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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 | |
59cb64e6 TG |
68 | static void netdev_cancel_callbacks(NetDev *netdev) { |
69 | _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; | |
3f265037 | 70 | netdev_join_callback *callback; |
52433f6b TG |
71 | |
72 | if (!netdev) | |
02b59d57 TG |
73 | return; |
74 | ||
59cb64e6 TG |
75 | rtnl_message_new_synthetic_error(-ENODEV, 0, &m); |
76 | ||
52433f6b | 77 | while ((callback = netdev->callbacks)) { |
59cb64e6 TG |
78 | if (m) { |
79 | assert(callback->link); | |
80 | assert(callback->callback); | |
81 | assert(netdev->manager); | |
82 | assert(netdev->manager->rtnl); | |
83 | ||
84 | callback->callback(netdev->manager->rtnl, m, link); | |
85 | } | |
86 | ||
52433f6b | 87 | LIST_REMOVE(callbacks, netdev->callbacks, callback); |
02b59d57 TG |
88 | free(callback); |
89 | } | |
59cb64e6 TG |
90 | } |
91 | ||
92 | static void netdev_free(NetDev *netdev) { | |
93 | if (!netdev) | |
94 | return; | |
95 | ||
96 | netdev_cancel_callbacks(netdev); | |
02b59d57 | 97 | |
af4e9e2c TG |
98 | if (netdev->ifname) |
99 | hashmap_remove(netdev->manager->netdevs, netdev->ifname); | |
02b59d57 | 100 | |
52433f6b | 101 | free(netdev->filename); |
02b59d57 | 102 | |
52433f6b | 103 | free(netdev->description); |
af4e9e2c | 104 | free(netdev->ifname); |
96c90742 | 105 | free(netdev->mac); |
02b59d57 | 106 | |
79e16ce3 LP |
107 | condition_free_list(netdev->match_host); |
108 | condition_free_list(netdev->match_virt); | |
109 | condition_free_list(netdev->match_kernel); | |
110 | condition_free_list(netdev->match_arch); | |
111 | ||
aa9f1140 TG |
112 | if (NETDEV_VTABLE(netdev) && |
113 | NETDEV_VTABLE(netdev)->done) | |
114 | NETDEV_VTABLE(netdev)->done(netdev); | |
115 | ||
52433f6b | 116 | free(netdev); |
02b59d57 TG |
117 | } |
118 | ||
14b746f7 TG |
119 | NetDev *netdev_unref(NetDev *netdev) { |
120 | if (netdev && (-- netdev->n_ref <= 0)) | |
121 | netdev_free(netdev); | |
122 | ||
123 | return NULL; | |
124 | } | |
125 | ||
126 | NetDev *netdev_ref(NetDev *netdev) { | |
127 | if (netdev) | |
128 | assert_se(++ netdev->n_ref >= 2); | |
129 | ||
130 | return netdev; | |
131 | } | |
132 | ||
2cc7e981 TG |
133 | void netdev_drop(NetDev *netdev) { |
134 | if (!netdev || netdev->state == NETDEV_STATE_LINGER) | |
135 | return; | |
136 | ||
137 | netdev->state = NETDEV_STATE_LINGER; | |
138 | ||
79008bdd | 139 | log_netdev_debug(netdev, "netdev removed"); |
370e9930 | 140 | |
2cc7e981 TG |
141 | netdev_cancel_callbacks(netdev); |
142 | ||
143 | netdev_unref(netdev); | |
144 | ||
145 | return; | |
146 | } | |
147 | ||
1a436809 TG |
148 | int netdev_get(Manager *manager, const char *name, NetDev **ret) { |
149 | NetDev *netdev; | |
02b59d57 TG |
150 | |
151 | assert(manager); | |
152 | assert(name); | |
153 | assert(ret); | |
154 | ||
52433f6b TG |
155 | netdev = hashmap_get(manager->netdevs, name); |
156 | if (!netdev) { | |
02b59d57 TG |
157 | *ret = NULL; |
158 | return -ENOENT; | |
159 | } | |
160 | ||
52433f6b | 161 | *ret = netdev; |
02b59d57 TG |
162 | |
163 | return 0; | |
164 | } | |
165 | ||
1a436809 | 166 | static int netdev_enter_failed(NetDev *netdev) { |
52433f6b | 167 | netdev->state = NETDEV_STATE_FAILED; |
02b59d57 TG |
168 | |
169 | return 0; | |
170 | } | |
171 | ||
1a436809 | 172 | static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_rtnl_message_handler_t callback) { |
cf6a8911 | 173 | _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; |
02b59d57 TG |
174 | int r; |
175 | ||
52433f6b TG |
176 | assert(netdev); |
177 | assert(netdev->state == NETDEV_STATE_READY); | |
4fb7242c TG |
178 | assert(netdev->manager); |
179 | assert(netdev->manager->rtnl); | |
3f265037 | 180 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); |
02b59d57 TG |
181 | assert(link); |
182 | assert(callback); | |
183 | ||
151b9b96 LP |
184 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, |
185 | RTM_SETLINK, link->ifindex); | |
02b59d57 | 186 | if (r < 0) { |
79008bdd | 187 | log_netdev_error(netdev, |
3333d748 ZJS |
188 | "Could not allocate RTM_SETLINK message: %s", |
189 | strerror(-r)); | |
02b59d57 TG |
190 | return r; |
191 | } | |
192 | ||
50add290 | 193 | r = sd_rtnl_message_append_u32(req, IFLA_MASTER, netdev->ifindex); |
02b59d57 | 194 | if (r < 0) { |
79008bdd | 195 | log_netdev_error(netdev, |
3333d748 ZJS |
196 | "Could not append IFLA_MASTER attribute: %s", |
197 | strerror(-r)); | |
02b59d57 TG |
198 | return r; |
199 | } | |
200 | ||
52433f6b | 201 | r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL); |
02b59d57 | 202 | if (r < 0) { |
79008bdd | 203 | log_netdev_error(netdev, |
3333d748 ZJS |
204 | "Could not send rtnetlink message: %s", |
205 | strerror(-r)); | |
02b59d57 TG |
206 | return r; |
207 | } | |
208 | ||
563c69c6 TG |
209 | link_ref(link); |
210 | ||
79008bdd | 211 | log_netdev_debug(netdev, "enslaving link '%s'", link->ifname); |
ab47d620 | 212 | |
02b59d57 TG |
213 | return 0; |
214 | } | |
215 | ||
1a436809 | 216 | static int netdev_enter_ready(NetDev *netdev) { |
3f265037 | 217 | netdev_join_callback *callback, *callback_next; |
ad0774e6 | 218 | int r; |
02b59d57 | 219 | |
52433f6b | 220 | assert(netdev); |
af4e9e2c | 221 | assert(netdev->ifname); |
924fe430 | 222 | |
ba5596ec TG |
223 | if (netdev->state != NETDEV_STATE_CREATING) |
224 | return 0; | |
225 | ||
52433f6b | 226 | netdev->state = NETDEV_STATE_READY; |
02b59d57 | 227 | |
52433f6b | 228 | log_info_netdev(netdev, "netdev ready"); |
02b59d57 | 229 | |
ad0774e6 | 230 | LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) { |
b226d99b | 231 | /* enslave the links that were attempted to be enslaved before the |
02b59d57 | 232 | * link was ready */ |
ad0774e6 TG |
233 | r = netdev_enslave_ready(netdev, callback->link, callback->callback); |
234 | if (r < 0) | |
235 | return r; | |
236 | ||
237 | LIST_REMOVE(callbacks, netdev->callbacks, callback); | |
238 | link_unref(callback->link); | |
239 | free(callback); | |
02b59d57 TG |
240 | } |
241 | ||
242 | return 0; | |
243 | } | |
8469c1d3 | 244 | |
d5b3d845 | 245 | /* callback for netdev's created without a backing Link */ |
52433f6b | 246 | static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { |
8900367c | 247 | _cleanup_netdev_unref_ NetDev *netdev = userdata; |
172f6635 | 248 | int r; |
02b59d57 | 249 | |
52433f6b | 250 | assert(netdev->state != _NETDEV_STATE_INVALID); |
02b59d57 TG |
251 | |
252 | r = sd_rtnl_message_get_errno(m); | |
e09826dc | 253 | if (r == -EEXIST) |
79008bdd | 254 | log_netdev_debug(netdev, "netdev exists, using existing"); |
505f8da7 | 255 | else if (r < 0) { |
3d94b787 | 256 | log_warning_netdev(netdev, "netdev could not be created: %s", strerror(-r)); |
37ebeb77 | 257 | netdev_drop(netdev); |
dd3efc09 TG |
258 | |
259 | return 1; | |
02b59d57 TG |
260 | } |
261 | ||
79008bdd | 262 | log_netdev_debug(netdev, "created"); |
aa9f1140 | 263 | |
dd3efc09 | 264 | return 1; |
02b59d57 TG |
265 | } |
266 | ||
3be1d7e0 | 267 | int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { |
b226d99b TG |
268 | int r; |
269 | ||
3f265037 TG |
270 | assert(netdev); |
271 | assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND)); | |
7951dea2 | 272 | |
52433f6b | 273 | if (netdev->state == NETDEV_STATE_READY) { |
b226d99b TG |
274 | r = netdev_enslave_ready(netdev, link, callback); |
275 | if (r < 0) | |
276 | return r; | |
02b59d57 | 277 | } else { |
52433f6b | 278 | /* the netdev is not yet read, save this request for when it is*/ |
3f265037 | 279 | netdev_join_callback *cb; |
02b59d57 | 280 | |
3f265037 | 281 | cb = new0(netdev_join_callback, 1); |
02b59d57 TG |
282 | if (!cb) |
283 | return log_oom(); | |
284 | ||
285 | cb->callback = callback; | |
286 | cb->link = link; | |
563c69c6 | 287 | link_ref(link); |
02b59d57 | 288 | |
52433f6b | 289 | LIST_PREPEND(callbacks, netdev->callbacks, cb); |
3be1d7e0 | 290 | |
79008bdd | 291 | log_netdev_debug(netdev, "will enslave '%s', when reday", |
aa9f1140 TG |
292 | link->ifname); |
293 | } | |
3f265037 TG |
294 | |
295 | return 0; | |
296 | } | |
297 | ||
d39edfc7 | 298 | int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) { |
c3ebdce3 | 299 | uint16_t type; |
d39edfc7 | 300 | const char *kind; |
ca4e095a LP |
301 | const char *received_kind; |
302 | const char *received_name; | |
d39edfc7 TG |
303 | int r, ifindex; |
304 | ||
50add290 | 305 | assert(netdev); |
c3ebdce3 | 306 | assert(message); |
02b59d57 | 307 | |
c3ebdce3 | 308 | r = sd_rtnl_message_get_type(message, &type); |
ba5596ec | 309 | if (r < 0) { |
79008bdd | 310 | log_netdev_error(netdev, "Could not get rtnl message type"); |
c3ebdce3 | 311 | return r; |
ba5596ec | 312 | } |
c3ebdce3 | 313 | |
ba5596ec | 314 | if (type != RTM_NEWLINK) { |
79008bdd | 315 | log_netdev_error(netdev, "Can not set ifindex from unexpected rtnl message type"); |
c3ebdce3 | 316 | return -EINVAL; |
ba5596ec | 317 | } |
d39edfc7 | 318 | |
a21df104 TG |
319 | r = sd_rtnl_message_link_get_ifindex(message, &ifindex); |
320 | if (r < 0) { | |
79008bdd | 321 | log_netdev_error(netdev, "Could not get ifindex: %s", strerror(-r)); |
a21df104 TG |
322 | netdev_enter_failed(netdev); |
323 | return r; | |
324 | } else if (ifindex <= 0) { | |
79008bdd | 325 | log_netdev_error(netdev, "Got invalid ifindex: %d", ifindex); |
a21df104 TG |
326 | netdev_enter_failed(netdev); |
327 | return r; | |
328 | } | |
329 | ||
a21df104 TG |
330 | if (netdev->ifindex > 0) { |
331 | if (netdev->ifindex != ifindex) { | |
79008bdd | 332 | log_netdev_error(netdev, "Could not set ifindex to %d, already set to %d", |
a21df104 TG |
333 | ifindex, netdev->ifindex); |
334 | netdev_enter_failed(netdev); | |
335 | return -EEXIST; | |
336 | } else | |
337 | /* ifindex already set to the same for this netdev */ | |
338 | return 0; | |
339 | } | |
340 | ||
c6315a7a TG |
341 | r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &received_name); |
342 | if (r < 0) { | |
79008bdd | 343 | log_netdev_error(netdev, "Could not get IFNAME"); |
c6315a7a TG |
344 | return r; |
345 | } | |
346 | ||
af4e9e2c | 347 | if (!streq(netdev->ifname, received_name)) { |
79008bdd | 348 | log_netdev_error(netdev, "Received newlink with wrong IFNAME %s", |
c6315a7a TG |
349 | received_name); |
350 | netdev_enter_failed(netdev); | |
351 | return r; | |
352 | } | |
353 | ||
d39edfc7 TG |
354 | r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO); |
355 | if (r < 0) { | |
79008bdd | 356 | log_netdev_error(netdev, "Could not get LINKINFO"); |
d39edfc7 TG |
357 | return r; |
358 | } | |
359 | ||
360 | r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind); | |
361 | if (r < 0) { | |
79008bdd | 362 | log_netdev_error(netdev, "Could not get KIND"); |
d39edfc7 TG |
363 | return r; |
364 | } | |
365 | ||
505f8da7 TG |
366 | r = sd_rtnl_message_exit_container(message); |
367 | if (r < 0) { | |
79008bdd | 368 | log_netdev_error(netdev, "Could not exit container"); |
505f8da7 TG |
369 | return r; |
370 | } | |
371 | ||
30ae9dfd SS |
372 | if (netdev->kind == NETDEV_KIND_TAP) |
373 | /* the kernel does not distinguish between tun and tap */ | |
374 | kind = "tun"; | |
375 | else { | |
376 | kind = netdev_kind_to_string(netdev->kind); | |
377 | if (!kind) { | |
79008bdd | 378 | log_netdev_error(netdev, "Could not get kind"); |
30ae9dfd SS |
379 | netdev_enter_failed(netdev); |
380 | return -EINVAL; | |
381 | } | |
c3ebdce3 TG |
382 | } |
383 | ||
d39edfc7 | 384 | if (!streq(kind, received_kind)) { |
79008bdd | 385 | log_netdev_error(netdev, |
30ae9dfd | 386 | "Received newlink with wrong KIND %s, " |
c6315a7a | 387 | "expected %s", received_kind, kind); |
d39edfc7 TG |
388 | netdev_enter_failed(netdev); |
389 | return r; | |
390 | } | |
391 | ||
50add290 | 392 | netdev->ifindex = ifindex; |
52433f6b | 393 | |
79008bdd | 394 | log_netdev_debug(netdev, "netdev has index %d", netdev->ifindex); |
5261692f | 395 | |
52433f6b | 396 | netdev_enter_ready(netdev); |
02b59d57 TG |
397 | |
398 | return 0; | |
399 | } | |
400 | ||
5c8f858d TG |
401 | #define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48) |
402 | ||
3be1d7e0 | 403 | int netdev_get_mac(const char *ifname, struct ether_addr **ret) { |
5c8f858d TG |
404 | _cleanup_free_ struct ether_addr *mac = NULL; |
405 | uint8_t result[8]; | |
406 | size_t l, sz; | |
407 | uint8_t *v; | |
408 | int r; | |
409 | ||
410 | assert(ifname); | |
411 | assert(ret); | |
412 | ||
413 | mac = new0(struct ether_addr, 1); | |
414 | if (!mac) | |
415 | return -ENOMEM; | |
416 | ||
417 | l = strlen(ifname); | |
418 | sz = sizeof(sd_id128_t) + l; | |
419 | v = alloca(sz); | |
420 | ||
421 | /* fetch some persistent data unique to the machine */ | |
422 | r = sd_id128_get_machine((sd_id128_t*) v); | |
423 | if (r < 0) | |
424 | return r; | |
425 | ||
426 | /* combine with some data unique (on this machine) to this | |
427 | * netdev */ | |
428 | memcpy(v + sizeof(sd_id128_t), ifname, l); | |
429 | ||
430 | /* Let's hash the host machine ID plus the container name. We | |
431 | * use a fixed, but originally randomly created hash key here. */ | |
432 | siphash24(result, v, sz, HASH_KEY.bytes); | |
433 | ||
434 | assert_cc(ETH_ALEN <= sizeof(result)); | |
435 | memcpy(mac->ether_addr_octet, result, ETH_ALEN); | |
436 | ||
437 | /* see eth_random_addr in the kernel */ | |
438 | mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ | |
439 | mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ | |
440 | ||
441 | *ret = mac; | |
442 | mac = NULL; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
6c3e68e7 TG |
447 | static int netdev_create(NetDev *netdev, Link *link, |
448 | sd_rtnl_message_handler_t callback) { | |
aa9f1140 TG |
449 | int r; |
450 | ||
451 | assert(netdev); | |
6c3e68e7 | 452 | assert(!link || callback); |
aa9f1140 TG |
453 | |
454 | /* create netdev */ | |
455 | if (NETDEV_VTABLE(netdev)->create) { | |
6c3e68e7 TG |
456 | assert(!link); |
457 | ||
aa9f1140 TG |
458 | r = NETDEV_VTABLE(netdev)->create(netdev); |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
79008bdd | 462 | log_netdev_debug(netdev, "created"); |
aa9f1140 TG |
463 | } else { |
464 | _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL; | |
465 | ||
466 | r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0); | |
467 | if (r < 0) { | |
79008bdd | 468 | log_netdev_error(netdev, |
aa9f1140 TG |
469 | "Could not allocate RTM_NEWLINK message: %s", |
470 | strerror(-r)); | |
471 | return r; | |
472 | } | |
473 | ||
474 | r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname); | |
475 | if (r < 0) { | |
79008bdd | 476 | log_netdev_error(netdev, |
aa9f1140 TG |
477 | "Could not append IFLA_IFNAME, attribute: %s", |
478 | strerror(-r)); | |
479 | return r; | |
480 | } | |
481 | ||
482 | if (netdev->mac) { | |
483 | r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac); | |
484 | if (r < 0) { | |
79008bdd | 485 | log_netdev_error(netdev, |
aa9f1140 TG |
486 | "Could not append IFLA_ADDRESS attribute: %s", |
487 | strerror(-r)); | |
488 | return r; | |
489 | } | |
490 | } | |
491 | ||
492 | if (netdev->mtu) { | |
493 | r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu); | |
494 | if (r < 0) { | |
79008bdd | 495 | log_netdev_error(netdev, |
aa9f1140 TG |
496 | "Could not append IFLA_MTU attribute: %s", |
497 | strerror(-r)); | |
498 | return r; | |
499 | } | |
500 | } | |
501 | ||
502 | if (link) { | |
503 | r = sd_rtnl_message_append_u32(m, IFLA_LINK, link->ifindex); | |
504 | if (r < 0) { | |
79008bdd | 505 | log_netdev_error(netdev, |
aa9f1140 TG |
506 | "Colud not append IFLA_LINK attribute: %s", |
507 | strerror(-r)); | |
508 | return r; | |
509 | } | |
510 | } | |
511 | ||
512 | r = sd_rtnl_message_open_container(m, IFLA_LINKINFO); | |
513 | if (r < 0) { | |
79008bdd | 514 | log_netdev_error(netdev, |
aa9f1140 TG |
515 | "Could not append IFLA_LINKINFO attribute: %s", |
516 | strerror(-r)); | |
517 | return r; | |
518 | } | |
519 | ||
520 | r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA, | |
521 | netdev_kind_to_string(netdev->kind)); | |
522 | if (r < 0) { | |
79008bdd | 523 | log_netdev_error(netdev, |
aa9f1140 TG |
524 | "Could not append IFLA_INFO_DATA attribute: %s", |
525 | strerror(-r)); | |
526 | return r; | |
527 | } | |
528 | ||
529 | if (NETDEV_VTABLE(netdev)->fill_message_create) { | |
530 | r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m); | |
531 | if (r < 0) | |
532 | return r; | |
533 | } | |
534 | ||
535 | r = sd_rtnl_message_close_container(m); | |
536 | if (r < 0) { | |
79008bdd | 537 | log_netdev_error(netdev, |
aa9f1140 TG |
538 | "Could not append IFLA_LINKINFO attribute: %s", |
539 | strerror(-r)); | |
540 | return r; | |
541 | } | |
542 | ||
543 | r = sd_rtnl_message_close_container(m); | |
544 | if (r < 0) { | |
79008bdd | 545 | log_netdev_error(netdev, |
aa9f1140 TG |
546 | "Could not append IFLA_LINKINFO attribute: %s", |
547 | strerror(-r)); | |
548 | return r; | |
549 | } | |
550 | ||
551 | ||
6c3e68e7 TG |
552 | if (link) { |
553 | r = sd_rtnl_call_async(netdev->manager->rtnl, m, | |
554 | callback, link, 0, NULL); | |
555 | if (r < 0) { | |
79008bdd | 556 | log_netdev_error(netdev, |
6c3e68e7 TG |
557 | "Could not send rtnetlink message: %s", |
558 | strerror(-r)); | |
559 | return r; | |
560 | } | |
aa9f1140 | 561 | |
6c3e68e7 TG |
562 | link_ref(link); |
563 | } else { | |
564 | r = sd_rtnl_call_async(netdev->manager->rtnl, m, | |
565 | netdev_create_handler, netdev, 0, | |
566 | NULL); | |
567 | if (r < 0) { | |
79008bdd | 568 | log_netdev_error(netdev, |
6c3e68e7 TG |
569 | "Could not send rtnetlink message: %s", |
570 | strerror(-r)); | |
571 | return r; | |
572 | } | |
573 | ||
574 | netdev_ref(netdev); | |
575 | } | |
aa9f1140 TG |
576 | |
577 | netdev->state = NETDEV_STATE_CREATING; | |
578 | ||
79008bdd | 579 | log_netdev_debug(netdev, "creating"); |
aa9f1140 TG |
580 | } |
581 | ||
582 | return 0; | |
583 | } | |
584 | ||
585 | /* the callback must be called, possibly after a timeout, as otherwise the Link will hang */ | |
586 | int netdev_join(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) { | |
587 | int r; | |
588 | ||
589 | assert(netdev); | |
590 | assert(netdev->manager); | |
591 | assert(netdev->manager->rtnl); | |
592 | assert(NETDEV_VTABLE(netdev)); | |
593 | ||
594 | switch (NETDEV_VTABLE(netdev)->create_type) { | |
595 | case NETDEV_CREATE_MASTER: | |
596 | r = netdev_enslave(netdev, link, callback); | |
597 | if (r < 0) | |
598 | return r; | |
599 | ||
600 | break; | |
601 | case NETDEV_CREATE_STACKED: | |
6c3e68e7 | 602 | r = netdev_create(netdev, link, callback); |
aa9f1140 TG |
603 | if (r < 0) |
604 | return r; | |
605 | ||
606 | break; | |
607 | default: | |
608 | assert_not_reached("Can not join independent netdev"); | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
52433f6b | 614 | static int netdev_load_one(Manager *manager, const char *filename) { |
14b746f7 | 615 | _cleanup_netdev_unref_ NetDev *netdev = NULL; |
aa9f1140 | 616 | _cleanup_free_ NetDev *netdev_raw = NULL; |
02b59d57 TG |
617 | _cleanup_fclose_ FILE *file = NULL; |
618 | int r; | |
619 | ||
bf1bc670 TA |
620 | assert(manager); |
621 | assert(filename); | |
622 | ||
02b59d57 TG |
623 | file = fopen(filename, "re"); |
624 | if (!file) { | |
625 | if (errno == ENOENT) | |
626 | return 0; | |
627 | else | |
ecb08ec6 | 628 | return -errno; |
02b59d57 TG |
629 | } |
630 | ||
ed88bcfb ZJS |
631 | if (null_or_empty_fd(fileno(file))) { |
632 | log_debug("Skipping empty file: %s", filename); | |
633 | return 0; | |
634 | } | |
635 | ||
aa9f1140 TG |
636 | netdev_raw = new0(NetDev, 1); |
637 | if (!netdev_raw) | |
02b59d57 TG |
638 | return log_oom(); |
639 | ||
aa9f1140 | 640 | netdev_raw->kind = _NETDEV_KIND_INVALID; |
02b59d57 | 641 | |
326cb406 | 642 | r = config_parse(NULL, filename, file, |
aa9f1140 | 643 | "Match\0NetDev\0", |
e9f3d2d5 | 644 | config_item_perf_lookup, network_netdev_gperf_lookup, |
aa9f1140 | 645 | true, false, true, netdev_raw); |
36f822c4 | 646 | if (r < 0) |
02b59d57 | 647 | return r; |
02b59d57 | 648 | |
aa9f1140 TG |
649 | r = fseek(file, 0, SEEK_SET); |
650 | if (r < 0) | |
651 | return -errno; | |
652 | ||
2023dc8a TG |
653 | /* skip out early if configuration does not match the environment */ |
654 | if (net_match_config(NULL, NULL, NULL, NULL, NULL, | |
aa9f1140 TG |
655 | netdev_raw->match_host, netdev_raw->match_virt, |
656 | netdev_raw->match_kernel, netdev_raw->match_arch, | |
2023dc8a TG |
657 | NULL, NULL, NULL, NULL, NULL, NULL) <= 0) |
658 | return 0; | |
659 | ||
aa9f1140 | 660 | if (!NETDEV_VTABLE(netdev_raw)) { |
e46eab86 | 661 | log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename); |
52433f6b | 662 | return 0; |
3be1d7e0 | 663 | } |
2023dc8a | 664 | |
aa9f1140 | 665 | if (!netdev_raw->ifname) { |
1a436809 | 666 | log_warning("NetDev without Name configured in %s. Ignoring", filename); |
326cb406 SS |
667 | return 0; |
668 | } | |
669 | ||
aa9f1140 TG |
670 | netdev = malloc0(NETDEV_VTABLE(netdev_raw)->object_size); |
671 | if (!netdev) | |
672 | return log_oom(); | |
fe6b2d55 | 673 | |
aa9f1140 TG |
674 | netdev->n_ref = 1; |
675 | netdev->manager = manager; | |
676 | netdev->state = _NETDEV_STATE_INVALID; | |
677 | netdev->kind = netdev_raw->kind; | |
678 | netdev->ifname = netdev_raw->ifname; | |
326cb406 | 679 | |
aa9f1140 TG |
680 | if (NETDEV_VTABLE(netdev)->init) |
681 | NETDEV_VTABLE(netdev)->init(netdev); | |
682 | ||
683 | r = config_parse(NULL, filename, file, | |
684 | NETDEV_VTABLE(netdev)->sections, | |
685 | config_item_perf_lookup, network_netdev_gperf_lookup, | |
686 | false, false, false, netdev); | |
687 | if (r < 0) | |
688 | return r; | |
689 | ||
690 | /* verify configuration */ | |
691 | if (NETDEV_VTABLE(netdev)->config_verify) { | |
692 | r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename); | |
693 | if (r < 0) | |
694 | return 0; | |
fe6b2d55 TG |
695 | } |
696 | ||
52433f6b TG |
697 | netdev->filename = strdup(filename); |
698 | if (!netdev->filename) | |
02b59d57 TG |
699 | return log_oom(); |
700 | ||
5c8f858d TG |
701 | if (!netdev->mac) { |
702 | r = netdev_get_mac(netdev->ifname, &netdev->mac); | |
703 | if (r < 0) { | |
704 | log_error("Failed to generate predictable MAC address for %s", | |
705 | netdev->ifname); | |
706 | return r; | |
707 | } | |
708 | } | |
709 | ||
af4e9e2c | 710 | r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev); |
02b59d57 TG |
711 | if (r < 0) |
712 | return r; | |
713 | ||
52433f6b | 714 | LIST_HEAD_INIT(netdev->callbacks); |
02b59d57 | 715 | |
79008bdd | 716 | log_netdev_debug(netdev, "loaded %s", netdev_kind_to_string(netdev->kind)); |
3be1d7e0 | 717 | |
aa9f1140 TG |
718 | switch (NETDEV_VTABLE(netdev)->create_type) { |
719 | case NETDEV_CREATE_MASTER: | |
720 | case NETDEV_CREATE_INDEPENDENT: | |
6c3e68e7 | 721 | r = netdev_create(netdev, NULL, NULL); |
9e358851 | 722 | if (r < 0) |
1eb80875 | 723 | return 0; |
9e358851 | 724 | |
aa9f1140 TG |
725 | break; |
726 | default: | |
727 | break; | |
54abf461 | 728 | } |
02b59d57 | 729 | |
52433f6b | 730 | netdev = NULL; |
02b59d57 TG |
731 | |
732 | return 0; | |
733 | } | |
734 | ||
52433f6b | 735 | int netdev_load(Manager *manager) { |
1a436809 | 736 | NetDev *netdev; |
02b59d57 TG |
737 | char **files, **f; |
738 | int r; | |
739 | ||
740 | assert(manager); | |
741 | ||
52433f6b | 742 | while ((netdev = hashmap_first(manager->netdevs))) |
14b746f7 | 743 | netdev_unref(netdev); |
02b59d57 | 744 | |
2ad8416d | 745 | r = conf_files_list_strv(&files, ".netdev", NULL, network_dirs); |
02b59d57 | 746 | if (r < 0) { |
da927ba9 | 747 | log_error_errno(r, "Failed to enumerate netdev files: %m"); |
02b59d57 TG |
748 | return r; |
749 | } | |
750 | ||
751 | STRV_FOREACH_BACKWARDS(f, files) { | |
52433f6b | 752 | r = netdev_load_one(manager, *f); |
02b59d57 TG |
753 | if (r < 0) |
754 | return r; | |
755 | } | |
756 | ||
757 | strv_free(files); | |
758 | ||
759 | return 0; | |
760 | } |