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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
f579559b | 2 | |
9aa5d8ba | 3 | #include <netinet/in.h> |
f579559b | 4 | #include <linux/if.h> |
8f815e8b | 5 | #include <linux/if_arp.h> |
518cd6b5 | 6 | #include <linux/if_link.h> |
8430841b | 7 | #include <sys/socket.h> |
4cc7a82c | 8 | #include <unistd.h> |
f579559b | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
c0267a59 | 11 | #include "batadv.h" |
737f1405 YW |
12 | #include "bond.h" |
13 | #include "bridge.h" | |
1346b1f0 | 14 | #include "bus-util.h" |
3be9d62a YW |
15 | #include "device-private.h" |
16 | #include "device-util.h" | |
27dfc982 | 17 | #include "dhcp-identifier.h" |
bd91b83e | 18 | #include "dhcp-lease-internal.h" |
686d13b9 | 19 | #include "env-file.h" |
4bb7cc82 | 20 | #include "ethtool-util.h" |
3ffd4af2 | 21 | #include "fd-util.h" |
cf1d700d | 22 | #include "fileio.h" |
af664001 | 23 | #include "fs-util.h" |
737f1405 | 24 | #include "ipvlan.h" |
ef118d00 | 25 | #include "missing_network.h" |
cf1d700d | 26 | #include "netlink-util.h" |
c6f7c917 | 27 | #include "network-internal.h" |
fb486c90 | 28 | #include "networkd-address-label.h" |
093e3533 | 29 | #include "networkd-address.h" |
9671ae9d | 30 | #include "networkd-bridge-fdb.h" |
3ddcbeea | 31 | #include "networkd-can.h" |
8fcf1d61 | 32 | #include "networkd-dhcp-server.h" |
ca5ad760 YW |
33 | #include "networkd-dhcp4.h" |
34 | #include "networkd-dhcp6.h" | |
35 | #include "networkd-ipv4ll.h" | |
76c5a0f2 | 36 | #include "networkd-ipv6-proxy-ndp.h" |
6a1af3d4 YW |
37 | #include "networkd-link-bus.h" |
38 | #include "networkd-link.h" | |
8e1ad1ea | 39 | #include "networkd-lldp-tx.h" |
23f53b99 | 40 | #include "networkd-manager.h" |
dbf63196 | 41 | #include "networkd-mdb.h" |
1e7a0e21 | 42 | #include "networkd-ndisc.h" |
e4a71bf3 | 43 | #include "networkd-neighbor.h" |
75156ccb | 44 | #include "networkd-nexthop.h" |
19d9a5ad | 45 | #include "networkd-queue.h" |
7465dd22 | 46 | #include "networkd-radv.h" |
bce67bbe | 47 | #include "networkd-routing-policy-rule.h" |
19d9a5ad | 48 | #include "networkd-sriov.h" |
3b5a4fc6 | 49 | #include "networkd-state-file.h" |
19d9a5ad | 50 | #include "networkd-sysctl.h" |
8d968fdd | 51 | #include "networkd-wifi.h" |
cf1d700d TG |
52 | #include "set.h" |
53 | #include "socket-util.h" | |
bf331d87 | 54 | #include "stat-util.h" |
15a5e950 | 55 | #include "stdio-util.h" |
8b43440b | 56 | #include "string-table.h" |
51517f9e | 57 | #include "strv.h" |
62e021a9 | 58 | #include "sysctl-util.h" |
34658df2 | 59 | #include "tc.h" |
e4de7287 | 60 | #include "tmpfile-util.h" |
299ad32d | 61 | #include "udev-util.h" |
cf1d700d | 62 | #include "util.h" |
737f1405 | 63 | #include "vrf.h" |
fc2f9534 | 64 | |
3ca1fab7 | 65 | bool link_ipv4ll_enabled(Link *link) { |
b9d74c40 LP |
66 | assert(link); |
67 | ||
78c958f8 TG |
68 | if (link->flags & IFF_LOOPBACK) |
69 | return false; | |
70 | ||
71 | if (!link->network) | |
72 | return false; | |
73 | ||
500b96eb | 74 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
75 | return false; |
76 | ||
98d20a17 | 77 | if (STRPTR_IN_SET(link->kind, |
78 | "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti", | |
b0486c73 | 79 | "vti6", "nlmon", "xfrm", "bareudp")) |
a8f5bba6 JD |
80 | return false; |
81 | ||
f410d463 YW |
82 | /* L3 or L3S mode do not support ARP. */ |
83 | if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S)) | |
84 | return false; | |
85 | ||
f2bfcdb9 YW |
86 | if (link->network->bond) |
87 | return false; | |
88 | ||
3ca1fab7 | 89 | return link->network->link_local & ADDRESS_FAMILY_IPV4; |
8bc17bb3 SS |
90 | } |
91 | ||
f8f2f880 | 92 | bool link_ipv6ll_enabled(Link *link) { |
b9d74c40 LP |
93 | assert(link); |
94 | ||
fa709992 LP |
95 | if (!socket_ipv6_is_supported()) |
96 | return false; | |
97 | ||
d0d6a4cd TG |
98 | if (link->flags & IFF_LOOPBACK) |
99 | return false; | |
100 | ||
101 | if (!link->network) | |
102 | return false; | |
103 | ||
500b96eb | 104 | if (link->iftype == ARPHRD_CAN) |
c6ac3729 YW |
105 | return false; |
106 | ||
107 | if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon")) | |
a8f5bba6 JD |
108 | return false; |
109 | ||
f2bfcdb9 YW |
110 | if (link->network->bond) |
111 | return false; | |
112 | ||
e0ee46f2 | 113 | return link->network->link_local & ADDRESS_FAMILY_IPV6; |
78c958f8 TG |
114 | } |
115 | ||
5e0534f1 | 116 | bool link_ipv6_enabled(Link *link) { |
439689c6 SS |
117 | assert(link); |
118 | ||
119 | if (!socket_ipv6_is_supported()) | |
120 | return false; | |
121 | ||
b102cdca | 122 | if (link->network->bond) |
2b00a4e0 TY |
123 | return false; |
124 | ||
500b96eb | 125 | if (link->iftype == ARPHRD_CAN) |
af9ba57a YW |
126 | return false; |
127 | ||
4cef7fe3 | 128 | /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */ |
adfeee49 YW |
129 | if (link_ipv6ll_enabled(link)) |
130 | return true; | |
131 | ||
132 | if (network_has_static_ipv6_configurations(link->network)) | |
133 | return true; | |
134 | ||
135 | return false; | |
439689c6 SS |
136 | } |
137 | ||
7191a57a YW |
138 | bool link_is_ready_to_configure(Link *link, bool allow_unmanaged) { |
139 | assert(link); | |
140 | ||
8e4b1b35 | 141 | if (!link->network) { |
7191a57a YW |
142 | if (!allow_unmanaged) |
143 | return false; | |
144 | ||
145 | return link_has_carrier(link); | |
146 | } | |
147 | ||
148 | if (!IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) | |
149 | return false; | |
150 | ||
151 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) | |
152 | return false; | |
153 | ||
154 | return true; | |
155 | } | |
156 | ||
34bf3c00 YW |
157 | static bool link_is_enslaved(Link *link) { |
158 | if (link->flags & IFF_SLAVE) | |
159 | /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */ | |
160 | return true; | |
161 | ||
34bf3c00 YW |
162 | if (!link->network) |
163 | return false; | |
164 | ||
bb262ef0 | 165 | if (link->master_ifindex > 0 && link->network->bridge) |
34bf3c00 YW |
166 | return true; |
167 | ||
bb262ef0 YW |
168 | /* TODO: add conditions for other netdevs. */ |
169 | ||
34bf3c00 YW |
170 | return false; |
171 | } | |
172 | ||
45e11abf YW |
173 | static void link_update_master_operstate(Link *link, NetDev *netdev) { |
174 | Link *master; | |
175 | ||
176 | if (!netdev) | |
177 | return; | |
178 | ||
7936917e YW |
179 | if (netdev->ifindex <= 0) |
180 | return; | |
181 | ||
e8f99f4e YW |
182 | /* If an interface is self-mentioned in Bridge= or friends, then it introduces an infinite loop. |
183 | * FIXME: there still exits a possibility of an infinite loop when two or more interfaces | |
184 | * mention each other in Bridge= or so. We need to detect such a loop. */ | |
185 | if (link->ifindex == netdev->ifindex) | |
186 | return; | |
187 | ||
45e11abf YW |
188 | if (link_get(link->manager, netdev->ifindex, &master) < 0) |
189 | return; | |
190 | ||
191 | link_update_operstate(master, true); | |
192 | } | |
193 | ||
8430841b L |
194 | static LinkAddressState address_state_from_scope(uint8_t scope) { |
195 | if (scope < RT_SCOPE_SITE) | |
196 | /* universally accessible addresses found */ | |
197 | return LINK_ADDRESS_STATE_ROUTABLE; | |
198 | ||
199 | if (scope < RT_SCOPE_HOST) | |
200 | /* only link or site local addresses found */ | |
201 | return LINK_ADDRESS_STATE_DEGRADED; | |
202 | ||
203 | /* no useful addresses found */ | |
204 | return LINK_ADDRESS_STATE_OFF; | |
205 | } | |
206 | ||
45e11abf | 207 | void link_update_operstate(Link *link, bool also_update_master) { |
84de38c5 | 208 | LinkOperationalState operstate; |
1678fbb3 | 209 | LinkCarrierState carrier_state; |
8430841b | 210 | LinkAddressState ipv4_address_state, ipv6_address_state, address_state; |
bcdcc596 | 211 | LinkOnlineState online_state; |
35c5a9ca | 212 | _cleanup_strv_free_ char **p = NULL; |
90afec18 | 213 | uint8_t ipv4_scope = RT_SCOPE_NOWHERE, ipv6_scope = RT_SCOPE_NOWHERE; |
35c5a9ca | 214 | bool changed = false; |
1678fbb3 | 215 | Address *address; |
14153d1b | 216 | |
84de38c5 TG |
217 | assert(link); |
218 | ||
219 | if (link->kernel_operstate == IF_OPER_DORMANT) | |
1678fbb3 | 220 | carrier_state = LINK_CARRIER_STATE_DORMANT; |
84de38c5 | 221 | else if (link_has_carrier(link)) { |
1678fbb3 YW |
222 | if (link_is_enslaved(link)) |
223 | carrier_state = LINK_CARRIER_STATE_ENSLAVED; | |
84de38c5 | 224 | else |
1678fbb3 | 225 | carrier_state = LINK_CARRIER_STATE_CARRIER; |
84de38c5 | 226 | } else if (link->flags & IFF_UP) |
1678fbb3 | 227 | carrier_state = LINK_CARRIER_STATE_NO_CARRIER; |
84de38c5 | 228 | else |
1678fbb3 | 229 | carrier_state = LINK_CARRIER_STATE_OFF; |
84de38c5 | 230 | |
1678fbb3 | 231 | if (carrier_state >= LINK_CARRIER_STATE_CARRIER) { |
959f65d3 YW |
232 | Link *slave; |
233 | ||
90e74a66 | 234 | SET_FOREACH(slave, link->slaves) { |
959f65d3 | 235 | link_update_operstate(slave, false); |
84de38c5 | 236 | |
1678fbb3 YW |
237 | if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER) |
238 | carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER; | |
84de38c5 | 239 | } |
959f65d3 | 240 | } |
84de38c5 | 241 | |
90e74a66 | 242 | SET_FOREACH(address, link->addresses) { |
1678fbb3 YW |
243 | if (!address_is_ready(address)) |
244 | continue; | |
84de38c5 | 245 | |
90afec18 YW |
246 | if (address->family == AF_INET) |
247 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
8430841b | 248 | |
90afec18 YW |
249 | if (address->family == AF_INET6) |
250 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1678fbb3 | 251 | } |
84de38c5 | 252 | |
1678fbb3 | 253 | /* for operstate we also take foreign addresses into account */ |
90e74a66 | 254 | SET_FOREACH(address, link->addresses_foreign) { |
1678fbb3 YW |
255 | if (!address_is_ready(address)) |
256 | continue; | |
257 | ||
90afec18 YW |
258 | if (address->family == AF_INET) |
259 | ipv4_scope = MIN(ipv4_scope, address->scope); | |
8430841b | 260 | |
90afec18 YW |
261 | if (address->family == AF_INET6) |
262 | ipv6_scope = MIN(ipv6_scope, address->scope); | |
1678fbb3 YW |
263 | } |
264 | ||
8430841b L |
265 | ipv4_address_state = address_state_from_scope(ipv4_scope); |
266 | ipv6_address_state = address_state_from_scope(ipv6_scope); | |
90afec18 | 267 | address_state = address_state_from_scope(MIN(ipv4_scope, ipv6_scope)); |
1678fbb3 YW |
268 | |
269 | /* Mapping of address and carrier state vs operational state | |
270 | * carrier state | |
271 | * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
272 | * ------------------------------------------------------------------------------ | |
273 | * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved | |
274 | * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved | |
275 | * routable | off | no-carrier | dormant | degraded-carrier | routable | routable | |
276 | */ | |
84de38c5 | 277 | |
1678fbb3 YW |
278 | if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF) |
279 | operstate = (LinkOperationalState) carrier_state; | |
280 | else if (address_state == LINK_ADDRESS_STATE_ROUTABLE) | |
281 | operstate = LINK_OPERSTATE_ROUTABLE; | |
282 | else if (carrier_state == LINK_CARRIER_STATE_CARRIER) | |
283 | operstate = LINK_OPERSTATE_DEGRADED; | |
284 | else | |
14153d1b YW |
285 | operstate = LINK_OPERSTATE_ENSLAVED; |
286 | ||
bcdcc596 AÅ |
287 | /* Only determine online state for managed links with RequiredForOnline=yes */ |
288 | if (!link->network || !link->network->required_for_online) | |
289 | online_state = _LINK_ONLINE_STATE_INVALID; | |
290 | else if (operstate < link->network->required_operstate_for_online.min || | |
291 | operstate > link->network->required_operstate_for_online.max) | |
292 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
293 | else { | |
294 | AddressFamily required_family = link->network->required_family_for_online; | |
295 | bool needs_ipv4 = required_family & ADDRESS_FAMILY_IPV4; | |
296 | bool needs_ipv6 = required_family & ADDRESS_FAMILY_IPV6; | |
297 | ||
298 | /* The operational state is within the range required for online. | |
299 | * If a particular address family is also required, we might revert | |
300 | * to offline in the blocks below. | |
301 | */ | |
302 | online_state = LINK_ONLINE_STATE_ONLINE; | |
303 | ||
304 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_DEGRADED) { | |
305 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
306 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
307 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_DEGRADED) | |
308 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
309 | } | |
310 | ||
311 | if (link->network->required_operstate_for_online.min >= LINK_OPERSTATE_ROUTABLE) { | |
312 | if (needs_ipv4 && ipv4_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
313 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
314 | if (needs_ipv6 && ipv6_address_state < LINK_ADDRESS_STATE_ROUTABLE) | |
315 | online_state = LINK_ONLINE_STATE_OFFLINE; | |
316 | } | |
317 | } | |
318 | ||
35c5a9ca YW |
319 | if (link->carrier_state != carrier_state) { |
320 | link->carrier_state = carrier_state; | |
321 | changed = true; | |
322 | if (strv_extend(&p, "CarrierState") < 0) | |
323 | log_oom(); | |
324 | } | |
959f65d3 | 325 | |
35c5a9ca YW |
326 | if (link->address_state != address_state) { |
327 | link->address_state = address_state; | |
328 | changed = true; | |
329 | if (strv_extend(&p, "AddressState") < 0) | |
330 | log_oom(); | |
959f65d3 YW |
331 | } |
332 | ||
8430841b L |
333 | if (link->ipv4_address_state != ipv4_address_state) { |
334 | link->ipv4_address_state = ipv4_address_state; | |
335 | changed = true; | |
336 | if (strv_extend(&p, "IPv4AddressState") < 0) | |
337 | log_oom(); | |
338 | } | |
339 | ||
340 | if (link->ipv6_address_state != ipv6_address_state) { | |
341 | link->ipv6_address_state = ipv6_address_state; | |
342 | changed = true; | |
343 | if (strv_extend(&p, "IPv6AddressState") < 0) | |
344 | log_oom(); | |
345 | } | |
346 | ||
84de38c5 TG |
347 | if (link->operstate != operstate) { |
348 | link->operstate = operstate; | |
35c5a9ca YW |
349 | changed = true; |
350 | if (strv_extend(&p, "OperationalState") < 0) | |
351 | log_oom(); | |
84de38c5 | 352 | } |
959f65d3 | 353 | |
bcdcc596 AÅ |
354 | if (link->online_state != online_state) { |
355 | link->online_state = online_state; | |
356 | changed = true; | |
357 | if (strv_extend(&p, "OnlineState") < 0) | |
358 | log_oom(); | |
359 | } | |
360 | ||
35c5a9ca YW |
361 | if (p) |
362 | link_send_changed_strv(link, p); | |
363 | if (changed) | |
364 | link_dirty(link); | |
365 | ||
45e11abf | 366 | if (also_update_master && link->network) { |
c0267a59 | 367 | link_update_master_operstate(link, link->network->batadv); |
45e11abf YW |
368 | link_update_master_operstate(link, link->network->bond); |
369 | link_update_master_operstate(link, link->network->bridge); | |
959f65d3 | 370 | } |
84de38c5 TG |
371 | } |
372 | ||
51d18171 TG |
373 | #define FLAG_STRING(string, flag, old, new) \ |
374 | (((old ^ new) & flag) \ | |
375 | ? ((old & flag) ? (" -" string) : (" +" string)) \ | |
376 | : "") | |
377 | ||
bb262ef0 | 378 | static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) { |
51d18171 TG |
379 | unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; |
380 | uint8_t operstate; | |
381 | int r; | |
382 | ||
383 | assert(link); | |
384 | ||
385 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
6a7a4e4d LP |
386 | if (r < 0) |
387 | return log_link_warning_errno(link, r, "Could not get link flags: %m"); | |
51d18171 | 388 | |
1c4baffc | 389 | r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate); |
51d18171 TG |
390 | if (r < 0) |
391 | /* if we got a message without operstate, take it to mean | |
392 | the state was unchanged */ | |
393 | operstate = link->kernel_operstate; | |
394 | ||
bb262ef0 | 395 | if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate)) |
51d18171 TG |
396 | return 0; |
397 | ||
398 | if (link->flags != flags) { | |
6a7a4e4d | 399 | 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", |
51d18171 TG |
400 | FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), |
401 | FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), | |
402 | FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), | |
403 | FLAG_STRING("UP", IFF_UP, link->flags, flags), | |
404 | FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), | |
405 | FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), | |
406 | FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), | |
407 | FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), | |
408 | FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), | |
409 | FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), | |
410 | FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), | |
411 | FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), | |
412 | FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), | |
413 | FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), | |
414 | FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), | |
415 | FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), | |
416 | FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), | |
417 | FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), | |
418 | FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); | |
419 | ||
420 | unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | | |
421 | IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | | |
422 | IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | | |
423 | IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | | |
424 | IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | | |
425 | IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); | |
426 | unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); | |
427 | unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); | |
428 | ||
429 | /* link flags are currently at most 18 bits, let's align to | |
430 | * printing 20 */ | |
431 | if (unknown_flags_added) | |
79008bdd | 432 | log_link_debug(link, |
6a7a4e4d | 433 | "Unknown link flags gained: %#.5x (ignoring)", |
51d18171 TG |
434 | unknown_flags_added); |
435 | ||
436 | if (unknown_flags_removed) | |
79008bdd | 437 | log_link_debug(link, |
6a7a4e4d | 438 | "Unknown link flags lost: %#.5x (ignoring)", |
51d18171 TG |
439 | unknown_flags_removed); |
440 | } | |
441 | ||
442 | link->flags = flags; | |
443 | link->kernel_operstate = operstate; | |
444 | ||
959f65d3 | 445 | link_update_operstate(link, true); |
51d18171 TG |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
15761549 YW |
450 | void link_ntp_settings_clear(Link *link) { |
451 | link->ntp = strv_free(link->ntp); | |
452 | } | |
453 | ||
454 | void link_dns_settings_clear(Link *link) { | |
f5fbe71d | 455 | if (link->n_dns != UINT_MAX) |
e77bd3fd YW |
456 | for (unsigned i = 0; i < link->n_dns; i++) |
457 | in_addr_full_free(link->dns[i]); | |
15761549 | 458 | link->dns = mfree(link->dns); |
f5fbe71d | 459 | link->n_dns = UINT_MAX; |
15761549 | 460 | |
6e4571f0 YW |
461 | link->search_domains = ordered_set_free(link->search_domains); |
462 | link->route_domains = ordered_set_free(link->route_domains); | |
15761549 YW |
463 | |
464 | link->dns_default_route = -1; | |
465 | link->llmnr = _RESOLVE_SUPPORT_INVALID; | |
466 | link->mdns = _RESOLVE_SUPPORT_INVALID; | |
467 | link->dnssec_mode = _DNSSEC_MODE_INVALID; | |
468 | link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID; | |
469 | ||
470 | link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors); | |
471 | } | |
472 | ||
1a6bb31f YW |
473 | static void link_free_engines(Link *link) { |
474 | if (!link) | |
475 | return; | |
476 | ||
477 | link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server); | |
478 | link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client); | |
479 | link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease); | |
1c494872 | 480 | link->dhcp_acd = sd_ipv4acd_unref(link->dhcp_acd); |
1a6bb31f YW |
481 | |
482 | link->lldp = sd_lldp_unref(link->lldp); | |
1c494872 | 483 | link_lldp_emit_stop(link); |
1a6bb31f YW |
484 | |
485 | ndisc_flush(link); | |
486 | ||
487 | link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll); | |
488 | link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client); | |
1633c457 | 489 | link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease); |
1a6bb31f YW |
490 | link->ndisc = sd_ndisc_unref(link->ndisc); |
491 | link->radv = sd_radv_unref(link->radv); | |
7abe175c YW |
492 | |
493 | ipv4_dad_unref(link); | |
1a6bb31f YW |
494 | } |
495 | ||
8301aa0b | 496 | static Link *link_free(Link *link) { |
8301aa0b | 497 | assert(link); |
f579559b | 498 | |
15761549 YW |
499 | link_ntp_settings_clear(link); |
500 | link_dns_settings_clear(link); | |
501 | ||
8eec0b9d YW |
502 | link->routes = set_free(link->routes); |
503 | link->routes_foreign = set_free(link->routes_foreign); | |
6e537f62 YW |
504 | link->dhcp_routes = set_free(link->dhcp_routes); |
505 | link->dhcp_routes_old = set_free(link->dhcp_routes_old); | |
1633c457 YW |
506 | link->dhcp6_routes = set_free(link->dhcp6_routes); |
507 | link->dhcp6_routes_old = set_free(link->dhcp6_routes_old); | |
508 | link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes); | |
509 | link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old); | |
69203fba | 510 | link->ndisc_routes = set_free(link->ndisc_routes); |
adda1ed9 | 511 | |
8eec0b9d YW |
512 | link->nexthops = set_free(link->nexthops); |
513 | link->nexthops_foreign = set_free(link->nexthops_foreign); | |
c16c7808 | 514 | |
8eec0b9d YW |
515 | link->neighbors = set_free(link->neighbors); |
516 | link->neighbors_foreign = set_free(link->neighbors_foreign); | |
d1bdafd2 | 517 | |
8eec0b9d YW |
518 | link->addresses = set_free(link->addresses); |
519 | link->addresses_foreign = set_free(link->addresses_foreign); | |
aa651e88 | 520 | link->pool_addresses = set_free(link->pool_addresses); |
e5526518 | 521 | link->static_addresses = set_free(link->static_addresses); |
1633c457 YW |
522 | link->dhcp6_addresses = set_free(link->dhcp6_addresses); |
523 | link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old); | |
524 | link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses); | |
525 | link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old); | |
69203fba | 526 | link->ndisc_addresses = set_free(link->ndisc_addresses); |
adda1ed9 | 527 | |
4b409e85 YW |
528 | link->dhcp6_pd_prefixes = set_free(link->dhcp6_pd_prefixes); |
529 | ||
1a6bb31f | 530 | link_free_engines(link); |
49699bac | 531 | |
c166a070 | 532 | free(link->ifname); |
572b21d9 | 533 | strv_free(link->alternative_names); |
ceac4078 | 534 | free(link->kind); |
8d968fdd | 535 | free(link->ssid); |
c643bda5 | 536 | free(link->driver); |
6cad256d | 537 | |
a34e58d4 YW |
538 | unlink_and_free(link->lease_file); |
539 | unlink_and_free(link->lldp_file); | |
540 | unlink_and_free(link->state_file); | |
c166a070 | 541 | |
51517f9e | 542 | sd_device_unref(link->sd_device); |
b5db00e5 | 543 | |
0d4ad91d | 544 | hashmap_free(link->bound_to_links); |
0d4ad91d AR |
545 | hashmap_free(link->bound_by_links); |
546 | ||
5f707e12 | 547 | set_free_with_destructor(link->slaves, link_unref); |
033295c1 | 548 | |
c9c908a6 YW |
549 | network_unref(link->network); |
550 | ||
8301aa0b | 551 | return mfree(link); |
14b746f7 TG |
552 | } |
553 | ||
8301aa0b | 554 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free); |
14b746f7 | 555 | |
11a7f229 TG |
556 | int link_get(Manager *m, int ifindex, Link **ret) { |
557 | Link *link; | |
11a7f229 TG |
558 | |
559 | assert(m); | |
e856ed00 | 560 | assert(ifindex > 0); |
11a7f229 | 561 | |
ae06ab10 | 562 | link = hashmap_get(m->links, INT_TO_PTR(ifindex)); |
11a7f229 TG |
563 | if (!link) |
564 | return -ENODEV; | |
565 | ||
0b54c870 YW |
566 | if (ret) |
567 | *ret = link; | |
568 | return 0; | |
569 | } | |
570 | ||
571 | int link_get_by_name(Manager *m, const char *ifname, Link **ret) { | |
572 | Link *link; | |
573 | ||
574 | assert(m); | |
575 | assert(ifname); | |
11a7f229 | 576 | |
0b54c870 YW |
577 | link = hashmap_get(m->links_by_name, ifname); |
578 | if (!link) | |
579 | return -ENODEV; | |
580 | ||
581 | if (ret) | |
582 | *ret = link; | |
11a7f229 TG |
583 | return 0; |
584 | } | |
585 | ||
af9ba57a | 586 | void link_set_state(Link *link, LinkState state) { |
e331e246 TG |
587 | assert(link); |
588 | ||
589 | if (link->state == state) | |
590 | return; | |
591 | ||
0beb9542 YW |
592 | log_link_debug(link, "State changed: %s -> %s", |
593 | link_state_to_string(link->state), | |
594 | link_state_to_string(state)); | |
595 | ||
e331e246 TG |
596 | link->state = state; |
597 | ||
598 | link_send_changed(link, "AdministrativeState", NULL); | |
9092113d | 599 | link_dirty(link); |
e331e246 TG |
600 | } |
601 | ||
57bd6899 TG |
602 | static void link_enter_unmanaged(Link *link) { |
603 | assert(link); | |
604 | ||
e331e246 | 605 | link_set_state(link, LINK_STATE_UNMANAGED); |
57bd6899 TG |
606 | } |
607 | ||
2a99eed0 | 608 | int link_stop_engines(Link *link, bool may_keep_dhcp) { |
111bb8f9 TG |
609 | int r = 0, k; |
610 | ||
611 | assert(link); | |
612 | assert(link->manager); | |
613 | assert(link->manager->event); | |
614 | ||
80060352 ZJS |
615 | bool keep_dhcp = may_keep_dhcp && |
616 | link->network && | |
617 | (link->manager->restarting || | |
618 | FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP)); | |
619 | ||
84add3cd | 620 | if (!keep_dhcp) { |
111bb8f9 | 621 | k = sd_dhcp_client_stop(link->dhcp_client); |
6a7a4e4d | 622 | if (k < 0) |
36c7d709 | 623 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m"); |
111bb8f9 TG |
624 | } |
625 | ||
84add3cd YW |
626 | k = sd_ipv4acd_stop(link->dhcp_acd); |
627 | if (k < 0) | |
628 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client for DHCPv4: %m"); | |
a7df5cae | 629 | |
2a99eed0 YW |
630 | k = sd_dhcp_server_stop(link->dhcp_server); |
631 | if (k < 0) | |
632 | r = log_link_warning_errno(link, k, "Could not stop DHCPv4 server: %m"); | |
633 | ||
9cc65242 YW |
634 | k = sd_lldp_stop(link->lldp); |
635 | if (k < 0) | |
636 | r = log_link_warning_errno(link, k, "Could not stop LLDP: %m"); | |
637 | ||
84add3cd YW |
638 | k = sd_ipv4ll_stop(link->ipv4ll); |
639 | if (k < 0) | |
640 | r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m"); | |
dd43110f | 641 | |
490ccbd5 | 642 | k = ipv4_dad_stop(link); |
2488e4d9 YW |
643 | if (k < 0) |
644 | r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m"); | |
051e77ca | 645 | |
84add3cd YW |
646 | k = sd_dhcp6_client_stop(link->dhcp6_client); |
647 | if (k < 0) | |
648 | r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m"); | |
4138fb2c | 649 | |
2ffd6d73 YW |
650 | k = dhcp6_pd_remove(link); |
651 | if (k < 0) | |
652 | r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m"); | |
1633c457 | 653 | |
84add3cd YW |
654 | k = sd_ndisc_stop(link->ndisc); |
655 | if (k < 0) | |
656 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m"); | |
4138fb2c | 657 | |
84add3cd YW |
658 | k = sd_radv_stop(link->radv); |
659 | if (k < 0) | |
660 | r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m"); | |
7465dd22 | 661 | |
7272b25e | 662 | link_lldp_emit_stop(link); |
111bb8f9 TG |
663 | return r; |
664 | } | |
665 | ||
b22d8a00 | 666 | void link_enter_failed(Link *link) { |
ef1ba606 | 667 | assert(link); |
f882c247 | 668 | |
370e9930 | 669 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
2139694e TG |
670 | return; |
671 | ||
6a7a4e4d | 672 | log_link_warning(link, "Failed"); |
449f7554 | 673 | |
e331e246 | 674 | link_set_state(link, LINK_STATE_FAILED); |
fe8db0c5 | 675 | |
2a99eed0 | 676 | (void) link_stop_engines(link, false); |
f882c247 TG |
677 | } |
678 | ||
7033af49 YW |
679 | static int link_join_netdevs_after_configured(Link *link) { |
680 | NetDev *netdev; | |
7033af49 YW |
681 | int r; |
682 | ||
90e74a66 | 683 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
7033af49 YW |
684 | if (netdev->ifindex > 0) |
685 | /* Assume already enslaved. */ | |
686 | continue; | |
687 | ||
688 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED) | |
689 | continue; | |
690 | ||
691 | log_struct(LOG_DEBUG, | |
692 | LOG_LINK_INTERFACE(link), | |
693 | LOG_NETDEV_INTERFACE(netdev), | |
694 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); | |
695 | ||
696 | r = netdev_join(netdev, link, NULL); | |
697 | if (r < 0) | |
698 | return log_struct_errno(LOG_WARNING, r, | |
699 | LOG_LINK_INTERFACE(link), | |
700 | LOG_NETDEV_INTERFACE(netdev), | |
701 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); | |
702 | } | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
e3a7b048 | 707 | static void link_enter_configured(Link *link) { |
dd43110f TG |
708 | assert(link); |
709 | assert(link->network); | |
e3a7b048 | 710 | |
289e6774 | 711 | if (link->state != LINK_STATE_CONFIGURING) |
e3a7b048 | 712 | return; |
dd43110f | 713 | |
e331e246 | 714 | link_set_state(link, LINK_STATE_CONFIGURED); |
dd43110f | 715 | |
7033af49 | 716 | (void) link_join_netdevs_after_configured(link); |
dd43110f TG |
717 | } |
718 | ||
6accfd31 DA |
719 | void link_check_ready(Link *link) { |
720 | Address *a; | |
6accfd31 DA |
721 | |
722 | assert(link); | |
723 | ||
5f58af25 YW |
724 | if (link->state == LINK_STATE_CONFIGURED) |
725 | return; | |
726 | ||
d19b9939 YW |
727 | if (link->state != LINK_STATE_CONFIGURING) |
728 | return (void) log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state)); | |
6accfd31 DA |
729 | |
730 | if (!link->network) | |
731 | return; | |
732 | ||
600b7898 YW |
733 | if (link->iftype == ARPHRD_CAN) { |
734 | /* let's shortcut things for CAN which doesn't need most of checks below. */ | |
735 | if (!link->can_configured) | |
736 | return (void) log_link_debug(link, "%s(): CAN device is not configured.", __func__); | |
737 | ||
738 | link_enter_configured(link); | |
739 | return; | |
740 | } | |
741 | ||
76c5a0f2 | 742 | if (!link->static_addresses_configured) |
d19b9939 | 743 | return (void) log_link_debug(link, "%s(): static addresses are not configured.", __func__); |
6accfd31 | 744 | |
90e74a66 | 745 | SET_FOREACH(a, link->addresses) |
39373cb9 YW |
746 | if (!address_is_ready(a)) { |
747 | _cleanup_free_ char *str = NULL; | |
748 | ||
5380707a YW |
749 | (void) in_addr_prefix_to_string(a->family, &a->in_addr, a->prefixlen, &str); |
750 | return (void) log_link_debug(link, "%s(): an address %s is not ready.", __func__, strna(str)); | |
39373cb9 | 751 | } |
6aa5773b | 752 | |
e5b35bf6 YW |
753 | if (!link->static_bridge_fdb_configured) |
754 | return (void) log_link_debug(link, "%s(): static bridge MDB entries are not configured.", __func__); | |
755 | ||
40ca350e YW |
756 | if (!link->static_neighbors_configured) |
757 | return (void) log_link_debug(link, "%s(): static neighbors are not configured.", __func__); | |
758 | ||
d19b9939 YW |
759 | if (!link->static_nexthops_configured) |
760 | return (void) log_link_debug(link, "%s(): static nexthops are not configured.", __func__); | |
c16c7808 | 761 | |
76c5a0f2 YW |
762 | if (!link->static_routes_configured) |
763 | return (void) log_link_debug(link, "%s(): static routes are not configured.", __func__); | |
764 | ||
0e5ef6be | 765 | if (!link->static_routing_policy_rules_configured) |
d19b9939 | 766 | return (void) log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__); |
6accfd31 | 767 | |
d19b9939 YW |
768 | if (!link->tc_configured) |
769 | return (void) log_link_debug(link, "%s(): traffic controls are not configured.", __func__); | |
4ecdcb07 | 770 | |
d19b9939 YW |
771 | if (!link->sr_iov_configured) |
772 | return (void) log_link_debug(link, "%s(): SR-IOV is not configured.", __func__); | |
518cd6b5 | 773 | |
d19b9939 YW |
774 | if (!link->bridge_mdb_configured) |
775 | return (void) log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__); | |
1f241589 | 776 | |
463797c1 | 777 | if (link_has_carrier(link) || !link->network->configure_without_carrier) { |
50550722 YW |
778 | bool has_ndisc_address = false; |
779 | NDiscAddress *n; | |
6accfd31 | 780 | |
94876904 YW |
781 | if (link_ipv6ll_enabled(link) && !in6_addr_is_set(&link->ipv6ll_address)) |
782 | return (void) log_link_debug(link, "%s(): IPv6LL is not configured yet.", __func__); | |
6accfd31 | 783 | |
90e74a66 | 784 | SET_FOREACH(n, link->ndisc_addresses) |
50550722 YW |
785 | if (!n->marked) { |
786 | has_ndisc_address = true; | |
787 | break; | |
788 | } | |
789 | ||
8cd37e43 | 790 | if ((link_dhcp4_enabled(link) || link_dhcp6_with_address_enabled(link) || link_ipv4ll_enabled(link)) && |
50550722 | 791 | !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address && |
0d0799da YW |
792 | !link->ipv4ll_address_configured) |
793 | /* When DHCP[46] or IPv4LL is enabled, at least one address is acquired by them. */ | |
794 | return (void) log_link_debug(link, "%s(): DHCP4, DHCP6 or IPv4LL is enabled but no dynamic address is assigned yet.", __func__); | |
659ad3a0 | 795 | |
0d0799da YW |
796 | if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || |
797 | link_ipv6_accept_ra_enabled(link) || link_ipv4ll_enabled(link)) { | |
39373cb9 YW |
798 | if (!link->dhcp4_configured && |
799 | !(link->dhcp6_address_configured && link->dhcp6_route_configured) && | |
800 | !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) && | |
d98c546d | 801 | !(link->ndisc_addresses_configured && link->ndisc_routes_configured) && |
0d0799da YW |
802 | !link->ipv4ll_address_configured) |
803 | /* When DHCP[46], NDisc, or IPv4LL is enabled, at least one protocol must be finished. */ | |
d19b9939 | 804 | return (void) log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__); |
39373cb9 | 805 | |
0d0799da | 806 | log_link_debug(link, "%s(): dhcp4:%s ipv4ll:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s", |
39373cb9 YW |
807 | __func__, |
808 | yes_no(link->dhcp4_configured), | |
0d0799da | 809 | yes_no(link->ipv4ll_address_configured), |
39373cb9 YW |
810 | yes_no(link->dhcp6_address_configured), |
811 | yes_no(link->dhcp6_route_configured), | |
812 | yes_no(link->dhcp6_pd_address_configured), | |
813 | yes_no(link->dhcp6_pd_route_configured), | |
d98c546d YW |
814 | yes_no(link->ndisc_addresses_configured), |
815 | yes_no(link->ndisc_routes_configured)); | |
39373cb9 | 816 | } |
463797c1 | 817 | } |
6accfd31 | 818 | |
5f58af25 | 819 | link_enter_configured(link); |
6accfd31 DA |
820 | } |
821 | ||
682c65b0 | 822 | static int link_set_static_configs(Link *link) { |
f882c247 TG |
823 | int r; |
824 | ||
825 | assert(link); | |
826 | assert(link->network); | |
f5be5601 | 827 | assert(link->state != _LINK_STATE_INVALID); |
f882c247 | 828 | |
1f241589 YW |
829 | r = link_set_bridge_mdb(link); |
830 | if (r < 0) | |
831 | return r; | |
832 | ||
76c5a0f2 YW |
833 | r = link_set_ipv6_proxy_ndp_addresses(link); |
834 | if (r < 0) | |
835 | return r; | |
836 | ||
0e5ef6be YW |
837 | r = link_set_address_labels(link); |
838 | if (r < 0) | |
839 | return r; | |
840 | ||
76c5a0f2 | 841 | r = link_request_static_addresses(link); |
f3ef324d YW |
842 | if (r < 0) |
843 | return r; | |
e4a71bf3 | 844 | |
e5b35bf6 YW |
845 | r = link_request_static_bridge_fdb(link); |
846 | if (r < 0) | |
847 | return r; | |
848 | ||
40ca350e | 849 | r = link_request_static_neighbors(link); |
682c65b0 YW |
850 | if (r < 0) |
851 | return r; | |
bd6379ec | 852 | |
76c5a0f2 | 853 | r = link_request_static_nexthops(link, false); |
fe2bc17c YW |
854 | if (r < 0) |
855 | return r; | |
f882c247 | 856 | |
76c5a0f2 YW |
857 | r = link_request_static_routes(link, false); |
858 | if (r < 0) | |
859 | return r; | |
860 | ||
861 | r = link_request_static_routing_policy_rules(link); | |
5ae0fb7f YW |
862 | if (r < 0) |
863 | return r; | |
d4cdbea5 | 864 | |
f882c247 TG |
865 | return 0; |
866 | } | |
867 | ||
3a390124 | 868 | static int link_configure_continue(Link *link); |
55dc8c4a | 869 | |
e16e4b3b DS |
870 | static int link_mac_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
871 | int r; | |
872 | ||
873 | assert(link); | |
874 | ||
875 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
876 | return 1; | |
877 | ||
878 | r = sd_netlink_message_get_errno(m); | |
879 | if (r < 0) | |
880 | log_link_message_warning_errno(link, m, r, "Could not set MAC address, ignoring"); | |
881 | else | |
882 | log_link_debug(link, "Setting MAC address done."); | |
883 | ||
884 | return 1; | |
885 | } | |
886 | ||
887 | static int link_set_mac(Link *link) { | |
888 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
889 | int r; | |
890 | ||
891 | assert(link); | |
892 | assert(link->network); | |
893 | assert(link->manager); | |
894 | assert(link->manager->rtnl); | |
895 | ||
896 | if (!link->network->mac) | |
897 | return 0; | |
898 | ||
899 | log_link_debug(link, "Setting MAC address"); | |
900 | ||
901 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
902 | if (r < 0) | |
903 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
904 | ||
905 | r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac); | |
906 | if (r < 0) | |
907 | return log_link_error_errno(link, r, "Could not set MAC address: %m"); | |
908 | ||
909 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_mac_handler, | |
910 | link_netlink_destroy_callback, link); | |
911 | if (r < 0) | |
912 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
913 | ||
914 | link_ref(link); | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
919 | static int link_nomaster_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
920 | int r; | |
921 | ||
922 | assert(link); | |
923 | ||
924 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
925 | return 1; | |
926 | ||
927 | r = sd_netlink_message_get_errno(m); | |
928 | if (r < 0) | |
929 | log_link_message_warning_errno(link, m, r, "Could not set nomaster, ignoring"); | |
930 | else | |
931 | log_link_debug(link, "Setting nomaster done."); | |
932 | ||
933 | return 1; | |
934 | } | |
935 | ||
936 | static int link_set_nomaster(Link *link) { | |
937 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
938 | int r; | |
939 | ||
940 | assert(link); | |
941 | assert(link->network); | |
942 | assert(link->manager); | |
943 | assert(link->manager->rtnl); | |
944 | ||
945 | /* set it free if not enslaved with networkd */ | |
c0267a59 | 946 | if (link->network->batadv || link->network->bridge || link->network->bond || link->network->vrf) |
e16e4b3b DS |
947 | return 0; |
948 | ||
949 | log_link_debug(link, "Setting nomaster"); | |
950 | ||
951 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
952 | if (r < 0) | |
953 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
954 | ||
955 | r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0); | |
956 | if (r < 0) | |
957 | return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m"); | |
958 | ||
959 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_nomaster_handler, | |
960 | link_netlink_destroy_callback, link); | |
961 | if (r < 0) | |
962 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
963 | ||
964 | link_ref(link); | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
302a796f | 969 | static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4f882b2a TG |
970 | int r; |
971 | ||
972 | assert(m); | |
973 | assert(link); | |
974 | assert(link->ifname); | |
975 | ||
55dc8c4a YW |
976 | link->setting_mtu = false; |
977 | ||
5da8149f | 978 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
4f882b2a TG |
979 | return 1; |
980 | ||
1c4baffc | 981 | r = sd_netlink_message_get_errno(m); |
4ff296b0 | 982 | if (r < 0) |
5ecb131d | 983 | log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring"); |
4ff296b0 YW |
984 | else |
985 | log_link_debug(link, "Setting MTU done."); | |
55dc8c4a | 986 | |
4ff296b0 | 987 | if (link->state == LINK_STATE_INITIALIZED) { |
3a390124 | 988 | r = link_configure_continue(link); |
4ff296b0 YW |
989 | if (r < 0) |
990 | link_enter_failed(link); | |
991 | } | |
4f882b2a TG |
992 | |
993 | return 1; | |
994 | } | |
995 | ||
933c70a0 | 996 | int link_set_mtu(Link *link, uint32_t mtu) { |
4afd3348 | 997 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
4f882b2a TG |
998 | int r; |
999 | ||
1000 | assert(link); | |
1001 | assert(link->manager); | |
1002 | assert(link->manager->rtnl); | |
1003 | ||
40288ece YW |
1004 | if (mtu == 0 || link->setting_mtu) |
1005 | return 0; | |
1006 | ||
933c70a0 | 1007 | if (link->mtu == mtu) |
ee493106 YW |
1008 | return 0; |
1009 | ||
6a7a4e4d | 1010 | log_link_debug(link, "Setting MTU: %" PRIu32, mtu); |
4f882b2a | 1011 | |
6a7a4e4d LP |
1012 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
1013 | if (r < 0) | |
1014 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
4f882b2a | 1015 | |
44b598a1 | 1016 | /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes |
72c2500b YW |
1017 | * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */ |
1018 | if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) { | |
44b598a1 SS |
1019 | |
1020 | log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as " | |
d236718c | 1021 | "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes"); |
44b598a1 | 1022 | |
72c2500b | 1023 | mtu = IPV6_MIN_MTU; |
44b598a1 SS |
1024 | } |
1025 | ||
1c4baffc | 1026 | r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu); |
6a7a4e4d LP |
1027 | if (r < 0) |
1028 | return log_link_error_errno(link, r, "Could not append MTU: %m"); | |
4f882b2a | 1029 | |
302a796f YW |
1030 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler, |
1031 | link_netlink_destroy_callback, link); | |
6a7a4e4d LP |
1032 | if (r < 0) |
1033 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
4f882b2a | 1034 | |
ae941762 | 1035 | link_ref(link); |
1046bf9b | 1036 | link->setting_mtu = true; |
b226d99b | 1037 | |
4f882b2a TG |
1038 | return 0; |
1039 | } | |
1040 | ||
f6fcc1c2 YW |
1041 | static bool link_reduces_vlan_mtu(Link *link) { |
1042 | /* See netif_reduces_vlan_mtu() in kernel. */ | |
1043 | return streq_ptr(link->kind, "macsec"); | |
1044 | } | |
1045 | ||
1046 | static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) { | |
1047 | uint32_t mtu = 0; | |
1048 | NetDev *dev; | |
f6fcc1c2 | 1049 | |
90e74a66 | 1050 | HASHMAP_FOREACH(dev, link->network->stacked_netdevs) |
f6fcc1c2 YW |
1051 | if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0) |
1052 | /* See vlan_dev_change_mtu() in kernel. */ | |
1053 | mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu); | |
1054 | ||
1055 | else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu) | |
1056 | /* See macvlan_change_mtu() in kernel. */ | |
1057 | mtu = dev->mtu; | |
1058 | ||
1059 | return mtu; | |
1060 | } | |
1061 | ||
1062 | static int link_configure_mtu(Link *link) { | |
1063 | uint32_t mtu; | |
1064 | ||
1065 | assert(link); | |
1066 | assert(link->network); | |
1067 | ||
1068 | if (link->network->mtu > 0) | |
1069 | return link_set_mtu(link, link->network->mtu); | |
1070 | ||
1071 | mtu = link_get_requested_mtu_by_stacked_netdevs(link); | |
1072 | if (link->mtu >= mtu) | |
1073 | return 0; | |
1074 | ||
1075 | log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. " | |
1076 | "If it is not desired, then please explicitly specify MTUBytes= setting.", | |
1077 | link->mtu, mtu); | |
1078 | ||
1079 | return link_set_mtu(link, mtu); | |
1080 | } | |
1081 | ||
302a796f | 1082 | static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
99d2baa2 SS |
1083 | int r; |
1084 | ||
1085 | assert(m); | |
1086 | assert(link); | |
1087 | assert(link->ifname); | |
1088 | ||
1089 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1090 | return 1; | |
1091 | ||
1092 | r = sd_netlink_message_get_errno(m); | |
1093 | if (r < 0) | |
5ecb131d | 1094 | log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring"); |
99d2baa2 SS |
1095 | |
1096 | return 1; | |
1097 | } | |
1098 | ||
1099 | static int link_set_flags(Link *link) { | |
1100 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1101 | unsigned ifi_change = 0; | |
1102 | unsigned ifi_flags = 0; | |
1103 | int r; | |
1104 | ||
1105 | assert(link); | |
1106 | assert(link->manager); | |
1107 | assert(link->manager->rtnl); | |
1108 | ||
1109 | if (link->flags & IFF_LOOPBACK) | |
1110 | return 0; | |
1111 | ||
1112 | if (!link->network) | |
1113 | return 0; | |
1114 | ||
937e305e SS |
1115 | if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0 && |
1116 | link->network->promiscuous < 0) | |
99d2baa2 SS |
1117 | return 0; |
1118 | ||
1119 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1120 | if (r < 0) | |
1121 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1122 | ||
1123 | if (link->network->arp >= 0) { | |
1124 | ifi_change |= IFF_NOARP; | |
e6ebebbe SS |
1125 | SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0); |
1126 | } | |
1127 | ||
1128 | if (link->network->multicast >= 0) { | |
1129 | ifi_change |= IFF_MULTICAST; | |
1130 | SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast); | |
99d2baa2 SS |
1131 | } |
1132 | ||
866e6b7a SS |
1133 | if (link->network->allmulticast >= 0) { |
1134 | ifi_change |= IFF_ALLMULTI; | |
1135 | SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast); | |
1136 | } | |
1137 | ||
937e305e SS |
1138 | if (link->network->promiscuous >= 0) { |
1139 | ifi_change |= IFF_PROMISC; | |
1140 | SET_FLAG(ifi_flags, IFF_PROMISC, link->network->promiscuous); | |
1141 | } | |
1142 | ||
99d2baa2 SS |
1143 | r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change); |
1144 | if (r < 0) | |
1145 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
1146 | ||
302a796f YW |
1147 | r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler, |
1148 | link_netlink_destroy_callback, link); | |
99d2baa2 SS |
1149 | if (r < 0) |
1150 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1151 | ||
1152 | link_ref(link); | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
e7ab854c TG |
1157 | static int link_acquire_ipv6_conf(Link *link) { |
1158 | int r; | |
1159 | ||
1160 | assert(link); | |
1161 | ||
086b8853 | 1162 | if (link->radv) { |
7465dd22 | 1163 | assert(link->radv); |
94876904 | 1164 | assert(in6_addr_is_link_local(&link->ipv6ll_address)); |
7465dd22 PF |
1165 | |
1166 | log_link_debug(link, "Starting IPv6 Router Advertisements"); | |
1167 | ||
fd3ef936 YW |
1168 | r = radv_emit_dns(link); |
1169 | if (r < 0) | |
1170 | return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m"); | |
1171 | ||
7465dd22 PF |
1172 | r = sd_radv_start(link->radv); |
1173 | if (r < 0 && r != -EBUSY) | |
1174 | return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m"); | |
1175 | } | |
1176 | ||
294f129b YW |
1177 | r = ndisc_start(link); |
1178 | if (r < 0) | |
1179 | return log_link_warning_errno(link, r, "Failed to start IPv6 Router Discovery: %m"); | |
cd305af1 | 1180 | |
294f129b YW |
1181 | r = dhcp6_start(link); |
1182 | if (r < 0) | |
1183 | return log_link_warning_errno(link, r, "Failed to start DHCPv6 client: %m"); | |
cd305af1 | 1184 | |
1633c457 YW |
1185 | r = dhcp6_request_prefix_delegation(link); |
1186 | if (r < 0) | |
1187 | return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m"); | |
10752343 | 1188 | |
e7ab854c TG |
1189 | return 0; |
1190 | } | |
1191 | ||
6fc25497 | 1192 | static int link_acquire_ipv4_conf(Link *link) { |
ff254138 TG |
1193 | int r; |
1194 | ||
1195 | assert(link); | |
ff254138 TG |
1196 | assert(link->manager); |
1197 | assert(link->manager->event); | |
1198 | ||
0107b769 | 1199 | if (link->dhcp_client) { |
294f129b | 1200 | r = dhcp4_start(link); |
0107b769 | 1201 | if (r < 0) |
294f129b | 1202 | return log_link_warning_errno(link, r, "Failed to start DHCPv4 client: %m"); |
0107b769 | 1203 | |
0b4b66cc | 1204 | } else if (link->ipv4ll) { |
6a7a4e4d | 1205 | log_link_debug(link, "Acquiring IPv4 link-local address"); |
5c1d3fc9 UTL |
1206 | |
1207 | r = sd_ipv4ll_start(link->ipv4ll); | |
6a7a4e4d LP |
1208 | if (r < 0) |
1209 | return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m"); | |
5c1d3fc9 UTL |
1210 | } |
1211 | ||
6fc25497 SS |
1212 | return 0; |
1213 | } | |
1214 | ||
1215 | static int link_acquire_conf(Link *link) { | |
1216 | int r; | |
1217 | ||
1218 | assert(link); | |
1219 | ||
1220 | r = link_acquire_ipv4_conf(link); | |
1221 | if (r < 0) | |
1222 | return r; | |
1223 | ||
94876904 | 1224 | if (in6_addr_is_set(&link->ipv6ll_address)) { |
6fc25497 SS |
1225 | r = link_acquire_ipv6_conf(link); |
1226 | if (r < 0) | |
1227 | return r; | |
1228 | } | |
1229 | ||
2ffd6d73 YW |
1230 | r = link_lldp_emit_start(link); |
1231 | if (r < 0) | |
1232 | return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m"); | |
8e1ad1ea | 1233 | |
ff254138 TG |
1234 | return 0; |
1235 | } | |
1236 | ||
a61bb41c | 1237 | bool link_has_carrier(Link *link) { |
deb2e523 TG |
1238 | /* see Documentation/networking/operstates.txt in the kernel sources */ |
1239 | ||
a61bb41c | 1240 | if (link->kernel_operstate == IF_OPER_UP) |
deb2e523 TG |
1241 | return true; |
1242 | ||
a61bb41c | 1243 | if (link->kernel_operstate == IF_OPER_UNKNOWN) |
deb2e523 | 1244 | /* operstate may not be implemented, so fall back to flags */ |
b26ea308 YW |
1245 | if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) && |
1246 | !FLAGS_SET(link->flags, IFF_DORMANT)) | |
deb2e523 TG |
1247 | return true; |
1248 | ||
1249 | return false; | |
1250 | } | |
1251 | ||
0e2fdb83 SS |
1252 | static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
1253 | int r; | |
1254 | ||
1255 | assert(link); | |
1256 | ||
9524014e DS |
1257 | link->setting_genmode = false; |
1258 | ||
0e2fdb83 SS |
1259 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
1260 | return 1; | |
1261 | ||
1262 | r = sd_netlink_message_get_errno(m); | |
1263 | if (r < 0) | |
5ecb131d | 1264 | log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring"); |
9524014e DS |
1265 | else |
1266 | log_link_debug(link, "Setting address genmode done."); | |
1267 | ||
1268 | if (link->state == LINK_STATE_INITIALIZED) { | |
1269 | r = link_configure_continue(link); | |
1270 | if (r < 0) | |
1271 | link_enter_failed(link); | |
1272 | } | |
0e2fdb83 SS |
1273 | |
1274 | return 1; | |
1275 | } | |
1276 | ||
1277 | static int link_configure_addrgen_mode(Link *link) { | |
1278 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1279 | uint8_t ipv6ll_mode; | |
1280 | int r; | |
1281 | ||
1282 | assert(link); | |
1283 | assert(link->network); | |
1284 | assert(link->manager); | |
1285 | assert(link->manager->rtnl); | |
1286 | ||
9524014e | 1287 | if (!socket_ipv6_is_supported() || link->setting_genmode) |
9f6e82e6 YW |
1288 | return 0; |
1289 | ||
0e2fdb83 SS |
1290 | log_link_debug(link, "Setting address genmode for link"); |
1291 | ||
1292 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1293 | if (r < 0) | |
1294 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1295 | ||
1296 | r = sd_netlink_message_open_container(req, IFLA_AF_SPEC); | |
1297 | if (r < 0) | |
1298 | return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m"); | |
1299 | ||
1300 | r = sd_netlink_message_open_container(req, AF_INET6); | |
1301 | if (r < 0) | |
1302 | return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m"); | |
1303 | ||
1304 | if (!link_ipv6ll_enabled(link)) | |
1305 | ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE; | |
6f6296b9 | 1306 | else if (link->network->ipv6ll_address_gen_mode < 0) { |
a6f1848a SS |
1307 | r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL); |
1308 | if (r < 0) { | |
1309 | /* The file may not exist. And even if it exists, when stable_secret is unset, | |
0e275271 YW |
1310 | * reading the file fails with ENOMEM when read_full_virtual_file(), which uses |
1311 | * read() as the backend, and EIO when read_one_line_file() which uses fgetc(). */ | |
1312 | log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret, ignoring: %m"); | |
a6f1848a SS |
1313 | |
1314 | ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64; | |
1315 | } else | |
1316 | ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY; | |
1317 | } else | |
6f6296b9 | 1318 | ipv6ll_mode = link->network->ipv6ll_address_gen_mode; |
0e2fdb83 SS |
1319 | |
1320 | r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode); | |
1321 | if (r < 0) | |
1322 | return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m"); | |
1323 | ||
1324 | r = sd_netlink_message_close_container(req); | |
1325 | if (r < 0) | |
1326 | return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m"); | |
1327 | ||
1328 | r = sd_netlink_message_close_container(req); | |
1329 | if (r < 0) | |
1330 | return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m"); | |
1331 | ||
1332 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler, | |
1333 | link_netlink_destroy_callback, link); | |
1334 | if (r < 0) | |
1335 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1336 | ||
1337 | link_ref(link); | |
9524014e | 1338 | link->setting_genmode = true; |
0e2fdb83 SS |
1339 | |
1340 | return 0; | |
1341 | } | |
1342 | ||
302a796f | 1343 | static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
dd3efc09 TG |
1344 | int r; |
1345 | ||
1746cf2a TG |
1346 | assert(link); |
1347 | ||
5da8149f | 1348 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
1746cf2a TG |
1349 | return 1; |
1350 | ||
1c4baffc | 1351 | r = sd_netlink_message_get_errno(m); |
6a7a4e4d | 1352 | if (r < 0) |
26d6b214 | 1353 | /* we warn but don't fail the link, as it may be brought up later */ |
5ecb131d | 1354 | log_link_message_warning_errno(link, m, r, "Could not bring up interface"); |
45ad2c13 | 1355 | |
f882c247 TG |
1356 | return 1; |
1357 | } | |
1358 | ||
f282ce20 | 1359 | int link_up(Link *link) { |
4afd3348 | 1360 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
f579559b TG |
1361 | int r; |
1362 | ||
f882c247 | 1363 | assert(link); |
c106cc36 | 1364 | assert(link->network); |
f882c247 TG |
1365 | assert(link->manager); |
1366 | assert(link->manager->rtnl); | |
1367 | ||
6a7a4e4d | 1368 | log_link_debug(link, "Bringing link up"); |
449f7554 | 1369 | |
6a7a4e4d LP |
1370 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); |
1371 | if (r < 0) | |
1372 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
f579559b | 1373 | |
5d4795f3 | 1374 | r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP); |
6a7a4e4d LP |
1375 | if (r < 0) |
1376 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
fc25d7f8 | 1377 | |
302a796f YW |
1378 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler, |
1379 | link_netlink_destroy_callback, link); | |
6a7a4e4d LP |
1380 | if (r < 0) |
1381 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
f579559b | 1382 | |
b226d99b TG |
1383 | link_ref(link); |
1384 | ||
f882c247 TG |
1385 | return 0; |
1386 | } | |
1387 | ||
302a796f | 1388 | static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
0d4ad91d AR |
1389 | int r; |
1390 | ||
1391 | assert(link); | |
1392 | ||
1393 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1394 | return 1; | |
1395 | ||
1c4baffc | 1396 | r = sd_netlink_message_get_errno(m); |
0d4ad91d | 1397 | if (r < 0) |
5ecb131d | 1398 | log_link_message_warning_errno(link, m, r, "Could not bring down interface"); |
0d4ad91d AR |
1399 | |
1400 | return 1; | |
1401 | } | |
1402 | ||
8e54db83 | 1403 | int link_down(Link *link, link_netlink_message_handler_t callback) { |
4afd3348 | 1404 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
0d4ad91d AR |
1405 | int r; |
1406 | ||
1407 | assert(link); | |
1408 | assert(link->manager); | |
1409 | assert(link->manager->rtnl); | |
1410 | ||
6a7a4e4d | 1411 | log_link_debug(link, "Bringing link down"); |
0d4ad91d AR |
1412 | |
1413 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, | |
1414 | RTM_SETLINK, link->ifindex); | |
6a7a4e4d LP |
1415 | if (r < 0) |
1416 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
0d4ad91d AR |
1417 | |
1418 | r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP); | |
6a7a4e4d LP |
1419 | if (r < 0) |
1420 | return log_link_error_errno(link, r, "Could not set link flags: %m"); | |
0d4ad91d | 1421 | |
8e54db83 YW |
1422 | r = netlink_call_async(link->manager->rtnl, NULL, req, |
1423 | callback ?: link_down_handler, | |
302a796f | 1424 | link_netlink_destroy_callback, link); |
6a7a4e4d LP |
1425 | if (r < 0) |
1426 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
0d4ad91d AR |
1427 | |
1428 | link_ref(link); | |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | ||
89fe6535 SS |
1433 | static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
1434 | int r; | |
1435 | ||
1436 | assert(link); | |
1437 | ||
1438 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) | |
1439 | return 1; | |
1440 | ||
1441 | r = sd_netlink_message_get_errno(m); | |
1442 | if (r < 0) | |
1443 | log_link_message_warning_errno(link, m, r, "Could not set group for the interface"); | |
1444 | ||
1445 | return 1; | |
1446 | } | |
1447 | ||
1448 | static int link_set_group(Link *link) { | |
1449 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
1450 | int r; | |
1451 | ||
1452 | assert(link); | |
1453 | assert(link->network); | |
1454 | assert(link->manager); | |
1455 | assert(link->manager->rtnl); | |
1456 | ||
f0c09831 | 1457 | if (!link->network->group_set) |
89fe6535 SS |
1458 | return 0; |
1459 | ||
1460 | log_link_debug(link, "Setting group"); | |
1461 | ||
1462 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex); | |
1463 | if (r < 0) | |
1464 | return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m"); | |
1465 | ||
1466 | r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group); | |
1467 | if (r < 0) | |
1468 | return log_link_error_errno(link, r, "Could not set link group: %m"); | |
1469 | ||
1470 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler, | |
1471 | link_netlink_destroy_callback, link); | |
1472 | if (r < 0) | |
1473 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
1474 | ||
1475 | link_ref(link); | |
1476 | ||
1477 | return 0; | |
1478 | } | |
1479 | ||
0d4ad91d AR |
1480 | static int link_handle_bound_to_list(Link *link) { |
1481 | Link *l; | |
0d4ad91d AR |
1482 | int r; |
1483 | bool required_up = false; | |
1484 | bool link_is_up = false; | |
1485 | ||
1486 | assert(link); | |
1487 | ||
1488 | if (hashmap_isempty(link->bound_to_links)) | |
1489 | return 0; | |
1490 | ||
1491 | if (link->flags & IFF_UP) | |
1492 | link_is_up = true; | |
1493 | ||
90e74a66 | 1494 | HASHMAP_FOREACH (l, link->bound_to_links) |
0d4ad91d AR |
1495 | if (link_has_carrier(l)) { |
1496 | required_up = true; | |
1497 | break; | |
1498 | } | |
1499 | ||
1500 | if (!required_up && link_is_up) { | |
8e54db83 | 1501 | r = link_down(link, NULL); |
0d4ad91d AR |
1502 | if (r < 0) |
1503 | return r; | |
1504 | } else if (required_up && !link_is_up) { | |
1505 | r = link_up(link); | |
1506 | if (r < 0) | |
1507 | return r; | |
1508 | } | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | static int link_handle_bound_by_list(Link *link) { | |
0d4ad91d AR |
1514 | Link *l; |
1515 | int r; | |
1516 | ||
1517 | assert(link); | |
1518 | ||
1519 | if (hashmap_isempty(link->bound_by_links)) | |
1520 | return 0; | |
1521 | ||
90e74a66 | 1522 | HASHMAP_FOREACH (l, link->bound_by_links) { |
0d4ad91d AR |
1523 | r = link_handle_bound_to_list(l); |
1524 | if (r < 0) | |
1525 | return r; | |
1526 | } | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) { | |
1532 | int r; | |
1533 | ||
1534 | assert(link); | |
1535 | assert(carrier); | |
1536 | ||
1537 | if (link == carrier) | |
1538 | return 0; | |
1539 | ||
1540 | if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex))) | |
1541 | return 0; | |
1542 | ||
190b3b5c | 1543 | r = hashmap_ensure_put(h, NULL, INT_TO_PTR(carrier->ifindex), carrier); |
0d4ad91d AR |
1544 | if (r < 0) |
1545 | return r; | |
1546 | ||
9092113d YW |
1547 | link_dirty(link); |
1548 | ||
0d4ad91d AR |
1549 | return 0; |
1550 | } | |
1551 | ||
1552 | static int link_new_bound_by_list(Link *link) { | |
1553 | Manager *m; | |
1554 | Link *carrier; | |
0d4ad91d | 1555 | int r; |
0d4ad91d AR |
1556 | |
1557 | assert(link); | |
1558 | assert(link->manager); | |
1559 | ||
1560 | m = link->manager; | |
1561 | ||
90e74a66 | 1562 | HASHMAP_FOREACH(carrier, m->links) { |
0d4ad91d AR |
1563 | if (!carrier->network) |
1564 | continue; | |
1565 | ||
1566 | if (strv_isempty(carrier->network->bind_carrier)) | |
1567 | continue; | |
1568 | ||
191a3f16 | 1569 | if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) { |
0d4ad91d AR |
1570 | r = link_put_carrier(link, carrier, &link->bound_by_links); |
1571 | if (r < 0) | |
1572 | return r; | |
0d4ad91d AR |
1573 | } |
1574 | } | |
1575 | ||
90e74a66 | 1576 | HASHMAP_FOREACH(carrier, link->bound_by_links) { |
0d4ad91d AR |
1577 | r = link_put_carrier(carrier, link, &carrier->bound_to_links); |
1578 | if (r < 0) | |
1579 | return r; | |
0d4ad91d AR |
1580 | } |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | static int link_new_bound_to_list(Link *link) { | |
1586 | Manager *m; | |
1587 | Link *carrier; | |
0d4ad91d | 1588 | int r; |
0d4ad91d AR |
1589 | |
1590 | assert(link); | |
1591 | assert(link->manager); | |
1592 | ||
1593 | if (!link->network) | |
1594 | return 0; | |
1595 | ||
1596 | if (strv_isempty(link->network->bind_carrier)) | |
1597 | return 0; | |
1598 | ||
1599 | m = link->manager; | |
1600 | ||
90e74a66 | 1601 | HASHMAP_FOREACH (carrier, m->links) { |
191a3f16 | 1602 | if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) { |
0d4ad91d AR |
1603 | r = link_put_carrier(link, carrier, &link->bound_to_links); |
1604 | if (r < 0) | |
1605 | return r; | |
0d4ad91d AR |
1606 | } |
1607 | } | |
1608 | ||
90e74a66 | 1609 | HASHMAP_FOREACH (carrier, link->bound_to_links) { |
0d4ad91d AR |
1610 | r = link_put_carrier(carrier, link, &carrier->bound_by_links); |
1611 | if (r < 0) | |
1612 | return r; | |
0d4ad91d AR |
1613 | } |
1614 | ||
1615 | return 0; | |
1616 | } | |
1617 | ||
1618 | static int link_new_carrier_maps(Link *link) { | |
1619 | int r; | |
1620 | ||
1621 | r = link_new_bound_by_list(link); | |
1622 | if (r < 0) | |
1623 | return r; | |
1624 | ||
1625 | r = link_handle_bound_by_list(link); | |
1626 | if (r < 0) | |
1627 | return r; | |
1628 | ||
1629 | r = link_new_bound_to_list(link); | |
1630 | if (r < 0) | |
1631 | return r; | |
1632 | ||
1633 | r = link_handle_bound_to_list(link); | |
1634 | if (r < 0) | |
1635 | return r; | |
1636 | ||
1637 | return 0; | |
1638 | } | |
1639 | ||
1640 | static void link_free_bound_to_list(Link *link) { | |
9092113d | 1641 | bool updated = false; |
0d4ad91d | 1642 | Link *bound_to; |
0d4ad91d | 1643 | |
9092113d YW |
1644 | assert(link); |
1645 | ||
1646 | while ((bound_to = hashmap_steal_first(link->bound_to_links))) { | |
1647 | updated = true; | |
0d4ad91d AR |
1648 | |
1649 | if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex))) | |
84de38c5 | 1650 | link_dirty(bound_to); |
0d4ad91d AR |
1651 | } |
1652 | ||
9092113d YW |
1653 | if (updated) |
1654 | link_dirty(link); | |
1655 | ||
0d4ad91d AR |
1656 | return; |
1657 | } | |
1658 | ||
1659 | static void link_free_bound_by_list(Link *link) { | |
9092113d | 1660 | bool updated = false; |
0d4ad91d | 1661 | Link *bound_by; |
0d4ad91d | 1662 | |
9092113d YW |
1663 | assert(link); |
1664 | ||
1665 | while ((bound_by = hashmap_steal_first(link->bound_by_links))) { | |
1666 | updated = true; | |
0d4ad91d AR |
1667 | |
1668 | if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) { | |
84de38c5 | 1669 | link_dirty(bound_by); |
0d4ad91d AR |
1670 | link_handle_bound_to_list(bound_by); |
1671 | } | |
1672 | } | |
1673 | ||
9092113d YW |
1674 | if (updated) |
1675 | link_dirty(link); | |
1676 | ||
0d4ad91d AR |
1677 | return; |
1678 | } | |
1679 | ||
1680 | static void link_free_carrier_maps(Link *link) { | |
0d4ad91d AR |
1681 | assert(link); |
1682 | ||
9092113d YW |
1683 | link_free_bound_to_list(link); |
1684 | link_free_bound_by_list(link); | |
0d4ad91d AR |
1685 | |
1686 | return; | |
1687 | } | |
1688 | ||
5f707e12 YW |
1689 | static int link_append_to_master(Link *link, NetDev *netdev) { |
1690 | Link *master; | |
1691 | int r; | |
1692 | ||
1693 | assert(link); | |
1694 | assert(netdev); | |
1695 | ||
1696 | r = link_get(link->manager, netdev->ifindex, &master); | |
1697 | if (r < 0) | |
1698 | return r; | |
1699 | ||
de7fef4b | 1700 | r = set_ensure_put(&master->slaves, NULL, link); |
38288f0b | 1701 | if (r <= 0) |
5f707e12 YW |
1702 | return r; |
1703 | ||
1704 | link_ref(link); | |
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | static void link_drop_from_master(Link *link, NetDev *netdev) { | |
1709 | Link *master; | |
1710 | ||
1711 | assert(link); | |
1712 | ||
1713 | if (!link->manager || !netdev) | |
1714 | return; | |
1715 | ||
1716 | if (link_get(link->manager, netdev->ifindex, &master) < 0) | |
1717 | return; | |
1718 | ||
1719 | link_unref(set_remove(master->slaves, link)); | |
1720 | } | |
1721 | ||
56001f02 YW |
1722 | static void link_drop_requests(Link *link) { |
1723 | Request *req; | |
1724 | ||
1725 | assert(link); | |
1726 | assert(link->manager); | |
1727 | ||
1728 | ORDERED_SET_FOREACH(req, link->manager->request_queue) | |
1729 | if (req->link == link) | |
1730 | request_drop(req); | |
1731 | } | |
1732 | ||
cc2d7efc YW |
1733 | |
1734 | static Link *link_drop(Link *link) { | |
0b54c870 YW |
1735 | char **n; |
1736 | ||
63130eb3 | 1737 | if (!link) |
cc2d7efc | 1738 | return NULL; |
0d4ad91d | 1739 | |
63130eb3 YW |
1740 | assert(link->manager); |
1741 | ||
0d4ad91d AR |
1742 | link_set_state(link, LINK_STATE_LINGER); |
1743 | ||
63130eb3 YW |
1744 | /* Drop all references from other links and manager. Note that async netlink calls may have |
1745 | * references to the link, and they will be dropped when we receive replies. */ | |
1746 | ||
56001f02 YW |
1747 | link_drop_requests(link); |
1748 | ||
0d4ad91d AR |
1749 | link_free_carrier_maps(link); |
1750 | ||
5f707e12 | 1751 | if (link->network) { |
c0267a59 | 1752 | link_drop_from_master(link, link->network->batadv); |
5f707e12 YW |
1753 | link_drop_from_master(link, link->network->bridge); |
1754 | link_drop_from_master(link, link->network->bond); | |
1755 | } | |
1756 | ||
63130eb3 | 1757 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
0d4ad91d | 1758 | |
db2f8a2e | 1759 | (void) unlink(link->state_file); |
63130eb3 YW |
1760 | link_clean(link); |
1761 | ||
0b54c870 YW |
1762 | STRV_FOREACH(n, link->alternative_names) |
1763 | hashmap_remove(link->manager->links_by_name, *n); | |
1764 | ||
1765 | hashmap_remove(link->manager->links_by_name, link->ifname); | |
1766 | ||
63130eb3 YW |
1767 | /* The following must be called at last. */ |
1768 | assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link); | |
cc2d7efc | 1769 | return link_unref(link); |
0d4ad91d AR |
1770 | } |
1771 | ||
04952b25 | 1772 | int link_activate(Link *link) { |
f882c247 TG |
1773 | int r; |
1774 | ||
ef1ba606 | 1775 | assert(link); |
f5be5601 | 1776 | assert(link->network); |
dd3efc09 | 1777 | |
61135582 DS |
1778 | switch (link->network->activation_policy) { |
1779 | case ACTIVATION_POLICY_BOUND: | |
0d4ad91d AR |
1780 | r = link_handle_bound_to_list(link); |
1781 | if (r < 0) | |
1782 | return r; | |
61135582 DS |
1783 | break; |
1784 | case ACTIVATION_POLICY_UP: | |
1785 | if (link->activated) | |
1786 | break; | |
1787 | _fallthrough_; | |
1788 | case ACTIVATION_POLICY_ALWAYS_UP: | |
505f8da7 | 1789 | r = link_up(link); |
04952b25 | 1790 | if (r < 0) |
505f8da7 | 1791 | return r; |
61135582 DS |
1792 | break; |
1793 | case ACTIVATION_POLICY_DOWN: | |
1794 | if (link->activated) | |
1795 | break; | |
1796 | _fallthrough_; | |
1797 | case ACTIVATION_POLICY_ALWAYS_DOWN: | |
1798 | r = link_down(link, NULL); | |
04952b25 | 1799 | if (r < 0) |
61135582 | 1800 | return r; |
61135582 DS |
1801 | break; |
1802 | default: | |
1803 | break; | |
ef1ba606 | 1804 | } |
61135582 | 1805 | link->activated = true; |
f882c247 | 1806 | |
04952b25 YW |
1807 | return 0; |
1808 | } | |
1809 | ||
1810 | static int link_joined(Link *link) { | |
1811 | int r; | |
1812 | ||
1813 | assert(link); | |
1814 | assert(link->network); | |
1815 | ||
1816 | r = link_activate(link); | |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | ||
9ed794a3 | 1820 | if (link->network->bridge) { |
e1853b00 | 1821 | r = link_set_bridge(link); |
6a7a4e4d LP |
1822 | if (r < 0) |
1823 | log_link_error_errno(link, r, "Could not set bridge message: %m"); | |
45e11abf YW |
1824 | |
1825 | r = link_append_to_master(link, link->network->bridge); | |
1826 | if (r < 0) | |
1827 | log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m"); | |
e1853b00 SS |
1828 | } |
1829 | ||
eb64b435 | 1830 | if (link->network->bond) { |
7fcee284 | 1831 | r = link_set_bond(link); |
eb64b435 SS |
1832 | if (r < 0) |
1833 | log_link_error_errno(link, r, "Could not set bond message: %m"); | |
959f65d3 | 1834 | |
45e11abf | 1835 | r = link_append_to_master(link, link->network->bond); |
959f65d3 YW |
1836 | if (r < 0) |
1837 | log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m"); | |
eb64b435 SS |
1838 | } |
1839 | ||
34d7f2c9 YW |
1840 | r = link_set_bridge_vlan(link); |
1841 | if (r < 0) | |
1842 | log_link_error_errno(link, r, "Could not set bridge vlan: %m"); | |
13b498f9 | 1843 | |
c1835a42 RM |
1844 | /* Skip setting up addresses until it gets carrier, |
1845 | or it would try to set addresses twice, | |
1846 | which is bad for non-idempotent steps. */ | |
dad2d78e | 1847 | if (!link_has_carrier(link) && !link->network->configure_without_carrier) |
c1835a42 RM |
1848 | return 0; |
1849 | ||
b425c3ae | 1850 | link_set_state(link, LINK_STATE_CONFIGURING); |
0e569a43 YW |
1851 | |
1852 | r = link_acquire_conf(link); | |
1853 | if (r < 0) | |
1854 | return r; | |
1855 | ||
682c65b0 | 1856 | return link_set_static_configs(link); |
02b59d57 TG |
1857 | } |
1858 | ||
302a796f | 1859 | static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
02b59d57 TG |
1860 | int r; |
1861 | ||
1746cf2a | 1862 | assert(link); |
ef1ba606 | 1863 | assert(link->network); |
34bf3c00 | 1864 | assert(link->enslaving > 0); |
02b59d57 | 1865 | |
313cefa1 | 1866 | link->enslaving--; |
52433f6b | 1867 | |
5da8149f | 1868 | if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) |
02b59d57 TG |
1869 | return 1; |
1870 | ||
1c4baffc | 1871 | r = sd_netlink_message_get_errno(m); |
856f962c | 1872 | if (r < 0 && r != -EEXIST) { |
5ecb131d | 1873 | log_link_message_warning_errno(link, m, r, "Could not join netdev"); |
ef1ba606 TG |
1874 | link_enter_failed(link); |
1875 | return 1; | |
4ff296b0 YW |
1876 | } |
1877 | ||
1878 | log_link_debug(link, "Joined netdev"); | |
02b59d57 | 1879 | |
34bf3c00 | 1880 | if (link->enslaving == 0) { |
4ff296b0 YW |
1881 | r = link_joined(link); |
1882 | if (r < 0) | |
1883 | link_enter_failed(link); | |
34bf3c00 | 1884 | } |
02b59d57 TG |
1885 | |
1886 | return 1; | |
1887 | } | |
1888 | ||
3f265037 | 1889 | static int link_enter_join_netdev(Link *link) { |
6a0a2f86 | 1890 | NetDev *netdev; |
02b59d57 TG |
1891 | int r; |
1892 | ||
1893 | assert(link); | |
1894 | assert(link->network); | |
bd08ce56 | 1895 | assert(link->state == LINK_STATE_INITIALIZED); |
02b59d57 | 1896 | |
289e6774 | 1897 | link_set_state(link, LINK_STATE_CONFIGURING); |
02b59d57 | 1898 | |
34bf3c00 | 1899 | link->enslaving = 0; |
02b59d57 | 1900 | |
d9c67ea1 | 1901 | if (link->network->bond) { |
cbff7170 TJ |
1902 | if (link->network->bond->state == NETDEV_STATE_READY && |
1903 | link->network->bond->ifindex == link->master_ifindex) | |
1904 | return link_joined(link); | |
1905 | ||
f2341e0a LP |
1906 | log_struct(LOG_DEBUG, |
1907 | LOG_LINK_INTERFACE(link), | |
1908 | LOG_NETDEV_INTERFACE(link->network->bond), | |
a1230ff9 | 1909 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname)); |
f2341e0a | 1910 | |
34bf3c00 YW |
1911 | link->enslaving++; |
1912 | ||
f2341e0a | 1913 | r = netdev_join(link->network->bond, link, netdev_join_handler); |
52433f6b | 1914 | if (r < 0) { |
f2341e0a LP |
1915 | log_struct_errno(LOG_WARNING, r, |
1916 | LOG_LINK_INTERFACE(link), | |
1917 | LOG_NETDEV_INTERFACE(link->network->bond), | |
a1230ff9 | 1918 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname)); |
52433f6b TG |
1919 | link_enter_failed(link); |
1920 | return r; | |
c0267a59 AW |
1921 | } |
1922 | } | |
1923 | ||
1924 | if (link->network->batadv) { | |
1925 | log_struct(LOG_DEBUG, | |
1926 | LOG_LINK_INTERFACE(link), | |
1927 | LOG_NETDEV_INTERFACE(link->network->batadv), | |
1928 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->batadv->ifname)); | |
1929 | ||
1930 | link->enslaving++; | |
1931 | ||
1932 | r = netdev_join(link->network->batadv, link, netdev_join_handler); | |
1933 | if (r < 0) { | |
1934 | log_struct_errno(LOG_WARNING, r, | |
1935 | LOG_LINK_INTERFACE(link), | |
1936 | LOG_NETDEV_INTERFACE(link->network->batadv), | |
1937 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->batadv->ifname)); | |
1938 | link_enter_failed(link); | |
1939 | return r; | |
52433f6b | 1940 | } |
0ad6148e MO |
1941 | } |
1942 | ||
d9c67ea1 | 1943 | if (link->network->bridge) { |
f2341e0a LP |
1944 | log_struct(LOG_DEBUG, |
1945 | LOG_LINK_INTERFACE(link), | |
1946 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
a1230ff9 | 1947 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname)); |
f2341e0a | 1948 | |
34bf3c00 YW |
1949 | link->enslaving++; |
1950 | ||
f2341e0a | 1951 | r = netdev_join(link->network->bridge, link, netdev_join_handler); |
0ad6148e | 1952 | if (r < 0) { |
f2341e0a LP |
1953 | log_struct_errno(LOG_WARNING, r, |
1954 | LOG_LINK_INTERFACE(link), | |
1955 | LOG_NETDEV_INTERFACE(link->network->bridge), | |
a1230ff9 | 1956 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname)); |
0ad6148e MO |
1957 | link_enter_failed(link); |
1958 | return r; | |
1959 | } | |
52433f6b TG |
1960 | } |
1961 | ||
6cb955c6 AR |
1962 | if (link->network->vrf) { |
1963 | log_struct(LOG_DEBUG, | |
1964 | LOG_LINK_INTERFACE(link), | |
1965 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
a1230ff9 ZJS |
1966 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname)); |
1967 | ||
34bf3c00 YW |
1968 | link->enslaving++; |
1969 | ||
6cb955c6 AR |
1970 | r = netdev_join(link->network->vrf, link, netdev_join_handler); |
1971 | if (r < 0) { | |
1972 | log_struct_errno(LOG_WARNING, r, | |
1973 | LOG_LINK_INTERFACE(link), | |
1974 | LOG_NETDEV_INTERFACE(link->network->vrf), | |
a1230ff9 | 1975 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname)); |
6cb955c6 AR |
1976 | link_enter_failed(link); |
1977 | return r; | |
1978 | } | |
6cb955c6 AR |
1979 | } |
1980 | ||
90e74a66 | 1981 | HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) { |
7951dea2 | 1982 | |
2b6db913 YW |
1983 | if (netdev->ifindex > 0) |
1984 | /* Assume already enslaved. */ | |
a63e5daa | 1985 | continue; |
a63e5daa | 1986 | |
7033af49 YW |
1987 | if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED) |
1988 | continue; | |
1989 | ||
f2341e0a LP |
1990 | log_struct(LOG_DEBUG, |
1991 | LOG_LINK_INTERFACE(link), | |
1992 | LOG_NETDEV_INTERFACE(netdev), | |
a1230ff9 | 1993 | LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname)); |
f2341e0a | 1994 | |
34bf3c00 YW |
1995 | link->enslaving++; |
1996 | ||
f2341e0a | 1997 | r = netdev_join(netdev, link, netdev_join_handler); |
7951dea2 | 1998 | if (r < 0) { |
f2341e0a LP |
1999 | log_struct_errno(LOG_WARNING, r, |
2000 | LOG_LINK_INTERFACE(link), | |
2001 | LOG_NETDEV_INTERFACE(netdev), | |
a1230ff9 | 2002 | LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname)); |
326cb406 SS |
2003 | link_enter_failed(link); |
2004 | return r; | |
2005 | } | |
326cb406 SS |
2006 | } |
2007 | ||
34bf3c00 YW |
2008 | if (link->enslaving == 0) |
2009 | return link_joined(link); | |
2010 | ||
ef1ba606 TG |
2011 | return 0; |
2012 | } | |
2013 | ||
5e5b137a | 2014 | static int link_drop_foreign_config(Link *link) { |
0b81225e YW |
2015 | int k, r; |
2016 | ||
2017 | assert(link); | |
2018 | assert(link->manager); | |
5e5b137a | 2019 | |
e36d601c | 2020 | r = link_drop_foreign_routes(link); |
5e5b137a | 2021 | |
e36d601c | 2022 | k = link_drop_foreign_nexthops(link); |
0b81225e YW |
2023 | if (k < 0 && r >= 0) |
2024 | r = k; | |
2025 | ||
e36d601c | 2026 | k = link_drop_foreign_addresses(link); |
0b81225e YW |
2027 | if (k < 0 && r >= 0) |
2028 | r = k; | |
d1bdafd2 | 2029 | |
e36d601c | 2030 | k = link_drop_foreign_neighbors(link); |
25b82b6e YW |
2031 | if (k < 0 && r >= 0) |
2032 | r = k; | |
2033 | ||
0b81225e YW |
2034 | k = manager_drop_foreign_routing_policy_rules(link->manager); |
2035 | if (k < 0 && r >= 0) | |
2036 | r = k; | |
2037 | ||
2038 | return r; | |
5e5b137a TG |
2039 | } |
2040 | ||
3104883d | 2041 | static int link_drop_config(Link *link) { |
0b81225e YW |
2042 | int k, r; |
2043 | ||
2044 | assert(link); | |
2045 | assert(link->manager); | |
3104883d | 2046 | |
e36d601c | 2047 | r = link_drop_routes(link); |
3104883d | 2048 | |
e36d601c | 2049 | k = link_drop_nexthops(link); |
0b81225e YW |
2050 | if (k < 0 && r >= 0) |
2051 | r = k; | |
d1bdafd2 | 2052 | |
e36d601c | 2053 | k = link_drop_addresses(link); |
0b81225e YW |
2054 | if (k < 0 && r >= 0) |
2055 | r = k; | |
2056 | ||
e36d601c | 2057 | k = link_drop_neighbors(link); |
25b82b6e YW |
2058 | if (k < 0 && r >= 0) |
2059 | r = k; | |
2060 | ||
0b81225e YW |
2061 | k = manager_drop_routing_policy_rules(link->manager, link); |
2062 | if (k < 0 && r >= 0) | |
2063 | r = k; | |
3104883d | 2064 | |
c69305ff LP |
2065 | ndisc_flush(link); |
2066 | ||
0b81225e | 2067 | return r; |
3104883d SS |
2068 | } |
2069 | ||
c3b94251 | 2070 | static int link_configure(Link *link) { |
4ecdcb07 YW |
2071 | int r; |
2072 | ||
ef1ba606 | 2073 | assert(link); |
b22d8a00 | 2074 | assert(link->network); |
bd08ce56 | 2075 | assert(link->state == LINK_STATE_INITIALIZED); |
a748b692 | 2076 | |
34658df2 | 2077 | r = link_configure_traffic_control(link); |
4ecdcb07 YW |
2078 | if (r < 0) |
2079 | return r; | |
2080 | ||
518cd6b5 SS |
2081 | r = link_configure_sr_iov(link); |
2082 | if (r < 0) | |
2083 | return r; | |
2084 | ||
500b96eb | 2085 | if (link->iftype == ARPHRD_CAN) |
600b7898 | 2086 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ |
93ea7750 | 2087 | return link_configure_can(link); |
92c918b0 | 2088 | |
5e0534f1 | 2089 | r = link_set_sysctl(link); |
b69c3180 SS |
2090 | if (r < 0) |
2091 | return r; | |
8749cbcd | 2092 | |
e16e4b3b DS |
2093 | r = link_set_mac(link); |
2094 | if (r < 0) | |
2095 | return r; | |
2096 | ||
2097 | r = link_set_nomaster(link); | |
2098 | if (r < 0) | |
2099 | return r; | |
2100 | ||
99d2baa2 SS |
2101 | r = link_set_flags(link); |
2102 | if (r < 0) | |
2103 | return r; | |
2104 | ||
89fe6535 SS |
2105 | r = link_set_group(link); |
2106 | if (r < 0) | |
2107 | return r; | |
2108 | ||
2ffd6d73 YW |
2109 | r = ipv4ll_configure(link); |
2110 | if (r < 0) | |
2111 | return r; | |
64b21ece | 2112 | |
2ffd6d73 YW |
2113 | r = dhcp4_configure(link); |
2114 | if (r < 0) | |
2115 | return r; | |
eb34d4af | 2116 | |
2ffd6d73 YW |
2117 | r = dhcp6_configure(link); |
2118 | if (r < 0) | |
2119 | return r; | |
f5a8c43f | 2120 | |
2ffd6d73 YW |
2121 | r = ndisc_configure(link); |
2122 | if (r < 0) | |
2123 | return r; | |
4138fb2c | 2124 | |
1d28a3cf YW |
2125 | r = link_request_dhcp_server(link); |
2126 | if (r < 0) | |
2127 | return r; | |
2128 | ||
086b8853 YW |
2129 | r = radv_configure(link); |
2130 | if (r < 0) | |
2131 | return r; | |
7465dd22 | 2132 | |
2ffd6d73 YW |
2133 | r = link_lldp_rx_configure(link); |
2134 | if (r < 0) | |
2135 | return r; | |
ce43e484 | 2136 | |
f6fcc1c2 | 2137 | r = link_configure_mtu(link); |
40288ece YW |
2138 | if (r < 0) |
2139 | return r; | |
44b598a1 | 2140 | |
9f6e82e6 YW |
2141 | r = link_configure_addrgen_mode(link); |
2142 | if (r < 0) | |
2143 | return r; | |
0e2fdb83 | 2144 | |
3a390124 DS |
2145 | return link_configure_continue(link); |
2146 | } | |
2147 | ||
2148 | /* The configuration continues in this separate function, instead of | |
2149 | * including this in the above link_configure() function, for two | |
2150 | * reasons: | |
2151 | * 1) some devices reset the link when the mtu is set, which caused | |
2152 | * an infinite loop here in networkd; see: | |
2153 | * https://github.com/systemd/systemd/issues/6593 | |
2154 | * https://github.com/systemd/systemd/issues/9831 | |
2155 | * 2) if ipv6ll is disabled, then bringing the interface up must be | |
2156 | * delayed until after we get confirmation from the kernel that | |
2157 | * the addr_gen_mode parameter has been set (via netlink), see: | |
2158 | * https://github.com/systemd/systemd/issues/13882 | |
2159 | */ | |
2160 | static int link_configure_continue(Link *link) { | |
55dc8c4a YW |
2161 | int r; |
2162 | ||
2163 | assert(link); | |
2164 | assert(link->network); | |
bd08ce56 | 2165 | assert(link->state == LINK_STATE_INITIALIZED); |
55dc8c4a | 2166 | |
9524014e | 2167 | if (link->setting_mtu || link->setting_genmode) |
55dc8c4a YW |
2168 | return 0; |
2169 | ||
4c649652 DS |
2170 | /* Drop foreign config, but ignore loopback or critical devices. |
2171 | * We do not want to remove loopback address or addresses used for root NFS. */ | |
2172 | if (!(link->flags & IFF_LOOPBACK) && | |
2173 | link->network->keep_configuration != KEEP_CONFIGURATION_YES) { | |
2174 | r = link_drop_foreign_config(link); | |
2175 | if (r < 0) | |
2176 | return r; | |
2177 | } | |
2178 | ||
d236718c DS |
2179 | /* The kernel resets ipv6 mtu after changing device mtu; |
2180 | * we must set this here, after we've set device mtu */ | |
2181 | r = link_set_ipv6_mtu(link); | |
2182 | if (r < 0) | |
5e0534f1 | 2183 | log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface, ignoring: %m"); |
d236718c | 2184 | |
3f265037 | 2185 | return link_enter_join_netdev(link); |
505f8da7 TG |
2186 | } |
2187 | ||
170e88c8 YW |
2188 | static int link_get_network(Link *link, Network **ret) { |
2189 | Network *network; | |
1a3caa49 | 2190 | int r; |
170e88c8 YW |
2191 | |
2192 | assert(link); | |
2193 | assert(link->manager); | |
2194 | assert(ret); | |
2195 | ||
2196 | ORDERED_HASHMAP_FOREACH(network, link->manager->networks) { | |
2197 | bool warn = false; | |
2198 | ||
1a3caa49 | 2199 | r = net_match_config( |
170e88c8 YW |
2200 | &network->match, |
2201 | link->sd_device, | |
2202 | &link->hw_addr.addr.ether, | |
2203 | &link->permanent_mac, | |
2204 | link->driver, | |
2205 | link->iftype, | |
2206 | link->ifname, | |
2207 | link->alternative_names, | |
2208 | link->wlan_iftype, | |
2209 | link->ssid, | |
1a3caa49 YW |
2210 | &link->bssid); |
2211 | if (r < 0) | |
2212 | return r; | |
2213 | if (r == 0) | |
170e88c8 YW |
2214 | continue; |
2215 | ||
2216 | if (network->match.ifname && link->sd_device) { | |
2217 | uint8_t name_assign_type = NET_NAME_UNKNOWN; | |
2218 | const char *attr; | |
2219 | ||
2220 | if (sd_device_get_sysattr_value(link->sd_device, "name_assign_type", &attr) >= 0) | |
2221 | (void) safe_atou8(attr, &name_assign_type); | |
2222 | ||
2223 | warn = name_assign_type == NET_NAME_ENUM; | |
2224 | } | |
2225 | ||
2226 | log_link_full(link, warn ? LOG_WARNING : LOG_DEBUG, | |
2227 | "found matching network '%s'%s.", | |
2228 | network->filename, | |
2229 | warn ? ", based on potentially unpredictable interface name" : ""); | |
2230 | ||
2231 | if (network->unmanaged) | |
2232 | return -ENOENT; | |
2233 | ||
2234 | *ret = network; | |
2235 | return 0; | |
2236 | } | |
2237 | ||
2238 | return -ENOENT; | |
2239 | } | |
2240 | ||
0b54c870 YW |
2241 | static int link_update_alternative_names(Link *link, sd_netlink_message *message) { |
2242 | _cleanup_strv_free_ char **altnames = NULL; | |
2243 | char **n; | |
2244 | int r; | |
2245 | ||
2246 | assert(link); | |
2247 | assert(message); | |
2248 | ||
2249 | r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &altnames); | |
2250 | if (r < 0 && r != -ENODATA) | |
2251 | return r; | |
2252 | ||
2253 | STRV_FOREACH(n, link->alternative_names) | |
2254 | hashmap_remove(link->manager->links_by_name, *n); | |
2255 | ||
2256 | strv_free_and_replace(link->alternative_names, altnames); | |
2257 | ||
2258 | STRV_FOREACH(n, link->alternative_names) { | |
2259 | r = hashmap_ensure_put(&link->manager->links_by_name, &string_hash_ops, *n, link); | |
2260 | if (r < 0) | |
2261 | return r; | |
2262 | } | |
2263 | ||
2264 | return 0; | |
2265 | } | |
2266 | ||
572b21d9 | 2267 | static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) { |
ad932b15 YW |
2268 | Network *network; |
2269 | int r; | |
2270 | ||
8bceafa7 | 2271 | assert(m); |
572b21d9 | 2272 | |
8bceafa7 YW |
2273 | r = sd_netlink_message_get_errno(m); |
2274 | if (r < 0) | |
2275 | return r; | |
572b21d9 | 2276 | |
0b54c870 YW |
2277 | r = link_update_alternative_names(link, m); |
2278 | if (r < 0) | |
8bceafa7 | 2279 | return r; |
572b21d9 | 2280 | |
170e88c8 | 2281 | r = link_get_network(link, &network); |
ad932b15 YW |
2282 | if (r == -ENOENT) { |
2283 | link_enter_unmanaged(link); | |
2284 | return 0; | |
170e88c8 YW |
2285 | } |
2286 | if (r < 0) | |
ad932b15 YW |
2287 | return r; |
2288 | ||
99b8517c | 2289 | if (link->network == network && !force) |
ad932b15 YW |
2290 | return 0; |
2291 | ||
2292 | log_link_info(link, "Re-configuring with %s", network->filename); | |
2293 | ||
2294 | /* Dropping old .network file */ | |
2a99eed0 | 2295 | r = link_stop_engines(link, false); |
572b21d9 | 2296 | if (r < 0) |
ad932b15 | 2297 | return r; |
ad932b15 | 2298 | |
19d9a5ad YW |
2299 | link_drop_requests(link); |
2300 | ||
ad932b15 YW |
2301 | r = link_drop_config(link); |
2302 | if (r < 0) | |
2303 | return r; | |
2304 | ||
2c7b826d | 2305 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
942cf4b8 | 2306 | log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
ad932b15 YW |
2307 | r = link_drop_foreign_config(link); |
2308 | if (r < 0) | |
2309 | return r; | |
2310 | } | |
2311 | ||
2312 | link_free_carrier_maps(link); | |
2313 | link_free_engines(link); | |
2314 | link->network = network_unref(link->network); | |
59c31eba | 2315 | link_unref(set_remove(link->manager->links_requesting_uuid, link)); |
ad932b15 YW |
2316 | |
2317 | /* Then, apply new .network file */ | |
9092113d YW |
2318 | link->network = network_ref(network); |
2319 | link_dirty(link); | |
ad932b15 YW |
2320 | |
2321 | r = link_new_carrier_maps(link); | |
2322 | if (r < 0) | |
2323 | return r; | |
2324 | ||
2325 | link_set_state(link, LINK_STATE_INITIALIZED); | |
61135582 | 2326 | link->activated = false; |
ad932b15 | 2327 | |
ad932b15 YW |
2328 | r = link_configure(link); |
2329 | if (r < 0) | |
2330 | return r; | |
2331 | ||
2332 | return 0; | |
2333 | } | |
2334 | ||
572b21d9 YW |
2335 | static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
2336 | int r; | |
2337 | ||
2338 | r = link_reconfigure_internal(link, m, false); | |
2339 | if (r < 0) | |
2340 | link_enter_failed(link); | |
2341 | ||
2342 | return 1; | |
2343 | } | |
2344 | ||
2345 | static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { | |
2346 | int r; | |
2347 | ||
2348 | r = link_reconfigure_internal(link, m, true); | |
2349 | if (r < 0) | |
2350 | link_enter_failed(link); | |
2351 | ||
2352 | return 1; | |
2353 | } | |
2354 | ||
2355 | int link_reconfigure(Link *link, bool force) { | |
2356 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; | |
2357 | int r; | |
2358 | ||
8bceafa7 | 2359 | /* When link in pending or initialized state, then link_configure() will be called. To prevent |
f8dd4077 ZJS |
2360 | * the function from being called multiple times simultaneously, refuse to reconfigure the |
2361 | * interface in these cases. */ | |
8bceafa7 | 2362 | if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED, LINK_STATE_LINGER)) |
f8dd4077 | 2363 | return 0; /* 0 means no-op. */ |
2c0d7ed3 | 2364 | |
572b21d9 YW |
2365 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, |
2366 | link->ifindex); | |
2367 | if (r < 0) | |
2368 | return r; | |
2369 | ||
2370 | r = netlink_call_async(link->manager->rtnl, NULL, req, | |
2371 | force ? link_force_reconfigure_handler : link_reconfigure_handler, | |
2372 | link_netlink_destroy_callback, link); | |
2373 | if (r < 0) | |
2374 | return r; | |
2375 | ||
2376 | link_ref(link); | |
2377 | ||
8bceafa7 | 2378 | return 1; /* 1 means the interface will be reconfigured. */ |
572b21d9 YW |
2379 | } |
2380 | ||
e6bf7774 | 2381 | static int link_initialized_and_synced(Link *link) { |
505f8da7 | 2382 | Network *network; |
505f8da7 TG |
2383 | int r; |
2384 | ||
2385 | assert(link); | |
2386 | assert(link->ifname); | |
2387 | assert(link->manager); | |
2388 | ||
bd08ce56 YW |
2389 | /* We may get called either from the asynchronous netlink callback, |
2390 | * or directly for link_add() if running in a container. See link_add(). */ | |
2391 | if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) | |
4232cf04 | 2392 | return 0; |
505f8da7 | 2393 | |
6a7a4e4d | 2394 | log_link_debug(link, "Link state is up-to-date"); |
bd08ce56 | 2395 | link_set_state(link, LINK_STATE_INITIALIZED); |
505f8da7 | 2396 | |
0d4ad91d AR |
2397 | r = link_new_bound_by_list(link); |
2398 | if (r < 0) | |
2399 | return r; | |
2400 | ||
2401 | r = link_handle_bound_by_list(link); | |
2402 | if (r < 0) | |
2403 | return r; | |
2404 | ||
c4a03a56 | 2405 | if (!link->network) { |
0894cfe4 | 2406 | r = wifi_get_info(link); |
8d968fdd YW |
2407 | if (r < 0) |
2408 | return r; | |
2409 | ||
170e88c8 | 2410 | r = link_get_network(link, &network); |
c4a03a56 TG |
2411 | if (r == -ENOENT) { |
2412 | link_enter_unmanaged(link); | |
4232cf04 | 2413 | return 0; |
170e88c8 YW |
2414 | } |
2415 | if (r < 0) | |
c4a03a56 | 2416 | return r; |
505f8da7 | 2417 | |
c4a03a56 TG |
2418 | if (link->flags & IFF_LOOPBACK) { |
2419 | if (network->link_local != ADDRESS_FAMILY_NO) | |
2420 | log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link"); | |
78c958f8 | 2421 | |
c4a03a56 TG |
2422 | if (network->dhcp != ADDRESS_FAMILY_NO) |
2423 | log_link_debug(link, "Ignoring DHCP clients for loopback link"); | |
78c958f8 | 2424 | |
c4a03a56 TG |
2425 | if (network->dhcp_server) |
2426 | log_link_debug(link, "Ignoring DHCP server for loopback link"); | |
2427 | } | |
bd2efe92 | 2428 | |
9092113d | 2429 | link->network = network_ref(network); |
bcdcc596 | 2430 | link_update_operstate(link, false); |
9092113d | 2431 | link_dirty(link); |
c4a03a56 | 2432 | } |
505f8da7 | 2433 | |
0d4ad91d AR |
2434 | r = link_new_bound_to_list(link); |
2435 | if (r < 0) | |
2436 | return r; | |
2437 | ||
a748b692 TG |
2438 | r = link_configure(link); |
2439 | if (r < 0) | |
2440 | return r; | |
2441 | ||
4232cf04 | 2442 | return 0; |
505f8da7 TG |
2443 | } |
2444 | ||
302a796f | 2445 | static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
4ff296b0 YW |
2446 | int r; |
2447 | ||
572b21d9 YW |
2448 | r = sd_netlink_message_get_errno(m); |
2449 | if (r < 0) { | |
40681e5c | 2450 | log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m"); |
572b21d9 YW |
2451 | link_enter_failed(link); |
2452 | return 0; | |
2453 | } | |
2454 | ||
0b54c870 YW |
2455 | r = link_update_alternative_names(link, m); |
2456 | if (r < 0) { | |
572b21d9 | 2457 | link_enter_failed(link); |
0b54c870 | 2458 | return r; |
572b21d9 YW |
2459 | } |
2460 | ||
4ff296b0 YW |
2461 | r = link_initialized_and_synced(link); |
2462 | if (r < 0) | |
2463 | link_enter_failed(link); | |
e6bf7774 YW |
2464 | return 1; |
2465 | } | |
2466 | ||
3be9d62a | 2467 | static int link_initialized(Link *link, sd_device *device) { |
4afd3348 | 2468 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
4f561e8e TG |
2469 | int r; |
2470 | ||
2471 | assert(link); | |
2472 | assert(link->manager); | |
2473 | assert(link->manager->rtnl); | |
2474 | assert(device); | |
2475 | ||
8434fd5c | 2476 | if (link->state != LINK_STATE_PENDING) |
4f561e8e TG |
2477 | return 0; |
2478 | ||
51517f9e | 2479 | if (link->sd_device) |
679b3605 TG |
2480 | return 0; |
2481 | ||
79008bdd | 2482 | log_link_debug(link, "udev initialized link"); |
bd08ce56 | 2483 | link_set_state(link, LINK_STATE_INITIALIZED); |
4f561e8e | 2484 | |
51517f9e | 2485 | link->sd_device = sd_device_ref(device); |
4f561e8e | 2486 | |
3c9b8860 TG |
2487 | /* udev has initialized the link, but we don't know if we have yet |
2488 | * processed the NEWLINK messages with the latest state. Do a GETLINK, | |
2489 | * when it returns we know that the pending NEWLINKs have already been | |
2490 | * processed and that we are up-to-date */ | |
4f561e8e | 2491 | |
3c9b8860 TG |
2492 | r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK, |
2493 | link->ifindex); | |
4f561e8e TG |
2494 | if (r < 0) |
2495 | return r; | |
2496 | ||
302a796f YW |
2497 | r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler, |
2498 | link_netlink_destroy_callback, link); | |
4f561e8e TG |
2499 | if (r < 0) |
2500 | return r; | |
2501 | ||
5da8149f TG |
2502 | link_ref(link); |
2503 | ||
4f561e8e TG |
2504 | return 0; |
2505 | } | |
2506 | ||
cc2d7efc YW |
2507 | static Link *link_drop_or_unref(Link *link) { |
2508 | if (!link) | |
2509 | return NULL; | |
2510 | if (!link->manager) | |
2511 | return link_unref(link); | |
2512 | return link_drop(link); | |
2513 | } | |
2514 | ||
2515 | DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_drop_or_unref); | |
2516 | ||
2517 | static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) { | |
2518 | _cleanup_(link_drop_or_unrefp) Link *link = NULL; | |
2519 | _cleanup_free_ char *ifname = NULL, *kind = NULL; | |
2520 | unsigned short iftype; | |
2521 | int r, ifindex; | |
2522 | uint16_t type; | |
2523 | ||
2524 | assert(manager); | |
2525 | assert(message); | |
2526 | assert(ret); | |
2527 | ||
2528 | r = sd_netlink_message_get_type(message, &type); | |
2529 | if (r < 0) | |
2530 | return r; | |
2531 | else if (type != RTM_NEWLINK) | |
2532 | return -EINVAL; | |
2533 | ||
2534 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
2535 | if (r < 0) | |
2536 | return r; | |
2537 | else if (ifindex <= 0) | |
2538 | return -EINVAL; | |
2539 | ||
2540 | r = sd_rtnl_message_link_get_type(message, &iftype); | |
2541 | if (r < 0) | |
2542 | return r; | |
2543 | ||
2544 | r = sd_netlink_message_read_string_strdup(message, IFLA_IFNAME, &ifname); | |
2545 | if (r < 0) | |
2546 | return r; | |
2547 | ||
2548 | /* check for link kind */ | |
2549 | r = sd_netlink_message_enter_container(message, IFLA_LINKINFO); | |
2550 | if (r >= 0) { | |
2551 | (void) sd_netlink_message_read_string_strdup(message, IFLA_INFO_KIND, &kind); | |
2552 | r = sd_netlink_message_exit_container(message); | |
2553 | if (r < 0) | |
2554 | return r; | |
2555 | } | |
2556 | ||
2557 | link = new(Link, 1); | |
2558 | if (!link) | |
2559 | return -ENOMEM; | |
2560 | ||
2561 | *link = (Link) { | |
2562 | .n_ref = 1, | |
2563 | .state = LINK_STATE_PENDING, | |
bcdcc596 | 2564 | .online_state = _LINK_ONLINE_STATE_INVALID, |
cc2d7efc YW |
2565 | .ifindex = ifindex, |
2566 | .iftype = iftype, | |
2567 | .ifname = TAKE_PTR(ifname), | |
2568 | .kind = TAKE_PTR(kind), | |
2569 | ||
2570 | .n_dns = UINT_MAX, | |
2571 | .dns_default_route = -1, | |
2572 | .llmnr = _RESOLVE_SUPPORT_INVALID, | |
2573 | .mdns = _RESOLVE_SUPPORT_INVALID, | |
2574 | .dnssec_mode = _DNSSEC_MODE_INVALID, | |
2575 | .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID, | |
2576 | }; | |
2577 | ||
2578 | r = hashmap_ensure_put(&manager->links, NULL, INT_TO_PTR(link->ifindex), link); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | ||
2582 | link->manager = manager; | |
2583 | ||
2584 | r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t*) &link->master_ifindex); | |
2585 | if (r < 0) | |
2586 | log_link_debug_errno(link, r, "New device has no master, continuing without"); | |
2587 | ||
2588 | r = netlink_message_read_hw_addr(message, IFLA_ADDRESS, &link->hw_addr); | |
2589 | if (r < 0) | |
2590 | log_link_debug_errno(link, r, "Hardware address not found for new device, continuing without"); | |
2591 | ||
2592 | r = netlink_message_read_hw_addr(message, IFLA_BROADCAST, &link->bcast_addr); | |
2593 | if (r < 0) | |
2594 | log_link_debug_errno(link, r, "Broadcast address not found for new device, continuing without"); | |
2595 | ||
2596 | r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac); | |
2597 | if (r < 0) | |
2598 | log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m"); | |
2599 | ||
2600 | r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver); | |
2601 | if (r < 0) | |
2602 | log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m"); | |
2603 | ||
cc2d7efc YW |
2604 | if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0) |
2605 | return -ENOMEM; | |
2606 | ||
2607 | if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0) | |
2608 | return -ENOMEM; | |
2609 | ||
2610 | if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0) | |
2611 | return -ENOMEM; | |
2612 | ||
0b54c870 YW |
2613 | r = hashmap_ensure_put(&manager->links_by_name, &string_hash_ops, link->ifname, link); |
2614 | if (r < 0) | |
2615 | return r; | |
2616 | ||
2617 | r = link_update_alternative_names(link, message); | |
2618 | if (r < 0) | |
2619 | return r; | |
2620 | ||
cc2d7efc YW |
2621 | r = link_update_flags(link, message, false); |
2622 | if (r < 0) | |
2623 | return r; | |
2624 | ||
2625 | *ret = TAKE_PTR(link); | |
2626 | ||
2627 | return 0; | |
2628 | } | |
2629 | ||
3be9d62a | 2630 | static int link_add(Manager *m, sd_netlink_message *message, Link **ret) { |
51517f9e | 2631 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
505f8da7 | 2632 | char ifindex_str[2 + DECIMAL_STR_MAX(int)]; |
51517f9e | 2633 | Link *link; |
5a937ea2 | 2634 | int r; |
505f8da7 TG |
2635 | |
2636 | assert(m); | |
fbbeb65a | 2637 | assert(m->rtnl); |
505f8da7 TG |
2638 | assert(message); |
2639 | assert(ret); | |
2640 | ||
2641 | r = link_new(m, message, ret); | |
2642 | if (r < 0) | |
2643 | return r; | |
2644 | ||
2645 | link = *ret; | |
2646 | ||
6a7a4e4d | 2647 | log_link_debug(link, "Link %d added", link->ifindex); |
505f8da7 | 2648 | |
bf331d87 YW |
2649 | if (path_is_read_only_fs("/sys") <= 0) { |
2650 | /* udev should be around */ | |
ae06ab10 | 2651 | sprintf(ifindex_str, "n%d", link->ifindex); |
51517f9e YW |
2652 | r = sd_device_new_from_device_id(&device, ifindex_str); |
2653 | if (r < 0) { | |
83e7c37b | 2654 | log_link_debug_errno(link, r, "Could not find device, waiting for device initialization: %m"); |
4d59e14f | 2655 | return 0; |
5c416fc4 | 2656 | } |
505f8da7 | 2657 | |
5a937ea2 | 2658 | r = sd_device_get_is_initialized(device); |
51517f9e | 2659 | if (r < 0) { |
bf331d87 | 2660 | log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m"); |
51517f9e YW |
2661 | goto failed; |
2662 | } | |
5a937ea2 | 2663 | if (r == 0) { |
505f8da7 | 2664 | /* not yet ready */ |
79008bdd | 2665 | log_link_debug(link, "link pending udev initialization..."); |
505f8da7 | 2666 | return 0; |
3c4cb064 | 2667 | } |
505f8da7 | 2668 | |
299ad32d YW |
2669 | r = device_is_renaming(device); |
2670 | if (r < 0) { | |
bf331d87 | 2671 | log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m"); |
299ad32d YW |
2672 | goto failed; |
2673 | } | |
2674 | if (r > 0) { | |
bf331d87 | 2675 | log_link_debug(link, "Interface is being renamed, pending initialization."); |
299ad32d YW |
2676 | return 0; |
2677 | } | |
2678 | ||
4f561e8e TG |
2679 | r = link_initialized(link, device); |
2680 | if (r < 0) | |
5c416fc4 | 2681 | goto failed; |
4f561e8e | 2682 | } else { |
e6bf7774 | 2683 | r = link_initialized_and_synced(link); |
4f561e8e | 2684 | if (r < 0) |
5c416fc4 | 2685 | goto failed; |
4f561e8e | 2686 | } |
505f8da7 | 2687 | |
a748b692 | 2688 | return 0; |
5c416fc4 TG |
2689 | failed: |
2690 | link_enter_failed(link); | |
2691 | return r; | |
a748b692 TG |
2692 | } |
2693 | ||
c601ebf7 | 2694 | int link_ipv6ll_gained(Link *link, const struct in6_addr *address) { |
e7ab854c TG |
2695 | int r; |
2696 | ||
2697 | assert(link); | |
2698 | ||
2699 | log_link_info(link, "Gained IPv6LL"); | |
2700 | ||
c601ebf7 | 2701 | link->ipv6ll_address = *address; |
e7ab854c TG |
2702 | link_check_ready(link); |
2703 | ||
b9ea3d2e | 2704 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
e7ab854c TG |
2705 | r = link_acquire_ipv6_conf(link); |
2706 | if (r < 0) { | |
2707 | link_enter_failed(link); | |
2708 | return r; | |
2709 | } | |
2710 | } | |
2711 | ||
2712 | return 0; | |
2713 | } | |
2714 | ||
3be9d62a YW |
2715 | int manager_udev_process_link(sd_device_monitor *monitor, sd_device *device, void *userdata) { |
2716 | sd_device_action_t action; | |
2717 | Manager *m = userdata; | |
2718 | Link *link = NULL; | |
2719 | int r, ifindex; | |
2720 | ||
2721 | assert(m); | |
2722 | assert(device); | |
2723 | ||
2724 | r = sd_device_get_action(device, &action); | |
2725 | if (r < 0) { | |
2726 | log_device_debug_errno(device, r, "Failed to get udev action, ignoring device: %m"); | |
2727 | return 0; | |
2728 | } | |
2729 | ||
2730 | /* Ignore the "remove" uevent — let's remove a device only if rtnetlink says so. All other uevents | |
2731 | * are "positive" events in some form, i.e. inform us about a changed or new network interface, that | |
2732 | * still exists — and we are interested in that. */ | |
2733 | if (action == SD_DEVICE_REMOVE) | |
2734 | return 0; | |
2735 | ||
2736 | r = sd_device_get_ifindex(device, &ifindex); | |
2737 | if (r < 0) { | |
2738 | log_device_debug_errno(device, r, "Ignoring udev %s event for device without ifindex or with invalid ifindex: %m", | |
2739 | device_action_to_string(action)); | |
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | r = device_is_renaming(device); | |
2744 | if (r < 0) { | |
2745 | log_device_error_errno(device, r, "Failed to determine the device is renamed or not, ignoring '%s' uevent: %m", | |
2746 | device_action_to_string(action)); | |
2747 | return 0; | |
2748 | } | |
2749 | if (r > 0) { | |
2750 | log_device_debug(device, "Interface is under renaming, wait for the interface to be renamed."); | |
2751 | return 0; | |
2752 | } | |
2753 | ||
2754 | r = link_get(m, ifindex, &link); | |
2755 | if (r < 0) { | |
2756 | if (r != -ENODEV) | |
2757 | log_debug_errno(r, "Failed to get link from ifindex %i, ignoring: %m", ifindex); | |
2758 | return 0; | |
2759 | } | |
2760 | ||
2761 | (void) link_initialized(link, device); | |
2762 | ||
2763 | return 0; | |
2764 | } | |
2765 | ||
9c0a72f9 TG |
2766 | static int link_carrier_gained(Link *link) { |
2767 | int r; | |
2768 | ||
2769 | assert(link); | |
2770 | ||
600b7898 YW |
2771 | if (link->iftype == ARPHRD_CAN) |
2772 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
2773 | return link_handle_bound_by_list(link); | |
2774 | ||
0894cfe4 | 2775 | r = wifi_get_info(link); |
8d968fdd YW |
2776 | if (r < 0) |
2777 | return r; | |
2778 | if (r > 0) { | |
8bceafa7 | 2779 | r = link_reconfigure(link, false); |
572b21d9 YW |
2780 | if (r < 0) { |
2781 | link_enter_failed(link); | |
8d968fdd | 2782 | return r; |
572b21d9 | 2783 | } |
8d968fdd YW |
2784 | } |
2785 | ||
b9ea3d2e | 2786 | if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) { |
9c0a72f9 TG |
2787 | r = link_acquire_conf(link); |
2788 | if (r < 0) { | |
2789 | link_enter_failed(link); | |
2790 | return r; | |
2791 | } | |
6fc25497 | 2792 | |
b425c3ae | 2793 | link_set_state(link, LINK_STATE_CONFIGURING); |
682c65b0 | 2794 | r = link_set_static_configs(link); |
6fc25497 SS |
2795 | if (r < 0) |
2796 | return r; | |
9c0a72f9 TG |
2797 | } |
2798 | ||
0d4ad91d AR |
2799 | r = link_handle_bound_by_list(link); |
2800 | if (r < 0) | |
2801 | return r; | |
2802 | ||
1f241589 YW |
2803 | if (!link->bridge_mdb_configured) { |
2804 | r = link_set_bridge_mdb(link); | |
2805 | if (r < 0) | |
2806 | return r; | |
2807 | } | |
2808 | ||
2809 | if (streq_ptr(link->kind, "bridge")) { | |
2810 | Link *slave; | |
2811 | ||
2812 | SET_FOREACH(slave, link->slaves) { | |
2813 | if (slave->bridge_mdb_configured) | |
2814 | continue; | |
2815 | ||
2816 | r = link_set_bridge_mdb(slave); | |
2817 | if (r < 0) | |
2818 | link_enter_failed(slave); | |
2819 | } | |
2820 | } | |
3db468ea | 2821 | |
9c0a72f9 TG |
2822 | return 0; |
2823 | } | |
2824 | ||
2825 | static int link_carrier_lost(Link *link) { | |
2826 | int r; | |
2827 | ||
2828 | assert(link); | |
2829 | ||
25e992ba | 2830 | if (link->network && link->network->ignore_carrier_loss) |
93b4dab5 SS |
2831 | return 0; |
2832 | ||
600b7898 YW |
2833 | if (link->iftype == ARPHRD_CAN) |
2834 | /* let's shortcut things for CAN which doesn't need most of what's done below. */ | |
2835 | return link_handle_bound_by_list(link); | |
2836 | ||
fbdb6605 | 2837 | /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop. |
55dc8c4a YW |
2838 | * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the |
2839 | * configuration and stop the clients as well. */ | |
97e7fb39 SS |
2840 | if (link->setting_mtu) |
2841 | return 0; | |
2842 | ||
2a99eed0 | 2843 | r = link_stop_engines(link, false); |
9c0a72f9 TG |
2844 | if (r < 0) { |
2845 | link_enter_failed(link); | |
2846 | return r; | |
2847 | } | |
2848 | ||
19d9a5ad YW |
2849 | link_drop_requests(link); |
2850 | ||
3104883d SS |
2851 | r = link_drop_config(link); |
2852 | if (r < 0) | |
2853 | return r; | |
2854 | ||
2c7b826d | 2855 | if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) { |
942cf4b8 | 2856 | log_link_debug(link, "State is %s, dropping foreign config", link_state_to_string(link->state)); |
c436d553 MM |
2857 | r = link_drop_foreign_config(link); |
2858 | if (r < 0) | |
2859 | return r; | |
2860 | } | |
3104883d | 2861 | |
0d4ad91d AR |
2862 | r = link_handle_bound_by_list(link); |
2863 | if (r < 0) | |
2864 | return r; | |
2865 | ||
9c0a72f9 TG |
2866 | return 0; |
2867 | } | |
2868 | ||
2869 | int link_carrier_reset(Link *link) { | |
2870 | int r; | |
2871 | ||
2872 | assert(link); | |
2873 | ||
2874 | if (link_has_carrier(link)) { | |
2875 | r = link_carrier_lost(link); | |
2876 | if (r < 0) | |
2877 | return r; | |
2878 | ||
2879 | r = link_carrier_gained(link); | |
2880 | if (r < 0) | |
2881 | return r; | |
2882 | ||
6a7a4e4d | 2883 | log_link_info(link, "Reset carrier"); |
9c0a72f9 TG |
2884 | } |
2885 | ||
2886 | return 0; | |
2887 | } | |
2888 | ||
d236718c DS |
2889 | static int link_admin_state_up(Link *link) { |
2890 | int r; | |
2891 | ||
61135582 DS |
2892 | assert(link); |
2893 | ||
3be9d62a YW |
2894 | /* This is called every time an interface admin state changes to up; |
2895 | * specifically, when IFF_UP flag changes from unset to set. */ | |
2896 | ||
61135582 DS |
2897 | if (!link->network) |
2898 | return 0; | |
2899 | ||
2900 | if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_DOWN) { | |
2901 | log_link_info(link, "ActivationPolicy is \"always-off\", forcing link down"); | |
2902 | return link_down(link, NULL); | |
2903 | } | |
2904 | ||
d236718c DS |
2905 | /* We set the ipv6 mtu after the device mtu, but the kernel resets |
2906 | * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for | |
2907 | * ipv6_mtu_set prevents this from trying to set it too early before | |
2908 | * the link->network has been setup; we only need to reset it | |
2909 | * here if we've already set it during normal initialization. */ | |
2910 | if (link->ipv6_mtu_set) { | |
2911 | r = link_set_ipv6_mtu(link); | |
2912 | if (r < 0) | |
2913 | return r; | |
2914 | } | |
2915 | ||
2916 | return 0; | |
2917 | } | |
2918 | ||
61135582 | 2919 | static int link_admin_state_down(Link *link) { |
61135582 DS |
2920 | assert(link); |
2921 | ||
2922 | if (!link->network) | |
2923 | return 0; | |
2924 | ||
2925 | if (link->network->activation_policy == ACTIVATION_POLICY_ALWAYS_UP) { | |
36161cba YW |
2926 | if (streq_ptr(link->kind, "can") && !link->can_configured) |
2927 | /* CAN device needs to be down on configure. */ | |
2928 | return 0; | |
2929 | ||
61135582 DS |
2930 | log_link_info(link, "ActivationPolicy is \"always-on\", forcing link up"); |
2931 | return link_up(link); | |
2932 | } | |
2933 | ||
2934 | return 0; | |
2935 | } | |
2936 | ||
3be9d62a | 2937 | static int link_update(Link *link, sd_netlink_message *m) { |
b8162cd2 | 2938 | hw_addr_data hw_addr; |
ca4e095a | 2939 | const char *ifname; |
afe7fd56 | 2940 | uint32_t mtu; |
d236718c | 2941 | bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up; |
bb262ef0 | 2942 | int old_master, r; |
22936833 | 2943 | |
dd3efc09 | 2944 | assert(link); |
b8941f74 | 2945 | assert(link->ifname); |
22936833 TG |
2946 | assert(m); |
2947 | ||
7619683b | 2948 | if (link->state == LINK_STATE_LINGER) { |
5238e957 | 2949 | log_link_info(link, "Link re-added"); |
289e6774 | 2950 | link_set_state(link, LINK_STATE_CONFIGURING); |
0d4ad91d AR |
2951 | |
2952 | r = link_new_carrier_maps(link); | |
2953 | if (r < 0) | |
2954 | return r; | |
7619683b TG |
2955 | } |
2956 | ||
1c4baffc | 2957 | r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname); |
b8941f74 | 2958 | if (r >= 0 && !streq(ifname, link->ifname)) { |
30de2b89 | 2959 | Manager *manager = link->manager; |
b8941f74 | 2960 | |
30de2b89 | 2961 | log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname); |
0d4ad91d | 2962 | |
30de2b89 YW |
2963 | link_drop(link); |
2964 | r = link_add(manager, m, &link); | |
2965 | if (r < 0) | |
2966 | return r; | |
0b54c870 YW |
2967 | } else { |
2968 | r = link_update_alternative_names(link, m); | |
2969 | if (r < 0) | |
2970 | return r; | |
b8941f74 TG |
2971 | } |
2972 | ||
1c4baffc | 2973 | r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu); |
afe7fd56 TG |
2974 | if (r >= 0 && mtu > 0) { |
2975 | link->mtu = mtu; | |
4e964aa0 | 2976 | if (link->original_mtu == 0) { |
afe7fd56 | 2977 | link->original_mtu = mtu; |
6a7a4e4d | 2978 | log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu); |
afe7fd56 TG |
2979 | } |
2980 | ||
2981 | if (link->dhcp_client) { | |
3c9b8860 TG |
2982 | r = sd_dhcp_client_set_mtu(link->dhcp_client, |
2983 | link->mtu); | |
fc95c359 YW |
2984 | if (r < 0) |
2985 | return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m"); | |
afe7fd56 | 2986 | } |
7465dd22 PF |
2987 | |
2988 | if (link->radv) { | |
2989 | r = sd_radv_set_mtu(link->radv, link->mtu); | |
2990 | if (r < 0) | |
2991 | return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m"); | |
2992 | } | |
9842de0d | 2993 | } |
69629de9 | 2994 | |
e9189a1f TG |
2995 | /* The kernel may broadcast NEWLINK messages without the MAC address |
2996 | set, simply ignore them. */ | |
b8162cd2 TR |
2997 | r = netlink_message_read_hw_addr(m, IFLA_ADDRESS, &hw_addr); |
2998 | if (r >= 0 && (link->hw_addr.length != hw_addr.length || | |
2999 | memcmp(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length) != 0)) { | |
807667f7 | 3000 | |
b8162cd2 | 3001 | memcpy(link->hw_addr.addr.bytes, hw_addr.addr.bytes, hw_addr.length); |
807667f7 | 3002 | |
b8162cd2 | 3003 | log_link_debug(link, "Gained new hardware address: %s", HW_ADDR_TO_STR(&hw_addr)); |
807667f7 | 3004 | |
a3adb4a6 YW |
3005 | r = ipv4ll_update_mac(link); |
3006 | if (r < 0) | |
3007 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m"); | |
807667f7 | 3008 | |
d947f7f9 YW |
3009 | r = dhcp4_update_mac(link); |
3010 | if (r < 0) | |
3011 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m"); | |
413708d1 | 3012 | |
eebba6dc YW |
3013 | r = dhcp6_update_mac(link); |
3014 | if (r < 0) | |
3015 | return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m"); | |
7465dd22 | 3016 | |
d0c4275c | 3017 | r = radv_update_mac(link); |
be9363cc YW |
3018 | if (r < 0) |
3019 | return log_link_warning_errno(link, r, "Could not update MAC address for Router Advertisement: %m"); | |
807667f7 YW |
3020 | |
3021 | if (link->ndisc) { | |
b8162cd2 | 3022 | r = sd_ndisc_set_mac(link->ndisc, &link->hw_addr.addr.ether); |
807667f7 YW |
3023 | if (r < 0) |
3024 | return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m"); | |
3025 | } | |
d93d655c | 3026 | |
dfc58b47 YW |
3027 | if (link->lldp) { |
3028 | r = sd_lldp_set_filter_address(link->lldp, &link->hw_addr.addr.ether); | |
3029 | if (r < 0) | |
3030 | return log_link_warning_errno(link, r, "Could not update MAC address for LLDP: %m"); | |
3031 | } | |
3032 | ||
d93d655c YW |
3033 | r = ipv4_dad_update_mac(link); |
3034 | if (r < 0) | |
3035 | return log_link_warning_errno(link, r, "Could not update MAC address in IPv4 ACD client: %m"); | |
4f882b2a TG |
3036 | } |
3037 | ||
bb262ef0 YW |
3038 | old_master = link->master_ifindex; |
3039 | (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex); | |
3040 | ||
d236718c | 3041 | link_was_admin_up = link->flags & IFF_UP; |
a61bb41c TG |
3042 | had_carrier = link_has_carrier(link); |
3043 | ||
bb262ef0 | 3044 | r = link_update_flags(link, m, old_master != link->master_ifindex); |
a61bb41c TG |
3045 | if (r < 0) |
3046 | return r; | |
3047 | ||
d236718c DS |
3048 | if (!link_was_admin_up && (link->flags & IFF_UP)) { |
3049 | log_link_info(link, "Link UP"); | |
3050 | ||
3051 | r = link_admin_state_up(link); | |
3052 | if (r < 0) | |
3053 | return r; | |
61135582 | 3054 | } else if (link_was_admin_up && !(link->flags & IFF_UP)) { |
d236718c DS |
3055 | log_link_info(link, "Link DOWN"); |
3056 | ||
61135582 DS |
3057 | r = link_admin_state_down(link); |
3058 | if (r < 0) | |
3059 | return r; | |
3060 | } | |
3061 | ||
273eec24 LP |
3062 | r = link_update_lldp(link); |
3063 | if (r < 0) | |
3064 | return r; | |
3065 | ||
a61bb41c TG |
3066 | carrier_gained = !had_carrier && link_has_carrier(link); |
3067 | carrier_lost = had_carrier && !link_has_carrier(link); | |
3068 | ||
3069 | if (carrier_gained) { | |
6a7a4e4d | 3070 | log_link_info(link, "Gained carrier"); |
a61bb41c | 3071 | |
9c0a72f9 TG |
3072 | r = link_carrier_gained(link); |
3073 | if (r < 0) | |
3074 | return r; | |
a61bb41c | 3075 | } else if (carrier_lost) { |
6a7a4e4d | 3076 | log_link_info(link, "Lost carrier"); |
a61bb41c | 3077 | |
9c0a72f9 TG |
3078 | r = link_carrier_lost(link); |
3079 | if (r < 0) | |
a61bb41c | 3080 | return r; |
a61bb41c TG |
3081 | } |
3082 | ||
3083 | return 0; | |
dd3efc09 | 3084 | } |
fe8db0c5 | 3085 | |
3be9d62a YW |
3086 | int manager_rtnl_process_link(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) { |
3087 | Link *link = NULL; | |
3088 | NetDev *netdev = NULL; | |
3089 | uint16_t type; | |
3090 | const char *name; | |
3091 | int r, ifindex; | |
3092 | ||
3093 | assert(rtnl); | |
3094 | assert(message); | |
3095 | assert(m); | |
3096 | ||
3097 | if (sd_netlink_message_is_error(message)) { | |
3098 | r = sd_netlink_message_get_errno(message); | |
3099 | if (r < 0) | |
3100 | log_message_warning_errno(message, r, "rtnl: Could not receive link message, ignoring"); | |
3101 | ||
3102 | return 0; | |
3103 | } | |
3104 | ||
3105 | r = sd_netlink_message_get_type(message, &type); | |
3106 | if (r < 0) { | |
3107 | log_warning_errno(r, "rtnl: Could not get message type, ignoring: %m"); | |
3108 | return 0; | |
3109 | } else if (!IN_SET(type, RTM_NEWLINK, RTM_DELLINK)) { | |
3110 | log_warning("rtnl: Received unexpected message type %u when processing link, ignoring.", type); | |
3111 | return 0; | |
3112 | } | |
3113 | ||
3114 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); | |
3115 | if (r < 0) { | |
3116 | log_warning_errno(r, "rtnl: Could not get ifindex from link message, ignoring: %m"); | |
3117 | return 0; | |
3118 | } else if (ifindex <= 0) { | |
3119 | log_warning("rtnl: received link message with invalid ifindex %d, ignoring.", ifindex); | |
3120 | return 0; | |
3121 | } | |
3122 | ||
3123 | r = sd_netlink_message_read_string(message, IFLA_IFNAME, &name); | |
3124 | if (r < 0) { | |
3125 | log_warning_errno(r, "rtnl: Received link message without ifname, ignoring: %m"); | |
3126 | return 0; | |
3127 | } | |
3128 | ||
3129 | (void) link_get(m, ifindex, &link); | |
3130 | (void) netdev_get(m, name, &netdev); | |
3131 | ||
3132 | switch (type) { | |
3133 | case RTM_NEWLINK: | |
3134 | if (!link) { | |
3135 | /* link is new, so add it */ | |
3136 | r = link_add(m, message, &link); | |
3137 | if (r < 0) { | |
3138 | log_warning_errno(r, "Could not process new link message, ignoring: %m"); | |
3139 | return 0; | |
3140 | } | |
3141 | } | |
3142 | ||
3143 | if (netdev) { | |
3144 | /* netdev exists, so make sure the ifindex matches */ | |
3145 | r = netdev_set_ifindex(netdev, message); | |
3146 | if (r < 0) { | |
3147 | log_warning_errno(r, "Could not process new link message for netdev, ignoring: %m"); | |
3148 | return 0; | |
3149 | } | |
3150 | } | |
3151 | ||
3152 | r = link_update(link, message); | |
3153 | if (r < 0) { | |
3154 | log_warning_errno(r, "Could not process link message, ignoring: %m"); | |
3155 | return 0; | |
3156 | } | |
3157 | ||
3158 | break; | |
3159 | ||
3160 | case RTM_DELLINK: | |
3161 | link_drop(link); | |
3162 | netdev_drop(netdev); | |
3163 | ||
3164 | break; | |
3165 | ||
3166 | default: | |
3167 | assert_not_reached("Received link message with invalid RTNL message type."); | |
3168 | } | |
3169 | ||
3170 | return 1; | |
3171 | } | |
3172 | ||
fe8db0c5 | 3173 | static const char* const link_state_table[_LINK_STATE_MAX] = { |
8434fd5c | 3174 | [LINK_STATE_PENDING] = "pending", |
bd08ce56 | 3175 | [LINK_STATE_INITIALIZED] = "initialized", |
289e6774 | 3176 | [LINK_STATE_CONFIGURING] = "configuring", |
fe8db0c5 | 3177 | [LINK_STATE_CONFIGURED] = "configured", |
57bd6899 | 3178 | [LINK_STATE_UNMANAGED] = "unmanaged", |
fe8db0c5 | 3179 | [LINK_STATE_FAILED] = "failed", |
370e9930 | 3180 | [LINK_STATE_LINGER] = "linger", |
fe8db0c5 TG |
3181 | }; |
3182 | ||
3183 | DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState); |