r < 0)
945 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 946
294f129b
YW		 947 r = dhcp6_start(link);
948 if (r < 0)
949 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 950
1633c457
YW		 951 r = dhcp6_request_prefix_delegation(link);
952 if (r < 0)
953 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 954
e7ab854c
TG		 955 return 0;
956}
957
8566df79 958static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 959 int r;
960
961 assert(link);
ff254138
TG		 962 assert(link->manager);
963 assert(link->manager->event);
964
0107b769 965 if (link->dhcp_client) {
294f129b 966 r = dhcp4_start(link);
0107b769 967 if (r < 0)
294f129b 968 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 969
0b4b66cc 970 } else if (link->ipv4ll) {
6a7a4e4d 971 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 972
973 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 974 if (r < 0)
975 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 976 }
977
ab486ef4
YW		 978 if (link->dhcp_server) {
979 r = sd_dhcp_server_start(link->dhcp_server);
980 if (r < 0)
981 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
982 }
983
6fc25497
SS		 984 return 0;
985}
986
8566df79 987static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 988 int r;
989
990 assert(link);
991
8566df79 992 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 993 if (r < 0)
994 return r;
995
94876904 996 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 997 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 998 if (r < 0)
999 return r;
1000 }
1001
2ffd6d73
YW		 1002 r = link_lldp_emit_start(link);
1003 if (r < 0)
1004 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1005
ff254138
TG		 1006 return 0;
1007}
1008
a61bb41c 1009bool link_has_carrier(Link *link) {
deb2e523
TG		 1010 /* see Documentation/networking/operstates.txt in the kernel sources */
1011
a61bb41c 1012 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1013 return true;
1014
a61bb41c 1015 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1016 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1017 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1018 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1019 return true;
1020
1021 return false;
1022}
1023
302a796f 1024static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1025 int r;
1026
1746cf2a
TG		 1027 assert(link);
1028
5da8149f 1029 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1030 return 1;
1031
1c4baffc 1032 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1033 if (r < 0)
26d6b214 1034 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1035 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1036
f882c247
TG		 1037 return 1;
1038}
1039
f282ce20 1040int link_up(Link *link) {
4afd3348 1041 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1042 int r;
1043
f882c247 1044 assert(link);
c106cc36 1045 assert(link->network);
f882c247
TG		 1046 assert(link->manager);
1047 assert(link->manager->rtnl);
1048
6a7a4e4d 1049 log_link_debug(link, "Bringing link up");
449f7554 1050
6a7a4e4d
LP		 1051 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1052 if (r < 0)
1053 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1054
5d4795f3 1055 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1056 if (r < 0)
1057 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1058
302a796f
YW		 1059 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1060 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1061 if (r < 0)
1062 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1063
b226d99b
TG		 1064 link_ref(link);
1065
f882c247
TG		 1066 return 0;
1067}
1068
302a796f 1069static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1070 int r;
1071
1072 assert(link);
1073
1074 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1075 return 1;
1076
1c4baffc 1077 r = sd_netlink_message_get_errno(m);
0d4ad91d 1078 if (r < 0)
5ecb131d 1079 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1080
1081 return 1;
1082}
1083
8e54db83 1084int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1085 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1086 int r;
1087
1088 assert(link);
1089 assert(link->manager);
1090 assert(link->manager->rtnl);
1091
6a7a4e4d 1092 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1093
1094 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1095 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1096 if (r < 0)
1097 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1098
1099 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1100 if (r < 0)
1101 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1102
8e54db83
YW		 1103 r = netlink_call_async(link->manager->rtnl, NULL, req,
1104 callback ?: link_down_handler,
302a796f 1105 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1106 if (r < 0)
1107 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1108
1109 link_ref(link);
1110
1111 return 0;
1112}
1113
1114static int link_handle_bound_to_list(Link *link) {
1115 Link *l;
0d4ad91d
AR		 1116 int r;
1117 bool required_up = false;
1118 bool link_is_up = false;
1119
1120 assert(link);
1121
1122 if (hashmap_isempty(link->bound_to_links))
1123 return 0;
1124
1125 if (link->flags & IFF_UP)
1126 link_is_up = true;
1127
90e74a66 1128 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1129 if (link_has_carrier(l)) {
1130 required_up = true;
1131 break;
1132 }
1133
1134 if (!required_up && link_is_up) {
8e54db83 1135 r = link_down(link, NULL);
0d4ad91d
AR		 1136 if (r < 0)
1137 return r;
1138 } else if (required_up && !link_is_up) {
1139 r = link_up(link);
1140 if (r < 0)
1141 return r;
1142 }
1143
1144 return 0;
1145}
1146
1147static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1148 Link *l;
1149 int r;
1150
1151 assert(link);
1152
1153 if (hashmap_isempty(link->bound_by_links))
1154 return 0;
1155
90e74a66 1156 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1157 r = link_handle_bound_to_list(l);
1158 if (r < 0)
1159 return r;
1160 }
1161
1162 return 0;
1163}
1164
1165static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1166 int r;
1167
1168 assert(link);
1169 assert(carrier);
1170
1171 if (link == carrier)
1172 return 0;
1173
1174 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1175 return 0;
1176
190b3b5c 1177 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1178 if (r < 0)
1179 return r;
1180
9092113d
YW		 1181 link_dirty(link);
1182
0d4ad91d
AR		 1183 return 0;
1184}
1185
1186static int link_new_bound_by_list(Link *link) {
1187 Manager *m;
1188 Link *carrier;
0d4ad91d 1189 int r;
0d4ad91d
AR		 1190
1191 assert(link);
1192 assert(link->manager);
1193
1194 m = link->manager;
1195
90e74a66 1196 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1197 if (!carrier->network)
1198 continue;
1199
1200 if (strv_isempty(carrier->network->bind_carrier))
1201 continue;
1202
191a3f16 1203 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1204 r = link_put_carrier(link, carrier, &link->bound_by_links);
1205 if (r < 0)
1206 return r;
0d4ad91d
AR		 1207 }
1208 }
1209
90e74a66 1210 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1211 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1212 if (r < 0)
1213 return r;
0d4ad91d
AR		 1214 }
1215
1216 return 0;
1217}
1218
1219static int link_new_bound_to_list(Link *link) {
1220 Manager *m;
1221 Link *carrier;
0d4ad91d 1222 int r;
0d4ad91d
AR		 1223
1224 assert(link);
1225 assert(link->manager);
1226
1227 if (!link->network)
1228 return 0;
1229
1230 if (strv_isempty(link->network->bind_carrier))
1231 return 0;
1232
1233 m = link->manager;
1234
90e74a66 1235 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1236 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1237 r = link_put_carrier(link, carrier, &link->bound_to_links);
1238 if (r < 0)
1239 return r;
0d4ad91d
AR		 1240 }
1241 }
1242
90e74a66 1243 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1244 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1245 if (r < 0)
1246 return r;
0d4ad91d
AR		 1247 }
1248
1249 return 0;
1250}
1251
1252static int link_new_carrier_maps(Link *link) {
1253 int r;
1254
1255 r = link_new_bound_by_list(link);
1256 if (r < 0)
1257 return r;
1258
1259 r = link_handle_bound_by_list(link);
1260 if (r < 0)
1261 return r;
1262
1263 r = link_new_bound_to_list(link);
1264 if (r < 0)
1265 return r;
1266
1267 r = link_handle_bound_to_list(link);
1268 if (r < 0)
1269 return r;
1270
1271 return 0;
1272}
1273
1274static void link_free_bound_to_list(Link *link) {
9092113d 1275 bool updated = false;
0d4ad91d 1276 Link *bound_to;
0d4ad91d 1277
9092113d
YW		 1278 assert(link);
1279
1280 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1281 updated = true;
0d4ad91d
AR		 1282
1283 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1284 link_dirty(bound_to);
0d4ad91d
AR		 1285 }
1286
9092113d
YW		 1287 if (updated)
1288 link_dirty(link);
1289
0d4ad91d
AR		 1290 return;
1291}
1292
1293static void link_free_bound_by_list(Link *link) {
9092113d 1294 bool updated = false;
0d4ad91d 1295 Link *bound_by;
0d4ad91d 1296
9092113d
YW		 1297 assert(link);
1298
1299 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1300 updated = true;
0d4ad91d
AR		 1301
1302 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1303 link_dirty(bound_by);
0d4ad91d
AR		 1304 link_handle_bound_to_list(bound_by);
1305 }
1306 }
1307
9092113d
YW		 1308 if (updated)
1309 link_dirty(link);
1310
0d4ad91d
AR		 1311 return;
1312}
1313
1314static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1315 assert(link);
1316
9092113d
YW		 1317 link_free_bound_to_list(link);
1318 link_free_bound_by_list(link);
0d4ad91d
AR		 1319
1320 return;
1321}
1322
81357285 1323static int link_append_to_master(Link *link) {
5f707e12
YW		 1324 Link *master;
1325 int r;
1326
1327 assert(link);
5f707e12 1328
81357285
YW		 1329 /* - The link may have no master.
1330 * - RTM_NEWLINK message about master interface may not be received yet. */
1331 if (link_get_master(link, &master) < 0)
1332 return 0;
5f707e12 1333
de7fef4b 1334 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1335 if (r <= 0)
5f707e12
YW		 1336 return r;
1337
1338 link_ref(link);
1339 return 0;
1340}
1341
81357285 1342static void link_drop_from_master(Link *link) {
5f707e12
YW		 1343 Link *master;
1344
1345 assert(link);
1346
81357285 1347 if (!link->manager)
5f707e12
YW		 1348 return;
1349
81357285 1350 if (link_get_master(link, &master) < 0)
5f707e12
YW		 1351 return;
1352
1353 link_unref(set_remove(master->slaves, link));
1354}
1355
56001f02
YW		 1356static void link_drop_requests(Link *link) {
1357 Request *req;
1358
1359 assert(link);
1360 assert(link->manager);
1361
1362 ORDERED_SET_FOREACH(req, link->manager->request_queue)
1363 if (req->link == link)
1364 request_drop(req);
1365}
1366
cc2d7efc
YW		 1367
1368static Link *link_drop(Link *link) {
0b54c870
YW		 1369 char **n;
1370
63130eb3 1371 if (!link)
cc2d7efc 1372 return NULL;
0d4ad91d 1373
63130eb3
YW		 1374 assert(link->manager);
1375
0d4ad91d
AR		 1376 link_set_state(link, LINK_STATE_LINGER);
1377
63130eb3
YW		 1378 /* Drop all references from other links and manager. Note that async netlink calls may have
1379 * references to the link, and they will be dropped when we receive replies. */
1380
56001f02
YW		 1381 link_drop_requests(link);
1382
0d4ad91d
AR		 1383 link_free_carrier_maps(link);
1384
81357285 1385 link_drop_from_master(link);
5f707e12 1386
63130eb3 1387 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 1388
db2f8a2e 1389 (void) unlink(link->state_file);
63130eb3
YW		 1390 link_clean(link);
1391
0b54c870
YW		 1392 STRV_FOREACH(n, link->alternative_names)
1393 hashmap_remove(link->manager->links_by_name, *n);
1394
1395 hashmap_remove(link->manager->links_by_name, link->ifname);
1396
63130eb3
YW		 1397 /* The following must be called at last. */
1398 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1399 return link_unref(link);
0d4ad91d
AR		 1400}
1401
04952b25 1402int link_activate(Link *link) {
f882c247
TG		 1403 int r;
1404
ef1ba606 1405 assert(link);
f5be5601 1406 assert(link->network);
dd3efc09 1407
61135582
DS		 1408 switch (link->network->activation_policy) {
1409 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1410 r = link_handle_bound_to_list(link);
1411 if (r < 0)
1412 return r;
61135582
DS		 1413 break;
1414 case ACTIVATION_POLICY_UP:
1415 if (link->activated)
1416 break;
1417 _fallthrough_;
1418 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1419 r = link_up(link);
04952b25 1420 if (r < 0)
505f8da7 1421 return r;
61135582
DS		 1422 break;
1423 case ACTIVATION_POLICY_DOWN:
1424 if (link->activated)
1425 break;
1426 _fallthrough_;
1427 case ACTIVATION_POLICY_ALWAYS_DOWN:
1428 r = link_down(link, NULL);
04952b25 1429 if (r < 0)
61135582 1430 return r;
61135582
DS		 1431 break;
1432 default:
1433 break;
ef1ba606 1434 }
61135582 1435 link->activated = true;
f882c247 1436
04952b25
YW		 1437 return 0;
1438}
1439
1440static int link_joined(Link *link) {
1441 int r;
1442
1443 assert(link);
1444 assert(link->network);
1445
1446 r = link_activate(link);
1447 if (r < 0)
1448 return r;
1449
97108953
YW		 1450 link_set_state(link, LINK_STATE_CONFIGURING);
1451
9ed794a3 1452 if (link->network->bridge) {
e1853b00 1453 r = link_set_bridge(link);
6a7a4e4d
LP		 1454 if (r < 0)
1455 log_link_error_errno(link, r, "Could not set bridge message: %m");
e1853b00
SS		 1456 }
1457
eb64b435 1458 if (link->network->bond) {
7fcee284 1459 r = link_set_bond(link);
eb64b435
SS		 1460 if (r < 0)
1461 log_link_error_errno(link, r, "Could not set bond message: %m");
1462 }
1463
34d7f2c9
YW		 1464 r = link_set_bridge_vlan(link);
1465 if (r < 0)
1466 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1467
81357285
YW		 1468 r = link_append_to_master(link);
1469 if (r < 0)
1470 return log_link_error_errno(link, r, "Failed to add to master interface's slave list: %m");
1471
97108953 1472 r = link_request_static_configs(link);
0e569a43
YW		 1473 if (r < 0)
1474 return r;
1475
97108953
YW		 1476 if (!link_has_carrier(link))
1477 return 0;
1478
8566df79 1479 return link_acquire_dynamic_conf(link);
02b59d57
TG		 1480}
1481
302a796f 1482static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1483 int r;
1484
1746cf2a 1485 assert(link);
ef1ba606 1486 assert(link->network);
34bf3c00 1487 assert(link->enslaving > 0);
02b59d57 1488
313cefa1 1489 link->enslaving--;
52433f6b 1490
5da8149f 1491 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1492 return 1;
1493
1c4baffc 1494 r = sd_netlink_message_get_errno(m);
856f962c 1495 if (r < 0 && r != -EEXIST) {
5ecb131d 1496 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1497 link_enter_failed(link);
1498 return 1;
4ff296b0
YW		 1499 }
1500
1501 log_link_debug(link, "Joined netdev");
02b59d57 1502
34bf3c00 1503 if (link->enslaving == 0) {
4ff296b0
YW		 1504 r = link_joined(link);
1505 if (r < 0)
1506 link_enter_failed(link);
34bf3c00 1507 }
02b59d57
TG		 1508
1509 return 1;
1510}
1511
0fa8ee6c 1512int link_enter_join_netdev(Link *link) {
6a0a2f86 1513 NetDev *netdev;
0fa8ee6c 1514 Request req;
02b59d57
TG		 1515 int r;
1516
1517 assert(link);
1518 assert(link->network);
bd08ce56 1519 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1520
0fa8ee6c
YW		 1521 req = (Request) {
1522 .link = link,
1523 .type = REQUEST_TYPE_SET_LINK,
1524 .set_link_operation = SET_LINK_MTU,
1525 };
1526
1527 if (ordered_set_contains(link->manager->request_queue, &req)) {
1528 link->entering_to_join_netdev = true;
1529 return 0;
1530 }
1531
1532 link->entering_to_join_netdev = false;
1533
289e6774 1534 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1535
34bf3c00 1536 link->enslaving = 0;
02b59d57 1537
d9c67ea1 1538 if (link->network->bond) {
cbff7170
TJ		 1539 if (link->network->bond->state == NETDEV_STATE_READY &&
1540 link->network->bond->ifindex == link->master_ifindex)
1541 return link_joined(link);
1542
f2341e0a
LP		 1543 log_struct(LOG_DEBUG,
1544 LOG_LINK_INTERFACE(link),
1545 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1546 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1547
34bf3c00
YW		 1548 link->enslaving++;
1549
f2341e0a 1550 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1551 if (r < 0) {
f2341e0a
LP		 1552 log_struct_errno(LOG_WARNING, r,
1553 LOG_LINK_INTERFACE(link),
1554 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1555 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1556 link_enter_failed(link);
1557 return r;
c0267a59
AW		 1558 }
1559 }
1560
1561 if (link->network->batadv) {
1562 log_struct(LOG_DEBUG,
1563 LOG_LINK_INTERFACE(link),
1564 LOG_NETDEV_INTERFACE(link->network->batadv),
1565 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1566
1567 link->enslaving++;
1568
1569 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1570 if (r < 0) {
1571 log_struct_errno(LOG_WARNING, r,
1572 LOG_LINK_INTERFACE(link),
1573 LOG_NETDEV_INTERFACE(link->network->batadv),
1574 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1575 link_enter_failed(link);
1576 return r;
52433f6b 1577 }
0ad6148e
MO		 1578 }
1579
d9c67ea1 1580 if (link->network->bridge) {
f2341e0a
LP		 1581 log_struct(LOG_DEBUG,
1582 LOG_LINK_INTERFACE(link),
1583 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1584 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1585
34bf3c00
YW		 1586 link->enslaving++;
1587
f2341e0a 1588 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1589 if (r < 0) {
f2341e0a
LP		 1590 log_struct_errno(LOG_WARNING, r,
1591 LOG_LINK_INTERFACE(link),
1592 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1593 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1594 link_enter_failed(link);
1595 return r;
1596 }
52433f6b
TG		 1597 }
1598
6cb955c6
AR		 1599 if (link->network->vrf) {
1600 log_struct(LOG_DEBUG,
1601 LOG_LINK_INTERFACE(link),
1602 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1603 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1604
34bf3c00
YW		 1605 link->enslaving++;
1606
6cb955c6
AR		 1607 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1608 if (r < 0) {
1609 log_struct_errno(LOG_WARNING, r,
1610 LOG_LINK_INTERFACE(link),
1611 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1612 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1613 link_enter_failed(link);
1614 return r;
1615 }
6cb955c6
AR		 1616 }
1617
90e74a66 1618 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1619
2b6db913
YW		 1620 if (netdev->ifindex > 0)
1621 /* Assume already enslaved. */
a63e5daa 1622 continue;
a63e5daa 1623
7033af49
YW		 1624 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1625 continue;
1626
f2341e0a
LP		 1627 log_struct(LOG_DEBUG,
1628 LOG_LINK_INTERFACE(link),
1629 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1630 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 1631
34bf3c00
YW		 1632 link->enslaving++;
1633
f2341e0a 1634 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 1635 if (r < 0) {
f2341e0a
LP		 1636 log_struct_errno(LOG_WARNING, r,
1637 LOG_LINK_INTERFACE(link),
1638 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1639 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 1640 link_enter_failed(link);
1641 return r;
1642 }
326cb406
SS		 1643 }
1644
34bf3c00
YW		 1645 if (link->enslaving == 0)
1646 return link_joined(link);
1647
ef1ba606
TG		 1648 return 0;
1649}
1650
5e5b137a 1651static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 1652 int k, r;
1653
1654 assert(link);
1655 assert(link->manager);
5e5b137a 1656
e36d601c 1657 r = link_drop_foreign_routes(link);
5e5b137a 1658
e36d601c 1659 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 1660 if (k < 0 && r >= 0)
1661 r = k;
1662
e36d601c 1663 k = link_drop_foreign_addresses(link);
0b81225e
YW		 1664 if (k < 0 && r >= 0)
1665 r = k;
d1bdafd2 1666
e36d601c 1667 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 1668 if (k < 0 && r >= 0)
1669 r = k;
1670
0b81225e
YW		 1671 k = manager_drop_foreign_routing_policy_rules(link->manager);
1672 if (k < 0 && r >= 0)
1673 r = k;
1674
1675 return r;
5e5b137a
TG		 1676}
1677
3104883d 1678static int link_drop_config(Link *link) {
0b81225e
YW		 1679 int k, r;
1680
1681 assert(link);
1682 assert(link->manager);
3104883d 1683
e36d601c 1684 r = link_drop_routes(link);
3104883d 1685
e36d601c 1686 k = link_drop_nexthops(link);
0b81225e
YW		 1687 if (k < 0 && r >= 0)
1688 r = k;
d1bdafd2 1689
e36d601c 1690 k = link_drop_addresses(link);
0b81225e
YW		 1691 if (k < 0 && r >= 0)
1692 r = k;
1693
e36d601c 1694 k = link_drop_neighbors(link);
25b82b6e
YW		 1695 if (k < 0 && r >= 0)
1696 r = k;
1697
0b81225e
YW		 1698 k = manager_drop_routing_policy_rules(link->manager, link);
1699 if (k < 0 && r >= 0)
1700 r = k;
3104883d 1701
c69305ff
LP		 1702 ndisc_flush(link);
1703
0b81225e 1704 return r;
3104883d
SS		 1705}
1706
c3b94251 1707static int link_configure(Link *link) {
4ecdcb07
YW		 1708 int r;
1709
ef1ba606 1710 assert(link);
b22d8a00 1711 assert(link->network);
bd08ce56 1712 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1713
34658df2 1714 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1715 if (r < 0)
1716 return r;
1717
518cd6b5
SS		 1718 r = link_configure_sr_iov(link);
1719 if (r < 0)
1720 return r;
1721
500b96eb 1722 if (link->iftype == ARPHRD_CAN)
600b7898 1723 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 1724 return link_configure_can(link);
92c918b0 1725
5e0534f1 1726 r = link_set_sysctl(link);
b69c3180
SS		 1727 if (r < 0)
1728 return r;
8749cbcd 1729
a8e5e27c 1730 r = link_request_to_set_mac(link);
e16e4b3b
DS		 1731 if (r < 0)
1732 return r;
1733
1734 r = link_set_nomaster(link);
1735 if (r < 0)
1736 return r;
1737
93fabc10 1738 r = link_request_to_set_flags(link);
99d2baa2
SS		 1739 if (r < 0)
1740 return r;
1741
cc4c8fb1 1742 r = link_request_to_set_group(link);
89fe6535
SS		 1743 if (r < 0)
1744 return r;
1745
2ffd6d73
YW		 1746 r = ipv4ll_configure(link);
1747 if (r < 0)
1748 return r;
64b21ece 1749
2ffd6d73
YW		 1750 r = dhcp4_configure(link);
1751 if (r < 0)
1752 return r;
eb34d4af 1753
2ffd6d73
YW		 1754 r = dhcp6_configure(link);
1755 if (r < 0)
1756 return r;
f5a8c43f 1757
2ffd6d73
YW		 1758 r = ndisc_configure(link);
1759 if (r < 0)
1760 return r;
4138fb2c 1761
1d28a3cf
YW		 1762 r = link_request_dhcp_server(link);
1763 if (r < 0)
1764 return r;
1765
086b8853
YW		 1766 r = radv_configure(link);
1767 if (r < 0)
1768 return r;
7465dd22 1769
2ffd6d73
YW		 1770 r = link_lldp_rx_configure(link);
1771 if (r < 0)
1772 return r;
ce43e484 1773
f6fcc1c2 1774 r = link_configure_mtu(link);
40288ece
YW		 1775 if (r < 0)
1776 return r;
44b598a1 1777
8e00e24c 1778 r = link_request_to_set_addrgen_mode(link);
9f6e82e6
YW		 1779 if (r < 0)
1780 return r;
0e2fdb83 1781
4c649652
DS		 1782 /* Drop foreign config, but ignore loopback or critical devices.
1783 * We do not want to remove loopback address or addresses used for root NFS. */
1784 if (!(link->flags & IFF_LOOPBACK) &&
1785 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
1786 r = link_drop_foreign_config(link);
1787 if (r < 0)
1788 return r;
1789 }
1790
3f265037 1791 return link_enter_join_netdev(link);
505f8da7
TG		 1792}
1793
170e88c8
YW		 1794static int link_get_network(Link *link, Network **ret) {
1795 Network *network;
1a3caa49 1796 int r;
170e88c8
YW		 1797
1798 assert(link);
1799 assert(link->manager);
1800 assert(ret);
1801
1802 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1803 bool warn = false;
1804
1a3caa49 1805 r = net_match_config(
170e88c8
YW		 1806 &network->match,
1807 link->sd_device,
1808 &link->hw_addr.addr.ether,
1809 &link->permanent_mac,
1810 link->driver,
1811 link->iftype,
1812 link->ifname,
1813 link->alternative_names,
1814 link->wlan_iftype,
1815 link->ssid,
1a3caa49
YW		 1816 &link->bssid);
1817 if (r < 0)
1818 return r;
1819 if (r == 0)
170e88c8
YW		 1820 continue;
1821
1822 if (network->match.ifname && link->sd_device) {
1823 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1824 const char *attr;
1825
1826 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1827 (void) safe_atou8(attr, &name_assign_type);
1828
1829 warn = name_assign_type == NET_NAME_ENUM;
1830 }
1831
1832 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1833 "found matching network '%s'%s.",
1834 network->filename,
1835 warn ? ", based on potentially unpredictable interface name" : "");
1836
1837 if (network->unmanaged)
1838 return -ENOENT;
1839
1840 *ret = network;
1841 return 0;
1842 }
1843
1844 return -ENOENT;
1845}
1846
0b54c870
YW		 1847static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
1848 _cleanup_strv_free_ char **altnames = NULL;
1849 char **n;
1850 int r;
1851
1852 assert(link);
1853 assert(message);
1854
1855 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
1856 if (r < 0 && r != -ENODATA)
1857 return r;
1858
1859 STRV_FOREACH(n, link->alternative_names)
1860 hashmap_remove(link->manager->links_by_name, *n);
1861
1862 strv_free_and_replace(link->alternative_names, altnames);
1863
1864 STRV_FOREACH(n, link->alternative_names) {
1865 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
1866 if (r < 0)
1867 return r;
1868 }
1869
1870 return 0;
1871}
1872
572b21d9 1873static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 1874 Network *network;
1875 int r;
1876
8bceafa7 1877 assert(m);
572b21d9 1878
8bceafa7
YW		 1879 r = sd_netlink_message_get_errno(m);
1880 if (r < 0)
1881 return r;
572b21d9 1882
0b54c870
YW		 1883 r = link_update_alternative_names(link, m);
1884 if (r < 0)
8bceafa7 1885 return r;
572b21d9 1886
170e88c8 1887 r = link_get_network(link, &network);
ad932b15
YW		 1888 if (r == -ENOENT) {
1889 link_enter_unmanaged(link);
1890 return 0;
170e88c8
YW		 1891 }
1892 if (r < 0)
ad932b15
YW		 1893 return r;
1894
99b8517c 1895 if (link->network == network && !force)
ad932b15
YW		 1896 return 0;
1897
1898 log_link_info(link, "Re-configuring with %s", network->filename);
1899
1900 /* Dropping old .network file */
2a99eed0 1901 r = link_stop_engines(link, false);
572b21d9 1902 if (r < 0)
ad932b15 1903 return r;
ad932b15 1904
19d9a5ad
YW		 1905 link_drop_requests(link);
1906
ad932b15
YW		 1907 r = link_drop_config(link);
1908 if (r < 0)
1909 return r;
1910
2c7b826d 1911 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 1912 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 1913 r = link_drop_foreign_config(link);
1914 if (r < 0)
1915 return r;
1916 }
1917
1918 link_free_carrier_maps(link);
1919 link_free_engines(link);
1920 link->network = network_unref(link->network);
59c31eba 1921 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 1922
1923 /* Then, apply new .network file */
9092113d
YW		 1924 link->network = network_ref(network);
1925 link_dirty(link);
ad932b15
YW		 1926
1927 r = link_new_carrier_maps(link);
1928 if (r < 0)
1929 return r;
1930
1931 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1932 link->activated = false;
ad932b15 1933
ad932b15
YW		 1934 r = link_configure(link);
1935 if (r < 0)
1936 return r;
1937
1938 return 0;
1939}
1940
572b21d9
YW		 1941static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1942 int r;
1943
1944 r = link_reconfigure_internal(link, m, false);
1945 if (r < 0)
1946 link_enter_failed(link);
1947
1948 return 1;
1949}
1950
1951static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1952 int r;
1953
1954 r = link_reconfigure_internal(link, m, true);
1955 if (r < 0)
1956 link_enter_failed(link);
1957
1958 return 1;
1959}
1960
1961int link_reconfigure(Link *link, bool force) {
1962 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1963 int r;
1964
8bceafa7 1965 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1966 * the function from being called multiple times simultaneously, refuse to reconfigure the
1967 * interface in these cases. */
8bceafa7 1968 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1969 return 0; /* 0 means no-op. */
2c0d7ed3 1970
572b21d9
YW		 1971 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
1972 link->ifindex);
1973 if (r < 0)
1974 return r;
1975
1976 r = netlink_call_async(link->manager->rtnl, NULL, req,
1977 force ? link_force_reconfigure_handler : link_reconfigure_handler,
1978 link_netlink_destroy_callback, link);
1979 if (r < 0)
1980 return r;
1981
1982 link_ref(link);
1983
8bceafa7 1984 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1985}
1986
e6bf7774 1987static int link_initialized_and_synced(Link *link) {
505f8da7 1988 Network *network;
505f8da7
TG		 1989 int r;
1990
1991 assert(link);
1992 assert(link->ifname);
1993 assert(link->manager);
1994
bd08ce56
YW		 1995 /* We may get called either from the asynchronous netlink callback,
1996 * or directly for link_add() if running in a container. See link_add(). */
1997 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 1998 return 0;
505f8da7 1999
6a7a4e4d 2000 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2001 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2002
0d4ad91d
AR		 2003 r = link_new_bound_by_list(link);
2004 if (r < 0)
2005 return r;
2006
2007 r = link_handle_bound_by_list(link);
2008 if (r < 0)
2009 return r;
2010
c4a03a56 2011 if (!link->network) {
0894cfe4 2012 r = wifi_get_info(link);
8d968fdd
YW		 2013 if (r < 0)
2014 return r;
2015
170e88c8 2016 r = link_get_network(link, &network);
c4a03a56
TG		 2017 if (r == -ENOENT) {
2018 link_enter_unmanaged(link);
4232cf04 2019 return 0;
170e88c8
YW		 2020 }
2021 if (r < 0)
c4a03a56 2022 return r;
505f8da7 2023
c4a03a56
TG		 2024 if (link->flags & IFF_LOOPBACK) {
2025 if (network->link_local != ADDRESS_FAMILY_NO)
2026 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2027
c4a03a56
TG		 2028 if (network->dhcp != ADDRESS_FAMILY_NO)
2029 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2030
c4a03a56
TG		 2031 if (network->dhcp_server)
2032 log_link_debug(link, "Ignoring DHCP server for loopback link");
2033 }
bd2efe92 2034
9092113d 2035 link->network = network_ref(network);
bcdcc596 2036 link_update_operstate(link, false);
9092113d 2037 link_dirty(link);
c4a03a56 2038 }
505f8da7 2039
0d4ad91d
AR		 2040 r = link_new_bound_to_list(link);
2041 if (r < 0)
2042 return r;
2043
a748b692
TG		 2044 r = link_configure(link);
2045 if (r < 0)
2046 return r;
2047
4232cf04 2048 return 0;
505f8da7
TG		 2049}
2050
302a796f 2051static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2052 int r;
2053
572b21d9
YW		 2054 r = sd_netlink_message_get_errno(m);
2055 if (r < 0) {
40681e5c 2056 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2057 link_enter_failed(link);
2058 return 0;
2059 }
2060
0b54c870
YW		 2061 r = link_update_alternative_names(link, m);
2062 if (r < 0) {
572b21d9 2063 link_enter_failed(link);
0b54c870 2064 return r;
572b21d9
YW		 2065 }
2066
4ff296b0
YW		 2067 r = link_initialized_and_synced(link);
2068 if (r < 0)
2069 link_enter_failed(link);
e6bf7774
YW		 2070 return 1;
2071}
2072
3be9d62a 2073static int link_initialized(Link *link, sd_device *device) {
4afd3348 2074 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2075 int r;
2076
2077 assert(link);
2078 assert(link->manager);
2079 assert(link->manager->rtnl);
2080 assert(device);
2081
8434fd5c 2082 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2083 return 0;
2084
51517f9e 2085 if (link->sd_device)
679b3605
TG		 2086 return 0;
2087
79008bdd 2088 log_link_debug(link, "udev initialized link");
bd08ce56 2089 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2090
51517f9e 2091 link->sd_device = sd_device_ref(device);
4f561e8e 2092
3c9b8860
TG		 2093 /* udev has initialized the link, but we don't know if we have yet
2094 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2095 * when it returns we know that the pending NEWLINKs have already been
2096 * processed and that we are up-to-date */
4f561e8e 2097
3c9b8860
TG		 2098 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2099 link->ifindex);
4f561e8e
TG		 2100 if (r < 0)
2101 return r;
2102
302a796f
YW		 2103 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2104 link_netlink_destroy_callback, link);
4f561e8e
TG		 2105 if (r < 0)
2106 return r;
2107
5da8149f
TG		 2108 link_ref(link);
2109
4f561e8e
TG		 2110 return 0;
2111}
2112
cc2d7efc
YW		 2113static Link *link_drop_or_unref(Link *link) {
2114 if (!link)
2115 return NULL;
2116 if (!link->manager)
2117 return link_unref(link);
2118 return link_drop(link);
2119}
2120
2121DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2122
2123static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2124 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2125 _cleanup_free_ char *ifname = NULL, *kind = NULL;
2126 unsigned short iftype;
2127 int r, ifindex;
2128 uint16_t type;
2129
2130 assert(manager);
2131 assert(message);
2132 assert(ret);
2133
2134 r = sd_netlink_message_get_type(message, &type);
2135 if (r < 0)
2136 return r;
2137 else if (type != RTM_NEWLINK)
2138 return -EINVAL;
2139
2140 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2141 if (r < 0)
2142 return r;
2143 else if (ifindex <= 0)
2144 return -EINVAL;
2145
2146 r = sd_rtnl_message_link_get_type(message, &iftype);
2147 if (r < 0)
2148 return r;
2149
2150 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2151 if (r < 0)
2152 return r;
2153
2154 /* check for link kind */
2155 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2156 if (r >= 0) {
2157 (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2158 r = sd_netlink_message_exit_container(message);
2159 if (r < 0)
2160 return r;
2161 }
2162
2163 link = new(Link, 1);
2164 if (!link)
2165 return -ENOMEM;
2166
2167 *link = (Link) {
2168 .n_ref = 1,
2169 .state = LINK_STATE_PENDING,
bcdcc596 2170 .online_state = _LINK_ONLINE_STATE_INVALID,
cc2d7efc
YW		 2171 .ifindex = ifindex,
2172 .iftype = iftype,
2173 .ifname = TAKE_PTR(ifname),
2174 .kind = TAKE_PTR(kind),
2175
2176 .n_dns = UINT_MAX,
2177 .dns_default_route = -1,
2178 .llmnr = _RESOLVE_SUPPORT_INVALID,
2179 .mdns = _RESOLVE_SUPPORT_INVALID,
2180 .dnssec_mode = _DNSSEC_MODE_INVALID,
2181 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2182 };
2183
2184 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
2185 if (r < 0)
2186 return r;
2187
2188 link->manager = manager;
2189
2190 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex);
2191 if (r < 0)
2192 log_link_debug_errno(link, r, "New device has no master, continuing without");
2193
2194 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
2195 if (r < 0)
2196 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
2197
2198 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2199 if (r < 0)
2200 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
2201
2202 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2203 if (r < 0)
2204 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2205
2206 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2207 if (r < 0)
2208 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2209
cc2d7efc
YW		 2210 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
2211 return -ENOMEM;
2212
2213 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
2214 return -ENOMEM;
2215
2216 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
2217 return -ENOMEM;
2218
0b54c870
YW		 2219 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2220 if (r < 0)
2221 return r;
2222
2223 r = link_update_alternative_names(link, message);
2224 if (r < 0)
2225 return r;
2226
cc2d7efc
YW		 2227 r = link_update_flags(link, message, false);
2228 if (r < 0)
2229 return r;
2230
2231 *ret = TAKE_PTR(link);
2232
2233 return 0;
2234}
2235
3be9d62a 2236static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2237 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2238 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2239 Link *link;
5a937ea2 2240 int r;
505f8da7
TG		 2241
2242 assert(m);
fbbeb65a 2243 assert(m->rtnl);
505f8da7
TG		 2244 assert(message);
2245 assert(ret);
2246
2247 r = link_new(m, message, ret);
2248 if (r < 0)
2249 return r;
2250
2251 link = *ret;
2252
6a7a4e4d 2253 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2254
bf331d87
YW		 2255 if (path_is_read_only_fs("/sys") <= 0) {
2256 /* udev should be around */
ae06ab10 2257 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2258 r = sd_device_new_from_device_id(&device, ifindex_str);
2259 if (r < 0) {
83e7c37b 2260 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2261 return 0;
5c416fc4 2262 }
505f8da7 2263
5a937ea2 2264 r = sd_device_get_is_initialized(device);
51517f9e 2265 if (r < 0) {
bf331d87 2266 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2267 goto failed;
2268 }
5a937ea2 2269 if (r == 0) {
505f8da7 2270 /* not yet ready */
79008bdd 2271 log_link_debug(link, "link pending udev initialization...");
505f8da7 2272 return 0;
3c4cb064 2273 }
505f8da7 2274
299ad32d
YW		 2275 r = device_is_renaming(device);
2276 if (r < 0) {
bf331d87 2277 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2278 goto failed;
2279 }
2280 if (r > 0) {
bf331d87 2281 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2282 return 0;
2283 }
2284
4f561e8e
TG		 2285 r = link_initialized(link, device);
2286 if (r < 0)
5c416fc4 2287 goto failed;
4f561e8e 2288 } else {
e6bf7774 2289 r = link_initialized_and_synced(link);
4f561e8e 2290 if (r < 0)
5c416fc4 2291 goto failed;
4f561e8e 2292 }
505f8da7 2293
a748b692 2294 return 0;
5c416fc4
TG		 2295failed:
2296 link_enter_failed(link);
2297 return r;
a748b692
TG		 2298}
2299
c601ebf7 2300int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2301 int r;
2302
2303 assert(link);
2304
2305 log_link_info(link, "Gained IPv6LL");
2306
c601ebf7 2307 link->ipv6ll_address = *address;
e7ab854c
TG		 2308 link_check_ready(link);
2309
b9ea3d2e 2310 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2311 r = link_acquire_dynamic_ipv6_conf(link);
e7ab854c
TG		 2312 if (r < 0) {
2313 link_enter_failed(link);
2314 return r;
2315 }
2316 }
2317
2318 return 0;
2319}
2320
3be9d62a
YW		 2321int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2322 sd_device_action_t action;
2323 Manager *m = userdata;
2324 Link *link = NULL;
2325 int r, ifindex;
2326
2327 assert(m);
2328 assert(device);
2329
2330 r = sd_device_get_action(device, &action);
2331 if (r < 0) {
2332 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2333 return 0;
2334 }
2335
2336 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2337 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2338 * still exists — and we are interested in that. */
2339 if (action == SD_DEVICE_REMOVE)
2340 return 0;
2341
2342 r = sd_device_get_ifindex(device, &ifindex);
2343 if (r < 0) {
2344 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2345 device_action_to_string(action));
2346 return 0;
2347 }
2348
2349 r = device_is_renaming(device);
2350 if (r < 0) {
2351 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2352 device_action_to_string(action));
2353 return 0;
2354 }
2355 if (r > 0) {
2356 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2357 return 0;
2358 }
2359
2360 r = link_get(m, ifindex, &link);
2361 if (r < 0) {
2362 if (r != -ENODEV)
2363 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2364 return 0;
2365 }
2366
2367 (void) link_initialized(link, device);
2368
2369 return 0;
2370}
2371
9c0a72f9
TG		 2372static int link_carrier_gained(Link *link) {
2373 int r;
2374
2375 assert(link);
2376
600b7898
YW		 2377 if (link->iftype == ARPHRD_CAN)
2378 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2379 return link_handle_bound_by_list(link);
2380
0894cfe4 2381 r = wifi_get_info(link);
8d968fdd
YW		 2382 if (r < 0)
2383 return r;
2384 if (r > 0) {
8bceafa7 2385 r = link_reconfigure(link, false);
f0269653 2386 if (r < 0)
8d968fdd
YW		 2387 return r;
2388 }
2389
b9ea3d2e 2390 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 2391 r = link_acquire_dynamic_conf(link);
f0269653 2392 if (r < 0)
9c0a72f9 2393 return r;
6fc25497 2394
97108953 2395 r = link_request_static_configs(link);
6fc25497
SS		 2396 if (r < 0)
2397 return r;
9c0a72f9
TG		 2398 }
2399
9a038aac 2400 return link_handle_bound_by_list(link);
9c0a72f9
TG		 2401}
2402
2403static int link_carrier_lost(Link *link) {
2404 int r;
2405
2406 assert(link);
2407
25e992ba 2408 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2409 return 0;
2410
600b7898
YW		 2411 if (link->iftype == ARPHRD_CAN)
2412 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2413 return link_handle_bound_by_list(link);
2414
2a99eed0 2415 r = link_stop_engines(link, false);
9c0a72f9
TG		 2416 if (r < 0) {
2417 link_enter_failed(link);
2418 return r;
2419 }
2420
19d9a5ad
YW		 2421 link_drop_requests(link);
2422
3104883d
SS		 2423 r = link_drop_config(link);
2424 if (r < 0)
2425 return r;
2426
2c7b826d 2427 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2428 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2429 r = link_drop_foreign_config(link);
2430 if (r < 0)
2431 return r;
2432 }
3104883d 2433
0d4ad91d
AR		 2434 r = link_handle_bound_by_list(link);
2435 if (r < 0)
2436 return r;
2437
9c0a72f9
TG		 2438 return 0;
2439}
2440
2441int link_carrier_reset(Link *link) {
2442 int r;
2443
2444 assert(link);
2445
2446 if (link_has_carrier(link)) {
2447 r = link_carrier_lost(link);
2448 if (r < 0)
2449 return r;
2450
2451 r = link_carrier_gained(link);
2452 if (r < 0)
2453 return r;
2454
6a7a4e4d 2455 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2456 }
2457
2458 return 0;
2459}
2460
d236718c
DS		 2461static int link_admin_state_up(Link *link) {
2462 int r;
2463
61135582
DS		 2464 assert(link);
2465
3be9d62a
YW		 2466 /* This is called every time an interface admin state changes to up;
2467 * specifically, when IFF_UP flag changes from unset to set. */
2468
61135582
DS		 2469 if (!link->network)
2470 return 0;
2471
2472 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2473 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2474 return link_down(link, NULL);
2475 }
2476
d236718c 2477 /* We set the ipv6 mtu after the device mtu, but the kernel resets
fa283812
YW		 2478 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
2479 r = link_set_ipv6_mtu(link);
2480 if (r < 0)
2481 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
d236718c
DS		 2482
2483 return 0;
2484}
2485
61135582 2486static int link_admin_state_down(Link *link) {
61135582
DS		 2487 assert(link);
2488
2489 if (!link->network)
2490 return 0;
2491
2492 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2493 if (streq_ptr(link->kind, "can") && !link->can_configured)
2494 /* CAN device needs to be down on configure. */
2495 return 0;
2496
61135582
DS		 2497 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2498 return link_up(link);
2499 }
2500
2501 return 0;
2502}
2503
3be9d62a 2504static int link_update(Link *link, sd_netlink_message *m) {
b8162cd2 2505 hw_addr_data hw_addr;
ca4e095a 2506 const char *ifname;
afe7fd56 2507 uint32_t mtu;
d236718c 2508 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2509 int old_master, r;
22936833 2510
dd3efc09 2511 assert(link);
b8941f74 2512 assert(link->ifname);
22936833
TG		 2513 assert(m);
2514
7619683b 2515 if (link->state == LINK_STATE_LINGER) {
5238e957 2516 log_link_info(link, "Link re-added");
289e6774 2517 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2518
2519 r = link_new_carrier_maps(link);
2520 if (r < 0)
2521 return r;
7619683b
TG		 2522 }
2523
1c4baffc 2524 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2525 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2526 Manager *manager = link->manager;
b8941f74 2527
30de2b89 2528 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2529
30de2b89
YW		 2530 link_drop(link);
2531 r = link_add(manager, m, &link);
2532 if (r < 0)
2533 return r;
0b54c870
YW		 2534 } else {
2535 r = link_update_alternative_names(link, m);
2536 if (r < 0)
2537 return r;
b8941f74
TG		 2538 }
2539
1c4baffc 2540 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2541 if (r >= 0 && mtu > 0) {
2542 link->mtu = mtu;
4e964aa0 2543 if (link->original_mtu == 0) {
afe7fd56 2544 link->original_mtu = mtu;
6a7a4e4d 2545 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2546 }
2547
2548 if (link->dhcp_client) {
3c9b8860
TG		 2549 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2550 link->mtu);
fc95c359
YW		 2551 if (r < 0)
2552 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2553 }
7465dd22
PF		 2554
2555 if (link->radv) {
2556 r = sd_radv_set_mtu(link->radv, link->mtu);
2557 if (r < 0)
2558 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2559 }
9842de0d 2560 }
69629de9 2561
e9189a1f
TG		 2562 /* The kernel may broadcast NEWLINK messages without the MAC address
2563 set, simply ignore them. */
b8162cd2
TR		 2564 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2565 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2566 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2567
b8162cd2 2568 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2569
b8162cd2 2570 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2571
a3adb4a6
YW		 2572 r = ipv4ll_update_mac(link);
2573 if (r < 0)
2574 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2575
d947f7f9
YW		 2576 r = dhcp4_update_mac(link);
2577 if (r < 0)
2578 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2579
eebba6dc
YW		 2580 r = dhcp6_update_mac(link);
2581 if (r < 0)
2582 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2583
d0c4275c 2584 r = radv_update_mac(link);
be9363cc
YW		 2585 if (r < 0)
2586 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2587
2588 if (link->ndisc) {
b8162cd2 2589 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2590 if (r < 0)
2591 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2592 }
d93d655c 2593
dfc58b47
YW		 2594 if (link->lldp) {
2595 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
2596 if (r < 0)
2597 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
2598 }
2599
d93d655c
YW		 2600 r = ipv4_dad_update_mac(link);
2601 if (r < 0)
2602 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2603 }
2604
bb262ef0
YW		 2605 old_master = link->master_ifindex;
2606 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2607
d236718c 2608 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2609 had_carrier = link_has_carrier(link);
2610
bb262ef0 2611 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2612 if (r < 0)
2613 return r;
2614
d236718c
DS		 2615 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2616 log_link_info(link, "Link UP");
2617
2618 r = link_admin_state_up(link);
2619 if (r < 0)
2620 return r;
61135582 2621 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2622 log_link_info(link, "Link DOWN");
2623
61135582
DS		 2624 r = link_admin_state_down(link);
2625 if (r < 0)
2626 return r;
2627 }
2628
273eec24
LP		 2629 r = link_update_lldp(link);
2630 if (r < 0)
2631 return r;
2632
a61bb41c
TG		 2633 carrier_gained = !had_carrier && link_has_carrier(link);
2634 carrier_lost = had_carrier && !link_has_carrier(link);
2635
2636 if (carrier_gained) {
6a7a4e4d 2637 log_link_info(link, "Gained carrier");
a61bb41c 2638
9c0a72f9
TG		 2639 r = link_carrier_gained(link);
2640 if (r < 0)
2641 return r;
a61bb41c 2642 } else if (carrier_lost) {
6a7a4e4d 2643 log_link_info(link, "Lost carrier");
a61bb41c 2644
9c0a72f9
TG		 2645 r = link_carrier_lost(link);
2646 if (r < 0)
a61bb41c 2647 return r;
a61bb41c
TG		 2648 }
2649
2650 return 0;
dd3efc09 2651}
fe8db0c5 2652
3be9d62a
YW		 2653int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2654 Link *link = NULL;
2655 NetDev *netdev = NULL;
2656 uint16_t type;
2657 const char *name;
2658 int r, ifindex;
2659
2660 assert(rtnl);
2661 assert(message);
2662 assert(m);
2663
2664 if (sd_netlink_message_is_error(message)) {
2665 r = sd_netlink_message_get_errno(message);
2666 if (r < 0)
2667 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2668
2669 return 0;
2670 }
2671
2672 r = sd_netlink_message_get_type(message, &type);
2673 if (r < 0) {
2674 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2675 return 0;
2676 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2677 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2678 return 0;
2679 }
2680
2681 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2682 if (r < 0) {
2683 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2684 return 0;
2685 } else if (ifindex <= 0) {
2686 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2687 return 0;
2688 }
2689
2690 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2691 if (r < 0) {
2692 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2693 return 0;
2694 }
2695
2696 (void) link_get(m, ifindex, &link);
2697 (void) netdev_get(m, name, &netdev);
2698
2699 switch (type) {
2700 case RTM_NEWLINK:
2701 if (!link) {
2702 /* link is new, so add it */
2703 r = link_add(m, message, &link);
2704 if (r < 0) {
2705 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2706 return 0;
2707 }
2708 }
2709
2710 if (netdev) {
2711 /* netdev exists, so make sure the ifindex matches */
2712 r = netdev_set_ifindex(netdev, message);
2713 if (r < 0) {
2714 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2715 return 0;
2716 }
2717 }
2718
2719 r = link_update(link, message);
2720 if (r < 0) {
f0269653
YW		 2721 log_warning_errno(r, "Could not process link message: %m");
2722 link_enter_failed(link);
3be9d62a
YW		 2723 return 0;
2724 }
2725
2726 break;
2727
2728 case RTM_DELLINK:
2729 link_drop(link);
2730 netdev_drop(netdev);
2731
2732 break;
2733
2734 default:
2735 assert_not_reached("Received link message with invalid RTNL message type.");
2736 }
2737
2738 return 1;
2739}
2740
fe8db0c5 2741static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2742 [LINK_STATE_PENDING] = "pending",
bd08ce56 2743 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2744 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2745 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2746 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2747 [LINK_STATE_FAILED] = "failed",
370e9930 2748 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2749};
2750
2751DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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