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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
f579559b | 2 | |
176b8be1 | 3 | #include <net/if.h> |
9aa5d8ba | 4 | #include <netinet/in.h> |
f579559b | 5 | #include <linux/if.h> |
8f815e8b | 6 | #include <linux/if_arp.h> |
518cd6b5 | 7 | #include <linux/if_link.h> |
2a0d07d6 | 8 | #include <linux/netdevice.h> |
8430841b | 9 | #include <sys/socket.h> |
4cc7a82c | 10 | #include <unistd.h> |
f579559b | 11 | |
b5efdb8a | 12 | #include "alloc-util.h" |
8a77e245 | 13 | #include "arphrd-util.h" |
c0267a59 | 14 | #include "batadv.h" |
737f1405 YW |
15 | #include "bond.h" |
16 | #include "bridge.h" | |
1346b1f0 | 17 | #include "bus-util.h" |
3be9d62a YW |
18 | #include "device-private.h" |
19 | #include "device-util.h" | |
27dfc982 | 20 | #include "dhcp-identifier.h" |
bd91b83e | 21 | #include "dhcp-lease-internal.h" |
686d13b9 | 22 | #include "env-file.h" |
4bb7cc82 | 23 | #include "ethtool-util.h" |
6706ce2f | 24 | #include "event-util.h" |
3ffd4af2 | 25 | #include "fd-util.h" |
cf1d700d | 26 | #include "fileio.h" |
176b8be1 | 27 | #include "format-util.h" |
af664001 | 28 | #include "fs-util.h" |
737f1405 | 29 | #include "ipvlan.h" |
ef118d00 | 30 | #include "missing_network.h" |
cf1d700d | 31 | #include "netlink-util.h" |
c6f7c917 | 32 | #include "network-internal.h" |
fb486c90 | 33 | #include "networkd-address-label.h" |
093e3533 | 34 | #include "networkd-address.h" |
9671ae9d | 35 | #include "networkd-bridge-fdb.h" |
ff9e0783 | 36 | #include "networkd-bridge-mdb.h" |
3ddcbeea | 37 | #include "networkd-can.h" |
d5ebcf65 | 38 | #include "networkd-dhcp-prefix-delegation.h" |
8fcf1d61 | 39 | #include "networkd-dhcp-server.h" |
ca5ad760 YW |
40 | #include "networkd-dhcp4.h" |
41 | #include "networkd-dhcp6.h" | |
76a86ffd | 42 | #include "networkd-ipv4acd.h" |
ca5ad760 | 43 | #include "networkd-ipv4ll.h" |
76c5a0f2 | 44 | #include "networkd-ipv6-proxy-ndp.h" |
6a1af3d4 YW |
45 | #include "networkd-link-bus.h" |
46 | #include "networkd-link.h" | |
8e1ad1ea | 47 | #include "networkd-lldp-tx.h" |
23f53b99 | 48 | #include "networkd-manager.h" |
1e7a0e21 | 49 | #include "networkd-ndisc.h" |
e4a71bf3 | 50 | #include "networkd-neighbor.h" |
75156ccb | 51 | #include "networkd-nexthop.h" |
19d9a5ad | 52 | #include "networkd-queue.h" |
7465dd22 | 53 | #include "networkd-radv.h" |
3b6a3bde | 54 | #include "networkd-route.h" |
bce67bbe | 55 | #include "networkd-routing-policy-rule.h" |
0fa8ee6c | 56 | #include "networkd-setlink.h" |
19d9a5ad | 57 | #include "networkd-sriov.h" |
3b5a4fc6 | 58 | #include "networkd-state-file.h" |
19d9a5ad | 59 | #include "networkd-sysctl.h" |
cf1d700d TG |
60 | #include "set.h" |
61 | #include "socket-util.h" | |
bf331d87 | 62 | #include "stat-util.h" |
15a5e950 | 63 | #include "stdio-util.h" |
8b43440b | 64 | #include "string-table.h" |
51517f9e | 65 | #include "strv.h" |
34658df2 | 66 | #include "tc.h" |
e4de7287 | 67 | #include "tmpfile-util.h" |
299ad32d | 68 | #include "udev-util.h" |
cf1d700d | 69 | #include "util.h" |
737f1405 | 70 | #include "vrf.h" |
fc2f9534 | 71 | |
3ca1fab7 | 72 | bool link_ipv4ll_enabled(Link *link) { |
b9d74c40 LP |
73 | assert(link); |
74 | ||
78c958f8 TG |
75 | if (link->flags & IFF_LOOPBACK) |
76 | return false; | |
77 | ||
78 | if (!link->network) | |
79 | return false; | |
80 | ||
500b96eb | 81 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
82 | return false; |
83 | ||
a1e35fca YW |
84 | if (link->hw_addr.length != ETH_ALEN) |
85 | return false; | |
86 | ||
87 | if (ether_addr_is_null(&link->hw_addr.ether)) | |
88 | return false; | |
89 | ||
71df0776 YW |
90 | /* ARPHRD_INFINIBAND seems to potentially support IPv4LL. |
91 | * But currently sd-ipv4ll and sd-ipv4acd only support ARPHRD_ETHER. */ | |
92 | if (link->iftype != ARPHRD_ETHER) | |
93 | return false; | |
94 | ||
95 | if (streq_ptr(link->kind, "vrf")) | |
a8f5bba6 JD |
96 | return false; |
97 | ||
f410d463 YW |
98 | /* L3 or L3S mode do not support ARP. */ |
99 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
100 | return false; | |
101 | ||
f2bfcdb9 YW |
102 | if (link->network->bond) |
103 | return false; | |
104 | ||
3ca1fab7 | 105 | return link->network->link_local & ADDRESS_FAMILY_IPV4; |
8bc17bb3 SS |
106 | } |
107 | ||
f8f2f880 | 108 | bool link_ipv6ll_enabled(Link *link) { |
b9d74c40 LP |
109 | assert(link); |
110 | ||
fa709992 LP |
111 | if (!socket_ipv6_is_supported()) |
112 | return false; | |
113 | ||
d0d6a4cd TG |
114 | if (link->flags & IFF_LOOPBACK) |
115 | return false; | |
116 | ||
117 | if (!link->network) | |
118 | return false; | |
119 | ||
500b96eb | 120 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
121 | return false; |
122 | ||
123 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) | |
a8f5bba6 JD |
124 | return false; |
125 | ||
f2bfcdb9 YW |
126 | if (link->network->bond) |
127 | return false; | |
128 | ||
e0ee46f2 | 129 | return link->network->link_local & ADDRESS_FAMILY_IPV6; |
78c958f8 TG |
130 | } |
131 | ||
e096cab2 YW |
132 | bool link_may_have_ipv6ll(Link *link) { |
133 | assert(link); | |
134 | ||
135 | /* | |
136 | * This is equivalent to link_ipv6ll_enabled() for non-WireGuard interfaces. | |
137 | * | |
138 | * For WireGuard interface, the kernel does not assign any IPv6LL addresses, but we can assign | |
139 | * it manually. It is necessary to set an IPv6LL address manually to run NDisc or RADV on | |
140 | * WireGuard interface. Note, also Multicast=yes must be set. See #17380. | |
141 | * | |
142 | * TODO: May be better to introduce GenerateIPv6LinkLocalAddress= setting, and use algorithms | |
143 | * used in networkd-address-generation.c | |
144 | */ | |
145 | ||
146 | if (link_ipv6ll_enabled(link)) | |
147 | return true; | |
148 | ||
149 | /* IPv6LL address can be manually assigned on WireGuard interface. */ | |
150 | if (streq_ptr(link->kind, "wireguard")) { | |
151 | Address *a; | |
152 | ||
153 | if (!link->network) | |
154 | return false; | |
155 | ||
156 | ORDERED_HASHMAP_FOREACH(a, link->network->addresses_by_section) { | |
157 | if (a->family != AF_INET6) | |
158 | continue; | |
159 | if (in6_addr_is_set(&a->in_addr_peer.in6)) | |
160 | continue; | |
161 | if (in6_addr_is_link_local(&a->in_addr.in6)) | |
162 | return true; | |
163 | } | |
164 | } | |
165 | ||
166 | return false; | |
167 | } | |
168 | ||
5e0534f1 | 169 | bool link_ipv6_enabled(Link *link) { |
439689c6 SS |
170 | assert(link); |
171 | ||
172 | if (!socket_ipv6_is_supported()) | |
173 | return false; | |
174 | ||
b102cdca | 175 | if (link->network->bond) |
2b00a4e0 TY |
176 | return false; |
177 | ||
500b96eb | 178 | if (link->iftype == ARPHRD_CAN) |
af9ba57a YW |
179 | return false; |
180 | ||
4cef7fe3 | 181 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ |
adfeee49 YW |
182 | if (link_ipv6ll_enabled(link)) |
183 | return true; | |
184 | ||
185 | if (network_has_static_ipv6_configurations(link->network)) | |
186 | return true; | |
187 | ||
188 | return false; | |
439689c6 SS |
189 | } |
190 | ||
7191a57a YW |
191 | bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
192 | assert(link); | |
193 | ||
8e4b1b35 | 194 | if (!link->network) { |
7191a57a YW |
195 | if (!allow_unmanaged) |
196 | return false; | |
197 | ||
198 | return link_has_carrier(link); | |
199 | } | |
200 | ||
201 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) | |
202 | return false; | |
203 | ||
baa95d22 YW |
204 | if (!link->network->configure_without_carrier) { |
205 | if (link->set_flags_messages > 0) | |
206 | return false; | |
207 | ||
208 | if (!link_has_carrier(link)) | |
209 | return false; | |
210 | } | |
7191a57a | 211 | |
0fa8ee6c YW |
212 | if (link->set_link_messages > 0) |
213 | return false; | |
214 | ||
112a0972 YW |
215 | if (!link->activated) |
216 | return false; | |
112a0972 | 217 | |
7191a57a YW |
218 | return true; |
219 | } | |
220 | ||
15761549 YW |
221 | void link_ntp_settings_clear(Link *link) { |
222 | link->ntp = strv_free(link->ntp); | |
223 | } | |
224 | ||
225 | void link_dns_settings_clear(Link *link) { | |
f5fbe71d | 226 | if (link->n_dns != UINT_MAX) |
e77bd3fd YW |
227 | for (unsigned i = 0; i < link->n_dns; i++) |
228 | in_addr_full_free(link->dns[i]); | |
15761549 | 229 | link->dns = mfree(link->dns); |
f5fbe71d | 230 | link->n_dns = UINT_MAX; |
15761549 | 231 | |
6e4571f0 YW |
232 | link->search_domains = ordered_set_free(link->search_domains); |
233 | link->route_domains = ordered_set_free(link->route_domains); | |
15761549 YW |
234 | |
235 | link->dns_default_route = -1; | |
236 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
237 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
238 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
239 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
240 | ||
241 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
242 | } | |
243 | ||
1a6bb31f YW |
244 | static void link_free_engines(Link *link) { |
245 | if (!link) | |
246 | return; | |
247 | ||
248 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
249 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); | |
250 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
e49bad01 | 251 | link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name); |
1a6bb31f | 252 | |
35778343 | 253 | link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); |
c01b9b87 | 254 | link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx); |
1a6bb31f YW |
255 | |
256 | ndisc_flush(link); | |
257 | ||
258 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); | |
259 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
1633c457 | 260 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
1a6bb31f YW |
261 | link->ndisc = sd_ndisc_unref(link->ndisc); |
262 | link->radv = sd_radv_unref(link->radv); | |
263 | } | |
264 | ||
8301aa0b | 265 | static Link *link_free(Link *link) { |
8301aa0b | 266 | assert(link); |
f579559b | 267 | |
15761549 YW |
268 | link_ntp_settings_clear(link); |
269 | link_dns_settings_clear(link); | |
270 | ||
8eec0b9d | 271 | link->routes = set_free(link->routes); |
adda1ed9 | 272 | |
8eec0b9d | 273 | link->nexthops = set_free(link->nexthops); |
c16c7808 | 274 | |
8eec0b9d | 275 | link->neighbors = set_free(link->neighbors); |
d1bdafd2 | 276 | |
8eec0b9d | 277 | link->addresses = set_free(link->addresses); |
adda1ed9 | 278 | |
a27588d4 | 279 | link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes); |
4b409e85 | 280 | |
1a6bb31f | 281 | link_free_engines(link); |
49699bac | 282 | |
c166a070 | 283 | free(link->ifname); |
572b21d9 | 284 | strv_free(link->alternative_names); |
ceac4078 | 285 | free(link->kind); |
8d968fdd | 286 | free(link->ssid); |
6706ce2f | 287 | free(link->previous_ssid); |
c643bda5 | 288 | free(link->driver); |
6cad256d | 289 | |
a34e58d4 YW |
290 | unlink_and_free(link->lease_file); |
291 | unlink_and_free(link->lldp_file); | |
292 | unlink_and_free(link->state_file); | |
c166a070 | 293 | |
51517f9e | 294 | sd_device_unref(link->sd_device); |
b5db00e5 | 295 | |
0d4ad91d | 296 | hashmap_free(link->bound_to_links); |
0d4ad91d AR |
297 | hashmap_free(link->bound_by_links); |
298 | ||
5f707e12 | 299 | set_free_with_destructor(link->slaves, link_unref); |
033295c1 | 300 | |
c9c908a6 YW |
301 | network_unref(link->network); |
302 | ||
6706ce2f YW |
303 | sd_event_source_disable_unref(link->carrier_lost_timer); |
304 | ||
8301aa0b | 305 | return mfree(link); |
14b746f7 TG |
306 | } |
307 | ||
8301aa0b | 308 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
14b746f7 | 309 | |
6eab614d | 310 | int link_get_by_index(Manager *m, int ifindex, Link **ret) { |
11a7f229 | 311 | Link *link; |
11a7f229 TG |
312 | |
313 | assert(m); | |
e856ed00 | 314 | assert(ifindex > 0); |
11a7f229 | 315 | |
6eab614d | 316 | link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex)); |
11a7f229 TG |
317 | if (!link) |
318 | return -ENODEV; | |
319 | ||
0b54c870 YW |
320 | if (ret) |
321 | *ret = link; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | int link_get_by_name(Manager *m, const char *ifname, Link **ret) { | |
326 | Link *link; | |
327 | ||
328 | assert(m); | |
329 | assert(ifname); | |
11a7f229 | 330 | |
0b54c870 YW |
331 | link = hashmap_get(m->links_by_name, ifname); |
332 | if (!link) | |
333 | return -ENODEV; | |
334 | ||
335 | if (ret) | |
336 | *ret = link; | |
11a7f229 TG |
337 | return 0; |
338 | } | |
339 | ||
fe321d45 YW |
340 | int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) { |
341 | Link *link; | |
342 | ||
343 | assert(m); | |
344 | assert(hw_addr); | |
345 | ||
346 | link = hashmap_get(m->links_by_hw_addr, hw_addr); | |
347 | if (!link) | |
348 | return -ENODEV; | |
349 | ||
350 | if (ret) | |
351 | *ret = link; | |
352 | return 0; | |
353 | } | |
354 | ||
81357285 YW |
355 | int link_get_master(Link *link, Link **ret) { |
356 | assert(link); | |
357 | assert(link->manager); | |
358 | assert(ret); | |
359 | ||
360 | if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex) | |
361 | return -ENODEV; | |
362 | ||
6eab614d | 363 | return link_get_by_index(link->manager, link->master_ifindex, ret); |
81357285 YW |
364 | } |
365 | ||
af9ba57a | 366 | void link_set_state(Link *link, LinkState state) { |
e331e246 TG |
367 | assert(link); |
368 | ||
369 | if (link->state == state) | |
370 | return; | |
371 | ||
0beb9542 YW |
372 | log_link_debug(link, "State changed: %s -> %s", |
373 | link_state_to_string(link->state), | |
374 | link_state_to_string(state)); | |
375 | ||
e331e246 TG |
376 | link->state = state; |
377 | ||
378 | link_send_changed(link, "AdministrativeState", NULL); | |
9092113d | 379 | link_dirty(link); |
e331e246 TG |
380 | } |
381 | ||
2a99eed0 | 382 | int link_stop_engines(Link *link, bool may_keep_dhcp) { |
111bb8f9 TG |
383 | int r = 0, k; |
384 | ||
385 | assert(link); | |
386 | assert(link->manager); | |
387 | assert(link->manager->event); | |
388 | ||
80060352 ZJS |
389 | bool keep_dhcp = may_keep_dhcp && |
390 | link->network && | |
76a86ffd | 391 | !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */ |
80060352 ZJS |
392 | (link->manager->restarting || |
393 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
394 | ||
84add3cd | 395 | if (!keep_dhcp) { |
111bb8f9 | 396 | k = sd_dhcp_client_stop(link->dhcp_client); |
6a7a4e4d | 397 | if (k < 0) |
36c7d709 | 398 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
111bb8f9 TG |
399 | } |
400 | ||
2a99eed0 YW |
401 | k = sd_dhcp_server_stop(link->dhcp_server); |
402 | if (k < 0) | |
403 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); | |
404 | ||
35778343 | 405 | k = sd_lldp_rx_stop(link->lldp_rx); |
9cc65242 | 406 | if (k < 0) |
c01b9b87 YW |
407 | r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m"); |
408 | ||
409 | k = sd_lldp_tx_stop(link->lldp_tx); | |
410 | if (k < 0) | |
411 | r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m"); | |
9cc65242 | 412 | |
84add3cd YW |
413 | k = sd_ipv4ll_stop(link->ipv4ll); |
414 | if (k < 0) | |
415 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
dd43110f | 416 | |
76a86ffd | 417 | k = ipv4acd_stop(link); |
2488e4d9 YW |
418 | if (k < 0) |
419 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); | |
051e77ca | 420 | |
84add3cd YW |
421 | k = sd_dhcp6_client_stop(link->dhcp6_client); |
422 | if (k < 0) | |
423 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
4138fb2c | 424 | |
a27588d4 | 425 | k = dhcp_pd_remove(link, /* only_marked = */ false); |
2ffd6d73 YW |
426 | if (k < 0) |
427 | r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); | |
1633c457 | 428 | |
84add3cd YW |
429 | k = sd_ndisc_stop(link->ndisc); |
430 | if (k < 0) | |
431 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
4138fb2c | 432 | |
84add3cd YW |
433 | k = sd_radv_stop(link->radv); |
434 | if (k < 0) | |
435 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
7465dd22 | 436 | |
111bb8f9 TG |
437 | return r; |
438 | } | |
439 | ||
b22d8a00 | 440 | void link_enter_failed(Link *link) { |
ef1ba606 | 441 | assert(link); |
f882c247 | 442 | |
370e9930 | 443 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
444 | return; |
445 | ||
6a7a4e4d | 446 | log_link_warning(link, "Failed"); |
449f7554 | 447 | |
e331e246 | 448 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 449 | |
2a99eed0 | 450 | (void) link_stop_engines(link, false); |
f882c247 TG |
451 | } |
452 | ||
6accfd31 DA |
453 | void link_check_ready(Link *link) { |
454 | Address *a; | |
6accfd31 DA |
455 | |
456 | assert(link); | |
457 | ||
5f58af25 YW |
458 | if (link->state == LINK_STATE_CONFIGURED) |
459 | return; | |
460 | ||
d19b9939 YW |
461 | if (link->state != LINK_STATE_CONFIGURING) |
462 | return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
6accfd31 DA |
463 | |
464 | if (!link->network) | |
a7f07cbe | 465 | return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__); |
6accfd31 | 466 | |
7558f9e7 YW |
467 | if (!link->tc_configured) |
468 | return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
600b7898 | 469 | |
a7f07cbe YW |
470 | if (link->set_link_messages > 0) |
471 | return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__); | |
472 | ||
473 | if (!link->activated) | |
474 | return (void) log_link_debug(link, "%s(): link is not activated.", __func__); | |
475 | ||
7558f9e7 YW |
476 | if (link->iftype == ARPHRD_CAN) { |
477 | /* let's shortcut things for CAN which doesn't need most of checks below. */ | |
478 | link_set_state(link, LINK_STATE_CONFIGURED); | |
479 | return; | |
480 | } | |
481 | ||
879377ca YW |
482 | if (!link->stacked_netdevs_created) |
483 | return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__); | |
484 | ||
76c5a0f2 | 485 | if (!link->static_addresses_configured) |
d19b9939 | 486 | return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
6accfd31 | 487 | |
90e74a66 | 488 | SET_FOREACH(a, link->addresses) |
39373cb9 YW |
489 | if (!address_is_ready(a)) { |
490 | _cleanup_free_ char *str = NULL; | |
491 | ||
5380707a | 492 | (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str); |
3b6a3bde | 493 | return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__, strna(str)); |
39373cb9 | 494 | } |
6aa5773b | 495 | |
354bc760 YW |
496 | if (!link->static_address_labels_configured) |
497 | return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__); | |
498 | ||
e5b35bf6 YW |
499 | if (!link->static_bridge_fdb_configured) |
500 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
501 | ||
ff9e0783 YW |
502 | if (!link->static_bridge_mdb_configured) |
503 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
504 | ||
fdeba3f5 YW |
505 | if (!link->static_ipv6_proxy_ndp_configured) |
506 | return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__); | |
507 | ||
40ca350e YW |
508 | if (!link->static_neighbors_configured) |
509 | return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
510 | ||
d19b9939 YW |
511 | if (!link->static_nexthops_configured) |
512 | return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
c16c7808 | 513 | |
76c5a0f2 YW |
514 | if (!link->static_routes_configured) |
515 | return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
516 | ||
0e5ef6be | 517 | if (!link->static_routing_policy_rules_configured) |
d19b9939 | 518 | return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
6accfd31 | 519 | |
d19b9939 YW |
520 | if (!link->sr_iov_configured) |
521 | return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
518cd6b5 | 522 | |
4bcb8625 YW |
523 | /* IPv6LL is assigned after the link gains its carrier. */ |
524 | if (!link->network->configure_without_carrier && | |
525 | link_ipv6ll_enabled(link) && | |
526 | !in6_addr_is_set(&link->ipv6ll_address)) | |
527 | return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); | |
528 | ||
3b6a3bde YW |
529 | bool has_dynamic_address = false; |
530 | SET_FOREACH(a, link->addresses) { | |
531 | if (address_is_marked(a)) | |
532 | continue; | |
533 | if (!address_exists(a)) | |
534 | continue; | |
535 | if (IN_SET(a->source, | |
d9098371 YW |
536 | NETWORK_CONFIG_SOURCE_IPV4LL, |
537 | NETWORK_CONFIG_SOURCE_DHCP4, | |
538 | NETWORK_CONFIG_SOURCE_DHCP6, | |
a27588d4 | 539 | NETWORK_CONFIG_SOURCE_DHCP_PD, |
d9098371 | 540 | NETWORK_CONFIG_SOURCE_NDISC)) { |
3b6a3bde | 541 | has_dynamic_address = true; |
4bcb8625 YW |
542 | break; |
543 | } | |
3b6a3bde | 544 | } |
50550722 | 545 | |
3b6a3bde | 546 | if ((link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || |
a27588d4 | 547 | (link_dhcp_pd_is_enabled(link) && link->network->dhcp_pd_assign)) && !has_dynamic_address) |
4bcb8625 | 548 | /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ |
a27588d4 | 549 | return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__); |
4bcb8625 YW |
550 | |
551 | /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */ | |
3b6a3bde | 552 | if (link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || |
a27588d4 | 553 | link_dhcp6_enabled(link) || link_dhcp_pd_is_enabled(link) || |
3b6a3bde YW |
554 | (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link))) { |
555 | ||
556 | if (!link->ipv4ll_address_configured && !link->dhcp4_configured && | |
a27588d4 | 557 | !link->dhcp6_configured && !link->dhcp_pd_configured && !link->ndisc_configured) |
4bcb8625 YW |
558 | /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */ |
559 | return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); | |
560 | ||
a27588d4 | 561 | log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s", |
4bcb8625 | 562 | __func__, |
4bcb8625 | 563 | yes_no(link->ipv4ll_address_configured), |
3b6a3bde YW |
564 | yes_no(link->dhcp4_configured), |
565 | yes_no(link->dhcp6_configured), | |
a27588d4 | 566 | yes_no(link->dhcp_pd_configured), |
3b6a3bde | 567 | yes_no(link->ndisc_configured)); |
463797c1 | 568 | } |
6accfd31 | 569 | |
29836c16 | 570 | link_set_state(link, LINK_STATE_CONFIGURED); |
6accfd31 DA |
571 | } |
572 | ||
97108953 | 573 | static int link_request_static_configs(Link *link) { |
f882c247 TG |
574 | int r; |
575 | ||
576 | assert(link); | |
577 | assert(link->network); | |
f5be5601 | 578 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 579 | |
354bc760 | 580 | r = link_request_static_addresses(link); |
0e5ef6be YW |
581 | if (r < 0) |
582 | return r; | |
583 | ||
354bc760 | 584 | r = link_request_static_address_labels(link); |
f3ef324d YW |
585 | if (r < 0) |
586 | return r; | |
e4a71bf3 | 587 | |
e5b35bf6 YW |
588 | r = link_request_static_bridge_fdb(link); |
589 | if (r < 0) | |
590 | return r; | |
591 | ||
9a038aac YW |
592 | r = link_request_static_bridge_mdb(link); |
593 | if (r < 0) | |
594 | return r; | |
595 | ||
fdeba3f5 YW |
596 | r = link_request_static_ipv6_proxy_ndp_addresses(link); |
597 | if (r < 0) | |
598 | return r; | |
599 | ||
40ca350e | 600 | r = link_request_static_neighbors(link); |
682c65b0 YW |
601 | if (r < 0) |
602 | return r; | |
bd6379ec | 603 | |
76c5a0f2 | 604 | r = link_request_static_nexthops(link, false); |
fe2bc17c YW |
605 | if (r < 0) |
606 | return r; | |
f882c247 | 607 | |
76c5a0f2 YW |
608 | r = link_request_static_routes(link, false); |
609 | if (r < 0) | |
610 | return r; | |
611 | ||
612 | r = link_request_static_routing_policy_rules(link); | |
5ae0fb7f YW |
613 | if (r < 0) |
614 | return r; | |
d4cdbea5 | 615 | |
f882c247 TG |
616 | return 0; |
617 | } | |
618 | ||
1187fc33 YW |
619 | static int link_request_stacked_netdevs(Link *link) { |
620 | NetDev *netdev; | |
e16e4b3b DS |
621 | int r; |
622 | ||
623 | assert(link); | |
624 | ||
1187fc33 YW |
625 | link->stacked_netdevs_created = false; |
626 | link->stacked_netdevs_after_configured_created = false; | |
e16e4b3b | 627 | |
1187fc33 | 628 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
b14686ff | 629 | r = link_request_stacked_netdev(link, netdev); |
1187fc33 YW |
630 | if (r < 0) |
631 | return r; | |
632 | } | |
e16e4b3b | 633 | |
bb916f35 | 634 | if (link->create_stacked_netdev_messages == 0) { |
1187fc33 | 635 | link->stacked_netdevs_created = true; |
bb916f35 YW |
636 | link_check_ready(link); |
637 | } | |
1187fc33 YW |
638 | if (link->create_stacked_netdev_after_configured_messages == 0) |
639 | link->stacked_netdevs_after_configured_created = true; | |
e16e4b3b DS |
640 | |
641 | return 0; | |
642 | } | |
643 | ||
8566df79 | 644 | static int link_acquire_dynamic_ipv6_conf(Link *link) { |
e7ab854c TG |
645 | int r; |
646 | ||
647 | assert(link); | |
648 | ||
0f96a823 YW |
649 | r = radv_start(link); |
650 | if (r < 0) | |
651 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m"); | |
7465dd22 | 652 | |
294f129b YW |
653 | r = ndisc_start(link); |
654 | if (r < 0) | |
655 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
cd305af1 | 656 | |
294f129b YW |
657 | r = dhcp6_start(link); |
658 | if (r < 0) | |
659 | return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); | |
cd305af1 | 660 | |
e7ab854c TG |
661 | return 0; |
662 | } | |
663 | ||
8566df79 | 664 | static int link_acquire_dynamic_ipv4_conf(Link *link) { |
ff254138 TG |
665 | int r; |
666 | ||
667 | assert(link); | |
ff254138 TG |
668 | assert(link->manager); |
669 | assert(link->manager->event); | |
670 | ||
0107b769 | 671 | if (link->dhcp_client) { |
294f129b | 672 | r = dhcp4_start(link); |
0107b769 | 673 | if (r < 0) |
294f129b | 674 | return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
0107b769 | 675 | |
ccffa166 | 676 | log_link_debug(link, "Acquiring DHCPv4 lease."); |
5c1d3fc9 | 677 | |
ccffa166 | 678 | } else if (link->ipv4ll) { |
5c1d3fc9 | 679 | r = sd_ipv4ll_start(link->ipv4ll); |
6a7a4e4d LP |
680 | if (r < 0) |
681 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
ccffa166 YW |
682 | |
683 | log_link_debug(link, "Acquiring IPv4 link-local address."); | |
5c1d3fc9 UTL |
684 | } |
685 | ||
ab486ef4 YW |
686 | if (link->dhcp_server) { |
687 | r = sd_dhcp_server_start(link->dhcp_server); | |
688 | if (r < 0) | |
689 | return log_link_warning_errno(link, r, "Could not start DHCP server: %m"); | |
690 | } | |
691 | ||
76a86ffd YW |
692 | r = ipv4acd_start(link); |
693 | if (r < 0) | |
694 | return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m"); | |
695 | ||
6fc25497 SS |
696 | return 0; |
697 | } | |
698 | ||
8566df79 | 699 | static int link_acquire_dynamic_conf(Link *link) { |
6fc25497 SS |
700 | int r; |
701 | ||
702 | assert(link); | |
0f96a823 | 703 | assert(link->network); |
6fc25497 | 704 | |
8566df79 | 705 | r = link_acquire_dynamic_ipv4_conf(link); |
6fc25497 SS |
706 | if (r < 0) |
707 | return r; | |
708 | ||
94876904 | 709 | if (in6_addr_is_set(&link->ipv6ll_address)) { |
8566df79 | 710 | r = link_acquire_dynamic_ipv6_conf(link); |
6fc25497 SS |
711 | if (r < 0) |
712 | return r; | |
713 | } | |
714 | ||
a27588d4 | 715 | if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) { |
0f96a823 YW |
716 | /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be |
717 | * configured, and RADV may not be configured yet here. Only acquire subnet prefix when | |
718 | * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the | |
719 | * below will be called in radv_start(). */ | |
a27588d4 | 720 | r = dhcp_request_prefix_delegation(link); |
0f96a823 | 721 | if (r < 0) |
a27588d4 | 722 | return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m"); |
0f96a823 YW |
723 | } |
724 | ||
c01b9b87 YW |
725 | if (link->lldp_tx) { |
726 | r = sd_lldp_tx_start(link->lldp_tx); | |
727 | if (r < 0) | |
728 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
729 | } | |
8e1ad1ea | 730 | |
35778343 YW |
731 | if (link->lldp_rx) { |
732 | r = sd_lldp_rx_start(link->lldp_rx); | |
f8549910 YW |
733 | if (r < 0) |
734 | return log_link_warning_errno(link, r, "Failed to start LLDP client: %m"); | |
735 | } | |
736 | ||
ff254138 TG |
737 | return 0; |
738 | } | |
739 | ||
7657ec3e | 740 | int link_ipv6ll_gained(Link *link) { |
0c9ee5d5 | 741 | int r; |
deb2e523 | 742 | |
0c9ee5d5 | 743 | assert(link); |
deb2e523 | 744 | |
0c9ee5d5 | 745 | log_link_info(link, "Gained IPv6LL"); |
deb2e523 | 746 | |
7657ec3e YW |
747 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
748 | return 0; | |
0c9ee5d5 | 749 | |
7657ec3e YW |
750 | r = link_acquire_dynamic_ipv6_conf(link); |
751 | if (r < 0) | |
752 | return r; | |
0c9ee5d5 | 753 | |
7657ec3e | 754 | link_check_ready(link); |
0c9ee5d5 | 755 | return 0; |
deb2e523 TG |
756 | } |
757 | ||
112a0972 | 758 | int link_handle_bound_to_list(Link *link) { |
0d4ad91d AR |
759 | bool required_up = false; |
760 | bool link_is_up = false; | |
852a3916 | 761 | Link *l; |
0d4ad91d AR |
762 | |
763 | assert(link); | |
764 | ||
ad82f0c3 YW |
765 | /* If at least one interface in bound_to_links has carrier, then make this interface up. |
766 | * If all interfaces in bound_to_links do not, then make this interface down. */ | |
767 | ||
0d4ad91d AR |
768 | if (hashmap_isempty(link->bound_to_links)) |
769 | return 0; | |
770 | ||
771 | if (link->flags & IFF_UP) | |
772 | link_is_up = true; | |
773 | ||
852a3916 | 774 | HASHMAP_FOREACH(l, link->bound_to_links) |
0d4ad91d AR |
775 | if (link_has_carrier(l)) { |
776 | required_up = true; | |
777 | break; | |
778 | } | |
779 | ||
852a3916 | 780 | if (!required_up && link_is_up) |
68f52063 | 781 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
852a3916 | 782 | if (required_up && !link_is_up) |
68f52063 | 783 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0d4ad91d AR |
784 | |
785 | return 0; | |
786 | } | |
787 | ||
788 | static int link_handle_bound_by_list(Link *link) { | |
0d4ad91d AR |
789 | Link *l; |
790 | int r; | |
791 | ||
792 | assert(link); | |
793 | ||
ad82f0c3 YW |
794 | /* Update up or down state of interfaces which depend on this interface's carrier state. */ |
795 | ||
0d4ad91d AR |
796 | if (hashmap_isempty(link->bound_by_links)) |
797 | return 0; | |
798 | ||
852a3916 | 799 | HASHMAP_FOREACH(l, link->bound_by_links) { |
0d4ad91d AR |
800 | r = link_handle_bound_to_list(l); |
801 | if (r < 0) | |
802 | return r; | |
803 | } | |
804 | ||
805 | return 0; | |
806 | } | |
807 | ||
808 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
809 | int r; | |
810 | ||
811 | assert(link); | |
812 | assert(carrier); | |
813 | ||
814 | if (link == carrier) | |
815 | return 0; | |
816 | ||
817 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
818 | return 0; | |
819 | ||
190b3b5c | 820 | r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
0d4ad91d AR |
821 | if (r < 0) |
822 | return r; | |
823 | ||
9092113d YW |
824 | link_dirty(link); |
825 | ||
0d4ad91d AR |
826 | return 0; |
827 | } | |
828 | ||
829 | static int link_new_bound_by_list(Link *link) { | |
830 | Manager *m; | |
831 | Link *carrier; | |
0d4ad91d | 832 | int r; |
0d4ad91d AR |
833 | |
834 | assert(link); | |
835 | assert(link->manager); | |
836 | ||
837 | m = link->manager; | |
838 | ||
6eab614d | 839 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
0d4ad91d AR |
840 | if (!carrier->network) |
841 | continue; | |
842 | ||
843 | if (strv_isempty(carrier->network->bind_carrier)) | |
844 | continue; | |
845 | ||
191a3f16 | 846 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
0d4ad91d AR |
847 | r = link_put_carrier(link, carrier, &link->bound_by_links); |
848 | if (r < 0) | |
849 | return r; | |
0d4ad91d AR |
850 | } |
851 | } | |
852 | ||
90e74a66 | 853 | HASHMAP_FOREACH(carrier, link->bound_by_links) { |
0d4ad91d AR |
854 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
855 | if (r < 0) | |
856 | return r; | |
0d4ad91d AR |
857 | } |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | static int link_new_bound_to_list(Link *link) { | |
863 | Manager *m; | |
864 | Link *carrier; | |
0d4ad91d | 865 | int r; |
0d4ad91d AR |
866 | |
867 | assert(link); | |
868 | assert(link->manager); | |
869 | ||
870 | if (!link->network) | |
871 | return 0; | |
872 | ||
873 | if (strv_isempty(link->network->bind_carrier)) | |
874 | return 0; | |
875 | ||
876 | m = link->manager; | |
877 | ||
6eab614d | 878 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
191a3f16 | 879 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
0d4ad91d AR |
880 | r = link_put_carrier(link, carrier, &link->bound_to_links); |
881 | if (r < 0) | |
882 | return r; | |
0d4ad91d AR |
883 | } |
884 | } | |
885 | ||
852a3916 | 886 | HASHMAP_FOREACH(carrier, link->bound_to_links) { |
0d4ad91d AR |
887 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
888 | if (r < 0) | |
889 | return r; | |
0d4ad91d AR |
890 | } |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static int link_new_carrier_maps(Link *link) { | |
896 | int r; | |
897 | ||
898 | r = link_new_bound_by_list(link); | |
899 | if (r < 0) | |
900 | return r; | |
901 | ||
902 | r = link_handle_bound_by_list(link); | |
903 | if (r < 0) | |
904 | return r; | |
905 | ||
906 | r = link_new_bound_to_list(link); | |
907 | if (r < 0) | |
908 | return r; | |
909 | ||
852a3916 | 910 | return link_handle_bound_to_list(link); |
0d4ad91d AR |
911 | } |
912 | ||
913 | static void link_free_bound_to_list(Link *link) { | |
9092113d | 914 | bool updated = false; |
0d4ad91d | 915 | Link *bound_to; |
0d4ad91d | 916 | |
9092113d YW |
917 | assert(link); |
918 | ||
919 | while ((bound_to = hashmap_steal_first(link->bound_to_links))) { | |
920 | updated = true; | |
0d4ad91d AR |
921 | |
922 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
84de38c5 | 923 | link_dirty(bound_to); |
0d4ad91d AR |
924 | } |
925 | ||
9092113d YW |
926 | if (updated) |
927 | link_dirty(link); | |
0d4ad91d AR |
928 | } |
929 | ||
930 | static void link_free_bound_by_list(Link *link) { | |
9092113d | 931 | bool updated = false; |
0d4ad91d | 932 | Link *bound_by; |
0d4ad91d | 933 | |
9092113d YW |
934 | assert(link); |
935 | ||
936 | while ((bound_by = hashmap_steal_first(link->bound_by_links))) { | |
937 | updated = true; | |
0d4ad91d AR |
938 | |
939 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
84de38c5 | 940 | link_dirty(bound_by); |
0d4ad91d AR |
941 | link_handle_bound_to_list(bound_by); |
942 | } | |
943 | } | |
944 | ||
9092113d YW |
945 | if (updated) |
946 | link_dirty(link); | |
0d4ad91d AR |
947 | } |
948 | ||
949 | static void link_free_carrier_maps(Link *link) { | |
0d4ad91d AR |
950 | assert(link); |
951 | ||
9092113d YW |
952 | link_free_bound_to_list(link); |
953 | link_free_bound_by_list(link); | |
0d4ad91d AR |
954 | } |
955 | ||
81357285 | 956 | static int link_append_to_master(Link *link) { |
5f707e12 YW |
957 | Link *master; |
958 | int r; | |
959 | ||
960 | assert(link); | |
5f707e12 | 961 | |
81357285 YW |
962 | /* - The link may have no master. |
963 | * - RTM_NEWLINK message about master interface may not be received yet. */ | |
964 | if (link_get_master(link, &master) < 0) | |
965 | return 0; | |
5f707e12 | 966 | |
de7fef4b | 967 | r = set_ensure_put(&master->slaves, NULL, link); |
38288f0b | 968 | if (r <= 0) |
5f707e12 YW |
969 | return r; |
970 | ||
971 | link_ref(link); | |
972 | return 0; | |
973 | } | |
974 | ||
81357285 | 975 | static void link_drop_from_master(Link *link) { |
5f707e12 YW |
976 | Link *master; |
977 | ||
978 | assert(link); | |
979 | ||
81357285 | 980 | if (!link->manager) |
5f707e12 YW |
981 | return; |
982 | ||
81357285 | 983 | if (link_get_master(link, &master) < 0) |
5f707e12 YW |
984 | return; |
985 | ||
986 | link_unref(set_remove(master->slaves, link)); | |
987 | } | |
988 | ||
56001f02 YW |
989 | static void link_drop_requests(Link *link) { |
990 | Request *req; | |
991 | ||
992 | assert(link); | |
993 | assert(link->manager); | |
994 | ||
995 | ORDERED_SET_FOREACH(req, link->manager->request_queue) | |
996 | if (req->link == link) | |
997 | request_drop(req); | |
998 | } | |
999 | ||
cc2d7efc | 1000 | static Link *link_drop(Link *link) { |
0b54c870 YW |
1001 | char **n; |
1002 | ||
63130eb3 | 1003 | if (!link) |
cc2d7efc | 1004 | return NULL; |
0d4ad91d | 1005 | |
63130eb3 YW |
1006 | assert(link->manager); |
1007 | ||
0d4ad91d AR |
1008 | link_set_state(link, LINK_STATE_LINGER); |
1009 | ||
63130eb3 YW |
1010 | /* Drop all references from other links and manager. Note that async netlink calls may have |
1011 | * references to the link, and they will be dropped when we receive replies. */ | |
1012 | ||
56001f02 YW |
1013 | link_drop_requests(link); |
1014 | ||
0d4ad91d AR |
1015 | link_free_carrier_maps(link); |
1016 | ||
81357285 | 1017 | link_drop_from_master(link); |
5f707e12 | 1018 | |
4c78dc17 YW |
1019 | if (link->state_file) |
1020 | (void) unlink(link->state_file); | |
1021 | ||
63130eb3 YW |
1022 | link_clean(link); |
1023 | ||
0b54c870 YW |
1024 | STRV_FOREACH(n, link->alternative_names) |
1025 | hashmap_remove(link->manager->links_by_name, *n); | |
0b54c870 YW |
1026 | hashmap_remove(link->manager->links_by_name, link->ifname); |
1027 | ||
fe321d45 | 1028 | /* bonding master and its slaves have the same hardware address. */ |
e74f1d07 | 1029 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 | 1030 | |
63130eb3 | 1031 | /* The following must be called at last. */ |
6eab614d | 1032 | assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link); |
cc2d7efc | 1033 | return link_unref(link); |
0d4ad91d AR |
1034 | } |
1035 | ||
5e5b137a | 1036 | static int link_drop_foreign_config(Link *link) { |
0b81225e YW |
1037 | int k, r; |
1038 | ||
1039 | assert(link); | |
1040 | assert(link->manager); | |
5e5b137a | 1041 | |
5e3bb5da YW |
1042 | /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want |
1043 | * to remove loopback address or addresses used for root NFS. */ | |
1044 | ||
1045 | if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
1046 | return 0; | |
1047 | if (FLAGS_SET(link->flags, IFF_LOOPBACK)) | |
1048 | return 0; | |
1049 | if (link->network->keep_configuration == KEEP_CONFIGURATION_YES) | |
1050 | return 0; | |
1051 | ||
e36d601c | 1052 | r = link_drop_foreign_routes(link); |
5e5b137a | 1053 | |
e36d601c | 1054 | k = link_drop_foreign_nexthops(link); |
0b81225e YW |
1055 | if (k < 0 && r >= 0) |
1056 | r = k; | |
1057 | ||
e36d601c | 1058 | k = link_drop_foreign_addresses(link); |
0b81225e YW |
1059 | if (k < 0 && r >= 0) |
1060 | r = k; | |
d1bdafd2 | 1061 | |
e36d601c | 1062 | k = link_drop_foreign_neighbors(link); |
25b82b6e YW |
1063 | if (k < 0 && r >= 0) |
1064 | r = k; | |
1065 | ||
0b81225e YW |
1066 | k = manager_drop_foreign_routing_policy_rules(link->manager); |
1067 | if (k < 0 && r >= 0) | |
1068 | r = k; | |
1069 | ||
1070 | return r; | |
5e5b137a TG |
1071 | } |
1072 | ||
3104883d | 1073 | static int link_drop_config(Link *link) { |
0b81225e YW |
1074 | int k, r; |
1075 | ||
1076 | assert(link); | |
1077 | assert(link->manager); | |
3104883d | 1078 | |
e36d601c | 1079 | r = link_drop_routes(link); |
3104883d | 1080 | |
e36d601c | 1081 | k = link_drop_nexthops(link); |
0b81225e YW |
1082 | if (k < 0 && r >= 0) |
1083 | r = k; | |
d1bdafd2 | 1084 | |
e36d601c | 1085 | k = link_drop_addresses(link); |
0b81225e YW |
1086 | if (k < 0 && r >= 0) |
1087 | r = k; | |
1088 | ||
e36d601c | 1089 | k = link_drop_neighbors(link); |
25b82b6e YW |
1090 | if (k < 0 && r >= 0) |
1091 | r = k; | |
1092 | ||
756f1f5f | 1093 | k = link_drop_routing_policy_rules(link); |
0b81225e YW |
1094 | if (k < 0 && r >= 0) |
1095 | r = k; | |
3104883d | 1096 | |
c69305ff LP |
1097 | ndisc_flush(link); |
1098 | ||
0b81225e | 1099 | return r; |
3104883d SS |
1100 | } |
1101 | ||
b4564f4e YW |
1102 | static void link_foreignize_config(Link *link) { |
1103 | assert(link); | |
1104 | assert(link->manager); | |
1105 | ||
1106 | link_foreignize_routes(link); | |
1107 | link_foreignize_nexthops(link); | |
1108 | link_foreignize_addresses(link); | |
1109 | link_foreignize_neighbors(link); | |
1110 | link_foreignize_routing_policy_rules(link); | |
1111 | } | |
1112 | ||
c3b94251 | 1113 | static int link_configure(Link *link) { |
4ecdcb07 YW |
1114 | int r; |
1115 | ||
ef1ba606 | 1116 | assert(link); |
b22d8a00 | 1117 | assert(link->network); |
bd08ce56 | 1118 | assert(link->state == LINK_STATE_INITIALIZED); |
a748b692 | 1119 | |
1187fc33 YW |
1120 | link_set_state(link, LINK_STATE_CONFIGURING); |
1121 | ||
34658df2 | 1122 | r = link_configure_traffic_control(link); |
4ecdcb07 YW |
1123 | if (r < 0) |
1124 | return r; | |
1125 | ||
7558f9e7 YW |
1126 | if (link->iftype == ARPHRD_CAN) { |
1127 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
1128 | r = link_request_to_set_can(link); | |
1129 | if (r < 0) | |
1130 | return r; | |
1131 | ||
1132 | return link_request_to_activate(link); | |
1133 | } | |
1134 | ||
518cd6b5 SS |
1135 | r = link_configure_sr_iov(link); |
1136 | if (r < 0) | |
1137 | return r; | |
1138 | ||
5e0534f1 | 1139 | r = link_set_sysctl(link); |
b69c3180 SS |
1140 | if (r < 0) |
1141 | return r; | |
8749cbcd | 1142 | |
d05c332c | 1143 | r = link_request_to_set_mac(link, /* allow_retry = */ true); |
e16e4b3b DS |
1144 | if (r < 0) |
1145 | return r; | |
1146 | ||
72e65e6f YW |
1147 | r = link_request_to_set_ipoib(link); |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
1187fc33 | 1151 | r = link_request_to_set_flags(link); |
e16e4b3b DS |
1152 | if (r < 0) |
1153 | return r; | |
1154 | ||
1187fc33 | 1155 | r = link_request_to_set_group(link); |
99d2baa2 SS |
1156 | if (r < 0) |
1157 | return r; | |
1158 | ||
1187fc33 YW |
1159 | r = link_configure_mtu(link); |
1160 | if (r < 0) | |
1161 | return r; | |
1162 | ||
1163 | r = link_request_to_set_addrgen_mode(link); | |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | ||
1167 | r = link_request_to_set_master(link); | |
1168 | if (r < 0) | |
1169 | return r; | |
1170 | ||
1171 | r = link_request_stacked_netdevs(link); | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | ||
1175 | r = link_request_to_set_bond(link); | |
1176 | if (r < 0) | |
1177 | return r; | |
1178 | ||
1179 | r = link_request_to_set_bridge(link); | |
1180 | if (r < 0) | |
1181 | return r; | |
1182 | ||
1183 | r = link_request_to_set_bridge_vlan(link); | |
1184 | if (r < 0) | |
1185 | return r; | |
1186 | ||
1187 | r = link_request_to_activate(link); | |
89fe6535 SS |
1188 | if (r < 0) |
1189 | return r; | |
1190 | ||
2ffd6d73 YW |
1191 | r = ipv4ll_configure(link); |
1192 | if (r < 0) | |
1193 | return r; | |
64b21ece | 1194 | |
ccffa166 | 1195 | r = link_request_dhcp4_client(link); |
2ffd6d73 YW |
1196 | if (r < 0) |
1197 | return r; | |
eb34d4af | 1198 | |
ccffa166 | 1199 | r = link_request_dhcp6_client(link); |
2ffd6d73 YW |
1200 | if (r < 0) |
1201 | return r; | |
f5a8c43f | 1202 | |
2ffd6d73 YW |
1203 | r = ndisc_configure(link); |
1204 | if (r < 0) | |
1205 | return r; | |
4138fb2c | 1206 | |
1d28a3cf YW |
1207 | r = link_request_dhcp_server(link); |
1208 | if (r < 0) | |
1209 | return r; | |
1210 | ||
a254fab2 | 1211 | r = link_request_radv(link); |
086b8853 YW |
1212 | if (r < 0) |
1213 | return r; | |
7465dd22 | 1214 | |
2ffd6d73 YW |
1215 | r = link_lldp_rx_configure(link); |
1216 | if (r < 0) | |
1217 | return r; | |
ce43e484 | 1218 | |
c01b9b87 YW |
1219 | r = link_lldp_tx_configure(link); |
1220 | if (r < 0) | |
1221 | return r; | |
1222 | ||
5e3bb5da YW |
1223 | r = link_drop_foreign_config(link); |
1224 | if (r < 0) | |
1225 | return r; | |
4c649652 | 1226 | |
1187fc33 YW |
1227 | r = link_request_static_configs(link); |
1228 | if (r < 0) | |
1229 | return r; | |
1230 | ||
1231 | if (!link_has_carrier(link)) | |
1232 | return 0; | |
1233 | ||
1234 | return link_acquire_dynamic_conf(link); | |
505f8da7 TG |
1235 | } |
1236 | ||
170e88c8 YW |
1237 | static int link_get_network(Link *link, Network **ret) { |
1238 | Network *network; | |
1a3caa49 | 1239 | int r; |
170e88c8 YW |
1240 | |
1241 | assert(link); | |
1242 | assert(link->manager); | |
1243 | assert(ret); | |
1244 | ||
1245 | ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { | |
1246 | bool warn = false; | |
1247 | ||
1a3caa49 | 1248 | r = net_match_config( |
170e88c8 YW |
1249 | &network->match, |
1250 | link->sd_device, | |
52135071 YW |
1251 | &link->hw_addr, |
1252 | &link->permanent_hw_addr, | |
170e88c8 YW |
1253 | link->driver, |
1254 | link->iftype, | |
1255 | link->ifname, | |
1256 | link->alternative_names, | |
1257 | link->wlan_iftype, | |
1258 | link->ssid, | |
1a3caa49 YW |
1259 | &link->bssid); |
1260 | if (r < 0) | |
1261 | return r; | |
1262 | if (r == 0) | |
170e88c8 YW |
1263 | continue; |
1264 | ||
1265 | if (network->match.ifname && link->sd_device) { | |
1266 | uint8_t name_assign_type = NET_NAME_UNKNOWN; | |
1267 | const char *attr; | |
1268 | ||
1269 | if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0) | |
1270 | (void) safe_atou8(attr, &name_assign_type); | |
1271 | ||
1272 | warn = name_assign_type == NET_NAME_ENUM; | |
1273 | } | |
1274 | ||
1275 | log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, | |
1276 | "found matching network '%s'%s.", | |
1277 | network->filename, | |
1278 | warn ? ", based on potentially unpredictable interface name" : ""); | |
1279 | ||
1280 | if (network->unmanaged) | |
1281 | return -ENOENT; | |
1282 | ||
1283 | *ret = network; | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | return -ENOENT; | |
1288 | } | |
1289 | ||
7f80fa12 | 1290 | static int link_reconfigure_impl(Link *link, bool force) { |
cb71e9c6 | 1291 | Network *network = NULL; |
ad932b15 YW |
1292 | int r; |
1293 | ||
5a1860f7 | 1294 | assert(link); |
572b21d9 | 1295 | |
170e88c8 | 1296 | r = link_get_network(link, &network); |
cb71e9c6 | 1297 | if (r < 0 && r != -ENOENT) |
ad932b15 YW |
1298 | return r; |
1299 | ||
99b8517c | 1300 | if (link->network == network && !force) |
ad932b15 YW |
1301 | return 0; |
1302 | ||
cb71e9c6 YW |
1303 | if (network) |
1304 | log_link_info(link, "Reconfiguring with %s.", network->filename); | |
1305 | else | |
1306 | log_link_info(link, "Unmanaging interface."); | |
ad932b15 YW |
1307 | |
1308 | /* Dropping old .network file */ | |
2a99eed0 | 1309 | r = link_stop_engines(link, false); |
572b21d9 | 1310 | if (r < 0) |
ad932b15 | 1311 | return r; |
ad932b15 | 1312 | |
19d9a5ad YW |
1313 | link_drop_requests(link); |
1314 | ||
b4564f4e YW |
1315 | if (network && !force) |
1316 | /* When a new/updated .network file is assigned, first make all configs (addresses, | |
1317 | * routes, and so on) foreign, and then drop unnecessary configs later by | |
1318 | * link_drop_foreign_config() in link_configure(). */ | |
1319 | link_foreignize_config(link); | |
1320 | else { | |
1321 | r = link_drop_config(link); | |
1322 | if (r < 0) | |
1323 | return r; | |
1324 | } | |
ad932b15 | 1325 | |
ad932b15 YW |
1326 | link_free_carrier_maps(link); |
1327 | link_free_engines(link); | |
1328 | link->network = network_unref(link->network); | |
1329 | ||
cb71e9c6 YW |
1330 | if (!network) { |
1331 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1332 | return 0; | |
1333 | } | |
1334 | ||
ad932b15 | 1335 | /* Then, apply new .network file */ |
9092113d | 1336 | link->network = network_ref(network); |
b156a95d | 1337 | link_update_operstate(link, true); |
9092113d | 1338 | link_dirty(link); |
ad932b15 YW |
1339 | |
1340 | r = link_new_carrier_maps(link); | |
1341 | if (r < 0) | |
1342 | return r; | |
1343 | ||
1344 | link_set_state(link, LINK_STATE_INITIALIZED); | |
61135582 | 1345 | link->activated = false; |
ad932b15 | 1346 | |
ad932b15 YW |
1347 | r = link_configure(link); |
1348 | if (r < 0) | |
1349 | return r; | |
1350 | ||
0e397560 | 1351 | return 1; |
ad932b15 YW |
1352 | } |
1353 | ||
96f5f9ef | 1354 | static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) { |
572b21d9 YW |
1355 | int r; |
1356 | ||
d09a179e YW |
1357 | assert(link); |
1358 | ||
5a1860f7 YW |
1359 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state"); |
1360 | if (r <= 0) | |
1361 | return r; | |
1362 | ||
7f80fa12 | 1363 | r = link_reconfigure_impl(link, force); |
d09a179e | 1364 | if (r < 0) { |
572b21d9 | 1365 | link_enter_failed(link); |
d09a179e YW |
1366 | return 0; |
1367 | } | |
572b21d9 | 1368 | |
d09a179e | 1369 | return r; |
572b21d9 YW |
1370 | } |
1371 | ||
5a1860f7 | 1372 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1373 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
5a1860f7 | 1374 | } |
572b21d9 | 1375 | |
5a1860f7 | 1376 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1377 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true); |
572b21d9 YW |
1378 | } |
1379 | ||
d09a179e | 1380 | static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
572b21d9 YW |
1381 | int r; |
1382 | ||
d09a179e YW |
1383 | assert(link); |
1384 | ||
96f5f9ef | 1385 | r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
d09a179e YW |
1386 | if (r != 0) |
1387 | return r; | |
1388 | ||
1389 | /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */ | |
1390 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) | |
1391 | return 0; | |
1392 | ||
1393 | /* re-request static configs, and restart engines. */ | |
1394 | r = link_stop_engines(link, false); | |
1395 | if (r < 0) { | |
1396 | link_enter_failed(link); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
1400 | r = link_acquire_dynamic_conf(link); | |
1401 | if (r < 0) { | |
1402 | link_enter_failed(link); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | r = link_request_static_configs(link); | |
1407 | if (r < 0) { | |
1408 | link_enter_failed(link); | |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) { | |
1416 | int r; | |
1417 | ||
1418 | assert(link); | |
1419 | assert(callback); | |
1420 | ||
8bceafa7 | 1421 | /* When link in pending or initialized state, then link_configure() will be called. To prevent |
f8dd4077 ZJS |
1422 | * the function from being called multiple times simultaneously, refuse to reconfigure the |
1423 | * interface in these cases. */ | |
8bceafa7 | 1424 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
f8dd4077 | 1425 | return 0; /* 0 means no-op. */ |
2c0d7ed3 | 1426 | |
d09a179e | 1427 | r = link_call_getlink(link, callback); |
572b21d9 YW |
1428 | if (r < 0) |
1429 | return r; | |
1430 | ||
8bceafa7 | 1431 | return 1; /* 1 means the interface will be reconfigured. */ |
572b21d9 YW |
1432 | } |
1433 | ||
d09a179e YW |
1434 | int link_reconfigure(Link *link, bool force) { |
1435 | return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler); | |
1436 | } | |
1437 | ||
1438 | int link_reconfigure_after_sleep(Link *link) { | |
1439 | return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler); | |
1440 | } | |
1441 | ||
e6bf7774 | 1442 | static int link_initialized_and_synced(Link *link) { |
505f8da7 | 1443 | Network *network; |
505f8da7 TG |
1444 | int r; |
1445 | ||
1446 | assert(link); | |
1447 | assert(link->ifname); | |
1448 | assert(link->manager); | |
1449 | ||
faa2e64f YW |
1450 | if (link->manager->test_mode) { |
1451 | log_link_debug(link, "Running in test mode, refusing to enter initialized state."); | |
1452 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1453 | return 0; | |
1454 | } | |
1455 | ||
bd08ce56 | 1456 | /* We may get called either from the asynchronous netlink callback, |
0d411b7f | 1457 | * or directly from link_check_initialized() if running in a container. */ |
bd08ce56 | 1458 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
4232cf04 | 1459 | return 0; |
505f8da7 | 1460 | |
6a7a4e4d | 1461 | log_link_debug(link, "Link state is up-to-date"); |
bd08ce56 | 1462 | link_set_state(link, LINK_STATE_INITIALIZED); |
505f8da7 | 1463 | |
0d4ad91d AR |
1464 | r = link_new_bound_by_list(link); |
1465 | if (r < 0) | |
1466 | return r; | |
1467 | ||
1468 | r = link_handle_bound_by_list(link); | |
1469 | if (r < 0) | |
1470 | return r; | |
1471 | ||
c4a03a56 | 1472 | if (!link->network) { |
170e88c8 | 1473 | r = link_get_network(link, &network); |
c4a03a56 | 1474 | if (r == -ENOENT) { |
29836c16 | 1475 | link_set_state(link, LINK_STATE_UNMANAGED); |
4232cf04 | 1476 | return 0; |
170e88c8 YW |
1477 | } |
1478 | if (r < 0) | |
c4a03a56 | 1479 | return r; |
505f8da7 | 1480 | |
c4a03a56 TG |
1481 | if (link->flags & IFF_LOOPBACK) { |
1482 | if (network->link_local != ADDRESS_FAMILY_NO) | |
1483 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
78c958f8 | 1484 | |
c4a03a56 TG |
1485 | if (network->dhcp != ADDRESS_FAMILY_NO) |
1486 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
78c958f8 | 1487 | |
c4a03a56 TG |
1488 | if (network->dhcp_server) |
1489 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
1490 | } | |
bd2efe92 | 1491 | |
9092113d | 1492 | link->network = network_ref(network); |
bcdcc596 | 1493 | link_update_operstate(link, false); |
9092113d | 1494 | link_dirty(link); |
c4a03a56 | 1495 | } |
505f8da7 | 1496 | |
0d4ad91d AR |
1497 | r = link_new_bound_to_list(link); |
1498 | if (r < 0) | |
1499 | return r; | |
1500 | ||
852a3916 | 1501 | return link_configure(link); |
505f8da7 TG |
1502 | } |
1503 | ||
302a796f | 1504 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4ff296b0 YW |
1505 | int r; |
1506 | ||
5a1860f7 YW |
1507 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized"); |
1508 | if (r <= 0) | |
0b54c870 | 1509 | return r; |
572b21d9 | 1510 | |
4ff296b0 YW |
1511 | r = link_initialized_and_synced(link); |
1512 | if (r < 0) | |
1513 | link_enter_failed(link); | |
5a1860f7 YW |
1514 | |
1515 | return 0; | |
e6bf7774 YW |
1516 | } |
1517 | ||
3be9d62a | 1518 | static int link_initialized(Link *link, sd_device *device) { |
4f561e8e | 1519 | assert(link); |
4f561e8e TG |
1520 | assert(device); |
1521 | ||
160203e9 YW |
1522 | /* Always replace with the new sd_device object. As the sysname (and possibly other properties |
1523 | * or sysattrs) may be outdated. */ | |
1524 | sd_device_ref(device); | |
1525 | sd_device_unref(link->sd_device); | |
1526 | link->sd_device = device; | |
4f561e8e | 1527 | |
160203e9 YW |
1528 | /* Do not ignore unamanaged state case here. If an interface is renamed after being once |
1529 | * configured, and the corresponding .network file has Name= in [Match] section, then the | |
1530 | * interface may be already in unmanaged state. See #20657. */ | |
1531 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED)) | |
679b3605 TG |
1532 | return 0; |
1533 | ||
79008bdd | 1534 | log_link_debug(link, "udev initialized link"); |
bd08ce56 | 1535 | link_set_state(link, LINK_STATE_INITIALIZED); |
4f561e8e | 1536 | |
3c9b8860 TG |
1537 | /* udev has initialized the link, but we don't know if we have yet |
1538 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1539 | * when it returns we know that the pending NEWLINKs have already been | |
1540 | * processed and that we are up-to-date */ | |
4f561e8e | 1541 | |
5a1860f7 | 1542 | return link_call_getlink(link, link_initialized_handler); |
cc2d7efc YW |
1543 | } |
1544 | ||
0d411b7f | 1545 | static int link_check_initialized(Link *link) { |
51517f9e | 1546 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
5a937ea2 | 1547 | int r; |
505f8da7 | 1548 | |
0d411b7f | 1549 | assert(link); |
505f8da7 | 1550 | |
0d411b7f | 1551 | if (path_is_read_only_fs("/sys") > 0) |
852a3916 | 1552 | /* no udev */ |
0d411b7f | 1553 | return link_initialized_and_synced(link); |
852a3916 YW |
1554 | |
1555 | /* udev should be around */ | |
0ac655a6 | 1556 | r = sd_device_new_from_ifindex(&device, link->ifindex); |
852a3916 YW |
1557 | if (r < 0) { |
1558 | log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); | |
1559 | return 0; | |
1560 | } | |
1561 | ||
1562 | r = sd_device_get_is_initialized(device); | |
0d411b7f YW |
1563 | if (r < 0) |
1564 | return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); | |
852a3916 YW |
1565 | if (r == 0) { |
1566 | /* not yet ready */ | |
1567 | log_link_debug(link, "link pending udev initialization..."); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
1571 | r = device_is_renaming(device); | |
0d411b7f YW |
1572 | if (r < 0) |
1573 | return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); | |
852a3916 YW |
1574 | if (r > 0) { |
1575 | log_link_debug(link, "Interface is being renamed, pending initialization."); | |
1576 | return 0; | |
4f561e8e | 1577 | } |
505f8da7 | 1578 | |
0d411b7f | 1579 | return link_initialized(link, device); |
a748b692 TG |
1580 | } |
1581 | ||
3be9d62a YW |
1582 | int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
1583 | sd_device_action_t action; | |
1584 | Manager *m = userdata; | |
1585 | Link *link = NULL; | |
1586 | int r, ifindex; | |
1587 | ||
1588 | assert(m); | |
1589 | assert(device); | |
1590 | ||
1591 | r = sd_device_get_action(device, &action); | |
1592 | if (r < 0) { | |
1593 | log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m"); | |
1594 | return 0; | |
1595 | } | |
1596 | ||
1597 | /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents | |
1598 | * are "positive" events in some form, i.e. inform us about a changed or new network interface, that | |
1599 | * still exists — and we are interested in that. */ | |
1600 | if (action == SD_DEVICE_REMOVE) | |
1601 | return 0; | |
1602 | ||
1603 | r = sd_device_get_ifindex(device, &ifindex); | |
1604 | if (r < 0) { | |
1605 | log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m", | |
1606 | device_action_to_string(action)); | |
1607 | return 0; | |
1608 | } | |
1609 | ||
1610 | r = device_is_renaming(device); | |
1611 | if (r < 0) { | |
4b9a8c2b | 1612 | log_device_debug_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m", |
3be9d62a YW |
1613 | device_action_to_string(action)); |
1614 | return 0; | |
1615 | } | |
1616 | if (r > 0) { | |
1617 | log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed."); | |
1618 | return 0; | |
1619 | } | |
1620 | ||
6eab614d | 1621 | r = link_get_by_index(m, ifindex, &link); |
3be9d62a | 1622 | if (r < 0) { |
4b9a8c2b | 1623 | log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); |
3be9d62a YW |
1624 | return 0; |
1625 | } | |
1626 | ||
4b9a8c2b YW |
1627 | r = link_initialized(link, device); |
1628 | if (r < 0) | |
1629 | link_enter_failed(link); | |
3be9d62a YW |
1630 | |
1631 | return 0; | |
1632 | } | |
1633 | ||
9c0a72f9 | 1634 | static int link_carrier_gained(Link *link) { |
6706ce2f | 1635 | bool force_reconfigure; |
9c0a72f9 TG |
1636 | int r; |
1637 | ||
1638 | assert(link); | |
1639 | ||
6706ce2f YW |
1640 | r = event_source_disable(link->carrier_lost_timer); |
1641 | if (r < 0) | |
1642 | log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m"); | |
1643 | ||
d9910948 YW |
1644 | /* If a wireless interface was connected to an access point, and the SSID is changed (that is, |
1645 | * both previous_ssid and ssid are non-NULL), then the connected wireless network could be | |
1646 | * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be | |
1647 | * restarted, and the correct network information will be gained. | |
1648 | * | |
1649 | * However, do not reconfigure the wireless interface forcibly if it was not connected to any | |
1650 | * access points previously (previous_ssid is NULL in this case). As, a .network file may be | |
1651 | * already assigned to the interface (in that case, the .network file does not have the SSID= | |
1652 | * setting in the [Match] section), and the interface is already being configured. Of course, | |
1653 | * there may exist another .network file with higher priority and a matching SSID= setting. But | |
1654 | * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag. | |
1655 | * | |
6706ce2f | 1656 | * For non-wireless interfaces, we have no way to detect the connected network change. So, |
d9910948 YW |
1657 | * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */ |
1658 | force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid); | |
6706ce2f YW |
1659 | link->previous_ssid = mfree(link->previous_ssid); |
1660 | ||
a72d2a7b | 1661 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
b7ac1284 YW |
1662 | /* At this stage, both wlan and link information should be up-to-date. Hence, |
1663 | * it is not necessary to call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or | |
1664 | * NL80211_CMD_GET_STATION commands, and simply call link_reconfigure_impl(). | |
1665 | * Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */ | |
6706ce2f | 1666 | r = link_reconfigure_impl(link, force_reconfigure); |
b7ac1284 YW |
1667 | if (r != 0) |
1668 | return r; | |
1669 | } | |
1670 | ||
aa9117c0 YW |
1671 | r = link_handle_bound_by_list(link); |
1672 | if (r < 0) | |
1673 | return r; | |
1674 | ||
600b7898 YW |
1675 | if (link->iftype == ARPHRD_CAN) |
1676 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 | 1677 | return 0; |
600b7898 | 1678 | |
b9ea3d2e | 1679 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
8566df79 | 1680 | r = link_acquire_dynamic_conf(link); |
f0269653 | 1681 | if (r < 0) |
9c0a72f9 | 1682 | return r; |
6fc25497 | 1683 | |
97108953 | 1684 | r = link_request_static_configs(link); |
6fc25497 SS |
1685 | if (r < 0) |
1686 | return r; | |
9c0a72f9 TG |
1687 | } |
1688 | ||
aa9117c0 | 1689 | return 0; |
9c0a72f9 TG |
1690 | } |
1691 | ||
6706ce2f YW |
1692 | static int link_carrier_lost_impl(Link *link) { |
1693 | int r, ret = 0; | |
1694 | ||
1695 | assert(link); | |
1696 | ||
1697 | link->previous_ssid = mfree(link->previous_ssid); | |
1698 | ||
1699 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1700 | return 0; | |
1701 | ||
1702 | if (!link->network) | |
1703 | return 0; | |
1704 | ||
1705 | r = link_stop_engines(link, false); | |
1706 | if (r < 0) | |
1707 | ret = r; | |
1708 | ||
1709 | r = link_drop_config(link); | |
1710 | if (r < 0 && ret >= 0) | |
1711 | ret = r; | |
1712 | ||
1713 | return ret; | |
1714 | } | |
1715 | ||
1716 | static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
1717 | Link *link = userdata; | |
1718 | int r; | |
1719 | ||
1720 | assert(link); | |
1721 | ||
1722 | r = link_carrier_lost_impl(link); | |
1723 | if (r < 0) { | |
1724 | log_link_warning_errno(link, r, "Failed to process carrier lost event: %m"); | |
1725 | link_enter_failed(link); | |
1726 | } | |
1727 | ||
1728 | return 0; | |
1729 | } | |
1730 | ||
9c0a72f9 TG |
1731 | static int link_carrier_lost(Link *link) { |
1732 | int r; | |
1733 | ||
1734 | assert(link); | |
1735 | ||
aa9117c0 YW |
1736 | r = link_handle_bound_by_list(link); |
1737 | if (r < 0) | |
1738 | return r; | |
93b4dab5 | 1739 | |
600b7898 YW |
1740 | if (link->iftype == ARPHRD_CAN) |
1741 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 YW |
1742 | return 0; |
1743 | ||
f1c22cf4 YW |
1744 | if (!link->network) |
1745 | return 0; | |
1746 | ||
6706ce2f | 1747 | if (link->network->ignore_carrier_loss_usec == USEC_INFINITY) |
aa9117c0 | 1748 | return 0; |
600b7898 | 1749 | |
6706ce2f YW |
1750 | if (link->network->ignore_carrier_loss_usec == 0) |
1751 | return link_carrier_lost_impl(link); | |
1752 | ||
1753 | return event_reset_time_relative(link->manager->event, | |
1754 | &link->carrier_lost_timer, | |
1755 | clock_boottime_or_monotonic(), | |
1756 | link->network->ignore_carrier_loss_usec, | |
1757 | 0, | |
1758 | link_carrier_lost_handler, | |
1759 | link, | |
1760 | 0, | |
1761 | "link-carrier-loss", | |
1762 | true); | |
0c9ee5d5 YW |
1763 | } |
1764 | ||
0c9ee5d5 YW |
1765 | static int link_admin_state_up(Link *link) { |
1766 | int r; | |
1767 | ||
1768 | assert(link); | |
1769 | ||
1770 | /* This is called every time an interface admin state changes to up; | |
1771 | * specifically, when IFF_UP flag changes from unset to set. */ | |
1772 | ||
1773 | if (!link->network) | |
1774 | return 0; | |
1775 | ||
899b0e5e | 1776 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { |
1a054a20 | 1777 | log_link_info(link, "Activation policy is \"always-down\", forcing link down."); |
712fd5d2 | 1778 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
0c9ee5d5 YW |
1779 | } |
1780 | ||
1781 | /* We set the ipv6 mtu after the device mtu, but the kernel resets | |
1782 | * ipv6 mtu on NETDEV_UP, so we need to reset it. */ | |
1783 | r = link_set_ipv6_mtu(link); | |
1784 | if (r < 0) | |
1785 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m"); | |
1786 | ||
1787 | return 0; | |
1788 | } | |
1789 | ||
1790 | static int link_admin_state_down(Link *link) { | |
1791 | assert(link); | |
1792 | ||
1793 | if (!link->network) | |
1794 | return 0; | |
1795 | ||
899b0e5e | 1796 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { |
1a054a20 | 1797 | log_link_info(link, "Activation policy is \"always-up\", forcing link up."); |
712fd5d2 | 1798 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0c9ee5d5 YW |
1799 | } |
1800 | ||
1801 | return 0; | |
1802 | } | |
1803 | ||
0c9ee5d5 YW |
1804 | static bool link_is_enslaved(Link *link) { |
1805 | if (link->flags & IFF_SLAVE) | |
0c9ee5d5 YW |
1806 | return true; |
1807 | ||
1f024462 | 1808 | if (link->master_ifindex > 0) |
0c9ee5d5 YW |
1809 | return true; |
1810 | ||
0c9ee5d5 YW |
1811 | return false; |
1812 | } | |
1813 | ||
1814 | static LinkAddressState address_state_from_scope(uint8_t scope) { | |
1815 | if (scope < RT_SCOPE_SITE) | |
1816 | /* universally accessible addresses found */ | |
1817 | return LINK_ADDRESS_STATE_ROUTABLE; | |
1818 | ||
1819 | if (scope < RT_SCOPE_HOST) | |
1820 | /* only link or site local addresses found */ | |
1821 | return LINK_ADDRESS_STATE_DEGRADED; | |
1822 | ||
1823 | /* no useful addresses found */ | |
1824 | return LINK_ADDRESS_STATE_OFF; | |
1825 | } | |
1826 | ||
1827 | void link_update_operstate(Link *link, bool also_update_master) { | |
1828 | LinkOperationalState operstate; | |
1829 | LinkCarrierState carrier_state; | |
1830 | LinkAddressState ipv4_address_state, ipv6_address_state, address_state; | |
1831 | LinkOnlineState online_state; | |
1832 | _cleanup_strv_free_ char **p = NULL; | |
1833 | uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE; | |
1834 | bool changed = false; | |
1835 | Address *address; | |
1836 | ||
1837 | assert(link); | |
1838 | ||
1839 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1840 | carrier_state = LINK_CARRIER_STATE_DORMANT; | |
1841 | else if (link_has_carrier(link)) { | |
1842 | if (link_is_enslaved(link)) | |
1843 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
1844 | else | |
1845 | carrier_state = LINK_CARRIER_STATE_CARRIER; | |
1846 | } else if (link->flags & IFF_UP) | |
1847 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; | |
1848 | else | |
1849 | carrier_state = LINK_CARRIER_STATE_OFF; | |
1850 | ||
1851 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { | |
1852 | Link *slave; | |
1853 | ||
1854 | SET_FOREACH(slave, link->slaves) { | |
1855 | link_update_operstate(slave, false); | |
1856 | ||
1857 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) | |
1858 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | SET_FOREACH(address, link->addresses) { | |
1863 | if (!address_is_ready(address)) | |
1864 | continue; | |
1865 | ||
1866 | if (address->family == AF_INET) | |
1867 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
1868 | ||
1869 | if (address->family == AF_INET6) | |
1870 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1871 | } | |
1872 | ||
0c9ee5d5 YW |
1873 | ipv4_address_state = address_state_from_scope(ipv4_scope); |
1874 | ipv6_address_state = address_state_from_scope(ipv6_scope); | |
1875 | address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope)); | |
1876 | ||
1877 | /* Mapping of address and carrier state vs operational state | |
1878 | * carrier state | |
1879 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1880 | * ------------------------------------------------------------------------------ | |
1881 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1882 | * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved | |
1883 | * routable | off | no-carrier | dormant | degraded-carrier | routable | routable | |
1884 | */ | |
1885 | ||
1886 | if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) | |
1887 | operstate = (LinkOperationalState) carrier_state; | |
1888 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
1889 | operstate = LINK_OPERSTATE_ROUTABLE; | |
1890 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
1891 | operstate = LINK_OPERSTATE_DEGRADED; | |
1892 | else | |
1893 | operstate = LINK_OPERSTATE_ENSLAVED; | |
1894 | ||
1895 | /* Only determine online state for managed links with RequiredForOnline=yes */ | |
1896 | if (!link->network || !link->network->required_for_online) | |
1897 | online_state = _LINK_ONLINE_STATE_INVALID; | |
1898 | else if (operstate < link->network->required_operstate_for_online.min || | |
1899 | operstate > link->network->required_operstate_for_online.max) | |
1900 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1901 | else { | |
1902 | AddressFamily required_family = link->network->required_family_for_online; | |
1903 | bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; | |
1904 | bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; | |
1905 | ||
1906 | /* The operational state is within the range required for online. | |
1907 | * If a particular address family is also required, we might revert | |
1908 | * to offline in the blocks below. */ | |
1909 | online_state = LINK_ONLINE_STATE_ONLINE; | |
1910 | ||
1911 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { | |
1912 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1913 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1914 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1915 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1916 | } | |
1917 | ||
1918 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { | |
1919 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1920 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1921 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1922 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | if (link->carrier_state != carrier_state) { | |
1927 | link->carrier_state = carrier_state; | |
1928 | changed = true; | |
1929 | if (strv_extend(&p, "CarrierState") < 0) | |
1930 | log_oom(); | |
1931 | } | |
1932 | ||
1933 | if (link->address_state != address_state) { | |
1934 | link->address_state = address_state; | |
1935 | changed = true; | |
1936 | if (strv_extend(&p, "AddressState") < 0) | |
1937 | log_oom(); | |
1938 | } | |
0d4ad91d | 1939 | |
0c9ee5d5 YW |
1940 | if (link->ipv4_address_state != ipv4_address_state) { |
1941 | link->ipv4_address_state = ipv4_address_state; | |
1942 | changed = true; | |
1943 | if (strv_extend(&p, "IPv4AddressState") < 0) | |
1944 | log_oom(); | |
1945 | } | |
9c0a72f9 | 1946 | |
0c9ee5d5 YW |
1947 | if (link->ipv6_address_state != ipv6_address_state) { |
1948 | link->ipv6_address_state = ipv6_address_state; | |
1949 | changed = true; | |
1950 | if (strv_extend(&p, "IPv6AddressState") < 0) | |
1951 | log_oom(); | |
1952 | } | |
9c0a72f9 | 1953 | |
0c9ee5d5 YW |
1954 | if (link->operstate != operstate) { |
1955 | link->operstate = operstate; | |
1956 | changed = true; | |
1957 | if (strv_extend(&p, "OperationalState") < 0) | |
1958 | log_oom(); | |
1959 | } | |
9c0a72f9 | 1960 | |
0c9ee5d5 YW |
1961 | if (link->online_state != online_state) { |
1962 | link->online_state = online_state; | |
1963 | changed = true; | |
1964 | if (strv_extend(&p, "OnlineState") < 0) | |
1965 | log_oom(); | |
1966 | } | |
9c0a72f9 | 1967 | |
0c9ee5d5 YW |
1968 | if (p) |
1969 | link_send_changed_strv(link, p); | |
1970 | if (changed) | |
1971 | link_dirty(link); | |
9c0a72f9 | 1972 | |
0c9ee5d5 YW |
1973 | if (also_update_master) { |
1974 | Link *master; | |
9c0a72f9 | 1975 | |
0c9ee5d5 YW |
1976 | if (link_get_master(link, &master) >= 0) |
1977 | link_update_operstate(master, true); | |
1978 | } | |
9c0a72f9 TG |
1979 | } |
1980 | ||
0c9ee5d5 YW |
1981 | #define FLAG_STRING(string, flag, old, new) \ |
1982 | (((old ^ new) & flag) \ | |
1983 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
1984 | : "") | |
1985 | ||
0d411b7f | 1986 | static int link_update_flags(Link *link, sd_netlink_message *message) { |
96f5f9ef | 1987 | bool link_was_admin_up, had_carrier; |
0c9ee5d5 YW |
1988 | uint8_t operstate; |
1989 | unsigned flags; | |
d236718c DS |
1990 | int r; |
1991 | ||
61135582 | 1992 | assert(link); |
0d411b7f | 1993 | assert(message); |
61135582 | 1994 | |
0d411b7f | 1995 | r = sd_rtnl_message_link_get_flags(message, &flags); |
0c9ee5d5 | 1996 | if (r < 0) |
0d411b7f | 1997 | return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m"); |
3be9d62a | 1998 | |
0d411b7f YW |
1999 | r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate); |
2000 | if (r == -ENODATA) | |
2001 | /* If we got a message without operstate, assume the state was unchanged. */ | |
0c9ee5d5 | 2002 | operstate = link->kernel_operstate; |
0d411b7f YW |
2003 | else if (r < 0) |
2004 | return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m"); | |
0c9ee5d5 | 2005 | |
0d411b7f | 2006 | if (link->flags == flags && link->kernel_operstate == operstate) |
61135582 DS |
2007 | return 0; |
2008 | ||
0c9ee5d5 YW |
2009 | if (link->flags != flags) { |
2010 | unsigned unknown_flags, unknown_flags_added, unknown_flags_removed; | |
61135582 | 2011 | |
0c9ee5d5 YW |
2012 | 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", |
2013 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
2014 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
2015 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
2016 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
2017 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
2018 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
2019 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
2020 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
2021 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
2022 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
2023 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
2024 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
2025 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
2026 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
2027 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
2028 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
2029 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
2030 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
2031 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
d236718c | 2032 | |
0c9ee5d5 YW |
2033 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
2034 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
2035 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
2036 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
2037 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
2038 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
2039 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
2040 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
d236718c | 2041 | |
0c9ee5d5 YW |
2042 | if (unknown_flags_added) |
2043 | log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added); | |
61135582 | 2044 | |
0c9ee5d5 YW |
2045 | if (unknown_flags_removed) |
2046 | log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed); | |
2047 | } | |
61135582 | 2048 | |
0d411b7f YW |
2049 | link_was_admin_up = link->flags & IFF_UP; |
2050 | had_carrier = link_has_carrier(link); | |
2051 | ||
0c9ee5d5 YW |
2052 | link->flags = flags; |
2053 | link->kernel_operstate = operstate; | |
36161cba | 2054 | |
0c9ee5d5 | 2055 | link_update_operstate(link, true); |
61135582 | 2056 | |
0d411b7f YW |
2057 | if (!link_was_admin_up && (link->flags & IFF_UP)) { |
2058 | log_link_info(link, "Link UP"); | |
22936833 | 2059 | |
0d411b7f YW |
2060 | r = link_admin_state_up(link); |
2061 | if (r < 0) | |
2062 | return r; | |
2063 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) { | |
2064 | log_link_info(link, "Link DOWN"); | |
0d4ad91d | 2065 | |
0d411b7f | 2066 | r = link_admin_state_down(link); |
0d4ad91d AR |
2067 | if (r < 0) |
2068 | return r; | |
7619683b TG |
2069 | } |
2070 | ||
0d411b7f YW |
2071 | if (!had_carrier && link_has_carrier(link)) { |
2072 | log_link_info(link, "Gained carrier"); | |
0d4ad91d | 2073 | |
0d411b7f | 2074 | r = link_carrier_gained(link); |
30de2b89 YW |
2075 | if (r < 0) |
2076 | return r; | |
0d411b7f YW |
2077 | } else if (had_carrier && !link_has_carrier(link)) { |
2078 | log_link_info(link, "Lost carrier"); | |
2079 | ||
2080 | r = link_carrier_lost(link); | |
0b54c870 YW |
2081 | if (r < 0) |
2082 | return r; | |
b8941f74 TG |
2083 | } |
2084 | ||
0d411b7f YW |
2085 | return 0; |
2086 | } | |
afe7fd56 | 2087 | |
0d411b7f YW |
2088 | static int link_update_master(Link *link, sd_netlink_message *message) { |
2089 | int master_ifindex, r; | |
7465dd22 | 2090 | |
0d411b7f YW |
2091 | assert(link); |
2092 | assert(message); | |
69629de9 | 2093 | |
0d411b7f YW |
2094 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex); |
2095 | if (r == -ENODATA) | |
2096 | return 0; | |
2097 | if (r < 0) | |
2098 | return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m"); | |
807667f7 | 2099 | |
571bf1aa YW |
2100 | if (master_ifindex == link->ifindex) |
2101 | master_ifindex = 0; | |
2102 | ||
0d411b7f YW |
2103 | if (master_ifindex == link->master_ifindex) |
2104 | return 0; | |
807667f7 | 2105 | |
0d411b7f YW |
2106 | if (link->master_ifindex == 0) |
2107 | log_link_debug(link, "Joined to master interface: %i", master_ifindex); | |
2108 | else if (master_ifindex == 0) | |
2109 | log_link_debug(link, "Leaved from master interface: %i", link->master_ifindex); | |
2110 | else | |
2111 | log_link_debug(link, "Master interface is changed: %i → %i", link->master_ifindex, master_ifindex); | |
807667f7 | 2112 | |
0d411b7f | 2113 | link_drop_from_master(link); |
807667f7 | 2114 | |
0d411b7f | 2115 | link->master_ifindex = master_ifindex; |
413708d1 | 2116 | |
0d411b7f YW |
2117 | r = link_append_to_master(link); |
2118 | if (r < 0) | |
2119 | return log_link_debug_errno(link, r, "Failed to append link to master: %m"); | |
7465dd22 | 2120 | |
0d411b7f YW |
2121 | return 0; |
2122 | } | |
807667f7 | 2123 | |
0d411b7f | 2124 | static int link_update_hardware_address(Link *link, sd_netlink_message *message) { |
e2bacccd | 2125 | struct hw_addr_data addr; |
0d411b7f | 2126 | int r; |
d93d655c | 2127 | |
0d411b7f YW |
2128 | assert(link); |
2129 | assert(message); | |
dfc58b47 | 2130 | |
0d411b7f YW |
2131 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); |
2132 | if (r < 0 && r != -ENODATA) | |
2133 | return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m"); | |
4f882b2a | 2134 | |
e2bacccd | 2135 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr); |
0d411b7f YW |
2136 | if (r == -ENODATA) |
2137 | return 0; | |
2138 | if (r < 0) | |
fe321d45 | 2139 | return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m"); |
bb262ef0 | 2140 | |
e2bacccd | 2141 | if (hw_addr_equal(&link->hw_addr, &addr)) |
0d411b7f | 2142 | return 0; |
a61bb41c | 2143 | |
de0f1579 | 2144 | if (link->hw_addr.length == 0) |
e2bacccd | 2145 | log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr)); |
fe321d45 YW |
2146 | else { |
2147 | log_link_debug(link, "Hardware address is changed: %s → %s", | |
e2bacccd | 2148 | HW_ADDR_TO_STR(&link->hw_addr), HW_ADDR_TO_STR(&addr)); |
0d411b7f | 2149 | |
e74f1d07 | 2150 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 YW |
2151 | } |
2152 | ||
e2bacccd YW |
2153 | link->hw_addr = addr; |
2154 | ||
fe321d45 YW |
2155 | if (!hw_addr_is_null(&link->hw_addr)) { |
2156 | r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link); | |
2157 | if (r == -EEXIST && streq_ptr(link->kind, "bond")) | |
2158 | /* bonding master and its slaves have the same hardware address. */ | |
2159 | r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link); | |
2160 | if (r < 0) | |
2161 | log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m"); | |
2162 | } | |
0d411b7f | 2163 | |
76a86ffd YW |
2164 | r = ipv4ll_update_mac(link); |
2165 | if (r < 0) | |
2166 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); | |
2167 | ||
0d411b7f | 2168 | r = ipv4ll_update_mac(link); |
a61bb41c | 2169 | if (r < 0) |
0d411b7f | 2170 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
a61bb41c | 2171 | |
0d411b7f YW |
2172 | r = dhcp4_update_mac(link); |
2173 | if (r < 0) | |
2174 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
d236718c | 2175 | |
0d411b7f YW |
2176 | r = dhcp6_update_mac(link); |
2177 | if (r < 0) | |
2178 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
2179 | ||
2180 | r = radv_update_mac(link); | |
2181 | if (r < 0) | |
2182 | return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
2183 | ||
2184 | if (link->ndisc) { | |
ca2b7cd8 | 2185 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); |
d236718c | 2186 | if (r < 0) |
0d411b7f YW |
2187 | return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m"); |
2188 | } | |
d236718c | 2189 | |
35778343 YW |
2190 | if (link->lldp_rx) { |
2191 | r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether); | |
61135582 | 2192 | if (r < 0) |
c01b9b87 YW |
2193 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m"); |
2194 | } | |
2195 | ||
2196 | if (link->lldp_tx) { | |
2197 | r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether); | |
2198 | if (r < 0) | |
2199 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m"); | |
61135582 DS |
2200 | } |
2201 | ||
0d411b7f YW |
2202 | return 0; |
2203 | } | |
a61bb41c | 2204 | |
0d411b7f | 2205 | static int link_update_mtu(Link *link, sd_netlink_message *message) { |
717ba5fc | 2206 | uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX; |
0d411b7f | 2207 | int r; |
a61bb41c | 2208 | |
0d411b7f YW |
2209 | assert(link); |
2210 | assert(message); | |
2211 | ||
2212 | r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu); | |
2213 | if (r == -ENODATA) | |
2214 | return 0; | |
2215 | if (r < 0) | |
2216 | return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m"); | |
b5d0fd1e YW |
2217 | if (mtu == 0) |
2218 | return 0; | |
0d411b7f | 2219 | |
717ba5fc YW |
2220 | r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu); |
2221 | if (r < 0 && r != -ENODATA) | |
2222 | return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m"); | |
2223 | ||
2224 | r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu); | |
2225 | if (r < 0 && r != -ENODATA) | |
2226 | return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m"); | |
2227 | ||
717ba5fc YW |
2228 | if (max_mtu == 0) |
2229 | max_mtu = UINT32_MAX; | |
2230 | ||
2231 | link->min_mtu = min_mtu; | |
2232 | link->max_mtu = max_mtu; | |
2233 | ||
0d411b7f YW |
2234 | if (link->original_mtu == 0) { |
2235 | link->original_mtu = mtu; | |
717ba5fc YW |
2236 | log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2237 | link->original_mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2238 | } |
2239 | ||
717ba5fc YW |
2240 | if (link->mtu == mtu) |
2241 | return 0; | |
2242 | ||
b5d0fd1e YW |
2243 | if (link->mtu != 0) |
2244 | log_link_debug(link, "MTU is changed: %"PRIu32" → %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", | |
2245 | link->mtu, mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2246 | |
2247 | link->mtu = mtu; | |
2248 | ||
2249 | if (link->dhcp_client) { | |
2250 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
9c0a72f9 | 2251 | if (r < 0) |
0d411b7f YW |
2252 | return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m"); |
2253 | } | |
a61bb41c | 2254 | |
0d411b7f YW |
2255 | if (link->radv) { |
2256 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
9c0a72f9 | 2257 | if (r < 0) |
0d411b7f | 2258 | return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
a61bb41c TG |
2259 | } |
2260 | ||
2261 | return 0; | |
dd3efc09 | 2262 | } |
fe8db0c5 | 2263 | |
0d411b7f YW |
2264 | static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
2265 | _cleanup_strv_free_ char **altnames = NULL; | |
2266 | char **n; | |
2267 | int r; | |
2268 | ||
2269 | assert(link); | |
2270 | assert(message); | |
2271 | ||
2272 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); | |
50df02a7 YW |
2273 | if (r == -ENODATA) |
2274 | /* The message does not have IFLA_PROP_LIST container attribute. It does not means the | |
2275 | * interface has no alternative name. */ | |
2276 | return 0; | |
2277 | if (r < 0) | |
0d411b7f YW |
2278 | return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); |
2279 | ||
1b345c1e YW |
2280 | if (strv_equal(altnames, link->alternative_names)) |
2281 | return 0; | |
2282 | ||
0d411b7f YW |
2283 | STRV_FOREACH(n, link->alternative_names) |
2284 | hashmap_remove(link->manager->links_by_name, *n); | |
2285 | ||
2286 | strv_free_and_replace(link->alternative_names, altnames); | |
2287 | ||
2288 | STRV_FOREACH(n, link->alternative_names) { | |
2289 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); | |
2290 | if (r < 0) | |
2291 | return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m"); | |
2292 | } | |
2293 | ||
2294 | return 0; | |
2295 | } | |
2296 | ||
2297 | static int link_update_name(Link *link, sd_netlink_message *message) { | |
01afd0f7 | 2298 | char ifname_from_index[IF_NAMESIZE]; |
0d411b7f YW |
2299 | const char *ifname; |
2300 | int r; | |
2301 | ||
2302 | assert(link); | |
2303 | assert(message); | |
2304 | ||
2305 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
2306 | if (r == -ENODATA) | |
7802194a | 2307 | /* Hmm?? But ok. */ |
0d411b7f YW |
2308 | return 0; |
2309 | if (r < 0) | |
2310 | return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m"); | |
2311 | ||
2312 | if (streq(ifname, link->ifname)) | |
2313 | return 0; | |
2314 | ||
01afd0f7 YW |
2315 | r = format_ifname(link->ifindex, ifname_from_index); |
2316 | if (r < 0) | |
2317 | return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex); | |
176b8be1 YW |
2318 | |
2319 | if (!streq(ifname, ifname_from_index)) { | |
2320 | log_link_debug(link, "New interface name '%s' received from the kernel does not correspond " | |
2321 | "with the name currently configured on the actual interface '%s'. Ignoring.", | |
2322 | ifname, ifname_from_index); | |
2323 | return 0; | |
2324 | } | |
2325 | ||
0d411b7f YW |
2326 | log_link_info(link, "Interface name change detected, renamed to %s.", ifname); |
2327 | ||
2328 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
2329 | ||
2330 | r = free_and_strdup(&link->ifname, ifname); | |
2331 | if (r < 0) | |
2332 | return log_oom_debug(); | |
2333 | ||
2334 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link); | |
2335 | if (r < 0) | |
2336 | return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m"); | |
2337 | ||
54d1fdb2 YW |
2338 | if (link->dhcp_client) { |
2339 | r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname); | |
2340 | if (r < 0) | |
2341 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m"); | |
2342 | } | |
2343 | ||
2344 | if (link->dhcp6_client) { | |
2345 | r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname); | |
2346 | if (r < 0) | |
2347 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m"); | |
2348 | } | |
2349 | ||
2350 | if (link->ndisc) { | |
2351 | r = sd_ndisc_set_ifname(link->ndisc, link->ifname); | |
2352 | if (r < 0) | |
2353 | return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m"); | |
2354 | } | |
2355 | ||
2356 | if (link->dhcp_server) { | |
2357 | r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname); | |
2358 | if (r < 0) | |
2359 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m"); | |
2360 | } | |
2361 | ||
2362 | if (link->radv) { | |
2363 | r = sd_radv_set_ifname(link->radv, link->ifname); | |
2364 | if (r < 0) | |
2365 | return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m"); | |
2366 | } | |
2367 | ||
35778343 YW |
2368 | if (link->lldp_rx) { |
2369 | r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname); | |
54d1fdb2 | 2370 | if (r < 0) |
c01b9b87 YW |
2371 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m"); |
2372 | } | |
2373 | ||
2374 | if (link->lldp_tx) { | |
2375 | r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname); | |
2376 | if (r < 0) | |
2377 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m"); | |
54d1fdb2 YW |
2378 | } |
2379 | ||
2380 | if (link->ipv4ll) { | |
2381 | r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname); | |
2382 | if (r < 0) | |
2383 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m"); | |
2384 | } | |
2385 | ||
86173383 YW |
2386 | r = ipv4acd_set_ifname(link); |
2387 | if (r < 0) | |
2388 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m"); | |
54d1fdb2 | 2389 | |
0d411b7f YW |
2390 | return 0; |
2391 | } | |
2392 | ||
2393 | static int link_update(Link *link, sd_netlink_message *message) { | |
2394 | int r; | |
2395 | ||
2396 | assert(link); | |
2397 | assert(message); | |
2398 | ||
2399 | r = link_update_name(link, message); | |
2400 | if (r < 0) | |
2401 | return r; | |
2402 | ||
2403 | r = link_update_alternative_names(link, message); | |
2404 | if (r < 0) | |
2405 | return r; | |
2406 | ||
2407 | r = link_update_mtu(link, message); | |
2408 | if (r < 0) | |
2409 | return r; | |
2410 | ||
2411 | r = link_update_hardware_address(link, message); | |
2412 | if (r < 0) | |
2413 | return r; | |
2414 | ||
2415 | r = link_update_master(link, message); | |
2416 | if (r < 0) | |
2417 | return r; | |
2418 | ||
2419 | return link_update_flags(link, message); | |
2420 | } | |
2421 | ||
0c9ee5d5 YW |
2422 | static Link *link_drop_or_unref(Link *link) { |
2423 | if (!link) | |
2424 | return NULL; | |
2425 | if (!link->manager) | |
2426 | return link_unref(link); | |
2427 | return link_drop(link); | |
2428 | } | |
2429 | ||
2430 | DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); | |
2431 | ||
2432 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
0d411b7f | 2433 | _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL; |
0c9ee5d5 | 2434 | _cleanup_(link_drop_or_unrefp) Link *link = NULL; |
0c9ee5d5 YW |
2435 | unsigned short iftype; |
2436 | int r, ifindex; | |
0c9ee5d5 YW |
2437 | |
2438 | assert(manager); | |
2439 | assert(message); | |
2440 | assert(ret); | |
2441 | ||
0c9ee5d5 YW |
2442 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
2443 | if (r < 0) | |
0d411b7f | 2444 | return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m"); |
0c9ee5d5 | 2445 | else if (ifindex <= 0) |
0d411b7f | 2446 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex."); |
0c9ee5d5 YW |
2447 | |
2448 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
2449 | if (r < 0) | |
0d411b7f | 2450 | return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m"); |
0c9ee5d5 YW |
2451 | |
2452 | r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); | |
2453 | if (r < 0) | |
0d411b7f | 2454 | return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m"); |
0c9ee5d5 YW |
2455 | |
2456 | /* check for link kind */ | |
2457 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
2458 | if (r >= 0) { | |
0d411b7f YW |
2459 | r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); |
2460 | if (r < 0 && r != -ENODATA) | |
2461 | return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m"); | |
0c9ee5d5 YW |
2462 | r = sd_netlink_message_exit_container(message); |
2463 | if (r < 0) | |
0d411b7f | 2464 | return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m"); |
0c9ee5d5 YW |
2465 | } |
2466 | ||
4c78dc17 YW |
2467 | if (!manager->test_mode) { |
2468 | /* Do not update state files when running in test mode. */ | |
2469 | if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0) | |
2470 | return log_oom_debug(); | |
0d411b7f | 2471 | |
4c78dc17 YW |
2472 | if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0) |
2473 | return log_oom_debug(); | |
0d411b7f | 2474 | |
4c78dc17 YW |
2475 | if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0) |
2476 | return log_oom_debug(); | |
2477 | } | |
0d411b7f | 2478 | |
0c9ee5d5 YW |
2479 | link = new(Link, 1); |
2480 | if (!link) | |
2481 | return -ENOMEM; | |
2482 | ||
2483 | *link = (Link) { | |
2484 | .n_ref = 1, | |
2485 | .state = LINK_STATE_PENDING, | |
2486 | .online_state = _LINK_ONLINE_STATE_INVALID, | |
2487 | .ifindex = ifindex, | |
2488 | .iftype = iftype, | |
2489 | .ifname = TAKE_PTR(ifname), | |
2490 | .kind = TAKE_PTR(kind), | |
2491 | ||
0d411b7f YW |
2492 | .state_file = TAKE_PTR(state_file), |
2493 | .lease_file = TAKE_PTR(lease_file), | |
2494 | .lldp_file = TAKE_PTR(lldp_file), | |
2495 | ||
0c9ee5d5 YW |
2496 | .n_dns = UINT_MAX, |
2497 | .dns_default_route = -1, | |
2498 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
2499 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
2500 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
2501 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
2502 | }; | |
2503 | ||
6eab614d | 2504 | r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link); |
0c9ee5d5 | 2505 | if (r < 0) |
0d411b7f | 2506 | return log_link_debug_errno(link, r, "Failed to store link into manager: %m"); |
0c9ee5d5 YW |
2507 | |
2508 | link->manager = manager; | |
2509 | ||
0d411b7f | 2510 | r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
0c9ee5d5 | 2511 | if (r < 0) |
0d411b7f | 2512 | return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m"); |
0c9ee5d5 | 2513 | |
8a77e245 YW |
2514 | log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s", |
2515 | link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind)); | |
2516 | ||
4fea97a6 YW |
2517 | r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr); |
2518 | if (r < 0) { | |
2519 | if (r != -ENODATA) | |
2520 | log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute, ignoring: %m"); | |
2521 | ||
2522 | if (netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL) >= 0) { | |
2523 | /* Fallback to ethtool, if the link has a hardware address. */ | |
2524 | r = ethtool_get_permanent_hw_addr(&manager->ethtool_fd, link->ifname, &link->permanent_hw_addr); | |
2525 | if (r < 0) | |
2526 | log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m"); | |
2527 | } | |
2528 | } | |
8a77e245 YW |
2529 | if (link->permanent_hw_addr.length > 0) |
2530 | log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr)); | |
0c9ee5d5 YW |
2531 | |
2532 | r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver); | |
2533 | if (r < 0) | |
2534 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
df25b9e4 YW |
2535 | else |
2536 | log_link_debug(link, "Found driver: %s", strna(link->driver)); | |
0c9ee5d5 | 2537 | |
b1d9c504 YW |
2538 | if (streq_ptr(link->driver, "dsa")) { |
2539 | uint32_t dsa_master_ifindex; | |
2540 | ||
2541 | r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex); | |
2542 | if (r < 0) { | |
2543 | dsa_master_ifindex = 0; | |
2544 | if (r != -ENODATA) | |
2545 | log_link_warning_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface, ignoring: %m"); | |
2546 | } else if (dsa_master_ifindex > INT_MAX) { | |
2547 | dsa_master_ifindex = 0; | |
2548 | log_link_warning(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.", | |
2549 | dsa_master_ifindex); | |
2550 | } | |
2551 | ||
2552 | link->dsa_master_ifindex = (int) dsa_master_ifindex; | |
2553 | } | |
2554 | ||
0c9ee5d5 | 2555 | *ret = TAKE_PTR(link); |
0c9ee5d5 YW |
2556 | return 0; |
2557 | } | |
2558 | ||
0d411b7f | 2559 | int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) { |
3be9d62a YW |
2560 | Link *link = NULL; |
2561 | NetDev *netdev = NULL; | |
2562 | uint16_t type; | |
2563 | const char *name; | |
2564 | int r, ifindex; | |
2565 | ||
2566 | assert(rtnl); | |
2567 | assert(message); | |
0d411b7f | 2568 | assert(manager); |
3be9d62a YW |
2569 | |
2570 | if (sd_netlink_message_is_error(message)) { | |
2571 | r = sd_netlink_message_get_errno(message); | |
2572 | if (r < 0) | |
2573 | log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); | |
2574 | ||
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | r = sd_netlink_message_get_type(message, &type); | |
2579 | if (r < 0) { | |
2580 | log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); | |
2581 | return 0; | |
2582 | } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { | |
2583 | log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); | |
2584 | return 0; | |
2585 | } | |
2586 | ||
2587 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
2588 | if (r < 0) { | |
2589 | log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); | |
2590 | return 0; | |
2591 | } else if (ifindex <= 0) { | |
2592 | log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); | |
2593 | return 0; | |
2594 | } | |
2595 | ||
2596 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
2597 | if (r < 0) { | |
2598 | log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); | |
2599 | return 0; | |
2600 | } | |
2601 | ||
6eab614d | 2602 | (void) link_get_by_index(manager, ifindex, &link); |
0d411b7f | 2603 | (void) netdev_get(manager, name, &netdev); |
3be9d62a YW |
2604 | |
2605 | switch (type) { | |
2606 | case RTM_NEWLINK: | |
0d411b7f YW |
2607 | if (netdev) { |
2608 | /* netdev exists, so make sure the ifindex matches */ | |
2609 | r = netdev_set_ifindex(netdev, message); | |
2610 | if (r < 0) { | |
2611 | log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m"); | |
2612 | return 0; | |
2613 | } | |
2614 | } | |
2615 | ||
3be9d62a YW |
2616 | if (!link) { |
2617 | /* link is new, so add it */ | |
0d411b7f | 2618 | r = link_new(manager, message, &link); |
3be9d62a | 2619 | if (r < 0) { |
0d411b7f | 2620 | log_warning_errno(r, "Could not process new link message: %m"); |
3be9d62a YW |
2621 | return 0; |
2622 | } | |
3be9d62a | 2623 | |
0d411b7f | 2624 | r = link_update(link, message); |
3be9d62a | 2625 | if (r < 0) { |
0d411b7f YW |
2626 | log_warning_errno(r, "Could not process link message: %m"); |
2627 | link_enter_failed(link); | |
3be9d62a YW |
2628 | return 0; |
2629 | } | |
3be9d62a | 2630 | |
0d411b7f YW |
2631 | r = link_check_initialized(link); |
2632 | if (r < 0) { | |
2633 | log_warning_errno(r, "Failed to check link is initialized: %m"); | |
2634 | link_enter_failed(link); | |
2635 | return 0; | |
2636 | } | |
2637 | } else { | |
2638 | r = link_update(link, message); | |
2639 | if (r < 0) { | |
2640 | log_warning_errno(r, "Could not process link message: %m"); | |
2641 | link_enter_failed(link); | |
2642 | return 0; | |
2643 | } | |
3be9d62a YW |
2644 | } |
2645 | ||
2646 | break; | |
2647 | ||
2648 | case RTM_DELLINK: | |
2649 | link_drop(link); | |
2650 | netdev_drop(netdev); | |
2651 | ||
2652 | break; | |
2653 | ||
2654 | default: | |
04499a70 | 2655 | assert_not_reached(); |
3be9d62a YW |
2656 | } |
2657 | ||
2658 | return 1; | |
2659 | } | |
2660 | ||
79c6e114 YW |
2661 | int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
2662 | uint16_t message_type; | |
2663 | int r; | |
2664 | ||
2665 | assert(m); | |
2666 | assert(link); | |
2667 | assert(error_msg); | |
2668 | ||
2669 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2670 | return 0; | |
2671 | ||
2672 | r = sd_netlink_message_get_errno(m); | |
2673 | if (r < 0) { | |
2674 | log_link_message_warning_errno(link, m, r, error_msg); | |
2675 | link_enter_failed(link); | |
2676 | return 0; | |
2677 | } | |
2678 | ||
2679 | r = sd_netlink_message_get_type(m, &message_type); | |
2680 | if (r < 0) { | |
2681 | log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m"); | |
2682 | return 0; | |
2683 | } | |
2684 | if (message_type != RTM_NEWLINK) { | |
2685 | log_link_debug(link, "rtnl: received invalid link message type, ignoring."); | |
2686 | return 0; | |
2687 | } | |
2688 | ||
2689 | r = link_update(link, m); | |
2690 | if (r < 0) { | |
2691 | link_enter_failed(link); | |
2692 | return 0; | |
2693 | } | |
2694 | ||
2695 | return 1; | |
2696 | } | |
2697 | ||
2698 | int link_call_getlink(Link *link, link_netlink_message_handler_t callback) { | |
2699 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2700 | int r; | |
2701 | ||
2702 | assert(link); | |
2703 | assert(link->manager); | |
2704 | assert(link->manager->rtnl); | |
2705 | assert(callback); | |
2706 | ||
2707 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex); | |
2708 | if (r < 0) | |
2709 | return r; | |
2710 | ||
2711 | r = netlink_call_async(link->manager->rtnl, NULL, req, callback, | |
2712 | link_netlink_destroy_callback, link); | |
2713 | if (r < 0) | |
2714 | return r; | |
2715 | ||
2716 | link_ref(link); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
fe8db0c5 | 2720 | static const char* const link_state_table[_LINK_STATE_MAX] = { |
0580badc | 2721 | [LINK_STATE_PENDING] = "pending", |
bd08ce56 | 2722 | [LINK_STATE_INITIALIZED] = "initialized", |
289e6774 | 2723 | [LINK_STATE_CONFIGURING] = "configuring", |
0580badc ZJS |
2724 | [LINK_STATE_CONFIGURED] = "configured", |
2725 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
2726 | [LINK_STATE_FAILED] = "failed", | |
2727 | [LINK_STATE_LINGER] = "linger", | |
fe8db0c5 TG |
2728 | }; |
2729 | ||
2730 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
7ae55b78 YW |
2731 | |
2732 | int link_flags_to_string_alloc(uint32_t flags, char **ret) { | |
2733 | _cleanup_free_ char *str = NULL; | |
19aa7eeb ZJS |
2734 | static const char* map[] = { |
2735 | [LOG2U(IFF_UP)] = "up", /* interface is up. */ | |
2736 | [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid.*/ | |
2737 | [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */ | |
2738 | [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */ | |
2739 | [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */ | |
2740 | [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */ | |
2741 | [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */ | |
2742 | [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */ | |
2743 | [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */ | |
2744 | [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */ | |
2745 | [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */ | |
2746 | [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */ | |
2747 | [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast.*/ | |
2748 | [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */ | |
2749 | [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */ | |
2750 | [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */ | |
2751 | [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */ | |
2752 | [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */ | |
2753 | [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */ | |
7ae55b78 YW |
2754 | }; |
2755 | ||
2756 | assert(ret); | |
2757 | ||
2758 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
19aa7eeb ZJS |
2759 | if (FLAGS_SET(flags, 1 << i) && map[i]) |
2760 | if (!strextend_with_separator(&str, ",", map[i])) | |
2761 | return -ENOMEM; | |
7ae55b78 YW |
2762 | |
2763 | *ret = TAKE_PTR(str); | |
2764 | return 0; | |
2765 | } | |
2766 | ||
2767 | static const char * const kernel_operstate_table[] = { | |
2768 | [IF_OPER_UNKNOWN] = "unknown", | |
2769 | [IF_OPER_NOTPRESENT] = "not-present", | |
2770 | [IF_OPER_DOWN] = "down", | |
2771 | [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down", | |
2772 | [IF_OPER_TESTING] = "testing", | |
2773 | [IF_OPER_DORMANT] = "dormant", | |
2774 | [IF_OPER_UP] = "up", | |
2775 | }; | |
2776 | ||
2777 | DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int); |