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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
f579559b | 2 | |
9aa5d8ba | 3 | #include <netinet/in.h> |
f579559b | 4 | #include <linux/if.h> |
8f815e8b | 5 | #include <linux/if_arp.h> |
518cd6b5 | 6 | #include <linux/if_link.h> |
8430841b | 7 | #include <sys/socket.h> |
4cc7a82c | 8 | #include <unistd.h> |
f579559b | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
c0267a59 | 11 | #include "batadv.h" |
737f1405 YW |
12 | #include "bond.h" |
13 | #include "bridge.h" | |
1346b1f0 | 14 | #include "bus-util.h" |
3be9d62a YW |
15 | #include "device-private.h" |
16 | #include "device-util.h" | |
27dfc982 | 17 | #include "dhcp-identifier.h" |
bd91b83e | 18 | #include "dhcp-lease-internal.h" |
686d13b9 | 19 | #include "env-file.h" |
4bb7cc82 | 20 | #include "ethtool-util.h" |
3ffd4af2 | 21 | #include "fd-util.h" |
cf1d700d | 22 | #include "fileio.h" |
af664001 | 23 | #include "fs-util.h" |
737f1405 | 24 | #include "ipvlan.h" |
ef118d00 | 25 | #include "missing_network.h" |
cf1d700d | 26 | #include "netlink-util.h" |
c6f7c917 | 27 | #include "network-internal.h" |
fb486c90 | 28 | #include "networkd-address-label.h" |
093e3533 | 29 | #include "networkd-address.h" |
9671ae9d | 30 | #include "networkd-bridge-fdb.h" |
ff9e0783 | 31 | #include "networkd-bridge-mdb.h" |
3ddcbeea | 32 | #include "networkd-can.h" |
8fcf1d61 | 33 | #include "networkd-dhcp-server.h" |
ca5ad760 YW |
34 | #include "networkd-dhcp4.h" |
35 | #include "networkd-dhcp6.h" | |
36 | #include "networkd-ipv4ll.h" | |
76c5a0f2 | 37 | #include "networkd-ipv6-proxy-ndp.h" |
6a1af3d4 YW |
38 | #include "networkd-link-bus.h" |
39 | #include "networkd-link.h" | |
8e1ad1ea | 40 | #include "networkd-lldp-tx.h" |
23f53b99 | 41 | #include "networkd-manager.h" |
1e7a0e21 | 42 | #include "networkd-ndisc.h" |
e4a71bf3 | 43 | #include "networkd-neighbor.h" |
75156ccb | 44 | #include "networkd-nexthop.h" |
19d9a5ad | 45 | #include "networkd-queue.h" |
7465dd22 | 46 | #include "networkd-radv.h" |
bce67bbe | 47 | #include "networkd-routing-policy-rule.h" |
0fa8ee6c | 48 | #include "networkd-setlink.h" |
19d9a5ad | 49 | #include "networkd-sriov.h" |
3b5a4fc6 | 50 | #include "networkd-state-file.h" |
19d9a5ad | 51 | #include "networkd-sysctl.h" |
8d968fdd | 52 | #include "networkd-wifi.h" |
cf1d700d TG |
53 | #include "set.h" |
54 | #include "socket-util.h" | |
bf331d87 | 55 | #include "stat-util.h" |
15a5e950 | 56 | #include "stdio-util.h" |
8b43440b | 57 | #include "string-table.h" |
51517f9e | 58 | #include "strv.h" |
34658df2 | 59 | #include "tc.h" |
e4de7287 | 60 | #include "tmpfile-util.h" |
299ad32d | 61 | #include "udev-util.h" |
cf1d700d | 62 | #include "util.h" |
737f1405 | 63 | #include "vrf.h" |
fc2f9534 | 64 | |
3ca1fab7 | 65 | bool link_ipv4ll_enabled(Link *link) { |
b9d74c40 LP |
66 | assert(link); |
67 | ||
78c958f8 TG |
68 | if (link->flags & IFF_LOOPBACK) |
69 | return false; | |
70 | ||
71 | if (!link->network) | |
72 | return false; | |
73 | ||
500b96eb | 74 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
75 | return false; |
76 | ||
98d20a17 | 77 | if (STRPTR_IN_SET(link->kind, |
78 | "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti", | |
b0486c73 | 79 | "vti6", "nlmon", "xfrm", "bareudp")) |
a8f5bba6 JD |
80 | return false; |
81 | ||
f410d463 YW |
82 | /* L3 or L3S mode do not support ARP. */ |
83 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
84 | return false; | |
85 | ||
f2bfcdb9 YW |
86 | if (link->network->bond) |
87 | return false; | |
88 | ||
3ca1fab7 | 89 | return link->network->link_local & ADDRESS_FAMILY_IPV4; |
8bc17bb3 SS |
90 | } |
91 | ||
f8f2f880 | 92 | bool link_ipv6ll_enabled(Link *link) { |
b9d74c40 LP |
93 | assert(link); |
94 | ||
fa709992 LP |
95 | if (!socket_ipv6_is_supported()) |
96 | return false; | |
97 | ||
d0d6a4cd TG |
98 | if (link->flags & IFF_LOOPBACK) |
99 | return false; | |
100 | ||
101 | if (!link->network) | |
102 | return false; | |
103 | ||
500b96eb | 104 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
105 | return false; |
106 | ||
107 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) | |
a8f5bba6 JD |
108 | return false; |
109 | ||
f2bfcdb9 YW |
110 | if (link->network->bond) |
111 | return false; | |
112 | ||
e0ee46f2 | 113 | return link->network->link_local & ADDRESS_FAMILY_IPV6; |
78c958f8 TG |
114 | } |
115 | ||
5e0534f1 | 116 | bool link_ipv6_enabled(Link *link) { |
439689c6 SS |
117 | assert(link); |
118 | ||
119 | if (!socket_ipv6_is_supported()) | |
120 | return false; | |
121 | ||
b102cdca | 122 | if (link->network->bond) |
2b00a4e0 TY |
123 | return false; |
124 | ||
500b96eb | 125 | if (link->iftype == ARPHRD_CAN) |
af9ba57a YW |
126 | return false; |
127 | ||
4cef7fe3 | 128 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ |
adfeee49 YW |
129 | if (link_ipv6ll_enabled(link)) |
130 | return true; | |
131 | ||
132 | if (network_has_static_ipv6_configurations(link->network)) | |
133 | return true; | |
134 | ||
135 | return false; | |
439689c6 SS |
136 | } |
137 | ||
7191a57a YW |
138 | bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
139 | assert(link); | |
140 | ||
8e4b1b35 | 141 | if (!link->network) { |
7191a57a YW |
142 | if (!allow_unmanaged) |
143 | return false; | |
144 | ||
145 | return link_has_carrier(link); | |
146 | } | |
147 | ||
148 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) | |
149 | return false; | |
150 | ||
151 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) | |
152 | return false; | |
153 | ||
0fa8ee6c YW |
154 | if (link->set_link_messages > 0) |
155 | return false; | |
156 | ||
71a754f7 YW |
157 | if (!link->stacked_netdevs_created) |
158 | return false; | |
71a754f7 | 159 | |
112a0972 YW |
160 | if (!link->activated) |
161 | return false; | |
112a0972 | 162 | |
7191a57a YW |
163 | return true; |
164 | } | |
165 | ||
15761549 YW |
166 | void link_ntp_settings_clear(Link *link) { |
167 | link->ntp = strv_free(link->ntp); | |
168 | } | |
169 | ||
170 | void link_dns_settings_clear(Link *link) { | |
f5fbe71d | 171 | if (link->n_dns != UINT_MAX) |
e77bd3fd YW |
172 | for (unsigned i = 0; i < link->n_dns; i++) |
173 | in_addr_full_free(link->dns[i]); | |
15761549 | 174 | link->dns = mfree(link->dns); |
f5fbe71d | 175 | link->n_dns = UINT_MAX; |
15761549 | 176 | |
6e4571f0 YW |
177 | link->search_domains = ordered_set_free(link->search_domains); |
178 | link->route_domains = ordered_set_free(link->route_domains); | |
15761549 YW |
179 | |
180 | link->dns_default_route = -1; | |
181 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
182 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
183 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
184 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
185 | ||
186 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
187 | } | |
188 | ||
1a6bb31f YW |
189 | static void link_free_engines(Link *link) { |
190 | if (!link) | |
191 | return; | |
192 | ||
193 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
194 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); | |
195 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
1c494872 | 196 | link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd); |
1a6bb31f YW |
197 | |
198 | link->lldp = sd_lldp_unref(link->lldp); | |
1c494872 | 199 | link_lldp_emit_stop(link); |
1a6bb31f YW |
200 | |
201 | ndisc_flush(link); | |
202 | ||
203 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); | |
204 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
1633c457 | 205 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
1a6bb31f YW |
206 | link->ndisc = sd_ndisc_unref(link->ndisc); |
207 | link->radv = sd_radv_unref(link->radv); | |
7abe175c YW |
208 | |
209 | ipv4_dad_unref(link); | |
1a6bb31f YW |
210 | } |
211 | ||
8301aa0b | 212 | static Link *link_free(Link *link) { |
8301aa0b | 213 | assert(link); |
f579559b | 214 | |
15761549 YW |
215 | link_ntp_settings_clear(link); |
216 | link_dns_settings_clear(link); | |
217 | ||
8eec0b9d YW |
218 | link->routes = set_free(link->routes); |
219 | link->routes_foreign = set_free(link->routes_foreign); | |
6e537f62 YW |
220 | link->dhcp_routes = set_free(link->dhcp_routes); |
221 | link->dhcp_routes_old = set_free(link->dhcp_routes_old); | |
1633c457 YW |
222 | link->dhcp6_routes = set_free(link->dhcp6_routes); |
223 | link->dhcp6_routes_old = set_free(link->dhcp6_routes_old); | |
224 | link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes); | |
225 | link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old); | |
69203fba | 226 | link->ndisc_routes = set_free(link->ndisc_routes); |
adda1ed9 | 227 | |
8eec0b9d YW |
228 | link->nexthops = set_free(link->nexthops); |
229 | link->nexthops_foreign = set_free(link->nexthops_foreign); | |
c16c7808 | 230 | |
8eec0b9d YW |
231 | link->neighbors = set_free(link->neighbors); |
232 | link->neighbors_foreign = set_free(link->neighbors_foreign); | |
d1bdafd2 | 233 | |
8eec0b9d YW |
234 | link->addresses = set_free(link->addresses); |
235 | link->addresses_foreign = set_free(link->addresses_foreign); | |
aa651e88 | 236 | link->pool_addresses = set_free(link->pool_addresses); |
e5526518 | 237 | link->static_addresses = set_free(link->static_addresses); |
1633c457 YW |
238 | link->dhcp6_addresses = set_free(link->dhcp6_addresses); |
239 | link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old); | |
240 | link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses); | |
241 | link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old); | |
69203fba | 242 | link->ndisc_addresses = set_free(link->ndisc_addresses); |
adda1ed9 | 243 | |
4b409e85 YW |
244 | link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes); |
245 | ||
1a6bb31f | 246 | link_free_engines(link); |
49699bac | 247 | |
c166a070 | 248 | free(link->ifname); |
572b21d9 | 249 | strv_free(link->alternative_names); |
ceac4078 | 250 | free(link->kind); |
8d968fdd | 251 | free(link->ssid); |
c643bda5 | 252 | free(link->driver); |
6cad256d | 253 | |
a34e58d4 YW |
254 | unlink_and_free(link->lease_file); |
255 | unlink_and_free(link->lldp_file); | |
256 | unlink_and_free(link->state_file); | |
c166a070 | 257 | |
51517f9e | 258 | sd_device_unref(link->sd_device); |
b5db00e5 | 259 | |
0d4ad91d | 260 | hashmap_free(link->bound_to_links); |
0d4ad91d AR |
261 | hashmap_free(link->bound_by_links); |
262 | ||
5f707e12 | 263 | set_free_with_destructor(link->slaves, link_unref); |
033295c1 | 264 | |
c9c908a6 YW |
265 | network_unref(link->network); |
266 | ||
8301aa0b | 267 | return mfree(link); |
14b746f7 TG |
268 | } |
269 | ||
8301aa0b | 270 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
14b746f7 | 271 | |
11a7f229 TG |
272 | int link_get(Manager *m, int ifindex, Link **ret) { |
273 | Link *link; | |
11a7f229 TG |
274 | |
275 | assert(m); | |
e856ed00 | 276 | assert(ifindex > 0); |
11a7f229 | 277 | |
ae06ab10 | 278 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); |
11a7f229 TG |
279 | if (!link) |
280 | return -ENODEV; | |
281 | ||
0b54c870 YW |
282 | if (ret) |
283 | *ret = link; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | int link_get_by_name(Manager *m, const char *ifname, Link **ret) { | |
288 | Link *link; | |
289 | ||
290 | assert(m); | |
291 | assert(ifname); | |
11a7f229 | 292 | |
0b54c870 YW |
293 | link = hashmap_get(m->links_by_name, ifname); |
294 | if (!link) | |
295 | return -ENODEV; | |
296 | ||
297 | if (ret) | |
298 | *ret = link; | |
11a7f229 TG |
299 | return 0; |
300 | } | |
301 | ||
81357285 YW |
302 | int link_get_master(Link *link, Link **ret) { |
303 | assert(link); | |
304 | assert(link->manager); | |
305 | assert(ret); | |
306 | ||
307 | if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex) | |
308 | return -ENODEV; | |
309 | ||
310 | return link_get(link->manager, link->master_ifindex, ret); | |
311 | } | |
312 | ||
af9ba57a | 313 | void link_set_state(Link *link, LinkState state) { |
e331e246 TG |
314 | assert(link); |
315 | ||
316 | if (link->state == state) | |
317 | return; | |
318 | ||
0beb9542 YW |
319 | log_link_debug(link, "State changed: %s -> %s", |
320 | link_state_to_string(link->state), | |
321 | link_state_to_string(state)); | |
322 | ||
e331e246 TG |
323 | link->state = state; |
324 | ||
325 | link_send_changed(link, "AdministrativeState", NULL); | |
9092113d | 326 | link_dirty(link); |
e331e246 TG |
327 | } |
328 | ||
2a99eed0 | 329 | int link_stop_engines(Link *link, bool may_keep_dhcp) { |
111bb8f9 TG |
330 | int r = 0, k; |
331 | ||
332 | assert(link); | |
333 | assert(link->manager); | |
334 | assert(link->manager->event); | |
335 | ||
80060352 ZJS |
336 | bool keep_dhcp = may_keep_dhcp && |
337 | link->network && | |
338 | (link->manager->restarting || | |
339 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
340 | ||
84add3cd | 341 | if (!keep_dhcp) { |
111bb8f9 | 342 | k = sd_dhcp_client_stop(link->dhcp_client); |
6a7a4e4d | 343 | if (k < 0) |
36c7d709 | 344 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
111bb8f9 TG |
345 | } |
346 | ||
84add3cd YW |
347 | k = sd_ipv4acd_stop(link->dhcp_acd); |
348 | if (k < 0) | |
349 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m"); | |
a7df5cae | 350 | |
2a99eed0 YW |
351 | k = sd_dhcp_server_stop(link->dhcp_server); |
352 | if (k < 0) | |
353 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); | |
354 | ||
9cc65242 YW |
355 | k = sd_lldp_stop(link->lldp); |
356 | if (k < 0) | |
357 | r = log_link_warning_errno(link, k, "Could not stop LLDP: %m"); | |
358 | ||
84add3cd YW |
359 | k = sd_ipv4ll_stop(link->ipv4ll); |
360 | if (k < 0) | |
361 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
dd43110f | 362 | |
490ccbd5 | 363 | k = ipv4_dad_stop(link); |
2488e4d9 YW |
364 | if (k < 0) |
365 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); | |
051e77ca | 366 | |
84add3cd YW |
367 | k = sd_dhcp6_client_stop(link->dhcp6_client); |
368 | if (k < 0) | |
369 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
4138fb2c | 370 | |
2ffd6d73 YW |
371 | k = dhcp6_pd_remove(link); |
372 | if (k < 0) | |
373 | r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); | |
1633c457 | 374 | |
84add3cd YW |
375 | k = sd_ndisc_stop(link->ndisc); |
376 | if (k < 0) | |
377 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
4138fb2c | 378 | |
84add3cd YW |
379 | k = sd_radv_stop(link->radv); |
380 | if (k < 0) | |
381 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
7465dd22 | 382 | |
7272b25e | 383 | link_lldp_emit_stop(link); |
111bb8f9 TG |
384 | return r; |
385 | } | |
386 | ||
b22d8a00 | 387 | void link_enter_failed(Link *link) { |
ef1ba606 | 388 | assert(link); |
f882c247 | 389 | |
370e9930 | 390 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
391 | return; |
392 | ||
6a7a4e4d | 393 | log_link_warning(link, "Failed"); |
449f7554 | 394 | |
e331e246 | 395 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 396 | |
2a99eed0 | 397 | (void) link_stop_engines(link, false); |
f882c247 TG |
398 | } |
399 | ||
6accfd31 DA |
400 | void link_check_ready(Link *link) { |
401 | Address *a; | |
6accfd31 DA |
402 | |
403 | assert(link); | |
404 | ||
5f58af25 YW |
405 | if (link->state == LINK_STATE_CONFIGURED) |
406 | return; | |
407 | ||
d19b9939 YW |
408 | if (link->state != LINK_STATE_CONFIGURING) |
409 | return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
6accfd31 DA |
410 | |
411 | if (!link->network) | |
a7f07cbe | 412 | return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__); |
6accfd31 | 413 | |
7558f9e7 YW |
414 | if (!link->tc_configured) |
415 | return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
600b7898 | 416 | |
a7f07cbe YW |
417 | if (link->set_link_messages > 0) |
418 | return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__); | |
419 | ||
420 | if (!link->activated) | |
421 | return (void) log_link_debug(link, "%s(): link is not activated.", __func__); | |
422 | ||
7558f9e7 YW |
423 | if (link->iftype == ARPHRD_CAN) { |
424 | /* let's shortcut things for CAN which doesn't need most of checks below. */ | |
425 | link_set_state(link, LINK_STATE_CONFIGURED); | |
426 | return; | |
427 | } | |
428 | ||
76c5a0f2 | 429 | if (!link->static_addresses_configured) |
d19b9939 | 430 | return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
6accfd31 | 431 | |
90e74a66 | 432 | SET_FOREACH(a, link->addresses) |
39373cb9 YW |
433 | if (!address_is_ready(a)) { |
434 | _cleanup_free_ char *str = NULL; | |
435 | ||
5380707a YW |
436 | (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str); |
437 | return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str)); | |
39373cb9 | 438 | } |
6aa5773b | 439 | |
354bc760 YW |
440 | if (!link->static_address_labels_configured) |
441 | return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__); | |
442 | ||
e5b35bf6 YW |
443 | if (!link->static_bridge_fdb_configured) |
444 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
445 | ||
ff9e0783 YW |
446 | if (!link->static_bridge_mdb_configured) |
447 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
448 | ||
fdeba3f5 YW |
449 | if (!link->static_ipv6_proxy_ndp_configured) |
450 | return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__); | |
451 | ||
40ca350e YW |
452 | if (!link->static_neighbors_configured) |
453 | return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
454 | ||
d19b9939 YW |
455 | if (!link->static_nexthops_configured) |
456 | return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
c16c7808 | 457 | |
76c5a0f2 YW |
458 | if (!link->static_routes_configured) |
459 | return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
460 | ||
0e5ef6be | 461 | if (!link->static_routing_policy_rules_configured) |
d19b9939 | 462 | return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
6accfd31 | 463 | |
d19b9939 YW |
464 | if (!link->sr_iov_configured) |
465 | return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
518cd6b5 | 466 | |
463797c1 | 467 | if (link_has_carrier(link) || !link->network->configure_without_carrier) { |
50550722 YW |
468 | bool has_ndisc_address = false; |
469 | NDiscAddress *n; | |
6accfd31 | 470 | |
94876904 YW |
471 | if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address)) |
472 | return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); | |
6accfd31 | 473 | |
90e74a66 | 474 | SET_FOREACH(n, link->ndisc_addresses) |
50550722 YW |
475 | if (!n->marked) { |
476 | has_ndisc_address = true; | |
477 | break; | |
478 | } | |
479 | ||
8cd37e43 | 480 | if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) && |
50550722 | 481 | !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address && |
0d0799da YW |
482 | !link->ipv4ll_address_configured) |
483 | /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ | |
484 | return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__); | |
659ad3a0 | 485 | |
0d0799da YW |
486 | if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || |
487 | link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) { | |
39373cb9 YW |
488 | if (!link->dhcp4_configured && |
489 | !(link->dhcp6_address_configured && link->dhcp6_route_configured) && | |
490 | !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) && | |
d98c546d | 491 | !(link->ndisc_addresses_configured && link->ndisc_routes_configured) && |
0d0799da YW |
492 | !link->ipv4ll_address_configured) |
493 | /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */ | |
d19b9939 | 494 | return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); |
39373cb9 | 495 | |
0d0799da | 496 | log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s", |
39373cb9 YW |
497 | __func__, |
498 | yes_no(link->dhcp4_configured), | |
0d0799da | 499 | yes_no(link->ipv4ll_address_configured), |
39373cb9 YW |
500 | yes_no(link->dhcp6_address_configured), |
501 | yes_no(link->dhcp6_route_configured), | |
502 | yes_no(link->dhcp6_pd_address_configured), | |
503 | yes_no(link->dhcp6_pd_route_configured), | |
d98c546d YW |
504 | yes_no(link->ndisc_addresses_configured), |
505 | yes_no(link->ndisc_routes_configured)); | |
39373cb9 | 506 | } |
463797c1 | 507 | } |
6accfd31 | 508 | |
29836c16 | 509 | link_set_state(link, LINK_STATE_CONFIGURED); |
6accfd31 DA |
510 | } |
511 | ||
97108953 | 512 | static int link_request_static_configs(Link *link) { |
f882c247 TG |
513 | int r; |
514 | ||
515 | assert(link); | |
516 | assert(link->network); | |
f5be5601 | 517 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 518 | |
354bc760 | 519 | r = link_request_static_addresses(link); |
0e5ef6be YW |
520 | if (r < 0) |
521 | return r; | |
522 | ||
354bc760 | 523 | r = link_request_static_address_labels(link); |
f3ef324d YW |
524 | if (r < 0) |
525 | return r; | |
e4a71bf3 | 526 | |
e5b35bf6 YW |
527 | r = link_request_static_bridge_fdb(link); |
528 | if (r < 0) | |
529 | return r; | |
530 | ||
9a038aac YW |
531 | r = link_request_static_bridge_mdb(link); |
532 | if (r < 0) | |
533 | return r; | |
534 | ||
fdeba3f5 YW |
535 | r = link_request_static_ipv6_proxy_ndp_addresses(link); |
536 | if (r < 0) | |
537 | return r; | |
538 | ||
40ca350e | 539 | r = link_request_static_neighbors(link); |
682c65b0 YW |
540 | if (r < 0) |
541 | return r; | |
bd6379ec | 542 | |
76c5a0f2 | 543 | r = link_request_static_nexthops(link, false); |
fe2bc17c YW |
544 | if (r < 0) |
545 | return r; | |
f882c247 | 546 | |
76c5a0f2 YW |
547 | r = link_request_static_routes(link, false); |
548 | if (r < 0) | |
549 | return r; | |
550 | ||
551 | r = link_request_static_routing_policy_rules(link); | |
5ae0fb7f YW |
552 | if (r < 0) |
553 | return r; | |
d4cdbea5 | 554 | |
f882c247 TG |
555 | return 0; |
556 | } | |
557 | ||
1187fc33 YW |
558 | static int link_request_stacked_netdevs(Link *link) { |
559 | NetDev *netdev; | |
e16e4b3b DS |
560 | int r; |
561 | ||
562 | assert(link); | |
563 | ||
1187fc33 YW |
564 | link->stacked_netdevs_created = false; |
565 | link->stacked_netdevs_after_configured_created = false; | |
e16e4b3b | 566 | |
1187fc33 YW |
567 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
568 | r = link_request_to_crate_stacked_netdev(link, netdev); | |
569 | if (r < 0) | |
570 | return r; | |
571 | } | |
e16e4b3b | 572 | |
1187fc33 YW |
573 | if (link->create_stacked_netdev_messages == 0) |
574 | link->stacked_netdevs_created = true; | |
575 | if (link->create_stacked_netdev_after_configured_messages == 0) | |
576 | link->stacked_netdevs_after_configured_created = true; | |
e16e4b3b DS |
577 | |
578 | return 0; | |
579 | } | |
580 | ||
8566df79 | 581 | static int link_acquire_dynamic_ipv6_conf(Link *link) { |
e7ab854c TG |
582 | int r; |
583 | ||
584 | assert(link); | |
585 | ||
086b8853 | 586 | if (link->radv) { |
7465dd22 | 587 | assert(link->radv); |
94876904 | 588 | assert(in6_addr_is_link_local(&link->ipv6ll_address)); |
7465dd22 PF |
589 | |
590 | log_link_debug(link, "Starting IPv6 Router Advertisements"); | |
591 | ||
fd3ef936 YW |
592 | r = radv_emit_dns(link); |
593 | if (r < 0) | |
594 | return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m"); | |
595 | ||
7465dd22 PF |
596 | r = sd_radv_start(link->radv); |
597 | if (r < 0 && r != -EBUSY) | |
598 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); | |
599 | } | |
600 | ||
294f129b YW |
601 | r = ndisc_start(link); |
602 | if (r < 0) | |
603 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
cd305af1 | 604 | |
294f129b YW |
605 | r = dhcp6_start(link); |
606 | if (r < 0) | |
607 | return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); | |
cd305af1 | 608 | |
1633c457 YW |
609 | r = dhcp6_request_prefix_delegation(link); |
610 | if (r < 0) | |
611 | return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m"); | |
10752343 | 612 | |
e7ab854c TG |
613 | return 0; |
614 | } | |
615 | ||
8566df79 | 616 | static int link_acquire_dynamic_ipv4_conf(Link *link) { |
ff254138 TG |
617 | int r; |
618 | ||
619 | assert(link); | |
ff254138 TG |
620 | assert(link->manager); |
621 | assert(link->manager->event); | |
622 | ||
0107b769 | 623 | if (link->dhcp_client) { |
294f129b | 624 | r = dhcp4_start(link); |
0107b769 | 625 | if (r < 0) |
294f129b | 626 | return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
0107b769 | 627 | |
0b4b66cc | 628 | } else if (link->ipv4ll) { |
6a7a4e4d | 629 | log_link_debug(link, "Acquiring IPv4 link-local address"); |
5c1d3fc9 UTL |
630 | |
631 | r = sd_ipv4ll_start(link->ipv4ll); | |
6a7a4e4d LP |
632 | if (r < 0) |
633 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
5c1d3fc9 UTL |
634 | } |
635 | ||
ab486ef4 YW |
636 | if (link->dhcp_server) { |
637 | r = sd_dhcp_server_start(link->dhcp_server); | |
638 | if (r < 0) | |
639 | return log_link_warning_errno(link, r, "Could not start DHCP server: %m"); | |
640 | } | |
641 | ||
6fc25497 SS |
642 | return 0; |
643 | } | |
644 | ||
8566df79 | 645 | static int link_acquire_dynamic_conf(Link *link) { |
6fc25497 SS |
646 | int r; |
647 | ||
648 | assert(link); | |
649 | ||
8566df79 | 650 | r = link_acquire_dynamic_ipv4_conf(link); |
6fc25497 SS |
651 | if (r < 0) |
652 | return r; | |
653 | ||
94876904 | 654 | if (in6_addr_is_set(&link->ipv6ll_address)) { |
8566df79 | 655 | r = link_acquire_dynamic_ipv6_conf(link); |
6fc25497 SS |
656 | if (r < 0) |
657 | return r; | |
658 | } | |
659 | ||
2ffd6d73 YW |
660 | r = link_lldp_emit_start(link); |
661 | if (r < 0) | |
662 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
8e1ad1ea | 663 | |
ff254138 TG |
664 | return 0; |
665 | } | |
666 | ||
0c9ee5d5 YW |
667 | int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { |
668 | int r; | |
deb2e523 | 669 | |
0c9ee5d5 | 670 | assert(link); |
deb2e523 | 671 | |
0c9ee5d5 | 672 | log_link_info(link, "Gained IPv6LL"); |
deb2e523 | 673 | |
0c9ee5d5 YW |
674 | link->ipv6ll_address = *address; |
675 | link_check_ready(link); | |
676 | ||
677 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { | |
678 | r = link_acquire_dynamic_ipv6_conf(link); | |
679 | if (r < 0) { | |
680 | link_enter_failed(link); | |
681 | return r; | |
682 | } | |
683 | } | |
684 | ||
685 | return 0; | |
deb2e523 TG |
686 | } |
687 | ||
112a0972 | 688 | int link_handle_bound_to_list(Link *link) { |
0d4ad91d AR |
689 | bool required_up = false; |
690 | bool link_is_up = false; | |
852a3916 | 691 | Link *l; |
0d4ad91d AR |
692 | |
693 | assert(link); | |
694 | ||
ad82f0c3 YW |
695 | /* If at least one interface in bound_to_links has carrier, then make this interface up. |
696 | * If all interfaces in bound_to_links do not, then make this interface down. */ | |
697 | ||
0d4ad91d AR |
698 | if (hashmap_isempty(link->bound_to_links)) |
699 | return 0; | |
700 | ||
701 | if (link->flags & IFF_UP) | |
702 | link_is_up = true; | |
703 | ||
852a3916 | 704 | HASHMAP_FOREACH(l, link->bound_to_links) |
0d4ad91d AR |
705 | if (link_has_carrier(l)) { |
706 | required_up = true; | |
707 | break; | |
708 | } | |
709 | ||
852a3916 | 710 | if (!required_up && link_is_up) |
68f52063 | 711 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
852a3916 | 712 | if (required_up && !link_is_up) |
68f52063 | 713 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0d4ad91d AR |
714 | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static int link_handle_bound_by_list(Link *link) { | |
0d4ad91d AR |
719 | Link *l; |
720 | int r; | |
721 | ||
722 | assert(link); | |
723 | ||
ad82f0c3 YW |
724 | /* Update up or down state of interfaces which depend on this interface's carrier state. */ |
725 | ||
0d4ad91d AR |
726 | if (hashmap_isempty(link->bound_by_links)) |
727 | return 0; | |
728 | ||
852a3916 | 729 | HASHMAP_FOREACH(l, link->bound_by_links) { |
0d4ad91d AR |
730 | r = link_handle_bound_to_list(l); |
731 | if (r < 0) | |
732 | return r; | |
733 | } | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
739 | int r; | |
740 | ||
741 | assert(link); | |
742 | assert(carrier); | |
743 | ||
744 | if (link == carrier) | |
745 | return 0; | |
746 | ||
747 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
748 | return 0; | |
749 | ||
190b3b5c | 750 | r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
0d4ad91d AR |
751 | if (r < 0) |
752 | return r; | |
753 | ||
9092113d YW |
754 | link_dirty(link); |
755 | ||
0d4ad91d AR |
756 | return 0; |
757 | } | |
758 | ||
759 | static int link_new_bound_by_list(Link *link) { | |
760 | Manager *m; | |
761 | Link *carrier; | |
0d4ad91d | 762 | int r; |
0d4ad91d AR |
763 | |
764 | assert(link); | |
765 | assert(link->manager); | |
766 | ||
767 | m = link->manager; | |
768 | ||
90e74a66 | 769 | HASHMAP_FOREACH(carrier, m->links) { |
0d4ad91d AR |
770 | if (!carrier->network) |
771 | continue; | |
772 | ||
773 | if (strv_isempty(carrier->network->bind_carrier)) | |
774 | continue; | |
775 | ||
191a3f16 | 776 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
0d4ad91d AR |
777 | r = link_put_carrier(link, carrier, &link->bound_by_links); |
778 | if (r < 0) | |
779 | return r; | |
0d4ad91d AR |
780 | } |
781 | } | |
782 | ||
90e74a66 | 783 | HASHMAP_FOREACH(carrier, link->bound_by_links) { |
0d4ad91d AR |
784 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
785 | if (r < 0) | |
786 | return r; | |
0d4ad91d AR |
787 | } |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | static int link_new_bound_to_list(Link *link) { | |
793 | Manager *m; | |
794 | Link *carrier; | |
0d4ad91d | 795 | int r; |
0d4ad91d AR |
796 | |
797 | assert(link); | |
798 | assert(link->manager); | |
799 | ||
800 | if (!link->network) | |
801 | return 0; | |
802 | ||
803 | if (strv_isempty(link->network->bind_carrier)) | |
804 | return 0; | |
805 | ||
806 | m = link->manager; | |
807 | ||
852a3916 | 808 | HASHMAP_FOREACH(carrier, m->links) { |
191a3f16 | 809 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
0d4ad91d AR |
810 | r = link_put_carrier(link, carrier, &link->bound_to_links); |
811 | if (r < 0) | |
812 | return r; | |
0d4ad91d AR |
813 | } |
814 | } | |
815 | ||
852a3916 | 816 | HASHMAP_FOREACH(carrier, link->bound_to_links) { |
0d4ad91d AR |
817 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
818 | if (r < 0) | |
819 | return r; | |
0d4ad91d AR |
820 | } |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static int link_new_carrier_maps(Link *link) { | |
826 | int r; | |
827 | ||
828 | r = link_new_bound_by_list(link); | |
829 | if (r < 0) | |
830 | return r; | |
831 | ||
832 | r = link_handle_bound_by_list(link); | |
833 | if (r < 0) | |
834 | return r; | |
835 | ||
836 | r = link_new_bound_to_list(link); | |
837 | if (r < 0) | |
838 | return r; | |
839 | ||
852a3916 | 840 | return link_handle_bound_to_list(link); |
0d4ad91d AR |
841 | } |
842 | ||
843 | static void link_free_bound_to_list(Link *link) { | |
9092113d | 844 | bool updated = false; |
0d4ad91d | 845 | Link *bound_to; |
0d4ad91d | 846 | |
9092113d YW |
847 | assert(link); |
848 | ||
849 | while ((bound_to = hashmap_steal_first(link->bound_to_links))) { | |
850 | updated = true; | |
0d4ad91d AR |
851 | |
852 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
84de38c5 | 853 | link_dirty(bound_to); |
0d4ad91d AR |
854 | } |
855 | ||
9092113d YW |
856 | if (updated) |
857 | link_dirty(link); | |
0d4ad91d AR |
858 | } |
859 | ||
860 | static void link_free_bound_by_list(Link *link) { | |
9092113d | 861 | bool updated = false; |
0d4ad91d | 862 | Link *bound_by; |
0d4ad91d | 863 | |
9092113d YW |
864 | assert(link); |
865 | ||
866 | while ((bound_by = hashmap_steal_first(link->bound_by_links))) { | |
867 | updated = true; | |
0d4ad91d AR |
868 | |
869 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
84de38c5 | 870 | link_dirty(bound_by); |
0d4ad91d AR |
871 | link_handle_bound_to_list(bound_by); |
872 | } | |
873 | } | |
874 | ||
9092113d YW |
875 | if (updated) |
876 | link_dirty(link); | |
0d4ad91d AR |
877 | } |
878 | ||
879 | static void link_free_carrier_maps(Link *link) { | |
0d4ad91d AR |
880 | assert(link); |
881 | ||
9092113d YW |
882 | link_free_bound_to_list(link); |
883 | link_free_bound_by_list(link); | |
0d4ad91d AR |
884 | } |
885 | ||
81357285 | 886 | static int link_append_to_master(Link *link) { |
5f707e12 YW |
887 | Link *master; |
888 | int r; | |
889 | ||
890 | assert(link); | |
5f707e12 | 891 | |
81357285 YW |
892 | /* - The link may have no master. |
893 | * - RTM_NEWLINK message about master interface may not be received yet. */ | |
894 | if (link_get_master(link, &master) < 0) | |
895 | return 0; | |
5f707e12 | 896 | |
de7fef4b | 897 | r = set_ensure_put(&master->slaves, NULL, link); |
38288f0b | 898 | if (r <= 0) |
5f707e12 YW |
899 | return r; |
900 | ||
901 | link_ref(link); | |
902 | return 0; | |
903 | } | |
904 | ||
81357285 | 905 | static void link_drop_from_master(Link *link) { |
5f707e12 YW |
906 | Link *master; |
907 | ||
908 | assert(link); | |
909 | ||
81357285 | 910 | if (!link->manager) |
5f707e12 YW |
911 | return; |
912 | ||
81357285 | 913 | if (link_get_master(link, &master) < 0) |
5f707e12 YW |
914 | return; |
915 | ||
916 | link_unref(set_remove(master->slaves, link)); | |
917 | } | |
918 | ||
56001f02 YW |
919 | static void link_drop_requests(Link *link) { |
920 | Request *req; | |
921 | ||
922 | assert(link); | |
923 | assert(link->manager); | |
924 | ||
925 | ORDERED_SET_FOREACH(req, link->manager->request_queue) | |
926 | if (req->link == link) | |
927 | request_drop(req); | |
928 | } | |
929 | ||
cc2d7efc | 930 | static Link *link_drop(Link *link) { |
0b54c870 YW |
931 | char **n; |
932 | ||
63130eb3 | 933 | if (!link) |
cc2d7efc | 934 | return NULL; |
0d4ad91d | 935 | |
63130eb3 YW |
936 | assert(link->manager); |
937 | ||
0d4ad91d AR |
938 | link_set_state(link, LINK_STATE_LINGER); |
939 | ||
63130eb3 YW |
940 | /* Drop all references from other links and manager. Note that async netlink calls may have |
941 | * references to the link, and they will be dropped when we receive replies. */ | |
942 | ||
56001f02 YW |
943 | link_drop_requests(link); |
944 | ||
0d4ad91d AR |
945 | link_free_carrier_maps(link); |
946 | ||
81357285 | 947 | link_drop_from_master(link); |
5f707e12 | 948 | |
63130eb3 | 949 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
0d4ad91d | 950 | |
db2f8a2e | 951 | (void) unlink(link->state_file); |
63130eb3 YW |
952 | link_clean(link); |
953 | ||
0b54c870 YW |
954 | STRV_FOREACH(n, link->alternative_names) |
955 | hashmap_remove(link->manager->links_by_name, *n); | |
956 | ||
957 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
958 | ||
63130eb3 YW |
959 | /* The following must be called at last. */ |
960 | assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); | |
cc2d7efc | 961 | return link_unref(link); |
0d4ad91d AR |
962 | } |
963 | ||
5e5b137a | 964 | static int link_drop_foreign_config(Link *link) { |
0b81225e YW |
965 | int k, r; |
966 | ||
967 | assert(link); | |
968 | assert(link->manager); | |
5e5b137a | 969 | |
e36d601c | 970 | r = link_drop_foreign_routes(link); |
5e5b137a | 971 | |
e36d601c | 972 | k = link_drop_foreign_nexthops(link); |
0b81225e YW |
973 | if (k < 0 && r >= 0) |
974 | r = k; | |
975 | ||
e36d601c | 976 | k = link_drop_foreign_addresses(link); |
0b81225e YW |
977 | if (k < 0 && r >= 0) |
978 | r = k; | |
d1bdafd2 | 979 | |
e36d601c | 980 | k = link_drop_foreign_neighbors(link); |
25b82b6e YW |
981 | if (k < 0 && r >= 0) |
982 | r = k; | |
983 | ||
0b81225e YW |
984 | k = manager_drop_foreign_routing_policy_rules(link->manager); |
985 | if (k < 0 && r >= 0) | |
986 | r = k; | |
987 | ||
988 | return r; | |
5e5b137a TG |
989 | } |
990 | ||
3104883d | 991 | static int link_drop_config(Link *link) { |
0b81225e YW |
992 | int k, r; |
993 | ||
994 | assert(link); | |
995 | assert(link->manager); | |
3104883d | 996 | |
e36d601c | 997 | r = link_drop_routes(link); |
3104883d | 998 | |
e36d601c | 999 | k = link_drop_nexthops(link); |
0b81225e YW |
1000 | if (k < 0 && r >= 0) |
1001 | r = k; | |
d1bdafd2 | 1002 | |
e36d601c | 1003 | k = link_drop_addresses(link); |
0b81225e YW |
1004 | if (k < 0 && r >= 0) |
1005 | r = k; | |
1006 | ||
e36d601c | 1007 | k = link_drop_neighbors(link); |
25b82b6e YW |
1008 | if (k < 0 && r >= 0) |
1009 | r = k; | |
1010 | ||
0b81225e YW |
1011 | k = manager_drop_routing_policy_rules(link->manager, link); |
1012 | if (k < 0 && r >= 0) | |
1013 | r = k; | |
3104883d | 1014 | |
c69305ff LP |
1015 | ndisc_flush(link); |
1016 | ||
0b81225e | 1017 | return r; |
3104883d SS |
1018 | } |
1019 | ||
c3b94251 | 1020 | static int link_configure(Link *link) { |
4ecdcb07 YW |
1021 | int r; |
1022 | ||
ef1ba606 | 1023 | assert(link); |
b22d8a00 | 1024 | assert(link->network); |
bd08ce56 | 1025 | assert(link->state == LINK_STATE_INITIALIZED); |
a748b692 | 1026 | |
1187fc33 YW |
1027 | link_set_state(link, LINK_STATE_CONFIGURING); |
1028 | ||
34658df2 | 1029 | r = link_configure_traffic_control(link); |
4ecdcb07 YW |
1030 | if (r < 0) |
1031 | return r; | |
1032 | ||
7558f9e7 YW |
1033 | if (link->iftype == ARPHRD_CAN) { |
1034 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
1035 | r = link_request_to_set_can(link); | |
1036 | if (r < 0) | |
1037 | return r; | |
1038 | ||
1039 | return link_request_to_activate(link); | |
1040 | } | |
1041 | ||
518cd6b5 SS |
1042 | r = link_configure_sr_iov(link); |
1043 | if (r < 0) | |
1044 | return r; | |
1045 | ||
5e0534f1 | 1046 | r = link_set_sysctl(link); |
b69c3180 SS |
1047 | if (r < 0) |
1048 | return r; | |
8749cbcd | 1049 | |
a8e5e27c | 1050 | r = link_request_to_set_mac(link); |
e16e4b3b DS |
1051 | if (r < 0) |
1052 | return r; | |
1053 | ||
1187fc33 | 1054 | r = link_request_to_set_flags(link); |
e16e4b3b DS |
1055 | if (r < 0) |
1056 | return r; | |
1057 | ||
1187fc33 | 1058 | r = link_request_to_set_group(link); |
99d2baa2 SS |
1059 | if (r < 0) |
1060 | return r; | |
1061 | ||
1187fc33 YW |
1062 | r = link_configure_mtu(link); |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
1066 | r = link_request_to_set_addrgen_mode(link); | |
1067 | if (r < 0) | |
1068 | return r; | |
1069 | ||
1070 | r = link_request_to_set_master(link); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | r = link_request_stacked_netdevs(link); | |
1075 | if (r < 0) | |
1076 | return r; | |
1077 | ||
1078 | r = link_request_to_set_bond(link); | |
1079 | if (r < 0) | |
1080 | return r; | |
1081 | ||
1082 | r = link_request_to_set_bridge(link); | |
1083 | if (r < 0) | |
1084 | return r; | |
1085 | ||
1086 | r = link_request_to_set_bridge_vlan(link); | |
1087 | if (r < 0) | |
1088 | return r; | |
1089 | ||
1090 | r = link_request_to_activate(link); | |
89fe6535 SS |
1091 | if (r < 0) |
1092 | return r; | |
1093 | ||
2ffd6d73 YW |
1094 | r = ipv4ll_configure(link); |
1095 | if (r < 0) | |
1096 | return r; | |
64b21ece | 1097 | |
2ffd6d73 YW |
1098 | r = dhcp4_configure(link); |
1099 | if (r < 0) | |
1100 | return r; | |
eb34d4af | 1101 | |
2ffd6d73 YW |
1102 | r = dhcp6_configure(link); |
1103 | if (r < 0) | |
1104 | return r; | |
f5a8c43f | 1105 | |
2ffd6d73 YW |
1106 | r = ndisc_configure(link); |
1107 | if (r < 0) | |
1108 | return r; | |
4138fb2c | 1109 | |
1d28a3cf YW |
1110 | r = link_request_dhcp_server(link); |
1111 | if (r < 0) | |
1112 | return r; | |
1113 | ||
086b8853 YW |
1114 | r = radv_configure(link); |
1115 | if (r < 0) | |
1116 | return r; | |
7465dd22 | 1117 | |
2ffd6d73 YW |
1118 | r = link_lldp_rx_configure(link); |
1119 | if (r < 0) | |
1120 | return r; | |
ce43e484 | 1121 | |
4c649652 DS |
1122 | /* Drop foreign config, but ignore loopback or critical devices. |
1123 | * We do not want to remove loopback address or addresses used for root NFS. */ | |
1124 | if (!(link->flags & IFF_LOOPBACK) && | |
1125 | link->network->keep_configuration != KEEP_CONFIGURATION_YES) { | |
1126 | r = link_drop_foreign_config(link); | |
1127 | if (r < 0) | |
1128 | return r; | |
1129 | } | |
1130 | ||
1187fc33 YW |
1131 | r = link_request_static_configs(link); |
1132 | if (r < 0) | |
1133 | return r; | |
1134 | ||
1135 | if (!link_has_carrier(link)) | |
1136 | return 0; | |
1137 | ||
1138 | return link_acquire_dynamic_conf(link); | |
505f8da7 TG |
1139 | } |
1140 | ||
170e88c8 YW |
1141 | static int link_get_network(Link *link, Network **ret) { |
1142 | Network *network; | |
1a3caa49 | 1143 | int r; |
170e88c8 YW |
1144 | |
1145 | assert(link); | |
1146 | assert(link->manager); | |
1147 | assert(ret); | |
1148 | ||
1149 | ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { | |
1150 | bool warn = false; | |
1151 | ||
1a3caa49 | 1152 | r = net_match_config( |
170e88c8 YW |
1153 | &network->match, |
1154 | link->sd_device, | |
1155 | &link->hw_addr.addr.ether, | |
1156 | &link->permanent_mac, | |
1157 | link->driver, | |
1158 | link->iftype, | |
1159 | link->ifname, | |
1160 | link->alternative_names, | |
1161 | link->wlan_iftype, | |
1162 | link->ssid, | |
1a3caa49 YW |
1163 | &link->bssid); |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | if (r == 0) | |
170e88c8 YW |
1167 | continue; |
1168 | ||
1169 | if (network->match.ifname && link->sd_device) { | |
1170 | uint8_t name_assign_type = NET_NAME_UNKNOWN; | |
1171 | const char *attr; | |
1172 | ||
1173 | if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0) | |
1174 | (void) safe_atou8(attr, &name_assign_type); | |
1175 | ||
1176 | warn = name_assign_type == NET_NAME_ENUM; | |
1177 | } | |
1178 | ||
1179 | log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, | |
1180 | "found matching network '%s'%s.", | |
1181 | network->filename, | |
1182 | warn ? ", based on potentially unpredictable interface name" : ""); | |
1183 | ||
1184 | if (network->unmanaged) | |
1185 | return -ENOENT; | |
1186 | ||
1187 | *ret = network; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | return -ENOENT; | |
1192 | } | |
1193 | ||
5a1860f7 | 1194 | static int link_reconfigure_internal(Link *link, bool force) { |
ad932b15 YW |
1195 | Network *network; |
1196 | int r; | |
1197 | ||
5a1860f7 | 1198 | assert(link); |
572b21d9 | 1199 | |
170e88c8 | 1200 | r = link_get_network(link, &network); |
ad932b15 | 1201 | if (r == -ENOENT) { |
29836c16 | 1202 | link_set_state(link, LINK_STATE_UNMANAGED); |
ad932b15 | 1203 | return 0; |
170e88c8 YW |
1204 | } |
1205 | if (r < 0) | |
ad932b15 YW |
1206 | return r; |
1207 | ||
99b8517c | 1208 | if (link->network == network && !force) |
ad932b15 YW |
1209 | return 0; |
1210 | ||
1211 | log_link_info(link, "Re-configuring with %s", network->filename); | |
1212 | ||
1213 | /* Dropping old .network file */ | |
2a99eed0 | 1214 | r = link_stop_engines(link, false); |
572b21d9 | 1215 | if (r < 0) |
ad932b15 | 1216 | return r; |
ad932b15 | 1217 | |
19d9a5ad YW |
1218 | link_drop_requests(link); |
1219 | ||
ad932b15 YW |
1220 | r = link_drop_config(link); |
1221 | if (r < 0) | |
1222 | return r; | |
1223 | ||
2c7b826d | 1224 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
942cf4b8 | 1225 | log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
ad932b15 YW |
1226 | r = link_drop_foreign_config(link); |
1227 | if (r < 0) | |
1228 | return r; | |
1229 | } | |
1230 | ||
1231 | link_free_carrier_maps(link); | |
1232 | link_free_engines(link); | |
1233 | link->network = network_unref(link->network); | |
59c31eba | 1234 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
ad932b15 YW |
1235 | |
1236 | /* Then, apply new .network file */ | |
9092113d | 1237 | link->network = network_ref(network); |
b156a95d | 1238 | link_update_operstate(link, true); |
9092113d | 1239 | link_dirty(link); |
ad932b15 YW |
1240 | |
1241 | r = link_new_carrier_maps(link); | |
1242 | if (r < 0) | |
1243 | return r; | |
1244 | ||
1245 | link_set_state(link, LINK_STATE_INITIALIZED); | |
61135582 | 1246 | link->activated = false; |
ad932b15 | 1247 | |
ad932b15 YW |
1248 | r = link_configure(link); |
1249 | if (r < 0) | |
1250 | return r; | |
1251 | ||
0e397560 | 1252 | return 1; |
ad932b15 YW |
1253 | } |
1254 | ||
5a1860f7 | 1255 | static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) { |
572b21d9 YW |
1256 | int r; |
1257 | ||
5a1860f7 YW |
1258 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state"); |
1259 | if (r <= 0) | |
1260 | return r; | |
1261 | ||
1262 | r = link_reconfigure_internal(link, force); | |
572b21d9 YW |
1263 | if (r < 0) |
1264 | link_enter_failed(link); | |
1265 | ||
5a1860f7 | 1266 | return 0; |
572b21d9 YW |
1267 | } |
1268 | ||
5a1860f7 YW |
1269 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
1270 | return link_reconfigure_handler_internal(rtnl, m, link, false); | |
1271 | } | |
572b21d9 | 1272 | |
5a1860f7 YW |
1273 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
1274 | return link_reconfigure_handler_internal(rtnl, m, link, true); | |
572b21d9 YW |
1275 | } |
1276 | ||
1277 | int link_reconfigure(Link *link, bool force) { | |
572b21d9 YW |
1278 | int r; |
1279 | ||
8bceafa7 | 1280 | /* When link in pending or initialized state, then link_configure() will be called. To prevent |
f8dd4077 ZJS |
1281 | * the function from being called multiple times simultaneously, refuse to reconfigure the |
1282 | * interface in these cases. */ | |
8bceafa7 | 1283 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
f8dd4077 | 1284 | return 0; /* 0 means no-op. */ |
2c0d7ed3 | 1285 | |
5a1860f7 | 1286 | r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler); |
572b21d9 YW |
1287 | if (r < 0) |
1288 | return r; | |
1289 | ||
8bceafa7 | 1290 | return 1; /* 1 means the interface will be reconfigured. */ |
572b21d9 YW |
1291 | } |
1292 | ||
e6bf7774 | 1293 | static int link_initialized_and_synced(Link *link) { |
505f8da7 | 1294 | Network *network; |
505f8da7 TG |
1295 | int r; |
1296 | ||
1297 | assert(link); | |
1298 | assert(link->ifname); | |
1299 | assert(link->manager); | |
1300 | ||
bd08ce56 | 1301 | /* We may get called either from the asynchronous netlink callback, |
0d411b7f | 1302 | * or directly from link_check_initialized() if running in a container. */ |
bd08ce56 | 1303 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
4232cf04 | 1304 | return 0; |
505f8da7 | 1305 | |
6a7a4e4d | 1306 | log_link_debug(link, "Link state is up-to-date"); |
bd08ce56 | 1307 | link_set_state(link, LINK_STATE_INITIALIZED); |
505f8da7 | 1308 | |
0d4ad91d AR |
1309 | r = link_new_bound_by_list(link); |
1310 | if (r < 0) | |
1311 | return r; | |
1312 | ||
1313 | r = link_handle_bound_by_list(link); | |
1314 | if (r < 0) | |
1315 | return r; | |
1316 | ||
c4a03a56 | 1317 | if (!link->network) { |
0894cfe4 | 1318 | r = wifi_get_info(link); |
8d968fdd YW |
1319 | if (r < 0) |
1320 | return r; | |
1321 | ||
170e88c8 | 1322 | r = link_get_network(link, &network); |
c4a03a56 | 1323 | if (r == -ENOENT) { |
29836c16 | 1324 | link_set_state(link, LINK_STATE_UNMANAGED); |
4232cf04 | 1325 | return 0; |
170e88c8 YW |
1326 | } |
1327 | if (r < 0) | |
c4a03a56 | 1328 | return r; |
505f8da7 | 1329 | |
c4a03a56 TG |
1330 | if (link->flags & IFF_LOOPBACK) { |
1331 | if (network->link_local != ADDRESS_FAMILY_NO) | |
1332 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
78c958f8 | 1333 | |
c4a03a56 TG |
1334 | if (network->dhcp != ADDRESS_FAMILY_NO) |
1335 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
78c958f8 | 1336 | |
c4a03a56 TG |
1337 | if (network->dhcp_server) |
1338 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
1339 | } | |
bd2efe92 | 1340 | |
9092113d | 1341 | link->network = network_ref(network); |
bcdcc596 | 1342 | link_update_operstate(link, false); |
9092113d | 1343 | link_dirty(link); |
c4a03a56 | 1344 | } |
505f8da7 | 1345 | |
0d4ad91d AR |
1346 | r = link_new_bound_to_list(link); |
1347 | if (r < 0) | |
1348 | return r; | |
1349 | ||
852a3916 | 1350 | return link_configure(link); |
505f8da7 TG |
1351 | } |
1352 | ||
302a796f | 1353 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4ff296b0 YW |
1354 | int r; |
1355 | ||
5a1860f7 YW |
1356 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized"); |
1357 | if (r <= 0) | |
0b54c870 | 1358 | return r; |
572b21d9 | 1359 | |
4ff296b0 YW |
1360 | r = link_initialized_and_synced(link); |
1361 | if (r < 0) | |
1362 | link_enter_failed(link); | |
5a1860f7 YW |
1363 | |
1364 | return 0; | |
e6bf7774 YW |
1365 | } |
1366 | ||
3be9d62a | 1367 | static int link_initialized(Link *link, sd_device *device) { |
4f561e8e | 1368 | assert(link); |
4f561e8e TG |
1369 | assert(device); |
1370 | ||
8434fd5c | 1371 | if (link->state != LINK_STATE_PENDING) |
4f561e8e TG |
1372 | return 0; |
1373 | ||
51517f9e | 1374 | if (link->sd_device) |
679b3605 TG |
1375 | return 0; |
1376 | ||
79008bdd | 1377 | log_link_debug(link, "udev initialized link"); |
bd08ce56 | 1378 | link_set_state(link, LINK_STATE_INITIALIZED); |
4f561e8e | 1379 | |
51517f9e | 1380 | link->sd_device = sd_device_ref(device); |
4f561e8e | 1381 | |
3c9b8860 TG |
1382 | /* udev has initialized the link, but we don't know if we have yet |
1383 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1384 | * when it returns we know that the pending NEWLINKs have already been | |
1385 | * processed and that we are up-to-date */ | |
4f561e8e | 1386 | |
5a1860f7 | 1387 | return link_call_getlink(link, link_initialized_handler); |
cc2d7efc YW |
1388 | } |
1389 | ||
0d411b7f | 1390 | static int link_check_initialized(Link *link) { |
51517f9e | 1391 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
505f8da7 | 1392 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; |
5a937ea2 | 1393 | int r; |
505f8da7 | 1394 | |
0d411b7f | 1395 | assert(link); |
505f8da7 | 1396 | |
0d411b7f | 1397 | if (path_is_read_only_fs("/sys") > 0) |
852a3916 | 1398 | /* no udev */ |
0d411b7f | 1399 | return link_initialized_and_synced(link); |
852a3916 YW |
1400 | |
1401 | /* udev should be around */ | |
1402 | xsprintf(ifindex_str, "n%d", link->ifindex); | |
1403 | r = sd_device_new_from_device_id(&device, ifindex_str); | |
1404 | if (r < 0) { | |
1405 | log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | r = sd_device_get_is_initialized(device); | |
0d411b7f YW |
1410 | if (r < 0) |
1411 | return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); | |
852a3916 YW |
1412 | if (r == 0) { |
1413 | /* not yet ready */ | |
1414 | log_link_debug(link, "link pending udev initialization..."); | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | r = device_is_renaming(device); | |
0d411b7f YW |
1419 | if (r < 0) |
1420 | return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); | |
852a3916 YW |
1421 | if (r > 0) { |
1422 | log_link_debug(link, "Interface is being renamed, pending initialization."); | |
1423 | return 0; | |
4f561e8e | 1424 | } |
505f8da7 | 1425 | |
0d411b7f | 1426 | return link_initialized(link, device); |
a748b692 TG |
1427 | } |
1428 | ||
3be9d62a YW |
1429 | int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
1430 | sd_device_action_t action; | |
1431 | Manager *m = userdata; | |
1432 | Link *link = NULL; | |
1433 | int r, ifindex; | |
1434 | ||
1435 | assert(m); | |
1436 | assert(device); | |
1437 | ||
1438 | r = sd_device_get_action(device, &action); | |
1439 | if (r < 0) { | |
1440 | log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m"); | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents | |
1445 | * are "positive" events in some form, i.e. inform us about a changed or new network interface, that | |
1446 | * still exists — and we are interested in that. */ | |
1447 | if (action == SD_DEVICE_REMOVE) | |
1448 | return 0; | |
1449 | ||
1450 | r = sd_device_get_ifindex(device, &ifindex); | |
1451 | if (r < 0) { | |
1452 | log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m", | |
1453 | device_action_to_string(action)); | |
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | r = device_is_renaming(device); | |
1458 | if (r < 0) { | |
4b9a8c2b | 1459 | log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m", |
3be9d62a YW |
1460 | device_action_to_string(action)); |
1461 | return 0; | |
1462 | } | |
1463 | if (r > 0) { | |
1464 | log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed."); | |
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | r = link_get(m, ifindex, &link); | |
1469 | if (r < 0) { | |
4b9a8c2b | 1470 | log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); |
3be9d62a YW |
1471 | return 0; |
1472 | } | |
1473 | ||
4b9a8c2b YW |
1474 | r = link_initialized(link, device); |
1475 | if (r < 0) | |
1476 | link_enter_failed(link); | |
3be9d62a YW |
1477 | |
1478 | return 0; | |
1479 | } | |
1480 | ||
9c0a72f9 TG |
1481 | static int link_carrier_gained(Link *link) { |
1482 | int r; | |
1483 | ||
1484 | assert(link); | |
1485 | ||
aa9117c0 YW |
1486 | r = link_handle_bound_by_list(link); |
1487 | if (r < 0) | |
1488 | return r; | |
1489 | ||
600b7898 YW |
1490 | if (link->iftype == ARPHRD_CAN) |
1491 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 | 1492 | return 0; |
600b7898 | 1493 | |
0894cfe4 | 1494 | r = wifi_get_info(link); |
8d968fdd YW |
1495 | if (r < 0) |
1496 | return r; | |
1497 | if (r > 0) { | |
0e397560 YW |
1498 | r = link_reconfigure_internal(link, false); |
1499 | if (r != 0) | |
8d968fdd YW |
1500 | return r; |
1501 | } | |
1502 | ||
b9ea3d2e | 1503 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
8566df79 | 1504 | r = link_acquire_dynamic_conf(link); |
f0269653 | 1505 | if (r < 0) |
9c0a72f9 | 1506 | return r; |
6fc25497 | 1507 | |
97108953 | 1508 | r = link_request_static_configs(link); |
6fc25497 SS |
1509 | if (r < 0) |
1510 | return r; | |
9c0a72f9 TG |
1511 | } |
1512 | ||
aa9117c0 | 1513 | return 0; |
9c0a72f9 TG |
1514 | } |
1515 | ||
1516 | static int link_carrier_lost(Link *link) { | |
1517 | int r; | |
1518 | ||
1519 | assert(link); | |
1520 | ||
aa9117c0 YW |
1521 | r = link_handle_bound_by_list(link); |
1522 | if (r < 0) | |
1523 | return r; | |
93b4dab5 | 1524 | |
600b7898 YW |
1525 | if (link->iftype == ARPHRD_CAN) |
1526 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 YW |
1527 | return 0; |
1528 | ||
1529 | if (link->network && link->network->ignore_carrier_loss) | |
1530 | return 0; | |
600b7898 | 1531 | |
2a99eed0 | 1532 | r = link_stop_engines(link, false); |
9c0a72f9 TG |
1533 | if (r < 0) { |
1534 | link_enter_failed(link); | |
1535 | return r; | |
1536 | } | |
1537 | ||
3104883d SS |
1538 | r = link_drop_config(link); |
1539 | if (r < 0) | |
1540 | return r; | |
1541 | ||
2c7b826d | 1542 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
942cf4b8 | 1543 | log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
c436d553 MM |
1544 | r = link_drop_foreign_config(link); |
1545 | if (r < 0) | |
1546 | return r; | |
1547 | } | |
3104883d | 1548 | |
aa9117c0 | 1549 | return 0; |
0c9ee5d5 YW |
1550 | } |
1551 | ||
1552 | int link_carrier_reset(Link *link) { | |
1553 | int r; | |
1554 | ||
1555 | assert(link); | |
1556 | ||
852a3916 YW |
1557 | if (!link_has_carrier(link)) |
1558 | return 0; | |
0c9ee5d5 | 1559 | |
852a3916 YW |
1560 | r = link_carrier_lost(link); |
1561 | if (r < 0) | |
1562 | return r; | |
0c9ee5d5 | 1563 | |
852a3916 YW |
1564 | r = link_carrier_gained(link); |
1565 | if (r < 0) | |
1566 | return r; | |
0c9ee5d5 | 1567 | |
852a3916 | 1568 | log_link_info(link, "Reset carrier"); |
0c9ee5d5 YW |
1569 | return 0; |
1570 | } | |
1571 | ||
1572 | static int link_admin_state_up(Link *link) { | |
1573 | int r; | |
1574 | ||
1575 | assert(link); | |
1576 | ||
1577 | /* This is called every time an interface admin state changes to up; | |
1578 | * specifically, when IFF_UP flag changes from unset to set. */ | |
1579 | ||
1580 | if (!link->network) | |
1581 | return 0; | |
1582 | ||
899b0e5e | 1583 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { |
712fd5d2 YW |
1584 | log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down."); |
1585 | return link_request_to_bring_up_or_down(link, /* up = */ false); | |
0c9ee5d5 YW |
1586 | } |
1587 | ||
1588 | /* We set the ipv6 mtu after the device mtu, but the kernel resets | |
1589 | * ipv6 mtu on NETDEV_UP, so we need to reset it. */ | |
1590 | r = link_set_ipv6_mtu(link); | |
1591 | if (r < 0) | |
1592 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m"); | |
1593 | ||
1594 | return 0; | |
1595 | } | |
1596 | ||
1597 | static int link_admin_state_down(Link *link) { | |
1598 | assert(link); | |
1599 | ||
1600 | if (!link->network) | |
1601 | return 0; | |
1602 | ||
899b0e5e | 1603 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { |
712fd5d2 YW |
1604 | log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up."); |
1605 | return link_request_to_bring_up_or_down(link, /* up = */ true); | |
0c9ee5d5 YW |
1606 | } |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | bool link_has_carrier(Link *link) { | |
1612 | /* see Documentation/networking/operstates.txt in the kernel sources */ | |
1613 | ||
1614 | if (link->kernel_operstate == IF_OPER_UP) | |
1615 | return true; | |
1616 | ||
1617 | if (link->kernel_operstate == IF_OPER_UNKNOWN) | |
1618 | /* operstate may not be implemented, so fall back to flags */ | |
1619 | if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && | |
1620 | !FLAGS_SET(link->flags, IFF_DORMANT)) | |
1621 | return true; | |
1622 | ||
1623 | return false; | |
1624 | } | |
1625 | ||
1626 | static bool link_is_enslaved(Link *link) { | |
1627 | if (link->flags & IFF_SLAVE) | |
1628 | /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ | |
1629 | return true; | |
1630 | ||
1631 | if (!link->network) | |
1632 | return false; | |
1633 | ||
1634 | if (link->master_ifindex > 0 && link->network->bridge) | |
1635 | return true; | |
1636 | ||
1637 | /* TODO: add conditions for other netdevs. */ | |
1638 | ||
1639 | return false; | |
1640 | } | |
1641 | ||
1642 | static LinkAddressState address_state_from_scope(uint8_t scope) { | |
1643 | if (scope < RT_SCOPE_SITE) | |
1644 | /* universally accessible addresses found */ | |
1645 | return LINK_ADDRESS_STATE_ROUTABLE; | |
1646 | ||
1647 | if (scope < RT_SCOPE_HOST) | |
1648 | /* only link or site local addresses found */ | |
1649 | return LINK_ADDRESS_STATE_DEGRADED; | |
1650 | ||
1651 | /* no useful addresses found */ | |
1652 | return LINK_ADDRESS_STATE_OFF; | |
1653 | } | |
1654 | ||
1655 | void link_update_operstate(Link *link, bool also_update_master) { | |
1656 | LinkOperationalState operstate; | |
1657 | LinkCarrierState carrier_state; | |
1658 | LinkAddressState ipv4_address_state, ipv6_address_state, address_state; | |
1659 | LinkOnlineState online_state; | |
1660 | _cleanup_strv_free_ char **p = NULL; | |
1661 | uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE; | |
1662 | bool changed = false; | |
1663 | Address *address; | |
1664 | ||
1665 | assert(link); | |
1666 | ||
1667 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1668 | carrier_state = LINK_CARRIER_STATE_DORMANT; | |
1669 | else if (link_has_carrier(link)) { | |
1670 | if (link_is_enslaved(link)) | |
1671 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
1672 | else | |
1673 | carrier_state = LINK_CARRIER_STATE_CARRIER; | |
1674 | } else if (link->flags & IFF_UP) | |
1675 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; | |
1676 | else | |
1677 | carrier_state = LINK_CARRIER_STATE_OFF; | |
1678 | ||
1679 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { | |
1680 | Link *slave; | |
1681 | ||
1682 | SET_FOREACH(slave, link->slaves) { | |
1683 | link_update_operstate(slave, false); | |
1684 | ||
1685 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) | |
1686 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | SET_FOREACH(address, link->addresses) { | |
1691 | if (!address_is_ready(address)) | |
1692 | continue; | |
1693 | ||
1694 | if (address->family == AF_INET) | |
1695 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
1696 | ||
1697 | if (address->family == AF_INET6) | |
1698 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1699 | } | |
1700 | ||
1701 | /* for operstate we also take foreign addresses into account */ | |
1702 | SET_FOREACH(address, link->addresses_foreign) { | |
1703 | if (!address_is_ready(address)) | |
1704 | continue; | |
1705 | ||
1706 | if (address->family == AF_INET) | |
1707 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
1708 | ||
1709 | if (address->family == AF_INET6) | |
1710 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1711 | } | |
1712 | ||
1713 | ipv4_address_state = address_state_from_scope(ipv4_scope); | |
1714 | ipv6_address_state = address_state_from_scope(ipv6_scope); | |
1715 | address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope)); | |
1716 | ||
1717 | /* Mapping of address and carrier state vs operational state | |
1718 | * carrier state | |
1719 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1720 | * ------------------------------------------------------------------------------ | |
1721 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1722 | * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved | |
1723 | * routable | off | no-carrier | dormant | degraded-carrier | routable | routable | |
1724 | */ | |
1725 | ||
1726 | if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) | |
1727 | operstate = (LinkOperationalState) carrier_state; | |
1728 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
1729 | operstate = LINK_OPERSTATE_ROUTABLE; | |
1730 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
1731 | operstate = LINK_OPERSTATE_DEGRADED; | |
1732 | else | |
1733 | operstate = LINK_OPERSTATE_ENSLAVED; | |
1734 | ||
1735 | /* Only determine online state for managed links with RequiredForOnline=yes */ | |
1736 | if (!link->network || !link->network->required_for_online) | |
1737 | online_state = _LINK_ONLINE_STATE_INVALID; | |
1738 | else if (operstate < link->network->required_operstate_for_online.min || | |
1739 | operstate > link->network->required_operstate_for_online.max) | |
1740 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1741 | else { | |
1742 | AddressFamily required_family = link->network->required_family_for_online; | |
1743 | bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; | |
1744 | bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; | |
1745 | ||
1746 | /* The operational state is within the range required for online. | |
1747 | * If a particular address family is also required, we might revert | |
1748 | * to offline in the blocks below. */ | |
1749 | online_state = LINK_ONLINE_STATE_ONLINE; | |
1750 | ||
1751 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { | |
1752 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1753 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1754 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1755 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1756 | } | |
1757 | ||
1758 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { | |
1759 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1760 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1761 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1762 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | if (link->carrier_state != carrier_state) { | |
1767 | link->carrier_state = carrier_state; | |
1768 | changed = true; | |
1769 | if (strv_extend(&p, "CarrierState") < 0) | |
1770 | log_oom(); | |
1771 | } | |
1772 | ||
1773 | if (link->address_state != address_state) { | |
1774 | link->address_state = address_state; | |
1775 | changed = true; | |
1776 | if (strv_extend(&p, "AddressState") < 0) | |
1777 | log_oom(); | |
1778 | } | |
0d4ad91d | 1779 | |
0c9ee5d5 YW |
1780 | if (link->ipv4_address_state != ipv4_address_state) { |
1781 | link->ipv4_address_state = ipv4_address_state; | |
1782 | changed = true; | |
1783 | if (strv_extend(&p, "IPv4AddressState") < 0) | |
1784 | log_oom(); | |
1785 | } | |
9c0a72f9 | 1786 | |
0c9ee5d5 YW |
1787 | if (link->ipv6_address_state != ipv6_address_state) { |
1788 | link->ipv6_address_state = ipv6_address_state; | |
1789 | changed = true; | |
1790 | if (strv_extend(&p, "IPv6AddressState") < 0) | |
1791 | log_oom(); | |
1792 | } | |
9c0a72f9 | 1793 | |
0c9ee5d5 YW |
1794 | if (link->operstate != operstate) { |
1795 | link->operstate = operstate; | |
1796 | changed = true; | |
1797 | if (strv_extend(&p, "OperationalState") < 0) | |
1798 | log_oom(); | |
1799 | } | |
9c0a72f9 | 1800 | |
0c9ee5d5 YW |
1801 | if (link->online_state != online_state) { |
1802 | link->online_state = online_state; | |
1803 | changed = true; | |
1804 | if (strv_extend(&p, "OnlineState") < 0) | |
1805 | log_oom(); | |
1806 | } | |
9c0a72f9 | 1807 | |
0c9ee5d5 YW |
1808 | if (p) |
1809 | link_send_changed_strv(link, p); | |
1810 | if (changed) | |
1811 | link_dirty(link); | |
9c0a72f9 | 1812 | |
0c9ee5d5 YW |
1813 | if (also_update_master) { |
1814 | Link *master; | |
9c0a72f9 | 1815 | |
0c9ee5d5 YW |
1816 | if (link_get_master(link, &master) >= 0) |
1817 | link_update_operstate(master, true); | |
1818 | } | |
9c0a72f9 TG |
1819 | } |
1820 | ||
0c9ee5d5 YW |
1821 | #define FLAG_STRING(string, flag, old, new) \ |
1822 | (((old ^ new) & flag) \ | |
1823 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
1824 | : "") | |
1825 | ||
0d411b7f YW |
1826 | static int link_update_flags(Link *link, sd_netlink_message *message) { |
1827 | bool link_was_admin_up, had_carrier; | |
0c9ee5d5 YW |
1828 | uint8_t operstate; |
1829 | unsigned flags; | |
d236718c DS |
1830 | int r; |
1831 | ||
61135582 | 1832 | assert(link); |
0d411b7f | 1833 | assert(message); |
61135582 | 1834 | |
0d411b7f | 1835 | r = sd_rtnl_message_link_get_flags(message, &flags); |
0c9ee5d5 | 1836 | if (r < 0) |
0d411b7f | 1837 | return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m"); |
3be9d62a | 1838 | |
0d411b7f YW |
1839 | r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate); |
1840 | if (r == -ENODATA) | |
1841 | /* If we got a message without operstate, assume the state was unchanged. */ | |
0c9ee5d5 | 1842 | operstate = link->kernel_operstate; |
0d411b7f YW |
1843 | else if (r < 0) |
1844 | return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m"); | |
0c9ee5d5 | 1845 | |
0d411b7f | 1846 | if (link->flags == flags && link->kernel_operstate == operstate) |
61135582 DS |
1847 | return 0; |
1848 | ||
0c9ee5d5 YW |
1849 | if (link->flags != flags) { |
1850 | unsigned unknown_flags, unknown_flags_added, unknown_flags_removed; | |
61135582 | 1851 | |
0c9ee5d5 YW |
1852 | 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", |
1853 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
1854 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
1855 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
1856 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
1857 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
1858 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
1859 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
1860 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
1861 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
1862 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
1863 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
1864 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
1865 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
1866 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
1867 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
1868 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
1869 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
1870 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
1871 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
d236718c | 1872 | |
0c9ee5d5 YW |
1873 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
1874 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
1875 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
1876 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
1877 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
1878 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
1879 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
1880 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
d236718c | 1881 | |
0c9ee5d5 YW |
1882 | if (unknown_flags_added) |
1883 | log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added); | |
61135582 | 1884 | |
0c9ee5d5 YW |
1885 | if (unknown_flags_removed) |
1886 | log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed); | |
1887 | } | |
61135582 | 1888 | |
0d411b7f YW |
1889 | link_was_admin_up = link->flags & IFF_UP; |
1890 | had_carrier = link_has_carrier(link); | |
1891 | ||
0c9ee5d5 YW |
1892 | link->flags = flags; |
1893 | link->kernel_operstate = operstate; | |
36161cba | 1894 | |
0c9ee5d5 | 1895 | link_update_operstate(link, true); |
61135582 | 1896 | |
0d411b7f YW |
1897 | if (!link_was_admin_up && (link->flags & IFF_UP)) { |
1898 | log_link_info(link, "Link UP"); | |
22936833 | 1899 | |
0d411b7f YW |
1900 | r = link_admin_state_up(link); |
1901 | if (r < 0) | |
1902 | return r; | |
1903 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) { | |
1904 | log_link_info(link, "Link DOWN"); | |
0d4ad91d | 1905 | |
0d411b7f | 1906 | r = link_admin_state_down(link); |
0d4ad91d AR |
1907 | if (r < 0) |
1908 | return r; | |
7619683b TG |
1909 | } |
1910 | ||
0d411b7f YW |
1911 | r = link_update_lldp(link); |
1912 | if (r < 0) | |
1913 | return r; | |
b8941f74 | 1914 | |
0d411b7f YW |
1915 | if (!had_carrier && link_has_carrier(link)) { |
1916 | log_link_info(link, "Gained carrier"); | |
0d4ad91d | 1917 | |
0d411b7f | 1918 | r = link_carrier_gained(link); |
30de2b89 YW |
1919 | if (r < 0) |
1920 | return r; | |
0d411b7f YW |
1921 | } else if (had_carrier && !link_has_carrier(link)) { |
1922 | log_link_info(link, "Lost carrier"); | |
1923 | ||
1924 | r = link_carrier_lost(link); | |
0b54c870 YW |
1925 | if (r < 0) |
1926 | return r; | |
b8941f74 TG |
1927 | } |
1928 | ||
0d411b7f YW |
1929 | return 0; |
1930 | } | |
afe7fd56 | 1931 | |
0d411b7f YW |
1932 | static int link_update_master(Link *link, sd_netlink_message *message) { |
1933 | int master_ifindex, r; | |
7465dd22 | 1934 | |
0d411b7f YW |
1935 | assert(link); |
1936 | assert(message); | |
69629de9 | 1937 | |
0d411b7f YW |
1938 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex); |
1939 | if (r == -ENODATA) | |
1940 | return 0; | |
1941 | if (r < 0) | |
1942 | return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m"); | |
807667f7 | 1943 | |
0d411b7f YW |
1944 | if (master_ifindex == link->master_ifindex) |
1945 | return 0; | |
807667f7 | 1946 | |
0d411b7f YW |
1947 | if (link->master_ifindex == 0) |
1948 | log_link_debug(link, "Joined to master interface: %i", master_ifindex); | |
1949 | else if (master_ifindex == 0) | |
1950 | log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex); | |
1951 | else | |
1952 | log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex); | |
807667f7 | 1953 | |
0d411b7f | 1954 | link_drop_from_master(link); |
807667f7 | 1955 | |
0d411b7f | 1956 | link->master_ifindex = master_ifindex; |
413708d1 | 1957 | |
0d411b7f YW |
1958 | r = link_append_to_master(link); |
1959 | if (r < 0) | |
1960 | return log_link_debug_errno(link, r, "Failed to append link to master: %m"); | |
7465dd22 | 1961 | |
0d411b7f YW |
1962 | return 0; |
1963 | } | |
807667f7 | 1964 | |
0d411b7f YW |
1965 | static int link_update_hardware_address(Link *link, sd_netlink_message *message) { |
1966 | hw_addr_data hw_addr; | |
1967 | int r; | |
d93d655c | 1968 | |
0d411b7f YW |
1969 | assert(link); |
1970 | assert(message); | |
dfc58b47 | 1971 | |
0d411b7f YW |
1972 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); |
1973 | if (r < 0 && r != -ENODATA) | |
1974 | return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m"); | |
4f882b2a | 1975 | |
0d411b7f YW |
1976 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &hw_addr); |
1977 | if (r == -ENODATA) | |
1978 | return 0; | |
1979 | if (r < 0) | |
1980 | return log_link_warning_errno(link, r, "rtnl: failed to read hardware address: %m"); | |
bb262ef0 | 1981 | |
0d411b7f YW |
1982 | if (link->hw_addr.length == hw_addr.length && |
1983 | memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) == 0) | |
1984 | return 0; | |
a61bb41c | 1985 | |
0d411b7f YW |
1986 | link->hw_addr = hw_addr; |
1987 | ||
1988 | log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr)); | |
1989 | ||
1990 | r = ipv4ll_update_mac(link); | |
a61bb41c | 1991 | if (r < 0) |
0d411b7f | 1992 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
a61bb41c | 1993 | |
0d411b7f YW |
1994 | r = dhcp4_update_mac(link); |
1995 | if (r < 0) | |
1996 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
d236718c | 1997 | |
0d411b7f YW |
1998 | r = dhcp6_update_mac(link); |
1999 | if (r < 0) | |
2000 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
2001 | ||
2002 | r = radv_update_mac(link); | |
2003 | if (r < 0) | |
2004 | return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
2005 | ||
2006 | if (link->ndisc) { | |
2007 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether); | |
d236718c | 2008 | if (r < 0) |
0d411b7f YW |
2009 | return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m"); |
2010 | } | |
d236718c | 2011 | |
0d411b7f YW |
2012 | if (link->lldp) { |
2013 | r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether); | |
61135582 | 2014 | if (r < 0) |
0d411b7f | 2015 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP: %m"); |
61135582 DS |
2016 | } |
2017 | ||
0d411b7f | 2018 | r = ipv4_dad_update_mac(link); |
273eec24 | 2019 | if (r < 0) |
0d411b7f | 2020 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); |
273eec24 | 2021 | |
0d411b7f YW |
2022 | return 0; |
2023 | } | |
a61bb41c | 2024 | |
0d411b7f | 2025 | static int link_update_mtu(Link *link, sd_netlink_message *message) { |
717ba5fc | 2026 | uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX; |
0d411b7f | 2027 | int r; |
a61bb41c | 2028 | |
0d411b7f YW |
2029 | assert(link); |
2030 | assert(message); | |
2031 | ||
2032 | r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu); | |
2033 | if (r == -ENODATA) | |
2034 | return 0; | |
2035 | if (r < 0) | |
2036 | return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m"); | |
2037 | ||
717ba5fc YW |
2038 | r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu); |
2039 | if (r < 0 && r != -ENODATA) | |
2040 | return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m"); | |
2041 | ||
2042 | r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu); | |
2043 | if (r < 0 && r != -ENODATA) | |
2044 | return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m"); | |
2045 | ||
2046 | if (mtu == 0) | |
0d411b7f YW |
2047 | return 0; |
2048 | ||
717ba5fc YW |
2049 | if (max_mtu == 0) |
2050 | max_mtu = UINT32_MAX; | |
2051 | ||
2052 | link->min_mtu = min_mtu; | |
2053 | link->max_mtu = max_mtu; | |
2054 | ||
0d411b7f YW |
2055 | if (link->original_mtu == 0) { |
2056 | link->original_mtu = mtu; | |
717ba5fc YW |
2057 | log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2058 | link->original_mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2059 | } |
2060 | ||
717ba5fc YW |
2061 | if (link->mtu == mtu) |
2062 | return 0; | |
2063 | ||
2064 | log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", | |
2065 | link->mtu, mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2066 | |
2067 | link->mtu = mtu; | |
2068 | ||
2069 | if (link->dhcp_client) { | |
2070 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
9c0a72f9 | 2071 | if (r < 0) |
0d411b7f YW |
2072 | return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m"); |
2073 | } | |
a61bb41c | 2074 | |
0d411b7f YW |
2075 | if (link->radv) { |
2076 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
9c0a72f9 | 2077 | if (r < 0) |
0d411b7f | 2078 | return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
a61bb41c TG |
2079 | } |
2080 | ||
2081 | return 0; | |
dd3efc09 | 2082 | } |
fe8db0c5 | 2083 | |
0d411b7f YW |
2084 | static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
2085 | _cleanup_strv_free_ char **altnames = NULL; | |
2086 | char **n; | |
2087 | int r; | |
2088 | ||
2089 | assert(link); | |
2090 | assert(message); | |
2091 | ||
2092 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); | |
2093 | if (r < 0 && r != -ENODATA) | |
2094 | return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); | |
2095 | ||
2096 | STRV_FOREACH(n, link->alternative_names) | |
2097 | hashmap_remove(link->manager->links_by_name, *n); | |
2098 | ||
2099 | strv_free_and_replace(link->alternative_names, altnames); | |
2100 | ||
2101 | STRV_FOREACH(n, link->alternative_names) { | |
2102 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); | |
2103 | if (r < 0) | |
2104 | return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m"); | |
2105 | } | |
2106 | ||
2107 | return 0; | |
2108 | } | |
2109 | ||
2110 | static int link_update_name(Link *link, sd_netlink_message *message) { | |
2111 | const char *ifname; | |
2112 | int r; | |
2113 | ||
2114 | assert(link); | |
2115 | assert(message); | |
2116 | ||
2117 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
2118 | if (r == -ENODATA) | |
2119 | /* Hmm?? But ok.*/ | |
2120 | return 0; | |
2121 | if (r < 0) | |
2122 | return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m"); | |
2123 | ||
2124 | if (streq(ifname, link->ifname)) | |
2125 | return 0; | |
2126 | ||
2127 | log_link_info(link, "Interface name change detected, renamed to %s.", ifname); | |
2128 | ||
2129 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
2130 | ||
2131 | r = free_and_strdup(&link->ifname, ifname); | |
2132 | if (r < 0) | |
2133 | return log_oom_debug(); | |
2134 | ||
2135 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link); | |
2136 | if (r < 0) | |
2137 | return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m"); | |
2138 | ||
2139 | return 0; | |
2140 | } | |
2141 | ||
2142 | static int link_update(Link *link, sd_netlink_message *message) { | |
2143 | int r; | |
2144 | ||
2145 | assert(link); | |
2146 | assert(message); | |
2147 | ||
2148 | r = link_update_name(link, message); | |
2149 | if (r < 0) | |
2150 | return r; | |
2151 | ||
2152 | r = link_update_alternative_names(link, message); | |
2153 | if (r < 0) | |
2154 | return r; | |
2155 | ||
2156 | r = link_update_mtu(link, message); | |
2157 | if (r < 0) | |
2158 | return r; | |
2159 | ||
2160 | r = link_update_hardware_address(link, message); | |
2161 | if (r < 0) | |
2162 | return r; | |
2163 | ||
2164 | r = link_update_master(link, message); | |
2165 | if (r < 0) | |
2166 | return r; | |
2167 | ||
2168 | return link_update_flags(link, message); | |
2169 | } | |
2170 | ||
0c9ee5d5 YW |
2171 | static Link *link_drop_or_unref(Link *link) { |
2172 | if (!link) | |
2173 | return NULL; | |
2174 | if (!link->manager) | |
2175 | return link_unref(link); | |
2176 | return link_drop(link); | |
2177 | } | |
2178 | ||
2179 | DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); | |
2180 | ||
2181 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
0d411b7f | 2182 | _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL; |
0c9ee5d5 | 2183 | _cleanup_(link_drop_or_unrefp) Link *link = NULL; |
0c9ee5d5 YW |
2184 | unsigned short iftype; |
2185 | int r, ifindex; | |
0c9ee5d5 YW |
2186 | |
2187 | assert(manager); | |
2188 | assert(message); | |
2189 | assert(ret); | |
2190 | ||
0c9ee5d5 YW |
2191 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
2192 | if (r < 0) | |
0d411b7f | 2193 | return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m"); |
0c9ee5d5 | 2194 | else if (ifindex <= 0) |
0d411b7f | 2195 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex."); |
0c9ee5d5 YW |
2196 | |
2197 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
2198 | if (r < 0) | |
0d411b7f | 2199 | return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m"); |
0c9ee5d5 YW |
2200 | |
2201 | r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); | |
2202 | if (r < 0) | |
0d411b7f | 2203 | return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m"); |
0c9ee5d5 YW |
2204 | |
2205 | /* check for link kind */ | |
2206 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
2207 | if (r >= 0) { | |
0d411b7f YW |
2208 | r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); |
2209 | if (r < 0 && r != -ENODATA) | |
2210 | return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m"); | |
0c9ee5d5 YW |
2211 | r = sd_netlink_message_exit_container(message); |
2212 | if (r < 0) | |
0d411b7f | 2213 | return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m"); |
0c9ee5d5 YW |
2214 | } |
2215 | ||
0d411b7f YW |
2216 | if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0) |
2217 | return log_oom_debug(); | |
2218 | ||
2219 | if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0) | |
2220 | return log_oom_debug(); | |
2221 | ||
2222 | if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0) | |
2223 | return log_oom_debug(); | |
2224 | ||
0c9ee5d5 YW |
2225 | link = new(Link, 1); |
2226 | if (!link) | |
2227 | return -ENOMEM; | |
2228 | ||
2229 | *link = (Link) { | |
2230 | .n_ref = 1, | |
2231 | .state = LINK_STATE_PENDING, | |
2232 | .online_state = _LINK_ONLINE_STATE_INVALID, | |
2233 | .ifindex = ifindex, | |
2234 | .iftype = iftype, | |
2235 | .ifname = TAKE_PTR(ifname), | |
2236 | .kind = TAKE_PTR(kind), | |
2237 | ||
0d411b7f YW |
2238 | .state_file = TAKE_PTR(state_file), |
2239 | .lease_file = TAKE_PTR(lease_file), | |
2240 | .lldp_file = TAKE_PTR(lldp_file), | |
2241 | ||
0c9ee5d5 YW |
2242 | .n_dns = UINT_MAX, |
2243 | .dns_default_route = -1, | |
2244 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
2245 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
2246 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
2247 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
2248 | }; | |
2249 | ||
2250 | r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link); | |
2251 | if (r < 0) | |
0d411b7f | 2252 | return log_link_debug_errno(link, r, "Failed to store link into manager: %m"); |
0c9ee5d5 YW |
2253 | |
2254 | link->manager = manager; | |
2255 | ||
0d411b7f | 2256 | r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
0c9ee5d5 | 2257 | if (r < 0) |
0d411b7f | 2258 | return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m"); |
0c9ee5d5 YW |
2259 | |
2260 | r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac); | |
2261 | if (r < 0) | |
2262 | log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m"); | |
2263 | ||
2264 | r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver); | |
2265 | if (r < 0) | |
2266 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
2267 | ||
0d411b7f | 2268 | log_link_debug(link, "Link %d added", link->ifindex); |
0c9ee5d5 | 2269 | *ret = TAKE_PTR(link); |
0c9ee5d5 YW |
2270 | return 0; |
2271 | } | |
2272 | ||
0d411b7f | 2273 | int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) { |
3be9d62a YW |
2274 | Link *link = NULL; |
2275 | NetDev *netdev = NULL; | |
2276 | uint16_t type; | |
2277 | const char *name; | |
2278 | int r, ifindex; | |
2279 | ||
2280 | assert(rtnl); | |
2281 | assert(message); | |
0d411b7f | 2282 | assert(manager); |
3be9d62a YW |
2283 | |
2284 | if (sd_netlink_message_is_error(message)) { | |
2285 | r = sd_netlink_message_get_errno(message); | |
2286 | if (r < 0) | |
2287 | log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); | |
2288 | ||
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | r = sd_netlink_message_get_type(message, &type); | |
2293 | if (r < 0) { | |
2294 | log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); | |
2295 | return 0; | |
2296 | } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { | |
2297 | log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); | |
2298 | return 0; | |
2299 | } | |
2300 | ||
2301 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
2302 | if (r < 0) { | |
2303 | log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); | |
2304 | return 0; | |
2305 | } else if (ifindex <= 0) { | |
2306 | log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); | |
2307 | return 0; | |
2308 | } | |
2309 | ||
2310 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
2311 | if (r < 0) { | |
2312 | log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); | |
2313 | return 0; | |
2314 | } | |
2315 | ||
0d411b7f YW |
2316 | (void) link_get(manager, ifindex, &link); |
2317 | (void) netdev_get(manager, name, &netdev); | |
3be9d62a YW |
2318 | |
2319 | switch (type) { | |
2320 | case RTM_NEWLINK: | |
0d411b7f YW |
2321 | if (netdev) { |
2322 | /* netdev exists, so make sure the ifindex matches */ | |
2323 | r = netdev_set_ifindex(netdev, message); | |
2324 | if (r < 0) { | |
2325 | log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m"); | |
2326 | return 0; | |
2327 | } | |
2328 | } | |
2329 | ||
3be9d62a YW |
2330 | if (!link) { |
2331 | /* link is new, so add it */ | |
0d411b7f | 2332 | r = link_new(manager, message, &link); |
3be9d62a | 2333 | if (r < 0) { |
0d411b7f | 2334 | log_warning_errno(r, "Could not process new link message: %m"); |
3be9d62a YW |
2335 | return 0; |
2336 | } | |
3be9d62a | 2337 | |
0d411b7f | 2338 | r = link_update(link, message); |
3be9d62a | 2339 | if (r < 0) { |
0d411b7f YW |
2340 | log_warning_errno(r, "Could not process link message: %m"); |
2341 | link_enter_failed(link); | |
3be9d62a YW |
2342 | return 0; |
2343 | } | |
3be9d62a | 2344 | |
0d411b7f YW |
2345 | r = link_check_initialized(link); |
2346 | if (r < 0) { | |
2347 | log_warning_errno(r, "Failed to check link is initialized: %m"); | |
2348 | link_enter_failed(link); | |
2349 | return 0; | |
2350 | } | |
2351 | } else { | |
2352 | r = link_update(link, message); | |
2353 | if (r < 0) { | |
2354 | log_warning_errno(r, "Could not process link message: %m"); | |
2355 | link_enter_failed(link); | |
2356 | return 0; | |
2357 | } | |
3be9d62a YW |
2358 | } |
2359 | ||
2360 | break; | |
2361 | ||
2362 | case RTM_DELLINK: | |
2363 | link_drop(link); | |
2364 | netdev_drop(netdev); | |
2365 | ||
2366 | break; | |
2367 | ||
2368 | default: | |
2369 | assert_not_reached("Received link message with invalid RTNL message type."); | |
2370 | } | |
2371 | ||
2372 | return 1; | |
2373 | } | |
2374 | ||
79c6e114 YW |
2375 | int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
2376 | uint16_t message_type; | |
2377 | int r; | |
2378 | ||
2379 | assert(m); | |
2380 | assert(link); | |
2381 | assert(error_msg); | |
2382 | ||
2383 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2384 | return 0; | |
2385 | ||
2386 | r = sd_netlink_message_get_errno(m); | |
2387 | if (r < 0) { | |
2388 | log_link_message_warning_errno(link, m, r, error_msg); | |
2389 | link_enter_failed(link); | |
2390 | return 0; | |
2391 | } | |
2392 | ||
2393 | r = sd_netlink_message_get_type(m, &message_type); | |
2394 | if (r < 0) { | |
2395 | log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m"); | |
2396 | return 0; | |
2397 | } | |
2398 | if (message_type != RTM_NEWLINK) { | |
2399 | log_link_debug(link, "rtnl: received invalid link message type, ignoring."); | |
2400 | return 0; | |
2401 | } | |
2402 | ||
2403 | r = link_update(link, m); | |
2404 | if (r < 0) { | |
2405 | link_enter_failed(link); | |
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | return 1; | |
2410 | } | |
2411 | ||
2412 | int link_call_getlink(Link *link, link_netlink_message_handler_t callback) { | |
2413 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2414 | int r; | |
2415 | ||
2416 | assert(link); | |
2417 | assert(link->manager); | |
2418 | assert(link->manager->rtnl); | |
2419 | assert(callback); | |
2420 | ||
2421 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex); | |
2422 | if (r < 0) | |
2423 | return r; | |
2424 | ||
2425 | r = netlink_call_async(link->manager->rtnl, NULL, req, callback, | |
2426 | link_netlink_destroy_callback, link); | |
2427 | if (r < 0) | |
2428 | return r; | |
2429 | ||
2430 | link_ref(link); | |
2431 | return 0; | |
2432 | } | |
2433 | ||
fe8db0c5 | 2434 | static const char* const link_state_table[_LINK_STATE_MAX] = { |
8434fd5c | 2435 | [LINK_STATE_PENDING] = "pending", |
bd08ce56 | 2436 | [LINK_STATE_INITIALIZED] = "initialized", |
289e6774 | 2437 | [LINK_STATE_CONFIGURING] = "configuring", |
fe8db0c5 | 2438 | [LINK_STATE_CONFIGURED] = "configured", |
57bd6899 | 2439 | [LINK_STATE_UNMANAGED] = "unmanaged", |
fe8db0c5 | 2440 | [LINK_STATE_FAILED] = "failed", |
370e9930 | 2441 | [LINK_STATE_LINGER] = "linger", |
fe8db0c5 TG |
2442 | }; |
2443 | ||
2444 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |