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1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <netinet/in.h> | |
4 | #include <linux/if.h> | |
5 | #include <linux/if_arp.h> | |
6 | #include <linux/if_link.h> | |
7 | #include <unistd.h> | |
8 | ||
9 | #include "alloc-util.h" | |
10 | #include "bond.h" | |
11 | #include "bridge.h" | |
12 | #include "bus-util.h" | |
13 | #include "dhcp-identifier.h" | |
14 | #include "dhcp-lease-internal.h" | |
15 | #include "env-file.h" | |
16 | #include "ethtool-util.h" | |
17 | #include "fd-util.h" | |
18 | #include "fileio.h" | |
19 | #include "ipvlan.h" | |
20 | #include "missing_network.h" | |
21 | #include "netlink-util.h" | |
22 | #include "network-internal.h" | |
23 | #include "networkd-address-label.h" | |
24 | #include "networkd-address.h" | |
25 | #include "networkd-can.h" | |
26 | #include "networkd-dhcp-server.h" | |
27 | #include "networkd-dhcp4.h" | |
28 | #include "networkd-dhcp6.h" | |
29 | #include "networkd-fdb.h" | |
30 | #include "networkd-ipv4ll.h" | |
31 | #include "networkd-ipv6-proxy-ndp.h" | |
32 | #include "networkd-link-bus.h" | |
33 | #include "networkd-link.h" | |
34 | #include "networkd-lldp-tx.h" | |
35 | #include "networkd-manager.h" | |
36 | #include "networkd-mdb.h" | |
37 | #include "networkd-ndisc.h" | |
38 | #include "networkd-neighbor.h" | |
39 | #include "networkd-nexthop.h" | |
40 | #include "networkd-sriov.h" | |
41 | #include "networkd-sysctl.h" | |
42 | #include "networkd-radv.h" | |
43 | #include "networkd-routing-policy-rule.h" | |
44 | #include "networkd-wifi.h" | |
45 | #include "set.h" | |
46 | #include "socket-util.h" | |
47 | #include "stat-util.h" | |
48 | #include "stdio-util.h" | |
49 | #include "string-table.h" | |
50 | #include "strv.h" | |
51 | #include "sysctl-util.h" | |
52 | #include "tc.h" | |
53 | #include "tmpfile-util.h" | |
54 | #include "udev-util.h" | |
55 | #include "util.h" | |
56 | #include "vrf.h" | |
57 | ||
58 | bool link_ipv4ll_enabled(Link *link, AddressFamily mask) { | |
59 | assert(link); | |
60 | assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0); | |
61 | ||
62 | if (link->flags & IFF_LOOPBACK) | |
63 | return false; | |
64 | ||
65 | if (!link->network) | |
66 | return false; | |
67 | ||
68 | if (link->iftype == ARPHRD_CAN) | |
69 | return false; | |
70 | ||
71 | if (STRPTR_IN_SET(link->kind, | |
72 | "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti", | |
73 | "vti6", "nlmon", "xfrm", "bareudp")) | |
74 | return false; | |
75 | ||
76 | /* L3 or L3S mode do not support ARP. */ | |
77 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
78 | return false; | |
79 | ||
80 | if (link->network->bond) | |
81 | return false; | |
82 | ||
83 | return link->network->link_local & mask; | |
84 | } | |
85 | ||
86 | bool link_ipv6ll_enabled(Link *link) { | |
87 | assert(link); | |
88 | ||
89 | if (!socket_ipv6_is_supported()) | |
90 | return false; | |
91 | ||
92 | if (link->flags & IFF_LOOPBACK) | |
93 | return false; | |
94 | ||
95 | if (!link->network) | |
96 | return false; | |
97 | ||
98 | if (link->iftype == ARPHRD_CAN) | |
99 | return false; | |
100 | ||
101 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) | |
102 | return false; | |
103 | ||
104 | if (link->network->bond) | |
105 | return false; | |
106 | ||
107 | return link->network->link_local & ADDRESS_FAMILY_IPV6; | |
108 | } | |
109 | ||
110 | bool link_ipv6_enabled(Link *link) { | |
111 | assert(link); | |
112 | ||
113 | if (!socket_ipv6_is_supported()) | |
114 | return false; | |
115 | ||
116 | if (link->network->bond) | |
117 | return false; | |
118 | ||
119 | if (link->iftype == ARPHRD_CAN) | |
120 | return false; | |
121 | ||
122 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ | |
123 | if (link_ipv6ll_enabled(link)) | |
124 | return true; | |
125 | ||
126 | if (network_has_static_ipv6_configurations(link->network)) | |
127 | return true; | |
128 | ||
129 | return false; | |
130 | } | |
131 | ||
132 | static bool link_is_enslaved(Link *link) { | |
133 | if (link->flags & IFF_SLAVE) | |
134 | /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ | |
135 | return true; | |
136 | ||
137 | if (!link->network) | |
138 | return false; | |
139 | ||
140 | if (link->master_ifindex > 0 && link->network->bridge) | |
141 | return true; | |
142 | ||
143 | /* TODO: add conditions for other netdevs. */ | |
144 | ||
145 | return false; | |
146 | } | |
147 | ||
148 | static void link_update_master_operstate(Link *link, NetDev *netdev) { | |
149 | Link *master; | |
150 | ||
151 | if (!netdev) | |
152 | return; | |
153 | ||
154 | if (netdev->ifindex <= 0) | |
155 | return; | |
156 | ||
157 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
158 | return; | |
159 | ||
160 | link_update_operstate(master, true); | |
161 | } | |
162 | ||
163 | void link_update_operstate(Link *link, bool also_update_master) { | |
164 | LinkOperationalState operstate; | |
165 | LinkCarrierState carrier_state; | |
166 | LinkAddressState address_state; | |
167 | _cleanup_strv_free_ char **p = NULL; | |
168 | uint8_t scope = RT_SCOPE_NOWHERE; | |
169 | bool changed = false; | |
170 | Address *address; | |
171 | ||
172 | assert(link); | |
173 | ||
174 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
175 | carrier_state = LINK_CARRIER_STATE_DORMANT; | |
176 | else if (link_has_carrier(link)) { | |
177 | if (link_is_enslaved(link)) | |
178 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
179 | else | |
180 | carrier_state = LINK_CARRIER_STATE_CARRIER; | |
181 | } else if (link->flags & IFF_UP) | |
182 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; | |
183 | else | |
184 | carrier_state = LINK_CARRIER_STATE_OFF; | |
185 | ||
186 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { | |
187 | Link *slave; | |
188 | ||
189 | SET_FOREACH(slave, link->slaves) { | |
190 | link_update_operstate(slave, false); | |
191 | ||
192 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) | |
193 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
194 | } | |
195 | } | |
196 | ||
197 | SET_FOREACH(address, link->addresses) { | |
198 | if (!address_is_ready(address)) | |
199 | continue; | |
200 | ||
201 | if (address->scope < scope) | |
202 | scope = address->scope; | |
203 | } | |
204 | ||
205 | /* for operstate we also take foreign addresses into account */ | |
206 | SET_FOREACH(address, link->addresses_foreign) { | |
207 | if (!address_is_ready(address)) | |
208 | continue; | |
209 | ||
210 | if (address->scope < scope) | |
211 | scope = address->scope; | |
212 | } | |
213 | ||
214 | if (scope < RT_SCOPE_SITE) | |
215 | /* universally accessible addresses found */ | |
216 | address_state = LINK_ADDRESS_STATE_ROUTABLE; | |
217 | else if (scope < RT_SCOPE_HOST) | |
218 | /* only link or site local addresses found */ | |
219 | address_state = LINK_ADDRESS_STATE_DEGRADED; | |
220 | else | |
221 | /* no useful addresses found */ | |
222 | address_state = LINK_ADDRESS_STATE_OFF; | |
223 | ||
224 | /* Mapping of address and carrier state vs operational state | |
225 | * carrier state | |
226 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
227 | * ------------------------------------------------------------------------------ | |
228 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
229 | * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved | |
230 | * routable | off | no-carrier | dormant | degraded-carrier | routable | routable | |
231 | */ | |
232 | ||
233 | if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) | |
234 | operstate = (LinkOperationalState) carrier_state; | |
235 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
236 | operstate = LINK_OPERSTATE_ROUTABLE; | |
237 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
238 | operstate = LINK_OPERSTATE_DEGRADED; | |
239 | else | |
240 | operstate = LINK_OPERSTATE_ENSLAVED; | |
241 | ||
242 | if (link->carrier_state != carrier_state) { | |
243 | link->carrier_state = carrier_state; | |
244 | changed = true; | |
245 | if (strv_extend(&p, "CarrierState") < 0) | |
246 | log_oom(); | |
247 | } | |
248 | ||
249 | if (link->address_state != address_state) { | |
250 | link->address_state = address_state; | |
251 | changed = true; | |
252 | if (strv_extend(&p, "AddressState") < 0) | |
253 | log_oom(); | |
254 | } | |
255 | ||
256 | if (link->operstate != operstate) { | |
257 | link->operstate = operstate; | |
258 | changed = true; | |
259 | if (strv_extend(&p, "OperationalState") < 0) | |
260 | log_oom(); | |
261 | } | |
262 | ||
263 | if (p) | |
264 | link_send_changed_strv(link, p); | |
265 | if (changed) | |
266 | link_dirty(link); | |
267 | ||
268 | if (also_update_master && link->network) { | |
269 | link_update_master_operstate(link, link->network->bond); | |
270 | link_update_master_operstate(link, link->network->bridge); | |
271 | } | |
272 | } | |
273 | ||
274 | #define FLAG_STRING(string, flag, old, new) \ | |
275 | (((old ^ new) & flag) \ | |
276 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
277 | : "") | |
278 | ||
279 | static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) { | |
280 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; | |
281 | uint8_t operstate; | |
282 | int r; | |
283 | ||
284 | assert(link); | |
285 | ||
286 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
287 | if (r < 0) | |
288 | return log_link_warning_errno(link, r, "Could not get link flags: %m"); | |
289 | ||
290 | r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); | |
291 | if (r < 0) | |
292 | /* if we got a message without operstate, take it to mean | |
293 | the state was unchanged */ | |
294 | operstate = link->kernel_operstate; | |
295 | ||
296 | if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate)) | |
297 | return 0; | |
298 | ||
299 | if (link->flags != flags) { | |
300 | 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", | |
301 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
302 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
303 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
304 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
305 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
306 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
307 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
308 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
309 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
310 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
311 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
312 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
313 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
314 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
315 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
316 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
317 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
318 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
319 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
320 | ||
321 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
322 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
323 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
324 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
325 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
326 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
327 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
328 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
329 | ||
330 | /* link flags are currently at most 18 bits, let's align to | |
331 | * printing 20 */ | |
332 | if (unknown_flags_added) | |
333 | log_link_debug(link, | |
334 | "Unknown link flags gained: %#.5x (ignoring)", | |
335 | unknown_flags_added); | |
336 | ||
337 | if (unknown_flags_removed) | |
338 | log_link_debug(link, | |
339 | "Unknown link flags lost: %#.5x (ignoring)", | |
340 | unknown_flags_removed); | |
341 | } | |
342 | ||
343 | link->flags = flags; | |
344 | link->kernel_operstate = operstate; | |
345 | ||
346 | link_update_operstate(link, true); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
352 | _cleanup_(link_unrefp) Link *link = NULL; | |
353 | const char *ifname, *kind = NULL; | |
354 | unsigned short iftype; | |
355 | int r, ifindex; | |
356 | uint16_t type; | |
357 | ||
358 | assert(manager); | |
359 | assert(message); | |
360 | assert(ret); | |
361 | ||
362 | /* check for link kind */ | |
363 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
364 | if (r == 0) { | |
365 | (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind); | |
366 | r = sd_netlink_message_exit_container(message); | |
367 | if (r < 0) | |
368 | return r; | |
369 | } | |
370 | ||
371 | r = sd_netlink_message_get_type(message, &type); | |
372 | if (r < 0) | |
373 | return r; | |
374 | else if (type != RTM_NEWLINK) | |
375 | return -EINVAL; | |
376 | ||
377 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
378 | if (r < 0) | |
379 | return r; | |
380 | else if (ifindex <= 0) | |
381 | return -EINVAL; | |
382 | ||
383 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
384 | if (r < 0) | |
385 | return r; | |
386 | ||
387 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
388 | if (r < 0) | |
389 | return r; | |
390 | ||
391 | link = new(Link, 1); | |
392 | if (!link) | |
393 | return -ENOMEM; | |
394 | ||
395 | *link = (Link) { | |
396 | .n_ref = 1, | |
397 | .manager = manager, | |
398 | .state = LINK_STATE_PENDING, | |
399 | .ifindex = ifindex, | |
400 | .iftype = iftype, | |
401 | ||
402 | .n_dns = (unsigned) -1, | |
403 | .dns_default_route = -1, | |
404 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
405 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
406 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
407 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
408 | }; | |
409 | ||
410 | link->ifname = strdup(ifname); | |
411 | if (!link->ifname) | |
412 | return -ENOMEM; | |
413 | ||
414 | if (kind) { | |
415 | link->kind = strdup(kind); | |
416 | if (!link->kind) | |
417 | return -ENOMEM; | |
418 | } | |
419 | ||
420 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex); | |
421 | if (r < 0) | |
422 | log_link_debug_errno(link, r, "New device has no master, continuing without"); | |
423 | ||
424 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr); | |
425 | if (r < 0) | |
426 | log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without"); | |
427 | ||
428 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); | |
429 | if (r < 0) | |
430 | log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without"); | |
431 | ||
432 | r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac); | |
433 | if (r < 0) | |
434 | log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m"); | |
435 | ||
436 | r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver); | |
437 | if (r < 0) | |
438 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
439 | ||
440 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names); | |
441 | if (r < 0 && r != -ENODATA) | |
442 | return r; | |
443 | ||
444 | if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) | |
445 | return -ENOMEM; | |
446 | ||
447 | if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) | |
448 | return -ENOMEM; | |
449 | ||
450 | if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) | |
451 | return -ENOMEM; | |
452 | ||
453 | r = hashmap_ensure_allocated(&manager->links, NULL); | |
454 | if (r < 0) | |
455 | return r; | |
456 | ||
457 | r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link); | |
458 | if (r < 0) | |
459 | return r; | |
460 | ||
461 | r = link_update_flags(link, message, false); | |
462 | if (r < 0) | |
463 | return r; | |
464 | ||
465 | *ret = TAKE_PTR(link); | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | void link_ntp_settings_clear(Link *link) { | |
471 | link->ntp = strv_free(link->ntp); | |
472 | } | |
473 | ||
474 | void link_dns_settings_clear(Link *link) { | |
475 | if (link->n_dns != (unsigned) -1) | |
476 | for (unsigned i = 0; i < link->n_dns; i++) | |
477 | in_addr_full_free(link->dns[i]); | |
478 | link->dns = mfree(link->dns); | |
479 | link->n_dns = (unsigned) -1; | |
480 | ||
481 | link->search_domains = ordered_set_free_free(link->search_domains); | |
482 | link->route_domains = ordered_set_free_free(link->route_domains); | |
483 | ||
484 | link->dns_default_route = -1; | |
485 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
486 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
487 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
488 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
489 | ||
490 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
491 | } | |
492 | ||
493 | static void link_free_engines(Link *link) { | |
494 | if (!link) | |
495 | return; | |
496 | ||
497 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
498 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); | |
499 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
500 | link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd); | |
501 | ||
502 | link->lldp = sd_lldp_unref(link->lldp); | |
503 | link_lldp_emit_stop(link); | |
504 | ||
505 | ndisc_flush(link); | |
506 | ||
507 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); | |
508 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
509 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); | |
510 | link->ndisc = sd_ndisc_unref(link->ndisc); | |
511 | link->radv = sd_radv_unref(link->radv); | |
512 | ||
513 | ipv4_dad_unref(link); | |
514 | } | |
515 | ||
516 | static Link *link_free(Link *link) { | |
517 | assert(link); | |
518 | ||
519 | link_ntp_settings_clear(link); | |
520 | link_dns_settings_clear(link); | |
521 | ||
522 | link->routes = set_free(link->routes); | |
523 | link->routes_foreign = set_free(link->routes_foreign); | |
524 | link->dhcp_routes = set_free(link->dhcp_routes); | |
525 | link->dhcp_routes_old = set_free(link->dhcp_routes_old); | |
526 | link->dhcp6_routes = set_free(link->dhcp6_routes); | |
527 | link->dhcp6_routes_old = set_free(link->dhcp6_routes_old); | |
528 | link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes); | |
529 | link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old); | |
530 | link->ndisc_routes = set_free(link->ndisc_routes); | |
531 | ||
532 | link->nexthops = set_free(link->nexthops); | |
533 | link->nexthops_foreign = set_free(link->nexthops_foreign); | |
534 | ||
535 | link->neighbors = set_free(link->neighbors); | |
536 | link->neighbors_foreign = set_free(link->neighbors_foreign); | |
537 | ||
538 | link->addresses = set_free(link->addresses); | |
539 | link->addresses_foreign = set_free(link->addresses_foreign); | |
540 | link->pool_addresses = set_free(link->pool_addresses); | |
541 | link->static_addresses = set_free(link->static_addresses); | |
542 | link->dhcp6_addresses = set_free(link->dhcp6_addresses); | |
543 | link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old); | |
544 | link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses); | |
545 | link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old); | |
546 | link->ndisc_addresses = set_free(link->ndisc_addresses); | |
547 | ||
548 | link_free_engines(link); | |
549 | free(link->lease_file); | |
550 | free(link->lldp_file); | |
551 | ||
552 | free(link->ifname); | |
553 | strv_free(link->alternative_names); | |
554 | free(link->kind); | |
555 | free(link->ssid); | |
556 | free(link->driver); | |
557 | ||
558 | (void) unlink(link->state_file); | |
559 | free(link->state_file); | |
560 | ||
561 | sd_device_unref(link->sd_device); | |
562 | ||
563 | hashmap_free(link->bound_to_links); | |
564 | hashmap_free(link->bound_by_links); | |
565 | ||
566 | set_free_with_destructor(link->slaves, link_unref); | |
567 | ||
568 | network_unref(link->network); | |
569 | ||
570 | return mfree(link); | |
571 | } | |
572 | ||
573 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); | |
574 | ||
575 | int link_get(Manager *m, int ifindex, Link **ret) { | |
576 | Link *link; | |
577 | ||
578 | assert(m); | |
579 | assert(ifindex > 0); | |
580 | assert(ret); | |
581 | ||
582 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); | |
583 | if (!link) | |
584 | return -ENODEV; | |
585 | ||
586 | *ret = link; | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | void link_set_state(Link *link, LinkState state) { | |
592 | assert(link); | |
593 | ||
594 | if (link->state == state) | |
595 | return; | |
596 | ||
597 | log_link_debug(link, "State changed: %s -> %s", | |
598 | link_state_to_string(link->state), | |
599 | link_state_to_string(state)); | |
600 | ||
601 | link->state = state; | |
602 | ||
603 | link_send_changed(link, "AdministrativeState", NULL); | |
604 | } | |
605 | ||
606 | static void link_enter_unmanaged(Link *link) { | |
607 | assert(link); | |
608 | ||
609 | link_set_state(link, LINK_STATE_UNMANAGED); | |
610 | ||
611 | link_dirty(link); | |
612 | } | |
613 | ||
614 | int link_stop_engines(Link *link, bool may_keep_dhcp) { | |
615 | int r = 0, k; | |
616 | ||
617 | assert(link); | |
618 | assert(link->manager); | |
619 | assert(link->manager->event); | |
620 | ||
621 | bool keep_dhcp = may_keep_dhcp && | |
622 | link->network && | |
623 | (link->manager->restarting || | |
624 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
625 | ||
626 | if (!keep_dhcp) { | |
627 | k = sd_dhcp_client_stop(link->dhcp_client); | |
628 | if (k < 0) | |
629 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); | |
630 | } | |
631 | ||
632 | k = sd_ipv4acd_stop(link->dhcp_acd); | |
633 | if (k < 0) | |
634 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m"); | |
635 | ||
636 | k = sd_dhcp_server_stop(link->dhcp_server); | |
637 | if (k < 0) | |
638 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); | |
639 | ||
640 | k = sd_lldp_stop(link->lldp); | |
641 | if (k < 0) | |
642 | r = log_link_warning_errno(link, k, "Could not stop LLDP: %m"); | |
643 | ||
644 | k = sd_ipv4ll_stop(link->ipv4ll); | |
645 | if (k < 0) | |
646 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
647 | ||
648 | k = ipv4_dad_stop(link); | |
649 | if (k < 0) | |
650 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); | |
651 | ||
652 | k = sd_dhcp6_client_stop(link->dhcp6_client); | |
653 | if (k < 0) | |
654 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
655 | ||
656 | k = dhcp6_pd_remove(link); | |
657 | if (k < 0) | |
658 | r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); | |
659 | ||
660 | k = sd_ndisc_stop(link->ndisc); | |
661 | if (k < 0) | |
662 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
663 | ||
664 | k = sd_radv_stop(link->radv); | |
665 | if (k < 0) | |
666 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
667 | ||
668 | link_lldp_emit_stop(link); | |
669 | return r; | |
670 | } | |
671 | ||
672 | void link_enter_failed(Link *link) { | |
673 | assert(link); | |
674 | ||
675 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
676 | return; | |
677 | ||
678 | log_link_warning(link, "Failed"); | |
679 | ||
680 | link_set_state(link, LINK_STATE_FAILED); | |
681 | ||
682 | (void) link_stop_engines(link, false); | |
683 | ||
684 | link_dirty(link); | |
685 | } | |
686 | ||
687 | static int link_join_netdevs_after_configured(Link *link) { | |
688 | NetDev *netdev; | |
689 | int r; | |
690 | ||
691 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { | |
692 | if (netdev->ifindex > 0) | |
693 | /* Assume already enslaved. */ | |
694 | continue; | |
695 | ||
696 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED) | |
697 | continue; | |
698 | ||
699 | log_struct(LOG_DEBUG, | |
700 | LOG_LINK_INTERFACE(link), | |
701 | LOG_NETDEV_INTERFACE(netdev), | |
702 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
703 | ||
704 | r = netdev_join(netdev, link, NULL); | |
705 | if (r < 0) | |
706 | return log_struct_errno(LOG_WARNING, r, | |
707 | LOG_LINK_INTERFACE(link), | |
708 | LOG_NETDEV_INTERFACE(netdev), | |
709 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
710 | } | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
715 | static void link_enter_configured(Link *link) { | |
716 | assert(link); | |
717 | assert(link->network); | |
718 | ||
719 | if (link->state != LINK_STATE_CONFIGURING) | |
720 | return; | |
721 | ||
722 | link_set_state(link, LINK_STATE_CONFIGURED); | |
723 | ||
724 | (void) link_join_netdevs_after_configured(link); | |
725 | ||
726 | link_dirty(link); | |
727 | } | |
728 | ||
729 | void link_check_ready(Link *link) { | |
730 | Address *a; | |
731 | ||
732 | assert(link); | |
733 | ||
734 | if (link->state == LINK_STATE_CONFIGURED) | |
735 | return; | |
736 | ||
737 | if (link->state != LINK_STATE_CONFIGURING) { | |
738 | log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
739 | return; | |
740 | } | |
741 | ||
742 | if (!link->network) | |
743 | return; | |
744 | ||
745 | if (!link->addresses_configured) { | |
746 | log_link_debug(link, "%s(): static addresses are not configured.", __func__); | |
747 | return; | |
748 | } | |
749 | ||
750 | if (!link->neighbors_configured) { | |
751 | log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
752 | return; | |
753 | } | |
754 | ||
755 | SET_FOREACH(a, link->addresses) | |
756 | if (!address_is_ready(a)) { | |
757 | _cleanup_free_ char *str = NULL; | |
758 | ||
759 | (void) in_addr_to_string(a->family, &a->in_addr, &str); | |
760 | log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen); | |
761 | return; | |
762 | } | |
763 | ||
764 | if (!link->static_routes_configured) { | |
765 | log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
766 | return; | |
767 | } | |
768 | ||
769 | if (!link->static_nexthops_configured) { | |
770 | log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
771 | return; | |
772 | } | |
773 | ||
774 | if (!link->routing_policy_rules_configured) { | |
775 | log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); | |
776 | return; | |
777 | } | |
778 | ||
779 | if (!link->tc_configured) { | |
780 | log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
781 | return; | |
782 | } | |
783 | ||
784 | if (!link->sr_iov_configured) { | |
785 | log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
786 | return; | |
787 | } | |
788 | ||
789 | if (!link->bridge_mdb_configured) { | |
790 | log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__); | |
791 | return; | |
792 | } | |
793 | ||
794 | if (link_has_carrier(link) || !link->network->configure_without_carrier) { | |
795 | bool has_ndisc_address = false; | |
796 | NDiscAddress *n; | |
797 | ||
798 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) { | |
799 | log_link_debug(link, "%s(): IPv4LL is not configured.", __func__); | |
800 | return; | |
801 | } | |
802 | ||
803 | if (link_ipv6ll_enabled(link) && | |
804 | in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) { | |
805 | log_link_debug(link, "%s(): IPv6LL is not configured.", __func__); | |
806 | return; | |
807 | } | |
808 | ||
809 | SET_FOREACH(n, link->ndisc_addresses) | |
810 | if (!n->marked) { | |
811 | has_ndisc_address = true; | |
812 | break; | |
813 | } | |
814 | ||
815 | if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) && | |
816 | !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address && | |
817 | !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) { | |
818 | log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__); | |
819 | return; | |
820 | } | |
821 | ||
822 | if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) { | |
823 | if (!link->dhcp4_configured && | |
824 | !(link->dhcp6_address_configured && link->dhcp6_route_configured) && | |
825 | !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) && | |
826 | !(link->ndisc_addresses_configured && link->ndisc_routes_configured) && | |
827 | !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) { | |
828 | /* When DHCP or RA is enabled, at least one protocol must provide an address, or | |
829 | * an IPv4ll fallback address must be configured. */ | |
830 | log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); | |
831 | return; | |
832 | } | |
833 | ||
834 | log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s", | |
835 | __func__, | |
836 | yes_no(link->dhcp4_configured), | |
837 | yes_no(link->dhcp6_address_configured), | |
838 | yes_no(link->dhcp6_route_configured), | |
839 | yes_no(link->dhcp6_pd_address_configured), | |
840 | yes_no(link->dhcp6_pd_route_configured), | |
841 | yes_no(link->ndisc_addresses_configured), | |
842 | yes_no(link->ndisc_routes_configured)); | |
843 | } | |
844 | } | |
845 | ||
846 | link_enter_configured(link); | |
847 | ||
848 | return; | |
849 | } | |
850 | ||
851 | static int link_set_static_configs(Link *link) { | |
852 | int r; | |
853 | ||
854 | assert(link); | |
855 | assert(link->network); | |
856 | assert(link->state != _LINK_STATE_INVALID); | |
857 | ||
858 | /* Reset all *_configured flags we are configuring. */ | |
859 | link->request_static_addresses = false; | |
860 | link->addresses_configured = false; | |
861 | link->addresses_ready = false; | |
862 | link->neighbors_configured = false; | |
863 | link->static_routes_configured = false; | |
864 | link->static_nexthops_configured = false; | |
865 | link->routing_policy_rules_configured = false; | |
866 | ||
867 | r = link_set_bridge_fdb(link); | |
868 | if (r < 0) | |
869 | return r; | |
870 | ||
871 | r = link_set_bridge_mdb(link); | |
872 | if (r < 0) | |
873 | return r; | |
874 | ||
875 | r = link_set_neighbors(link); | |
876 | if (r < 0) | |
877 | return r; | |
878 | ||
879 | r = link_set_addresses(link); | |
880 | if (r < 0) | |
881 | return r; | |
882 | ||
883 | r = link_set_address_labels(link); | |
884 | if (r < 0) | |
885 | return r; | |
886 | ||
887 | /* now that we can figure out a default address for the dhcp server, start it */ | |
888 | r = dhcp4_server_configure(link); | |
889 | if (r < 0) | |
890 | return r; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int link_configure_continue(Link *link); | |
896 | ||
897 | static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
898 | int r; | |
899 | ||
900 | assert(link); | |
901 | ||
902 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
903 | return 1; | |
904 | ||
905 | r = sd_netlink_message_get_errno(m); | |
906 | if (r < 0) | |
907 | log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring"); | |
908 | else | |
909 | log_link_debug(link, "Setting MAC address done."); | |
910 | ||
911 | return 1; | |
912 | } | |
913 | ||
914 | static int link_set_mac(Link *link) { | |
915 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
916 | int r; | |
917 | ||
918 | assert(link); | |
919 | assert(link->network); | |
920 | assert(link->manager); | |
921 | assert(link->manager->rtnl); | |
922 | ||
923 | if (!link->network->mac) | |
924 | return 0; | |
925 | ||
926 | log_link_debug(link, "Setting MAC address"); | |
927 | ||
928 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
929 | if (r < 0) | |
930 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
931 | ||
932 | r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); | |
933 | if (r < 0) | |
934 | return log_link_error_errno(link, r, "Could not set MAC address: %m"); | |
935 | ||
936 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler, | |
937 | link_netlink_destroy_callback, link); | |
938 | if (r < 0) | |
939 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
940 | ||
941 | link_ref(link); | |
942 | ||
943 | return 0; | |
944 | } | |
945 | ||
946 | static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
947 | int r; | |
948 | ||
949 | assert(link); | |
950 | ||
951 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
952 | return 1; | |
953 | ||
954 | r = sd_netlink_message_get_errno(m); | |
955 | if (r < 0) | |
956 | log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring"); | |
957 | else | |
958 | log_link_debug(link, "Setting nomaster done."); | |
959 | ||
960 | return 1; | |
961 | } | |
962 | ||
963 | static int link_set_nomaster(Link *link) { | |
964 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
965 | int r; | |
966 | ||
967 | assert(link); | |
968 | assert(link->network); | |
969 | assert(link->manager); | |
970 | assert(link->manager->rtnl); | |
971 | ||
972 | /* set it free if not enslaved with networkd */ | |
973 | if (link->network->bridge || link->network->bond || link->network->vrf) | |
974 | return 0; | |
975 | ||
976 | log_link_debug(link, "Setting nomaster"); | |
977 | ||
978 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
979 | if (r < 0) | |
980 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
981 | ||
982 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); | |
983 | if (r < 0) | |
984 | return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); | |
985 | ||
986 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler, | |
987 | link_netlink_destroy_callback, link); | |
988 | if (r < 0) | |
989 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
990 | ||
991 | link_ref(link); | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
996 | static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
997 | int r; | |
998 | ||
999 | assert(m); | |
1000 | assert(link); | |
1001 | assert(link->ifname); | |
1002 | ||
1003 | link->setting_mtu = false; | |
1004 | ||
1005 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1006 | return 1; | |
1007 | ||
1008 | r = sd_netlink_message_get_errno(m); | |
1009 | if (r < 0) | |
1010 | log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring"); | |
1011 | else | |
1012 | log_link_debug(link, "Setting MTU done."); | |
1013 | ||
1014 | if (link->state == LINK_STATE_INITIALIZED) { | |
1015 | r = link_configure_continue(link); | |
1016 | if (r < 0) | |
1017 | link_enter_failed(link); | |
1018 | } | |
1019 | ||
1020 | return 1; | |
1021 | } | |
1022 | ||
1023 | int link_set_mtu(Link *link, uint32_t mtu) { | |
1024 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1025 | int r; | |
1026 | ||
1027 | assert(link); | |
1028 | assert(link->manager); | |
1029 | assert(link->manager->rtnl); | |
1030 | ||
1031 | if (mtu == 0 || link->setting_mtu) | |
1032 | return 0; | |
1033 | ||
1034 | if (link->mtu == mtu) | |
1035 | return 0; | |
1036 | ||
1037 | log_link_debug(link, "Setting MTU: %" PRIu32, mtu); | |
1038 | ||
1039 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1040 | if (r < 0) | |
1041 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1042 | ||
1043 | /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes | |
1044 | * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ | |
1045 | if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) { | |
1046 | ||
1047 | log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " | |
1048 | "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes"); | |
1049 | ||
1050 | mtu = IPV6_MIN_MTU; | |
1051 | } | |
1052 | ||
1053 | r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); | |
1054 | if (r < 0) | |
1055 | return log_link_error_errno(link, r, "Could not append MTU: %m"); | |
1056 | ||
1057 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler, | |
1058 | link_netlink_destroy_callback, link); | |
1059 | if (r < 0) | |
1060 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1061 | ||
1062 | link_ref(link); | |
1063 | link->setting_mtu = true; | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | static bool link_reduces_vlan_mtu(Link *link) { | |
1069 | /* See netif_reduces_vlan_mtu() in kernel. */ | |
1070 | return streq_ptr(link->kind, "macsec"); | |
1071 | } | |
1072 | ||
1073 | static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { | |
1074 | uint32_t mtu = 0; | |
1075 | NetDev *dev; | |
1076 | ||
1077 | HASHMAP_FOREACH(dev, link->network->stacked_netdevs) | |
1078 | if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) | |
1079 | /* See vlan_dev_change_mtu() in kernel. */ | |
1080 | mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); | |
1081 | ||
1082 | else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) | |
1083 | /* See macvlan_change_mtu() in kernel. */ | |
1084 | mtu = dev->mtu; | |
1085 | ||
1086 | return mtu; | |
1087 | } | |
1088 | ||
1089 | static int link_configure_mtu(Link *link) { | |
1090 | uint32_t mtu; | |
1091 | ||
1092 | assert(link); | |
1093 | assert(link->network); | |
1094 | ||
1095 | if (link->network->mtu > 0) | |
1096 | return link_set_mtu(link, link->network->mtu); | |
1097 | ||
1098 | mtu = link_get_requested_mtu_by_stacked_netdevs(link); | |
1099 | if (link->mtu >= mtu) | |
1100 | return 0; | |
1101 | ||
1102 | log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " | |
1103 | "If it is not desired, then please explicitly specify MTUBytes= setting.", | |
1104 | link->mtu, mtu); | |
1105 | ||
1106 | return link_set_mtu(link, mtu); | |
1107 | } | |
1108 | ||
1109 | static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1110 | int r; | |
1111 | ||
1112 | assert(m); | |
1113 | assert(link); | |
1114 | assert(link->ifname); | |
1115 | ||
1116 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1117 | return 1; | |
1118 | ||
1119 | r = sd_netlink_message_get_errno(m); | |
1120 | if (r < 0) | |
1121 | log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring"); | |
1122 | ||
1123 | return 1; | |
1124 | } | |
1125 | ||
1126 | static int link_set_flags(Link *link) { | |
1127 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1128 | unsigned ifi_change = 0; | |
1129 | unsigned ifi_flags = 0; | |
1130 | int r; | |
1131 | ||
1132 | assert(link); | |
1133 | assert(link->manager); | |
1134 | assert(link->manager->rtnl); | |
1135 | ||
1136 | if (link->flags & IFF_LOOPBACK) | |
1137 | return 0; | |
1138 | ||
1139 | if (!link->network) | |
1140 | return 0; | |
1141 | ||
1142 | if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0) | |
1143 | return 0; | |
1144 | ||
1145 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1146 | if (r < 0) | |
1147 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1148 | ||
1149 | if (link->network->arp >= 0) { | |
1150 | ifi_change |= IFF_NOARP; | |
1151 | SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); | |
1152 | } | |
1153 | ||
1154 | if (link->network->multicast >= 0) { | |
1155 | ifi_change |= IFF_MULTICAST; | |
1156 | SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); | |
1157 | } | |
1158 | ||
1159 | if (link->network->allmulticast >= 0) { | |
1160 | ifi_change |= IFF_ALLMULTI; | |
1161 | SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); | |
1162 | } | |
1163 | ||
1164 | r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); | |
1165 | if (r < 0) | |
1166 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1167 | ||
1168 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler, | |
1169 | link_netlink_destroy_callback, link); | |
1170 | if (r < 0) | |
1171 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1172 | ||
1173 | link_ref(link); | |
1174 | ||
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | static int link_acquire_ipv6_conf(Link *link) { | |
1179 | int r; | |
1180 | ||
1181 | assert(link); | |
1182 | ||
1183 | if (link->ndisc) { | |
1184 | log_link_debug(link, "Discovering IPv6 routers"); | |
1185 | ||
1186 | r = sd_ndisc_start(link->ndisc); | |
1187 | if (r < 0 && r != -EBUSY) | |
1188 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m"); | |
1189 | } | |
1190 | ||
1191 | if (link->radv) { | |
1192 | assert(link->radv); | |
1193 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); | |
1194 | ||
1195 | log_link_debug(link, "Starting IPv6 Router Advertisements"); | |
1196 | ||
1197 | r = radv_emit_dns(link); | |
1198 | if (r < 0) | |
1199 | return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m"); | |
1200 | ||
1201 | r = sd_radv_start(link->radv); | |
1202 | if (r < 0 && r != -EBUSY) | |
1203 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); | |
1204 | } | |
1205 | ||
1206 | if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra, | |
1207 | DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST, | |
1208 | DHCP6_CLIENT_START_MODE_SOLICIT)) { | |
1209 | assert(link->dhcp6_client); | |
1210 | assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); | |
1211 | ||
1212 | r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST); | |
1213 | if (r < 0 && r != -EBUSY) | |
1214 | return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m"); | |
1215 | else | |
1216 | log_link_debug(link, "Acquiring DHCPv6 lease"); | |
1217 | } | |
1218 | ||
1219 | r = dhcp6_request_prefix_delegation(link); | |
1220 | if (r < 0) | |
1221 | return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m"); | |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | static int link_acquire_ipv4_conf(Link *link) { | |
1227 | int r; | |
1228 | ||
1229 | assert(link); | |
1230 | assert(link->manager); | |
1231 | assert(link->manager->event); | |
1232 | ||
1233 | if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) { | |
1234 | assert(link->ipv4ll); | |
1235 | ||
1236 | log_link_debug(link, "Acquiring IPv4 link-local address"); | |
1237 | ||
1238 | r = sd_ipv4ll_start(link->ipv4ll); | |
1239 | if (r < 0) | |
1240 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
1241 | } | |
1242 | ||
1243 | if (link->dhcp_client) { | |
1244 | log_link_debug(link, "Acquiring DHCPv4 lease"); | |
1245 | ||
1246 | r = sd_dhcp_client_start(link->dhcp_client); | |
1247 | if (r < 0) | |
1248 | return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m"); | |
1249 | } | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static int link_acquire_conf(Link *link) { | |
1255 | int r; | |
1256 | ||
1257 | assert(link); | |
1258 | ||
1259 | r = link_acquire_ipv4_conf(link); | |
1260 | if (r < 0) | |
1261 | return r; | |
1262 | ||
1263 | if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) { | |
1264 | r = link_acquire_ipv6_conf(link); | |
1265 | if (r < 0) | |
1266 | return r; | |
1267 | } | |
1268 | ||
1269 | r = link_lldp_emit_start(link); | |
1270 | if (r < 0) | |
1271 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | bool link_has_carrier(Link *link) { | |
1277 | /* see Documentation/networking/operstates.txt in the kernel sources */ | |
1278 | ||
1279 | if (link->kernel_operstate == IF_OPER_UP) | |
1280 | return true; | |
1281 | ||
1282 | if (link->kernel_operstate == IF_OPER_UNKNOWN) | |
1283 | /* operstate may not be implemented, so fall back to flags */ | |
1284 | if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && | |
1285 | !FLAGS_SET(link->flags, IFF_DORMANT)) | |
1286 | return true; | |
1287 | ||
1288 | return false; | |
1289 | } | |
1290 | ||
1291 | static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1292 | int r; | |
1293 | ||
1294 | assert(link); | |
1295 | ||
1296 | link->setting_genmode = false; | |
1297 | ||
1298 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1299 | return 1; | |
1300 | ||
1301 | r = sd_netlink_message_get_errno(m); | |
1302 | if (r < 0) | |
1303 | log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring"); | |
1304 | else | |
1305 | log_link_debug(link, "Setting address genmode done."); | |
1306 | ||
1307 | if (link->state == LINK_STATE_INITIALIZED) { | |
1308 | r = link_configure_continue(link); | |
1309 | if (r < 0) | |
1310 | link_enter_failed(link); | |
1311 | } | |
1312 | ||
1313 | return 1; | |
1314 | } | |
1315 | ||
1316 | static int link_configure_addrgen_mode(Link *link) { | |
1317 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1318 | uint8_t ipv6ll_mode; | |
1319 | int r; | |
1320 | ||
1321 | assert(link); | |
1322 | assert(link->network); | |
1323 | assert(link->manager); | |
1324 | assert(link->manager->rtnl); | |
1325 | ||
1326 | if (!socket_ipv6_is_supported() || link->setting_genmode) | |
1327 | return 0; | |
1328 | ||
1329 | log_link_debug(link, "Setting address genmode for link"); | |
1330 | ||
1331 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1332 | if (r < 0) | |
1333 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1334 | ||
1335 | r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); | |
1336 | if (r < 0) | |
1337 | return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); | |
1338 | ||
1339 | r = sd_netlink_message_open_container(req, AF_INET6); | |
1340 | if (r < 0) | |
1341 | return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); | |
1342 | ||
1343 | if (!link_ipv6ll_enabled(link)) | |
1344 | ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; | |
1345 | else if (link->network->ipv6ll_address_gen_mode < 0) { | |
1346 | r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL); | |
1347 | if (r < 0) { | |
1348 | /* The file may not exist. And even if it exists, when stable_secret is unset, | |
1349 | * reading the file fails with EIO. */ | |
1350 | log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m"); | |
1351 | ||
1352 | ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; | |
1353 | } else | |
1354 | ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
1355 | } else | |
1356 | ipv6ll_mode = link->network->ipv6ll_address_gen_mode; | |
1357 | ||
1358 | r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); | |
1359 | if (r < 0) | |
1360 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); | |
1361 | ||
1362 | r = sd_netlink_message_close_container(req); | |
1363 | if (r < 0) | |
1364 | return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); | |
1365 | ||
1366 | r = sd_netlink_message_close_container(req); | |
1367 | if (r < 0) | |
1368 | return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); | |
1369 | ||
1370 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler, | |
1371 | link_netlink_destroy_callback, link); | |
1372 | if (r < 0) | |
1373 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1374 | ||
1375 | link_ref(link); | |
1376 | link->setting_genmode = true; | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1382 | int r; | |
1383 | ||
1384 | assert(link); | |
1385 | ||
1386 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1387 | return 1; | |
1388 | ||
1389 | r = sd_netlink_message_get_errno(m); | |
1390 | if (r < 0) | |
1391 | /* we warn but don't fail the link, as it may be brought up later */ | |
1392 | log_link_message_warning_errno(link, m, r, "Could not bring up interface"); | |
1393 | ||
1394 | return 1; | |
1395 | } | |
1396 | ||
1397 | static int link_up(Link *link) { | |
1398 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1399 | int r; | |
1400 | ||
1401 | assert(link); | |
1402 | assert(link->network); | |
1403 | assert(link->manager); | |
1404 | assert(link->manager->rtnl); | |
1405 | ||
1406 | log_link_debug(link, "Bringing link up"); | |
1407 | ||
1408 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1409 | if (r < 0) | |
1410 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1411 | ||
1412 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); | |
1413 | if (r < 0) | |
1414 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1415 | ||
1416 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler, | |
1417 | link_netlink_destroy_callback, link); | |
1418 | if (r < 0) | |
1419 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1420 | ||
1421 | link_ref(link); | |
1422 | ||
1423 | return 0; | |
1424 | } | |
1425 | ||
1426 | static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1427 | int r; | |
1428 | ||
1429 | assert(link); | |
1430 | ||
1431 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1432 | return 1; | |
1433 | ||
1434 | r = sd_netlink_message_get_errno(m); | |
1435 | if (r < 0) | |
1436 | log_link_message_warning_errno(link, m, r, "Could not bring down interface"); | |
1437 | ||
1438 | return 1; | |
1439 | } | |
1440 | ||
1441 | int link_down(Link *link, link_netlink_message_handler_t callback) { | |
1442 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1443 | int r; | |
1444 | ||
1445 | assert(link); | |
1446 | assert(link->manager); | |
1447 | assert(link->manager->rtnl); | |
1448 | ||
1449 | log_link_debug(link, "Bringing link down"); | |
1450 | ||
1451 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
1452 | RTM_SETLINK, link->ifindex); | |
1453 | if (r < 0) | |
1454 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1455 | ||
1456 | r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); | |
1457 | if (r < 0) | |
1458 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1459 | ||
1460 | r = netlink_call_async(link->manager->rtnl, NULL, req, | |
1461 | callback ?: link_down_handler, | |
1462 | link_netlink_destroy_callback, link); | |
1463 | if (r < 0) | |
1464 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1465 | ||
1466 | link_ref(link); | |
1467 | ||
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1472 | int r; | |
1473 | ||
1474 | assert(link); | |
1475 | ||
1476 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1477 | return 1; | |
1478 | ||
1479 | r = sd_netlink_message_get_errno(m); | |
1480 | if (r < 0) | |
1481 | log_link_message_warning_errno(link, m, r, "Could not set group for the interface"); | |
1482 | ||
1483 | return 1; | |
1484 | } | |
1485 | ||
1486 | static int link_set_group(Link *link) { | |
1487 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1488 | int r; | |
1489 | ||
1490 | assert(link); | |
1491 | assert(link->network); | |
1492 | assert(link->manager); | |
1493 | assert(link->manager->rtnl); | |
1494 | ||
1495 | if (link->network->group <= 0) | |
1496 | return 0; | |
1497 | ||
1498 | log_link_debug(link, "Setting group"); | |
1499 | ||
1500 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1501 | if (r < 0) | |
1502 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1503 | ||
1504 | r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group); | |
1505 | if (r < 0) | |
1506 | return log_link_error_errno(link, r, "Could not set link group: %m"); | |
1507 | ||
1508 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler, | |
1509 | link_netlink_destroy_callback, link); | |
1510 | if (r < 0) | |
1511 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1512 | ||
1513 | link_ref(link); | |
1514 | ||
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static int link_handle_bound_to_list(Link *link) { | |
1519 | Link *l; | |
1520 | int r; | |
1521 | bool required_up = false; | |
1522 | bool link_is_up = false; | |
1523 | ||
1524 | assert(link); | |
1525 | ||
1526 | if (hashmap_isempty(link->bound_to_links)) | |
1527 | return 0; | |
1528 | ||
1529 | if (link->flags & IFF_UP) | |
1530 | link_is_up = true; | |
1531 | ||
1532 | HASHMAP_FOREACH (l, link->bound_to_links) | |
1533 | if (link_has_carrier(l)) { | |
1534 | required_up = true; | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | if (!required_up && link_is_up) { | |
1539 | r = link_down(link, NULL); | |
1540 | if (r < 0) | |
1541 | return r; | |
1542 | } else if (required_up && !link_is_up) { | |
1543 | r = link_up(link); | |
1544 | if (r < 0) | |
1545 | return r; | |
1546 | } | |
1547 | ||
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | static int link_handle_bound_by_list(Link *link) { | |
1552 | Link *l; | |
1553 | int r; | |
1554 | ||
1555 | assert(link); | |
1556 | ||
1557 | if (hashmap_isempty(link->bound_by_links)) | |
1558 | return 0; | |
1559 | ||
1560 | HASHMAP_FOREACH (l, link->bound_by_links) { | |
1561 | r = link_handle_bound_to_list(l); | |
1562 | if (r < 0) | |
1563 | return r; | |
1564 | } | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
1570 | int r; | |
1571 | ||
1572 | assert(link); | |
1573 | assert(carrier); | |
1574 | ||
1575 | if (link == carrier) | |
1576 | return 0; | |
1577 | ||
1578 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
1579 | return 0; | |
1580 | ||
1581 | r = hashmap_ensure_allocated(h, NULL); | |
1582 | if (r < 0) | |
1583 | return r; | |
1584 | ||
1585 | r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier); | |
1586 | if (r < 0) | |
1587 | return r; | |
1588 | ||
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | static int link_new_bound_by_list(Link *link) { | |
1593 | Manager *m; | |
1594 | Link *carrier; | |
1595 | int r; | |
1596 | bool list_updated = false; | |
1597 | ||
1598 | assert(link); | |
1599 | assert(link->manager); | |
1600 | ||
1601 | m = link->manager; | |
1602 | ||
1603 | HASHMAP_FOREACH(carrier, m->links) { | |
1604 | if (!carrier->network) | |
1605 | continue; | |
1606 | ||
1607 | if (strv_isempty(carrier->network->bind_carrier)) | |
1608 | continue; | |
1609 | ||
1610 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { | |
1611 | r = link_put_carrier(link, carrier, &link->bound_by_links); | |
1612 | if (r < 0) | |
1613 | return r; | |
1614 | ||
1615 | list_updated = true; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | if (list_updated) | |
1620 | link_dirty(link); | |
1621 | ||
1622 | HASHMAP_FOREACH(carrier, link->bound_by_links) { | |
1623 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); | |
1624 | if (r < 0) | |
1625 | return r; | |
1626 | ||
1627 | link_dirty(carrier); | |
1628 | } | |
1629 | ||
1630 | return 0; | |
1631 | } | |
1632 | ||
1633 | static int link_new_bound_to_list(Link *link) { | |
1634 | Manager *m; | |
1635 | Link *carrier; | |
1636 | int r; | |
1637 | bool list_updated = false; | |
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 | ||
1650 | HASHMAP_FOREACH (carrier, m->links) { | |
1651 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { | |
1652 | r = link_put_carrier(link, carrier, &link->bound_to_links); | |
1653 | if (r < 0) | |
1654 | return r; | |
1655 | ||
1656 | list_updated = true; | |
1657 | } | |
1658 | } | |
1659 | ||
1660 | if (list_updated) | |
1661 | link_dirty(link); | |
1662 | ||
1663 | HASHMAP_FOREACH (carrier, link->bound_to_links) { | |
1664 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); | |
1665 | if (r < 0) | |
1666 | return r; | |
1667 | ||
1668 | link_dirty(carrier); | |
1669 | } | |
1670 | ||
1671 | return 0; | |
1672 | } | |
1673 | ||
1674 | static int link_new_carrier_maps(Link *link) { | |
1675 | int r; | |
1676 | ||
1677 | r = link_new_bound_by_list(link); | |
1678 | if (r < 0) | |
1679 | return r; | |
1680 | ||
1681 | r = link_handle_bound_by_list(link); | |
1682 | if (r < 0) | |
1683 | return r; | |
1684 | ||
1685 | r = link_new_bound_to_list(link); | |
1686 | if (r < 0) | |
1687 | return r; | |
1688 | ||
1689 | r = link_handle_bound_to_list(link); | |
1690 | if (r < 0) | |
1691 | return r; | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | static void link_free_bound_to_list(Link *link) { | |
1697 | Link *bound_to; | |
1698 | ||
1699 | HASHMAP_FOREACH (bound_to, link->bound_to_links) { | |
1700 | hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex)); | |
1701 | ||
1702 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
1703 | link_dirty(bound_to); | |
1704 | } | |
1705 | ||
1706 | return; | |
1707 | } | |
1708 | ||
1709 | static void link_free_bound_by_list(Link *link) { | |
1710 | Link *bound_by; | |
1711 | ||
1712 | HASHMAP_FOREACH (bound_by, link->bound_by_links) { | |
1713 | hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex)); | |
1714 | ||
1715 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
1716 | link_dirty(bound_by); | |
1717 | link_handle_bound_to_list(bound_by); | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | return; | |
1722 | } | |
1723 | ||
1724 | static void link_free_carrier_maps(Link *link) { | |
1725 | bool list_updated = false; | |
1726 | ||
1727 | assert(link); | |
1728 | ||
1729 | if (!hashmap_isempty(link->bound_to_links)) { | |
1730 | link_free_bound_to_list(link); | |
1731 | list_updated = true; | |
1732 | } | |
1733 | ||
1734 | if (!hashmap_isempty(link->bound_by_links)) { | |
1735 | link_free_bound_by_list(link); | |
1736 | list_updated = true; | |
1737 | } | |
1738 | ||
1739 | if (list_updated) | |
1740 | link_dirty(link); | |
1741 | ||
1742 | return; | |
1743 | } | |
1744 | ||
1745 | static int link_append_to_master(Link *link, NetDev *netdev) { | |
1746 | Link *master; | |
1747 | int r; | |
1748 | ||
1749 | assert(link); | |
1750 | assert(netdev); | |
1751 | ||
1752 | r = link_get(link->manager, netdev->ifindex, &master); | |
1753 | if (r < 0) | |
1754 | return r; | |
1755 | ||
1756 | r = set_ensure_put(&master->slaves, NULL, link); | |
1757 | if (r <= 0) | |
1758 | return r; | |
1759 | ||
1760 | link_ref(link); | |
1761 | return 0; | |
1762 | } | |
1763 | ||
1764 | static void link_drop_from_master(Link *link, NetDev *netdev) { | |
1765 | Link *master; | |
1766 | ||
1767 | assert(link); | |
1768 | ||
1769 | if (!link->manager || !netdev) | |
1770 | return; | |
1771 | ||
1772 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
1773 | return; | |
1774 | ||
1775 | link_unref(set_remove(master->slaves, link)); | |
1776 | } | |
1777 | ||
1778 | static void link_detach_from_manager(Link *link) { | |
1779 | if (!link || !link->manager) | |
1780 | return; | |
1781 | ||
1782 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); | |
1783 | link_clean(link); | |
1784 | ||
1785 | /* The following must be called at last. */ | |
1786 | assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); | |
1787 | link_unref(link); | |
1788 | } | |
1789 | ||
1790 | void link_drop(Link *link) { | |
1791 | if (!link || link->state == LINK_STATE_LINGER) | |
1792 | return; | |
1793 | ||
1794 | link_set_state(link, LINK_STATE_LINGER); | |
1795 | ||
1796 | link_free_carrier_maps(link); | |
1797 | ||
1798 | if (link->network) { | |
1799 | link_drop_from_master(link, link->network->bridge); | |
1800 | link_drop_from_master(link, link->network->bond); | |
1801 | } | |
1802 | ||
1803 | log_link_debug(link, "Link removed"); | |
1804 | ||
1805 | (void) unlink(link->state_file); | |
1806 | link_detach_from_manager(link); | |
1807 | } | |
1808 | ||
1809 | static int link_joined(Link *link) { | |
1810 | int r; | |
1811 | ||
1812 | assert(link); | |
1813 | assert(link->network); | |
1814 | ||
1815 | if (!hashmap_isempty(link->bound_to_links)) { | |
1816 | r = link_handle_bound_to_list(link); | |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | } else if (!(link->flags & IFF_UP)) { | |
1820 | r = link_up(link); | |
1821 | if (r < 0) { | |
1822 | link_enter_failed(link); | |
1823 | return r; | |
1824 | } | |
1825 | } | |
1826 | ||
1827 | if (link->network->bridge) { | |
1828 | r = link_set_bridge(link); | |
1829 | if (r < 0) | |
1830 | log_link_error_errno(link, r, "Could not set bridge message: %m"); | |
1831 | ||
1832 | r = link_append_to_master(link, link->network->bridge); | |
1833 | if (r < 0) | |
1834 | log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m"); | |
1835 | } | |
1836 | ||
1837 | if (link->network->bond) { | |
1838 | r = link_set_bond(link); | |
1839 | if (r < 0) | |
1840 | log_link_error_errno(link, r, "Could not set bond message: %m"); | |
1841 | ||
1842 | r = link_append_to_master(link, link->network->bond); | |
1843 | if (r < 0) | |
1844 | log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m"); | |
1845 | } | |
1846 | ||
1847 | r = link_set_bridge_vlan(link); | |
1848 | if (r < 0) | |
1849 | log_link_error_errno(link, r, "Could not set bridge vlan: %m"); | |
1850 | ||
1851 | /* Skip setting up addresses until it gets carrier, | |
1852 | or it would try to set addresses twice, | |
1853 | which is bad for non-idempotent steps. */ | |
1854 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) | |
1855 | return 0; | |
1856 | ||
1857 | link_set_state(link, LINK_STATE_CONFIGURING); | |
1858 | ||
1859 | r = link_acquire_conf(link); | |
1860 | if (r < 0) | |
1861 | return r; | |
1862 | ||
1863 | return link_set_static_configs(link); | |
1864 | } | |
1865 | ||
1866 | static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
1867 | int r; | |
1868 | ||
1869 | assert(link); | |
1870 | assert(link->network); | |
1871 | assert(link->enslaving > 0); | |
1872 | ||
1873 | link->enslaving--; | |
1874 | ||
1875 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1876 | return 1; | |
1877 | ||
1878 | r = sd_netlink_message_get_errno(m); | |
1879 | if (r < 0 && r != -EEXIST) { | |
1880 | log_link_message_warning_errno(link, m, r, "Could not join netdev"); | |
1881 | link_enter_failed(link); | |
1882 | return 1; | |
1883 | } | |
1884 | ||
1885 | log_link_debug(link, "Joined netdev"); | |
1886 | ||
1887 | if (link->enslaving == 0) { | |
1888 | r = link_joined(link); | |
1889 | if (r < 0) | |
1890 | link_enter_failed(link); | |
1891 | } | |
1892 | ||
1893 | return 1; | |
1894 | } | |
1895 | ||
1896 | static int link_enter_join_netdev(Link *link) { | |
1897 | NetDev *netdev; | |
1898 | int r; | |
1899 | ||
1900 | assert(link); | |
1901 | assert(link->network); | |
1902 | assert(link->state == LINK_STATE_INITIALIZED); | |
1903 | ||
1904 | link_set_state(link, LINK_STATE_CONFIGURING); | |
1905 | ||
1906 | link_dirty(link); | |
1907 | link->enslaving = 0; | |
1908 | ||
1909 | if (link->network->bond) { | |
1910 | if (link->network->bond->state == NETDEV_STATE_READY && | |
1911 | link->network->bond->ifindex == link->master_ifindex) | |
1912 | return link_joined(link); | |
1913 | ||
1914 | log_struct(LOG_DEBUG, | |
1915 | LOG_LINK_INTERFACE(link), | |
1916 | LOG_NETDEV_INTERFACE(link->network->bond), | |
1917 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname)); | |
1918 | ||
1919 | link->enslaving++; | |
1920 | ||
1921 | r = netdev_join(link->network->bond, link, netdev_join_handler); | |
1922 | if (r < 0) { | |
1923 | log_struct_errno(LOG_WARNING, r, | |
1924 | LOG_LINK_INTERFACE(link), | |
1925 | LOG_NETDEV_INTERFACE(link->network->bond), | |
1926 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname)); | |
1927 | link_enter_failed(link); | |
1928 | return r; | |
1929 | } | |
1930 | } | |
1931 | ||
1932 | if (link->network->bridge) { | |
1933 | log_struct(LOG_DEBUG, | |
1934 | LOG_LINK_INTERFACE(link), | |
1935 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
1936 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname)); | |
1937 | ||
1938 | link->enslaving++; | |
1939 | ||
1940 | r = netdev_join(link->network->bridge, link, netdev_join_handler); | |
1941 | if (r < 0) { | |
1942 | log_struct_errno(LOG_WARNING, r, | |
1943 | LOG_LINK_INTERFACE(link), | |
1944 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
1945 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname)); | |
1946 | link_enter_failed(link); | |
1947 | return r; | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | if (link->network->vrf) { | |
1952 | log_struct(LOG_DEBUG, | |
1953 | LOG_LINK_INTERFACE(link), | |
1954 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
1955 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname)); | |
1956 | ||
1957 | link->enslaving++; | |
1958 | ||
1959 | r = netdev_join(link->network->vrf, link, netdev_join_handler); | |
1960 | if (r < 0) { | |
1961 | log_struct_errno(LOG_WARNING, r, | |
1962 | LOG_LINK_INTERFACE(link), | |
1963 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
1964 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname)); | |
1965 | link_enter_failed(link); | |
1966 | return r; | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { | |
1971 | ||
1972 | if (netdev->ifindex > 0) | |
1973 | /* Assume already enslaved. */ | |
1974 | continue; | |
1975 | ||
1976 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) | |
1977 | continue; | |
1978 | ||
1979 | log_struct(LOG_DEBUG, | |
1980 | LOG_LINK_INTERFACE(link), | |
1981 | LOG_NETDEV_INTERFACE(netdev), | |
1982 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
1983 | ||
1984 | link->enslaving++; | |
1985 | ||
1986 | r = netdev_join(netdev, link, netdev_join_handler); | |
1987 | if (r < 0) { | |
1988 | log_struct_errno(LOG_WARNING, r, | |
1989 | LOG_LINK_INTERFACE(link), | |
1990 | LOG_NETDEV_INTERFACE(netdev), | |
1991 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
1992 | link_enter_failed(link); | |
1993 | return r; | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | if (link->enslaving == 0) | |
1998 | return link_joined(link); | |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
2003 | static int link_drop_foreign_config(Link *link) { | |
2004 | int r; | |
2005 | ||
2006 | r = link_drop_foreign_addresses(link); | |
2007 | if (r < 0) | |
2008 | return r; | |
2009 | ||
2010 | r = link_drop_foreign_neighbors(link); | |
2011 | if (r < 0) | |
2012 | return r; | |
2013 | ||
2014 | return link_drop_foreign_routes(link); | |
2015 | } | |
2016 | ||
2017 | static int link_drop_config(Link *link) { | |
2018 | int r; | |
2019 | ||
2020 | r = link_drop_addresses(link); | |
2021 | if (r < 0) | |
2022 | return r; | |
2023 | ||
2024 | r = link_drop_neighbors(link); | |
2025 | if (r < 0) | |
2026 | return r; | |
2027 | ||
2028 | r = link_drop_routes(link); | |
2029 | if (r < 0) | |
2030 | return r; | |
2031 | ||
2032 | ndisc_flush(link); | |
2033 | ||
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | int link_configure(Link *link) { | |
2038 | int r; | |
2039 | ||
2040 | assert(link); | |
2041 | assert(link->network); | |
2042 | assert(link->state == LINK_STATE_INITIALIZED); | |
2043 | ||
2044 | r = link_configure_traffic_control(link); | |
2045 | if (r < 0) | |
2046 | return r; | |
2047 | ||
2048 | r = link_configure_sr_iov(link); | |
2049 | if (r < 0) | |
2050 | return r; | |
2051 | ||
2052 | if (link->iftype == ARPHRD_CAN) | |
2053 | return link_configure_can(link); | |
2054 | ||
2055 | r = link_set_sysctl(link); | |
2056 | if (r < 0) | |
2057 | return r; | |
2058 | ||
2059 | r = link_set_ipv6_proxy_ndp_addresses(link); | |
2060 | if (r < 0) | |
2061 | return r; | |
2062 | ||
2063 | r = link_set_mac(link); | |
2064 | if (r < 0) | |
2065 | return r; | |
2066 | ||
2067 | r = link_set_nomaster(link); | |
2068 | if (r < 0) | |
2069 | return r; | |
2070 | ||
2071 | r = link_set_flags(link); | |
2072 | if (r < 0) | |
2073 | return r; | |
2074 | ||
2075 | r = link_set_group(link); | |
2076 | if (r < 0) | |
2077 | return r; | |
2078 | ||
2079 | r = ipv4ll_configure(link); | |
2080 | if (r < 0) | |
2081 | return r; | |
2082 | ||
2083 | r = dhcp4_configure(link); | |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | ||
2087 | r = dhcp6_configure(link); | |
2088 | if (r < 0) | |
2089 | return r; | |
2090 | ||
2091 | r = ndisc_configure(link); | |
2092 | if (r < 0) | |
2093 | return r; | |
2094 | ||
2095 | r = radv_configure(link); | |
2096 | if (r < 0) | |
2097 | return r; | |
2098 | ||
2099 | r = link_lldp_rx_configure(link); | |
2100 | if (r < 0) | |
2101 | return r; | |
2102 | ||
2103 | r = link_configure_mtu(link); | |
2104 | if (r < 0) | |
2105 | return r; | |
2106 | ||
2107 | r = link_configure_addrgen_mode(link); | |
2108 | if (r < 0) | |
2109 | return r; | |
2110 | ||
2111 | return link_configure_continue(link); | |
2112 | } | |
2113 | ||
2114 | /* The configuration continues in this separate function, instead of | |
2115 | * including this in the above link_configure() function, for two | |
2116 | * reasons: | |
2117 | * 1) some devices reset the link when the mtu is set, which caused | |
2118 | * an infinite loop here in networkd; see: | |
2119 | * https://github.com/systemd/systemd/issues/6593 | |
2120 | * https://github.com/systemd/systemd/issues/9831 | |
2121 | * 2) if ipv6ll is disabled, then bringing the interface up must be | |
2122 | * delayed until after we get confirmation from the kernel that | |
2123 | * the addr_gen_mode parameter has been set (via netlink), see: | |
2124 | * https://github.com/systemd/systemd/issues/13882 | |
2125 | */ | |
2126 | static int link_configure_continue(Link *link) { | |
2127 | int r; | |
2128 | ||
2129 | assert(link); | |
2130 | assert(link->network); | |
2131 | assert(link->state == LINK_STATE_INITIALIZED); | |
2132 | ||
2133 | if (link->setting_mtu || link->setting_genmode) | |
2134 | return 0; | |
2135 | ||
2136 | /* Drop foreign config, but ignore loopback or critical devices. | |
2137 | * We do not want to remove loopback address or addresses used for root NFS. */ | |
2138 | if (!(link->flags & IFF_LOOPBACK) && | |
2139 | link->network->keep_configuration != KEEP_CONFIGURATION_YES) { | |
2140 | r = link_drop_foreign_config(link); | |
2141 | if (r < 0) | |
2142 | return r; | |
2143 | } | |
2144 | ||
2145 | /* The kernel resets ipv6 mtu after changing device mtu; | |
2146 | * we must set this here, after we've set device mtu */ | |
2147 | r = link_set_ipv6_mtu(link); | |
2148 | if (r < 0) | |
2149 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m"); | |
2150 | ||
2151 | return link_enter_join_netdev(link); | |
2152 | } | |
2153 | ||
2154 | static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) { | |
2155 | Network *network; | |
2156 | int r; | |
2157 | ||
2158 | if (m) { | |
2159 | _cleanup_strv_free_ char **s = NULL; | |
2160 | ||
2161 | r = sd_netlink_message_get_errno(m); | |
2162 | if (r < 0) | |
2163 | return r; | |
2164 | ||
2165 | r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); | |
2166 | if (r < 0 && r != -ENODATA) | |
2167 | return r; | |
2168 | ||
2169 | strv_free_and_replace(link->alternative_names, s); | |
2170 | } | |
2171 | ||
2172 | r = network_get(link->manager, link->iftype, link->sd_device, | |
2173 | link->ifname, link->alternative_names, link->driver, | |
2174 | &link->hw_addr.addr.ether, &link->permanent_mac, | |
2175 | link->wlan_iftype, link->ssid, &link->bssid, &network); | |
2176 | if (r == -ENOENT) { | |
2177 | link_enter_unmanaged(link); | |
2178 | return 0; | |
2179 | } else if (r == 0 && network->unmanaged) { | |
2180 | link_enter_unmanaged(link); | |
2181 | return 0; | |
2182 | } else if (r < 0) | |
2183 | return r; | |
2184 | ||
2185 | if (link->network == network && !force) | |
2186 | return 0; | |
2187 | ||
2188 | log_link_info(link, "Re-configuring with %s", network->filename); | |
2189 | ||
2190 | /* Dropping old .network file */ | |
2191 | r = link_stop_engines(link, false); | |
2192 | if (r < 0) | |
2193 | return r; | |
2194 | ||
2195 | r = link_drop_config(link); | |
2196 | if (r < 0) | |
2197 | return r; | |
2198 | ||
2199 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { | |
2200 | log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); | |
2201 | r = link_drop_foreign_config(link); | |
2202 | if (r < 0) | |
2203 | return r; | |
2204 | } | |
2205 | ||
2206 | link_free_carrier_maps(link); | |
2207 | link_free_engines(link); | |
2208 | link->network = network_unref(link->network); | |
2209 | ||
2210 | /* Then, apply new .network file */ | |
2211 | r = network_apply(network, link); | |
2212 | if (r < 0) | |
2213 | return r; | |
2214 | ||
2215 | r = link_new_carrier_maps(link); | |
2216 | if (r < 0) | |
2217 | return r; | |
2218 | ||
2219 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2220 | link_dirty(link); | |
2221 | ||
2222 | /* link_configure_duid() returns 0 if it requests product UUID. In that case, | |
2223 | * link_configure() is called later asynchronously. */ | |
2224 | r = link_configure_duid(link); | |
2225 | if (r <= 0) | |
2226 | return r; | |
2227 | ||
2228 | r = link_configure(link); | |
2229 | if (r < 0) | |
2230 | return r; | |
2231 | ||
2232 | return 0; | |
2233 | } | |
2234 | ||
2235 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2236 | int r; | |
2237 | ||
2238 | r = link_reconfigure_internal(link, m, false); | |
2239 | if (r < 0) | |
2240 | link_enter_failed(link); | |
2241 | ||
2242 | return 1; | |
2243 | } | |
2244 | ||
2245 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2246 | int r; | |
2247 | ||
2248 | r = link_reconfigure_internal(link, m, true); | |
2249 | if (r < 0) | |
2250 | link_enter_failed(link); | |
2251 | ||
2252 | return 1; | |
2253 | } | |
2254 | ||
2255 | int link_reconfigure(Link *link, bool force) { | |
2256 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2257 | int r; | |
2258 | ||
2259 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER)) | |
2260 | return 0; | |
2261 | ||
2262 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, | |
2263 | link->ifindex); | |
2264 | if (r < 0) | |
2265 | return r; | |
2266 | ||
2267 | r = netlink_call_async(link->manager->rtnl, NULL, req, | |
2268 | force ? link_force_reconfigure_handler : link_reconfigure_handler, | |
2269 | link_netlink_destroy_callback, link); | |
2270 | if (r < 0) | |
2271 | return r; | |
2272 | ||
2273 | link_ref(link); | |
2274 | ||
2275 | return 0; | |
2276 | } | |
2277 | ||
2278 | static int link_initialized_and_synced(Link *link) { | |
2279 | Network *network; | |
2280 | int r; | |
2281 | ||
2282 | assert(link); | |
2283 | assert(link->ifname); | |
2284 | assert(link->manager); | |
2285 | ||
2286 | /* We may get called either from the asynchronous netlink callback, | |
2287 | * or directly for link_add() if running in a container. See link_add(). */ | |
2288 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
2289 | return 0; | |
2290 | ||
2291 | log_link_debug(link, "Link state is up-to-date"); | |
2292 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2293 | ||
2294 | r = link_new_bound_by_list(link); | |
2295 | if (r < 0) | |
2296 | return r; | |
2297 | ||
2298 | r = link_handle_bound_by_list(link); | |
2299 | if (r < 0) | |
2300 | return r; | |
2301 | ||
2302 | if (!link->network) { | |
2303 | r = wifi_get_info(link); | |
2304 | if (r < 0) | |
2305 | return r; | |
2306 | ||
2307 | r = network_get(link->manager, link->iftype, link->sd_device, | |
2308 | link->ifname, link->alternative_names, link->driver, | |
2309 | &link->hw_addr.addr.ether, &link->permanent_mac, | |
2310 | link->wlan_iftype, link->ssid, &link->bssid, &network); | |
2311 | if (r == -ENOENT) { | |
2312 | link_enter_unmanaged(link); | |
2313 | return 0; | |
2314 | } else if (r == 0 && network->unmanaged) { | |
2315 | link_enter_unmanaged(link); | |
2316 | return 0; | |
2317 | } else if (r < 0) | |
2318 | return r; | |
2319 | ||
2320 | if (link->flags & IFF_LOOPBACK) { | |
2321 | if (network->link_local != ADDRESS_FAMILY_NO) | |
2322 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
2323 | ||
2324 | if (network->dhcp != ADDRESS_FAMILY_NO) | |
2325 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
2326 | ||
2327 | if (network->dhcp_server) | |
2328 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
2329 | } | |
2330 | ||
2331 | r = network_apply(network, link); | |
2332 | if (r < 0) | |
2333 | return r; | |
2334 | } | |
2335 | ||
2336 | r = link_new_bound_to_list(link); | |
2337 | if (r < 0) | |
2338 | return r; | |
2339 | ||
2340 | /* link_configure_duid() returns 0 if it requests product UUID. In that case, | |
2341 | * link_configure() is called later asynchronously. */ | |
2342 | r = link_configure_duid(link); | |
2343 | if (r <= 0) | |
2344 | return r; | |
2345 | ||
2346 | r = link_configure(link); | |
2347 | if (r < 0) | |
2348 | return r; | |
2349 | ||
2350 | return 0; | |
2351 | } | |
2352 | ||
2353 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2354 | _cleanup_strv_free_ char **s = NULL; | |
2355 | int r; | |
2356 | ||
2357 | r = sd_netlink_message_get_errno(m); | |
2358 | if (r < 0) { | |
2359 | log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m"); | |
2360 | link_enter_failed(link); | |
2361 | return 0; | |
2362 | } | |
2363 | ||
2364 | r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); | |
2365 | if (r < 0 && r != -ENODATA) { | |
2366 | link_enter_failed(link); | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | strv_free_and_replace(link->alternative_names, s); | |
2371 | ||
2372 | r = link_initialized_and_synced(link); | |
2373 | if (r < 0) | |
2374 | link_enter_failed(link); | |
2375 | return 1; | |
2376 | } | |
2377 | ||
2378 | int link_initialized(Link *link, sd_device *device) { | |
2379 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2380 | int r; | |
2381 | ||
2382 | assert(link); | |
2383 | assert(link->manager); | |
2384 | assert(link->manager->rtnl); | |
2385 | assert(device); | |
2386 | ||
2387 | if (link->state != LINK_STATE_PENDING) | |
2388 | return 0; | |
2389 | ||
2390 | if (link->sd_device) | |
2391 | return 0; | |
2392 | ||
2393 | log_link_debug(link, "udev initialized link"); | |
2394 | link_set_state(link, LINK_STATE_INITIALIZED); | |
2395 | ||
2396 | link->sd_device = sd_device_ref(device); | |
2397 | ||
2398 | /* udev has initialized the link, but we don't know if we have yet | |
2399 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
2400 | * when it returns we know that the pending NEWLINKs have already been | |
2401 | * processed and that we are up-to-date */ | |
2402 | ||
2403 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, | |
2404 | link->ifindex); | |
2405 | if (r < 0) | |
2406 | return r; | |
2407 | ||
2408 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler, | |
2409 | link_netlink_destroy_callback, link); | |
2410 | if (r < 0) | |
2411 | return r; | |
2412 | ||
2413 | link_ref(link); | |
2414 | ||
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | int link_add(Manager *m, sd_netlink_message *message, Link **ret) { | |
2419 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; | |
2420 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; | |
2421 | Link *link; | |
2422 | int r; | |
2423 | ||
2424 | assert(m); | |
2425 | assert(m->rtnl); | |
2426 | assert(message); | |
2427 | assert(ret); | |
2428 | ||
2429 | r = link_new(m, message, ret); | |
2430 | if (r < 0) | |
2431 | return r; | |
2432 | ||
2433 | link = *ret; | |
2434 | ||
2435 | log_link_debug(link, "Link %d added", link->ifindex); | |
2436 | ||
2437 | if (path_is_read_only_fs("/sys") <= 0) { | |
2438 | /* udev should be around */ | |
2439 | sprintf(ifindex_str, "n%d", link->ifindex); | |
2440 | r = sd_device_new_from_device_id(&device, ifindex_str); | |
2441 | if (r < 0) { | |
2442 | log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m"); | |
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | r = sd_device_get_is_initialized(device); | |
2447 | if (r < 0) { | |
2448 | log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); | |
2449 | goto failed; | |
2450 | } | |
2451 | if (r == 0) { | |
2452 | /* not yet ready */ | |
2453 | log_link_debug(link, "link pending udev initialization..."); | |
2454 | return 0; | |
2455 | } | |
2456 | ||
2457 | r = device_is_renaming(device); | |
2458 | if (r < 0) { | |
2459 | log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); | |
2460 | goto failed; | |
2461 | } | |
2462 | if (r > 0) { | |
2463 | log_link_debug(link, "Interface is being renamed, pending initialization."); | |
2464 | return 0; | |
2465 | } | |
2466 | ||
2467 | r = link_initialized(link, device); | |
2468 | if (r < 0) | |
2469 | goto failed; | |
2470 | } else { | |
2471 | r = link_initialized_and_synced(link); | |
2472 | if (r < 0) | |
2473 | goto failed; | |
2474 | } | |
2475 | ||
2476 | return 0; | |
2477 | failed: | |
2478 | link_enter_failed(link); | |
2479 | return r; | |
2480 | } | |
2481 | ||
2482 | int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { | |
2483 | int r; | |
2484 | ||
2485 | assert(link); | |
2486 | ||
2487 | log_link_info(link, "Gained IPv6LL"); | |
2488 | ||
2489 | link->ipv6ll_address = *address; | |
2490 | link_check_ready(link); | |
2491 | ||
2492 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
2493 | r = link_acquire_ipv6_conf(link); | |
2494 | if (r < 0) { | |
2495 | link_enter_failed(link); | |
2496 | return r; | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | return 0; | |
2501 | } | |
2502 | ||
2503 | static int link_carrier_gained(Link *link) { | |
2504 | int r; | |
2505 | ||
2506 | assert(link); | |
2507 | ||
2508 | r = wifi_get_info(link); | |
2509 | if (r < 0) | |
2510 | return r; | |
2511 | if (r > 0) { | |
2512 | r = link_reconfigure_internal(link, NULL, false); | |
2513 | if (r < 0) { | |
2514 | link_enter_failed(link); | |
2515 | return r; | |
2516 | } | |
2517 | } | |
2518 | ||
2519 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
2520 | r = link_acquire_conf(link); | |
2521 | if (r < 0) { | |
2522 | link_enter_failed(link); | |
2523 | return r; | |
2524 | } | |
2525 | ||
2526 | link_set_state(link, LINK_STATE_CONFIGURING); | |
2527 | r = link_set_static_configs(link); | |
2528 | if (r < 0) | |
2529 | return r; | |
2530 | } | |
2531 | ||
2532 | r = link_handle_bound_by_list(link); | |
2533 | if (r < 0) | |
2534 | return r; | |
2535 | ||
2536 | if (!link->bridge_mdb_configured) { | |
2537 | r = link_set_bridge_mdb(link); | |
2538 | if (r < 0) | |
2539 | return r; | |
2540 | } | |
2541 | ||
2542 | if (streq_ptr(link->kind, "bridge")) { | |
2543 | Link *slave; | |
2544 | ||
2545 | SET_FOREACH(slave, link->slaves) { | |
2546 | if (slave->bridge_mdb_configured) | |
2547 | continue; | |
2548 | ||
2549 | r = link_set_bridge_mdb(slave); | |
2550 | if (r < 0) | |
2551 | link_enter_failed(slave); | |
2552 | } | |
2553 | } | |
2554 | ||
2555 | return 0; | |
2556 | } | |
2557 | ||
2558 | static int link_carrier_lost(Link *link) { | |
2559 | int r; | |
2560 | ||
2561 | assert(link); | |
2562 | ||
2563 | if (link->network && link->network->ignore_carrier_loss) | |
2564 | return 0; | |
2565 | ||
2566 | /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop. | |
2567 | * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the | |
2568 | * configuration and stop the clients as well. */ | |
2569 | if (link->setting_mtu) | |
2570 | return 0; | |
2571 | ||
2572 | r = link_stop_engines(link, false); | |
2573 | if (r < 0) { | |
2574 | link_enter_failed(link); | |
2575 | return r; | |
2576 | } | |
2577 | ||
2578 | r = link_drop_config(link); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | ||
2582 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { | |
2583 | log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state)); | |
2584 | r = link_drop_foreign_config(link); | |
2585 | if (r < 0) | |
2586 | return r; | |
2587 | } | |
2588 | ||
2589 | r = link_handle_bound_by_list(link); | |
2590 | if (r < 0) | |
2591 | return r; | |
2592 | ||
2593 | return 0; | |
2594 | } | |
2595 | ||
2596 | int link_carrier_reset(Link *link) { | |
2597 | int r; | |
2598 | ||
2599 | assert(link); | |
2600 | ||
2601 | if (link_has_carrier(link)) { | |
2602 | r = link_carrier_lost(link); | |
2603 | if (r < 0) | |
2604 | return r; | |
2605 | ||
2606 | r = link_carrier_gained(link); | |
2607 | if (r < 0) | |
2608 | return r; | |
2609 | ||
2610 | log_link_info(link, "Reset carrier"); | |
2611 | } | |
2612 | ||
2613 | return 0; | |
2614 | } | |
2615 | ||
2616 | /* This is called every time an interface admin state changes to up; | |
2617 | * specifically, when IFF_UP flag changes from unset to set */ | |
2618 | static int link_admin_state_up(Link *link) { | |
2619 | int r; | |
2620 | ||
2621 | /* We set the ipv6 mtu after the device mtu, but the kernel resets | |
2622 | * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for | |
2623 | * ipv6_mtu_set prevents this from trying to set it too early before | |
2624 | * the link->network has been setup; we only need to reset it | |
2625 | * here if we've already set it during normal initialization. */ | |
2626 | if (link->ipv6_mtu_set) { | |
2627 | r = link_set_ipv6_mtu(link); | |
2628 | if (r < 0) | |
2629 | return r; | |
2630 | } | |
2631 | ||
2632 | return 0; | |
2633 | } | |
2634 | ||
2635 | int link_update(Link *link, sd_netlink_message *m) { | |
2636 | _cleanup_strv_free_ char **s = NULL; | |
2637 | hw_addr_data hw_addr; | |
2638 | const char *ifname; | |
2639 | uint32_t mtu; | |
2640 | bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up; | |
2641 | int old_master, r; | |
2642 | ||
2643 | assert(link); | |
2644 | assert(link->ifname); | |
2645 | assert(m); | |
2646 | ||
2647 | if (link->state == LINK_STATE_LINGER) { | |
2648 | log_link_info(link, "Link re-added"); | |
2649 | link_set_state(link, LINK_STATE_CONFIGURING); | |
2650 | ||
2651 | r = link_new_carrier_maps(link); | |
2652 | if (r < 0) | |
2653 | return r; | |
2654 | } | |
2655 | ||
2656 | r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); | |
2657 | if (r >= 0 && !streq(ifname, link->ifname)) { | |
2658 | Manager *manager = link->manager; | |
2659 | ||
2660 | log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname); | |
2661 | ||
2662 | link_drop(link); | |
2663 | r = link_add(manager, m, &link); | |
2664 | if (r < 0) | |
2665 | return r; | |
2666 | } | |
2667 | ||
2668 | r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s); | |
2669 | if (r >= 0) | |
2670 | strv_free_and_replace(link->alternative_names, s); | |
2671 | ||
2672 | r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); | |
2673 | if (r >= 0 && mtu > 0) { | |
2674 | link->mtu = mtu; | |
2675 | if (link->original_mtu == 0) { | |
2676 | link->original_mtu = mtu; | |
2677 | log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); | |
2678 | } | |
2679 | ||
2680 | if (link->dhcp_client) { | |
2681 | r = sd_dhcp_client_set_mtu(link->dhcp_client, | |
2682 | link->mtu); | |
2683 | if (r < 0) | |
2684 | return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); | |
2685 | } | |
2686 | ||
2687 | if (link->radv) { | |
2688 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
2689 | if (r < 0) | |
2690 | return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m"); | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | /* The kernel may broadcast NEWLINK messages without the MAC address | |
2695 | set, simply ignore them. */ | |
2696 | r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr); | |
2697 | if (r >= 0 && (link->hw_addr.length != hw_addr.length || | |
2698 | memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) { | |
2699 | ||
2700 | memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length); | |
2701 | ||
2702 | log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr)); | |
2703 | ||
2704 | r = ipv4ll_update_mac(link); | |
2705 | if (r < 0) | |
2706 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); | |
2707 | ||
2708 | r = dhcp4_update_mac(link); | |
2709 | if (r < 0) | |
2710 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
2711 | ||
2712 | r = dhcp6_update_mac(link); | |
2713 | if (r < 0) | |
2714 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
2715 | ||
2716 | r = radv_update_mac(link); | |
2717 | if (r < 0) | |
2718 | return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
2719 | ||
2720 | if (link->ndisc) { | |
2721 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether); | |
2722 | if (r < 0) | |
2723 | return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m"); | |
2724 | } | |
2725 | ||
2726 | r = ipv4_dad_update_mac(link); | |
2727 | if (r < 0) | |
2728 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); | |
2729 | } | |
2730 | ||
2731 | old_master = link->master_ifindex; | |
2732 | (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex); | |
2733 | ||
2734 | link_was_admin_up = link->flags & IFF_UP; | |
2735 | had_carrier = link_has_carrier(link); | |
2736 | ||
2737 | r = link_update_flags(link, m, old_master != link->master_ifindex); | |
2738 | if (r < 0) | |
2739 | return r; | |
2740 | ||
2741 | if (!link_was_admin_up && (link->flags & IFF_UP)) { | |
2742 | log_link_info(link, "Link UP"); | |
2743 | ||
2744 | r = link_admin_state_up(link); | |
2745 | if (r < 0) | |
2746 | return r; | |
2747 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) | |
2748 | log_link_info(link, "Link DOWN"); | |
2749 | ||
2750 | r = link_update_lldp(link); | |
2751 | if (r < 0) | |
2752 | return r; | |
2753 | ||
2754 | carrier_gained = !had_carrier && link_has_carrier(link); | |
2755 | carrier_lost = had_carrier && !link_has_carrier(link); | |
2756 | ||
2757 | if (carrier_gained) { | |
2758 | log_link_info(link, "Gained carrier"); | |
2759 | ||
2760 | r = link_carrier_gained(link); | |
2761 | if (r < 0) | |
2762 | return r; | |
2763 | } else if (carrier_lost) { | |
2764 | log_link_info(link, "Lost carrier"); | |
2765 | ||
2766 | r = link_carrier_lost(link); | |
2767 | if (r < 0) | |
2768 | return r; | |
2769 | } | |
2770 | ||
2771 | return 0; | |
2772 | } | |
2773 | ||
2774 | static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) { | |
2775 | bool space = false; | |
2776 | Link *link; | |
2777 | ||
2778 | assert(f); | |
2779 | assert(prefix); | |
2780 | ||
2781 | if (hashmap_isempty(h)) | |
2782 | return; | |
2783 | ||
2784 | fputs(prefix, f); | |
2785 | HASHMAP_FOREACH(link, h) { | |
2786 | if (space) | |
2787 | fputc(' ', f); | |
2788 | ||
2789 | fprintf(f, "%i", link->ifindex); | |
2790 | space = true; | |
2791 | } | |
2792 | ||
2793 | fputc('\n', f); | |
2794 | } | |
2795 | ||
2796 | static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) { | |
2797 | for (unsigned j = 0; j < n_dns; j++) { | |
2798 | const char *str; | |
2799 | ||
2800 | if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex) | |
2801 | continue; | |
2802 | ||
2803 | str = in_addr_full_to_string(dns[j]); | |
2804 | if (!str) | |
2805 | continue; | |
2806 | ||
2807 | if (*space) | |
2808 | fputc(' ', f); | |
2809 | fputs(str, f); | |
2810 | *space = true; | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | static void serialize_addresses( | |
2815 | FILE *f, | |
2816 | const char *lvalue, | |
2817 | bool *space, | |
2818 | char **addresses, | |
2819 | sd_dhcp_lease *lease, | |
2820 | bool conditional, | |
2821 | sd_dhcp_lease_server_type what, | |
2822 | sd_dhcp6_lease *lease6, | |
2823 | bool conditional6, | |
2824 | int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**), | |
2825 | int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) { | |
2826 | int r; | |
2827 | ||
2828 | bool _space = false; | |
2829 | if (!space) | |
2830 | space = &_space; | |
2831 | ||
2832 | if (lvalue) | |
2833 | fprintf(f, "%s=", lvalue); | |
2834 | fputstrv(f, addresses, NULL, space); | |
2835 | ||
2836 | if (lease && conditional) { | |
2837 | const struct in_addr *lease_addresses; | |
2838 | ||
2839 | r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses); | |
2840 | if (r > 0) | |
2841 | serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local); | |
2842 | } | |
2843 | ||
2844 | if (lease6 && conditional6 && lease6_get_addr) { | |
2845 | const struct in6_addr *in6_addrs; | |
2846 | ||
2847 | r = lease6_get_addr(lease6, &in6_addrs); | |
2848 | if (r > 0) | |
2849 | serialize_in6_addrs(f, in6_addrs, r, space); | |
2850 | } | |
2851 | ||
2852 | if (lease6 && conditional6 && lease6_get_fqdn) { | |
2853 | char **in6_hosts; | |
2854 | ||
2855 | r = lease6_get_fqdn(lease6, &in6_hosts); | |
2856 | if (r > 0) | |
2857 | fputstrv(f, in6_hosts, NULL, space); | |
2858 | } | |
2859 | ||
2860 | if (lvalue) | |
2861 | fputc('\n', f); | |
2862 | } | |
2863 | ||
2864 | int link_save(Link *link) { | |
2865 | const char *admin_state, *oper_state, *carrier_state, *address_state; | |
2866 | _cleanup_free_ char *temp_path = NULL; | |
2867 | _cleanup_fclose_ FILE *f = NULL; | |
2868 | int r; | |
2869 | ||
2870 | assert(link); | |
2871 | assert(link->state_file); | |
2872 | assert(link->lease_file); | |
2873 | assert(link->manager); | |
2874 | ||
2875 | if (link->state == LINK_STATE_LINGER) { | |
2876 | (void) unlink(link->state_file); | |
2877 | return 0; | |
2878 | } | |
2879 | ||
2880 | link_lldp_save(link); | |
2881 | ||
2882 | admin_state = link_state_to_string(link->state); | |
2883 | assert(admin_state); | |
2884 | ||
2885 | oper_state = link_operstate_to_string(link->operstate); | |
2886 | assert(oper_state); | |
2887 | ||
2888 | carrier_state = link_carrier_state_to_string(link->carrier_state); | |
2889 | assert(carrier_state); | |
2890 | ||
2891 | address_state = link_address_state_to_string(link->address_state); | |
2892 | assert(address_state); | |
2893 | ||
2894 | r = fopen_temporary(link->state_file, &f, &temp_path); | |
2895 | if (r < 0) | |
2896 | goto fail; | |
2897 | ||
2898 | (void) fchmod(fileno(f), 0644); | |
2899 | ||
2900 | fprintf(f, | |
2901 | "# This is private data. Do not parse.\n" | |
2902 | "ADMIN_STATE=%s\n" | |
2903 | "OPER_STATE=%s\n" | |
2904 | "CARRIER_STATE=%s\n" | |
2905 | "ADDRESS_STATE=%s\n", | |
2906 | admin_state, oper_state, carrier_state, address_state); | |
2907 | ||
2908 | if (link->network) { | |
2909 | char **dhcp6_domains = NULL, **dhcp_domains = NULL; | |
2910 | const char *dhcp_domainname = NULL, *p; | |
2911 | bool space; | |
2912 | ||
2913 | fprintf(f, "REQUIRED_FOR_ONLINE=%s\n", | |
2914 | yes_no(link->network->required_for_online)); | |
2915 | ||
2916 | LinkOperationalStateRange st = link->network->required_operstate_for_online; | |
2917 | fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n", | |
2918 | strempty(link_operstate_to_string(st.min)), | |
2919 | st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "", | |
2920 | st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : ""); | |
2921 | ||
2922 | fprintf(f, "NETWORK_FILE=%s\n", link->network->filename); | |
2923 | ||
2924 | /************************************************************/ | |
2925 | ||
2926 | fputs("DNS=", f); | |
2927 | space = false; | |
2928 | if (link->n_dns != (unsigned) -1) | |
2929 | link_save_dns(link, f, link->dns, link->n_dns, &space); | |
2930 | else | |
2931 | link_save_dns(link, f, link->network->dns, link->network->n_dns, &space); | |
2932 | ||
2933 | serialize_addresses(f, NULL, &space, | |
2934 | NULL, | |
2935 | link->dhcp_lease, | |
2936 | link->network->dhcp_use_dns, | |
2937 | SD_DHCP_LEASE_DNS, | |
2938 | link->dhcp6_lease, | |
2939 | link->network->dhcp6_use_dns, | |
2940 | sd_dhcp6_lease_get_dns, | |
2941 | NULL); | |
2942 | ||
2943 | /* Make sure to flush out old entries before we use the NDisc data */ | |
2944 | ndisc_vacuum(link); | |
2945 | ||
2946 | if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) { | |
2947 | NDiscRDNSS *dd; | |
2948 | ||
2949 | SET_FOREACH(dd, link->ndisc_rdnss) | |
2950 | serialize_in6_addrs(f, &dd->address, 1, &space); | |
2951 | } | |
2952 | ||
2953 | fputc('\n', f); | |
2954 | ||
2955 | /************************************************************/ | |
2956 | ||
2957 | serialize_addresses(f, "NTP", NULL, | |
2958 | link->ntp ?: link->network->ntp, | |
2959 | link->dhcp_lease, | |
2960 | link->network->dhcp_use_ntp, | |
2961 | SD_DHCP_LEASE_NTP, | |
2962 | link->dhcp6_lease, | |
2963 | link->network->dhcp6_use_ntp, | |
2964 | sd_dhcp6_lease_get_ntp_addrs, | |
2965 | sd_dhcp6_lease_get_ntp_fqdn); | |
2966 | ||
2967 | serialize_addresses(f, "SIP", NULL, | |
2968 | NULL, | |
2969 | link->dhcp_lease, | |
2970 | link->network->dhcp_use_sip, | |
2971 | SD_DHCP_LEASE_SIP, | |
2972 | NULL, false, NULL, NULL); | |
2973 | ||
2974 | /************************************************************/ | |
2975 | ||
2976 | if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) { | |
2977 | if (link->dhcp_lease) { | |
2978 | (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname); | |
2979 | (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains); | |
2980 | } | |
2981 | if (link->dhcp6_lease) | |
2982 | (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains); | |
2983 | } | |
2984 | ||
2985 | fputs("DOMAINS=", f); | |
2986 | space = false; | |
2987 | ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains) | |
2988 | fputs_with_space(f, p, NULL, &space); | |
2989 | ||
2990 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) { | |
2991 | if (dhcp_domainname) | |
2992 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
2993 | if (dhcp_domains) | |
2994 | fputstrv(f, dhcp_domains, NULL, &space); | |
2995 | if (dhcp6_domains) | |
2996 | fputstrv(f, dhcp6_domains, NULL, &space); | |
2997 | } | |
2998 | ||
2999 | if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) { | |
3000 | NDiscDNSSL *dd; | |
3001 | ||
3002 | SET_FOREACH(dd, link->ndisc_dnssl) | |
3003 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3004 | } | |
3005 | ||
3006 | fputc('\n', f); | |
3007 | ||
3008 | /************************************************************/ | |
3009 | ||
3010 | fputs("ROUTE_DOMAINS=", f); | |
3011 | space = false; | |
3012 | ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains) | |
3013 | fputs_with_space(f, p, NULL, &space); | |
3014 | ||
3015 | if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) { | |
3016 | if (dhcp_domainname) | |
3017 | fputs_with_space(f, dhcp_domainname, NULL, &space); | |
3018 | if (dhcp_domains) | |
3019 | fputstrv(f, dhcp_domains, NULL, &space); | |
3020 | if (dhcp6_domains) | |
3021 | fputstrv(f, dhcp6_domains, NULL, &space); | |
3022 | } | |
3023 | ||
3024 | if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) { | |
3025 | NDiscDNSSL *dd; | |
3026 | ||
3027 | SET_FOREACH(dd, link->ndisc_dnssl) | |
3028 | fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space); | |
3029 | } | |
3030 | ||
3031 | fputc('\n', f); | |
3032 | ||
3033 | /************************************************************/ | |
3034 | ||
3035 | fprintf(f, "LLMNR=%s\n", | |
3036 | resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr)); | |
3037 | ||
3038 | /************************************************************/ | |
3039 | ||
3040 | fprintf(f, "MDNS=%s\n", | |
3041 | resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns)); | |
3042 | ||
3043 | /************************************************************/ | |
3044 | ||
3045 | int dns_default_route = | |
3046 | link->dns_default_route >= 0 ? link->dns_default_route : | |
3047 | link->network->dns_default_route; | |
3048 | if (dns_default_route >= 0) | |
3049 | fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route)); | |
3050 | ||
3051 | /************************************************************/ | |
3052 | ||
3053 | DnsOverTlsMode dns_over_tls_mode = | |
3054 | link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode : | |
3055 | link->network->dns_over_tls_mode; | |
3056 | if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID) | |
3057 | fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode)); | |
3058 | ||
3059 | /************************************************************/ | |
3060 | ||
3061 | DnssecMode dnssec_mode = | |
3062 | link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode : | |
3063 | link->network->dnssec_mode; | |
3064 | if (dnssec_mode != _DNSSEC_MODE_INVALID) | |
3065 | fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode)); | |
3066 | ||
3067 | /************************************************************/ | |
3068 | ||
3069 | Set *nta_anchors = link->dnssec_negative_trust_anchors; | |
3070 | if (set_isempty(nta_anchors)) | |
3071 | nta_anchors = link->network->dnssec_negative_trust_anchors; | |
3072 | ||
3073 | if (!set_isempty(nta_anchors)) { | |
3074 | const char *n; | |
3075 | ||
3076 | fputs("DNSSEC_NTA=", f); | |
3077 | space = false; | |
3078 | SET_FOREACH(n, nta_anchors) | |
3079 | fputs_with_space(f, n, NULL, &space); | |
3080 | fputc('\n', f); | |
3081 | } | |
3082 | } | |
3083 | ||
3084 | print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links); | |
3085 | print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links); | |
3086 | ||
3087 | if (link->dhcp_lease) { | |
3088 | r = dhcp_lease_save(link->dhcp_lease, link->lease_file); | |
3089 | if (r < 0) | |
3090 | goto fail; | |
3091 | ||
3092 | fprintf(f, | |
3093 | "DHCP_LEASE=%s\n", | |
3094 | link->lease_file); | |
3095 | } else | |
3096 | (void) unlink(link->lease_file); | |
3097 | ||
3098 | r = link_serialize_dhcp6_client(link, f); | |
3099 | if (r < 0) | |
3100 | goto fail; | |
3101 | ||
3102 | r = fflush_and_check(f); | |
3103 | if (r < 0) | |
3104 | goto fail; | |
3105 | ||
3106 | if (rename(temp_path, link->state_file) < 0) { | |
3107 | r = -errno; | |
3108 | goto fail; | |
3109 | } | |
3110 | ||
3111 | return 0; | |
3112 | ||
3113 | fail: | |
3114 | (void) unlink(link->state_file); | |
3115 | if (temp_path) | |
3116 | (void) unlink(temp_path); | |
3117 | ||
3118 | return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file); | |
3119 | } | |
3120 | ||
3121 | /* The serialized state in /run is no longer up-to-date. */ | |
3122 | void link_dirty(Link *link) { | |
3123 | int r; | |
3124 | ||
3125 | assert(link); | |
3126 | ||
3127 | /* mark manager dirty as link is dirty */ | |
3128 | manager_dirty(link->manager); | |
3129 | ||
3130 | r = set_ensure_put(&link->manager->dirty_links, NULL, link); | |
3131 | if (r <= 0) | |
3132 | /* Ignore allocation errors and don't take another ref if the link was already dirty */ | |
3133 | return; | |
3134 | link_ref(link); | |
3135 | } | |
3136 | ||
3137 | /* The serialized state in /run is up-to-date */ | |
3138 | void link_clean(Link *link) { | |
3139 | assert(link); | |
3140 | assert(link->manager); | |
3141 | ||
3142 | link_unref(set_remove(link->manager->dirty_links, link)); | |
3143 | } | |
3144 | ||
3145 | int link_save_and_clean(Link *link) { | |
3146 | int r; | |
3147 | ||
3148 | r = link_save(link); | |
3149 | if (r < 0) | |
3150 | return r; | |
3151 | ||
3152 | link_clean(link); | |
3153 | return 0; | |
3154 | } | |
3155 | ||
3156 | static const char* const link_state_table[_LINK_STATE_MAX] = { | |
3157 | [LINK_STATE_PENDING] = "pending", | |
3158 | [LINK_STATE_INITIALIZED] = "initialized", | |
3159 | [LINK_STATE_CONFIGURING] = "configuring", | |
3160 | [LINK_STATE_CONFIGURED] = "configured", | |
3161 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
3162 | [LINK_STATE_FAILED] = "failed", | |
3163 | [LINK_STATE_LINGER] = "linger", | |
3164 | }; | |
3165 | ||
3166 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
3167 | ||
3168 | int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) { | |
3169 | const char *err_msg = NULL; | |
3170 | ||
3171 | (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg); | |
3172 | return log_link_full_errno(link, level, err, | |
3173 | "%s: %s%s%s%m", | |
3174 | msg, | |
3175 | strempty(err_msg), | |
3176 | err_msg && !endswith(err_msg, ".") ? "." : "", | |
3177 | err_msg ? " " : ""); | |
3178 | } |