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f579559b TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <netinet/ether.h> | |
23 | #include <linux/if.h> | |
24 | ||
25 | #include "networkd.h" | |
26 | #include "libudev-private.h" | |
27 | #include "util.h" | |
28 | ||
29 | int link_new(Manager *manager, struct udev_device *device, Link **ret) { | |
30 | _cleanup_link_free_ Link *link = NULL; | |
8cd11a0f | 31 | const char *mac; |
602cc437 | 32 | struct ether_addr *mac_addr; |
c166a070 | 33 | const char *ifname; |
f579559b TG |
34 | int r; |
35 | ||
36 | assert(device); | |
37 | assert(ret); | |
38 | ||
39 | link = new0(Link, 1); | |
40 | if (!link) | |
41 | return -ENOMEM; | |
42 | ||
5a3eb5a7 TG |
43 | link->manager = manager; |
44 | link->state = _LINK_STATE_INVALID; | |
45 | ||
0617ffab TG |
46 | link->ifindex = udev_device_get_ifindex(device); |
47 | if (link->ifindex <= 0) | |
f579559b TG |
48 | return -EINVAL; |
49 | ||
8cd11a0f | 50 | mac = udev_device_get_sysattr_value(device, "address"); |
5a3eb5a7 TG |
51 | if (mac) { |
52 | mac_addr = ether_aton(mac); | |
53 | if (mac_addr) | |
54 | memcpy(&link->mac, mac_addr, sizeof(struct ether_addr)); | |
55 | } | |
f579559b | 56 | |
c166a070 TG |
57 | ifname = udev_device_get_sysname(device); |
58 | link->ifname = strdup(ifname); | |
59 | ||
0617ffab | 60 | r = hashmap_put(manager->links, &link->ifindex, link); |
f579559b TG |
61 | if (r < 0) |
62 | return r; | |
63 | ||
64 | *ret = link; | |
65 | link = NULL; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | void link_free(Link *link) { | |
71 | if (!link) | |
72 | return; | |
73 | ||
0617ffab | 74 | assert(link->manager); |
f579559b | 75 | |
0617ffab | 76 | hashmap_remove(link->manager->links, &link->ifindex); |
f579559b | 77 | |
c166a070 TG |
78 | free(link->ifname); |
79 | ||
f579559b TG |
80 | free(link); |
81 | } | |
82 | ||
83 | int link_add(Manager *m, struct udev_device *device) { | |
84 | Link *link; | |
85 | Network *network; | |
86 | int r; | |
87 | uint64_t ifindex; | |
02b59d57 | 88 | const char *devtype; |
f579559b TG |
89 | |
90 | assert(m); | |
91 | assert(device); | |
92 | ||
93 | ifindex = udev_device_get_ifindex(device); | |
94 | link = hashmap_get(m->links, &ifindex); | |
95 | if (link) | |
96 | return 0; | |
97 | ||
98 | r = link_new(m, device, &link); | |
99 | if (r < 0) { | |
c166a070 | 100 | log_error("Could not create link: %s", strerror(-r)); |
f579559b TG |
101 | return r; |
102 | } | |
103 | ||
02b59d57 TG |
104 | devtype = udev_device_get_devtype(device); |
105 | if (streq_ptr(devtype, "bridge")) { | |
106 | r = bridge_set_link(m, link); | |
107 | if (r < 0) | |
108 | return r == -ENOENT ? 0 : r; | |
109 | } | |
110 | ||
f579559b TG |
111 | r = network_get(m, device, &network); |
112 | if (r < 0) | |
113 | return r == -ENOENT ? 0 : r; | |
114 | ||
115 | r = network_apply(m, network, link); | |
116 | if (r < 0) | |
117 | return r; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
f882c247 | 122 | static int link_enter_configured(Link *link) { |
ef1ba606 TG |
123 | assert(link); |
124 | assert(link->state == LINK_STATE_SETTING_ROUTES); | |
125 | ||
c166a070 | 126 | log_info("Link '%s' configured", link->ifname); |
f882c247 TG |
127 | |
128 | link->state = LINK_STATE_CONFIGURED; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
ef1ba606 TG |
133 | static void link_enter_failed(Link *link) { |
134 | assert(link); | |
f882c247 | 135 | |
ef1ba606 | 136 | link->state = LINK_STATE_FAILED; |
f882c247 TG |
137 | } |
138 | ||
f882c247 TG |
139 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
140 | Link *link = userdata; | |
141 | int r; | |
142 | ||
143 | assert(link->rtnl_messages > 0); | |
ef1ba606 | 144 | assert(link->state == LINK_STATE_SETTING_ROUTES || link->state == LINK_STATE_FAILED); |
f882c247 TG |
145 | |
146 | link->rtnl_messages --; | |
147 | ||
148 | if (link->state == LINK_STATE_FAILED) | |
149 | return 1; | |
150 | ||
151 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
152 | if (r < 0 && r != -EEXIST) |
153 | log_warning("Could not set route on interface '%s': %s", | |
154 | link->ifname, strerror(-r)); | |
f882c247 | 155 | |
dd3efc09 TG |
156 | if (link->rtnl_messages == 0) { |
157 | log_info("Routes set for link '%s'", link->ifname); | |
158 | link_enter_configured(link); | |
159 | } | |
f882c247 TG |
160 | |
161 | return 1; | |
162 | } | |
163 | ||
164 | static int link_enter_set_routes(Link *link) { | |
165 | Route *route; | |
166 | int r; | |
167 | ||
168 | assert(link); | |
169 | assert(link->network); | |
170 | assert(link->rtnl_messages == 0); | |
ef1ba606 | 171 | assert(link->state == LINK_STATE_SETTING_ADDRESSES); |
f882c247 | 172 | |
ef1ba606 | 173 | link->state = LINK_STATE_SETTING_ROUTES; |
f882c247 | 174 | |
f048a16b | 175 | if (!link->network->static_routes) |
dd3efc09 | 176 | return link_enter_configured(link); |
f882c247 | 177 | |
f048a16b | 178 | LIST_FOREACH(static_routes, route, link->network->static_routes) { |
f882c247 | 179 | r = route_configure(route, link, &route_handler); |
dd3efc09 TG |
180 | if (r < 0) { |
181 | log_warning("Could not set routes for link '%s'", link->ifname); | |
ef1ba606 TG |
182 | link_enter_failed(link); |
183 | return r; | |
dd3efc09 | 184 | } |
c166a070 TG |
185 | |
186 | link->rtnl_messages ++; | |
f882c247 TG |
187 | } |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
f882c247 TG |
192 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
193 | Link *link = userdata; | |
194 | int r; | |
195 | ||
196 | assert(link->rtnl_messages > 0); | |
ef1ba606 | 197 | assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); |
f882c247 TG |
198 | |
199 | link->rtnl_messages --; | |
200 | ||
201 | if (link->state == LINK_STATE_FAILED) | |
202 | return 1; | |
203 | ||
204 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
205 | if (r < 0 && r != -EEXIST) |
206 | log_warning("Could not set address on interface '%s': %s", | |
207 | link->ifname, strerror(-r)); | |
f882c247 | 208 | |
dd3efc09 TG |
209 | if (link->rtnl_messages == 0) { |
210 | log_info("Addresses set for link '%s'", link->ifname); | |
ef1ba606 | 211 | link_enter_set_routes(link); |
dd3efc09 | 212 | } |
f882c247 TG |
213 | |
214 | return 1; | |
215 | } | |
216 | ||
217 | static int link_enter_set_addresses(Link *link) { | |
218 | Address *address; | |
219 | int r; | |
220 | ||
221 | assert(link); | |
222 | assert(link->network); | |
ef1ba606 | 223 | assert(link->state == LINK_STATE_JOINING_BRIDGE); |
f882c247 TG |
224 | assert(link->rtnl_messages == 0); |
225 | ||
ef1ba606 | 226 | link->state = LINK_STATE_SETTING_ADDRESSES; |
f882c247 | 227 | |
f048a16b | 228 | if (!link->network->static_addresses) |
ef1ba606 | 229 | return link_enter_set_routes(link); |
f882c247 | 230 | |
f048a16b | 231 | LIST_FOREACH(static_addresses, address, link->network->static_addresses) { |
f882c247 | 232 | r = address_configure(address, link, &address_handler); |
dd3efc09 TG |
233 | if (r < 0) { |
234 | log_warning("Could not set addresses for link '%s'", link->ifname); | |
ef1ba606 TG |
235 | link_enter_failed(link); |
236 | return r; | |
dd3efc09 | 237 | } |
c166a070 TG |
238 | |
239 | link->rtnl_messages ++; | |
f882c247 TG |
240 | } |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
dd3efc09 TG |
245 | static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
246 | Link *link = userdata; | |
247 | int r; | |
248 | ||
249 | r = sd_rtnl_message_get_errno(m); | |
250 | if (r < 0) { | |
251 | log_warning("Could not bring up interface '%s': %s", | |
252 | link->ifname, strerror(-r)); | |
253 | link_enter_failed(link); | |
254 | } | |
f882c247 TG |
255 | |
256 | return 1; | |
257 | } | |
258 | ||
259 | static int link_up(Link *link) { | |
f579559b TG |
260 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
261 | int r; | |
262 | ||
f882c247 TG |
263 | assert(link); |
264 | assert(link->manager); | |
265 | assert(link->manager->rtnl); | |
266 | ||
0f49a5f7 | 267 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
f579559b | 268 | if (r < 0) { |
0f49a5f7 | 269 | log_error("Could not allocate RTM_SETLINK message"); |
f579559b TG |
270 | return r; |
271 | } | |
272 | ||
fc25d7f8 TG |
273 | r = sd_rtnl_message_link_set_flags(req, IFF_UP); |
274 | if (r < 0) { | |
275 | log_error("Could not set link flags"); | |
276 | return r; | |
277 | } | |
278 | ||
dd3efc09 | 279 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL); |
f579559b | 280 | if (r < 0) { |
f882c247 | 281 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
282 | return r; |
283 | } | |
284 | ||
f882c247 TG |
285 | return 0; |
286 | } | |
287 | ||
ef1ba606 | 288 | static int link_bridge_joined(Link *link) { |
f882c247 TG |
289 | int r; |
290 | ||
ef1ba606 TG |
291 | assert(link); |
292 | assert(link->state == LINK_STATE_JOINING_BRIDGE); | |
dd3efc09 | 293 | |
f882c247 | 294 | r = link_up(link); |
ef1ba606 TG |
295 | if (r < 0) { |
296 | link_enter_failed(link); | |
297 | return r; | |
298 | } | |
f882c247 | 299 | |
ef1ba606 TG |
300 | r = link_enter_set_addresses(link); |
301 | if (r < 0) { | |
302 | link_enter_failed(link); | |
303 | return r; | |
304 | } | |
305 | ||
306 | return 0; | |
02b59d57 TG |
307 | } |
308 | ||
309 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
310 | Link *link = userdata; | |
311 | int r; | |
312 | ||
ef1ba606 TG |
313 | assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED); |
314 | assert(link->network); | |
02b59d57 TG |
315 | |
316 | if (link->state == LINK_STATE_FAILED) | |
317 | return 1; | |
318 | ||
319 | r = sd_rtnl_message_get_errno(m); | |
ef1ba606 | 320 | if (r < 0) { |
dd3efc09 TG |
321 | log_warning("Could not join interface '%s' to bridge '%s': %s", |
322 | link->ifname, link->network->bridge->name, strerror(-r)); | |
ef1ba606 TG |
323 | link_enter_failed(link); |
324 | return 1; | |
325 | } else | |
dd3efc09 TG |
326 | log_info("Join interface '%s' to bridge: %s", |
327 | link->ifname, link->network->bridge->name); | |
02b59d57 | 328 | |
ef1ba606 | 329 | link_bridge_joined(link); |
02b59d57 TG |
330 | |
331 | return 1; | |
332 | } | |
333 | ||
334 | static int link_enter_join_bridge(Link *link) { | |
335 | int r; | |
336 | ||
337 | assert(link); | |
338 | assert(link->network); | |
ef1ba606 | 339 | assert(link->state == _LINK_STATE_INVALID); |
02b59d57 | 340 | |
ef1ba606 | 341 | link->state = LINK_STATE_JOINING_BRIDGE; |
02b59d57 | 342 | |
ef1ba606 TG |
343 | if (!link->network->bridge) |
344 | return link_bridge_joined(link); | |
02b59d57 TG |
345 | |
346 | r = bridge_join(link->network->bridge, link, &bridge_handler); | |
dd3efc09 TG |
347 | if (r < 0) { |
348 | log_warning("Could not join link '%s' to bridge '%s'", link->ifname, | |
349 | link->network->bridge->name); | |
ef1ba606 TG |
350 | link_enter_failed(link); |
351 | return r; | |
352 | } | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
358 | Link *link = userdata; | |
359 | int r; | |
360 | ||
361 | r = sd_rtnl_message_get_errno(m); | |
362 | if (r < 0) { | |
363 | log_warning("Could not get state of interface '%s': %s", | |
364 | link->ifname, strerror(-r)); | |
365 | link_enter_failed(link); | |
366 | } | |
367 | ||
368 | return 1; | |
369 | } | |
370 | ||
371 | static int link_get(Link *link) { | |
372 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
373 | int r; | |
374 | ||
375 | assert(link); | |
376 | assert(link->manager); | |
377 | assert(link->manager->rtnl); | |
378 | ||
379 | r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req); | |
380 | if (r < 0) { | |
381 | log_error("Could not allocate RTM_GETLINK message"); | |
382 | return r; | |
383 | } | |
384 | ||
385 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL); | |
386 | if (r < 0) { | |
387 | log_error("Could not send rtnetlink message: %s", strerror(-r)); | |
388 | return r; | |
dd3efc09 | 389 | } |
02b59d57 TG |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
394 | int link_configure(Link *link) { | |
395 | int r; | |
396 | ||
ef1ba606 TG |
397 | assert(link); |
398 | assert(link->network); | |
399 | assert(link->state == _LINK_STATE_INVALID); | |
400 | ||
dd3efc09 | 401 | r = link_get(link); |
ef1ba606 TG |
402 | if (r < 0) { |
403 | link_enter_failed(link); | |
404 | return r; | |
405 | } | |
dd3efc09 | 406 | |
02b59d57 | 407 | r = link_enter_join_bridge(link); |
f882c247 | 408 | if (r < 0) |
ef1ba606 | 409 | return r; |
f579559b TG |
410 | |
411 | return 0; | |
412 | } | |
dd3efc09 | 413 | |
22936833 TG |
414 | int link_update(Link *link, sd_rtnl_message *m) { |
415 | unsigned flags; | |
416 | int r; | |
417 | ||
dd3efc09 | 418 | assert(link); |
22936833 TG |
419 | assert(m); |
420 | ||
421 | r = sd_rtnl_message_link_get_flags(m, &flags); | |
422 | if (r < 0) { | |
423 | log_warning("Could not get link flags of '%s'", link->ifname); | |
424 | return r; | |
425 | } | |
dd3efc09 TG |
426 | |
427 | if (link->flags & IFF_UP && !(flags & IFF_UP)) | |
428 | log_info("Interface '%s' is down", link->ifname); | |
429 | else if (!(link->flags & IFF_UP) && flags & IFF_UP) | |
430 | log_info("Interface '%s' is up", link->ifname); | |
431 | ||
432 | if (link->flags & IFF_LOWER_UP && !(flags & IFF_LOWER_UP)) | |
433 | log_info("Interface '%s' is disconnected", link->ifname); | |
434 | else if (!(link->flags & IFF_LOWER_UP) && flags & IFF_LOWER_UP) | |
435 | log_info("Interface '%s' is connected", link->ifname); | |
436 | ||
437 | link->flags = flags; | |
438 | ||
439 | return 0; | |
440 | } |