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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 | ||
672682a6 TG |
29 | #define VLANID_MAX 4094 |
30 | ||
52433f6b TG |
31 | static const char* const netdev_kind_table[] = { |
32 | [NETDEV_KIND_BRIDGE] = "bridge", | |
54abf461 TG |
33 | [NETDEV_KIND_BOND] = "bond", |
34 | [NETDEV_KIND_VLAN] = "vlan", | |
52433f6b | 35 | }; |
02b59d57 | 36 | |
1a436809 TG |
37 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
38 | DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind"); | |
52433f6b | 39 | |
1a436809 | 40 | void netdev_free(NetDev *netdev) { |
52433f6b TG |
41 | netdev_enslave_callback *callback; |
42 | ||
43 | if (!netdev) | |
02b59d57 TG |
44 | return; |
45 | ||
52433f6b TG |
46 | while ((callback = netdev->callbacks)) { |
47 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
02b59d57 TG |
48 | free(callback); |
49 | } | |
50 | ||
52433f6b TG |
51 | if (netdev->name) |
52 | hashmap_remove(netdev->manager->netdevs, netdev->name); | |
02b59d57 | 53 | |
52433f6b | 54 | free(netdev->filename); |
02b59d57 | 55 | |
52433f6b TG |
56 | free(netdev->description); |
57 | free(netdev->name); | |
02b59d57 | 58 | |
52433f6b | 59 | free(netdev); |
02b59d57 TG |
60 | } |
61 | ||
1a436809 TG |
62 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
63 | NetDev *netdev; | |
02b59d57 TG |
64 | |
65 | assert(manager); | |
66 | assert(name); | |
67 | assert(ret); | |
68 | ||
52433f6b TG |
69 | netdev = hashmap_get(manager->netdevs, name); |
70 | if (!netdev) { | |
02b59d57 TG |
71 | *ret = NULL; |
72 | return -ENOENT; | |
73 | } | |
74 | ||
52433f6b | 75 | *ret = netdev; |
02b59d57 TG |
76 | |
77 | return 0; | |
78 | } | |
79 | ||
1a436809 | 80 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 81 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 TG |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
1a436809 | 86 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 87 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
02b59d57 TG |
88 | int r; |
89 | ||
52433f6b TG |
90 | assert(netdev); |
91 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
92 | assert(netdev->manager); |
93 | assert(netdev->manager->rtnl); | |
02b59d57 TG |
94 | assert(link); |
95 | assert(callback); | |
96 | ||
151b9b96 LP |
97 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, |
98 | RTM_SETLINK, link->ifindex); | |
02b59d57 | 99 | if (r < 0) { |
52433f6b | 100 | log_error_netdev(netdev, |
3333d748 ZJS |
101 | "Could not allocate RTM_SETLINK message: %s", |
102 | strerror(-r)); | |
02b59d57 TG |
103 | return r; |
104 | } | |
105 | ||
50add290 | 106 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
02b59d57 | 107 | if (r < 0) { |
52433f6b | 108 | log_error_netdev(netdev, |
3333d748 ZJS |
109 | "Could not append IFLA_MASTER attribute: %s", |
110 | strerror(-r)); | |
02b59d57 TG |
111 | return r; |
112 | } | |
113 | ||
52433f6b | 114 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
02b59d57 | 115 | if (r < 0) { |
52433f6b | 116 | log_error_netdev(netdev, |
3333d748 ZJS |
117 | "Could not send rtnetlink message: %s", |
118 | strerror(-r)); | |
02b59d57 TG |
119 | return r; |
120 | } | |
121 | ||
52433f6b | 122 | log_debug_netdev(netdev, "enslaving link '%s'", link->ifname); |
ab47d620 | 123 | |
02b59d57 TG |
124 | return 0; |
125 | } | |
126 | ||
1a436809 | 127 | static int netdev_enter_ready(NetDev *netdev) { |
52433f6b | 128 | netdev_enslave_callback *callback; |
02b59d57 | 129 | |
52433f6b TG |
130 | assert(netdev); |
131 | assert(netdev->name); | |
924fe430 | 132 | |
52433f6b | 133 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 134 | |
52433f6b | 135 | log_info_netdev(netdev, "netdev ready"); |
02b59d57 | 136 | |
52433f6b TG |
137 | LIST_FOREACH(callbacks, callback, netdev->callbacks) { |
138 | /* enslave the links that were attempted to be enslaved befor the | |
02b59d57 | 139 | * link was ready */ |
52433f6b | 140 | netdev_enslave_ready(netdev, callback->link, callback->callback); |
02b59d57 TG |
141 | } |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
52433f6b | 146 | static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
1a436809 | 147 | NetDev *netdev = userdata; |
172f6635 | 148 | int r; |
02b59d57 | 149 | |
52433f6b | 150 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 TG |
151 | |
152 | r = sd_rtnl_message_get_errno(m); | |
153 | if (r < 0) { | |
52433f6b TG |
154 | log_warning_netdev(netdev, "netdev failed: %s", strerror(-r)); |
155 | netdev_enter_failed(netdev); | |
dd3efc09 TG |
156 | |
157 | return 1; | |
02b59d57 TG |
158 | } |
159 | ||
dd3efc09 | 160 | return 1; |
02b59d57 TG |
161 | } |
162 | ||
1a436809 | 163 | static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 164 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
52433f6b | 165 | const char *kind; |
02b59d57 TG |
166 | int r; |
167 | ||
52433f6b | 168 | assert(netdev); |
4fb7242c TG |
169 | assert(!(netdev->kind == NETDEV_KIND_VLAN) || |
170 | (link && callback && netdev->vlanid <= VLANID_MAX)); | |
52433f6b TG |
171 | assert(netdev->name); |
172 | assert(netdev->manager); | |
173 | assert(netdev->manager->rtnl); | |
02b59d57 | 174 | |
151b9b96 | 175 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, 0); |
02b59d57 | 176 | if (r < 0) { |
52433f6b | 177 | log_error_netdev(netdev, |
3333d748 ZJS |
178 | "Could not allocate RTM_NEWLINK message: %s", |
179 | strerror(-r)); | |
02b59d57 TG |
180 | return r; |
181 | } | |
182 | ||
54abf461 TG |
183 | if (link) { |
184 | r = sd_rtnl_message_append_u32(req, IFLA_LINK, link->ifindex); | |
185 | if (r < 0) { | |
186 | log_error_netdev(netdev, | |
187 | "Could not append IFLA_LINK attribute: %s", | |
188 | strerror(-r)); | |
189 | return r; | |
190 | } | |
191 | } | |
192 | ||
52433f6b | 193 | r = sd_rtnl_message_append_string(req, IFLA_IFNAME, netdev->name); |
02b59d57 | 194 | if (r < 0) { |
52433f6b | 195 | log_error_netdev(netdev, |
3333d748 ZJS |
196 | "Could not append IFLA_IFNAME attribute: %s", |
197 | strerror(-r)); | |
02b59d57 TG |
198 | return r; |
199 | } | |
200 | ||
ee3a6a51 | 201 | r = sd_rtnl_message_open_container(req, IFLA_LINKINFO); |
02b59d57 | 202 | if (r < 0) { |
52433f6b | 203 | log_error_netdev(netdev, |
3333d748 ZJS |
204 | "Could not open IFLA_LINKINFO container: %s", |
205 | strerror(-r)); | |
02b59d57 TG |
206 | return r; |
207 | } | |
208 | ||
52433f6b TG |
209 | kind = netdev_kind_to_string(netdev->kind); |
210 | if (!kind) { | |
211 | log_error_netdev(netdev, "Invalid kind"); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | r = sd_rtnl_message_append_string(req, IFLA_INFO_KIND, kind); | |
02b59d57 | 216 | if (r < 0) { |
52433f6b | 217 | log_error_netdev(netdev, |
3333d748 ZJS |
218 | "Could not append IFLA_INFO_KIND attribute: %s", |
219 | strerror(-r)); | |
02b59d57 TG |
220 | return r; |
221 | } | |
222 | ||
672682a6 | 223 | if (netdev->vlanid <= VLANID_MAX) { |
ee3a6a51 | 224 | r = sd_rtnl_message_open_container(req, IFLA_INFO_DATA); |
54abf461 TG |
225 | if (r < 0) { |
226 | log_error_netdev(netdev, | |
227 | "Could not open IFLA_INFO_DATA container: %s", | |
228 | strerror(-r)); | |
229 | return r; | |
230 | } | |
231 | ||
232 | r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid); | |
233 | if (r < 0) { | |
234 | log_error_netdev(netdev, | |
235 | "Could not append IFLA_VLAN_ID attribute: %s", | |
236 | strerror(-r)); | |
237 | return r; | |
238 | } | |
239 | ||
240 | r = sd_rtnl_message_close_container(req); | |
241 | if (r < 0) { | |
242 | log_error_netdev(netdev, | |
243 | "Could not close IFLA_INFO_DATA container %s", | |
244 | strerror(-r)); | |
245 | return r; | |
246 | } | |
247 | } | |
248 | ||
02b59d57 TG |
249 | r = sd_rtnl_message_close_container(req); |
250 | if (r < 0) { | |
52433f6b | 251 | log_error_netdev(netdev, |
3333d748 ZJS |
252 | "Could not close IFLA_LINKINFO container %s", |
253 | strerror(-r)); | |
02b59d57 TG |
254 | return r; |
255 | } | |
256 | ||
54abf461 TG |
257 | if (link) |
258 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); | |
259 | else | |
260 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, &netdev_create_handler, netdev, 0, NULL); | |
02b59d57 | 261 | if (r < 0) { |
52433f6b | 262 | log_error_netdev(netdev, |
3333d748 | 263 | "Could not send rtnetlink message: %s", strerror(-r)); |
02b59d57 TG |
264 | return r; |
265 | } | |
266 | ||
52433f6b | 267 | log_debug_netdev(netdev, "creating netdev"); |
02b59d57 | 268 | |
52433f6b | 269 | netdev->state = NETDEV_STATE_CREATING; |
02b59d57 TG |
270 | |
271 | return 0; | |
272 | } | |
273 | ||
1a436809 | 274 | int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
54abf461 TG |
275 | if (netdev->kind == NETDEV_KIND_VLAN) |
276 | return netdev_create(netdev, link, callback); | |
277 | ||
52433f6b TG |
278 | if (netdev->state == NETDEV_STATE_READY) { |
279 | netdev_enslave_ready(netdev, link, callback); | |
02b59d57 | 280 | } else { |
52433f6b TG |
281 | /* the netdev is not yet read, save this request for when it is*/ |
282 | netdev_enslave_callback *cb; | |
02b59d57 | 283 | |
52433f6b | 284 | cb = new0(netdev_enslave_callback, 1); |
02b59d57 TG |
285 | if (!cb) |
286 | return log_oom(); | |
287 | ||
288 | cb->callback = callback; | |
289 | cb->link = link; | |
290 | ||
52433f6b | 291 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
02b59d57 TG |
292 | } |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
1a436809 | 297 | int netdev_set_ifindex(NetDev *netdev, int ifindex) { |
50add290 TG |
298 | assert(netdev); |
299 | assert(ifindex > 0); | |
02b59d57 | 300 | |
50add290 TG |
301 | if (netdev->ifindex > 0) { |
302 | if (netdev->ifindex == ifindex) | |
303 | return 0; | |
304 | else | |
305 | return -EEXIST; | |
306 | } | |
02b59d57 | 307 | |
50add290 | 308 | netdev->ifindex = ifindex; |
52433f6b TG |
309 | |
310 | netdev_enter_ready(netdev); | |
02b59d57 TG |
311 | |
312 | return 0; | |
313 | } | |
314 | ||
52433f6b | 315 | static int netdev_load_one(Manager *manager, const char *filename) { |
1a436809 | 316 | _cleanup_netdev_free_ NetDev *netdev = NULL; |
02b59d57 TG |
317 | _cleanup_fclose_ FILE *file = NULL; |
318 | int r; | |
319 | ||
bf1bc670 TA |
320 | assert(manager); |
321 | assert(filename); | |
322 | ||
02b59d57 TG |
323 | file = fopen(filename, "re"); |
324 | if (!file) { | |
325 | if (errno == ENOENT) | |
326 | return 0; | |
327 | else | |
328 | return errno; | |
329 | } | |
330 | ||
1a436809 | 331 | netdev = new0(NetDev, 1); |
52433f6b | 332 | if (!netdev) |
02b59d57 TG |
333 | return log_oom(); |
334 | ||
52433f6b TG |
335 | netdev->manager = manager; |
336 | netdev->state = _NETDEV_STATE_INVALID; | |
337 | netdev->kind = _NETDEV_KIND_INVALID; | |
672682a6 | 338 | netdev->vlanid = VLANID_MAX + 1; |
02b59d57 | 339 | |
c0dda186 TG |
340 | r = config_parse(NULL, filename, file, "Match\0NetDev\0VLAN\0", config_item_perf_lookup, |
341 | (void*) network_netdev_gperf_lookup, false, false, netdev); | |
02b59d57 TG |
342 | if (r < 0) { |
343 | log_warning("Could not parse config file %s: %s", filename, strerror(-r)); | |
344 | return r; | |
449f7554 | 345 | } |
02b59d57 | 346 | |
52433f6b | 347 | if (netdev->kind == _NETDEV_KIND_INVALID) { |
1a436809 | 348 | log_warning("NetDev without Kind configured in %s. Ignoring", filename); |
52433f6b TG |
349 | return 0; |
350 | } | |
351 | ||
352 | if (!netdev->name) { | |
1a436809 | 353 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
02b59d57 TG |
354 | return 0; |
355 | } | |
356 | ||
672682a6 TG |
357 | if (netdev->kind == NETDEV_KIND_VLAN && netdev->vlanid > VLANID_MAX) { |
358 | log_warning("VLAN without valid Id configured in %s. Ignoring", filename); | |
54abf461 TG |
359 | return 0; |
360 | } | |
361 | ||
52433f6b TG |
362 | netdev->filename = strdup(filename); |
363 | if (!netdev->filename) | |
02b59d57 TG |
364 | return log_oom(); |
365 | ||
c0dda186 | 366 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, |
edbb03e9 TG |
367 | netdev->match_host, netdev->match_virt, |
368 | netdev->match_kernel, netdev->match_arch, | |
bf175aaf | 369 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
c0dda186 TG |
370 | return 0; |
371 | ||
52433f6b | 372 | r = hashmap_put(netdev->manager->netdevs, netdev->name, netdev); |
02b59d57 TG |
373 | if (r < 0) |
374 | return r; | |
375 | ||
52433f6b | 376 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 377 | |
54abf461 TG |
378 | if (netdev->kind != NETDEV_KIND_VLAN) { |
379 | r = netdev_create(netdev, NULL, NULL); | |
380 | if (r < 0) | |
381 | return r; | |
382 | } | |
02b59d57 | 383 | |
52433f6b | 384 | netdev = NULL; |
02b59d57 TG |
385 | |
386 | return 0; | |
387 | } | |
388 | ||
52433f6b | 389 | int netdev_load(Manager *manager) { |
1a436809 | 390 | NetDev *netdev; |
02b59d57 TG |
391 | char **files, **f; |
392 | int r; | |
393 | ||
394 | assert(manager); | |
395 | ||
52433f6b TG |
396 | while ((netdev = hashmap_first(manager->netdevs))) |
397 | netdev_free(netdev); | |
02b59d57 | 398 | |
2ad8416d | 399 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 TG |
400 | if (r < 0) { |
401 | log_error("Failed to enumerate netdev files: %s", strerror(-r)); | |
402 | return r; | |
403 | } | |
404 | ||
405 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 406 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
407 | if (r < 0) |
408 | return r; | |
409 | } | |
410 | ||
411 | strv_free(files); | |
412 | ||
413 | return 0; | |
414 | } |