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02b59d57 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 | ||
987efa17 TG |
22 | #include <net/if.h> |
23 | ||
02b59d57 | 24 | #include "networkd.h" |
c6f7c917 | 25 | #include "network-internal.h" |
02b59d57 TG |
26 | #include "path-util.h" |
27 | #include "conf-files.h" | |
28 | #include "conf-parser.h" | |
29 | #include "list.h" | |
5c8f858d | 30 | #include "siphash24.h" |
02b59d57 | 31 | |
2c5859af | 32 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
52433f6b | 33 | [NETDEV_KIND_BRIDGE] = "bridge", |
54abf461 TG |
34 | [NETDEV_KIND_BOND] = "bond", |
35 | [NETDEV_KIND_VLAN] = "vlan", | |
fe6b2d55 | 36 | [NETDEV_KIND_MACVLAN] = "macvlan", |
326cb406 | 37 | [NETDEV_KIND_VXLAN] = "vxlan", |
7951dea2 SS |
38 | [NETDEV_KIND_IPIP] = "ipip", |
39 | [NETDEV_KIND_GRE] = "gre", | |
40 | [NETDEV_KIND_SIT] = "sit", | |
10142d75 | 41 | [NETDEV_KIND_VETH] = "veth", |
9e358851 TG |
42 | [NETDEV_KIND_VTI] = "vti", |
43 | [NETDEV_KIND_DUMMY] = "dummy", | |
52433f6b | 44 | }; |
02b59d57 | 45 | |
1a436809 TG |
46 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
47 | DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind"); | |
52433f6b | 48 | |
59cb64e6 TG |
49 | static void netdev_cancel_callbacks(NetDev *netdev) { |
50 | _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; | |
52433f6b TG |
51 | netdev_enslave_callback *callback; |
52 | ||
53 | if (!netdev) | |
02b59d57 TG |
54 | return; |
55 | ||
59cb64e6 TG |
56 | rtnl_message_new_synthetic_error(-ENODEV, 0, &m); |
57 | ||
52433f6b | 58 | while ((callback = netdev->callbacks)) { |
59cb64e6 TG |
59 | if (m) { |
60 | assert(callback->link); | |
61 | assert(callback->callback); | |
62 | assert(netdev->manager); | |
63 | assert(netdev->manager->rtnl); | |
64 | ||
65 | callback->callback(netdev->manager->rtnl, m, link); | |
66 | } | |
67 | ||
52433f6b | 68 | LIST_REMOVE(callbacks, netdev->callbacks, callback); |
02b59d57 TG |
69 | free(callback); |
70 | } | |
59cb64e6 TG |
71 | } |
72 | ||
73 | static void netdev_free(NetDev *netdev) { | |
74 | if (!netdev) | |
75 | return; | |
76 | ||
77 | netdev_cancel_callbacks(netdev); | |
02b59d57 | 78 | |
af4e9e2c TG |
79 | if (netdev->ifname) |
80 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
02b59d57 | 81 | |
52433f6b | 82 | free(netdev->filename); |
02b59d57 | 83 | |
52433f6b | 84 | free(netdev->description); |
af4e9e2c | 85 | free(netdev->ifname); |
5a3f1989 | 86 | free(netdev->ifname_peer); |
96c90742 TG |
87 | free(netdev->mac); |
88 | free(netdev->mac_peer); | |
02b59d57 | 89 | |
79e16ce3 LP |
90 | condition_free_list(netdev->match_host); |
91 | condition_free_list(netdev->match_virt); | |
92 | condition_free_list(netdev->match_kernel); | |
93 | condition_free_list(netdev->match_arch); | |
94 | ||
52433f6b | 95 | free(netdev); |
02b59d57 TG |
96 | } |
97 | ||
14b746f7 TG |
98 | NetDev *netdev_unref(NetDev *netdev) { |
99 | if (netdev && (-- netdev->n_ref <= 0)) | |
100 | netdev_free(netdev); | |
101 | ||
102 | return NULL; | |
103 | } | |
104 | ||
105 | NetDev *netdev_ref(NetDev *netdev) { | |
106 | if (netdev) | |
107 | assert_se(++ netdev->n_ref >= 2); | |
108 | ||
109 | return netdev; | |
110 | } | |
111 | ||
2cc7e981 TG |
112 | void netdev_drop(NetDev *netdev) { |
113 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
114 | return; | |
115 | ||
116 | netdev->state = NETDEV_STATE_LINGER; | |
117 | ||
5e273efe | 118 | log_debug_netdev(netdev, "netdev removed"); |
370e9930 | 119 | |
2cc7e981 TG |
120 | netdev_cancel_callbacks(netdev); |
121 | ||
122 | netdev_unref(netdev); | |
123 | ||
124 | return; | |
125 | } | |
126 | ||
1a436809 TG |
127 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
128 | NetDev *netdev; | |
02b59d57 TG |
129 | |
130 | assert(manager); | |
131 | assert(name); | |
132 | assert(ret); | |
133 | ||
52433f6b TG |
134 | netdev = hashmap_get(manager->netdevs, name); |
135 | if (!netdev) { | |
02b59d57 TG |
136 | *ret = NULL; |
137 | return -ENOENT; | |
138 | } | |
139 | ||
52433f6b | 140 | *ret = netdev; |
02b59d57 TG |
141 | |
142 | return 0; | |
143 | } | |
144 | ||
1a436809 | 145 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 146 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 TG |
147 | |
148 | return 0; | |
149 | } | |
150 | ||
1a436809 | 151 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 152 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
02b59d57 TG |
153 | int r; |
154 | ||
52433f6b TG |
155 | assert(netdev); |
156 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
157 | assert(netdev->manager); |
158 | assert(netdev->manager->rtnl); | |
02b59d57 TG |
159 | assert(link); |
160 | assert(callback); | |
161 | ||
151b9b96 LP |
162 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, |
163 | RTM_SETLINK, link->ifindex); | |
02b59d57 | 164 | if (r < 0) { |
52433f6b | 165 | log_error_netdev(netdev, |
3333d748 ZJS |
166 | "Could not allocate RTM_SETLINK message: %s", |
167 | strerror(-r)); | |
02b59d57 TG |
168 | return r; |
169 | } | |
170 | ||
50add290 | 171 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
02b59d57 | 172 | if (r < 0) { |
52433f6b | 173 | log_error_netdev(netdev, |
3333d748 ZJS |
174 | "Could not append IFLA_MASTER attribute: %s", |
175 | strerror(-r)); | |
02b59d57 TG |
176 | return r; |
177 | } | |
178 | ||
52433f6b | 179 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
02b59d57 | 180 | if (r < 0) { |
52433f6b | 181 | log_error_netdev(netdev, |
3333d748 ZJS |
182 | "Could not send rtnetlink message: %s", |
183 | strerror(-r)); | |
02b59d57 TG |
184 | return r; |
185 | } | |
186 | ||
563c69c6 TG |
187 | link_ref(link); |
188 | ||
52433f6b | 189 | log_debug_netdev(netdev, "enslaving link '%s'", link->ifname); |
ab47d620 | 190 | |
02b59d57 TG |
191 | return 0; |
192 | } | |
193 | ||
1a436809 | 194 | static int netdev_enter_ready(NetDev *netdev) { |
52433f6b | 195 | netdev_enslave_callback *callback; |
02b59d57 | 196 | |
52433f6b | 197 | assert(netdev); |
af4e9e2c | 198 | assert(netdev->ifname); |
924fe430 | 199 | |
ba5596ec TG |
200 | if (netdev->state != NETDEV_STATE_CREATING) |
201 | return 0; | |
202 | ||
52433f6b | 203 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 204 | |
52433f6b | 205 | log_info_netdev(netdev, "netdev ready"); |
02b59d57 | 206 | |
52433f6b | 207 | LIST_FOREACH(callbacks, callback, netdev->callbacks) { |
b226d99b | 208 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 209 | * link was ready */ |
52433f6b | 210 | netdev_enslave_ready(netdev, callback->link, callback->callback); |
02b59d57 TG |
211 | } |
212 | ||
213 | return 0; | |
214 | } | |
8469c1d3 | 215 | |
d5b3d845 | 216 | /* callback for netdev's created without a backing Link */ |
52433f6b | 217 | static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
8900367c | 218 | _cleanup_netdev_unref_ NetDev *netdev = userdata; |
172f6635 | 219 | int r; |
02b59d57 | 220 | |
52433f6b | 221 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 TG |
222 | |
223 | r = sd_rtnl_message_get_errno(m); | |
e09826dc | 224 | if (r == -EEXIST) |
505f8da7 TG |
225 | log_debug_netdev(netdev, "netdev exists, using existing"); |
226 | else if (r < 0) { | |
3d94b787 | 227 | log_warning_netdev(netdev, "netdev could not be created: %s", strerror(-r)); |
37ebeb77 | 228 | netdev_drop(netdev); |
dd3efc09 TG |
229 | |
230 | return 1; | |
02b59d57 TG |
231 | } |
232 | ||
dd3efc09 | 233 | return 1; |
02b59d57 TG |
234 | } |
235 | ||
7951dea2 SS |
236 | int config_parse_tunnel_address(const char *unit, |
237 | const char *filename, | |
238 | unsigned line, | |
239 | const char *section, | |
240 | unsigned section_line, | |
241 | const char *lvalue, | |
242 | int ltype, | |
243 | const char *rvalue, | |
244 | void *data, | |
245 | void *userdata) { | |
246 | NetDev *n = data; | |
247 | unsigned char family = AF_INET; | |
248 | int r; | |
249 | ||
250 | assert(filename); | |
251 | assert(lvalue); | |
252 | assert(rvalue); | |
253 | assert(data); | |
254 | ||
255 | r = net_parse_inaddr(rvalue, &family, n); | |
256 | if (r < 0) { | |
257 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
258 | "Tunnel address is invalid, ignoring assignment: %s", rvalue); | |
259 | return 0; | |
260 | } | |
261 | return 0; | |
262 | } | |
263 | ||
0372cb2b | 264 | static int netdev_create(NetDev *netdev) { |
cf6a8911 | 265 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
52433f6b | 266 | const char *kind; |
02b59d57 TG |
267 | int r; |
268 | ||
52433f6b | 269 | assert(netdev); |
af4e9e2c | 270 | assert(netdev->ifname); |
52433f6b TG |
271 | assert(netdev->manager); |
272 | assert(netdev->manager->rtnl); | |
02b59d57 | 273 | |
151b9b96 | 274 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, 0); |
02b59d57 | 275 | if (r < 0) { |
52433f6b | 276 | log_error_netdev(netdev, |
3333d748 ZJS |
277 | "Could not allocate RTM_NEWLINK message: %s", |
278 | strerror(-r)); | |
02b59d57 TG |
279 | return r; |
280 | } | |
281 | ||
af4e9e2c | 282 | r = sd_rtnl_message_append_string(req, IFLA_IFNAME, netdev->ifname); |
02b59d57 | 283 | if (r < 0) { |
52433f6b | 284 | log_error_netdev(netdev, |
3333d748 ZJS |
285 | "Could not append IFLA_IFNAME attribute: %s", |
286 | strerror(-r)); | |
02b59d57 TG |
287 | return r; |
288 | } | |
289 | ||
96c90742 | 290 | if (netdev->mtu) { |
7951dea2 SS |
291 | r = sd_rtnl_message_append_u32(req, IFLA_MTU, netdev->mtu); |
292 | if (r < 0) { | |
293 | log_error_netdev(netdev, | |
294 | "Could not append IFLA_MTU attribute: %s", | |
295 | strerror(-r)); | |
296 | return r; | |
297 | } | |
298 | } | |
299 | ||
96c90742 TG |
300 | if (netdev->mac) { |
301 | r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, netdev->mac); | |
302 | if (r < 0) { | |
303 | log_error_netdev(netdev, | |
304 | "Colud not append IFLA_ADDRESS attribute: %s", | |
305 | strerror(-r)); | |
306 | return r; | |
307 | } | |
308 | } | |
309 | ||
ee3a6a51 | 310 | r = sd_rtnl_message_open_container(req, IFLA_LINKINFO); |
02b59d57 | 311 | if (r < 0) { |
52433f6b | 312 | log_error_netdev(netdev, |
3333d748 ZJS |
313 | "Could not open IFLA_LINKINFO container: %s", |
314 | strerror(-r)); | |
02b59d57 TG |
315 | return r; |
316 | } | |
317 | ||
52433f6b TG |
318 | kind = netdev_kind_to_string(netdev->kind); |
319 | if (!kind) { | |
320 | log_error_netdev(netdev, "Invalid kind"); | |
321 | return -EINVAL; | |
322 | } | |
323 | ||
d8e538ec | 324 | r = sd_rtnl_message_open_container_union(req, IFLA_INFO_DATA, kind); |
02b59d57 | 325 | if (r < 0) { |
52433f6b | 326 | log_error_netdev(netdev, |
d8e538ec TG |
327 | "Could not open IFLA_INFO_DATA container: %s", |
328 | strerror(-r)); | |
02b59d57 TG |
329 | return r; |
330 | } | |
331 | ||
d8e538ec TG |
332 | r = sd_rtnl_message_close_container(req); |
333 | if (r < 0) { | |
334 | log_error_netdev(netdev, | |
335 | "Could not close IFLA_INFO_DATA container %s", | |
336 | strerror(-r)); | |
337 | return r; | |
338 | } | |
339 | ||
02b59d57 TG |
340 | r = sd_rtnl_message_close_container(req); |
341 | if (r < 0) { | |
52433f6b | 342 | log_error_netdev(netdev, |
3333d748 ZJS |
343 | "Could not close IFLA_LINKINFO container %s", |
344 | strerror(-r)); | |
02b59d57 TG |
345 | return r; |
346 | } | |
347 | ||
0372cb2b TG |
348 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, &netdev_create_handler, netdev, 0, NULL); |
349 | if (r < 0) { | |
52433f6b | 350 | log_error_netdev(netdev, |
3333d748 | 351 | "Could not send rtnetlink message: %s", strerror(-r)); |
02b59d57 TG |
352 | return r; |
353 | } | |
354 | ||
0372cb2b TG |
355 | netdev_ref(netdev); |
356 | ||
52433f6b | 357 | log_debug_netdev(netdev, "creating netdev"); |
02b59d57 | 358 | |
52433f6b | 359 | netdev->state = NETDEV_STATE_CREATING; |
02b59d57 TG |
360 | |
361 | return 0; | |
362 | } | |
363 | ||
d5b3d845 | 364 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ |
1a436809 | 365 | int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
b226d99b TG |
366 | int r; |
367 | ||
326cb406 SS |
368 | switch(netdev->kind) { |
369 | case NETDEV_KIND_VLAN: | |
0372cb2b | 370 | return netdev_create_vlan(netdev, link, callback); |
326cb406 | 371 | case NETDEV_KIND_MACVLAN: |
0372cb2b | 372 | return netdev_create_macvlan(netdev, link, callback); |
326cb406 SS |
373 | case NETDEV_KIND_VXLAN: |
374 | return netdev_create_vxlan(netdev, link, callback); | |
375 | case NETDEV_KIND_IPIP: | |
376 | case NETDEV_KIND_GRE: | |
377 | case NETDEV_KIND_SIT: | |
378 | case NETDEV_KIND_VTI: | |
d5b3d845 | 379 | return netdev_create_tunnel(netdev, link, callback); |
326cb406 SS |
380 | default: |
381 | break; | |
382 | } | |
7951dea2 | 383 | |
52433f6b | 384 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
385 | r = netdev_enslave_ready(netdev, link, callback); |
386 | if (r < 0) | |
387 | return r; | |
02b59d57 | 388 | } else { |
52433f6b TG |
389 | /* the netdev is not yet read, save this request for when it is*/ |
390 | netdev_enslave_callback *cb; | |
02b59d57 | 391 | |
52433f6b | 392 | cb = new0(netdev_enslave_callback, 1); |
02b59d57 TG |
393 | if (!cb) |
394 | return log_oom(); | |
395 | ||
396 | cb->callback = callback; | |
397 | cb->link = link; | |
563c69c6 | 398 | link_ref(link); |
02b59d57 | 399 | |
52433f6b | 400 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
02b59d57 TG |
401 | } |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
d39edfc7 | 406 | int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) { |
c3ebdce3 | 407 | uint16_t type; |
d39edfc7 TG |
408 | const char *kind; |
409 | char *received_kind; | |
c6315a7a | 410 | char *received_name; |
d39edfc7 TG |
411 | int r, ifindex; |
412 | ||
50add290 | 413 | assert(netdev); |
c3ebdce3 | 414 | assert(message); |
02b59d57 | 415 | |
c3ebdce3 | 416 | r = sd_rtnl_message_get_type(message, &type); |
ba5596ec TG |
417 | if (r < 0) { |
418 | log_error_netdev(netdev, "Could not get rtnl message type"); | |
c3ebdce3 | 419 | return r; |
ba5596ec | 420 | } |
c3ebdce3 | 421 | |
ba5596ec TG |
422 | if (type != RTM_NEWLINK) { |
423 | log_error_netdev(netdev, "Can not set ifindex from unexpected rtnl message type"); | |
c3ebdce3 | 424 | return -EINVAL; |
ba5596ec | 425 | } |
d39edfc7 | 426 | |
a21df104 TG |
427 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
428 | if (r < 0) { | |
429 | log_error_netdev(netdev, "Could not get ifindex: %s", strerror(-r)); | |
430 | netdev_enter_failed(netdev); | |
431 | return r; | |
432 | } else if (ifindex <= 0) { | |
433 | log_error_netdev(netdev, "Got invalid ifindex: %d", ifindex); | |
434 | netdev_enter_failed(netdev); | |
435 | return r; | |
436 | } | |
437 | ||
a21df104 TG |
438 | if (netdev->ifindex > 0) { |
439 | if (netdev->ifindex != ifindex) { | |
440 | log_error_netdev(netdev, "Could not set ifindex to %d, already set to %d", | |
441 | ifindex, netdev->ifindex); | |
442 | netdev_enter_failed(netdev); | |
443 | return -EEXIST; | |
444 | } else | |
445 | /* ifindex already set to the same for this netdev */ | |
446 | return 0; | |
447 | } | |
448 | ||
c6315a7a TG |
449 | r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &received_name); |
450 | if (r < 0) { | |
451 | log_error_netdev(netdev, "Could not get IFNAME"); | |
452 | return r; | |
453 | } | |
454 | ||
af4e9e2c | 455 | if (!streq(netdev->ifname, received_name)) { |
c6315a7a TG |
456 | log_error_netdev(netdev, "Received newlink with wrong IFNAME %s", |
457 | received_name); | |
458 | netdev_enter_failed(netdev); | |
459 | return r; | |
460 | } | |
461 | ||
d39edfc7 TG |
462 | r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO); |
463 | if (r < 0) { | |
464 | log_error_netdev(netdev, "Could not get LINKINFO"); | |
465 | return r; | |
466 | } | |
467 | ||
468 | r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind); | |
469 | if (r < 0) { | |
470 | log_error_netdev(netdev, "Could not get KIND"); | |
471 | return r; | |
472 | } | |
473 | ||
505f8da7 TG |
474 | r = sd_rtnl_message_exit_container(message); |
475 | if (r < 0) { | |
476 | log_error_netdev(netdev, "Could not exit container"); | |
477 | return r; | |
478 | } | |
479 | ||
c3ebdce3 TG |
480 | kind = netdev_kind_to_string(netdev->kind); |
481 | if (!kind) { | |
482 | log_error_netdev(netdev, "Could not get kind"); | |
483 | netdev_enter_failed(netdev); | |
484 | return -EINVAL; | |
485 | } | |
486 | ||
d39edfc7 | 487 | if (!streq(kind, received_kind)) { |
c6315a7a TG |
488 | log_error_netdev(netdev, "Received newlink with wrong KIND %s, " |
489 | "expected %s", received_kind, kind); | |
d39edfc7 TG |
490 | netdev_enter_failed(netdev); |
491 | return r; | |
492 | } | |
493 | ||
50add290 | 494 | netdev->ifindex = ifindex; |
52433f6b | 495 | |
5261692f TG |
496 | log_debug_netdev(netdev, "netdev has index %d", netdev->ifindex); |
497 | ||
52433f6b | 498 | netdev_enter_ready(netdev); |
02b59d57 TG |
499 | |
500 | return 0; | |
501 | } | |
502 | ||
5c8f858d TG |
503 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
504 | ||
505 | static int netdev_get_mac(const char *ifname, struct ether_addr **ret) { | |
506 | _cleanup_free_ struct ether_addr *mac = NULL; | |
507 | uint8_t result[8]; | |
508 | size_t l, sz; | |
509 | uint8_t *v; | |
510 | int r; | |
511 | ||
512 | assert(ifname); | |
513 | assert(ret); | |
514 | ||
515 | mac = new0(struct ether_addr, 1); | |
516 | if (!mac) | |
517 | return -ENOMEM; | |
518 | ||
519 | l = strlen(ifname); | |
520 | sz = sizeof(sd_id128_t) + l; | |
521 | v = alloca(sz); | |
522 | ||
523 | /* fetch some persistent data unique to the machine */ | |
524 | r = sd_id128_get_machine((sd_id128_t*) v); | |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | /* combine with some data unique (on this machine) to this | |
529 | * netdev */ | |
530 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
531 | ||
532 | /* Let's hash the host machine ID plus the container name. We | |
533 | * use a fixed, but originally randomly created hash key here. */ | |
534 | siphash24(result, v, sz, HASH_KEY.bytes); | |
535 | ||
536 | assert_cc(ETH_ALEN <= sizeof(result)); | |
537 | memcpy(mac->ether_addr_octet, result, ETH_ALEN); | |
538 | ||
539 | /* see eth_random_addr in the kernel */ | |
540 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
541 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
542 | ||
543 | *ret = mac; | |
544 | mac = NULL; | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
52433f6b | 549 | static int netdev_load_one(Manager *manager, const char *filename) { |
14b746f7 | 550 | _cleanup_netdev_unref_ NetDev *netdev = NULL; |
02b59d57 TG |
551 | _cleanup_fclose_ FILE *file = NULL; |
552 | int r; | |
553 | ||
bf1bc670 TA |
554 | assert(manager); |
555 | assert(filename); | |
556 | ||
6916ec29 TG |
557 | if (null_or_empty_path(filename)) { |
558 | log_debug("skipping empty file: %s", filename); | |
559 | return 0; | |
560 | } | |
561 | ||
02b59d57 TG |
562 | file = fopen(filename, "re"); |
563 | if (!file) { | |
564 | if (errno == ENOENT) | |
565 | return 0; | |
566 | else | |
ecb08ec6 | 567 | return -errno; |
02b59d57 TG |
568 | } |
569 | ||
1a436809 | 570 | netdev = new0(NetDev, 1); |
52433f6b | 571 | if (!netdev) |
02b59d57 TG |
572 | return log_oom(); |
573 | ||
14b746f7 | 574 | netdev->n_ref = 1; |
52433f6b TG |
575 | netdev->manager = manager; |
576 | netdev->state = _NETDEV_STATE_INVALID; | |
577 | netdev->kind = _NETDEV_KIND_INVALID; | |
fe6b2d55 | 578 | netdev->macvlan_mode = _NETDEV_MACVLAN_MODE_INVALID; |
672682a6 | 579 | netdev->vlanid = VLANID_MAX + 1; |
326cb406 | 580 | netdev->vxlanid = VXLAN_VID_MAX + 1; |
a9f434cf | 581 | netdev->tunnel_pmtudisc = true; |
326cb406 | 582 | netdev->learning = true; |
02b59d57 | 583 | |
326cb406 SS |
584 | r = config_parse(NULL, filename, file, |
585 | "Match\0NetDev\0VLAN\0MACVLAN\0VXLAN\0Tunnel\0Peer\0", | |
fe6b2d55 TG |
586 | config_item_perf_lookup, (void*) network_netdev_gperf_lookup, |
587 | false, false, netdev); | |
02b59d57 TG |
588 | if (r < 0) { |
589 | log_warning("Could not parse config file %s: %s", filename, strerror(-r)); | |
590 | return r; | |
449f7554 | 591 | } |
02b59d57 | 592 | |
52433f6b | 593 | if (netdev->kind == _NETDEV_KIND_INVALID) { |
1a436809 | 594 | log_warning("NetDev without Kind configured in %s. Ignoring", filename); |
52433f6b TG |
595 | return 0; |
596 | } | |
597 | ||
af4e9e2c | 598 | if (!netdev->ifname) { |
1a436809 | 599 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
02b59d57 TG |
600 | return 0; |
601 | } | |
602 | ||
672682a6 TG |
603 | if (netdev->kind == NETDEV_KIND_VLAN && netdev->vlanid > VLANID_MAX) { |
604 | log_warning("VLAN without valid Id configured in %s. Ignoring", filename); | |
54abf461 TG |
605 | return 0; |
606 | } | |
607 | ||
326cb406 SS |
608 | if (netdev->kind == NETDEV_KIND_VXLAN && netdev->vxlanid > VXLAN_VID_MAX) { |
609 | log_warning("VXLAN without valid Id configured in %s. Ignoring", filename); | |
610 | return 0; | |
611 | } | |
612 | ||
fe6b2d55 TG |
613 | if (netdev->kind != NETDEV_KIND_VLAN && netdev->vlanid <= VLANID_MAX) { |
614 | log_warning("VLAN Id configured for a %s in %s. Ignoring", | |
615 | netdev_kind_to_string(netdev->kind), filename); | |
616 | return 0; | |
617 | } | |
618 | ||
ee6b5089 TG |
619 | if (netdev->kind != NETDEV_KIND_VXLAN && netdev->vxlanid <= VXLAN_VID_MAX) { |
620 | log_warning("VXLAN Id configured for a %s in %s. Ignoring", | |
326cb406 SS |
621 | netdev_kind_to_string(netdev->kind), filename); |
622 | return 0; | |
623 | } | |
624 | ||
fe6b2d55 TG |
625 | if (netdev->kind != NETDEV_KIND_MACVLAN && |
626 | netdev->macvlan_mode != _NETDEV_MACVLAN_MODE_INVALID) { | |
627 | log_warning("MACVLAN Mode configured for a %s in %s. Ignoring", | |
628 | netdev_kind_to_string(netdev->kind), filename); | |
629 | return 0; | |
630 | } | |
631 | ||
52433f6b TG |
632 | netdev->filename = strdup(filename); |
633 | if (!netdev->filename) | |
02b59d57 TG |
634 | return log_oom(); |
635 | ||
c0dda186 | 636 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, |
edbb03e9 TG |
637 | netdev->match_host, netdev->match_virt, |
638 | netdev->match_kernel, netdev->match_arch, | |
bf175aaf | 639 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
c0dda186 TG |
640 | return 0; |
641 | ||
5c8f858d TG |
642 | if (!netdev->mac) { |
643 | r = netdev_get_mac(netdev->ifname, &netdev->mac); | |
644 | if (r < 0) { | |
645 | log_error("Failed to generate predictable MAC address for %s", | |
646 | netdev->ifname); | |
647 | return r; | |
648 | } | |
649 | } | |
650 | ||
af4e9e2c | 651 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
02b59d57 TG |
652 | if (r < 0) |
653 | return r; | |
654 | ||
52433f6b | 655 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 656 | |
6278a201 TG |
657 | switch (netdev->kind) { |
658 | case NETDEV_KIND_VETH: | |
5a1045a5 TG |
659 | if (!netdev->ifname_peer) { |
660 | log_warning("Veth NetDev without peer name configured " | |
5c8f858d TG |
661 | "in %s. Ignoring", filename); |
662 | return 0; | |
663 | } | |
664 | ||
665 | if (!netdev->mac) { | |
666 | r = netdev_get_mac(netdev->ifname_peer, &netdev->mac_peer); | |
667 | if (r < 0) { | |
668 | log_error("Failed to generate predictable MAC address for %s", | |
669 | netdev->ifname_peer); | |
670 | return r; | |
671 | } | |
672 | } | |
673 | ||
6278a201 TG |
674 | r = netdev_create_veth(netdev, netdev_create_handler); |
675 | if (r < 0) | |
676 | return r; | |
10142d75 | 677 | |
9e358851 TG |
678 | break; |
679 | case NETDEV_KIND_DUMMY: | |
680 | r = netdev_create_dummy(netdev, netdev_create_handler); | |
681 | if (r < 0) | |
682 | return r; | |
683 | ||
6278a201 TG |
684 | break; |
685 | case NETDEV_KIND_BRIDGE: | |
686 | case NETDEV_KIND_BOND: | |
0372cb2b | 687 | r = netdev_create(netdev); |
54abf461 TG |
688 | if (r < 0) |
689 | return r; | |
6278a201 TG |
690 | break; |
691 | default: | |
692 | break; | |
54abf461 | 693 | } |
02b59d57 | 694 | |
69ceb044 TG |
695 | log_debug_netdev(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
696 | ||
52433f6b | 697 | netdev = NULL; |
02b59d57 TG |
698 | |
699 | return 0; | |
700 | } | |
701 | ||
52433f6b | 702 | int netdev_load(Manager *manager) { |
1a436809 | 703 | NetDev *netdev; |
02b59d57 TG |
704 | char **files, **f; |
705 | int r; | |
706 | ||
707 | assert(manager); | |
708 | ||
52433f6b | 709 | while ((netdev = hashmap_first(manager->netdevs))) |
14b746f7 | 710 | netdev_unref(netdev); |
02b59d57 | 711 | |
2ad8416d | 712 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 TG |
713 | if (r < 0) { |
714 | log_error("Failed to enumerate netdev files: %s", strerror(-r)); | |
715 | return r; | |
716 | } | |
717 | ||
718 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 719 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
720 | if (r < 0) |
721 | return r; | |
722 | } | |
723 | ||
724 | strv_free(files); | |
725 | ||
726 | return 0; | |
727 | } |