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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) { |
c166a070 | 123 | log_info("Link '%s' configured", link->ifname); |
f882c247 TG |
124 | |
125 | link->state = LINK_STATE_CONFIGURED; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int link_enter_failed(Link *link) { | |
c166a070 | 131 | log_warning("Could not configure link '%s'", link->ifname); |
f882c247 TG |
132 | |
133 | link->state = LINK_STATE_FAILED; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static bool link_is_up(Link *link) { | |
139 | return link->flags & IFF_UP; | |
140 | } | |
141 | ||
142 | static int link_enter_routes_set(Link *link) { | |
c166a070 | 143 | log_info("Routes set for link '%s'", link->ifname); |
f882c247 TG |
144 | |
145 | if (link_is_up(link)) | |
146 | return link_enter_configured(link); | |
147 | ||
148 | link->state = LINK_STATE_ROUTES_SET; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
154 | Link *link = userdata; | |
155 | int r; | |
156 | ||
157 | assert(link->rtnl_messages > 0); | |
158 | assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED); | |
159 | ||
160 | link->rtnl_messages --; | |
161 | ||
162 | if (link->state == LINK_STATE_FAILED) | |
163 | return 1; | |
164 | ||
165 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
166 | if (r < 0 && r != -EEXIST) |
167 | log_warning("Could not set route on interface '%s': %s", | |
168 | link->ifname, strerror(-r)); | |
f882c247 TG |
169 | |
170 | if (link->rtnl_messages == 0) | |
171 | return link_enter_routes_set(link); | |
172 | ||
173 | return 1; | |
174 | } | |
175 | ||
176 | static int link_enter_set_routes(Link *link) { | |
177 | Route *route; | |
178 | int r; | |
179 | ||
180 | assert(link); | |
181 | assert(link->network); | |
182 | assert(link->rtnl_messages == 0); | |
183 | assert(link->state == LINK_STATE_ADDRESSES_SET); | |
184 | ||
185 | link->state = LINK_STATE_SET_ROUTES; | |
186 | ||
187 | if (!link->network->routes) | |
188 | return link_enter_routes_set(link); | |
189 | ||
190 | LIST_FOREACH(routes, route, link->network->routes) { | |
191 | r = route_configure(route, link, &route_handler); | |
192 | if (r < 0) | |
c166a070 TG |
193 | return link_enter_failed(link); |
194 | ||
195 | link->rtnl_messages ++; | |
f882c247 TG |
196 | } |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static int link_enter_addresses_set(Link *link) { | |
c166a070 | 202 | log_info("Addresses set for link '%s'", link->ifname); |
f882c247 TG |
203 | |
204 | link->state = LINK_STATE_ADDRESSES_SET; | |
205 | ||
206 | return link_enter_set_routes(link); | |
207 | } | |
208 | ||
209 | static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
210 | Link *link = userdata; | |
211 | int r; | |
212 | ||
213 | assert(link->rtnl_messages > 0); | |
214 | assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED); | |
215 | ||
216 | link->rtnl_messages --; | |
217 | ||
218 | if (link->state == LINK_STATE_FAILED) | |
219 | return 1; | |
220 | ||
221 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
222 | if (r < 0 && r != -EEXIST) |
223 | log_warning("Could not set address on interface '%s': %s", | |
224 | link->ifname, strerror(-r)); | |
f882c247 TG |
225 | |
226 | if (link->rtnl_messages == 0) | |
227 | link_enter_addresses_set(link); | |
228 | ||
229 | return 1; | |
230 | } | |
231 | ||
232 | static int link_enter_set_addresses(Link *link) { | |
233 | Address *address; | |
234 | int r; | |
235 | ||
236 | assert(link); | |
237 | assert(link->network); | |
238 | assert(link->rtnl_messages == 0); | |
239 | ||
240 | if (!link->network->addresses) | |
241 | return link_enter_addresses_set(link); | |
242 | ||
243 | link->state = LINK_STATE_SET_ADDRESSES; | |
244 | ||
245 | LIST_FOREACH(addresses, address, link->network->addresses) { | |
246 | r = address_configure(address, link, &address_handler); | |
247 | if (r < 0) | |
c166a070 TG |
248 | return link_enter_failed(link); |
249 | ||
250 | link->rtnl_messages ++; | |
f882c247 TG |
251 | } |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
257 | Link *link = userdata; | |
258 | int r; | |
259 | ||
260 | r = sd_rtnl_message_get_errno(m); | |
c166a070 TG |
261 | if (r < 0) |
262 | log_warning("Could not bring up interface '%s': %s", | |
263 | link->ifname, strerror(-r)); | |
f882c247 TG |
264 | |
265 | link->flags |= IFF_UP; | |
266 | ||
c166a070 | 267 | log_info("Link '%s' is up", link->ifname); |
f882c247 TG |
268 | |
269 | if (link->state == LINK_STATE_ROUTES_SET) | |
270 | return link_enter_configured(link); | |
271 | ||
272 | return 1; | |
273 | } | |
274 | ||
275 | static int link_up(Link *link) { | |
f579559b TG |
276 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
277 | int r; | |
278 | ||
f882c247 TG |
279 | assert(link); |
280 | assert(link->manager); | |
281 | assert(link->manager->rtnl); | |
282 | ||
f579559b TG |
283 | r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req); |
284 | if (r < 0) { | |
285 | log_error("Could not allocate RTM_NEWLINK message"); | |
286 | return r; | |
287 | } | |
288 | ||
f882c247 | 289 | r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL); |
f579559b | 290 | if (r < 0) { |
f882c247 | 291 | log_error("Could not send rtnetlink message: %s", strerror(-r)); |
f579559b TG |
292 | return r; |
293 | } | |
294 | ||
f882c247 TG |
295 | return 0; |
296 | } | |
297 | ||
02b59d57 | 298 | static int link_enter_bridge_joined(Link *link) { |
f882c247 TG |
299 | int r; |
300 | ||
301 | r = link_up(link); | |
302 | if (r < 0) | |
303 | return link_enter_failed(link); | |
304 | ||
02b59d57 TG |
305 | link->state = LINK_STATE_BRIDGE_JOINED; |
306 | ||
307 | return link_enter_set_addresses(link); | |
308 | } | |
309 | ||
310 | static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
311 | Link *link = userdata; | |
312 | int r; | |
313 | ||
314 | assert(link->state == LINK_STATE_JOIN_BRIDGE || link->state == LINK_STATE_FAILED); | |
315 | ||
316 | if (link->state == LINK_STATE_FAILED) | |
317 | return 1; | |
318 | ||
319 | r = sd_rtnl_message_get_errno(m); | |
320 | if (r < 0) | |
321 | log_warning("Could not join interface '%s' to bridge: %s", | |
322 | link->ifname, strerror(-r)); | |
323 | ||
324 | link_enter_bridge_joined(link); | |
325 | ||
326 | return 1; | |
327 | } | |
328 | ||
329 | static int link_enter_join_bridge(Link *link) { | |
330 | int r; | |
331 | ||
332 | assert(link); | |
333 | assert(link->network); | |
334 | ||
335 | if (!link->network->bridge) | |
336 | return link_enter_bridge_joined(link); | |
337 | ||
338 | link->state = LINK_STATE_JOIN_BRIDGE; | |
339 | ||
340 | r = bridge_join(link->network->bridge, link, &bridge_handler); | |
341 | if (r < 0) | |
342 | return link_enter_failed(link); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | int link_configure(Link *link) { | |
348 | int r; | |
349 | ||
350 | r = link_enter_join_bridge(link); | |
f882c247 TG |
351 | if (r < 0) |
352 | return link_enter_failed(link); | |
f579559b TG |
353 | |
354 | return 0; | |
355 | } |