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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
f579559b | 2 | |
176b8be1 | 3 | #include <net/if.h> |
9aa5d8ba | 4 | #include <netinet/in.h> |
f579559b | 5 | #include <linux/if.h> |
8f815e8b | 6 | #include <linux/if_arp.h> |
518cd6b5 | 7 | #include <linux/if_link.h> |
2a0d07d6 | 8 | #include <linux/netdevice.h> |
8430841b | 9 | #include <sys/socket.h> |
4cc7a82c | 10 | #include <unistd.h> |
f579559b | 11 | |
b5efdb8a | 12 | #include "alloc-util.h" |
8a77e245 | 13 | #include "arphrd-util.h" |
c0267a59 | 14 | #include "batadv.h" |
737f1405 YW |
15 | #include "bond.h" |
16 | #include "bridge.h" | |
1346b1f0 | 17 | #include "bus-util.h" |
3be9d62a YW |
18 | #include "device-private.h" |
19 | #include "device-util.h" | |
27dfc982 | 20 | #include "dhcp-identifier.h" |
bd91b83e | 21 | #include "dhcp-lease-internal.h" |
686d13b9 | 22 | #include "env-file.h" |
4bb7cc82 | 23 | #include "ethtool-util.h" |
6706ce2f | 24 | #include "event-util.h" |
3ffd4af2 | 25 | #include "fd-util.h" |
cf1d700d | 26 | #include "fileio.h" |
176b8be1 | 27 | #include "format-util.h" |
af664001 | 28 | #include "fs-util.h" |
e2341b6b | 29 | #include "glyph-util.h" |
ef118d00 | 30 | #include "missing_network.h" |
cf1d700d | 31 | #include "netlink-util.h" |
c6f7c917 | 32 | #include "network-internal.h" |
fb486c90 | 33 | #include "networkd-address-label.h" |
093e3533 | 34 | #include "networkd-address.h" |
9671ae9d | 35 | #include "networkd-bridge-fdb.h" |
ff9e0783 | 36 | #include "networkd-bridge-mdb.h" |
3ddcbeea | 37 | #include "networkd-can.h" |
d5ebcf65 | 38 | #include "networkd-dhcp-prefix-delegation.h" |
8fcf1d61 | 39 | #include "networkd-dhcp-server.h" |
ca5ad760 YW |
40 | #include "networkd-dhcp4.h" |
41 | #include "networkd-dhcp6.h" | |
76a86ffd | 42 | #include "networkd-ipv4acd.h" |
ca5ad760 | 43 | #include "networkd-ipv4ll.h" |
76c5a0f2 | 44 | #include "networkd-ipv6-proxy-ndp.h" |
6a1af3d4 YW |
45 | #include "networkd-link-bus.h" |
46 | #include "networkd-link.h" | |
8e1ad1ea | 47 | #include "networkd-lldp-tx.h" |
23f53b99 | 48 | #include "networkd-manager.h" |
1e7a0e21 | 49 | #include "networkd-ndisc.h" |
e4a71bf3 | 50 | #include "networkd-neighbor.h" |
75156ccb | 51 | #include "networkd-nexthop.h" |
19d9a5ad | 52 | #include "networkd-queue.h" |
7465dd22 | 53 | #include "networkd-radv.h" |
3b6a3bde | 54 | #include "networkd-route.h" |
bce67bbe | 55 | #include "networkd-routing-policy-rule.h" |
0fa8ee6c | 56 | #include "networkd-setlink.h" |
19d9a5ad | 57 | #include "networkd-sriov.h" |
3b5a4fc6 | 58 | #include "networkd-state-file.h" |
19d9a5ad | 59 | #include "networkd-sysctl.h" |
cf1d700d TG |
60 | #include "set.h" |
61 | #include "socket-util.h" | |
15a5e950 | 62 | #include "stdio-util.h" |
8b43440b | 63 | #include "string-table.h" |
51517f9e | 64 | #include "strv.h" |
34658df2 | 65 | #include "tc.h" |
e4de7287 | 66 | #include "tmpfile-util.h" |
af7a86b8 | 67 | #include "tuntap.h" |
299ad32d | 68 | #include "udev-util.h" |
cf1d700d | 69 | #include "util.h" |
737f1405 | 70 | #include "vrf.h" |
fc2f9534 | 71 | |
5e0534f1 | 72 | bool link_ipv6_enabled(Link *link) { |
439689c6 SS |
73 | assert(link); |
74 | ||
75 | if (!socket_ipv6_is_supported()) | |
76 | return false; | |
77 | ||
5fb5fae9 | 78 | if (link->iftype == ARPHRD_CAN) |
2b00a4e0 TY |
79 | return false; |
80 | ||
5fb5fae9 YW |
81 | if (!link->network) |
82 | return false; | |
83 | ||
84 | if (link->network->bond) | |
af9ba57a YW |
85 | return false; |
86 | ||
bd7e0a3f | 87 | if (link_may_have_ipv6ll(link, /* check_multicast = */ false)) |
adfeee49 YW |
88 | return true; |
89 | ||
90 | if (network_has_static_ipv6_configurations(link->network)) | |
91 | return true; | |
92 | ||
93 | return false; | |
439689c6 SS |
94 | } |
95 | ||
e33232d4 | 96 | static bool link_is_ready_to_configure_one(Link *link, bool allow_unmanaged) { |
7191a57a YW |
97 | assert(link); |
98 | ||
d8d4db58 YW |
99 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) |
100 | return false; | |
101 | ||
2fd3908b YW |
102 | if (!link->network) |
103 | return allow_unmanaged; | |
7191a57a | 104 | |
baa95d22 YW |
105 | if (!link->network->configure_without_carrier) { |
106 | if (link->set_flags_messages > 0) | |
107 | return false; | |
108 | ||
109 | if (!link_has_carrier(link)) | |
110 | return false; | |
111 | } | |
7191a57a | 112 | |
0fa8ee6c YW |
113 | if (link->set_link_messages > 0) |
114 | return false; | |
115 | ||
112a0972 YW |
116 | if (!link->activated) |
117 | return false; | |
112a0972 | 118 | |
7191a57a YW |
119 | return true; |
120 | } | |
121 | ||
e33232d4 YW |
122 | bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
123 | return check_ready_for_all_sr_iov_ports(link, allow_unmanaged, link_is_ready_to_configure_one); | |
124 | } | |
125 | ||
15761549 YW |
126 | void link_ntp_settings_clear(Link *link) { |
127 | link->ntp = strv_free(link->ntp); | |
128 | } | |
129 | ||
130 | void link_dns_settings_clear(Link *link) { | |
f5fbe71d | 131 | if (link->n_dns != UINT_MAX) |
e77bd3fd YW |
132 | for (unsigned i = 0; i < link->n_dns; i++) |
133 | in_addr_full_free(link->dns[i]); | |
15761549 | 134 | link->dns = mfree(link->dns); |
f5fbe71d | 135 | link->n_dns = UINT_MAX; |
15761549 | 136 | |
6e4571f0 YW |
137 | link->search_domains = ordered_set_free(link->search_domains); |
138 | link->route_domains = ordered_set_free(link->route_domains); | |
15761549 YW |
139 | |
140 | link->dns_default_route = -1; | |
141 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
142 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
143 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
144 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
145 | ||
146 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
147 | } | |
148 | ||
1a6bb31f YW |
149 | static void link_free_engines(Link *link) { |
150 | if (!link) | |
151 | return; | |
152 | ||
153 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
154 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); | |
155 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
e49bad01 | 156 | link->dhcp4_6rd_tunnel_name = mfree(link->dhcp4_6rd_tunnel_name); |
1a6bb31f | 157 | |
35778343 | 158 | link->lldp_rx = sd_lldp_rx_unref(link->lldp_rx); |
c01b9b87 | 159 | link->lldp_tx = sd_lldp_tx_unref(link->lldp_tx); |
1a6bb31f YW |
160 | |
161 | ndisc_flush(link); | |
162 | ||
163 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); | |
164 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
1633c457 | 165 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
1a6bb31f YW |
166 | link->ndisc = sd_ndisc_unref(link->ndisc); |
167 | link->radv = sd_radv_unref(link->radv); | |
168 | } | |
169 | ||
8301aa0b | 170 | static Link *link_free(Link *link) { |
8301aa0b | 171 | assert(link); |
f579559b | 172 | |
15761549 YW |
173 | link_ntp_settings_clear(link); |
174 | link_dns_settings_clear(link); | |
175 | ||
8eec0b9d | 176 | link->routes = set_free(link->routes); |
8eec0b9d | 177 | link->nexthops = set_free(link->nexthops); |
8eec0b9d | 178 | link->neighbors = set_free(link->neighbors); |
8eec0b9d | 179 | link->addresses = set_free(link->addresses); |
3a67b8bb YW |
180 | link->qdiscs = set_free(link->qdiscs); |
181 | link->tclasses = set_free(link->tclasses); | |
adda1ed9 | 182 | |
a27588d4 | 183 | link->dhcp_pd_prefixes = set_free(link->dhcp_pd_prefixes); |
4b409e85 | 184 | |
1a6bb31f | 185 | link_free_engines(link); |
49699bac | 186 | |
b0ff6dea | 187 | set_free(link->sr_iov_virt_port_ifindices); |
c166a070 | 188 | free(link->ifname); |
572b21d9 | 189 | strv_free(link->alternative_names); |
ceac4078 | 190 | free(link->kind); |
8d968fdd | 191 | free(link->ssid); |
6706ce2f | 192 | free(link->previous_ssid); |
c643bda5 | 193 | free(link->driver); |
6cad256d | 194 | |
a34e58d4 YW |
195 | unlink_and_free(link->lease_file); |
196 | unlink_and_free(link->lldp_file); | |
197 | unlink_and_free(link->state_file); | |
c166a070 | 198 | |
8de56fb3 | 199 | sd_device_unref(link->dev); |
9aa2585e | 200 | netdev_unref(link->netdev); |
b5db00e5 | 201 | |
0d4ad91d | 202 | hashmap_free(link->bound_to_links); |
0d4ad91d AR |
203 | hashmap_free(link->bound_by_links); |
204 | ||
5f707e12 | 205 | set_free_with_destructor(link->slaves, link_unref); |
033295c1 | 206 | |
c9c908a6 YW |
207 | network_unref(link->network); |
208 | ||
6706ce2f YW |
209 | sd_event_source_disable_unref(link->carrier_lost_timer); |
210 | ||
8301aa0b | 211 | return mfree(link); |
14b746f7 TG |
212 | } |
213 | ||
8301aa0b | 214 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
14b746f7 | 215 | |
6eab614d | 216 | int link_get_by_index(Manager *m, int ifindex, Link **ret) { |
11a7f229 | 217 | Link *link; |
11a7f229 TG |
218 | |
219 | assert(m); | |
e856ed00 | 220 | assert(ifindex > 0); |
11a7f229 | 221 | |
6eab614d | 222 | link = hashmap_get(m->links_by_index, INT_TO_PTR(ifindex)); |
11a7f229 TG |
223 | if (!link) |
224 | return -ENODEV; | |
225 | ||
0b54c870 YW |
226 | if (ret) |
227 | *ret = link; | |
228 | return 0; | |
229 | } | |
230 | ||
231 | int link_get_by_name(Manager *m, const char *ifname, Link **ret) { | |
232 | Link *link; | |
233 | ||
234 | assert(m); | |
235 | assert(ifname); | |
11a7f229 | 236 | |
0b54c870 YW |
237 | link = hashmap_get(m->links_by_name, ifname); |
238 | if (!link) | |
239 | return -ENODEV; | |
240 | ||
241 | if (ret) | |
242 | *ret = link; | |
11a7f229 TG |
243 | return 0; |
244 | } | |
245 | ||
fe321d45 YW |
246 | int link_get_by_hw_addr(Manager *m, const struct hw_addr_data *hw_addr, Link **ret) { |
247 | Link *link; | |
248 | ||
249 | assert(m); | |
250 | assert(hw_addr); | |
251 | ||
252 | link = hashmap_get(m->links_by_hw_addr, hw_addr); | |
253 | if (!link) | |
254 | return -ENODEV; | |
255 | ||
256 | if (ret) | |
257 | *ret = link; | |
258 | return 0; | |
259 | } | |
260 | ||
81357285 YW |
261 | int link_get_master(Link *link, Link **ret) { |
262 | assert(link); | |
263 | assert(link->manager); | |
264 | assert(ret); | |
265 | ||
266 | if (link->master_ifindex <= 0 || link->master_ifindex == link->ifindex) | |
267 | return -ENODEV; | |
268 | ||
6eab614d | 269 | return link_get_by_index(link->manager, link->master_ifindex, ret); |
81357285 YW |
270 | } |
271 | ||
af9ba57a | 272 | void link_set_state(Link *link, LinkState state) { |
e331e246 TG |
273 | assert(link); |
274 | ||
275 | if (link->state == state) | |
276 | return; | |
277 | ||
0beb9542 YW |
278 | log_link_debug(link, "State changed: %s -> %s", |
279 | link_state_to_string(link->state), | |
280 | link_state_to_string(state)); | |
281 | ||
e331e246 TG |
282 | link->state = state; |
283 | ||
284 | link_send_changed(link, "AdministrativeState", NULL); | |
9092113d | 285 | link_dirty(link); |
e331e246 TG |
286 | } |
287 | ||
2a99eed0 | 288 | int link_stop_engines(Link *link, bool may_keep_dhcp) { |
111bb8f9 TG |
289 | int r = 0, k; |
290 | ||
291 | assert(link); | |
292 | assert(link->manager); | |
293 | assert(link->manager->event); | |
294 | ||
80060352 ZJS |
295 | bool keep_dhcp = may_keep_dhcp && |
296 | link->network && | |
76a86ffd | 297 | !link->network->dhcp_send_decline && /* IPv4 ACD for the DHCPv4 address is running. */ |
80060352 ZJS |
298 | (link->manager->restarting || |
299 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
300 | ||
84add3cd | 301 | if (!keep_dhcp) { |
111bb8f9 | 302 | k = sd_dhcp_client_stop(link->dhcp_client); |
6a7a4e4d | 303 | if (k < 0) |
36c7d709 | 304 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
111bb8f9 TG |
305 | } |
306 | ||
2a99eed0 YW |
307 | k = sd_dhcp_server_stop(link->dhcp_server); |
308 | if (k < 0) | |
309 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); | |
310 | ||
35778343 | 311 | k = sd_lldp_rx_stop(link->lldp_rx); |
9cc65242 | 312 | if (k < 0) |
c01b9b87 YW |
313 | r = log_link_warning_errno(link, k, "Could not stop LLDP Rx: %m"); |
314 | ||
315 | k = sd_lldp_tx_stop(link->lldp_tx); | |
316 | if (k < 0) | |
317 | r = log_link_warning_errno(link, k, "Could not stop LLDP Tx: %m"); | |
9cc65242 | 318 | |
84add3cd YW |
319 | k = sd_ipv4ll_stop(link->ipv4ll); |
320 | if (k < 0) | |
321 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
dd43110f | 322 | |
76a86ffd | 323 | k = ipv4acd_stop(link); |
2488e4d9 YW |
324 | if (k < 0) |
325 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); | |
051e77ca | 326 | |
84add3cd YW |
327 | k = sd_dhcp6_client_stop(link->dhcp6_client); |
328 | if (k < 0) | |
329 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
4138fb2c | 330 | |
a27588d4 | 331 | k = dhcp_pd_remove(link, /* only_marked = */ false); |
2ffd6d73 YW |
332 | if (k < 0) |
333 | r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); | |
1633c457 | 334 | |
77302468 | 335 | k = ndisc_stop(link); |
84add3cd YW |
336 | if (k < 0) |
337 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
4138fb2c | 338 | |
259c65f3 YW |
339 | ndisc_flush(link); |
340 | ||
84add3cd YW |
341 | k = sd_radv_stop(link->radv); |
342 | if (k < 0) | |
343 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
7465dd22 | 344 | |
111bb8f9 TG |
345 | return r; |
346 | } | |
347 | ||
b22d8a00 | 348 | void link_enter_failed(Link *link) { |
ef1ba606 | 349 | assert(link); |
f882c247 | 350 | |
370e9930 | 351 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
352 | return; |
353 | ||
6a7a4e4d | 354 | log_link_warning(link, "Failed"); |
449f7554 | 355 | |
e331e246 | 356 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 357 | |
2a99eed0 | 358 | (void) link_stop_engines(link, false); |
f882c247 TG |
359 | } |
360 | ||
6accfd31 DA |
361 | void link_check_ready(Link *link) { |
362 | Address *a; | |
6accfd31 DA |
363 | |
364 | assert(link); | |
365 | ||
5f58af25 YW |
366 | if (link->state == LINK_STATE_CONFIGURED) |
367 | return; | |
368 | ||
d19b9939 YW |
369 | if (link->state != LINK_STATE_CONFIGURING) |
370 | return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
6accfd31 DA |
371 | |
372 | if (!link->network) | |
a7f07cbe | 373 | return (void) log_link_debug(link, "%s(): link is unmanaged.", __func__); |
6accfd31 | 374 | |
7558f9e7 YW |
375 | if (!link->tc_configured) |
376 | return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
600b7898 | 377 | |
a7f07cbe YW |
378 | if (link->set_link_messages > 0) |
379 | return (void) log_link_debug(link, "%s(): link layer is configuring.", __func__); | |
380 | ||
381 | if (!link->activated) | |
382 | return (void) log_link_debug(link, "%s(): link is not activated.", __func__); | |
383 | ||
7558f9e7 YW |
384 | if (link->iftype == ARPHRD_CAN) { |
385 | /* let's shortcut things for CAN which doesn't need most of checks below. */ | |
386 | link_set_state(link, LINK_STATE_CONFIGURED); | |
387 | return; | |
388 | } | |
389 | ||
879377ca YW |
390 | if (!link->stacked_netdevs_created) |
391 | return (void) log_link_debug(link, "%s(): stacked netdevs are not created.", __func__); | |
392 | ||
76c5a0f2 | 393 | if (!link->static_addresses_configured) |
d19b9939 | 394 | return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
6accfd31 | 395 | |
90e74a66 | 396 | SET_FOREACH(a, link->addresses) |
c71384a9 ZJS |
397 | if (!address_is_ready(a)) |
398 | return (void) log_link_debug(link, "%s(): address %s is not ready.", __func__, | |
399 | IN_ADDR_PREFIX_TO_STRING(a->family, &a->in_addr, a->prefixlen)); | |
6aa5773b | 400 | |
354bc760 YW |
401 | if (!link->static_address_labels_configured) |
402 | return (void) log_link_debug(link, "%s(): static address labels are not configured.", __func__); | |
403 | ||
e5b35bf6 YW |
404 | if (!link->static_bridge_fdb_configured) |
405 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
406 | ||
ff9e0783 YW |
407 | if (!link->static_bridge_mdb_configured) |
408 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
409 | ||
fdeba3f5 YW |
410 | if (!link->static_ipv6_proxy_ndp_configured) |
411 | return (void) log_link_debug(link, "%s(): static IPv6 proxy NDP addresses are not configured.", __func__); | |
412 | ||
40ca350e YW |
413 | if (!link->static_neighbors_configured) |
414 | return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
415 | ||
d19b9939 YW |
416 | if (!link->static_nexthops_configured) |
417 | return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
c16c7808 | 418 | |
76c5a0f2 YW |
419 | if (!link->static_routes_configured) |
420 | return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
421 | ||
0e5ef6be | 422 | if (!link->static_routing_policy_rules_configured) |
d19b9939 | 423 | return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
6accfd31 | 424 | |
d19b9939 YW |
425 | if (!link->sr_iov_configured) |
426 | return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
518cd6b5 | 427 | |
4bcb8625 YW |
428 | /* IPv6LL is assigned after the link gains its carrier. */ |
429 | if (!link->network->configure_without_carrier && | |
430 | link_ipv6ll_enabled(link) && | |
431 | !in6_addr_is_set(&link->ipv6ll_address)) | |
432 | return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); | |
433 | ||
3b6a3bde YW |
434 | bool has_dynamic_address = false; |
435 | SET_FOREACH(a, link->addresses) { | |
436 | if (address_is_marked(a)) | |
437 | continue; | |
438 | if (!address_exists(a)) | |
439 | continue; | |
440 | if (IN_SET(a->source, | |
d9098371 YW |
441 | NETWORK_CONFIG_SOURCE_IPV4LL, |
442 | NETWORK_CONFIG_SOURCE_DHCP4, | |
443 | NETWORK_CONFIG_SOURCE_DHCP6, | |
a27588d4 | 444 | NETWORK_CONFIG_SOURCE_DHCP_PD, |
d9098371 | 445 | NETWORK_CONFIG_SOURCE_NDISC)) { |
3b6a3bde | 446 | has_dynamic_address = true; |
4bcb8625 YW |
447 | break; |
448 | } | |
3b6a3bde | 449 | } |
50550722 | 450 | |
3b6a3bde | 451 | if ((link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || |
a27588d4 | 452 | (link_dhcp_pd_is_enabled(link) && link->network->dhcp_pd_assign)) && !has_dynamic_address) |
4bcb8625 | 453 | /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ |
a27588d4 | 454 | return (void) log_link_debug(link, "%s(): DHCPv4, DHCPv6, DHCP-PD or IPv4LL is enabled but no dynamic address is assigned yet.", __func__); |
4bcb8625 YW |
455 | |
456 | /* Ignore NDisc when ConfigureWithoutCarrier= is enabled, as IPv6AcceptRA= is enabled by default. */ | |
3b6a3bde | 457 | if (link_ipv4ll_enabled(link) || link_dhcp4_enabled(link) || |
a27588d4 | 458 | link_dhcp6_enabled(link) || link_dhcp_pd_is_enabled(link) || |
3b6a3bde YW |
459 | (!link->network->configure_without_carrier && link_ipv6_accept_ra_enabled(link))) { |
460 | ||
461 | if (!link->ipv4ll_address_configured && !link->dhcp4_configured && | |
a27588d4 | 462 | !link->dhcp6_configured && !link->dhcp_pd_configured && !link->ndisc_configured) |
4bcb8625 YW |
463 | /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */ |
464 | return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); | |
465 | ||
a27588d4 | 466 | log_link_debug(link, "%s(): IPv4LL:%s DHCPv4:%s DHCPv6:%s DHCP-PD:%s NDisc:%s", |
4bcb8625 | 467 | __func__, |
4bcb8625 | 468 | yes_no(link->ipv4ll_address_configured), |
3b6a3bde YW |
469 | yes_no(link->dhcp4_configured), |
470 | yes_no(link->dhcp6_configured), | |
a27588d4 | 471 | yes_no(link->dhcp_pd_configured), |
3b6a3bde | 472 | yes_no(link->ndisc_configured)); |
463797c1 | 473 | } |
6accfd31 | 474 | |
29836c16 | 475 | link_set_state(link, LINK_STATE_CONFIGURED); |
6accfd31 DA |
476 | } |
477 | ||
97108953 | 478 | static int link_request_static_configs(Link *link) { |
f882c247 TG |
479 | int r; |
480 | ||
481 | assert(link); | |
482 | assert(link->network); | |
f5be5601 | 483 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 484 | |
354bc760 | 485 | r = link_request_static_addresses(link); |
0e5ef6be YW |
486 | if (r < 0) |
487 | return r; | |
488 | ||
354bc760 | 489 | r = link_request_static_address_labels(link); |
f3ef324d YW |
490 | if (r < 0) |
491 | return r; | |
e4a71bf3 | 492 | |
e5b35bf6 YW |
493 | r = link_request_static_bridge_fdb(link); |
494 | if (r < 0) | |
495 | return r; | |
496 | ||
9a038aac YW |
497 | r = link_request_static_bridge_mdb(link); |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
fdeba3f5 YW |
501 | r = link_request_static_ipv6_proxy_ndp_addresses(link); |
502 | if (r < 0) | |
503 | return r; | |
504 | ||
40ca350e | 505 | r = link_request_static_neighbors(link); |
682c65b0 YW |
506 | if (r < 0) |
507 | return r; | |
bd6379ec | 508 | |
76c5a0f2 | 509 | r = link_request_static_nexthops(link, false); |
fe2bc17c YW |
510 | if (r < 0) |
511 | return r; | |
f882c247 | 512 | |
76c5a0f2 YW |
513 | r = link_request_static_routes(link, false); |
514 | if (r < 0) | |
515 | return r; | |
516 | ||
517 | r = link_request_static_routing_policy_rules(link); | |
5ae0fb7f YW |
518 | if (r < 0) |
519 | return r; | |
d4cdbea5 | 520 | |
f882c247 TG |
521 | return 0; |
522 | } | |
523 | ||
1187fc33 YW |
524 | static int link_request_stacked_netdevs(Link *link) { |
525 | NetDev *netdev; | |
e16e4b3b DS |
526 | int r; |
527 | ||
528 | assert(link); | |
529 | ||
1187fc33 | 530 | link->stacked_netdevs_created = false; |
e16e4b3b | 531 | |
1187fc33 | 532 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
b14686ff | 533 | r = link_request_stacked_netdev(link, netdev); |
1187fc33 YW |
534 | if (r < 0) |
535 | return r; | |
536 | } | |
e16e4b3b | 537 | |
bb916f35 | 538 | if (link->create_stacked_netdev_messages == 0) { |
1187fc33 | 539 | link->stacked_netdevs_created = true; |
bb916f35 YW |
540 | link_check_ready(link); |
541 | } | |
e16e4b3b DS |
542 | |
543 | return 0; | |
544 | } | |
545 | ||
8566df79 | 546 | static int link_acquire_dynamic_ipv6_conf(Link *link) { |
e7ab854c TG |
547 | int r; |
548 | ||
549 | assert(link); | |
550 | ||
0f96a823 YW |
551 | r = radv_start(link); |
552 | if (r < 0) | |
553 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Advertisement engine: %m"); | |
7465dd22 | 554 | |
294f129b YW |
555 | r = ndisc_start(link); |
556 | if (r < 0) | |
557 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
cd305af1 | 558 | |
294f129b YW |
559 | r = dhcp6_start(link); |
560 | if (r < 0) | |
561 | return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); | |
cd305af1 | 562 | |
e7ab854c TG |
563 | return 0; |
564 | } | |
565 | ||
8566df79 | 566 | static int link_acquire_dynamic_ipv4_conf(Link *link) { |
ff254138 TG |
567 | int r; |
568 | ||
569 | assert(link); | |
ff254138 TG |
570 | assert(link->manager); |
571 | assert(link->manager->event); | |
572 | ||
0107b769 | 573 | if (link->dhcp_client) { |
294f129b | 574 | r = dhcp4_start(link); |
0107b769 | 575 | if (r < 0) |
294f129b | 576 | return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
0107b769 | 577 | |
ccffa166 | 578 | log_link_debug(link, "Acquiring DHCPv4 lease."); |
5c1d3fc9 | 579 | |
ccffa166 | 580 | } else if (link->ipv4ll) { |
59c27231 AK |
581 | if (in4_addr_is_set(&link->network->ipv4ll_start_address)) { |
582 | r = sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address); | |
583 | if (r < 0) | |
584 | return log_link_warning_errno(link, r, "Could not set IPv4 link-local start address: %m"); | |
585 | } | |
586 | ||
5c1d3fc9 | 587 | r = sd_ipv4ll_start(link->ipv4ll); |
6a7a4e4d LP |
588 | if (r < 0) |
589 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
ccffa166 YW |
590 | |
591 | log_link_debug(link, "Acquiring IPv4 link-local address."); | |
5c1d3fc9 UTL |
592 | } |
593 | ||
ab486ef4 YW |
594 | if (link->dhcp_server) { |
595 | r = sd_dhcp_server_start(link->dhcp_server); | |
596 | if (r < 0) | |
597 | return log_link_warning_errno(link, r, "Could not start DHCP server: %m"); | |
598 | } | |
599 | ||
76a86ffd YW |
600 | r = ipv4acd_start(link); |
601 | if (r < 0) | |
602 | return log_link_warning_errno(link, r, "Could not start IPv4 ACD client: %m"); | |
603 | ||
6fc25497 SS |
604 | return 0; |
605 | } | |
606 | ||
8566df79 | 607 | static int link_acquire_dynamic_conf(Link *link) { |
6fc25497 SS |
608 | int r; |
609 | ||
610 | assert(link); | |
0f96a823 | 611 | assert(link->network); |
6fc25497 | 612 | |
8566df79 | 613 | r = link_acquire_dynamic_ipv4_conf(link); |
6fc25497 SS |
614 | if (r < 0) |
615 | return r; | |
616 | ||
94876904 | 617 | if (in6_addr_is_set(&link->ipv6ll_address)) { |
8566df79 | 618 | r = link_acquire_dynamic_ipv6_conf(link); |
6fc25497 SS |
619 | if (r < 0) |
620 | return r; | |
621 | } | |
622 | ||
a27588d4 | 623 | if (!link_radv_enabled(link) || !link->network->dhcp_pd_announce) { |
0f96a823 YW |
624 | /* DHCPv6PD downstream does not require IPv6LL address. But may require RADV to be |
625 | * configured, and RADV may not be configured yet here. Only acquire subnet prefix when | |
626 | * RADV is disabled, or the announcement of the prefix is disabled. Otherwise, the | |
627 | * below will be called in radv_start(). */ | |
a27588d4 | 628 | r = dhcp_request_prefix_delegation(link); |
0f96a823 | 629 | if (r < 0) |
a27588d4 | 630 | return log_link_warning_errno(link, r, "Failed to request DHCP delegated subnet prefix: %m"); |
0f96a823 YW |
631 | } |
632 | ||
c01b9b87 YW |
633 | if (link->lldp_tx) { |
634 | r = sd_lldp_tx_start(link->lldp_tx); | |
635 | if (r < 0) | |
636 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
637 | } | |
8e1ad1ea | 638 | |
35778343 YW |
639 | if (link->lldp_rx) { |
640 | r = sd_lldp_rx_start(link->lldp_rx); | |
f8549910 YW |
641 | if (r < 0) |
642 | return log_link_warning_errno(link, r, "Failed to start LLDP client: %m"); | |
643 | } | |
644 | ||
ff254138 TG |
645 | return 0; |
646 | } | |
647 | ||
7657ec3e | 648 | int link_ipv6ll_gained(Link *link) { |
0c9ee5d5 | 649 | int r; |
deb2e523 | 650 | |
0c9ee5d5 | 651 | assert(link); |
deb2e523 | 652 | |
0c9ee5d5 | 653 | log_link_info(link, "Gained IPv6LL"); |
deb2e523 | 654 | |
7657ec3e YW |
655 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) |
656 | return 0; | |
0c9ee5d5 | 657 | |
7657ec3e YW |
658 | r = link_acquire_dynamic_ipv6_conf(link); |
659 | if (r < 0) | |
660 | return r; | |
0c9ee5d5 | 661 | |
7657ec3e | 662 | link_check_ready(link); |
0c9ee5d5 | 663 | return 0; |
deb2e523 TG |
664 | } |
665 | ||
112a0972 | 666 | int link_handle_bound_to_list(Link *link) { |
0d4ad91d AR |
667 | bool required_up = false; |
668 | bool link_is_up = false; | |
852a3916 | 669 | Link *l; |
0d4ad91d AR |
670 | |
671 | assert(link); | |
672 | ||
ad82f0c3 YW |
673 | /* If at least one interface in bound_to_links has carrier, then make this interface up. |
674 | * If all interfaces in bound_to_links do not, then make this interface down. */ | |
675 | ||
0d4ad91d AR |
676 | if (hashmap_isempty(link->bound_to_links)) |
677 | return 0; | |
678 | ||
679 | if (link->flags & IFF_UP) | |
680 | link_is_up = true; | |
681 | ||
852a3916 | 682 | HASHMAP_FOREACH(l, link->bound_to_links) |
0d4ad91d AR |
683 | if (link_has_carrier(l)) { |
684 | required_up = true; | |
685 | break; | |
686 | } | |
687 | ||
852a3916 | 688 | if (!required_up && link_is_up) |
68f52063 | 689 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
852a3916 | 690 | if (required_up && !link_is_up) |
68f52063 | 691 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0d4ad91d AR |
692 | |
693 | return 0; | |
694 | } | |
695 | ||
696 | static int link_handle_bound_by_list(Link *link) { | |
0d4ad91d AR |
697 | Link *l; |
698 | int r; | |
699 | ||
700 | assert(link); | |
701 | ||
ad82f0c3 YW |
702 | /* Update up or down state of interfaces which depend on this interface's carrier state. */ |
703 | ||
0d4ad91d AR |
704 | if (hashmap_isempty(link->bound_by_links)) |
705 | return 0; | |
706 | ||
852a3916 | 707 | HASHMAP_FOREACH(l, link->bound_by_links) { |
0d4ad91d AR |
708 | r = link_handle_bound_to_list(l); |
709 | if (r < 0) | |
710 | return r; | |
711 | } | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
717 | int r; | |
718 | ||
719 | assert(link); | |
720 | assert(carrier); | |
721 | ||
722 | if (link == carrier) | |
723 | return 0; | |
724 | ||
725 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
726 | return 0; | |
727 | ||
190b3b5c | 728 | r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
0d4ad91d AR |
729 | if (r < 0) |
730 | return r; | |
731 | ||
9092113d YW |
732 | link_dirty(link); |
733 | ||
0d4ad91d AR |
734 | return 0; |
735 | } | |
736 | ||
737 | static int link_new_bound_by_list(Link *link) { | |
738 | Manager *m; | |
739 | Link *carrier; | |
0d4ad91d | 740 | int r; |
0d4ad91d AR |
741 | |
742 | assert(link); | |
743 | assert(link->manager); | |
744 | ||
745 | m = link->manager; | |
746 | ||
6eab614d | 747 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
0d4ad91d AR |
748 | if (!carrier->network) |
749 | continue; | |
750 | ||
751 | if (strv_isempty(carrier->network->bind_carrier)) | |
752 | continue; | |
753 | ||
191a3f16 | 754 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
0d4ad91d AR |
755 | r = link_put_carrier(link, carrier, &link->bound_by_links); |
756 | if (r < 0) | |
757 | return r; | |
0d4ad91d AR |
758 | } |
759 | } | |
760 | ||
90e74a66 | 761 | HASHMAP_FOREACH(carrier, link->bound_by_links) { |
0d4ad91d AR |
762 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
763 | if (r < 0) | |
764 | return r; | |
0d4ad91d AR |
765 | } |
766 | ||
767 | return 0; | |
768 | } | |
769 | ||
770 | static int link_new_bound_to_list(Link *link) { | |
771 | Manager *m; | |
772 | Link *carrier; | |
0d4ad91d | 773 | int r; |
0d4ad91d AR |
774 | |
775 | assert(link); | |
776 | assert(link->manager); | |
777 | ||
778 | if (!link->network) | |
779 | return 0; | |
780 | ||
781 | if (strv_isempty(link->network->bind_carrier)) | |
782 | return 0; | |
783 | ||
784 | m = link->manager; | |
785 | ||
6eab614d | 786 | HASHMAP_FOREACH(carrier, m->links_by_index) { |
191a3f16 | 787 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
0d4ad91d AR |
788 | r = link_put_carrier(link, carrier, &link->bound_to_links); |
789 | if (r < 0) | |
790 | return r; | |
0d4ad91d AR |
791 | } |
792 | } | |
793 | ||
852a3916 | 794 | HASHMAP_FOREACH(carrier, link->bound_to_links) { |
0d4ad91d AR |
795 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
796 | if (r < 0) | |
797 | return r; | |
0d4ad91d AR |
798 | } |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
0d4ad91d | 803 | static void link_free_bound_to_list(Link *link) { |
9092113d | 804 | bool updated = false; |
0d4ad91d | 805 | Link *bound_to; |
0d4ad91d | 806 | |
9092113d YW |
807 | assert(link); |
808 | ||
809 | while ((bound_to = hashmap_steal_first(link->bound_to_links))) { | |
810 | updated = true; | |
0d4ad91d AR |
811 | |
812 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
84de38c5 | 813 | link_dirty(bound_to); |
0d4ad91d AR |
814 | } |
815 | ||
9092113d YW |
816 | if (updated) |
817 | link_dirty(link); | |
0d4ad91d AR |
818 | } |
819 | ||
820 | static void link_free_bound_by_list(Link *link) { | |
9092113d | 821 | bool updated = false; |
0d4ad91d | 822 | Link *bound_by; |
0d4ad91d | 823 | |
9092113d YW |
824 | assert(link); |
825 | ||
826 | while ((bound_by = hashmap_steal_first(link->bound_by_links))) { | |
827 | updated = true; | |
0d4ad91d AR |
828 | |
829 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
84de38c5 | 830 | link_dirty(bound_by); |
0d4ad91d AR |
831 | link_handle_bound_to_list(bound_by); |
832 | } | |
833 | } | |
834 | ||
9092113d YW |
835 | if (updated) |
836 | link_dirty(link); | |
0d4ad91d AR |
837 | } |
838 | ||
81357285 | 839 | static int link_append_to_master(Link *link) { |
5f707e12 YW |
840 | Link *master; |
841 | int r; | |
842 | ||
843 | assert(link); | |
5f707e12 | 844 | |
81357285 YW |
845 | /* - The link may have no master. |
846 | * - RTM_NEWLINK message about master interface may not be received yet. */ | |
847 | if (link_get_master(link, &master) < 0) | |
848 | return 0; | |
5f707e12 | 849 | |
de7fef4b | 850 | r = set_ensure_put(&master->slaves, NULL, link); |
38288f0b | 851 | if (r <= 0) |
5f707e12 YW |
852 | return r; |
853 | ||
854 | link_ref(link); | |
855 | return 0; | |
856 | } | |
857 | ||
81357285 | 858 | static void link_drop_from_master(Link *link) { |
5f707e12 YW |
859 | Link *master; |
860 | ||
861 | assert(link); | |
862 | ||
81357285 | 863 | if (!link->manager) |
5f707e12 YW |
864 | return; |
865 | ||
81357285 | 866 | if (link_get_master(link, &master) < 0) |
5f707e12 YW |
867 | return; |
868 | ||
869 | link_unref(set_remove(master->slaves, link)); | |
870 | } | |
871 | ||
56001f02 YW |
872 | static void link_drop_requests(Link *link) { |
873 | Request *req; | |
874 | ||
875 | assert(link); | |
876 | assert(link->manager); | |
877 | ||
878 | ORDERED_SET_FOREACH(req, link->manager->request_queue) | |
879 | if (req->link == link) | |
e26d3d40 | 880 | request_detach(link->manager, req); |
56001f02 YW |
881 | } |
882 | ||
cc2d7efc | 883 | static Link *link_drop(Link *link) { |
63130eb3 | 884 | if (!link) |
cc2d7efc | 885 | return NULL; |
0d4ad91d | 886 | |
63130eb3 YW |
887 | assert(link->manager); |
888 | ||
0d4ad91d AR |
889 | link_set_state(link, LINK_STATE_LINGER); |
890 | ||
63130eb3 YW |
891 | /* Drop all references from other links and manager. Note that async netlink calls may have |
892 | * references to the link, and they will be dropped when we receive replies. */ | |
893 | ||
56001f02 YW |
894 | link_drop_requests(link); |
895 | ||
bb193d2d YW |
896 | link_free_bound_to_list(link); |
897 | link_free_bound_by_list(link); | |
0d4ad91d | 898 | |
b0ff6dea YW |
899 | link_clear_sr_iov_ifindices(link); |
900 | ||
81357285 | 901 | link_drop_from_master(link); |
5f707e12 | 902 | |
4c78dc17 YW |
903 | if (link->state_file) |
904 | (void) unlink(link->state_file); | |
905 | ||
63130eb3 YW |
906 | link_clean(link); |
907 | ||
0b54c870 YW |
908 | STRV_FOREACH(n, link->alternative_names) |
909 | hashmap_remove(link->manager->links_by_name, *n); | |
0b54c870 YW |
910 | hashmap_remove(link->manager->links_by_name, link->ifname); |
911 | ||
fe321d45 | 912 | /* bonding master and its slaves have the same hardware address. */ |
e74f1d07 | 913 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 | 914 | |
63130eb3 | 915 | /* The following must be called at last. */ |
6eab614d | 916 | assert_se(hashmap_remove(link->manager->links_by_index, INT_TO_PTR(link->ifindex)) == link); |
cc2d7efc | 917 | return link_unref(link); |
0d4ad91d AR |
918 | } |
919 | ||
5e5b137a | 920 | static int link_drop_foreign_config(Link *link) { |
0b81225e YW |
921 | int k, r; |
922 | ||
923 | assert(link); | |
924 | assert(link->manager); | |
5e5b137a | 925 | |
5e3bb5da YW |
926 | /* Drop foreign config, but ignore unmanaged, loopback, or critical interfaces. We do not want |
927 | * to remove loopback address or addresses used for root NFS. */ | |
928 | ||
929 | if (IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
930 | return 0; | |
931 | if (FLAGS_SET(link->flags, IFF_LOOPBACK)) | |
932 | return 0; | |
933 | if (link->network->keep_configuration == KEEP_CONFIGURATION_YES) | |
934 | return 0; | |
935 | ||
e36d601c | 936 | r = link_drop_foreign_routes(link); |
5e5b137a | 937 | |
e36d601c | 938 | k = link_drop_foreign_nexthops(link); |
0b81225e YW |
939 | if (k < 0 && r >= 0) |
940 | r = k; | |
941 | ||
e36d601c | 942 | k = link_drop_foreign_addresses(link); |
0b81225e YW |
943 | if (k < 0 && r >= 0) |
944 | r = k; | |
d1bdafd2 | 945 | |
e36d601c | 946 | k = link_drop_foreign_neighbors(link); |
25b82b6e YW |
947 | if (k < 0 && r >= 0) |
948 | r = k; | |
949 | ||
0b81225e YW |
950 | k = manager_drop_foreign_routing_policy_rules(link->manager); |
951 | if (k < 0 && r >= 0) | |
952 | r = k; | |
953 | ||
954 | return r; | |
5e5b137a TG |
955 | } |
956 | ||
a0e99a37 | 957 | static int link_drop_managed_config(Link *link) { |
0b81225e YW |
958 | int k, r; |
959 | ||
960 | assert(link); | |
961 | assert(link->manager); | |
3104883d | 962 | |
a0e99a37 | 963 | r = link_drop_managed_routes(link); |
3104883d | 964 | |
a0e99a37 | 965 | k = link_drop_managed_nexthops(link); |
0b81225e YW |
966 | if (k < 0 && r >= 0) |
967 | r = k; | |
d1bdafd2 | 968 | |
a0e99a37 | 969 | k = link_drop_managed_addresses(link); |
0b81225e YW |
970 | if (k < 0 && r >= 0) |
971 | r = k; | |
972 | ||
a0e99a37 | 973 | k = link_drop_managed_neighbors(link); |
25b82b6e YW |
974 | if (k < 0 && r >= 0) |
975 | r = k; | |
976 | ||
a0e99a37 | 977 | k = link_drop_managed_routing_policy_rules(link); |
0b81225e YW |
978 | if (k < 0 && r >= 0) |
979 | r = k; | |
3104883d | 980 | |
0b81225e | 981 | return r; |
3104883d SS |
982 | } |
983 | ||
b4564f4e YW |
984 | static void link_foreignize_config(Link *link) { |
985 | assert(link); | |
986 | assert(link->manager); | |
987 | ||
988 | link_foreignize_routes(link); | |
989 | link_foreignize_nexthops(link); | |
990 | link_foreignize_addresses(link); | |
991 | link_foreignize_neighbors(link); | |
992 | link_foreignize_routing_policy_rules(link); | |
993 | } | |
994 | ||
c3b94251 | 995 | static int link_configure(Link *link) { |
4ecdcb07 YW |
996 | int r; |
997 | ||
ef1ba606 | 998 | assert(link); |
b22d8a00 | 999 | assert(link->network); |
bd08ce56 | 1000 | assert(link->state == LINK_STATE_INITIALIZED); |
a748b692 | 1001 | |
1187fc33 YW |
1002 | link_set_state(link, LINK_STATE_CONFIGURING); |
1003 | ||
3cf58ef3 YW |
1004 | r = link_new_bound_to_list(link); |
1005 | if (r < 0) | |
1006 | return r; | |
1007 | ||
1dec9d81 | 1008 | r = link_request_traffic_control(link); |
4ecdcb07 YW |
1009 | if (r < 0) |
1010 | return r; | |
1011 | ||
7558f9e7 YW |
1012 | if (link->iftype == ARPHRD_CAN) { |
1013 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
1014 | r = link_request_to_set_can(link); | |
1015 | if (r < 0) | |
1016 | return r; | |
1017 | ||
1018 | return link_request_to_activate(link); | |
1019 | } | |
1020 | ||
cb8453cc | 1021 | r = link_request_sr_iov_vfs(link); |
518cd6b5 SS |
1022 | if (r < 0) |
1023 | return r; | |
1024 | ||
5e0534f1 | 1025 | r = link_set_sysctl(link); |
b69c3180 SS |
1026 | if (r < 0) |
1027 | return r; | |
8749cbcd | 1028 | |
d05c332c | 1029 | r = link_request_to_set_mac(link, /* allow_retry = */ true); |
e16e4b3b DS |
1030 | if (r < 0) |
1031 | return r; | |
1032 | ||
72e65e6f YW |
1033 | r = link_request_to_set_ipoib(link); |
1034 | if (r < 0) | |
1035 | return r; | |
1036 | ||
1187fc33 | 1037 | r = link_request_to_set_flags(link); |
e16e4b3b DS |
1038 | if (r < 0) |
1039 | return r; | |
1040 | ||
1187fc33 | 1041 | r = link_request_to_set_group(link); |
99d2baa2 SS |
1042 | if (r < 0) |
1043 | return r; | |
1044 | ||
1187fc33 YW |
1045 | r = link_configure_mtu(link); |
1046 | if (r < 0) | |
1047 | return r; | |
1048 | ||
1049 | r = link_request_to_set_addrgen_mode(link); | |
1050 | if (r < 0) | |
1051 | return r; | |
1052 | ||
1053 | r = link_request_to_set_master(link); | |
1054 | if (r < 0) | |
1055 | return r; | |
1056 | ||
1057 | r = link_request_stacked_netdevs(link); | |
1058 | if (r < 0) | |
1059 | return r; | |
1060 | ||
1061 | r = link_request_to_set_bond(link); | |
1062 | if (r < 0) | |
1063 | return r; | |
1064 | ||
1065 | r = link_request_to_set_bridge(link); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | ||
1069 | r = link_request_to_set_bridge_vlan(link); | |
1070 | if (r < 0) | |
1071 | return r; | |
1072 | ||
1073 | r = link_request_to_activate(link); | |
89fe6535 SS |
1074 | if (r < 0) |
1075 | return r; | |
1076 | ||
2ffd6d73 YW |
1077 | r = ipv4ll_configure(link); |
1078 | if (r < 0) | |
1079 | return r; | |
64b21ece | 1080 | |
ccffa166 | 1081 | r = link_request_dhcp4_client(link); |
2ffd6d73 YW |
1082 | if (r < 0) |
1083 | return r; | |
eb34d4af | 1084 | |
ccffa166 | 1085 | r = link_request_dhcp6_client(link); |
2ffd6d73 YW |
1086 | if (r < 0) |
1087 | return r; | |
f5a8c43f | 1088 | |
ba4c7184 | 1089 | r = link_request_ndisc(link); |
2ffd6d73 YW |
1090 | if (r < 0) |
1091 | return r; | |
4138fb2c | 1092 | |
1d28a3cf YW |
1093 | r = link_request_dhcp_server(link); |
1094 | if (r < 0) | |
1095 | return r; | |
1096 | ||
a254fab2 | 1097 | r = link_request_radv(link); |
086b8853 YW |
1098 | if (r < 0) |
1099 | return r; | |
7465dd22 | 1100 | |
2ffd6d73 YW |
1101 | r = link_lldp_rx_configure(link); |
1102 | if (r < 0) | |
1103 | return r; | |
ce43e484 | 1104 | |
c01b9b87 YW |
1105 | r = link_lldp_tx_configure(link); |
1106 | if (r < 0) | |
1107 | return r; | |
1108 | ||
5e3bb5da YW |
1109 | r = link_drop_foreign_config(link); |
1110 | if (r < 0) | |
1111 | return r; | |
4c649652 | 1112 | |
1187fc33 YW |
1113 | r = link_request_static_configs(link); |
1114 | if (r < 0) | |
1115 | return r; | |
1116 | ||
1117 | if (!link_has_carrier(link)) | |
1118 | return 0; | |
1119 | ||
1120 | return link_acquire_dynamic_conf(link); | |
505f8da7 TG |
1121 | } |
1122 | ||
170e88c8 YW |
1123 | static int link_get_network(Link *link, Network **ret) { |
1124 | Network *network; | |
1a3caa49 | 1125 | int r; |
170e88c8 YW |
1126 | |
1127 | assert(link); | |
1128 | assert(link->manager); | |
1129 | assert(ret); | |
1130 | ||
1131 | ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { | |
1132 | bool warn = false; | |
1133 | ||
1a3caa49 | 1134 | r = net_match_config( |
170e88c8 | 1135 | &network->match, |
8de56fb3 | 1136 | link->dev, |
52135071 YW |
1137 | &link->hw_addr, |
1138 | &link->permanent_hw_addr, | |
170e88c8 YW |
1139 | link->driver, |
1140 | link->iftype, | |
65022cd7 | 1141 | link->kind, |
170e88c8 YW |
1142 | link->ifname, |
1143 | link->alternative_names, | |
1144 | link->wlan_iftype, | |
1145 | link->ssid, | |
1a3caa49 YW |
1146 | &link->bssid); |
1147 | if (r < 0) | |
1148 | return r; | |
1149 | if (r == 0) | |
170e88c8 YW |
1150 | continue; |
1151 | ||
8de56fb3 | 1152 | if (network->match.ifname && link->dev) { |
170e88c8 YW |
1153 | uint8_t name_assign_type = NET_NAME_UNKNOWN; |
1154 | const char *attr; | |
1155 | ||
8de56fb3 | 1156 | if (sd_device_get_sysattr_value(link->dev, "name_assign_type", &attr) >= 0) |
170e88c8 YW |
1157 | (void) safe_atou8(attr, &name_assign_type); |
1158 | ||
1159 | warn = name_assign_type == NET_NAME_ENUM; | |
1160 | } | |
1161 | ||
1162 | log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, | |
1163 | "found matching network '%s'%s.", | |
1164 | network->filename, | |
1165 | warn ? ", based on potentially unpredictable interface name" : ""); | |
1166 | ||
1167 | if (network->unmanaged) | |
1168 | return -ENOENT; | |
1169 | ||
1170 | *ret = network; | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | return -ENOENT; | |
1175 | } | |
1176 | ||
7f80fa12 | 1177 | static int link_reconfigure_impl(Link *link, bool force) { |
cb71e9c6 | 1178 | Network *network = NULL; |
9aa2585e | 1179 | NetDev *netdev = NULL; |
ad932b15 YW |
1180 | int r; |
1181 | ||
5a1860f7 | 1182 | assert(link); |
572b21d9 | 1183 | |
fb961119 YW |
1184 | if (!IN_SET(link->state, LINK_STATE_INITIALIZED, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED, LINK_STATE_UNMANAGED)) |
1185 | return 0; | |
1186 | ||
9aa2585e YW |
1187 | r = netdev_get(link->manager, link->ifname, &netdev); |
1188 | if (r < 0 && r != -ENOENT) | |
1189 | return r; | |
1190 | ||
170e88c8 | 1191 | r = link_get_network(link, &network); |
cb71e9c6 | 1192 | if (r < 0 && r != -ENOENT) |
ad932b15 YW |
1193 | return r; |
1194 | ||
fb961119 YW |
1195 | if (link->state != LINK_STATE_UNMANAGED && !network) |
1196 | /* If link is in initialized state, then link->network is also NULL. */ | |
1197 | force = true; | |
1198 | ||
99b8517c | 1199 | if (link->network == network && !force) |
ad932b15 YW |
1200 | return 0; |
1201 | ||
fb961119 YW |
1202 | if (network) { |
1203 | if (link->state == LINK_STATE_INITIALIZED) | |
1204 | log_link_info(link, "Configuring with %s.", network->filename); | |
1205 | else | |
1206 | log_link_info(link, "Reconfiguring with %s.", network->filename); | |
1207 | } else | |
1208 | log_link_full(link, link->state == LINK_STATE_INITIALIZED ? LOG_DEBUG : LOG_INFO, | |
1209 | "Unmanaging interface."); | |
ad932b15 YW |
1210 | |
1211 | /* Dropping old .network file */ | |
2a99eed0 | 1212 | r = link_stop_engines(link, false); |
572b21d9 | 1213 | if (r < 0) |
ad932b15 | 1214 | return r; |
ad932b15 | 1215 | |
19d9a5ad YW |
1216 | link_drop_requests(link); |
1217 | ||
81db4f3d | 1218 | if (network && !force && network->keep_configuration != KEEP_CONFIGURATION_YES) |
b4564f4e YW |
1219 | /* When a new/updated .network file is assigned, first make all configs (addresses, |
1220 | * routes, and so on) foreign, and then drop unnecessary configs later by | |
81db4f3d YW |
1221 | * link_drop_foreign_config() in link_configure(). |
1222 | * Note, when KeepConfiguration=yes, link_drop_foreign_config() does nothing. Hence, | |
1223 | * here we need to drop the configs such as addresses, routes, and so on configured by | |
1224 | * the previously assigned .network file. */ | |
b4564f4e YW |
1225 | link_foreignize_config(link); |
1226 | else { | |
a0e99a37 YW |
1227 | /* Remove all managed configs. Note, foreign configs are removed in later by |
1228 | * link_configure() -> link_drop_foreign_config() if the link is managed by us. */ | |
1229 | r = link_drop_managed_config(link); | |
b4564f4e YW |
1230 | if (r < 0) |
1231 | return r; | |
1232 | } | |
ad932b15 | 1233 | |
3cf58ef3 YW |
1234 | /* The bound_to map depends on .network file, hence it needs to be freed. But, do not free the |
1235 | * bound_by map. Otherwise, if a link enters unmanaged state below, then its carrier state will | |
1236 | * not propagated to other interfaces anymore. Moreover, it is not necessary to recreate the | |
1237 | * map here, as it depends on .network files assigned to other links. */ | |
1238 | link_free_bound_to_list(link); | |
1239 | ||
ad932b15 YW |
1240 | link_free_engines(link); |
1241 | link->network = network_unref(link->network); | |
1242 | ||
9aa2585e YW |
1243 | netdev_unref(link->netdev); |
1244 | link->netdev = netdev_ref(netdev); | |
1245 | ||
cb71e9c6 YW |
1246 | if (!network) { |
1247 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1248 | return 0; | |
1249 | } | |
1250 | ||
ad932b15 | 1251 | /* Then, apply new .network file */ |
9092113d | 1252 | link->network = network_ref(network); |
b156a95d | 1253 | link_update_operstate(link, true); |
9092113d | 1254 | link_dirty(link); |
ad932b15 | 1255 | |
ad932b15 | 1256 | link_set_state(link, LINK_STATE_INITIALIZED); |
61135582 | 1257 | link->activated = false; |
ad932b15 | 1258 | |
ad932b15 YW |
1259 | r = link_configure(link); |
1260 | if (r < 0) | |
1261 | return r; | |
1262 | ||
0e397560 | 1263 | return 1; |
ad932b15 YW |
1264 | } |
1265 | ||
96f5f9ef | 1266 | static int link_reconfigure_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, bool force) { |
572b21d9 YW |
1267 | int r; |
1268 | ||
d09a179e YW |
1269 | assert(link); |
1270 | ||
5a1860f7 YW |
1271 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to update link state"); |
1272 | if (r <= 0) | |
1273 | return r; | |
1274 | ||
7f80fa12 | 1275 | r = link_reconfigure_impl(link, force); |
d09a179e | 1276 | if (r < 0) { |
572b21d9 | 1277 | link_enter_failed(link); |
d09a179e YW |
1278 | return 0; |
1279 | } | |
572b21d9 | 1280 | |
d09a179e | 1281 | return r; |
572b21d9 YW |
1282 | } |
1283 | ||
5a1860f7 | 1284 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1285 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
5a1860f7 | 1286 | } |
572b21d9 | 1287 | |
5a1860f7 | 1288 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
96f5f9ef | 1289 | return link_reconfigure_handler_internal(rtnl, m, link, /* force = */ true); |
572b21d9 YW |
1290 | } |
1291 | ||
d09a179e | 1292 | static int link_reconfigure_after_sleep_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
572b21d9 YW |
1293 | int r; |
1294 | ||
d09a179e YW |
1295 | assert(link); |
1296 | ||
96f5f9ef | 1297 | r = link_reconfigure_handler_internal(rtnl, m, link, /* force = */ false); |
d09a179e YW |
1298 | if (r != 0) |
1299 | return r; | |
1300 | ||
1301 | /* r == 0 means an error occurs, the link is unmanaged, or the matching network file is unchanged. */ | |
1302 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) | |
1303 | return 0; | |
1304 | ||
1305 | /* re-request static configs, and restart engines. */ | |
1306 | r = link_stop_engines(link, false); | |
1307 | if (r < 0) { | |
1308 | link_enter_failed(link); | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | r = link_acquire_dynamic_conf(link); | |
1313 | if (r < 0) { | |
1314 | link_enter_failed(link); | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | r = link_request_static_configs(link); | |
1319 | if (r < 0) { | |
1320 | link_enter_failed(link); | |
1321 | return 0; | |
1322 | } | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static int link_reconfigure_internal(Link *link, link_netlink_message_handler_t callback) { | |
1328 | int r; | |
1329 | ||
1330 | assert(link); | |
1331 | assert(callback); | |
1332 | ||
8bceafa7 | 1333 | /* When link in pending or initialized state, then link_configure() will be called. To prevent |
f8dd4077 ZJS |
1334 | * the function from being called multiple times simultaneously, refuse to reconfigure the |
1335 | * interface in these cases. */ | |
8bceafa7 | 1336 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
f8dd4077 | 1337 | return 0; /* 0 means no-op. */ |
2c0d7ed3 | 1338 | |
d09a179e | 1339 | r = link_call_getlink(link, callback); |
572b21d9 YW |
1340 | if (r < 0) |
1341 | return r; | |
1342 | ||
8bceafa7 | 1343 | return 1; /* 1 means the interface will be reconfigured. */ |
572b21d9 YW |
1344 | } |
1345 | ||
d09a179e YW |
1346 | int link_reconfigure(Link *link, bool force) { |
1347 | return link_reconfigure_internal(link, force ? link_force_reconfigure_handler : link_reconfigure_handler); | |
1348 | } | |
1349 | ||
1350 | int link_reconfigure_after_sleep(Link *link) { | |
1351 | return link_reconfigure_internal(link, link_reconfigure_after_sleep_handler); | |
1352 | } | |
1353 | ||
e6bf7774 | 1354 | static int link_initialized_and_synced(Link *link) { |
505f8da7 TG |
1355 | int r; |
1356 | ||
1357 | assert(link); | |
505f8da7 TG |
1358 | assert(link->manager); |
1359 | ||
faa2e64f YW |
1360 | if (link->manager->test_mode) { |
1361 | log_link_debug(link, "Running in test mode, refusing to enter initialized state."); | |
1362 | link_set_state(link, LINK_STATE_UNMANAGED); | |
1363 | return 0; | |
1364 | } | |
1365 | ||
fb961119 | 1366 | /* This may get called either from the asynchronous netlink callback, |
0d411b7f | 1367 | * or directly from link_check_initialized() if running in a container. */ |
bd08ce56 | 1368 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) |
4232cf04 | 1369 | return 0; |
505f8da7 | 1370 | |
6a7a4e4d | 1371 | log_link_debug(link, "Link state is up-to-date"); |
bd08ce56 | 1372 | link_set_state(link, LINK_STATE_INITIALIZED); |
505f8da7 | 1373 | |
0d4ad91d AR |
1374 | r = link_new_bound_by_list(link); |
1375 | if (r < 0) | |
1376 | return r; | |
1377 | ||
1378 | r = link_handle_bound_by_list(link); | |
1379 | if (r < 0) | |
1380 | return r; | |
1381 | ||
fb961119 | 1382 | return link_reconfigure_impl(link, /* force = */ false); |
505f8da7 TG |
1383 | } |
1384 | ||
302a796f | 1385 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4ff296b0 YW |
1386 | int r; |
1387 | ||
5a1860f7 YW |
1388 | r = link_getlink_handler_internal(rtnl, m, link, "Failed to wait for the interface to be initialized"); |
1389 | if (r <= 0) | |
0b54c870 | 1390 | return r; |
572b21d9 | 1391 | |
4ff296b0 YW |
1392 | r = link_initialized_and_synced(link); |
1393 | if (r < 0) | |
1394 | link_enter_failed(link); | |
5a1860f7 YW |
1395 | |
1396 | return 0; | |
e6bf7774 YW |
1397 | } |
1398 | ||
3be9d62a | 1399 | static int link_initialized(Link *link, sd_device *device) { |
b0ff6dea YW |
1400 | int r; |
1401 | ||
4f561e8e | 1402 | assert(link); |
4f561e8e TG |
1403 | assert(device); |
1404 | ||
160203e9 YW |
1405 | /* Always replace with the new sd_device object. As the sysname (and possibly other properties |
1406 | * or sysattrs) may be outdated. */ | |
8de56fb3 | 1407 | device_unref_and_replace(link->dev, device); |
4f561e8e | 1408 | |
b0ff6dea YW |
1409 | r = link_set_sr_iov_ifindices(link); |
1410 | if (r < 0) | |
1411 | log_link_warning_errno(link, r, "Failed to manage SR-IOV PF and VF ports, ignoring: %m"); | |
1412 | ||
160203e9 YW |
1413 | /* Do not ignore unamanaged state case here. If an interface is renamed after being once |
1414 | * configured, and the corresponding .network file has Name= in [Match] section, then the | |
1415 | * interface may be already in unmanaged state. See #20657. */ | |
1416 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_UNMANAGED)) | |
679b3605 TG |
1417 | return 0; |
1418 | ||
79008bdd | 1419 | log_link_debug(link, "udev initialized link"); |
bd08ce56 | 1420 | link_set_state(link, LINK_STATE_INITIALIZED); |
4f561e8e | 1421 | |
3c9b8860 TG |
1422 | /* udev has initialized the link, but we don't know if we have yet |
1423 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
1424 | * when it returns we know that the pending NEWLINKs have already been | |
1425 | * processed and that we are up-to-date */ | |
4f561e8e | 1426 | |
5a1860f7 | 1427 | return link_call_getlink(link, link_initialized_handler); |
cc2d7efc YW |
1428 | } |
1429 | ||
0d411b7f | 1430 | static int link_check_initialized(Link *link) { |
51517f9e | 1431 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
5a937ea2 | 1432 | int r; |
505f8da7 | 1433 | |
0d411b7f | 1434 | assert(link); |
505f8da7 | 1435 | |
82f52245 | 1436 | if (!udev_available()) |
0d411b7f | 1437 | return link_initialized_and_synced(link); |
852a3916 YW |
1438 | |
1439 | /* udev should be around */ | |
0ac655a6 | 1440 | r = sd_device_new_from_ifindex(&device, link->ifindex); |
852a3916 YW |
1441 | if (r < 0) { |
1442 | log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); | |
1443 | return 0; | |
1444 | } | |
1445 | ||
1446 | r = sd_device_get_is_initialized(device); | |
0d411b7f YW |
1447 | if (r < 0) |
1448 | return log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); | |
852a3916 YW |
1449 | if (r == 0) { |
1450 | /* not yet ready */ | |
1451 | log_link_debug(link, "link pending udev initialization..."); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
1455 | r = device_is_renaming(device); | |
0d411b7f YW |
1456 | if (r < 0) |
1457 | return log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); | |
852a3916 YW |
1458 | if (r > 0) { |
1459 | log_link_debug(link, "Interface is being renamed, pending initialization."); | |
1460 | return 0; | |
4f561e8e | 1461 | } |
505f8da7 | 1462 | |
0d411b7f | 1463 | return link_initialized(link, device); |
a748b692 TG |
1464 | } |
1465 | ||
1fd3ac1e | 1466 | int manager_udev_process_link(Manager *m, sd_device *device, sd_device_action_t action) { |
3be9d62a | 1467 | int r, ifindex; |
1fd3ac1e | 1468 | Link *link; |
3be9d62a YW |
1469 | |
1470 | assert(m); | |
1471 | assert(device); | |
1472 | ||
3be9d62a | 1473 | r = sd_device_get_ifindex(device, &ifindex); |
1fd3ac1e YW |
1474 | if (r < 0) |
1475 | return log_device_debug_errno(device, r, "Failed to get ifindex: %m"); | |
3be9d62a | 1476 | |
75255a8d YW |
1477 | r = link_get_by_index(m, ifindex, &link); |
1478 | if (r < 0) { | |
1479 | /* This error is not critical, as the corresponding rtnl message may be received later. */ | |
1480 | log_device_debug_errno(device, r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); | |
1481 | return 0; | |
1482 | } | |
1483 | ||
1484 | /* Let's unref the sd-device object assigned to the corresponding Link object, but keep the Link | |
1485 | * object here. It will be removed only when rtnetlink says so. */ | |
1486 | if (action == SD_DEVICE_REMOVE) { | |
1487 | link->dev = sd_device_unref(link->dev); | |
1488 | return 0; | |
1489 | } | |
1490 | ||
3be9d62a | 1491 | r = device_is_renaming(device); |
1fd3ac1e YW |
1492 | if (r < 0) |
1493 | return log_device_debug_errno(device, r, "Failed to determine if the device is renaming or not: %m"); | |
3be9d62a | 1494 | if (r > 0) { |
1fd3ac1e | 1495 | log_device_debug(device, "Device is renaming, waiting for the interface to be renamed."); |
71cdfe16 YW |
1496 | /* TODO: |
1497 | * What happens when a device is initialized, then soon renamed after that? When we detect | |
1498 | * such, maybe we should cancel or postpone all queued requests for the interface. */ | |
3be9d62a YW |
1499 | return 0; |
1500 | } | |
1501 | ||
4b9a8c2b YW |
1502 | r = link_initialized(link, device); |
1503 | if (r < 0) | |
1504 | link_enter_failed(link); | |
3be9d62a YW |
1505 | |
1506 | return 0; | |
1507 | } | |
1508 | ||
9c0a72f9 | 1509 | static int link_carrier_gained(Link *link) { |
6706ce2f | 1510 | bool force_reconfigure; |
9c0a72f9 TG |
1511 | int r; |
1512 | ||
1513 | assert(link); | |
1514 | ||
6706ce2f YW |
1515 | r = event_source_disable(link->carrier_lost_timer); |
1516 | if (r < 0) | |
1517 | log_link_warning_errno(link, r, "Failed to disable carrier lost timer, ignoring: %m"); | |
1518 | ||
d9910948 YW |
1519 | /* If a wireless interface was connected to an access point, and the SSID is changed (that is, |
1520 | * both previous_ssid and ssid are non-NULL), then the connected wireless network could be | |
1521 | * changed. So, always reconfigure the link. Which means e.g. the DHCP client will be | |
1522 | * restarted, and the correct network information will be gained. | |
1523 | * | |
1524 | * However, do not reconfigure the wireless interface forcibly if it was not connected to any | |
1525 | * access points previously (previous_ssid is NULL in this case). As, a .network file may be | |
1526 | * already assigned to the interface (in that case, the .network file does not have the SSID= | |
1527 | * setting in the [Match] section), and the interface is already being configured. Of course, | |
1528 | * there may exist another .network file with higher priority and a matching SSID= setting. But | |
1529 | * in that case, link_reconfigure_impl() can handle that without the force_reconfigure flag. | |
1530 | * | |
6706ce2f | 1531 | * For non-wireless interfaces, we have no way to detect the connected network change. So, |
d9910948 YW |
1532 | * setting force_reconfigure = false. Note, both ssid and previous_ssid are NULL in that case. */ |
1533 | force_reconfigure = link->previous_ssid && !streq_ptr(link->previous_ssid, link->ssid); | |
6706ce2f YW |
1534 | link->previous_ssid = mfree(link->previous_ssid); |
1535 | ||
a72d2a7b | 1536 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_FAILED, LINK_STATE_LINGER)) { |
b7ac1284 YW |
1537 | /* At this stage, both wlan and link information should be up-to-date. Hence, |
1538 | * it is not necessary to call RTM_GETLINK, NL80211_CMD_GET_INTERFACE, or | |
1539 | * NL80211_CMD_GET_STATION commands, and simply call link_reconfigure_impl(). | |
1540 | * Note, link_reconfigure_impl() returns 1 when the link is reconfigured. */ | |
6706ce2f | 1541 | r = link_reconfigure_impl(link, force_reconfigure); |
b7ac1284 YW |
1542 | if (r != 0) |
1543 | return r; | |
1544 | } | |
1545 | ||
aa9117c0 YW |
1546 | r = link_handle_bound_by_list(link); |
1547 | if (r < 0) | |
1548 | return r; | |
1549 | ||
600b7898 YW |
1550 | if (link->iftype == ARPHRD_CAN) |
1551 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 | 1552 | return 0; |
600b7898 | 1553 | |
b9ea3d2e | 1554 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
8566df79 | 1555 | r = link_acquire_dynamic_conf(link); |
f0269653 | 1556 | if (r < 0) |
9c0a72f9 | 1557 | return r; |
6fc25497 | 1558 | |
97108953 | 1559 | r = link_request_static_configs(link); |
6fc25497 SS |
1560 | if (r < 0) |
1561 | return r; | |
9c0a72f9 TG |
1562 | } |
1563 | ||
aa9117c0 | 1564 | return 0; |
9c0a72f9 TG |
1565 | } |
1566 | ||
6706ce2f YW |
1567 | static int link_carrier_lost_impl(Link *link) { |
1568 | int r, ret = 0; | |
1569 | ||
1570 | assert(link); | |
1571 | ||
1572 | link->previous_ssid = mfree(link->previous_ssid); | |
1573 | ||
1574 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1575 | return 0; | |
1576 | ||
1577 | if (!link->network) | |
1578 | return 0; | |
1579 | ||
1580 | r = link_stop_engines(link, false); | |
1581 | if (r < 0) | |
1582 | ret = r; | |
1583 | ||
a0e99a37 | 1584 | r = link_drop_managed_config(link); |
6706ce2f YW |
1585 | if (r < 0 && ret >= 0) |
1586 | ret = r; | |
1587 | ||
1588 | return ret; | |
1589 | } | |
1590 | ||
1591 | static int link_carrier_lost_handler(sd_event_source *s, uint64_t usec, void *userdata) { | |
99534007 | 1592 | Link *link = ASSERT_PTR(userdata); |
6706ce2f YW |
1593 | int r; |
1594 | ||
6706ce2f YW |
1595 | r = link_carrier_lost_impl(link); |
1596 | if (r < 0) { | |
1597 | log_link_warning_errno(link, r, "Failed to process carrier lost event: %m"); | |
1598 | link_enter_failed(link); | |
1599 | } | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
9c0a72f9 | 1604 | static int link_carrier_lost(Link *link) { |
b7326069 YW |
1605 | uint16_t dhcp_mtu; |
1606 | usec_t usec; | |
9c0a72f9 TG |
1607 | int r; |
1608 | ||
1609 | assert(link); | |
1610 | ||
aa9117c0 YW |
1611 | r = link_handle_bound_by_list(link); |
1612 | if (r < 0) | |
1613 | return r; | |
93b4dab5 | 1614 | |
600b7898 YW |
1615 | if (link->iftype == ARPHRD_CAN) |
1616 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
aa9117c0 YW |
1617 | return 0; |
1618 | ||
f1c22cf4 YW |
1619 | if (!link->network) |
1620 | return 0; | |
1621 | ||
b7326069 YW |
1622 | if (link->network->ignore_carrier_loss_set) |
1623 | /* If IgnoreCarrierLoss= is explicitly specified, then use the specified value. */ | |
1624 | usec = link->network->ignore_carrier_loss_usec; | |
1625 | ||
1626 | else if (link->network->bond && link->wlan_iftype > 0) | |
1627 | /* Enslaving wlan interface to a bond disconnects from the connected AP, and causes its | |
1628 | * carrier to be lost. See #19832. */ | |
1629 | usec = 3 * USEC_PER_SEC; | |
1630 | ||
1631 | else if (link->network->dhcp_use_mtu && | |
1632 | link->dhcp_lease && | |
1633 | sd_dhcp_lease_get_mtu(link->dhcp_lease, &dhcp_mtu) >= 0 && | |
1634 | dhcp_mtu != link->original_mtu) | |
1635 | /* Some drivers reset interfaces when changing MTU. Resetting interfaces by the static | |
1636 | * MTU should not cause any issues, as MTU is changed only once. However, setting MTU | |
1637 | * through DHCP lease causes an infinite loop of resetting the interface. See #18738. */ | |
1638 | usec = 5 * USEC_PER_SEC; | |
1639 | ||
1640 | else | |
1641 | /* Otherwise, use the currently set value. */ | |
1642 | usec = link->network->ignore_carrier_loss_usec; | |
1643 | ||
1644 | if (usec == USEC_INFINITY) | |
aa9117c0 | 1645 | return 0; |
600b7898 | 1646 | |
b7326069 | 1647 | if (usec == 0) |
6706ce2f YW |
1648 | return link_carrier_lost_impl(link); |
1649 | ||
1650 | return event_reset_time_relative(link->manager->event, | |
1651 | &link->carrier_lost_timer, | |
ba4e0427 | 1652 | CLOCK_BOOTTIME, |
b7326069 | 1653 | usec, |
6706ce2f YW |
1654 | 0, |
1655 | link_carrier_lost_handler, | |
1656 | link, | |
1657 | 0, | |
1658 | "link-carrier-loss", | |
1659 | true); | |
0c9ee5d5 YW |
1660 | } |
1661 | ||
0c9ee5d5 YW |
1662 | static int link_admin_state_up(Link *link) { |
1663 | int r; | |
1664 | ||
1665 | assert(link); | |
1666 | ||
1667 | /* This is called every time an interface admin state changes to up; | |
1668 | * specifically, when IFF_UP flag changes from unset to set. */ | |
1669 | ||
1670 | if (!link->network) | |
1671 | return 0; | |
1672 | ||
899b0e5e | 1673 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { |
1a054a20 | 1674 | log_link_info(link, "Activation policy is \"always-down\", forcing link down."); |
712fd5d2 | 1675 | return link_request_to_bring_up_or_down(link, /* up = */ false); |
0c9ee5d5 YW |
1676 | } |
1677 | ||
1678 | /* We set the ipv6 mtu after the device mtu, but the kernel resets | |
1679 | * ipv6 mtu on NETDEV_UP, so we need to reset it. */ | |
1680 | r = link_set_ipv6_mtu(link); | |
1681 | if (r < 0) | |
1682 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU, ignoring: %m"); | |
1683 | ||
1684 | return 0; | |
1685 | } | |
1686 | ||
1687 | static int link_admin_state_down(Link *link) { | |
1688 | assert(link); | |
1689 | ||
1690 | if (!link->network) | |
1691 | return 0; | |
1692 | ||
899b0e5e | 1693 | if (link->activated && link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { |
1a054a20 | 1694 | log_link_info(link, "Activation policy is \"always-up\", forcing link up."); |
712fd5d2 | 1695 | return link_request_to_bring_up_or_down(link, /* up = */ true); |
0c9ee5d5 YW |
1696 | } |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | ||
0c9ee5d5 YW |
1701 | static bool link_is_enslaved(Link *link) { |
1702 | if (link->flags & IFF_SLAVE) | |
0c9ee5d5 YW |
1703 | return true; |
1704 | ||
1f024462 | 1705 | if (link->master_ifindex > 0) |
0c9ee5d5 YW |
1706 | return true; |
1707 | ||
0c9ee5d5 YW |
1708 | return false; |
1709 | } | |
1710 | ||
1711 | static LinkAddressState address_state_from_scope(uint8_t scope) { | |
1712 | if (scope < RT_SCOPE_SITE) | |
1713 | /* universally accessible addresses found */ | |
1714 | return LINK_ADDRESS_STATE_ROUTABLE; | |
1715 | ||
1716 | if (scope < RT_SCOPE_HOST) | |
1717 | /* only link or site local addresses found */ | |
1718 | return LINK_ADDRESS_STATE_DEGRADED; | |
1719 | ||
1720 | /* no useful addresses found */ | |
1721 | return LINK_ADDRESS_STATE_OFF; | |
1722 | } | |
1723 | ||
1724 | void link_update_operstate(Link *link, bool also_update_master) { | |
1725 | LinkOperationalState operstate; | |
1726 | LinkCarrierState carrier_state; | |
1727 | LinkAddressState ipv4_address_state, ipv6_address_state, address_state; | |
1728 | LinkOnlineState online_state; | |
1729 | _cleanup_strv_free_ char **p = NULL; | |
1730 | uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE; | |
1731 | bool changed = false; | |
1732 | Address *address; | |
1733 | ||
1734 | assert(link); | |
1735 | ||
1736 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1737 | carrier_state = LINK_CARRIER_STATE_DORMANT; | |
1738 | else if (link_has_carrier(link)) { | |
1739 | if (link_is_enslaved(link)) | |
1740 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
1741 | else | |
1742 | carrier_state = LINK_CARRIER_STATE_CARRIER; | |
1743 | } else if (link->flags & IFF_UP) | |
1744 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; | |
1745 | else | |
1746 | carrier_state = LINK_CARRIER_STATE_OFF; | |
1747 | ||
1748 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { | |
1749 | Link *slave; | |
1750 | ||
1751 | SET_FOREACH(slave, link->slaves) { | |
1752 | link_update_operstate(slave, false); | |
1753 | ||
1754 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) | |
1755 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | SET_FOREACH(address, link->addresses) { | |
1760 | if (!address_is_ready(address)) | |
1761 | continue; | |
1762 | ||
1763 | if (address->family == AF_INET) | |
1764 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
1765 | ||
1766 | if (address->family == AF_INET6) | |
1767 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1768 | } | |
1769 | ||
0c9ee5d5 YW |
1770 | ipv4_address_state = address_state_from_scope(ipv4_scope); |
1771 | ipv6_address_state = address_state_from_scope(ipv6_scope); | |
1772 | address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope)); | |
1773 | ||
1774 | /* Mapping of address and carrier state vs operational state | |
1775 | * carrier state | |
1776 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1777 | * ------------------------------------------------------------------------------ | |
1778 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
1779 | * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved | |
1780 | * routable | off | no-carrier | dormant | degraded-carrier | routable | routable | |
1781 | */ | |
1782 | ||
1783 | if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) | |
1784 | operstate = (LinkOperationalState) carrier_state; | |
1785 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
1786 | operstate = LINK_OPERSTATE_ROUTABLE; | |
1787 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
1788 | operstate = LINK_OPERSTATE_DEGRADED; | |
1789 | else | |
1790 | operstate = LINK_OPERSTATE_ENSLAVED; | |
1791 | ||
1792 | /* Only determine online state for managed links with RequiredForOnline=yes */ | |
1793 | if (!link->network || !link->network->required_for_online) | |
1794 | online_state = _LINK_ONLINE_STATE_INVALID; | |
1795 | else if (operstate < link->network->required_operstate_for_online.min || | |
1796 | operstate > link->network->required_operstate_for_online.max) | |
1797 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1798 | else { | |
1799 | AddressFamily required_family = link->network->required_family_for_online; | |
1800 | bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; | |
1801 | bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; | |
1802 | ||
1803 | /* The operational state is within the range required for online. | |
1804 | * If a particular address family is also required, we might revert | |
1805 | * to offline in the blocks below. */ | |
1806 | online_state = LINK_ONLINE_STATE_ONLINE; | |
1807 | ||
1808 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { | |
1809 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1810 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1811 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
1812 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1813 | } | |
1814 | ||
1815 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { | |
1816 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1817 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1818 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
1819 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | if (link->carrier_state != carrier_state) { | |
1824 | link->carrier_state = carrier_state; | |
1825 | changed = true; | |
1826 | if (strv_extend(&p, "CarrierState") < 0) | |
1827 | log_oom(); | |
1828 | } | |
1829 | ||
1830 | if (link->address_state != address_state) { | |
1831 | link->address_state = address_state; | |
1832 | changed = true; | |
1833 | if (strv_extend(&p, "AddressState") < 0) | |
1834 | log_oom(); | |
1835 | } | |
0d4ad91d | 1836 | |
0c9ee5d5 YW |
1837 | if (link->ipv4_address_state != ipv4_address_state) { |
1838 | link->ipv4_address_state = ipv4_address_state; | |
1839 | changed = true; | |
1840 | if (strv_extend(&p, "IPv4AddressState") < 0) | |
1841 | log_oom(); | |
1842 | } | |
9c0a72f9 | 1843 | |
0c9ee5d5 YW |
1844 | if (link->ipv6_address_state != ipv6_address_state) { |
1845 | link->ipv6_address_state = ipv6_address_state; | |
1846 | changed = true; | |
1847 | if (strv_extend(&p, "IPv6AddressState") < 0) | |
1848 | log_oom(); | |
1849 | } | |
9c0a72f9 | 1850 | |
0c9ee5d5 YW |
1851 | if (link->operstate != operstate) { |
1852 | link->operstate = operstate; | |
1853 | changed = true; | |
1854 | if (strv_extend(&p, "OperationalState") < 0) | |
1855 | log_oom(); | |
1856 | } | |
9c0a72f9 | 1857 | |
0c9ee5d5 YW |
1858 | if (link->online_state != online_state) { |
1859 | link->online_state = online_state; | |
1860 | changed = true; | |
1861 | if (strv_extend(&p, "OnlineState") < 0) | |
1862 | log_oom(); | |
1863 | } | |
9c0a72f9 | 1864 | |
0c9ee5d5 YW |
1865 | if (p) |
1866 | link_send_changed_strv(link, p); | |
1867 | if (changed) | |
1868 | link_dirty(link); | |
9c0a72f9 | 1869 | |
0c9ee5d5 YW |
1870 | if (also_update_master) { |
1871 | Link *master; | |
9c0a72f9 | 1872 | |
0c9ee5d5 YW |
1873 | if (link_get_master(link, &master) >= 0) |
1874 | link_update_operstate(master, true); | |
1875 | } | |
9c0a72f9 TG |
1876 | } |
1877 | ||
0c9ee5d5 YW |
1878 | #define FLAG_STRING(string, flag, old, new) \ |
1879 | (((old ^ new) & flag) \ | |
1880 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
1881 | : "") | |
1882 | ||
0d411b7f | 1883 | static int link_update_flags(Link *link, sd_netlink_message *message) { |
96f5f9ef | 1884 | bool link_was_admin_up, had_carrier; |
0c9ee5d5 YW |
1885 | uint8_t operstate; |
1886 | unsigned flags; | |
d236718c DS |
1887 | int r; |
1888 | ||
61135582 | 1889 | assert(link); |
0d411b7f | 1890 | assert(message); |
61135582 | 1891 | |
0d411b7f | 1892 | r = sd_rtnl_message_link_get_flags(message, &flags); |
0c9ee5d5 | 1893 | if (r < 0) |
0d411b7f | 1894 | return log_link_debug_errno(link, r, "rtnl: failed to read link flags: %m"); |
3be9d62a | 1895 | |
0d411b7f YW |
1896 | r = sd_netlink_message_read_u8(message, IFLA_OPERSTATE, &operstate); |
1897 | if (r == -ENODATA) | |
1898 | /* If we got a message without operstate, assume the state was unchanged. */ | |
0c9ee5d5 | 1899 | operstate = link->kernel_operstate; |
0d411b7f YW |
1900 | else if (r < 0) |
1901 | return log_link_debug_errno(link, r, "rtnl: failed to read operational state: %m"); | |
0c9ee5d5 | 1902 | |
0d411b7f | 1903 | if (link->flags == flags && link->kernel_operstate == operstate) |
61135582 DS |
1904 | return 0; |
1905 | ||
0c9ee5d5 YW |
1906 | if (link->flags != flags) { |
1907 | unsigned unknown_flags, unknown_flags_added, unknown_flags_removed; | |
61135582 | 1908 | |
0c9ee5d5 YW |
1909 | 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", |
1910 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), | |
1911 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
1912 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
1913 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
1914 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
1915 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
1916 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
1917 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
1918 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
1919 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
1920 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
1921 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
1922 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
1923 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
1924 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
1925 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
1926 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
1927 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
1928 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
d236718c | 1929 | |
0c9ee5d5 YW |
1930 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | |
1931 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
1932 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
1933 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
1934 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
1935 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
1936 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
1937 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
d236718c | 1938 | |
0c9ee5d5 YW |
1939 | if (unknown_flags_added) |
1940 | log_link_debug(link, "Unknown link flags gained, ignoring: %#.5x", unknown_flags_added); | |
61135582 | 1941 | |
0c9ee5d5 YW |
1942 | if (unknown_flags_removed) |
1943 | log_link_debug(link, "Unknown link flags lost, ignoring: %#.5x", unknown_flags_removed); | |
1944 | } | |
61135582 | 1945 | |
0d411b7f YW |
1946 | link_was_admin_up = link->flags & IFF_UP; |
1947 | had_carrier = link_has_carrier(link); | |
1948 | ||
0c9ee5d5 YW |
1949 | link->flags = flags; |
1950 | link->kernel_operstate = operstate; | |
36161cba | 1951 | |
0c9ee5d5 | 1952 | link_update_operstate(link, true); |
61135582 | 1953 | |
0d411b7f YW |
1954 | if (!link_was_admin_up && (link->flags & IFF_UP)) { |
1955 | log_link_info(link, "Link UP"); | |
22936833 | 1956 | |
0d411b7f YW |
1957 | r = link_admin_state_up(link); |
1958 | if (r < 0) | |
1959 | return r; | |
1960 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) { | |
1961 | log_link_info(link, "Link DOWN"); | |
0d4ad91d | 1962 | |
0d411b7f | 1963 | r = link_admin_state_down(link); |
0d4ad91d AR |
1964 | if (r < 0) |
1965 | return r; | |
7619683b TG |
1966 | } |
1967 | ||
0d411b7f YW |
1968 | if (!had_carrier && link_has_carrier(link)) { |
1969 | log_link_info(link, "Gained carrier"); | |
0d4ad91d | 1970 | |
0d411b7f | 1971 | r = link_carrier_gained(link); |
30de2b89 YW |
1972 | if (r < 0) |
1973 | return r; | |
0d411b7f YW |
1974 | } else if (had_carrier && !link_has_carrier(link)) { |
1975 | log_link_info(link, "Lost carrier"); | |
1976 | ||
1977 | r = link_carrier_lost(link); | |
0b54c870 YW |
1978 | if (r < 0) |
1979 | return r; | |
b8941f74 TG |
1980 | } |
1981 | ||
0d411b7f YW |
1982 | return 0; |
1983 | } | |
afe7fd56 | 1984 | |
0d411b7f YW |
1985 | static int link_update_master(Link *link, sd_netlink_message *message) { |
1986 | int master_ifindex, r; | |
7465dd22 | 1987 | |
0d411b7f YW |
1988 | assert(link); |
1989 | assert(message); | |
69629de9 | 1990 | |
0d411b7f YW |
1991 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &master_ifindex); |
1992 | if (r == -ENODATA) | |
1993 | return 0; | |
1994 | if (r < 0) | |
1995 | return log_link_debug_errno(link, r, "rtnl: failed to read master ifindex: %m"); | |
807667f7 | 1996 | |
571bf1aa YW |
1997 | if (master_ifindex == link->ifindex) |
1998 | master_ifindex = 0; | |
1999 | ||
0d411b7f YW |
2000 | if (master_ifindex == link->master_ifindex) |
2001 | return 0; | |
807667f7 | 2002 | |
0d411b7f | 2003 | if (link->master_ifindex == 0) |
8458ca26 | 2004 | log_link_debug(link, "Attached to master interface: %i", master_ifindex); |
0d411b7f | 2005 | else if (master_ifindex == 0) |
8458ca26 | 2006 | log_link_debug(link, "Detached from master interface: %i", link->master_ifindex); |
0d411b7f | 2007 | else |
e2341b6b DT |
2008 | log_link_debug(link, "Master interface changed: %i %s %i", link->master_ifindex, |
2009 | special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), master_ifindex); | |
807667f7 | 2010 | |
0d411b7f | 2011 | link_drop_from_master(link); |
807667f7 | 2012 | |
0d411b7f | 2013 | link->master_ifindex = master_ifindex; |
413708d1 | 2014 | |
0d411b7f YW |
2015 | r = link_append_to_master(link); |
2016 | if (r < 0) | |
2017 | return log_link_debug_errno(link, r, "Failed to append link to master: %m"); | |
7465dd22 | 2018 | |
0d411b7f YW |
2019 | return 0; |
2020 | } | |
807667f7 | 2021 | |
e1658632 YW |
2022 | static int link_update_driver(Link *link, sd_netlink_message *message) { |
2023 | int r; | |
2024 | ||
2025 | assert(link); | |
2026 | assert(link->manager); | |
2027 | assert(message); | |
2028 | ||
2029 | /* Driver is already read. Assuming the driver is never changed. */ | |
2030 | if (link->driver) | |
2031 | return 0; | |
2032 | ||
2033 | /* When udevd is running, read the driver after the interface is initialized by udevd. | |
2034 | * Otherwise, ethtool may not work correctly. See issue #22538. | |
2035 | * When udevd is not running, read the value when the interface is detected. */ | |
2036 | if (link->state != (udev_available() ? LINK_STATE_INITIALIZED : LINK_STATE_PENDING)) | |
2037 | return 0; | |
2038 | ||
2039 | r = ethtool_get_driver(&link->manager->ethtool_fd, link->ifname, &link->driver); | |
2040 | if (r < 0) { | |
2041 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
2042 | return 0; | |
2043 | } | |
2044 | ||
2045 | log_link_debug(link, "Found driver: %s", strna(link->driver)); | |
2046 | ||
2047 | if (streq_ptr(link->driver, "dsa")) { | |
2048 | uint32_t dsa_master_ifindex = 0; | |
2049 | ||
2050 | r = sd_netlink_message_read_u32(message, IFLA_LINK, &dsa_master_ifindex); | |
2051 | if (r < 0 && r != -ENODATA) | |
2052 | return log_link_debug_errno(link, r, "rtnl: failed to read ifindex of the DSA master interface: %m"); | |
2053 | ||
2054 | if (dsa_master_ifindex > INT_MAX) { | |
2055 | log_link_debug(link, "rtnl: received too large DSA master ifindex (%"PRIu32" > INT_MAX), ignoring.", | |
2056 | dsa_master_ifindex); | |
2057 | dsa_master_ifindex = 0; | |
2058 | } | |
2059 | ||
2060 | link->dsa_master_ifindex = (int) dsa_master_ifindex; | |
2061 | } | |
2062 | ||
2063 | return 0; | |
2064 | } | |
2065 | ||
2066 | static int link_update_permanent_hardware_address(Link *link, sd_netlink_message *message) { | |
2067 | int r; | |
2068 | ||
2069 | assert(link); | |
2070 | assert(link->manager); | |
2071 | assert(message); | |
2072 | ||
2073 | if (link->permanent_hw_addr.length > 0) | |
2074 | return 0; | |
2075 | ||
2076 | /* When udevd is running, read the permanent hardware address after the interface is | |
2077 | * initialized by udevd. Otherwise, ethtool may not work correctly. See issue #22538. | |
2078 | * When udevd is not running, read the value when the interface is detected. */ | |
2079 | if (link->state != (udev_available() ? LINK_STATE_INITIALIZED : LINK_STATE_PENDING)) | |
2080 | return 0; | |
2081 | ||
2082 | r = netlink_message_read_hw_addr(message, IFLA_PERM_ADDRESS, &link->permanent_hw_addr); | |
2083 | if (r < 0) { | |
2084 | if (r != -ENODATA) | |
2085 | return log_link_debug_errno(link, r, "Failed to read IFLA_PERM_ADDRESS attribute: %m"); | |
2086 | ||
2087 | if (netlink_message_read_hw_addr(message, IFLA_ADDRESS, NULL) >= 0) { | |
2088 | /* Fallback to ethtool, if the link has a hardware address. */ | |
2089 | r = ethtool_get_permanent_hw_addr(&link->manager->ethtool_fd, link->ifname, &link->permanent_hw_addr); | |
2090 | if (r < 0) | |
2091 | log_link_debug_errno(link, r, "Permanent hardware address not found, continuing without: %m"); | |
2092 | } | |
2093 | } | |
2094 | ||
2095 | if (link->permanent_hw_addr.length > 0) | |
2096 | log_link_debug(link, "Saved permanent hardware address: %s", HW_ADDR_TO_STR(&link->permanent_hw_addr)); | |
2097 | ||
2098 | return 0; | |
2099 | } | |
2100 | ||
0d411b7f | 2101 | static int link_update_hardware_address(Link *link, sd_netlink_message *message) { |
e2bacccd | 2102 | struct hw_addr_data addr; |
0d411b7f | 2103 | int r; |
d93d655c | 2104 | |
0d411b7f YW |
2105 | assert(link); |
2106 | assert(message); | |
dfc58b47 | 2107 | |
0d411b7f YW |
2108 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); |
2109 | if (r < 0 && r != -ENODATA) | |
2110 | return log_link_debug_errno(link, r, "rtnl: failed to read broadcast address: %m"); | |
4f882b2a | 2111 | |
e2bacccd | 2112 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &addr); |
0d411b7f YW |
2113 | if (r == -ENODATA) |
2114 | return 0; | |
2115 | if (r < 0) | |
fe321d45 | 2116 | return log_link_debug_errno(link, r, "rtnl: failed to read hardware address: %m"); |
bb262ef0 | 2117 | |
e2bacccd | 2118 | if (hw_addr_equal(&link->hw_addr, &addr)) |
0d411b7f | 2119 | return 0; |
a61bb41c | 2120 | |
de0f1579 | 2121 | if (link->hw_addr.length == 0) |
e2bacccd | 2122 | log_link_debug(link, "Saved hardware address: %s", HW_ADDR_TO_STR(&addr)); |
fe321d45 | 2123 | else { |
e2341b6b DT |
2124 | log_link_debug(link, "Hardware address is changed: %s %s %s", |
2125 | HW_ADDR_TO_STR(&link->hw_addr), | |
2126 | special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), | |
2127 | HW_ADDR_TO_STR(&addr)); | |
0d411b7f | 2128 | |
e74f1d07 | 2129 | hashmap_remove_value(link->manager->links_by_hw_addr, &link->hw_addr, link); |
fe321d45 YW |
2130 | } |
2131 | ||
e2bacccd YW |
2132 | link->hw_addr = addr; |
2133 | ||
fe321d45 YW |
2134 | if (!hw_addr_is_null(&link->hw_addr)) { |
2135 | r = hashmap_ensure_put(&link->manager->links_by_hw_addr, &hw_addr_hash_ops, &link->hw_addr, link); | |
2136 | if (r == -EEXIST && streq_ptr(link->kind, "bond")) | |
2137 | /* bonding master and its slaves have the same hardware address. */ | |
2138 | r = hashmap_replace(link->manager->links_by_hw_addr, &link->hw_addr, link); | |
2139 | if (r < 0) | |
2140 | log_link_debug_errno(link, r, "Failed to manage link by its new hardware address, ignoring: %m"); | |
2141 | } | |
0d411b7f | 2142 | |
76a86ffd YW |
2143 | r = ipv4ll_update_mac(link); |
2144 | if (r < 0) | |
2145 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); | |
2146 | ||
0d411b7f | 2147 | r = ipv4ll_update_mac(link); |
a61bb41c | 2148 | if (r < 0) |
0d411b7f | 2149 | return log_link_debug_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); |
a61bb41c | 2150 | |
0d411b7f YW |
2151 | r = dhcp4_update_mac(link); |
2152 | if (r < 0) | |
2153 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
d236718c | 2154 | |
0d411b7f YW |
2155 | r = dhcp6_update_mac(link); |
2156 | if (r < 0) | |
2157 | return log_link_debug_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
2158 | ||
2159 | r = radv_update_mac(link); | |
2160 | if (r < 0) | |
2161 | return log_link_debug_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
2162 | ||
3be64aa4 | 2163 | if (link->ndisc && link->hw_addr.length == ETH_ALEN) { |
ca2b7cd8 | 2164 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.ether); |
d236718c | 2165 | if (r < 0) |
0d411b7f YW |
2166 | return log_link_debug_errno(link, r, "Could not update MAC for NDisc: %m"); |
2167 | } | |
d236718c | 2168 | |
35778343 YW |
2169 | if (link->lldp_rx) { |
2170 | r = sd_lldp_rx_set_filter_address(link->lldp_rx, &link->hw_addr.ether); | |
61135582 | 2171 | if (r < 0) |
c01b9b87 YW |
2172 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Rx: %m"); |
2173 | } | |
2174 | ||
2175 | if (link->lldp_tx) { | |
2176 | r = sd_lldp_tx_set_hwaddr(link->lldp_tx, &link->hw_addr.ether); | |
2177 | if (r < 0) | |
2178 | return log_link_debug_errno(link, r, "Could not update MAC address for LLDP Tx: %m"); | |
61135582 DS |
2179 | } |
2180 | ||
0d411b7f YW |
2181 | return 0; |
2182 | } | |
a61bb41c | 2183 | |
0d411b7f | 2184 | static int link_update_mtu(Link *link, sd_netlink_message *message) { |
717ba5fc | 2185 | uint32_t mtu, min_mtu = 0, max_mtu = UINT32_MAX; |
0d411b7f | 2186 | int r; |
a61bb41c | 2187 | |
0d411b7f YW |
2188 | assert(link); |
2189 | assert(message); | |
2190 | ||
2191 | r = sd_netlink_message_read_u32(message, IFLA_MTU, &mtu); | |
2192 | if (r == -ENODATA) | |
2193 | return 0; | |
2194 | if (r < 0) | |
2195 | return log_link_debug_errno(link, r, "rtnl: failed to read MTU in RTM_NEWLINK message: %m"); | |
b5d0fd1e YW |
2196 | if (mtu == 0) |
2197 | return 0; | |
0d411b7f | 2198 | |
717ba5fc YW |
2199 | r = sd_netlink_message_read_u32(message, IFLA_MIN_MTU, &min_mtu); |
2200 | if (r < 0 && r != -ENODATA) | |
2201 | return log_link_debug_errno(link, r, "rtnl: failed to read minimum MTU in RTM_NEWLINK message: %m"); | |
2202 | ||
2203 | r = sd_netlink_message_read_u32(message, IFLA_MAX_MTU, &max_mtu); | |
2204 | if (r < 0 && r != -ENODATA) | |
2205 | return log_link_debug_errno(link, r, "rtnl: failed to read maximum MTU in RTM_NEWLINK message: %m"); | |
2206 | ||
717ba5fc YW |
2207 | if (max_mtu == 0) |
2208 | max_mtu = UINT32_MAX; | |
2209 | ||
2210 | link->min_mtu = min_mtu; | |
2211 | link->max_mtu = max_mtu; | |
2212 | ||
0d411b7f YW |
2213 | if (link->original_mtu == 0) { |
2214 | link->original_mtu = mtu; | |
717ba5fc YW |
2215 | log_link_debug(link, "Saved original MTU %" PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2216 | link->original_mtu, link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2217 | } |
2218 | ||
717ba5fc YW |
2219 | if (link->mtu == mtu) |
2220 | return 0; | |
2221 | ||
b5d0fd1e | 2222 | if (link->mtu != 0) |
e2341b6b DT |
2223 | log_link_debug(link, "MTU is changed: %"PRIu32" %s %"PRIu32" (min: %"PRIu32", max: %"PRIu32")", |
2224 | link->mtu, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), mtu, | |
2225 | link->min_mtu, link->max_mtu); | |
0d411b7f YW |
2226 | |
2227 | link->mtu = mtu; | |
2228 | ||
2229 | if (link->dhcp_client) { | |
2230 | r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu); | |
9c0a72f9 | 2231 | if (r < 0) |
0d411b7f YW |
2232 | return log_link_debug_errno(link, r, "Could not update MTU in DHCP client: %m"); |
2233 | } | |
a61bb41c | 2234 | |
0d411b7f YW |
2235 | if (link->radv) { |
2236 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
9c0a72f9 | 2237 | if (r < 0) |
0d411b7f | 2238 | return log_link_debug_errno(link, r, "Could not set MTU for Router Advertisement: %m"); |
a61bb41c TG |
2239 | } |
2240 | ||
2241 | return 0; | |
dd3efc09 | 2242 | } |
fe8db0c5 | 2243 | |
0d411b7f YW |
2244 | static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
2245 | _cleanup_strv_free_ char **altnames = NULL; | |
0d411b7f YW |
2246 | int r; |
2247 | ||
2248 | assert(link); | |
2249 | assert(message); | |
2250 | ||
2251 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); | |
50df02a7 YW |
2252 | if (r == -ENODATA) |
2253 | /* The message does not have IFLA_PROP_LIST container attribute. It does not means the | |
2254 | * interface has no alternative name. */ | |
2255 | return 0; | |
2256 | if (r < 0) | |
0d411b7f YW |
2257 | return log_link_debug_errno(link, r, "rtnl: failed to read alternative names: %m"); |
2258 | ||
1b345c1e YW |
2259 | if (strv_equal(altnames, link->alternative_names)) |
2260 | return 0; | |
2261 | ||
0d411b7f YW |
2262 | STRV_FOREACH(n, link->alternative_names) |
2263 | hashmap_remove(link->manager->links_by_name, *n); | |
2264 | ||
2265 | strv_free_and_replace(link->alternative_names, altnames); | |
2266 | ||
2267 | STRV_FOREACH(n, link->alternative_names) { | |
2268 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); | |
2269 | if (r < 0) | |
2270 | return log_link_debug_errno(link, r, "Failed to manage link by its new alternative names: %m"); | |
2271 | } | |
2272 | ||
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | static int link_update_name(Link *link, sd_netlink_message *message) { | |
01afd0f7 | 2277 | char ifname_from_index[IF_NAMESIZE]; |
0d411b7f YW |
2278 | const char *ifname; |
2279 | int r; | |
2280 | ||
2281 | assert(link); | |
2282 | assert(message); | |
2283 | ||
2284 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname); | |
2285 | if (r == -ENODATA) | |
7802194a | 2286 | /* Hmm?? But ok. */ |
0d411b7f YW |
2287 | return 0; |
2288 | if (r < 0) | |
2289 | return log_link_debug_errno(link, r, "Failed to read interface name in RTM_NEWLINK message: %m"); | |
2290 | ||
2291 | if (streq(ifname, link->ifname)) | |
2292 | return 0; | |
2293 | ||
01afd0f7 YW |
2294 | r = format_ifname(link->ifindex, ifname_from_index); |
2295 | if (r < 0) | |
2296 | return log_link_debug_errno(link, r, "Could not get interface name for index %i.", link->ifindex); | |
176b8be1 YW |
2297 | |
2298 | if (!streq(ifname, ifname_from_index)) { | |
2299 | log_link_debug(link, "New interface name '%s' received from the kernel does not correspond " | |
2300 | "with the name currently configured on the actual interface '%s'. Ignoring.", | |
2301 | ifname, ifname_from_index); | |
2302 | return 0; | |
2303 | } | |
2304 | ||
0d411b7f YW |
2305 | log_link_info(link, "Interface name change detected, renamed to %s.", ifname); |
2306 | ||
2307 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
2308 | ||
2309 | r = free_and_strdup(&link->ifname, ifname); | |
2310 | if (r < 0) | |
2311 | return log_oom_debug(); | |
2312 | ||
2313 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, link->ifname, link); | |
2314 | if (r < 0) | |
2315 | return log_link_debug_errno(link, r, "Failed to manage link by its new name: %m"); | |
2316 | ||
54d1fdb2 YW |
2317 | if (link->dhcp_client) { |
2318 | r = sd_dhcp_client_set_ifname(link->dhcp_client, link->ifname); | |
2319 | if (r < 0) | |
2320 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP client: %m"); | |
2321 | } | |
2322 | ||
2323 | if (link->dhcp6_client) { | |
2324 | r = sd_dhcp6_client_set_ifname(link->dhcp6_client, link->ifname); | |
2325 | if (r < 0) | |
2326 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP6 client: %m"); | |
2327 | } | |
2328 | ||
2329 | if (link->ndisc) { | |
2330 | r = sd_ndisc_set_ifname(link->ndisc, link->ifname); | |
2331 | if (r < 0) | |
2332 | return log_link_debug_errno(link, r, "Failed to update interface name in NDisc: %m"); | |
2333 | } | |
2334 | ||
2335 | if (link->dhcp_server) { | |
2336 | r = sd_dhcp_server_set_ifname(link->dhcp_server, link->ifname); | |
2337 | if (r < 0) | |
2338 | return log_link_debug_errno(link, r, "Failed to update interface name in DHCP server: %m"); | |
2339 | } | |
2340 | ||
2341 | if (link->radv) { | |
2342 | r = sd_radv_set_ifname(link->radv, link->ifname); | |
2343 | if (r < 0) | |
2344 | return log_link_debug_errno(link, r, "Failed to update interface name in Router Advertisement: %m"); | |
2345 | } | |
2346 | ||
35778343 YW |
2347 | if (link->lldp_rx) { |
2348 | r = sd_lldp_rx_set_ifname(link->lldp_rx, link->ifname); | |
54d1fdb2 | 2349 | if (r < 0) |
c01b9b87 YW |
2350 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Rx: %m"); |
2351 | } | |
2352 | ||
2353 | if (link->lldp_tx) { | |
2354 | r = sd_lldp_tx_set_ifname(link->lldp_tx, link->ifname); | |
2355 | if (r < 0) | |
2356 | return log_link_debug_errno(link, r, "Failed to update interface name in LLDP Tx: %m"); | |
54d1fdb2 YW |
2357 | } |
2358 | ||
2359 | if (link->ipv4ll) { | |
2360 | r = sd_ipv4ll_set_ifname(link->ipv4ll, link->ifname); | |
2361 | if (r < 0) | |
2362 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4LL client: %m"); | |
2363 | } | |
2364 | ||
86173383 YW |
2365 | r = ipv4acd_set_ifname(link); |
2366 | if (r < 0) | |
2367 | return log_link_debug_errno(link, r, "Failed to update interface name in IPv4ACD client: %m"); | |
54d1fdb2 | 2368 | |
0d411b7f YW |
2369 | return 0; |
2370 | } | |
2371 | ||
2372 | static int link_update(Link *link, sd_netlink_message *message) { | |
2373 | int r; | |
2374 | ||
2375 | assert(link); | |
2376 | assert(message); | |
2377 | ||
2378 | r = link_update_name(link, message); | |
2379 | if (r < 0) | |
2380 | return r; | |
2381 | ||
2382 | r = link_update_alternative_names(link, message); | |
2383 | if (r < 0) | |
2384 | return r; | |
2385 | ||
2386 | r = link_update_mtu(link, message); | |
2387 | if (r < 0) | |
2388 | return r; | |
2389 | ||
e1658632 YW |
2390 | r = link_update_driver(link, message); |
2391 | if (r < 0) | |
2392 | return r; | |
2393 | ||
2394 | r = link_update_permanent_hardware_address(link, message); | |
2395 | if (r < 0) | |
2396 | return r; | |
2397 | ||
0d411b7f YW |
2398 | r = link_update_hardware_address(link, message); |
2399 | if (r < 0) | |
2400 | return r; | |
2401 | ||
2402 | r = link_update_master(link, message); | |
2403 | if (r < 0) | |
2404 | return r; | |
2405 | ||
7d0d832d YW |
2406 | r = link_update_ipv6ll_addrgen_mode(link, message); |
2407 | if (r < 0) | |
2408 | return r; | |
2409 | ||
0d411b7f YW |
2410 | return link_update_flags(link, message); |
2411 | } | |
2412 | ||
0c9ee5d5 YW |
2413 | static Link *link_drop_or_unref(Link *link) { |
2414 | if (!link) | |
2415 | return NULL; | |
2416 | if (!link->manager) | |
2417 | return link_unref(link); | |
2418 | return link_drop(link); | |
2419 | } | |
2420 | ||
2421 | DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); | |
2422 | ||
2423 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
0d411b7f | 2424 | _cleanup_free_ char *ifname = NULL, *kind = NULL, *state_file = NULL, *lease_file = NULL, *lldp_file = NULL; |
0c9ee5d5 | 2425 | _cleanup_(link_drop_or_unrefp) Link *link = NULL; |
0c9ee5d5 YW |
2426 | unsigned short iftype; |
2427 | int r, ifindex; | |
0c9ee5d5 YW |
2428 | |
2429 | assert(manager); | |
2430 | assert(message); | |
2431 | assert(ret); | |
2432 | ||
0c9ee5d5 YW |
2433 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
2434 | if (r < 0) | |
0d411b7f | 2435 | return log_debug_errno(r, "rtnl: failed to read ifindex from link message: %m"); |
0c9ee5d5 | 2436 | else if (ifindex <= 0) |
0d411b7f | 2437 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "rtnl: received link message without valid ifindex."); |
0c9ee5d5 YW |
2438 | |
2439 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
2440 | if (r < 0) | |
0d411b7f | 2441 | return log_debug_errno(r, "rtnl: failed to read interface type from link message: %m"); |
0c9ee5d5 YW |
2442 | |
2443 | r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); | |
2444 | if (r < 0) | |
0d411b7f | 2445 | return log_debug_errno(r, "rtnl: failed to read interface name from link message: %m"); |
0c9ee5d5 YW |
2446 | |
2447 | /* check for link kind */ | |
2448 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
2449 | if (r >= 0) { | |
0d411b7f YW |
2450 | r = sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); |
2451 | if (r < 0 && r != -ENODATA) | |
2452 | return log_debug_errno(r, "rtnl: failed to read interface kind from link message: %m"); | |
0c9ee5d5 YW |
2453 | r = sd_netlink_message_exit_container(message); |
2454 | if (r < 0) | |
0d411b7f | 2455 | return log_debug_errno(r, "rtnl: failed to exit IFLA_LINKINFO container: %m"); |
0c9ee5d5 YW |
2456 | } |
2457 | ||
4c78dc17 YW |
2458 | if (!manager->test_mode) { |
2459 | /* Do not update state files when running in test mode. */ | |
2460 | if (asprintf(&state_file, "/run/systemd/netif/links/%d", ifindex) < 0) | |
2461 | return log_oom_debug(); | |
0d411b7f | 2462 | |
4c78dc17 YW |
2463 | if (asprintf(&lease_file, "/run/systemd/netif/leases/%d", ifindex) < 0) |
2464 | return log_oom_debug(); | |
0d411b7f | 2465 | |
4c78dc17 YW |
2466 | if (asprintf(&lldp_file, "/run/systemd/netif/lldp/%d", ifindex) < 0) |
2467 | return log_oom_debug(); | |
2468 | } | |
0d411b7f | 2469 | |
0c9ee5d5 YW |
2470 | link = new(Link, 1); |
2471 | if (!link) | |
2472 | return -ENOMEM; | |
2473 | ||
2474 | *link = (Link) { | |
2475 | .n_ref = 1, | |
2476 | .state = LINK_STATE_PENDING, | |
2477 | .online_state = _LINK_ONLINE_STATE_INVALID, | |
2478 | .ifindex = ifindex, | |
2479 | .iftype = iftype, | |
2480 | .ifname = TAKE_PTR(ifname), | |
2481 | .kind = TAKE_PTR(kind), | |
2482 | ||
7d0d832d YW |
2483 | .ipv6ll_address_gen_mode = _IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_INVALID, |
2484 | ||
0d411b7f YW |
2485 | .state_file = TAKE_PTR(state_file), |
2486 | .lease_file = TAKE_PTR(lease_file), | |
2487 | .lldp_file = TAKE_PTR(lldp_file), | |
2488 | ||
0c9ee5d5 YW |
2489 | .n_dns = UINT_MAX, |
2490 | .dns_default_route = -1, | |
2491 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
2492 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
2493 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
2494 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
2495 | }; | |
2496 | ||
6eab614d | 2497 | r = hashmap_ensure_put(&manager->links_by_index, NULL, INT_TO_PTR(link->ifindex), link); |
0c9ee5d5 | 2498 | if (r < 0) |
0d411b7f | 2499 | return log_link_debug_errno(link, r, "Failed to store link into manager: %m"); |
0c9ee5d5 YW |
2500 | |
2501 | link->manager = manager; | |
2502 | ||
0d411b7f | 2503 | r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
0c9ee5d5 | 2504 | if (r < 0) |
0d411b7f | 2505 | return log_link_debug_errno(link, r, "Failed to manage link by its interface name: %m"); |
0c9ee5d5 | 2506 | |
8a77e245 YW |
2507 | log_link_debug(link, "Saved new link: ifindex=%i, iftype=%s(%u), kind=%s", |
2508 | link->ifindex, strna(arphrd_to_name(link->iftype)), link->iftype, strna(link->kind)); | |
2509 | ||
0c9ee5d5 | 2510 | *ret = TAKE_PTR(link); |
0c9ee5d5 YW |
2511 | return 0; |
2512 | } | |
2513 | ||
0d411b7f | 2514 | int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *manager) { |
3be9d62a YW |
2515 | Link *link = NULL; |
2516 | NetDev *netdev = NULL; | |
2517 | uint16_t type; | |
2518 | const char *name; | |
2519 | int r, ifindex; | |
2520 | ||
2521 | assert(rtnl); | |
2522 | assert(message); | |
0d411b7f | 2523 | assert(manager); |
3be9d62a YW |
2524 | |
2525 | if (sd_netlink_message_is_error(message)) { | |
2526 | r = sd_netlink_message_get_errno(message); | |
2527 | if (r < 0) | |
2528 | log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); | |
2529 | ||
2530 | return 0; | |
2531 | } | |
2532 | ||
2533 | r = sd_netlink_message_get_type(message, &type); | |
2534 | if (r < 0) { | |
2535 | log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); | |
2536 | return 0; | |
2537 | } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { | |
2538 | log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); | |
2539 | return 0; | |
2540 | } | |
2541 | ||
2542 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
2543 | if (r < 0) { | |
2544 | log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); | |
2545 | return 0; | |
2546 | } else if (ifindex <= 0) { | |
2547 | log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); | |
2548 | return 0; | |
2549 | } | |
2550 | ||
2551 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
2552 | if (r < 0) { | |
2553 | log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); | |
2554 | return 0; | |
2555 | } | |
2556 | ||
6eab614d | 2557 | (void) link_get_by_index(manager, ifindex, &link); |
0d411b7f | 2558 | (void) netdev_get(manager, name, &netdev); |
3be9d62a YW |
2559 | |
2560 | switch (type) { | |
2561 | case RTM_NEWLINK: | |
0d411b7f YW |
2562 | if (netdev) { |
2563 | /* netdev exists, so make sure the ifindex matches */ | |
2564 | r = netdev_set_ifindex(netdev, message); | |
2565 | if (r < 0) { | |
66141164 | 2566 | log_netdev_warning_errno(netdev, r, "Could not process new link message for netdev, ignoring: %m"); |
0d411b7f YW |
2567 | return 0; |
2568 | } | |
2569 | } | |
2570 | ||
3be9d62a YW |
2571 | if (!link) { |
2572 | /* link is new, so add it */ | |
0d411b7f | 2573 | r = link_new(manager, message, &link); |
3be9d62a | 2574 | if (r < 0) { |
0d411b7f | 2575 | log_warning_errno(r, "Could not process new link message: %m"); |
3be9d62a YW |
2576 | return 0; |
2577 | } | |
3be9d62a | 2578 | |
0d411b7f | 2579 | r = link_update(link, message); |
3be9d62a | 2580 | if (r < 0) { |
66141164 | 2581 | log_link_warning_errno(link, r, "Could not process link message: %m"); |
0d411b7f | 2582 | link_enter_failed(link); |
3be9d62a YW |
2583 | return 0; |
2584 | } | |
3be9d62a | 2585 | |
0d411b7f YW |
2586 | r = link_check_initialized(link); |
2587 | if (r < 0) { | |
66141164 | 2588 | log_link_warning_errno(link, r, "Failed to check link is initialized: %m"); |
0d411b7f YW |
2589 | link_enter_failed(link); |
2590 | return 0; | |
2591 | } | |
2592 | } else { | |
2593 | r = link_update(link, message); | |
2594 | if (r < 0) { | |
66141164 | 2595 | log_link_warning_errno(link, r, "Could not process link message: %m"); |
0d411b7f YW |
2596 | link_enter_failed(link); |
2597 | return 0; | |
2598 | } | |
3be9d62a | 2599 | } |
3be9d62a YW |
2600 | break; |
2601 | ||
2602 | case RTM_DELLINK: | |
2603 | link_drop(link); | |
2604 | netdev_drop(netdev); | |
3be9d62a YW |
2605 | break; |
2606 | ||
2607 | default: | |
04499a70 | 2608 | assert_not_reached(); |
3be9d62a YW |
2609 | } |
2610 | ||
2611 | return 1; | |
2612 | } | |
2613 | ||
79c6e114 YW |
2614 | int link_getlink_handler_internal(sd_netlink *rtnl, sd_netlink_message *m, Link *link, const char *error_msg) { |
2615 | uint16_t message_type; | |
2616 | int r; | |
2617 | ||
2618 | assert(m); | |
2619 | assert(link); | |
2620 | assert(error_msg); | |
2621 | ||
2622 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
2623 | return 0; | |
2624 | ||
2625 | r = sd_netlink_message_get_errno(m); | |
2626 | if (r < 0) { | |
2627 | log_link_message_warning_errno(link, m, r, error_msg); | |
2628 | link_enter_failed(link); | |
2629 | return 0; | |
2630 | } | |
2631 | ||
2632 | r = sd_netlink_message_get_type(m, &message_type); | |
2633 | if (r < 0) { | |
2634 | log_link_debug_errno(link, r, "rtnl: failed to read link message type, ignoring: %m"); | |
2635 | return 0; | |
2636 | } | |
2637 | if (message_type != RTM_NEWLINK) { | |
2638 | log_link_debug(link, "rtnl: received invalid link message type, ignoring."); | |
2639 | return 0; | |
2640 | } | |
2641 | ||
2642 | r = link_update(link, m); | |
2643 | if (r < 0) { | |
2644 | link_enter_failed(link); | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | return 1; | |
2649 | } | |
2650 | ||
2651 | int link_call_getlink(Link *link, link_netlink_message_handler_t callback) { | |
2652 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2653 | int r; | |
2654 | ||
2655 | assert(link); | |
2656 | assert(link->manager); | |
2657 | assert(link->manager->rtnl); | |
2658 | assert(callback); | |
2659 | ||
2660 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, link->ifindex); | |
2661 | if (r < 0) | |
2662 | return r; | |
2663 | ||
2664 | r = netlink_call_async(link->manager->rtnl, NULL, req, callback, | |
2665 | link_netlink_destroy_callback, link); | |
2666 | if (r < 0) | |
2667 | return r; | |
2668 | ||
2669 | link_ref(link); | |
2670 | return 0; | |
2671 | } | |
2672 | ||
fe8db0c5 | 2673 | static const char* const link_state_table[_LINK_STATE_MAX] = { |
0580badc | 2674 | [LINK_STATE_PENDING] = "pending", |
bd08ce56 | 2675 | [LINK_STATE_INITIALIZED] = "initialized", |
289e6774 | 2676 | [LINK_STATE_CONFIGURING] = "configuring", |
0580badc ZJS |
2677 | [LINK_STATE_CONFIGURED] = "configured", |
2678 | [LINK_STATE_UNMANAGED] = "unmanaged", | |
2679 | [LINK_STATE_FAILED] = "failed", | |
2680 | [LINK_STATE_LINGER] = "linger", | |
fe8db0c5 TG |
2681 | }; |
2682 | ||
2683 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); | |
7ae55b78 YW |
2684 | |
2685 | int link_flags_to_string_alloc(uint32_t flags, char **ret) { | |
2686 | _cleanup_free_ char *str = NULL; | |
19aa7eeb ZJS |
2687 | static const char* map[] = { |
2688 | [LOG2U(IFF_UP)] = "up", /* interface is up. */ | |
2689 | [LOG2U(IFF_BROADCAST)] = "broadcast", /* broadcast address valid.*/ | |
2690 | [LOG2U(IFF_DEBUG)] = "debug", /* turn on debugging. */ | |
2691 | [LOG2U(IFF_LOOPBACK)] = "loopback", /* interface is a loopback net. */ | |
2692 | [LOG2U(IFF_POINTOPOINT)] = "point-to-point", /* interface has p-p link. */ | |
2693 | [LOG2U(IFF_NOTRAILERS)] = "no-trailers", /* avoid use of trailers. */ | |
2694 | [LOG2U(IFF_RUNNING)] = "running", /* interface RFC2863 OPER_UP. */ | |
2695 | [LOG2U(IFF_NOARP)] = "no-arp", /* no ARP protocol. */ | |
2696 | [LOG2U(IFF_PROMISC)] = "promiscuous", /* receive all packets. */ | |
2697 | [LOG2U(IFF_ALLMULTI)] = "all-multicast", /* receive all multicast packets. */ | |
2698 | [LOG2U(IFF_MASTER)] = "master", /* master of a load balancer. */ | |
2699 | [LOG2U(IFF_SLAVE)] = "slave", /* slave of a load balancer. */ | |
2700 | [LOG2U(IFF_MULTICAST)] = "multicast", /* supports multicast.*/ | |
2701 | [LOG2U(IFF_PORTSEL)] = "portsel", /* can set media type. */ | |
2702 | [LOG2U(IFF_AUTOMEDIA)] = "auto-media", /* auto media select active. */ | |
2703 | [LOG2U(IFF_DYNAMIC)] = "dynamic", /* dialup device with changing addresses. */ | |
2704 | [LOG2U(IFF_LOWER_UP)] = "lower-up", /* driver signals L1 up. */ | |
2705 | [LOG2U(IFF_DORMANT)] = "dormant", /* driver signals dormant. */ | |
2706 | [LOG2U(IFF_ECHO)] = "echo", /* echo sent packets. */ | |
7ae55b78 YW |
2707 | }; |
2708 | ||
2709 | assert(ret); | |
2710 | ||
2711 | for (size_t i = 0; i < ELEMENTSOF(map); i++) | |
19aa7eeb ZJS |
2712 | if (FLAGS_SET(flags, 1 << i) && map[i]) |
2713 | if (!strextend_with_separator(&str, ",", map[i])) | |
2714 | return -ENOMEM; | |
7ae55b78 YW |
2715 | |
2716 | *ret = TAKE_PTR(str); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
2720 | static const char * const kernel_operstate_table[] = { | |
2721 | [IF_OPER_UNKNOWN] = "unknown", | |
2722 | [IF_OPER_NOTPRESENT] = "not-present", | |
2723 | [IF_OPER_DOWN] = "down", | |
2724 | [IF_OPER_LOWERLAYERDOWN] = "lower-layer-down", | |
2725 | [IF_OPER_TESTING] = "testing", | |
2726 | [IF_OPER_DORMANT] = "dormant", | |
2727 | [IF_OPER_UP] = "up", | |
2728 | }; | |
2729 | ||
2730 | DEFINE_STRING_TABLE_LOOKUP_TO_STRING(kernel_operstate, int); |