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network: introduce link_is_ready_to_configure() helper function
[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
7191a57a
YW		 137bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
138 assert(link);
139
140 if (!link->network || link->network->unmanaged) {
141 if (!allow_unmanaged)
142 return false;
143
144 return link_has_carrier(link);
145 }
146
147 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
148 return false;
149
150 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
151 return false;
152
153 return true;
154}
155
34bf3c00
YW		 156static bool link_is_enslaved(Link *link) {
157 if (link->flags & IFF_SLAVE)
158 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
159 return true;
160
34bf3c00
YW		 161 if (!link->network)
162 return false;
163
bb262ef0 164 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 165 return true;
166
bb262ef0
YW		 167 /* TODO: add conditions for other netdevs. */
168
34bf3c00
YW		 169 return false;
170}
171
45e11abf
YW		 172static void link_update_master_operstate(Link *link, NetDev *netdev) {
173 Link *master;
174
175 if (!netdev)
176 return;
177
7936917e
YW		 178 if (netdev->ifindex <= 0)
179 return;
180
45e11abf
YW		 181 if (link_get(link->manager, netdev->ifindex, &master) < 0)
182 return;
183
184 link_update_operstate(master, true);
185}
186
8430841b
L		 187static LinkAddressState address_state_from_scope(uint8_t scope) {
188 if (scope < RT_SCOPE_SITE)
189 /* universally accessible addresses found */
190 return LINK_ADDRESS_STATE_ROUTABLE;
191
192 if (scope < RT_SCOPE_HOST)
193 /* only link or site local addresses found */
194 return LINK_ADDRESS_STATE_DEGRADED;
195
196 /* no useful addresses found */
197 return LINK_ADDRESS_STATE_OFF;
198}
199
45e11abf 200void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 201 LinkOperationalState operstate;
1678fbb3 202 LinkCarrierState carrier_state;
8430841b 203 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
35c5a9ca 204 _cleanup_strv_free_ char **p = NULL;
90afec18 205 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
35c5a9ca 206 bool changed = false;
1678fbb3 207 Address *address;
14153d1b 208
84de38c5
TG		 209 assert(link);
210
211 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 212 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 213 else if (link_has_carrier(link)) {
1678fbb3
YW		 214 if (link_is_enslaved(link))
215 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 216 else
1678fbb3 217 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 218 } else if (link->flags & IFF_UP)
1678fbb3 219 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 220 else
1678fbb3 221 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 222
1678fbb3 223 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 224 Link *slave;
225
90e74a66 226 SET_FOREACH(slave, link->slaves) {
959f65d3 227 link_update_operstate(slave, false);
84de38c5 228
1678fbb3
YW		 229 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
230 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 231 }
959f65d3 232 }
84de38c5 233
90e74a66 234 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 235 if (!address_is_ready(address))
236 continue;
84de38c5 237
90afec18
YW		 238 if (address->family == AF_INET)
239 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 240
90afec18
YW		 241 if (address->family == AF_INET6)
242 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3 243 }
84de38c5 244
1678fbb3 245 /* for operstate we also take foreign addresses into account */
90e74a66 246 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 247 if (!address_is_ready(address))
248 continue;
249
90afec18
YW		 250 if (address->family == AF_INET)
251 ipv4_scope = MIN(ipv4_scope, address->scope);
8430841b 252
90afec18
YW		 253 if (address->family == AF_INET6)
254 ipv6_scope = MIN(ipv6_scope, address->scope);
1678fbb3
YW		 255 }
256
8430841b
L		 257 ipv4_address_state = address_state_from_scope(ipv4_scope);
258 ipv6_address_state = address_state_from_scope(ipv6_scope);
90afec18 259 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1678fbb3
YW		 260
261 /* Mapping of address and carrier state vs operational state
262 * carrier state
263 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
264 * ------------------------------------------------------------------------------
265 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
266 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
267 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
268 */
84de38c5 269
1678fbb3
YW		 270 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
271 operstate = (LinkOperationalState) carrier_state;
272 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
273 operstate = LINK_OPERSTATE_ROUTABLE;
274 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
275 operstate = LINK_OPERSTATE_DEGRADED;
276 else
14153d1b
YW		 277 operstate = LINK_OPERSTATE_ENSLAVED;
278
35c5a9ca
YW		 279 if (link->carrier_state != carrier_state) {
280 link->carrier_state = carrier_state;
281 changed = true;
282 if (strv_extend(&p, "CarrierState") < 0)
283 log_oom();
284 }
959f65d3 285
35c5a9ca
YW		 286 if (link->address_state != address_state) {
287 link->address_state = address_state;
288 changed = true;
289 if (strv_extend(&p, "AddressState") < 0)
290 log_oom();
959f65d3
YW		 291 }
292
8430841b
L		 293 if (link->ipv4_address_state != ipv4_address_state) {
294 link->ipv4_address_state = ipv4_address_state;
295 changed = true;
296 if (strv_extend(&p, "IPv4AddressState") < 0)
297 log_oom();
298 }
299
300 if (link->ipv6_address_state != ipv6_address_state) {
301 link->ipv6_address_state = ipv6_address_state;
302 changed = true;
303 if (strv_extend(&p, "IPv6AddressState") < 0)
304 log_oom();
305 }
306
84de38c5
TG		 307 if (link->operstate != operstate) {
308 link->operstate = operstate;
35c5a9ca
YW		 309 changed = true;
310 if (strv_extend(&p, "OperationalState") < 0)
311 log_oom();
84de38c5 312 }
959f65d3 313
35c5a9ca
YW		 314 if (p)
315 link_send_changed_strv(link, p);
316 if (changed)
317 link_dirty(link);
318
45e11abf 319 if (also_update_master && link->network) {
c0267a59 320 link_update_master_operstate(link, link->network->batadv);
45e11abf
YW		 321 link_update_master_operstate(link, link->network->bond);
322 link_update_master_operstate(link, link->network->bridge);
959f65d3 323 }
84de38c5
TG		 324}
325
51d18171
TG		 326#define FLAG_STRING(string, flag, old, new) \
327 (((old ^ new) & flag) \
328 ? ((old & flag) ? (" -" string) : (" +" string)) \
329 : "")
330
bb262ef0 331static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 332 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
333 uint8_t operstate;
334 int r;
335
336 assert(link);
337
338 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 339 if (r < 0)
340 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 341
1c4baffc 342 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 343 if (r < 0)
344 /* if we got a message without operstate, take it to mean
345 the state was unchanged */
346 operstate = link->kernel_operstate;
347
bb262ef0 348 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 349 return 0;
350
351 if (link->flags != flags) {
6a7a4e4d 352 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		 353 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
354 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
355 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
356 FLAG_STRING("UP", IFF_UP, link->flags, flags),
357 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
358 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
359 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
360 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
361 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
362 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
363 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
364 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
365 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
366 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
367 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
368 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
369 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
370 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
371 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
372
373 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
374 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
375 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
376 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
377 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
378 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
379 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
380 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
381
382 /* link flags are currently at most 18 bits, let's align to
383 * printing 20 */
384 if (unknown_flags_added)
79008bdd 385 log_link_debug(link,
6a7a4e4d 386 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 387 unknown_flags_added);
388
389 if (unknown_flags_removed)
79008bdd 390 log_link_debug(link,
6a7a4e4d 391 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 392 unknown_flags_removed);
393 }
394
395 link->flags = flags;
396 link->kernel_operstate = operstate;
397
959f65d3 398 link_update_operstate(link, true);
51d18171
TG		 399
400 return 0;
401}
402
1c4baffc 403static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 404 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 405 const char *ifname, *kind = NULL;
b710e6b6 406 unsigned short iftype;
572b21d9
YW		 407 int r, ifindex;
408 uint16_t type;
f579559b 409
0c2f9b84 410 assert(manager);
505f8da7 411 assert(message);
f579559b
TG		 412 assert(ret);
413
6cad256d
TJ		 414 /* check for link kind */
415 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
416 if (r == 0) {
db2f8a2e 417 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 418 r = sd_netlink_message_exit_container(message);
419 if (r < 0)
420 return r;
421 }
422
1c4baffc 423 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 424 if (r < 0)
425 return r;
426 else if (type != RTM_NEWLINK)
427 return -EINVAL;
428
429 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
430 if (r < 0)
431 return r;
432 else if (ifindex <= 0)
433 return -EINVAL;
434
b710e6b6
LP		 435 r = sd_rtnl_message_link_get_type(message, &iftype);
436 if (r < 0)
437 return r;
438
1c4baffc 439 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 440 if (r < 0)
441 return r;
442
17f9c355 443 link = new(Link, 1);
f579559b
TG		 444 if (!link)
445 return -ENOMEM;
446
17f9c355
YW		 447 *link = (Link) {
448 .n_ref = 1,
449 .manager = manager,
450 .state = LINK_STATE_PENDING,
17f9c355
YW		 451 .ifindex = ifindex,
452 .iftype = iftype,
15761549 453
f5fbe71d 454 .n_dns = UINT_MAX,
15761549
YW		 455 .dns_default_route = -1,
456 .llmnr = _RESOLVE_SUPPORT_INVALID,
457 .mdns = _RESOLVE_SUPPORT_INVALID,
458 .dnssec_mode = _DNSSEC_MODE_INVALID,
459 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 460 };
461
505f8da7
TG		 462 link->ifname = strdup(ifname);
463 if (!link->ifname)
464 return -ENOMEM;
f579559b 465
6cad256d
TJ		 466 if (kind) {
467 link->kind = strdup(kind);
468 if (!link->kind)
469 return -ENOMEM;
470 }
471
cbff7170
TJ		 472 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
473 if (r < 0)
474 log_link_debug_errno(link, r, "New device has no master, continuing without");
475
b8162cd2 476 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
512922f8 477 if (r < 0)
b8162cd2 478 log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without");
512922f8 479
14b66dbc
TR		 480 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
481 if (r < 0)
482 log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without");
483
c643bda5 484 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 485 if (r < 0)
486 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
487
c643bda5
YW		 488 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
489 if (r < 0)
490 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
491
572b21d9
YW		 492 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
493 if (r < 0 && r != -ENODATA)
494 return r;
495
34437b4f 496 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 497 return -ENOMEM;
fe8db0c5 498
34437b4f 499 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 500 return -ENOMEM;
501
34437b4f 502 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 503 return -ENOMEM;
504
967d72ed 505 r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 506 if (r < 0)
507 return r;
508
bb262ef0 509 r = link_update_flags(link, message, false);
51d18171
TG		 510 if (r < 0)
511 return r;
512
1cc6c93a 513 *ret = TAKE_PTR(link);
f579559b
TG		 514
515 return 0;
516}
517
15761549
YW		 518void link_ntp_settings_clear(Link *link) {
519 link->ntp = strv_free(link->ntp);
520}
521
522void link_dns_settings_clear(Link *link) {
f5fbe71d 523 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 524 for (unsigned i = 0; i < link->n_dns; i++)
525 in_addr_full_free(link->dns[i]);
15761549 526 link->dns = mfree(link->dns);
f5fbe71d 527 link->n_dns = UINT_MAX;
15761549 528
6e4571f0
YW		 529 link->search_domains = ordered_set_free(link->search_domains);
530 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 531
532 link->dns_default_route = -1;
533 link->llmnr = _RESOLVE_SUPPORT_INVALID;
534 link->mdns = _RESOLVE_SUPPORT_INVALID;
535 link->dnssec_mode = _DNSSEC_MODE_INVALID;
536 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
537
538 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
539}
540
1a6bb31f
YW		 541static void link_free_engines(Link *link) {
542 if (!link)
543 return;
544
545 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
546 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
547 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 548 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 549
550 link->lldp = sd_lldp_unref(link->lldp);
1c494872 551 link_lldp_emit_stop(link);
1a6bb31f
YW		 552
553 ndisc_flush(link);
554
555 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
556 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 557 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 558 link->ndisc = sd_ndisc_unref(link->ndisc);
559 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 560
561 ipv4_dad_unref(link);
1a6bb31f
YW		 562}
563
8301aa0b 564static Link *link_free(Link *link) {
8301aa0b 565 assert(link);
f579559b 566
15761549
YW		 567 link_ntp_settings_clear(link);
568 link_dns_settings_clear(link);
569
8eec0b9d
YW		 570 link->routes = set_free(link->routes);
571 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 572 link->dhcp_routes = set_free(link->dhcp_routes);
573 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 574 link->dhcp6_routes = set_free(link->dhcp6_routes);
575 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
576 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
577 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 578 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 579
8eec0b9d
YW		 580 link->nexthops = set_free(link->nexthops);
581 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 582
8eec0b9d
YW		 583 link->neighbors = set_free(link->neighbors);
584 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 585
8eec0b9d
YW		 586 link->addresses = set_free(link->addresses);
587 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 588 link->pool_addresses = set_free(link->pool_addresses);
e5526518 589 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 590 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
591 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
592 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
593 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 594 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 595
4b409e85
YW		 596 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
597
1a6bb31f 598 link_free_engines(link);
49699bac 599
c166a070 600 free(link->ifname);
572b21d9 601 strv_free(link->alternative_names);
ceac4078 602 free(link->kind);
8d968fdd 603 free(link->ssid);
c643bda5 604 free(link->driver);
6cad256d 605
a34e58d4
YW		 606 unlink_and_free(link->lease_file);
607 unlink_and_free(link->lldp_file);
608 unlink_and_free(link->state_file);
c166a070 609
51517f9e 610 sd_device_unref(link->sd_device);
b5db00e5 611
0d4ad91d 612 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 613 hashmap_free(link->bound_by_links);
614
5f707e12 615 set_free_with_destructor(link->slaves, link_unref);
033295c1 616
c9c908a6
YW		 617 network_unref(link->network);
618
8301aa0b 619 return mfree(link);
14b746f7
TG		 620}
621
8301aa0b 622DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 623
11a7f229
TG		 624int link_get(Manager *m, int ifindex, Link **ret) {
625 Link *link;
11a7f229
TG		 626
627 assert(m);
e856ed00 628 assert(ifindex > 0);
11a7f229
TG		 629 assert(ret);
630
ae06ab10 631 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 632 if (!link)
633 return -ENODEV;
634
635 *ret = link;
636
637 return 0;
638}
639
af9ba57a 640void link_set_state(Link *link, LinkState state) {
e331e246
TG		 641 assert(link);
642
643 if (link->state == state)
644 return;
645
0beb9542
YW		 646 log_link_debug(link, "State changed: %s -> %s",
647 link_state_to_string(link->state),
648 link_state_to_string(state));
649
e331e246
TG		 650 link->state = state;
651
652 link_send_changed(link, "AdministrativeState", NULL);
9092113d 653 link_dirty(link);
e331e246
TG		 654}
655
57bd6899
TG		 656static void link_enter_unmanaged(Link *link) {
657 assert(link);
658
e331e246 659 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899
TG		 660}
661
2a99eed0 662int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 663 int r = 0, k;
664
665 assert(link);
666 assert(link->manager);
667 assert(link->manager->event);
668
80060352
ZJS		 669 bool keep_dhcp = may_keep_dhcp &&
670 link->network &&
671 (link->manager->restarting ||
672 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
673
84add3cd 674 if (!keep_dhcp) {
111bb8f9 675 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 676 if (k < 0)
36c7d709 677 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 678 }
679
84add3cd
YW		 680 k = sd_ipv4acd_stop(link->dhcp_acd);
681 if (k < 0)
682 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 683
2a99eed0
YW		 684 k = sd_dhcp_server_stop(link->dhcp_server);
685 if (k < 0)
686 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
687
9cc65242
YW		 688 k = sd_lldp_stop(link->lldp);
689 if (k < 0)
690 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
691
84add3cd
YW		 692 k = sd_ipv4ll_stop(link->ipv4ll);
693 if (k < 0)
694 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 695
490ccbd5 696 k = ipv4_dad_stop(link);
2488e4d9
YW		 697 if (k < 0)
698 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 699
84add3cd
YW		 700 k = sd_dhcp6_client_stop(link->dhcp6_client);
701 if (k < 0)
702 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 703
2ffd6d73
YW		 704 k = dhcp6_pd_remove(link);
705 if (k < 0)
706 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 707
84add3cd
YW		 708 k = sd_ndisc_stop(link->ndisc);
709 if (k < 0)
710 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 711
84add3cd
YW		 712 k = sd_radv_stop(link->radv);
713 if (k < 0)
714 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 715
7272b25e 716 link_lldp_emit_stop(link);
111bb8f9
TG		 717 return r;
718}
719
b22d8a00 720void link_enter_failed(Link *link) {
ef1ba606 721 assert(link);
f882c247 722
370e9930 723 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 724 return;
725
6a7a4e4d 726 log_link_warning(link, "Failed");
449f7554 727
e331e246 728 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 729
2a99eed0 730 (void) link_stop_engines(link, false);
f882c247
TG		 731}
732
7033af49
YW		 733static int link_join_netdevs_after_configured(Link *link) {
734 NetDev *netdev;
7033af49
YW		 735 int r;
736
90e74a66 737 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 738 if (netdev->ifindex > 0)
739 /* Assume already enslaved. */
740 continue;
741
742 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
743 continue;
744
745 log_struct(LOG_DEBUG,
746 LOG_LINK_INTERFACE(link),
747 LOG_NETDEV_INTERFACE(netdev),
748 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
749
750 r = netdev_join(netdev, link, NULL);
751 if (r < 0)
752 return log_struct_errno(LOG_WARNING, r,
753 LOG_LINK_INTERFACE(link),
754 LOG_NETDEV_INTERFACE(netdev),
755 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
756 }
757
758 return 0;
759}
760
e3a7b048 761static void link_enter_configured(Link *link) {
dd43110f
TG		 762 assert(link);
763 assert(link->network);
e3a7b048 764
289e6774 765 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 766 return;
dd43110f 767
e331e246 768 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 769
7033af49 770 (void) link_join_netdevs_after_configured(link);
dd43110f
TG		 771}
772
6accfd31
DA		 773void link_check_ready(Link *link) {
774 Address *a;
6accfd31
DA		 775
776 assert(link);
777
5f58af25
YW		 778 if (link->state == LINK_STATE_CONFIGURED)
779 return;
780
d19b9939
YW		 781 if (link->state != LINK_STATE_CONFIGURING)
782 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 783
784 if (!link->network)
785 return;
786
600b7898
YW		 787 if (link->iftype == ARPHRD_CAN) {
788 /* let's shortcut things for CAN which doesn't need most of checks below. */
789 if (!link->can_configured)
790 return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__);
791
792 link_enter_configured(link);
793 return;
794 }
795
d19b9939
YW		 796 if (!link->addresses_configured)
797 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 798
d19b9939
YW		 799 if (!link->neighbors_configured)
800 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 801
90e74a66 802 SET_FOREACH(a, link->addresses)
39373cb9
YW		 803 if (!address_is_ready(a)) {
804 _cleanup_free_ char *str = NULL;
805
5380707a
YW		 806 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
807 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 808 }
6aa5773b 809
d19b9939
YW		 810 if (!link->static_routes_configured)
811 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 812
d19b9939
YW		 813 if (!link->static_nexthops_configured)
814 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 815
d19b9939
YW		 816 if (!link->routing_policy_rules_configured)
817 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 818
d19b9939
YW		 819 if (!link->tc_configured)
820 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 821
d19b9939
YW		 822 if (!link->sr_iov_configured)
823 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 824
d19b9939
YW		 825 if (!link->bridge_mdb_configured)
826 return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1f241589 827
463797c1 828 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 829 bool has_ndisc_address = false;
830 NDiscAddress *n;
6accfd31 831
94876904
YW		 832 if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address))
833 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
6accfd31 834
90e74a66 835 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 836 if (!n->marked) {
837 has_ndisc_address = true;
838 break;
839 }
840
8cd37e43 841 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
50550722 842 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
0d0799da
YW		 843 !link->ipv4ll_address_configured)
844 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
845 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0 846
0d0799da
YW		 847 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
848 link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) {
39373cb9
YW		 849 if (!link->dhcp4_configured &&
850 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
851 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 852 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da
YW		 853 !link->ipv4ll_address_configured)
854 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
d19b9939 855 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
39373cb9 856
0d0799da 857 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		 858 __func__,
859 yes_no(link->dhcp4_configured),
0d0799da 860 yes_no(link->ipv4ll_address_configured),
39373cb9
YW		 861 yes_no(link->dhcp6_address_configured),
862 yes_no(link->dhcp6_route_configured),
863 yes_no(link->dhcp6_pd_address_configured),
864 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 865 yes_no(link->ndisc_addresses_configured),
866 yes_no(link->ndisc_routes_configured));
39373cb9 867 }
463797c1 868 }
6accfd31 869
5f58af25 870 link_enter_configured(link);
6accfd31
DA		 871}
872
682c65b0 873static int link_set_static_configs(Link *link) {
f882c247
TG		 874 int r;
875
876 assert(link);
877 assert(link->network);
f5be5601 878 assert(link->state != _LINK_STATE_INVALID);
f882c247 879
2428613f 880 /* Reset all *_configured flags we are configuring. */
9b966cee 881 link->request_static_addresses = false;
2428613f 882 link->addresses_configured = false;
6aa5773b 883 link->addresses_ready = false;
2428613f
YW		 884 link->neighbors_configured = false;
885 link->static_routes_configured = false;
c16c7808 886 link->static_nexthops_configured = false;
2428613f
YW		 887 link->routing_policy_rules_configured = false;
888
f6bb7ac5
TJ		 889 r = link_set_bridge_fdb(link);
890 if (r < 0)
891 return r;
892
1f241589
YW		 893 r = link_set_bridge_mdb(link);
894 if (r < 0)
895 return r;
896
58f1fe9a 897 r = link_set_neighbors(link);
f3ef324d
YW		 898 if (r < 0)
899 return r;
e4a71bf3 900
682c65b0
YW		 901 r = link_set_addresses(link);
902 if (r < 0)
903 return r;
bd6379ec 904
fe2bc17c
YW		 905 r = link_set_address_labels(link);
906 if (r < 0)
907 return r;
f882c247 908
e5526518 909 /* now that we can figure out a default address for the dhcp server, start it */
5ae0fb7f
YW		 910 r = dhcp4_server_configure(link);
911 if (r < 0)
912 return r;
d4cdbea5 913
f882c247
TG		 914 return 0;
915}
916
3a390124 917static int link_configure_continue(Link *link);
55dc8c4a 918
e16e4b3b
DS		 919static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
920 int r;
921
922 assert(link);
923
924 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
925 return 1;
926
927 r = sd_netlink_message_get_errno(m);
928 if (r < 0)
929 log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring");
930 else
931 log_link_debug(link, "Setting MAC address done.");
932
933 return 1;
934}
935
936static int link_set_mac(Link *link) {
937 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
938 int r;
939
940 assert(link);
941 assert(link->network);
942 assert(link->manager);
943 assert(link->manager->rtnl);
944
945 if (!link->network->mac)
946 return 0;
947
948 log_link_debug(link, "Setting MAC address");
949
950 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
951 if (r < 0)
952 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
953
954 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
955 if (r < 0)
956 return log_link_error_errno(link, r, "Could not set MAC address: %m");
957
958 r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler,
959 link_netlink_destroy_callback, link);
960 if (r < 0)
961 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
962
963 link_ref(link);
964
965 return 0;
966}
967
968static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
969 int r;
970
971 assert(link);
972
973 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
974 return 1;
975
976 r = sd_netlink_message_get_errno(m);
977 if (r < 0)
978 log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring");
979 else
980 log_link_debug(link, "Setting nomaster done.");
981
982 return 1;
983}
984
985static int link_set_nomaster(Link *link) {
986 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
987 int r;
988
989 assert(link);
990 assert(link->network);
991 assert(link->manager);
992 assert(link->manager->rtnl);
993
994 /* set it free if not enslaved with networkd */
c0267a59 995 if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf)
e16e4b3b
DS		 996 return 0;
997
998 log_link_debug(link, "Setting nomaster");
999
1000 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1001 if (r < 0)
1002 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1003
1004 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1005 if (r < 0)
1006 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1007
1008 r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler,
1009 link_netlink_destroy_callback, link);
1010 if (r < 0)
1011 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1012
1013 link_ref(link);
1014
1015 return 0;
1016}
1017
302a796f 1018static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1019 int r;
1020
1021 assert(m);
1022 assert(link);
1023 assert(link->ifname);
1024
55dc8c4a
YW		 1025 link->setting_mtu = false;
1026
5da8149f 1027 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1028 return 1;
1029
1c4baffc 1030 r = sd_netlink_message_get_errno(m);
4ff296b0 1031 if (r < 0)
5ecb131d 1032 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1033 else
1034 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1035
4ff296b0 1036 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1037 r = link_configure_continue(link);
4ff296b0
YW		 1038 if (r < 0)
1039 link_enter_failed(link);
1040 }
4f882b2a
TG		 1041
1042 return 1;
1043}
1044
933c70a0 1045int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1046 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1047 int r;
1048
1049 assert(link);
1050 assert(link->manager);
1051 assert(link->manager->rtnl);
1052
40288ece
YW		 1053 if (mtu == 0 || link->setting_mtu)
1054 return 0;
1055
933c70a0 1056 if (link->mtu == mtu)
ee493106
YW		 1057 return 0;
1058
6a7a4e4d 1059 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1060
6a7a4e4d
LP		 1061 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1062 if (r < 0)
1063 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1064
44b598a1 1065 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1066 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1067 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1068
1069 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1070 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1071
72c2500b 1072 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1073 }
1074
1c4baffc 1075 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1076 if (r < 0)
1077 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1078
302a796f
YW		 1079 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1080 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1081 if (r < 0)
1082 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1083
ae941762 1084 link_ref(link);
1046bf9b 1085 link->setting_mtu = true;
b226d99b 1086
4f882b2a
TG		 1087 return 0;
1088}
1089
f6fcc1c2
YW		 1090static bool link_reduces_vlan_mtu(Link *link) {
1091 /* See netif_reduces_vlan_mtu() in kernel. */
1092 return streq_ptr(link->kind, "macsec");
1093}
1094
1095static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1096 uint32_t mtu = 0;
1097 NetDev *dev;
f6fcc1c2 1098
90e74a66 1099 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1100 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1101 /* See vlan_dev_change_mtu() in kernel. */
1102 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1103
1104 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1105 /* See macvlan_change_mtu() in kernel. */
1106 mtu = dev->mtu;
1107
1108 return mtu;
1109}
1110
1111static int link_configure_mtu(Link *link) {
1112 uint32_t mtu;
1113
1114 assert(link);
1115 assert(link->network);
1116
1117 if (link->network->mtu > 0)
1118 return link_set_mtu(link, link->network->mtu);
1119
1120 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1121 if (link->mtu >= mtu)
1122 return 0;
1123
1124 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1125 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1126 link->mtu, mtu);
1127
1128 return link_set_mtu(link, mtu);
1129}
1130
302a796f 1131static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1132 int r;
1133
1134 assert(m);
1135 assert(link);
1136 assert(link->ifname);
1137
1138 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1139 return 1;
1140
1141 r = sd_netlink_message_get_errno(m);
1142 if (r < 0)
5ecb131d 1143 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1144
1145 return 1;
1146}
1147
1148static int link_set_flags(Link *link) {
1149 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1150 unsigned ifi_change = 0;
1151 unsigned ifi_flags = 0;
1152 int r;
1153
1154 assert(link);
1155 assert(link->manager);
1156 assert(link->manager->rtnl);
1157
1158 if (link->flags & IFF_LOOPBACK)
1159 return 0;
1160
1161 if (!link->network)
1162 return 0;
1163
937e305e
SS		 1164 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 &&
1165 link->network->promiscuous < 0)
99d2baa2
SS		 1166 return 0;
1167
1168 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1169 if (r < 0)
1170 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1171
1172 if (link->network->arp >= 0) {
1173 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1174 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1175 }
1176
1177 if (link->network->multicast >= 0) {
1178 ifi_change |= IFF_MULTICAST;
1179 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1180 }
1181
866e6b7a
SS		 1182 if (link->network->allmulticast >= 0) {
1183 ifi_change |= IFF_ALLMULTI;
1184 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1185 }
1186
937e305e
SS		 1187 if (link->network->promiscuous >= 0) {
1188 ifi_change |= IFF_PROMISC;
1189 SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous);
1190 }
1191
99d2baa2
SS		 1192 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1193 if (r < 0)
1194 return log_link_error_errno(link, r, "Could not set link flags: %m");
1195
302a796f
YW		 1196 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1197 link_netlink_destroy_callback, link);
99d2baa2
SS		 1198 if (r < 0)
1199 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1200
1201 link_ref(link);
1202
1203 return 0;
1204}
1205
e7ab854c
TG		 1206static int link_acquire_ipv6_conf(Link *link) {
1207 int r;
1208
1209 assert(link);
1210
086b8853 1211 if (link->radv) {
7465dd22 1212 assert(link->radv);
94876904 1213 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 1214
1215 log_link_debug(link, "Starting IPv6 Router Advertisements");
1216
fd3ef936
YW		 1217 r = radv_emit_dns(link);
1218 if (r < 0)
1219 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1220
7465dd22
PF		 1221 r = sd_radv_start(link->radv);
1222 if (r < 0 && r != -EBUSY)
1223 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1224 }
1225
294f129b
YW		 1226 r = ndisc_start(link);
1227 if (r < 0)
1228 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 1229
294f129b
YW		 1230 r = dhcp6_start(link);
1231 if (r < 0)
1232 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 1233
1633c457
YW		 1234 r = dhcp6_request_prefix_delegation(link);
1235 if (r < 0)
1236 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1237
e7ab854c
TG		 1238 return 0;
1239}
1240
6fc25497 1241static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1242 int r;
1243
1244 assert(link);
ff254138
TG		 1245 assert(link->manager);
1246 assert(link->manager->event);
1247
0107b769 1248 if (link->dhcp_client) {
294f129b 1249 r = dhcp4_start(link);
0107b769 1250 if (r < 0)
294f129b 1251 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 1252
0b4b66cc 1253 } else if (link->ipv4ll) {
6a7a4e4d 1254 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1255
1256 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1257 if (r < 0)
1258 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1259 }
1260
6fc25497
SS		 1261 return 0;
1262}
1263
1264static int link_acquire_conf(Link *link) {
1265 int r;
1266
1267 assert(link);
1268
1269 r = link_acquire_ipv4_conf(link);
1270 if (r < 0)
1271 return r;
1272
94876904 1273 if (in6_addr_is_set(&link->ipv6ll_address)) {
6fc25497
SS		 1274 r = link_acquire_ipv6_conf(link);
1275 if (r < 0)
1276 return r;
1277 }
1278
2ffd6d73
YW		 1279 r = link_lldp_emit_start(link);
1280 if (r < 0)
1281 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 1282
ff254138
TG		 1283 return 0;
1284}
1285
a61bb41c 1286bool link_has_carrier(Link *link) {
deb2e523
TG		 1287 /* see Documentation/networking/operstates.txt in the kernel sources */
1288
a61bb41c 1289 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1290 return true;
1291
a61bb41c 1292 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1293 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1294 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1295 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1296 return true;
1297
1298 return false;
1299}
1300
0e2fdb83
SS		 1301static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1302 int r;
1303
1304 assert(link);
1305
9524014e
DS		 1306 link->setting_genmode = false;
1307
0e2fdb83
SS		 1308 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1309 return 1;
1310
1311 r = sd_netlink_message_get_errno(m);
1312 if (r < 0)
5ecb131d 1313 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1314 else
1315 log_link_debug(link, "Setting address genmode done.");
1316
1317 if (link->state == LINK_STATE_INITIALIZED) {
1318 r = link_configure_continue(link);
1319 if (r < 0)
1320 link_enter_failed(link);
1321 }
0e2fdb83
SS		 1322
1323 return 1;
1324}
1325
1326static int link_configure_addrgen_mode(Link *link) {
1327 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1328 uint8_t ipv6ll_mode;
1329 int r;
1330
1331 assert(link);
1332 assert(link->network);
1333 assert(link->manager);
1334 assert(link->manager->rtnl);
1335
9524014e 1336 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1337 return 0;
1338
0e2fdb83
SS		 1339 log_link_debug(link, "Setting address genmode for link");
1340
1341 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1342 if (r < 0)
1343 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1344
1345 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1346 if (r < 0)
1347 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1348
1349 r = sd_netlink_message_open_container(req, AF_INET6);
1350 if (r < 0)
1351 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1352
1353 if (!link_ipv6ll_enabled(link))
1354 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1355 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1356 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1357 if (r < 0) {
1358 /* The file may not exist. And even if it exists, when stable_secret is unset,
0e275271
YW		 1359 * reading the file fails with ENOMEM when read_full_virtual_file(), which uses
1360 * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */
1361 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m");
a6f1848a
SS		 1362
1363 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1364 } else
1365 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1366 } else
6f6296b9 1367 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1368
1369 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1370 if (r < 0)
1371 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1372
1373 r = sd_netlink_message_close_container(req);
1374 if (r < 0)
1375 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1376
1377 r = sd_netlink_message_close_container(req);
1378 if (r < 0)
1379 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1380
1381 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1382 link_netlink_destroy_callback, link);
1383 if (r < 0)
1384 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1385
1386 link_ref(link);
9524014e 1387 link->setting_genmode = true;
0e2fdb83
SS		 1388
1389 return 0;
1390}
1391
302a796f 1392static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1393 int r;
1394
1746cf2a
TG		 1395 assert(link);
1396
5da8149f 1397 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1398 return 1;
1399
1c4baffc 1400 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1401 if (r < 0)
26d6b214 1402 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1403 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1404
f882c247
TG		 1405 return 1;
1406}
1407
f282ce20 1408int link_up(Link *link) {
4afd3348 1409 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1410 int r;
1411
f882c247 1412 assert(link);
c106cc36 1413 assert(link->network);
f882c247
TG		 1414 assert(link->manager);
1415 assert(link->manager->rtnl);
1416
6a7a4e4d 1417 log_link_debug(link, "Bringing link up");
449f7554 1418
6a7a4e4d
LP		 1419 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1420 if (r < 0)
1421 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1422
5d4795f3 1423 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1426
302a796f
YW		 1427 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1428 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1429 if (r < 0)
1430 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1431
b226d99b
TG		 1432 link_ref(link);
1433
f882c247
TG		 1434 return 0;
1435}
1436
302a796f 1437static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1438 int r;
1439
1440 assert(link);
1441
1442 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1443 return 1;
1444
1c4baffc 1445 r = sd_netlink_message_get_errno(m);
0d4ad91d 1446 if (r < 0)
5ecb131d 1447 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1448
1449 return 1;
1450}
1451
8e54db83 1452int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1453 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1454 int r;
1455
1456 assert(link);
1457 assert(link->manager);
1458 assert(link->manager->rtnl);
1459
6a7a4e4d 1460 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1461
1462 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1463 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1464 if (r < 0)
1465 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1466
1467 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1468 if (r < 0)
1469 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1470
8e54db83
YW		 1471 r = netlink_call_async(link->manager->rtnl, NULL, req,
1472 callback ?: link_down_handler,
302a796f 1473 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1474 if (r < 0)
1475 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1476
1477 link_ref(link);
1478
1479 return 0;
1480}
1481
89fe6535
SS		 1482static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1483 int r;
1484
1485 assert(link);
1486
1487 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1488 return 1;
1489
1490 r = sd_netlink_message_get_errno(m);
1491 if (r < 0)
1492 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1493
1494 return 1;
1495}
1496
1497static int link_set_group(Link *link) {
1498 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1499 int r;
1500
1501 assert(link);
1502 assert(link->network);
1503 assert(link->manager);
1504 assert(link->manager->rtnl);
1505
1506 if (link->network->group <= 0)
1507 return 0;
1508
1509 log_link_debug(link, "Setting group");
1510
1511 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1512 if (r < 0)
1513 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1514
1515 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1516 if (r < 0)
1517 return log_link_error_errno(link, r, "Could not set link group: %m");
1518
1519 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1520 link_netlink_destroy_callback, link);
1521 if (r < 0)
1522 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1523
1524 link_ref(link);
1525
1526 return 0;
1527}
1528
0d4ad91d
AR		 1529static int link_handle_bound_to_list(Link *link) {
1530 Link *l;
0d4ad91d
AR		 1531 int r;
1532 bool required_up = false;
1533 bool link_is_up = false;
1534
1535 assert(link);
1536
1537 if (hashmap_isempty(link->bound_to_links))
1538 return 0;
1539
1540 if (link->flags & IFF_UP)
1541 link_is_up = true;
1542
90e74a66 1543 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1544 if (link_has_carrier(l)) {
1545 required_up = true;
1546 break;
1547 }
1548
1549 if (!required_up && link_is_up) {
8e54db83 1550 r = link_down(link, NULL);
0d4ad91d
AR		 1551 if (r < 0)
1552 return r;
1553 } else if (required_up && !link_is_up) {
1554 r = link_up(link);
1555 if (r < 0)
1556 return r;
1557 }
1558
1559 return 0;
1560}
1561
1562static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1563 Link *l;
1564 int r;
1565
1566 assert(link);
1567
1568 if (hashmap_isempty(link->bound_by_links))
1569 return 0;
1570
90e74a66 1571 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1572 r = link_handle_bound_to_list(l);
1573 if (r < 0)
1574 return r;
1575 }
1576
1577 return 0;
1578}
1579
1580static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1581 int r;
1582
1583 assert(link);
1584 assert(carrier);
1585
1586 if (link == carrier)
1587 return 0;
1588
1589 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1590 return 0;
1591
190b3b5c 1592 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 1593 if (r < 0)
1594 return r;
1595
9092113d
YW		 1596 link_dirty(link);
1597
0d4ad91d
AR		 1598 return 0;
1599}
1600
1601static int link_new_bound_by_list(Link *link) {
1602 Manager *m;
1603 Link *carrier;
0d4ad91d 1604 int r;
0d4ad91d
AR		 1605
1606 assert(link);
1607 assert(link->manager);
1608
1609 m = link->manager;
1610
90e74a66 1611 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 1612 if (!carrier->network)
1613 continue;
1614
1615 if (strv_isempty(carrier->network->bind_carrier))
1616 continue;
1617
191a3f16 1618 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 1619 r = link_put_carrier(link, carrier, &link->bound_by_links);
1620 if (r < 0)
1621 return r;
0d4ad91d
AR		 1622 }
1623 }
1624
90e74a66 1625 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 1626 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
1627 if (r < 0)
1628 return r;
0d4ad91d
AR		 1629 }
1630
1631 return 0;
1632}
1633
1634static int link_new_bound_to_list(Link *link) {
1635 Manager *m;
1636 Link *carrier;
0d4ad91d 1637 int r;
0d4ad91d
AR		 1638
1639 assert(link);
1640 assert(link->manager);
1641
1642 if (!link->network)
1643 return 0;
1644
1645 if (strv_isempty(link->network->bind_carrier))
1646 return 0;
1647
1648 m = link->manager;
1649
90e74a66 1650 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 1651 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 1652 r = link_put_carrier(link, carrier, &link->bound_to_links);
1653 if (r < 0)
1654 return r;
0d4ad91d
AR		 1655 }
1656 }
1657
90e74a66 1658 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 1659 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
1660 if (r < 0)
1661 return r;
0d4ad91d
AR		 1662 }
1663
1664 return 0;
1665}
1666
1667static int link_new_carrier_maps(Link *link) {
1668 int r;
1669
1670 r = link_new_bound_by_list(link);
1671 if (r < 0)
1672 return r;
1673
1674 r = link_handle_bound_by_list(link);
1675 if (r < 0)
1676 return r;
1677
1678 r = link_new_bound_to_list(link);
1679 if (r < 0)
1680 return r;
1681
1682 r = link_handle_bound_to_list(link);
1683 if (r < 0)
1684 return r;
1685
1686 return 0;
1687}
1688
1689static void link_free_bound_to_list(Link *link) {
9092113d 1690 bool updated = false;
0d4ad91d 1691 Link *bound_to;
0d4ad91d 1692
9092113d
YW		 1693 assert(link);
1694
1695 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
1696 updated = true;
0d4ad91d
AR		 1697
1698 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 1699 link_dirty(bound_to);
0d4ad91d
AR		 1700 }
1701
9092113d
YW		 1702 if (updated)
1703 link_dirty(link);
1704
0d4ad91d
AR		 1705 return;
1706}
1707
1708static void link_free_bound_by_list(Link *link) {
9092113d 1709 bool updated = false;
0d4ad91d 1710 Link *bound_by;
0d4ad91d 1711
9092113d
YW		 1712 assert(link);
1713
1714 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
1715 updated = true;
0d4ad91d
AR		 1716
1717 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 1718 link_dirty(bound_by);
0d4ad91d
AR		 1719 link_handle_bound_to_list(bound_by);
1720 }
1721 }
1722
9092113d
YW		 1723 if (updated)
1724 link_dirty(link);
1725
0d4ad91d
AR		 1726 return;
1727}
1728
1729static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 1730 assert(link);
1731
9092113d
YW		 1732 link_free_bound_to_list(link);
1733 link_free_bound_by_list(link);
0d4ad91d
AR		 1734
1735 return;
1736}
1737
5f707e12
YW		 1738static int link_append_to_master(Link *link, NetDev *netdev) {
1739 Link *master;
1740 int r;
1741
1742 assert(link);
1743 assert(netdev);
1744
1745 r = link_get(link->manager, netdev->ifindex, &master);
1746 if (r < 0)
1747 return r;
1748
de7fef4b 1749 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 1750 if (r <= 0)
5f707e12
YW		 1751 return r;
1752
1753 link_ref(link);
1754 return 0;
1755}
1756
1757static void link_drop_from_master(Link *link, NetDev *netdev) {
1758 Link *master;
1759
1760 assert(link);
1761
1762 if (!link->manager || !netdev)
1763 return;
1764
1765 if (link_get(link->manager, netdev->ifindex, &master) < 0)
1766 return;
1767
1768 link_unref(set_remove(master->slaves, link));
1769}
1770
1771static void link_detach_from_manager(Link *link) {
1772 if (!link || !link->manager)
1773 return;
1774
1775 link_unref(set_remove(link->manager->links_requesting_uuid, link));
1776 link_clean(link);
1777
1778 /* The following must be called at last. */
1779 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
1780 link_unref(link);
1781}
1782
3be9d62a 1783static void link_drop(Link *link) {
0d4ad91d
AR		 1784 if (!link || link->state == LINK_STATE_LINGER)
1785 return;
1786
1787 link_set_state(link, LINK_STATE_LINGER);
1788
1789 link_free_carrier_maps(link);
1790
5f707e12 1791 if (link->network) {
c0267a59 1792 link_drop_from_master(link, link->network->batadv);
5f707e12
YW		 1793 link_drop_from_master(link, link->network->bridge);
1794 link_drop_from_master(link, link->network->bond);
1795 }
1796
6a7a4e4d 1797 log_link_debug(link, "Link removed");
0d4ad91d 1798
db2f8a2e 1799 (void) unlink(link->state_file);
c4397d94 1800 link_detach_from_manager(link);
0d4ad91d
AR		 1801}
1802
04952b25 1803int link_activate(Link *link) {
f882c247
TG		 1804 int r;
1805
ef1ba606 1806 assert(link);
f5be5601 1807 assert(link->network);
dd3efc09 1808
61135582
DS		 1809 switch (link->network->activation_policy) {
1810 case ACTIVATION_POLICY_BOUND:
0d4ad91d
AR		 1811 r = link_handle_bound_to_list(link);
1812 if (r < 0)
1813 return r;
61135582
DS		 1814 break;
1815 case ACTIVATION_POLICY_UP:
1816 if (link->activated)
1817 break;
1818 _fallthrough_;
1819 case ACTIVATION_POLICY_ALWAYS_UP:
505f8da7 1820 r = link_up(link);
04952b25 1821 if (r < 0)
505f8da7 1822 return r;
61135582
DS		 1823 break;
1824 case ACTIVATION_POLICY_DOWN:
1825 if (link->activated)
1826 break;
1827 _fallthrough_;
1828 case ACTIVATION_POLICY_ALWAYS_DOWN:
1829 r = link_down(link, NULL);
04952b25 1830 if (r < 0)
61135582 1831 return r;
61135582
DS		 1832 break;
1833 default:
1834 break;
ef1ba606 1835 }
61135582 1836 link->activated = true;
f882c247 1837
04952b25
YW		 1838 return 0;
1839}
1840
1841static int link_joined(Link *link) {
1842 int r;
1843
1844 assert(link);
1845 assert(link->network);
1846
1847 r = link_activate(link);
1848 if (r < 0)
1849 return r;
1850
9ed794a3 1851 if (link->network->bridge) {
e1853b00 1852 r = link_set_bridge(link);
6a7a4e4d
LP		 1853 if (r < 0)
1854 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 1855
1856 r = link_append_to_master(link, link->network->bridge);
1857 if (r < 0)
1858 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 1859 }
1860
eb64b435 1861 if (link->network->bond) {
7fcee284 1862 r = link_set_bond(link);
eb64b435
SS		 1863 if (r < 0)
1864 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 1865
45e11abf 1866 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 1867 if (r < 0)
1868 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 1869 }
1870
34d7f2c9
YW		 1871 r = link_set_bridge_vlan(link);
1872 if (r < 0)
1873 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
13b498f9 1874
c1835a42
RM		 1875 /* Skip setting up addresses until it gets carrier,
1876 or it would try to set addresses twice,
1877 which is bad for non-idempotent steps. */
dad2d78e 1878 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 1879 return 0;
1880
b425c3ae 1881 link_set_state(link, LINK_STATE_CONFIGURING);
0e569a43
YW		 1882
1883 r = link_acquire_conf(link);
1884 if (r < 0)
1885 return r;
1886
682c65b0 1887 return link_set_static_configs(link);
02b59d57
TG		 1888}
1889
302a796f 1890static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 1891 int r;
1892
1746cf2a 1893 assert(link);
ef1ba606 1894 assert(link->network);
34bf3c00 1895 assert(link->enslaving > 0);
02b59d57 1896
313cefa1 1897 link->enslaving--;
52433f6b 1898
5da8149f 1899 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 1900 return 1;
1901
1c4baffc 1902 r = sd_netlink_message_get_errno(m);
856f962c 1903 if (r < 0 && r != -EEXIST) {
5ecb131d 1904 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 1905 link_enter_failed(link);
1906 return 1;
4ff296b0
YW		 1907 }
1908
1909 log_link_debug(link, "Joined netdev");
02b59d57 1910
34bf3c00 1911 if (link->enslaving == 0) {
4ff296b0
YW		 1912 r = link_joined(link);
1913 if (r < 0)
1914 link_enter_failed(link);
34bf3c00 1915 }
02b59d57
TG		 1916
1917 return 1;
1918}
1919
3f265037 1920static int link_enter_join_netdev(Link *link) {
6a0a2f86 1921 NetDev *netdev;
02b59d57
TG		 1922 int r;
1923
1924 assert(link);
1925 assert(link->network);
bd08ce56 1926 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 1927
289e6774 1928 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 1929
34bf3c00 1930 link->enslaving = 0;
02b59d57 1931
d9c67ea1 1932 if (link->network->bond) {
cbff7170
TJ		 1933 if (link->network->bond->state == NETDEV_STATE_READY &&
1934 link->network->bond->ifindex == link->master_ifindex)
1935 return link_joined(link);
1936
f2341e0a
LP		 1937 log_struct(LOG_DEBUG,
1938 LOG_LINK_INTERFACE(link),
1939 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1940 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 1941
34bf3c00
YW		 1942 link->enslaving++;
1943
f2341e0a 1944 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 1945 if (r < 0) {
f2341e0a
LP		 1946 log_struct_errno(LOG_WARNING, r,
1947 LOG_LINK_INTERFACE(link),
1948 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 1949 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 1950 link_enter_failed(link);
1951 return r;
c0267a59
AW		 1952 }
1953 }
1954
1955 if (link->network->batadv) {
1956 log_struct(LOG_DEBUG,
1957 LOG_LINK_INTERFACE(link),
1958 LOG_NETDEV_INTERFACE(link->network->batadv),
1959 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname));
1960
1961 link->enslaving++;
1962
1963 r = netdev_join(link->network->batadv, link, netdev_join_handler);
1964 if (r < 0) {
1965 log_struct_errno(LOG_WARNING, r,
1966 LOG_LINK_INTERFACE(link),
1967 LOG_NETDEV_INTERFACE(link->network->batadv),
1968 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname));
1969 link_enter_failed(link);
1970 return r;
52433f6b 1971 }
0ad6148e
MO		 1972 }
1973
d9c67ea1 1974 if (link->network->bridge) {
f2341e0a
LP		 1975 log_struct(LOG_DEBUG,
1976 LOG_LINK_INTERFACE(link),
1977 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1978 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 1979
34bf3c00
YW		 1980 link->enslaving++;
1981
f2341e0a 1982 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 1983 if (r < 0) {
f2341e0a
LP		 1984 log_struct_errno(LOG_WARNING, r,
1985 LOG_LINK_INTERFACE(link),
1986 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 1987 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 1988 link_enter_failed(link);
1989 return r;
1990 }
52433f6b
TG		 1991 }
1992
6cb955c6
AR		 1993 if (link->network->vrf) {
1994 log_struct(LOG_DEBUG,
1995 LOG_LINK_INTERFACE(link),
1996 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 1997 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
1998
34bf3c00
YW		 1999 link->enslaving++;
2000
6cb955c6
AR		 2001 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2002 if (r < 0) {
2003 log_struct_errno(LOG_WARNING, r,
2004 LOG_LINK_INTERFACE(link),
2005 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2006 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2007 link_enter_failed(link);
2008 return r;
2009 }
6cb955c6
AR		 2010 }
2011
90e74a66 2012 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2013
2b6db913
YW		 2014 if (netdev->ifindex > 0)
2015 /* Assume already enslaved. */
a63e5daa 2016 continue;
a63e5daa 2017
7033af49
YW		 2018 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2019 continue;
2020
f2341e0a
LP		 2021 log_struct(LOG_DEBUG,
2022 LOG_LINK_INTERFACE(link),
2023 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2024 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2025
34bf3c00
YW		 2026 link->enslaving++;
2027
f2341e0a 2028 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2029 if (r < 0) {
f2341e0a
LP		 2030 log_struct_errno(LOG_WARNING, r,
2031 LOG_LINK_INTERFACE(link),
2032 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2033 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2034 link_enter_failed(link);
2035 return r;
2036 }
326cb406
SS		 2037 }
2038
34bf3c00
YW		 2039 if (link->enslaving == 0)
2040 return link_joined(link);
2041
ef1ba606
TG		 2042 return 0;
2043}
2044
5e5b137a 2045static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 2046 int k, r;
2047
2048 assert(link);
2049 assert(link->manager);
5e5b137a 2050
e36d601c 2051 r = link_drop_foreign_routes(link);
5e5b137a 2052
e36d601c 2053 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 2054 if (k < 0 && r >= 0)
2055 r = k;
2056
e36d601c 2057 k = link_drop_foreign_addresses(link);
0b81225e
YW		 2058 if (k < 0 && r >= 0)
2059 r = k;
d1bdafd2 2060
e36d601c 2061 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 2062 if (k < 0 && r >= 0)
2063 r = k;
2064
0b81225e
YW		 2065 k = manager_drop_foreign_routing_policy_rules(link->manager);
2066 if (k < 0 && r >= 0)
2067 r = k;
2068
2069 return r;
5e5b137a
TG		 2070}
2071
3104883d 2072static int link_drop_config(Link *link) {
0b81225e
YW		 2073 int k, r;
2074
2075 assert(link);
2076 assert(link->manager);
3104883d 2077
e36d601c 2078 r = link_drop_routes(link);
3104883d 2079
e36d601c 2080 k = link_drop_nexthops(link);
0b81225e
YW		 2081 if (k < 0 && r >= 0)
2082 r = k;
d1bdafd2 2083
e36d601c 2084 k = link_drop_addresses(link);
0b81225e
YW		 2085 if (k < 0 && r >= 0)
2086 r = k;
2087
e36d601c 2088 k = link_drop_neighbors(link);
25b82b6e
YW		 2089 if (k < 0 && r >= 0)
2090 r = k;
2091
0b81225e
YW		 2092 k = manager_drop_routing_policy_rules(link->manager, link);
2093 if (k < 0 && r >= 0)
2094 r = k;
3104883d 2095
c69305ff
LP		 2096 ndisc_flush(link);
2097
0b81225e 2098 return r;
3104883d
SS		 2099}
2100
19d9a5ad
YW		 2101static void link_drop_requests(Link *link) {
2102 Request *req;
2103
2104 assert(link);
2105 assert(link->manager);
2106
2107 ORDERED_SET_FOREACH(req, link->manager->request_queue)
2108 if (req->link == link)
2109 request_drop(req);
2110}
2111
256c75fd 2112int link_configure(Link *link) {
4ecdcb07
YW		 2113 int r;
2114
ef1ba606 2115 assert(link);
b22d8a00 2116 assert(link->network);
bd08ce56 2117 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2118
34658df2 2119 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2120 if (r < 0)
2121 return r;
2122
518cd6b5
SS		 2123 r = link_configure_sr_iov(link);
2124 if (r < 0)
2125 return r;
2126
500b96eb 2127 if (link->iftype == ARPHRD_CAN)
600b7898 2128 /* let's shortcut things for CAN which doesn't need most of what's done below. */
93ea7750 2129 return link_configure_can(link);
92c918b0 2130
5e0534f1 2131 r = link_set_sysctl(link);
b69c3180
SS		 2132 if (r < 0)
2133 return r;
8749cbcd 2134
e16e4b3b
DS		 2135 r = link_set_mac(link);
2136 if (r < 0)
2137 return r;
2138
2139 r = link_set_nomaster(link);
2140 if (r < 0)
2141 return r;
2142
99d2baa2
SS		 2143 r = link_set_flags(link);
2144 if (r < 0)
2145 return r;
2146
89fe6535
SS		 2147 r = link_set_group(link);
2148 if (r < 0)
2149 return r;
2150
2ffd6d73
YW		 2151 r = ipv4ll_configure(link);
2152 if (r < 0)
2153 return r;
64b21ece 2154
2ffd6d73
YW		 2155 r = dhcp4_configure(link);
2156 if (r < 0)
2157 return r;
eb34d4af 2158
2ffd6d73
YW		 2159 r = dhcp6_configure(link);
2160 if (r < 0)
2161 return r;
f5a8c43f 2162
2ffd6d73
YW		 2163 r = ndisc_configure(link);
2164 if (r < 0)
2165 return r;
4138fb2c 2166
086b8853
YW		 2167 r = radv_configure(link);
2168 if (r < 0)
2169 return r;
7465dd22 2170
2ffd6d73
YW		 2171 r = link_lldp_rx_configure(link);
2172 if (r < 0)
2173 return r;
ce43e484 2174
f6fcc1c2 2175 r = link_configure_mtu(link);
40288ece
YW		 2176 if (r < 0)
2177 return r;
44b598a1 2178
9f6e82e6
YW		 2179 r = link_configure_addrgen_mode(link);
2180 if (r < 0)
2181 return r;
0e2fdb83 2182
3a390124
DS		 2183 return link_configure_continue(link);
2184}
2185
2186/* The configuration continues in this separate function, instead of
2187 * including this in the above link_configure() function, for two
2188 * reasons:
2189 * 1) some devices reset the link when the mtu is set, which caused
2190 * an infinite loop here in networkd; see:
2191 * https://github.com/systemd/systemd/issues/6593
2192 * https://github.com/systemd/systemd/issues/9831
2193 * 2) if ipv6ll is disabled, then bringing the interface up must be
2194 * delayed until after we get confirmation from the kernel that
2195 * the addr_gen_mode parameter has been set (via netlink), see:
2196 * https://github.com/systemd/systemd/issues/13882
2197 */
2198static int link_configure_continue(Link *link) {
55dc8c4a
YW		 2199 int r;
2200
2201 assert(link);
2202 assert(link->network);
bd08ce56 2203 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 2204
9524014e 2205 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 2206 return 0;
2207
4c649652
DS		 2208 /* Drop foreign config, but ignore loopback or critical devices.
2209 * We do not want to remove loopback address or addresses used for root NFS. */
2210 if (!(link->flags & IFF_LOOPBACK) &&
2211 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
2212 r = link_drop_foreign_config(link);
2213 if (r < 0)
2214 return r;
2215 }
2216
d236718c
DS		 2217 /* The kernel resets ipv6 mtu after changing device mtu;
2218 * we must set this here, after we've set device mtu */
2219 r = link_set_ipv6_mtu(link);
2220 if (r < 0)
5e0534f1 2221 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m");
d236718c 2222
3f265037 2223 return link_enter_join_netdev(link);
505f8da7
TG		 2224}
2225
572b21d9 2226static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
8bceafa7 2227 _cleanup_strv_free_ char **s = NULL;
ad932b15
YW		 2228 Network *network;
2229 int r;
2230
8bceafa7 2231 assert(m);
572b21d9 2232
8bceafa7
YW		 2233 r = sd_netlink_message_get_errno(m);
2234 if (r < 0)
2235 return r;
572b21d9 2236
8bceafa7
YW		 2237 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2238 if (r < 0 && r != -ENODATA)
2239 return r;
572b21d9 2240
8bceafa7 2241 strv_free_and_replace(link->alternative_names, s);
572b21d9 2242
c643bda5
YW		 2243 r = network_get(link->manager, link->iftype, link->sd_device,
2244 link->ifname, link->alternative_names, link->driver,
b8162cd2 2245 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2246 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 2247 if (r == -ENOENT) {
2248 link_enter_unmanaged(link);
2249 return 0;
2250 } else if (r == 0 && network->unmanaged) {
2251 link_enter_unmanaged(link);
2252 return 0;
2253 } else if (r < 0)
2254 return r;
2255
99b8517c 2256 if (link->network == network && !force)
ad932b15
YW		 2257 return 0;
2258
2259 log_link_info(link, "Re-configuring with %s", network->filename);
2260
2261 /* Dropping old .network file */
2a99eed0 2262 r = link_stop_engines(link, false);
572b21d9 2263 if (r < 0)
ad932b15 2264 return r;
ad932b15 2265
19d9a5ad
YW		 2266 link_drop_requests(link);
2267
ad932b15
YW		 2268 r = link_drop_config(link);
2269 if (r < 0)
2270 return r;
2271
2c7b826d 2272 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2273 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 2274 r = link_drop_foreign_config(link);
2275 if (r < 0)
2276 return r;
2277 }
2278
2279 link_free_carrier_maps(link);
2280 link_free_engines(link);
2281 link->network = network_unref(link->network);
59c31eba 2282 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 2283
2284 /* Then, apply new .network file */
9092113d
YW		 2285 link->network = network_ref(network);
2286 link_dirty(link);
ad932b15
YW		 2287
2288 r = link_new_carrier_maps(link);
2289 if (r < 0)
2290 return r;
2291
2292 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 2293 link->activated = false;
ad932b15 2294
ad932b15
YW		 2295 r = link_configure(link);
2296 if (r < 0)
2297 return r;
2298
2299 return 0;
2300}
2301
572b21d9
YW		 2302static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2303 int r;
2304
2305 r = link_reconfigure_internal(link, m, false);
2306 if (r < 0)
2307 link_enter_failed(link);
2308
2309 return 1;
2310}
2311
2312static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2313 int r;
2314
2315 r = link_reconfigure_internal(link, m, true);
2316 if (r < 0)
2317 link_enter_failed(link);
2318
2319 return 1;
2320}
2321
2322int link_reconfigure(Link *link, bool force) {
2323 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2324 int r;
2325
8bceafa7 2326 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 2327 * the function from being called multiple times simultaneously, refuse to reconfigure the
2328 * interface in these cases. */
8bceafa7 2329 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 2330 return 0; /* 0 means no-op. */
2c0d7ed3 2331
572b21d9
YW		 2332 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2333 link->ifindex);
2334 if (r < 0)
2335 return r;
2336
2337 r = netlink_call_async(link->manager->rtnl, NULL, req,
2338 force ? link_force_reconfigure_handler : link_reconfigure_handler,
2339 link_netlink_destroy_callback, link);
2340 if (r < 0)
2341 return r;
2342
2343 link_ref(link);
2344
8bceafa7 2345 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 2346}
2347
e6bf7774 2348static int link_initialized_and_synced(Link *link) {
505f8da7 2349 Network *network;
505f8da7
TG		 2350 int r;
2351
2352 assert(link);
2353 assert(link->ifname);
2354 assert(link->manager);
2355
bd08ce56
YW		 2356 /* We may get called either from the asynchronous netlink callback,
2357 * or directly for link_add() if running in a container. See link_add(). */
2358 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 2359 return 0;
505f8da7 2360
6a7a4e4d 2361 log_link_debug(link, "Link state is up-to-date");
bd08ce56 2362 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 2363
0d4ad91d
AR		 2364 r = link_new_bound_by_list(link);
2365 if (r < 0)
2366 return r;
2367
2368 r = link_handle_bound_by_list(link);
2369 if (r < 0)
2370 return r;
2371
c4a03a56 2372 if (!link->network) {
0894cfe4 2373 r = wifi_get_info(link);
8d968fdd
YW		 2374 if (r < 0)
2375 return r;
2376
c643bda5
YW		 2377 r = network_get(link->manager, link->iftype, link->sd_device,
2378 link->ifname, link->alternative_names, link->driver,
b8162cd2 2379 &link->hw_addr.addr.ether, &link->permanent_mac,
c643bda5 2380 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 2381 if (r == -ENOENT) {
2382 link_enter_unmanaged(link);
4232cf04 2383 return 0;
a09dc546
DM		 2384 } else if (r == 0 && network->unmanaged) {
2385 link_enter_unmanaged(link);
2386 return 0;
c4a03a56
TG		 2387 } else if (r < 0)
2388 return r;
505f8da7 2389
c4a03a56
TG		 2390 if (link->flags & IFF_LOOPBACK) {
2391 if (network->link_local != ADDRESS_FAMILY_NO)
2392 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 2393
c4a03a56
TG		 2394 if (network->dhcp != ADDRESS_FAMILY_NO)
2395 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 2396
c4a03a56
TG		 2397 if (network->dhcp_server)
2398 log_link_debug(link, "Ignoring DHCP server for loopback link");
2399 }
bd2efe92 2400
9092113d
YW		 2401 link->network = network_ref(network);
2402 link_dirty(link);
c4a03a56 2403 }
505f8da7 2404
0d4ad91d
AR		 2405 r = link_new_bound_to_list(link);
2406 if (r < 0)
2407 return r;
2408
a748b692
TG		 2409 r = link_configure(link);
2410 if (r < 0)
2411 return r;
2412
4232cf04 2413 return 0;
505f8da7
TG		 2414}
2415
302a796f 2416static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 2417 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 2418 int r;
2419
572b21d9
YW		 2420 r = sd_netlink_message_get_errno(m);
2421 if (r < 0) {
40681e5c 2422 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 2423 link_enter_failed(link);
2424 return 0;
2425 }
2426
2427 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2428 if (r < 0 && r != -ENODATA) {
2429 link_enter_failed(link);
2430 return 0;
2431 }
2432
2433 strv_free_and_replace(link->alternative_names, s);
2434
4ff296b0
YW		 2435 r = link_initialized_and_synced(link);
2436 if (r < 0)
2437 link_enter_failed(link);
e6bf7774
YW		 2438 return 1;
2439}
2440
3be9d62a 2441static int link_initialized(Link *link, sd_device *device) {
4afd3348 2442 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 2443 int r;
2444
2445 assert(link);
2446 assert(link->manager);
2447 assert(link->manager->rtnl);
2448 assert(device);
2449
8434fd5c 2450 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 2451 return 0;
2452
51517f9e 2453 if (link->sd_device)
679b3605
TG		 2454 return 0;
2455
79008bdd 2456 log_link_debug(link, "udev initialized link");
bd08ce56 2457 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 2458
51517f9e 2459 link->sd_device = sd_device_ref(device);
4f561e8e 2460
3c9b8860
TG		 2461 /* udev has initialized the link, but we don't know if we have yet
2462 * processed the NEWLINK messages with the latest state. Do a GETLINK,
2463 * when it returns we know that the pending NEWLINKs have already been
2464 * processed and that we are up-to-date */
4f561e8e 2465
3c9b8860
TG		 2466 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
2467 link->ifindex);
4f561e8e
TG		 2468 if (r < 0)
2469 return r;
2470
302a796f
YW		 2471 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
2472 link_netlink_destroy_callback, link);
4f561e8e
TG		 2473 if (r < 0)
2474 return r;
2475
5da8149f
TG		 2476 link_ref(link);
2477
4f561e8e
TG		 2478 return 0;
2479}
2480
3be9d62a 2481static int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 2482 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 2483 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 2484 Link *link;
5a937ea2 2485 int r;
505f8da7
TG		 2486
2487 assert(m);
fbbeb65a 2488 assert(m->rtnl);
505f8da7
TG		 2489 assert(message);
2490 assert(ret);
2491
2492 r = link_new(m, message, ret);
2493 if (r < 0)
2494 return r;
2495
2496 link = *ret;
2497
6a7a4e4d 2498 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 2499
bf331d87
YW		 2500 if (path_is_read_only_fs("/sys") <= 0) {
2501 /* udev should be around */
ae06ab10 2502 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 2503 r = sd_device_new_from_device_id(&device, ifindex_str);
2504 if (r < 0) {
83e7c37b 2505 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
4d59e14f 2506 return 0;
5c416fc4 2507 }
505f8da7 2508
5a937ea2 2509 r = sd_device_get_is_initialized(device);
51517f9e 2510 if (r < 0) {
bf331d87 2511 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 2512 goto failed;
2513 }
5a937ea2 2514 if (r == 0) {
505f8da7 2515 /* not yet ready */
79008bdd 2516 log_link_debug(link, "link pending udev initialization...");
505f8da7 2517 return 0;
3c4cb064 2518 }
505f8da7 2519
299ad32d
YW		 2520 r = device_is_renaming(device);
2521 if (r < 0) {
bf331d87 2522 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 2523 goto failed;
2524 }
2525 if (r > 0) {
bf331d87 2526 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 2527 return 0;
2528 }
2529
4f561e8e
TG		 2530 r = link_initialized(link, device);
2531 if (r < 0)
5c416fc4 2532 goto failed;
4f561e8e 2533 } else {
e6bf7774 2534 r = link_initialized_and_synced(link);
4f561e8e 2535 if (r < 0)
5c416fc4 2536 goto failed;
4f561e8e 2537 }
505f8da7 2538
a748b692 2539 return 0;
5c416fc4
TG		 2540failed:
2541 link_enter_failed(link);
2542 return r;
a748b692
TG		 2543}
2544
c601ebf7 2545int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 2546 int r;
2547
2548 assert(link);
2549
2550 log_link_info(link, "Gained IPv6LL");
2551
c601ebf7 2552 link->ipv6ll_address = *address;
e7ab854c
TG		 2553 link_check_ready(link);
2554
b9ea3d2e 2555 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 2556 r = link_acquire_ipv6_conf(link);
2557 if (r < 0) {
2558 link_enter_failed(link);
2559 return r;
2560 }
2561 }
2562
2563 return 0;
2564}
2565
3be9d62a
YW		 2566int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
2567 sd_device_action_t action;
2568 Manager *m = userdata;
2569 Link *link = NULL;
2570 int r, ifindex;
2571
2572 assert(m);
2573 assert(device);
2574
2575 r = sd_device_get_action(device, &action);
2576 if (r < 0) {
2577 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
2578 return 0;
2579 }
2580
2581 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
2582 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
2583 * still exists — and we are interested in that. */
2584 if (action == SD_DEVICE_REMOVE)
2585 return 0;
2586
2587 r = sd_device_get_ifindex(device, &ifindex);
2588 if (r < 0) {
2589 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
2590 device_action_to_string(action));
2591 return 0;
2592 }
2593
2594 r = device_is_renaming(device);
2595 if (r < 0) {
2596 log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
2597 device_action_to_string(action));
2598 return 0;
2599 }
2600 if (r > 0) {
2601 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
2602 return 0;
2603 }
2604
2605 r = link_get(m, ifindex, &link);
2606 if (r < 0) {
2607 if (r != -ENODEV)
2608 log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
2609 return 0;
2610 }
2611
2612 (void) link_initialized(link, device);
2613
2614 return 0;
2615}
2616
9c0a72f9
TG		 2617static int link_carrier_gained(Link *link) {
2618 int r;
2619
2620 assert(link);
2621
600b7898
YW		 2622 if (link->iftype == ARPHRD_CAN)
2623 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2624 return link_handle_bound_by_list(link);
2625
0894cfe4 2626 r = wifi_get_info(link);
8d968fdd
YW		 2627 if (r < 0)
2628 return r;
2629 if (r > 0) {
8bceafa7 2630 r = link_reconfigure(link, false);
572b21d9
YW		 2631 if (r < 0) {
2632 link_enter_failed(link);
8d968fdd 2633 return r;
572b21d9 2634 }
8d968fdd
YW		 2635 }
2636
b9ea3d2e 2637 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 2638 r = link_acquire_conf(link);
2639 if (r < 0) {
2640 link_enter_failed(link);
2641 return r;
2642 }
6fc25497 2643
b425c3ae 2644 link_set_state(link, LINK_STATE_CONFIGURING);
682c65b0 2645 r = link_set_static_configs(link);
6fc25497
SS		 2646 if (r < 0)
2647 return r;
9c0a72f9
TG		 2648 }
2649
0d4ad91d
AR		 2650 r = link_handle_bound_by_list(link);
2651 if (r < 0)
2652 return r;
2653
1f241589
YW		 2654 if (!link->bridge_mdb_configured) {
2655 r = link_set_bridge_mdb(link);
2656 if (r < 0)
2657 return r;
2658 }
2659
2660 if (streq_ptr(link->kind, "bridge")) {
2661 Link *slave;
2662
2663 SET_FOREACH(slave, link->slaves) {
2664 if (slave->bridge_mdb_configured)
2665 continue;
2666
2667 r = link_set_bridge_mdb(slave);
2668 if (r < 0)
2669 link_enter_failed(slave);
2670 }
2671 }
3db468ea 2672
9c0a72f9
TG		 2673 return 0;
2674}
2675
2676static int link_carrier_lost(Link *link) {
2677 int r;
2678
2679 assert(link);
2680
25e992ba 2681 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 2682 return 0;
2683
600b7898
YW		 2684 if (link->iftype == ARPHRD_CAN)
2685 /* let's shortcut things for CAN which doesn't need most of what's done below. */
2686 return link_handle_bound_by_list(link);
2687
fbdb6605 2688 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 2689 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
2690 * configuration and stop the clients as well. */
97e7fb39
SS		 2691 if (link->setting_mtu)
2692 return 0;
2693
2a99eed0 2694 r = link_stop_engines(link, false);
9c0a72f9
TG		 2695 if (r < 0) {
2696 link_enter_failed(link);
2697 return r;
2698 }
2699
19d9a5ad
YW		 2700 link_drop_requests(link);
2701
3104883d
SS		 2702 r = link_drop_config(link);
2703 if (r < 0)
2704 return r;
2705
2c7b826d 2706 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 2707 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 2708 r = link_drop_foreign_config(link);
2709 if (r < 0)
2710 return r;
2711 }
3104883d 2712
0d4ad91d
AR		 2713 r = link_handle_bound_by_list(link);
2714 if (r < 0)
2715 return r;
2716
9c0a72f9
TG		 2717 return 0;
2718}
2719
2720int link_carrier_reset(Link *link) {
2721 int r;
2722
2723 assert(link);
2724
2725 if (link_has_carrier(link)) {
2726 r = link_carrier_lost(link);
2727 if (r < 0)
2728 return r;
2729
2730 r = link_carrier_gained(link);
2731 if (r < 0)
2732 return r;
2733
6a7a4e4d 2734 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 2735 }
2736
2737 return 0;
2738}
2739
d236718c
DS		 2740static int link_admin_state_up(Link *link) {
2741 int r;
2742
61135582
DS		 2743 assert(link);
2744
3be9d62a
YW		 2745 /* This is called every time an interface admin state changes to up;
2746 * specifically, when IFF_UP flag changes from unset to set. */
2747
61135582
DS		 2748 if (!link->network)
2749 return 0;
2750
2751 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
2752 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down");
2753 return link_down(link, NULL);
2754 }
2755
d236718c
DS		 2756 /* We set the ipv6 mtu after the device mtu, but the kernel resets
2757 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
2758 * ipv6_mtu_set prevents this from trying to set it too early before
2759 * the link->network has been setup; we only need to reset it
2760 * here if we've already set it during normal initialization. */
2761 if (link->ipv6_mtu_set) {
2762 r = link_set_ipv6_mtu(link);
2763 if (r < 0)
2764 return r;
2765 }
2766
2767 return 0;
2768}
2769
61135582 2770static int link_admin_state_down(Link *link) {
61135582
DS		 2771 assert(link);
2772
2773 if (!link->network)
2774 return 0;
2775
2776 if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
36161cba
YW		 2777 if (streq_ptr(link->kind, "can") && !link->can_configured)
2778 /* CAN device needs to be down on configure. */
2779 return 0;
2780
61135582
DS		 2781 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up");
2782 return link_up(link);
2783 }
2784
2785 return 0;
2786}
2787
3be9d62a 2788static int link_update(Link *link, sd_netlink_message *m) {
572b21d9 2789 _cleanup_strv_free_ char **s = NULL;
b8162cd2 2790 hw_addr_data hw_addr;
ca4e095a 2791 const char *ifname;
afe7fd56 2792 uint32_t mtu;
d236718c 2793 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 2794 int old_master, r;
22936833 2795
dd3efc09 2796 assert(link);
b8941f74 2797 assert(link->ifname);
22936833
TG		 2798 assert(m);
2799
7619683b 2800 if (link->state == LINK_STATE_LINGER) {
5238e957 2801 log_link_info(link, "Link re-added");
289e6774 2802 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 2803
2804 r = link_new_carrier_maps(link);
2805 if (r < 0)
2806 return r;
7619683b
TG		 2807 }
2808
1c4baffc 2809 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 2810 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 2811 Manager *manager = link->manager;
b8941f74 2812
30de2b89 2813 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 2814
30de2b89
YW		 2815 link_drop(link);
2816 r = link_add(manager, m, &link);
2817 if (r < 0)
2818 return r;
b8941f74
TG		 2819 }
2820
572b21d9
YW		 2821 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
2822 if (r >= 0)
2823 strv_free_and_replace(link->alternative_names, s);
2824
1c4baffc 2825 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 2826 if (r >= 0 && mtu > 0) {
2827 link->mtu = mtu;
4e964aa0 2828 if (link->original_mtu == 0) {
afe7fd56 2829 link->original_mtu = mtu;
6a7a4e4d 2830 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 2831 }
2832
2833 if (link->dhcp_client) {
3c9b8860
TG		 2834 r = sd_dhcp_client_set_mtu(link->dhcp_client,
2835 link->mtu);
fc95c359
YW		 2836 if (r < 0)
2837 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 2838 }
7465dd22
PF		 2839
2840 if (link->radv) {
2841 r = sd_radv_set_mtu(link->radv, link->mtu);
2842 if (r < 0)
2843 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
2844 }
9842de0d 2845 }
69629de9 2846
e9189a1f
TG		 2847 /* The kernel may broadcast NEWLINK messages without the MAC address
2848 set, simply ignore them. */
b8162cd2
TR		 2849 r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr);
2850 if (r >= 0 && (link->hw_addr.length != hw_addr.length ||
2851 memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) {
807667f7 2852
b8162cd2 2853 memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length);
807667f7 2854
b8162cd2 2855 log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr));
807667f7 2856
a3adb4a6
YW		 2857 r = ipv4ll_update_mac(link);
2858 if (r < 0)
2859 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
807667f7 2860
d947f7f9
YW		 2861 r = dhcp4_update_mac(link);
2862 if (r < 0)
2863 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
413708d1 2864
eebba6dc
YW		 2865 r = dhcp6_update_mac(link);
2866 if (r < 0)
2867 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
7465dd22 2868
d0c4275c 2869 r = radv_update_mac(link);
be9363cc
YW		 2870 if (r < 0)
2871 return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
807667f7
YW		 2872
2873 if (link->ndisc) {
b8162cd2 2874 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether);
807667f7
YW		 2875 if (r < 0)
2876 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
2877 }
d93d655c 2878
dfc58b47
YW		 2879 if (link->lldp) {
2880 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether);
2881 if (r < 0)
2882 return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m");
2883 }
2884
d93d655c
YW		 2885 r = ipv4_dad_update_mac(link);
2886 if (r < 0)
2887 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
4f882b2a
TG		 2888 }
2889
bb262ef0
YW		 2890 old_master = link->master_ifindex;
2891 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
2892
d236718c 2893 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 2894 had_carrier = link_has_carrier(link);
2895
bb262ef0 2896 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 2897 if (r < 0)
2898 return r;
2899
d236718c
DS		 2900 if (!link_was_admin_up && (link->flags & IFF_UP)) {
2901 log_link_info(link, "Link UP");
2902
2903 r = link_admin_state_up(link);
2904 if (r < 0)
2905 return r;
61135582 2906 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
d236718c
DS		 2907 log_link_info(link, "Link DOWN");
2908
61135582
DS		 2909 r = link_admin_state_down(link);
2910 if (r < 0)
2911 return r;
2912 }
2913
273eec24
LP		 2914 r = link_update_lldp(link);
2915 if (r < 0)
2916 return r;
2917
a61bb41c
TG		 2918 carrier_gained = !had_carrier && link_has_carrier(link);
2919 carrier_lost = had_carrier && !link_has_carrier(link);
2920
2921 if (carrier_gained) {
6a7a4e4d 2922 log_link_info(link, "Gained carrier");
a61bb41c 2923
9c0a72f9
TG		 2924 r = link_carrier_gained(link);
2925 if (r < 0)
2926 return r;
a61bb41c 2927 } else if (carrier_lost) {
6a7a4e4d 2928 log_link_info(link, "Lost carrier");
a61bb41c 2929
9c0a72f9
TG		 2930 r = link_carrier_lost(link);
2931 if (r < 0)
a61bb41c 2932 return r;
a61bb41c
TG		 2933 }
2934
2935 return 0;
dd3efc09 2936}
fe8db0c5 2937
3be9d62a
YW		 2938int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
2939 Link *link = NULL;
2940 NetDev *netdev = NULL;
2941 uint16_t type;
2942 const char *name;
2943 int r, ifindex;
2944
2945 assert(rtnl);
2946 assert(message);
2947 assert(m);
2948
2949 if (sd_netlink_message_is_error(message)) {
2950 r = sd_netlink_message_get_errno(message);
2951 if (r < 0)
2952 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2953
2954 return 0;
2955 }
2956
2957 r = sd_netlink_message_get_type(message, &type);
2958 if (r < 0) {
2959 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2960 return 0;
2961 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2962 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2963 return 0;
2964 }
2965
2966 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2967 if (r < 0) {
2968 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2969 return 0;
2970 } else if (ifindex <= 0) {
2971 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2972 return 0;
2973 }
2974
2975 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2976 if (r < 0) {
2977 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2978 return 0;
2979 }
2980
2981 (void) link_get(m, ifindex, &link);
2982 (void) netdev_get(m, name, &netdev);
2983
2984 switch (type) {
2985 case RTM_NEWLINK:
2986 if (!link) {
2987 /* link is new, so add it */
2988 r = link_add(m, message, &link);
2989 if (r < 0) {
2990 log_warning_errno(r, "Could not process new link message, ignoring: %m");
2991 return 0;
2992 }
2993 }
2994
2995 if (netdev) {
2996 /* netdev exists, so make sure the ifindex matches */
2997 r = netdev_set_ifindex(netdev, message);
2998 if (r < 0) {
2999 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
3000 return 0;
3001 }
3002 }
3003
3004 r = link_update(link, message);
3005 if (r < 0) {
3006 log_warning_errno(r, "Could not process link message, ignoring: %m");
3007 return 0;
3008 }
3009
3010 break;
3011
3012 case RTM_DELLINK:
3013 link_drop(link);
3014 netdev_drop(netdev);
3015
3016 break;
3017
3018 default:
3019 assert_not_reached("Received link message with invalid RTNL message type.");
3020 }
3021
3022 return 1;
3023}
3024
fe8db0c5 3025static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 3026 [LINK_STATE_PENDING] = "pending",
bd08ce56 3027 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 3028 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 3029 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 3030 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 3031 [LINK_STATE_FAILED] = "failed",
370e9930 3032 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 3033};
3034
3035DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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