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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 "networkd.h" | |
23 | #include "net-util.h" | |
24 | #include "path-util.h" | |
25 | #include "conf-files.h" | |
26 | #include "conf-parser.h" | |
27 | #include "list.h" | |
28 | ||
29 | void bridge_free(Bridge *bridge) { | |
30 | bridge_join_callback *callback; | |
31 | ||
32 | if (!bridge) | |
33 | return; | |
34 | ||
35 | while ((callback = bridge->callbacks)) { | |
36 | LIST_REMOVE(callbacks, bridge->callbacks, callback); | |
37 | free(callback); | |
38 | } | |
39 | ||
40 | if (bridge->name) | |
41 | hashmap_remove(bridge->manager->bridges, bridge->name); | |
42 | ||
43 | free(bridge->filename); | |
44 | ||
45 | free(bridge->description); | |
46 | free(bridge->name); | |
47 | ||
48 | free(bridge); | |
49 | } | |
50 | ||
51 | int bridge_get(Manager *manager, const char *name, Bridge **ret) { | |
52 | Bridge *bridge; | |
53 | ||
54 | assert(manager); | |
55 | assert(name); | |
56 | assert(ret); | |
57 | ||
58 | if (manager_should_reload(manager)) | |
59 | manager_load_config(manager); | |
60 | ||
61 | bridge = hashmap_get(manager->bridges, name); | |
62 | if (!bridge) { | |
63 | *ret = NULL; | |
64 | return -ENOENT; | |
65 | } | |
66 | ||
67 | *ret = bridge; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | static int bridge_enter_failed(Bridge *bridge) { | |
73 | bridge->state = BRIDGE_STATE_FAILED; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | static int bridge_join_ready(Bridge *bridge, Link* link, sd_rtnl_message_handler_t callback) { | |
79 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
80 | int r; | |
81 | ||
82 | assert(bridge); | |
83 | assert(bridge->state == BRIDGE_STATE_READY); | |
84 | assert(link); | |
85 | assert(callback); | |
86 | ||
fc25d7f8 | 87 | r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req); |
02b59d57 | 88 | if (r < 0) { |
3333d748 ZJS |
89 | log_error_bridge(bridge, |
90 | "Could not allocate RTM_SETLINK message: %s", | |
91 | strerror(-r)); | |
02b59d57 TG |
92 | return r; |
93 | } | |
94 | ||
0a0dc69b | 95 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, bridge->link->ifindex); |
02b59d57 | 96 | if (r < 0) { |
3333d748 ZJS |
97 | log_error_bridge(bridge, |
98 | "Could not append IFLA_MASTER attribute: %s", | |
99 | strerror(-r)); | |
02b59d57 TG |
100 | return r; |
101 | } | |
102 | ||
103 | r = sd_rtnl_call_async(bridge->manager->rtnl, req, callback, link, 0, NULL); | |
104 | if (r < 0) { | |
3333d748 ZJS |
105 | log_error_bridge(bridge, |
106 | "Could not send rtnetlink message: %s", | |
107 | strerror(-r)); | |
02b59d57 TG |
108 | return r; |
109 | } | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static int bridge_enter_ready(Bridge *bridge) { | |
115 | bridge_join_callback *callback; | |
116 | ||
117 | bridge->state = BRIDGE_STATE_READY; | |
118 | ||
39032b87 | 119 | log_info_bridge(bridge, "bridge ready"); |
02b59d57 TG |
120 | |
121 | LIST_FOREACH(callbacks, callback, bridge->callbacks) { | |
122 | /* join the links that were attempted to be joined befor the | |
123 | * link was ready */ | |
124 | bridge_join_ready(bridge, callback->link, callback->callback); | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int bridge_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { | |
131 | Bridge *bridge = userdata; | |
132 | int r; | |
133 | ||
134 | assert(bridge->state == BRIDGE_STATE_CREATING); | |
135 | ||
136 | r = sd_rtnl_message_get_errno(m); | |
137 | if (r < 0) { | |
3333d748 | 138 | log_warning_bridge(bridge, "bridge failed: %s", strerror(-r)); |
dd3efc09 TG |
139 | bridge_enter_failed(bridge); |
140 | ||
141 | return 1; | |
02b59d57 TG |
142 | } |
143 | ||
144 | if (bridge->link) | |
dd3efc09 | 145 | bridge_enter_ready(bridge); |
d638dee0 TG |
146 | else |
147 | bridge->state = BRIDGE_STATE_CREATED; | |
02b59d57 | 148 | |
dd3efc09 | 149 | return 1; |
02b59d57 TG |
150 | } |
151 | ||
152 | static int bridge_create(Bridge *bridge) { | |
153 | _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL; | |
154 | int r; | |
155 | ||
156 | assert(bridge); | |
157 | assert(bridge->state == _BRIDGE_STATE_INVALID); | |
158 | assert(bridge->name); | |
159 | assert(bridge->manager); | |
160 | assert(bridge->manager->rtnl); | |
161 | ||
fc25d7f8 | 162 | r = sd_rtnl_message_link_new(RTM_NEWLINK, 0, &req); |
02b59d57 | 163 | if (r < 0) { |
3333d748 ZJS |
164 | log_error_bridge(bridge, |
165 | "Could not allocate RTM_NEWLINK message: %s", | |
166 | strerror(-r)); | |
02b59d57 TG |
167 | return r; |
168 | } | |
169 | ||
0a0dc69b | 170 | r = sd_rtnl_message_append_string(req, IFLA_IFNAME, bridge->name); |
02b59d57 | 171 | if (r < 0) { |
3333d748 ZJS |
172 | log_error_bridge(bridge, |
173 | "Could not append IFLA_IFNAME attribute: %s", | |
174 | strerror(-r)); | |
02b59d57 TG |
175 | return r; |
176 | } | |
177 | ||
178 | r = sd_rtnl_message_open_container(req, IFLA_LINKINFO); | |
179 | if (r < 0) { | |
3333d748 ZJS |
180 | log_error_bridge(bridge, |
181 | "Could not open IFLA_LINKINFO container: %s", | |
182 | strerror(-r)); | |
02b59d57 TG |
183 | return r; |
184 | } | |
185 | ||
0a0dc69b | 186 | r = sd_rtnl_message_append_string(req, IFLA_INFO_KIND, "bridge"); |
02b59d57 | 187 | if (r < 0) { |
3333d748 ZJS |
188 | log_error_bridge(bridge, |
189 | "Could not append IFLA_INFO_KIND attribute: %s", | |
190 | strerror(-r)); | |
02b59d57 TG |
191 | return r; |
192 | } | |
193 | ||
194 | r = sd_rtnl_message_close_container(req); | |
195 | if (r < 0) { | |
3333d748 ZJS |
196 | log_error_bridge(bridge, |
197 | "Could not close IFLA_LINKINFO container %s", | |
198 | strerror(-r)); | |
02b59d57 TG |
199 | return r; |
200 | } | |
201 | ||
202 | r = sd_rtnl_call_async(bridge->manager->rtnl, req, &bridge_create_handler, bridge, 0, NULL); | |
203 | if (r < 0) { | |
3333d748 ZJS |
204 | log_error_bridge(bridge, |
205 | "Could not send rtnetlink message: %s", strerror(-r)); | |
02b59d57 TG |
206 | return r; |
207 | } | |
208 | ||
39032b87 | 209 | log_debug_bridge(bridge, "creating bridge"); |
02b59d57 TG |
210 | |
211 | bridge->state = BRIDGE_STATE_CREATING; | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t callback) { | |
02b59d57 TG |
217 | if (bridge->state == BRIDGE_STATE_READY) { |
218 | bridge_join_ready(bridge, link, callback); | |
219 | } else { | |
220 | /* the bridge is not yet read, save this request for when it is*/ | |
221 | bridge_join_callback *cb; | |
222 | ||
223 | cb = new0(bridge_join_callback, 1); | |
224 | if (!cb) | |
225 | return log_oom(); | |
226 | ||
227 | cb->callback = callback; | |
228 | cb->link = link; | |
229 | ||
230 | LIST_PREPEND(callbacks, bridge->callbacks, cb); | |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | int bridge_set_link(Manager *m, Link *link) { | |
237 | Bridge *bridge; | |
238 | ||
239 | bridge = hashmap_get(m->bridges, link->ifname); | |
240 | if (!bridge) | |
241 | return -ENOENT; | |
242 | ||
243 | if (bridge->link && bridge->link != link) | |
244 | return -EEXIST; | |
245 | ||
246 | bridge->link = link; | |
247 | ||
248 | if (bridge->state == BRIDGE_STATE_CREATED) | |
249 | bridge_enter_ready(bridge); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static int bridge_load_one(Manager *manager, const char *filename) { | |
255 | _cleanup_bridge_free_ Bridge *bridge = NULL; | |
256 | _cleanup_fclose_ FILE *file = NULL; | |
257 | int r; | |
258 | ||
bf1bc670 TA |
259 | assert(manager); |
260 | assert(filename); | |
261 | ||
02b59d57 TG |
262 | file = fopen(filename, "re"); |
263 | if (!file) { | |
264 | if (errno == ENOENT) | |
265 | return 0; | |
266 | else | |
267 | return errno; | |
268 | } | |
269 | ||
270 | bridge = new0(Bridge, 1); | |
271 | if (!bridge) | |
272 | return log_oom(); | |
273 | ||
274 | bridge->manager = manager; | |
275 | bridge->state = _BRIDGE_STATE_INVALID; | |
276 | ||
277 | r = config_parse(NULL, filename, file, "Bridge\0", config_item_perf_lookup, | |
278 | (void*) network_gperf_lookup, false, false, bridge); | |
279 | if (r < 0) { | |
280 | log_warning("Could not parse config file %s: %s", filename, strerror(-r)); | |
281 | return r; | |
449f7554 | 282 | } |
02b59d57 TG |
283 | |
284 | if (!bridge->name) { | |
285 | log_warning("Bridge without Name configured in %s. Ignoring", filename); | |
286 | return 0; | |
287 | } | |
288 | ||
289 | bridge->filename = strdup(filename); | |
290 | if (!bridge->filename) | |
291 | return log_oom(); | |
292 | ||
293 | r = hashmap_put(bridge->manager->bridges, bridge->name, bridge); | |
294 | if (r < 0) | |
295 | return r; | |
296 | ||
297 | LIST_HEAD_INIT(bridge->callbacks); | |
298 | ||
299 | r = bridge_create(bridge); | |
300 | if (r < 0) | |
301 | return r; | |
302 | ||
303 | bridge = NULL; | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | int bridge_load(Manager *manager) { | |
309 | Bridge *bridge; | |
310 | char **files, **f; | |
311 | int r; | |
312 | ||
313 | assert(manager); | |
314 | ||
315 | while ((bridge = hashmap_first(manager->bridges))) | |
316 | bridge_free(bridge); | |
317 | ||
2ad8416d | 318 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 TG |
319 | if (r < 0) { |
320 | log_error("Failed to enumerate netdev files: %s", strerror(-r)); | |
321 | return r; | |
322 | } | |
323 | ||
324 | STRV_FOREACH_BACKWARDS(f, files) { | |
325 | r = bridge_load_one(manager, *f); | |
326 | if (r < 0) | |
327 | return r; | |
328 | } | |
329 | ||
330 | strv_free(files); | |
331 | ||
332 | return 0; | |
333 | } |