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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 | ||
3be1d7e0 | 24 | #include "networkd-netdev.h" |
0b1831c2 | 25 | #include "networkd-link.h" |
c6f7c917 | 26 | #include "network-internal.h" |
02b59d57 TG |
27 | #include "path-util.h" |
28 | #include "conf-files.h" | |
29 | #include "conf-parser.h" | |
30 | #include "list.h" | |
5c8f858d | 31 | #include "siphash24.h" |
02b59d57 | 32 | |
3be1d7e0 TG |
33 | const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = { |
34 | [NETDEV_KIND_BRIDGE] = &bridge_vtable, | |
35 | [NETDEV_KIND_BOND] = &bond_vtable, | |
36 | [NETDEV_KIND_VLAN] = &vlan_vtable, | |
37 | [NETDEV_KIND_MACVLAN] = &macvlan_vtable, | |
38 | [NETDEV_KIND_VXLAN] = &vxlan_vtable, | |
39 | [NETDEV_KIND_IPIP] = &ipip_vtable, | |
40 | [NETDEV_KIND_GRE] = &gre_vtable, | |
41 | [NETDEV_KIND_SIT] = &sit_vtable, | |
42 | [NETDEV_KIND_VTI] = &vti_vtable, | |
43 | [NETDEV_KIND_VETH] = &veth_vtable, | |
44 | [NETDEV_KIND_DUMMY] = &dummy_vtable, | |
45 | [NETDEV_KIND_TUN] = &tun_vtable, | |
46 | [NETDEV_KIND_TAP] = &tap_vtable, | |
47 | }; | |
48 | ||
2c5859af | 49 | static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = { |
52433f6b | 50 | [NETDEV_KIND_BRIDGE] = "bridge", |
54abf461 TG |
51 | [NETDEV_KIND_BOND] = "bond", |
52 | [NETDEV_KIND_VLAN] = "vlan", | |
fe6b2d55 | 53 | [NETDEV_KIND_MACVLAN] = "macvlan", |
326cb406 | 54 | [NETDEV_KIND_VXLAN] = "vxlan", |
7951dea2 SS |
55 | [NETDEV_KIND_IPIP] = "ipip", |
56 | [NETDEV_KIND_GRE] = "gre", | |
57 | [NETDEV_KIND_SIT] = "sit", | |
10142d75 | 58 | [NETDEV_KIND_VETH] = "veth", |
9e358851 TG |
59 | [NETDEV_KIND_VTI] = "vti", |
60 | [NETDEV_KIND_DUMMY] = "dummy", | |
30ae9dfd SS |
61 | [NETDEV_KIND_TUN] = "tun", |
62 | [NETDEV_KIND_TAP] = "tap", | |
52433f6b | 63 | }; |
02b59d57 | 64 | |
1a436809 TG |
65 | DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind); |
66 | DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind"); | |
52433f6b | 67 | |
fe8ac65b | 68 | |
59cb64e6 TG |
69 | static void netdev_cancel_callbacks(NetDev *netdev) { |
70 | _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; | |
3f265037 | 71 | netdev_join_callback *callback; |
52433f6b TG |
72 | |
73 | if (!netdev) | |
02b59d57 TG |
74 | return; |
75 | ||
59cb64e6 TG |
76 | rtnl_message_new_synthetic_error(-ENODEV, 0, &m); |
77 | ||
52433f6b | 78 | while ((callback = netdev->callbacks)) { |
59cb64e6 TG |
79 | if (m) { |
80 | assert(callback->link); | |
81 | assert(callback->callback); | |
82 | assert(netdev->manager); | |
83 | assert(netdev->manager->rtnl); | |
84 | ||
85 | callback->callback(netdev->manager->rtnl, m, link); | |
86 | } | |
87 | ||
52433f6b | 88 | LIST_REMOVE(callbacks, netdev->callbacks, callback); |
02b59d57 TG |
89 | free(callback); |
90 | } | |
59cb64e6 TG |
91 | } |
92 | ||
93 | static void netdev_free(NetDev *netdev) { | |
94 | if (!netdev) | |
95 | return; | |
96 | ||
97 | netdev_cancel_callbacks(netdev); | |
02b59d57 | 98 | |
af4e9e2c TG |
99 | if (netdev->ifname) |
100 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
02b59d57 | 101 | |
52433f6b | 102 | free(netdev->filename); |
02b59d57 | 103 | |
52433f6b | 104 | free(netdev->description); |
af4e9e2c | 105 | free(netdev->ifname); |
96c90742 | 106 | free(netdev->mac); |
02b59d57 | 107 | |
79e16ce3 LP |
108 | condition_free_list(netdev->match_host); |
109 | condition_free_list(netdev->match_virt); | |
110 | condition_free_list(netdev->match_kernel); | |
111 | condition_free_list(netdev->match_arch); | |
112 | ||
aa9f1140 TG |
113 | if (NETDEV_VTABLE(netdev) && |
114 | NETDEV_VTABLE(netdev)->done) | |
115 | NETDEV_VTABLE(netdev)->done(netdev); | |
116 | ||
52433f6b | 117 | free(netdev); |
02b59d57 TG |
118 | } |
119 | ||
14b746f7 TG |
120 | NetDev *netdev_unref(NetDev *netdev) { |
121 | if (netdev && (-- netdev->n_ref <= 0)) | |
122 | netdev_free(netdev); | |
123 | ||
124 | return NULL; | |
125 | } | |
126 | ||
127 | NetDev *netdev_ref(NetDev *netdev) { | |
128 | if (netdev) | |
129 | assert_se(++ netdev->n_ref >= 2); | |
130 | ||
131 | return netdev; | |
132 | } | |
133 | ||
2cc7e981 TG |
134 | void netdev_drop(NetDev *netdev) { |
135 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
136 | return; | |
137 | ||
138 | netdev->state = NETDEV_STATE_LINGER; | |
139 | ||
5e273efe | 140 | log_debug_netdev(netdev, "netdev removed"); |
370e9930 | 141 | |
2cc7e981 TG |
142 | netdev_cancel_callbacks(netdev); |
143 | ||
144 | netdev_unref(netdev); | |
145 | ||
146 | return; | |
147 | } | |
148 | ||
1a436809 TG |
149 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
150 | NetDev *netdev; | |
02b59d57 TG |
151 | |
152 | assert(manager); | |
153 | assert(name); | |
154 | assert(ret); | |
155 | ||
52433f6b TG |
156 | netdev = hashmap_get(manager->netdevs, name); |
157 | if (!netdev) { | |
02b59d57 TG |
158 | *ret = NULL; |
159 | return -ENOENT; | |
160 | } | |
161 | ||
52433f6b | 162 | *ret = netdev; |
02b59d57 TG |
163 | |
164 | return 0; | |
165 | } | |
166 | ||
1a436809 | 167 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 168 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 TG |
169 | |
170 | return 0; | |
171 | } | |
172 | ||
1a436809 | 173 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 174 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
02b59d57 TG |
175 | int r; |
176 | ||
52433f6b TG |
177 | assert(netdev); |
178 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
179 | assert(netdev->manager); |
180 | assert(netdev->manager->rtnl); | |
3f265037 | 181 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); |
02b59d57 TG |
182 | assert(link); |
183 | assert(callback); | |
184 | ||
151b9b96 LP |
185 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, |
186 | RTM_SETLINK, link->ifindex); | |
02b59d57 | 187 | if (r < 0) { |
52433f6b | 188 | log_error_netdev(netdev, |
3333d748 ZJS |
189 | "Could not allocate RTM_SETLINK message: %s", |
190 | strerror(-r)); | |
02b59d57 TG |
191 | return r; |
192 | } | |
193 | ||
50add290 | 194 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
02b59d57 | 195 | if (r < 0) { |
52433f6b | 196 | log_error_netdev(netdev, |
3333d748 ZJS |
197 | "Could not append IFLA_MASTER attribute: %s", |
198 | strerror(-r)); | |
02b59d57 TG |
199 | return r; |
200 | } | |
201 | ||
52433f6b | 202 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
02b59d57 | 203 | if (r < 0) { |
52433f6b | 204 | log_error_netdev(netdev, |
3333d748 ZJS |
205 | "Could not send rtnetlink message: %s", |
206 | strerror(-r)); | |
02b59d57 TG |
207 | return r; |
208 | } | |
209 | ||
563c69c6 TG |
210 | link_ref(link); |
211 | ||
52433f6b | 212 | log_debug_netdev(netdev, "enslaving link '%s'", link->ifname); |
ab47d620 | 213 | |
02b59d57 TG |
214 | return 0; |
215 | } | |
216 | ||
1a436809 | 217 | static int netdev_enter_ready(NetDev *netdev) { |
3f265037 | 218 | netdev_join_callback *callback, *callback_next; |
ad0774e6 | 219 | int r; |
02b59d57 | 220 | |
52433f6b | 221 | assert(netdev); |
af4e9e2c | 222 | assert(netdev->ifname); |
924fe430 | 223 | |
ba5596ec TG |
224 | if (netdev->state != NETDEV_STATE_CREATING) |
225 | return 0; | |
226 | ||
52433f6b | 227 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 228 | |
52433f6b | 229 | log_info_netdev(netdev, "netdev ready"); |
02b59d57 | 230 | |
ad0774e6 | 231 | LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) { |
b226d99b | 232 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 233 | * link was ready */ |
ad0774e6 TG |
234 | r = netdev_enslave_ready(netdev, callback->link, callback->callback); |
235 | if (r < 0) | |
236 | return r; | |
237 | ||
238 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
239 | link_unref(callback->link); | |
240 | free(callback); | |
02b59d57 TG |
241 | } |
242 | ||
243 | return 0; | |
244 | } | |
8469c1d3 | 245 | |
d5b3d845 | 246 | /* callback for netdev's created without a backing Link */ |
52433f6b | 247 | static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
8900367c | 248 | _cleanup_netdev_unref_ NetDev *netdev = userdata; |
172f6635 | 249 | int r; |
02b59d57 | 250 | |
52433f6b | 251 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 TG |
252 | |
253 | r = sd_rtnl_message_get_errno(m); | |
e09826dc | 254 | if (r == -EEXIST) |
505f8da7 TG |
255 | log_debug_netdev(netdev, "netdev exists, using existing"); |
256 | else if (r < 0) { | |
3d94b787 | 257 | log_warning_netdev(netdev, "netdev could not be created: %s", strerror(-r)); |
37ebeb77 | 258 | netdev_drop(netdev); |
dd3efc09 TG |
259 | |
260 | return 1; | |
02b59d57 TG |
261 | } |
262 | ||
aa9f1140 TG |
263 | log_debug_netdev(netdev, "created"); |
264 | ||
dd3efc09 | 265 | return 1; |
02b59d57 TG |
266 | } |
267 | ||
3be1d7e0 | 268 | int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
b226d99b TG |
269 | int r; |
270 | ||
3f265037 TG |
271 | assert(netdev); |
272 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); | |
7951dea2 | 273 | |
52433f6b | 274 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
275 | r = netdev_enslave_ready(netdev, link, callback); |
276 | if (r < 0) | |
277 | return r; | |
02b59d57 | 278 | } else { |
52433f6b | 279 | /* the netdev is not yet read, save this request for when it is*/ |
3f265037 | 280 | netdev_join_callback *cb; |
02b59d57 | 281 | |
3f265037 | 282 | cb = new0(netdev_join_callback, 1); |
02b59d57 TG |
283 | if (!cb) |
284 | return log_oom(); | |
285 | ||
286 | cb->callback = callback; | |
287 | cb->link = link; | |
563c69c6 | 288 | link_ref(link); |
02b59d57 | 289 | |
52433f6b | 290 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
3be1d7e0 | 291 | |
aa9f1140 TG |
292 | log_debug_netdev(netdev, "will enslave '%s', when reday", |
293 | link->ifname); | |
294 | } | |
3f265037 TG |
295 | |
296 | return 0; | |
297 | } | |
298 | ||
d39edfc7 | 299 | int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) { |
c3ebdce3 | 300 | uint16_t type; |
d39edfc7 | 301 | const char *kind; |
ca4e095a LP |
302 | const char *received_kind; |
303 | const char *received_name; | |
d39edfc7 TG |
304 | int r, ifindex; |
305 | ||
50add290 | 306 | assert(netdev); |
c3ebdce3 | 307 | assert(message); |
02b59d57 | 308 | |
c3ebdce3 | 309 | r = sd_rtnl_message_get_type(message, &type); |
ba5596ec TG |
310 | if (r < 0) { |
311 | log_error_netdev(netdev, "Could not get rtnl message type"); | |
c3ebdce3 | 312 | return r; |
ba5596ec | 313 | } |
c3ebdce3 | 314 | |
ba5596ec TG |
315 | if (type != RTM_NEWLINK) { |
316 | log_error_netdev(netdev, "Can not set ifindex from unexpected rtnl message type"); | |
c3ebdce3 | 317 | return -EINVAL; |
ba5596ec | 318 | } |
d39edfc7 | 319 | |
a21df104 TG |
320 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
321 | if (r < 0) { | |
322 | log_error_netdev(netdev, "Could not get ifindex: %s", strerror(-r)); | |
323 | netdev_enter_failed(netdev); | |
324 | return r; | |
325 | } else if (ifindex <= 0) { | |
326 | log_error_netdev(netdev, "Got invalid ifindex: %d", ifindex); | |
327 | netdev_enter_failed(netdev); | |
328 | return r; | |
329 | } | |
330 | ||
a21df104 TG |
331 | if (netdev->ifindex > 0) { |
332 | if (netdev->ifindex != ifindex) { | |
333 | log_error_netdev(netdev, "Could not set ifindex to %d, already set to %d", | |
334 | ifindex, netdev->ifindex); | |
335 | netdev_enter_failed(netdev); | |
336 | return -EEXIST; | |
337 | } else | |
338 | /* ifindex already set to the same for this netdev */ | |
339 | return 0; | |
340 | } | |
341 | ||
c6315a7a TG |
342 | r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &received_name); |
343 | if (r < 0) { | |
344 | log_error_netdev(netdev, "Could not get IFNAME"); | |
345 | return r; | |
346 | } | |
347 | ||
af4e9e2c | 348 | if (!streq(netdev->ifname, received_name)) { |
c6315a7a TG |
349 | log_error_netdev(netdev, "Received newlink with wrong IFNAME %s", |
350 | received_name); | |
351 | netdev_enter_failed(netdev); | |
352 | return r; | |
353 | } | |
354 | ||
d39edfc7 TG |
355 | r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO); |
356 | if (r < 0) { | |
357 | log_error_netdev(netdev, "Could not get LINKINFO"); | |
358 | return r; | |
359 | } | |
360 | ||
361 | r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind); | |
362 | if (r < 0) { | |
363 | log_error_netdev(netdev, "Could not get KIND"); | |
364 | return r; | |
365 | } | |
366 | ||
505f8da7 TG |
367 | r = sd_rtnl_message_exit_container(message); |
368 | if (r < 0) { | |
369 | log_error_netdev(netdev, "Could not exit container"); | |
370 | return r; | |
371 | } | |
372 | ||
30ae9dfd SS |
373 | if (netdev->kind == NETDEV_KIND_TAP) |
374 | /* the kernel does not distinguish between tun and tap */ | |
375 | kind = "tun"; | |
376 | else { | |
377 | kind = netdev_kind_to_string(netdev->kind); | |
378 | if (!kind) { | |
379 | log_error_netdev(netdev, "Could not get kind"); | |
380 | netdev_enter_failed(netdev); | |
381 | return -EINVAL; | |
382 | } | |
c3ebdce3 TG |
383 | } |
384 | ||
d39edfc7 | 385 | if (!streq(kind, received_kind)) { |
30ae9dfd SS |
386 | log_error_netdev(netdev, |
387 | "Received newlink with wrong KIND %s, " | |
c6315a7a | 388 | "expected %s", received_kind, kind); |
d39edfc7 TG |
389 | netdev_enter_failed(netdev); |
390 | return r; | |
391 | } | |
392 | ||
50add290 | 393 | netdev->ifindex = ifindex; |
52433f6b | 394 | |
5261692f TG |
395 | log_debug_netdev(netdev, "netdev has index %d", netdev->ifindex); |
396 | ||
52433f6b | 397 | netdev_enter_ready(netdev); |
02b59d57 TG |
398 | |
399 | return 0; | |
400 | } | |
401 | ||
5c8f858d TG |
402 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
403 | ||
3be1d7e0 | 404 | int netdev_get_mac(const char *ifname, struct ether_addr **ret) { |
5c8f858d TG |
405 | _cleanup_free_ struct ether_addr *mac = NULL; |
406 | uint8_t result[8]; | |
407 | size_t l, sz; | |
408 | uint8_t *v; | |
409 | int r; | |
410 | ||
411 | assert(ifname); | |
412 | assert(ret); | |
413 | ||
414 | mac = new0(struct ether_addr, 1); | |
415 | if (!mac) | |
416 | return -ENOMEM; | |
417 | ||
418 | l = strlen(ifname); | |
419 | sz = sizeof(sd_id128_t) + l; | |
420 | v = alloca(sz); | |
421 | ||
422 | /* fetch some persistent data unique to the machine */ | |
423 | r = sd_id128_get_machine((sd_id128_t*) v); | |
424 | if (r < 0) | |
425 | return r; | |
426 | ||
427 | /* combine with some data unique (on this machine) to this | |
428 | * netdev */ | |
429 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
430 | ||
431 | /* Let's hash the host machine ID plus the container name. We | |
432 | * use a fixed, but originally randomly created hash key here. */ | |
433 | siphash24(result, v, sz, HASH_KEY.bytes); | |
434 | ||
435 | assert_cc(ETH_ALEN <= sizeof(result)); | |
436 | memcpy(mac->ether_addr_octet, result, ETH_ALEN); | |
437 | ||
438 | /* see eth_random_addr in the kernel */ | |
439 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
440 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
441 | ||
442 | *ret = mac; | |
443 | mac = NULL; | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
aa9f1140 TG |
448 | static int netdev_create(NetDev *netdev, Link *link) { |
449 | int r; | |
450 | ||
451 | assert(netdev); | |
452 | ||
453 | /* create netdev */ | |
454 | if (NETDEV_VTABLE(netdev)->create) { | |
455 | r = NETDEV_VTABLE(netdev)->create(netdev); | |
456 | if (r < 0) | |
457 | return r; | |
458 | ||
459 | log_debug_netdev(netdev, "created"); | |
460 | } else { | |
461 | _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; | |
462 | ||
463 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
464 | if (r < 0) { | |
465 | log_error_netdev(netdev, | |
466 | "Could not allocate RTM_NEWLINK message: %s", | |
467 | strerror(-r)); | |
468 | return r; | |
469 | } | |
470 | ||
471 | r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname); | |
472 | if (r < 0) { | |
473 | log_error_netdev(netdev, | |
474 | "Could not append IFLA_IFNAME, attribute: %s", | |
475 | strerror(-r)); | |
476 | return r; | |
477 | } | |
478 | ||
479 | if (netdev->mac) { | |
480 | r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); | |
481 | if (r < 0) { | |
482 | log_error_netdev(netdev, | |
483 | "Could not append IFLA_ADDRESS attribute: %s", | |
484 | strerror(-r)); | |
485 | return r; | |
486 | } | |
487 | } | |
488 | ||
489 | if (netdev->mtu) { | |
490 | r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu); | |
491 | if (r < 0) { | |
492 | log_error_netdev(netdev, | |
493 | "Could not append IFLA_MTU attribute: %s", | |
494 | strerror(-r)); | |
495 | return r; | |
496 | } | |
497 | } | |
498 | ||
499 | if (link) { | |
500 | r = sd_rtnl_message_append_u32(m, IFLA_LINK, link->ifindex); | |
501 | if (r < 0) { | |
502 | log_error_netdev(netdev, | |
503 | "Colud not append IFLA_LINK attribute: %s", | |
504 | strerror(-r)); | |
505 | return r; | |
506 | } | |
507 | } | |
508 | ||
509 | r = sd_rtnl_message_open_container(m, IFLA_LINKINFO); | |
510 | if (r < 0) { | |
511 | log_error_netdev(netdev, | |
512 | "Could not append IFLA_LINKINFO attribute: %s", | |
513 | strerror(-r)); | |
514 | return r; | |
515 | } | |
516 | ||
517 | r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA, | |
518 | netdev_kind_to_string(netdev->kind)); | |
519 | if (r < 0) { | |
520 | log_error_netdev(netdev, | |
521 | "Could not append IFLA_INFO_DATA attribute: %s", | |
522 | strerror(-r)); | |
523 | return r; | |
524 | } | |
525 | ||
526 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
527 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
528 | if (r < 0) | |
529 | return r; | |
530 | } | |
531 | ||
532 | r = sd_rtnl_message_close_container(m); | |
533 | if (r < 0) { | |
534 | log_error_netdev(netdev, | |
535 | "Could not append IFLA_LINKINFO attribute: %s", | |
536 | strerror(-r)); | |
537 | return r; | |
538 | } | |
539 | ||
540 | r = sd_rtnl_message_close_container(m); | |
541 | if (r < 0) { | |
542 | log_error_netdev(netdev, | |
543 | "Could not append IFLA_LINKINFO attribute: %s", | |
544 | strerror(-r)); | |
545 | return r; | |
546 | } | |
547 | ||
548 | ||
549 | r = sd_rtnl_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL); | |
550 | if (r < 0) { | |
551 | log_error_netdev(netdev, | |
552 | "Could not send rtnetlink message: %s", strerror(-r)); | |
553 | return r; | |
554 | } | |
555 | ||
556 | netdev_ref(netdev); | |
557 | ||
558 | netdev->state = NETDEV_STATE_CREATING; | |
559 | ||
560 | log_debug_netdev(netdev, "creating"); | |
561 | } | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ | |
567 | int netdev_join(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { | |
568 | int r; | |
569 | ||
570 | assert(netdev); | |
571 | assert(netdev->manager); | |
572 | assert(netdev->manager->rtnl); | |
573 | assert(NETDEV_VTABLE(netdev)); | |
574 | ||
575 | switch (NETDEV_VTABLE(netdev)->create_type) { | |
576 | case NETDEV_CREATE_MASTER: | |
577 | r = netdev_enslave(netdev, link, callback); | |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
581 | break; | |
582 | case NETDEV_CREATE_STACKED: | |
583 | r = netdev_create(netdev, link); | |
584 | if (r < 0) | |
585 | return r; | |
586 | ||
587 | break; | |
588 | default: | |
589 | assert_not_reached("Can not join independent netdev"); | |
590 | } | |
591 | ||
592 | return 0; | |
593 | } | |
594 | ||
52433f6b | 595 | static int netdev_load_one(Manager *manager, const char *filename) { |
14b746f7 | 596 | _cleanup_netdev_unref_ NetDev *netdev = NULL; |
aa9f1140 | 597 | _cleanup_free_ NetDev *netdev_raw = NULL; |
02b59d57 TG |
598 | _cleanup_fclose_ FILE *file = NULL; |
599 | int r; | |
600 | ||
bf1bc670 TA |
601 | assert(manager); |
602 | assert(filename); | |
603 | ||
02b59d57 TG |
604 | file = fopen(filename, "re"); |
605 | if (!file) { | |
606 | if (errno == ENOENT) | |
607 | return 0; | |
608 | else | |
ecb08ec6 | 609 | return -errno; |
02b59d57 TG |
610 | } |
611 | ||
ed88bcfb ZJS |
612 | if (null_or_empty_fd(fileno(file))) { |
613 | log_debug("Skipping empty file: %s", filename); | |
614 | return 0; | |
615 | } | |
616 | ||
aa9f1140 TG |
617 | netdev_raw = new0(NetDev, 1); |
618 | if (!netdev_raw) | |
02b59d57 TG |
619 | return log_oom(); |
620 | ||
aa9f1140 | 621 | netdev_raw->kind = _NETDEV_KIND_INVALID; |
02b59d57 | 622 | |
326cb406 | 623 | r = config_parse(NULL, filename, file, |
aa9f1140 | 624 | "Match\0NetDev\0", |
e9f3d2d5 | 625 | config_item_perf_lookup, network_netdev_gperf_lookup, |
aa9f1140 | 626 | true, false, true, netdev_raw); |
36f822c4 | 627 | if (r < 0) |
02b59d57 | 628 | return r; |
02b59d57 | 629 | |
aa9f1140 TG |
630 | r = fseek(file, 0, SEEK_SET); |
631 | if (r < 0) | |
632 | return -errno; | |
633 | ||
2023dc8a TG |
634 | /* skip out early if configuration does not match the environment */ |
635 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, | |
aa9f1140 TG |
636 | netdev_raw->match_host, netdev_raw->match_virt, |
637 | netdev_raw->match_kernel, netdev_raw->match_arch, | |
2023dc8a TG |
638 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
639 | return 0; | |
640 | ||
aa9f1140 | 641 | if (!NETDEV_VTABLE(netdev_raw)) { |
e46eab86 | 642 | log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename); |
52433f6b | 643 | return 0; |
3be1d7e0 | 644 | } |
2023dc8a | 645 | |
aa9f1140 | 646 | if (!netdev_raw->ifname) { |
1a436809 | 647 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
326cb406 SS |
648 | return 0; |
649 | } | |
650 | ||
aa9f1140 TG |
651 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); |
652 | if (!netdev) | |
653 | return log_oom(); | |
fe6b2d55 | 654 | |
aa9f1140 TG |
655 | netdev->n_ref = 1; |
656 | netdev->manager = manager; | |
657 | netdev->state = _NETDEV_STATE_INVALID; | |
658 | netdev->kind = netdev_raw->kind; | |
659 | netdev->ifname = netdev_raw->ifname; | |
326cb406 | 660 | |
aa9f1140 TG |
661 | if (NETDEV_VTABLE(netdev)->init) |
662 | NETDEV_VTABLE(netdev)->init(netdev); | |
663 | ||
664 | r = config_parse(NULL, filename, file, | |
665 | NETDEV_VTABLE(netdev)->sections, | |
666 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
667 | false, false, false, netdev); | |
668 | if (r < 0) | |
669 | return r; | |
670 | ||
671 | /* verify configuration */ | |
672 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
673 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
674 | if (r < 0) | |
675 | return 0; | |
fe6b2d55 TG |
676 | } |
677 | ||
52433f6b TG |
678 | netdev->filename = strdup(filename); |
679 | if (!netdev->filename) | |
02b59d57 TG |
680 | return log_oom(); |
681 | ||
5c8f858d TG |
682 | if (!netdev->mac) { |
683 | r = netdev_get_mac(netdev->ifname, &netdev->mac); | |
684 | if (r < 0) { | |
685 | log_error("Failed to generate predictable MAC address for %s", | |
686 | netdev->ifname); | |
687 | return r; | |
688 | } | |
689 | } | |
690 | ||
af4e9e2c | 691 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
02b59d57 TG |
692 | if (r < 0) |
693 | return r; | |
694 | ||
52433f6b | 695 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 696 | |
3be1d7e0 TG |
697 | log_debug_netdev(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
698 | ||
aa9f1140 TG |
699 | switch (NETDEV_VTABLE(netdev)->create_type) { |
700 | case NETDEV_CREATE_MASTER: | |
701 | case NETDEV_CREATE_INDEPENDENT: | |
702 | r = netdev_create(netdev, NULL); | |
9e358851 TG |
703 | if (r < 0) |
704 | return r; | |
705 | ||
aa9f1140 TG |
706 | break; |
707 | default: | |
708 | break; | |
54abf461 | 709 | } |
02b59d57 | 710 | |
52433f6b | 711 | netdev = NULL; |
02b59d57 TG |
712 | |
713 | return 0; | |
714 | } | |
715 | ||
52433f6b | 716 | int netdev_load(Manager *manager) { |
1a436809 | 717 | NetDev *netdev; |
02b59d57 TG |
718 | char **files, **f; |
719 | int r; | |
720 | ||
721 | assert(manager); | |
722 | ||
52433f6b | 723 | while ((netdev = hashmap_first(manager->netdevs))) |
14b746f7 | 724 | netdev_unref(netdev); |
02b59d57 | 725 | |
2ad8416d | 726 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 TG |
727 | if (r < 0) { |
728 | log_error("Failed to enumerate netdev files: %s", strerror(-r)); | |
729 | return r; | |
730 | } | |
731 | ||
732 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 733 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
734 | if (r < 0) |
735 | return r; | |
736 | } | |
737 | ||
738 | strv_free(files); | |
739 | ||
740 | return 0; | |
741 | } |