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network: add skeleton of request queue
[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"
19d9a5ad 44#include "networkd-queue.h"
7465dd22 45#include "networkd-radv.h"
bce67bbe 46#include "networkd-routing-policy-rule.h"
19d9a5ad 47#include "networkd-sriov.h"
3b5a4fc6 48#include "networkd-state-file.h"
19d9a5ad 49#include "networkd-sysctl.h"
8d968fdd 50#include "networkd-wifi.h"
cf1d700d
TG		 51#include "set.h"
52#include "socket-util.h"
bf331d87 53#include "stat-util.h"
15a5e950 54#include "stdio-util.h"
8b43440b 55#include "string-table.h"
51517f9e 56#include "strv.h"
62e021a9 57#include "sysctl-util.h"
34658df2 58#include "tc.h"
e4de7287 59#include "tmpfile-util.h"
299ad32d 60#include "udev-util.h"
cf1d700d 61#include "util.h"
737f1405 62#include "vrf.h"
fc2f9534 63
3ca1fab7 64bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 65 assert(link);
66
78c958f8
TG		 67 if (link->flags & IFF_LOOPBACK)
68 return false;
69
70 if (!link->network)
71 return false;
72
500b96eb 73 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 74 return false;
75
98d20a17 76 if (STRPTR_IN_SET(link->kind,
77 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 78 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 79 return false;
80
f410d463
YW		 81 /* L3 or L3S mode do not support ARP. */
82 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
83 return false;
84
f2bfcdb9
YW		 85 if (link->network->bond)
86 return false;
87
3ca1fab7 88 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 89}
90
f8f2f880 91bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 92 assert(link);
93
fa709992
LP		 94 if (!socket_ipv6_is_supported())
95 return false;
96
d0d6a4cd
TG		 97 if (link->flags & IFF_LOOPBACK)
98 return false;
99
100 if (!link->network)
101 return false;
102
500b96eb 103 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 104 return false;
105
106 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 107 return false;
108
f2bfcdb9
YW		 109 if (link->network->bond)
110 return false;
111
e0ee46f2 112 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 113}
114
5e0534f1 115bool link_ipv6_enabled(Link *link) {
439689c6
SS		 116 assert(link);
117
118 if (!socket_ipv6_is_supported())
119 return false;
120
b102cdca 121 if (link->network->bond)
2b00a4e0
TY		 122 return false;
123
500b96eb 124 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 125 return false;
126
4cef7fe3 127 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 128 if (link_ipv6ll_enabled(link))
129 return true;
130
131 if (network_has_static_ipv6_configurations(link->network))
132 return true;
133
134 return false;
439689c6
SS		 135}
136
34bf3c00
YW		 137static bool link_is_enslaved(Link *link) {
138 if (link->flags & IFF_SLAVE)
139 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
140 return true;
141
34bf3c00
YW		 142 if (!link->network)
143 return false;
144
bb262ef0 145 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 146 return true;
147
bb262ef0
YW		 148 /* TODO: add conditions for other netdevs. */
149
34bf3c00
YW		 150 return false;
151}
152
45e11abf
YW		 153static void link_update_master_operstate(Link *link, NetDev *netdev) {
154 Link *master;
155
156 if (!netdev)
157 return;
158
7936917e
YW		 159 if (netdev->ifindex <= 0)
160 return;
161
45e11abf
YW		 162 if (link_get(link->manager, netdev->ifindex, &master) < 0)
163 return;
164
165 link_update_operstate(master, true);
166}
167
8430841b
L		 168static LinkAddressState address_state_from_scope(uint8_t scope) {
169 if (scope < RT_SCOPE_SITE)
170 /* universally accessible addresses found */
171 return LINK_ADDRESS_STATE_ROUTABLE;
172
173 if (scope < RT_SCOPE_HOST)
174 /* only link or site local addresses found */
175 return LINK_ADDRESS_STATE_DEGRADED;
176
177 /* no useful addresses found */
178 return LINK_ADDRESS_STATE_OFF;
179}
180
45e11abf 181void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 182 LinkOperationalState operstate;
1678fbb3 183 LinkCarrierState carrier_state;
8430841b 184 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
35c5a9ca 185 _cleanup_strv_free_ char **p = NULL;
90afec18 186 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 187 bool changed = false;
1678fbb3 188 Address *address;
14153d1b 189
84de38c5
TG		 190 assert(link);
191
192 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 193 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 194 else if (link_has_carrier(link)) {
1678fbb3
YW		 195 if (link_is_enslaved(link))
196 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 197 else
1678fbb3 198 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 199 } else if (link->flags & IFF_UP)
1678fbb3 200 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 201 else
1678fbb3 202 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 203
1678fbb3 204 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 205 Link *slave;
206
90e74a66 207 SET_FOREACH(slave, link->slaves) {
959f65d3 208 link_update_operstate(slave, false);
84de38c5 209
1678fbb3
YW		 210 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
211 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 212 }
959f65d3 213 }
84de38c5 214
90e74a66 215 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 216 if (!address_is_ready(address))
217 continue;
84de38c5 218
90afec18
YW		 219 if (address->family == AF_INET)
220 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 221
90afec18
YW		 222 if (address->family == AF_INET6)
223 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 224 }
84de38c5 225
1678fbb3 226 /* for operstate we also take foreign addresses into account */
90e74a66 227 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 228 if (!address_is_ready(address))
229 continue;
230
90afec18
YW		 231 if (address->family == AF_INET)
232 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 233
90afec18
YW		 234 if (address->family == AF_INET6)
235 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 236 }
237
8430841b
L		 238 ipv4_address_state = address_state_from_scope(ipv4_scope);
239 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 240 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 241
242 /* Mapping of address and carrier state vs operational state
243 * carrier state
244 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
245 * ------------------------------------------------------------------------------
246 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
247 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
248 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
249 */
84de38c5 250
1678fbb3
YW		 251 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
252 operstate = (LinkOperationalState) carrier_state;
253 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
254 operstate = LINK_OPERSTATE_ROUTABLE;
255 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
256 operstate = LINK_OPERSTATE_DEGRADED;
257 else
14153d1b
YW		 258 operstate = LINK_OPERSTATE_ENSLAVED;
259
35c5a9ca
YW		 260 if (link->carrier_state != carrier_state) {
261 link->carrier_state = carrier_state;
262 changed = true;
263 if (strv_extend(&p, "CarrierState") < 0)
264 log_oom();
265 }
959f65d3 266
35c5a9ca
YW		 267 if (link->address_state != address_state) {
268 link->address_state = address_state;
269 changed = true;
270 if (strv_extend(&p, "AddressState") < 0)
271 log_oom();
959f65d3
YW		 272 }
273
8430841b
L		 274 if (link->ipv4_address_state != ipv4_address_state) {
275 link->ipv4_address_state = ipv4_address_state;
276 changed = true;
277 if (strv_extend(&p, "IPv4AddressState") < 0)
278 log_oom();
279 }
280
281 if (link->ipv6_address_state != ipv6_address_state) {
282 link->ipv6_address_state = ipv6_address_state;
283 changed = true;
284 if (strv_extend(&p, "IPv6AddressState") < 0)
285 log_oom();
286 }
287
84de38c5
TG		 288 if (link->operstate != operstate) {
289 link->operstate = operstate;
35c5a9ca
YW		 290 changed = true;
291 if (strv_extend(&p, "OperationalState") < 0)
292 log_oom();
84de38c5 293 }
959f65d3 294
35c5a9ca
YW		 295 if (p)
296 link_send_changed_strv(link, p);
297 if (changed)
298 link_dirty(link);
299
45e11abf 300 if (also_update_master && link->network) {
c0267a59 301 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 302 link_update_master_operstate(link, link->network->bond);
303 link_update_master_operstate(link, link->network->bridge);
959f65d3 304 }
84de38c5
TG		 305}
306
51d18171
TG		 307#define FLAG_STRING(string, flag, old, new) \
308 (((old ^ new) & flag) \
309 ? ((old & flag) ? (" -" string) : (" +" string)) \
310 : "")
311
bb262ef0 312static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 313 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
314 uint8_t operstate;
315 int r;
316
317 assert(link);
318
319 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 320 if (r < 0)
321 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 322
1c4baffc 323 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 324 if (r < 0)
325 /* if we got a message without operstate, take it to mean
326 the state was unchanged */
327 operstate = link->kernel_operstate;
328
bb262ef0 329 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 330 return 0;
331
332 if (link->flags != flags) {
6a7a4e4d 333 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		 334 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
335 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
336 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
337 FLAG_STRING("UP", IFF_UP, link->flags, flags),
338 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
339 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
340 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
341 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
342 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
343 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
344 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
345 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
346 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
347 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
348 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
349 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
350 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
351 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
352 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
353
354 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
355 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
356 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
357 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
358 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
359 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
360 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
361 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
362
363 /* link flags are currently at most 18 bits, let's align to
364 * printing 20 */
365 if (unknown_flags_added)
79008bdd 366 log_link_debug(link,
6a7a4e4d 367 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 368 unknown_flags_added);
369
370 if (unknown_flags_removed)
79008bdd 371 log_link_debug(link,
6a7a4e4d 372 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 373 unknown_flags_removed);
374 }
375
376 link->flags = flags;
377 link->kernel_operstate = operstate;
378
959f65d3 379 link_update_operstate(link, true);
51d18171
TG		 380
381 return 0;
382}
383
1c4baffc 384static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 385 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 386 const char *ifname, *kind = NULL;
b710e6b6 387 unsigned short iftype;
572b21d9
YW		 388 int r, ifindex;
389 uint16_t type;
f579559b 390
0c2f9b84 391 assert(manager);
505f8da7 392 assert(message);
f579559b
TG		 393 assert(ret);
394
6cad256d
TJ		 395 /* check for link kind */
396 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
397 if (r == 0) {
db2f8a2e 398 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 399 r = sd_netlink_message_exit_container(message);
400 if (r < 0)
401 return r;
402 }
403
1c4baffc 404 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 405 if (r < 0)
406 return r;
407 else if (type != RTM_NEWLINK)
408 return -EINVAL;
409
410 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
411 if (r < 0)
412 return r;
413 else if (ifindex <= 0)
414 return -EINVAL;
415
b710e6b6
LP		 416 r = sd_rtnl_message_link_get_type(message, &iftype);
417 if (r < 0)
418 return r;
419
1c4baffc 420 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 421 if (r < 0)
422 return r;
423
17f9c355 424 link = new(Link, 1);
f579559b
TG		 425 if (!link)
426 return -ENOMEM;
427
17f9c355
YW		 428 *link = (Link) {
429 .n_ref = 1,
430 .manager = manager,
431 .state = LINK_STATE_PENDING,
17f9c355
YW		 432 .ifindex = ifindex,
433 .iftype = iftype,
15761549 434
f5fbe71d 435 .n_dns = UINT_MAX,
15761549
YW		 436 .dns_default_route = -1,
437 .llmnr = _RESOLVE_SUPPORT_INVALID,
438 .mdns = _RESOLVE_SUPPORT_INVALID,
439 .dnssec_mode = _DNSSEC_MODE_INVALID,
440 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 441 };
442
505f8da7
TG		 443 link->ifname = strdup(ifname);
444 if (!link->ifname)
445 return -ENOMEM;
f579559b 446
6cad256d
TJ		 447 if (kind) {
448 link->kind = strdup(kind);
449 if (!link->kind)
450 return -ENOMEM;
451 }
452
cbff7170
TJ		 453 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
454 if (r < 0)
455 log_link_debug_errno(link, r, "New device has no master, continuing without");
456
b8162cd2 457 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 458 if (r < 0)
b8162cd2 459 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 460
14b66dbc
TR		 461 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
462 if (r < 0)
463 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
464
c643bda5 465 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 466 if (r < 0)
467 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
468
c643bda5
YW		 469 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
470 if (r < 0)
471 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
472
572b21d9
YW		 473 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
474 if (r < 0 && r != -ENODATA)
475 return r;
476
34437b4f 477 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 478 return -ENOMEM;
fe8db0c5 479
34437b4f 480 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 481 return -ENOMEM;
482
34437b4f 483 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 484 return -ENOMEM;
485
967d72ed 486 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 487 if (r < 0)
488 return r;
489
bb262ef0 490 r = link_update_flags(link, message, false);
51d18171
TG		 491 if (r < 0)
492 return r;
493
1cc6c93a 494 *ret = TAKE_PTR(link);
f579559b
TG		 495
496 return 0;
497}
498
15761549
YW		 499void link_ntp_settings_clear(Link *link) {
500 link->ntp = strv_free(link->ntp);
501}
502
503void link_dns_settings_clear(Link *link) {
f5fbe71d 504 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 505 for (unsigned i = 0; i < link->n_dns; i++)
506 in_addr_full_free(link->dns[i]);
15761549 507 link->dns = mfree(link->dns);
f5fbe71d 508 link->n_dns = UINT_MAX;
15761549 509
6e4571f0
YW		 510 link->search_domains = ordered_set_free(link->search_domains);
511 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 512
513 link->dns_default_route = -1;
514 link->llmnr = _RESOLVE_SUPPORT_INVALID;
515 link->mdns = _RESOLVE_SUPPORT_INVALID;
516 link->dnssec_mode = _DNSSEC_MODE_INVALID;
517 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
518
519 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
520}
521
1a6bb31f
YW		 522static void link_free_engines(Link *link) {
523 if (!link)
524 return;
525
526 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
527 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
528 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 529 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 530
531 link->lldp = sd_lldp_unref(link->lldp);
1c494872 532 link_lldp_emit_stop(link);
1a6bb31f
YW		 533
534 ndisc_flush(link);
535
536 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
537 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 538 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 539 link->ndisc = sd_ndisc_unref(link->ndisc);
540 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 541
542 ipv4_dad_unref(link);
1a6bb31f
YW		 543}
544
8301aa0b 545static Link *link_free(Link *link) {
8301aa0b 546 assert(link);
f579559b 547
15761549
YW		 548 link_ntp_settings_clear(link);
549 link_dns_settings_clear(link);
550
8eec0b9d
YW		 551 link->routes = set_free(link->routes);
552 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 553 link->dhcp_routes = set_free(link->dhcp_routes);
554 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 555 link->dhcp6_routes = set_free(link->dhcp6_routes);
556 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
557 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
558 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 559 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 560
8eec0b9d
YW		 561 link->nexthops = set_free(link->nexthops);
562 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 563
8eec0b9d
YW		 564 link->neighbors = set_free(link->neighbors);
565 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 566
8eec0b9d
YW		 567 link->addresses = set_free(link->addresses);
568 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 569 link->pool_addresses = set_free(link->pool_addresses);
e5526518 570 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 571 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
572 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
573 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
574 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 575 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 576
4b409e85
YW		 577 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
578
1a6bb31f 579 link_free_engines(link);
49699bac 580
c166a070 581 free(link->ifname);
572b21d9 582 strv_free(link->alternative_names);
ceac4078 583 free(link->kind);
8d968fdd 584 free(link->ssid);
c643bda5 585 free(link->driver);
6cad256d 586
a34e58d4
YW		 587 unlink_and_free(link->lease_file);
588 unlink_and_free(link->lldp_file);
589 unlink_and_free(link->state_file);
c166a070 590
51517f9e 591 sd_device_unref(link->sd_device);
b5db00e5 592
0d4ad91d 593 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 594 hashmap_free(link->bound_by_links);
595
5f707e12 596 set_free_with_destructor(link->slaves, link_unref);
033295c1 597
c9c908a6
YW		 598 network_unref(link->network);
599
8301aa0b 600 return mfree(link);
14b746f7
TG		 601}
602
8301aa0b 603DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 604
11a7f229
TG		 605int link_get(Manager *m, int ifindex, Link **ret) {
606 Link *link;
11a7f229
TG		 607
608 assert(m);
e856ed00 609 assert(ifindex > 0);
11a7f229
TG		 610 assert(ret);
611
ae06ab10 612 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 613 if (!link)
614 return -ENODEV;
615
616 *ret = link;
617
618 return 0;
619}
620
af9ba57a 621void link_set_state(Link *link, LinkState state) {
e331e246
TG		 622 assert(link);
623
624 if (link->state == state)
625 return;
626
0beb9542
YW		 627 log_link_debug(link, "State changed: %s -> %s",
628 link_state_to_string(link->state),
629 link_state_to_string(state));
630
e331e246
TG		 631 link->state = state;
632
633 link_send_changed(link, "AdministrativeState", NULL);
9092113d 634 link_dirty(link);
e331e246
TG		 635}
636
57bd6899
TG		 637static void link_enter_unmanaged(Link *link) {
638 assert(link);
639
e331e246 640 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 641}
642
2a99eed0 643int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 644 int r = 0, k;
645
646 assert(link);
647 assert(link->manager);
648 assert(link->manager->event);
649
80060352
ZJS		 650 bool keep_dhcp = may_keep_dhcp &&
651 link->network &&
652 (link->manager->restarting ||
653 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
654
84add3cd 655 if (!keep_dhcp) {
111bb8f9 656 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 657 if (k < 0)
36c7d709 658 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 659 }
660
84add3cd
YW		 661 k = sd_ipv4acd_stop(link->dhcp_acd);
662 if (k < 0)
663 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 664
2a99eed0
YW		 665 k = sd_dhcp_server_stop(link->dhcp_server);
666 if (k < 0)
667 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
668
9cc65242
YW		 669 k = sd_lldp_stop(link->lldp);
670 if (k < 0)
671 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
672
84add3cd
YW		 673 k = sd_ipv4ll_stop(link->ipv4ll);
674 if (k < 0)
675 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 676
490ccbd5 677 k = ipv4_dad_stop(link);
2488e4d9
YW		 678 if (k < 0)
679 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 680
84add3cd
YW		 681 k = sd_dhcp6_client_stop(link->dhcp6_client);
682 if (k < 0)
683 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 684
2ffd6d73
YW		 685 k = dhcp6_pd_remove(link);
686 if (k < 0)
687 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 688
84add3cd
YW		 689 k = sd_ndisc_stop(link->ndisc);
690 if (k < 0)
691 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 692
84add3cd
YW		 693 k = sd_radv_stop(link->radv);
694 if (k < 0)
695 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 696
7272b25e 697 link_lldp_emit_stop(link);
111bb8f9
TG		 698 return r;
699}
700
b22d8a00 701void link_enter_failed(Link *link) {
ef1ba606 702 assert(link);
f882c247 703
370e9930 704 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 705 return;
706
6a7a4e4d 707 log_link_warning(link, "Failed");
449f7554 708
e331e246 709 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 710
2a99eed0 711 (void) link_stop_engines(link, false);
f882c247
TG		 712}
713
7033af49
YW		 714static int link_join_netdevs_after_configured(Link *link) {
715 NetDev *netdev;
7033af49
YW		 716 int r;
717
90e74a66 718 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 719 if (netdev->ifindex > 0)
720 /* Assume already enslaved. */
721 continue;
722
723 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
724 continue;
725
726 log_struct(LOG_DEBUG,
727 LOG_LINK_INTERFACE(link),
728 LOG_NETDEV_INTERFACE(netdev),
729 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
730
731 r = netdev_join(netdev, link, NULL);
732 if (r < 0)
733 return log_struct_errno(LOG_WARNING, r,
734 LOG_LINK_INTERFACE(link),
735 LOG_NETDEV_INTERFACE(netdev),
736 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
737 }
738
739 return 0;
740}
741
e3a7b048 742static void link_enter_configured(Link *link) {
dd43110f
TG		 743 assert(link);
744 assert(link->network);
e3a7b048 745
289e6774 746 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 747 return;
dd43110f 748
e331e246 749 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 750
7033af49 751 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 752}
753
6accfd31
DA		 754void link_check_ready(Link *link) {
755 Address *a;
6accfd31
DA		 756
757 assert(link);
758
5f58af25
YW		 759 if (link->state == LINK_STATE_CONFIGURED)
760 return;
761
d19b9939
YW		 762 if (link->state != LINK_STATE_CONFIGURING)
763 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 764
765 if (!link->network)
766 return;
767
600b7898
YW		 768 if (link->iftype == ARPHRD_CAN) {
769 /* let's shortcut things for CAN which doesn't need most of checks below. */
770 if (!link->can_configured)
771 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
772
773 link_enter_configured(link);
774 return;
775 }
776
d19b9939
YW		 777 if (!link->addresses_configured)
778 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 779
d19b9939
YW		 780 if (!link->neighbors_configured)
781 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 782
90e74a66 783 SET_FOREACH(a, link->addresses)
39373cb9
YW		 784 if (!address_is_ready(a)) {
785 _cleanup_free_ char *str = NULL;
786
5380707a
YW		 787 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
788 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 789 }
6aa5773b 790
d19b9939
YW		 791 if (!link->static_routes_configured)
792 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 793
d19b9939
YW		 794 if (!link->static_nexthops_configured)
795 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 796
d19b9939
YW		 797 if (!link->routing_policy_rules_configured)
798 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 799
d19b9939
YW		 800 if (!link->tc_configured)
801 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 802
d19b9939
YW		 803 if (!link->sr_iov_configured)
804 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 805
d19b9939
YW		 806 if (!link->bridge_mdb_configured)
807 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 808
463797c1 809 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 810 bool has_ndisc_address = false;
811 NDiscAddress *n;
6accfd31 812
94876904
YW		 813 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
814 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 815
90e74a66 816 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 817 if (!n->marked) {
818 has_ndisc_address = true;
819 break;
820 }
821
8cd37e43 822 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 823 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 824 !link->ipv4ll_address_configured)
825 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
826 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 827
0d0799da
YW		 828 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
829 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 830 if (!link->dhcp4_configured &&
831 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
832 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 833 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 834 !link->ipv4ll_address_configured)
835 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 836 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 837
0d0799da 838 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		 839 __func__,
840 yes_no(link->dhcp4_configured),
0d0799da 841 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 842 yes_no(link->dhcp6_address_configured),
843 yes_no(link->dhcp6_route_configured),
844 yes_no(link->dhcp6_pd_address_configured),
845 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 846 yes_no(link->ndisc_addresses_configured),
847 yes_no(link->ndisc_routes_configured));
39373cb9 848 }
463797c1 849 }
6accfd31 850
5f58af25 851 link_enter_configured(link);
6accfd31
DA		 852}
853
682c65b0 854static int link_set_static_configs(Link *link) {
f882c247
TG		 855 int r;
856
857 assert(link);
858 assert(link->network);
f5be5601 859 assert(link->state != _LINK_STATE_INVALID);
f882c247 860
2428613f 861 /* Reset all *_configured flags we are configuring. */
9b966cee 862 link->request_static_addresses = false;
2428613f 863 link->addresses_configured = false;
6aa5773b 864 link->addresses_ready = false;
2428613f
YW		 865 link->neighbors_configured = false;
866 link->static_routes_configured = false;
c16c7808 867 link->static_nexthops_configured = false;
2428613f
YW		 868 link->routing_policy_rules_configured = false;
869
f6bb7ac5
TJ		 870 r = link_set_bridge_fdb(link);
871 if (r < 0)
872 return r;
873
1f241589
YW		 874 r = link_set_bridge_mdb(link);
875 if (r < 0)
876 return r;
877
58f1fe9a 878 r = link_set_neighbors(link);
f3ef324d
YW		 879 if (r < 0)
880 return r;
e4a71bf3 881
682c65b0
YW		 882 r = link_set_addresses(link);
883 if (r < 0)
884 return r;
bd6379ec 885
fe2bc17c
YW		 886 r = link_set_address_labels(link);
887 if (r < 0)
888 return r;
f882c247 889
e5526518 890 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 891 r = dhcp4_server_configure(link);
892 if (r < 0)
893 return r;
d4cdbea5 894
f882c247
TG		 895 return 0;
896}
897
3a390124 898static int link_configure_continue(Link *link);
55dc8c4a 899
e16e4b3b
DS		 900static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
901 int r;
902
903 assert(link);
904
905 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
906 return 1;
907
908 r = sd_netlink_message_get_errno(m);
909 if (r < 0)
910 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
911 else
912 log_link_debug(link, "Setting MAC address done.");
913
914 return 1;
915}
916
917static int link_set_mac(Link *link) {
918 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
919 int r;
920
921 assert(link);
922 assert(link->network);
923 assert(link->manager);
924 assert(link->manager->rtnl);
925
926 if (!link->network->mac)
927 return 0;
928
929 log_link_debug(link, "Setting MAC address");
930
931 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
932 if (r < 0)
933 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
934
935 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
936 if (r < 0)
937 return log_link_error_errno(link, r, "Could not set MAC address: %m");
938
939 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
940 link_netlink_destroy_callback, link);
941 if (r < 0)
942 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
943
944 link_ref(link);
945
946 return 0;
947}
948
949static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
950 int r;
951
952 assert(link);
953
954 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
955 return 1;
956
957 r = sd_netlink_message_get_errno(m);
958 if (r < 0)
959 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
960 else
961 log_link_debug(link, "Setting nomaster done.");
962
963 return 1;
964}
965
966static int link_set_nomaster(Link *link) {
967 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
968 int r;
969
970 assert(link);
971 assert(link->network);
972 assert(link->manager);
973 assert(link->manager->rtnl);
974
975 /* set it free if not enslaved with networkd */
c0267a59 976 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 977 return 0;
978
979 log_link_debug(link, "Setting nomaster");
980
981 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
982 if (r < 0)
983 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
984
985 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
986 if (r < 0)
987 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
988
989 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
990 link_netlink_destroy_callback, link);
991 if (r < 0)
992 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
993
994 link_ref(link);
995
996 return 0;
997}
998
302a796f 999static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1000 int r;
1001
1002 assert(m);
1003 assert(link);
1004 assert(link->ifname);
1005
55dc8c4a
YW		 1006 link->setting_mtu = false;
1007
5da8149f 1008 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1009 return 1;
1010
1c4baffc 1011 r = sd_netlink_message_get_errno(m);
4ff296b0 1012 if (r < 0)
5ecb131d 1013 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1014 else
1015 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1016
4ff296b0 1017 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1018 r = link_configure_continue(link);
4ff296b0
YW		 1019 if (r < 0)
1020 link_enter_failed(link);
1021 }
4f882b2a
TG		 1022
1023 return 1;
1024}
1025
933c70a0 1026int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1027 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1028 int r;
1029
1030 assert(link);
1031 assert(link->manager);
1032 assert(link->manager->rtnl);
1033
40288ece
YW		 1034 if (mtu == 0 || link->setting_mtu)
1035 return 0;
1036
933c70a0 1037 if (link->mtu == mtu)
ee493106
YW		 1038 return 0;
1039
6a7a4e4d 1040 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1041
6a7a4e4d
LP		 1042 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1043 if (r < 0)
1044 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1045
44b598a1 1046 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1047 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1048 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1049
1050 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1051 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1052
72c2500b 1053 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1054 }
1055
1c4baffc 1056 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1057 if (r < 0)
1058 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1059
302a796f
YW		 1060 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1061 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1062 if (r < 0)
1063 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1064
ae941762 1065 link_ref(link);
1046bf9b 1066 link->setting_mtu = true;
b226d99b 1067
4f882b2a
TG		 1068 return 0;
1069}
1070
f6fcc1c2
YW		 1071static bool link_reduces_vlan_mtu(Link *link) {
1072 /* See netif_reduces_vlan_mtu() in kernel. */
1073 return streq_ptr(link->kind, "macsec");
1074}
1075
1076static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1077 uint32_t mtu = 0;
1078 NetDev *dev;
f6fcc1c2 1079
90e74a66 1080 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1081 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1082 /* See vlan_dev_change_mtu() in kernel. */
1083 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1084
1085 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1086 /* See macvlan_change_mtu() in kernel. */
1087 mtu = dev->mtu;
1088
1089 return mtu;
1090}
1091
1092static int link_configure_mtu(Link *link) {
1093 uint32_t mtu;
1094
1095 assert(link);
1096 assert(link->network);
1097
1098 if (link->network->mtu > 0)
1099 return link_set_mtu(link, link->network->mtu);
1100
1101 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1102 if (link->mtu >= mtu)
1103 return 0;
1104
1105 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1106 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1107 link->mtu, mtu);
1108
1109 return link_set_mtu(link, mtu);
1110}
1111
302a796f 1112static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1113 int r;
1114
1115 assert(m);
1116 assert(link);
1117 assert(link->ifname);
1118
1119 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1120 return 1;
1121
1122 r = sd_netlink_message_get_errno(m);
1123 if (r < 0)
5ecb131d 1124 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1125
1126 return 1;
1127}
1128
1129static int link_set_flags(Link *link) {
1130 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1131 unsigned ifi_change = 0;
1132 unsigned ifi_flags = 0;
1133 int r;
1134
1135 assert(link);
1136 assert(link->manager);
1137 assert(link->manager->rtnl);
1138
1139 if (link->flags & IFF_LOOPBACK)
1140 return 0;
1141
1142 if (!link->network)
1143 return 0;
1144
937e305e
SS		 1145 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1146 link->network->promiscuous < 0)
99d2baa2
SS		 1147 return 0;
1148
1149 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1150 if (r < 0)
1151 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1152
1153 if (link->network->arp >= 0) {
1154 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1155 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1156 }
1157
1158 if (link->network->multicast >= 0) {
1159 ifi_change |= IFF_MULTICAST;
1160 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1161 }
1162
866e6b7a
SS		 1163 if (link->network->allmulticast >= 0) {
1164 ifi_change |= IFF_ALLMULTI;
1165 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1166 }
1167
937e305e
SS		 1168 if (link->network->promiscuous >= 0) {
1169 ifi_change |= IFF_PROMISC;
1170 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1171 }
1172
99d2baa2
SS		 1173 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1174 if (r < 0)
1175 return log_link_error_errno(link, r, "Could not set link flags: %m");
1176
302a796f
YW		 1177 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1178 link_netlink_destroy_callback, link);
99d2baa2
SS		 1179 if (r < 0)
1180 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1181
1182 link_ref(link);
1183
1184 return 0;
1185}
1186
e7ab854c
TG		 1187static int link_acquire_ipv6_conf(Link *link) {
1188 int r;
1189
1190 assert(link);
1191
086b8853 1192 if (link->radv) {
7465dd22 1193 assert(link->radv);
94876904 1194 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1195
1196 log_link_debug(link, "Starting IPv6 Router Advertisements");
1197
fd3ef936
YW		 1198 r = radv_emit_dns(link);
1199 if (r < 0)
1200 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1201
7465dd22
PF		 1202 r = sd_radv_start(link->radv);
1203 if (r < 0 && r != -EBUSY)
1204 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1205 }
1206
294f129b
YW		 1207 r = ndisc_start(link);
1208 if (r < 0)
1209 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 1210
294f129b
YW		 1211 r = dhcp6_start(link);
1212 if (r < 0)
1213 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 1214
1633c457
YW		 1215 r = dhcp6_request_prefix_delegation(link);
1216 if (r < 0)
1217 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1218
e7ab854c
TG		 1219 return 0;
1220}
1221
6fc25497 1222static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1223 int r;
1224
1225 assert(link);
ff254138
TG		 1226 assert(link->manager);
1227 assert(link->manager->event);
1228
0107b769 1229 if (link->dhcp_client) {
294f129b 1230 r = dhcp4_start(link);
0107b769 1231 if (r < 0)
294f129b 1232 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 1233
0b4b66cc 1234 } else if (link->ipv4ll) {
6a7a4e4d 1235 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1236
1237 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1238 if (r < 0)
1239 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1240 }
1241
6fc25497
SS		 1242 return 0;
1243}
1244
1245static int link_acquire_conf(Link *link) {
1246 int r;
1247
1248 assert(link);
1249
1250 r = link_acquire_ipv4_conf(link);
1251 if (r < 0)
1252 return r;
1253
94876904 1254 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1255 r = link_acquire_ipv6_conf(link);
1256 if (r < 0)
1257 return r;
1258 }
1259
2ffd6d73
YW		 1260 r = link_lldp_emit_start(link);
1261 if (r < 0)
1262 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1263
ff254138
TG		 1264 return 0;
1265}
1266
a61bb41c 1267bool link_has_carrier(Link *link) {
deb2e523
TG		 1268 /* see Documentation/networking/operstates.txt in the kernel sources */
1269
a61bb41c 1270 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1271 return true;
1272
a61bb41c 1273 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1274 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1275 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1276 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1277 return true;
1278
1279 return false;
1280}
1281
0e2fdb83
SS		 1282static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1283 int r;
1284
1285 assert(link);
1286
9524014e
DS		 1287 link->setting_genmode = false;
1288
0e2fdb83
SS		 1289 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1290 return 1;
1291
1292 r = sd_netlink_message_get_errno(m);
1293 if (r < 0)
5ecb131d 1294 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1295 else
1296 log_link_debug(link, "Setting address genmode done.");
1297
1298 if (link->state == LINK_STATE_INITIALIZED) {
1299 r = link_configure_continue(link);
1300 if (r < 0)
1301 link_enter_failed(link);
1302 }
0e2fdb83
SS		 1303
1304 return 1;
1305}
1306
1307static int link_configure_addrgen_mode(Link *link) {
1308 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1309 uint8_t ipv6ll_mode;
1310 int r;
1311
1312 assert(link);
1313 assert(link->network);
1314 assert(link->manager);
1315 assert(link->manager->rtnl);
1316
9524014e 1317 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1318 return 0;
1319
0e2fdb83
SS		 1320 log_link_debug(link, "Setting address genmode for link");
1321
1322 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1323 if (r < 0)
1324 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1325
1326 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1327 if (r < 0)
1328 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1329
1330 r = sd_netlink_message_open_container(req, AF_INET6);
1331 if (r < 0)
1332 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1333
1334 if (!link_ipv6ll_enabled(link))
1335 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1336 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1337 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1338 if (r < 0) {
1339 /* The file may not exist. And even if it exists, when stable_secret is unset,
0e275271
YW		 1340 * reading the file fails with ENOMEM when read_full_virtual_file(), which uses
1341 * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
1342 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
a6f1848a
SS		 1343
1344 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1345 } else
1346 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1347 } else
6f6296b9 1348 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1349
1350 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1351 if (r < 0)
1352 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1353
1354 r = sd_netlink_message_close_container(req);
1355 if (r < 0)
1356 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1357
1358 r = sd_netlink_message_close_container(req);
1359 if (r < 0)
1360 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1361
1362 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1363 link_netlink_destroy_callback, link);
1364 if (r < 0)
1365 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1366
1367 link_ref(link);
9524014e 1368 link->setting_genmode = true;
0e2fdb83
SS		 1369
1370 return 0;
1371}
1372
302a796f 1373static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1374 int r;
1375
1746cf2a
TG		 1376 assert(link);
1377
5da8149f 1378 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1379 return 1;
1380
1c4baffc 1381 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1382 if (r < 0)
26d6b214 1383 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1384 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1385
f882c247
TG		 1386 return 1;
1387}
1388
f282ce20 1389int link_up(Link *link) {
4afd3348 1390 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1391 int r;
1392
f882c247 1393 assert(link);
c106cc36 1394 assert(link->network);
f882c247
TG		 1395 assert(link->manager);
1396 assert(link->manager->rtnl);
1397
6a7a4e4d 1398 log_link_debug(link, "Bringing link up");
449f7554 1399
6a7a4e4d
LP		 1400 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1401 if (r < 0)
1402 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1403
5d4795f3 1404 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1405 if (r < 0)
1406 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1407
302a796f
YW		 1408 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1409 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1410 if (r < 0)
1411 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1412
b226d99b
TG		 1413 link_ref(link);
1414
f882c247
TG		 1415 return 0;
1416}
1417
302a796f 1418static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1419 int r;
1420
1421 assert(link);
1422
1423 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1424 return 1;
1425
1c4baffc 1426 r = sd_netlink_message_get_errno(m);
0d4ad91d 1427 if (r < 0)
5ecb131d 1428 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1429
1430 return 1;
1431}
1432
8e54db83 1433int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1434 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1435 int r;
1436
1437 assert(link);
1438 assert(link->manager);
1439 assert(link->manager->rtnl);
1440
6a7a4e4d 1441 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1442
1443 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1444 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1445 if (r < 0)
1446 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1447
1448 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1449 if (r < 0)
1450 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1451
8e54db83
YW		 1452 r = netlink_call_async(link->manager->rtnl, NULL, req,
1453 callback ?: link_down_handler,
302a796f 1454 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1455 if (r < 0)
1456 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1457
1458 link_ref(link);
1459
1460 return 0;
1461}
1462
89fe6535
SS		 1463static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1464 int r;
1465
1466 assert(link);
1467
1468 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1469 return 1;
1470
1471 r = sd_netlink_message_get_errno(m);
1472 if (r < 0)
1473 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1474
1475 return 1;
1476}
1477
1478static int link_set_group(Link *link) {
1479 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1480 int r;
1481
1482 assert(link);
1483 assert(link->network);
1484 assert(link->manager);
1485 assert(link->manager->rtnl);
1486
1487 if (link->network->group <= 0)
1488 return 0;
1489
1490 log_link_debug(link, "Setting group");
1491
1492 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1493 if (r < 0)
1494 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1495
1496 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1497 if (r < 0)
1498 return log_link_error_errno(link, r, "Could not set link group: %m");
1499
1500 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1501 link_netlink_destroy_callback, link);
1502 if (r < 0)
1503 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1504
1505 link_ref(link);
1506
1507 return 0;
1508}
1509
0d4ad91d
AR		 1510static int link_handle_bound_to_list(Link *link) {
1511 Link *l;
0d4ad91d
AR		 1512 int r;
1513 bool required_up = false;
1514 bool link_is_up = false;
1515
1516 assert(link);
1517
1518 if (hashmap_isempty(link->bound_to_links))
1519 return 0;
1520
1521 if (link->flags & IFF_UP)
1522 link_is_up = true;
1523
90e74a66 1524 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1525 if (link_has_carrier(l)) {
1526 required_up = true;
1527 break;
1528 }
1529
1530 if (!required_up && link_is_up) {
8e54db83 1531 r = link_down(link, NULL);
0d4ad91d
AR		 1532 if (r < 0)
1533 return r;
1534 } else if (required_up && !link_is_up) {
1535 r = link_up(link);
1536 if (r < 0)
1537 return r;
1538 }
1539
1540 return 0;
1541}
1542
1543static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1544 Link *l;
1545 int r;
1546
1547 assert(link);
1548
1549 if (hashmap_isempty(link->bound_by_links))
1550 return 0;
1551
90e74a66 1552 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1553 r = link_handle_bound_to_list(l);
1554 if (r < 0)
1555 return r;
1556 }
1557
1558 return 0;
1559}
1560
1561static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1562 int r;
1563
1564 assert(link);
1565 assert(carrier);
1566
1567 if (link == carrier)
1568 return 0;
1569
1570 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1571 return 0;
1572
190b3b5c 1573 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1574 if (r < 0)
1575 return r;
1576
9092113d
YW		 1577 link_dirty(link);
1578
0d4ad91d
AR		 1579 return 0;
1580}
1581
1582static int link_new_bound_by_list(Link *link) {
1583 Manager *m;
1584 Link *carrier;
0d4ad91d 1585 int r;
0d4ad91d
AR		 1586
1587 assert(link);
1588 assert(link->manager);
1589
1590 m = link->manager;
1591
90e74a66 1592 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1593 if (!carrier->network)
1594 continue;
1595
1596 if (strv_isempty(carrier->network->bind_carrier))
1597 continue;
1598
191a3f16 1599 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1600 r = link_put_carrier(link, carrier, &link->bound_by_links);
1601 if (r < 0)
1602 return r;
0d4ad91d
AR		 1603 }
1604 }
1605
90e74a66 1606 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1607 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1608 if (r < 0)
1609 return r;
0d4ad91d
AR		 1610 }
1611
1612 return 0;
1613}
1614
1615static int link_new_bound_to_list(Link *link) {
1616 Manager *m;
1617 Link *carrier;
0d4ad91d 1618 int r;
0d4ad91d
AR		 1619
1620 assert(link);
1621 assert(link->manager);
1622
1623 if (!link->network)
1624 return 0;
1625
1626 if (strv_isempty(link->network->bind_carrier))
1627 return 0;
1628
1629 m = link->manager;
1630
90e74a66 1631 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1632 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1633 r = link_put_carrier(link, carrier, &link->bound_to_links);
1634 if (r < 0)
1635 return r;
0d4ad91d
AR		 1636 }
1637 }
1638
90e74a66 1639 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1640 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1641 if (r < 0)
1642 return r;
0d4ad91d
AR		 1643 }
1644
1645 return 0;
1646}
1647
1648static int link_new_carrier_maps(Link *link) {
1649 int r;
1650
1651 r = link_new_bound_by_list(link);
1652 if (r < 0)
1653 return r;
1654
1655 r = link_handle_bound_by_list(link);
1656 if (r < 0)
1657 return r;
1658
1659 r = link_new_bound_to_list(link);
1660 if (r < 0)
1661 return r;
1662
1663 r = link_handle_bound_to_list(link);
1664 if (r < 0)
1665 return r;
1666
1667 return 0;
1668}
1669
1670static void link_free_bound_to_list(Link *link) {
9092113d 1671 bool updated = false;
0d4ad91d 1672 Link *bound_to;
0d4ad91d 1673
9092113d
YW		 1674 assert(link);
1675
1676 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1677 updated = true;
0d4ad91d
AR		 1678
1679 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1680 link_dirty(bound_to);
0d4ad91d
AR		 1681 }
1682
9092113d
YW		 1683 if (updated)
1684 link_dirty(link);
1685
0d4ad91d
AR		 1686 return;
1687}
1688
1689static void link_free_bound_by_list(Link *link) {
9092113d 1690 bool updated = false;
0d4ad91d 1691 Link *bound_by;
0d4ad91d 1692
9092113d
YW		 1693 assert(link);
1694
1695 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1696 updated = true;
0d4ad91d
AR		 1697
1698 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1699 link_dirty(bound_by);
0d4ad91d
AR		 1700 link_handle_bound_to_list(bound_by);
1701 }
1702 }
1703
9092113d
YW		 1704 if (updated)
1705 link_dirty(link);
1706
0d4ad91d
AR		 1707 return;
1708}
1709
1710static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1711 assert(link);
1712
9092113d
YW		 1713 link_free_bound_to_list(link);
1714 link_free_bound_by_list(link);
0d4ad91d
AR		 1715
1716 return;
1717}
1718
5f707e12
YW		 1719static int link_append_to_master(Link *link, NetDev *netdev) {
1720 Link *master;
1721 int r;
1722
1723 assert(link);
1724 assert(netdev);
1725
1726 r = link_get(link->manager, netdev->ifindex, &master);
1727 if (r < 0)
1728 return r;
1729
de7fef4b 1730 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1731 if (r <= 0)
5f707e12
YW		 1732 return r;
1733
1734 link_ref(link);
1735 return 0;
1736}
1737
1738static void link_drop_from_master(Link *link, NetDev *netdev) {
1739 Link *master;
1740
1741 assert(link);
1742
1743 if (!link->manager || !netdev)
1744 return;
1745
1746 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1747 return;
1748
1749 link_unref(set_remove(master->slaves, link));
1750}
1751
1752static void link_detach_from_manager(Link *link) {
1753 if (!link || !link->manager)
1754 return;
1755
1756 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1757 link_clean(link);
1758
1759 /* The following must be called at last. */
1760 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1761 link_unref(link);
1762}
1763
3be9d62a 1764static void link_drop(Link *link) {
0d4ad91d
AR		 1765 if (!link || link->state == LINK_STATE_LINGER)
1766 return;
1767
1768 link_set_state(link, LINK_STATE_LINGER);
1769
1770 link_free_carrier_maps(link);
1771
5f707e12 1772 if (link->network) {
c0267a59 1773 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1774 link_drop_from_master(link, link->network->bridge);
1775 link_drop_from_master(link, link->network->bond);
1776 }
1777
6a7a4e4d 1778 log_link_debug(link, "Link removed");
0d4ad91d 1779
db2f8a2e 1780 (void) unlink(link->state_file);
c4397d94 1781 link_detach_from_manager(link);
0d4ad91d
AR		 1782}
1783
04952b25 1784int link_activate(Link *link) {
f882c247
TG		 1785 int r;
1786
ef1ba606 1787 assert(link);
f5be5601 1788 assert(link->network);
dd3efc09 1789
61135582
DS		 1790 switch (link->network->activation_policy) {
1791 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1792 r = link_handle_bound_to_list(link);
1793 if (r < 0)
1794 return r;
61135582
DS		 1795 break;
1796 case ACTIVATION_POLICY_UP:
1797 if (link->activated)
1798 break;
1799 _fallthrough_;
1800 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1801 r = link_up(link);
04952b25 1802 if (r < 0)
505f8da7 1803 return r;
61135582
DS		 1804 break;
1805 case ACTIVATION_POLICY_DOWN:
1806 if (link->activated)
1807 break;
1808 _fallthrough_;
1809 case ACTIVATION_POLICY_ALWAYS_DOWN:
1810 r = link_down(link, NULL);
04952b25 1811 if (r < 0)
61135582 1812 return r;
61135582
DS		 1813 break;
1814 default:
1815 break;
ef1ba606 1816 }
61135582 1817 link->activated = true;
f882c247 1818
04952b25
YW		 1819 return 0;
1820}
1821
1822static int link_joined(Link *link) {
1823 int r;
1824
1825 assert(link);
1826 assert(link->network);
1827
1828 r = link_activate(link);
1829 if (r < 0)
1830 return r;
1831
9ed794a3 1832 if (link->network->bridge) {
e1853b00 1833 r = link_set_bridge(link);
6a7a4e4d
LP		 1834 if (r < 0)
1835 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1836
1837 r = link_append_to_master(link, link->network->bridge);
1838 if (r < 0)
1839 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1840 }
1841
eb64b435 1842 if (link->network->bond) {
7fcee284 1843 r = link_set_bond(link);
eb64b435
SS		 1844 if (r < 0)
1845 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1846
45e11abf 1847 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1848 if (r < 0)
1849 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1850 }
1851
34d7f2c9
YW		 1852 r = link_set_bridge_vlan(link);
1853 if (r < 0)
1854 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1855
c1835a42
RM		 1856 /* Skip setting up addresses until it gets carrier,
1857 or it would try to set addresses twice,
1858 which is bad for non-idempotent steps. */
dad2d78e 1859 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1860 return 0;
1861
b425c3ae 1862 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1863
1864 r = link_acquire_conf(link);
1865 if (r < 0)
1866 return r;
1867
682c65b0 1868 return link_set_static_configs(link);
02b59d57
TG		 1869}
1870
302a796f 1871static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1872 int r;
1873
1746cf2a 1874 assert(link);
ef1ba606 1875 assert(link->network);
34bf3c00 1876 assert(link->enslaving > 0);
02b59d57 1877
313cefa1 1878 link->enslaving--;
52433f6b 1879
5da8149f 1880 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1881 return 1;
1882
1c4baffc 1883 r = sd_netlink_message_get_errno(m);
856f962c 1884 if (r < 0 && r != -EEXIST) {
5ecb131d 1885 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1886 link_enter_failed(link);
1887 return 1;
4ff296b0
YW		 1888 }
1889
1890 log_link_debug(link, "Joined netdev");
02b59d57 1891
34bf3c00 1892 if (link->enslaving == 0) {
4ff296b0
YW		 1893 r = link_joined(link);
1894 if (r < 0)
1895 link_enter_failed(link);
34bf3c00 1896 }
02b59d57
TG		 1897
1898 return 1;
1899}
1900
3f265037 1901static int link_enter_join_netdev(Link *link) {
6a0a2f86 1902 NetDev *netdev;
02b59d57
TG		 1903 int r;
1904
1905 assert(link);
1906 assert(link->network);
bd08ce56 1907 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1908
289e6774 1909 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1910
34bf3c00 1911 link->enslaving = 0;
02b59d57 1912
d9c67ea1 1913 if (link->network->bond) {
cbff7170
TJ		 1914 if (link->network->bond->state == NETDEV_STATE_READY &&
1915 link->network->bond->ifindex == link->master_ifindex)
1916 return link_joined(link);
1917
f2341e0a
LP		 1918 log_struct(LOG_DEBUG,
1919 LOG_LINK_INTERFACE(link),
1920 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1921 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1922
34bf3c00
YW		 1923 link->enslaving++;
1924
f2341e0a 1925 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1926 if (r < 0) {
f2341e0a
LP		 1927 log_struct_errno(LOG_WARNING, r,
1928 LOG_LINK_INTERFACE(link),
1929 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1930 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1931 link_enter_failed(link);
1932 return r;
c0267a59
AW		 1933 }
1934 }
1935
1936 if (link->network->batadv) {
1937 log_struct(LOG_DEBUG,
1938 LOG_LINK_INTERFACE(link),
1939 LOG_NETDEV_INTERFACE(link->network->batadv),
1940 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1941
1942 link->enslaving++;
1943
1944 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1945 if (r < 0) {
1946 log_struct_errno(LOG_WARNING, r,
1947 LOG_LINK_INTERFACE(link),
1948 LOG_NETDEV_INTERFACE(link->network->batadv),
1949 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1950 link_enter_failed(link);
1951 return r;
52433f6b 1952 }
0ad6148e
MO		 1953 }
1954
d9c67ea1 1955 if (link->network->bridge) {
f2341e0a
LP		 1956 log_struct(LOG_DEBUG,
1957 LOG_LINK_INTERFACE(link),
1958 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1959 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1960
34bf3c00
YW		 1961 link->enslaving++;
1962
f2341e0a 1963 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1964 if (r < 0) {
f2341e0a
LP		 1965 log_struct_errno(LOG_WARNING, r,
1966 LOG_LINK_INTERFACE(link),
1967 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1968 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1969 link_enter_failed(link);
1970 return r;
1971 }
52433f6b
TG		 1972 }
1973
6cb955c6
AR		 1974 if (link->network->vrf) {
1975 log_struct(LOG_DEBUG,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1978 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1979
34bf3c00
YW		 1980 link->enslaving++;
1981
6cb955c6
AR		 1982 r = netdev_join(link->network->vrf, link, netdev_join_handler);
1983 if (r < 0) {
1984 log_struct_errno(LOG_WARNING, r,
1985 LOG_LINK_INTERFACE(link),
1986 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 1987 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 1988 link_enter_failed(link);
1989 return r;
1990 }
6cb955c6
AR		 1991 }
1992
90e74a66 1993 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 1994
2b6db913
YW		 1995 if (netdev->ifindex > 0)
1996 /* Assume already enslaved. */
a63e5daa 1997 continue;
a63e5daa 1998
7033af49
YW		 1999 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2000 continue;
2001
f2341e0a
LP		 2002 log_struct(LOG_DEBUG,
2003 LOG_LINK_INTERFACE(link),
2004 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2005 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2006
34bf3c00
YW		 2007 link->enslaving++;
2008
f2341e0a 2009 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2010 if (r < 0) {
f2341e0a
LP		 2011 log_struct_errno(LOG_WARNING, r,
2012 LOG_LINK_INTERFACE(link),
2013 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2014 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2015 link_enter_failed(link);
2016 return r;
2017 }
326cb406
SS		 2018 }
2019
34bf3c00
YW		 2020 if (link->enslaving == 0)
2021 return link_joined(link);
2022
ef1ba606
TG		 2023 return 0;
2024}
2025
5e5b137a 2026static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2027 int k, r;
2028
2029 assert(link);
2030 assert(link->manager);
5e5b137a 2031
e36d601c 2032 r = link_drop_foreign_routes(link);
5e5b137a 2033
e36d601c 2034 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2035 if (k < 0 && r >= 0)
2036 r = k;
2037
e36d601c 2038 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2039 if (k < 0 && r >= 0)
2040 r = k;
d1bdafd2 2041
e36d601c 2042 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2043 if (k < 0 && r >= 0)
2044 r = k;
2045
0b81225e
YW		 2046 k = manager_drop_foreign_routing_policy_rules(link->manager);
2047 if (k < 0 && r >= 0)
2048 r = k;
2049
2050 return r;
5e5b137a
TG		 2051}
2052
3104883d 2053static int link_drop_config(Link *link) {
0b81225e
YW		 2054 int k, r;
2055
2056 assert(link);
2057 assert(link->manager);
3104883d 2058
e36d601c 2059 r = link_drop_routes(link);
3104883d 2060
e36d601c 2061 k = link_drop_nexthops(link);
0b81225e
YW		 2062 if (k < 0 && r >= 0)
2063 r = k;
d1bdafd2 2064
e36d601c 2065 k = link_drop_addresses(link);
0b81225e
YW		 2066 if (k < 0 && r >= 0)
2067 r = k;
2068
e36d601c 2069 k = link_drop_neighbors(link);
25b82b6e
YW		 2070 if (k < 0 && r >= 0)
2071 r = k;
2072
0b81225e
YW		 2073 k = manager_drop_routing_policy_rules(link->manager, link);
2074 if (k < 0 && r >= 0)
2075 r = k;
3104883d 2076
c69305ff
LP		 2077 ndisc_flush(link);
2078
0b81225e 2079 return r;
3104883d
SS		 2080}
2081
19d9a5ad
YW		 2082static void link_drop_requests(Link *link) {
2083 Request *req;
2084
2085 assert(link);
2086 assert(link->manager);
2087
2088 ORDERED_SET_FOREACH(req, link->manager->request_queue)
2089 if (req->link == link)
2090 request_drop(req);
2091}
2092
256c75fd 2093int link_configure(Link *link) {
4ecdcb07
YW		 2094 int r;
2095
ef1ba606 2096 assert(link);
b22d8a00 2097 assert(link->network);
bd08ce56 2098 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2099
34658df2 2100 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2101 if (r < 0)
2102 return r;
2103
518cd6b5
SS		 2104 r = link_configure_sr_iov(link);
2105 if (r < 0)
2106 return r;
2107
500b96eb 2108 if (link->iftype == ARPHRD_CAN)
600b7898 2109 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2110 return link_configure_can(link);
92c918b0 2111
5e0534f1 2112 r = link_set_sysctl(link);
b69c3180
SS		 2113 if (r < 0)
2114 return r;
8749cbcd 2115
e16e4b3b
DS		 2116 r = link_set_mac(link);
2117 if (r < 0)
2118 return r;
2119
2120 r = link_set_nomaster(link);
2121 if (r < 0)
2122 return r;
2123
99d2baa2
SS		 2124 r = link_set_flags(link);
2125 if (r < 0)
2126 return r;
2127
89fe6535
SS		 2128 r = link_set_group(link);
2129 if (r < 0)
2130 return r;
2131
2ffd6d73
YW		 2132 r = ipv4ll_configure(link);
2133 if (r < 0)
2134 return r;
64b21ece 2135
2ffd6d73
YW		 2136 r = dhcp4_configure(link);
2137 if (r < 0)
2138 return r;
eb34d4af 2139
2ffd6d73
YW		 2140 r = dhcp6_configure(link);
2141 if (r < 0)
2142 return r;
f5a8c43f 2143
2ffd6d73
YW		 2144 r = ndisc_configure(link);
2145 if (r < 0)
2146 return r;
4138fb2c 2147
086b8853
YW		 2148 r = radv_configure(link);
2149 if (r < 0)
2150 return r;
7465dd22 2151
2ffd6d73
YW		 2152 r = link_lldp_rx_configure(link);
2153 if (r < 0)
2154 return r;
ce43e484 2155
f6fcc1c2 2156 r = link_configure_mtu(link);
40288ece
YW		 2157 if (r < 0)
2158 return r;
44b598a1 2159
9f6e82e6
YW		 2160 r = link_configure_addrgen_mode(link);
2161 if (r < 0)
2162 return r;
0e2fdb83 2163
3a390124
DS		 2164 return link_configure_continue(link);
2165}
2166
2167/* The configuration continues in this separate function, instead of
2168 * including this in the above link_configure() function, for two
2169 * reasons:
2170 * 1) some devices reset the link when the mtu is set, which caused
2171 * an infinite loop here in networkd; see:
2172 * https://github.com/systemd/systemd/issues/6593
2173 * https://github.com/systemd/systemd/issues/9831
2174 * 2) if ipv6ll is disabled, then bringing the interface up must be
2175 * delayed until after we get confirmation from the kernel that
2176 * the addr_gen_mode parameter has been set (via netlink), see:
2177 * https://github.com/systemd/systemd/issues/13882
2178 */
2179static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2180 int r;
2181
2182 assert(link);
2183 assert(link->network);
bd08ce56 2184 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2185
9524014e 2186 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2187 return 0;
2188
4c649652
DS		 2189 /* Drop foreign config, but ignore loopback or critical devices.
2190 * We do not want to remove loopback address or addresses used for root NFS. */
2191 if (!(link->flags & IFF_LOOPBACK) &&
2192 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2193 r = link_drop_foreign_config(link);
2194 if (r < 0)
2195 return r;
2196 }
2197
d236718c
DS		 2198 /* The kernel resets ipv6 mtu after changing device mtu;
2199 * we must set this here, after we've set device mtu */
2200 r = link_set_ipv6_mtu(link);
2201 if (r < 0)
5e0534f1 2202 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2203
3f265037 2204 return link_enter_join_netdev(link);
505f8da7
TG		 2205}
2206
572b21d9 2207static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2208 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2209 Network *network;
2210 int r;
2211
8bceafa7 2212 assert(m);
572b21d9 2213
8bceafa7
YW		 2214 r = sd_netlink_message_get_errno(m);
2215 if (r < 0)
2216 return r;
572b21d9 2217
8bceafa7
YW		 2218 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2219 if (r < 0 && r != -ENODATA)
2220 return r;
572b21d9 2221
8bceafa7 2222 strv_free_and_replace(link->alternative_names, s);
572b21d9 2223
c643bda5
YW		 2224 r = network_get(link->manager, link->iftype, link->sd_device,
2225 link->ifname, link->alternative_names, link->driver,
b8162cd2 2226 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2227 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2228 if (r == -ENOENT) {
2229 link_enter_unmanaged(link);
2230 return 0;
2231 } else if (r == 0 && network->unmanaged) {
2232 link_enter_unmanaged(link);
2233 return 0;
2234 } else if (r < 0)
2235 return r;
2236
99b8517c 2237 if (link->network == network && !force)
ad932b15
YW		 2238 return 0;
2239
2240 log_link_info(link, "Re-configuring with %s", network->filename);
2241
2242 /* Dropping old .network file */
2a99eed0 2243 r = link_stop_engines(link, false);
572b21d9 2244 if (r < 0)
ad932b15 2245 return r;
ad932b15 2246
19d9a5ad
YW		 2247 link_drop_requests(link);
2248
ad932b15
YW		 2249 r = link_drop_config(link);
2250 if (r < 0)
2251 return r;
2252
2c7b826d 2253 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2254 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2255 r = link_drop_foreign_config(link);
2256 if (r < 0)
2257 return r;
2258 }
2259
2260 link_free_carrier_maps(link);
2261 link_free_engines(link);
2262 link->network = network_unref(link->network);
59c31eba 2263 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2264
2265 /* Then, apply new .network file */
9092113d
YW		 2266 link->network = network_ref(network);
2267 link_dirty(link);
ad932b15
YW		 2268
2269 r = link_new_carrier_maps(link);
2270 if (r < 0)
2271 return r;
2272
2273 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2274 link->activated = false;
ad932b15 2275
ad932b15
YW		 2276 r = link_configure(link);
2277 if (r < 0)
2278 return r;
2279
2280 return 0;
2281}
2282
572b21d9
YW		 2283static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2284 int r;
2285
2286 r = link_reconfigure_internal(link, m, false);
2287 if (r < 0)
2288 link_enter_failed(link);
2289
2290 return 1;
2291}
2292
2293static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2294 int r;
2295
2296 r = link_reconfigure_internal(link, m, true);
2297 if (r < 0)
2298 link_enter_failed(link);
2299
2300 return 1;
2301}
2302
2303int link_reconfigure(Link *link, bool force) {
2304 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2305 int r;
2306
8bceafa7 2307 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2308 * the function from being called multiple times simultaneously, refuse to reconfigure the
2309 * interface in these cases. */
8bceafa7 2310 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2311 return 0; /* 0 means no-op. */
2c0d7ed3 2312
572b21d9
YW		 2313 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2314 link->ifindex);
2315 if (r < 0)
2316 return r;
2317
2318 r = netlink_call_async(link->manager->rtnl, NULL, req,
2319 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2320 link_netlink_destroy_callback, link);
2321 if (r < 0)
2322 return r;
2323
2324 link_ref(link);
2325
8bceafa7 2326 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2327}
2328
e6bf7774 2329static int link_initialized_and_synced(Link *link) {
505f8da7 2330 Network *network;
505f8da7
TG		 2331 int r;
2332
2333 assert(link);
2334 assert(link->ifname);
2335 assert(link->manager);
2336
bd08ce56
YW		 2337 /* We may get called either from the asynchronous netlink callback,
2338 * or directly for link_add() if running in a container. See link_add(). */
2339 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2340 return 0;
505f8da7 2341
6a7a4e4d 2342 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2343 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2344
0d4ad91d
AR		 2345 r = link_new_bound_by_list(link);
2346 if (r < 0)
2347 return r;
2348
2349 r = link_handle_bound_by_list(link);
2350 if (r < 0)
2351 return r;
2352
c4a03a56 2353 if (!link->network) {
0894cfe4 2354 r = wifi_get_info(link);
8d968fdd
YW		 2355 if (r < 0)
2356 return r;
2357
c643bda5
YW		 2358 r = network_get(link->manager, link->iftype, link->sd_device,
2359 link->ifname, link->alternative_names, link->driver,
b8162cd2 2360 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2361 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2362 if (r == -ENOENT) {
2363 link_enter_unmanaged(link);
4232cf04 2364 return 0;
a09dc546
DM		 2365 } else if (r == 0 && network->unmanaged) {
2366 link_enter_unmanaged(link);
2367 return 0;
c4a03a56
TG		 2368 } else if (r < 0)
2369 return r;
505f8da7 2370
c4a03a56
TG		 2371 if (link->flags & IFF_LOOPBACK) {
2372 if (network->link_local != ADDRESS_FAMILY_NO)
2373 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2374
c4a03a56
TG		 2375 if (network->dhcp != ADDRESS_FAMILY_NO)
2376 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2377
c4a03a56
TG		 2378 if (network->dhcp_server)
2379 log_link_debug(link, "Ignoring DHCP server for loopback link");
2380 }
bd2efe92 2381
9092113d
YW		 2382 link->network = network_ref(network);
2383 link_dirty(link);
c4a03a56 2384 }
505f8da7 2385
0d4ad91d
AR		 2386 r = link_new_bound_to_list(link);
2387 if (r < 0)
2388 return r;
2389
a748b692
TG		 2390 r = link_configure(link);
2391 if (r < 0)
2392 return r;
2393
4232cf04 2394 return 0;
505f8da7
TG		 2395}
2396
302a796f 2397static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2398 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2399 int r;
2400
572b21d9
YW		 2401 r = sd_netlink_message_get_errno(m);
2402 if (r < 0) {
40681e5c 2403 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2404 link_enter_failed(link);
2405 return 0;
2406 }
2407
2408 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2409 if (r < 0 && r != -ENODATA) {
2410 link_enter_failed(link);
2411 return 0;
2412 }
2413
2414 strv_free_and_replace(link->alternative_names, s);
2415
4ff296b0
YW		 2416 r = link_initialized_and_synced(link);
2417 if (r < 0)
2418 link_enter_failed(link);
e6bf7774
YW		 2419 return 1;
2420}
2421
3be9d62a 2422static int link_initialized(Link *link, sd_device *device) {
4afd3348 2423 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2424 int r;
2425
2426 assert(link);
2427 assert(link->manager);
2428 assert(link->manager->rtnl);
2429 assert(device);
2430
8434fd5c 2431 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2432 return 0;
2433
51517f9e 2434 if (link->sd_device)
679b3605
TG		 2435 return 0;
2436
79008bdd 2437 log_link_debug(link, "udev initialized link");
bd08ce56 2438 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2439
51517f9e 2440 link->sd_device = sd_device_ref(device);
4f561e8e 2441
3c9b8860
TG		 2442 /* udev has initialized the link, but we don't know if we have yet
2443 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2444 * when it returns we know that the pending NEWLINKs have already been
2445 * processed and that we are up-to-date */
4f561e8e 2446
3c9b8860
TG		 2447 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2448 link->ifindex);
4f561e8e
TG		 2449 if (r < 0)
2450 return r;
2451
302a796f
YW		 2452 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2453 link_netlink_destroy_callback, link);
4f561e8e
TG		 2454 if (r < 0)
2455 return r;
2456
5da8149f
TG		 2457 link_ref(link);
2458
4f561e8e
TG		 2459 return 0;
2460}
2461
3be9d62a 2462static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2463 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2464 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2465 Link *link;
5a937ea2 2466 int r;
505f8da7
TG		 2467
2468 assert(m);
fbbeb65a 2469 assert(m->rtnl);
505f8da7
TG		 2470 assert(message);
2471 assert(ret);
2472
2473 r = link_new(m, message, ret);
2474 if (r < 0)
2475 return r;
2476
2477 link = *ret;
2478
6a7a4e4d 2479 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2480
bf331d87
YW		 2481 if (path_is_read_only_fs("/sys") <= 0) {
2482 /* udev should be around */
ae06ab10 2483 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2484 r = sd_device_new_from_device_id(&device, ifindex_str);
2485 if (r < 0) {
83e7c37b 2486 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2487 return 0;
5c416fc4 2488 }
505f8da7 2489
5a937ea2 2490 r = sd_device_get_is_initialized(device);
51517f9e 2491 if (r < 0) {
bf331d87 2492 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2493 goto failed;
2494 }
5a937ea2 2495 if (r == 0) {
505f8da7 2496 /* not yet ready */
79008bdd 2497 log_link_debug(link, "link pending udev initialization...");
505f8da7 2498 return 0;
3c4cb064 2499 }
505f8da7 2500
299ad32d
YW		 2501 r = device_is_renaming(device);
2502 if (r < 0) {
bf331d87 2503 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2504 goto failed;
2505 }
2506 if (r > 0) {
bf331d87 2507 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2508 return 0;
2509 }
2510
4f561e8e
TG		 2511 r = link_initialized(link, device);
2512 if (r < 0)
5c416fc4 2513 goto failed;
4f561e8e 2514 } else {
e6bf7774 2515 r = link_initialized_and_synced(link);
4f561e8e 2516 if (r < 0)
5c416fc4 2517 goto failed;
4f561e8e 2518 }
505f8da7 2519
a748b692 2520 return 0;
5c416fc4
TG		 2521failed:
2522 link_enter_failed(link);
2523 return r;
a748b692
TG		 2524}
2525
c601ebf7 2526int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2527 int r;
2528
2529 assert(link);
2530
2531 log_link_info(link, "Gained IPv6LL");
2532
c601ebf7 2533 link->ipv6ll_address = *address;
e7ab854c
TG		 2534 link_check_ready(link);
2535
b9ea3d2e 2536 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2537 r = link_acquire_ipv6_conf(link);
2538 if (r < 0) {
2539 link_enter_failed(link);
2540 return r;
2541 }
2542 }
2543
2544 return 0;
2545}
2546
3be9d62a
YW		 2547int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2548 sd_device_action_t action;
2549 Manager *m = userdata;
2550 Link *link = NULL;
2551 int r, ifindex;
2552
2553 assert(m);
2554 assert(device);
2555
2556 r = sd_device_get_action(device, &action);
2557 if (r < 0) {
2558 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2559 return 0;
2560 }
2561
2562 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2563 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2564 * still exists — and we are interested in that. */
2565 if (action == SD_DEVICE_REMOVE)
2566 return 0;
2567
2568 r = sd_device_get_ifindex(device, &ifindex);
2569 if (r < 0) {
2570 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2571 device_action_to_string(action));
2572 return 0;
2573 }
2574
2575 r = device_is_renaming(device);
2576 if (r < 0) {
2577 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2578 device_action_to_string(action));
2579 return 0;
2580 }
2581 if (r > 0) {
2582 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2583 return 0;
2584 }
2585
2586 r = link_get(m, ifindex, &link);
2587 if (r < 0) {
2588 if (r != -ENODEV)
2589 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2590 return 0;
2591 }
2592
2593 (void) link_initialized(link, device);
2594
2595 return 0;
2596}
2597
9c0a72f9
TG		 2598static int link_carrier_gained(Link *link) {
2599 int r;
2600
2601 assert(link);
2602
600b7898
YW		 2603 if (link->iftype == ARPHRD_CAN)
2604 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2605 return link_handle_bound_by_list(link);
2606
0894cfe4 2607 r = wifi_get_info(link);
8d968fdd
YW		 2608 if (r < 0)
2609 return r;
2610 if (r > 0) {
8bceafa7 2611 r = link_reconfigure(link, false);
572b21d9
YW		 2612 if (r < 0) {
2613 link_enter_failed(link);
8d968fdd 2614 return r;
572b21d9 2615 }
8d968fdd
YW		 2616 }
2617
b9ea3d2e 2618 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2619 r = link_acquire_conf(link);
2620 if (r < 0) {
2621 link_enter_failed(link);
2622 return r;
2623 }
6fc25497 2624
b425c3ae 2625 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2626 r = link_set_static_configs(link);
6fc25497
SS		 2627 if (r < 0)
2628 return r;
9c0a72f9
TG		 2629 }
2630
0d4ad91d
AR		 2631 r = link_handle_bound_by_list(link);
2632 if (r < 0)
2633 return r;
2634
1f241589
YW		 2635 if (!link->bridge_mdb_configured) {
2636 r = link_set_bridge_mdb(link);
2637 if (r < 0)
2638 return r;
2639 }
2640
2641 if (streq_ptr(link->kind, "bridge")) {
2642 Link *slave;
2643
2644 SET_FOREACH(slave, link->slaves) {
2645 if (slave->bridge_mdb_configured)
2646 continue;
2647
2648 r = link_set_bridge_mdb(slave);
2649 if (r < 0)
2650 link_enter_failed(slave);
2651 }
2652 }
3db468ea 2653
9c0a72f9
TG		 2654 return 0;
2655}
2656
2657static int link_carrier_lost(Link *link) {
2658 int r;
2659
2660 assert(link);
2661
25e992ba 2662 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2663 return 0;
2664
600b7898
YW		 2665 if (link->iftype == ARPHRD_CAN)
2666 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2667 return link_handle_bound_by_list(link);
2668
fbdb6605 2669 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2670 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2671 * configuration and stop the clients as well. */
97e7fb39
SS		 2672 if (link->setting_mtu)
2673 return 0;
2674
2a99eed0 2675 r = link_stop_engines(link, false);
9c0a72f9
TG		 2676 if (r < 0) {
2677 link_enter_failed(link);
2678 return r;
2679 }
2680
19d9a5ad
YW		 2681 link_drop_requests(link);
2682
3104883d
SS		 2683 r = link_drop_config(link);
2684 if (r < 0)
2685 return r;
2686
2c7b826d 2687 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2688 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2689 r = link_drop_foreign_config(link);
2690 if (r < 0)
2691 return r;
2692 }
3104883d 2693
0d4ad91d
AR		 2694 r = link_handle_bound_by_list(link);
2695 if (r < 0)
2696 return r;
2697
9c0a72f9
TG		 2698 return 0;
2699}
2700
2701int link_carrier_reset(Link *link) {
2702 int r;
2703
2704 assert(link);
2705
2706 if (link_has_carrier(link)) {
2707 r = link_carrier_lost(link);
2708 if (r < 0)
2709 return r;
2710
2711 r = link_carrier_gained(link);
2712 if (r < 0)
2713 return r;
2714
6a7a4e4d 2715 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2716 }
2717
2718 return 0;
2719}
2720
d236718c
DS		 2721static int link_admin_state_up(Link *link) {
2722 int r;
2723
61135582
DS		 2724 assert(link);
2725
3be9d62a
YW		 2726 /* This is called every time an interface admin state changes to up;
2727 * specifically, when IFF_UP flag changes from unset to set. */
2728
61135582
DS		 2729 if (!link->network)
2730 return 0;
2731
2732 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2733 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2734 return link_down(link, NULL);
2735 }
2736
d236718c
DS		 2737 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2738 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2739 * ipv6_mtu_set prevents this from trying to set it too early before
2740 * the link->network has been setup; we only need to reset it
2741 * here if we've already set it during normal initialization. */
2742 if (link->ipv6_mtu_set) {
2743 r = link_set_ipv6_mtu(link);
2744 if (r < 0)
2745 return r;
2746 }
2747
2748 return 0;
2749}
2750
61135582 2751static int link_admin_state_down(Link *link) {
61135582
DS		 2752 assert(link);
2753
2754 if (!link->network)
2755 return 0;
2756
2757 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2758 if (streq_ptr(link->kind, "can") && !link->can_configured)
2759 /* CAN device needs to be down on configure. */
2760 return 0;
2761
61135582
DS		 2762 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2763 return link_up(link);
2764 }
2765
2766 return 0;
2767}
2768
3be9d62a 2769static int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2770 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2771 hw_addr_data hw_addr;
ca4e095a 2772 const char *ifname;
afe7fd56 2773 uint32_t mtu;
d236718c 2774 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2775 int old_master, r;
22936833 2776
dd3efc09 2777 assert(link);
b8941f74 2778 assert(link->ifname);
22936833
TG		 2779 assert(m);
2780
7619683b 2781 if (link->state == LINK_STATE_LINGER) {
5238e957 2782 log_link_info(link, "Link re-added");
289e6774 2783 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2784
2785 r = link_new_carrier_maps(link);
2786 if (r < 0)
2787 return r;
7619683b
TG		 2788 }
2789
1c4baffc 2790 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2791 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2792 Manager *manager = link->manager;
b8941f74 2793
30de2b89 2794 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2795
30de2b89
YW		 2796 link_drop(link);
2797 r = link_add(manager, m, &link);
2798 if (r < 0)
2799 return r;
b8941f74
TG		 2800 }
2801
572b21d9
YW		 2802 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2803 if (r >= 0)
2804 strv_free_and_replace(link->alternative_names, s);
2805
1c4baffc 2806 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2807 if (r >= 0 && mtu > 0) {
2808 link->mtu = mtu;
4e964aa0 2809 if (link->original_mtu == 0) {
afe7fd56 2810 link->original_mtu = mtu;
6a7a4e4d 2811 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2812 }
2813
2814 if (link->dhcp_client) {
3c9b8860
TG		 2815 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2816 link->mtu);
fc95c359
YW		 2817 if (r < 0)
2818 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2819 }
7465dd22
PF		 2820
2821 if (link->radv) {
2822 r = sd_radv_set_mtu(link->radv, link->mtu);
2823 if (r < 0)
2824 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2825 }
9842de0d 2826 }
69629de9 2827
e9189a1f
TG		 2828 /* The kernel may broadcast NEWLINK messages without the MAC address
2829 set, simply ignore them. */
b8162cd2
TR		 2830 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2831 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2832 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2833
b8162cd2 2834 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2835
b8162cd2 2836 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2837
a3adb4a6
YW		 2838 r = ipv4ll_update_mac(link);
2839 if (r < 0)
2840 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2841
d947f7f9
YW		 2842 r = dhcp4_update_mac(link);
2843 if (r < 0)
2844 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2845
eebba6dc
YW		 2846 r = dhcp6_update_mac(link);
2847 if (r < 0)
2848 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2849
d0c4275c 2850 r = radv_update_mac(link);
be9363cc
YW		 2851 if (r < 0)
2852 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2853
2854 if (link->ndisc) {
b8162cd2 2855 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2856 if (r < 0)
2857 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2858 }
d93d655c 2859
dfc58b47
YW		 2860 if (link->lldp) {
2861 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
2862 if (r < 0)
2863 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
2864 }
2865
d93d655c
YW		 2866 r = ipv4_dad_update_mac(link);
2867 if (r < 0)
2868 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2869 }
2870
bb262ef0
YW		 2871 old_master = link->master_ifindex;
2872 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2873
d236718c 2874 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2875 had_carrier = link_has_carrier(link);
2876
bb262ef0 2877 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2878 if (r < 0)
2879 return r;
2880
d236718c
DS		 2881 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2882 log_link_info(link, "Link UP");
2883
2884 r = link_admin_state_up(link);
2885 if (r < 0)
2886 return r;
61135582 2887 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2888 log_link_info(link, "Link DOWN");
2889
61135582
DS		 2890 r = link_admin_state_down(link);
2891 if (r < 0)
2892 return r;
2893 }
2894
273eec24
LP		 2895 r = link_update_lldp(link);
2896 if (r < 0)
2897 return r;
2898
a61bb41c
TG		 2899 carrier_gained = !had_carrier && link_has_carrier(link);
2900 carrier_lost = had_carrier && !link_has_carrier(link);
2901
2902 if (carrier_gained) {
6a7a4e4d 2903 log_link_info(link, "Gained carrier");
a61bb41c 2904
9c0a72f9
TG		 2905 r = link_carrier_gained(link);
2906 if (r < 0)
2907 return r;
a61bb41c 2908 } else if (carrier_lost) {
6a7a4e4d 2909 log_link_info(link, "Lost carrier");
a61bb41c 2910
9c0a72f9
TG		 2911 r = link_carrier_lost(link);
2912 if (r < 0)
a61bb41c 2913 return r;
a61bb41c
TG		 2914 }
2915
2916 return 0;
dd3efc09 2917}
fe8db0c5 2918
3be9d62a
YW		 2919int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2920 Link *link = NULL;
2921 NetDev *netdev = NULL;
2922 uint16_t type;
2923 const char *name;
2924 int r, ifindex;
2925
2926 assert(rtnl);
2927 assert(message);
2928 assert(m);
2929
2930 if (sd_netlink_message_is_error(message)) {
2931 r = sd_netlink_message_get_errno(message);
2932 if (r < 0)
2933 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2934
2935 return 0;
2936 }
2937
2938 r = sd_netlink_message_get_type(message, &type);
2939 if (r < 0) {
2940 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2941 return 0;
2942 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2943 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2944 return 0;
2945 }
2946
2947 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2948 if (r < 0) {
2949 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2950 return 0;
2951 } else if (ifindex <= 0) {
2952 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2953 return 0;
2954 }
2955
2956 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2957 if (r < 0) {
2958 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2959 return 0;
2960 }
2961
2962 (void) link_get(m, ifindex, &link);
2963 (void) netdev_get(m, name, &netdev);
2964
2965 switch (type) {
2966 case RTM_NEWLINK:
2967 if (!link) {
2968 /* link is new, so add it */
2969 r = link_add(m, message, &link);
2970 if (r < 0) {
2971 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2972 return 0;
2973 }
2974 }
2975
2976 if (netdev) {
2977 /* netdev exists, so make sure the ifindex matches */
2978 r = netdev_set_ifindex(netdev, message);
2979 if (r < 0) {
2980 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2981 return 0;
2982 }
2983 }
2984
2985 r = link_update(link, message);
2986 if (r < 0) {
2987 log_warning_errno(r, "Could not process link message, ignoring: %m");
2988 return 0;
2989 }
2990
2991 break;
2992
2993 case RTM_DELLINK:
2994 link_drop(link);
2995 netdev_drop(netdev);
2996
2997 break;
2998
2999 default:
3000 assert_not_reached("Received link message with invalid RTNL message type.");
3001 }
3002
3003 return 1;
3004}
3005
fe8db0c5 3006static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3007 [LINK_STATE_PENDING] = "pending",
bd08ce56 3008 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3009 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3010 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3011 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3012 [LINK_STATE_FAILED] = "failed",
370e9930 3013 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3014};
3015
3016DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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