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