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network: nexthop: add NextHop object before sending netlink request
[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"
3ddcbeea 30#include "networkd-can.h"
8fcf1d61 31#include "networkd-dhcp-server.h"
ca5ad760
YW		 32#include "networkd-dhcp4.h"
33#include "networkd-dhcp6.h"
ee446d57 34#include "networkd-fdb.h"
ca5ad760 35#include "networkd-ipv4ll.h"
6a1af3d4
YW		 36#include "networkd-link-bus.h"
37#include "networkd-link.h"
8e1ad1ea 38#include "networkd-lldp-tx.h"
23f53b99 39#include "networkd-manager.h"
dbf63196 40#include "networkd-mdb.h"
1e7a0e21 41#include "networkd-ndisc.h"
e4a71bf3 42#include "networkd-neighbor.h"
75156ccb 43#include "networkd-nexthop.h"
518cd6b5 44#include "networkd-sriov.h"
5e0534f1 45#include "networkd-sysctl.h"
7465dd22 46#include "networkd-radv.h"
bce67bbe 47#include "networkd-routing-policy-rule.h"
3b5a4fc6 48#include "networkd-state-file.h"
8d968fdd 49#include "networkd-wifi.h"
cf1d700d
TG		 50#include "set.h"
51#include "socket-util.h"
bf331d87 52#include "stat-util.h"
15a5e950 53#include "stdio-util.h"
8b43440b 54#include "string-table.h"
51517f9e 55#include "strv.h"
62e021a9 56#include "sysctl-util.h"
34658df2 57#include "tc.h"
e4de7287 58#include "tmpfile-util.h"
299ad32d 59#include "udev-util.h"
cf1d700d 60#include "util.h"
737f1405 61#include "vrf.h"
fc2f9534 62
3ca1fab7 63bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 64 assert(link);
65
78c958f8
TG		 66 if (link->flags & IFF_LOOPBACK)
67 return false;
68
69 if (!link->network)
70 return false;
71
500b96eb 72 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 73 return false;
74
98d20a17 75 if (STRPTR_IN_SET(link->kind,
76 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 77 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 78 return false;
79
f410d463
YW		 80 /* L3 or L3S mode do not support ARP. */
81 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
82 return false;
83
f2bfcdb9
YW		 84 if (link->network->bond)
85 return false;
86
3ca1fab7 87 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 88}
89
f8f2f880 90bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 91 assert(link);
92
fa709992
LP		 93 if (!socket_ipv6_is_supported())
94 return false;
95
d0d6a4cd
TG		 96 if (link->flags & IFF_LOOPBACK)
97 return false;
98
99 if (!link->network)
100 return false;
101
500b96eb 102 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 103 return false;
104
105 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
e0ee46f2 111 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 112}
113
5e0534f1 114bool link_ipv6_enabled(Link *link) {
439689c6
SS		 115 assert(link);
116
117 if (!socket_ipv6_is_supported())
118 return false;
119
b102cdca 120 if (link->network->bond)
2b00a4e0
TY		 121 return false;
122
500b96eb 123 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 124 return false;
125
4cef7fe3 126 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 127 if (link_ipv6ll_enabled(link))
128 return true;
129
130 if (network_has_static_ipv6_configurations(link->network))
131 return true;
132
133 return false;
439689c6
SS		 134}
135
34bf3c00
YW		 136static bool link_is_enslaved(Link *link) {
137 if (link->flags & IFF_SLAVE)
138 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
139 return true;
140
34bf3c00
YW		 141 if (!link->network)
142 return false;
143
bb262ef0 144 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 145 return true;
146
bb262ef0
YW		 147 /* TODO: add conditions for other netdevs. */
148
34bf3c00
YW		 149 return false;
150}
151
45e11abf
YW		 152static void link_update_master_operstate(Link *link, NetDev *netdev) {
153 Link *master;
154
155 if (!netdev)
156 return;
157
7936917e
YW		 158 if (netdev->ifindex <= 0)
159 return;
160
45e11abf
YW		 161 if (link_get(link->manager, netdev->ifindex, &master) < 0)
162 return;
163
164 link_update_operstate(master, true);
165}
166
8430841b
L		 167static LinkAddressState address_state_from_scope(uint8_t scope) {
168 if (scope < RT_SCOPE_SITE)
169 /* universally accessible addresses found */
170 return LINK_ADDRESS_STATE_ROUTABLE;
171
172 if (scope < RT_SCOPE_HOST)
173 /* only link or site local addresses found */
174 return LINK_ADDRESS_STATE_DEGRADED;
175
176 /* no useful addresses found */
177 return LINK_ADDRESS_STATE_OFF;
178}
179
45e11abf 180void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 181 LinkOperationalState operstate;
1678fbb3 182 LinkCarrierState carrier_state;
8430841b 183 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
35c5a9ca 184 _cleanup_strv_free_ char **p = NULL;
90afec18 185 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 186 bool changed = false;
1678fbb3 187 Address *address;
14153d1b 188
84de38c5
TG		 189 assert(link);
190
191 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 192 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 193 else if (link_has_carrier(link)) {
1678fbb3
YW		 194 if (link_is_enslaved(link))
195 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 196 else
1678fbb3 197 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 198 } else if (link->flags & IFF_UP)
1678fbb3 199 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 200 else
1678fbb3 201 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 202
1678fbb3 203 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 204 Link *slave;
205
90e74a66 206 SET_FOREACH(slave, link->slaves) {
959f65d3 207 link_update_operstate(slave, false);
84de38c5 208
1678fbb3
YW		 209 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
210 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 211 }
959f65d3 212 }
84de38c5 213
90e74a66 214 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 215 if (!address_is_ready(address))
216 continue;
84de38c5 217
90afec18
YW		 218 if (address->family == AF_INET)
219 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 220
90afec18
YW		 221 if (address->family == AF_INET6)
222 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 223 }
84de38c5 224
1678fbb3 225 /* for operstate we also take foreign addresses into account */
90e74a66 226 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 227 if (!address_is_ready(address))
228 continue;
229
90afec18
YW		 230 if (address->family == AF_INET)
231 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 232
90afec18
YW		 233 if (address->family == AF_INET6)
234 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 235 }
236
8430841b
L		 237 ipv4_address_state = address_state_from_scope(ipv4_scope);
238 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 239 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 240
241 /* Mapping of address and carrier state vs operational state
242 * carrier state
243 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
244 * ------------------------------------------------------------------------------
245 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
246 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
247 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
248 */
84de38c5 249
1678fbb3
YW		 250 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
251 operstate = (LinkOperationalState) carrier_state;
252 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
253 operstate = LINK_OPERSTATE_ROUTABLE;
254 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
255 operstate = LINK_OPERSTATE_DEGRADED;
256 else
14153d1b
YW		 257 operstate = LINK_OPERSTATE_ENSLAVED;
258
35c5a9ca
YW		 259 if (link->carrier_state != carrier_state) {
260 link->carrier_state = carrier_state;
261 changed = true;
262 if (strv_extend(&p, "CarrierState") < 0)
263 log_oom();
264 }
959f65d3 265
35c5a9ca
YW		 266 if (link->address_state != address_state) {
267 link->address_state = address_state;
268 changed = true;
269 if (strv_extend(&p, "AddressState") < 0)
270 log_oom();
959f65d3
YW		 271 }
272
8430841b
L		 273 if (link->ipv4_address_state != ipv4_address_state) {
274 link->ipv4_address_state = ipv4_address_state;
275 changed = true;
276 if (strv_extend(&p, "IPv4AddressState") < 0)
277 log_oom();
278 }
279
280 if (link->ipv6_address_state != ipv6_address_state) {
281 link->ipv6_address_state = ipv6_address_state;
282 changed = true;
283 if (strv_extend(&p, "IPv6AddressState") < 0)
284 log_oom();
285 }
286
84de38c5
TG		 287 if (link->operstate != operstate) {
288 link->operstate = operstate;
35c5a9ca
YW		 289 changed = true;
290 if (strv_extend(&p, "OperationalState") < 0)
291 log_oom();
84de38c5 292 }
959f65d3 293
35c5a9ca
YW		 294 if (p)
295 link_send_changed_strv(link, p);
296 if (changed)
297 link_dirty(link);
298
45e11abf 299 if (also_update_master && link->network) {
c0267a59 300 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 301 link_update_master_operstate(link, link->network->bond);
302 link_update_master_operstate(link, link->network->bridge);
959f65d3 303 }
84de38c5
TG		 304}
305
51d18171
TG		 306#define FLAG_STRING(string, flag, old, new) \
307 (((old ^ new) & flag) \
308 ? ((old & flag) ? (" -" string) : (" +" string)) \
309 : "")
310
bb262ef0 311static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 312 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
313 uint8_t operstate;
314 int r;
315
316 assert(link);
317
318 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 319 if (r < 0)
320 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 321
1c4baffc 322 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 323 if (r < 0)
324 /* if we got a message without operstate, take it to mean
325 the state was unchanged */
326 operstate = link->kernel_operstate;
327
bb262ef0 328 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 329 return 0;
330
331 if (link->flags != flags) {
6a7a4e4d 332 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		 333 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
334 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
335 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
336 FLAG_STRING("UP", IFF_UP, link->flags, flags),
337 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
338 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
339 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
340 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
341 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
342 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
343 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
344 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
345 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
346 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
347 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
348 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
349 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
350 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
351 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
352
353 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
354 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
355 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
356 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
357 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
358 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
359 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
360 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
361
362 /* link flags are currently at most 18 bits, let's align to
363 * printing 20 */
364 if (unknown_flags_added)
79008bdd 365 log_link_debug(link,
6a7a4e4d 366 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 367 unknown_flags_added);
368
369 if (unknown_flags_removed)
79008bdd 370 log_link_debug(link,
6a7a4e4d 371 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 372 unknown_flags_removed);
373 }
374
375 link->flags = flags;
376 link->kernel_operstate = operstate;
377
959f65d3 378 link_update_operstate(link, true);
51d18171
TG		 379
380 return 0;
381}
382
1c4baffc 383static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 384 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 385 const char *ifname, *kind = NULL;
b710e6b6 386 unsigned short iftype;
572b21d9
YW		 387 int r, ifindex;
388 uint16_t type;
f579559b 389
0c2f9b84 390 assert(manager);
505f8da7 391 assert(message);
f579559b
TG		 392 assert(ret);
393
6cad256d
TJ		 394 /* check for link kind */
395 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
396 if (r == 0) {
db2f8a2e 397 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 398 r = sd_netlink_message_exit_container(message);
399 if (r < 0)
400 return r;
401 }
402
1c4baffc 403 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 404 if (r < 0)
405 return r;
406 else if (type != RTM_NEWLINK)
407 return -EINVAL;
408
409 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
410 if (r < 0)
411 return r;
412 else if (ifindex <= 0)
413 return -EINVAL;
414
b710e6b6
LP		 415 r = sd_rtnl_message_link_get_type(message, &iftype);
416 if (r < 0)
417 return r;
418
1c4baffc 419 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 420 if (r < 0)
421 return r;
422
17f9c355 423 link = new(Link, 1);
f579559b
TG		 424 if (!link)
425 return -ENOMEM;
426
17f9c355
YW		 427 *link = (Link) {
428 .n_ref = 1,
429 .manager = manager,
430 .state = LINK_STATE_PENDING,
17f9c355
YW		 431 .ifindex = ifindex,
432 .iftype = iftype,
15761549 433
f5fbe71d 434 .n_dns = UINT_MAX,
15761549
YW		 435 .dns_default_route = -1,
436 .llmnr = _RESOLVE_SUPPORT_INVALID,
437 .mdns = _RESOLVE_SUPPORT_INVALID,
438 .dnssec_mode = _DNSSEC_MODE_INVALID,
439 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 440 };
441
505f8da7
TG		 442 link->ifname = strdup(ifname);
443 if (!link->ifname)
444 return -ENOMEM;
f579559b 445
6cad256d
TJ		 446 if (kind) {
447 link->kind = strdup(kind);
448 if (!link->kind)
449 return -ENOMEM;
450 }
451
cbff7170
TJ		 452 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
453 if (r < 0)
454 log_link_debug_errno(link, r, "New device has no master, continuing without");
455
b8162cd2 456 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 457 if (r < 0)
b8162cd2 458 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 459
14b66dbc
TR		 460 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
461 if (r < 0)
462 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
463
c643bda5 464 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 465 if (r < 0)
466 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
467
c643bda5
YW		 468 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
469 if (r < 0)
470 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
471
572b21d9
YW		 472 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
473 if (r < 0 && r != -ENODATA)
474 return r;
475
34437b4f 476 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 477 return -ENOMEM;
fe8db0c5 478
34437b4f 479 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 480 return -ENOMEM;
481
34437b4f 482 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 483 return -ENOMEM;
484
967d72ed 485 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 486 if (r < 0)
487 return r;
488
bb262ef0 489 r = link_update_flags(link, message, false);
51d18171
TG		 490 if (r < 0)
491 return r;
492
1cc6c93a 493 *ret = TAKE_PTR(link);
f579559b
TG		 494
495 return 0;
496}
497
15761549
YW		 498void link_ntp_settings_clear(Link *link) {
499 link->ntp = strv_free(link->ntp);
500}
501
502void link_dns_settings_clear(Link *link) {
f5fbe71d 503 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 504 for (unsigned i = 0; i < link->n_dns; i++)
505 in_addr_full_free(link->dns[i]);
15761549 506 link->dns = mfree(link->dns);
f5fbe71d 507 link->n_dns = UINT_MAX;
15761549 508
6e4571f0
YW		 509 link->search_domains = ordered_set_free(link->search_domains);
510 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 511
512 link->dns_default_route = -1;
513 link->llmnr = _RESOLVE_SUPPORT_INVALID;
514 link->mdns = _RESOLVE_SUPPORT_INVALID;
515 link->dnssec_mode = _DNSSEC_MODE_INVALID;
516 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
517
518 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
519}
520
1a6bb31f
YW		 521static void link_free_engines(Link *link) {
522 if (!link)
523 return;
524
525 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
526 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
527 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 528 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 529
530 link->lldp = sd_lldp_unref(link->lldp);
1c494872 531 link_lldp_emit_stop(link);
1a6bb31f
YW		 532
533 ndisc_flush(link);
534
535 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
536 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 537 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 538 link->ndisc = sd_ndisc_unref(link->ndisc);
539 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 540
541 ipv4_dad_unref(link);
1a6bb31f
YW		 542}
543
8301aa0b 544static Link *link_free(Link *link) {
8301aa0b 545 assert(link);
f579559b 546
15761549
YW		 547 link_ntp_settings_clear(link);
548 link_dns_settings_clear(link);
549
8eec0b9d
YW		 550 link->routes = set_free(link->routes);
551 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 552 link->dhcp_routes = set_free(link->dhcp_routes);
553 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 554 link->dhcp6_routes = set_free(link->dhcp6_routes);
555 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
556 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
557 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 558 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 559
8eec0b9d
YW		 560 link->nexthops = set_free(link->nexthops);
561 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 562
8eec0b9d
YW		 563 link->neighbors = set_free(link->neighbors);
564 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 565
8eec0b9d
YW		 566 link->addresses = set_free(link->addresses);
567 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 568 link->pool_addresses = set_free(link->pool_addresses);
e5526518 569 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 570 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
571 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
572 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
573 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 574 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 575
4b409e85
YW		 576 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
577
1a6bb31f 578 link_free_engines(link);
49699bac 579
c166a070 580 free(link->ifname);
572b21d9 581 strv_free(link->alternative_names);
ceac4078 582 free(link->kind);
8d968fdd 583 free(link->ssid);
c643bda5 584 free(link->driver);
6cad256d 585
a34e58d4
YW		 586 unlink_and_free(link->lease_file);
587 unlink_and_free(link->lldp_file);
588 unlink_and_free(link->state_file);
c166a070 589
51517f9e 590 sd_device_unref(link->sd_device);
b5db00e5 591
0d4ad91d 592 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 593 hashmap_free(link->bound_by_links);
594
5f707e12 595 set_free_with_destructor(link->slaves, link_unref);
033295c1 596
c9c908a6
YW		 597 network_unref(link->network);
598
8301aa0b 599 return mfree(link);
14b746f7
TG		 600}
601
8301aa0b 602DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 603
11a7f229
TG		 604int link_get(Manager *m, int ifindex, Link **ret) {
605 Link *link;
11a7f229
TG		 606
607 assert(m);
e856ed00 608 assert(ifindex > 0);
11a7f229
TG		 609 assert(ret);
610
ae06ab10 611 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 612 if (!link)
613 return -ENODEV;
614
615 *ret = link;
616
617 return 0;
618}
619
af9ba57a 620void link_set_state(Link *link, LinkState state) {
e331e246
TG		 621 assert(link);
622
623 if (link->state == state)
624 return;
625
0beb9542
YW		 626 log_link_debug(link, "State changed: %s -> %s",
627 link_state_to_string(link->state),
628 link_state_to_string(state));
629
e331e246
TG		 630 link->state = state;
631
632 link_send_changed(link, "AdministrativeState", NULL);
9092113d 633 link_dirty(link);
e331e246
TG		 634}
635
57bd6899
TG		 636static void link_enter_unmanaged(Link *link) {
637 assert(link);
638
e331e246 639 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 640}
641
2a99eed0 642int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 643 int r = 0, k;
644
645 assert(link);
646 assert(link->manager);
647 assert(link->manager->event);
648
80060352
ZJS		 649 bool keep_dhcp = may_keep_dhcp &&
650 link->network &&
651 (link->manager->restarting ||
652 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
653
84add3cd 654 if (!keep_dhcp) {
111bb8f9 655 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 656 if (k < 0)
36c7d709 657 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 658 }
659
84add3cd
YW		 660 k = sd_ipv4acd_stop(link->dhcp_acd);
661 if (k < 0)
662 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 663
2a99eed0
YW		 664 k = sd_dhcp_server_stop(link->dhcp_server);
665 if (k < 0)
666 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
667
9cc65242
YW		 668 k = sd_lldp_stop(link->lldp);
669 if (k < 0)
670 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
671
84add3cd
YW		 672 k = sd_ipv4ll_stop(link->ipv4ll);
673 if (k < 0)
674 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 675
490ccbd5 676 k = ipv4_dad_stop(link);
2488e4d9
YW		 677 if (k < 0)
678 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 679
84add3cd
YW		 680 k = sd_dhcp6_client_stop(link->dhcp6_client);
681 if (k < 0)
682 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 683
2ffd6d73
YW		 684 k = dhcp6_pd_remove(link);
685 if (k < 0)
686 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 687
84add3cd
YW		 688 k = sd_ndisc_stop(link->ndisc);
689 if (k < 0)
690 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 691
84add3cd
YW		 692 k = sd_radv_stop(link->radv);
693 if (k < 0)
694 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 695
7272b25e 696 link_lldp_emit_stop(link);
111bb8f9
TG		 697 return r;
698}
699
b22d8a00 700void link_enter_failed(Link *link) {
ef1ba606 701 assert(link);
f882c247 702
370e9930 703 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 704 return;
705
6a7a4e4d 706 log_link_warning(link, "Failed");
449f7554 707
e331e246 708 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 709
2a99eed0 710 (void) link_stop_engines(link, false);
f882c247
TG		 711}
712
7033af49
YW		 713static int link_join_netdevs_after_configured(Link *link) {
714 NetDev *netdev;
7033af49
YW		 715 int r;
716
90e74a66 717 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 718 if (netdev->ifindex > 0)
719 /* Assume already enslaved. */
720 continue;
721
722 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
723 continue;
724
725 log_struct(LOG_DEBUG,
726 LOG_LINK_INTERFACE(link),
727 LOG_NETDEV_INTERFACE(netdev),
728 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
729
730 r = netdev_join(netdev, link, NULL);
731 if (r < 0)
732 return log_struct_errno(LOG_WARNING, r,
733 LOG_LINK_INTERFACE(link),
734 LOG_NETDEV_INTERFACE(netdev),
735 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
736 }
737
738 return 0;
739}
740
e3a7b048 741static void link_enter_configured(Link *link) {
dd43110f
TG		 742 assert(link);
743 assert(link->network);
e3a7b048 744
289e6774 745 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 746 return;
dd43110f 747
e331e246 748 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 749
7033af49 750 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 751}
752
6accfd31
DA		 753void link_check_ready(Link *link) {
754 Address *a;
6accfd31
DA		 755
756 assert(link);
757
5f58af25
YW		 758 if (link->state == LINK_STATE_CONFIGURED)
759 return;
760
d19b9939
YW		 761 if (link->state != LINK_STATE_CONFIGURING)
762 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 763
764 if (!link->network)
765 return;
766
600b7898
YW		 767 if (link->iftype == ARPHRD_CAN) {
768 /* let's shortcut things for CAN which doesn't need most of checks below. */
769 if (!link->can_configured)
770 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
771
772 link_enter_configured(link);
773 return;
774 }
775
d19b9939
YW		 776 if (!link->addresses_configured)
777 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 778
d19b9939
YW		 779 if (!link->neighbors_configured)
780 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 781
90e74a66 782 SET_FOREACH(a, link->addresses)
39373cb9
YW		 783 if (!address_is_ready(a)) {
784 _cleanup_free_ char *str = NULL;
785
5380707a
YW		 786 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
787 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 788 }
6aa5773b 789
d19b9939
YW		 790 if (!link->static_routes_configured)
791 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 792
d19b9939
YW		 793 if (!link->static_nexthops_configured)
794 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 795
d19b9939
YW		 796 if (!link->routing_policy_rules_configured)
797 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 798
d19b9939
YW		 799 if (!link->tc_configured)
800 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 801
d19b9939
YW		 802 if (!link->sr_iov_configured)
803 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 804
d19b9939
YW		 805 if (!link->bridge_mdb_configured)
806 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 807
463797c1 808 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 809 bool has_ndisc_address = false;
810 NDiscAddress *n;
6accfd31 811
94876904
YW		 812 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
813 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 814
90e74a66 815 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 816 if (!n->marked) {
817 has_ndisc_address = true;
818 break;
819 }
820
8cd37e43 821 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 822 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 823 !link->ipv4ll_address_configured)
824 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
825 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 826
0d0799da
YW		 827 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
828 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 829 if (!link->dhcp4_configured &&
830 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
831 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 832 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 833 !link->ipv4ll_address_configured)
834 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 835 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 836
0d0799da 837 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		 838 __func__,
839 yes_no(link->dhcp4_configured),
0d0799da 840 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 841 yes_no(link->dhcp6_address_configured),
842 yes_no(link->dhcp6_route_configured),
843 yes_no(link->dhcp6_pd_address_configured),
844 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 845 yes_no(link->ndisc_addresses_configured),
846 yes_no(link->ndisc_routes_configured));
39373cb9 847 }
463797c1 848 }
6accfd31 849
5f58af25 850 link_enter_configured(link);
6accfd31
DA		 851}
852
682c65b0 853static int link_set_static_configs(Link *link) {
f882c247
TG		 854 int r;
855
856 assert(link);
857 assert(link->network);
f5be5601 858 assert(link->state != _LINK_STATE_INVALID);
f882c247 859
2428613f 860 /* Reset all *_configured flags we are configuring. */
9b966cee 861 link->request_static_addresses = false;
2428613f 862 link->addresses_configured = false;
6aa5773b 863 link->addresses_ready = false;
2428613f
YW		 864 link->neighbors_configured = false;
865 link->static_routes_configured = false;
c16c7808 866 link->static_nexthops_configured = false;
2428613f
YW		 867 link->routing_policy_rules_configured = false;
868
f6bb7ac5
TJ		 869 r = link_set_bridge_fdb(link);
870 if (r < 0)
871 return r;
872
1f241589
YW		 873 r = link_set_bridge_mdb(link);
874 if (r < 0)
875 return r;
876
58f1fe9a 877 r = link_set_neighbors(link);
f3ef324d
YW		 878 if (r < 0)
879 return r;
e4a71bf3 880
682c65b0
YW		 881 r = link_set_addresses(link);
882 if (r < 0)
883 return r;
bd6379ec 884
fe2bc17c
YW		 885 r = link_set_address_labels(link);
886 if (r < 0)
887 return r;
f882c247 888
e5526518 889 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 890 r = dhcp4_server_configure(link);
891 if (r < 0)
892 return r;
d4cdbea5 893
f882c247
TG		 894 return 0;
895}
896
3a390124 897static int link_configure_continue(Link *link);
55dc8c4a 898
e16e4b3b
DS		 899static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
900 int r;
901
902 assert(link);
903
904 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
905 return 1;
906
907 r = sd_netlink_message_get_errno(m);
908 if (r < 0)
909 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
910 else
911 log_link_debug(link, "Setting MAC address done.");
912
913 return 1;
914}
915
916static int link_set_mac(Link *link) {
917 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
918 int r;
919
920 assert(link);
921 assert(link->network);
922 assert(link->manager);
923 assert(link->manager->rtnl);
924
925 if (!link->network->mac)
926 return 0;
927
928 log_link_debug(link, "Setting MAC address");
929
930 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
931 if (r < 0)
932 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
933
934 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
935 if (r < 0)
936 return log_link_error_errno(link, r, "Could not set MAC address: %m");
937
938 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
939 link_netlink_destroy_callback, link);
940 if (r < 0)
941 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
942
943 link_ref(link);
944
945 return 0;
946}
947
948static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
949 int r;
950
951 assert(link);
952
953 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
954 return 1;
955
956 r = sd_netlink_message_get_errno(m);
957 if (r < 0)
958 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
959 else
960 log_link_debug(link, "Setting nomaster done.");
961
962 return 1;
963}
964
965static int link_set_nomaster(Link *link) {
966 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
967 int r;
968
969 assert(link);
970 assert(link->network);
971 assert(link->manager);
972 assert(link->manager->rtnl);
973
974 /* set it free if not enslaved with networkd */
c0267a59 975 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 976 return 0;
977
978 log_link_debug(link, "Setting nomaster");
979
980 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
981 if (r < 0)
982 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
983
984 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
985 if (r < 0)
986 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
987
988 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
989 link_netlink_destroy_callback, link);
990 if (r < 0)
991 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
992
993 link_ref(link);
994
995 return 0;
996}
997
302a796f 998static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 999 int r;
1000
1001 assert(m);
1002 assert(link);
1003 assert(link->ifname);
1004
55dc8c4a
YW		 1005 link->setting_mtu = false;
1006
5da8149f 1007 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1008 return 1;
1009
1c4baffc 1010 r = sd_netlink_message_get_errno(m);
4ff296b0 1011 if (r < 0)
5ecb131d 1012 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1013 else
1014 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1015
4ff296b0 1016 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1017 r = link_configure_continue(link);
4ff296b0
YW		 1018 if (r < 0)
1019 link_enter_failed(link);
1020 }
4f882b2a
TG		 1021
1022 return 1;
1023}
1024
933c70a0 1025int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1026 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1027 int r;
1028
1029 assert(link);
1030 assert(link->manager);
1031 assert(link->manager->rtnl);
1032
40288ece
YW		 1033 if (mtu == 0 || link->setting_mtu)
1034 return 0;
1035
933c70a0 1036 if (link->mtu == mtu)
ee493106
YW		 1037 return 0;
1038
6a7a4e4d 1039 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1040
6a7a4e4d
LP		 1041 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1042 if (r < 0)
1043 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1044
44b598a1 1045 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1046 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1047 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1048
1049 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1050 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1051
72c2500b 1052 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1053 }
1054
1c4baffc 1055 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1056 if (r < 0)
1057 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1058
302a796f
YW		 1059 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1060 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1061 if (r < 0)
1062 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1063
ae941762 1064 link_ref(link);
1046bf9b 1065 link->setting_mtu = true;
b226d99b 1066
4f882b2a
TG		 1067 return 0;
1068}
1069
f6fcc1c2
YW		 1070static bool link_reduces_vlan_mtu(Link *link) {
1071 /* See netif_reduces_vlan_mtu() in kernel. */
1072 return streq_ptr(link->kind, "macsec");
1073}
1074
1075static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1076 uint32_t mtu = 0;
1077 NetDev *dev;
f6fcc1c2 1078
90e74a66 1079 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1080 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1081 /* See vlan_dev_change_mtu() in kernel. */
1082 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1083
1084 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1085 /* See macvlan_change_mtu() in kernel. */
1086 mtu = dev->mtu;
1087
1088 return mtu;
1089}
1090
1091static int link_configure_mtu(Link *link) {
1092 uint32_t mtu;
1093
1094 assert(link);
1095 assert(link->network);
1096
1097 if (link->network->mtu > 0)
1098 return link_set_mtu(link, link->network->mtu);
1099
1100 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1101 if (link->mtu >= mtu)
1102 return 0;
1103
1104 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1105 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1106 link->mtu, mtu);
1107
1108 return link_set_mtu(link, mtu);
1109}
1110
302a796f 1111static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1112 int r;
1113
1114 assert(m);
1115 assert(link);
1116 assert(link->ifname);
1117
1118 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1119 return 1;
1120
1121 r = sd_netlink_message_get_errno(m);
1122 if (r < 0)
5ecb131d 1123 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1124
1125 return 1;
1126}
1127
1128static int link_set_flags(Link *link) {
1129 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1130 unsigned ifi_change = 0;
1131 unsigned ifi_flags = 0;
1132 int r;
1133
1134 assert(link);
1135 assert(link->manager);
1136 assert(link->manager->rtnl);
1137
1138 if (link->flags & IFF_LOOPBACK)
1139 return 0;
1140
1141 if (!link->network)
1142 return 0;
1143
937e305e
SS		 1144 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1145 link->network->promiscuous < 0)
99d2baa2
SS		 1146 return 0;
1147
1148 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1149 if (r < 0)
1150 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1151
1152 if (link->network->arp >= 0) {
1153 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1154 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1155 }
1156
1157 if (link->network->multicast >= 0) {
1158 ifi_change |= IFF_MULTICAST;
1159 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1160 }
1161
866e6b7a
SS		 1162 if (link->network->allmulticast >= 0) {
1163 ifi_change |= IFF_ALLMULTI;
1164 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1165 }
1166
937e305e
SS		 1167 if (link->network->promiscuous >= 0) {
1168 ifi_change |= IFF_PROMISC;
1169 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1170 }
1171
99d2baa2
SS		 1172 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1173 if (r < 0)
1174 return log_link_error_errno(link, r, "Could not set link flags: %m");
1175
302a796f
YW		 1176 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1177 link_netlink_destroy_callback, link);
99d2baa2
SS		 1178 if (r < 0)
1179 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1180
1181 link_ref(link);
1182
1183 return 0;
1184}
1185
e7ab854c
TG		 1186static int link_acquire_ipv6_conf(Link *link) {
1187 int r;
1188
1189 assert(link);
1190
086b8853 1191 if (link->radv) {
7465dd22 1192 assert(link->radv);
94876904 1193 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1194
1195 log_link_debug(link, "Starting IPv6 Router Advertisements");
1196
fd3ef936
YW		 1197 r = radv_emit_dns(link);
1198 if (r < 0)
1199 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1200
7465dd22
PF		 1201 r = sd_radv_start(link->radv);
1202 if (r < 0 && r != -EBUSY)
1203 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1204 }
1205
294f129b
YW		 1206 r = ndisc_start(link);
1207 if (r < 0)
1208 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 1209
294f129b
YW		 1210 r = dhcp6_start(link);
1211 if (r < 0)
1212 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 1213
1633c457
YW		 1214 r = dhcp6_request_prefix_delegation(link);
1215 if (r < 0)
1216 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1217
e7ab854c
TG		 1218 return 0;
1219}
1220
6fc25497 1221static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1222 int r;
1223
1224 assert(link);
ff254138
TG		 1225 assert(link->manager);
1226 assert(link->manager->event);
1227
0107b769 1228 if (link->dhcp_client) {
294f129b 1229 r = dhcp4_start(link);
0107b769 1230 if (r < 0)
294f129b 1231 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 1232
0b4b66cc 1233 } else if (link->ipv4ll) {
6a7a4e4d 1234 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1235
1236 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1237 if (r < 0)
1238 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1239 }
1240
6fc25497
SS		 1241 return 0;
1242}
1243
1244static int link_acquire_conf(Link *link) {
1245 int r;
1246
1247 assert(link);
1248
1249 r = link_acquire_ipv4_conf(link);
1250 if (r < 0)
1251 return r;
1252
94876904 1253 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1254 r = link_acquire_ipv6_conf(link);
1255 if (r < 0)
1256 return r;
1257 }
1258
2ffd6d73
YW		 1259 r = link_lldp_emit_start(link);
1260 if (r < 0)
1261 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1262
ff254138
TG		 1263 return 0;
1264}
1265
a61bb41c 1266bool link_has_carrier(Link *link) {
deb2e523
TG		 1267 /* see Documentation/networking/operstates.txt in the kernel sources */
1268
a61bb41c 1269 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1270 return true;
1271
a61bb41c 1272 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1273 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1274 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1275 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1276 return true;
1277
1278 return false;
1279}
1280
0e2fdb83
SS		 1281static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1282 int r;
1283
1284 assert(link);
1285
9524014e
DS		 1286 link->setting_genmode = false;
1287
0e2fdb83
SS		 1288 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1289 return 1;
1290
1291 r = sd_netlink_message_get_errno(m);
1292 if (r < 0)
5ecb131d 1293 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1294 else
1295 log_link_debug(link, "Setting address genmode done.");
1296
1297 if (link->state == LINK_STATE_INITIALIZED) {
1298 r = link_configure_continue(link);
1299 if (r < 0)
1300 link_enter_failed(link);
1301 }
0e2fdb83
SS		 1302
1303 return 1;
1304}
1305
1306static int link_configure_addrgen_mode(Link *link) {
1307 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1308 uint8_t ipv6ll_mode;
1309 int r;
1310
1311 assert(link);
1312 assert(link->network);
1313 assert(link->manager);
1314 assert(link->manager->rtnl);
1315
9524014e 1316 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1317 return 0;
1318
0e2fdb83
SS		 1319 log_link_debug(link, "Setting address genmode for link");
1320
1321 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1322 if (r < 0)
1323 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1324
1325 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1326 if (r < 0)
1327 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1328
1329 r = sd_netlink_message_open_container(req, AF_INET6);
1330 if (r < 0)
1331 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1332
1333 if (!link_ipv6ll_enabled(link))
1334 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1335 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1336 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1337 if (r < 0) {
1338 /* The file may not exist. And even if it exists, when stable_secret is unset,
0e275271
YW		 1339 * reading the file fails with ENOMEM when read_full_virtual_file(), which uses
1340 * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
1341 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
a6f1848a
SS		 1342
1343 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1344 } else
1345 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1346 } else
6f6296b9 1347 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1348
1349 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1350 if (r < 0)
1351 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1352
1353 r = sd_netlink_message_close_container(req);
1354 if (r < 0)
1355 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1356
1357 r = sd_netlink_message_close_container(req);
1358 if (r < 0)
1359 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1360
1361 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1362 link_netlink_destroy_callback, link);
1363 if (r < 0)
1364 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1365
1366 link_ref(link);
9524014e 1367 link->setting_genmode = true;
0e2fdb83
SS		 1368
1369 return 0;
1370}
1371
302a796f 1372static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1373 int r;
1374
1746cf2a
TG		 1375 assert(link);
1376
5da8149f 1377 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1378 return 1;
1379
1c4baffc 1380 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1381 if (r < 0)
26d6b214 1382 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1383 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1384
f882c247
TG		 1385 return 1;
1386}
1387
f282ce20 1388int link_up(Link *link) {
4afd3348 1389 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1390 int r;
1391
f882c247 1392 assert(link);
c106cc36 1393 assert(link->network);
f882c247
TG		 1394 assert(link->manager);
1395 assert(link->manager->rtnl);
1396
6a7a4e4d 1397 log_link_debug(link, "Bringing link up");
449f7554 1398
6a7a4e4d
LP		 1399 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1400 if (r < 0)
1401 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1402
5d4795f3 1403 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1404 if (r < 0)
1405 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1406
302a796f
YW		 1407 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1408 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1409 if (r < 0)
1410 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1411
b226d99b
TG		 1412 link_ref(link);
1413
f882c247
TG		 1414 return 0;
1415}
1416
302a796f 1417static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1418 int r;
1419
1420 assert(link);
1421
1422 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1423 return 1;
1424
1c4baffc 1425 r = sd_netlink_message_get_errno(m);
0d4ad91d 1426 if (r < 0)
5ecb131d 1427 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1428
1429 return 1;
1430}
1431
8e54db83 1432int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1433 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1434 int r;
1435
1436 assert(link);
1437 assert(link->manager);
1438 assert(link->manager->rtnl);
1439
6a7a4e4d 1440 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1441
1442 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1443 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1444 if (r < 0)
1445 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1446
1447 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1448 if (r < 0)
1449 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1450
8e54db83
YW		 1451 r = netlink_call_async(link->manager->rtnl, NULL, req,
1452 callback ?: link_down_handler,
302a796f 1453 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1454 if (r < 0)
1455 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1456
1457 link_ref(link);
1458
1459 return 0;
1460}
1461
89fe6535
SS		 1462static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1463 int r;
1464
1465 assert(link);
1466
1467 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1468 return 1;
1469
1470 r = sd_netlink_message_get_errno(m);
1471 if (r < 0)
1472 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1473
1474 return 1;
1475}
1476
1477static int link_set_group(Link *link) {
1478 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1479 int r;
1480
1481 assert(link);
1482 assert(link->network);
1483 assert(link->manager);
1484 assert(link->manager->rtnl);
1485
1486 if (link->network->group <= 0)
1487 return 0;
1488
1489 log_link_debug(link, "Setting group");
1490
1491 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1492 if (r < 0)
1493 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1494
1495 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1496 if (r < 0)
1497 return log_link_error_errno(link, r, "Could not set link group: %m");
1498
1499 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1500 link_netlink_destroy_callback, link);
1501 if (r < 0)
1502 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1503
1504 link_ref(link);
1505
1506 return 0;
1507}
1508
0d4ad91d
AR		 1509static int link_handle_bound_to_list(Link *link) {
1510 Link *l;
0d4ad91d
AR		 1511 int r;
1512 bool required_up = false;
1513 bool link_is_up = false;
1514
1515 assert(link);
1516
1517 if (hashmap_isempty(link->bound_to_links))
1518 return 0;
1519
1520 if (link->flags & IFF_UP)
1521 link_is_up = true;
1522
90e74a66 1523 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1524 if (link_has_carrier(l)) {
1525 required_up = true;
1526 break;
1527 }
1528
1529 if (!required_up && link_is_up) {
8e54db83 1530 r = link_down(link, NULL);
0d4ad91d
AR		 1531 if (r < 0)
1532 return r;
1533 } else if (required_up && !link_is_up) {
1534 r = link_up(link);
1535 if (r < 0)
1536 return r;
1537 }
1538
1539 return 0;
1540}
1541
1542static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1543 Link *l;
1544 int r;
1545
1546 assert(link);
1547
1548 if (hashmap_isempty(link->bound_by_links))
1549 return 0;
1550
90e74a66 1551 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1552 r = link_handle_bound_to_list(l);
1553 if (r < 0)
1554 return r;
1555 }
1556
1557 return 0;
1558}
1559
1560static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1561 int r;
1562
1563 assert(link);
1564 assert(carrier);
1565
1566 if (link == carrier)
1567 return 0;
1568
1569 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1570 return 0;
1571
190b3b5c 1572 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1573 if (r < 0)
1574 return r;
1575
9092113d
YW		 1576 link_dirty(link);
1577
0d4ad91d
AR		 1578 return 0;
1579}
1580
1581static int link_new_bound_by_list(Link *link) {
1582 Manager *m;
1583 Link *carrier;
0d4ad91d 1584 int r;
0d4ad91d
AR		 1585
1586 assert(link);
1587 assert(link->manager);
1588
1589 m = link->manager;
1590
90e74a66 1591 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1592 if (!carrier->network)
1593 continue;
1594
1595 if (strv_isempty(carrier->network->bind_carrier))
1596 continue;
1597
191a3f16 1598 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1599 r = link_put_carrier(link, carrier, &link->bound_by_links);
1600 if (r < 0)
1601 return r;
0d4ad91d
AR		 1602 }
1603 }
1604
90e74a66 1605 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1606 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1607 if (r < 0)
1608 return r;
0d4ad91d
AR		 1609 }
1610
1611 return 0;
1612}
1613
1614static int link_new_bound_to_list(Link *link) {
1615 Manager *m;
1616 Link *carrier;
0d4ad91d 1617 int r;
0d4ad91d
AR		 1618
1619 assert(link);
1620 assert(link->manager);
1621
1622 if (!link->network)
1623 return 0;
1624
1625 if (strv_isempty(link->network->bind_carrier))
1626 return 0;
1627
1628 m = link->manager;
1629
90e74a66 1630 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1631 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1632 r = link_put_carrier(link, carrier, &link->bound_to_links);
1633 if (r < 0)
1634 return r;
0d4ad91d
AR		 1635 }
1636 }
1637
90e74a66 1638 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1639 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1640 if (r < 0)
1641 return r;
0d4ad91d
AR		 1642 }
1643
1644 return 0;
1645}
1646
1647static int link_new_carrier_maps(Link *link) {
1648 int r;
1649
1650 r = link_new_bound_by_list(link);
1651 if (r < 0)
1652 return r;
1653
1654 r = link_handle_bound_by_list(link);
1655 if (r < 0)
1656 return r;
1657
1658 r = link_new_bound_to_list(link);
1659 if (r < 0)
1660 return r;
1661
1662 r = link_handle_bound_to_list(link);
1663 if (r < 0)
1664 return r;
1665
1666 return 0;
1667}
1668
1669static void link_free_bound_to_list(Link *link) {
9092113d 1670 bool updated = false;
0d4ad91d 1671 Link *bound_to;
0d4ad91d 1672
9092113d
YW		 1673 assert(link);
1674
1675 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1676 updated = true;
0d4ad91d
AR		 1677
1678 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1679 link_dirty(bound_to);
0d4ad91d
AR		 1680 }
1681
9092113d
YW		 1682 if (updated)
1683 link_dirty(link);
1684
0d4ad91d
AR		 1685 return;
1686}
1687
1688static void link_free_bound_by_list(Link *link) {
9092113d 1689 bool updated = false;
0d4ad91d 1690 Link *bound_by;
0d4ad91d 1691
9092113d
YW		 1692 assert(link);
1693
1694 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1695 updated = true;
0d4ad91d
AR		 1696
1697 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1698 link_dirty(bound_by);
0d4ad91d
AR		 1699 link_handle_bound_to_list(bound_by);
1700 }
1701 }
1702
9092113d
YW		 1703 if (updated)
1704 link_dirty(link);
1705
0d4ad91d
AR		 1706 return;
1707}
1708
1709static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1710 assert(link);
1711
9092113d
YW		 1712 link_free_bound_to_list(link);
1713 link_free_bound_by_list(link);
0d4ad91d
AR		 1714
1715 return;
1716}
1717
5f707e12
YW		 1718static int link_append_to_master(Link *link, NetDev *netdev) {
1719 Link *master;
1720 int r;
1721
1722 assert(link);
1723 assert(netdev);
1724
1725 r = link_get(link->manager, netdev->ifindex, &master);
1726 if (r < 0)
1727 return r;
1728
de7fef4b 1729 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1730 if (r <= 0)
5f707e12
YW		 1731 return r;
1732
1733 link_ref(link);
1734 return 0;
1735}
1736
1737static void link_drop_from_master(Link *link, NetDev *netdev) {
1738 Link *master;
1739
1740 assert(link);
1741
1742 if (!link->manager || !netdev)
1743 return;
1744
1745 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1746 return;
1747
1748 link_unref(set_remove(master->slaves, link));
1749}
1750
1751static void link_detach_from_manager(Link *link) {
1752 if (!link || !link->manager)
1753 return;
1754
1755 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1756 link_clean(link);
1757
1758 /* The following must be called at last. */
1759 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1760 link_unref(link);
1761}
1762
3be9d62a 1763static void link_drop(Link *link) {
0d4ad91d
AR		 1764 if (!link || link->state == LINK_STATE_LINGER)
1765 return;
1766
1767 link_set_state(link, LINK_STATE_LINGER);
1768
1769 link_free_carrier_maps(link);
1770
5f707e12 1771 if (link->network) {
c0267a59 1772 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1773 link_drop_from_master(link, link->network->bridge);
1774 link_drop_from_master(link, link->network->bond);
1775 }
1776
6a7a4e4d 1777 log_link_debug(link, "Link removed");
0d4ad91d 1778
db2f8a2e 1779 (void) unlink(link->state_file);
c4397d94 1780 link_detach_from_manager(link);
0d4ad91d
AR		 1781}
1782
04952b25 1783int link_activate(Link *link) {
f882c247
TG		 1784 int r;
1785
ef1ba606 1786 assert(link);
f5be5601 1787 assert(link->network);
dd3efc09 1788
61135582
DS		 1789 switch (link->network->activation_policy) {
1790 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1791 r = link_handle_bound_to_list(link);
1792 if (r < 0)
1793 return r;
61135582
DS		 1794 break;
1795 case ACTIVATION_POLICY_UP:
1796 if (link->activated)
1797 break;
1798 _fallthrough_;
1799 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1800 r = link_up(link);
04952b25 1801 if (r < 0)
505f8da7 1802 return r;
61135582
DS		 1803 break;
1804 case ACTIVATION_POLICY_DOWN:
1805 if (link->activated)
1806 break;
1807 _fallthrough_;
1808 case ACTIVATION_POLICY_ALWAYS_DOWN:
1809 r = link_down(link, NULL);
04952b25 1810 if (r < 0)
61135582 1811 return r;
61135582
DS		 1812 break;
1813 default:
1814 break;
ef1ba606 1815 }
61135582 1816 link->activated = true;
f882c247 1817
04952b25
YW		 1818 return 0;
1819}
1820
1821static int link_joined(Link *link) {
1822 int r;
1823
1824 assert(link);
1825 assert(link->network);
1826
1827 r = link_activate(link);
1828 if (r < 0)
1829 return r;
1830
9ed794a3 1831 if (link->network->bridge) {
e1853b00 1832 r = link_set_bridge(link);
6a7a4e4d
LP		 1833 if (r < 0)
1834 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1835
1836 r = link_append_to_master(link, link->network->bridge);
1837 if (r < 0)
1838 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1839 }
1840
eb64b435 1841 if (link->network->bond) {
7fcee284 1842 r = link_set_bond(link);
eb64b435
SS		 1843 if (r < 0)
1844 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1845
45e11abf 1846 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1847 if (r < 0)
1848 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1849 }
1850
34d7f2c9
YW		 1851 r = link_set_bridge_vlan(link);
1852 if (r < 0)
1853 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1854
c1835a42
RM		 1855 /* Skip setting up addresses until it gets carrier,
1856 or it would try to set addresses twice,
1857 which is bad for non-idempotent steps. */
dad2d78e 1858 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1859 return 0;
1860
b425c3ae 1861 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1862
1863 r = link_acquire_conf(link);
1864 if (r < 0)
1865 return r;
1866
682c65b0 1867 return link_set_static_configs(link);
02b59d57
TG		 1868}
1869
302a796f 1870static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1871 int r;
1872
1746cf2a 1873 assert(link);
ef1ba606 1874 assert(link->network);
34bf3c00 1875 assert(link->enslaving > 0);
02b59d57 1876
313cefa1 1877 link->enslaving--;
52433f6b 1878
5da8149f 1879 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1880 return 1;
1881
1c4baffc 1882 r = sd_netlink_message_get_errno(m);
856f962c 1883 if (r < 0 && r != -EEXIST) {
5ecb131d 1884 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1885 link_enter_failed(link);
1886 return 1;
4ff296b0
YW		 1887 }
1888
1889 log_link_debug(link, "Joined netdev");
02b59d57 1890
34bf3c00 1891 if (link->enslaving == 0) {
4ff296b0
YW		 1892 r = link_joined(link);
1893 if (r < 0)
1894 link_enter_failed(link);
34bf3c00 1895 }
02b59d57
TG		 1896
1897 return 1;
1898}
1899
3f265037 1900static int link_enter_join_netdev(Link *link) {
6a0a2f86 1901 NetDev *netdev;
02b59d57
TG		 1902 int r;
1903
1904 assert(link);
1905 assert(link->network);
bd08ce56 1906 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1907
289e6774 1908 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1909
34bf3c00 1910 link->enslaving = 0;
02b59d57 1911
d9c67ea1 1912 if (link->network->bond) {
cbff7170
TJ		 1913 if (link->network->bond->state == NETDEV_STATE_READY &&
1914 link->network->bond->ifindex == link->master_ifindex)
1915 return link_joined(link);
1916
f2341e0a
LP		 1917 log_struct(LOG_DEBUG,
1918 LOG_LINK_INTERFACE(link),
1919 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1920 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1921
34bf3c00
YW		 1922 link->enslaving++;
1923
f2341e0a 1924 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1925 if (r < 0) {
f2341e0a
LP		 1926 log_struct_errno(LOG_WARNING, r,
1927 LOG_LINK_INTERFACE(link),
1928 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1929 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1930 link_enter_failed(link);
1931 return r;
c0267a59
AW		 1932 }
1933 }
1934
1935 if (link->network->batadv) {
1936 log_struct(LOG_DEBUG,
1937 LOG_LINK_INTERFACE(link),
1938 LOG_NETDEV_INTERFACE(link->network->batadv),
1939 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1940
1941 link->enslaving++;
1942
1943 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1944 if (r < 0) {
1945 log_struct_errno(LOG_WARNING, r,
1946 LOG_LINK_INTERFACE(link),
1947 LOG_NETDEV_INTERFACE(link->network->batadv),
1948 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1949 link_enter_failed(link);
1950 return r;
52433f6b 1951 }
0ad6148e
MO		 1952 }
1953
d9c67ea1 1954 if (link->network->bridge) {
f2341e0a
LP		 1955 log_struct(LOG_DEBUG,
1956 LOG_LINK_INTERFACE(link),
1957 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1958 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1959
34bf3c00
YW		 1960 link->enslaving++;
1961
f2341e0a 1962 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1963 if (r < 0) {
f2341e0a
LP		 1964 log_struct_errno(LOG_WARNING, r,
1965 LOG_LINK_INTERFACE(link),
1966 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1967 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1968 link_enter_failed(link);
1969 return r;
1970 }
52433f6b
TG		 1971 }
1972
6cb955c6
AR		 1973 if (link->network->vrf) {
1974 log_struct(LOG_DEBUG,
1975 LOG_LINK_INTERFACE(link),
1976 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1977 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1978
34bf3c00
YW		 1979 link->enslaving++;
1980
6cb955c6
AR		 1981 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1982 if (r < 0) {
1983 log_struct_errno(LOG_WARNING, r,
1984 LOG_LINK_INTERFACE(link),
1985 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1986 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1987 link_enter_failed(link);
1988 return r;
1989 }
6cb955c6
AR		 1990 }
1991
90e74a66 1992 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1993
2b6db913
YW		 1994 if (netdev->ifindex > 0)
1995 /* Assume already enslaved. */
a63e5daa 1996 continue;
a63e5daa 1997
7033af49
YW		 1998 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
1999 continue;
2000
f2341e0a
LP		 2001 log_struct(LOG_DEBUG,
2002 LOG_LINK_INTERFACE(link),
2003 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2004 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2005
34bf3c00
YW		 2006 link->enslaving++;
2007
f2341e0a 2008 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2009 if (r < 0) {
f2341e0a
LP		 2010 log_struct_errno(LOG_WARNING, r,
2011 LOG_LINK_INTERFACE(link),
2012 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2013 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2014 link_enter_failed(link);
2015 return r;
2016 }
326cb406
SS		 2017 }
2018
34bf3c00
YW		 2019 if (link->enslaving == 0)
2020 return link_joined(link);
2021
ef1ba606
TG		 2022 return 0;
2023}
2024
5e5b137a 2025static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2026 int k, r;
2027
2028 assert(link);
2029 assert(link->manager);
5e5b137a 2030
e36d601c 2031 r = link_drop_foreign_routes(link);
5e5b137a 2032
e36d601c 2033 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2034 if (k < 0 && r >= 0)
2035 r = k;
2036
e36d601c 2037 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2038 if (k < 0 && r >= 0)
2039 r = k;
d1bdafd2 2040
e36d601c 2041 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2042 if (k < 0 && r >= 0)
2043 r = k;
2044
0b81225e
YW		 2045 k = manager_drop_foreign_routing_policy_rules(link->manager);
2046 if (k < 0 && r >= 0)
2047 r = k;
2048
2049 return r;
5e5b137a
TG		 2050}
2051
3104883d 2052static int link_drop_config(Link *link) {
0b81225e
YW		 2053 int k, r;
2054
2055 assert(link);
2056 assert(link->manager);
3104883d 2057
e36d601c 2058 r = link_drop_routes(link);
3104883d 2059
e36d601c 2060 k = link_drop_nexthops(link);
0b81225e
YW		 2061 if (k < 0 && r >= 0)
2062 r = k;
d1bdafd2 2063
e36d601c 2064 k = link_drop_addresses(link);
0b81225e
YW		 2065 if (k < 0 && r >= 0)
2066 r = k;
2067
e36d601c 2068 k = link_drop_neighbors(link);
25b82b6e
YW		 2069 if (k < 0 && r >= 0)
2070 r = k;
2071
0b81225e
YW		 2072 k = manager_drop_routing_policy_rules(link->manager, link);
2073 if (k < 0 && r >= 0)
2074 r = k;
3104883d 2075
c69305ff
LP		 2076 ndisc_flush(link);
2077
0b81225e 2078 return r;
3104883d
SS		 2079}
2080
256c75fd 2081int link_configure(Link *link) {
4ecdcb07
YW		 2082 int r;
2083
ef1ba606 2084 assert(link);
b22d8a00 2085 assert(link->network);
bd08ce56 2086 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2087
34658df2 2088 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2089 if (r < 0)
2090 return r;
2091
518cd6b5
SS		 2092 r = link_configure_sr_iov(link);
2093 if (r < 0)
2094 return r;
2095
500b96eb 2096 if (link->iftype == ARPHRD_CAN)
600b7898 2097 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2098 return link_configure_can(link);
92c918b0 2099
5e0534f1 2100 r = link_set_sysctl(link);
b69c3180
SS		 2101 if (r < 0)
2102 return r;
8749cbcd 2103
e16e4b3b
DS		 2104 r = link_set_mac(link);
2105 if (r < 0)
2106 return r;
2107
2108 r = link_set_nomaster(link);
2109 if (r < 0)
2110 return r;
2111
99d2baa2
SS		 2112 r = link_set_flags(link);
2113 if (r < 0)
2114 return r;
2115
89fe6535
SS		 2116 r = link_set_group(link);
2117 if (r < 0)
2118 return r;
2119
2ffd6d73
YW		 2120 r = ipv4ll_configure(link);
2121 if (r < 0)
2122 return r;
64b21ece 2123
2ffd6d73
YW		 2124 r = dhcp4_configure(link);
2125 if (r < 0)
2126 return r;
eb34d4af 2127
2ffd6d73
YW		 2128 r = dhcp6_configure(link);
2129 if (r < 0)
2130 return r;
f5a8c43f 2131
2ffd6d73
YW		 2132 r = ndisc_configure(link);
2133 if (r < 0)
2134 return r;
4138fb2c 2135
086b8853
YW		 2136 r = radv_configure(link);
2137 if (r < 0)
2138 return r;
7465dd22 2139
2ffd6d73
YW		 2140 r = link_lldp_rx_configure(link);
2141 if (r < 0)
2142 return r;
ce43e484 2143
f6fcc1c2 2144 r = link_configure_mtu(link);
40288ece
YW		 2145 if (r < 0)
2146 return r;
44b598a1 2147
9f6e82e6
YW		 2148 r = link_configure_addrgen_mode(link);
2149 if (r < 0)
2150 return r;
0e2fdb83 2151
3a390124
DS		 2152 return link_configure_continue(link);
2153}
2154
2155/* The configuration continues in this separate function, instead of
2156 * including this in the above link_configure() function, for two
2157 * reasons:
2158 * 1) some devices reset the link when the mtu is set, which caused
2159 * an infinite loop here in networkd; see:
2160 * https://github.com/systemd/systemd/issues/6593
2161 * https://github.com/systemd/systemd/issues/9831
2162 * 2) if ipv6ll is disabled, then bringing the interface up must be
2163 * delayed until after we get confirmation from the kernel that
2164 * the addr_gen_mode parameter has been set (via netlink), see:
2165 * https://github.com/systemd/systemd/issues/13882
2166 */
2167static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2168 int r;
2169
2170 assert(link);
2171 assert(link->network);
bd08ce56 2172 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2173
9524014e 2174 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2175 return 0;
2176
4c649652
DS		 2177 /* Drop foreign config, but ignore loopback or critical devices.
2178 * We do not want to remove loopback address or addresses used for root NFS. */
2179 if (!(link->flags & IFF_LOOPBACK) &&
2180 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2181 r = link_drop_foreign_config(link);
2182 if (r < 0)
2183 return r;
2184 }
2185
d236718c
DS		 2186 /* The kernel resets ipv6 mtu after changing device mtu;
2187 * we must set this here, after we've set device mtu */
2188 r = link_set_ipv6_mtu(link);
2189 if (r < 0)
5e0534f1 2190 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2191
3f265037 2192 return link_enter_join_netdev(link);
505f8da7
TG		 2193}
2194
572b21d9 2195static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2196 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2197 Network *network;
2198 int r;
2199
8bceafa7 2200 assert(m);
572b21d9 2201
8bceafa7
YW		 2202 r = sd_netlink_message_get_errno(m);
2203 if (r < 0)
2204 return r;
572b21d9 2205
8bceafa7
YW		 2206 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2207 if (r < 0 && r != -ENODATA)
2208 return r;
572b21d9 2209
8bceafa7 2210 strv_free_and_replace(link->alternative_names, s);
572b21d9 2211
c643bda5
YW		 2212 r = network_get(link->manager, link->iftype, link->sd_device,
2213 link->ifname, link->alternative_names, link->driver,
b8162cd2 2214 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2215 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2216 if (r == -ENOENT) {
2217 link_enter_unmanaged(link);
2218 return 0;
2219 } else if (r == 0 && network->unmanaged) {
2220 link_enter_unmanaged(link);
2221 return 0;
2222 } else if (r < 0)
2223 return r;
2224
99b8517c 2225 if (link->network == network && !force)
ad932b15
YW		 2226 return 0;
2227
2228 log_link_info(link, "Re-configuring with %s", network->filename);
2229
2230 /* Dropping old .network file */
2a99eed0 2231 r = link_stop_engines(link, false);
572b21d9 2232 if (r < 0)
ad932b15 2233 return r;
ad932b15 2234
ad932b15
YW		 2235 r = link_drop_config(link);
2236 if (r < 0)
2237 return r;
2238
2c7b826d 2239 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2240 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2241 r = link_drop_foreign_config(link);
2242 if (r < 0)
2243 return r;
2244 }
2245
2246 link_free_carrier_maps(link);
2247 link_free_engines(link);
2248 link->network = network_unref(link->network);
59c31eba 2249 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2250
2251 /* Then, apply new .network file */
9092113d
YW		 2252 link->network = network_ref(network);
2253 link_dirty(link);
ad932b15
YW		 2254
2255 r = link_new_carrier_maps(link);
2256 if (r < 0)
2257 return r;
2258
2259 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2260 link->activated = false;
ad932b15 2261
ad932b15
YW		 2262 r = link_configure(link);
2263 if (r < 0)
2264 return r;
2265
2266 return 0;
2267}
2268
572b21d9
YW		 2269static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2270 int r;
2271
2272 r = link_reconfigure_internal(link, m, false);
2273 if (r < 0)
2274 link_enter_failed(link);
2275
2276 return 1;
2277}
2278
2279static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2280 int r;
2281
2282 r = link_reconfigure_internal(link, m, true);
2283 if (r < 0)
2284 link_enter_failed(link);
2285
2286 return 1;
2287}
2288
2289int link_reconfigure(Link *link, bool force) {
2290 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2291 int r;
2292
8bceafa7 2293 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2294 * the function from being called multiple times simultaneously, refuse to reconfigure the
2295 * interface in these cases. */
8bceafa7 2296 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2297 return 0; /* 0 means no-op. */
2c0d7ed3 2298
572b21d9
YW		 2299 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2300 link->ifindex);
2301 if (r < 0)
2302 return r;
2303
2304 r = netlink_call_async(link->manager->rtnl, NULL, req,
2305 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2306 link_netlink_destroy_callback, link);
2307 if (r < 0)
2308 return r;
2309
2310 link_ref(link);
2311
8bceafa7 2312 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2313}
2314
e6bf7774 2315static int link_initialized_and_synced(Link *link) {
505f8da7 2316 Network *network;
505f8da7
TG		 2317 int r;
2318
2319 assert(link);
2320 assert(link->ifname);
2321 assert(link->manager);
2322
bd08ce56
YW		 2323 /* We may get called either from the asynchronous netlink callback,
2324 * or directly for link_add() if running in a container. See link_add(). */
2325 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2326 return 0;
505f8da7 2327
6a7a4e4d 2328 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2329 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2330
0d4ad91d
AR		 2331 r = link_new_bound_by_list(link);
2332 if (r < 0)
2333 return r;
2334
2335 r = link_handle_bound_by_list(link);
2336 if (r < 0)
2337 return r;
2338
c4a03a56 2339 if (!link->network) {
0894cfe4 2340 r = wifi_get_info(link);
8d968fdd
YW		 2341 if (r < 0)
2342 return r;
2343
c643bda5
YW		 2344 r = network_get(link->manager, link->iftype, link->sd_device,
2345 link->ifname, link->alternative_names, link->driver,
b8162cd2 2346 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2347 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2348 if (r == -ENOENT) {
2349 link_enter_unmanaged(link);
4232cf04 2350 return 0;
a09dc546
DM		 2351 } else if (r == 0 && network->unmanaged) {
2352 link_enter_unmanaged(link);
2353 return 0;
c4a03a56
TG		 2354 } else if (r < 0)
2355 return r;
505f8da7 2356
c4a03a56
TG		 2357 if (link->flags & IFF_LOOPBACK) {
2358 if (network->link_local != ADDRESS_FAMILY_NO)
2359 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2360
c4a03a56
TG		 2361 if (network->dhcp != ADDRESS_FAMILY_NO)
2362 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2363
c4a03a56
TG		 2364 if (network->dhcp_server)
2365 log_link_debug(link, "Ignoring DHCP server for loopback link");
2366 }
bd2efe92 2367
9092113d
YW		 2368 link->network = network_ref(network);
2369 link_dirty(link);
c4a03a56 2370 }
505f8da7 2371
0d4ad91d
AR		 2372 r = link_new_bound_to_list(link);
2373 if (r < 0)
2374 return r;
2375
a748b692
TG		 2376 r = link_configure(link);
2377 if (r < 0)
2378 return r;
2379
4232cf04 2380 return 0;
505f8da7
TG		 2381}
2382
302a796f 2383static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2384 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2385 int r;
2386
572b21d9
YW		 2387 r = sd_netlink_message_get_errno(m);
2388 if (r < 0) {
40681e5c 2389 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2390 link_enter_failed(link);
2391 return 0;
2392 }
2393
2394 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2395 if (r < 0 && r != -ENODATA) {
2396 link_enter_failed(link);
2397 return 0;
2398 }
2399
2400 strv_free_and_replace(link->alternative_names, s);
2401
4ff296b0
YW		 2402 r = link_initialized_and_synced(link);
2403 if (r < 0)
2404 link_enter_failed(link);
e6bf7774
YW		 2405 return 1;
2406}
2407
3be9d62a 2408static int link_initialized(Link *link, sd_device *device) {
4afd3348 2409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2410 int r;
2411
2412 assert(link);
2413 assert(link->manager);
2414 assert(link->manager->rtnl);
2415 assert(device);
2416
8434fd5c 2417 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2418 return 0;
2419
51517f9e 2420 if (link->sd_device)
679b3605
TG		 2421 return 0;
2422
79008bdd 2423 log_link_debug(link, "udev initialized link");
bd08ce56 2424 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2425
51517f9e 2426 link->sd_device = sd_device_ref(device);
4f561e8e 2427
3c9b8860
TG		 2428 /* udev has initialized the link, but we don't know if we have yet
2429 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2430 * when it returns we know that the pending NEWLINKs have already been
2431 * processed and that we are up-to-date */
4f561e8e 2432
3c9b8860
TG		 2433 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2434 link->ifindex);
4f561e8e
TG		 2435 if (r < 0)
2436 return r;
2437
302a796f
YW		 2438 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2439 link_netlink_destroy_callback, link);
4f561e8e
TG		 2440 if (r < 0)
2441 return r;
2442
5da8149f
TG		 2443 link_ref(link);
2444
4f561e8e
TG		 2445 return 0;
2446}
2447
3be9d62a 2448static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2449 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2450 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2451 Link *link;
5a937ea2 2452 int r;
505f8da7
TG		 2453
2454 assert(m);
fbbeb65a 2455 assert(m->rtnl);
505f8da7
TG		 2456 assert(message);
2457 assert(ret);
2458
2459 r = link_new(m, message, ret);
2460 if (r < 0)
2461 return r;
2462
2463 link = *ret;
2464
6a7a4e4d 2465 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2466
bf331d87
YW		 2467 if (path_is_read_only_fs("/sys") <= 0) {
2468 /* udev should be around */
ae06ab10 2469 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2470 r = sd_device_new_from_device_id(&device, ifindex_str);
2471 if (r < 0) {
83e7c37b 2472 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2473 return 0;
5c416fc4 2474 }
505f8da7 2475
5a937ea2 2476 r = sd_device_get_is_initialized(device);
51517f9e 2477 if (r < 0) {
bf331d87 2478 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2479 goto failed;
2480 }
5a937ea2 2481 if (r == 0) {
505f8da7 2482 /* not yet ready */
79008bdd 2483 log_link_debug(link, "link pending udev initialization...");
505f8da7 2484 return 0;
3c4cb064 2485 }
505f8da7 2486
299ad32d
YW		 2487 r = device_is_renaming(device);
2488 if (r < 0) {
bf331d87 2489 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2490 goto failed;
2491 }
2492 if (r > 0) {
bf331d87 2493 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2494 return 0;
2495 }
2496
4f561e8e
TG		 2497 r = link_initialized(link, device);
2498 if (r < 0)
5c416fc4 2499 goto failed;
4f561e8e 2500 } else {
e6bf7774 2501 r = link_initialized_and_synced(link);
4f561e8e 2502 if (r < 0)
5c416fc4 2503 goto failed;
4f561e8e 2504 }
505f8da7 2505
a748b692 2506 return 0;
5c416fc4
TG		 2507failed:
2508 link_enter_failed(link);
2509 return r;
a748b692
TG		 2510}
2511
c601ebf7 2512int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2513 int r;
2514
2515 assert(link);
2516
2517 log_link_info(link, "Gained IPv6LL");
2518
c601ebf7 2519 link->ipv6ll_address = *address;
e7ab854c
TG		 2520 link_check_ready(link);
2521
b9ea3d2e 2522 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2523 r = link_acquire_ipv6_conf(link);
2524 if (r < 0) {
2525 link_enter_failed(link);
2526 return r;
2527 }
2528 }
2529
2530 return 0;
2531}
2532
3be9d62a
YW		 2533int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2534 sd_device_action_t action;
2535 Manager *m = userdata;
2536 Link *link = NULL;
2537 int r, ifindex;
2538
2539 assert(m);
2540 assert(device);
2541
2542 r = sd_device_get_action(device, &action);
2543 if (r < 0) {
2544 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2545 return 0;
2546 }
2547
2548 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2549 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2550 * still exists — and we are interested in that. */
2551 if (action == SD_DEVICE_REMOVE)
2552 return 0;
2553
2554 r = sd_device_get_ifindex(device, &ifindex);
2555 if (r < 0) {
2556 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2557 device_action_to_string(action));
2558 return 0;
2559 }
2560
2561 r = device_is_renaming(device);
2562 if (r < 0) {
2563 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2564 device_action_to_string(action));
2565 return 0;
2566 }
2567 if (r > 0) {
2568 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2569 return 0;
2570 }
2571
2572 r = link_get(m, ifindex, &link);
2573 if (r < 0) {
2574 if (r != -ENODEV)
2575 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2576 return 0;
2577 }
2578
2579 (void) link_initialized(link, device);
2580
2581 return 0;
2582}
2583
9c0a72f9
TG		 2584static int link_carrier_gained(Link *link) {
2585 int r;
2586
2587 assert(link);
2588
600b7898
YW		 2589 if (link->iftype == ARPHRD_CAN)
2590 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2591 return link_handle_bound_by_list(link);
2592
0894cfe4 2593 r = wifi_get_info(link);
8d968fdd
YW		 2594 if (r < 0)
2595 return r;
2596 if (r > 0) {
8bceafa7 2597 r = link_reconfigure(link, false);
572b21d9
YW		 2598 if (r < 0) {
2599 link_enter_failed(link);
8d968fdd 2600 return r;
572b21d9 2601 }
8d968fdd
YW		 2602 }
2603
b9ea3d2e 2604 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2605 r = link_acquire_conf(link);
2606 if (r < 0) {
2607 link_enter_failed(link);
2608 return r;
2609 }
6fc25497 2610
b425c3ae 2611 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2612 r = link_set_static_configs(link);
6fc25497
SS		 2613 if (r < 0)
2614 return r;
9c0a72f9
TG		 2615 }
2616
0d4ad91d
AR		 2617 r = link_handle_bound_by_list(link);
2618 if (r < 0)
2619 return r;
2620
1f241589
YW		 2621 if (!link->bridge_mdb_configured) {
2622 r = link_set_bridge_mdb(link);
2623 if (r < 0)
2624 return r;
2625 }
2626
2627 if (streq_ptr(link->kind, "bridge")) {
2628 Link *slave;
2629
2630 SET_FOREACH(slave, link->slaves) {
2631 if (slave->bridge_mdb_configured)
2632 continue;
2633
2634 r = link_set_bridge_mdb(slave);
2635 if (r < 0)
2636 link_enter_failed(slave);
2637 }
2638 }
3db468ea 2639
9c0a72f9
TG		 2640 return 0;
2641}
2642
2643static int link_carrier_lost(Link *link) {
2644 int r;
2645
2646 assert(link);
2647
25e992ba 2648 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2649 return 0;
2650
600b7898
YW		 2651 if (link->iftype == ARPHRD_CAN)
2652 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2653 return link_handle_bound_by_list(link);
2654
fbdb6605 2655 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2656 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2657 * configuration and stop the clients as well. */
97e7fb39
SS		 2658 if (link->setting_mtu)
2659 return 0;
2660
2a99eed0 2661 r = link_stop_engines(link, false);
9c0a72f9
TG		 2662 if (r < 0) {
2663 link_enter_failed(link);
2664 return r;
2665 }
2666
3104883d
SS		 2667 r = link_drop_config(link);
2668 if (r < 0)
2669 return r;
2670
2c7b826d 2671 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2672 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2673 r = link_drop_foreign_config(link);
2674 if (r < 0)
2675 return r;
2676 }
3104883d 2677
0d4ad91d
AR		 2678 r = link_handle_bound_by_list(link);
2679 if (r < 0)
2680 return r;
2681
9c0a72f9
TG		 2682 return 0;
2683}
2684
2685int link_carrier_reset(Link *link) {
2686 int r;
2687
2688 assert(link);
2689
2690 if (link_has_carrier(link)) {
2691 r = link_carrier_lost(link);
2692 if (r < 0)
2693 return r;
2694
2695 r = link_carrier_gained(link);
2696 if (r < 0)
2697 return r;
2698
6a7a4e4d 2699 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2700 }
2701
2702 return 0;
2703}
2704
d236718c
DS		 2705static int link_admin_state_up(Link *link) {
2706 int r;
2707
61135582
DS		 2708 assert(link);
2709
3be9d62a
YW		 2710 /* This is called every time an interface admin state changes to up;
2711 * specifically, when IFF_UP flag changes from unset to set. */
2712
61135582
DS		 2713 if (!link->network)
2714 return 0;
2715
2716 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2717 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2718 return link_down(link, NULL);
2719 }
2720
d236718c
DS		 2721 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2722 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2723 * ipv6_mtu_set prevents this from trying to set it too early before
2724 * the link->network has been setup; we only need to reset it
2725 * here if we've already set it during normal initialization. */
2726 if (link->ipv6_mtu_set) {
2727 r = link_set_ipv6_mtu(link);
2728 if (r < 0)
2729 return r;
2730 }
2731
2732 return 0;
2733}
2734
61135582 2735static int link_admin_state_down(Link *link) {
61135582
DS		 2736 assert(link);
2737
2738 if (!link->network)
2739 return 0;
2740
2741 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2742 if (streq_ptr(link->kind, "can") && !link->can_configured)
2743 /* CAN device needs to be down on configure. */
2744 return 0;
2745
61135582
DS		 2746 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2747 return link_up(link);
2748 }
2749
2750 return 0;
2751}
2752
3be9d62a 2753static int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2754 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2755 hw_addr_data hw_addr;
ca4e095a 2756 const char *ifname;
afe7fd56 2757 uint32_t mtu;
d236718c 2758 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2759 int old_master, r;
22936833 2760
dd3efc09 2761 assert(link);
b8941f74 2762 assert(link->ifname);
22936833
TG		 2763 assert(m);
2764
7619683b 2765 if (link->state == LINK_STATE_LINGER) {
5238e957 2766 log_link_info(link, "Link re-added");
289e6774 2767 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2768
2769 r = link_new_carrier_maps(link);
2770 if (r < 0)
2771 return r;
7619683b
TG		 2772 }
2773
1c4baffc 2774 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2775 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2776 Manager *manager = link->manager;
b8941f74 2777
30de2b89 2778 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2779
30de2b89
YW		 2780 link_drop(link);
2781 r = link_add(manager, m, &link);
2782 if (r < 0)
2783 return r;
b8941f74
TG		 2784 }
2785
572b21d9
YW		 2786 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2787 if (r >= 0)
2788 strv_free_and_replace(link->alternative_names, s);
2789
1c4baffc 2790 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2791 if (r >= 0 && mtu > 0) {
2792 link->mtu = mtu;
4e964aa0 2793 if (link->original_mtu == 0) {
afe7fd56 2794 link->original_mtu = mtu;
6a7a4e4d 2795 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2796 }
2797
2798 if (link->dhcp_client) {
3c9b8860
TG		 2799 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2800 link->mtu);
fc95c359
YW		 2801 if (r < 0)
2802 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2803 }
7465dd22
PF		 2804
2805 if (link->radv) {
2806 r = sd_radv_set_mtu(link->radv, link->mtu);
2807 if (r < 0)
2808 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2809 }
9842de0d 2810 }
69629de9 2811
e9189a1f
TG		 2812 /* The kernel may broadcast NEWLINK messages without the MAC address
2813 set, simply ignore them. */
b8162cd2
TR		 2814 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2815 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2816 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2817
b8162cd2 2818 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2819
b8162cd2 2820 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2821
a3adb4a6
YW		 2822 r = ipv4ll_update_mac(link);
2823 if (r < 0)
2824 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2825
d947f7f9
YW		 2826 r = dhcp4_update_mac(link);
2827 if (r < 0)
2828 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2829
eebba6dc
YW		 2830 r = dhcp6_update_mac(link);
2831 if (r < 0)
2832 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2833
d0c4275c 2834 r = radv_update_mac(link);
be9363cc
YW		 2835 if (r < 0)
2836 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2837
2838 if (link->ndisc) {
b8162cd2 2839 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2840 if (r < 0)
2841 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2842 }
d93d655c 2843
dfc58b47
YW		 2844 if (link->lldp) {
2845 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
2846 if (r < 0)
2847 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
2848 }
2849
d93d655c
YW		 2850 r = ipv4_dad_update_mac(link);
2851 if (r < 0)
2852 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2853 }
2854
bb262ef0
YW		 2855 old_master = link->master_ifindex;
2856 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2857
d236718c 2858 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2859 had_carrier = link_has_carrier(link);
2860
bb262ef0 2861 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2862 if (r < 0)
2863 return r;
2864
d236718c
DS		 2865 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2866 log_link_info(link, "Link UP");
2867
2868 r = link_admin_state_up(link);
2869 if (r < 0)
2870 return r;
61135582 2871 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2872 log_link_info(link, "Link DOWN");
2873
61135582
DS		 2874 r = link_admin_state_down(link);
2875 if (r < 0)
2876 return r;
2877 }
2878
273eec24
LP		 2879 r = link_update_lldp(link);
2880 if (r < 0)
2881 return r;
2882
a61bb41c
TG		 2883 carrier_gained = !had_carrier && link_has_carrier(link);
2884 carrier_lost = had_carrier && !link_has_carrier(link);
2885
2886 if (carrier_gained) {
6a7a4e4d 2887 log_link_info(link, "Gained carrier");
a61bb41c 2888
9c0a72f9
TG		 2889 r = link_carrier_gained(link);
2890 if (r < 0)
2891 return r;
a61bb41c 2892 } else if (carrier_lost) {
6a7a4e4d 2893 log_link_info(link, "Lost carrier");
a61bb41c 2894
9c0a72f9
TG		 2895 r = link_carrier_lost(link);
2896 if (r < 0)
a61bb41c 2897 return r;
a61bb41c
TG		 2898 }
2899
2900 return 0;
dd3efc09 2901}
fe8db0c5 2902
3be9d62a
YW		 2903int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2904 Link *link = NULL;
2905 NetDev *netdev = NULL;
2906 uint16_t type;
2907 const char *name;
2908 int r, ifindex;
2909
2910 assert(rtnl);
2911 assert(message);
2912 assert(m);
2913
2914 if (sd_netlink_message_is_error(message)) {
2915 r = sd_netlink_message_get_errno(message);
2916 if (r < 0)
2917 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2918
2919 return 0;
2920 }
2921
2922 r = sd_netlink_message_get_type(message, &type);
2923 if (r < 0) {
2924 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2925 return 0;
2926 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2927 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2928 return 0;
2929 }
2930
2931 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2932 if (r < 0) {
2933 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2934 return 0;
2935 } else if (ifindex <= 0) {
2936 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2937 return 0;
2938 }
2939
2940 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2941 if (r < 0) {
2942 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2943 return 0;
2944 }
2945
2946 (void) link_get(m, ifindex, &link);
2947 (void) netdev_get(m, name, &netdev);
2948
2949 switch (type) {
2950 case RTM_NEWLINK:
2951 if (!link) {
2952 /* link is new, so add it */
2953 r = link_add(m, message, &link);
2954 if (r < 0) {
2955 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2956 return 0;
2957 }
2958 }
2959
2960 if (netdev) {
2961 /* netdev exists, so make sure the ifindex matches */
2962 r = netdev_set_ifindex(netdev, message);
2963 if (r < 0) {
2964 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2965 return 0;
2966 }
2967 }
2968
2969 r = link_update(link, message);
2970 if (r < 0) {
2971 log_warning_errno(r, "Could not process link message, ignoring: %m");
2972 return 0;
2973 }
2974
2975 break;
2976
2977 case RTM_DELLINK:
2978 link_drop(link);
2979 netdev_drop(netdev);
2980
2981 break;
2982
2983 default:
2984 assert_not_reached("Received link message with invalid RTNL message type.");
2985 }
2986
2987 return 1;
2988}
2989
fe8db0c5 2990static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2991 [LINK_STATE_PENDING] = "pending",
bd08ce56 2992 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2993 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2994 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2995 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2996 [LINK_STATE_FAILED] = "failed",
370e9930 2997 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2998};
2999
3000DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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