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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); | |
02b59d57 TG |
92 | assert(link); |
93 | assert(callback); | |
94 | ||
d595c5cc | 95 | r = sd_rtnl_message_new_link(RTM_SETLINK, link->ifindex, &req); |
02b59d57 | 96 | if (r < 0) { |
52433f6b | 97 | log_error_netdev(netdev, |
3333d748 ZJS |
98 | "Could not allocate RTM_SETLINK message: %s", |
99 | strerror(-r)); | |
02b59d57 TG |
100 | return r; |
101 | } | |
102 | ||
50add290 | 103 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
02b59d57 | 104 | if (r < 0) { |
52433f6b | 105 | log_error_netdev(netdev, |
3333d748 ZJS |
106 | "Could not append IFLA_MASTER attribute: %s", |
107 | strerror(-r)); | |
02b59d57 TG |
108 | return r; |
109 | } | |
110 | ||
52433f6b | 111 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
02b59d57 | 112 | if (r < 0) { |
52433f6b | 113 | log_error_netdev(netdev, |
3333d748 ZJS |
114 | "Could not send rtnetlink message: %s", |
115 | strerror(-r)); | |
02b59d57 TG |
116 | return r; |
117 | } | |
118 | ||
52433f6b | 119 | log_debug_netdev(netdev, "enslaving link '%s'", link->ifname); |
ab47d620 | 120 | |
02b59d57 TG |
121 | return 0; |
122 | } | |
123 | ||
1a436809 | 124 | static int netdev_enter_ready(NetDev *netdev) { |
52433f6b | 125 | netdev_enslave_callback *callback; |
02b59d57 | 126 | |
52433f6b TG |
127 | assert(netdev); |
128 | assert(netdev->name); | |
924fe430 | 129 | |
52433f6b | 130 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 131 | |
52433f6b | 132 | log_info_netdev(netdev, "netdev ready"); |
02b59d57 | 133 | |
52433f6b TG |
134 | LIST_FOREACH(callbacks, callback, netdev->callbacks) { |
135 | /* enslave the links that were attempted to be enslaved befor the | |
02b59d57 | 136 | * link was ready */ |
52433f6b | 137 | netdev_enslave_ready(netdev, callback->link, callback->callback); |
02b59d57 TG |
138 | } |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
52433f6b | 143 | static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
1a436809 | 144 | NetDev *netdev = userdata; |
172f6635 | 145 | int r; |
02b59d57 | 146 | |
52433f6b | 147 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 TG |
148 | |
149 | r = sd_rtnl_message_get_errno(m); | |
150 | if (r < 0) { | |
52433f6b TG |
151 | log_warning_netdev(netdev, "netdev failed: %s", strerror(-r)); |
152 | netdev_enter_failed(netdev); | |
dd3efc09 TG |
153 | |
154 | return 1; | |
02b59d57 TG |
155 | } |
156 | ||
dd3efc09 | 157 | return 1; |
02b59d57 TG |
158 | } |
159 | ||
1a436809 | 160 | static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 161 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
52433f6b | 162 | const char *kind; |
02b59d57 TG |
163 | int r; |
164 | ||
52433f6b | 165 | assert(netdev); |
672682a6 | 166 | assert(!(netdev->kind == NETDEV_KIND_VLAN) || (link && callback && netdev->vlanid <= VLANID_MAX)); |
52433f6b TG |
167 | assert(netdev->name); |
168 | assert(netdev->manager); | |
169 | assert(netdev->manager->rtnl); | |
02b59d57 | 170 | |
d595c5cc | 171 | r = sd_rtnl_message_new_link(RTM_NEWLINK, 0, &req); |
02b59d57 | 172 | if (r < 0) { |
52433f6b | 173 | log_error_netdev(netdev, |
3333d748 ZJS |
174 | "Could not allocate RTM_NEWLINK message: %s", |
175 | strerror(-r)); | |
02b59d57 TG |
176 | return r; |
177 | } | |
178 | ||
54abf461 TG |
179 | if (link) { |
180 | r = sd_rtnl_message_append_u32(req, IFLA_LINK, link->ifindex); | |
181 | if (r < 0) { | |
182 | log_error_netdev(netdev, | |
183 | "Could not append IFLA_LINK attribute: %s", | |
184 | strerror(-r)); | |
185 | return r; | |
186 | } | |
187 | } | |
188 | ||
52433f6b | 189 | r = sd_rtnl_message_append_string(req, IFLA_IFNAME, netdev->name); |
02b59d57 | 190 | if (r < 0) { |
52433f6b | 191 | log_error_netdev(netdev, |
3333d748 ZJS |
192 | "Could not append IFLA_IFNAME attribute: %s", |
193 | strerror(-r)); | |
02b59d57 TG |
194 | return r; |
195 | } | |
196 | ||
31a4e153 | 197 | r = sd_rtnl_message_open_container(req, IFLA_LINKINFO, 0); |
02b59d57 | 198 | if (r < 0) { |
52433f6b | 199 | log_error_netdev(netdev, |
3333d748 ZJS |
200 | "Could not open IFLA_LINKINFO container: %s", |
201 | strerror(-r)); | |
02b59d57 TG |
202 | return r; |
203 | } | |
204 | ||
52433f6b TG |
205 | kind = netdev_kind_to_string(netdev->kind); |
206 | if (!kind) { | |
207 | log_error_netdev(netdev, "Invalid kind"); | |
208 | return -EINVAL; | |
209 | } | |
210 | ||
211 | r = sd_rtnl_message_append_string(req, IFLA_INFO_KIND, kind); | |
02b59d57 | 212 | if (r < 0) { |
52433f6b | 213 | log_error_netdev(netdev, |
3333d748 ZJS |
214 | "Could not append IFLA_INFO_KIND attribute: %s", |
215 | strerror(-r)); | |
02b59d57 TG |
216 | return r; |
217 | } | |
218 | ||
672682a6 | 219 | if (netdev->vlanid <= VLANID_MAX) { |
31a4e153 | 220 | r = sd_rtnl_message_open_container(req, IFLA_INFO_DATA, 0); |
54abf461 TG |
221 | if (r < 0) { |
222 | log_error_netdev(netdev, | |
223 | "Could not open IFLA_INFO_DATA container: %s", | |
224 | strerror(-r)); | |
225 | return r; | |
226 | } | |
227 | ||
228 | r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid); | |
229 | if (r < 0) { | |
230 | log_error_netdev(netdev, | |
231 | "Could not append IFLA_VLAN_ID attribute: %s", | |
232 | strerror(-r)); | |
233 | return r; | |
234 | } | |
235 | ||
236 | r = sd_rtnl_message_close_container(req); | |
237 | if (r < 0) { | |
238 | log_error_netdev(netdev, | |
239 | "Could not close IFLA_INFO_DATA container %s", | |
240 | strerror(-r)); | |
241 | return r; | |
242 | } | |
243 | } | |
244 | ||
02b59d57 TG |
245 | r = sd_rtnl_message_close_container(req); |
246 | if (r < 0) { | |
52433f6b | 247 | log_error_netdev(netdev, |
3333d748 ZJS |
248 | "Could not close IFLA_LINKINFO container %s", |
249 | strerror(-r)); | |
02b59d57 TG |
250 | return r; |
251 | } | |
252 | ||
54abf461 TG |
253 | if (link) |
254 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); | |
255 | else | |
256 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, &netdev_create_handler, netdev, 0, NULL); | |
02b59d57 | 257 | if (r < 0) { |
52433f6b | 258 | log_error_netdev(netdev, |
3333d748 | 259 | "Could not send rtnetlink message: %s", strerror(-r)); |
02b59d57 TG |
260 | return r; |
261 | } | |
262 | ||
52433f6b | 263 | log_debug_netdev(netdev, "creating netdev"); |
02b59d57 | 264 | |
52433f6b | 265 | netdev->state = NETDEV_STATE_CREATING; |
02b59d57 TG |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
1a436809 | 270 | int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
54abf461 TG |
271 | if (netdev->kind == NETDEV_KIND_VLAN) |
272 | return netdev_create(netdev, link, callback); | |
273 | ||
52433f6b TG |
274 | if (netdev->state == NETDEV_STATE_READY) { |
275 | netdev_enslave_ready(netdev, link, callback); | |
02b59d57 | 276 | } else { |
52433f6b TG |
277 | /* the netdev is not yet read, save this request for when it is*/ |
278 | netdev_enslave_callback *cb; | |
02b59d57 | 279 | |
52433f6b | 280 | cb = new0(netdev_enslave_callback, 1); |
02b59d57 TG |
281 | if (!cb) |
282 | return log_oom(); | |
283 | ||
284 | cb->callback = callback; | |
285 | cb->link = link; | |
286 | ||
52433f6b | 287 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
02b59d57 TG |
288 | } |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
1a436809 | 293 | int netdev_set_ifindex(NetDev *netdev, int ifindex) { |
50add290 TG |
294 | assert(netdev); |
295 | assert(ifindex > 0); | |
02b59d57 | 296 | |
50add290 TG |
297 | if (netdev->ifindex > 0) { |
298 | if (netdev->ifindex == ifindex) | |
299 | return 0; | |
300 | else | |
301 | return -EEXIST; | |
302 | } | |
02b59d57 | 303 | |
50add290 | 304 | netdev->ifindex = ifindex; |
52433f6b TG |
305 | |
306 | netdev_enter_ready(netdev); | |
02b59d57 TG |
307 | |
308 | return 0; | |
309 | } | |
310 | ||
52433f6b | 311 | static int netdev_load_one(Manager *manager, const char *filename) { |
1a436809 | 312 | _cleanup_netdev_free_ NetDev *netdev = NULL; |
02b59d57 TG |
313 | _cleanup_fclose_ FILE *file = NULL; |
314 | int r; | |
315 | ||
bf1bc670 TA |
316 | assert(manager); |
317 | assert(filename); | |
318 | ||
02b59d57 TG |
319 | file = fopen(filename, "re"); |
320 | if (!file) { | |
321 | if (errno == ENOENT) | |
322 | return 0; | |
323 | else | |
324 | return errno; | |
325 | } | |
326 | ||
1a436809 | 327 | netdev = new0(NetDev, 1); |
52433f6b | 328 | if (!netdev) |
02b59d57 TG |
329 | return log_oom(); |
330 | ||
52433f6b TG |
331 | netdev->manager = manager; |
332 | netdev->state = _NETDEV_STATE_INVALID; | |
333 | netdev->kind = _NETDEV_KIND_INVALID; | |
672682a6 | 334 | netdev->vlanid = VLANID_MAX + 1; |
02b59d57 | 335 | |
1a436809 | 336 | r = config_parse(NULL, filename, file, "NetDev\0VLAN\0", config_item_perf_lookup, |
52433f6b | 337 | (void*) network_gperf_lookup, false, false, netdev); |
02b59d57 TG |
338 | if (r < 0) { |
339 | log_warning("Could not parse config file %s: %s", filename, strerror(-r)); | |
340 | return r; | |
449f7554 | 341 | } |
02b59d57 | 342 | |
52433f6b | 343 | if (netdev->kind == _NETDEV_KIND_INVALID) { |
1a436809 | 344 | log_warning("NetDev without Kind configured in %s. Ignoring", filename); |
52433f6b TG |
345 | return 0; |
346 | } | |
347 | ||
348 | if (!netdev->name) { | |
1a436809 | 349 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
02b59d57 TG |
350 | return 0; |
351 | } | |
352 | ||
672682a6 TG |
353 | if (netdev->kind == NETDEV_KIND_VLAN && netdev->vlanid > VLANID_MAX) { |
354 | log_warning("VLAN without valid Id configured in %s. Ignoring", filename); | |
54abf461 TG |
355 | return 0; |
356 | } | |
357 | ||
52433f6b TG |
358 | netdev->filename = strdup(filename); |
359 | if (!netdev->filename) | |
02b59d57 TG |
360 | return log_oom(); |
361 | ||
52433f6b | 362 | r = hashmap_put(netdev->manager->netdevs, netdev->name, netdev); |
02b59d57 TG |
363 | if (r < 0) |
364 | return r; | |
365 | ||
52433f6b | 366 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 367 | |
54abf461 TG |
368 | if (netdev->kind != NETDEV_KIND_VLAN) { |
369 | r = netdev_create(netdev, NULL, NULL); | |
370 | if (r < 0) | |
371 | return r; | |
372 | } | |
02b59d57 | 373 | |
52433f6b | 374 | netdev = NULL; |
02b59d57 TG |
375 | |
376 | return 0; | |
377 | } | |
378 | ||
52433f6b | 379 | int netdev_load(Manager *manager) { |
1a436809 | 380 | NetDev *netdev; |
02b59d57 TG |
381 | char **files, **f; |
382 | int r; | |
383 | ||
384 | assert(manager); | |
385 | ||
52433f6b TG |
386 | while ((netdev = hashmap_first(manager->netdevs))) |
387 | netdev_free(netdev); | |
02b59d57 | 388 | |
2ad8416d | 389 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 TG |
390 | if (r < 0) { |
391 | log_error("Failed to enumerate netdev files: %s", strerror(-r)); | |
392 | return r; | |
393 | } | |
394 | ||
395 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 396 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
397 | if (r < 0) |
398 | return r; | |
399 | } | |
400 | ||
401 | strv_free(files); | |
402 | ||
403 | return 0; | |
404 | } |