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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" | |
bd91b83e | 20 | #include "dhcp-lease-internal.h" |
686d13b9 | 21 | #include "env-file.h" |
4bb7cc82 | 22 | #include "ethtool-util.h" |
6706ce2f | 23 | #include "event-util.h" |
3ffd4af2 | 24 | #include "fd-util.h" |
cf1d700d | 25 | #include "fileio.h" |
176b8be1 | 26 | #include "format-util.h" |
af664001 | 27 | #include "fs-util.h" |
e2341b6b | 28 | #include "glyph-util.h" |
3ae6b3bf | 29 | #include "logarithm.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" |
11cee6ef | 37 | #include "networkd-bridge-vlan.h" |
3ddcbeea | 38 | #include "networkd-can.h" |
d5ebcf65 | 39 | #include "networkd-dhcp-prefix-delegation.h" |
8fcf1d61 | 40 | #include "networkd-dhcp-server.h" |
ca5ad760 YW |
41 | #include "networkd-dhcp4.h" |
42 | #include "networkd-dhcp6.h" | |
76a86ffd | 43 | #include "networkd-ipv4acd.h" |
ca5ad760 | 44 | #include "networkd-ipv4ll.h" |
76c5a0f2 | 45 | #include "networkd-ipv6-proxy-ndp.h" |
6a1af3d4 YW |
46 | #include "networkd-link-bus.h" |
47 | #include "networkd-link.h" | |
8e1ad1ea | 48 | #include "networkd-lldp-tx.h" |
23f53b99 | 49 | #include "networkd-manager.h" |
1e7a0e21 | 50 | #include "networkd-ndisc.h" |
e4a71bf3 | 51 | #include "networkd-neighbor.h" |
75156ccb | 52 | #include "networkd-nexthop.h" |
19d9a5ad | 53 | #include "networkd-queue.h" |
7465dd22 | 54 | #include "networkd-radv.h" |
fc35a9f8 | 55 | #include "networkd-route-util.h" |
3b6a3bde | 56 | #include "networkd-route.h" |
bce67bbe | 57 | #include "networkd-routing-policy-rule.h" |
0fa8ee6c | 58 | #include "networkd-setlink.h" |
19d9a5ad | 59 | #include "networkd-sriov.h" |
3b5a4fc6 | 60 | #include "networkd-state-file.h" |
19d9a5ad | 61 | #include "networkd-sysctl.h" |
986b2514 | 62 | #include "networkd-wifi.h" |
cf1d700d TG |
63 | #include "set.h" |
64 | #include "socket-util.h" | |
15a5e950 | 65 | #include "stdio-util.h" |
8b43440b | 66 | #include "string-table.h" |
51517f9e | 67 | #include "strv.h" |
34658df2 | 68 | #include "tc.h" |
e4de7287 | 69 | #include "tmpfile-util.h" |
af7a86b8 | 70 | #include "tuntap.h" |
299ad32d | 71 | #include "udev-util.h" |
737f1405 | 72 | #include "vrf.h" |
fc2f9534 | 73 | |
5e0534f1 | 74 | bool link_ipv6_enabled(Link *link) { |
439689c6 SS |
75 | assert(link); |
76 | ||
77 | if (!socket_ipv6_is_supported()) | |
78 | return false; | |
79 | ||
5fb5fae9 | 80 | if (link->iftype == ARPHRD_CAN) |
2b00a4e0 TY |
81 | return false; |
82 | ||
5fb5fae9 YW |
83 | if (!link->network) |
84 | return false; | |
85 | ||
86 | if (link->network->bond) | |
af9ba57a YW |
87 | return false; |
88 | ||
bd7e0a3f | 89 | if (link_may_have_ipv6ll(link, /* check_multicast = */ false)) |
adfeee49 YW |
90 | return true; |
91 | ||
92 | if (network_has_static_ipv6_configurations(link->network)) | |
93 | return true; | |
94 | ||
95 | return false; | |
439689c6 SS |
96 | } |
97 | ||
fc35a9f8 YW |
98 | bool link_has_ipv6_connectivity(Link *link) { |
99 | LinkAddressState ipv6_address_state; | |
100 | ||
101 | assert(link); | |
102 | ||
103 | link_get_address_states(link, NULL, &ipv6_address_state, NULL); | |
104 | ||
105 | switch (ipv6_address_state) { | |
106 | case LINK_ADDRESS_STATE_ROUTABLE: | |
107 | /* If the interface has a routable IPv6 address, then we assume yes. */ | |
108 | return true; | |
109 | ||
110 | case LINK_ADDRESS_STATE_DEGRADED: | |
111 | /* If the interface has only degraded IPv6 address (mostly, link-local address), then let's check | |
112 | * there is an IPv6 default gateway. */ | |
113 | return link_has_default_gateway(link, AF_INET6); | |
114 | ||
115 | case LINK_ADDRESS_STATE_OFF: | |
116 | /* No IPv6 address. */ | |
117 | return false; | |
118 | ||
119 | default: | |
120 | assert_not_reached(); | |
121 | } | |
122 | } | |
123 | ||
e33232d4 | 124 | static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) { |
7191a57a YW |
125 | assert(link); |
126 | ||
d8d4db58 YW |
127 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) |
128 | return false; | |
129 | ||
2fd3908b YW |
130 | if (!link->network) |
131 | return allow_unmanaged; | |
7191a57a | 132 | |
baa95d22 YW |
133 | if (!link->network->configure_without_carrier) { |
134 | if (link->set_flags_messages > 0) | |
135 | return false; | |
136 | ||
137 | if (!link_has_carrier(link)) | |
138 | return false; | |
139 | } | |
7191a57a | 140 | |
0fa8ee6c YW |
141 | if (link->set_link_messages > 0) |
142 | return false; | |
143 | ||
112a0972 YW |
144 | if (!link->activated) |
145 | return false; | |
112a0972 | 146 | |
7191a57a YW |
147 | return true; |
148 | } | |
149 | ||
e33232d4 YW |
150 | bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
151 | return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one); | |
152 | } | |
153 | ||
15761549 YW |
154 | void link_ntp_settings_clear(Link *link) { |
155 | link->ntp = strv_free(link->ntp); | |
156 | } | |
157 | ||
158 | void link_dns_settings_clear(Link *link) { | |
f5fbe71d | 159 | if (link->n_dns != UINT_MAX) |
e77bd3fd YW |
160 | for (unsigned i = 0; i < link->n_dns; i++) |
161 | in_addr_full_free(link->dns[i]); | |
15761549 | 162 | link->dns = mfree(link->dns); |
f5fbe71d | 163 | link->n_dns = UINT_MAX; |
15761549 | 164 | |
6e4571f0 YW |
165 | link->search_domains = ordered_set_free(link->search_domains); |
166 | link->route_domains = ordered_set_free(link->route_domains); | |
15761549 YW |
167 | |
168 | link->dns_default_route = -1; | |
169 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
170 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
171 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
172 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
173 | ||
174 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
175 | } | |
176 | ||
1a6bb31f YW |
177 | static void link_free_engines(Link *link) { |
178 | if (!link) | |
179 | return; | |
180 | ||
181 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
b3fac19f | 182 | |
1a6bb31f YW |
183 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); |
184 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
e49bad01 | 185 | link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name); |
1a6bb31f | 186 | |
35778343 | 187 | link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); |
c01b9b87 | 188 | link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx); |
1a6bb31f | 189 | |
5385e5f9 YW |
190 | link->ipv4acd_by_address = hashmap_free(link->ipv4acd_by_address); |
191 | ||
1a6bb31f | 192 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); |
b3fac19f | 193 | |
1a6bb31f | 194 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); |
1633c457 | 195 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
b3fac19f | 196 | |
1a6bb31f | 197 | link->ndisc = sd_ndisc_unref(link->ndisc); |
b3fac19f YW |
198 | link->ndisc_expire = sd_event_source_disable_unref(link->ndisc_expire); |
199 | ndisc_flush(link); | |
200 | ||
1a6bb31f YW |
201 | link->radv = sd_radv_unref(link->radv); |
202 | } | |
203 | ||
8301aa0b | 204 | static Link *link_free(Link *link) { |
8301aa0b | 205 | assert(link); |
f579559b | 206 | |
15761549 YW |
207 | link_ntp_settings_clear(link); |
208 | link_dns_settings_clear(link); | |
209 | ||
8eec0b9d | 210 | link->routes = set_free(link->routes); |
8eec0b9d | 211 | link->neighbors = set_free(link->neighbors); |
8eec0b9d | 212 | link->addresses = set_free(link->addresses); |
3a67b8bb YW |
213 | link->qdiscs = set_free(link->qdiscs); |
214 | link->tclasses = set_free(link->tclasses); | |
adda1ed9 | 215 | |
a27588d4 | 216 | link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes); |
4b409e85 | 217 | |
1a6bb31f | 218 | link_free_engines(link); |
49699bac | 219 | |
b0ff6dea | 220 | set_free(link->sr_iov_virt_port_ifindices); |
c166a070 | 221 | free(link->ifname); |
572b21d9 | 222 | strv_free(link->alternative_names); |
ceac4078 | 223 | free(link->kind); |
8d968fdd | 224 | free(link->ssid); |
6706ce2f | 225 | free(link->previous_ssid); |
c643bda5 | 226 | free(link->driver); |
6cad256d | 227 | |
a34e58d4 YW |
228 | unlink_and_free(link->lease_file); |
229 | unlink_and_free(link->lldp_file); | |
230 | unlink_and_free(link->state_file); | |
c166a070 | 231 | |
8de56fb3 | 232 | sd_device_unref(link->dev); |
9aa2585e | 233 | netdev_unref(link->netdev); |
b5db00e5 | 234 | |
0d4ad91d | 235 | hashmap_free(link->bound_to_links); |
0d4ad91d AR |
236 | hashmap_free(link->bound_by_links); |
237 | ||
5f707e12 | 238 | set_free_with_destructor(link->slaves, link_unref); |
033295c1 | 239 | |
c9c908a6 YW |
240 | network_unref(link->network); |
241 | ||
6706ce2f YW |
242 | sd_event_source_disable_unref(link->carrier_lost_timer); |
243 | ||
8301aa0b | 244 | return mfree(link); |
14b746f7 TG |
245 | } |
246 | ||
8301aa0b | 247 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
14b746f7 | 248 | |
6eab614d | 249 | int link_get_by_index(Manager *m, int ifindex, Link **ret) { |
11a7f229 | 250 | Link *link; |
11a7f229 TG |
251 | |
252 | assert(m); | |
c2aed128 YW |
253 | |
254 | if (ifindex <= 0) | |
255 | return -EINVAL; | |
11a7f229 | 256 | |
6eab614d | 257 | link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex)); |
11a7f229 TG |
258 | if (!link) |
259 | return -ENODEV; | |
260 | ||
0b54c870 YW |
261 | if (ret) |
262 | *ret = link; | |
263 | return 0; | |
264 | } | |
265 | ||
266 | int link_get_by_name(Manager *m, const char *ifname, Link **ret) { | |
267 | Link *link; | |
268 | ||
269 | assert(m); | |
270 | assert(ifname); | |
11a7f229 | 271 | |
0b54c870 YW |
272 | link = hashmap_get(m->links_by_name, ifname); |
273 | if (!link) | |
274 | return -ENODEV; | |
275 | ||
276 | if (ret) | |
277 | *ret = link; | |
11a7f229 TG |
278 | return 0; |
279 | } | |
280 | ||
fe321d45 YW |
281 | int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) { |
282 | Link *link; | |
283 | ||
284 | assert(m); | |
285 | assert(hw_addr); | |
286 | ||
287 | link = hashmap_get(m->links_by_hw_addr, hw_addr); | |
288 | if (!link) | |
289 | return -ENODEV; | |
290 | ||
291 | if (ret) | |
292 | *ret = link; | |
293 | return 0; | |
294 | } | |
295 | ||
81357285 YW |
296 | int link_get_master(Link *link, Link **ret) { |
297 | assert(link); | |
298 | assert(link->manager); | |
299 | assert(ret); | |
300 | ||
301 | if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex) | |
302 | return -ENODEV; | |
303 | ||
6eab614d | 304 | return link_get_by_index(link->manager, link->master_ifindex, ret); |
81357285 YW |
305 | } |
306 | ||
af9ba57a | 307 | void link_set_state(Link *link, LinkState state) { |
e331e246 TG |
308 | assert(link); |
309 | ||
310 | if (link->state == state) | |
311 | return; | |
312 | ||
0beb9542 YW |
313 | log_link_debug(link, "State changed: %s -> %s", |
314 | link_state_to_string(link->state), | |
315 | link_state_to_string(state)); | |
316 | ||
e331e246 TG |
317 | link->state = state; |
318 | ||
319 | link_send_changed(link, "AdministrativeState", NULL); | |
9092113d | 320 | link_dirty(link); |
e331e246 TG |
321 | } |
322 | ||
2a99eed0 | 323 | int link_stop_engines(Link *link, bool may_keep_dhcp) { |
372acaad | 324 | int r, ret = 0; |
111bb8f9 TG |
325 | |
326 | assert(link); | |
327 | assert(link->manager); | |
328 | assert(link->manager->event); | |
329 | ||
80060352 ZJS |
330 | bool keep_dhcp = may_keep_dhcp && |
331 | link->network && | |
76a86ffd | 332 | !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */ |
80060352 ZJS |
333 | (link->manager->restarting || |
334 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
335 | ||
84add3cd | 336 | if (!keep_dhcp) { |
372acaad YW |
337 | r = sd_dhcp_client_stop(link->dhcp_client); |
338 | if (r < 0) | |
339 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 client: %m")); | |
111bb8f9 TG |
340 | } |
341 | ||
372acaad YW |
342 | r = sd_dhcp_server_stop(link->dhcp_server); |
343 | if (r < 0) | |
344 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv4 server: %m")); | |
2a99eed0 | 345 | |
372acaad YW |
346 | r = sd_lldp_rx_stop(link->lldp_rx); |
347 | if (r < 0) | |
348 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Rx: %m")); | |
c01b9b87 | 349 | |
372acaad YW |
350 | r = sd_lldp_tx_stop(link->lldp_tx); |
351 | if (r < 0) | |
352 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop LLDP Tx: %m")); | |
9cc65242 | 353 | |
372acaad YW |
354 | r = sd_ipv4ll_stop(link->ipv4ll); |
355 | if (r < 0) | |
356 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 link-local: %m")); | |
dd43110f | 357 | |
372acaad YW |
358 | r = ipv4acd_stop(link); |
359 | if (r < 0) | |
360 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv4 ACD client: %m")); | |
051e77ca | 361 | |
372acaad YW |
362 | r = sd_dhcp6_client_stop(link->dhcp6_client); |
363 | if (r < 0) | |
364 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m")); | |
4138fb2c | 365 | |
372acaad YW |
366 | r = dhcp_pd_remove(link, /* only_marked = */ false); |
367 | if (r < 0) | |
368 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not remove DHCPv6 PD addresses and routes: %m")); | |
1633c457 | 369 | |
372acaad YW |
370 | r = ndisc_stop(link); |
371 | if (r < 0) | |
372 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Discovery: %m")); | |
4138fb2c | 373 | |
259c65f3 YW |
374 | ndisc_flush(link); |
375 | ||
372acaad YW |
376 | r = sd_radv_stop(link->radv); |
377 | if (r < 0) | |
378 | RET_GATHER(ret, log_link_warning_errno(link, r, "Could not stop IPv6 Router Advertisement: %m")); | |
7465dd22 | 379 | |
372acaad | 380 | return ret; |
111bb8f9 TG |
381 | } |
382 | ||
b22d8a00 | 383 | void link_enter_failed(Link *link) { |
c2eb7753 YW |
384 | int r; |
385 | ||
ef1ba606 | 386 | assert(link); |
f882c247 | 387 | |
370e9930 | 388 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
389 | return; |
390 | ||
6a7a4e4d | 391 | log_link_warning(link, "Failed"); |
449f7554 | 392 | |
e331e246 | 393 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 394 | |
c2eb7753 YW |
395 | if (!ratelimit_below(&link->automatic_reconfigure_ratelimit)) { |
396 | log_link_warning(link, "The interface entered the failed state frequently, refusing to reconfigure it automatically."); | |
397 | goto stop; | |
398 | } | |
399 | ||
400 | log_link_info(link, "Trying to reconfigure the interface."); | |
401 | r = link_reconfigure(link, /* force = */ true); | |
402 | if (r < 0) { | |
403 | log_link_warning_errno(link, r, "Failed to reconfigure interface: %m"); | |
404 | goto stop; | |
405 | } | |
406 | ||
407 | return; | |
408 | ||
409 | stop: | |
410 | (void) link_stop_engines(link, /* may_keep_dhcp = */ false); | |
f882c247 TG |
411 | } |
412 | ||
6accfd31 DA |
413 | void link_check_ready(Link *link) { |
414 | Address *a; | |
6accfd31 DA |
415 | |
416 | assert(link); | |
417 | ||
5f58af25 YW |
418 | if (link->state == LINK_STATE_CONFIGURED) |
419 | return; | |
420 | ||
d19b9939 YW |
421 | if (link->state != LINK_STATE_CONFIGURING) |
422 | return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
6accfd31 DA |
423 | |
424 | if (!link->network) | |
a7f07cbe | 425 | return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__); |
6accfd31 | 426 | |
7558f9e7 YW |
427 | if (!link->tc_configured) |
428 | return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
600b7898 | 429 | |
a7f07cbe YW |
430 | if (link->set_link_messages > 0) |
431 | return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__); | |
432 | ||
433 | if (!link->activated) | |
434 | return (void) log_link_debug(link, "%s(): link is not activated.", __func__); | |
435 | ||
24b9c341 | 436 | if (link->iftype == ARPHRD_CAN) |
7558f9e7 | 437 | /* let's shortcut things for CAN which doesn't need most of checks below. */ |
24b9c341 | 438 | goto ready; |
7558f9e7 | 439 | |
879377ca YW |
440 | if (!link->stacked_netdevs_created) |
441 | return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__); | |
442 | ||
76c5a0f2 | 443 | if (!link->static_addresses_configured) |
d19b9939 | 444 | return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
6accfd31 | 445 | |
354bc760 YW |
446 | if (!link->static_address_labels_configured) |
447 | return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__); | |
448 | ||
e5b35bf6 YW |
449 | if (!link->static_bridge_fdb_configured) |
450 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
451 | ||
ff9e0783 YW |
452 | if (!link->static_bridge_mdb_configured) |
453 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
454 | ||
fdeba3f5 YW |
455 | if (!link->static_ipv6_proxy_ndp_configured) |
456 | return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__); | |
457 | ||
40ca350e YW |
458 | if (!link->static_neighbors_configured) |
459 | return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
460 | ||
d19b9939 YW |
461 | if (!link->static_nexthops_configured) |
462 | return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
c16c7808 | 463 | |
76c5a0f2 YW |
464 | if (!link->static_routes_configured) |
465 | return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
466 | ||
0e5ef6be | 467 | if (!link->static_routing_policy_rules_configured) |
d19b9939 | 468 | return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
6accfd31 | 469 | |
d19b9939 YW |
470 | if (!link->sr_iov_configured) |
471 | return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
518cd6b5 | 472 | |
4bcb8625 YW |
473 | /* IPv6LL is assigned after the link gains its carrier. */ |
474 | if (!link->network->configure_without_carrier && | |
475 | link_ipv6ll_enabled(link) && | |
476 | !in6_addr_is_set(&link->ipv6ll_address)) | |
477 | return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); | |
478 | ||
9e7d91ed YW |
479 | /* All static addresses must be ready. */ |
480 | bool has_static_address = false; | |
481 | SET_FOREACH(a, link->addresses) { | |
482 | if (a->source != NETWORK_CONFIG_SOURCE_STATIC) | |
483 | continue; | |
484 | if (!address_is_ready(a)) | |
485 | return (void) log_link_debug(link, "%s(): static address %s is not ready.", __func__, | |
486 | IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen)); | |
487 | has_static_address = true; | |
488 | } | |
489 | ||
490 | /* If at least one static address is requested, do not request that dynamic addressing protocols are finished. */ | |
491 | if (has_static_address) | |
492 | goto ready; | |
493 | ||
5f950e56 YW |
494 | /* If no dynamic addressing protocol enabled, assume the interface is ready. |
495 | * Note, ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */ | |
496 | if (!link_ipv4ll_enabled(link) && !link_dhcp4_enabled(link) && | |
497 | !link_dhcp6_enabled(link) && !link_dhcp_pd_is_enabled(link) && | |
498 | (link->network->configure_without_carrier || !link_ipv6_accept_ra_enabled(link))) | |
499 | goto ready; | |
500 | ||
501 | bool ipv4ll_ready = | |
502 | link_ipv4ll_enabled(link) && link->ipv4ll_address_configured && | |
503 | link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_IPV4LL); | |
504 | bool dhcp4_ready = | |
505 | link_dhcp4_enabled(link) && link->dhcp4_configured && | |
506 | link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP4); | |
507 | bool dhcp6_ready = | |
508 | link_dhcp6_enabled(link) && link->dhcp6_configured && | |
509 | (!link->network->dhcp6_use_address || | |
510 | link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP6)); | |
511 | bool dhcp_pd_ready = | |
512 | link_dhcp_pd_is_enabled(link) && link->dhcp_pd_configured && | |
513 | (!link->network->dhcp_pd_assign || | |
514 | link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_DHCP_PD)); | |
515 | bool ndisc_ready = | |
516 | link_ipv6_accept_ra_enabled(link) && link->ndisc_configured && | |
517 | (!link->network->ipv6_accept_ra_use_autonomous_prefix || | |
518 | link_check_addresses_ready(link, NETWORK_CONFIG_SOURCE_NDISC)); | |
519 | ||
195b83ed YW |
520 | /* If the uplink for PD is self, then request the corresponding DHCP protocol is also ready. */ |
521 | if (dhcp_pd_is_uplink(link, link, /* accept_auto = */ false)) { | |
522 | if (link_dhcp4_enabled(link) && link->network->dhcp_use_6rd && | |
0ad8d953 | 523 | sd_dhcp_lease_has_6rd(link->dhcp_lease)) { |
195b83ed YW |
524 | if (!dhcp4_ready) |
525 | return (void) log_link_debug(link, "%s(): DHCPv4 6rd prefix is assigned, but DHCPv4 protocol is not finished yet.", __func__); | |
526 | if (!dhcp_pd_ready) | |
527 | return (void) log_link_debug(link, "%s(): DHCPv4 is finished, but prefix acquired by DHCPv4-6rd is not assigned yet.", __func__); | |
528 | } | |
529 | ||
530 | if (link_dhcp6_enabled(link) && link->network->dhcp6_use_pd_prefix && | |
fb70992d | 531 | sd_dhcp6_lease_has_pd_prefix(link->dhcp6_lease)) { |
195b83ed YW |
532 | if (!dhcp6_ready) |
533 | return (void) log_link_debug(link, "%s(): DHCPv6 IA_PD prefix is assigned, but DHCPv6 protocol is not finished yet.", __func__); | |
534 | if (!dhcp_pd_ready) | |
535 | return (void) log_link_debug(link, "%s(): DHCPv6 is finished, but prefix acquired by DHCPv6 IA_PD is not assigned yet.", __func__); | |
536 | } | |
537 | } | |
538 | ||
5f950e56 YW |
539 | /* At least one dynamic addressing protocol is finished. */ |
540 | if (!ipv4ll_ready && !dhcp4_ready && !dhcp6_ready && !dhcp_pd_ready && !ndisc_ready) | |
541 | return (void) log_link_debug(link, "%s(): dynamic addressing protocols are enabled but none of them finished yet.", __func__); | |
542 | ||
543 | log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s", | |
544 | __func__, | |
545 | yes_no(ipv4ll_ready), | |
546 | yes_no(dhcp4_ready), | |
547 | yes_no(dhcp6_ready), | |
548 | yes_no(dhcp_pd_ready), | |
549 | yes_no(ndisc_ready)); | |
550 | ||
551 | ready: | |
29836c16 | 552 | link_set_state(link, LINK_STATE_CONFIGURED); |
6accfd31 DA |
553 | } |
554 | ||
97108953 | 555 | static int link_request_static_configs(Link *link) { |
f882c247 TG |
556 | int r; |
557 | ||
558 | assert(link); | |
559 | assert(link->network); | |
f5be5601 | 560 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 561 | |
354bc760 | 562 | r = link_request_static_addresses(link); |
0e5ef6be YW |
563 | if (r < 0) |
564 | return r; | |
565 | ||
354bc760 | 566 | r = link_request_static_address_labels(link); |
f3ef324d YW |
567 | if (r < 0) |
568 | return r; | |
e4a71bf3 | 569 | |
e5b35bf6 YW |
570 | r = link_request_static_bridge_fdb(link); |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
9a038aac YW |
574 | r = link_request_static_bridge_mdb(link); |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
fdeba3f5 YW |
578 | r = link_request_static_ipv6_proxy_ndp_addresses(link); |
579 | if (r < 0) | |
580 | return r; | |
581 | ||
40ca350e | 582 | r = link_request_static_neighbors(link); |
682c65b0 YW |
583 | if (r < 0) |
584 | return r; | |
bd6379ec | 585 | |
76c5a0f2 | 586 | r = link_request_static_nexthops(link, false); |
fe2bc17c YW |
587 | if (r < 0) |
588 | return r; | |
f882c247 | 589 | |
76c5a0f2 YW |
590 | r = link_request_static_routes(link, false); |
591 | if (r < 0) | |
592 | return r; | |
593 | ||
594 | r = link_request_static_routing_policy_rules(link); | |
5ae0fb7f YW |
595 | if (r < 0) |
596 | return r; | |
d4cdbea5 | 597 | |
f882c247 TG |
598 | return 0; |
599 | } | |
600 | ||
1187fc33 YW |
601 | static int link_request_stacked_netdevs(Link *link) { |
602 | NetDev *netdev; | |
e16e4b3b DS |
603 | int r; |
604 | ||
605 | assert(link); | |
606 | ||
1187fc33 | 607 | link->stacked_netdevs_created = false; |
e16e4b3b | 608 | |
1187fc33 | 609 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
b14686ff | 610 | r = link_request_stacked_netdev(link, netdev); |
1187fc33 YW |
611 | if (r < 0) |
612 | return r; | |
613 | } | |
e16e4b3b | 614 | |
bb916f35 | 615 | if (link->create_stacked_netdev_messages == 0) { |
1187fc33 | 616 | link->stacked_netdevs_created = true; |
bb916f35 YW |
617 | link_check_ready(link); |
618 | } | |
e16e4b3b DS |
619 | |
620 | return 0; | |
621 | } | |
622 | ||
8566df79 | 623 | static int link_acquire_dynamic_ipv6_conf(Link *link) { |
e7ab854c TG |
624 | int r; |
625 | ||
626 | assert(link); | |
627 | ||
0f96a823 YW |
628 | r = radv_start(link); |
629 | if (r < 0) | |
630 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m"); | |
7465dd22 | 631 | |
294f129b YW |
632 | r = ndisc_start(link); |
633 | if (r < 0) | |
634 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
cd305af1 | 635 | |
294f129b YW |
636 | r = dhcp6_start(link); |
637 | if (r < 0) | |
638 | return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); | |
cd305af1 | 639 | |
e7ab854c TG |
640 | return 0; |
641 | } | |
642 | ||
8566df79 | 643 | static int link_acquire_dynamic_ipv4_conf(Link *link) { |
ff254138 TG |
644 | int r; |
645 | ||
646 | assert(link); | |
ff254138 TG |
647 | assert(link->manager); |
648 | assert(link->manager->event); | |
649 | ||
0107b769 | 650 | if (link->dhcp_client) { |
294f129b | 651 | r = dhcp4_start(link); |
0107b769 | 652 | if (r < 0) |
294f129b | 653 | return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
0107b769 | 654 | |
ccffa166 | 655 | log_link_debug(link, "Acquiring DHCPv4 lease."); |
5c1d3fc9 | 656 | |
ccffa166 | 657 | } else if (link->ipv4ll) { |
59c27231 AK |
658 | if (in4_addr_is_set(&link->network->ipv4ll_start_address)) { |
659 | r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address); | |
660 | if (r < 0) | |
661 | return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m"); | |
662 | } | |
663 | ||
5c1d3fc9 | 664 | r = sd_ipv4ll_start(link->ipv4ll); |
6a7a4e4d LP |
665 | if (r < 0) |
666 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
ccffa166 YW |
667 | |
668 | log_link_debug(link, "Acquiring IPv4 link-local address."); | |
5c1d3fc9 UTL |
669 | } |
670 | ||
ab486ef4 YW |
671 | if (link->dhcp_server) { |
672 | r = sd_dhcp_server_start(link->dhcp_server); | |
673 | if (r < 0) | |
674 | return log_link_warning_errno(link, r, "Could not start DHCP server: %m"); | |
675 | } | |
676 | ||
76a86ffd YW |
677 | r = ipv4acd_start(link); |
678 | if (r < 0) | |
679 | return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m"); | |
680 | ||
6fc25497 SS |
681 | return 0; |
682 | } | |
683 | ||
8566df79 | 684 | static int link_acquire_dynamic_conf(Link *link) { |
6fc25497 SS |
685 | int r; |
686 | ||
687 | assert(link); | |
0f96a823 | 688 | assert(link->network); |
6fc25497 | 689 | |
8566df79 | 690 | r = link_acquire_dynamic_ipv4_conf(link); |
6fc25497 SS |
691 | if (r < 0) |
692 | return r; | |
693 | ||
94876904 | 694 | if (in6_addr_is_set(&link->ipv6ll_address)) { |
8566df79 | 695 | r = link_acquire_dynamic_ipv6_conf(link); |
6fc25497 SS |
696 | if (r < 0) |
697 | return r; | |
698 | } | |
699 | ||
a27588d4 | 700 | if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) { |
0f96a823 YW |
701 | /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be |
702 | * configured, and RADV may not be configured yet here. Only acquire subnet prefix when | |
703 | * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the | |
704 | * below will be called in radv_start(). */ | |
a27588d4 | 705 | r = dhcp_request_prefix_delegation(link); |
0f96a823 | 706 | if (r < 0) |
a27588d4 | 707 | return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m"); |
0f96a823 YW |
708 | } |
709 | ||
c01b9b87 YW |
710 | if (link->lldp_tx) { |
711 | r = sd_lldp_tx_start(link->lldp_tx); | |
712 | if (r < 0) | |
713 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
714 | } | |
8e1ad1ea | 715 | |
35778343 YW |
716 | if (link->lldp_rx) { |
717 | r = sd_lldp_rx_start(link->lldp_rx); | |
f8549910 YW |
718 | if (r < 0) |
719 | return log_link_warning_errno(link, r, "Failed to start LLDP client: %m"); | |
720 | } | |
721 | ||
ff254138 TG |
722 | return 0; |
723 | } | |
724 | ||
7657ec3e | 725 | int link_ipv6ll_gained(Link *link) { |
0c9ee5d5 | 726 | int r; |
deb2e523 | 727 | |
0c9ee5d5 | 728 | assert(link); |
deb2e523 | 729 | |
0c9ee5d5 | 730 | log_link_info(link, "Gained IPv6LL"); |
deb2e523 | 731 | |
7657ec3e YW |
732 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
733 | return 0; | |
0c9ee5d5 | 734 | |
7657ec3e YW |
735 | r = link_acquire_dynamic_ipv6_conf(link); |
736 | if (r < 0) | |
737 | return r; | |
0c9ee5d5 | 738 | |
7657ec3e | 739 | link_check_ready(link); |
0c9ee5d5 | 740 | return 0; |
deb2e523 TG |
741 | } |
742 | ||
112a0972 | 743 | int link_handle_bound_to_list(Link *link) { |
0d4ad91d AR |
744 | bool required_up = false; |
745 | bool link_is_up = false; | |
852a3916 | 746 | Link *l; |
0d4ad91d AR |
747 | |
748 | assert(link); | |
749 | ||
ad82f0c3 YW |
750 | /* If at least one interface in bound_to_links has carrier, then make this interface up. |
751 | * If all interfaces in bound_to_links do not, then make this interface down. */ | |
752 | ||
0d4ad91d AR |
753 | if (hashmap_isempty(link->bound_to_links)) |
754 | return 0; | |
755 | ||
756 | if (link->flags & IFF_UP) | |
757 | link_is_up = true; | |
758 | ||
852a3916 | 759 | HASHMAP_FOREACH(l, link->bound_to_links) |
0d4ad91d AR |
760 | if (link_has_carrier(l)) { |
761 | required_up = true; | |
762 | break; | |
763 | } | |
764 | ||
852a3916 | 765 | if (!required_up && link_is_up) |
68f52063 | 766 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
852a3916 | 767 | if (required_up && !link_is_up) |
68f52063 | 768 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0d4ad91d AR |
769 | |
770 | return 0; | |
771 | } | |
772 | ||
773 | static int link_handle_bound_by_list(Link *link) { | |
0d4ad91d AR |
774 | Link *l; |
775 | int r; | |
776 | ||
777 | assert(link); | |
778 | ||
ad82f0c3 YW |
779 | /* Update up or down state of interfaces which depend on this interface's carrier state. */ |
780 | ||
0d4ad91d AR |
781 | if (hashmap_isempty(link->bound_by_links)) |
782 | return 0; | |
783 | ||
852a3916 | 784 | HASHMAP_FOREACH(l, link->bound_by_links) { |
0d4ad91d AR |
785 | r = link_handle_bound_to_list(l); |
786 | if (r < 0) | |
787 | return r; | |
788 | } | |
789 | ||
790 | return 0; | |
791 | } | |
792 | ||
793 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
794 | int r; | |
795 | ||
796 | assert(link); | |
797 | assert(carrier); | |
798 | ||
799 | if (link == carrier) | |
800 | return 0; | |
801 | ||
802 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
803 | return 0; | |
804 | ||
190b3b5c | 805 | r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
0d4ad91d AR |
806 | if (r < 0) |
807 | return r; | |
808 | ||
9092113d YW |
809 | link_dirty(link); |
810 | ||
0d4ad91d AR |
811 | return 0; |
812 | } | |
813 | ||
814 | static int link_new_bound_by_list(Link *link) { | |
815 | Manager *m; | |
816 | Link *carrier; | |
0d4ad91d | 817 | int r; |
0d4ad91d AR |
818 | |
819 | assert(link); | |
820 | assert(link->manager); | |
821 | ||
822 | m = link->manager; | |
823 | ||
6eab614d | 824 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
0d4ad91d AR |
825 | if (!carrier->network) |
826 | continue; | |
827 | ||
828 | if (strv_isempty(carrier->network->bind_carrier)) | |
829 | continue; | |
830 | ||
191a3f16 | 831 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
0d4ad91d AR |
832 | r = link_put_carrier(link, carrier, &link->bound_by_links); |
833 | if (r < 0) | |
834 | return r; | |
0d4ad91d AR |
835 | } |
836 | } | |
837 | ||
90e74a66 | 838 | HASHMAP_FOREACH(carrier, link->bound_by_links) { |
0d4ad91d AR |
839 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
840 | if (r < 0) | |
841 | return r; | |
0d4ad91d AR |
842 | } |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
847 | static int link_new_bound_to_list(Link *link) { | |
848 | Manager *m; | |
849 | Link *carrier; | |
0d4ad91d | 850 | int r; |
0d4ad91d AR |
851 | |
852 | assert(link); | |
853 | assert(link->manager); | |
854 | ||
855 | if (!link->network) | |
856 | return 0; | |
857 | ||
858 | if (strv_isempty(link->network->bind_carrier)) | |
859 | return 0; | |
860 | ||
861 | m = link->manager; | |
862 | ||
6eab614d | 863 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
191a3f16 | 864 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
0d4ad91d AR |
865 | r = link_put_carrier(link, carrier, &link->bound_to_links); |
866 | if (r < 0) | |
867 | return r; | |
0d4ad91d AR |
868 | } |
869 | } | |
870 | ||
852a3916 | 871 | HASHMAP_FOREACH(carrier, link->bound_to_links) { |
0d4ad91d AR |
872 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
873 | if (r < 0) | |
874 | return r; | |
0d4ad91d AR |
875 | } |
876 | ||
877 | return 0; | |
878 | } | |
879 | ||
0d4ad91d | 880 | static void link_free_bound_to_list(Link *link) { |
9092113d | 881 | bool updated = false; |
0d4ad91d | 882 | Link *bound_to; |
0d4ad91d | 883 | |
9092113d YW |
884 | assert(link); |
885 | ||
886 | while ((bound_to = hashmap_steal_first(link->bound_to_links))) { | |
887 | updated = true; | |
0d4ad91d AR |
888 | |
889 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
84de38c5 | 890 | link_dirty(bound_to); |
0d4ad91d AR |
891 | } |
892 | ||
9092113d YW |
893 | if (updated) |
894 | link_dirty(link); | |
0d4ad91d AR |
895 | } |
896 | ||
897 | static void link_free_bound_by_list(Link *link) { | |
9092113d | 898 | bool updated = false; |
0d4ad91d | 899 | Link *bound_by; |
0d4ad91d | 900 | |
9092113d YW |
901 | assert(link); |
902 | ||
903 | while ((bound_by = hashmap_steal_first(link->bound_by_links))) { | |
904 | updated = true; | |
0d4ad91d AR |
905 | |
906 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
84de38c5 | 907 | link_dirty(bound_by); |
0d4ad91d AR |
908 | link_handle_bound_to_list(bound_by); |
909 | } | |
910 | } | |
911 | ||
9092113d YW |
912 | if (updated) |
913 | link_dirty(link); | |
0d4ad91d AR |
914 | } |
915 | ||
81357285 | 916 | static int link_append_to_master(Link *link) { |
5f707e12 YW |
917 | Link *master; |
918 | int r; | |
919 | ||
920 | assert(link); | |
5f707e12 | 921 | |
81357285 YW |
922 | /* - The link may have no master. |
923 | * - RTM_NEWLINK message about master interface may not be received yet. */ | |
924 | if (link_get_master(link, &master) < 0) | |
925 | return 0; | |
5f707e12 | 926 | |
de7fef4b | 927 | r = set_ensure_put(&master->slaves, NULL, link); |
38288f0b | 928 | if (r <= 0) |
5f707e12 YW |
929 | return r; |
930 | ||
931 | link_ref(link); | |
932 | return 0; | |
933 | } | |
934 | ||
81357285 | 935 | static void link_drop_from_master(Link *link) { |
5f707e12 YW |
936 | Link *master; |
937 | ||
938 | assert(link); | |
939 | ||
81357285 | 940 | if (!link->manager) |
5f707e12 YW |
941 | return; |
942 | ||
81357285 | 943 | if (link_get_master(link, &master) < 0) |
5f707e12 YW |
944 | return; |
945 | ||
946 | link_unref(set_remove(master->slaves, link)); | |
947 | } | |
948 | ||
4303e980 | 949 | static int link_drop_requests(Link *link) { |
56001f02 | 950 | Request *req; |
4303e980 | 951 | int ret = 0; |
56001f02 YW |
952 | |
953 | assert(link); | |
954 | assert(link->manager); | |
955 | ||
4303e980 YW |
956 | ORDERED_SET_FOREACH(req, link->manager->request_queue) { |
957 | if (req->link != link) | |
958 | continue; | |
959 | ||
960 | /* If the request is already called, but its reply is not received, then we need to | |
961 | * drop the configuration (e.g. address) here. Note, if the configuration is known, | |
962 | * it will be handled later by link_drop_foreign_addresses() or so. */ | |
963 | if (req->waiting_reply && link->state != LINK_STATE_LINGER) | |
964 | switch (req->type) { | |
965 | case REQUEST_TYPE_ADDRESS: { | |
966 | Address *address = ASSERT_PTR(req->userdata); | |
967 | ||
968 | if (address_get(link, address, NULL) < 0) | |
969 | RET_GATHER(ret, address_remove(address, link)); | |
970 | break; | |
971 | } | |
c902fa08 YW |
972 | case REQUEST_TYPE_NEIGHBOR: { |
973 | Neighbor *neighbor = ASSERT_PTR(req->userdata); | |
974 | ||
975 | if (neighbor_get(link, neighbor, NULL) < 0) | |
976 | RET_GATHER(ret, neighbor_remove(neighbor, link)); | |
977 | break; | |
978 | } | |
9a988d16 YW |
979 | case REQUEST_TYPE_NEXTHOP: { |
980 | NextHop *nexthop = ASSERT_PTR(req->userdata); | |
981 | ||
982 | if (nexthop_get_by_id(link->manager, nexthop->id, NULL) < 0) | |
983 | RET_GATHER(ret, nexthop_remove(nexthop, link->manager)); | |
984 | break; | |
985 | } | |
4303e980 YW |
986 | default: |
987 | ; | |
988 | } | |
989 | ||
990 | request_detach(link->manager, req); | |
991 | } | |
992 | ||
993 | return ret; | |
56001f02 YW |
994 | } |
995 | ||
cc2d7efc | 996 | static Link *link_drop(Link *link) { |
63130eb3 | 997 | if (!link) |
cc2d7efc | 998 | return NULL; |
0d4ad91d | 999 | |
63130eb3 YW |
1000 | assert(link->manager); |
1001 | ||
0d4ad91d AR |
1002 | link_set_state(link, LINK_STATE_LINGER); |
1003 | ||
63130eb3 YW |
1004 | /* Drop all references from other links and manager. Note that async netlink calls may have |
1005 | * references to the link, and they will be dropped when we receive replies. */ | |
1006 | ||
4303e980 | 1007 | (void) link_drop_requests(link); |
56001f02 | 1008 | |
bb193d2d YW |
1009 | link_free_bound_to_list(link); |
1010 | link_free_bound_by_list(link); | |
0d4ad91d | 1011 | |
b0ff6dea YW |
1012 | link_clear_sr_iov_ifindices(link); |
1013 | ||
81357285 | 1014 | link_drop_from_master(link); |
5f707e12 | 1015 | |
4c78dc17 YW |
1016 | if (link->state_file) |
1017 | (void) unlink(link->state_file); | |
1018 | ||
63130eb3 YW |
1019 | link_clean(link); |
1020 | ||
0b54c870 YW |
1021 | STRV_FOREACH(n, link->alternative_names) |
1022 | hashmap_remove(link->manager->links_by_name, *n); | |
0b54c870 YW |
1023 | hashmap_remove(link->manager->links_by_name, link->ifname); |
1024 | ||
fe321d45 | 1025 | /* bonding master and its slaves have the same hardware address. */ |
e74f1d07 | 1026 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 | 1027 | |
63130eb3 | 1028 | /* The following must be called at last. */ |
6eab614d | 1029 | assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link); |
cc2d7efc | 1030 | return link_unref(link); |
0d4ad91d AR |
1031 | } |
1032 | ||
5e5b137a | 1033 | static int link_drop_foreign_config(Link *link) { |
1339b950 | 1034 | int r; |
0b81225e YW |
1035 | |
1036 | assert(link); | |
1037 | assert(link->manager); | |
5e5b137a | 1038 | |
5e3bb5da YW |
1039 | /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want |
1040 | * to remove loopback address or addresses used for root NFS. */ | |
1041 | ||
1042 | if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
1043 | return 0; | |
1044 | if (FLAGS_SET(link->flags, IFF_LOOPBACK)) | |
1045 | return 0; | |
1046 | if (link->network->keep_configuration == KEEP_CONFIGURATION_YES) | |
1047 | return 0; | |
1048 | ||
e36d601c | 1049 | r = link_drop_foreign_routes(link); |
5e5b137a | 1050 | |
1339b950 ZJS |
1051 | RET_GATHER(r, link_drop_foreign_nexthops(link)); |
1052 | RET_GATHER(r, link_drop_foreign_addresses(link)); | |
1053 | RET_GATHER(r, link_drop_foreign_neighbors(link)); | |
1054 | RET_GATHER(r, manager_drop_foreign_routing_policy_rules(link->manager)); | |
0b81225e YW |
1055 | |
1056 | return r; | |
5e5b137a TG |
1057 | } |
1058 | ||
a0e99a37 | 1059 | static int link_drop_managed_config(Link *link) { |
1339b950 | 1060 | int r; |
0b81225e YW |
1061 | |
1062 | assert(link); | |
1063 | assert(link->manager); | |
3104883d | 1064 | |
a0e99a37 | 1065 | r = link_drop_managed_routes(link); |
3104883d | 1066 | |
1339b950 ZJS |
1067 | RET_GATHER(r, link_drop_managed_nexthops(link)); |
1068 | RET_GATHER(r, link_drop_managed_addresses(link)); | |
1069 | RET_GATHER(r, link_drop_managed_neighbors(link)); | |
1070 | RET_GATHER(r, link_drop_managed_routing_policy_rules(link)); | |
3104883d | 1071 | |
0b81225e | 1072 | return r; |
3104883d SS |
1073 | } |
1074 | ||
b4564f4e YW |
1075 | static void link_foreignize_config(Link *link) { |
1076 | assert(link); | |
1077 | assert(link->manager); | |
1078 | ||
1079 | link_foreignize_routes(link); | |
1080 | link_foreignize_nexthops(link); | |
1081 | link_foreignize_addresses(link); | |
1082 | link_foreignize_neighbors(link); | |
1083 | link_foreignize_routing_policy_rules(link); | |
1084 | } | |
1085 | ||
c3b94251 | 1086 | static int link_configure(Link *link) { |
4ecdcb07 YW |
1087 | int r; |
1088 | ||
ef1ba606 | 1089 | assert(link); |
b22d8a00 | 1090 | assert(link->network); |
bd08ce56 | 1091 | assert(link->state == LINK_STATE_INITIALIZED); |
a748b692 | 1092 | |
1187fc33 YW |
1093 | link_set_state(link, LINK_STATE_CONFIGURING); |
1094 | ||
3cf58ef3 YW |
1095 | r = link_new_bound_to_list(link); |
1096 | if (r < 0) | |
1097 | return r; | |
1098 | ||
1dec9d81 | 1099 | r = link_request_traffic_control(link); |
4ecdcb07 YW |
1100 | if (r < 0) |
1101 | return r; | |
1102 | ||
941f8e13 YW |
1103 | r = link_configure_mtu(link); |
1104 | if (r < 0) | |
1105 | return r; | |
1106 | ||
7558f9e7 YW |
1107 | if (link->iftype == ARPHRD_CAN) { |
1108 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
1109 | r = link_request_to_set_can(link); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | ||
1113 | return link_request_to_activate(link); | |
1114 | } | |
1115 | ||
cb8453cc | 1116 | r = link_request_sr_iov_vfs(link); |
518cd6b5 SS |
1117 | if (r < 0) |
1118 | return r; | |
1119 | ||
5e0534f1 | 1120 | r = link_set_sysctl(link); |
b69c3180 SS |
1121 | if (r < 0) |
1122 | return r; | |
8749cbcd | 1123 | |
d05c332c | 1124 | r = link_request_to_set_mac(link, /* allow_retry = */ true); |
e16e4b3b DS |
1125 | if (r < 0) |
1126 | return r; | |
1127 | ||
72e65e6f YW |
1128 | r = link_request_to_set_ipoib(link); |
1129 | if (r < 0) | |
1130 | return r; | |
1131 | ||
1187fc33 | 1132 | r = link_request_to_set_flags(link); |
e16e4b3b DS |
1133 | if (r < 0) |
1134 | return r; | |
1135 | ||
1187fc33 | 1136 | r = link_request_to_set_group(link); |
99d2baa2 SS |
1137 | if (r < 0) |
1138 | return r; | |
1139 | ||
1187fc33 YW |
1140 | r = link_request_to_set_addrgen_mode(link); |
1141 | if (r < 0) | |
1142 | return r; | |
1143 | ||
1144 | r = link_request_to_set_master(link); | |
1145 | if (r < 0) | |
1146 | return r; | |
1147 | ||
1148 | r = link_request_stacked_netdevs(link); | |
1149 | if (r < 0) | |
1150 | return r; | |
1151 | ||
1152 | r = link_request_to_set_bond(link); | |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | ||
1156 | r = link_request_to_set_bridge(link); | |
1157 | if (r < 0) | |
1158 | return r; | |
1159 | ||
1160 | r = link_request_to_set_bridge_vlan(link); | |
1161 | if (r < 0) | |
1162 | return r; | |
1163 | ||
1164 | r = link_request_to_activate(link); | |
89fe6535 SS |
1165 | if (r < 0) |
1166 | return r; | |
1167 | ||
2ffd6d73 YW |
1168 | r = ipv4ll_configure(link); |
1169 | if (r < 0) | |
1170 | return r; | |
64b21ece | 1171 | |
ccffa166 | 1172 | r = link_request_dhcp4_client(link); |
2ffd6d73 YW |
1173 | if (r < 0) |
1174 | return r; | |
eb34d4af | 1175 | |
ccffa166 | 1176 | r = link_request_dhcp6_client(link); |
2ffd6d73 YW |
1177 | if (r < 0) |
1178 | return r; | |
f5a8c43f | 1179 | |
ba4c7184 | 1180 | r = link_request_ndisc(link); |
2ffd6d73 YW |
1181 | if (r < 0) |
1182 | return r; | |
4138fb2c | 1183 | |
1d28a3cf YW |
1184 | r = link_request_dhcp_server(link); |
1185 | if (r < 0) | |
1186 | return r; | |
1187 | ||
a254fab2 | 1188 | r = link_request_radv(link); |
086b8853 YW |
1189 | if (r < 0) |
1190 | return r; | |
7465dd22 | 1191 | |
2ffd6d73 YW |
1192 | r = link_lldp_rx_configure(link); |
1193 | if (r < 0) | |
1194 | return r; | |
ce43e484 | 1195 | |
c01b9b87 YW |
1196 | r = link_lldp_tx_configure(link); |
1197 | if (r < 0) | |
1198 | return r; | |
1199 | ||
5e3bb5da YW |
1200 | r = link_drop_foreign_config(link); |
1201 | if (r < 0) | |
1202 | return r; | |
4c649652 | 1203 | |
1187fc33 YW |
1204 | r = link_request_static_configs(link); |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
1208 | if (!link_has_carrier(link)) | |
1209 | return 0; | |
1210 | ||
1211 | return link_acquire_dynamic_conf(link); | |
505f8da7 TG |
1212 | } |
1213 | ||
170e88c8 YW |
1214 | static int link_get_network(Link *link, Network **ret) { |
1215 | Network *network; | |
1a3caa49 | 1216 | int r; |
170e88c8 YW |
1217 | |
1218 | assert(link); | |
1219 | assert(link->manager); | |
1220 | assert(ret); | |
1221 | ||
1222 | ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { | |
1223 | bool warn = false; | |
1224 | ||
1a3caa49 | 1225 | r = net_match_config( |
170e88c8 | 1226 | &network->match, |
8de56fb3 | 1227 | link->dev, |
52135071 YW |
1228 | &link->hw_addr, |
1229 | &link->permanent_hw_addr, | |
170e88c8 YW |
1230 | link->driver, |
1231 | link->iftype, | |
65022cd7 | 1232 | link->kind, |
170e88c8 YW |
1233 | link->ifname, |
1234 | link->alternative_names, | |
1235 | link->wlan_iftype, | |
1236 | link->ssid, | |
1a3caa49 YW |
1237 | &link->bssid); |
1238 | if (r < 0) | |
1239 | return r; | |
1240 | if (r == 0) | |
170e88c8 YW |
1241 | continue; |
1242 | ||
8de56fb3 | 1243 | if (network->match.ifname && link->dev) { |
170e88c8 YW |
1244 | uint8_t name_assign_type = NET_NAME_UNKNOWN; |
1245 | const char *attr; | |
1246 | ||
8de56fb3 | 1247 | if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0) |
170e88c8 YW |
1248 | (void) safe_atou8(attr, &name_assign_type); |
1249 | ||
1250 | warn = name_assign_type == NET_NAME_ENUM; | |
1251 | } | |
1252 | ||
1253 | log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, | |
1254 | "found matching network '%s'%s.", | |
1255 | network->filename, | |
1256 | warn ? ", based on potentially unpredictable interface name" : ""); | |
1257 | ||
1258 | if (network->unmanaged) | |
1259 | return -ENOENT; | |
1260 | ||
1261 | *ret = network; | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | return -ENOENT; | |
1266 | } | |
1267 | ||
8a4ad01a | 1268 | int link_reconfigure_impl(Link *link, bool force) { |
cb71e9c6 | 1269 | Network *network = NULL; |
9aa2585e | 1270 | NetDev *netdev = NULL; |
ad932b15 YW |
1271 | int r; |
1272 | ||
5a1860f7 | 1273 | assert(link); |
572b21d9 | 1274 | |
4faca0a3 | 1275 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER)) |
fb961119 YW |
1276 | return 0; |
1277 | ||
9aa2585e YW |
1278 | r = netdev_get(link->manager, link->ifname, &netdev); |
1279 | if (r < 0 && r != -ENOENT) | |
1280 | return r; | |
1281 | ||
170e88c8 | 1282 | r = link_get_network(link, &network); |
cb71e9c6 | 1283 | if (r < 0 && r != -ENOENT) |
ad932b15 YW |
1284 | return r; |
1285 | ||
fb961119 YW |
1286 | if (link->state != LINK_STATE_UNMANAGED && !network) |
1287 | /* If link is in initialized state, then link->network is also NULL. */ | |
1288 | force = true; | |
1289 | ||
99b8517c | 1290 | if (link->network == network && !force) |
ad932b15 YW |
1291 | return 0; |
1292 | ||
fb961119 | 1293 | if (network) { |
b993e7e7 YW |
1294 | _cleanup_free_ char *joined = strv_join(network->dropins, ", "); |
1295 | ||
fb961119 | 1296 | if (link->state == LINK_STATE_INITIALIZED) |
b993e7e7 YW |
1297 | log_link_info(link, "Configuring with %s%s%s%s.", |
1298 | network->filename, | |
1299 | isempty(joined) ? "" : " (dropins: ", | |
1300 | joined, | |
1301 | isempty(joined) ? "" : ")"); | |
fb961119 | 1302 | else |
b993e7e7 YW |
1303 | log_link_info(link, "Reconfiguring with %s%s%s%s.", |
1304 | network->filename, | |
1305 | isempty(joined) ? "" : " (dropins: ", | |
1306 | joined, | |
1307 | isempty(joined) ? "" : ")"); | |
fb961119 YW |
1308 | } else |
1309 | log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO, | |
1310 | "Unmanaging interface."); | |
ad932b15 YW |
1311 | |
1312 | /* Dropping old .network file */ | |
2a99eed0 | 1313 | r = link_stop_engines(link, false); |
572b21d9 | 1314 | if (r < 0) |
ad932b15 | 1315 | return r; |
ad932b15 | 1316 | |
4303e980 YW |
1317 | r = link_drop_requests(link); |
1318 | if (r < 0) | |
1319 | return r; | |
19d9a5ad | 1320 | |
81db4f3d | 1321 | if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES) |
b4564f4e YW |
1322 | /* When a new/updated .network file is assigned, first make all configs (addresses, |
1323 | * routes, and so on) foreign, and then drop unnecessary configs later by | |
81db4f3d YW |
1324 | * link_drop_foreign_config() in link_configure(). |
1325 | * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence, | |
1326 | * here we need to drop the configs such as addresses, routes, and so on configured by | |
1327 | * the previously assigned .network file. */ | |
b4564f4e YW |
1328 | link_foreignize_config(link); |
1329 | else { | |
a0e99a37 YW |
1330 | /* Remove all managed configs. Note, foreign configs are removed in later by |
1331 | * link_configure() -> link_drop_foreign_config() if the link is managed by us. */ | |
1332 | r = link_drop_managed_config(link); | |
b4564f4e YW |
1333 | if (r < 0) |
1334 | return r; | |
1335 | } | |
ad932b15 | 1336 | |
3cf58ef3 YW |
1337 | /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the |
1338 | * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will | |
1339 | * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the | |
1340 | * map here, as it depends on .network files assigned to other links. */ | |
1341 | link_free_bound_to_list(link); | |
1342 | ||
ad932b15 YW |
1343 | link_free_engines(link); |
1344 | link->network = network_unref(link->network); | |
1345 | ||
9aa2585e YW |
1346 | netdev_unref(link->netdev); |
1347 | link->netdev = netdev_ref(netdev); | |
1348 | ||
cb71e9c6 YW |
1349 | if (!network) { |
1350 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1351 | return 0; | |
1352 | } | |
1353 | ||
ad932b15 | 1354 | /* Then, apply new .network file */ |
9092113d | 1355 | link->network = network_ref(network); |
b156a95d | 1356 | link_update_operstate(link, true); |
9092113d | 1357 | link_dirty(link); |
ad932b15 | 1358 | |
ad932b15 | 1359 | link_set_state(link, LINK_STATE_INITIALIZED); |
61135582 | 1360 | link->activated = false; |
ad932b15 | 1361 | |
ad932b15 YW |
1362 | r = link_configure(link); |
1363 | if (r < 0) | |
1364 | return r; | |
1365 | ||
0e397560 | 1366 | return 1; |
ad932b15 YW |
1367 | } |
1368 | ||
96f5f9ef | 1369 | static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) { |
572b21d9 YW |
1370 | int r; |
1371 | ||
d09a179e YW |
1372 | assert(link); |
1373 | ||
5a1860f7 YW |
1374 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state"); |
1375 | if (r <= 0) | |
1376 | return r; | |
1377 | ||
7f80fa12 | 1378 | r = link_reconfigure_impl(link, force); |
d09a179e | 1379 | if (r < 0) { |
572b21d9 | 1380 | link_enter_failed(link); |
d09a179e YW |
1381 | return 0; |
1382 | } | |
572b21d9 | 1383 | |
d09a179e | 1384 | return r; |
572b21d9 YW |
1385 | } |
1386 | ||
5a1860f7 | 1387 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1388 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
5a1860f7 | 1389 | } |
572b21d9 | 1390 | |
5a1860f7 | 1391 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1392 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true); |
572b21d9 YW |
1393 | } |
1394 | ||
a39a9ac8 | 1395 | int link_reconfigure(Link *link, bool force) { |
d09a179e YW |
1396 | int r; |
1397 | ||
1398 | assert(link); | |
d09a179e | 1399 | |
8bceafa7 | 1400 | /* When link in pending or initialized state, then link_configure() will be called. To prevent |
f8dd4077 ZJS |
1401 | * the function from being called multiple times simultaneously, refuse to reconfigure the |
1402 | * interface in these cases. */ | |
8bceafa7 | 1403 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
f8dd4077 | 1404 | return 0; /* 0 means no-op. */ |
2c0d7ed3 | 1405 | |
a39a9ac8 | 1406 | r = link_call_getlink(link, force ? link_force_reconfigure_handler : link_reconfigure_handler); |
572b21d9 YW |
1407 | if (r < 0) |
1408 | return r; | |
1409 | ||
8bceafa7 | 1410 | return 1; /* 1 means the interface will be reconfigured. */ |
572b21d9 YW |
1411 | } |
1412 | ||
e6bf7774 | 1413 | static int link_initialized_and_synced(Link *link) { |
505f8da7 TG |
1414 | int r; |
1415 | ||
1416 | assert(link); | |
505f8da7 TG |
1417 | assert(link->manager); |
1418 | ||
faa2e64f YW |
1419 | if (link->manager->test_mode) { |
1420 | log_link_debug(link, "Running in test mode, refusing to enter initialized state."); | |
1421 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1422 | return 0; | |
1423 | } | |
1424 | ||
40695457 YW |
1425 | if (link->state == LINK_STATE_PENDING) { |
1426 | log_link_debug(link, "Link state is up-to-date"); | |
1427 | link_set_state(link, LINK_STATE_INITIALIZED); | |
505f8da7 | 1428 | |
40695457 YW |
1429 | r = link_new_bound_by_list(link); |
1430 | if (r < 0) | |
1431 | return r; | |
0d4ad91d | 1432 | |
40695457 YW |
1433 | r = link_handle_bound_by_list(link); |
1434 | if (r < 0) | |
1435 | return r; | |
1436 | } | |
0d4ad91d | 1437 | |
fb961119 | 1438 | return link_reconfigure_impl(link, /* force = */ false); |
505f8da7 TG |
1439 | } |
1440 | ||
302a796f | 1441 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4ff296b0 YW |
1442 | int r; |
1443 | ||
5a1860f7 YW |
1444 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized"); |
1445 | if (r <= 0) | |
0b54c870 | 1446 | return r; |
572b21d9 | 1447 | |
4ff296b0 YW |
1448 | r = link_initialized_and_synced(link); |
1449 | if (r < 0) | |
1450 | link_enter_failed(link); | |
5a1860f7 YW |
1451 | |
1452 | return 0; | |
e6bf7774 YW |
1453 | } |
1454 | ||
3be9d62a | 1455 | static int link_initialized(Link *link, sd_device *device) { |
b0ff6dea YW |
1456 | int r; |
1457 | ||
4f561e8e | 1458 | assert(link); |
4f561e8e TG |
1459 | assert(device); |
1460 | ||
160203e9 YW |
1461 | /* Always replace with the new sd_device object. As the sysname (and possibly other properties |
1462 | * or sysattrs) may be outdated. */ | |
8de56fb3 | 1463 | device_unref_and_replace(link->dev, device); |
4f561e8e | 1464 | |
3b1dbdf0 YW |
1465 | if (link->dhcp_client) { |
1466 | r = sd_dhcp_client_attach_device(link->dhcp_client, link->dev); | |
1467 | if (r < 0) | |
1468 | log_link_warning_errno(link, r, "Failed to attach device to DHCPv4 client, ignoring: %m"); | |
1469 | } | |
1470 | ||
1471 | if (link->dhcp6_client) { | |
1472 | r = sd_dhcp6_client_attach_device(link->dhcp6_client, link->dev); | |
1473 | if (r < 0) | |
1474 | log_link_warning_errno(link, r, "Failed to attach device to DHCPv6 client, ignoring: %m"); | |
1475 | } | |
1476 | ||
b0ff6dea YW |
1477 | r = link_set_sr_iov_ifindices(link); |
1478 | if (r < 0) | |
1479 | log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m"); | |
1480 | ||
40695457 YW |
1481 | if (link->state != LINK_STATE_PENDING) |
1482 | return link_reconfigure(link, /* force = */ false); | |
679b3605 | 1483 | |
79008bdd | 1484 | log_link_debug(link, "udev initialized link"); |
4f561e8e | 1485 | |
3c9b8860 TG |
1486 | /* udev has initialized the link, but we don't know if we have yet |
1487 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1488 | * when it returns we know that the pending NEWLINKs have already been | |
1489 | * processed and that we are up-to-date */ | |
4f561e8e | 1490 | |
5a1860f7 | 1491 | return link_call_getlink(link, link_initialized_handler); |
cc2d7efc YW |
1492 | } |
1493 | ||
0d411b7f | 1494 | static int link_check_initialized(Link *link) { |
51517f9e | 1495 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
5a937ea2 | 1496 | int r; |
505f8da7 | 1497 | |
0d411b7f | 1498 | assert(link); |
505f8da7 | 1499 | |
82f52245 | 1500 | if (!udev_available()) |
0d411b7f | 1501 | return link_initialized_and_synced(link); |
852a3916 YW |
1502 | |
1503 | /* udev should be around */ | |
0ac655a6 | 1504 | r = sd_device_new_from_ifindex(&device, link->ifindex); |
852a3916 YW |
1505 | if (r < 0) { |
1506 | log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | r = sd_device_get_is_initialized(device); | |
0d411b7f YW |
1511 | if (r < 0) |
1512 | return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); | |
852a3916 YW |
1513 | if (r == 0) { |
1514 | /* not yet ready */ | |
1515 | log_link_debug(link, "link pending udev initialization..."); | |
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | r = device_is_renaming(device); | |
0d411b7f YW |
1520 | if (r < 0) |
1521 | return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); | |
852a3916 YW |
1522 | if (r > 0) { |
1523 | log_link_debug(link, "Interface is being renamed, pending initialization."); | |
1524 | return 0; | |
4f561e8e | 1525 | } |
505f8da7 | 1526 | |
0d411b7f | 1527 | return link_initialized(link, device); |
a748b692 TG |
1528 | } |
1529 | ||
1fd3ac1e | 1530 | int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) { |
3be9d62a | 1531 | int r, ifindex; |
ba87a61d | 1532 | const char *s; |
1fd3ac1e | 1533 | Link *link; |
3be9d62a YW |
1534 | |
1535 | assert(m); | |
1536 | assert(device); | |
1537 | ||
3be9d62a | 1538 | r = sd_device_get_ifindex(device, &ifindex); |
1fd3ac1e YW |
1539 | if (r < 0) |
1540 | return log_device_debug_errno(device, r, "Failed to get ifindex: %m"); | |
3be9d62a | 1541 | |
75255a8d YW |
1542 | r = link_get_by_index(m, ifindex, &link); |
1543 | if (r < 0) { | |
1544 | /* This error is not critical, as the corresponding rtnl message may be received later. */ | |
1545 | log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); | |
1546 | return 0; | |
1547 | } | |
1548 | ||
1549 | /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link | |
1550 | * object here. It will be removed only when rtnetlink says so. */ | |
1551 | if (action == SD_DEVICE_REMOVE) { | |
1552 | link->dev = sd_device_unref(link->dev); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
3be9d62a | 1556 | r = device_is_renaming(device); |
1fd3ac1e YW |
1557 | if (r < 0) |
1558 | return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m"); | |
3be9d62a | 1559 | if (r > 0) { |
1fd3ac1e | 1560 | log_device_debug(device, "Device is renaming, waiting for the interface to be renamed."); |
71cdfe16 YW |
1561 | /* TODO: |
1562 | * What happens when a device is initialized, then soon renamed after that? When we detect | |
1563 | * such, maybe we should cancel or postpone all queued requests for the interface. */ | |
3be9d62a YW |
1564 | return 0; |
1565 | } | |
1566 | ||
ba87a61d YW |
1567 | r = sd_device_get_property_value(device, "ID_NET_MANAGED_BY", &s); |
1568 | if (r < 0 && r != -ENOENT) | |
1569 | log_device_debug_errno(device, r, "Failed to get ID_NET_MANAGED_BY udev property, ignoring: %m"); | |
1570 | if (r >= 0 && !streq(s, "io.systemd.Network")) { | |
1571 | log_device_debug(device, "Interface is requested to be managed by '%s', not managing the interface.", s); | |
1572 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1573 | return 0; | |
1574 | } | |
1575 | ||
4b9a8c2b YW |
1576 | r = link_initialized(link, device); |
1577 | if (r < 0) | |
1578 | link_enter_failed(link); | |
3be9d62a YW |
1579 | |
1580 | return 0; | |
1581 | } | |
1582 | ||
9c0a72f9 | 1583 | static int link_carrier_gained(Link *link) { |
6706ce2f | 1584 | bool force_reconfigure; |
9c0a72f9 TG |
1585 | int r; |
1586 | ||
1587 | assert(link); | |
1588 | ||
6706ce2f YW |
1589 | r = event_source_disable(link->carrier_lost_timer); |
1590 | if (r < 0) | |
1591 | log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m"); | |
1592 | ||
d9910948 YW |
1593 | /* If a wireless interface was connected to an access point, and the SSID is changed (that is, |
1594 | * both previous_ssid and ssid are non-NULL), then the connected wireless network could be | |
1595 | * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be | |
1596 | * restarted, and the correct network information will be gained. | |
1597 | * | |
1598 | * However, do not reconfigure the wireless interface forcibly if it was not connected to any | |
1599 | * access points previously (previous_ssid is NULL in this case). As, a .network file may be | |
1600 | * already assigned to the interface (in that case, the .network file does not have the SSID= | |
1601 | * setting in the [Match] section), and the interface is already being configured. Of course, | |
1602 | * there may exist another .network file with higher priority and a matching SSID= setting. But | |
1603 | * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag. | |
1604 | * | |
6706ce2f | 1605 | * For non-wireless interfaces, we have no way to detect the connected network change. So, |
d9910948 YW |
1606 | * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */ |
1607 | force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid); | |
6706ce2f YW |
1608 | link->previous_ssid = mfree(link->previous_ssid); |
1609 | ||
986b2514 AŠ |
1610 | /* AP and P2P-GO interfaces may have a new SSID - update the link properties in case a new .network |
1611 | * profile wants to match on it with SSID= in its [Match] section. | |
1612 | */ | |
1613 | if (IN_SET(link->wlan_iftype, NL80211_IFTYPE_AP, NL80211_IFTYPE_P2P_GO)) { | |
1614 | r = link_get_wlan_interface(link); | |
1615 | if (r < 0) | |
1616 | return r; | |
1617 | } | |
1618 | ||
081466bd YW |
1619 | /* At this stage, both wlan and link information should be up-to-date. Hence, it is not necessary to |
1620 | * call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or NL80211_CMD_GET_STATION commands, and simply call | |
1621 | * link_reconfigure_impl(). Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */ | |
1622 | r = link_reconfigure_impl(link, force_reconfigure); | |
1623 | if (r != 0) | |
1624 | return r; | |
b7ac1284 | 1625 | |
aa9117c0 YW |
1626 | r = link_handle_bound_by_list(link); |
1627 | if (r < 0) | |
1628 | return r; | |
1629 | ||
600b7898 YW |
1630 | if (link->iftype == ARPHRD_CAN) |
1631 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 | 1632 | return 0; |
600b7898 | 1633 | |
b9ea3d2e | 1634 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
8566df79 | 1635 | r = link_acquire_dynamic_conf(link); |
f0269653 | 1636 | if (r < 0) |
9c0a72f9 | 1637 | return r; |
6fc25497 | 1638 | |
97108953 | 1639 | r = link_request_static_configs(link); |
6fc25497 SS |
1640 | if (r < 0) |
1641 | return r; | |
9c0a72f9 TG |
1642 | } |
1643 | ||
aa9117c0 | 1644 | return 0; |
9c0a72f9 TG |
1645 | } |
1646 | ||
6706ce2f YW |
1647 | static int link_carrier_lost_impl(Link *link) { |
1648 | int r, ret = 0; | |
1649 | ||
1650 | assert(link); | |
1651 | ||
1652 | link->previous_ssid = mfree(link->previous_ssid); | |
1653 | ||
1654 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1655 | return 0; | |
1656 | ||
1657 | if (!link->network) | |
1658 | return 0; | |
1659 | ||
1660 | r = link_stop_engines(link, false); | |
1661 | if (r < 0) | |
1662 | ret = r; | |
1663 | ||
a0e99a37 | 1664 | r = link_drop_managed_config(link); |
6706ce2f YW |
1665 | if (r < 0 && ret >= 0) |
1666 | ret = r; | |
1667 | ||
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
99534007 | 1672 | Link *link = ASSERT_PTR(userdata); |
6706ce2f YW |
1673 | int r; |
1674 | ||
6706ce2f YW |
1675 | r = link_carrier_lost_impl(link); |
1676 | if (r < 0) { | |
1677 | log_link_warning_errno(link, r, "Failed to process carrier lost event: %m"); | |
1678 | link_enter_failed(link); | |
1679 | } | |
1680 | ||
1681 | return 0; | |
1682 | } | |
1683 | ||
9c0a72f9 | 1684 | static int link_carrier_lost(Link *link) { |
b7326069 YW |
1685 | uint16_t dhcp_mtu; |
1686 | usec_t usec; | |
9c0a72f9 TG |
1687 | int r; |
1688 | ||
1689 | assert(link); | |
1690 | ||
aa9117c0 YW |
1691 | r = link_handle_bound_by_list(link); |
1692 | if (r < 0) | |
1693 | return r; | |
93b4dab5 | 1694 | |
600b7898 YW |
1695 | if (link->iftype == ARPHRD_CAN) |
1696 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 YW |
1697 | return 0; |
1698 | ||
f1c22cf4 YW |
1699 | if (!link->network) |
1700 | return 0; | |
1701 | ||
b7326069 YW |
1702 | if (link->network->ignore_carrier_loss_set) |
1703 | /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */ | |
1704 | usec = link->network->ignore_carrier_loss_usec; | |
1705 | ||
1706 | else if (link->network->bond && link->wlan_iftype > 0) | |
1707 | /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its | |
1708 | * carrier to be lost. See #19832. */ | |
1709 | usec = 3 * USEC_PER_SEC; | |
1710 | ||
1711 | else if (link->network->dhcp_use_mtu && | |
1712 | link->dhcp_lease && | |
1713 | sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 && | |
1714 | dhcp_mtu != link->original_mtu) | |
1715 | /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static | |
1716 | * MTU should not cause any issues, as MTU is changed only once. However, setting MTU | |
1717 | * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */ | |
1718 | usec = 5 * USEC_PER_SEC; | |
1719 | ||
1720 | else | |
27438545 | 1721 | /* Otherwise, use the implied default value. */ |
b7326069 YW |
1722 | usec = link->network->ignore_carrier_loss_usec; |
1723 | ||
1724 | if (usec == USEC_INFINITY) | |
aa9117c0 | 1725 | return 0; |
600b7898 | 1726 | |
b7326069 | 1727 | if (usec == 0) |
6706ce2f YW |
1728 | return link_carrier_lost_impl(link); |
1729 | ||
1730 | return event_reset_time_relative(link->manager->event, | |
1731 | &link->carrier_lost_timer, | |
ba4e0427 | 1732 | CLOCK_BOOTTIME, |
b7326069 | 1733 | usec, |
6706ce2f YW |
1734 | 0, |
1735 | link_carrier_lost_handler, | |
1736 | link, | |
1737 | 0, | |
1738 | "link-carrier-loss", | |
1739 | true); | |
0c9ee5d5 YW |
1740 | } |
1741 | ||
0c9ee5d5 YW |
1742 | static int link_admin_state_up(Link *link) { |
1743 | int r; | |
1744 | ||
1745 | assert(link); | |
1746 | ||
1747 | /* This is called every time an interface admin state changes to up; | |
1748 | * specifically, when IFF_UP flag changes from unset to set. */ | |
1749 | ||
1750 | if (!link->network) | |
1751 | return 0; | |
1752 | ||
899b0e5e | 1753 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { |
1a054a20 | 1754 | log_link_info(link, "Activation policy is \"always-down\", forcing link down."); |
712fd5d2 | 1755 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
0c9ee5d5 YW |
1756 | } |
1757 | ||
1758 | /* We set the ipv6 mtu after the device mtu, but the kernel resets | |
1759 | * ipv6 mtu on NETDEV_UP, so we need to reset it. */ | |
1760 | r = link_set_ipv6_mtu(link); | |
1761 | if (r < 0) | |
1762 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m"); | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | static int link_admin_state_down(Link *link) { | |
1768 | assert(link); | |
1769 | ||
1770 | if (!link->network) | |
1771 | return 0; | |
1772 | ||
899b0e5e | 1773 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { |
1a054a20 | 1774 | log_link_info(link, "Activation policy is \"always-up\", forcing link up."); |
712fd5d2 | 1775 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0c9ee5d5 YW |
1776 | } |
1777 | ||
1778 | return 0; | |
1779 | } | |
1780 | ||
0c9ee5d5 YW |
1781 | static bool link_is_enslaved(Link *link) { |
1782 | if (link->flags & IFF_SLAVE) | |
0c9ee5d5 YW |
1783 | return true; |
1784 | ||
1f024462 | 1785 | if (link->master_ifindex > 0) |
0c9ee5d5 YW |
1786 | return true; |
1787 | ||
0c9ee5d5 YW |
1788 | return false; |
1789 | } | |
1790 | ||
0c9ee5d5 YW |
1791 | void link_update_operstate(Link *link, bool also_update_master) { |
1792 | LinkOperationalState operstate; | |
1793 | LinkCarrierState carrier_state; | |
1794 | LinkAddressState ipv4_address_state, ipv6_address_state, address_state; | |
1795 | LinkOnlineState online_state; | |
1796 | _cleanup_strv_free_ char **p = NULL; | |
0c9ee5d5 | 1797 | bool changed = false; |
0c9ee5d5 YW |
1798 | |
1799 | assert(link); | |
1800 | ||
1801 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1802 | carrier_state = LINK_CARRIER_STATE_DORMANT; | |
1803 | else if (link_has_carrier(link)) { | |
1804 | if (link_is_enslaved(link)) | |
1805 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
1806 | else | |
1807 | carrier_state = LINK_CARRIER_STATE_CARRIER; | |
1808 | } else if (link->flags & IFF_UP) | |
1809 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; | |
1810 | else | |
1811 | carrier_state = LINK_CARRIER_STATE_OFF; | |
1812 | ||
1813 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { | |
1814 | Link *slave; | |
1815 | ||
1816 | SET_FOREACH(slave, link->slaves) { | |
1817 | link_update_operstate(slave, false); | |
1818 | ||
1819 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) | |
1820 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
1821 | } | |
1822 | } | |
1823 | ||
60415c13 | 1824 | link_get_address_states(link, &ipv4_address_state, &ipv6_address_state, &address_state); |
0c9ee5d5 YW |
1825 | |
1826 | /* Mapping of address and carrier state vs operational state | |
1827 | * carrier state | |
1828 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1829 | * ------------------------------------------------------------------------------ | |
1830 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
cf4dbd84 HH |
1831 | * address_state degraded | off | no-carrier | dormant | degraded | degraded | enslaved |
1832 | * routable | off | no-carrier | dormant | routable | routable | routable | |
0c9ee5d5 YW |
1833 | */ |
1834 | ||
cf4dbd84 HH |
1835 | if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_ROUTABLE) |
1836 | operstate = LINK_OPERSTATE_ROUTABLE; | |
1837 | else if (carrier_state == LINK_CARRIER_STATE_DEGRADED_CARRIER && address_state == LINK_ADDRESS_STATE_DEGRADED) | |
1838 | operstate = LINK_OPERSTATE_DEGRADED; | |
1839 | else if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) | |
0c9ee5d5 YW |
1840 | operstate = (LinkOperationalState) carrier_state; |
1841 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
1842 | operstate = LINK_OPERSTATE_ROUTABLE; | |
1843 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
1844 | operstate = LINK_OPERSTATE_DEGRADED; | |
1845 | else | |
1846 | operstate = LINK_OPERSTATE_ENSLAVED; | |
1847 | ||
1848 | /* Only determine online state for managed links with RequiredForOnline=yes */ | |
1849 | if (!link->network || !link->network->required_for_online) | |
1850 | online_state = _LINK_ONLINE_STATE_INVALID; | |
1851 | else if (operstate < link->network->required_operstate_for_online.min || | |
1852 | operstate > link->network->required_operstate_for_online.max) | |
1853 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1854 | else { | |
1855 | AddressFamily required_family = link->network->required_family_for_online; | |
1856 | bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; | |
1857 | bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; | |
1858 | ||
1859 | /* The operational state is within the range required for online. | |
1860 | * If a particular address family is also required, we might revert | |
1861 | * to offline in the blocks below. */ | |
1862 | online_state = LINK_ONLINE_STATE_ONLINE; | |
1863 | ||
1864 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { | |
1865 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1866 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1867 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1868 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1869 | } | |
1870 | ||
1871 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { | |
1872 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1873 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1874 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1875 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | if (link->carrier_state != carrier_state) { | |
1880 | link->carrier_state = carrier_state; | |
1881 | changed = true; | |
1882 | if (strv_extend(&p, "CarrierState") < 0) | |
1883 | log_oom(); | |
1884 | } | |
1885 | ||
1886 | if (link->address_state != address_state) { | |
1887 | link->address_state = address_state; | |
1888 | changed = true; | |
1889 | if (strv_extend(&p, "AddressState") < 0) | |
1890 | log_oom(); | |
1891 | } | |
0d4ad91d | 1892 | |
0c9ee5d5 YW |
1893 | if (link->ipv4_address_state != ipv4_address_state) { |
1894 | link->ipv4_address_state = ipv4_address_state; | |
1895 | changed = true; | |
1896 | if (strv_extend(&p, "IPv4AddressState") < 0) | |
1897 | log_oom(); | |
1898 | } | |
9c0a72f9 | 1899 | |
0c9ee5d5 YW |
1900 | if (link->ipv6_address_state != ipv6_address_state) { |
1901 | link->ipv6_address_state = ipv6_address_state; | |
1902 | changed = true; | |
1903 | if (strv_extend(&p, "IPv6AddressState") < 0) | |
1904 | log_oom(); | |
1905 | } | |
9c0a72f9 | 1906 | |
0c9ee5d5 YW |
1907 | if (link->operstate != operstate) { |
1908 | link->operstate = operstate; | |
1909 | changed = true; | |
1910 | if (strv_extend(&p, "OperationalState") < 0) | |
1911 | log_oom(); | |
1912 | } | |
9c0a72f9 | 1913 | |
0c9ee5d5 YW |
1914 | if (link->online_state != online_state) { |
1915 | link->online_state = online_state; | |
1916 | changed = true; | |
1917 | if (strv_extend(&p, "OnlineState") < 0) | |
1918 | log_oom(); | |
1919 | } | |
9c0a72f9 | 1920 | |
0c9ee5d5 YW |
1921 | if (p) |
1922 | link_send_changed_strv(link, p); | |
1923 | if (changed) | |
1924 | link_dirty(link); | |
9c0a72f9 | 1925 | |
0c9ee5d5 YW |
1926 | if (also_update_master) { |
1927 | Link *master; | |
9c0a72f9 | 1928 | |
0c9ee5d5 YW |
1929 | if (link_get_master(link, &master) >= 0) |
1930 | link_update_operstate(master, true); | |
1931 | } | |
9c0a72f9 TG |
1932 | } |
1933 | ||
0c9ee5d5 YW |
1934 | #define FLAG_STRING(string, flag, old, new) \ |
1935 | (((old ^ new) & flag) \ | |
1936 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
1937 | : "") | |
1938 | ||
0d411b7f | 1939 | static int link_update_flags(Link *link, sd_netlink_message *message) { |
96f5f9ef | 1940 | bool link_was_admin_up, had_carrier; |
0c9ee5d5 YW |
1941 | uint8_t operstate; |
1942 | unsigned flags; | |
d236718c DS |
1943 | int r; |
1944 | ||
61135582 | 1945 | assert(link); |
0d411b7f | 1946 | assert(message); |
61135582 | 1947 | |
0d411b7f | 1948 | r = sd_rtnl_message_link_get_flags(message, &flags); |
0c9ee5d5 | 1949 | if (r < 0) |
0d411b7f | 1950 | return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m"); |
3be9d62a | 1951 | |
0d411b7f YW |
1952 | r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate); |
1953 | if (r == -ENODATA) | |
1954 | /* If we got a message without operstate, assume the state was unchanged. */ | |
0c9ee5d5 | 1955 | operstate = link->kernel_operstate; |
0d411b7f YW |
1956 | else if (r < 0) |
1957 | return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m"); | |
0c9ee5d5 | 1958 | |
0d411b7f | 1959 | if (link->flags == flags && link->kernel_operstate == operstate) |
61135582 DS |
1960 | return 0; |
1961 | ||
0c9ee5d5 YW |
1962 | if (link->flags != flags) { |
1963 | unsigned unknown_flags, unknown_flags_added, unknown_flags_removed; | |
61135582 | 1964 | |
0c9ee5d5 YW |
1965 | 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", |
1966 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
1967 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
1968 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
1969 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
1970 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
1971 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
1972 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
1973 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
1974 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
1975 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
1976 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
1977 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
1978 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
1979 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
1980 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
1981 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
1982 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
1983 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
1984 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
d236718c | 1985 | |
0c9ee5d5 YW |
1986 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
1987 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
1988 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
1989 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
1990 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
1991 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
1992 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
1993 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
d236718c | 1994 | |
0c9ee5d5 YW |
1995 | if (unknown_flags_added) |
1996 | log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added); | |
61135582 | 1997 | |
0c9ee5d5 YW |
1998 | if (unknown_flags_removed) |
1999 | log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed); | |
2000 | } | |
61135582 | 2001 | |
0d411b7f YW |
2002 | link_was_admin_up = link->flags & IFF_UP; |
2003 | had_carrier = link_has_carrier(link); | |
2004 | ||
0c9ee5d5 YW |
2005 | link->flags = flags; |
2006 | link->kernel_operstate = operstate; | |
36161cba | 2007 | |
0c9ee5d5 | 2008 | link_update_operstate(link, true); |
61135582 | 2009 | |
0d411b7f YW |
2010 | if (!link_was_admin_up && (link->flags & IFF_UP)) { |
2011 | log_link_info(link, "Link UP"); | |
22936833 | 2012 | |
0d411b7f YW |
2013 | r = link_admin_state_up(link); |
2014 | if (r < 0) | |
2015 | return r; | |
2016 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) { | |
2017 | log_link_info(link, "Link DOWN"); | |
0d4ad91d | 2018 | |
0d411b7f | 2019 | r = link_admin_state_down(link); |
0d4ad91d AR |
2020 | if (r < 0) |
2021 | return r; | |
7619683b TG |
2022 | } |
2023 | ||
0d411b7f YW |
2024 | if (!had_carrier && link_has_carrier(link)) { |
2025 | log_link_info(link, "Gained carrier"); | |
0d4ad91d | 2026 | |
0d411b7f | 2027 | r = link_carrier_gained(link); |
30de2b89 YW |
2028 | if (r < 0) |
2029 | return r; | |
0d411b7f YW |
2030 | } else if (had_carrier && !link_has_carrier(link)) { |
2031 | log_link_info(link, "Lost carrier"); | |
2032 | ||
2033 | r = link_carrier_lost(link); | |
0b54c870 YW |
2034 | if (r < 0) |
2035 | return r; | |
b8941f74 TG |
2036 | } |
2037 | ||
0d411b7f YW |
2038 | return 0; |
2039 | } | |
afe7fd56 | 2040 | |
0d411b7f YW |
2041 | static int link_update_master(Link *link, sd_netlink_message *message) { |
2042 | int master_ifindex, r; | |
7465dd22 | 2043 | |
0d411b7f YW |
2044 | assert(link); |
2045 | assert(message); | |
69629de9 | 2046 | |
0d411b7f YW |
2047 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex); |
2048 | if (r == -ENODATA) | |
2049 | return 0; | |
2050 | if (r < 0) | |
2051 | return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m"); | |
807667f7 | 2052 | |
571bf1aa YW |
2053 | if (master_ifindex == link->ifindex) |
2054 | master_ifindex = 0; | |
2055 | ||
74e95e3a YW |
2056 | if (master_ifindex != link->master_ifindex) { |
2057 | if (link->master_ifindex == 0) | |
2058 | log_link_debug(link, "Attached to master interface: %i", master_ifindex); | |
2059 | else if (master_ifindex == 0) | |
2060 | log_link_debug(link, "Detached from master interface: %i", link->master_ifindex); | |
2061 | else | |
2062 | log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex, | |
2063 | special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex); | |
807667f7 | 2064 | |
74e95e3a YW |
2065 | link_drop_from_master(link); |
2066 | link->master_ifindex = master_ifindex; | |
2067 | } | |
413708d1 | 2068 | |
0d411b7f YW |
2069 | r = link_append_to_master(link); |
2070 | if (r < 0) | |
2071 | return log_link_debug_errno(link, r, "Failed to append link to master: %m"); | |
7465dd22 | 2072 | |
0d411b7f YW |
2073 | return 0; |
2074 | } | |
807667f7 | 2075 | |
e1658632 YW |
2076 | static int link_update_driver(Link *link, sd_netlink_message *message) { |
2077 | int r; | |
2078 | ||
2079 | assert(link); | |
2080 | assert(link->manager); | |
2081 | assert(message); | |
2082 | ||
2083 | /* Driver is already read. Assuming the driver is never changed. */ | |
6625c39e | 2084 | if (link->ethtool_driver_read) |
e1658632 YW |
2085 | return 0; |
2086 | ||
2087 | /* When udevd is running, read the driver after the interface is initialized by udevd. | |
2088 | * Otherwise, ethtool may not work correctly. See issue #22538. | |
2089 | * When udevd is not running, read the value when the interface is detected. */ | |
6625c39e | 2090 | if (udev_available() && !link->dev) |
e1658632 YW |
2091 | return 0; |
2092 | ||
6625c39e YW |
2093 | link->ethtool_driver_read = true; |
2094 | ||
e1658632 YW |
2095 | r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver); |
2096 | if (r < 0) { | |
2097 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
2098 | return 0; | |
2099 | } | |
2100 | ||
2101 | log_link_debug(link, "Found driver: %s", strna(link->driver)); | |
2102 | ||
2103 | if (streq_ptr(link->driver, "dsa")) { | |
2104 | uint32_t dsa_master_ifindex = 0; | |
2105 | ||
2106 | r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex); | |
2107 | if (r < 0 && r != -ENODATA) | |
2108 | return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m"); | |
2109 | ||
2110 | if (dsa_master_ifindex > INT_MAX) { | |
2111 | log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.", | |
2112 | dsa_master_ifindex); | |
2113 | dsa_master_ifindex = 0; | |
2114 | } | |
2115 | ||
2116 | link->dsa_master_ifindex = (int) dsa_master_ifindex; | |
2117 | } | |
2118 | ||
40695457 | 2119 | return 1; /* needs reconfigure */ |
e1658632 YW |
2120 | } |
2121 | ||
6625c39e | 2122 | static int link_update_permanent_hardware_address_from_ethtool(Link *link, sd_netlink_message *message) { |
e1658632 YW |
2123 | int r; |
2124 | ||
2125 | assert(link); | |
2126 | assert(link->manager); | |
2127 | assert(message); | |
2128 | ||
6625c39e | 2129 | if (link->ethtool_permanent_hw_addr_read) |
e1658632 YW |
2130 | return 0; |
2131 | ||
2132 | /* When udevd is running, read the permanent hardware address after the interface is | |
2133 | * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538. | |
2134 | * When udevd is not running, read the value when the interface is detected. */ | |
6625c39e YW |
2135 | if (udev_available() && !link->dev) |
2136 | return 0; | |
2137 | ||
2138 | /* If the interface does not have a hardware address, then it will not have a permanent address either. */ | |
2139 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL); | |
2140 | if (r == -ENODATA) | |
2141 | return 0; | |
2142 | if (r < 0) | |
2143 | return log_link_debug_errno(link, r, "Failed to read IFLA_ADDRESS attribute: %m"); | |
2144 | ||
2145 | link->ethtool_permanent_hw_addr_read = true; | |
2146 | ||
2147 | r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr); | |
2148 | if (r < 0) | |
2149 | log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m"); | |
2150 | ||
2151 | return 0; | |
2152 | } | |
2153 | ||
2154 | static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) { | |
2155 | int r; | |
2156 | ||
2157 | assert(link); | |
2158 | assert(link->manager); | |
2159 | assert(message); | |
2160 | ||
2161 | if (link->permanent_hw_addr.length > 0) | |
e1658632 YW |
2162 | return 0; |
2163 | ||
2164 | r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr); | |
2165 | if (r < 0) { | |
2166 | if (r != -ENODATA) | |
2167 | return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m"); | |
2168 | ||
6625c39e YW |
2169 | /* Fallback to ethtool for older kernels. */ |
2170 | r = link_update_permanent_hardware_address_from_ethtool(link, message); | |
2171 | if (r < 0) | |
2172 | return r; | |
e1658632 YW |
2173 | } |
2174 | ||
2175 | if (link->permanent_hw_addr.length > 0) | |
2176 | log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr)); | |
2177 | ||
40695457 | 2178 | return 1; /* needs reconfigure */ |
e1658632 YW |
2179 | } |
2180 | ||
0d411b7f | 2181 | static int link_update_hardware_address(Link *link, sd_netlink_message *message) { |
e2bacccd | 2182 | struct hw_addr_data addr; |
0d411b7f | 2183 | int r; |
d93d655c | 2184 | |
0d411b7f YW |
2185 | assert(link); |
2186 | assert(message); | |
dfc58b47 | 2187 | |
0d411b7f YW |
2188 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); |
2189 | if (r < 0 && r != -ENODATA) | |
2190 | return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m"); | |
4f882b2a | 2191 | |
e2bacccd | 2192 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr); |
0d411b7f YW |
2193 | if (r == -ENODATA) |
2194 | return 0; | |
2195 | if (r < 0) | |
fe321d45 | 2196 | return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m"); |
bb262ef0 | 2197 | |
e2bacccd | 2198 | if (hw_addr_equal(&link->hw_addr, &addr)) |
0d411b7f | 2199 | return 0; |
a61bb41c | 2200 | |
de0f1579 | 2201 | if (link->hw_addr.length == 0) |
e2bacccd | 2202 | log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr)); |
fe321d45 | 2203 | else { |
e2341b6b DT |
2204 | log_link_debug(link, "Hardware address is changed: %s %s %s", |
2205 | HW_ADDR_TO_STR(&link->hw_addr), | |
2206 | special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), | |
2207 | HW_ADDR_TO_STR(&addr)); | |
0d411b7f | 2208 | |
e74f1d07 | 2209 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 YW |
2210 | } |
2211 | ||
e2bacccd YW |
2212 | link->hw_addr = addr; |
2213 | ||
fe321d45 YW |
2214 | if (!hw_addr_is_null(&link->hw_addr)) { |
2215 | r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link); | |
2216 | if (r == -EEXIST && streq_ptr(link->kind, "bond")) | |
2217 | /* bonding master and its slaves have the same hardware address. */ | |
2218 | r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link); | |
2219 | if (r < 0) | |
2220 | log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m"); | |
2221 | } | |
0d411b7f | 2222 | |
0a14f83a | 2223 | r = ipv4acd_update_mac(link); |
76a86ffd YW |
2224 | if (r < 0) |
2225 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); | |
2226 | ||
0d411b7f | 2227 | r = ipv4ll_update_mac(link); |
a61bb41c | 2228 | if (r < 0) |
0d411b7f | 2229 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
a61bb41c | 2230 | |
0d411b7f YW |
2231 | r = dhcp4_update_mac(link); |
2232 | if (r < 0) | |
2233 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
d236718c | 2234 | |
0d411b7f YW |
2235 | r = dhcp6_update_mac(link); |
2236 | if (r < 0) | |
2237 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
2238 | ||
2239 | r = radv_update_mac(link); | |
2240 | if (r < 0) | |
2241 | return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
2242 | ||
3be64aa4 | 2243 | if (link->ndisc && link->hw_addr.length == ETH_ALEN) { |
ca2b7cd8 | 2244 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); |
d236718c | 2245 | if (r < 0) |
0d411b7f YW |
2246 | return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m"); |
2247 | } | |
d236718c | 2248 | |
35778343 YW |
2249 | if (link->lldp_rx) { |
2250 | r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether); | |
61135582 | 2251 | if (r < 0) |
c01b9b87 YW |
2252 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m"); |
2253 | } | |
2254 | ||
2255 | if (link->lldp_tx) { | |
2256 | r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether); | |
2257 | if (r < 0) | |
2258 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m"); | |
61135582 DS |
2259 | } |
2260 | ||
40695457 | 2261 | return 1; /* needs reconfigure */ |
0d411b7f | 2262 | } |
a61bb41c | 2263 | |
0d411b7f | 2264 | static int link_update_mtu(Link *link, sd_netlink_message *message) { |
717ba5fc | 2265 | uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX; |
0d411b7f | 2266 | int r; |
a61bb41c | 2267 | |
0d411b7f YW |
2268 | assert(link); |
2269 | assert(message); | |
2270 | ||
2271 | r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu); | |
2272 | if (r == -ENODATA) | |
2273 | return 0; | |
2274 | if (r < 0) | |
2275 | return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m"); | |
b5d0fd1e YW |
2276 | if (mtu == 0) |
2277 | return 0; | |
0d411b7f | 2278 | |
717ba5fc YW |
2279 | r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu); |
2280 | if (r < 0 && r != -ENODATA) | |
2281 | return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m"); | |
2282 | ||
2283 | r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu); | |
2284 | if (r < 0 && r != -ENODATA) | |
2285 | return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m"); | |
2286 | ||
717ba5fc YW |
2287 | if (max_mtu == 0) |
2288 | max_mtu = UINT32_MAX; | |
2289 | ||
2290 | link->min_mtu = min_mtu; | |
2291 | link->max_mtu = max_mtu; | |
2292 | ||
0d411b7f YW |
2293 | if (link->original_mtu == 0) { |
2294 | link->original_mtu = mtu; | |
717ba5fc YW |
2295 | log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2296 | link->original_mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2297 | } |
2298 | ||
717ba5fc YW |
2299 | if (link->mtu == mtu) |
2300 | return 0; | |
2301 | ||
b5d0fd1e | 2302 | if (link->mtu != 0) |
e2341b6b DT |
2303 | log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2304 | link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu, | |
2305 | link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2306 | |
2307 | link->mtu = mtu; | |
2308 | ||
2309 | if (link->dhcp_client) { | |
2310 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
9c0a72f9 | 2311 | if (r < 0) |
0d411b7f YW |
2312 | return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m"); |
2313 | } | |
a61bb41c | 2314 | |
0d411b7f YW |
2315 | if (link->radv) { |
2316 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
9c0a72f9 | 2317 | if (r < 0) |
0d411b7f | 2318 | return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
a61bb41c TG |
2319 | } |
2320 | ||
2321 | return 0; | |
dd3efc09 | 2322 | } |
fe8db0c5 | 2323 | |
0d411b7f YW |
2324 | static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
2325 | _cleanup_strv_free_ char **altnames = NULL; | |
0d411b7f YW |
2326 | int r; |
2327 | ||
2328 | assert(link); | |
2329 | assert(message); | |
2330 | ||
2331 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); | |
50df02a7 | 2332 | if (r == -ENODATA) |
2368ff81 | 2333 | /* The message does not have IFLA_PROP_LIST container attribute. It does not mean the |
50df02a7 YW |
2334 | * interface has no alternative name. */ |
2335 | return 0; | |
2336 | if (r < 0) | |
0d411b7f YW |
2337 | return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); |
2338 | ||
1b345c1e YW |
2339 | if (strv_equal(altnames, link->alternative_names)) |
2340 | return 0; | |
2341 | ||
0d411b7f YW |
2342 | STRV_FOREACH(n, link->alternative_names) |
2343 | hashmap_remove(link->manager->links_by_name, *n); | |
2344 | ||
2345 | strv_free_and_replace(link->alternative_names, altnames); | |
2346 | ||
2347 | STRV_FOREACH(n, link->alternative_names) { | |
2348 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); | |
2349 | if (r < 0) | |
2350 | return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m"); | |
2351 | } | |
2352 | ||
40695457 | 2353 | return 1; /* needs reconfigure */ |
0d411b7f YW |
2354 | } |
2355 | ||
2356 | static int link_update_name(Link *link, sd_netlink_message *message) { | |
01afd0f7 | 2357 | char ifname_from_index[IF_NAMESIZE]; |
0d411b7f YW |
2358 | const char *ifname; |
2359 | int r; | |
2360 | ||
2361 | assert(link); | |
2362 | assert(message); | |
2363 | ||
2364 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
2365 | if (r == -ENODATA) | |
7802194a | 2366 | /* Hmm?? But ok. */ |
0d411b7f YW |
2367 | return 0; |
2368 | if (r < 0) | |
2369 | return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m"); | |
2370 | ||
2371 | if (streq(ifname, link->ifname)) | |
2372 | return 0; | |
2373 | ||
01afd0f7 YW |
2374 | r = format_ifname(link->ifindex, ifname_from_index); |
2375 | if (r < 0) | |
2376 | return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex); | |
176b8be1 YW |
2377 | |
2378 | if (!streq(ifname, ifname_from_index)) { | |
2379 | log_link_debug(link, "New interface name '%s' received from the kernel does not correspond " | |
2380 | "with the name currently configured on the actual interface '%s'. Ignoring.", | |
2381 | ifname, ifname_from_index); | |
2382 | return 0; | |
2383 | } | |
2384 | ||
0d411b7f YW |
2385 | log_link_info(link, "Interface name change detected, renamed to %s.", ifname); |
2386 | ||
2387 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
2388 | ||
2389 | r = free_and_strdup(&link->ifname, ifname); | |
2390 | if (r < 0) | |
2391 | return log_oom_debug(); | |
2392 | ||
2393 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link); | |
2394 | if (r < 0) | |
2395 | return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m"); | |
2396 | ||
54d1fdb2 YW |
2397 | if (link->dhcp_client) { |
2398 | r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname); | |
2399 | if (r < 0) | |
2400 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m"); | |
2401 | } | |
2402 | ||
2403 | if (link->dhcp6_client) { | |
2404 | r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname); | |
2405 | if (r < 0) | |
2406 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m"); | |
2407 | } | |
2408 | ||
2409 | if (link->ndisc) { | |
2410 | r = sd_ndisc_set_ifname(link->ndisc, link->ifname); | |
2411 | if (r < 0) | |
2412 | return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m"); | |
2413 | } | |
2414 | ||
2415 | if (link->dhcp_server) { | |
2416 | r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname); | |
2417 | if (r < 0) | |
2418 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m"); | |
2419 | } | |
2420 | ||
2421 | if (link->radv) { | |
2422 | r = sd_radv_set_ifname(link->radv, link->ifname); | |
2423 | if (r < 0) | |
2424 | return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m"); | |
2425 | } | |
2426 | ||
35778343 YW |
2427 | if (link->lldp_rx) { |
2428 | r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname); | |
54d1fdb2 | 2429 | if (r < 0) |
c01b9b87 YW |
2430 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m"); |
2431 | } | |
2432 | ||
2433 | if (link->lldp_tx) { | |
2434 | r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname); | |
2435 | if (r < 0) | |
2436 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m"); | |
54d1fdb2 YW |
2437 | } |
2438 | ||
2439 | if (link->ipv4ll) { | |
2440 | r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname); | |
2441 | if (r < 0) | |
2442 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m"); | |
2443 | } | |
2444 | ||
86173383 YW |
2445 | r = ipv4acd_set_ifname(link); |
2446 | if (r < 0) | |
2447 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m"); | |
54d1fdb2 | 2448 | |
40695457 | 2449 | return 1; /* needs reconfigure */ |
0d411b7f YW |
2450 | } |
2451 | ||
2452 | static int link_update(Link *link, sd_netlink_message *message) { | |
40695457 | 2453 | bool needs_reconfigure = false; |
0d411b7f YW |
2454 | int r; |
2455 | ||
2456 | assert(link); | |
2457 | assert(message); | |
2458 | ||
2459 | r = link_update_name(link, message); | |
2460 | if (r < 0) | |
2461 | return r; | |
40695457 | 2462 | needs_reconfigure = needs_reconfigure || r > 0; |
0d411b7f YW |
2463 | |
2464 | r = link_update_alternative_names(link, message); | |
2465 | if (r < 0) | |
2466 | return r; | |
40695457 | 2467 | needs_reconfigure = needs_reconfigure || r > 0; |
0d411b7f YW |
2468 | |
2469 | r = link_update_mtu(link, message); | |
2470 | if (r < 0) | |
2471 | return r; | |
2472 | ||
e1658632 YW |
2473 | r = link_update_driver(link, message); |
2474 | if (r < 0) | |
2475 | return r; | |
40695457 | 2476 | needs_reconfigure = needs_reconfigure || r > 0; |
e1658632 YW |
2477 | |
2478 | r = link_update_permanent_hardware_address(link, message); | |
2479 | if (r < 0) | |
2480 | return r; | |
40695457 | 2481 | needs_reconfigure = needs_reconfigure || r > 0; |
e1658632 | 2482 | |
0d411b7f YW |
2483 | r = link_update_hardware_address(link, message); |
2484 | if (r < 0) | |
2485 | return r; | |
40695457 | 2486 | needs_reconfigure = needs_reconfigure || r > 0; |
0d411b7f YW |
2487 | |
2488 | r = link_update_master(link, message); | |
2489 | if (r < 0) | |
2490 | return r; | |
2491 | ||
7d0d832d YW |
2492 | r = link_update_ipv6ll_addrgen_mode(link, message); |
2493 | if (r < 0) | |
2494 | return r; | |
2495 | ||
40695457 YW |
2496 | r = link_update_flags(link, message); |
2497 | if (r < 0) | |
2498 | return r; | |
2499 | ||
11cee6ef YW |
2500 | r = link_update_bridge_vlan(link, message); |
2501 | if (r < 0) | |
2502 | return r; | |
2503 | ||
40695457 | 2504 | return needs_reconfigure; |
0d411b7f YW |
2505 | } |
2506 | ||
0c9ee5d5 YW |
2507 | static Link *link_drop_or_unref(Link *link) { |
2508 | if (!link) | |
2509 | return NULL; | |
2510 | if (!link->manager) | |
2511 | return link_unref(link); | |
2512 | return link_drop(link); | |
2513 | } | |
2514 | ||
2515 | DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); | |
2516 | ||
2517 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
0d411b7f | 2518 | _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL; |
0c9ee5d5 | 2519 | _cleanup_(link_drop_or_unrefp) Link *link = NULL; |
0c9ee5d5 YW |
2520 | unsigned short iftype; |
2521 | int r, ifindex; | |
0c9ee5d5 YW |
2522 | |
2523 | assert(manager); | |
2524 | assert(message); | |
2525 | assert(ret); | |
2526 | ||
0c9ee5d5 YW |
2527 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
2528 | if (r < 0) | |
0d411b7f | 2529 | return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m"); |
0c9ee5d5 | 2530 | else if (ifindex <= 0) |
0d411b7f | 2531 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex."); |
0c9ee5d5 YW |
2532 | |
2533 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
2534 | if (r < 0) | |
0d411b7f | 2535 | return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m"); |
0c9ee5d5 YW |
2536 | |
2537 | r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); | |
2538 | if (r < 0) | |
0d411b7f | 2539 | return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m"); |
0c9ee5d5 YW |
2540 | |
2541 | /* check for link kind */ | |
2542 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
2543 | if (r >= 0) { | |
0d411b7f YW |
2544 | r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); |
2545 | if (r < 0 && r != -ENODATA) | |
2546 | return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m"); | |
0c9ee5d5 YW |
2547 | r = sd_netlink_message_exit_container(message); |
2548 | if (r < 0) | |
0d411b7f | 2549 | return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m"); |
0c9ee5d5 YW |
2550 | } |
2551 | ||
4c78dc17 YW |
2552 | if (!manager->test_mode) { |
2553 | /* Do not update state files when running in test mode. */ | |
2554 | if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0) | |
2555 | return log_oom_debug(); | |
0d411b7f | 2556 | |
4c78dc17 YW |
2557 | if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0) |
2558 | return log_oom_debug(); | |
0d411b7f | 2559 | |
4c78dc17 YW |
2560 | if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0) |
2561 | return log_oom_debug(); | |
2562 | } | |
0d411b7f | 2563 | |
0c9ee5d5 YW |
2564 | link = new(Link, 1); |
2565 | if (!link) | |
2566 | return -ENOMEM; | |
2567 | ||
2568 | *link = (Link) { | |
2569 | .n_ref = 1, | |
2570 | .state = LINK_STATE_PENDING, | |
2571 | .online_state = _LINK_ONLINE_STATE_INVALID, | |
c2eb7753 | 2572 | .automatic_reconfigure_ratelimit = (const RateLimit) { .interval = 10 * USEC_PER_SEC, .burst = 5 }, |
0c9ee5d5 YW |
2573 | .ifindex = ifindex, |
2574 | .iftype = iftype, | |
2575 | .ifname = TAKE_PTR(ifname), | |
2576 | .kind = TAKE_PTR(kind), | |
2577 | ||
11cee6ef YW |
2578 | .bridge_vlan_pvid = UINT16_MAX, |
2579 | ||
7d0d832d YW |
2580 | .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID, |
2581 | ||
0d411b7f YW |
2582 | .state_file = TAKE_PTR(state_file), |
2583 | .lease_file = TAKE_PTR(lease_file), | |
2584 | .lldp_file = TAKE_PTR(lldp_file), | |
2585 | ||
0c9ee5d5 YW |
2586 | .n_dns = UINT_MAX, |
2587 | .dns_default_route = -1, | |
2588 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
2589 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
2590 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
2591 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
2592 | }; | |
2593 | ||
6eab614d | 2594 | r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link); |
0c9ee5d5 | 2595 | if (r < 0) |
0d411b7f | 2596 | return log_link_debug_errno(link, r, "Failed to store link into manager: %m"); |
0c9ee5d5 YW |
2597 | |
2598 | link->manager = manager; | |
2599 | ||
0d411b7f | 2600 | r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
0c9ee5d5 | 2601 | if (r < 0) |
0d411b7f | 2602 | return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m"); |
0c9ee5d5 | 2603 | |
8a77e245 YW |
2604 | log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s", |
2605 | link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind)); | |
2606 | ||
9c5b8d46 AŠ |
2607 | /* If contained in this set, the link is wireless and the corresponding NL80211_CMD_NEW_INTERFACE |
2608 | * message arrived too early. Request the wireless link information again. | |
2609 | */ | |
2610 | if (set_remove(manager->new_wlan_ifindices, INT_TO_PTR(link->ifindex))) { | |
2611 | r = link_get_wlan_interface(link); | |
2612 | if (r < 0) | |
2613 | log_link_warning_errno(link, r, "Failed to get wireless interface, ignoring: %m"); | |
2614 | } | |
2615 | ||
0c9ee5d5 | 2616 | *ret = TAKE_PTR(link); |
0c9ee5d5 YW |
2617 | return 0; |
2618 | } | |
2619 | ||
0d411b7f | 2620 | int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) { |
3be9d62a YW |
2621 | Link *link = NULL; |
2622 | NetDev *netdev = NULL; | |
2623 | uint16_t type; | |
2624 | const char *name; | |
2625 | int r, ifindex; | |
2626 | ||
2627 | assert(rtnl); | |
2628 | assert(message); | |
0d411b7f | 2629 | assert(manager); |
3be9d62a YW |
2630 | |
2631 | if (sd_netlink_message_is_error(message)) { | |
2632 | r = sd_netlink_message_get_errno(message); | |
2633 | if (r < 0) | |
2634 | log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); | |
2635 | ||
2636 | return 0; | |
2637 | } | |
2638 | ||
2639 | r = sd_netlink_message_get_type(message, &type); | |
2640 | if (r < 0) { | |
2641 | log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); | |
2642 | return 0; | |
2643 | } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { | |
2644 | log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
2649 | if (r < 0) { | |
2650 | log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); | |
2651 | return 0; | |
2652 | } else if (ifindex <= 0) { | |
2653 | log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); | |
2654 | return 0; | |
2655 | } | |
2656 | ||
2657 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
2658 | if (r < 0) { | |
2659 | log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); | |
2660 | return 0; | |
2661 | } | |
2662 | ||
6eab614d | 2663 | (void) link_get_by_index(manager, ifindex, &link); |
0d411b7f | 2664 | (void) netdev_get(manager, name, &netdev); |
3be9d62a YW |
2665 | |
2666 | switch (type) { | |
2667 | case RTM_NEWLINK: | |
0d411b7f YW |
2668 | if (netdev) { |
2669 | /* netdev exists, so make sure the ifindex matches */ | |
2670 | r = netdev_set_ifindex(netdev, message); | |
2671 | if (r < 0) { | |
66141164 | 2672 | log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m"); |
0d411b7f YW |
2673 | return 0; |
2674 | } | |
2675 | } | |
2676 | ||
3be9d62a YW |
2677 | if (!link) { |
2678 | /* link is new, so add it */ | |
0d411b7f | 2679 | r = link_new(manager, message, &link); |
3be9d62a | 2680 | if (r < 0) { |
0d411b7f | 2681 | log_warning_errno(r, "Could not process new link message: %m"); |
3be9d62a YW |
2682 | return 0; |
2683 | } | |
3be9d62a | 2684 | |
0d411b7f | 2685 | r = link_update(link, message); |
3be9d62a | 2686 | if (r < 0) { |
66141164 | 2687 | log_link_warning_errno(link, r, "Could not process link message: %m"); |
0d411b7f | 2688 | link_enter_failed(link); |
3be9d62a YW |
2689 | return 0; |
2690 | } | |
3be9d62a | 2691 | |
0d411b7f YW |
2692 | r = link_check_initialized(link); |
2693 | if (r < 0) { | |
66141164 | 2694 | log_link_warning_errno(link, r, "Failed to check link is initialized: %m"); |
0d411b7f YW |
2695 | link_enter_failed(link); |
2696 | return 0; | |
2697 | } | |
2698 | } else { | |
2699 | r = link_update(link, message); | |
2700 | if (r < 0) { | |
66141164 | 2701 | log_link_warning_errno(link, r, "Could not process link message: %m"); |
0d411b7f YW |
2702 | link_enter_failed(link); |
2703 | return 0; | |
2704 | } | |
40695457 YW |
2705 | if (r > 0) { |
2706 | r = link_reconfigure_impl(link, /* force = */ false); | |
2707 | if (r < 0) { | |
2708 | log_link_warning_errno(link, r, "Failed to reconfigure interface: %m"); | |
2709 | link_enter_failed(link); | |
2710 | return 0; | |
2711 | } | |
2712 | } | |
3be9d62a | 2713 | } |
3be9d62a YW |
2714 | break; |
2715 | ||
2716 | case RTM_DELLINK: | |
2717 | link_drop(link); | |
2718 | netdev_drop(netdev); | |
3be9d62a YW |
2719 | break; |
2720 | ||
2721 | default: | |
04499a70 | 2722 | assert_not_reached(); |
3be9d62a YW |
2723 | } |
2724 | ||
2725 | return 1; | |
2726 | } | |
2727 | ||
79c6e114 YW |
2728 | int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
2729 | uint16_t message_type; | |
2730 | int r; | |
2731 | ||
2732 | assert(m); | |
2733 | assert(link); | |
2734 | assert(error_msg); | |
2735 | ||
2736 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2737 | return 0; | |
2738 | ||
2739 | r = sd_netlink_message_get_errno(m); | |
2740 | if (r < 0) { | |
2741 | log_link_message_warning_errno(link, m, r, error_msg); | |
2742 | link_enter_failed(link); | |
2743 | return 0; | |
2744 | } | |
2745 | ||
2746 | r = sd_netlink_message_get_type(m, &message_type); | |
2747 | if (r < 0) { | |
2748 | log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m"); | |
2749 | return 0; | |
2750 | } | |
2751 | if (message_type != RTM_NEWLINK) { | |
2752 | log_link_debug(link, "rtnl: received invalid link message type, ignoring."); | |
2753 | return 0; | |
2754 | } | |
2755 | ||
2756 | r = link_update(link, m); | |
2757 | if (r < 0) { | |
2758 | link_enter_failed(link); | |
2759 | return 0; | |
2760 | } | |
2761 | ||
2762 | return 1; | |
2763 | } | |
2764 | ||
2765 | int link_call_getlink(Link *link, link_netlink_message_handler_t callback) { | |
2766 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2767 | int r; | |
2768 | ||
2769 | assert(link); | |
2770 | assert(link->manager); | |
2771 | assert(link->manager->rtnl); | |
2772 | assert(callback); | |
2773 | ||
2774 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex); | |
2775 | if (r < 0) | |
2776 | return r; | |
2777 | ||
2778 | r = netlink_call_async(link->manager->rtnl, NULL, req, callback, | |
2779 | link_netlink_destroy_callback, link); | |
2780 | if (r < 0) | |
2781 | return r; | |
2782 | ||
2783 | link_ref(link); | |
2784 | return 0; | |
2785 | } | |
2786 | ||
fe8db0c5 | 2787 | static const char* const link_state_table[_LINK_STATE_MAX] = { |
0580badc | 2788 | [LINK_STATE_PENDING] = "pending", |
bd08ce56 | 2789 | [LINK_STATE_INITIALIZED] = "initialized", |
289e6774 | 2790 | [LINK_STATE_CONFIGURING] = "configuring", |
0580badc ZJS |
2791 | [LINK_STATE_CONFIGURED] = "configured", |
2792 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
2793 | [LINK_STATE_FAILED] = "failed", | |
2794 | [LINK_STATE_LINGER] = "linger", | |
fe8db0c5 TG |
2795 | }; |
2796 | ||
2797 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
7ae55b78 YW |
2798 | |
2799 | int link_flags_to_string_alloc(uint32_t flags, char **ret) { | |
2800 | _cleanup_free_ char *str = NULL; | |
19aa7eeb ZJS |
2801 | static const char* map[] = { |
2802 | [LOG2U(IFF_UP)] = "up", /* interface is up. */ | |
0b75493d | 2803 | [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid. */ |
19aa7eeb ZJS |
2804 | [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */ |
2805 | [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */ | |
2806 | [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */ | |
2807 | [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */ | |
2808 | [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */ | |
2809 | [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */ | |
2810 | [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */ | |
2811 | [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */ | |
2812 | [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */ | |
2813 | [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */ | |
0b75493d | 2814 | [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast. */ |
19aa7eeb ZJS |
2815 | [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */ |
2816 | [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */ | |
2817 | [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */ | |
2818 | [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */ | |
2819 | [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */ | |
2820 | [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */ | |
7ae55b78 YW |
2821 | }; |
2822 | ||
2823 | assert(ret); | |
2824 | ||
2825 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
19aa7eeb ZJS |
2826 | if (FLAGS_SET(flags, 1 << i) && map[i]) |
2827 | if (!strextend_with_separator(&str, ",", map[i])) | |
2828 | return -ENOMEM; | |
7ae55b78 YW |
2829 | |
2830 | *ret = TAKE_PTR(str); | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | static const char * const kernel_operstate_table[] = { | |
2835 | [IF_OPER_UNKNOWN] = "unknown", | |
2836 | [IF_OPER_NOTPRESENT] = "not-present", | |
2837 | [IF_OPER_DOWN] = "down", | |
2838 | [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down", | |
2839 | [IF_OPER_TESTING] = "testing", | |
2840 | [IF_OPER_DORMANT] = "dormant", | |
2841 | [IF_OPER_UP] = "up", | |
2842 | }; | |
2843 | ||
2844 | DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int); |