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network: make request_drop() accept NULL
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
db9ecf05 1/* SPDX-License-Identifier: LGPL-2.1-or-later */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
8430841b 7#include <sys/socket.h>
4cc7a82c 8#include <unistd.h>
f579559b 9
b5efdb8a 10#include "alloc-util.h"
c0267a59 11#include "batadv.h"
737f1405
YW		 12#include "bond.h"
13#include "bridge.h"
1346b1f0 14#include "bus-util.h"
3be9d62a
YW		 15#include "device-private.h"
16#include "device-util.h"
27dfc982 17#include "dhcp-identifier.h"
bd91b83e 18#include "dhcp-lease-internal.h"
686d13b9 19#include "env-file.h"
4bb7cc82 20#include "ethtool-util.h"
3ffd4af2 21#include "fd-util.h"
cf1d700d 22#include "fileio.h"
af664001 23#include "fs-util.h"
737f1405 24#include "ipvlan.h"
ef118d00 25#include "missing_network.h"
cf1d700d 26#include "netlink-util.h"
c6f7c917 27#include "network-internal.h"
fb486c90 28#include "networkd-address-label.h"
093e3533 29#include "networkd-address.h"
9671ae9d 30#include "networkd-bridge-fdb.h"
ff9e0783 31#include "networkd-bridge-mdb.h"
3ddcbeea 32#include "networkd-can.h"
8fcf1d61 33#include "networkd-dhcp-server.h"
ca5ad760
YW		 34#include "networkd-dhcp4.h"
35#include "networkd-dhcp6.h"
36#include "networkd-ipv4ll.h"
76c5a0f2 37#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 38#include "networkd-link-bus.h"
39#include "networkd-link.h"
8e1ad1ea 40#include "networkd-lldp-tx.h"
23f53b99 41#include "networkd-manager.h"
1e7a0e21 42#include "networkd-ndisc.h"
e4a71bf3 43#include "networkd-neighbor.h"
75156ccb 44#include "networkd-nexthop.h"
19d9a5ad 45#include "networkd-queue.h"
7465dd22 46#include "networkd-radv.h"
bce67bbe 47#include "networkd-routing-policy-rule.h"
0fa8ee6c 48#include "networkd-setlink.h"
19d9a5ad 49#include "networkd-sriov.h"
3b5a4fc6 50#include "networkd-state-file.h"
19d9a5ad 51#include "networkd-sysctl.h"
8d968fdd 52#include "networkd-wifi.h"
cf1d700d
TG		 53#include "set.h"
54#include "socket-util.h"
bf331d87 55#include "stat-util.h"
15a5e950 56#include "stdio-util.h"
8b43440b 57#include "string-table.h"
51517f9e 58#include "strv.h"
34658df2 59#include "tc.h"
e4de7287 60#include "tmpfile-util.h"
299ad32d 61#include "udev-util.h"
cf1d700d 62#include "util.h"
737f1405 63#include "vrf.h"
fc2f9534 64
3ca1fab7 65bool link_ipv4ll_enabled(Link *link) {
b9d74c40
LP		 66 assert(link);
67
78c958f8
TG		 68 if (link->flags & IFF_LOOPBACK)
69 return false;
70
71 if (!link->network)
72 return false;
73
500b96eb 74 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 75 return false;
76
a1e35fca
YW		 77 if (link->hw_addr.length != ETH_ALEN)
78 return false;
79
80 if (ether_addr_is_null(&link->hw_addr.ether))
81 return false;
82
98d20a17 83 if (STRPTR_IN_SET(link->kind,
84 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 85 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 86 return false;
87
f410d463
YW		 88 /* L3 or L3S mode do not support ARP. */
89 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
90 return false;
91
f2bfcdb9
YW		 92 if (link->network->bond)
93 return false;
94
3ca1fab7 95 return link->network->link_local & ADDRESS_FAMILY_IPV4;
8bc17bb3
SS		 96}
97
f8f2f880 98bool link_ipv6ll_enabled(Link *link) {
b9d74c40
LP		 99 assert(link);
100
fa709992
LP		 101 if (!socket_ipv6_is_supported())
102 return false;
103
d0d6a4cd
TG		 104 if (link->flags & IFF_LOOPBACK)
105 return false;
106
107 if (!link->network)
108 return false;
109
500b96eb 110 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 111 return false;
112
113 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 114 return false;
115
f2bfcdb9
YW		 116 if (link->network->bond)
117 return false;
118
e0ee46f2 119 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 120}
121
5e0534f1 122bool link_ipv6_enabled(Link *link) {
439689c6
SS		 123 assert(link);
124
125 if (!socket_ipv6_is_supported())
126 return false;
127
b102cdca 128 if (link->network->bond)
2b00a4e0
TY		 129 return false;
130
500b96eb 131 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 132 return false;
133
4cef7fe3 134 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 135 if (link_ipv6ll_enabled(link))
136 return true;
137
138 if (network_has_static_ipv6_configurations(link->network))
139 return true;
140
141 return false;
439689c6
SS		 142}
143
7191a57a
YW		 144bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) {
145 assert(link);
146
8e4b1b35 147 if (!link->network) {
7191a57a
YW		 148 if (!allow_unmanaged)
149 return false;
150
151 return link_has_carrier(link);
152 }
153
154 if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED))
155 return false;
156
baa95d22
YW		 157 if (!link->network->configure_without_carrier) {
158 if (link->set_flags_messages > 0)
159 return false;
160
161 if (!link_has_carrier(link))
162 return false;
163 }
7191a57a 164
0fa8ee6c
YW		 165 if (link->set_link_messages > 0)
166 return false;
167
71a754f7
YW		 168 if (!link->stacked_netdevs_created)
169 return false;
71a754f7 170
112a0972
YW		 171 if (!link->activated)
172 return false;
112a0972 173
7191a57a
YW		 174 return true;
175}
176
15761549
YW		 177void link_ntp_settings_clear(Link *link) {
178 link->ntp = strv_free(link->ntp);
179}
180
181void link_dns_settings_clear(Link *link) {
f5fbe71d 182 if (link->n_dns != UINT_MAX)
e77bd3fd
YW		 183 for (unsigned i = 0; i < link->n_dns; i++)
184 in_addr_full_free(link->dns[i]);
15761549 185 link->dns = mfree(link->dns);
f5fbe71d 186 link->n_dns = UINT_MAX;
15761549 187
6e4571f0
YW		 188 link->search_domains = ordered_set_free(link->search_domains);
189 link->route_domains = ordered_set_free(link->route_domains);
15761549
YW		 190
191 link->dns_default_route = -1;
192 link->llmnr = _RESOLVE_SUPPORT_INVALID;
193 link->mdns = _RESOLVE_SUPPORT_INVALID;
194 link->dnssec_mode = _DNSSEC_MODE_INVALID;
195 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
196
197 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
198}
199
1a6bb31f
YW		 200static void link_free_engines(Link *link) {
201 if (!link)
202 return;
203
204 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
205 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
206 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1c494872 207 link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd);
1a6bb31f
YW		 208
209 link->lldp = sd_lldp_unref(link->lldp);
1c494872 210 link_lldp_emit_stop(link);
1a6bb31f
YW		 211
212 ndisc_flush(link);
213
214 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
215 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 216 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 217 link->ndisc = sd_ndisc_unref(link->ndisc);
218 link->radv = sd_radv_unref(link->radv);
7abe175c
YW		 219
220 ipv4_dad_unref(link);
1a6bb31f
YW		 221}
222
8301aa0b 223static Link *link_free(Link *link) {
8301aa0b 224 assert(link);
f579559b 225
15761549
YW		 226 link_ntp_settings_clear(link);
227 link_dns_settings_clear(link);
228
8eec0b9d
YW		 229 link->routes = set_free(link->routes);
230 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 231 link->dhcp_routes = set_free(link->dhcp_routes);
232 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 233 link->dhcp6_routes = set_free(link->dhcp6_routes);
234 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
235 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
236 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 237 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 238
8eec0b9d
YW		 239 link->nexthops = set_free(link->nexthops);
240 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 241
8eec0b9d
YW		 242 link->neighbors = set_free(link->neighbors);
243 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 244
8eec0b9d
YW		 245 link->addresses = set_free(link->addresses);
246 link->addresses_foreign = set_free(link->addresses_foreign);
aa651e88 247 link->pool_addresses = set_free(link->pool_addresses);
e5526518 248 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 249 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
250 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
251 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
252 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 253 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 254
4b409e85
YW		 255 link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes);
256
1a6bb31f 257 link_free_engines(link);
49699bac 258
c166a070 259 free(link->ifname);
572b21d9 260 strv_free(link->alternative_names);
ceac4078 261 free(link->kind);
8d968fdd 262 free(link->ssid);
c643bda5 263 free(link->driver);
6cad256d 264
a34e58d4
YW		 265 unlink_and_free(link->lease_file);
266 unlink_and_free(link->lldp_file);
267 unlink_and_free(link->state_file);
c166a070 268
51517f9e 269 sd_device_unref(link->sd_device);
b5db00e5 270
0d4ad91d 271 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 272 hashmap_free(link->bound_by_links);
273
5f707e12 274 set_free_with_destructor(link->slaves, link_unref);
033295c1 275
c9c908a6
YW		 276 network_unref(link->network);
277
8301aa0b 278 return mfree(link);
14b746f7
TG		 279}
280
8301aa0b 281DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 282
6eab614d 283int link_get_by_index(Manager *m, int ifindex, Link **ret) {
11a7f229 284 Link *link;
11a7f229
TG		 285
286 assert(m);
e856ed00 287 assert(ifindex > 0);
11a7f229 288
6eab614d 289 link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex));
11a7f229
TG		 290 if (!link)
291 return -ENODEV;
292
0b54c870
YW		 293 if (ret)
294 *ret = link;
295 return 0;
296}
297
298int link_get_by_name(Manager *m, const char *ifname, Link **ret) {
299 Link *link;
300
301 assert(m);
302 assert(ifname);
11a7f229 303
0b54c870
YW		 304 link = hashmap_get(m->links_by_name, ifname);
305 if (!link)
306 return -ENODEV;
307
308 if (ret)
309 *ret = link;
11a7f229
TG		 310 return 0;
311}
312
fe321d45
YW		 313int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) {
314 Link *link;
315
316 assert(m);
317 assert(hw_addr);
318
319 link = hashmap_get(m->links_by_hw_addr, hw_addr);
320 if (!link)
321 return -ENODEV;
322
323 if (ret)
324 *ret = link;
325 return 0;
326}
327
81357285
YW		 328int link_get_master(Link *link, Link **ret) {
329 assert(link);
330 assert(link->manager);
331 assert(ret);
332
333 if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex)
334 return -ENODEV;
335
6eab614d 336 return link_get_by_index(link->manager, link->master_ifindex, ret);
81357285
YW		 337}
338
af9ba57a 339void link_set_state(Link *link, LinkState state) {
e331e246
TG		 340 assert(link);
341
342 if (link->state == state)
343 return;
344
0beb9542
YW		 345 log_link_debug(link, "State changed: %s -> %s",
346 link_state_to_string(link->state),
347 link_state_to_string(state));
348
e331e246
TG		 349 link->state = state;
350
351 link_send_changed(link, "AdministrativeState", NULL);
9092113d 352 link_dirty(link);
e331e246
TG		 353}
354
2a99eed0 355int link_stop_engines(Link *link, bool may_keep_dhcp) {
111bb8f9
TG		 356 int r = 0, k;
357
358 assert(link);
359 assert(link->manager);
360 assert(link->manager->event);
361
80060352
ZJS		 362 bool keep_dhcp = may_keep_dhcp &&
363 link->network &&
364 (link->manager->restarting ||
365 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
366
84add3cd 367 if (!keep_dhcp) {
111bb8f9 368 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 369 if (k < 0)
36c7d709 370 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 371 }
372
84add3cd
YW		 373 k = sd_ipv4acd_stop(link->dhcp_acd);
374 if (k < 0)
375 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m");
a7df5cae 376
2a99eed0
YW		 377 k = sd_dhcp_server_stop(link->dhcp_server);
378 if (k < 0)
379 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m");
380
9cc65242
YW		 381 k = sd_lldp_stop(link->lldp);
382 if (k < 0)
383 r = log_link_warning_errno(link, k, "Could not stop LLDP: %m");
384
84add3cd
YW		 385 k = sd_ipv4ll_stop(link->ipv4ll);
386 if (k < 0)
387 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f 388
490ccbd5 389 k = ipv4_dad_stop(link);
2488e4d9
YW		 390 if (k < 0)
391 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
051e77ca 392
84add3cd
YW		 393 k = sd_dhcp6_client_stop(link->dhcp6_client);
394 if (k < 0)
395 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
4138fb2c 396
2ffd6d73
YW		 397 k = dhcp6_pd_remove(link);
398 if (k < 0)
399 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
1633c457 400
84add3cd
YW		 401 k = sd_ndisc_stop(link->ndisc);
402 if (k < 0)
403 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c 404
84add3cd
YW		 405 k = sd_radv_stop(link->radv);
406 if (k < 0)
407 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
7465dd22 408
7272b25e 409 link_lldp_emit_stop(link);
111bb8f9
TG		 410 return r;
411}
412
b22d8a00 413void link_enter_failed(Link *link) {
ef1ba606 414 assert(link);
f882c247 415
370e9930 416 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 417 return;
418
6a7a4e4d 419 log_link_warning(link, "Failed");
449f7554 420
e331e246 421 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 422
2a99eed0 423 (void) link_stop_engines(link, false);
f882c247
TG		 424}
425
6accfd31
DA		 426void link_check_ready(Link *link) {
427 Address *a;
6accfd31
DA		 428
429 assert(link);
430
5f58af25
YW		 431 if (link->state == LINK_STATE_CONFIGURED)
432 return;
433
d19b9939
YW		 434 if (link->state != LINK_STATE_CONFIGURING)
435 return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31
DA		 436
437 if (!link->network)
a7f07cbe 438 return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__);
6accfd31 439
7558f9e7
YW		 440 if (!link->tc_configured)
441 return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
600b7898 442
a7f07cbe
YW		 443 if (link->set_link_messages > 0)
444 return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__);
445
446 if (!link->activated)
447 return (void) log_link_debug(link, "%s(): link is not activated.", __func__);
448
7558f9e7
YW		 449 if (link->iftype == ARPHRD_CAN) {
450 /* let's shortcut things for CAN which doesn't need most of checks below. */
451 link_set_state(link, LINK_STATE_CONFIGURED);
452 return;
453 }
454
76c5a0f2 455 if (!link->static_addresses_configured)
d19b9939 456 return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 457
90e74a66 458 SET_FOREACH(a, link->addresses)
39373cb9
YW		 459 if (!address_is_ready(a)) {
460 _cleanup_free_ char *str = NULL;
461
5380707a
YW		 462 (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str);
463 return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str));
39373cb9 464 }
6aa5773b 465
354bc760
YW		 466 if (!link->static_address_labels_configured)
467 return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__);
468
e5b35bf6
YW		 469 if (!link->static_bridge_fdb_configured)
470 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
471
ff9e0783
YW		 472 if (!link->static_bridge_mdb_configured)
473 return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__);
474
fdeba3f5
YW		 475 if (!link->static_ipv6_proxy_ndp_configured)
476 return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__);
477
40ca350e
YW		 478 if (!link->static_neighbors_configured)
479 return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
480
d19b9939
YW		 481 if (!link->static_nexthops_configured)
482 return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 483
76c5a0f2
YW		 484 if (!link->static_routes_configured)
485 return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__);
486
0e5ef6be 487 if (!link->static_routing_policy_rules_configured)
d19b9939 488 return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 489
d19b9939
YW		 490 if (!link->sr_iov_configured)
491 return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 492
4bcb8625
YW		 493 /* IPv6LL is assigned after the link gains its carrier. */
494 if (!link->network->configure_without_carrier &&
495 link_ipv6ll_enabled(link) &&
496 !in6_addr_is_set(&link->ipv6ll_address))
497 return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__);
498
499 bool has_ndisc_address = false;
500 NDiscAddress *n;
501 SET_FOREACH(n, link->ndisc_addresses)
502 if (!n->marked) {
503 has_ndisc_address = true;
504 break;
505 }
50550722 506
4bcb8625
YW		 507 if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) &&
508 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
509 !link->ipv4ll_address_configured)
510 /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */
511 return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__);
512
513 /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */
514 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) ||
515 (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link)) ||
516 link_ipv4ll_enabled(link)) {
517
518 if (!link->dhcp4_configured &&
519 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
520 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
521 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
0d0799da 522 !link->ipv4ll_address_configured)
4bcb8625
YW		 523 /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */
524 return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
525
526 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",
527 __func__,
528 yes_no(link->dhcp4_configured),
529 yes_no(link->ipv4ll_address_configured),
530 yes_no(link->dhcp6_address_configured),
531 yes_no(link->dhcp6_route_configured),
532 yes_no(link->dhcp6_pd_address_configured),
533 yes_no(link->dhcp6_pd_route_configured),
534 yes_no(link->ndisc_addresses_configured),
535 yes_no(link->ndisc_routes_configured));
463797c1 536 }
6accfd31 537
29836c16 538 link_set_state(link, LINK_STATE_CONFIGURED);
6accfd31
DA		 539}
540
97108953 541static int link_request_static_configs(Link *link) {
f882c247
TG		 542 int r;
543
544 assert(link);
545 assert(link->network);
f5be5601 546 assert(link->state != _LINK_STATE_INVALID);
f882c247 547
354bc760 548 r = link_request_static_addresses(link);
0e5ef6be
YW		 549 if (r < 0)
550 return r;
551
354bc760 552 r = link_request_static_address_labels(link);
f3ef324d
YW		 553 if (r < 0)
554 return r;
e4a71bf3 555
e5b35bf6
YW		 556 r = link_request_static_bridge_fdb(link);
557 if (r < 0)
558 return r;
559
9a038aac
YW		 560 r = link_request_static_bridge_mdb(link);
561 if (r < 0)
562 return r;
563
fdeba3f5
YW		 564 r = link_request_static_ipv6_proxy_ndp_addresses(link);
565 if (r < 0)
566 return r;
567
40ca350e 568 r = link_request_static_neighbors(link);
682c65b0
YW		 569 if (r < 0)
570 return r;
bd6379ec 571
76c5a0f2 572 r = link_request_static_nexthops(link, false);
fe2bc17c
YW		 573 if (r < 0)
574 return r;
f882c247 575
76c5a0f2
YW		 576 r = link_request_static_routes(link, false);
577 if (r < 0)
578 return r;
579
580 r = link_request_static_routing_policy_rules(link);
5ae0fb7f
YW		 581 if (r < 0)
582 return r;
d4cdbea5 583
f882c247
TG		 584 return 0;
585}
586
1187fc33
YW		 587static int link_request_stacked_netdevs(Link *link) {
588 NetDev *netdev;
e16e4b3b
DS		 589 int r;
590
591 assert(link);
592
1187fc33
YW		 593 link->stacked_netdevs_created = false;
594 link->stacked_netdevs_after_configured_created = false;
e16e4b3b 595
1187fc33
YW		 596 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
597 r = link_request_to_crate_stacked_netdev(link, netdev);
598 if (r < 0)
599 return r;
600 }
e16e4b3b 601
1187fc33
YW		 602 if (link->create_stacked_netdev_messages == 0)
603 link->stacked_netdevs_created = true;
604 if (link->create_stacked_netdev_after_configured_messages == 0)
605 link->stacked_netdevs_after_configured_created = true;
e16e4b3b
DS		 606
607 return 0;
608}
609
8566df79 610static int link_acquire_dynamic_ipv6_conf(Link *link) {
e7ab854c
TG		 611 int r;
612
613 assert(link);
614
086b8853 615 if (link->radv) {
7465dd22 616 assert(link->radv);
94876904 617 assert(in6_addr_is_link_local(&link->ipv6ll_address));
7465dd22
PF		 618
619 log_link_debug(link, "Starting IPv6 Router Advertisements");
620
fd3ef936
YW		 621 r = radv_emit_dns(link);
622 if (r < 0)
623 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
624
7465dd22
PF		 625 r = sd_radv_start(link->radv);
626 if (r < 0 && r != -EBUSY)
627 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
628 }
629
294f129b
YW		 630 r = ndisc_start(link);
631 if (r < 0)
632 return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m");
cd305af1 633
294f129b
YW		 634 r = dhcp6_start(link);
635 if (r < 0)
636 return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m");
cd305af1 637
1633c457
YW		 638 r = dhcp6_request_prefix_delegation(link);
639 if (r < 0)
640 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 641
e7ab854c
TG		 642 return 0;
643}
644
8566df79 645static int link_acquire_dynamic_ipv4_conf(Link *link) {
ff254138
TG		 646 int r;
647
648 assert(link);
ff254138
TG		 649 assert(link->manager);
650 assert(link->manager->event);
651
0107b769 652 if (link->dhcp_client) {
294f129b 653 r = dhcp4_start(link);
0107b769 654 if (r < 0)
294f129b 655 return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m");
0107b769 656
0b4b66cc 657 } else if (link->ipv4ll) {
6a7a4e4d 658 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 659
660 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 661 if (r < 0)
662 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 663 }
664
ab486ef4
YW		 665 if (link->dhcp_server) {
666 r = sd_dhcp_server_start(link->dhcp_server);
667 if (r < 0)
668 return log_link_warning_errno(link, r, "Could not start DHCP server: %m");
669 }
670
6fc25497
SS		 671 return 0;
672}
673
8566df79 674static int link_acquire_dynamic_conf(Link *link) {
6fc25497
SS		 675 int r;
676
677 assert(link);
678
8566df79 679 r = link_acquire_dynamic_ipv4_conf(link);
6fc25497
SS		 680 if (r < 0)
681 return r;
682
94876904 683 if (in6_addr_is_set(&link->ipv6ll_address)) {
8566df79 684 r = link_acquire_dynamic_ipv6_conf(link);
6fc25497
SS		 685 if (r < 0)
686 return r;
687 }
688
2ffd6d73
YW		 689 r = link_lldp_emit_start(link);
690 if (r < 0)
691 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
8e1ad1ea 692
ff254138
TG		 693 return 0;
694}
695
0c9ee5d5
YW		 696int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
697 int r;
deb2e523 698
0c9ee5d5 699 assert(link);
deb2e523 700
0c9ee5d5 701 log_link_info(link, "Gained IPv6LL");
deb2e523 702
0c9ee5d5
YW		 703 link->ipv6ll_address = *address;
704 link_check_ready(link);
705
706 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
707 r = link_acquire_dynamic_ipv6_conf(link);
708 if (r < 0) {
709 link_enter_failed(link);
710 return r;
711 }
712 }
713
714 return 0;
deb2e523
TG		 715}
716
112a0972 717int link_handle_bound_to_list(Link *link) {
0d4ad91d
AR		 718 bool required_up = false;
719 bool link_is_up = false;
852a3916 720 Link *l;
0d4ad91d
AR		 721
722 assert(link);
723
ad82f0c3
YW		 724 /* If at least one interface in bound_to_links has carrier, then make this interface up.
725 * If all interfaces in bound_to_links do not, then make this interface down. */
726
0d4ad91d
AR		 727 if (hashmap_isempty(link->bound_to_links))
728 return 0;
729
730 if (link->flags & IFF_UP)
731 link_is_up = true;
732
852a3916 733 HASHMAP_FOREACH(l, link->bound_to_links)
0d4ad91d
AR		 734 if (link_has_carrier(l)) {
735 required_up = true;
736 break;
737 }
738
852a3916 739 if (!required_up && link_is_up)
68f52063 740 return link_request_to_bring_up_or_down(link, /* up = */ false);
852a3916 741 if (required_up && !link_is_up)
68f52063 742 return link_request_to_bring_up_or_down(link, /* up = */ true);
0d4ad91d
AR		 743
744 return 0;
745}
746
747static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 748 Link *l;
749 int r;
750
751 assert(link);
752
ad82f0c3
YW		 753 /* Update up or down state of interfaces which depend on this interface's carrier state. */
754
0d4ad91d
AR		 755 if (hashmap_isempty(link->bound_by_links))
756 return 0;
757
852a3916 758 HASHMAP_FOREACH(l, link->bound_by_links) {
0d4ad91d
AR		 759 r = link_handle_bound_to_list(l);
760 if (r < 0)
761 return r;
762 }
763
764 return 0;
765}
766
767static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
768 int r;
769
770 assert(link);
771 assert(carrier);
772
773 if (link == carrier)
774 return 0;
775
776 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
777 return 0;
778
190b3b5c 779 r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier);
0d4ad91d
AR		 780 if (r < 0)
781 return r;
782
9092113d
YW		 783 link_dirty(link);
784
0d4ad91d
AR		 785 return 0;
786}
787
788static int link_new_bound_by_list(Link *link) {
789 Manager *m;
790 Link *carrier;
0d4ad91d 791 int r;
0d4ad91d
AR		 792
793 assert(link);
794 assert(link->manager);
795
796 m = link->manager;
797
6eab614d 798 HASHMAP_FOREACH(carrier, m->links_by_index) {
0d4ad91d
AR		 799 if (!carrier->network)
800 continue;
801
802 if (strv_isempty(carrier->network->bind_carrier))
803 continue;
804
191a3f16 805 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 806 r = link_put_carrier(link, carrier, &link->bound_by_links);
807 if (r < 0)
808 return r;
0d4ad91d
AR		 809 }
810 }
811
90e74a66 812 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 813 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
814 if (r < 0)
815 return r;
0d4ad91d
AR		 816 }
817
818 return 0;
819}
820
821static int link_new_bound_to_list(Link *link) {
822 Manager *m;
823 Link *carrier;
0d4ad91d 824 int r;
0d4ad91d
AR		 825
826 assert(link);
827 assert(link->manager);
828
829 if (!link->network)
830 return 0;
831
832 if (strv_isempty(link->network->bind_carrier))
833 return 0;
834
835 m = link->manager;
836
6eab614d 837 HASHMAP_FOREACH(carrier, m->links_by_index) {
191a3f16 838 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 839 r = link_put_carrier(link, carrier, &link->bound_to_links);
840 if (r < 0)
841 return r;
0d4ad91d
AR		 842 }
843 }
844
852a3916 845 HASHMAP_FOREACH(carrier, link->bound_to_links) {
0d4ad91d
AR		 846 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
847 if (r < 0)
848 return r;
0d4ad91d
AR		 849 }
850
851 return 0;
852}
853
854static int link_new_carrier_maps(Link *link) {
855 int r;
856
857 r = link_new_bound_by_list(link);
858 if (r < 0)
859 return r;
860
861 r = link_handle_bound_by_list(link);
862 if (r < 0)
863 return r;
864
865 r = link_new_bound_to_list(link);
866 if (r < 0)
867 return r;
868
852a3916 869 return link_handle_bound_to_list(link);
0d4ad91d
AR		 870}
871
872static void link_free_bound_to_list(Link *link) {
9092113d 873 bool updated = false;
0d4ad91d 874 Link *bound_to;
0d4ad91d 875
9092113d
YW		 876 assert(link);
877
878 while ((bound_to = hashmap_steal_first(link->bound_to_links))) {
879 updated = true;
0d4ad91d
AR		 880
881 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 882 link_dirty(bound_to);
0d4ad91d
AR		 883 }
884
9092113d
YW		 885 if (updated)
886 link_dirty(link);
0d4ad91d
AR		 887}
888
889static void link_free_bound_by_list(Link *link) {
9092113d 890 bool updated = false;
0d4ad91d 891 Link *bound_by;
0d4ad91d 892
9092113d
YW		 893 assert(link);
894
895 while ((bound_by = hashmap_steal_first(link->bound_by_links))) {
896 updated = true;
0d4ad91d
AR		 897
898 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 899 link_dirty(bound_by);
0d4ad91d
AR		 900 link_handle_bound_to_list(bound_by);
901 }
902 }
903
9092113d
YW		 904 if (updated)
905 link_dirty(link);
0d4ad91d
AR		 906}
907
908static void link_free_carrier_maps(Link *link) {
0d4ad91d
AR		 909 assert(link);
910
9092113d
YW		 911 link_free_bound_to_list(link);
912 link_free_bound_by_list(link);
0d4ad91d
AR		 913}
914
81357285 915static int link_append_to_master(Link *link) {
5f707e12
YW		 916 Link *master;
917 int r;
918
919 assert(link);
5f707e12 920
81357285
YW		 921 /* - The link may have no master.
922 * - RTM_NEWLINK message about master interface may not be received yet. */
923 if (link_get_master(link, &master) < 0)
924 return 0;
5f707e12 925
de7fef4b 926 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 927 if (r <= 0)
5f707e12
YW		 928 return r;
929
930 link_ref(link);
931 return 0;
932}
933
81357285 934static void link_drop_from_master(Link *link) {
5f707e12
YW		 935 Link *master;
936
937 assert(link);
938
81357285 939 if (!link->manager)
5f707e12
YW		 940 return;
941
81357285 942 if (link_get_master(link, &master) < 0)
5f707e12
YW		 943 return;
944
945 link_unref(set_remove(master->slaves, link));
946}
947
56001f02
YW		 948static void link_drop_requests(Link *link) {
949 Request *req;
950
951 assert(link);
952 assert(link->manager);
953
954 ORDERED_SET_FOREACH(req, link->manager->request_queue)
955 if (req->link == link)
956 request_drop(req);
957}
958
cc2d7efc 959static Link *link_drop(Link *link) {
0b54c870
YW		 960 char **n;
961
63130eb3 962 if (!link)
cc2d7efc 963 return NULL;
0d4ad91d 964
63130eb3
YW		 965 assert(link->manager);
966
0d4ad91d
AR		 967 link_set_state(link, LINK_STATE_LINGER);
968
63130eb3
YW		 969 /* Drop all references from other links and manager. Note that async netlink calls may have
970 * references to the link, and they will be dropped when we receive replies. */
971
56001f02
YW		 972 link_drop_requests(link);
973
0d4ad91d
AR		 974 link_free_carrier_maps(link);
975
81357285 976 link_drop_from_master(link);
5f707e12 977
63130eb3 978 link_unref(set_remove(link->manager->links_requesting_uuid, link));
0d4ad91d 979
db2f8a2e 980 (void) unlink(link->state_file);
63130eb3
YW		 981 link_clean(link);
982
0b54c870
YW		 983 STRV_FOREACH(n, link->alternative_names)
984 hashmap_remove(link->manager->links_by_name, *n);
0b54c870
YW		 985 hashmap_remove(link->manager->links_by_name, link->ifname);
986
fe321d45
YW		 987 /* bonding master and its slaves have the same hardware address. */
988 if (hashmap_get(link->manager->links_by_hw_addr, &link->hw_addr) == link)
989 hashmap_remove(link->manager->links_by_hw_addr, &link->hw_addr);
990
63130eb3 991 /* The following must be called at last. */
6eab614d 992 assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link);
cc2d7efc 993 return link_unref(link);
0d4ad91d
AR		 994}
995
5e5b137a 996static int link_drop_foreign_config(Link *link) {
0b81225e
YW		 997 int k, r;
998
999 assert(link);
1000 assert(link->manager);
5e5b137a 1001
e36d601c 1002 r = link_drop_foreign_routes(link);
5e5b137a 1003
e36d601c 1004 k = link_drop_foreign_nexthops(link);
0b81225e
YW		 1005 if (k < 0 && r >= 0)
1006 r = k;
1007
e36d601c 1008 k = link_drop_foreign_addresses(link);
0b81225e
YW		 1009 if (k < 0 && r >= 0)
1010 r = k;
d1bdafd2 1011
e36d601c 1012 k = link_drop_foreign_neighbors(link);
25b82b6e
YW		 1013 if (k < 0 && r >= 0)
1014 r = k;
1015
0b81225e
YW		 1016 k = manager_drop_foreign_routing_policy_rules(link->manager);
1017 if (k < 0 && r >= 0)
1018 r = k;
1019
1020 return r;
5e5b137a
TG		 1021}
1022
3104883d 1023static int link_drop_config(Link *link) {
0b81225e
YW		 1024 int k, r;
1025
1026 assert(link);
1027 assert(link->manager);
3104883d 1028
e36d601c 1029 r = link_drop_routes(link);
3104883d 1030
e36d601c 1031 k = link_drop_nexthops(link);
0b81225e
YW		 1032 if (k < 0 && r >= 0)
1033 r = k;
d1bdafd2 1034
e36d601c 1035 k = link_drop_addresses(link);
0b81225e
YW		 1036 if (k < 0 && r >= 0)
1037 r = k;
1038
e36d601c 1039 k = link_drop_neighbors(link);
25b82b6e
YW		 1040 if (k < 0 && r >= 0)
1041 r = k;
1042
0b81225e
YW		 1043 k = manager_drop_routing_policy_rules(link->manager, link);
1044 if (k < 0 && r >= 0)
1045 r = k;
3104883d 1046
c69305ff
LP		 1047 ndisc_flush(link);
1048
0b81225e 1049 return r;
3104883d
SS		 1050}
1051
c3b94251 1052static int link_configure(Link *link) {
4ecdcb07
YW		 1053 int r;
1054
ef1ba606 1055 assert(link);
b22d8a00 1056 assert(link->network);
bd08ce56 1057 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 1058
1187fc33
YW		 1059 link_set_state(link, LINK_STATE_CONFIGURING);
1060
34658df2 1061 r = link_configure_traffic_control(link);
4ecdcb07
YW		 1062 if (r < 0)
1063 return r;
1064
7558f9e7
YW		 1065 if (link->iftype == ARPHRD_CAN) {
1066 /* let's shortcut things for CAN which doesn't need most of what's done below. */
1067 r = link_request_to_set_can(link);
1068 if (r < 0)
1069 return r;
1070
1071 return link_request_to_activate(link);
1072 }
1073
518cd6b5
SS		 1074 r = link_configure_sr_iov(link);
1075 if (r < 0)
1076 return r;
1077
5e0534f1 1078 r = link_set_sysctl(link);
b69c3180
SS		 1079 if (r < 0)
1080 return r;
8749cbcd 1081
d05c332c 1082 r = link_request_to_set_mac(link, /* allow_retry = */ true);
e16e4b3b
DS		 1083 if (r < 0)
1084 return r;
1085
1187fc33 1086 r = link_request_to_set_flags(link);
e16e4b3b
DS		 1087 if (r < 0)
1088 return r;
1089
1187fc33 1090 r = link_request_to_set_group(link);
99d2baa2
SS		 1091 if (r < 0)
1092 return r;
1093
1187fc33
YW		 1094 r = link_configure_mtu(link);
1095 if (r < 0)
1096 return r;
1097
1098 r = link_request_to_set_addrgen_mode(link);
1099 if (r < 0)
1100 return r;
1101
1102 r = link_request_to_set_master(link);
1103 if (r < 0)
1104 return r;
1105
1106 r = link_request_stacked_netdevs(link);
1107 if (r < 0)
1108 return r;
1109
1110 r = link_request_to_set_bond(link);
1111 if (r < 0)
1112 return r;
1113
1114 r = link_request_to_set_bridge(link);
1115 if (r < 0)
1116 return r;
1117
1118 r = link_request_to_set_bridge_vlan(link);
1119 if (r < 0)
1120 return r;
1121
1122 r = link_request_to_activate(link);
89fe6535
SS		 1123 if (r < 0)
1124 return r;
1125
2ffd6d73
YW		 1126 r = ipv4ll_configure(link);
1127 if (r < 0)
1128 return r;
64b21ece 1129
2ffd6d73
YW		 1130 r = dhcp4_configure(link);
1131 if (r < 0)
1132 return r;
eb34d4af 1133
2ffd6d73
YW		 1134 r = dhcp6_configure(link);
1135 if (r < 0)
1136 return r;
f5a8c43f 1137
2ffd6d73
YW		 1138 r = ndisc_configure(link);
1139 if (r < 0)
1140 return r;
4138fb2c 1141
1d28a3cf
YW		 1142 r = link_request_dhcp_server(link);
1143 if (r < 0)
1144 return r;
1145
086b8853
YW		 1146 r = radv_configure(link);
1147 if (r < 0)
1148 return r;
7465dd22 1149
2ffd6d73
YW		 1150 r = link_lldp_rx_configure(link);
1151 if (r < 0)
1152 return r;
ce43e484 1153
4c649652
DS		 1154 /* Drop foreign config, but ignore loopback or critical devices.
1155 * We do not want to remove loopback address or addresses used for root NFS. */
1156 if (!(link->flags & IFF_LOOPBACK) &&
1157 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
1158 r = link_drop_foreign_config(link);
1159 if (r < 0)
1160 return r;
1161 }
1162
1187fc33
YW		 1163 r = link_request_static_configs(link);
1164 if (r < 0)
1165 return r;
1166
1167 if (!link_has_carrier(link))
1168 return 0;
1169
1170 return link_acquire_dynamic_conf(link);
505f8da7
TG		 1171}
1172
170e88c8
YW		 1173static int link_get_network(Link *link, Network **ret) {
1174 Network *network;
1a3caa49 1175 int r;
170e88c8
YW		 1176
1177 assert(link);
1178 assert(link->manager);
1179 assert(ret);
1180
1181 ORDERED_HASHMAP_FOREACH(network, link->manager->networks) {
1182 bool warn = false;
1183
1a3caa49 1184 r = net_match_config(
170e88c8
YW		 1185 &network->match,
1186 link->sd_device,
ca2b7cd8 1187 &link->hw_addr.ether,
170e88c8
YW		 1188 &link->permanent_mac,
1189 link->driver,
1190 link->iftype,
1191 link->ifname,
1192 link->alternative_names,
1193 link->wlan_iftype,
1194 link->ssid,
1a3caa49
YW		 1195 &link->bssid);
1196 if (r < 0)
1197 return r;
1198 if (r == 0)
170e88c8
YW		 1199 continue;
1200
1201 if (network->match.ifname && link->sd_device) {
1202 uint8_t name_assign_type = NET_NAME_UNKNOWN;
1203 const char *attr;
1204
1205 if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0)
1206 (void) safe_atou8(attr, &name_assign_type);
1207
1208 warn = name_assign_type == NET_NAME_ENUM;
1209 }
1210
1211 log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG,
1212 "found matching network '%s'%s.",
1213 network->filename,
1214 warn ? ", based on potentially unpredictable interface name" : "");
1215
1216 if (network->unmanaged)
1217 return -ENOENT;
1218
1219 *ret = network;
1220 return 0;
1221 }
1222
1223 return -ENOENT;
1224}
1225
7f80fa12 1226static int link_reconfigure_impl(Link *link, bool force) {
ad932b15
YW		 1227 Network *network;
1228 int r;
1229
5a1860f7 1230 assert(link);
572b21d9 1231
170e88c8 1232 r = link_get_network(link, &network);
ad932b15 1233 if (r == -ENOENT) {
29836c16 1234 link_set_state(link, LINK_STATE_UNMANAGED);
ad932b15 1235 return 0;
170e88c8
YW		 1236 }
1237 if (r < 0)
ad932b15
YW		 1238 return r;
1239
99b8517c 1240 if (link->network == network && !force)
ad932b15
YW		 1241 return 0;
1242
1243 log_link_info(link, "Re-configuring with %s", network->filename);
1244
1245 /* Dropping old .network file */
2a99eed0 1246 r = link_stop_engines(link, false);
572b21d9 1247 if (r < 0)
ad932b15 1248 return r;
ad932b15 1249
19d9a5ad
YW		 1250 link_drop_requests(link);
1251
ad932b15
YW		 1252 r = link_drop_config(link);
1253 if (r < 0)
1254 return r;
1255
2c7b826d 1256 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 1257 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
ad932b15
YW		 1258 r = link_drop_foreign_config(link);
1259 if (r < 0)
1260 return r;
1261 }
1262
1263 link_free_carrier_maps(link);
1264 link_free_engines(link);
1265 link->network = network_unref(link->network);
59c31eba 1266 link_unref(set_remove(link->manager->links_requesting_uuid, link));
ad932b15
YW		 1267
1268 /* Then, apply new .network file */
9092113d 1269 link->network = network_ref(network);
b156a95d 1270 link_update_operstate(link, true);
9092113d 1271 link_dirty(link);
ad932b15
YW		 1272
1273 r = link_new_carrier_maps(link);
1274 if (r < 0)
1275 return r;
1276
1277 link_set_state(link, LINK_STATE_INITIALIZED);
61135582 1278 link->activated = false;
ad932b15 1279
ad932b15
YW		 1280 r = link_configure(link);
1281 if (r < 0)
1282 return r;
1283
0e397560 1284 return 1;
ad932b15
YW		 1285}
1286
5a1860f7 1287static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) {
572b21d9
YW		 1288 int r;
1289
5a1860f7
YW		 1290 r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state");
1291 if (r <= 0)
1292 return r;
1293
7f80fa12 1294 r = link_reconfigure_impl(link, force);
572b21d9
YW		 1295 if (r < 0)
1296 link_enter_failed(link);
1297
5a1860f7 1298 return 0;
572b21d9
YW		 1299}
1300
5a1860f7
YW		 1301static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1302 return link_reconfigure_handler_internal(rtnl, m, link, false);
1303}
572b21d9 1304
5a1860f7
YW		 1305static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1306 return link_reconfigure_handler_internal(rtnl, m, link, true);
572b21d9
YW		 1307}
1308
1309int link_reconfigure(Link *link, bool force) {
572b21d9
YW		 1310 int r;
1311
8bceafa7 1312 /* When link in pending or initialized state, then link_configure() will be called. To prevent
f8dd4077
ZJS		 1313 * the function from being called multiple times simultaneously, refuse to reconfigure the
1314 * interface in these cases. */
8bceafa7 1315 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER))
f8dd4077 1316 return 0; /* 0 means no-op. */
2c0d7ed3 1317
5a1860f7 1318 r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler);
572b21d9
YW		 1319 if (r < 0)
1320 return r;
1321
8bceafa7 1322 return 1; /* 1 means the interface will be reconfigured. */
572b21d9
YW		 1323}
1324
e6bf7774 1325static int link_initialized_and_synced(Link *link) {
505f8da7 1326 Network *network;
505f8da7
TG		 1327 int r;
1328
1329 assert(link);
1330 assert(link->ifname);
1331 assert(link->manager);
1332
bd08ce56 1333 /* We may get called either from the asynchronous netlink callback,
0d411b7f 1334 * or directly from link_check_initialized() if running in a container. */
bd08ce56 1335 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 1336 return 0;
505f8da7 1337
6a7a4e4d 1338 log_link_debug(link, "Link state is up-to-date");
bd08ce56 1339 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 1340
0d4ad91d
AR		 1341 r = link_new_bound_by_list(link);
1342 if (r < 0)
1343 return r;
1344
1345 r = link_handle_bound_by_list(link);
1346 if (r < 0)
1347 return r;
1348
c4a03a56 1349 if (!link->network) {
0894cfe4 1350 r = wifi_get_info(link);
8d968fdd
YW		 1351 if (r < 0)
1352 return r;
1353
170e88c8 1354 r = link_get_network(link, &network);
c4a03a56 1355 if (r == -ENOENT) {
29836c16 1356 link_set_state(link, LINK_STATE_UNMANAGED);
4232cf04 1357 return 0;
170e88c8
YW		 1358 }
1359 if (r < 0)
c4a03a56 1360 return r;
505f8da7 1361
c4a03a56
TG		 1362 if (link->flags & IFF_LOOPBACK) {
1363 if (network->link_local != ADDRESS_FAMILY_NO)
1364 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 1365
c4a03a56
TG		 1366 if (network->dhcp != ADDRESS_FAMILY_NO)
1367 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 1368
c4a03a56
TG		 1369 if (network->dhcp_server)
1370 log_link_debug(link, "Ignoring DHCP server for loopback link");
1371 }
bd2efe92 1372
9092113d 1373 link->network = network_ref(network);
bcdcc596 1374 link_update_operstate(link, false);
9092113d 1375 link_dirty(link);
c4a03a56 1376 }
505f8da7 1377
0d4ad91d
AR		 1378 r = link_new_bound_to_list(link);
1379 if (r < 0)
1380 return r;
1381
852a3916 1382 return link_configure(link);
505f8da7
TG		 1383}
1384
302a796f 1385static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4ff296b0
YW		 1386 int r;
1387
5a1860f7
YW		 1388 r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized");
1389 if (r <= 0)
0b54c870 1390 return r;
572b21d9 1391
4ff296b0
YW		 1392 r = link_initialized_and_synced(link);
1393 if (r < 0)
1394 link_enter_failed(link);
5a1860f7
YW		 1395
1396 return 0;
e6bf7774
YW		 1397}
1398
3be9d62a 1399static int link_initialized(Link *link, sd_device *device) {
4f561e8e 1400 assert(link);
4f561e8e
TG		 1401 assert(device);
1402
8434fd5c 1403 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 1404 return 0;
1405
51517f9e 1406 if (link->sd_device)
679b3605
TG		 1407 return 0;
1408
79008bdd 1409 log_link_debug(link, "udev initialized link");
bd08ce56 1410 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 1411
51517f9e 1412 link->sd_device = sd_device_ref(device);
4f561e8e 1413
3c9b8860
TG		 1414 /* udev has initialized the link, but we don't know if we have yet
1415 * processed the NEWLINK messages with the latest state. Do a GETLINK,
1416 * when it returns we know that the pending NEWLINKs have already been
1417 * processed and that we are up-to-date */
4f561e8e 1418
5a1860f7 1419 return link_call_getlink(link, link_initialized_handler);
cc2d7efc
YW		 1420}
1421
0d411b7f 1422static int link_check_initialized(Link *link) {
51517f9e 1423 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
5a937ea2 1424 int r;
505f8da7 1425
0d411b7f 1426 assert(link);
505f8da7 1427
0d411b7f 1428 if (path_is_read_only_fs("/sys") > 0)
852a3916 1429 /* no udev */
0d411b7f 1430 return link_initialized_and_synced(link);
852a3916
YW		 1431
1432 /* udev should be around */
0ac655a6 1433 r = sd_device_new_from_ifindex(&device, link->ifindex);
852a3916
YW		 1434 if (r < 0) {
1435 log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m");
1436 return 0;
1437 }
1438
1439 r = sd_device_get_is_initialized(device);
0d411b7f
YW		 1440 if (r < 0)
1441 return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
852a3916
YW		 1442 if (r == 0) {
1443 /* not yet ready */
1444 log_link_debug(link, "link pending udev initialization...");
1445 return 0;
1446 }
1447
1448 r = device_is_renaming(device);
0d411b7f
YW		 1449 if (r < 0)
1450 return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
852a3916
YW		 1451 if (r > 0) {
1452 log_link_debug(link, "Interface is being renamed, pending initialization.");
1453 return 0;
4f561e8e 1454 }
505f8da7 1455
0d411b7f 1456 return link_initialized(link, device);
a748b692
TG		 1457}
1458
3be9d62a
YW		 1459int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) {
1460 sd_device_action_t action;
1461 Manager *m = userdata;
1462 Link *link = NULL;
1463 int r, ifindex;
1464
1465 assert(m);
1466 assert(device);
1467
1468 r = sd_device_get_action(device, &action);
1469 if (r < 0) {
1470 log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m");
1471 return 0;
1472 }
1473
1474 /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents
1475 * are "positive" events in some form, i.e. inform us about a changed or new network interface, that
1476 * still exists — and we are interested in that. */
1477 if (action == SD_DEVICE_REMOVE)
1478 return 0;
1479
1480 r = sd_device_get_ifindex(device, &ifindex);
1481 if (r < 0) {
1482 log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m",
1483 device_action_to_string(action));
1484 return 0;
1485 }
1486
1487 r = device_is_renaming(device);
1488 if (r < 0) {
4b9a8c2b 1489 log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m",
3be9d62a
YW		 1490 device_action_to_string(action));
1491 return 0;
1492 }
1493 if (r > 0) {
1494 log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed.");
1495 return 0;
1496 }
1497
6eab614d 1498 r = link_get_by_index(m, ifindex, &link);
3be9d62a 1499 if (r < 0) {
4b9a8c2b 1500 log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex);
3be9d62a
YW		 1501 return 0;
1502 }
1503
4b9a8c2b
YW		 1504 r = link_initialized(link, device);
1505 if (r < 0)
1506 link_enter_failed(link);
3be9d62a
YW		 1507
1508 return 0;
1509}
1510
9c0a72f9
TG		 1511static int link_carrier_gained(Link *link) {
1512 int r;
1513
1514 assert(link);
1515
aa9117c0
YW		 1516 r = link_handle_bound_by_list(link);
1517 if (r < 0)
1518 return r;
1519
600b7898
YW		 1520 if (link->iftype == ARPHRD_CAN)
1521 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0 1522 return 0;
600b7898 1523
b9ea3d2e 1524 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
8566df79 1525 r = link_acquire_dynamic_conf(link);
f0269653 1526 if (r < 0)
9c0a72f9 1527 return r;
6fc25497 1528
97108953 1529 r = link_request_static_configs(link);
6fc25497
SS		 1530 if (r < 0)
1531 return r;
9c0a72f9
TG		 1532 }
1533
aa9117c0 1534 return 0;
9c0a72f9
TG		 1535}
1536
1537static int link_carrier_lost(Link *link) {
1538 int r;
1539
1540 assert(link);
1541
aa9117c0
YW		 1542 r = link_handle_bound_by_list(link);
1543 if (r < 0)
1544 return r;
93b4dab5 1545
600b7898
YW		 1546 if (link->iftype == ARPHRD_CAN)
1547 /* let's shortcut things for CAN which doesn't need most of what's done below. */
aa9117c0
YW		 1548 return 0;
1549
1550 if (link->network && link->network->ignore_carrier_loss)
1551 return 0;
600b7898 1552
2a99eed0 1553 r = link_stop_engines(link, false);
9c0a72f9
TG		 1554 if (r < 0) {
1555 link_enter_failed(link);
1556 return r;
1557 }
1558
3104883d
SS		 1559 r = link_drop_config(link);
1560 if (r < 0)
1561 return r;
1562
2c7b826d 1563 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
942cf4b8 1564 log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state));
c436d553
MM		 1565 r = link_drop_foreign_config(link);
1566 if (r < 0)
1567 return r;
1568 }
3104883d 1569
aa9117c0 1570 return 0;
0c9ee5d5
YW		 1571}
1572
1573int link_carrier_reset(Link *link) {
1574 int r;
1575
1576 assert(link);
1577
852a3916
YW		 1578 if (!link_has_carrier(link))
1579 return 0;
0c9ee5d5 1580
852a3916
YW		 1581 r = link_carrier_lost(link);
1582 if (r < 0)
1583 return r;
0c9ee5d5 1584
852a3916
YW		 1585 r = link_carrier_gained(link);
1586 if (r < 0)
1587 return r;
0c9ee5d5 1588
852a3916 1589 log_link_info(link, "Reset carrier");
0c9ee5d5
YW		 1590 return 0;
1591}
1592
1593static int link_admin_state_up(Link *link) {
1594 int r;
1595
1596 assert(link);
1597
1598 /* This is called every time an interface admin state changes to up;
1599 * specifically, when IFF_UP flag changes from unset to set. */
1600
1601 if (!link->network)
1602 return 0;
1603
899b0e5e 1604 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) {
712fd5d2
YW		 1605 log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down.");
1606 return link_request_to_bring_up_or_down(link, /* up = */ false);
0c9ee5d5
YW		 1607 }
1608
1609 /* We set the ipv6 mtu after the device mtu, but the kernel resets
1610 * ipv6 mtu on NETDEV_UP, so we need to reset it. */
1611 r = link_set_ipv6_mtu(link);
1612 if (r < 0)
1613 log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m");
1614
1615 return 0;
1616}
1617
1618static int link_admin_state_down(Link *link) {
1619 assert(link);
1620
1621 if (!link->network)
1622 return 0;
1623
899b0e5e 1624 if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) {
712fd5d2
YW		 1625 log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up.");
1626 return link_request_to_bring_up_or_down(link, /* up = */ true);
0c9ee5d5
YW		 1627 }
1628
1629 return 0;
1630}
1631
1632bool link_has_carrier(Link *link) {
1633 /* see Documentation/networking/operstates.txt in the kernel sources */
1634
1635 if (link->kernel_operstate == IF_OPER_UP)
1636 return true;
1637
1638 if (link->kernel_operstate == IF_OPER_UNKNOWN)
1639 /* operstate may not be implemented, so fall back to flags */
1640 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1641 !FLAGS_SET(link->flags, IFF_DORMANT))
1642 return true;
1643
1644 return false;
1645}
1646
1647static bool link_is_enslaved(Link *link) {
1648 if (link->flags & IFF_SLAVE)
1649 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
1650 return true;
1651
1652 if (!link->network)
1653 return false;
1654
1655 if (link->master_ifindex > 0 && link->network->bridge)
1656 return true;
1657
1658 /* TODO: add conditions for other netdevs. */
1659
1660 return false;
1661}
1662
1663static LinkAddressState address_state_from_scope(uint8_t scope) {
1664 if (scope < RT_SCOPE_SITE)
1665 /* universally accessible addresses found */
1666 return LINK_ADDRESS_STATE_ROUTABLE;
1667
1668 if (scope < RT_SCOPE_HOST)
1669 /* only link or site local addresses found */
1670 return LINK_ADDRESS_STATE_DEGRADED;
1671
1672 /* no useful addresses found */
1673 return LINK_ADDRESS_STATE_OFF;
1674}
1675
1676void link_update_operstate(Link *link, bool also_update_master) {
1677 LinkOperationalState operstate;
1678 LinkCarrierState carrier_state;
1679 LinkAddressState ipv4_address_state, ipv6_address_state, address_state;
1680 LinkOnlineState online_state;
1681 _cleanup_strv_free_ char **p = NULL;
1682 uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE;
1683 bool changed = false;
1684 Address *address;
1685
1686 assert(link);
1687
1688 if (link->kernel_operstate == IF_OPER_DORMANT)
1689 carrier_state = LINK_CARRIER_STATE_DORMANT;
1690 else if (link_has_carrier(link)) {
1691 if (link_is_enslaved(link))
1692 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
1693 else
1694 carrier_state = LINK_CARRIER_STATE_CARRIER;
1695 } else if (link->flags & IFF_UP)
1696 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
1697 else
1698 carrier_state = LINK_CARRIER_STATE_OFF;
1699
1700 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
1701 Link *slave;
1702
1703 SET_FOREACH(slave, link->slaves) {
1704 link_update_operstate(slave, false);
1705
1706 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
1707 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
1708 }
1709 }
1710
1711 SET_FOREACH(address, link->addresses) {
1712 if (!address_is_ready(address))
1713 continue;
1714
1715 if (address->family == AF_INET)
1716 ipv4_scope = MIN(ipv4_scope, address->scope);
1717
1718 if (address->family == AF_INET6)
1719 ipv6_scope = MIN(ipv6_scope, address->scope);
1720 }
1721
1722 /* for operstate we also take foreign addresses into account */
1723 SET_FOREACH(address, link->addresses_foreign) {
1724 if (!address_is_ready(address))
1725 continue;
1726
1727 if (address->family == AF_INET)
1728 ipv4_scope = MIN(ipv4_scope, address->scope);
1729
1730 if (address->family == AF_INET6)
1731 ipv6_scope = MIN(ipv6_scope, address->scope);
1732 }
1733
1734 ipv4_address_state = address_state_from_scope(ipv4_scope);
1735 ipv6_address_state = address_state_from_scope(ipv6_scope);
1736 address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope));
1737
1738 /* Mapping of address and carrier state vs operational state
1739 * carrier state
1740 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1741 * ------------------------------------------------------------------------------
1742 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
1743 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
1744 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
1745 */
1746
1747 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
1748 operstate = (LinkOperationalState) carrier_state;
1749 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
1750 operstate = LINK_OPERSTATE_ROUTABLE;
1751 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
1752 operstate = LINK_OPERSTATE_DEGRADED;
1753 else
1754 operstate = LINK_OPERSTATE_ENSLAVED;
1755
1756 /* Only determine online state for managed links with RequiredForOnline=yes */
1757 if (!link->network || !link->network->required_for_online)
1758 online_state = _LINK_ONLINE_STATE_INVALID;
1759 else if (operstate < link->network->required_operstate_for_online.min ||
1760 operstate > link->network->required_operstate_for_online.max)
1761 online_state = LINK_ONLINE_STATE_OFFLINE;
1762 else {
1763 AddressFamily required_family = link->network->required_family_for_online;
1764 bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4;
1765 bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6;
1766
1767 /* The operational state is within the range required for online.
1768 * If a particular address family is also required, we might revert
1769 * to offline in the blocks below. */
1770 online_state = LINK_ONLINE_STATE_ONLINE;
1771
1772 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) {
1773 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED)
1774 online_state = LINK_ONLINE_STATE_OFFLINE;
1775 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED)
1776 online_state = LINK_ONLINE_STATE_OFFLINE;
1777 }
1778
1779 if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) {
1780 if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1781 online_state = LINK_ONLINE_STATE_OFFLINE;
1782 if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE)
1783 online_state = LINK_ONLINE_STATE_OFFLINE;
1784 }
1785 }
1786
1787 if (link->carrier_state != carrier_state) {
1788 link->carrier_state = carrier_state;
1789 changed = true;
1790 if (strv_extend(&p, "CarrierState") < 0)
1791 log_oom();
1792 }
1793
1794 if (link->address_state != address_state) {
1795 link->address_state = address_state;
1796 changed = true;
1797 if (strv_extend(&p, "AddressState") < 0)
1798 log_oom();
1799 }
0d4ad91d 1800
0c9ee5d5
YW		 1801 if (link->ipv4_address_state != ipv4_address_state) {
1802 link->ipv4_address_state = ipv4_address_state;
1803 changed = true;
1804 if (strv_extend(&p, "IPv4AddressState") < 0)
1805 log_oom();
1806 }
9c0a72f9 1807
0c9ee5d5
YW		 1808 if (link->ipv6_address_state != ipv6_address_state) {
1809 link->ipv6_address_state = ipv6_address_state;
1810 changed = true;
1811 if (strv_extend(&p, "IPv6AddressState") < 0)
1812 log_oom();
1813 }
9c0a72f9 1814
0c9ee5d5
YW		 1815 if (link->operstate != operstate) {
1816 link->operstate = operstate;
1817 changed = true;
1818 if (strv_extend(&p, "OperationalState") < 0)
1819 log_oom();
1820 }
9c0a72f9 1821
0c9ee5d5
YW		 1822 if (link->online_state != online_state) {
1823 link->online_state = online_state;
1824 changed = true;
1825 if (strv_extend(&p, "OnlineState") < 0)
1826 log_oom();
1827 }
9c0a72f9 1828
0c9ee5d5
YW		 1829 if (p)
1830 link_send_changed_strv(link, p);
1831 if (changed)
1832 link_dirty(link);
9c0a72f9 1833
0c9ee5d5
YW		 1834 if (also_update_master) {
1835 Link *master;
9c0a72f9 1836
0c9ee5d5
YW		 1837 if (link_get_master(link, &master) >= 0)
1838 link_update_operstate(master, true);
1839 }
9c0a72f9
TG		 1840}
1841
0c9ee5d5
YW		 1842#define FLAG_STRING(string, flag, old, new) \
1843 (((old ^ new) & flag) \
1844 ? ((old & flag) ? (" -" string) : (" +" string)) \
1845 : "")
1846
0d411b7f 1847static int link_update_flags(Link *link, sd_netlink_message *message) {
710fa1b3 1848 bool link_was_lower_up, link_was_admin_up, had_carrier;
0c9ee5d5
YW		 1849 uint8_t operstate;
1850 unsigned flags;
d236718c
DS		 1851 int r;
1852
61135582 1853 assert(link);
0d411b7f 1854 assert(message);
61135582 1855
0d411b7f 1856 r = sd_rtnl_message_link_get_flags(message, &flags);
0c9ee5d5 1857 if (r < 0)
0d411b7f 1858 return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m");
3be9d62a 1859
0d411b7f
YW		 1860 r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate);
1861 if (r == -ENODATA)
1862 /* If we got a message without operstate, assume the state was unchanged. */
0c9ee5d5 1863 operstate = link->kernel_operstate;
0d411b7f
YW		 1864 else if (r < 0)
1865 return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m");
0c9ee5d5 1866
0d411b7f 1867 if (link->flags == flags && link->kernel_operstate == operstate)
61135582
DS		 1868 return 0;
1869
0c9ee5d5
YW		 1870 if (link->flags != flags) {
1871 unsigned unknown_flags, unknown_flags_added, unknown_flags_removed;
61135582 1872
0c9ee5d5
YW		 1873 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",
1874 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
1875 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
1876 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
1877 FLAG_STRING("UP", IFF_UP, link->flags, flags),
1878 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
1879 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
1880 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
1881 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
1882 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
1883 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
1884 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
1885 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
1886 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
1887 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
1888 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
1889 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
1890 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
1891 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
1892 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
d236718c 1893
0c9ee5d5
YW		 1894 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
1895 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
1896 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
1897 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
1898 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
1899 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
1900 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
1901 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
d236718c 1902
0c9ee5d5
YW		 1903 if (unknown_flags_added)
1904 log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added);
61135582 1905
0c9ee5d5
YW		 1906 if (unknown_flags_removed)
1907 log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed);
1908 }
61135582 1909
710fa1b3 1910 link_was_lower_up = link->flags & IFF_LOWER_UP;
0d411b7f
YW		 1911 link_was_admin_up = link->flags & IFF_UP;
1912 had_carrier = link_has_carrier(link);
1913
0c9ee5d5
YW		 1914 link->flags = flags;
1915 link->kernel_operstate = operstate;
36161cba 1916
0c9ee5d5 1917 link_update_operstate(link, true);
61135582 1918
710fa1b3
YW		 1919 if (!link_was_lower_up && (link->flags & IFF_LOWER_UP)) {
1920 r = wifi_get_info(link);
1921 if (r < 0)
1922 return r;
1923 if (r > 0) {
1924 /* All link information is up-to-date. So, it is not necessary to call
1925 * RTM_GETLINK netlink method again. */
1926 r = link_reconfigure_impl(link, /* force = */ false);
1927 if (r < 0)
1928 return r;
1929 }
1930 }
1931
0d411b7f
YW		 1932 if (!link_was_admin_up && (link->flags & IFF_UP)) {
1933 log_link_info(link, "Link UP");
22936833 1934
0d411b7f
YW		 1935 r = link_admin_state_up(link);
1936 if (r < 0)
1937 return r;
1938 } else if (link_was_admin_up && !(link->flags & IFF_UP)) {
1939 log_link_info(link, "Link DOWN");
0d4ad91d 1940
0d411b7f 1941 r = link_admin_state_down(link);
0d4ad91d
AR		 1942 if (r < 0)
1943 return r;
7619683b
TG		 1944 }
1945
0d411b7f
YW		 1946 r = link_update_lldp(link);
1947 if (r < 0)
1948 return r;
b8941f74 1949
0d411b7f
YW		 1950 if (!had_carrier && link_has_carrier(link)) {
1951 log_link_info(link, "Gained carrier");
0d4ad91d 1952
0d411b7f 1953 r = link_carrier_gained(link);
30de2b89
YW		 1954 if (r < 0)
1955 return r;
0d411b7f
YW		 1956 } else if (had_carrier && !link_has_carrier(link)) {
1957 log_link_info(link, "Lost carrier");
1958
1959 r = link_carrier_lost(link);
0b54c870
YW		 1960 if (r < 0)
1961 return r;
b8941f74
TG		 1962 }
1963
0d411b7f
YW		 1964 return 0;
1965}
afe7fd56 1966
0d411b7f
YW		 1967static int link_update_master(Link *link, sd_netlink_message *message) {
1968 int master_ifindex, r;
7465dd22 1969
0d411b7f
YW		 1970 assert(link);
1971 assert(message);
69629de9 1972
0d411b7f
YW		 1973 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex);
1974 if (r == -ENODATA)
1975 return 0;
1976 if (r < 0)
1977 return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m");
807667f7 1978
0d411b7f
YW		 1979 if (master_ifindex == link->master_ifindex)
1980 return 0;
807667f7 1981
0d411b7f
YW		 1982 if (link->master_ifindex == 0)
1983 log_link_debug(link, "Joined to master interface: %i", master_ifindex);
1984 else if (master_ifindex == 0)
1985 log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex);
1986 else
1987 log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex);
807667f7 1988
0d411b7f 1989 link_drop_from_master(link);
807667f7 1990
0d411b7f 1991 link->master_ifindex = master_ifindex;
413708d1 1992
0d411b7f
YW		 1993 r = link_append_to_master(link);
1994 if (r < 0)
1995 return log_link_debug_errno(link, r, "Failed to append link to master: %m");
7465dd22 1996
0d411b7f
YW		 1997 return 0;
1998}
807667f7 1999
0d411b7f 2000static int link_update_hardware_address(Link *link, sd_netlink_message *message) {
fe321d45 2001 struct hw_addr_data old;
0d411b7f 2002 int r;
d93d655c 2003
0d411b7f
YW		 2004 assert(link);
2005 assert(message);
dfc58b47 2006
0d411b7f
YW		 2007 r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr);
2008 if (r < 0 && r != -ENODATA)
2009 return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m");
4f882b2a 2010
fe321d45
YW		 2011 old = link->hw_addr;
2012 r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr);
0d411b7f
YW		 2013 if (r == -ENODATA)
2014 return 0;
2015 if (r < 0)
fe321d45 2016 return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m");
bb262ef0 2017
fe321d45 2018 if (hw_addr_equal(&link->hw_addr, &old))
0d411b7f 2019 return 0;
a61bb41c 2020
fe321d45
YW		 2021 if (hw_addr_is_null(&old))
2022 log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&link->hw_addr));
2023 else {
2024 log_link_debug(link, "Hardware address is changed: %s → %s",
2025 HW_ADDR_TO_STR(&old), HW_ADDR_TO_STR(&link->hw_addr));
0d411b7f 2026
fe321d45
YW		 2027 if (hashmap_get(link->manager->links_by_hw_addr, &old) == link)
2028 hashmap_remove(link->manager->links_by_hw_addr, &old);
2029 }
2030
2031 if (!hw_addr_is_null(&link->hw_addr)) {
2032 r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link);
2033 if (r == -EEXIST && streq_ptr(link->kind, "bond"))
2034 /* bonding master and its slaves have the same hardware address. */
2035 r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link);
2036 if (r < 0)
2037 log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m");
2038 }
0d411b7f
YW		 2039
2040 r = ipv4ll_update_mac(link);
a61bb41c 2041 if (r < 0)
0d411b7f 2042 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
a61bb41c 2043
0d411b7f
YW		 2044 r = dhcp4_update_mac(link);
2045 if (r < 0)
2046 return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m");
d236718c 2047
0d411b7f
YW		 2048 r = dhcp6_update_mac(link);
2049 if (r < 0)
2050 return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
2051
2052 r = radv_update_mac(link);
2053 if (r < 0)
2054 return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m");
2055
2056 if (link->ndisc) {
ca2b7cd8 2057 r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether);
d236718c 2058 if (r < 0)
0d411b7f
YW		 2059 return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m");
2060 }
d236718c 2061
0d411b7f 2062 if (link->lldp) {
ca2b7cd8 2063 r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.ether);
61135582 2064 if (r < 0)
0d411b7f 2065 return log_link_debug_errno(link, r, "Could not update MAC address for LLDP: %m");
61135582
DS		 2066 }
2067
0d411b7f 2068 r = ipv4_dad_update_mac(link);
273eec24 2069 if (r < 0)
0d411b7f 2070 return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m");
273eec24 2071
0d411b7f
YW		 2072 return 0;
2073}
a61bb41c 2074
0d411b7f 2075static int link_update_mtu(Link *link, sd_netlink_message *message) {
717ba5fc 2076 uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX;
0d411b7f 2077 int r;
a61bb41c 2078
0d411b7f
YW		 2079 assert(link);
2080 assert(message);
2081
2082 r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu);
2083 if (r == -ENODATA)
2084 return 0;
2085 if (r < 0)
2086 return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m");
b5d0fd1e
YW		 2087 if (mtu == 0)
2088 return 0;
0d411b7f 2089
717ba5fc
YW		 2090 r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu);
2091 if (r < 0 && r != -ENODATA)
2092 return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m");
2093
2094 r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu);
2095 if (r < 0 && r != -ENODATA)
2096 return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m");
2097
717ba5fc
YW		 2098 if (max_mtu == 0)
2099 max_mtu = UINT32_MAX;
2100
2101 link->min_mtu = min_mtu;
2102 link->max_mtu = max_mtu;
2103
0d411b7f
YW		 2104 if (link->original_mtu == 0) {
2105 link->original_mtu = mtu;
717ba5fc
YW		 2106 log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2107 link->original_mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2108 }
2109
717ba5fc
YW		 2110 if (link->mtu == mtu)
2111 return 0;
2112
b5d0fd1e
YW		 2113 if (link->mtu != 0)
2114 log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")",
2115 link->mtu, mtu, link->min_mtu, link->max_mtu);
0d411b7f
YW		 2116
2117 link->mtu = mtu;
2118
2119 if (link->dhcp_client) {
2120 r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
9c0a72f9 2121 if (r < 0)
0d411b7f
YW		 2122 return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m");
2123 }
a61bb41c 2124
0d411b7f
YW		 2125 if (link->radv) {
2126 r = sd_radv_set_mtu(link->radv, link->mtu);
9c0a72f9 2127 if (r < 0)
0d411b7f 2128 return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m");
a61bb41c
TG		 2129 }
2130
2131 return 0;
dd3efc09 2132}
fe8db0c5 2133
0d411b7f
YW		 2134static int link_update_alternative_names(Link *link, sd_netlink_message *message) {
2135 _cleanup_strv_free_ char **altnames = NULL;
2136 char **n;
2137 int r;
2138
2139 assert(link);
2140 assert(message);
2141
2142 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames);
2143 if (r < 0 && r != -ENODATA)
2144 return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m");
2145
2146 STRV_FOREACH(n, link->alternative_names)
2147 hashmap_remove(link->manager->links_by_name, *n);
2148
2149 strv_free_and_replace(link->alternative_names, altnames);
2150
2151 STRV_FOREACH(n, link->alternative_names) {
2152 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link);
2153 if (r < 0)
2154 return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m");
2155 }
2156
2157 return 0;
2158}
2159
2160static int link_update_name(Link *link, sd_netlink_message *message) {
2161 const char *ifname;
2162 int r;
2163
2164 assert(link);
2165 assert(message);
2166
2167 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
2168 if (r == -ENODATA)
7802194a 2169 /* Hmm?? But ok. */
0d411b7f
YW		 2170 return 0;
2171 if (r < 0)
2172 return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m");
2173
2174 if (streq(ifname, link->ifname))
2175 return 0;
2176
2177 log_link_info(link, "Interface name change detected, renamed to %s.", ifname);
2178
2179 hashmap_remove(link->manager->links_by_name, link->ifname);
2180
2181 r = free_and_strdup(&link->ifname, ifname);
2182 if (r < 0)
2183 return log_oom_debug();
2184
2185 r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link);
2186 if (r < 0)
2187 return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m");
2188
2189 return 0;
2190}
2191
2192static int link_update(Link *link, sd_netlink_message *message) {
2193 int r;
2194
2195 assert(link);
2196 assert(message);
2197
2198 r = link_update_name(link, message);
2199 if (r < 0)
2200 return r;
2201
2202 r = link_update_alternative_names(link, message);
2203 if (r < 0)
2204 return r;
2205
2206 r = link_update_mtu(link, message);
2207 if (r < 0)
2208 return r;
2209
2210 r = link_update_hardware_address(link, message);
2211 if (r < 0)
2212 return r;
2213
2214 r = link_update_master(link, message);
2215 if (r < 0)
2216 return r;
2217
2218 return link_update_flags(link, message);
2219}
2220
0c9ee5d5
YW		 2221static Link *link_drop_or_unref(Link *link) {
2222 if (!link)
2223 return NULL;
2224 if (!link->manager)
2225 return link_unref(link);
2226 return link_drop(link);
2227}
2228
2229DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref);
2230
2231static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
0d411b7f 2232 _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL;
0c9ee5d5 2233 _cleanup_(link_drop_or_unrefp) Link *link = NULL;
0c9ee5d5
YW		 2234 unsigned short iftype;
2235 int r, ifindex;
0c9ee5d5
YW		 2236
2237 assert(manager);
2238 assert(message);
2239 assert(ret);
2240
0c9ee5d5
YW		 2241 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2242 if (r < 0)
0d411b7f 2243 return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m");
0c9ee5d5 2244 else if (ifindex <= 0)
0d411b7f 2245 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex.");
0c9ee5d5
YW		 2246
2247 r = sd_rtnl_message_link_get_type(message, &iftype);
2248 if (r < 0)
0d411b7f 2249 return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m");
0c9ee5d5
YW		 2250
2251 r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname);
2252 if (r < 0)
0d411b7f 2253 return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m");
0c9ee5d5
YW		 2254
2255 /* check for link kind */
2256 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
2257 if (r >= 0) {
0d411b7f
YW		 2258 r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind);
2259 if (r < 0 && r != -ENODATA)
2260 return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m");
0c9ee5d5
YW		 2261 r = sd_netlink_message_exit_container(message);
2262 if (r < 0)
0d411b7f 2263 return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m");
0c9ee5d5
YW		 2264 }
2265
0d411b7f
YW		 2266 if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0)
2267 return log_oom_debug();
2268
2269 if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0)
2270 return log_oom_debug();
2271
2272 if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0)
2273 return log_oom_debug();
2274
0c9ee5d5
YW		 2275 link = new(Link, 1);
2276 if (!link)
2277 return -ENOMEM;
2278
2279 *link = (Link) {
2280 .n_ref = 1,
2281 .state = LINK_STATE_PENDING,
2282 .online_state = _LINK_ONLINE_STATE_INVALID,
2283 .ifindex = ifindex,
2284 .iftype = iftype,
2285 .ifname = TAKE_PTR(ifname),
2286 .kind = TAKE_PTR(kind),
2287
0d411b7f
YW		 2288 .state_file = TAKE_PTR(state_file),
2289 .lease_file = TAKE_PTR(lease_file),
2290 .lldp_file = TAKE_PTR(lldp_file),
2291
0c9ee5d5
YW		 2292 .n_dns = UINT_MAX,
2293 .dns_default_route = -1,
2294 .llmnr = _RESOLVE_SUPPORT_INVALID,
2295 .mdns = _RESOLVE_SUPPORT_INVALID,
2296 .dnssec_mode = _DNSSEC_MODE_INVALID,
2297 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
2298 };
2299
6eab614d 2300 r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link);
0c9ee5d5 2301 if (r < 0)
0d411b7f 2302 return log_link_debug_errno(link, r, "Failed to store link into manager: %m");
0c9ee5d5
YW		 2303
2304 link->manager = manager;
2305
0d411b7f 2306 r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link);
0c9ee5d5 2307 if (r < 0)
0d411b7f 2308 return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m");
0c9ee5d5
YW		 2309
2310 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
2311 if (r < 0)
2312 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
2313
2314 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
2315 if (r < 0)
2316 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
2317
0d411b7f 2318 log_link_debug(link, "Link %d added", link->ifindex);
0c9ee5d5 2319 *ret = TAKE_PTR(link);
0c9ee5d5
YW		 2320 return 0;
2321}
2322
0d411b7f 2323int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) {
3be9d62a
YW		 2324 Link *link = NULL;
2325 NetDev *netdev = NULL;
2326 uint16_t type;
2327 const char *name;
2328 int r, ifindex;
2329
2330 assert(rtnl);
2331 assert(message);
0d411b7f 2332 assert(manager);
3be9d62a
YW		 2333
2334 if (sd_netlink_message_is_error(message)) {
2335 r = sd_netlink_message_get_errno(message);
2336 if (r < 0)
2337 log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring");
2338
2339 return 0;
2340 }
2341
2342 r = sd_netlink_message_get_type(message, &type);
2343 if (r < 0) {
2344 log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m");
2345 return 0;
2346 } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) {
2347 log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type);
2348 return 0;
2349 }
2350
2351 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
2352 if (r < 0) {
2353 log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m");
2354 return 0;
2355 } else if (ifindex <= 0) {
2356 log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex);
2357 return 0;
2358 }
2359
2360 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name);
2361 if (r < 0) {
2362 log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m");
2363 return 0;
2364 }
2365
6eab614d 2366 (void) link_get_by_index(manager, ifindex, &link);
0d411b7f 2367 (void) netdev_get(manager, name, &netdev);
3be9d62a
YW		 2368
2369 switch (type) {
2370 case RTM_NEWLINK:
0d411b7f
YW		 2371 if (netdev) {
2372 /* netdev exists, so make sure the ifindex matches */
2373 r = netdev_set_ifindex(netdev, message);
2374 if (r < 0) {
2375 log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m");
2376 return 0;
2377 }
2378 }
2379
3be9d62a
YW		 2380 if (!link) {
2381 /* link is new, so add it */
0d411b7f 2382 r = link_new(manager, message, &link);
3be9d62a 2383 if (r < 0) {
0d411b7f 2384 log_warning_errno(r, "Could not process new link message: %m");
3be9d62a
YW		 2385 return 0;
2386 }
3be9d62a 2387
0d411b7f 2388 r = link_update(link, message);
3be9d62a 2389 if (r < 0) {
0d411b7f
YW		 2390 log_warning_errno(r, "Could not process link message: %m");
2391 link_enter_failed(link);
3be9d62a
YW		 2392 return 0;
2393 }
3be9d62a 2394
0d411b7f
YW		 2395 r = link_check_initialized(link);
2396 if (r < 0) {
2397 log_warning_errno(r, "Failed to check link is initialized: %m");
2398 link_enter_failed(link);
2399 return 0;
2400 }
2401 } else {
2402 r = link_update(link, message);
2403 if (r < 0) {
2404 log_warning_errno(r, "Could not process link message: %m");
2405 link_enter_failed(link);
2406 return 0;
2407 }
3be9d62a
YW		 2408 }
2409
2410 break;
2411
2412 case RTM_DELLINK:
2413 link_drop(link);
2414 netdev_drop(netdev);
2415
2416 break;
2417
2418 default:
2419 assert_not_reached("Received link message with invalid RTNL message type.");
2420 }
2421
2422 return 1;
2423}
2424
79c6e114
YW		 2425int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) {
2426 uint16_t message_type;
2427 int r;
2428
2429 assert(m);
2430 assert(link);
2431 assert(error_msg);
2432
2433 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2434 return 0;
2435
2436 r = sd_netlink_message_get_errno(m);
2437 if (r < 0) {
2438 log_link_message_warning_errno(link, m, r, error_msg);
2439 link_enter_failed(link);
2440 return 0;
2441 }
2442
2443 r = sd_netlink_message_get_type(m, &message_type);
2444 if (r < 0) {
2445 log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m");
2446 return 0;
2447 }
2448 if (message_type != RTM_NEWLINK) {
2449 log_link_debug(link, "rtnl: received invalid link message type, ignoring.");
2450 return 0;
2451 }
2452
2453 r = link_update(link, m);
2454 if (r < 0) {
2455 link_enter_failed(link);
2456 return 0;
2457 }
2458
2459 return 1;
2460}
2461
2462int link_call_getlink(Link *link, link_netlink_message_handler_t callback) {
2463 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
2464 int r;
2465
2466 assert(link);
2467 assert(link->manager);
2468 assert(link->manager->rtnl);
2469 assert(callback);
2470
2471 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex);
2472 if (r < 0)
2473 return r;
2474
2475 r = netlink_call_async(link->manager->rtnl, NULL, req, callback,
2476 link_netlink_destroy_callback, link);
2477 if (r < 0)
2478 return r;
2479
2480 link_ref(link);
2481 return 0;
2482}
2483
fe8db0c5 2484static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 2485 [LINK_STATE_PENDING] = "pending",
bd08ce56 2486 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 2487 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 2488 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 2489 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 2490 [LINK_STATE_FAILED] = "failed",
370e9930 2491 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 2492};
2493
2494DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
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