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test-network: fix setting name
[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"
3ddcbeea 31#include "networkd-can.h"
8fcf1d61 32#include "networkd-dhcp-server.h"
ca5ad760
YW		 33#include "networkd-dhcp4.h"
34#include "networkd-dhcp6.h"
35#include "networkd-ipv4ll.h"
76c5a0f2 36#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 37#include "networkd-link-bus.h"
38#include "networkd-link.h"
8e1ad1ea 39#include "networkd-lldp-tx.h"
23f53b99 40#include "networkd-manager.h"
dbf63196 41#include "networkd-mdb.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
e5b35bf6
YW		 753 if (!link->static_bridge_fdb_configured)
754 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
755
40ca350e
YW		 756 if (!link->static_neighbors_configured)
757 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
758
d19b9939
YW		 759 if (!link->static_nexthops_configured)
760 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 761
76c5a0f2
YW		 762 if (!link->static_routes_configured)
763 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
764
0e5ef6be 765 if (!link->static_routing_policy_rules_configured)
d19b9939 766 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 767
d19b9939
YW		 768 if (!link->tc_configured)
769 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 770
d19b9939
YW		 771 if (!link->sr_iov_configured)
772 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 773
d19b9939
YW		 774 if (!link->bridge_mdb_configured)
775 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 776
463797c1 777 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 778 bool has_ndisc_address = false;
779 NDiscAddress *n;
6accfd31 780
94876904
YW		 781 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
782 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 783
90e74a66 784 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 785 if (!n->marked) {
786 has_ndisc_address = true;
787 break;
788 }
789
8cd37e43 790 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 791 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 792 !link->ipv4ll_address_configured)
793 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
794 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 795
0d0799da
YW		 796 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
797 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 798 if (!link->dhcp4_configured &&
799 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
800 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 801 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 802 !link->ipv4ll_address_configured)
803 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 804 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 805
0d0799da 806 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		 807 __func__,
808 yes_no(link->dhcp4_configured),
0d0799da 809 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 810 yes_no(link->dhcp6_address_configured),
811 yes_no(link->dhcp6_route_configured),
812 yes_no(link->dhcp6_pd_address_configured),
813 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 814 yes_no(link->ndisc_addresses_configured),
815 yes_no(link->ndisc_routes_configured));
39373cb9 816 }
463797c1 817 }
6accfd31 818
5f58af25 819 link_enter_configured(link);
6accfd31
DA		 820}
821
682c65b0 822static int link_set_static_configs(Link *link) {
f882c247
TG		 823 int r;
824
825 assert(link);
826 assert(link->network);
f5be5601 827 assert(link->state != _LINK_STATE_INVALID);
f882c247 828
1f241589
YW		 829 r = link_set_bridge_mdb(link);
830 if (r < 0)
831 return r;
832
76c5a0f2
YW		 833 r = link_set_ipv6_proxy_ndp_addresses(link);
834 if (r < 0)
835 return r;
836
0e5ef6be
YW		 837 r = link_set_address_labels(link);
838 if (r < 0)
839 return r;
840
76c5a0f2 841 r = link_request_static_addresses(link);
f3ef324d
YW		 842 if (r < 0)
843 return r;
e4a71bf3 844
e5b35bf6
YW		 845 r = link_request_static_bridge_fdb(link);
846 if (r < 0)
847 return r;
848
40ca350e 849 r = link_request_static_neighbors(link);
682c65b0
YW		 850 if (r < 0)
851 return r;
bd6379ec 852
76c5a0f2 853 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 854 if (r < 0)
855 return r;
f882c247 856
76c5a0f2
YW		 857 r = link_request_static_routes(link, false);
858 if (r < 0)
859 return r;
860
861 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 862 if (r < 0)
863 return r;
d4cdbea5 864
f882c247
TG		 865 return 0;
866}
867
3a390124 868static int link_configure_continue(Link *link);
55dc8c4a 869
e16e4b3b
DS		 870static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
871 int r;
872
873 assert(link);
874
875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
876 return 1;
877
878 r = sd_netlink_message_get_errno(m);
879 if (r < 0)
880 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
881 else
882 log_link_debug(link, "Setting MAC address done.");
883
884 return 1;
885}
886
887static int link_set_mac(Link *link) {
888 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
889 int r;
890
891 assert(link);
892 assert(link->network);
893 assert(link->manager);
894 assert(link->manager->rtnl);
895
896 if (!link->network->mac)
897 return 0;
898
899 log_link_debug(link, "Setting MAC address");
900
901 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
902 if (r < 0)
903 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
904
905 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
906 if (r < 0)
907 return log_link_error_errno(link, r, "Could not set MAC address: %m");
908
909 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
910 link_netlink_destroy_callback, link);
911 if (r < 0)
912 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
913
914 link_ref(link);
915
916 return 0;
917}
918
919static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
920 int r;
921
922 assert(link);
923
924 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
925 return 1;
926
927 r = sd_netlink_message_get_errno(m);
928 if (r < 0)
929 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
930 else
931 log_link_debug(link, "Setting nomaster done.");
932
933 return 1;
934}
935
936static int link_set_nomaster(Link *link) {
937 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
938 int r;
939
940 assert(link);
941 assert(link->network);
942 assert(link->manager);
943 assert(link->manager->rtnl);
944
945 /* set it free if not enslaved with networkd */
c0267a59 946 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 947 return 0;
948
949 log_link_debug(link, "Setting nomaster");
950
951 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
952 if (r < 0)
953 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
954
955 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
956 if (r < 0)
957 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
958
959 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
960 link_netlink_destroy_callback, link);
961 if (r < 0)
962 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
963
964 link_ref(link);
965
966 return 0;
967}
968
302a796f 969static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 970 int r;
971
972 assert(m);
973 assert(link);
974 assert(link->ifname);
975
55dc8c4a
YW		 976 link->setting_mtu = false;
977
5da8149f 978 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 979 return 1;
980
1c4baffc 981 r = sd_netlink_message_get_errno(m);
4ff296b0 982 if (r < 0)
5ecb131d 983 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 984 else
985 log_link_debug(link, "Setting MTU done.");
55dc8c4a 986
4ff296b0 987 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 988 r = link_configure_continue(link);
4ff296b0
YW		 989 if (r < 0)
990 link_enter_failed(link);
991 }
4f882b2a
TG		 992
993 return 1;
994}
995
933c70a0 996int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 997 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 998 int r;
999
1000 assert(link);
1001 assert(link->manager);
1002 assert(link->manager->rtnl);
1003
40288ece
YW		 1004 if (mtu == 0 || link->setting_mtu)
1005 return 0;
1006
933c70a0 1007 if (link->mtu == mtu)
ee493106
YW		 1008 return 0;
1009
6a7a4e4d 1010 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1011
6a7a4e4d
LP		 1012 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1013 if (r < 0)
1014 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1015
44b598a1 1016 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1017 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1018 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1019
1020 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1021 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1022
72c2500b 1023 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1024 }
1025
1c4baffc 1026 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1027 if (r < 0)
1028 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1029
302a796f
YW		 1030 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1031 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1032 if (r < 0)
1033 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1034
ae941762 1035 link_ref(link);
1046bf9b 1036 link->setting_mtu = true;
b226d99b 1037
4f882b2a
TG		 1038 return 0;
1039}
1040
f6fcc1c2
YW		 1041static bool link_reduces_vlan_mtu(Link *link) {
1042 /* See netif_reduces_vlan_mtu() in kernel. */
1043 return streq_ptr(link->kind, "macsec");
1044}
1045
1046static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1047 uint32_t mtu = 0;
1048 NetDev *dev;
f6fcc1c2 1049
90e74a66 1050 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1051 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1052 /* See vlan_dev_change_mtu() in kernel. */
1053 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1054
1055 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1056 /* See macvlan_change_mtu() in kernel. */
1057 mtu = dev->mtu;
1058
1059 return mtu;
1060}
1061
1062static int link_configure_mtu(Link *link) {
1063 uint32_t mtu;
1064
1065 assert(link);
1066 assert(link->network);
1067
1068 if (link->network->mtu > 0)
1069 return link_set_mtu(link, link->network->mtu);
1070
1071 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1072 if (link->mtu >= mtu)
1073 return 0;
1074
1075 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1076 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1077 link->mtu, mtu);
1078
1079 return link_set_mtu(link, mtu);
1080}
1081
302a796f 1082static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1083 int r;
1084
1085 assert(m);
1086 assert(link);
1087 assert(link->ifname);
1088
1089 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1090 return 1;
1091
1092 r = sd_netlink_message_get_errno(m);
1093 if (r < 0)
5ecb131d 1094 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1095
1096 return 1;
1097}
1098
1099static int link_set_flags(Link *link) {
1100 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1101 unsigned ifi_change = 0;
1102 unsigned ifi_flags = 0;
1103 int r;
1104
1105 assert(link);
1106 assert(link->manager);
1107 assert(link->manager->rtnl);
1108
1109 if (link->flags & IFF_LOOPBACK)
1110 return 0;
1111
1112 if (!link->network)
1113 return 0;
1114
937e305e
SS		 1115 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1116 link->network->promiscuous < 0)
99d2baa2
SS		 1117 return 0;
1118
1119 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1120 if (r < 0)
1121 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1122
1123 if (link->network->arp >= 0) {
1124 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1125 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1126 }
1127
1128 if (link->network->multicast >= 0) {
1129 ifi_change |= IFF_MULTICAST;
1130 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1131 }
1132
866e6b7a
SS		 1133 if (link->network->allmulticast >= 0) {
1134 ifi_change |= IFF_ALLMULTI;
1135 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1136 }
1137
937e305e
SS		 1138 if (link->network->promiscuous >= 0) {
1139 ifi_change |= IFF_PROMISC;
1140 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1141 }
1142
99d2baa2
SS		 1143 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1144 if (r < 0)
1145 return log_link_error_errno(link, r, "Could not set link flags: %m");
1146
302a796f
YW		 1147 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1148 link_netlink_destroy_callback, link);
99d2baa2
SS		 1149 if (r < 0)
1150 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1151
1152 link_ref(link);
1153
1154 return 0;
1155}
1156
e7ab854c
TG		 1157static int link_acquire_ipv6_conf(Link *link) {
1158 int r;
1159
1160 assert(link);
1161
086b8853 1162 if (link->radv) {
7465dd22 1163 assert(link->radv);
94876904 1164 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1165
1166 log_link_debug(link, "Starting IPv6 Router Advertisements");
1167
fd3ef936
YW		 1168 r = radv_emit_dns(link);
1169 if (r < 0)
1170 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1171
7465dd22
PF		 1172 r = sd_radv_start(link->radv);
1173 if (r < 0 && r != -EBUSY)
1174 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1175 }
1176
294f129b
YW		 1177 r = ndisc_start(link);
1178 if (r < 0)
1179 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 1180
294f129b
YW		 1181 r = dhcp6_start(link);
1182 if (r < 0)
1183 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 1184
1633c457
YW		 1185 r = dhcp6_request_prefix_delegation(link);
1186 if (r < 0)
1187 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1188
e7ab854c
TG		 1189 return 0;
1190}
1191
6fc25497 1192static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1193 int r;
1194
1195 assert(link);
ff254138
TG		 1196 assert(link->manager);
1197 assert(link->manager->event);
1198
0107b769 1199 if (link->dhcp_client) {
294f129b 1200 r = dhcp4_start(link);
0107b769 1201 if (r < 0)
294f129b 1202 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 1203
0b4b66cc 1204 } else if (link->ipv4ll) {
6a7a4e4d 1205 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1206
1207 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1208 if (r < 0)
1209 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1210 }
1211
ab486ef4
YW		 1212 if (link->dhcp_server) {
1213 r = sd_dhcp_server_start(link->dhcp_server);
1214 if (r < 0)
1215 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
1216 }
1217
6fc25497
SS		 1218 return 0;
1219}
1220
1221static int link_acquire_conf(Link *link) {
1222 int r;
1223
1224 assert(link);
1225
1226 r = link_acquire_ipv4_conf(link);
1227 if (r < 0)
1228 return r;
1229
94876904 1230 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1231 r = link_acquire_ipv6_conf(link);
1232 if (r < 0)
1233 return r;
1234 }
1235
2ffd6d73
YW		 1236 r = link_lldp_emit_start(link);
1237 if (r < 0)
1238 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1239
ff254138
TG		 1240 return 0;
1241}
1242
a61bb41c 1243bool link_has_carrier(Link *link) {
deb2e523
TG		 1244 /* see Documentation/networking/operstates.txt in the kernel sources */
1245
a61bb41c 1246 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1247 return true;
1248
a61bb41c 1249 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1250 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1251 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1252 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1253 return true;
1254
1255 return false;
1256}
1257
0e2fdb83
SS		 1258static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1259 int r;
1260
1261 assert(link);
1262
9524014e
DS		 1263 link->setting_genmode = false;
1264
0e2fdb83
SS		 1265 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1266 return 1;
1267
1268 r = sd_netlink_message_get_errno(m);
1269 if (r < 0)
5ecb131d 1270 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1271 else
1272 log_link_debug(link, "Setting address genmode done.");
1273
1274 if (link->state == LINK_STATE_INITIALIZED) {
1275 r = link_configure_continue(link);
1276 if (r < 0)
1277 link_enter_failed(link);
1278 }
0e2fdb83
SS		 1279
1280 return 1;
1281}
1282
1283static int link_configure_addrgen_mode(Link *link) {
1284 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1285 uint8_t ipv6ll_mode;
1286 int r;
1287
1288 assert(link);
1289 assert(link->network);
1290 assert(link->manager);
1291 assert(link->manager->rtnl);
1292
9524014e 1293 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1294 return 0;
1295
0e2fdb83
SS		 1296 log_link_debug(link, "Setting address genmode for link");
1297
1298 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1299 if (r < 0)
1300 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1301
1302 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1303 if (r < 0)
1304 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1305
1306 r = sd_netlink_message_open_container(req, AF_INET6);
1307 if (r < 0)
1308 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1309
1310 if (!link_ipv6ll_enabled(link))
1311 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1312 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1313 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1314 if (r < 0) {
1315 /* The file may not exist. And even if it exists, when stable_secret is unset,
0e275271
YW		 1316 * reading the file fails with ENOMEM when read_full_virtual_file(), which uses
1317 * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
1318 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
a6f1848a
SS		 1319
1320 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1321 } else
1322 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1323 } else
6f6296b9 1324 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1325
1326 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1327 if (r < 0)
1328 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1329
1330 r = sd_netlink_message_close_container(req);
1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1333
1334 r = sd_netlink_message_close_container(req);
1335 if (r < 0)
1336 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1337
1338 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1339 link_netlink_destroy_callback, link);
1340 if (r < 0)
1341 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1342
1343 link_ref(link);
9524014e 1344 link->setting_genmode = true;
0e2fdb83
SS		 1345
1346 return 0;
1347}
1348
302a796f 1349static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1350 int r;
1351
1746cf2a
TG		 1352 assert(link);
1353
5da8149f 1354 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1355 return 1;
1356
1c4baffc 1357 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1358 if (r < 0)
26d6b214 1359 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1360 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1361
f882c247
TG		 1362 return 1;
1363}
1364
f282ce20 1365int link_up(Link *link) {
4afd3348 1366 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1367 int r;
1368
f882c247 1369 assert(link);
c106cc36 1370 assert(link->network);
f882c247
TG		 1371 assert(link->manager);
1372 assert(link->manager->rtnl);
1373
6a7a4e4d 1374 log_link_debug(link, "Bringing link up");
449f7554 1375
6a7a4e4d
LP		 1376 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1377 if (r < 0)
1378 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1379
5d4795f3 1380 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1381 if (r < 0)
1382 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1383
302a796f
YW		 1384 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1385 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1386 if (r < 0)
1387 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1388
b226d99b
TG		 1389 link_ref(link);
1390
f882c247
TG		 1391 return 0;
1392}
1393
302a796f 1394static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1395 int r;
1396
1397 assert(link);
1398
1399 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1400 return 1;
1401
1c4baffc 1402 r = sd_netlink_message_get_errno(m);
0d4ad91d 1403 if (r < 0)
5ecb131d 1404 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1405
1406 return 1;
1407}
1408
8e54db83 1409int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1410 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1411 int r;
1412
1413 assert(link);
1414 assert(link->manager);
1415 assert(link->manager->rtnl);
1416
6a7a4e4d 1417 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1418
1419 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1420 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1421 if (r < 0)
1422 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1423
1424 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1425 if (r < 0)
1426 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1427
8e54db83
YW		 1428 r = netlink_call_async(link->manager->rtnl, NULL, req,
1429 callback ?: link_down_handler,
302a796f 1430 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1431 if (r < 0)
1432 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1433
1434 link_ref(link);
1435
1436 return 0;
1437}
1438
89fe6535
SS		 1439static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1440 int r;
1441
1442 assert(link);
1443
1444 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1445 return 1;
1446
1447 r = sd_netlink_message_get_errno(m);
1448 if (r < 0)
1449 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1450
1451 return 1;
1452}
1453
1454static int link_set_group(Link *link) {
1455 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1456 int r;
1457
1458 assert(link);
1459 assert(link->network);
1460 assert(link->manager);
1461 assert(link->manager->rtnl);
1462
f0c09831 1463 if (!link->network->group_set)
89fe6535
SS		 1464 return 0;
1465
1466 log_link_debug(link, "Setting group");
1467
1468 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1469 if (r < 0)
1470 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1471
1472 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1473 if (r < 0)
1474 return log_link_error_errno(link, r, "Could not set link group: %m");
1475
1476 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1477 link_netlink_destroy_callback, link);
1478 if (r < 0)
1479 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1480
1481 link_ref(link);
1482
1483 return 0;
1484}
1485
0d4ad91d
AR		 1486static int link_handle_bound_to_list(Link *link) {
1487 Link *l;
0d4ad91d
AR		 1488 int r;
1489 bool required_up = false;
1490 bool link_is_up = false;
1491
1492 assert(link);
1493
1494 if (hashmap_isempty(link->bound_to_links))
1495 return 0;
1496
1497 if (link->flags & IFF_UP)
1498 link_is_up = true;
1499
90e74a66 1500 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1501 if (link_has_carrier(l)) {
1502 required_up = true;
1503 break;
1504 }
1505
1506 if (!required_up && link_is_up) {
8e54db83 1507 r = link_down(link, NULL);
0d4ad91d
AR		 1508 if (r < 0)
1509 return r;
1510 } else if (required_up && !link_is_up) {
1511 r = link_up(link);
1512 if (r < 0)
1513 return r;
1514 }
1515
1516 return 0;
1517}
1518
1519static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1520 Link *l;
1521 int r;
1522
1523 assert(link);
1524
1525 if (hashmap_isempty(link->bound_by_links))
1526 return 0;
1527
90e74a66 1528 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1529 r = link_handle_bound_to_list(l);
1530 if (r < 0)
1531 return r;
1532 }
1533
1534 return 0;
1535}
1536
1537static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1538 int r;
1539
1540 assert(link);
1541 assert(carrier);
1542
1543 if (link == carrier)
1544 return 0;
1545
1546 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1547 return 0;
1548
190b3b5c 1549 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1550 if (r < 0)
1551 return r;
1552
9092113d
YW		 1553 link_dirty(link);
1554
0d4ad91d
AR		 1555 return 0;
1556}
1557
1558static int link_new_bound_by_list(Link *link) {
1559 Manager *m;
1560 Link *carrier;
0d4ad91d 1561 int r;
0d4ad91d
AR		 1562
1563 assert(link);
1564 assert(link->manager);
1565
1566 m = link->manager;
1567
90e74a66 1568 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1569 if (!carrier->network)
1570 continue;
1571
1572 if (strv_isempty(carrier->network->bind_carrier))
1573 continue;
1574
191a3f16 1575 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1576 r = link_put_carrier(link, carrier, &link->bound_by_links);
1577 if (r < 0)
1578 return r;
0d4ad91d
AR		 1579 }
1580 }
1581
90e74a66 1582 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1583 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1584 if (r < 0)
1585 return r;
0d4ad91d
AR		 1586 }
1587
1588 return 0;
1589}
1590
1591static int link_new_bound_to_list(Link *link) {
1592 Manager *m;
1593 Link *carrier;
0d4ad91d 1594 int r;
0d4ad91d
AR		 1595
1596 assert(link);
1597 assert(link->manager);
1598
1599 if (!link->network)
1600 return 0;
1601
1602 if (strv_isempty(link->network->bind_carrier))
1603 return 0;
1604
1605 m = link->manager;
1606
90e74a66 1607 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1608 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1609 r = link_put_carrier(link, carrier, &link->bound_to_links);
1610 if (r < 0)
1611 return r;
0d4ad91d
AR		 1612 }
1613 }
1614
90e74a66 1615 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1616 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1617 if (r < 0)
1618 return r;
0d4ad91d
AR		 1619 }
1620
1621 return 0;
1622}
1623
1624static int link_new_carrier_maps(Link *link) {
1625 int r;
1626
1627 r = link_new_bound_by_list(link);
1628 if (r < 0)
1629 return r;
1630
1631 r = link_handle_bound_by_list(link);
1632 if (r < 0)
1633 return r;
1634
1635 r = link_new_bound_to_list(link);
1636 if (r < 0)
1637 return r;
1638
1639 r = link_handle_bound_to_list(link);
1640 if (r < 0)
1641 return r;
1642
1643 return 0;
1644}
1645
1646static void link_free_bound_to_list(Link *link) {
9092113d 1647 bool updated = false;
0d4ad91d 1648 Link *bound_to;
0d4ad91d 1649
9092113d
YW		 1650 assert(link);
1651
1652 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1653 updated = true;
0d4ad91d
AR		 1654
1655 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1656 link_dirty(bound_to);
0d4ad91d
AR		 1657 }
1658
9092113d
YW		 1659 if (updated)
1660 link_dirty(link);
1661
0d4ad91d
AR		 1662 return;
1663}
1664
1665static void link_free_bound_by_list(Link *link) {
9092113d 1666 bool updated = false;
0d4ad91d 1667 Link *bound_by;
0d4ad91d 1668
9092113d
YW		 1669 assert(link);
1670
1671 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1672 updated = true;
0d4ad91d
AR		 1673
1674 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1675 link_dirty(bound_by);
0d4ad91d
AR		 1676 link_handle_bound_to_list(bound_by);
1677 }
1678 }
1679
9092113d
YW		 1680 if (updated)
1681 link_dirty(link);
1682
0d4ad91d
AR		 1683 return;
1684}
1685
1686static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1687 assert(link);
1688
9092113d
YW		 1689 link_free_bound_to_list(link);
1690 link_free_bound_by_list(link);
0d4ad91d
AR		 1691
1692 return;
1693}
1694
5f707e12
YW		 1695static int link_append_to_master(Link *link, NetDev *netdev) {
1696 Link *master;
1697 int r;
1698
1699 assert(link);
1700 assert(netdev);
1701
1702 r = link_get(link->manager, netdev->ifindex, &master);
1703 if (r < 0)
1704 return r;
1705
de7fef4b 1706 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1707 if (r <= 0)
5f707e12
YW		 1708 return r;
1709
1710 link_ref(link);
1711 return 0;
1712}
1713
1714static void link_drop_from_master(Link *link, NetDev *netdev) {
1715 Link *master;
1716
1717 assert(link);
1718
1719 if (!link->manager || !netdev)
1720 return;
1721
1722 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1723 return;
1724
1725 link_unref(set_remove(master->slaves, link));
1726}
1727
56001f02
YW		 1728static void link_drop_requests(Link *link) {
1729 Request *req;
1730
1731 assert(link);
1732 assert(link->manager);
1733
1734 ORDERED_SET_FOREACH(req, link->manager->request_queue)
1735 if (req->link == link)
1736 request_drop(req);
1737}
1738
cc2d7efc
YW		 1739
1740static Link *link_drop(Link *link) {
0b54c870
YW		 1741 char **n;
1742
63130eb3 1743 if (!link)
cc2d7efc 1744 return NULL;
0d4ad91d 1745
63130eb3
YW		 1746 assert(link->manager);
1747
0d4ad91d
AR		 1748 link_set_state(link, LINK_STATE_LINGER);
1749
63130eb3
YW		 1750 /* Drop all references from other links and manager. Note that async netlink calls may have
1751 * references to the link, and they will be dropped when we receive replies. */
1752
56001f02
YW		 1753 link_drop_requests(link);
1754
0d4ad91d
AR		 1755 link_free_carrier_maps(link);
1756
5f707e12 1757 if (link->network) {
c0267a59 1758 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1759 link_drop_from_master(link, link->network->bridge);
1760 link_drop_from_master(link, link->network->bond);
1761 }
1762
63130eb3 1763 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 1764
db2f8a2e 1765 (void) unlink(link->state_file);
63130eb3
YW		 1766 link_clean(link);
1767
0b54c870
YW		 1768 STRV_FOREACH(n, link->alternative_names)
1769 hashmap_remove(link->manager->links_by_name, *n);
1770
1771 hashmap_remove(link->manager->links_by_name, link->ifname);
1772
63130eb3
YW		 1773 /* The following must be called at last. */
1774 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 1775 return link_unref(link);
0d4ad91d
AR		 1776}
1777
04952b25 1778int link_activate(Link *link) {
f882c247
TG		 1779 int r;
1780
ef1ba606 1781 assert(link);
f5be5601 1782 assert(link->network);
dd3efc09 1783
61135582
DS		 1784 switch (link->network->activation_policy) {
1785 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1786 r = link_handle_bound_to_list(link);
1787 if (r < 0)
1788 return r;
61135582
DS		 1789 break;
1790 case ACTIVATION_POLICY_UP:
1791 if (link->activated)
1792 break;
1793 _fallthrough_;
1794 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1795 r = link_up(link);
04952b25 1796 if (r < 0)
505f8da7 1797 return r;
61135582
DS		 1798 break;
1799 case ACTIVATION_POLICY_DOWN:
1800 if (link->activated)
1801 break;
1802 _fallthrough_;
1803 case ACTIVATION_POLICY_ALWAYS_DOWN:
1804 r = link_down(link, NULL);
04952b25 1805 if (r < 0)
61135582 1806 return r;
61135582
DS		 1807 break;
1808 default:
1809 break;
ef1ba606 1810 }
61135582 1811 link->activated = true;
f882c247 1812
04952b25
YW		 1813 return 0;
1814}
1815
1816static int link_joined(Link *link) {
1817 int r;
1818
1819 assert(link);
1820 assert(link->network);
1821
1822 r = link_activate(link);
1823 if (r < 0)
1824 return r;
1825
9ed794a3 1826 if (link->network->bridge) {
e1853b00 1827 r = link_set_bridge(link);
6a7a4e4d
LP		 1828 if (r < 0)
1829 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1830
1831 r = link_append_to_master(link, link->network->bridge);
1832 if (r < 0)
1833 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1834 }
1835
eb64b435 1836 if (link->network->bond) {
7fcee284 1837 r = link_set_bond(link);
eb64b435
SS		 1838 if (r < 0)
1839 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1840
45e11abf 1841 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1842 if (r < 0)
1843 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1844 }
1845
34d7f2c9
YW		 1846 r = link_set_bridge_vlan(link);
1847 if (r < 0)
1848 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1849
c1835a42
RM		 1850 /* Skip setting up addresses until it gets carrier,
1851 or it would try to set addresses twice,
1852 which is bad for non-idempotent steps. */
dad2d78e 1853 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1854 return 0;
1855
b425c3ae 1856 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1857
1858 r = link_acquire_conf(link);
1859 if (r < 0)
1860 return r;
1861
682c65b0 1862 return link_set_static_configs(link);
02b59d57
TG		 1863}
1864
302a796f 1865static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1866 int r;
1867
1746cf2a 1868 assert(link);
ef1ba606 1869 assert(link->network);
34bf3c00 1870 assert(link->enslaving > 0);
02b59d57 1871
313cefa1 1872 link->enslaving--;
52433f6b 1873
5da8149f 1874 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1875 return 1;
1876
1c4baffc 1877 r = sd_netlink_message_get_errno(m);
856f962c 1878 if (r < 0 && r != -EEXIST) {
5ecb131d 1879 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1880 link_enter_failed(link);
1881 return 1;
4ff296b0
YW		 1882 }
1883
1884 log_link_debug(link, "Joined netdev");
02b59d57 1885
34bf3c00 1886 if (link->enslaving == 0) {
4ff296b0
YW		 1887 r = link_joined(link);
1888 if (r < 0)
1889 link_enter_failed(link);
34bf3c00 1890 }
02b59d57
TG		 1891
1892 return 1;
1893}
1894
3f265037 1895static int link_enter_join_netdev(Link *link) {
6a0a2f86 1896 NetDev *netdev;
02b59d57
TG		 1897 int r;
1898
1899 assert(link);
1900 assert(link->network);
bd08ce56 1901 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1902
289e6774 1903 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1904
34bf3c00 1905 link->enslaving = 0;
02b59d57 1906
d9c67ea1 1907 if (link->network->bond) {
cbff7170
TJ		 1908 if (link->network->bond->state == NETDEV_STATE_READY &&
1909 link->network->bond->ifindex == link->master_ifindex)
1910 return link_joined(link);
1911
f2341e0a
LP		 1912 log_struct(LOG_DEBUG,
1913 LOG_LINK_INTERFACE(link),
1914 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1915 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1916
34bf3c00
YW		 1917 link->enslaving++;
1918
f2341e0a 1919 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1920 if (r < 0) {
f2341e0a
LP		 1921 log_struct_errno(LOG_WARNING, r,
1922 LOG_LINK_INTERFACE(link),
1923 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1924 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1925 link_enter_failed(link);
1926 return r;
c0267a59
AW		 1927 }
1928 }
1929
1930 if (link->network->batadv) {
1931 log_struct(LOG_DEBUG,
1932 LOG_LINK_INTERFACE(link),
1933 LOG_NETDEV_INTERFACE(link->network->batadv),
1934 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1935
1936 link->enslaving++;
1937
1938 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1939 if (r < 0) {
1940 log_struct_errno(LOG_WARNING, r,
1941 LOG_LINK_INTERFACE(link),
1942 LOG_NETDEV_INTERFACE(link->network->batadv),
1943 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1944 link_enter_failed(link);
1945 return r;
52433f6b 1946 }
0ad6148e
MO		 1947 }
1948
d9c67ea1 1949 if (link->network->bridge) {
f2341e0a
LP		 1950 log_struct(LOG_DEBUG,
1951 LOG_LINK_INTERFACE(link),
1952 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1953 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1954
34bf3c00
YW		 1955 link->enslaving++;
1956
f2341e0a 1957 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1958 if (r < 0) {
f2341e0a
LP		 1959 log_struct_errno(LOG_WARNING, r,
1960 LOG_LINK_INTERFACE(link),
1961 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1962 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1963 link_enter_failed(link);
1964 return r;
1965 }
52433f6b
TG		 1966 }
1967
6cb955c6
AR		 1968 if (link->network->vrf) {
1969 log_struct(LOG_DEBUG,
1970 LOG_LINK_INTERFACE(link),
1971 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1972 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1973
34bf3c00
YW		 1974 link->enslaving++;
1975
6cb955c6
AR		 1976 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1977 if (r < 0) {
1978 log_struct_errno(LOG_WARNING, r,
1979 LOG_LINK_INTERFACE(link),
1980 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1981 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1982 link_enter_failed(link);
1983 return r;
1984 }
6cb955c6
AR		 1985 }
1986
90e74a66 1987 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1988
2b6db913
YW		 1989 if (netdev->ifindex > 0)
1990 /* Assume already enslaved. */
a63e5daa 1991 continue;
a63e5daa 1992
7033af49
YW		 1993 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1994 continue;
1995
f2341e0a
LP		 1996 log_struct(LOG_DEBUG,
1997 LOG_LINK_INTERFACE(link),
1998 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 1999 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2000
34bf3c00
YW		 2001 link->enslaving++;
2002
f2341e0a 2003 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2004 if (r < 0) {
f2341e0a
LP		 2005 log_struct_errno(LOG_WARNING, r,
2006 LOG_LINK_INTERFACE(link),
2007 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2008 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2009 link_enter_failed(link);
2010 return r;
2011 }
326cb406
SS		 2012 }
2013
34bf3c00
YW		 2014 if (link->enslaving == 0)
2015 return link_joined(link);
2016
ef1ba606
TG		 2017 return 0;
2018}
2019
5e5b137a 2020static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2021 int k, r;
2022
2023 assert(link);
2024 assert(link->manager);
5e5b137a 2025
e36d601c 2026 r = link_drop_foreign_routes(link);
5e5b137a 2027
e36d601c 2028 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2029 if (k < 0 && r >= 0)
2030 r = k;
2031
e36d601c 2032 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2033 if (k < 0 && r >= 0)
2034 r = k;
d1bdafd2 2035
e36d601c 2036 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2037 if (k < 0 && r >= 0)
2038 r = k;
2039
0b81225e
YW		 2040 k = manager_drop_foreign_routing_policy_rules(link->manager);
2041 if (k < 0 && r >= 0)
2042 r = k;
2043
2044 return r;
5e5b137a
TG		 2045}
2046
3104883d 2047static int link_drop_config(Link *link) {
0b81225e
YW		 2048 int k, r;
2049
2050 assert(link);
2051 assert(link->manager);
3104883d 2052
e36d601c 2053 r = link_drop_routes(link);
3104883d 2054
e36d601c 2055 k = link_drop_nexthops(link);
0b81225e
YW		 2056 if (k < 0 && r >= 0)
2057 r = k;
d1bdafd2 2058
e36d601c 2059 k = link_drop_addresses(link);
0b81225e
YW		 2060 if (k < 0 && r >= 0)
2061 r = k;
2062
e36d601c 2063 k = link_drop_neighbors(link);
25b82b6e
YW		 2064 if (k < 0 && r >= 0)
2065 r = k;
2066
0b81225e
YW		 2067 k = manager_drop_routing_policy_rules(link->manager, link);
2068 if (k < 0 && r >= 0)
2069 r = k;
3104883d 2070
c69305ff
LP		 2071 ndisc_flush(link);
2072
0b81225e 2073 return r;
3104883d
SS		 2074}
2075
c3b94251 2076static int link_configure(Link *link) {
4ecdcb07
YW		 2077 int r;
2078
ef1ba606 2079 assert(link);
b22d8a00 2080 assert(link->network);
bd08ce56 2081 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2082
34658df2 2083 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2084 if (r < 0)
2085 return r;
2086
518cd6b5
SS		 2087 r = link_configure_sr_iov(link);
2088 if (r < 0)
2089 return r;
2090
500b96eb 2091 if (link->iftype == ARPHRD_CAN)
600b7898 2092 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2093 return link_configure_can(link);
92c918b0 2094
5e0534f1 2095 r = link_set_sysctl(link);
b69c3180
SS		 2096 if (r < 0)
2097 return r;
8749cbcd 2098
e16e4b3b
DS		 2099 r = link_set_mac(link);
2100 if (r < 0)
2101 return r;
2102
2103 r = link_set_nomaster(link);
2104 if (r < 0)
2105 return r;
2106
99d2baa2
SS		 2107 r = link_set_flags(link);
2108 if (r < 0)
2109 return r;
2110
89fe6535
SS		 2111 r = link_set_group(link);
2112 if (r < 0)
2113 return r;
2114
2ffd6d73
YW		 2115 r = ipv4ll_configure(link);
2116 if (r < 0)
2117 return r;
64b21ece 2118
2ffd6d73
YW		 2119 r = dhcp4_configure(link);
2120 if (r < 0)
2121 return r;
eb34d4af 2122
2ffd6d73
YW		 2123 r = dhcp6_configure(link);
2124 if (r < 0)
2125 return r;
f5a8c43f 2126
2ffd6d73
YW		 2127 r = ndisc_configure(link);
2128 if (r < 0)
2129 return r;
4138fb2c 2130
1d28a3cf
YW		 2131 r = link_request_dhcp_server(link);
2132 if (r < 0)
2133 return r;
2134
086b8853
YW		 2135 r = radv_configure(link);
2136 if (r < 0)
2137 return r;
7465dd22 2138
2ffd6d73
YW		 2139 r = link_lldp_rx_configure(link);
2140 if (r < 0)
2141 return r;
ce43e484 2142
f6fcc1c2 2143 r = link_configure_mtu(link);
40288ece
YW		 2144 if (r < 0)
2145 return r;
44b598a1 2146
9f6e82e6
YW		 2147 r = link_configure_addrgen_mode(link);
2148 if (r < 0)
2149 return r;
0e2fdb83 2150
3a390124
DS		 2151 return link_configure_continue(link);
2152}
2153
2154/* The configuration continues in this separate function, instead of
2155 * including this in the above link_configure() function, for two
2156 * reasons:
2157 * 1) some devices reset the link when the mtu is set, which caused
2158 * an infinite loop here in networkd; see:
2159 * https://github.com/systemd/systemd/issues/6593
2160 * https://github.com/systemd/systemd/issues/9831
2161 * 2) if ipv6ll is disabled, then bringing the interface up must be
2162 * delayed until after we get confirmation from the kernel that
2163 * the addr_gen_mode parameter has been set (via netlink), see:
2164 * https://github.com/systemd/systemd/issues/13882
2165 */
2166static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2167 int r;
2168
2169 assert(link);
2170 assert(link->network);
bd08ce56 2171 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2172
9524014e 2173 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2174 return 0;
2175
4c649652
DS		 2176 /* Drop foreign config, but ignore loopback or critical devices.
2177 * We do not want to remove loopback address or addresses used for root NFS. */
2178 if (!(link->flags & IFF_LOOPBACK) &&
2179 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2180 r = link_drop_foreign_config(link);
2181 if (r < 0)
2182 return r;
2183 }
2184
d236718c
DS		 2185 /* The kernel resets ipv6 mtu after changing device mtu;
2186 * we must set this here, after we've set device mtu */
2187 r = link_set_ipv6_mtu(link);
2188 if (r < 0)
5e0534f1 2189 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2190
3f265037 2191 return link_enter_join_netdev(link);
505f8da7
TG		 2192}
2193
170e88c8
YW		 2194static int link_get_network(Link *link, Network **ret) {
2195 Network *network;
1a3caa49 2196 int r;
170e88c8
YW		 2197
2198 assert(link);
2199 assert(link->manager);
2200 assert(ret);
2201
2202 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
2203 bool warn = false;
2204
1a3caa49 2205 r = net_match_config(
170e88c8
YW		 2206 &network->match,
2207 link->sd_device,
2208 &link->hw_addr.addr.ether,
2209 &link->permanent_mac,
2210 link->driver,
2211 link->iftype,
2212 link->ifname,
2213 link->alternative_names,
2214 link->wlan_iftype,
2215 link->ssid,
1a3caa49
YW		 2216 &link->bssid);
2217 if (r < 0)
2218 return r;
2219 if (r == 0)
170e88c8
YW		 2220 continue;
2221
2222 if (network->match.ifname && link->sd_device) {
2223 uint8_t name_assign_type = NET_NAME_UNKNOWN;
2224 const char *attr;
2225
2226 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
2227 (void) safe_atou8(attr, &name_assign_type);
2228
2229 warn = name_assign_type == NET_NAME_ENUM;
2230 }
2231
2232 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
2233 "found matching network '%s'%s.",
2234 network->filename,
2235 warn ? ", based on potentially unpredictable interface name" : "");
2236
2237 if (network->unmanaged)
2238 return -ENOENT;
2239
2240 *ret = network;
2241 return 0;
2242 }
2243
2244 return -ENOENT;
2245}
2246
0b54c870
YW		 2247static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2248 _cleanup_strv_free_ char **altnames = NULL;
2249 char **n;
2250 int r;
2251
2252 assert(link);
2253 assert(message);
2254
2255 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2256 if (r < 0 && r != -ENODATA)
2257 return r;
2258
2259 STRV_FOREACH(n, link->alternative_names)
2260 hashmap_remove(link->manager->links_by_name, *n);
2261
2262 strv_free_and_replace(link->alternative_names, altnames);
2263
2264 STRV_FOREACH(n, link->alternative_names) {
2265 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2266 if (r < 0)
2267 return r;
2268 }
2269
2270 return 0;
2271}
2272
572b21d9 2273static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 2274 Network *network;
2275 int r;
2276
8bceafa7 2277 assert(m);
572b21d9 2278
8bceafa7
YW		 2279 r = sd_netlink_message_get_errno(m);
2280 if (r < 0)
2281 return r;
572b21d9 2282
0b54c870
YW		 2283 r = link_update_alternative_names(link, m);
2284 if (r < 0)
8bceafa7 2285 return r;
572b21d9 2286
170e88c8 2287 r = link_get_network(link, &network);
ad932b15
YW		 2288 if (r == -ENOENT) {
2289 link_enter_unmanaged(link);
2290 return 0;
170e88c8
YW		 2291 }
2292 if (r < 0)
ad932b15
YW		 2293 return r;
2294
99b8517c 2295 if (link->network == network && !force)
ad932b15
YW		 2296 return 0;
2297
2298 log_link_info(link, "Re-configuring with %s", network->filename);
2299
2300 /* Dropping old .network file */
2a99eed0 2301 r = link_stop_engines(link, false);
572b21d9 2302 if (r < 0)
ad932b15 2303 return r;
ad932b15 2304
19d9a5ad
YW		 2305 link_drop_requests(link);
2306
ad932b15
YW		 2307 r = link_drop_config(link);
2308 if (r < 0)
2309 return r;
2310
2c7b826d 2311 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2312 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2313 r = link_drop_foreign_config(link);
2314 if (r < 0)
2315 return r;
2316 }
2317
2318 link_free_carrier_maps(link);
2319 link_free_engines(link);
2320 link->network = network_unref(link->network);
59c31eba 2321 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2322
2323 /* Then, apply new .network file */
9092113d
YW		 2324 link->network = network_ref(network);
2325 link_dirty(link);
ad932b15
YW		 2326
2327 r = link_new_carrier_maps(link);
2328 if (r < 0)
2329 return r;
2330
2331 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2332 link->activated = false;
ad932b15 2333
ad932b15
YW		 2334 r = link_configure(link);
2335 if (r < 0)
2336 return r;
2337
2338 return 0;
2339}
2340
572b21d9
YW		 2341static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2342 int r;
2343
2344 r = link_reconfigure_internal(link, m, false);
2345 if (r < 0)
2346 link_enter_failed(link);
2347
2348 return 1;
2349}
2350
2351static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2352 int r;
2353
2354 r = link_reconfigure_internal(link, m, true);
2355 if (r < 0)
2356 link_enter_failed(link);
2357
2358 return 1;
2359}
2360
2361int link_reconfigure(Link *link, bool force) {
2362 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2363 int r;
2364
8bceafa7 2365 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2366 * the function from being called multiple times simultaneously, refuse to reconfigure the
2367 * interface in these cases. */
8bceafa7 2368 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2369 return 0; /* 0 means no-op. */
2c0d7ed3 2370
572b21d9
YW		 2371 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2372 link->ifindex);
2373 if (r < 0)
2374 return r;
2375
2376 r = netlink_call_async(link->manager->rtnl, NULL, req,
2377 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2378 link_netlink_destroy_callback, link);
2379 if (r < 0)
2380 return r;
2381
2382 link_ref(link);
2383
8bceafa7 2384 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2385}
2386
e6bf7774 2387static int link_initialized_and_synced(Link *link) {
505f8da7 2388 Network *network;
505f8da7
TG		 2389 int r;
2390
2391 assert(link);
2392 assert(link->ifname);
2393 assert(link->manager);
2394
bd08ce56
YW		 2395 /* We may get called either from the asynchronous netlink callback,
2396 * or directly for link_add() if running in a container. See link_add(). */
2397 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2398 return 0;
505f8da7 2399
6a7a4e4d 2400 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2401 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2402
0d4ad91d
AR		 2403 r = link_new_bound_by_list(link);
2404 if (r < 0)
2405 return r;
2406
2407 r = link_handle_bound_by_list(link);
2408 if (r < 0)
2409 return r;
2410
c4a03a56 2411 if (!link->network) {
0894cfe4 2412 r = wifi_get_info(link);
8d968fdd
YW		 2413 if (r < 0)
2414 return r;
2415
170e88c8 2416 r = link_get_network(link, &network);
c4a03a56
TG		 2417 if (r == -ENOENT) {
2418 link_enter_unmanaged(link);
4232cf04 2419 return 0;
170e88c8
YW		 2420 }
2421 if (r < 0)
c4a03a56 2422 return r;
505f8da7 2423
c4a03a56
TG		 2424 if (link->flags & IFF_LOOPBACK) {
2425 if (network->link_local != ADDRESS_FAMILY_NO)
2426 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2427
c4a03a56
TG		 2428 if (network->dhcp != ADDRESS_FAMILY_NO)
2429 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2430
c4a03a56
TG		 2431 if (network->dhcp_server)
2432 log_link_debug(link, "Ignoring DHCP server for loopback link");
2433 }
bd2efe92 2434
9092113d 2435 link->network = network_ref(network);
bcdcc596 2436 link_update_operstate(link, false);
9092113d 2437 link_dirty(link);
c4a03a56 2438 }
505f8da7 2439
0d4ad91d
AR		 2440 r = link_new_bound_to_list(link);
2441 if (r < 0)
2442 return r;
2443
a748b692
TG		 2444 r = link_configure(link);
2445 if (r < 0)
2446 return r;
2447
4232cf04 2448 return 0;
505f8da7
TG		 2449}
2450
302a796f 2451static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 2452 int r;
2453
572b21d9
YW		 2454 r = sd_netlink_message_get_errno(m);
2455 if (r < 0) {
40681e5c 2456 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2457 link_enter_failed(link);
2458 return 0;
2459 }
2460
0b54c870
YW		 2461 r = link_update_alternative_names(link, m);
2462 if (r < 0) {
572b21d9 2463 link_enter_failed(link);
0b54c870 2464 return r;
572b21d9
YW		 2465 }
2466
4ff296b0
YW		 2467 r = link_initialized_and_synced(link);
2468 if (r < 0)
2469 link_enter_failed(link);
e6bf7774
YW		 2470 return 1;
2471}
2472
3be9d62a 2473static int link_initialized(Link *link, sd_device *device) {
4afd3348 2474 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2475 int r;
2476
2477 assert(link);
2478 assert(link->manager);
2479 assert(link->manager->rtnl);
2480 assert(device);
2481
8434fd5c 2482 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2483 return 0;
2484
51517f9e 2485 if (link->sd_device)
679b3605
TG		 2486 return 0;
2487
79008bdd 2488 log_link_debug(link, "udev initialized link");
bd08ce56 2489 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2490
51517f9e 2491 link->sd_device = sd_device_ref(device);
4f561e8e 2492
3c9b8860
TG		 2493 /* udev has initialized the link, but we don't know if we have yet
2494 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2495 * when it returns we know that the pending NEWLINKs have already been
2496 * processed and that we are up-to-date */
4f561e8e 2497
3c9b8860
TG		 2498 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2499 link->ifindex);
4f561e8e
TG		 2500 if (r < 0)
2501 return r;
2502
302a796f
YW		 2503 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2504 link_netlink_destroy_callback, link);
4f561e8e
TG		 2505 if (r < 0)
2506 return r;
2507
5da8149f
TG		 2508 link_ref(link);
2509
4f561e8e
TG		 2510 return 0;
2511}
2512
cc2d7efc
YW		 2513static Link *link_drop_or_unref(Link *link) {
2514 if (!link)
2515 return NULL;
2516 if (!link->manager)
2517 return link_unref(link);
2518 return link_drop(link);
2519}
2520
2521DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2522
2523static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
2524 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
2525 _cleanup_free_ char *ifname = NULL, *kind = NULL;
2526 unsigned short iftype;
2527 int r, ifindex;
2528 uint16_t type;
2529
2530 assert(manager);
2531 assert(message);
2532 assert(ret);
2533
2534 r = sd_netlink_message_get_type(message, &type);
2535 if (r < 0)
2536 return r;
2537 else if (type != RTM_NEWLINK)
2538 return -EINVAL;
2539
2540 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2541 if (r < 0)
2542 return r;
2543 else if (ifindex <= 0)
2544 return -EINVAL;
2545
2546 r = sd_rtnl_message_link_get_type(message, &iftype);
2547 if (r < 0)
2548 return r;
2549
2550 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2551 if (r < 0)
2552 return r;
2553
2554 /* check for link kind */
2555 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2556 if (r >= 0) {
2557 (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2558 r = sd_netlink_message_exit_container(message);
2559 if (r < 0)
2560 return r;
2561 }
2562
2563 link = new(Link, 1);
2564 if (!link)
2565 return -ENOMEM;
2566
2567 *link = (Link) {
2568 .n_ref = 1,
2569 .state = LINK_STATE_PENDING,
bcdcc596 2570 .online_state = _LINK_ONLINE_STATE_INVALID,
cc2d7efc
YW		 2571 .ifindex = ifindex,
2572 .iftype = iftype,
2573 .ifname = TAKE_PTR(ifname),
2574 .kind = TAKE_PTR(kind),
2575
2576 .n_dns = UINT_MAX,
2577 .dns_default_route = -1,
2578 .llmnr = _RESOLVE_SUPPORT_INVALID,
2579 .mdns = _RESOLVE_SUPPORT_INVALID,
2580 .dnssec_mode = _DNSSEC_MODE_INVALID,
2581 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2582 };
2583
2584 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
2585 if (r < 0)
2586 return r;
2587
2588 link->manager = manager;
2589
2590 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex);
2591 if (r < 0)
2592 log_link_debug_errno(link, r, "New device has no master, continuing without");
2593
2594 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
2595 if (r < 0)
2596 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
2597
2598 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2599 if (r < 0)
2600 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
2601
2602 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2603 if (r < 0)
2604 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2605
2606 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2607 if (r < 0)
2608 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2609
cc2d7efc
YW		 2610 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
2611 return -ENOMEM;
2612
2613 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
2614 return -ENOMEM;
2615
2616 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
2617 return -ENOMEM;
2618
0b54c870
YW		 2619 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
2620 if (r < 0)
2621 return r;
2622
2623 r = link_update_alternative_names(link, message);
2624 if (r < 0)
2625 return r;
2626
cc2d7efc
YW		 2627 r = link_update_flags(link, message, false);
2628 if (r < 0)
2629 return r;
2630
2631 *ret = TAKE_PTR(link);
2632
2633 return 0;
2634}
2635
3be9d62a 2636static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2637 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2638 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2639 Link *link;
5a937ea2 2640 int r;
505f8da7
TG		 2641
2642 assert(m);
fbbeb65a 2643 assert(m->rtnl);
505f8da7
TG		 2644 assert(message);
2645 assert(ret);
2646
2647 r = link_new(m, message, ret);
2648 if (r < 0)
2649 return r;
2650
2651 link = *ret;
2652
6a7a4e4d 2653 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2654
bf331d87
YW		 2655 if (path_is_read_only_fs("/sys") <= 0) {
2656 /* udev should be around */
ae06ab10 2657 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2658 r = sd_device_new_from_device_id(&device, ifindex_str);
2659 if (r < 0) {
83e7c37b 2660 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2661 return 0;
5c416fc4 2662 }
505f8da7 2663
5a937ea2 2664 r = sd_device_get_is_initialized(device);
51517f9e 2665 if (r < 0) {
bf331d87 2666 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2667 goto failed;
2668 }
5a937ea2 2669 if (r == 0) {
505f8da7 2670 /* not yet ready */
79008bdd 2671 log_link_debug(link, "link pending udev initialization...");
505f8da7 2672 return 0;
3c4cb064 2673 }
505f8da7 2674
299ad32d
YW		 2675 r = device_is_renaming(device);
2676 if (r < 0) {
bf331d87 2677 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2678 goto failed;
2679 }
2680 if (r > 0) {
bf331d87 2681 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2682 return 0;
2683 }
2684
4f561e8e
TG		 2685 r = link_initialized(link, device);
2686 if (r < 0)
5c416fc4 2687 goto failed;
4f561e8e 2688 } else {
e6bf7774 2689 r = link_initialized_and_synced(link);
4f561e8e 2690 if (r < 0)
5c416fc4 2691 goto failed;
4f561e8e 2692 }
505f8da7 2693
a748b692 2694 return 0;
5c416fc4
TG		 2695failed:
2696 link_enter_failed(link);
2697 return r;
a748b692
TG		 2698}
2699
c601ebf7 2700int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2701 int r;
2702
2703 assert(link);
2704
2705 log_link_info(link, "Gained IPv6LL");
2706
c601ebf7 2707 link->ipv6ll_address = *address;
e7ab854c
TG		 2708 link_check_ready(link);
2709
b9ea3d2e 2710 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2711 r = link_acquire_ipv6_conf(link);
2712 if (r < 0) {
2713 link_enter_failed(link);
2714 return r;
2715 }
2716 }
2717
2718 return 0;
2719}
2720
3be9d62a
YW		 2721int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2722 sd_device_action_t action;
2723 Manager *m = userdata;
2724 Link *link = NULL;
2725 int r, ifindex;
2726
2727 assert(m);
2728 assert(device);
2729
2730 r = sd_device_get_action(device, &action);
2731 if (r < 0) {
2732 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2733 return 0;
2734 }
2735
2736 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2737 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2738 * still exists — and we are interested in that. */
2739 if (action == SD_DEVICE_REMOVE)
2740 return 0;
2741
2742 r = sd_device_get_ifindex(device, &ifindex);
2743 if (r < 0) {
2744 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2745 device_action_to_string(action));
2746 return 0;
2747 }
2748
2749 r = device_is_renaming(device);
2750 if (r < 0) {
2751 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2752 device_action_to_string(action));
2753 return 0;
2754 }
2755 if (r > 0) {
2756 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2757 return 0;
2758 }
2759
2760 r = link_get(m, ifindex, &link);
2761 if (r < 0) {
2762 if (r != -ENODEV)
2763 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2764 return 0;
2765 }
2766
2767 (void) link_initialized(link, device);
2768
2769 return 0;
2770}
2771
9c0a72f9
TG		 2772static int link_carrier_gained(Link *link) {
2773 int r;
2774
2775 assert(link);
2776
600b7898
YW		 2777 if (link->iftype == ARPHRD_CAN)
2778 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2779 return link_handle_bound_by_list(link);
2780
0894cfe4 2781 r = wifi_get_info(link);
8d968fdd
YW		 2782 if (r < 0)
2783 return r;
2784 if (r > 0) {
8bceafa7 2785 r = link_reconfigure(link, false);
572b21d9
YW		 2786 if (r < 0) {
2787 link_enter_failed(link);
8d968fdd 2788 return r;
572b21d9 2789 }
8d968fdd
YW		 2790 }
2791
b9ea3d2e 2792 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2793 r = link_acquire_conf(link);
2794 if (r < 0) {
2795 link_enter_failed(link);
2796 return r;
2797 }
6fc25497 2798
b425c3ae 2799 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2800 r = link_set_static_configs(link);
6fc25497
SS		 2801 if (r < 0)
2802 return r;
9c0a72f9
TG		 2803 }
2804
0d4ad91d
AR		 2805 r = link_handle_bound_by_list(link);
2806 if (r < 0)
2807 return r;
2808
1f241589
YW		 2809 if (!link->bridge_mdb_configured) {
2810 r = link_set_bridge_mdb(link);
2811 if (r < 0)
2812 return r;
2813 }
2814
2815 if (streq_ptr(link->kind, "bridge")) {
2816 Link *slave;
2817
2818 SET_FOREACH(slave, link->slaves) {
2819 if (slave->bridge_mdb_configured)
2820 continue;
2821
2822 r = link_set_bridge_mdb(slave);
2823 if (r < 0)
2824 link_enter_failed(slave);
2825 }
2826 }
3db468ea 2827
9c0a72f9
TG		 2828 return 0;
2829}
2830
2831static int link_carrier_lost(Link *link) {
2832 int r;
2833
2834 assert(link);
2835
25e992ba 2836 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2837 return 0;
2838
600b7898
YW		 2839 if (link->iftype == ARPHRD_CAN)
2840 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2841 return link_handle_bound_by_list(link);
2842
fbdb6605 2843 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2844 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2845 * configuration and stop the clients as well. */
97e7fb39
SS		 2846 if (link->setting_mtu)
2847 return 0;
2848
2a99eed0 2849 r = link_stop_engines(link, false);
9c0a72f9
TG		 2850 if (r < 0) {
2851 link_enter_failed(link);
2852 return r;
2853 }
2854
19d9a5ad
YW		 2855 link_drop_requests(link);
2856
3104883d
SS		 2857 r = link_drop_config(link);
2858 if (r < 0)
2859 return r;
2860
2c7b826d 2861 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2862 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2863 r = link_drop_foreign_config(link);
2864 if (r < 0)
2865 return r;
2866 }
3104883d 2867
0d4ad91d
AR		 2868 r = link_handle_bound_by_list(link);
2869 if (r < 0)
2870 return r;
2871
9c0a72f9
TG		 2872 return 0;
2873}
2874
2875int link_carrier_reset(Link *link) {
2876 int r;
2877
2878 assert(link);
2879
2880 if (link_has_carrier(link)) {
2881 r = link_carrier_lost(link);
2882 if (r < 0)
2883 return r;
2884
2885 r = link_carrier_gained(link);
2886 if (r < 0)
2887 return r;
2888
6a7a4e4d 2889 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2890 }
2891
2892 return 0;
2893}
2894
d236718c
DS		 2895static int link_admin_state_up(Link *link) {
2896 int r;
2897
61135582
DS		 2898 assert(link);
2899
3be9d62a
YW		 2900 /* This is called every time an interface admin state changes to up;
2901 * specifically, when IFF_UP flag changes from unset to set. */
2902
61135582
DS		 2903 if (!link->network)
2904 return 0;
2905
2906 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2907 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2908 return link_down(link, NULL);
2909 }
2910
d236718c
DS		 2911 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2912 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2913 * ipv6_mtu_set prevents this from trying to set it too early before
2914 * the link->network has been setup; we only need to reset it
2915 * here if we've already set it during normal initialization. */
2916 if (link->ipv6_mtu_set) {
2917 r = link_set_ipv6_mtu(link);
2918 if (r < 0)
2919 return r;
2920 }
2921
2922 return 0;
2923}
2924
61135582 2925static int link_admin_state_down(Link *link) {
61135582
DS		 2926 assert(link);
2927
2928 if (!link->network)
2929 return 0;
2930
2931 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2932 if (streq_ptr(link->kind, "can") && !link->can_configured)
2933 /* CAN device needs to be down on configure. */
2934 return 0;
2935
61135582
DS		 2936 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2937 return link_up(link);
2938 }
2939
2940 return 0;
2941}
2942
3be9d62a 2943static int link_update(Link *link, sd_netlink_message *m) {
b8162cd2 2944 hw_addr_data hw_addr;
ca4e095a 2945 const char *ifname;
afe7fd56 2946 uint32_t mtu;
d236718c 2947 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2948 int old_master, r;
22936833 2949
dd3efc09 2950 assert(link);
b8941f74 2951 assert(link->ifname);
22936833
TG		 2952 assert(m);
2953
7619683b 2954 if (link->state == LINK_STATE_LINGER) {
5238e957 2955 log_link_info(link, "Link re-added");
289e6774 2956 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2957
2958 r = link_new_carrier_maps(link);
2959 if (r < 0)
2960 return r;
7619683b
TG		 2961 }
2962
1c4baffc 2963 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2964 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2965 Manager *manager = link->manager;
b8941f74 2966
30de2b89 2967 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2968
30de2b89
YW		 2969 link_drop(link);
2970 r = link_add(manager, m, &link);
2971 if (r < 0)
2972 return r;
0b54c870
YW		 2973 } else {
2974 r = link_update_alternative_names(link, m);
2975 if (r < 0)
2976 return r;
b8941f74
TG		 2977 }
2978
1c4baffc 2979 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2980 if (r >= 0 && mtu > 0) {
2981 link->mtu = mtu;
4e964aa0 2982 if (link->original_mtu == 0) {
afe7fd56 2983 link->original_mtu = mtu;
6a7a4e4d 2984 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2985 }
2986
2987 if (link->dhcp_client) {
3c9b8860
TG		 2988 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2989 link->mtu);
fc95c359
YW		 2990 if (r < 0)
2991 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2992 }
7465dd22
PF		 2993
2994 if (link->radv) {
2995 r = sd_radv_set_mtu(link->radv, link->mtu);
2996 if (r < 0)
2997 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2998 }
9842de0d 2999 }
69629de9 3000
e9189a1f
TG		 3001 /* The kernel may broadcast NEWLINK messages without the MAC address
3002 set, simply ignore them. */
b8162cd2
TR		 3003 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
3004 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
3005 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 3006
b8162cd2 3007 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 3008
b8162cd2 3009 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 3010
a3adb4a6
YW		 3011 r = ipv4ll_update_mac(link);
3012 if (r < 0)
3013 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 3014
d947f7f9
YW		 3015 r = dhcp4_update_mac(link);
3016 if (r < 0)
3017 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 3018
eebba6dc
YW		 3019 r = dhcp6_update_mac(link);
3020 if (r < 0)
3021 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 3022
d0c4275c 3023 r = radv_update_mac(link);
be9363cc
YW		 3024 if (r < 0)
3025 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 3026
3027 if (link->ndisc) {
b8162cd2 3028 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 3029 if (r < 0)
3030 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
3031 }
d93d655c 3032
dfc58b47
YW		 3033 if (link->lldp) {
3034 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
3035 if (r < 0)
3036 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
3037 }
3038
d93d655c
YW		 3039 r = ipv4_dad_update_mac(link);
3040 if (r < 0)
3041 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 3042 }
3043
bb262ef0
YW		 3044 old_master = link->master_ifindex;
3045 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
3046
d236718c 3047 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 3048 had_carrier = link_has_carrier(link);
3049
bb262ef0 3050 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 3051 if (r < 0)
3052 return r;
3053
d236718c
DS		 3054 if (!link_was_admin_up && (link->flags & IFF_UP)) {
3055 log_link_info(link, "Link UP");
3056
3057 r = link_admin_state_up(link);
3058 if (r < 0)
3059 return r;
61135582 3060 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 3061 log_link_info(link, "Link DOWN");
3062
61135582
DS		 3063 r = link_admin_state_down(link);
3064 if (r < 0)
3065 return r;
3066 }
3067
273eec24
LP		 3068 r = link_update_lldp(link);
3069 if (r < 0)
3070 return r;
3071
a61bb41c
TG		 3072 carrier_gained = !had_carrier && link_has_carrier(link);
3073 carrier_lost = had_carrier && !link_has_carrier(link);
3074
3075 if (carrier_gained) {
6a7a4e4d 3076 log_link_info(link, "Gained carrier");
a61bb41c 3077
9c0a72f9
TG		 3078 r = link_carrier_gained(link);
3079 if (r < 0)
3080 return r;
a61bb41c 3081 } else if (carrier_lost) {
6a7a4e4d 3082 log_link_info(link, "Lost carrier");
a61bb41c 3083
9c0a72f9
TG		 3084 r = link_carrier_lost(link);
3085 if (r < 0)
a61bb41c 3086 return r;
a61bb41c
TG		 3087 }
3088
3089 return 0;
dd3efc09 3090}
fe8db0c5 3091
3be9d62a
YW		 3092int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
3093 Link *link = NULL;
3094 NetDev *netdev = NULL;
3095 uint16_t type;
3096 const char *name;
3097 int r, ifindex;
3098
3099 assert(rtnl);
3100 assert(message);
3101 assert(m);
3102
3103 if (sd_netlink_message_is_error(message)) {
3104 r = sd_netlink_message_get_errno(message);
3105 if (r < 0)
3106 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
3107
3108 return 0;
3109 }
3110
3111 r = sd_netlink_message_get_type(message, &type);
3112 if (r < 0) {
3113 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
3114 return 0;
3115 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
3116 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
3117 return 0;
3118 }
3119
3120 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
3121 if (r < 0) {
3122 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
3123 return 0;
3124 } else if (ifindex <= 0) {
3125 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
3126 return 0;
3127 }
3128
3129 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
3130 if (r < 0) {
3131 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
3132 return 0;
3133 }
3134
3135 (void) link_get(m, ifindex, &link);
3136 (void) netdev_get(m, name, &netdev);
3137
3138 switch (type) {
3139 case RTM_NEWLINK:
3140 if (!link) {
3141 /* link is new, so add it */
3142 r = link_add(m, message, &link);
3143 if (r < 0) {
3144 log_warning_errno(r, "Could not process new link message, ignoring: %m");
3145 return 0;
3146 }
3147 }
3148
3149 if (netdev) {
3150 /* netdev exists, so make sure the ifindex matches */
3151 r = netdev_set_ifindex(netdev, message);
3152 if (r < 0) {
3153 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
3154 return 0;
3155 }
3156 }
3157
3158 r = link_update(link, message);
3159 if (r < 0) {
3160 log_warning_errno(r, "Could not process link message, ignoring: %m");
3161 return 0;
3162 }
3163
3164 break;
3165
3166 case RTM_DELLINK:
3167 link_drop(link);
3168 netdev_drop(netdev);
3169
3170 break;
3171
3172 default:
3173 assert_not_reached("Received link message with invalid RTNL message type.");
3174 }
3175
3176 return 1;
3177}
3178
fe8db0c5 3179static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3180 [LINK_STATE_PENDING] = "pending",
bd08ce56 3181 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3182 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3183 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3184 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3185 [LINK_STATE_FAILED] = "failed",
370e9930 3186 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3187};
3188
3189DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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